Two-section incoming line type centralized control multifunctional combination feeder switch with connection and lighting

Abstract

A two-stage incoming line type centralized control has a multi-functional combined feeder switch with contact and lighting, comprising a feeder main cavity and an outgoing line cavity, wherein nine feeder main cavities are each provided with a feeder switch module, one feeder main cavity is provided with a lighting switch module, and another feeder main cavity is provided with a centralized control module; a bus cavity is provided with a first bus and a second bus; ten feeder switch modules comprise three first-stage branch switch modules, three second-stage branch switch modules, a contact switch module, a first-stage total switch module and a second-stage total switch module; a first-stage power supply is connected with the first bus through the first-stage total switch module; a second-stage power supply is connected with the second bus through the second-stage total switch module; the contact switch module is connected with the first bus and the second bus at two ends respectively; and the lighting switch module is internally provided with a lighting comprehensive protection circuit, which is used for converting high voltage into safe lighting output voltage. The utility model overcomes the defects of the prior art, and has the functions of double-bus incoming line, contact power supply, lighting conversion and remote centralized control.

Description

Technical Field

[0001] This utility model relates to the field of mining electrical equipment technology, specifically to a two-section incoming line type centralized control multi-functional combined power supply switch with communication and lighting functions. Background Technology

[0002] Feeder switches are suitable for use in coal mines and surrounding environments containing explosive mixtures of gases such as methane and coal dust. They can be used as main distribution switches or branch switches in three-phase power grids with AC 50Hz, voltages of 380V, 660V, or 1140V, and an ungrounded neutral point. They can also be used for infrequent starting of large-capacity motors. The operating environment should be: altitude not exceeding 1000 meters; ambient temperature -20℃ to +40℃; relative humidity not exceeding 95% (at 25℃); in mines containing explosive gases (methane mixtures); in locations free from corrosive gases that damage metals and insulation materials; free from severe vibration and impact; free from dripping water and other liquid infiltration; and installed vertically with an inclination not exceeding 15 degrees.

[0003] Currently, conventional combined power supply switches typically assemble multiple single-function power supply switches in the same cabinet. However, since each power supply switch is only physically integrated, the control logic of each power supply switch module remains independent, making it impossible to achieve power backup. This results in limited overall system reliability and flexibility, making it unable to adapt to complex and ever-changing downhole environments. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a two-stage incoming line centralized control multi-functional combined power supply switch with communication and lighting functions. It overcomes the deficiencies of existing technologies, has a reasonable design, and features dual busbar incoming lines, communication power supply, lighting switching, and remote centralized control functions.

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

[0006] A two-stage incoming line type centralized control multi-functional combined power supply switch with communication and lighting functions includes 11 independently isolated main power supply chambers, 10 independent outgoing line chambers, and one busbar chamber. The main power supply chambers are isolated from the outgoing line chambers and the busbar chamber. Each of the nine main power supply chambers contains a power supply switch module, one main power supply chamber contains a lighting switch module, and the other main power supply chamber contains a centralized control module. The power supply switch modules and lighting switch modules are movably mounted in the main power supply chambers via an electric chassis vehicle. The centralized control module is connected to each power supply switch module via a communication line.

[0007] The busbar cavity is equipped with a Section I busbar and a Section II busbar. The nine power supply switch modules include three Section I sub-switch modules, three Section II sub-switch modules, one tie switch module, a Section I main switch module, and a Section II main switch module. The input terminal of the Section I main switch module is connected to an external Section I power supply, and the output terminal of the Section I main switch module is connected to the Section I busbar. The input terminal of the Section II main switch module is connected to an external Section II power supply, and the output terminal of the Section II main switch module is connected to the Section II busbar. The input terminal of the tie switch module is connected to the Section I busbar, and the output terminal of the tie switch module is connected to the Section II busbar. The input terminals of the three Section I sub-switch modules and the input terminals of the Section II sub-switch modules are respectively connected to the Section I and Section II busbars. The input terminal of the lighting switch module is connected to the Section II busbar. The lighting switch module has a built-in lighting protection circuit for converting high voltage into a safe lighting output voltage.

