Modularized extensible combined disconnecting switch

Abstract

The invention discloses a modular extensible combined disconnecting switch, which relates to the technical field of disconnecting switches, and is technically characterized by comprising a main body frame, a first standardized interface is arranged on the main body frame, and the first standardized interface is detachably connected with a contact switch module; the contact switch module comprises a contact switch main body, a first dismounting assembly, a second standardized interface and a third standardized interface, and the first dismounting assembly is detachably connected with the first standardized interface; one side of the contact switch module is detachably connected with an arc extinguishing module through a second standardized interface; the other side of the contact switch module is detachably connected with an expansion module through a third standardized interface; the arc extinguishing module comprises an arc extinguisher and a second dismounting assembly, and the second dismounting assembly is detachably connected with the second standardized interface; the extension module comprises a functional assembly and a third dismounting assembly, and the third dismounting assembly is detachably connected with the third standardized interface; according to the invention, the modular design is realized, and the expandability is realized.

Description

Technical Field

[0001] This invention relates to the field of disconnector technology, and in particular to a modular and expandable combined disconnector. Background Technology

[0002] In the operation and maintenance of power systems, disconnect switches, as key equipment, bear important responsibilities such as isolating power sources and ensuring maintenance safety. Their performance and structure directly affect the stability and reliability of the power system. With the increasing diversification and complexity of electricity demand, higher requirements are placed on the functionality and adaptability of disconnect switches. However, most existing disconnect switches on the market still adopt a fixed structure. This traditional structure is gradually revealing many drawbacks in meeting the flexible and ever-changing operational needs of modern power systems and is difficult to effectively adapt to the ever-evolving trends in the power industry.

[0003] Existing fixed-structure disconnect switches have significant shortcomings in terms of flexibility. Taking the traditional RNG1 series disconnect switch as an example, although it adopts a double-break contact structure, which improves the breaking capacity and reliability of the contacts to some extent, its overall modularity is low. This means that in practical applications, it is impossible to flexibly configure the capacity or functional modules of the disconnect switch according to the actual needs of different scenarios, such as different power loads and functional requirements. For example, when the power load changes and the capacity of the disconnect switch needs to be adjusted, due to the low modularity, it is not possible to simply and quickly replace or add or remove corresponding modules to adjust the capacity. The only option is to replace the entire disconnect switch equipment, which not only increases the equipment procurement cost but also wastes a lot of manpower and resources on disassembly and installation, affecting the normal operation efficiency of the power system.

[0004] Besides lacking flexibility, the expandability of existing fixed-structure disconnect switches is also severely limited. Taking the disconnect switches in Schneider BlokSet switchgear as an example, although this switchgear achieves functional compartment independence, improving equipment safety and maintainability to some extent, it faces serious challenges in terms of expansion. When functional expansion or capacity increase of the disconnect switches is required, due to the fixed structure, partial expansion or upgrades based on the original equipment are not possible; the entire equipment must be replaced. Summary of the Invention

[0005] In order to at least solve one of the above-mentioned technical problems, the present invention aims to provide a modular and scalable combined disconnect switch with a modular design and scalability.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A modular and expandable combined disconnect switch includes a main frame with a first standardized interface detachably connected to a contact switch module. The contact switch module includes a contact switch body, a first disassembly / assembly component, a second standardized interface, and a third standardized interface. The first disassembly / assembly component is detachably connected to the first standardized interface. An arc-extinguishing module is detachably connected to one side of the contact switch module via the second standardized interface. An expansion module is detachably connected to the other side of the contact switch module via the third standardized interface. The arc-extinguishing module includes an arc extinguisher and a second disassembly / assembly component detachably connected to the second standardized interface. The expansion module includes a functional component and a third disassembly / assembly component detachably connected to the third standardized interface.

[0008] Preferably, the first standardized interface, the second standardized interface, and the third standardized interface have the same structure, each including a slot, a wire socket is provided in the slot, an insulating sealing gasket is fixed to the inner wall of the slot, and at least four limiting threaded rods are evenly provided on the outer side of the slot.

[0009] Preferably, the first, second, and third disassembly and assembly components have the same structure, each including a plug block adapted to the corresponding slot. The plug block has a wire insertion hole adapted to the wire socket. A disassembly and assembly plate is fixedly connected to the outer wall of the plug block. The disassembly and assembly plate has through holes evenly distributed to adapt to the limiting threaded rod. An internal threaded ring is rotatably connected to the side of the disassembly and assembly plate away from the slot at the through hole. The internal threaded ring is adapted to the external thread of the limiting threaded rod.

[0010] Preferably, the top of the internal threaded ring is closed.

