On-line temperature monitoring device for medium-voltage cabinet of photovoltaic power station

Abstract

The utility model provides a photovoltaic power station medium-voltage cabinet on-line temperature monitoring device which comprises a thermodetector, the outer end of the thermodetector is provided with a temperature measuring groove, the outer end of the temperature measuring groove is provided with a temperature measuring frame, the rear end of the temperature measuring frame is provided with a connecting frame, an instrument room partition plate used for installation is arranged between the connecting frame and the temperature measuring frame, and a hot plug port is arranged between the thermodetector and the temperature measuring groove. A spring reel is arranged at the inner end of the thermodetector, a rolling temperature measuring circuit is wound around the outer end of the spring reel, a cavity temperature measuring sensing ring is arranged at the tail end of the rolling temperature measuring circuit, a folding rolling plate is arranged at the outer end of the temperature measuring groove, and rubber rings are arranged between the temperature measuring frame and the instrument chamber partition plate and between the connecting frame and the instrument chamber partition plate respectively. The rear end of the temperature measuring frame expands outwards along the center to be provided with a ventilation groove, a threaded groove and an annular groove, the inner end of the threaded groove is provided with a threaded rod, the threaded rod is fixedly connected with the connecting frame, and the inner end of the annular groove is provided with two linkage springs. According to the invention, the problem that temperature monitoring cannot be synchronously carried out on different chambers of a medium-voltage cabinet in a photovoltaic power station in the design of temperature monitoring is solved.

Description

Technical Field

[0001] This utility model relates to the field of temperature monitoring technology, and more specifically, to an online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station. Background Technology

[0002] With the continuous expansion of photovoltaic power plants, the number of equipment is large and widely distributed. Traditional manual inspection methods are insufficient to meet the requirements of real-time performance and accuracy, necessitating the use of advanced monitoring technologies to achieve remote monitoring and management of equipment operating status. The importance of temperature monitoring: Medium-voltage switchgear is a crucial electrical device in photovoltaic power plants, and its operating temperature directly affects its performance and lifespan. Excessive temperatures can lead to equipment failure, short circuits, or even fires and other safety accidents. Therefore, real-time monitoring of the medium-voltage switchgear temperature is essential. Technological foundation: Continuous advancements in sensor technology, communication technology, and computer technology have provided technical support for the research and application of online temperature monitoring devices for medium-voltage switchgear, making high-precision and high-reliability temperature monitoring possible.

[0003] In existing technologies, temperature monitoring cannot be performed simultaneously on different chambers of the medium-voltage switchgear in photovoltaic power plants. Therefore, we propose an online temperature monitoring device for medium-voltage switchgear in photovoltaic power plants to address this issue. Summary of the Invention

[0004] The purpose of this invention is to address the problem that current temperature monitoring designs cannot simultaneously monitor the temperature of different chambers in the medium-voltage switchgear of a photovoltaic power station.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] An online temperature monitoring device for medium-voltage switchgear in photovoltaic power plants is proposed to improve the above-mentioned problems.

[0007] The application is as follows:

[0008] An online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station includes a thermometer, a temperature measuring groove at the outer end of the thermometer, a temperature measuring frame at the outer end of the temperature measuring groove, a connecting frame at the rear end of the temperature measuring frame, an instrument compartment partition for installation between the connecting frame and the temperature measuring frame, a hot-swappable port between the thermometer and the temperature measuring groove, a spring reel at the inner end of the thermometer, a winding temperature measuring line wound around the outer end of the spring reel, a chamber temperature sensing coil at the tail end of the winding temperature measuring line, a folding plate at the outer end of the temperature measuring groove, and rubber rings between the temperature measuring frame, the connecting frame, and the instrument compartment partition, respectively.

[0009] As a preferred technical solution of this application, the rear end of the temperature measuring frame is provided with a ventilation groove, a threaded groove and an annular groove that expand outward from the center. The inner end of the threaded groove is provided with a threaded rod, which is fixedly connected to the connecting frame. The inner end of the annular groove is provided with two sets of linkage springs, and the outer end of each set of linkage springs is connected to a set of arc-shaped ring plates.

[0010] As a preferred technical solution of this application, the outer end of the arc-shaped ring plate is provided with a groove, which is embedded in the inner surface of the connecting frame. An embedding groove, a sliding rod and a limiting spring are provided between the two sets of arc-shaped ring plates, and a display screen is provided at the rear end of the connecting frame.

[0011] As a preferred technical solution of this application, the temperature measuring frame is movably connected to the connecting frame through the mounting holes on the instrument compartment partition. The number of temperature measuring slots is set to several groups, and the temperature measuring slots are arranged in a circular array along the temperature measuring frame. The temperature measuring frame and the connecting frame are respectively attached to the instrument compartment partition by rubber rings for shock absorption.

[0012] As a preferred technical solution of this application, the folding roll plate moves along the outer end of the temperature measuring groove. The two ends of the folding roll plate are provided with arc-shaped grooves, which are embedded in the outer side of the temperature measuring groove. The arc-shaped grooves are movably connected to the folding roll plate, and the two ends of the folding roll plate are provided with multiple sets of movable shafts, which slide along the arc-shaped grooves.

[0013] As a preferred technical solution of this application, the ventilation slot runs through the temperature measuring frame and the connecting frame, the annular groove is embedded in the inner surface of the rear end of the ventilation slot, the inner end of the annular groove is fixedly connected to one end of the linkage spring, and the other end of the linkage spring is fixedly connected to the corresponding arc-shaped ring plate.

[0014] As a preferred technical solution of this application, the arc-shaped ring plates are slidably connected through the embedded groove and the slide rod, and the two ends of the limiting spring are fixed in the slide rod and the embedded groove.

[0015] As a preferred technical solution of this application, the assembly of the hot-swappable port connecting the temperature measuring frame transmits signals between the hot-swappable port and the chamber temperature measuring sensor coil through a winding temperature measuring line. The chamber temperature measuring sensor coil is attached to the top of each chamber, and the chamber temperature measuring sensor coil is wirelessly connected to the sensor inside the medium-voltage cabinet chamber.

[0016] As a preferred technical solution of this application, there is signal transmission between the temperature measuring frame assembly and the display screen at the back end.

[0017] As a preferred technical solution of this application, multiple sets of arc springs are provided in the arc groove, and the arc springs connect two adjacent sets of movable shafts.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] In the scheme of this application:

[0020] The hot-swappable port facilitates the installation, removal, and maintenance of the thermometer. The spring roll and winding temperature measurement line allow for flexible arrangement of the chamber temperature sensing coil. The folding plate prevents dust from entering. At the same time, the chamber temperature sensing coil is adsorbed onto the upper part of the chamber to be monitored, enabling non-contact temperature monitoring and ensuring stable temperature monitoring and information transmission.

[0021] The ventilation slots facilitate heat dissipation, and the threaded grooves, threaded rods, linkage springs, and arc-shaped ring plates work together to ensure stable and flexible installation.

[0022] With the rubber ring shock absorption and sealing, multiple sets of temperature measuring slots arranged in a ring can monitor in all directions.

[0023] The signal transmission design ensures accurate acquisition, processing, and intuitive display of temperature data, enabling real-time monitoring of the temperature of key components in the medium-voltage switchgear and guaranteeing its safe and stable operation. Attached Figure Description

[0024] Figure 1 This application provides a schematic diagram of the overall installation structure of an online temperature monitoring device for a medium-voltage switchgear in a photovoltaic power station.

[0025] Figure 2 This application provides an enlarged structural diagram of the overall structure of an online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station.

[0026] Figure 3 This application provides an overall side sectional view of an online temperature monitoring device for a medium-voltage switchgear in a photovoltaic power station.

[0027] Figure 4 This application provides an online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station. Figure 3 A magnified structural diagram of A in the middle;

[0028] Figure 5 A schematic diagram of the arc-shaped ring plate side cross-section structure of an online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station provided in this application;

[0029] Figure 6 This application provides an online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station. Figure 5 A magnified structural diagram of B in the diagram.

[0030] The image shows:

[0031] 1. Temperature measuring frame; 2. Instrument compartment partition; 3. Temperature measuring slot; 4. Thermometer; 5. Folding roll plate; 6. Spring roll; 7. Winding temperature measuring circuit; 8. Chamber temperature measuring sensor coil; 9. Rubber ring; 10. Threaded groove; 11. Connecting frame; 12. Threaded rod; 13. Ring groove; 14. Linkage spring; 15. Arc-shaped ring plate; 16. Embedded groove; 17. Slide rod; 18. Limiting spring; 19. Groove opening; 20. Display screen; 21. Ventilation slot. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0033] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, unless otherwise specified, the embodiments, features, and technical solutions in the embodiments of this utility model can be combined with each other.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] like Figures 1-6 As shown, this embodiment proposes an online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station, including a thermometer 4, a temperature measuring groove 3 at the outer end of the thermometer 4, a temperature measuring frame 1 at the outer end of the temperature measuring groove 3, a connecting frame 11 at the rear end of the temperature measuring frame 1, an instrument chamber partition 2 for installation between the connecting frame 11 and the temperature measuring frame 1, a hot-swappable port between the thermometer 4 and the temperature measuring groove 3, a spring reel 6 at the inner end of the thermometer 4, a winding temperature measuring line 7 wound around the outer end of the spring reel 6, a chamber temperature sensing coil 8 at the tail end of the winding temperature measuring line 7, a folding plate 5 at the outer end of the temperature measuring groove 3, and rubber rings 9 between the temperature measuring frame 1, the connecting frame 11 and the instrument chamber partition 2 respectively.

[0036] The hot-swappable port facilitates quick installation and removal of the thermometer 4, making maintenance and replacement easier; the spring reel 6 and the winding temperature measurement line 7 can be flexibly stretched and stored, making it convenient to place the chamber temperature sensing coil 8 to the part that needs to be monitored; the folding plate 5 can prevent dust and other foreign objects from entering the temperature measuring slot 3 and the hot-swappable port; the rubber ring 9 plays a role in shock absorption and sealing, reducing the impact of vibration on the device and preventing the intrusion of external dust and moisture.

[0037] Medium-voltage switchgear typically consists of multiple chambers. An instrumentation chamber is assembled at the top of each chamber to facilitate overall control of the chambers. The chamber temperature sensing coil 8 is magnetically attached to the top of the corresponding chamber. The chamber temperature sensing coil 8 is wirelessly connected to the temperature sensor in each chamber. The temperature sensor in the chamber receives the temperature signal from the corresponding part and transmits it to the chamber temperature sensing coil 8.

[0038] The rear end of the temperature measuring frame 1 is provided with a ventilation groove 21, a threaded groove 10 and an annular groove 13 that expand outward from the center. The inner end of the threaded groove 10 is provided with a threaded rod 12, which is fixedly connected to the connecting frame 11. The inner end of the annular groove 13 is provided with two sets of linkage springs 14, and the outer end of each set of linkage springs 14 is connected to a set of arc-shaped ring plates 15.

[0039] Ventilation slot 21 helps the device dissipate heat and ensures that the equipment works in a normal temperature environment; the threaded groove 10 and threaded rod 12 cooperate to make the temperature measuring frame 1 and the connecting frame 11 firmly connected and easy to install and adjust; the design of linkage spring 14 and arc-shaped ring plate 15 can realize the elastic connection between the two and a certain angle of rotation adjustment, increasing the installation flexibility and stability of the device.

[0040] The outer end of the arc-shaped ring plate 15 is provided with a groove 19, which is embedded in the inner surface of the connecting frame 11. An embedding groove 16, a sliding rod 17 and a limiting spring 18 are provided between the two sets of arc-shaped ring plates 15. The rear end of the connecting frame 11 is provided with a display screen 20.

[0041] The groove 19 is embedded in the inner surface of the connecting frame 11, so that the arc-shaped ring plate 15 is tightly connected to the connecting frame 11 and can rotate relative to it; the embedded groove 16, the slide rod 17 and the limiting spring 18 work together to limit the movement range of the arc-shaped ring plate 15 and ensure its stable operation; the display screen 20 allows the staff to intuitively obtain temperature monitoring data.

