Temperature measurement module and system for handcart circuit breaker plum blossom contact
By designing an integrated temperature measurement module of ceramic shell and metal bracket, the problems affecting the clamping force and flow capacity of plum blossom contacts in the existing technology are solved, and efficient and accurate temperature monitoring and simplified maintenance process are achieved, reducing the impact of high-voltage electric field on the temperature measurement system.
Patent Information
- Application Number
- CN202411766612.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-03-21
AI Technical Summary
When monitoring the heating of the plum blossom contacts of the armored switch cabinet, the clamping force and flow capacity of the contacts are easily affected, and the temperature measurement module is difficult to be inspected internally, and is greatly affected by the high-voltage electric field, so data is easily lost.
A temperature measurement module for plum blossom contacts of handcart circuit breakers is designed. It adopts an integrated process of ceramic shell, temperature measurement chip and metal bracket. The rear end of the contact finger is lengthened to fix the temperature measurement component. It uses the insulation effect of the ceramic shell and the elongated conductive part of the metal bracket to ensure accurate temperature measurement and minimal impact on the high-voltage electric field.
Real-time temperature monitoring of plum blossom contacts is realized, avoiding the impact on the clamping force and flow capacity of the contacts, simplifying the maintenance and replacement of the temperature measurement module, reducing the impact on the high-voltage electric field, and reducing the possibility of data packet loss.
Smart Images
Figure CN119666186A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of high-voltage electrical appliance accessories, and in particular to a temperature measurement module and system for plum blossom contacts of a trolley circuit breaker. Background Art
[0002] Armored switchgear is widely used in 35kV-10kV power distribution and control in substations due to its good mechanical strength and insulation performance. In recent years, switchgear with large rated current on the incoming line side has frequently failed, mostly due to poor contact of plum blossom contacts, which causes contact heating and then evolves into discharge failure. In severe cases, it can cause explosions and fires and other accidents that affect the safe and stable operation of the power system. However, since the armored switchgear is a closed device, traditional infrared temperature measurement and live detection methods are difficult to effectively monitor the operating status of the internal contacts, and the low manual efficiency makes it impossible to achieve real-time online monitoring. Therefore, it is of great significance to realize real-time monitoring of the heating of the plum blossom contacts of the armored switchgear.
[0003] In the prior art, patent document CN2018108441725 discloses a wireless temperature sensor for a circuit breaker, which adopts the same installation method as the plum blossom contact finger and is plugged into the plum blossom frame along the circumferential direction, so that the wireless temperature sensor becomes a part of the circuit breaker contact, which is firmly fixed and not easy to fall off. The wireless temperature sensor is directly placed on the hot spot of the high-voltage switch cabinet circuit breaker, that is, on the circuit breaker contact. Its measurement point is the direct heat source, with accurate temperature measurement and fast response speed, thus realizing real-time monitoring of the temperature of the hot spot of the high-voltage switch cabinet.
[0004] However, the modification of the contact finger itself by the above-mentioned prior art will affect the clamping force of the plum blossom contact, the overall large current flow capacity, and the distribution of the internal high-voltage electric field. After the plum blossom contact finger is pulled out of four pieces and modified into two pieces, the main body of the plum blossom contact finger is a temperature measurement module, which basically has no flow function. Moreover, the temperature measurement module is inside the plum blossom contact, which makes it more difficult to repair and replace later. In addition, it is more affected by the high-voltage electric field, and the possibility of data packet loss is greater. Therefore, there is an urgent need for a temperature measurement device that is equipotential with the plum blossom contact, minimizes the impact of the high-voltage electric field, does not affect the clamping force of the contact finger itself, the flow capacity of the plum blossom contact, and ensures the safety of its operation. Summary of the invention
[0005] In view of the deficiencies in the prior art, the present invention provides a temperature measurement module and system for plum blossom contacts of a trolley circuit breaker to solve the above problems.
[0006] The present invention provides the following technical solutions:
[0007] A temperature measuring module for a plum blossom contact of a trolley circuit breaker comprises a temperature measuring component and a plum blossom contact, wherein the temperature measuring component comprises a ceramic shell, a temperature measuring chip, and a metal bracket, wherein the rear end of a contact finger of the plum blossom contact is lengthened, the lengthened part of the contact finger is used to fix the temperature measuring component, and the contact finger of the plum blossom contact is customized in design; the temperature measuring chip is fixed on the metal bracket, the metal bracket is provided with an elongated conductive part, and the elongated conductive part is structurally connected to the lengthened part of the contact finger; the temperature measuring chip and the metal bracket are wrapped by a ceramic shell.
[0008] Furthermore, the customized design of the contact finger is to adjust the extended part of the contact finger according to the specifications of the plum blossom contact and the distance between the plum blossom contact and the conductive arm of the trolley circuit breaker, and the extended part of the contact finger can be widened according to the customized design of the contact finger; a through hole is provided in the extended part of the contact finger, and a threaded hole is provided in the extended conductive part of the bracket, which is used in conjunction with the through hole of the extended part of the contact finger.
