Intelligent explosion-proof power distribution cabinet applied to intelligent power distribution system

Abstract

The application belongs to the technical field of intelligent power distribution system, and particularly relates to an intelligent explosion-proof power distribution cabinet applied to an intelligent power distribution system, which comprises a power distribution cabinet body and a safety valve. The power distribution cabinet body comprises a cabinet body and a cabinet door, and the safety valve comprises a valve body, a valve pipe, a first limiting piece, an abutting piece, a force sensor, a piston and a second limiting piece. The valve body is provided with first and second assembly grooves, and an air inlet and a first air outlet are communicated with the first assembly groove. When the cabinet door is closed, the valve pipe is slid to align the second air outlet with the first air outlet, gas enters the cabinet body, the force sensor is extruded by the piston through the second limiting piece, and pressure monitoring is realized; when the cabinet door is opened, the valve pipe is slid to close the air outlet to prevent gas leakage, the force sensor is retreated to the front side of the second limiting piece, and the state change of the force sensor feeds back the state of the cabinet door. The application realizes intelligent control of protection gas, cabinet door state monitoring and sensor protection through structural linkage, improves the safety, energy saving and intelligent level of the power distribution system, and is convenient to maintain.

Description

Technical Field

[0001] This invention belongs to the technical field of intelligent power distribution systems, specifically relating to an intelligent explosion-proof distribution cabinet applied to intelligent power distribution systems. In intelligent power distribution systems, the distribution cabinet, as a core facility for power distribution and control, is of paramount importance in terms of safety and stability. With the continuous development of smart grids, higher requirements are placed on the explosion-proof performance, intelligent monitoring, and energy efficiency of power distribution equipment. The intelligent explosion-proof distribution cabinet of this invention can effectively adapt to the complex environment of intelligent power distribution systems, providing a reliable guarantee for the safe and stable operation of the power system. Background Technology

[0002] In intelligent power distribution systems, distribution cabinets are critical facilities, and their operational status directly affects the energy efficiency and safety of the entire system. However, existing distribution cabinets used in intelligent power distribution systems face the following pressing issues in actual operation:

[0003] To ensure the normal operation of equipment inside distribution cabinets in complex environments, protective gases such as nitrogen are typically continuously supplied to isolate them from humid air and corrosive media. However, when the cabinet door is opened for maintenance, existing distribution cabinets lack an automatic mechanism to cut off the flow of protective gases, leading to continuous gas leakage. This not only results in a significant waste of protective gases and a substantial increase in operating costs, but also contradicts the energy-saving and consumption-reducing principles advocated by intelligent power distribution systems, thus weakening the economic feasibility of the system.

[0004] The core of an intelligent power distribution system lies in achieving precise management through real-time monitoring, and the cabinet door status is a key parameter reflecting the operating status of the distribution cabinet. Existing distribution cabinets generally lack effective means of monitoring the open / closed status of their doors, making it impossible for intelligent control systems to obtain accurate information on whether the doors are open in a timely manner. This makes it difficult for the system to dynamically adjust to special operating conditions after the doors are open, such as suspending unnecessary power supply or activating safety warnings, severely restricting the intelligent management level and emergency response capabilities of the power distribution system.

[0005] The intelligent explosion-proof distribution cabinet for intelligent power distribution systems involved in this invention can specifically solve the above-mentioned problems. Through innovative structural design, it realizes intelligent control of protective gas and accurate monitoring of cabinet door status, thereby comprehensively improving the energy efficiency, intelligence level and operational reliability of intelligent power distribution systems.

[0006] The methods described in this section are not necessarily methods that had been previously conceived or adopted. Unless otherwise specified, no method described in this section should be assumed to be prior art simply because it is included in this section. Similarly, unless otherwise specified, the issues mentioned in this section should not be considered to be accepted in any prior art. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing distribution cabinets used in intelligent power distribution systems by providing an intelligent explosion-proof distribution cabinet. Specifically, it aims to solve the problem of protective gas leakage during maintenance work when the cabinet door is opened, resulting in significant waste and increased operating costs. Through innovative structural design, it achieves intelligent control of the protective gas, automatically blocking the gas flow channel when the cabinet door is opened, avoiding unnecessary gas loss and meeting the energy-saving requirements of intelligent power distribution systems. Simultaneously, it addresses the lack of effective monitoring of the cabinet door status in existing distribution cabinets by using force sensor changes to accurately reflect the door's open / closed state. This allows the intelligent control system to obtain relevant information promptly and accurately, enabling dynamic adjustments and intelligent management and scheduling for special operating conditions after the cabinet door is opened, thereby improving the intelligence level and emergency response capability of the power distribution system.