[0011] Preferably, the functional component is configured as one or more combinations of an overcurrent protector, an overvoltage protector, a leakage current protector, a remote control module, and a current and voltage sensor.

[0012] Preferably, the type of the contact switch body is one of a single-pole single-throw contact switch, a single-pole double-throw contact switch, or a double-pole double-throw contact switch.

[0013] Preferably, the arc extinguisher is one of the following: magnetic blowout arc extinguisher, grid arc extinguisher, or gas-generating arc extinguisher.

[0014] Preferably, the main frame is made of high-strength aluminum alloy or stainless steel.

[0015] The present invention has the following beneficial effects:

[0016] I. Enhanced Flexibility: Traditional fixed-structure disconnect switches have low modularity, making it impossible to flexibly configure capacity or functional modules according to actual needs such as power load and functional requirements in different scenarios. When power load changes and capacity needs to be adjusted, the entire device must be replaced, increasing procurement costs, wasting manpower and resources on disassembly and reassembly, and affecting the operating efficiency of the power system. In contrast, the modular and expandable combined disconnect switch of this invention allows for the detachable connection of contact switch modules through a first standardized interface on the main frame. These contact switch modules are then detachably connected to arc-extinguishing modules and expansion modules through second and third standardized interfaces, respectively. This design enables convenient and quick replacement or addition / removal of corresponding modules to adjust capacity and configure functions according to different scenario requirements in practical applications. This significantly improves the flexibility of the disconnect switch, reduces equipment procurement costs, minimizes waste of manpower and resources, and improves the normal operating efficiency of the power system.

[0017] II. Enhanced Scalability: Existing fixed-structure disconnect switches face significant challenges in terms of scalability. When functional expansion or capacity upgrades are needed, the fixed structure prevents partial expansion or upgrades based on the existing equipment, necessitating a complete replacement. The modular, expandable combined disconnect switch of this invention, with its standardized interfaces enabling detachable connections between modules, allows for functional expansion or capacity upgrades simply by installing the required expansion module or replacing the contact switch module with one of suitable capacity at the corresponding standardized interface. This eliminates the need for a complete replacement of the entire device, greatly enhancing the scalability of the disconnect switch and better adapting to the evolving needs of the power system.

[0018] III. Unique Combination Effects of Standardized Interfaces: The first, second, and third standardized interfaces of this invention have identical structures, all including slots with wire sockets inside. Insulating sealing gaskets are fixed to the inner walls of the slots, and at least four limiting threaded rods are evenly distributed on the outer sides of the slots. Simultaneously, the first, second, and third disassembly / assembly components also have identical structures, each including a plug block adapted to the corresponding slot. The plug block has wire insertion holes adapted to the wire sockets, and a disassembly / assembly plate is fixedly connected to the outer wall of the plug block. Through holes adapted to the limiting threaded rods are evenly distributed on the disassembly / assembly plate. The side of the disassembly / assembly plate away from the slot is rotatably connected at the through holes to an internally threaded ring adapted to the external threads of the limiting threaded rods, with the top of the internally threaded ring closed. This standardized interface and disassembly / assembly component design makes the connections between different modules more standardized and uniform. This not only facilitates module installation and disassembly, improving assembly efficiency, but also ensures the stability and reliability of the connection, reducing the probability of failures caused by connection problems. Furthermore, the standardized design also facilitates mass production and maintenance of the product, reducing production costs and maintenance difficulty.

[0019] IV. Diverse Functional Components: The functional components in the extended modules of this invention are one or more combinations of overcurrent protectors, overvoltage protectors, leakage current protectors, remote control modules, and current and voltage sensors. This diverse range of functional components allows the disconnecting switch to flexibly combine the required functional modules according to different usage scenarios and needs, achieving the integration of multiple functions. For example, in some locations with high electrical safety requirements, overcurrent protectors, overvoltage protectors, and leakage current protectors can be combined simultaneously to provide comprehensive protection for the power system; in some scenarios requiring remote monitoring and management, remote control modules and current and voltage sensors can be added to achieve remote operation of the disconnecting switch and real-time monitoring of power parameters. This diverse combination of functions greatly improves the applicability and practicality of the disconnecting switch, meeting the personalized needs of different users and different scenarios. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structural assembly and disassembly of an embodiment of the present invention.

[0022] Figure 2 This is a cross-sectional view of the standardized interface and disassembly / assembly components in an embodiment of the present invention.

[0023] In the diagram: 1. Main frame; 101. First standardized interface; 201. Contact switch body; 202. First disassembly / assembly assembly; 203. Second standardized interface; 204. Third standardized interface; 301. Arc extinguisher; 302. Second disassembly / assembly assembly; 401. Functional component; 402. Third disassembly / assembly assembly; 501. Slot; 502. Wire socket; 503. Insulating sealing gasket; 504. Limiting threaded rod; 601. Insert block; 602. Wire insertion hole; 603. Disassembly / assembly plate; 604. Internal threaded ring. Detailed Implementation

[0024] 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.

[0025] like Figures 1 to 2As shown, a modular and expandable combined disconnect switch includes a main frame 1. A first standardized interface 101 is provided on the main frame 1. A contact switch module is detachably connected to the first standardized interface 101. The contact switch module includes a contact switch body 201, a first disassembly / assembly component 202, a second standardized interface 203, and a third standardized interface 204. The first disassembly / assembly component 202 is detachably connected to the first standardized interface 101. An arc-extinguishing module is detachably connected to one side of the contact switch module via the second standardized interface 203. An expansion module is detachably connected to the other side of the contact switch module via the third standardized interface 204. The arc-extinguishing module includes an arc extinguisher 301 and a second disassembly / assembly component 302, which is detachably connected to the second standardized interface 203. The expansion module includes a functional component 401 and a third disassembly / assembly component 402, which is detachably connected to the third standardized interface 204.

[0026] like Figures 1 to 2 As shown, this invention uses a main frame 1 as its basic structure. A first standardized interface 101 on the main frame 1 serves as the core connection point, and is detachably connected to the first disassembly / assembly component 202 of the contact switch module, thus fixing the contact switch module to the main frame 1. This detachable connection allows the contact switch module to be easily installed, replaced, or disassembled according to actual needs. A second standardized interface 203 is provided on one side of the contact switch module, and the arc-extinguishing module is detachably connected to this second standardized interface 203 via its second disassembly / assembly component 302. When the contact switch performs opening and closing operations, an electric arc may be generated. The function of the arc-extinguishing module is to quickly extinguish the arc, ensuring the safe operation of the isolating switch. Through the connection of the standardized interface, the arc-extinguishing module can accurately handle the electric arc generated by the contact switch operation, and different types of arc-extinguishing modules can be easily replaced according to different usage environments and arc characteristics. A third standardized interface 204 is provided on the other side of the contact switch module, and the expansion module is detachably connected to this third standardized interface 204 via its third disassembly / assembly component 402. The functional components 401 in the expansion module can be configured in various ways according to actual needs, such as overcurrent protectors, overvoltage protectors, leakage current protectors, remote control modules, current and voltage sensors, etc. This detachable connection method allows for flexible addition of required functions to the disconnecting switch, meeting the usage requirements in different scenarios.

[0027] like Figures 1 to 2As shown, the first standardized interface 101, the second standardized interface 203, and the third standardized interface 204 have the same structure, all including a slot 501. A wire socket 502 is provided inside the slot 501, and an insulating sealing gasket 503 is fixed to the inner wall of the slot 501. At least four limiting threaded rods 504 are evenly arranged on the outer side of the slot 501. The first disassembly / assembly assembly 202, the second disassembly / assembly assembly 302, and the third disassembly / assembly assembly 402 have the same structure, all including a plug 601 adapted to the corresponding slot 501. The plug 601 has a wire insertion hole 602 adapted to the wire socket 502. A disassembly / assembly plate 603 is fixedly connected to the outer wall of the plug 601. The disassembly / assembly plate 603 has through holes evenly arranged to match the limiting threaded rods 504. An internally threaded ring is rotatably connected to the side of the disassembly / assembly plate 603 away from the slot 501 at the through hole. (604, internally threaded ring) The external thread of 604 is compatible with that of the limit thread rod 504.

[0028] like Figures 1 to 2 As shown, the standardized interface slot 501 provides insertion space for the assembly / disassembly component plug 601. During module connection, the assembly / disassembly component plug 601 is accurately inserted into the corresponding standardized interface slot 501 for initial physical positioning. The wire socket 502 within the slot 501 corresponds to the wire socket 602 on the plug 601. During the insertion of the plug 601 into the slot 501, the wire socket 502 and wire socket 602 precisely align, achieving electrical connection and allowing current to be smoothly conducted between different modules. The insulating sealing gasket 503 on the inner wall of the slot 501 serves a dual purpose. On one hand, it provides insulation, preventing current leakage to the outside, ensuring operator safety, and avoiding interference with surrounding equipment. On the other hand, through its elastic deformation, it fills the tiny gap between the plug 601 and the inner wall of the slot 501, providing a seal and preventing dust, moisture, and other impurities from entering the interface and affecting the stability and lifespan of the electrical connection. At least four limiting threaded rods 504 are evenly arranged on the outer side of the slot 501, corresponding to the through holes on the disassembly plate 603. When the insert block 601 is inserted into the slot 501, the limiting threaded rods 504 pass through the through holes on the disassembly plate 603. At this time, the internal threaded ring 604 is rotated and tightened onto the limiting threaded rods 504. Through the cooperation of the internal and external threads, the disassembly plate 603 is firmly fixed onto the limiting threaded rods 504, thereby firmly connecting the entire disassembly assembly to the standardized interface, ensuring the stability and reliability of the connection between modules.

