Temperature sensor assembly for measuring temperature of static contact of power switch cabinet circuit breaker and system

Abstract

The utility model discloses a kind of power switchgear circuit breaker static contact temperature measurement sensor assembly and system, belong to temperature measurement technical field, the system includes the component, the component is as follows: including annular component shell, installation space of installing electronic device is configured in component shell, still including multiple pieces of clamping piece in the hole in component shell, the clamping piece is metal sheet, the outer end of clamping piece is fixedly connected with component shell, clamping piece is arranged at interval around the axis of component shell;The outer end of the clamping piece and the inner end are located at different axis positions of component shell, the inner end is located at the inboard of outer end, and the clamping piece is surrounded into conical static contact clamping space;The clamping piece is configured as any one of the following ways: at least one clamping piece extends into the installation space;At least one clamping piece is configured with heat conduction sheet in contact with it, and the heat conduction sheet extends into the installation space.The sensor assembly provided in the scheme is simple in structure, and can be conveniently installed on the static contact.

Description

Technical Field

[0001] This utility model relates to the field of temperature measurement technology, specifically to a temperature sensor assembly and system for the stationary contact of a power switchgear circuit breaker. Background Technology

[0002] In power systems, switchgear is a key device for power distribution and control, and circuit breakers are the core components of switchgear. They establish and disconnect electrical connections through the combination and separation of stationary and moving contacts. Since the positions of the stationary and moving contacts constitute the operating and conductive positions of the circuit breaker, these positions are prone to abnormalities. Temperature monitoring of the stationary contacts serves preventative maintenance and avoids the escalation of power system faults. As the number of circuit breaker operations increases and the service life extends, oxidation and arc erosion on the contact surface cause an increase in the contact resistance between the moving and stationary contacts. According to Joule's law, this most directly results in an increase in the temperature of the stationary contacts. If the contact quality is not improved through timely maintenance, it will not only be detrimental to power system loss control, but the higher stationary contact temperature will also exacerbate the decline in the conductivity of the contact surface. Compared to the periodic inspection and maintenance methods used in power transmission and maintenance, online detection of the temperature of stationary contacts can detect the status of stationary contacts in a timely manner by detecting temperature anomalies. Therefore, the use of stationary contact temperature sensor components has a positive significance in ensuring power supply reliability, reducing unnecessary power outages, and lowering the maintenance cost of power systems.

[0003] In the prior art, the intelligent temperature measuring ring for stationary contacts is a device installed on stationary contacts that can monitor temperature online and output signals. It is typically configured to include: a housing, a temperature sensor (either a digital temperature chip or a thermistor) installed inside the housing, a signal processing and communication module installed inside the housing for processing sensor data and transmitting the processing results via wired or wireless means, and a power supply module installed inside the housing for providing power to the energy-consuming components. The specific working principle is that the temperature sensor detects the temperature, converts the temperature into an electrical signal, and then sends it to the data receiving unit under the action of the communication module.

[0004] More specifically, in the prior art, patent application CN201220276615.3, entitled "A Temperature Measuring Ring for a Self-Positioning Anti-Loosening Switch Cabinet Contact," provides a technical solution that uses an annular shell as the basic structure of the temperature measuring ring, sets a temperature sensor as a temperature measuring element on the wall of the hole in the annular structure, and sets wedges, springs, and sliders in the annular shell to realize the installation of the temperature measuring ring on the object being measured, so as to ensure the reliability of the measurement.

[0005] Temperature sensor components for stationary contacts of circuit breakers in power switchgear are an important part of power monitoring systems. Further optimizing their structural design to facilitate their application in switchgear is of positive significance for the further development of smart grid technology and ensuring power supply quality. Utility Model Content

[0006] To address the aforementioned issues regarding the optimization of the structural design of temperature sensor components for stationary contacts in power switchgear circuit breakers, this utility model provides a temperature sensor component and system for stationary contacts in power switchgear circuit breakers. The sensor component provided in this solution has a simple structure and can be easily installed on the stationary contact.

[0007] The purpose of this utility model is mainly achieved through the following technical solution: a temperature sensor assembly for the stationary contact of a power switchgear circuit breaker, including an annular assembly housing, wherein the assembly housing is provided with an installation space for installing electronic devices, and also includes multiple clips located in the inner hole of the assembly housing, wherein the clips are metal sheets, the outer ends of the clips are fixedly connected to the assembly housing, and the clips are arranged at intervals around the axis of the assembly housing;

[0008] The outer and inner ends of the clamps are located at different axial positions of the component housing, with the inner end located inside the outer end, and the clamps forming a conical static contact clamping space.

[0009] The clip is configured in any of the following ways:

[0010] At least one clip extends into the mounting space;

[0011] At least one clip is configured with a heat-conducting plate in contact with it, the heat-conducting plate extending into the mounting space.