[0008] To achieve the above objectives, one technical solution adopted by the present invention is:

[0009] An intelligent explosion-proof distribution cabinet for use in intelligent power distribution systems includes:

[0010] The main body of the distribution cabinet has a cabinet body and a cabinet door;

[0011] Safety valve, comprising:

[0012] The valve body is located inside the cabinet. Its front end, facing the cabinet door, has a first assembly slot and a second assembly slot that are interconnected at their rear ends. It has an air inlet and a first exhaust port that are connected to the first assembly slot. The first exhaust port is used to communicate with the inner cavity of the cabinet.

[0013] The valve tube, which is slidably and sealingly connected to the first assembly groove at both ends, has a second vent port;

[0014] A first limiting member is provided on the valve tube to limit the sliding stroke of the valve tube;

[0015] An abutment is provided at the front end of the valve tube and closes the front end of the valve tube;

[0016] A force sensor is disposed on the abutment member;

[0017] The piston, with its front and rear seals slidingly connected within the second assembly groove;

[0018] The second limiting member is disposed in the second assembly groove and is located in front of the piston;

[0019] When the cabinet is closed by the cabinet door and the front end of the abutting member abuts against the cabinet door, the second exhaust port will be aligned with the first exhaust port, and the rear end of the force sensor will pass through the second limiting member;

[0020] When the cabinet is not closed by the cabinet door and the valve pipe slides forward under external force until it is limited by the first limiting member, the second exhaust port will be closed by the inner wall of the first assembly slot, the first exhaust port will be closed by the outer wall of the valve pipe, and the force sensor will retract to the front side of the second limiting member.

[0021] Through the coordination of the cabinet and cabinet door, and the linkage of various components of the safety valve, the protective gas can be normally introduced into the cabinet when the cabinet door is closed, and the pressure can be monitored in real time by the force sensor, which meets the requirements of the intelligent power distribution system for accurate monitoring of the cabinet environment. When the cabinet door is opened, the gas channel is automatically closed to prevent the protective gas from leaking, and at the same time, the force sensor is removed from the pressurized state, which reduces gas waste and lowers operating costs, protects the force sensor, and provides feedback on the cabinet door status through its status changes, providing accurate information for the intelligent control system and improving the intelligent management level and energy efficiency of the power distribution system.

[0022] Furthermore, the valve body has a third vent that communicates with the first assembly slot, and the third vent is used to connect a pressure relief valve located on the outside of the cabinet.

[0023] The third exhaust port, in conjunction with the pressure relief valve, can quickly release pressure when the internal pressure of the cabinet rises abnormally, effectively avoiding the risk of the cabinet exploding due to excessive pressure, further enhancing the explosion-proof performance of the power distribution cabinet, providing dual protection for the safe operation of the intelligent power distribution system, and ensuring that the system can still work stably when there is a sudden pressure abnormality.

[0024] Furthermore, the third exhaust port is located on the side where the valve body is fitted to the inner wall of the cabinet. It is configured as an externally threaded tube that passes through the cabinet from the inside out and can be connected to an internally threaded fastening ring to fix the valve body to the cabinet.

[0025] The externally threaded tubular third exhaust port, in conjunction with the internally threaded fastening ring, not only serves as a pressure relief channel but also securely fixes the valve body to the cabinet, enhancing the stability and reliability of the valve body installation and preventing pressure relief or gas flow issues caused by valve body loosening. The through-cabinet installation method facilitates connection between the pressure relief valve and external pipelines, and its simple structure and easy operation reduce installation and maintenance difficulties, meeting the requirements of intelligent power distribution systems for robust equipment installation and ease of maintenance.

[0026] Furthermore, the valve body has a fourth exhaust port communicating with the second assembly slot, the fourth exhaust port being used to connect to a pneumatic switch control structure located on the main body of the distribution cabinet.

