Temperature measuring device for cable bus

Abstract

The utility model relates to a temperature measuring device for a cable bus. The temperature measuring device comprises a temperature measuring module, a power supply module, a wireless transmission module and a mounting and fixing structure, the mounting and fixing structure adopts an openable hoop, and the hoop sleeves the outer side of the cable bus after being closed; the temperature measuring module comprises a heat conducting sheet in contact with a cable bus and a temperature sensor fixed on the heat conducting sheet; the power supply module is arranged in the hoop and is used for providing electric energy for the temperature measuring module and the wireless transmission module; the wireless transmission module comprises a wireless chip and an antenna which are connected with the temperature sensor, and is used for sending the temperature data to an external monitoring terminal; the high-voltage cable bus temperature measuring device has the advantages that the high-voltage cable bus temperature measuring device can be quickly mounted through the openable clamp, durability is improved by adopting corrosion-resistant metal materials, temperature measuring precision is optimized by combining the high-thermal-conductivity sheet and the high-precision sensor, the problems that materials of a traditional device are easy to corrode, mounting is tedious, temperature measuring errors are large and the like are solved, and the high-voltage cable bus temperature measuring device is suitable for real-time temperature monitoring of a high-voltage cable bus.

Description

Technical Field

[0001] This utility model belongs to the field of high-voltage cable temperature measurement technology, and in particular to a temperature measurement device for high-voltage cable busbars. Background Technology

[0002] As a key device for node connection in a 10kV cable system, the operating status of the busbars inside the high-voltage cable branch box directly affects the stability of the power system. Because busbars are prone to abnormal temperature rises due to poor contact and insulation aging during long-term high-load operation, which can lead to short circuits and other faults in severe cases, real-time online temperature monitoring of the busbars is an important means of preventing power accidents and ensuring the safe operation of the system.

[0003] In existing technologies, temperature measuring devices for high-voltage cable busbars mainly employ a clamp-type structure fixed to the outside of the busbar, collecting temperature data through temperature sensors and transmitting it to a monitoring terminal. However, these technologies have the following shortcomings:

[0004] Firstly, traditional clamping rings are mostly made of ordinary metal materials, which are prone to oxidation and corrosion when exposed to complex environments such as high pressure and humidity for a long time, resulting in a decrease in structural strength and affecting the life of the device.

[0005] Secondly, the clamping preload is fixed, making it difficult to adapt to busbars of different diameters. Excessive clamping force may damage the outer sheath of the busbar, while insufficient clamping force may cause the device to loosen and the temperature measurement data to be distorted.

[0006] Third, installation and maintenance require repeated disassembly with the aid of tools, which is cumbersome and not conducive to rapid deployment;

[0007] Fourth, temperature measurement modules often use contact sensors that are in direct contact with the busbar, which may result in large temperature data errors due to low thermal conductivity or insufficient sensor accuracy.

[0008] In summary, existing technologies still have room for improvement in terms of material durability, adaptability, ease of installation and maintenance, and temperature measurement accuracy. There is an urgent need for a cable busbar temperature measurement device with better overall performance. Utility Model Content

[0009] The purpose of this invention is to solve the above-mentioned problems in the prior art and to provide a temperature measuring device for cable busbars.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0011] A temperature measuring device for cable busbars includes a temperature measuring module, a power supply module, a wireless transmission module, and an installation and fixing structure. The installation and fixing structure adopts an openable clamp, which, when closed, is fitted onto the outside of the cable busbar. The temperature measuring module includes a heat-conducting plate in contact with the cable busbar and a temperature sensor fixed on the heat-conducting plate. The power supply module is disposed inside the clamp and is used to provide power to the temperature measuring module and the wireless transmission module. The wireless transmission module includes a wireless chip and an antenna connected to the temperature sensor and is used to transmit temperature data to an external monitoring terminal.

[0012] Preferably, the clamp consists of an upper clamping ring, a lower clamping ring, and a locking bolt; one side of the upper clamping ring and the lower clamping ring are hinged by a rotating shaft, and the other side has a slot, in which a locking bolt is provided; one end of the locking bolt is hinged to the lower clamping ring, and the other end is provided with a locking nut; the upper clamping ring and the lower clamping ring are fixed by the locking bolt and the locking nut, and after closing, they form an annular cavity for sleeved cable busbar.

[0013] Preferably, the locking nut is provided with a rotating lug for easy operation.

[0014] Preferably, the inner sides of both the upper and lower retaining rings are fitted with elastic silicone rubber pads.

[0015] Preferably, the heat-conducting sheet is a thin sheet of copper or aluminum metal, coated with thermal grease, and fixed to the inner side of the upper retaining ring at the position where it contacts the busbar.

[0016] Preferably, the upper and lower retaining rings are made of 304 stainless steel or 6061-T6 aluminum alloy.

