A small DC disconnect switch that is easy to install and remove

Abstract

This utility model provides a small DC disconnect switch that is easy to assemble and disassemble, including an insulating housing, an insulating sleeve and a contact assembly inside the insulating housing, a quick-release mechanism on the side of the insulating housing, a U-shaped groove for installing the disconnect switch on the top of the insulating housing, a sliding groove for installing the disconnect switch on the rear side of the insulating housing, and a switching handle on the front side of the insulating housing. The contact assembly consists of a moving contact, a stationary contact, a contact support, a pressure spring and a conductive bridge, which, together with the switching handle, the switching shaft and the return torsion spring, achieve reliable switching and clear operating feel. The insulating housing has a U-shaped groove with a positioning side hole on the top and a sliding groove with a V-shaped hook on the rear. The quick-release mechanism includes a quick-release plate, a magnetic block, a quick-release slot and a slot side hole, which achieve quick installation and disassembly through magnetic pre-positioning and mechanical locking.

Description

Technical Field

[0001] This utility model relates to the field of disconnect switches, and more specifically, to a small DC disconnect switch that is easy to assemble and disassemble. Background Technology

[0002] DC disconnect switches are fundamental components in DC power distribution systems used to isolate power sources and ensure maintenance safety. They are widely used in small energy storage systems, DC charging piles, and power distribution units of communication base stations.

[0003] Patent application CN205004241U discloses a disconnecting switch comprising a base, an inlet insulating support post, an outlet insulating support post, a moving contact, a stationary contact, a knife switch, and a locking mechanism. The base supports the inlet and outlet insulating supports. The stationary contact is fixed to the outlet insulating support post. The moving contact is fixed to one end of the knife switch, and the other end of the knife switch is hinged to the inlet insulating support post. The moving and stationary contacts abut against each other, electrically connecting the inlet and outlet insulating supports. The locking mechanism is fixed to the outlet insulating support post. Compared with related technologies, the disconnecting switch provided by this invention, through the grooves of the stationary and moving contacts and the locking mechanism, achieves an increased contact area and a secure connection.

[0004] However, existing disconnect switches have some shortcomings that need improvement. Most current disconnect switches use a single bolt-fixed installation method, only compatible with cabinets that have pre-set mounting holes. In miniaturized DC distribution boxes and integrated energy storage PACK cabinets, they cannot be matched with DIN rail quick-installation stations, requiring custom-made adapter brackets for on-site installation, which not only increases material costs but also significantly lengthens the construction period. Furthermore, traditional bolt-locking methods are prone to thread corrosion in outdoor high-humidity and salt spray environments, making subsequent disassembly extremely difficult.

[0005] Traditional disconnect switches are mostly one-piece housings, which require the removal of multiple fixing bolts for disassembly. Moreover, their internal structure is compact, and the surrounding insulating components are easily damaged when cleaning the contacts or replacing the springs. Therefore, this paper proposes an improved version of the existing technology, a small DC disconnect switch that is easy to disassemble and assemble. Utility Model Content

[0006] The purpose of this utility model is to address the problems raised in the existing background technology. To achieve the above-mentioned purpose, this utility model provides the following technical solution: a small DC disconnect switch that is easy to assemble and disassemble, comprising an insulating housing, an insulating sleeve and a contact assembly disposed within the insulating housing, a quick-assembly / disassembly mechanism disposed on the side of the insulating housing, a U-shaped groove for installing the disconnect switch disposed on the top of the insulating housing, a sliding groove for installing the disconnect switch disposed on the rear side of the insulating housing, and a handle for opening and closing the switch disposed on the front side of the insulating housing.

[0007] As a preferred technical solution of this utility model, the quick disassembly and assembly mechanism includes a quick-release buckle plate for the housing, a quick-installation positioning hole, a magnetic block, a quick-installation buckle groove, and a buckle groove side hole.

[0008] As a preferred technical solution of this utility model, the quick-release buckle plate of the housing is detachably connected to the insulating housing. The quick-release buckle plate of the housing is provided with a quick-installation positioning hole. Both the insulating housing and the quick-release buckle plate of the housing are provided with magnetic blocks. The insulating housing is provided with a quick-installation buckle groove, and the side of the quick-installation buckle groove is provided with a buckle groove side hole.

[0009] As a preferred technical solution of this utility model, the contact assembly includes a moving contact and a stationary contact.

[0010] As a preferred embodiment of this utility model, the moving contact and the stationary contact are connected to the contact support, and the moving contact is connected to the contact pressure spring.

[0011] As a preferred technical solution of this utility model, the moving contact is electrically connected with the conductive bridge.

[0012] As a preferred technical solution of this utility model, the side of the U-shaped groove of the disconnecting switch is provided with a U-shaped groove positioning side hole.

[0013] As a preferred technical solution of this utility model, a sliding groove V-shaped hook is provided on the upper side of the sliding groove of the disconnecting switch.

[0014] As a preferred technical solution of this utility model, the opening and closing handle is connected to the opening and closing shaft, and the opening and closing shaft is connected to the opening and closing reset torsion spring.

[0015] As a preferred technical solution of this utility model, an isolation liner is provided inside the insulating shell.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: The magnetic block of this utility model enables the pre-positioning of the quick-release buckle plate on the housing. The buckle and the side hole of the buckle groove form a quick-locking structure, facilitating housing disassembly during daily maintenance and significantly reducing the time spent on cleaning internal contacts and troubleshooting. Magnetic adhesion avoids the problems of stripping and corrosion that are common with traditional bolt installations. The U-shaped groove bolt fixing and V-shaped hook guide rail can match pre-installed mounting bosses or standard electrical guide rails inside the cabinet, eliminating the need for additional custom adapters and adapting to various installation scenarios such as small DC distribution boxes and energy storage PACK cabinets. The U-shaped groove positioning side hole and the sliding groove V-shaped hook achieve dual positioning, eliminating the risk of shaking or displacement after installation. The isolation liner physically separates the functional areas, preventing accidental friction between the opening and closing transmission mechanism and the live contacts, thus extending the contact lifespan. The conductive bridge, reset torsion spring, and other components are integrated inside the insulating housing, maximizing the compression of the overall volume while ensuring electrical safety distances, adapting to the spatial layout requirements of miniaturized DC power distribution systems. Attached Figure Description

[0017] Figure 1 A schematic diagram of the sliding groove V-shaped hook structure provided by this utility model;

[0018] