A ring main unit with multi-source state perception interlocking protection function

Abstract

The application relates to the technical field of ring network cabinets, and provides a ring network cabinet with a multi-source state sensing interlocking protection function. The ring network cabinet comprises a shell, a forced air cooling module in communication with the inside of the shell is arranged on the shell, a plurality of cabinet bodies are arranged in the shell, sensors are arranged on the cabinet bodies, gaps exist between the cabinet bodies located on the two sides and the shell, air inlets are arranged on the cabinet bodies, two groups of air outlets are arranged on the cabinet bodies, the air outlets are in communication with adjacent air inlets, and air outlets are arranged on the cabinet bodies and are in communication with the air inlets on the cabinet bodies. The application comprises a plurality of air inlets and a plurality of air outlets to form a continuous air channel surrounding all the cabinet bodies, air is sequentially discharged into different cabinet bodies through a plurality of groups of air outlets, the temperature of all the cabinet bodies is balanced, the probability of fixed position state sensing errors caused by temperature differences between different cabinet bodies is reduced, and the accuracy of the interlocking protection function is ensured.

Description

Technical Field

[0001] This invention relates to the field of ring main unit technology, and in particular to a ring main unit with multi-source status sensing interlocking protection function. Background Technology

[0002] A ring main unit (RNB) is an electrical device that houses multiple sets of power transmission and distribution equipment within a metal or non-metal insulated cabinet. RNBs are primarily used for receiving and distributing electrical energy and are a crucial component of power distribution networks. With the continuous advancement of smart grid construction, the status monitoring and fault early warning of RNBs have become increasingly important. Current technologies collect status parameters of each device within the RNB and its environment to sense the multi-source status within the RNB, thereby triggering corresponding interlocking protection in unexpected situations. However, existing RNB status sensing and interlocking protection technologies still have the following shortcomings:

[0003] Ring main unit (RNU) enclosures typically contain multiple cabinets (power transmission and distribution equipment cabinets). Due to differences in internal component layout, load variations, and regional temperature and humidity, the temperature distribution often differs between these cabinets. In existing RNUs, status sensing modules (such as temperature sensors and humidity sensors) are usually installed in fixed locations, providing accurate local status sensing near the installation point. However, when there are temperature and humidity differences between different cabinets, the fixed-location status sensing modules cannot accurately reflect the overall status of the RNU, easily leading to status sensing errors and "false normal" phenomena, which in turn affects the accuracy of interlocking protection function triggering. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the background art, the present invention provides a ring main unit with multi-source state-sensing interlocking protection function.

[0005] The technical implementation of this invention is as follows: A ring main unit with multi-source state sensing interlocking protection function includes an outer shell, an air-cooled module connected to the interior of the outer shell, several cabinets spaced apart inside the outer shell, sensors installed in each cabinet, gaps between the cabinets on both sides and the outer shell, an air inlet duct in each cabinet, two sets of exhaust vents centrally symmetrically distributed in each cabinet, each set of exhaust vents having several arranged in a rectangular array, the exhaust vents being connected to adjacent air inlets, and symmetrically distributed exhaust ducts connected to the air inlets above each cabinet. All the air inlets and exhaust ducts together form a continuous air duct for guiding airflow within all the cabinets.

[0006] Furthermore, it is particularly preferred that the bottom of the outer casing is provided with a water-cooling pipe, the water-cooling pipe being provided with a first heat-conducting part and a plurality of second heat-conducting parts spaced apart, the number of the second heat-conducting parts being the same as the number of the cabinet.

[0007] Furthermore, it is particularly preferred that the cabinet is fixedly connected to a guide shell that extends into the air inlet duct, and the second heat-conducting part passes through an adjacent guide shell.

[0008] Furthermore, it is particularly preferred that the cabinet body is fixedly connected to a centrally symmetrically distributed partition, the cabinet body is connected to an exhaust pipe, the exhaust pipe is located between adjacent centrally symmetrically distributed partitions, the partitions divide the internal space of the cabinet body into a serpentine channel, and the two sets of exhaust holes are located at the two ends of the serpentine channel respectively.

[0009] Furthermore, it is particularly preferred that the exhaust pipe is connected to a connecting pipe, the sensor is fixedly connected to the connecting pipe, and the sensor passes through the connecting pipe.