[0009] Furthermore, the temperature measuring chip, the metal bracket and the ceramic shell are manufactured by an integrated process.
[0010] The present invention also discloses a temperature measurement system for plum blossom contacts of a trolley circuit breaker, comprising a sensor layer, a receiving layer and a user layer; the sensor layer is applied to the aforementioned temperature measurement module for plum blossom contacts of a trolley circuit breaker, wherein the temperature measurement chip is a wireless temperature measurement sensor, the wireless temperature measurement sensor of the sensor layer measures the temperature of the measured point, and sends the temperature data to the receiving layer wirelessly; the receiving layer receives data from the sensor layer, processes and analyzes the data, and uploads the processed and analyzed data to the user layer; the user layer receives the data from the receiving layer to realize remote access, viewing and exporting of data.
[0011] Furthermore, the wireless method is radio frequency identification technology; the receiving layer uploads to the user layer through the RS485 interface in the form of Modbus-RTU standard protocol, the IEC61850 protocol converter of the user layer can convert the Modbus-RTU protocol into the 61850 standard protocol, and the receiving layer can also transmit data to the user layer in the form of network cable or optical fiber.
[0012] Furthermore, the user layer performs real-time analysis on the online temperature data, and the user layer can also implement alarm and pre-alarm functions.
[0013] The present invention has the following beneficial technical effects:
[0014] 1. The temperature measuring chip and metal bracket of the present invention are designed by adopting the ceramic shell integration process, using the ceramic substrate as the outer package, and the extended conductive part is reserved in the bracket for structural connection with the extended part of the contact finger. Under the condition of ensuring that the temperature measuring module has the minimum influence on the high-voltage electric field, the metal bracket extends to the inside of the ceramic temperature measuring module to make the temperature conduction more accurate. At the same time, the ceramic substrate has an insulating effect to avoid gap discharge in the traditional temperature measuring module; the maintenance and replacement of the ceramic temperature measuring module are more convenient and only the circuit breaker needs to be pulled out during installation, which avoids bus power outage, reduces load loss and personnel workload, reduces installation costs and improves personnel safety.
[0015] 2. The temperature sensor of the present invention should adopt wireless radio frequency identification (RFID) technology, use the reader to continuously emit radio wave energy of a specific frequency, and then send back ID, temperature, calibration and other data with the energy obtained by the induced current to complete temperature monitoring. The installation position of the temperature measurement module avoids the strong electric field interference inside the plum blossom contact and the static contact of the switch cabinet, and avoids the influence of data packet loss on the temperature measurement system.
[0016] 3. The user layer of the present invention performs real-time analysis on online temperature data, and can monitor and alarm the real-time temperature, which not only enables the operation and maintenance personnel to grasp the operation status of the switch cabinet in real time, but also realizes temperature prediction through the above data to assist the operation and maintenance personnel to judge the operation status of the switch cabinet in advance and ensure the safe operation of the equipment and the power grid. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the structure of a plum blossom contact-specific manufactured part of a temperature measurement module for a plum blossom contact of a trolley circuit breaker of the present invention;
[0018] Figure 2 It is a cross-sectional view of a temperature measuring component in a temperature measuring module for plum blossom contacts of a trolley circuit breaker according to the present invention;
[0019] Figure 3 This is a rendering of a temperature measurement component in a temperature measurement module for plum blossom contacts of a trolley circuit breaker according to the present invention;
[0020] Figure 4 The present invention is a schematic diagram of a temperature measurement system architecture for plum blossom contacts of a trolley circuit breaker.
[0021] The reference numerals in the figure are:
[0022] 1. Ceramic shell; 2. Temperature measuring chip; 3. Metal bracket; 4. Extended finger portion; 5. Extended conductive portion; 6. Through hole; 7. Threaded hole. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0024] Example
[0025] A temperature measurement module for a plum blossom contact of a trolley circuit breaker, comprising a temperature measurement component and a plum blossom contact, wherein the temperature measurement component comprises a ceramic shell 1, a temperature measurement chip 2, and a metal bracket 3. The rear end of the contact finger of the plum blossom contact is lengthened, and the contact finger of the plum blossom contact is customized. The customized design of the contact finger is to adjust the extended part of the contact finger according to the specification of the plum blossom contact and the distance between the plum blossom contact and the conductive arm of the trolley circuit breaker, and the extended part of the contact finger 4 is generally 6-8.5cm; the extended part of the contact finger 4 is used to fix the temperature measurement component; the temperature measurement chip 2 is fixed on the metal bracket 3, and the metal bracket 3 is provided with an extended conductive part 5, and the extended conductive part 5 is structurally connected to the extended part of the contact finger 4; the temperature measurement chip 2 and the metal bracket 3 are wrapped by the ceramic shell 1.
[0026] A through hole 6 is provided on the extended portion 4 of the contact finger, which is fixedly connected with a threaded hole 7 provided on the extended conductive portion 5 of the metal bracket 3. The temperature measuring chip 2, the metal bracket 3 and the ceramic shell 1 are manufactured by an integrated process. The metal bracket 3 is extended to the inside of the ceramic to make the temperature measurement more accurate, avoiding the temperature attenuation caused by the influence of the shell during temperature measurement of ordinary ceramic temperature measuring modules or other insulating shell temperature measuring modules. At the same time, the ceramic substrate has an insulating effect, avoiding gap discharge in traditional temperature measuring modules.