[0012] In this solution, the component housing serves as the main structure of the temperature sensor assembly, used to mount the circuit board, communication module, temperature sensor, and power module. The clips configured on the component housing serve as a mounting structure for installing the temperature sensor assembly on the stationary contact and as a heat-conducting structure for heat conduction between the stationary contact and the temperature sensor. The main differences between this solution and existing technologies include the structural design of the mounting structure and the temperature measurement method used by the temperature sensor to measure the temperature of the stationary contact, providing a simple and easily installable technical solution on the stationary contact. Specifically:

[0013] Multiple clips, spaced apart around the axis of the component housing, form the contact points between the mounting structure and the stationary contact. These contacts are specifically located at the inner ends of each clip. The inner and outer ends of the clips are positioned on different axes of the component housing, with the inner end inside the outer end. This creates a conical stationary contact clamping space where one end is larger than the other. When the temperature sensor assembly is mounted on the stationary contact, the larger end of the clamping space faces the free end of the stationary contact. During the process of introducing the stationary contact into the mounting structure, the stationary contact is guided into the clamping space from the larger end and contacts the side of the stationary contact through its inner end, thus achieving contact between the temperature sensor assembly and the stationary contact. The stationary contact is supported, enabling heat conduction between the stationary contact and the clips. At least one clip extends into the mounting space, configured such that a temperature sensor located in the mounting space can directly measure the temperature of at least one clip to obtain the temperature of the stationary contact. At least one clip is equipped with a heat-conducting plate that extends into the mounting space, configured such that a temperature sensor located in the mounting space can indirectly measure the temperature of at least one clip through the heat-conducting plate to obtain the temperature of the stationary contact. Therefore, the structural form of the mounting structure formed by the clips makes this temperature sensor assembly not only simple in structure but also very convenient to install on the stationary contact.

[0014] Meanwhile, the temperature sensor measures the temperature of the stationary contact indirectly by directly measuring the temperature of the clamping plate and indirectly by measuring the temperature of the heat-conducting sheet. Therefore, the configured temperature sensor can be embedded in the installation space. This configuration method facilitates the protection of the temperature sensor by the component housing, avoiding adverse effects on the lifespan, accuracy, and even integrity of the temperature sensor due to direct collision and sliding friction between the temperature sensor and the stationary contact during the installation of the temperature sensor assembly. Setting the clamping plate in the inner hole of the component housing is a technical solution that avoids the clamping plate being exposed relative to the component housing by wrapping the clamping plate around the component housing, which is beneficial to the electrical performance stability of the switchgear.

[0015] The clamping plates are made of metal sheets to utilize their excellent thermal conductivity. This allows the temperature sensor to detect temperature anomalies on the stationary contact relatively quickly after the temperature rises. Simultaneously, the elasticity of the metal sheets increases the contact force between the inner ends of the clamping plates and the stationary contact, ensuring reliable mounting of the temperature sensor assembly. As a specific implementation, the clamping plates are made of bronze, preferably beryllium bronze, which has excellent thermal conductivity and elasticity. In its free state, the clamping space formed by the clamping plates has a larger diameter at the large end than the outer diameter of the stationary contact, and a smaller diameter at the small end than the outer diameter. When the stationary contact is clamped, the inner ends of each clamping plate move outward in the radial direction of the stationary contact under the pressure of the stationary contact sidewall. This elastic deformation maintains the contact force between the inner ends and the stationary contact sidewall. Preferably, the clamping plates are evenly distributed in a ring around the axis of the assembly housing.

[0016] The outer and inner ends of the clips are located at different axial positions on the component housing. Specifically, for each clip, if the fixed position of its outer end on the component housing is located at the connection position between the base and the top cover, then the inner end of each clip is located at the end of the top cover or the end of the base of the component housing.

[0017] A further technical solution for the temperature sensor assembly of the stationary contact of the power switchgear circuit breaker:

[0018] It also includes an annular plate fixed to the component housing, and the clips are connected to the annular plate.

[0019] The above provides a method for fixing the clips together using a ring plate. Compared to having individual clips fixed to the component housing, this method facilitates a more stable relative position between the clips and ensures a more secure connection with the component housing. For example, in the mounting structure, the inner end of each clip is a contact point that mates with the side of the stationary contact. To ensure consistent deformation after each clip contacts the stationary contact, allowing the component to be coaxially mounted on the stationary contact, it is preferable that the inner ends of each clip are located on the same circumference in the original state. The center of the circumference is located on the axis of the component housing. To achieve this more easily, an annular plate is used to constrain the relative position of the clamps. This can be achieved by prefabricating an installation structure including the annular plate and clamps, with the inner ends of each clamp located on the same circumference, and then fixing the annular plate to the component housing in a coaxial manner. At the same time, the annular plate can also serve as the heat-conducting sheet. In specific implementation, the structure formed by the annular plate and clamps is preferably an integral structure formed by cutting the clamps and annular plate on a thin plate and bending the clamps.

[0020] The component housing includes a top cover and a base connected by screws. Both the top cover and the base are annular structures with an outer ring on the outside, an inner ring on the inside, an open end on one end, and an end plate on the other end. The open end of the top cover and the open end of the base are engaged, and the annular cavity on the top cover and the annular cavity on the base form the installation space.

[0021] The clip is fixed to the assembly housing at the snap-fit ​​position.