[0017] Preferably, the temperature sensor is a digital temperature sensor, specifically a DS18B20 or MAX31820.

[0018] Due to the adoption of the above technical solution, the beneficial effects obtained by this utility model include:

[0019] 1. This utility model features an openable clamp design (upper / lower clamp ring hinged + locking bolt), which supports quick insertion into the busbar without complete disassembly; the rotating lug structure of the locking nut enables one-handed operation, reduces tool dependence, and significantly improves on-site deployment and maintenance efficiency;

[0020] 2. The retaining ring in this utility model is made of 304 stainless steel (strong corrosion resistance) or 6061-T6 aluminum alloy (high strength and lightweight), which is suitable for complex environments such as high pressure, humidity and salt spray, and avoids the structural failure caused by oxidation and corrosion of traditional metal clamping rings; and the elastic silicone rubber pad on the inner side of the retaining ring (mesh anti-slip texture + buffering properties) not only enhances friction to prevent loosening, but also buffers the clamping force to protect the outer sheath of the busbar, and is compatible with busbars of different diameters, solving the problem that the pre-tightening force of traditional clamping rings is prone to damage to the busbar or loosening.

[0021] 3. In this utility model, the power module is integrated into the clamp, and the wireless transmission module (wireless chip + antenna) transmits data in real time, realizing a closed loop of the entire process of "temperature measurement-power supply-transmission", ensuring continuous online monitoring of the temperature of the high-voltage cable busbar, and providing reliable data support for the safe operation of the power system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an embodiment of the temperature measuring device for cable busbars according to this utility model.

[0023] Figure 2 This is a structural connection diagram of an embodiment of the upper retaining ring, lower retaining ring, and rotating shaft of this utility model.

[0024] Figure 3 This is a structural connection diagram of an embodiment of the locking bolt and slot of this utility model.

[0025] Figure 4 This is a front view of an embodiment of the temperature measuring device for cable busbars according to this utility model.

[0026] Figure 5 This is an embodiment of the temperature measuring device for cable busbars according to this utility model.

[0027] Figure 6 This is a partial flowchart of an embodiment of the temperature measuring device for cable busbars according to this utility model.

[0028] The attached figures are labeled as follows:

[0029] 1. Clamp; 11. Upper retaining ring; 12. Lower retaining ring; 13. Locking bolt; 14. Groove;

[0030] 15. Locking nut; 16. Rotating lug; 17. Gasket; 18. Shaft;

[0031] 2. Heat-conducting sheet; 3. Temperature sensor; 4. Power module;

[0032] 5. Wireless chip; 6. Antenna. Detailed Implementation

[0033] Please see Figure 1-6As shown, this utility model mainly provides a temperature measuring device for cable busbars, including a temperature measuring module, a power supply module, a wireless transmission module, and an installation and fixing structure. The installation and fixing structure is an openable clamp 1, which, when closed, is fitted onto the outside of the cable busbar. The openable clamp, when closed, is fitted onto the outside of the cable busbar (such as the busbar inside a 10kV high-voltage cable branch box), serving as the mounting carrier for the overall structure. The temperature measuring module includes a heat-conducting plate 2 that contacts the cable busbar and a temperature sensor 3 fixed on the heat-conducting plate. The heat-conducting plate 2 of the temperature measuring module can directly contact the cable busbar (such as the outer surface of the busbar), and the temperature sensor 3 (such as a DS18B20) is fixed on the heat-conducting plate 2 to collect data in real time. Busbar temperature; power module 4 (such as a micro lithium battery or inductive power module) is integrated inside the clamp to provide power to the temperature measurement module and wireless transmission module; the wireless transmission module includes a wireless chip 5 and an antenna 6, wherein the wireless chip 5 (such as a Zigbee or LoRa chip) is electrically connected to the temperature sensor 3 and transmits temperature data to an external monitoring terminal (such as a power monitoring system) through the antenna 6; this application realizes real-time temperature monitoring of the cable busbar through modular design, and the closable clamp serves as the installation carrier, solving the problem of cumbersome installation of traditional devices; the modules work together to cover the entire process of "temperature measurement-power supply-transmission", meeting the core requirements of online monitoring of high-voltage cable busbars.

[0034] Specifically:

[0035] In this embodiment, the clamp 1 consists of an upper clamping ring 11, a lower clamping ring 12, and a locking bolt 13. The upper clamping ring 11 and the lower clamping ring 12 are hinged on one side by a rotating shaft 18 (such as a stainless steel pin), allowing them to rotate around the shaft to open and close. On the other side, a slot 14 (such as a rectangular slot, with a diameter 1-3 cm larger than the screw rod for easy flipping and fitting) is provided. A locking bolt 13 (such as an M6 stainless steel bolt) is installed in the slot 14. One end of the bolt is hinged to the lower clamping ring (such as by a U-shaped groove for limiting), and the other end is fitted with a locking nut 15 (such as an M6 hexagonal nut). When closed, the upper clamping ring 11 and the lower clamping ring 12 fit together to form an annular cavity (the inner diameter is slightly larger than the diameter of the busbar; for example, if the busbar diameter is 50 mm, the inner diameter of the cavity is 52 mm), which is fixed by the locking bolt and nut.