[0010] Furthermore, it is particularly preferred that the cabinet is provided with two symmetrically distributed sets of airflow holes, each set of airflow holes having several arranged in a rectangular array, the airflow holes being connected to the adjacent air inlet duct, and the airflow holes gradually sloping downwards from the distance away from the central axis of the cabinet to the distance closer to it.

[0011] Furthermore, it is particularly preferred that the cabinet is rotatably connected to two symmetrically distributed sets of rotating plates, each set of rotating plates having several spaced-apart plates, and the several rotating plates in the same set are respectively used to block several airflow holes in adjacent sets, and a torsion spring is fixedly connected between the rotating plates and the cabinet.

[0012] Furthermore, it is particularly preferred that a valve body is installed between the exhaust pipe and the connecting pipe, the valve body is rotatably connected to a valve core, both the valve body and the valve core are used to connect adjacent exhaust pipes and adjacent connecting pipes, the valve core is fixedly connected to a gear, the outer shell is slidably connected to an electric slide rod, the electric slide rod is fixedly connected to a rack of the same number as the valve body, and the rack is used to drive the corresponding gear.

[0013] Furthermore, it is particularly preferred that the distance between the different racks and the corresponding gears is different.

[0014] Furthermore, it is particularly preferred that a telescopic rod is fixedly connected inside the valve core, the telescopic rod is provided with thermally expanding gas, and the telescopic part of the telescopic rod is fixedly connected to a sliding block that is slidably connected inside the valve core.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention forms a continuous air duct surrounding all cabinets by multiple air inlets and multiple air outlets, and discharges the airflow into different cabinets through multiple sets of exhaust holes in sequence, so as to equalize the temperature of all cabinets, thereby reducing the probability of fixed position status perception error caused by temperature differences between different cabinets, and thus ensuring the accuracy of interlock protection function triggering.

[0016] 2. The first heat-conducting part exchanges heat with the soil to cool the coolant, thereby reducing the energy consumption for cooling the cabinet. The second heat-conducting part cools the airflow flowing through the guide shell, and the desiccant inside the guide shell dries the airflow, thereby cooling and drying the inside of the cabinet.

[0017] 3. By using multiple partitions to guide the airflow inside the cabinet, the temperature inside the cabinet is made more even, reducing the probability of incorrect status perception in a single cabinet due to different temperatures and humidity at different heights and positions inside the cabinet. Furthermore, the airflow is directly guided to the sensor, so that the mixed airflow inside the cabinet passes through the sensor in real time, improving the accuracy of status perception inside the cabinet and ensuring the accuracy of interlock protection function triggering.

[0018] 4. By continuously adjusting the exhaust volume of the exhaust pipe, the airflow inside all cabinets is discharged intermittently and alternately. The residence time of the airflow inside the cabinet at different temperatures is controlled to improve the heat exchange effect of the airflow inside the cabinet under different conditions. As the exhaust volume of the exhaust pipe changes in real time, the exhaust volume of the airflow hole also changes continuously, causing the rotating plate to automatically rotate. The rotation of the rotating plate guides the airflow discharged from the airflow hole, causing the airflow to sweep up and down, improving the airflow flow inside the cabinet and enhancing the heat exchange efficiency when cooling the cabinet. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the outer casing and air-cooling module of the present invention; Figure 3 This is a three-dimensional structural diagram of the water-cooling pipe and the flow-guiding shell of the present invention; Figure 4 This is a three-dimensional sectional view of the cabinet body of the present invention; Figure 5 This is a three-dimensional structural diagram of the rotating plate of the present invention; Figure 6 This is a three-dimensional structural diagram of the exhaust pipe of the present invention; Figure 7 This is a three-dimensional structural diagram of the valve body and valve core of the present invention; Figure 8 This is a three-dimensional structural cross-sectional view of the valve body and valve core of the present invention.