[0042] The temperature measuring frame 1 is movably connected to the connecting frame 11 through the mounting holes on the instrument compartment partition 2. The number of temperature measuring slots 3 is set to several groups, and the temperature measuring slots 3 are arranged in a circular array along the temperature measuring frame 1. The temperature measuring frame 1 and the connecting frame 11 are respectively attached to the instrument compartment partition 2 by rubber rings 9 for shock absorption.

[0043] The movable connection via mounting holes facilitates installation and position adjustment; the ring-shaped array of temperature measuring slots 3 allows for simultaneous temperature monitoring of different chambers in the medium-pressure cabinet from all directions; the rubber rings 9 provide shock absorption, further enhancing the stability of the device and reducing the impact of vibration on measurement accuracy.

[0044] The folding plate 5 moves along the outer end of the temperature measuring groove 3. The two ends of the folding plate 5 are provided with arc-shaped grooves, which are embedded in the outer side of the temperature measuring groove 3. The arc-shaped grooves are movably connected to the folding plate 5, and the two ends of the folding plate 5 are provided with multiple sets of movable shafts, which slide along the arc-shaped grooves.

[0045] This structure allows the folding plate 5 to move flexibly along the temperature measuring groove 3, effectively covering the hot-swap port when the temperature measuring groove 3 is not in use, preventing dust from entering, and the movable connection method ensures the normal opening and closing of the folding plate 5.

[0046] Ventilation slot 21 runs through the temperature measuring frame 1 and connecting frame 11. Annular groove 13 is embedded in the inner surface of the rear end of ventilation slot 21. The inner end of annular groove 13 is fixedly connected to one end of linkage spring 14. The other end of linkage spring 14 is fixedly connected to the corresponding arc-shaped ring plate 15.

[0047] The through-hole design of the ventilation slot 21 enhances the heat dissipation effect of the entire device; the connection between the ring groove 13 and the linkage spring 14 ensures that the linkage spring 14 can accurately control the movement of the arc ring plate 15, maintaining the stability and functionality of the device structure.

[0048] The arc-shaped ring plates 15 are slidably connected through the embedded groove 16 and the slide rod 17, and the two ends of the limiting spring 18 are fixed in the slide rod 17 and the embedded groove 16.

[0049] This connection method ensures that the arc-shaped ring plates 15 can slide relative to each other without separating. The limiting spring 18 further restricts the sliding distance, ensuring the stability of the device structure and guaranteeing the normal operation of each component.

[0050] The hot-swappable connector connects to the temperature measuring frame 1 assembly. The hot-swappable connector and the chamber temperature measuring sensor coil 8 transmit signals through the winding temperature measuring line 7. The chamber temperature measuring sensor coil 8 is attached to the top of each chamber. The chamber temperature measuring sensor coil 8 is wirelessly connected to the sensor inside the medium-pressure cabinet chamber.

[0051] The hot-swappable port enables a reliable electrical connection between the thermometer 4 and the temperature measuring frame 1 assembly; the winding temperature measuring line 7 serves as a signal transmission channel, ensuring that the temperature sensing coil 8 in the chamber can accurately transmit the temperature signal collected wirelessly to the temperature measuring frame 1.

[0052] Signal transmission between the temperature measuring frame 1 assembly and the rear display screen 20.

[0053] The temperature signal collected by the temperature measuring frame 1 can be transmitted to the display screen 20 in a timely manner, so that staff can view the temperature data in real time and detect abnormalities in a timely manner.

[0054] Multiple sets of arc-shaped springs are installed inside the arc-shaped groove, and the arc-shaped springs connect two adjacent sets of movable shafts.

[0055] The curved spring provides elastic support for the movement of the folding plate 5, making its opening and closing process smoother and more stable, while also cushioning the impact of external forces to a certain extent.