[0022] The above provides a specific implementation of a component housing. The top cover and the base both include an outer ring, an inner ring, and an end plate. That is, the top cover and the base are both annular groove structures. The annular cavity is the annular space in the annular groove structure. The opening ends of the top cover and the base are engaged, that is, the groove sides of the two annular groove structures are engaged with each other and fixed to each other by screws. The annular cavities of the two together form the installation space.

[0023] The above provides a specific installation method for the clip on the component housing: based on setting the component housing as a split structure including the top cover and the base, the fixing position of the clip on the component housing is selected as the position where the top cover and the base are connected, which facilitates the separate manufacturing and assembly of the top cover, the base, and the mounting structure.

[0024] It also includes an annular plate, and the clip is connected to the annular plate;

[0025] The annular plate is clamped between the upper cover and the base at the snap-fit ​​position, and the annular plate is provided with a first screw hole for the screw to pass through.

[0026] The above provides a specific implementation of mounting clips on the module housing using an annular plate. In this solution, the annular plate and the mounting structure of the clips form an integral structure. The annular plate is used to clamp between the top cover and the base to fix the clips on the module housing. The configured first screw holes, by cooperating with screws, improve the positional stability of the annular plate on the module housing. Preferably, for the screws used to establish the connection between the top cover and the base, each screw is provided with a first screw hole on the annular plate.

[0027] The annular plate is a metal plate, and the annular plate is a C-shaped plate with a notch.

[0028] The above provides a specific implementation of the annular plate. By setting the annular plate as a metal plate, on the one hand, the thermal conductivity of the annular plate can be utilized, making it a heat-conducting sheet in contact with the temperature sensor's detection surface; on the other hand, the mounting structure, including the clips and the annular plate, can be fabricated as an integral unit (either a one-piece molded structure or a spliced ​​structure). A mounting structure with high dimensional and shape accuracy can be fabricated separately, and then fixed to the component housing to achieve a good match with the dimensional parameters of the stationary contact. The use of a C-shaped annular plate aims to avoid the formation of annular eddy currents on the annular plate in AC switchgear applications. In DC switchgear applications, a completely annular metal annular plate can be used.

[0029] Both the upper cover and the base have protrusions on their inner ring sidewalls, and the end face of the protrusions provides a clamping surface for holding the annular plate between the upper cover and the base.

[0030] The upper cover and the base both have second screw holes formed on the boss for connecting them by screws.

[0031] In the above scheme, the boss is used on the one hand to increase the contact area between the top cover and the base and the annular plate, thereby increasing the assembly reliability of the component housing and the assembly reliability of the annular plate on the component housing; on the other hand, it is used to form the load-bearing structure of the second screw hole, so that the inner ring and the end plate can be set as thin-walled structures to meet the connection reliability requirements.

[0032] At least one boss is provided with a third screw hole for screwing the annular plate to the boss, and the annular plate is provided with a fourth screw hole that matches the third screw hole. The fourth screw hole is located at the position where the annular plate is connected to the clip.

[0033] In the above scheme, the third and fourth screw holes are used to establish a screw connection between the annular plate and the corresponding boss, stabilizing the relative position of the annular plate and the boss at that location. The purpose is that, for a temperature sensor disposed in the component housing, the temperature sensor is positioned at the boss location with the third screw hole. By stabilizing the position of the annular plate at this boss location, reliable contact quality between the temperature sensor and the annular plate is ensured. The selection of the position of the fourth screw hole on the annular plate in the above scheme aims to shorten the heat transfer distance from the stationary contact through the clamp to the temperature sensor's measuring surface, thereby ensuring the temperature measurement sensitivity of this component.

[0034] The boss with the third screw hole is provided with a mounting groove and a lead wire groove, and the mounting groove and the annular plate form a space for installing a temperature sensor.

[0035] The lead-in groove serves as the cable lead-in space between the mounting groove and the mounting space.

[0036] In the above scheme, the mounting groove is used to accommodate the temperature sensor. Specifically, the temperature sensor can be configured such that the temperature measuring surface is in contact with the surface of the annular plate, and the lead wire groove serves as the cable lead wire space for connecting the temperature sensor to the circuit board in the mounting space outside the boss.

[0037] Both the opening end of the top cover and the opening end of the base are equipped with positioning structures for radial positioning of the two.

[0038] It also includes a connecting hole provided on the outer ring or inner ring, the connecting hole serving as a communication channel between the outside of the component housing and the installation space.

[0039] In the above scheme, the positioning structure may include a positioning pin and pin holes configured on the top cover and the base, or it may be a stepped structure configured on the open ends of the top cover and the base, or it may be a groove or protrusion structure configured on the open ends of the top cover and the base, etc. The positioning structure is used to ensure the assembly accuracy of the top cover and the base; the connecting hole is used to install a humidity sensor in the installation space, that is, as a stationary contact position, the through hole for measuring the humidity at the stationary contact position using this component.

[0040] This solution also relates to a temperature measurement system for the stationary contact of a power switchgear circuit breaker. The system includes a temperature sensor assembly as described in any of the above claims. The temperature sensor assembly includes a temperature sensor installed in the assembly housing and used to measure the temperature of the clips.

[0041] The electronic device includes a flexible circuit board connected to a temperature sensor, and a power module and a wireless communication module are also connected to the flexible circuit board.