[0027] Furthermore, a limiting groove communicating with the first assembly groove is provided on the side of the valve body that is fitted to the inner wall of the cabinet, and the first limiting member is connected to the side of the valve pipe and extends into the limiting groove.

[0028] The limiting groove cooperates with the first limiting component to precisely limit the sliding stroke of the valve tube, preventing the valve tube from slipping out of the first assembly groove or exceeding the effective working range due to excessive sliding. This ensures that the second exhaust port on the valve tube is accurately aligned with the first exhaust port when the cabinet door is closed and reliably closed when the cabinet door is open, guaranteeing the accuracy of gas channel state switching. At the same time, the limiting groove on the side wall of the cabinet can prevent gas leakage. The compact structural design meets the high requirements of intelligent power distribution systems for component fitting precision.

[0029] Furthermore, the air inlet is located on the side where the valve body is fitted to the inner wall of the cabinet. It is configured as an externally threaded tube that passes through the cabinet from the inside out and can be connected to an internally threaded fastening ring to fix the valve body to the cabinet.

[0030] The externally threaded tubular air inlet not only provides a channel for protective gas to enter the first assembly slot, but also further strengthens the connection between the valve body and the cabinet through its cooperation with the internally threaded fastening ring, making the valve body installation more stable; the design that runs through the cabinet facilitates connection with external protective gas source pipelines, ensuring a stable gas supply, reducing the risk of leakage at the connection, and providing a guarantee for a continuous and stable protective gas environment inside the intelligent power distribution system cabinet.

[0031] Furthermore, the valve body has a sealing gasket on the side that is fitted to the inner wall of the cabinet.

[0032] The sealing gasket fills the gap between the valve body and the inner wall of the cabinet, significantly enhancing the sealing performance of the mating surfaces and preventing protective gas from leaking from the installation gaps between the valve body and the cabinet. This ensures stable gas pressure and effective utilization, reducing gas waste. At the same time, it prevents external humid air, dust, and other contaminants from entering the valve body and affecting the operation of components, improving the protection performance of the distribution cabinet and meeting the sealing reliability requirements of intelligent power distribution systems.

[0033] Furthermore, the valve pipe has at least two sets of annular sealing grooves on its circumferential surface. The two sets of annular sealing grooves are located on the front and rear sides of the second exhaust port, respectively, and annular sealing rings are installed in both sets of annular sealing grooves.

[0034] The annular sealing ring forms a multiple seal between the valve tube and the first assembly groove, effectively preventing the protective gas from leaking before and after the second exhaust port. This ensures that the gas only enters the cabinet along a predetermined path when the second exhaust port is aligned with the first exhaust port, or completely blocks the flow when the valve is closed. This improves the sealing reliability during the valve tube's sliding process, reduces gas loss, ensures the accuracy of pressure detection, and provides a reliable guarantee for the gas management of the intelligent power distribution system.

[0035] Furthermore, the piston circumferential surface has an annular sealing groove, and an annular sealing ring is fitted into each annular sealing groove.

[0036] The annular sealing ring enhances the sealing between the piston and the inner wall of the second assembly groove, preventing gas leakage from the side of the piston and ensuring that the gas pressure in the second assembly groove can effectively drive the piston to move, so that the piston accurately squeezes the force sensor to transmit pressure signals; ensuring the high efficiency and accuracy of pressure transmission, improving the reliability of the force sensor's detection accuracy, and meeting the high precision requirements of intelligent power distribution systems for pressure signal feedback.

[0037] Furthermore, the inner wall of the second assembly groove is provided with a retaining ring groove, and the second limiting member is configured as a retaining ring assembled in the retaining ring groove.

[0038] The snap ring, installed in the snap ring groove as a second limiting component, can reliably limit the maximum stroke of the piston sliding forward, avoiding excessive piston movement that could cause damage to the force sensor. The snap ring has a simple structure, is easy to install and disassemble, facilitates maintenance and replacement, and has a stable limiting effect, ensuring that the piston and force sensor are reliably separated when the cabinet door is opened, protecting the force sensor and maintaining its detection accuracy, extending its service life, and reducing the maintenance cost of the intelligent power distribution system.