[0008] Preferably, the interconnecting switch module has a built-in interlocking control circuit, which satisfies the following:

[0009] When the power supply to section I busbar is lost, the circuit breaker in the tie switch module closes to allow section II busbar to supply power to section I busbar;

[0010] When the second busbar loses power, the circuit breaker in the tie switch module closes to allow the first busbar to supply power to the second busbar.

[0011] Preferably, each feeder switch module is equipped with a protector, and each of the I-section and II-section branch switch modules is equipped with a current transformer. The current transformer is connected to the protector in the corresponding feeder main cavity via an aviation connector. Voltage transformers are installed on both the I-section and II-section busbars. The signal line of the voltage transformer on the I-section busbar is connected to the protector in the feeder main cavity corresponding to the I-section main switch module, and the signal line of the voltage transformer on the II-section busbar is connected to the protector in the feeder main cavity corresponding to the II-section main switch module. Each protector is connected to the control port of the circuit breaker in each feeder switch module via an RS-485 control bus to control the opening and closing of the vacuum circuit breaker. The protector is connected to a router via a network cable, and the router is connected to the central control module via a multi-port switch.

[0012] Preferably, each outgoing cavity is fixedly installed with a plum blossom contact on its inner wall. The plum blossom contact passes through the inner wall of the outgoing cavity and is connected to the main power supply cavity. The circuit breaker moving contact of the power supply switch module is movably inserted into the plum blossom contact. The wiring terminals of each plum blossom contact are respectively connected to the wiring terminals of the corresponding section I busbar and section II busbar.

[0013] Preferably, the centralized control module is externally equipped with a 12-inch full-color screen. The centralized control module has a built-in microprocessor, a dual-redundant PLC, a memory, a multi-port switch, and a communication gateway module. The dual-redundant PLC is connected to the microprocessor via a CAN bus. The 12-inch full-color screen communicates directly with the microprocessor. The microprocessor is connected to the multi-port switch via a PCIe bus. The multi-port switch is connected to the communication gateway module via an Ethernet interface. The multi-port switch communicates with each power supply switch module via an RS-485 interface. The communication gateway module communicates with the remote monitoring center via a wireless network. The memory is connected to the microprocessor via a SATA interface.

[0014] Preferably, a temperature sensor is fixedly embedded on the moving contact of the circuit breaker of each power supply switch module. The temperature sensor can wirelessly transmit temperature data signals to the protector through the temperature measurement host module in the corresponding power supply main cavity.

[0015] Preferably, a camera is fixedly installed in each power supply main cavity. The camera end is opposite to the moving contact of the circuit breaker of the corresponding power supply switch module. The output end of the camera is connected to the RJ45 port of the router via an Ethernet cable. The router is connected to the central control module via a multi-port switch.

[0016] This utility model provides a two-section incoming line centralized control multi-functional combined power supply switch with interconnection and lighting functions, which has the following advantages: By setting up an interconnection switch module and installing an interlocking control line within the interconnection switch module, the two ends of the interlocking control line are respectively connected to the protectors in the I-section main switch module and the II-section main switch module, and the interlocking control line is signal-connected to the control unit of the interconnection switch module. Thus, the voltage of the I-section bus and the II-section bus can be monitored in real time through the protectors in the I-section main switch module and the II-section main switch module, respectively. When the voltage of either the I-section bus or the II-section bus is detected to be 0% of its rated value, a signal is sent to the interconnection switch control unit through the interlocking control line. The interconnection switch control unit then controls the circuit breaker in the interconnection switch module to close, so that the II-section bus provides backup power to the I-section bus, or the I-section bus provides backup power to the II-section bus, ensuring stable system operation. This effectively avoids system paralysis caused by a single busbar fault, allowing busbar I and busbar II to serve as backup power sources for each other. This avoids the risk of a complete power outage caused by a single point of failure, improves the reliability and stability of the overall power supply system, and ensures the continuity of power supply. Furthermore, by installing each feeder switch module separately within the feeder main chamber using an electric chassis, maintenance or replacement of a particular feeder switch module only requires controlling the corresponding electric chassis to retract outwards. This separates the circuit breaker moving contact from the clover contact of that feeder switch module, enabling independent power disconnection of that feeder switch module without affecting the normal operation of other feeder switch modules. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of this utility model or the prior art will be briefly introduced below.