[0029] Because the first standardized interface 101, the second standardized interface 203, and the third standardized interface 204 have the same structure, and the first disassembly / assembly component 202, the second disassembly / assembly component 302, and the third disassembly / assembly component 402 also have the same structure, this unified design allows modules with different functions (such as contact switch modules, arc extinguishing modules, and expansion modules) to be flexibly combined and expanded through the same connection method. Technicians can easily replace or add modules according to actual needs, achieving customization and upgrades to the isolating switch function.

[0030] like Figures 1 to 2 As shown, the internal threaded sleeve is made of 604 stainless steel with a closed top. The closed top of the 604 stainless steel is primarily to prevent dust, impurities, and moisture from entering the internal threaded sleeve. During equipment operation, the surrounding environment may contain various tiny particles and moisture. If the 604 stainless steel top of the internal threaded sleeve is not closed, these impurities and moisture may enter the thread, causing rust and wear, affecting the fit accuracy between the internal thread and the 504 stainless steel external thread of the limiting thread rod, and thus reducing the strength and stability of the connection. The closed top design effectively blocks adverse external factors, ensuring the normal operation and long-term reliability of the threaded connection.

[0031] Functional component 401 is configured as one or more combinations of an overcurrent protector, overvoltage protector, residual current device (RCD), remote control module, and current and voltage sensor. When the current in the circuit exceeds a set safety value, the overcurrent protector will quickly activate, cutting off the circuit to prevent equipment damage, fires, or other safety accidents caused by overcurrent. It monitors the current magnitude and compares it with an internally set threshold; once the threshold is exceeded, the protection mechanism is triggered. When the circuit voltage exceeds the normal operating range, the overvoltage protector takes effect. It can detect voltage changes, and when the voltage exceeds a set value, it promptly limits or discharges the excessive voltage, protecting the equipment connected in the circuit from overvoltage surges and preventing insulation damage, performance degradation, or even burnout. When leakage occurs in the circuit, i.e., current leaks to ground, the RCD will detect the magnitude of the leakage current. Once the leakage current exceeds the set operating current value, it will cut off the circuit within a very short time (usually tens of milliseconds) to prevent electric shock accidents and ensure personal safety. Remote control modules can connect to external control devices via wireless communication technologies (such as Wi-Fi, Bluetooth, ZigBee, etc.) or wired communication methods (such as Ethernet). Operators can send control commands from locations far from the disconnector switch using mobile phones, computers, or other terminal devices to perform opening and closing operations, status inquiries, etc., improving operational convenience and flexibility, especially suitable for situations where direct access is difficult or remote monitoring is required. Current and voltage sensors are used to monitor current and voltage parameters in the circuit in real time. They convert current and voltage signals into measurable electrical signals (such as voltage signals) and transmit them to monitoring systems or other devices. Accurate measurement of current and voltage allows for understanding the circuit's operating status, providing data support for normal equipment operation, and also helps in the accurate determination of overcurrent and overvoltage protection functions.

[0032] The contact switch body 201 belongs to one of the following categories: single-pole single-throw contact switch, single-pole double-throw contact switch, and double-pole double-throw contact switch. A single-pole single-throw contact switch has only one moving contact and one stationary contact, and the circuit is switched on or off by the contact or separation of the moving and stationary contacts. It has a simple structure and is suitable for applications that only require control of a single circuit. A single-pole double-throw contact switch has one moving contact and two stationary contacts. The moving contact can switch between the two stationary contacts, thereby achieving switching between different circuit paths. It is often used in scenarios that require changing the circuit connection method or switching to a backup circuit. A double-pole double-throw contact switch has two moving contacts and two groups of stationary contacts (each group contains two stationary contacts). It can control two independent circuits simultaneously, and each circuit can switch between two different connection states. It is suitable for applications that require complex control and switching of multiple circuits simultaneously.