[0039] The intelligent explosion-proof distribution cabinet of the present invention, applied to intelligent power distribution systems, has the following significant advantages:

[0040] With superior explosion-proof performance, the system ensures safe operation. The cabinet is constructed of high-strength steel, and the cabinet door is reliably sealed by bolts or hinges with locks. Combined with the pressure regulation mechanism of the safety valve, a three-dimensional explosion-proof system is formed. When the internal pressure of the cabinet rises abnormally, the pressure relief valve connected to the third exhaust port can quickly release the pressure. The cooperation between the first and second exhaust ports can precisely control the flow of protective gas, preventing the intrusion of flammable and explosive gases from the outside through a positive pressure environment, and promptly reducing pressure in case of overpressure, providing all-weather safety protection for the core equipment of the intelligent power distribution system.

[0041] With outstanding energy-saving characteristics, it reduces system operating costs. Through a linkage structure between the valve pipe and the first assembly slot, intelligent linkage between the cabinet door opening / closing status and the gas passage is achieved. When the cabinet door is closed, the second exhaust port precisely aligns with the first exhaust port, ensuring efficient flow of protective gas into the cabinet; when the cabinet door is open, the valve pipe automatically seals the gas passage, preventing unnecessary leakage of protective gas. This design significantly reduces the loss of protective gases such as nitrogen, lowers the daily operation and maintenance costs of the intelligent power distribution system, and aligns with industry trends of energy conservation and emission reduction.

[0042] Intelligent monitoring upgrades enhance system management efficiency. Real-time linkage between force sensors and the intelligent control system enables dual monitoring functions: on the one hand, it accurately reflects the pressure status of the protective gas inside the cabinet, providing stable environmental parameters for the system; on the other hand, it provides real-time feedback on the cabinet door opening and closing status through abnormal changes in pressure data (the force sensor is not under pressure when the cabinet door is open), enabling the intelligent power distribution system to quickly respond to abnormal operating conditions of the cabinet, achieving remote monitoring and dynamic scheduling, and significantly improving the level of intelligent management of the system.

[0043] Optimized maintenance convenience reduces system downtime risk. When the cabinet door is opened, the valve pipe drives the contact piece and force sensor forward, allowing the force sensor to completely retract from the second assembly slot and be in a state free from external force constraints. This design allows personnel to directly inspect or replace the force sensor individually without disassembling core components such as the valve body and valve pipe, significantly shortening maintenance time, reducing the risk of downtime in the intelligent power distribution system due to equipment maintenance, and improving the system's continuous operation capability.

[0044] The reliable sealing system ensures operational stability. A multi-stage sealing system is formed by the annular seals on the valve tube and piston circumference, and the gasket between the valve body and the cabinet, ensuring no leakage of protective gas during transmission and regulation. This guarantees the accuracy of pressure detection data while maintaining the stability of the positive pressure environment within the cabinet. This high-sealing design provides a constant humidity and clean operating environment for intelligent power distribution equipment, reducing equipment failures caused by environmental fluctuations.

[0045] Precise structural design enhances system adaptability. The cooperation between the first limiting component and the limiting groove, and the second limiting component (circlip) and the circlip groove, enables precise control of the sliding stroke of the valve tube and piston, ensuring the stability and repeatability of gas channel switching and pressure transmission. This high-precision structural design allows the distribution cabinet to adapt to the pressure regulation requirements of different operating conditions in intelligent power distribution systems, improving the compatibility of equipment and systems.

[0046] In summary, this invention achieves an organic unity of explosion-proof, energy-saving, intelligent monitoring, and convenient maintenance through structural innovation, comprehensively improving the safety, economy, and intelligence level of intelligent power distribution systems, and providing key equipment support for the stable operation of the next-generation smart grid. Attached Figure Description

[0047] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0048] Figure 1 This is a schematic diagram of the structure of an embodiment of the intelligent explosion-proof power distribution cabinet of the present invention applied to an intelligent power distribution system;

[0049] Figure 2This is a cross-sectional structural schematic diagram of an embodiment of the intelligent explosion-proof power distribution cabinet of the present invention applied to an intelligent power distribution system;

[0050] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0051] Figure 4 This is a schematic diagram of the structure behind the hidden cabinet door of an embodiment of the intelligent explosion-proof distribution cabinet of the present invention applied to an intelligent power distribution system;

[0052] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0053] Figure 6 This is a schematic diagram of the valve body in one embodiment of the intelligent explosion-proof distribution cabinet of the present invention applied to an intelligent power distribution system;

[0054] Figure 7 This is a schematic diagram of the structure of the valve tube, the first limiting member, the abutment member, and the force sensor in an embodiment of the intelligent explosion-proof distribution cabinet of the present invention applied to an intelligent power distribution system.