[0042] It also includes an exciter that provides power to the power module via electromagnetic waves, the power module being used to: acquire and store electrical energy via electromagnetic waves; the stored electrical energy serving as an energy source for a temperature sensor and a wireless communication module;

[0043] The wireless communication module is used to: receive the temperature detection results from the temperature sensor, and transmit the temperature detection results to the temperature data aggregation terminal based on wireless data transmission.

[0044] This temperature measurement system is a specific application of the temperature sensor assembly described above. In this system, a flexible circuit board is used to better adapt to the shape of the installation space, reduce the volume requirements of the installation space, and improve the utilization rate of the installation space. When used in a circuit breaker environment, compared with a rigid PCB board, it also has the characteristics of optimizing the stress on the solder joints and ensuring the reliability of the circuit board under vibration conditions. The power module is used to provide power to the energy-consuming part of the temperature sensor assembly, and the wireless communication module is used to transmit the temperature detection results to a temperature data aggregation terminal installed inside or outside the switch cabinet.

[0045] This solution also includes an exciter. The temperature sensor assembly itself is a passive component. The exciter wirelessly powers the power module, addressing issues such as maintenance concerns with battery power, battery reliability in switch cabinet temperature environments, and electrical risks associated with external circuit power. In specific implementation, the power module obtains power from a high-frequency jet signal (840MHz–960MHz) generated by an external exciter and stores this power as the energy source for the temperature sensor and wireless communication module. Since the power of the temperature sensor is significantly less than that of the wireless communication module, the temperature sensor's output is connected to a comparator. The comparator's output is connected to the logic control circuit of the wireless communication module. Based on the hardware circuit, when the comparator determines that the temperature sensor's detection result is within the normal range, the wireless communication module remains in sleep mode. When the temperature sensor's detection result exceeds the limit, the comparator triggers a wake-up pulse for the wireless communication module. The wireless communication module loads the temperature data in the latch to the data input of the wireless transmission unit and triggers the wireless transmission unit to send the temperature data to the temperature data aggregation terminal. Then, based on the delay circuit or feedback from the wireless communication module, the wireless communication module is restored to a low-power sleep state. This solution can effectively reduce component power consumption and ensure that abnormal temperature detection results can be effectively transmitted to the temperature data aggregation terminal. At the same time, as someone skilled in the art, the implementation of this power control logic can be achieved based on the existing circuit structure and does not depend on software improvements or even software.

[0046] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0047] The main differences between the structural design of the solution and the existing technology include the structural design of the clamp-based mounting structure and the temperature measurement method of the stationary contact based on the temperature sensor of the clamp, which provides a simple and convenient stationary contact temperature measurement solution that can be easily installed on the stationary contact. Attached Figure Description

[0048] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0049] Figure 1 This is a three-dimensional structural diagram of a specific embodiment of the temperature sensor assembly for the stationary contact of the circuit breaker in the power switchgear described in this utility model;

[0050] Figure 2This is a bottom view of a specific embodiment of the temperature sensor assembly for the stationary contact of the circuit breaker in the power switchgear described in this utility model;

[0051] Figure 3 This is a three-dimensional structural diagram of the base in a specific embodiment of the temperature sensor assembly for the stationary contact of the circuit breaker in the power switchgear described in this utility model.

[0052] Figure 4 This is a top view of the base in a specific embodiment of the temperature sensor assembly for the stationary contact of a circuit breaker in a power switchgear according to the present invention.

[0053] Figure 5 This is a three-dimensional structural diagram of the base in a specific embodiment of the temperature sensor assembly for the stationary contact of a circuit breaker in a power switchgear according to this utility model. This diagram is different from... Figure 3 The viewport;

[0054] Figure 6 This is a top view of the top cover in a specific embodiment of the static contact temperature sensor assembly for the power switchgear circuit breaker according to the present invention.

[0055] Figure 7 This is a three-dimensional structural diagram of the upper cover in a specific embodiment of the temperature sensor assembly for the stationary contact of the circuit breaker in the power switchgear described in this utility model.

[0056] Figure 8 This is a three-dimensional structural diagram of the installation structure of the temperature sensor assembly for the stationary contact of the power switchgear circuit breaker according to a specific embodiment of the present invention.

[0057] Figure 9 This is a top view of the installation structure of a specific embodiment of the temperature sensor assembly for the stationary contact of a power switchgear circuit breaker according to the present invention.

[0058] Figure 10 This is a front view of the installation structure of a specific embodiment of the temperature sensor assembly for the stationary contact of a power switchgear circuit breaker according to this utility model.

[0059] The reference numerals in the figure are as follows: 1. Top cover, 2. Base, 3. Clip, 4. Communicating hole, 5. Inner ring, 6. Boss, 7. Annular cavity, 8. Mounting groove, 9. Lead wire groove, 10. Outer ring, 11. Annular plate, 12. Inner hole, 13. First screw hole, 14. Second screw hole, 15. Third screw hole, 16. Fourth screw hole. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0061] Example 1:

[0062] like Figures 1 to 10 As shown, this utility model embodiment provides a temperature sensor assembly for the stationary contact of a power switchgear circuit breaker, including an annular assembly housing, in which an installation space for installing electronic devices is provided, and also includes multiple clips 3 located in the inner hole 12 of the assembly housing. The clips 3 are metal sheets, and the outer ends of the clips 3 are fixedly connected to the assembly housing. The clips 3 are arranged at intervals around the axis of the assembly housing.