[0056] Signal transmission between thermometer 4 and temperature measuring frame 1: Each individual thermometer 4 is connected to the temperature measuring frame 1 through a hot-swappable port inserted into the temperature measuring slot 3 at the lower end. The hot-swappable port serves as an electrical connection interface, realizing the physical connection between the two. The chamber temperature sensing coil 8 at the end of the winding temperature measuring line 7 in the thermometer 4 is responsible for wirelessly collecting temperature data in different chambers. These data are transmitted to the hot-swappable port in the form of electrical signals through the winding temperature measuring line 7, and then transmitted to the temperature measuring frame 1 for integration.

[0057] Signal transmission between temperature measuring frame 1 and display screen 20: Temperature measuring frame 1 is equivalent to a signal collection and relay hub. After each temperature measuring instrument 4 transmits the collected temperature signal to temperature measuring frame 1, the temperature measuring frame 1 integrates a signal processing circuit. This circuit first integrates and preliminarily processes the signals from different temperature measuring instruments 4, converts the analog signal into a digital signal, and performs necessary encoding and error correction processing to ensure the accuracy and integrity of the signal.

[0058] The processed signal can be transmitted to the display screen 20 at the rear of the connecting frame 11 via wired or wireless means. If wired, it is connected to the signal input interface of the display screen 20 via an internal cable; if wireless, common wireless communication technologies such as Bluetooth or Wi-Fi may be used, with corresponding wireless transceiver modules installed on both the temperature measuring frame 1 and the display screen 20 to complete signal transmission. After receiving the signal, the display screen 20 decodes it and uses its own display driver circuit to display the temperature data in an intuitive numerical or graphical format for staff to view.

[0059] One specific example:

[0060] (1) Install the connecting bracket 11 and the temperature measuring bracket 1:

[0061] Install the connecting frame 11 on the instrument room of each chamber assembly of the medium-voltage switchgear in the photovoltaic power station in a suitable way (such as bolt fixing) so that it can be close to the observation surface and ensure that the display screen 20 at the rear end of the connecting frame 11 is easy for the staff to view.

[0062] Assemble the temperature measuring frame 1 and the connecting frame 11. Screw the threaded rod 12 at the rear end of the temperature measuring frame 1 into the corresponding threaded groove 10 on the connecting frame 11. At this time, pay attention to the linkage spring 14 and the arc-shaped ring plate 15 located in the annular groove 13 at the rear end of the temperature measuring frame 1. The two arc-shaped ring plates 15 are embedded into the inner surface of the connecting frame 11 through the groove opening 19 at their outer ends, and the arc-shaped ring plates 15 are slidably connected to each other through the embedding groove 16 and the sliding rod 17. The limiting spring 18 restricts their sliding range, so that they can be connected relatively stably together, and their position can be adjusted by rotating along the groove opening 19 in the connecting frame 11. Rotate the temperature measuring frame 1 so that the rubber rings 9 on the temperature measuring frame 1 and the connecting frame 11 respectively fit against the instrument compartment partition 2 to achieve the effect of shock absorption and stability.

[0063] (2) Install thermometer 4:

[0064] The chamber temperature sensing coil 8 is placed at the upper end of the medium-pressure cabinet chamber and magnetically attracted to different positions to ensure a stable wireless signal connection between the chamber temperature sensing coil 8 and the temperature sensor inside the medium-pressure cabinet chamber. The required thermometers 4 are inserted sequentially along the temperature measuring slots 3 on the temperature measuring frame 1. The lower end of the thermometer 4 is accurately inserted into the hot-swap port in the temperature measuring slot 3 to achieve a signal connection between the thermometer 4 and the temperature measuring frame 1.

[0065] Unwind the temperature measurement circuit 7 wound on the spring roll 6 inside each thermometer 4, and install the chamber temperature sensing coil 8 at the end to the upper end of the corresponding medium-pressure cabinet chamber. Ensure that the chamber temperature sensing coil 8 can be stably connected with the temperature sensor installed at the corresponding position inside the medium-pressure cabinet chamber, and ensure that the chamber temperature sensing coil 8 is in close contact with the measured part to ensure the accuracy of the measurement. For unused temperature measuring slots 3, the folding plate 5 will move along the outer end of the temperature measuring slot 3 under the action of the arc spring to cover it and prevent dust from entering the hot-swappable port.