[0055] The meanings of the labels in the attached diagram are as follows:

[0056] Distribution cabinet body 1, cabinet body 11, cabinet door 12, safety valve 2, valve body 21, first assembly slot 211, second assembly slot 212, snap ring slot 2121, air inlet 213, first exhaust port 214, third exhaust port 215, fourth exhaust port 216, limiting slot 217, sealing gasket 218, valve pipe 22, second exhaust port 221, first limiting component 23, abutment component 24, force sensor 25, piston 26, second limiting component 27. Detailed Implementation

[0057] The invention will now be further described with reference to the accompanying drawings.

[0058] Reference Figures 1-7 As shown, the intelligent explosion-proof distribution cabinet applied to the intelligent power distribution system in this embodiment includes a distribution cabinet body 1 and a safety valve 2.

[0059] In this embodiment, the cabinet body 11 of the distribution cabinet 1 is made of high-strength steel, which has good pressure resistance and impact resistance, and can provide reliable protection for the internal power distribution equipment. In this embodiment, the cabinet door 12 is sealed and fastened to the cabinet body 11 by multiple bolts (not shown in the figure), which can ensure the sealing and safety of the cabinet door 12 when closed. In addition, in other embodiments, a hinge connection can also be considered, and a lock can be installed on the cabinet door 12.

[0060] In this embodiment, the valve body 21 of the safety valve 2 is made of wear-resistant and corrosion-resistant metal material, and its shape is adapted to the inner wall of the cabinet 11, so that it can be tightly installed on the inner wall of the cabinet 11. The first mounting groove 211 and the second mounting groove 212 on the front end of the valve body 21 facing the cabinet door 12 are cylindrical grooves, and their rear ends are connected to each other to form an integral gas passage.

[0061] In this embodiment, the air inlet 213 is located on the side where the valve body 21 is fitted against the inner wall of the cabinet 11. It is configured as an externally threaded tube, which passes through the cabinet 11 from the inside to the outside and connects to an internally threaded fastening ring (not shown in the figure). By tightening the internally threaded fastening ring, the valve body 21 is firmly fixed to the cabinet 11. At the same time, the air inlet 213 is connected to a protective gas source (not shown in the figure, such as a nitrogen cylinder) through a pipe, and the protective gas can enter the first assembly slot 211 through the air inlet 213.

[0062] In this embodiment, the first exhaust port 214 is connected to the inner cavity of the cabinet 11. When the second exhaust port 221 is aligned with the first exhaust port 214, the protective gas can enter the inner cavity of the cabinet 11 from the first assembly slot 211 through the second exhaust port 221 and the first exhaust port 214, providing protection for the electrical equipment inside the cabinet 11 and preventing the equipment from being damaged by moisture, oxidation, etc. At the same time, it can form a positive pressure to prevent flammable and explosive gases from the outside from entering, thereby achieving an explosion-proof effect.

[0063] In this embodiment, the valve pipe 22 is a hollow tubular structure made of the same metal material as the valve body 21. Its outer diameter is adapted to the inner diameter of the first mounting groove 211, allowing it to slide back and forth within the first mounting groove 211 in a sealing manner. The second exhaust port 221 of the valve pipe 22 is a through hole formed on its circumference. When the valve pipe 22 slides to a specific position, the second exhaust port 221 aligns with the first exhaust port 214, enabling gas flow.

[0064] In this embodiment, at least two sets of annular sealing grooves on the circumference of the valve pipe 22 are located on the front and rear sides of the second exhaust port 221, respectively. The annular sealing rings installed in the annular sealing grooves are made of aging-resistant and high-pressure-resistant rubber material, which can fit tightly against the inner wall of the first assembly groove 211 and effectively prevent gas leakage between the valve pipe 22 and the first assembly groove 211.