[0063] The outer end and inner end of the clamping piece 3 are located at different axial positions of the component housing, and the inner end is located inside the outer end. The clamping pieces 3 form a conical static contact clamping space.

[0064] The clip 3 is configured in any of the following ways:

[0065] At least one clip 3 extends into the mounting space;

[0066] At least one clip 3 is configured with a heat-conducting plate in contact with it, the heat-conducting plate extending into the mounting space.

[0067] In this solution, the component housing serves as the main structure of the temperature sensor assembly, used to mount the circuit board, communication module, temperature sensor, and power module. The clip 3 mounted on the component housing serves as a mounting structure for installing the temperature sensor assembly on the stationary contact and as a heat-conducting structure for heat conduction between the stationary contact and the temperature sensor. The main differences between this solution and existing technologies include the structural design of the mounting structure and the temperature measurement method used by the temperature sensor to measure the temperature of the stationary contact, providing a simple and easily installable technical solution on the stationary contact. Specifically:

[0068] Multiple clips 3, spaced apart around the axis of the component housing, form the contact points between the mounting structure and the stationary contact. Specifically, each contact point is located at the inner end of one clip 3. The inner and outer ends of the clips 3 are positioned on different axes of the component housing, with the inner end inside the outer end. This creates a conical stationary contact clamping space where one end is larger than the other. When the temperature sensor assembly is mounted on the stationary contact, the larger end of the stationary contact clamping space faces the free end of the stationary contact. During the process of introducing the stationary contact into the mounting structure, the stationary contact is guided into the clamping space from the larger end and contacts the side of the stationary contact through its inner end, thus enabling the temperature sensor assembly to clamp the stationary contact. The contact is supported to facilitate heat conduction between the stationary contact and the clamp 3. At least one clamp 3 extends into the mounting space, and is configured such that a temperature sensor located in the mounting space can directly measure the temperature of at least one clamp 3 to obtain the temperature of the stationary contact. At least one clamp 3 is equipped with a heat-conducting sheet that extends into the mounting space, and is configured such that a temperature sensor located in the mounting space can indirectly measure the temperature of at least one clamp 3 through the heat-conducting sheet to obtain the temperature of the stationary contact. Therefore, the structural form of the mounting structure formed by the clamps 3 makes this temperature sensor assembly not only simple in structure but also very convenient to install on the stationary contact.

[0069] Meanwhile, the temperature sensor measures the temperature of the stationary contact by directly measuring the temperature of the clamp 3 and indirectly by measuring the temperature of the heat-conducting sheet. Therefore, the configured temperature sensor can be embedded in the installation space. This configuration facilitates the protection of the temperature sensor by the component housing, avoiding adverse effects on the lifespan, accuracy, and even integrity of the temperature sensor due to direct collision and sliding friction between the temperature sensor and the stationary contact during the installation of the temperature sensor assembly. Setting the clamp 3 in the inner hole 12 of the component housing is a technical solution that avoids the clamp 3 being exposed relative to the component housing by wrapping the clamp 3 around the component housing, which is beneficial to the electrical performance stability of the switchgear.

[0070] The clamping piece 3 is made of metal, which is intended to utilize the good thermal conductivity of the metal piece so that the temperature sensor can detect temperature anomalies on the stationary contact relatively quickly after the temperature rises. Simultaneously, the elasticity of the metal piece increases the contact force between the inner end of the clamping piece 3 and the stationary contact, allowing the temperature sensor assembly to be reliably mounted on the stationary contact. As a specific implementation, the clamping piece 3 is made of bronze; preferably, it is made of beryllium bronze, which has relatively excellent thermal conductivity and elasticity. In its free state, the clamping space formed by the clamping piece 3 has a larger diameter at the large end than the outer diameter of the stationary contact, and a smaller diameter at the small end than the outer diameter of the stationary contact. When the stationary contact is clamped, the inner ends of each clamping piece 3 move outward in the radial direction of the stationary contact under the pressure of the stationary contact sidewall. This elastic deformation generated on the clamping piece 3 maintains the contact force between the inner end and the stationary contact sidewall. Preferably, the clamping pieces 3 are evenly distributed in a ring around the axis of the assembly housing.

[0071] Example 2:

[0072] This embodiment is a further refinement of embodiment 1:

[0073] It also includes an annular plate 11 fixed to the component housing, and the clip 3 is connected to the annular plate 11.

