Protective isolating switch

Abstract

A protective disconnecting switch disclosed by the present invention comprises a base and a protective cover arranged on the base, the base is provided with a disconnecting switch structure and a protective cover structure covering the disconnecting switch structure, and the disconnecting switch structure comprises a C-shaped underframe arranged on the base and a disconnecting switch body arranged on the underframe. The isolation switch further comprises a brake pull-rod used for driving the isolation switch blade, and the top of the brake pull-rod is installed on the protective cover structure. The protective cover structure comprises a concentric-square-shaped cover and an inverted-U-shaped top cover, first heat dissipation windows are arranged on the two sides of the concentric-square-shaped cover, and second heat dissipation windows are arranged on the two sides of the top cover. The invention relates to the technical field of low-voltage electric appliances, and particularly provides a protective disconnecting switch.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, specifically to a protective disconnect switch. Background Technology

[0002] A disconnecting switch is a type of electrical switch that isolates power supply in a circuit. Its main function is to ensure that electrical equipment has a clear disconnect point from live parts during maintenance or standby, thereby ensuring the safety of operators.

[0003] Currently, most protective disconnect switches on the market reduce the exposed area by adding a sealed outer shell to a regular disconnect switch. This design is simple and low-cost. However, while the outer shell is tightly sealed, it is not conducive to the dissipation of heat generated inside the switch, especially in the contacts, due to the switching of current. Long-term operation can easily lead to excessive temperature rise and insulation aging. In addition, when interrupting large currents or inductive loads, the arc-extinguishing chamber, which relies on natural cooling, is prone to a long arcing time, posing a risk of arc reignition or arcing, which poses a potential threat to the internal insulation of the switch and to external personnel. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that while reducing exposure by using a sealed shell, there is a heat dissipation problem, and arc extinguishing relies on natural cooling, which poses a potential risk.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: The present solution provides a protective disconnect switch, including a base and a protective cover structure disposed on the base. The disconnect switch structure includes a C-shaped base frame disposed on the base and a disconnect switch body disposed on the base frame. It also includes a lever for driving the disconnect switch knife, and the top of the lever is mounted on the protective cover structure.

[0006] Preferred technical solution 1: The protective cover structure includes a U-shaped cover and an inverted U-shaped top cover. The U-shaped cover has heat dissipation windows on both sides and the top cover has heat dissipation windows on both sides. The U-shaped cover is installed on the disconnect switch body. The inner walls of both sides of the U-shaped cover are provided with sliding grooves. The top cover is slidably installed in the sliding grooves. The bottom wall of the top cover is fixedly connected to the top of the switch rod.

[0007] Preferred technical solution 2: The disconnecting switch knife is provided with a guide groove in the middle, and the pulling rod is provided with a slider and is slidably disposed in the guide groove.

[0008] Preferred technical solution 3: The rear wall of the U-shaped cover is provided with a miniature air pump, and the inner side wall of the U-shaped cover is provided with multiple sets of nozzles, the nozzles facing the separation point of the stationary contact, and the nozzles are connected to the miniature air pump through air pipes.

[0009] Preferred technical solution four: The U-shaped cover is also equipped with a status monitoring module, which includes an infrared temperature sensor, a microprocessor and an indicator light. The test point of the infrared temperature sensor faces the contact area of ​​the moving and stationary contacts.

[0010] Preferred technical solution five: The status monitoring module also has a built-in wireless communication module, which can be connected to an external terminal. The wireless communication module is one of a Wi-Fi module, a Bluetooth module, or a mobile cellular network module.

[0011] Preferred technical solution six: The base and the bracket are provided with through openings, and two sets of guide rollers are symmetrically arranged on the through openings on the base. The contact surface between the pull rod and the guide rollers is provided with a limiting groove.

[0012] Preferred technical solution seven: The U-shaped cover and the top cover are made of aluminum alloy by stamping. The front side of the U-shaped cover is provided with a transparent observation window. The four corners of the U-shaped cover are provided with mounting blocks. The mounting blocks and the corresponding positions on the base are provided with mounting holes.

[0013] The protective disconnect switch proposed in this invention achieves the following beneficial effects using the above-described structure:

[0014] (1) This invention creatively achieves dynamic switching of protection state by setting a relatively sliding U-shaped cover and an inverted U-shaped top cover, and making the heat dissipation windows on its side walls alternately sealed under normal conditions and overlapped and connected when the circuit is opened; when the circuit is closed and stationary, the alternately arranged heat dissipation windows form a seal, effectively isolating dust and moisture and protecting the internal contacts; at the moment of disconnection, the top cover moves up to align the heat dissipation windows, forming an efficient ventilation channel to promptly discharge the high-temperature gas generated by the electric arc, thus solving the contradiction between closed protection and heat dissipation when the circuit is opened, enabling the switch to adapt to more complex environments and ensuring safety during operation.

[0015] (2) The present invention integrates a micro air pump and a nozzle pointing to the root of the electric arc in the sealed cover. When the circuit is opened, the gas is actively sprayed, which can quickly cool and lengthen the electric arc, effectively making up for the lack of natural cooling and arc extinguishing in the sealed space and reducing the risk of arcing. At the same time, the added infrared temperature measurement and status indication module can monitor the abnormal contact temperature in real time and issue local alarms. Combined with the wireless communication function, it can realize remote status monitoring and early warning. This realizes the leap from "passive protection" to "active safety and monitoring", which greatly improves the electrical safety performance and intelligent operation and maintenance level of the switch.

[0016] (3) This invention integrates driving, protection, arc extinguishing, and monitoring functions into the cover assembly and base. The lever is fixed to the top cover and slides with the knife guide groove, enabling simultaneous opening of the circuit breaker with one hand, top cover sliding for heat dissipation, and air pump triggering for arc extinguishing, making operation simple and efficient. In addition, the use of aluminum alloy stamping ensures heat dissipation and strength, a transparent observation window on the front allows for direct viewing of the internal contact opening and closing status, and standard mounting holes at the four corners make overall installation quick and convenient, demonstrating good engineering practicality and maintainability. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of a protective disconnect switch proposed in this invention;

[0019] Figure 2 An explosion-proof protective disconnect switch proposed in this invention Figure 1 ;

[0020] Figure 3 An explosion-proof protective disconnect switch proposed in this invention Figure 2 ;

[0021] Figure 4 This is a schematic diagram of the disconnecting switch structure of a protective disconnecting switch proposed in this invention;

[0022] Figure 5 This is a schematic diagram of a protective isolating switch housing proposed in this invention;

[0023] Figure 6 This is a schematic diagram of the base of a protective disconnect switch proposed in this invention.

[0024] The components include: 1. base, 2. disconnector switch structure, 3. protective cover structure, 4. base frame, 5. disconnector switch body, 6. knife switch, 7. lever, 8. U-shaped cover, 9. top cover, 10. heat dissipation window one, 11. heat dissipation window two, 12. slide groove, 13. guide groove, 14. slider, 15. miniature air pump, 16. nozzle, 17. status monitoring module, 18. guide roller, 19. limit groove, and 20. transparent observation window. Detailed Implementation

[0025] The technical inventions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively. Example 1

[0027] like Figures 1-6 As shown, the technical invention adopted by the present invention is as follows: In order to solve the above technical problems, the present invention provides the following technical solution: The protective disconnect switch provided by the present solution includes a base 1 and a disconnect switch structure 2 and a protective cover structure 3 covering the disconnect switch structure 2 on the base 1. The disconnect switch structure 2 includes a C-shaped base frame 4 on the base 1 and a disconnect switch body 5 on the base frame 4. It also includes a pull rod 7 for driving the disconnect switch knife 6. The top of the pull rod 7 is installed on the protective cover structure 3.

[0028] like Figures 1-3 As shown, the protective cover structure 3 includes a U-shaped cover 8 and an inverted U-shaped top cover 9. The U-shaped cover 8 has heat dissipation windows 10 on both sides, and the top cover 9 has heat dissipation windows 11 on both sides. The U-shaped cover 8 covers the disconnector switch body 5. The inner walls of both sides of the U-shaped cover 8 have sliding grooves 12. The top cover 9 is slidably disposed in the sliding grooves 12. The bottom inner wall of the top cover 9 is fixedly connected to the top of the lever 7. In the initial state, the U-shaped cover 8 and the top cover 9 form a sealed cavity to protect the disconnector switch body 5. At the same time, the heat dissipation windows 10 and 21 are staggered. When the lever 7 moves upward, it drives the top cover 9 to move upward, so that the heat dissipation windows 10 and 21 overlap, achieving rapid heat dissipation. The U-shaped cover 8 and the top cover 9 are made of aluminum alloy and are stamped. The front side of the U-shaped cover 8 has a transparent observation window 20. The four corners of the U-shaped cover 8 have mounting blocks. The mounting blocks and the corresponding positions on the base 1 have mounting holes. During installation, bolts are passed through the mounting holes on the mounting blocks and the base 1, and nuts are used to achieve quick installation.

[0029] like Figures 4-6As shown, the disconnector switch 6 has a guide groove 13 in the middle, and the lever 7 has a slider 14 that slides within the guide groove 13. When the lever 7 moves upward, it drives the slider 14 to slide within the guide groove 13, thus opening the disconnector switch 6. The base 1 and the bracket have through openings. Two sets of guide rollers 18 are symmetrically arranged on the through openings of the base 1. The contact surface between the lever 7 and the guide rollers 18 has a limiting groove 19. In operation, the lever 7 moves vertically up and down under the cooperation of the limiting groove 19 and the guide rollers 18, thus opening and closing the switch. Example 2

[0030] Based on Example 1, such as Figure 3 and Figure 5 As shown, in order to quickly extinguish the generated electric arc, a miniature air pump 15 is provided on the rear wall of the U-shaped cover 8, and multiple sets of nozzles 16 are provided on the inner side wall of the U-shaped cover 8. The nozzles 16 face the separation point of the stationary contact. The nozzles 16 are connected to the miniature air pump 15 through an air pipe. When the circuit breaker is opened, the miniature air pump 15 blows external air through the nozzles 16 to the root of the electric arc to extinguish the arc.

[0031] The U-shaped cover 8 also houses a status monitoring module 17, which includes an infrared temperature sensor, a microprocessor, and indicator lights. The infrared temperature sensor's test point faces the contact area of ​​the moving and stationary contacts. The microprocessor receives sensor signals, and the indicator lights display the local status. The status monitoring module 17 also has a built-in wireless communication module that can connect to an external terminal. The wireless communication module can be a Wi-Fi module, a Bluetooth module, or a mobile cellular network module. The external terminal can be a smartphone, tablet, or remote server, running a corresponding application or accessing a cloud control interface to send control commands to the controller.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, material, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, material, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective disconnector, characterized in that The utility model relates to an isolation switch, including base (1) and be located in base (1), be equipped with disconnecting switch structure (2) and shield cover structure (3) of cover in disconnecting switch structure (2) on base (1), disconnecting switch structure (2) including C type chassis (4) of being equipped with on base (1), and disconnecting switch body (5) of being equipped with on chassis (4), still include the pull -out handle (7) for driving disconnecting switch contact (6), the top of pull -out handle (7) is installed on shield cover structure (3).

2. A protective disconnector according to claim 1, characterised in that The shield cover structure (3) includes a back-shaped cover (8) and an inverted U-shaped top cover (9), both sides of the back-shaped cover (8) are provided with heat dissipation windows (10), both sides of the top cover (9) are provided with heat dissipation windows (11), the back-shaped cover (8) covers the disconnecting switch body (5), both side inner walls of the back-shaped cover (8) are provided with sliding grooves (12), the top cover (9) is slidingly arranged in the sliding grooves (12), and the inner bottom wall of the top cover (9) is fixedly connected with the top end of the pull -out handle (7).

3. A protective disconnector according to claim 2, characterised in that The disconnecting switch contact (6) is provided with a guide groove (13) in the middle, and the pull -out handle (7) is provided with a sliding block (14) and slidingly arranged in the guide groove (13).

4. A protective disconnector according to claim 3, characterised in that The back wall of the back-shaped cover (8) is provided with a micro air pump (15), the inner side wall of the back-shaped cover (8) is provided with a plurality of nozzles (16), the nozzles (16) are directed to the static contact separation point, and the nozzles (16) are connected with the micro air pump (15) through air pipes.

5. A protective disconnector according to claim 4, characterised in that The back-shaped cover (8) is further provided with a state monitoring module (17), the state monitoring module (17) includes an infrared temperature sensor, a microprocessor and an indicator light, and the test point of the infrared temperature sensor is directed to the contact area of the moving and static contacts.

6. A protective disconnector according to claim 5, characterised in that The state monitoring module (17) is further provided with a wireless communication module, which is connected with an external terminal, and the wireless communication module is one of a Wi-Fi module, a Bluetooth module or a mobile cellular network module.

7. A protective disconnector according to claim 6, characterised in that The base (1) and the bracket are provided with through holes, two groups of guide rollers (18) are symmetrically arranged on the through holes of the base (1), and a limiting groove (19) is arranged on the surface of the pull -out handle (7) and the guide roller (18).

8. A protective disconnector according to claim 7, characterised in that The back-shaped cover (8) and the top cover (9) are made of aluminum alloy and are stamped, the front side of the back-shaped cover (8) is provided with a transparent observation window (20), the four corners of the back-shaped cover (8) are provided with mounting blocks, corresponding positions of the mounting blocks and the base (1) are provided with mounting holes, and during specific installation, bolts are penetrated through the mounting holes of the mounting blocks and the base (1).

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