[0065] In this embodiment, the first limiting member 23 is an internal hexagon bolt. A threaded hole is provided on the side of the valve tube 22, and the internal hexagon bolt is tightened into the threaded hole, with its end extending into the limiting groove 217 on the valve body 21. The limiting groove 217 is located along the sliding direction of the valve tube 22, and its length determines the sliding stroke of the valve tube 22. When the valve tube 22 slides forward, the first limiting member 23 moves within the limiting groove 217. When it reaches the front end of the limiting groove 217, the first limiting member 23 is stopped, thereby restricting the valve tube 22 from continuing to slide forward. When the valve body 21 is installed against the inner wall of the cabinet 11, the limiting groove 217 is sealed by the inner wall of the cabinet 11, ensuring that gas does not leak from the limiting groove 217.

[0066] In this embodiment, the abutment member 24 is made of rigid material and is in the shape of an elongated plate. It is fixed to the front end of the valve tube 22 by welding or threaded connection and seals the front end of the valve tube 22 to prevent gas from leaking from the front end of the valve tube 22.

[0067] In this embodiment, the force sensor 25 is a high-precision pressure sensor, which is fixed to the rear end face of the abutment member 24 by bolts (not shown in the figure), with its detection end facing the piston 26. The force sensor 25 is connected to the control system of the intelligent power distribution system through wires (not shown in the figure), which can transmit the detected pressure data to the control system in real time, so that the control system can monitor the pressure status inside the cabinet 11.

[0068] In this embodiment, the piston 26 is made of the same metal material as the valve body 21, and its outer diameter is adapted to the inner diameter of the second mounting groove 212, allowing it to slide back and forth within the second mounting groove 212 in a sealing manner. An annular sealing ring is fitted in the annular sealing groove on the circumference of the piston 26, which is also made of aging-resistant and high-pressure-resistant rubber material, ensuring the sealing between the piston 26 and the second mounting groove 212, so that the gas pressure can effectively drive the piston 26 to move.

[0069] In this embodiment, the snap ring groove 2121 on the inner wall of the second assembly groove 212 is an annular groove, and the second limiting member 27 is a snap ring. The snap ring is assembled in the snap ring groove 2121, and its inner diameter is slightly smaller than the outer diameter of the piston 26, which can limit the forward sliding stroke of the piston 26.

[0070] In this embodiment, the third vent 215 on the valve body 21 is located on the side that is fitted against the inner wall of the cabinet 11. It is an externally threaded tube that passes through the cabinet 11 from the inside out and is connected to an internally threaded fastening ring, further fixing the valve body 21 to the cabinet 11. The third vent 215 is connected to a pressure relief valve located on the outside of the cabinet 11 via a pipe. When the internal pressure of the cabinet 11 exceeds a set value, the pressure relief valve opens, and the excess gas is discharged through the third vent 215, reducing the internal pressure of the cabinet 11 and ensuring the safety of the distribution cabinet.

[0071] In this embodiment, the fourth exhaust port 216 is connected to the second assembly slot 212 and is connected to the pneumatic switch control structure located on the main body 1 of the distribution cabinet via a pipe. Gas in the second assembly slot 212 can enter the pneumatic switch control structure through the fourth exhaust port 216 to provide power for indirect control of the switch, such as pneumatically opening or closing the circuit breaker. It should be noted that the pneumatic switch control structure is prior art in this field and will not be described in detail here; for specific details, please refer to Chinese invention patent CN105914596B.

[0072] In this embodiment, the sealing gasket 218 on the side of the valve body 21 that is attached to the inner wall of the cabinet 11 is made of rubber material with good elasticity and strong sealing performance. Its shape is adapted to the mounting surface of the valve body 21, which can fill the gap between the valve body 21 and the inner wall of the cabinet 11, enhance the sealing performance between the two, and prevent gas leakage.