[0020] In the diagram: 1. Outer shell, 2. Air-cooled module, 3. Cabinet, 4. Air inlet duct, 401. Exhaust vent, 5. Exhaust duct, 6. Water-cooled pipe, 601. First heat-conducting part, 602. Second heat-conducting part, 7. Guide shell, 8. Partition plate, 9. Exhaust pipe, 10. Connecting pipe, 11. Sensor, 12. Airflow hole, 13. Rotating plate, 14. Valve body, 15. Valve core, 16. Gear, 17. Electric slide bar, 18. Rack, 19. Telescopic rod, 20. Sliding block. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1

[0023] A ring main unit with multi-source state-aware interlocking protection function, such as Figures 1-5As shown, the system includes an outer casing 1, on which a control terminal (not shown) is installed. The outer casing 1 also houses a cooling module 2 connected to its interior, electrically connected to the control terminal. The cooling module 2 supplies airflow to the interior of the outer casing 1 to cool its interior. Inside the outer casing 1 are several cabinets 3 spaced apart. Each cabinet 3 is equipped with sensors 11 electrically connected to the control terminal. These sensors 11 can be temperature sensors, humidity sensors, or other status sensors. Gaps exist between the cabinets 3 on the left and right sides and the outer casing 1. Each cabinet 3 has an air inlet duct 4 and two sets of centrally symmetrically distributed exhaust vents 401. Each set of exhaust vents 401 contains several vents arranged in a rectangular array. The exhaust vents 401 are connected to adjacent air inlets 4. The cabinet 3 also has two exhaust ducts 5 symmetrically distributed front and back, each connected to its upper air inlet duct 4. Both ends are equipped with flared openings. The front and rear lengths of the flared opening at the air inlet of the air inlet duct 4 cover the right ends of the two corresponding exhaust ducts 5. The flared opening at the exhaust of the air inlet duct 4 also connects to the two exhaust ducts 5 within the same cabinet 3. All air inlets ducts 4 and all exhaust ducts 5 together form a continuous air duct, which is used to guide the airflow within all cabinets 3. Through multiple air inlets ducts 4 and multiple exhaust ducts 5 forming a continuous air duct surrounding all cabinets 3, the airflow is sequentially discharged into different cabinets 3 through multiple sets of exhaust holes 401, balancing the temperature of all cabinets 3. This reduces the probability of incorrect fixed-position status perception (such as temperature and humidity) due to temperature differences between different cabinets 3 (i.e., because the installation position of the status perception module is fixed, but the status of cabinets 3 in different positions is different, the status perception module may misperceive the overall status of the cabinet 3, resulting in a false normal phenomenon), thereby ensuring the accuracy of the interlock protection function triggering.

[0024] like Figures 2-4As shown, a water-cooling pipe 6 is installed at the bottom of the outer casing 1. A circulation pump (not shown in the figure) is also installed on the outer casing 1. The circulation pump is an existing structure and is electrically connected to the control terminal. The circulation pump supplies coolant to the water-cooling pipe 6, allowing the coolant to circulate within the pipe. The water-cooling pipe 6 has a first heat-conducting part 601 and several spaced-apart second heat-conducting parts 602. During the use of this device, the first heat-conducting part 601 is buried underground. Utilizing the high specific heat capacity and low heat conduction efficiency of the soil, which results in a constant internal temperature, the coolant flowing through the first heat-conducting part 601 is cooled, reducing the energy consumption for cooling the cabinet 3. The number of second heat-conducting parts 602 is the same as that of the cabinet 3. The number of cabinets is the same. Each cabinet 3 is fixedly connected to a guide shell 7 that penetrates into the air inlet duct 4. The guide shell 7 is equipped with a desiccant (such as activated carbon) to keep the airflow passing through the guide shell 7 dry, thereby reducing the humidity during the cooling process of the cabinet 3 and ensuring the safety of the ring main unit operation. The second heat conduction part 602 passes through the adjacent guide shell 7. During the process of the airflow passing through all cabinets 3, the first heat conduction part 601 exchanges heat with the soil to cool the coolant, and the second heat conduction part 602 cools the airflow passing through the guide shell 7, thereby cooling the cabinet 3. The airflow is cooled once when it passes through each cabinet 3 to ensure the cooling effect of the airflow on the cabinets 3 deep inside.