[0036] It should be noted that the openable structure supports quick installation (no need to completely disassemble the clamp, just rotate the upper clamp ring to fit the busbar). The design of the groove 14 and the locking bolt 13 takes into account both the reliability of the fixation and the convenience of operation, and solves the problem that the pre-tightening force of the traditional clamp ring is not adjustable and the installation requires repeated disassembly with tools.

[0037] In addition, for ease of operation, 2-3 rotating lugs 16 (such as rectangular protrusions with a length of 5mm) are provided on the outer edge of the locking nut 15 (such as a hexagonal nut). The rotating lugs 16 are integrally formed with the nut (such as by stainless steel stamping). During installation, the operator can directly tighten or loosen the nut by pinching the rotating lugs with their fingers, without the need for tools such as wrenches.

[0038] It should be noted that the design of the rotating ear 16 reduces the reliance on tools for installation and maintenance, enabling "one-handed operation" and improving on-site deployment efficiency. It is especially suitable for narrow spaces or emergency maintenance scenarios (such as the rapid adjustment of busbar temperature measurement devices in high-voltage cabinets).

[0039] In this embodiment, an elastic silicone rubber gasket 17 (2-3 mm thick, Shore A hardness A50-60) is bonded to the inner sides (the side in contact with the busbar) of the upper retaining ring 11 and the lower retaining ring 12. This gasket 17 is positioned on both sides of the heat-conducting plate 2 and does not completely cover it, thus not affecting the data monitoring of the heat-conducting plate 2. Simultaneously, a grid-like anti-slip texture (such as 0.5 mm deep intersecting grooves) is machined on the surface of the gasket 17. The gasket is fixed to the retaining rings with a high-temperature resistant adhesive (such as silicone rubber), ensuring close contact between the gasket and the outer sheath of the busbar after closure.

[0040] It should be noted that: the cushioning effect of the elastic silicone rubber in gasket 17 can prevent the retaining ring from directly squeezing the outer sheath of the busbar (such as the insulation layer), and prevent damage to the outer sheath due to excessive clamping force; the grid pattern increases the friction between the gasket and the busbar, preventing the device from loosening due to vibration or thermal expansion and contraction, ensuring continuous contact between the temperature measuring module and the busbar, and solving the problem of temperature measurement data distortion caused by loosening in traditional devices; the high voltage resistance and aging resistance of silicone rubber (such as being able to withstand 10kV high voltage and -40℃~125℃ environment) extend the service life of the gasket.

[0041] In this embodiment, the heat-conducting sheet 2 is made of a 0.5-1mm thick copper or aluminum sheet (such as a copper sheet with a thermal conductivity of 401W / (m·K)), and its surface is uniformly coated with thermal grease (such as Shin-Etsu G-751 with a thermal resistance ≤0.06℃·in). 2 / W). The heat-conducting plate 2 can be fixed to the gasket notch inside the upper retaining ring by a countersunk screw (such as an M3 stainless steel screw) (the notch size matches the heat-conducting plate), ensuring that the heat-conducting plate is in direct contact with the busbar; among them, the high thermal conductivity of copper / aluminum accelerates the transfer of heat from the busbar to the temperature sensor, reducing the temperature measurement delay.

[0042] In this embodiment, the upper retaining ring 11 and the lower retaining ring 12 are made of 304 stainless steel (containing 18% chromium and 8% nickel, with strong corrosion resistance) or 6061-T6 aluminum alloy (aged and strengthened, with a tensile strength ≥290MPa). The retaining rings are formed by die stamping or CNC machining (e.g., 3-5mm thick plates), and the surfaces are passivated (stainless steel) or anodized (aluminum alloy). The corrosion resistance of 304 stainless steel and the high strength of 6061-T6 aluminum alloy can adapt to complex environments such as high pressure, humidity, and salt spray (e.g., outdoor cable distribution boxes), avoiding structural failure caused by oxidation and corrosion of traditional ordinary metal clamps; at the same time, the lightweight characteristics of aluminum alloy (density approximately 2.7g / cm³) further enhance its advantages. 3 (It is only 1 / 3 the weight of stainless steel) reduces the overall weight of the device and reduces the additional load on the busbar.