[0074] The above provides a method for fixing the clips 3 together using an annular plate 11. Compared to the method where the clips 3 are all single structures and fixed to the component housing, this method facilitates a more stable relative position between the clips 3 and a more secure connection with the component housing. For example, in the mounting structure, the inner end of each clip 3 is a contact point that mates with the side of the stationary contact. To ensure the consistency of deformation after each clip 3 contacts the stationary contact, so that the component can be coaxially mounted on the stationary contact relative to it, it is preferable that the inner ends of each clip 3 are located on the same circumference in the original state, with the center of this circumference being... Located on the axis of the component housing, to achieve this purpose more easily, an annular plate 11 is used to constrain the relative position of the clamping pieces 3. This can be achieved by prefabricating the mounting structure including the annular plate 11 and the clamping pieces 3 such that the inner ends of each clamping piece 3 are located on the same circumference, and then fixing the annular plate 11 to the component housing in a coaxial manner with the component housing. At the same time, the annular plate 11 can also serve as the heat-conducting sheet. In specific implementation, the structure formed by the annular plate 11 and the clamping pieces 3 is preferably an integral structure formed by cutting the clamping pieces 3 and the annular plate 11 on the basis of a thin plate and bending the clamping pieces 3.

[0075] Example 3:

[0076] This embodiment is a further refinement of embodiment 1:

[0077] The component housing includes an upper cover 1 and a base 2 connected by screws. Both the upper cover 1 and the base 2 are annular structures with an outer ring 10 on the outside, an inner ring 5 on the inside, an open end on one end, and an end plate on the other end. The open end of the upper cover 1 and the open end of the base 2 are engaged. The annular cavity 7 on the upper cover 1 and the annular cavity 7 on the base 2 form the installation space.

[0078] The clip 3 is fixed on the component housing at the snap-fit ​​position.

[0079] The above provides a specific implementation of a component housing. The upper cover 1 and the base 2 both include an outer ring 10, an inner ring 5, and an end plate. That is, the upper cover 1 and the base 2 are both annular groove structures. The annular cavity 7 is the annular space in the annular groove structure. The opening ends of the upper cover 1 and the base 2 are engaged, that is, the groove sides of the two annular groove structures are engaged with each other and fixed with screws. The annular cavities 7 of the two together form the installation space.

[0080] The above provides a specific installation method for the clip 3 on the component housing: based on setting the component housing as a split structure including the top cover 1 and the base 2, the fixing position of the clip 3 on the component housing is selected as the position where the top cover 1 and the base 2 are connected, which facilitates the separate manufacturing and assembly of the top cover 1, the base 2, and the mounting structure.

[0081] Example 4:

[0082] This embodiment is a further refinement of embodiment 3:

[0083] It also includes an annular plate 11, and the clip 3 is connected to the annular plate 11;

[0084] The annular plate 11 is clamped between the upper cover 1 and the base 2 at the fastening position, and the annular plate 11 is provided with a first screw hole 13 for the screw to pass through.

[0085] The above provides a specific implementation of mounting the clamping piece 3 on the component housing using an annular plate 11. In this solution, the mounting structure including the annular plate 11 and the clamping piece 3 forms an integral structure. The annular plate 11 is used to clamp between the upper cover 1 and the base 2 to complete the fixation on the component housing. The configured first screw hole 13, by cooperating with the screw, improves the positional stability of the annular plate 11 on the component housing. Preferably, for the screws used to establish the connection between the upper cover 1 and the base 2, each screw is provided with a first screw hole 13 on the annular plate 11.

[0086] Example 5:

[0087] This embodiment is a further refinement of embodiment 4:

[0088] The annular plate 11 is a metal plate, and the annular plate 11 is a C-shaped plate with a notch.

[0089] The above provides a specific implementation of the annular plate 11. The annular plate 11 is set as a metal plate. On one hand, the thermal conductivity of the annular plate 11 can be utilized, making it a heat-conducting sheet that contacts the detection surface of the temperature sensor. On the other hand, the mounting structure, including the clip 3 and the annular plate 11, can be fabricated as an integral unit (either a one-piece molded structure or a spliced ​​structure). A mounting structure with high dimensional and shape accuracy can be fabricated separately, and then fixed to the component housing to achieve a good match with the dimensional parameters of the stationary contact. The use of a C-shaped annular plate 11 aims to prevent the formation of annular eddy currents on the annular plate 11 in AC switchgear applications. In DC switchgear applications, a completely annular metal annular plate 11 can be used.

[0090] Example 6:

[0091] This embodiment is a further refinement of embodiment 4:

[0092] Both the upper cover 1 and the inner ring 5 of the base 2 are provided with protrusions 6, and the end face of the protrusions 6 provides a clamping surface for clamping the annular plate 11 between the upper cover 1 and the base 2.

[0093] The upper cover 1 and the base 2 both have second screw holes 14 formed on the boss 6, which are used to connect the two by screws.

[0094] In the above scheme, the boss 6 is used on the one hand to increase the contact area between the top cover 1, the base 2 and the annular plate 11, thereby increasing the assembly reliability of the component housing and the assembly reliability of the annular plate 11 on the component housing; on the other hand, it is used to form the bearing structure of the second screw hole 14, so that the inner ring 5 and the end plate can be set as thin-walled structures to meet the connection reliability requirements.

[0095] Example 7:

[0096] This embodiment is a further refinement of embodiment 6:

[0097] At least one boss 6 is provided with a third screw hole 15 for screwing the annular plate 11 to the boss 6. The annular plate 11 is provided with a fourth screw hole 16 that matches the third screw hole 15. The fourth screw hole 16 is located at the position where the clip 3 is connected to the annular plate 11.