[0018] Figure 1 A schematic diagram of the structure of this utility model;

[0019] Figure 2 Circuit switch connection system diagram in this utility model;

[0020] Figure 3 Block diagram of the connection principle of each module in this utility model. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0022] Example 1, as Figure 1-3As shown, a two-stage incoming line centralized control multi-functional combined power supply switch with communication and lighting functions includes 11 independently isolated main power supply chambers, 10 independent outgoing line chambers, and one busbar chamber. The main power supply chambers are isolated from the outgoing line chambers and the busbar chamber. Therefore, the isolation design between the main power supply chambers and the outgoing line chambers ensures the high safety of the system. During fault repair, operators can independently operate each main power supply chamber in a safe environment, effectively avoiding cross-interference and improving the stability and maintenance efficiency of the system. Nine of the main power supply chambers are equipped with power supply switch modules, one main power supply chamber is equipped with a lighting switch module 4, and the other main power supply chamber is equipped with a centralized control module 9. The power supply switch modules and lighting switch modules 4 are movably installed in the main power supply chambers via an electric chassis vehicle. The centralized control module 9 is connected to each main power supply switch module via communication lines.

[0023] The busbar cavity houses a section I busbar 7 and a section II busbar 8. Nine feeder switch modules include three section I branch switch modules 1, three section II branch switch modules 2, one tie switch module 3, a section I main switch module 5, and a section II main switch module 6. The input terminal of section I main switch module 5 is connected to an external section I power supply, and the output terminal of section I main switch module 5 is connected to section I busbar 7. The input terminal of section II main switch module 6 is connected to an external section II power supply, and the output terminal of section II main switch module 6 is connected to section II busbar 7. Line 8 is connected; the input terminal of the tie switch module 3 is connected to the I section bus 7, and the output terminal of the tie switch module 3 is connected to the II section bus 8; the input terminals of the three I section branch switch modules 1 are connected to the I section bus 7, the input terminals of the three II section branch switch modules 2 are connected to the II section bus 8, and the input terminal of the lighting switch module 4 is connected to the II section bus 8; the lighting switch module 4 has a built-in lighting protection circuit, which is used to convert the 1140V / 660V input voltage to the 127V output voltage.

[0024] This invention establishes a tie switch module 3, within which an interlocking control line is installed. The two ends of the interlocking control line are connected to protectors in the I-section main switch module 5 and the II-section main switch module 6, respectively. The interlocking control line is also signal-connected to the control unit of the tie switch module 3. Voltage transformers 12 are installed on both the I-section and II-section busbars. The signal lines of the voltage transformers 12 on the I-section busbar are connected to protectors 10 in the corresponding feeder main chamber of the I-section main switch module, and the signal lines of the voltage transformers 12 on the II-section busbar are connected to protectors 10 in the corresponding feeder main chamber of the II-section main switch module. Therefore, the voltages of the I-section busbar and II-section busbar can be monitored in real time through the protectors in the I-section main switch module 5 and the II-section main switch module 6, respectively. During normal operation, the tie switch module 3 is in the open state, ensuring independent power supply to the two bus sections. When the voltage of bus section I is detected to be 0% of its rated value (for 100ms), a signal is sent to the tie switch control unit via the interlocking control line. The tie switch control unit then controls the circuit breaker in tie switch module 3 to close, allowing bus section II to provide backup power to bus section I, ensuring stable system operation. Similarly, when the voltage of bus section II is detected to be 0% of its rated value (for 100ms), a signal is sent to the tie switch control unit via the interlocking control line. The tie switch control unit then controls the circuit breaker in tie switch module 3 to close, allowing bus section I to provide backup power to bus section II, ensuring stable system operation. This design effectively avoids system paralysis caused by a single bus section fault, enabling bus section I and bus section II to serve as backup power for each other. This avoids the risk of a complete power outage caused by a single point of failure, improves the reliability and stability of the overall power supply system, and ensures the continuity of power supply.