[0027] The present invention can customize the contact fingers of different types of plum blossom contacts and connect them to the temperature measurement module fixture, and install the temperature measurement module on the fixture to meet the application requirements of integrated equipotential, minimize the impact on the electric field strength, ensure the uniform distribution of the field strength around the circuit breaker plum blossom contact, and install the temperature measurement module and its fixture at the rear of the plum blossom contact, which is convenient for later maintenance or replacement. Among them, the customized contact fingers designed by the present invention can replace all types of plum blossom contact fingers without affecting the clamping force and current capacity of the plum blossom contact, ensuring the safety of equipment operation.
[0028] This embodiment also discloses a temperature measurement system for the plum blossom contact of a trolley circuit breaker, and the temperature measurement system includes a sensor layer, a receiving layer and a user layer. The temperature sensor of the sensor layer is arranged on the temperature measurement chip of the temperature measurement module to measure the temperature of the measured point, and sends the temperature data to the receiving layer wirelessly. The receiving device of the receiving layer receives the data from the sensor, and after processing and analyzing the data, uploads the data to the user layer through the RS485 interface in the form of the Modbus-RTU standard protocol. The IEC61850 protocol converter of the user layer can convert the Modbus-RTU protocol into the 61850 standard protocol, or transmit the data to the background device in the form of a network cable or optical fiber, so as to realize remote access, view and export data, alarm and pre-alarm functions, etc. Among them, the communication protocol adopts the ModBus-RTU protocol, which is a communication protocol widely used in the industrial field and a universal language applied to electrical communication terminals. It has become a universal industrial standard. Equipment produced by different manufacturers can be connected into an industrial network for centralized monitoring.
[0029] The background system of the present invention performs real-time analysis on online temperature data, and can not only monitor and alarm the real-time temperature, but also realize temperature alarm prediction according to the predicted data of the switch cabinet.
[0030] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.
Claims
1. A temperature measurement module for plum blossom contacts of a trolley circuit breaker, characterized in that: It includes a temperature measuring component and a plum blossom contact. The temperature measuring component includes a ceramic shell, a temperature measuring chip, and a metal bracket. The rear end of the contact finger of the plum blossom contact is lengthened, and the lengthened part of the contact finger is used to fix the temperature measuring component. The contact finger of the plum blossom contact is customized. The temperature measuring chip is fixed on the metal bracket, and the metal bracket is provided with an extended conductive part, and the extended conductive part is structurally connected to the extended part of the contact finger. The temperature measuring chip and the metal bracket are wrapped by a ceramic shell.
2. A temperature measurement module for plum blossom contacts of a trolley circuit breaker according to claim 1, characterized in that: The extended part of the contact finger is provided with a through hole, and the extended conductive part of the bracket is provided with a threaded hole for use in conjunction with the through hole of the extended part of the contact finger.
3. A temperature measurement module for plum blossom contacts of a trolley circuit breaker according to claim 2, characterized in that: The temperature measuring chip, the metal bracket and the ceramic shell are manufactured by an integrated process.
4. A temperature measurement module for plum blossom contacts of a trolley circuit breaker according to claim 3, characterized in that: The customized design of the contact finger is to design the extended part of the contact finger according to the specification of the plum blossom contact and the distance between the plum blossom contact and the conductive arm of the trolley circuit breaker.
5. A temperature measurement system for plum blossom contacts of a trolley circuit breaker, characterized in that: It comprises a sensor layer, a receiving layer and a user layer; the sensor layer is applied to a temperature measurement module for a plum blossom contact of a trolley circuit breaker as described in any one of claims 1 to 4, wherein the temperature measurement chip is a wireless temperature measurement sensor, the wireless temperature measurement sensor of the sensor layer measures the temperature of the measured point, and sends the temperature data to the receiving layer wirelessly; the receiving layer receives data from the sensor layer, processes and analyzes the data, and uploads the processed and analyzed data to the user layer; the user layer receives the data from the receiving layer to realize remote access, viewing and exporting of data.
6. A temperature measurement system for plum blossom contacts of a trolley circuit breaker according to claim 5, characterized in that: The wireless method is radio frequency identification technology.
7. A temperature measurement system for plum blossom contacts of a trolley circuit breaker according to claim 6, characterized in that: The receiving layer uploads the data to the user layer via the RS485 interface in the form of the Modbus-RTU standard protocol. The IEC61850 protocol converter at the user layer can convert the Modbus-RTU protocol into the 61850 standard protocol.
8. A temperature measurement system for plum blossom contacts of a trolley circuit breaker according to claim 6, characterized in that: The receiving layer can also transmit data to the user layer in the form of network cables or optical fibers.
9. A temperature measurement system for plum blossom contacts of a trolley circuit breaker according to claim 7 or 8, characterized in that: The user layer can also realize alarm and pre-alarm functions.