[0098] In the above scheme, the third screw hole 15 and the fourth screw hole 16 are used to establish a screw connection between the annular plate 11 and the corresponding boss 6, and to stabilize the relative position of the annular plate 11 and the boss 6 at this position. The purpose is that, for a temperature sensor configured in the component housing, the temperature sensor is positioned at the boss 6 with the third screw hole 15. By stabilizing the position of the annular plate 11 at the boss 6, reliable contact quality between the temperature sensor and the annular plate 11 is ensured. In the above scheme, the position of the fourth screw hole 16 on the annular plate 11 is selected to shorten the heat transfer distance from the stationary contact through the clamp 3 to the temperature sensor's measuring surface, thereby ensuring the temperature measurement sensitivity of this component.

[0099] Example 8:

[0100] This embodiment is a further refinement of embodiment 7:

[0101] The boss 6, which is equipped with a third screw hole 15, is provided with a mounting groove 8 and a lead wire groove 9. The mounting groove 8 and the annular plate 11 form a space for installing a temperature sensor.

[0102] The lead groove 9 serves as the cable lead space between the mounting groove 8 and the mounting space.

[0103] In the above scheme, the mounting groove 8 is used to accommodate the temperature sensor. Specifically, the temperature sensor is configured such that its measuring surface is in contact with the surface of the annular plate 11. The lead wire groove 9 serves as the cable lead wire space for the connection between the temperature sensor and the circuit board in the mounting space outside the boss 6. In a specific implementation, the annular cavity 7 on the upper cover 1 and the annular cavity 7 on the base 2 form the mounting space. A flexible circuit board is disposed in the mounting space. The flexible circuit board is fixed to the inner wall of the outer ring 10 by adhesive bonding. The cable lead wire space serves as the lead wire channel for the circuit board connection between the temperature sensor and the flexible circuit board.

[0104] Example 9:

[0105] This embodiment is a further refinement of embodiment 3:

[0106] Both the opening end of the upper cover 1 and the opening end of the base 2 are equipped with positioning structures for radial positioning of the two.

[0107] It also includes a connecting hole 4 provided on the outer ring 10 or the inner ring 5, the connecting hole 4 serving as a communication channel between the outside of the component housing and the installation space.

[0108] In the above scheme, the positioning structure may include a positioning pin and pin holes configured on the upper cover 1 and the base 2, or it may be a stepped structure configured on the open ends of the upper cover 1 and the base 2, or it may be a groove or protrusion structure configured on the open ends of the upper cover 1 and the base 2. The positioning structure is used to ensure the assembly accuracy of the upper cover 1 and the base 2. The connecting hole 4 is used to install a humidity sensor in the installation space, that is, as a static contact position, the through hole for measuring the humidity at the static contact position using this component.

[0109] Example 10:

[0110] Based on any of the above embodiments, this embodiment provides a temperature measurement system for the stationary contact of a power switchgear circuit breaker. The system includes a temperature sensor assembly as described in any of the above embodiments. The temperature sensor assembly includes a temperature sensor installed in the assembly housing and used to measure the temperature of the clip 3.

[0111] The electronic device includes a flexible circuit board connected to a temperature sensor, and a power module and a wireless communication module are also connected to the flexible circuit board.

[0112] It also includes an exciter that provides power to the power module via electromagnetic waves, the power module being used to: acquire and store electrical energy via electromagnetic waves; the stored electrical energy serving as an energy source for a temperature sensor and a wireless communication module;

[0113] The wireless communication module is used to: receive the temperature detection results from the temperature sensor, and transmit the temperature detection results to the temperature data aggregation terminal based on wireless data transmission.

[0114] This temperature measurement system is a specific application of the temperature sensor assembly described above. In this system, a flexible circuit board is used to better adapt to the shape of the installation space, reduce the volume requirements of the installation space, and improve the utilization rate of the installation space. When used in a circuit breaker environment, compared with a rigid PCB board, it also has the characteristics of optimizing the stress on the solder joints and ensuring the reliability of the circuit board under vibration conditions. The power module is used to provide power to the energy-consuming part of the temperature sensor assembly, and the wireless communication module is used to transmit the temperature detection results to a temperature data aggregation terminal installed inside or outside the switch cabinet.

[0115] This solution also includes an exciter. The temperature sensor assembly itself is a passive component. The exciter wirelessly powers the power module, addressing issues such as maintenance concerns with battery power, battery reliability in switch cabinet temperature environments, and electrical risks associated with external circuit power. In specific implementation, the power module obtains power from a high-frequency jet signal (840MHz–960MHz) generated by an external exciter and stores this power as the energy source for the temperature sensor and wireless communication module. Since the power of the temperature sensor is significantly less than that of the wireless communication module, the temperature sensor's output is connected to a comparator. The comparator's output is connected to the logic control circuit of the wireless communication module. Based on the hardware circuit, when the comparator determines that the temperature sensor's detection result is within the normal range, the wireless communication module remains in sleep mode. When the temperature sensor's detection result exceeds the limit, the comparator triggers a wake-up pulse for the wireless communication module. The wireless communication module loads the temperature data in the latch to the data input of the wireless transmission unit and triggers the wireless transmission unit to send the temperature data to the temperature data aggregation terminal. Then, based on the delay circuit or feedback from the wireless communication module, the wireless communication module is restored to a low-power sleep state. This solution can effectively reduce component power consumption and ensure that abnormal temperature detection results can be effectively transmitted to the temperature data aggregation terminal. At the same time, as someone skilled in the art, the implementation of this power control logic can be achieved based on the existing circuit structure and does not depend on software improvements or even software.