[0073] In this embodiment, when the cabinet 11 is closed by the cabinet door 12, the cabinet door 12 presses against the abutment member 24, causing the abutment member 24 to slide backward along the valve pipe 22 until the front end of the abutment member 24 is in close contact with the cabinet door 12. At this time, the second exhaust port 221 on the valve pipe 22 aligns with the first exhaust port 214 on the valve body 21. Protective gas enters the first assembly groove 211 from the air inlet 213, and then enters the inner cavity of the cabinet 11 through the second exhaust port 221 and the first exhaust port 214 to protect the internal equipment. Simultaneously, the rear end of the force sensor 25 passes through the second limiting member 27, and the piston 26 moves forward under the action of gas pressure and presses against the force sensor 25. The force sensor 25 transmits the detected pressure data to the intelligent control system, and the control system determines whether the protective gas pressure inside the cabinet 11 is normal based on the pressure data.

[0074] In this embodiment, when the cabinet door 12 needs to be opened for maintenance, the cabinet door 12 no longer presses against the abutment member 24. The valve pipe 22 slides forward under the action of gas pressure until the first limiting member 23 is limited by the limiting groove 217. At this time, the second exhaust port 221 on the valve pipe 22 is closed by the inner wall of the first assembly groove 211, and the first exhaust port 214 is closed by the outer wall of the valve pipe 22. Protective gas cannot be discharged from the first exhaust port 214 and the second exhaust port 221, avoiding gas waste. At the same time, the abutment member 24 slides the force sensor 25 forward, causing the force sensor 25 to retract to the front of the second limiting member 27. The piston 26 moves forward under the action of gas pressure and abuts against the second limiting member 27, and the force sensor 25 is no longer under pressure. Since the detection data of the force sensor 25 when it is not under pressure is significantly different from the data under normal working conditions, the intelligent control system can determine that the cabinet door 12 is in the open state based on this difference and promptly issue corresponding prompts or perform corresponding control operations, such as pausing certain unnecessary operating programs.

[0075] It is worth mentioning that in this embodiment, when the cabinet 11 is not closed by the cabinet door 12, the valve pipe 22 slides forward under gas pressure until it is stopped by the first limiting member 23. During this process, the abutment member 24 connected to the front end of the valve pipe 22 moves forward synchronously, thereby driving the force sensor 25 to slide forward, so that the force sensor 25 completely exits the second assembly slot 212 and is in front of the second limiting member 27. At this time, the force sensor 25 is no longer squeezed by the piston 26 and is also freed from the constraint of the second assembly slot 212, and is in a free state without external force. This structural design allows the staff to directly disassemble, replace or repair the force sensor 25 separately without disassembling other components such as the valve body 21 and valve pipe 22 during maintenance, which significantly simplifies the maintenance process, reduces maintenance time, improves the maintenance efficiency of the distribution cabinet in the intelligent power distribution system, and ensures that the force sensor 25 always maintains a good working condition, providing accurate pressure data for intelligent monitoring.

[0076] In this embodiment, when the maintenance is completed and the cabinet door 12 is closed again, the cabinet door 12 presses against the abutment member 24, causing the valve pipe 22, force sensor 25 and other components to move backward and reset. The second exhaust port 221 is aligned with the first exhaust port 214 again, and the protective gas re-enters the inner cavity of the cabinet 11. The force sensor 25 is squeezed by the piston 26 again, and the intelligent control system resumes normal monitoring of the internal pressure of the cabinet 11. The whole process does not require any additional operation and is convenient and quick to use.

[0077] In summary, the intelligent explosion-proof power distribution cabinet of this invention, through its reasonable structural design, organically combines explosion-proof, energy-saving, and intelligent monitoring functions, which can well meet the needs of intelligent power distribution systems and improve the safety, reliability, and intelligence level of power distribution systems.