[0025] Furthermore, by movably installing each feeder switch module within the main feeder cavity via an electric chassis, and more specifically, by fixing a pentagonal contact to the inner wall of each outgoing cavity, the pentagonal contact passes through the inner wall of the outgoing cavity and communicates with the main feeder cavity. The moving contacts of the circuit breakers of each feeder switch module are movably connected to the corresponding pentagonal contacts, and the terminals of each pentagonal contact are connected to the terminals of the corresponding Section I and Section II busbars. Specifically, the moving contacts of the circuit breakers of the three Section I branch switch modules 1 are movably connected to Section I busbar 7 via pentagonal contacts, and the moving contacts of the circuit breakers of the three Section II branch switch modules 2 are movably connected to Section II busbar 8 via pentagonal contacts.

[0026] Therefore, when maintaining or replacing a certain power supply switch module, it is only necessary to control the electric chassis vehicle corresponding to that power supply switch module to exit outward (this is existing technology, so it will not be described in detail), so that the moving contact of the circuit breaker of that power supply switch module separates from the plum blossom contact, thereby realizing the independent power-off operation of that power supply switch module without affecting the normal operation of other power supply switch modules.

[0027] Through the above design, electrical isolation is achieved between the various power supply switch modules, while centralized control can be achieved through the central control module when needed. This not only simplifies the maintenance process but also significantly improves the system's flexibility and safety, ensuring rapid power restoration even in the event of a single point of failure, thus guaranteeing the stability of the power system and meeting the electricity needs of users. This makes the entire power supply switch system more adaptable to the complex and ever-changing underground environment.

[0028] In Example 2, as a further preferred embodiment of Example 1, each feeder switch module is fixedly equipped with a protector 10, and each I-section and II-section branch switch module is equipped with a current transformer 11. The current transformer 11 is connected to the protector 10 in the corresponding feeder main cavity via an aviation connector. Voltage transformers 12 are installed on both the I-section bus and the II-section bus. The signal line of the voltage transformer 12 on the I-section bus is connected to the protector 10 in the feeder main cavity corresponding to the I-section main switch module, and the signal line of the voltage transformer 12 on the II-section bus is connected to the protector 10 in the feeder main cavity corresponding to the II-section main switch module. Each protector 10 is connected to the control port 13 of the circuit breaker in each feeder switch module via an RS-485 control bus to control the opening and closing of the vacuum circuit breaker. The protector 10 is connected to the router 14 via a network cable, and the protector 10 and the router 14 use the Modbus-RTU over TCP protocol. The router 14 is connected to the central control module 9 via a multi-port switch.

[0029] By installing independent protectors within each feeder switch module, and enabling each protector to communicate with the circuit breaker of its corresponding feeder switch module in the main feeder chamber via an RS-485 bus, current transformers can be used to detect the load current in each Section I and Section II sub-switch modules, serving as the basis for overload / short-circuit protection. Voltage transformers are used to monitor the voltage status of the Section I and Section II busbars in real time. Specifically, the current transformers can adopt a split-type core design, secured to the incoming guide rods of each Section I and Section II sub-switch module via clips. The signal lines of the voltage transformers on the Section I busbar are connected to the protectors within the Section I main switch module, and the signal lines of the voltage transformers on the Section II busbar are connected to the protectors within the Section II main switch module.

[0030] By monitoring data in real time through current transformers and voltage transformers, when a current transformer detects an abnormal load current in a feeder switch module, it transmits a signal to the protector within that module. The protector immediately activates the overload / short circuit protection mechanism, causing the circuit breaker in that feeder switch module to quickly trip, interrupting the abnormal current and preventing the fault from spreading. Simultaneously, the protector within the feeder switch module also transmits the fault information to the central control module via a router. The central control module then pushes the data to a remote monitoring center (such as a central control room server or handheld terminal) through a communication gateway module (such as a 4G / WIFI module), ensuring that management personnel can monitor the underground power system status in real time, respond promptly to and handle potential risks, and improve overall operational safety and reliability. When a voltage transformer detects an abnormal bus voltage, it transmits a signal to the corresponding protector, which then trips the circuit breaker in either the first or second stage main switch module to interrupt the abnormal voltage and prevent equipment damage. Meanwhile, the protector transmits fault information to the central control module via the router. The central control module then pushes alarm data to the remote monitoring center via the communication gateway module (such as a 4G / WIFI module), ensuring that management personnel can quickly learn about the fault and take emergency measures to ensure the stable operation of the power system.