[0025] like Figure 4 and Figures 6-8 As shown, two centrally symmetrically distributed partitions 8 are fixed inside the cabinet 3. Each partition 8 has several through holes and notches for electrical components and wiring to pass through, facilitating their installation. The cabinet 3 is connected to an exhaust pipe 9, located between adjacent centrally symmetrically distributed partitions 8. The partitions 8 divide the interior space of the cabinet 3 into a serpentine channel. The airflow within the cabinet 3 is guided by multiple partitions 8, flowing along the serpentine channel to achieve a more even temperature distribution throughout the cabinet 3, reducing temperature and humidity variations caused by differences in height and location within the cabinet 3. The probability of incorrect state perception within a single cabinet 3 is reduced, ensuring the accuracy of interlock protection function triggering. Two sets of exhaust vents 401 are located at the two ends of the serpentine channel. The exhaust pipe 9 is connected to the connecting pipe 10. In this embodiment, the exhaust pipe 9 is fixedly connected to the adjacent connecting pipe 10, and the sensor 11 is fixedly connected to the connecting pipe 10. The sensor 11 passes through the connecting pipe 10. Furthermore, by placing the sensor 11 on the connecting pipe 10, the airflow is discharged through the exhaust pipe 9 and the connecting pipe 10, so that the mixed airflow inside the cabinet 3 passes through the sensor 11 in real time, improving the accuracy of state perception within the cabinet 3.

[0026] The specific workflow is as follows:

[0027] When the operator needs to use this device to supply power, if the device needs to be cooled, the air-cooling module 2 is turned on through the control terminal. The air-cooling module 2 supplies airflow into the outer shell 1. The airflow passes through the continuous air duct formed by all the air inlets 4 and all the air outlets 5. As the airflow passes through all the air inlets 4, it passes through multiple sets of exhaust holes 401 and is discharged into different cabinets 3 in sequence, so as to equalize the temperature of all cabinets 3. This reduces the probability of incorrect fixed position status perception (such as temperature and humidity) due to temperature differences between different cabinets 3 (that is, because the installation position of the status perception module is fixed, but the status of cabinets 3 in different positions is different, the status perception module will perceive the overall status of cabinets 3 incorrectly, resulting in a false normal phenomenon). This ensures the accuracy of the interlock protection function triggering.

[0028] When the air-cooled module 2 is turned on, the circulation pump is started through the control terminal. The coolant in the first heat conduction part 601 exchanges heat with the soil during the flow process, which cools the coolant. The coolant passes through all the second heat conduction parts 602. When the airflow passes through each cabinet 3, one of the first heat conduction parts 601 cools the airflow once to ensure the cooling effect of the airflow on the deep cabinet 3. At the same time, the desiccant in the guide shell 7 dries the airflow flowing through the guide shell 7 to reduce the humidity of the cabinet 3 during the cooling process and ensure the safety of the ring main unit operation.

[0029] When the airflow enters the cabinet 3 through the exhaust vent 401, the partition 8 guides the airflow within the cabinet 3. The airflow flows along the serpentine channel within the cabinet 3, ensuring a uniform temperature throughout the cabinet 3. This reduces the probability of incorrect state perception within a single cabinet 3 due to variations in temperature and humidity at different heights and locations within the cabinet 3, thus ensuring the accuracy of interlocking protection function triggering. Furthermore, by placing the sensor 11 on the connecting pipe 10, the airflow exits from the exhaust pipe 9 and the connecting pipe 10 after passing through the serpentine channel. This allows the mixed airflow within the cabinet 3 to pass through the sensor 11 in real time, improving the accuracy of state perception within the cabinet 3. This ensures the accuracy of the ring main unit's protection function activation (e.g., when the temperature and humidity inside the ring main unit are unbalanced, the heater and other protection functions are activated to ensure that the temperature of the internal components is higher than the ambient air dew point temperature, and to prevent moisture from entering the ring main unit, thereby preventing condensation and reducing the probability of false triggering of other interlocking protection functions due to condensation affecting air insulation performance).

[0030] When the device no longer needs cooling, the air-cooling module 2 and the circulating pump are turned off via the control terminal.