[0078] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0080] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0082] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An intelligent explosion-proof distribution cabinet applied to an intelligent power distribution system, characterized in that... ,include: The main body of the distribution cabinet has a cabinet body and a cabinet door; Safety valve, comprising: The valve body is located inside the cabinet. Its front end, facing the cabinet door, has a first assembly slot and a second assembly slot that are interconnected at the rear end. It has an air inlet and a first exhaust port that are connected to the first assembly slot. The first exhaust port is used to communicate with the inner cavity of the cabinet. The valve tube, which is slidably and sealingly connected to the first assembly groove at both ends, has a second vent port; The first limiting element is provided on the valve tube to limit the sliding stroke of the valve tube; An abutment component is located at the front end of the valve tube and seals the front end of the valve tube. Force sensor, which is mounted on the contact part; The piston, with its front and rear seals slidingly connected in the second assembly groove; The second limiting member is located in the second assembly groove and is situated in front of the piston. When the cabinet is closed by the cabinet door and the front end of the abutment part abuts against the cabinet door, the second exhaust port will be aligned with the first exhaust port. The protective gas enters the first assembly slot from the air inlet, and then enters the inner cavity of the cabinet through the second exhaust port and the first exhaust port to protect the internal equipment. The rear end of the force sensor will pass through the second limiting part. The piston moves forward under the action of gas pressure and squeezes the force sensor. The force sensor transmits the detected pressure data to the system. The system determines whether the pressure of the protective gas inside the cabinet is normal based on the pressure data. When the cabinet is not closed by the cabinet door, the cabinet door no longer presses against the abutment, and the valve pipe slides forward under the action of gas pressure until it is limited by the first limiting member. The second exhaust port will be closed by the inner wall of the first assembly slot, and the first exhaust port will be closed by the outer wall of the valve pipe. Protective gas cannot be discharged from the first exhaust port and the second exhaust port to avoid gas waste. At the same time, the abutment member slides forward with the power sensor, causing the force sensor to retract to the front of the second limiting member. The piston moves forward under the action of gas pressure and abuts against the second limiting member. The force sensor is no longer under pressure and can be directly disassembled. The detection data when it is not under pressure is significantly different from the data under normal working conditions. The system can determine that the cabinet door is in the open state based on the difference. The valve body has a fourth exhaust port that communicates with the second assembly slot. The fourth exhaust port is used to connect to the pneumatic switch control structure located on the main body of the distribution cabinet. The gas in the second assembly slot can enter the pneumatic switch control structure through the fourth exhaust port to provide power for the indirect control of the switch.

2. The intelligent explosion-proof distribution cabinet for use in intelligent power distribution systems according to claim 1, characterized in that: The valve body has a third exhaust port that communicates with the first assembly slot, and the third exhaust port is used to connect a pressure relief valve located on the outside of the cabinet.

3. The intelligent explosion-proof distribution cabinet for intelligent power distribution systems according to claim 2, characterized in that: The third exhaust port is located on the side where the valve body is fitted to the inner wall of the cabinet. It is configured as an externally threaded tube that passes through the cabinet from the inside out and can be connected to an internally threaded fastening ring to fix the valve body to the cabinet.

4. The intelligent explosion-proof distribution cabinet for intelligent power distribution systems according to claim 1, characterized in that: The valve body is fitted to the inner wall of the cabinet and has a limiting groove that communicates with the first assembly groove. The first limiting member is connected to the side of the valve pipe and extends into the limiting groove.

5. The intelligent explosion-proof distribution cabinet for use in intelligent power distribution systems according to claim 1, characterized in that: The air inlet is located on the side where the valve body is fitted to the inner wall of the cabinet. It is configured as an externally threaded tube that passes through the cabinet from the inside out and can be connected to an internally threaded fastening ring to fix the valve body to the cabinet.

6. The intelligent explosion-proof distribution cabinet for use in intelligent power distribution systems according to claim 5, characterized in that: The valve body has a sealing gasket on the side that is fitted to the inner wall of the cabinet.

7. The intelligent explosion-proof distribution cabinet for use in intelligent power distribution systems according to claim 1, characterized in that: The valve pipe has at least two sets of annular sealing grooves on its circumferential surface. The two sets of annular sealing grooves are located on the front and rear sides of the second exhaust port, respectively, and annular sealing rings are installed in both sets of annular sealing grooves.

8. The intelligent explosion-proof distribution cabinet for use in intelligent power distribution systems according to claim 1, characterized in that: The piston has an annular sealing groove on its circumferential surface, and an annular sealing ring is fitted into each annular sealing groove.

9. The intelligent explosion-proof distribution cabinet for use in intelligent power distribution systems according to claim 1, characterized in that: The inner wall of the second assembly groove is provided with a retaining ring groove, and the second limiting member is configured to be a retaining ring assembled in the retaining ring groove.

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