[0116] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A temperature sensor assembly for the stationary contact of a circuit breaker in a power switchgear, comprising an annular assembly housing, wherein the assembly housing is provided with mounting space for electronic components, characterized in that, It also includes multiple clips (3) located in the inner hole (12) of the component housing. The clips (3) are metal sheets. The outer ends of the clips (3) are fixedly connected to the component housing. The clips (3) are arranged at intervals around the axis of the component housing. The outer end and inner end of the clamp (3) are located at different axial positions of the component housing, and the inner end is located inside the outer end. The clamps (3) form a cone-shaped static contact clamping space. The clip (3) is configured in any of the following ways: At least one clip (3) extends into the mounting space; At least one clip (3) is provided with a heat-conducting plate in contact with it, the heat-conducting plate extending into the mounting space.

2. The temperature sensor assembly for the stationary contact of a circuit breaker in a power switchgear according to claim 1, characterized in that, It also includes an annular plate (11) fixed to the component housing, and the clip (3) is connected to the annular plate (11).

3. The temperature sensor assembly for the stationary contact of a circuit breaker in a power switchgear according to claim 1, characterized in that, The component housing includes an upper cover (1) and a base (2) connected by screws. Both the upper cover (1) and the base (2) are annular structures with an outer ring (10) on the outside, an inner ring (5) on the inside, an open end on one end, and an end plate on the other end. The open end of the upper cover (1) is engaged with the open end of the base (2). The annular cavity (7) on the upper cover (1) and the annular cavity (7) on the base (2) form the installation space. The clip (3) is fixed on the component housing at the snap-fit ​​position.

4. The temperature sensor assembly for the stationary contact of a circuit breaker in a power switchgear according to claim 3, characterized in that, It also includes an annular plate (11), to which the clip (3) is connected; The annular plate (11) is held between the upper cover (1) and the base (2) at the snap-fit ​​position, and the annular plate (11) is provided with a first screw hole (13) for the screw to pass through.

5. The temperature sensor assembly for the stationary contact of a circuit breaker in a power switchgear according to claim 2 or 4, characterized in that, The annular plate (11) is a metal plate, and the annular plate (11) is a C-shaped plate with a notch.

6. The temperature sensor assembly for the stationary contact of a circuit breaker in a power switchgear according to claim 4, characterized in that, Both the upper cover (1) and the base (2) have protrusions (6) on their inner ring (5) sidewalls. The end face of the protrusion (6) provides a clamping surface for clamping the annular plate (11) between the upper cover (1) and the base (2). The upper cover (1) and the base (2) both have second screw holes (14) formed on the boss (6) for connecting the two by screws.

7. The temperature sensor assembly for the stationary contact of a circuit breaker in a power switchgear according to claim 6, characterized in that, At least one boss (6) is provided with a third screw hole (15) for screwing the annular plate (11) to the boss (6), and the annular plate (11) is provided with a fourth screw hole (16) matching the third screw hole (15), and the fourth screw hole (16) is located at the position where the clip (3) is connected to the annular plate (11).

8. The temperature sensor assembly for the stationary contact of a circuit breaker in a power switchgear according to claim 7, characterized in that, The boss (6) with the third screw hole (15) is provided with a mounting groove (8) and a lead wire groove (9), and the mounting groove (8) and the annular plate (11) form a space for mounting a temperature sensor. The lead groove (9) serves as the cable lead space between the mounting groove (8) and the mounting space.

9. The temperature sensor assembly for the stationary contact of a circuit breaker in a power switchgear according to claim 3, characterized in that, Both the opening end of the upper cover (1) and the opening end of the base (2) are equipped with positioning structures for radial positioning of the two. It also includes a connecting hole (4) provided on the outer ring (10) or the inner ring (5), the connecting hole (4) serving as a connecting channel between the outside of the component housing and the installation space.

10. A temperature measurement system for stationary contacts of circuit breakers in power switchgear, characterized in that, The system includes a temperature sensor assembly as described in any one of claims 1 to 9, the temperature sensor assembly including a temperature sensor installed in the assembly housing and used to measure the temperature of the clip (3); The electronic device includes a flexible circuit board connected to a temperature sensor, and a power module and a wireless communication module are also connected to the flexible circuit board. It also includes an exciter that provides power to the power module via electromagnetic waves, the power module being used to: acquire and store electrical energy via electromagnetic waves; the stored electrical energy serving as an energy source for a temperature sensor and a wireless communication module; The wireless communication module is used to: receive the temperature detection results from the temperature sensor, and transmit the temperature detection results to the temperature data aggregation terminal based on wireless data transmission.

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