[0031] Example 2

[0032] Based on Example 1, such as Figures 4-6As shown, the cabinet 3 is provided with two sets of airflow holes 12 symmetrically distributed on the left and right sides. Each set of airflow holes 12 has several holes arranged in a rectangular array. The airflow holes 12 are connected to the adjacent air inlet duct 4. The airflow holes 12 are used to deliver airflow to the corresponding cabinet 3. The airflow holes 12 gradually slope downward from the distance from the central axis of the cabinet 3 to the distance from the central axis, so that the cold air compresses the hot air inside the cabinet 3 downward, thereby enhancing the heat exchange efficiency when cooling the inside of the cabinet 3. The cabinet 3 is rotatably connected to two sets of symmetrically distributed rotating plates 13. Each set of rotating plates 13 has several holes arranged at intervals. Several rotating plates 13 in the same group are used to block several airflow holes 12 in adjacent groups. A torsion spring is fixed between the rotating plate 13 and the cabinet 3. In this embodiment, by continuously controlling the air force discharged by the air-cooling module 2 and continuously adjusting the jet force of the airflow hole 12, the rotating plate 13 is rotated back and forth. The torsion spring between the rotating plate 13 and the cabinet 3 is correspondingly torsional and deformed. The rotation of the rotating plate 13 guides the airflow discharged from the airflow hole 12, making the airflow sweep up and down, improving the airflow flow in the cabinet 3, and enhancing the heat exchange efficiency when cooling the cabinet 3.

[0033] Example 3

[0034] Based on Example 2, such as Figures 6-8As shown, in the above embodiment, the exhaust pipe 9 is fixedly connected to the adjacent connecting pipe 10. In this embodiment, a valve body 14 is installed between the exhaust pipe 9 and the connecting pipe 10. The valve body 14 is rotatably connected to a valve core 15. Both the valve body 14 and the valve core 15 are used to connect the adjacent exhaust pipe 9 and the adjacent connecting pipe 10. The valve core 15 is fixedly connected to a gear 16. The outer shell 1 is slidably connected to an electric slide rod 17 that is electrically connected to a control terminal. The electric slide rod 17 is fixedly connected to a rack 18 with the same number as the valve body 14. The racks 18 are used to drive the corresponding gears 16. The distance between different racks 18 and the corresponding gears 16 is different. The electric slide rod 17 drives the corresponding gears 16. The different racks 18 are driven to move back and forth, so that the different racks 18 move sequentially to mesh with the corresponding gears 16, thereby driving the different gears 16 to rotate the valve core 15 in turn. Different exhaust pipes 9 are connected to adjacent connecting pipes 10 in turn, thereby continuously adjusting the exhaust volume of the exhaust pipes 9, so that the airflow in all cabinets 3 is discharged alternately and intermittently. By controlling the moving speed and frequency of the electric slide bar 17, the frequency and speed of the airflow being discharged alternately and intermittently in all cabinets 3 are adjusted, and the residence time of the airflow in the cabinet 3 at different temperatures is controlled, thereby improving the heat exchange effect of the airflow in the cabinet 3 under different conditions. A telescopic rod 19 is fixedly connected inside the valve core 15. Both the valve core 15 and the upper part of the telescopic rod 19 are equipped with exhaust channels, allowing the upper part of the telescopic rod 19 to communicate with the external environment. The lower part of the telescopic rod 19 contains thermally expanding gas. A sliding block 20, which is slidably connected to the telescopic part of the telescopic rod 19, is fixedly connected to the valve core 15. Both the telescopic part of the telescopic rod 19 and the sliding block 20 are made of thermally conductive material. When the temperature inside a single cabinet 3 rises, the thermally expanding gas inside the telescopic rod 19 expands, causing the telescopic part of the telescopic rod 19 to contract and move the sliding block 20 upwards, increasing the flow rate inside the valve core 15. When the temperature inside a single cabinet 3 decreases, the gas inside the telescopic rod 19... The thermal expansion and contraction of the gas causes the telescopic part of the telescopic rod 19 to extend and drive the sliding block 20 to move downward, reducing the flow rate inside the valve core 15. This allows for individual temperature control of different individual cabinets 3 to ensure the stability of the ring main unit's working environment. In the above embodiment, by continuously controlling the air force discharged from the air-cooling module 2 and continuously adjusting the jet force of the airflow hole 12, the rotating plate 13 is made to rotate back and forth. In this embodiment, it is not necessary to continuously control the air force discharged from the air-cooling module 2. During the reciprocating rotation of the valve core 15, the exhaust volume of the exhaust pipe 9 can be adjusted, thereby changing the exhaust volume of the airflow hole 12 and causing the rotating plate 13 to rotate automatically.