[0033] Arc extinguisher 301 is classified as one of the following: magnetic blowout arc extinguisher 301, grid arc extinguisher 301, or gas-generating arc extinguisher 301. The magnetic blowout arc extinguisher 301 utilizes the force of a magnetic field on the arc to lengthen and cool it. When the contacts break the circuit and generate an arc, the magnetic field causes the arc to move within the field, thus lengthening it. Simultaneously, during this movement, the arc comes into full contact with the surrounding cooling medium (such as air), dissipating heat, increasing the arc voltage, decreasing the current, and ultimately extinguishing the arc. The grid arc extinguisher 301 consists of multiple metal grids. After entering the grids, the arc is divided into a series of short arcs. Each short arc has a relatively large voltage drop, and the total voltage drop of multiple short arcs connected in series is sufficient to extinguish the arc. Simultaneously, the grids can also absorb the arc's heat, accelerating the cooling and extinguishing process. The gas-generating arc extinguisher 301 contains a gas-generating material. When an electric arc is generated, the high temperature causes the gas-generating material to decompose and produce a large amount of gas. This gas has high pressure and flow rate, which can blow away the electric arc, causing it to lengthen and cool down. At the same time, it disperses the charged particles in the electric arc, reducing the conductivity of the arc, thereby achieving the purpose of extinguishing the arc.

[0034] The main frame 1 is made of high-strength aluminum alloy or stainless steel. High-strength aluminum alloy is characterized by its low density and high strength. Using high-strength aluminum alloy as the material for the main frame 1 ensures that the frame has sufficient strength to support and fix the various modules while reducing the weight of the entire disconnect switch, facilitating installation and transportation. In addition, aluminum alloy has good corrosion resistance, which can resist the erosion of the surrounding environment to a certain extent and extend the service life of the equipment. Stainless steel has excellent corrosion resistance and high strength. The stainless steel main frame 1 can adapt to various harsh environmental conditions, such as humid and corrosive gas environments, and is not easy to rust or be damaged. Its high strength ensures that the frame maintains a stable structure during long-term use, providing reliable support and fixation for the various modules.

[0035] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A modular, scalable, combined disconnector, characterized in that: The utility model provides a kind of contact switch module, including main body frame (1), first standardization interface (101) is provided on the main body frame (1), the first standardization interface (101) is detachably connected with contact switch module, the contact switch module includes contact switch body (201), first dismounting component (202), second standardization interface (203), third standardization interface (204), the first dismounting component (202) is detachably connected with first standardization interface (101);Contact switch module side is detachably connected with arc extinguishing module by second standardization interface (203);The other side of contact switch module is detachably connected with expansion module by third standardization interface (204);The arc extinguishing module includes arc extinguisher (301) and second dismounting component (302), and the second dismounting component (302) is detachably connected with second standardization interface (203);The expansion module includes functional component (401) and third dismounting component (402), and the third dismounting component (402) is detachably connected with third standardization interface (204).

2. A modular, scalable combination disconnector according to claim 1, characterized in that, The first standardization interface (101), second standardization interface (203), third standardization interface (204) are same in structure, and all include slot (501), the slot (501) is provided with wire socket (502) inside, the inner wall of the slot (501) is fixed with insulating sealing washer (503), and the outer side of the slot (501) is evenly provided with at least four limiting screw rods (504).

3. A modular, scalable combination disconnector according to claim 2, characterized in that, The first dismounting component (202), second dismounting component (302) and third dismounting component (402) are same in structure, and all include plug-in block (601) matched with corresponding slot (501), the plug-in block (601) is provided with wire insertion hole (602) matched with wire socket (502), the outer wall of the plug-in block (601) is fixedly connected with dismounting plate (603), the dismounting plate (603) is evenly provided with through hole matched with limiting screw rod (504), and the side, away from the slot (501), of the dismounting plate (603) is rotatably connected with internal thread ring (604) at the through hole, and the internal thread ring (604) is matched with external thread of limiting screw rod (504).

4. A modular, scalable combination disconnector according to claim 3, characterized in that, The internal thread ring (604) is closed at top.

5. The modular, scalable combination disconnector according to claim 1, characterized in that, The functional component (401) is one or more combinations of overcurrent protector, overvoltage protector, leakage protector, remote control module and current-voltage sensor.

6. The modular, scalable combination disconnector according to claim 1, characterized in that, The contact switch body (201) is one of single-pole single-throw contact switch, single-pole double-throw contact switch and double-pole double-throw contact switch.

7. The modular, scalable combination disconnector according to claim 1, characterized in that, The arc extinguisher (301) is one of magnetic blow arc extinguisher (301), grid arc extinguisher (301) and gas generating arc extinguisher (301).

8. The modular, scalable combination disconnector of claim 1, wherein, The main body frame (1) is made of high-strength aluminum alloy or stainless steel.

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