[0066] (3) Connect the power supply:

[0067] Connect the main power cord on the temperature measuring rack 1 to the power plug in the instrument room, similar to the power supply section of a computer host, to facilitate connection and power supply to various devices, thus providing power support for the entire temperature monitoring device.

[0068] (4) Operation and monitoring:

[0069] When the medium-voltage switchgear of the photovoltaic power station is operating normally, the temperature sensing coil 8 of each chamber begins to collect the temperature data of its location in real time. This temperature data is transmitted to the corresponding temperature measuring instrument 4 in the form of an electrical signal through the winding temperature measuring line 7, and then transmitted to the temperature measuring frame 1 through the hot-swappable port.

[0070] The signal processing circuit inside the temperature measuring frame 1 integrates, performs analog-to-digital conversion (if it is an analog signal), encodes and corrects errors on the temperature signals from different temperature measuring instruments 4 to ensure the accuracy and integrity of the signals.

[0071] The processed temperature signal is transmitted to the display screen 20 at the rear of the connector 11 via a wired cable or a wireless module (such as Bluetooth or Wi-Fi). After receiving the signal, the display screen 20 decodes and displays the temperature data of each part in a digital or graphical form through the display driver circuit.

[0072] Staff can check the temperature data on the display screen 20 regularly or at any time. If an abnormal temperature rise is found in a certain part, corresponding measures can be taken in time, such as checking the equipment operation status and troubleshooting potential faults, so as to ensure the safe and stable operation of each chamber in the medium-voltage cabinet of the photovoltaic power station.

[0073] (5) Maintenance and inspection:

[0074] Regularly check the condition of the rubber ring 9, and replace it in time if it is aged or damaged, in order to ensure the shock absorption and sealing performance of the device.

[0075] Check the movement of the folding plate 5 to ensure that the arc spring and the movable shaft are working properly and that the unused temperature measuring tank 3 is effectively covered.

[0076] Clean the display screen 20 regularly to ensure clear display; at the same time, check the electrical connections of the entire device to ensure stable signal transmission.

[0077] The thermometer 4 should be calibrated as needed based on actual usage to ensure the accuracy of temperature measurements.

[0078] In use, the temperature measuring frame 1 and the connecting frame 11 are connected by two outwardly expanding arc-shaped ring plates 15, which are inserted into the groove opening 19. The movement of the embedded groove 16, sliding rod 17, and limiting spring 18 inside the two arc-shaped ring plates 15 pushes the two arc-shaped ring plates 15 to lock into the inner end of the connecting frame 11, forming a ring that can rotate along the groove opening 19 inside the connecting frame 11. At this time, the threaded rod 12 at the front end of the connecting frame 11 and the threaded groove 10 at the rear end of the temperature measuring frame 1 are connected to each other. Rotation continues until the rubber rings 9 on their respective surfaces are in contact with the instrument compartment partition 2. Then, as needed, the required thermometers 4 are inserted sequentially along the temperature measuring groove 3. The lower end of the thermometer 4 is inserted into the hot-swappable port in the temperature measuring groove 3, so that the thermometer 4 and the temperature measuring frame are connected. 1. Overall signal connection: The outer end of each thermometer 4 is magnetically connected to each medium-pressure cabinet chamber via a retractable temperature measurement line 7 that can be elastically stretched outwards and a chamber temperature sensing coil 8. Unused temperature measurement slots 3 are covered by spring reel 6 to prevent dust from entering the hot-swappable port. After complete installation, the main power cord on the temperature measuring frame 1 is connected to the power plug in the instrument room (similar to the power supply part of a computer host, which has many structures to facilitate connection and power supply to various devices). Thus, during operation, the temperature of each chamber is monitored. At the same time, the contraction movement of the rear linkage spring 14 prevents the temperature measuring frame 1 from loosening with the connecting frame 11. The rubber ring 9 is used to minimize vibration.