[0031] Example 3, as a further preferred embodiment of Example 1, features a 12-inch full-color screen externally mounted on the central control module. The central control module internally houses a microprocessor, a dual-redundant PLC, a memory, a multi-port switch, and a communication gateway module. The dual-redundant PLC is connected to the microprocessor via a CAN bus. The 12-inch full-color screen communicates directly with the microprocessor. The microprocessor is connected to the multi-port switch via a PCIe bus. The multi-port switch is connected to the communication gateway module via an Ethernet interface. The multi-port switch communicates with each power supply switch module via an RS-485 interface. The communication gateway module communicates with the remote monitoring center via a wireless network. The memory is connected to the microprocessor via a SATA interface.

[0032] A 12-inch full-color screen allows operators to intuitively monitor and control the entire power supply switch system. The microprocessor built into the central control module serves as the system's core, processing data from each power supply switch module and making judgments and decisions based on preset logic. The dual-redundant PLC design further enhances system reliability; even if one PLC fails, the other continues to operate, ensuring stable system operation. The memory stores important information such as system configuration files, operation logs, and fault records, facilitating subsequent analysis and maintenance. The multi-port switch and communication gateway module are responsible for communication between various modules within the system and data exchange between the system and the remote monitoring center. Through a wireless network, the remote monitoring center can monitor the operating status of the power supply switches in real time and respond promptly to and handle any potential faults.

[0033] In Example 4, as a further preferred embodiment of Example 1, a temperature sensor 15 is fixedly embedded on the moving contact of the circuit breaker in each feeder switch module. The temperature sensor 15 can wirelessly transmit temperature data signals and transmit them to the corresponding protector 10 through the temperature measurement host module in the corresponding feeder main cavity. Thus, the temperature sensor 15 can monitor the temperature change of the circuit breaker in real time and transmit the data to the corresponding protector 10. After receiving the temperature data, the protector 10 analyzes and judges it. Once the temperature exceeds a preset threshold, it sends a trip command through the RS-485 control bus to quickly disconnect the circuit and prevent fire caused by overheating. Simultaneously, the protector synchronizes the abnormal temperature information to the central control module through the router 14. The central control module then sends an alarm to the remote monitoring center through the communication gateway module, ensuring that management personnel take immediate countermeasures to ensure the safety and stability of the power system.

[0034] In Example 5, as a further preferred embodiment of Example 1, a camera 16 is fixedly installed in each main power supply chamber. The camera end of the camera 16 is opposite to the moving contact of the circuit breaker of the corresponding power supply switch module. The output end of the camera is connected to the RJ45 port of the router 14 via an Ethernet cable. The router 14 is connected to the central control module via a multi-port switch. The camera monitors the status of the moving contact of the circuit breaker of the power supply switch module in real time. The camera output transmits the signal to the router via an Ethernet cable, and finally the router transmits it to the central control module via the multi-port switch. Operators can view these real-time video images on the 12-inch full-color screen of the central control module, thereby gaining a more intuitive understanding of the equipment's operating status and promptly identifying and handling potential problems.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A two-stage incoming line centralized control multi-functional combined power supply switch with communication and lighting functions, characterized in that: It includes 11 independent and isolated main power supply cavities, 10 independent outgoing line cavities, and one busbar cavity. The main power supply cavities are isolated from the outgoing line cavities and the busbar cavity. Each of the nine main power supply cavities is equipped with a power supply switch module, one main power supply cavity is equipped with a lighting switch module, and the other main power supply cavity is equipped with a centralized control module. The power supply switch modules and the lighting switch modules are movably installed in the main power supply cavities via an electric chassis vehicle. The centralized control module is connected to each power supply switch module via a communication line. The busbar cavity is equipped with a Section I busbar and a Section II busbar. The nine power supply switch modules include three Section I sub-switch modules, three Section II sub-switch modules, one tie switch module, a Section I main switch module, and a Section II main switch module. The input terminal of the Section I main switch module is connected to an external Section I power supply, and the output terminal of the Section I main switch module is connected to the Section I busbar. The input terminal of the Section II main switch module is connected to an external Section II power supply, and the output terminal of the Section II main switch module is connected to the Section II busbar. The input terminal of the tie switch module is connected to the Section I busbar, and the output terminal of the tie switch module is connected to the Section II busbar. The input terminals of the three Section I sub-switch modules and the input terminals of the Section II sub-switch modules are respectively connected to the Section I and Section II busbars. The input terminal of the lighting switch module is connected to the Section II busbar. The lighting switch module has a built-in lighting protection circuit for converting high voltage into a safe lighting output voltage.