[0043] In this embodiment, the temperature sensor 3 is a digital temperature sensor, model DS18B20 or MAX31820; wherein, the temperature sensor 3 can be connected to the wireless chip via a wire; the digital sensor directly outputs digital signals (without analog-to-digital conversion circuit), has strong anti-interference ability (such as stable signal under high voltage electric field environment), and avoids signal distortion caused by electromagnetic interference of analog sensors.

[0044] How to use this utility model:

[0045] 1. Open the closable clamp (the upper clamp rotates around the shaft to open), and place the clamp on the outside of the cable busbar; close the upper and lower clamps, and tighten them by hand with the locking bolts and nuts with rotating lugs (no additional tools required). At this time, the elastic silicone rubber pad on the inside of the clamp is in close contact with the outer sheath of the busbar, which plays a role in buffering protection and anti-slip.

[0046] 2. After the clamps are fixed, the heat-conducting sheet (copper / aluminum sheet + thermal grease) is directly attached to the surface of the busbar, and the temperature sensor (such as DS18B20) collects the busbar temperature data in real time through the heat-conducting sheet.

[0047] 3. The wireless transmission module (wireless chip and antenna) sends the data collected by the temperature sensor to an external monitoring terminal (such as a power monitoring system) to realize real-time online monitoring of the bus temperature.

[0048] 4. If disassembly or position adjustment is required, simply loosen the locking nut (by rotating the lug) to open the clamp. The operation is convenient and efficient.

[0049] It should be noted that this utility model, through its openable clamp design (upper / lower clamp ring hinged + locking bolt), supports quick insertion into the busbar without complete disassembly; the rotating lug structure of the locking nut enables one-handed operation, reducing tool dependence and significantly improving on-site deployment and maintenance efficiency; its clamp rings are made of 304 stainless steel (high corrosion resistance) or 6061-T6 aluminum alloy (high strength, lightweight), adapting to complex environments such as high voltage, humidity, and salt spray, avoiding structural failure caused by oxidation and corrosion of traditional metal clamps; and the elastic silicone rubber pad on the inner side of the clamp ring (grid anti-slip texture + buffering characteristics) enhances friction to prevent loosening and buffers clamping force to protect the busbar sheath, adapting to busbars of different diameters, solving the problem of traditional clamps easily damaging or loosening the busbar due to pre-tightening force fixation; in addition, the power module is integrated into the clamp, and the wireless transmission module (wireless chip + antenna) transmits data in real time, realizing a closed loop of the entire process of "temperature measurement-power supply-transmission", ensuring continuous online monitoring of the high-voltage cable busbar temperature, and providing reliable data support for the safe operation of the power system.

[0050] The foregoing descriptions and embodiments are provided to enable those skilled in the art to understand and apply this invention. Those skilled in the art will readily make various modifications to these contents and apply the general principles described herein to other embodiments without inventive effort. Therefore, this invention is not limited to the foregoing descriptions and embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this invention without departing from its scope should be within the protection scope of this invention.

Claims

1. A temperature measuring device for cable busbars, characterized in that, The system includes a temperature measurement module, a power supply module, a wireless transmission module, and an installation and fixing structure. The installation and fixing structure uses an openable clamp, which, when closed, is fitted onto the outside of the cable busbar. The temperature measurement module includes a heat-conducting plate in contact with the cable busbar and a temperature sensor fixed on the heat-conducting plate. The power supply module is located inside the clamp and is used to provide power to the temperature measurement module and the wireless transmission module. The wireless transmission module includes a wireless chip and an antenna connected to the temperature sensor and is used to transmit temperature data to an external monitoring terminal.

2. The temperature measuring device according to claim 1, characterized in that: The clamp consists of an upper clamping ring, a lower clamping ring, and a locking bolt. The upper and lower clamping rings are hinged on one side by a pivot, and a slot is opened on the other side, in which a locking bolt is installed. One end of the locking bolt is hinged to the lower clamping ring, and the other end is provided with a locking nut. The upper and lower clamping rings are fixed by the locking bolt and the locking nut, and when closed, they form an annular cavity for mounting the cable busbar.

3. The temperature measuring device according to claim 2, characterized in that: The locking nut is provided with a rotating lug for easy operation.

4. The temperature measuring device according to claim 2, characterized in that: Both the upper and lower retaining rings have elastic silicone rubber pads attached to their inner sides.

5. The temperature measuring device according to claim 2, characterized in that: The heat-conducting sheet is a thin sheet of copper or aluminum metal, coated with thermal grease, and fixed to the inner side of the upper retaining ring at the position where it contacts the busbar.

6. The temperature measuring device according to claim 2, characterized in that: The upper and lower retaining rings are made of 304 stainless steel or 6061-T6 aluminum alloy.

7. The temperature measuring device according to claim 1, characterized in that: The temperature sensor is a digital temperature sensor, specifically the DS18B20 or MAX31820.

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