[0079] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. An online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station, comprising a thermometer (4), characterized in that, The thermometer (4) is provided with a temperature measuring groove (3) at its outer end. The temperature measuring groove (3) is provided with a temperature measuring frame (1) at its outer end. The temperature measuring frame (1) is provided with a connecting frame (11) at its rear end. The connecting frame (11) and the temperature measuring frame (1) are provided with an instrument chamber partition (2) for installation. The thermometer (4) and the temperature measuring groove (3) are provided with a hot-swappable port. The thermometer (4) is provided with a spring reel (6) at its inner end. The spring reel (6) is wound with a winding temperature measuring line (7) at its outer end. The winding temperature measuring line (7) is provided with a chamber temperature sensing coil (8) at its tail end. The temperature measuring groove (3) is provided with a folding plate (5) at its outer end. The temperature measuring frame (1) and the connecting frame (11) are respectively provided with rubber rings (9) between them and the instrument chamber partition (2).

2. The online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station according to claim 1, characterized in that, The rear end of the temperature measuring frame (1) is provided with a ventilation groove (21), a threaded groove (10) and an annular groove (13) extending outward from the center. The inner end of the threaded groove (10) is provided with a threaded rod (12), which is fixedly connected to the connecting frame (11). The inner end of the annular groove (13) is provided with two sets of linkage springs (14), and the outer end of each set of linkage springs (14) is connected to a set of arc-shaped ring plates (15).

3. The online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station according to claim 2, characterized in that, The outer end of the arc-shaped ring plate (15) is provided with a groove (19), which is embedded in the inner surface of the connecting frame (11). An embedding groove (16), a sliding rod (17) and a limiting spring (18) are provided between the two sets of arc-shaped ring plates (15). The rear end of the connecting frame (11) is provided with a display screen (20).

4. The online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station according to claim 3, characterized in that, The temperature measuring frame (1) is movably connected to the connecting frame (11) through the mounting holes on the instrument compartment partition (2). The number of temperature measuring slots (3) is set to several groups, and the temperature measuring slots (3) are arranged in a ring array along the temperature measuring frame (1). The temperature measuring frame (1) and the connecting frame (11) are respectively attached to the instrument compartment partition (2) by rubber rings (9) for shock absorption.

5. The online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station according to claim 4, characterized in that, The folding plate (5) moves along the outer end of the temperature measuring groove (3). The two ends of the folding plate (5) are provided with arc-shaped grooves. The arc-shaped grooves are embedded in the outer side of the temperature measuring groove (3). The arc-shaped grooves are movably connected to the folding plate (5). The two ends of the folding plate (5) are provided with multiple sets of movable shafts. The movable shafts slide along the arc-shaped grooves.

6. The online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station according to claim 5, characterized in that, The ventilation slot (21) runs through the temperature measuring frame (1) and the connecting frame (11). The annular groove (13) is embedded in the inner surface of the rear end of the ventilation slot (21). The inner end of the annular groove (13) is fixedly connected to one end of the linkage spring (14). The other end of the linkage spring (14) is fixedly connected to the corresponding arc-shaped ring plate (15).

7. The online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station according to claim 6, characterized in that, The arc-shaped ring plates (15) are slidably connected between the embedded groove (16) and the slide rod (17), and the two ends of the limiting spring (18) are fixed in the slide rod (17) and the embedded groove (16).

8. The online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station according to claim 7, characterized in that, The hot-swappable port connects to the assembly of the temperature measuring frame (1). The hot-swappable port and the chamber temperature measuring sensor coil (8) transmit signals through the winding temperature measuring line (7). The chamber temperature measuring sensor coil (8) is attached to the top of each chamber. The chamber temperature measuring sensor coil (8) is wirelessly connected to the sensor in the medium-pressure cabinet chamber.

9. The online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station according to claim 8, characterized in that, Signal transmission between the assembly of the temperature measuring frame (1) and the display screen (20) at the rear end.

10. The online temperature monitoring device for medium-voltage switchgear in a photovoltaic power station according to claim 9, characterized in that, The arc-shaped groove is equipped with multiple sets of arc-shaped springs, and the arc-shaped springs connect two adjacent sets of movable shafts.

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