2. The two-section incoming line centralized control multi-functional combined power supply switch with communication and lighting as described in claim 1, characterized in that: The interconnection switch module has a built-in interlocking control circuit, which satisfies the following: When the power supply to section I busbar is lost, the circuit breaker in the tie switch module closes to allow section II busbar to supply power to section I busbar; When the second busbar loses power, the circuit breaker in the tie switch module closes to allow the first busbar to supply power to the second busbar.

3. The two-section incoming line centralized control multi-functional combined power supply switch with communication and lighting as described in claim 1, characterized in that: Each feeder switch module is equipped with a protector. Each of the I-section and II-section branch switch modules is equipped with a current transformer. The current transformers are connected to the protectors in the corresponding feeder main chamber via aviation connectors. Voltage transformers are installed on both the I-section and II-section busbars. The signal lines of the voltage transformers on the I-section busbars are connected to the protectors in the feeder main chambers corresponding to the I-section main switch module, and the signal lines of the voltage transformers on the II-section busbars are connected to the protectors in the feeder main chambers corresponding to the II-section main switch module. Each protector is connected to the control port of the circuit breaker in each feeder switch module via an RS-485 control bus to control the opening and closing of the vacuum circuit breaker. The protectors are connected to a router via network cables, and the router is connected to the central control module via a multi-port switch.

4. The two-section incoming line centralized control multi-functional combined power supply switch with communication and lighting as described in claim 1, characterized in that: Each outgoing line cavity is fixedly equipped with a plum blossom contact on its inner wall. The plum blossom contact passes through the inner wall of the outgoing line cavity and is connected to the main power supply cavity. The circuit breaker moving contact of the power supply switch module is movably inserted into the plum blossom contact. The wiring terminals of each plum blossom contact are respectively connected to the wiring terminals of the corresponding section I bus and section II bus.

5. A two-section incoming line centralized control multi-functional combined power supply switch with communication and lighting as described in claim 1, characterized in that: The centralized control module is externally equipped with a 12-inch full-color screen. The module contains a microprocessor, a dual-redundant PLC, a memory, a multi-port switch, and a communication gateway module. The dual-redundant PLC is connected to the microprocessor via a CAN bus. The 12-inch full-color screen communicates directly with the microprocessor. The microprocessor is connected to the multi-port switch via a PCIe bus. The multi-port switch is connected to the communication gateway module via an Ethernet interface. The multi-port switch communicates with each power supply switch module via an RS-485 interface. The communication gateway module communicates with the remote monitoring center via a wireless network. The memory is connected to the microprocessor via a SATA interface.

6. A two-section incoming line type centralized control multi-functional combined power supply switch with communication and lighting as described in claim 1, characterized in that: Each circuit breaker moving contact of each power supply switch module is fixedly embedded with a temperature sensor, which is connected to the protector signal through the corresponding temperature measurement host module in the main power supply cavity.

7. A two-section incoming line centralized control multi-functional combined power supply switch with communication and lighting functions as described in claim 1, characterized in that: Each power supply main cavity is fixedly equipped with a camera. The camera end of the camera is opposite to the moving contact of the circuit breaker of the corresponding power supply switch module. The output end of the camera is connected to the RJ45 port of the router via an Ethernet cable. The router is connected to the central control module through a multi-port switch.

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