[0035] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A ring main unit having a multi-source state-aware interlocking protection function, characterized in that, The device includes an outer shell (1), which is equipped with a wind-cooling module (2) connected to its interior. Inside the outer shell (1), several cabinets (3) are installed at intervals. Each cabinet (3) is equipped with a sensor (11). There are gaps between the cabinets (3) on both sides and the outer shell (1). Each cabinet (3) is equipped with an air inlet duct (4). Each cabinet (3) is equipped with two sets of centrally symmetrically distributed exhaust holes (401). Each set of exhaust holes (401) has several holes arranged in a rectangular array. Each exhaust hole (401) is connected to the adjacent air inlet duct (4). Each cabinet (3) is equipped with symmetrically distributed exhaust ducts (5) that are all connected to the air inlet ducts (4) above it. All the air inlet ducts (4) and all the exhaust ducts (5) together form a continuous air duct for guiding the airflow in all the cabinets (3).

2. The ring main unit having the multi-source state sensing interlocking protection function according to claim 1, characterized in that, The bottom of the outer shell (1) is provided with a water-cooling pipe (6), the water-cooling pipe (6) is provided with a first heat-conducting part (601) and a plurality of second heat-conducting parts (602) spaced apart, the number of the second heat-conducting parts (602) is the same as the number of the cabinet (3).

3. The ring main unit having the multi-source state sensing interlocking protection function according to claim 2, characterized in that, The cabinet (3) is fixedly connected to a flow guide shell (7) that passes through the air inlet duct (4), and the second heat conduction part (602) passes through the adjacent flow guide shell (7).

4. The ring main unit having the multi-source state sensing interlocking protection function according to claim 3, characterized in that, The cabinet (3) is fixed with partitions (8) that are centrally symmetrically distributed inside. The cabinet (3) is connected to an exhaust pipe (9). The exhaust pipe (9) is located between adjacent partitions (8) that are centrally symmetrically distributed. The partitions (8) divide the space inside the cabinet (3) into a serpentine channel. Two sets of exhaust holes (401) are located at the two ends of the serpentine channel, respectively.

5. The ring main unit having the multi-source state sensing interlocking protection function according to claim 4, characterized in that, The exhaust pipe (9) is connected to a connecting pipe (10), and the sensor (11) is fixedly connected to the connecting pipe (10). The sensor (11) passes through the connecting pipe (10).

6. A ring main unit with multi-source state-sensing interlocking protection function as described in claim 1, characterized in that, The cabinet (3) is provided with two sets of airflow holes (12) symmetrically distributed. Each set of airflow holes (12) has several holes distributed in a rectangular array. The airflow holes (12) are connected to the adjacent air inlet duct (4). The airflow holes (12) gradually slope downward from the distance away from the central axis of the cabinet (3) to the distance closer to it.

7. A ring main unit with multi-source state-sensing interlocking protection function as described in claim 6, characterized in that, The cabinet (3) is rotatably connected to two sets of symmetrically distributed rotating plates (13). Each set of rotating plates (13) has several plates spaced apart. Several rotating plates (13) in the same set are used to block several airflow holes (12) in adjacent sets. A torsion spring is fixed between the rotating plate (13) and the cabinet (3).

8. A ring main unit with multi-source state-sensing interlocking protection function as described in claim 5, characterized in that, A valve body (14) is installed between the exhaust pipe (9) and the connecting pipe (10). The valve body (14) is rotatably connected to a valve core (15). Both the valve body (14) and the valve core (15) are used to connect the adjacent exhaust pipe (9) and the adjacent connecting pipe (10). The valve core (15) is fixedly connected to a gear (16). The outer shell (1) is slidably connected to an electric slide rod (17). The electric slide rod (17) is fixedly connected to a rack (18) with the same number as the number of racks in the valve body (14). The rack (18) is used to drive the corresponding gear (16).

9. A ring main unit with multi-source state-sensing interlocking protection function as described in claim 8, characterized in that, The distance between the different racks (18) and the corresponding gears (16) is different.

10. A ring main unit with multi-source state-sensing interlocking protection function as described in claim 8, characterized in that, A telescopic rod (19) is fixedly connected inside the valve core (15). A thermally expanding gas is provided inside the telescopic rod (19). A sliding block (20) is fixedly connected to the telescopic part of the telescopic rod (19) and is slidably connected inside the valve core (15).

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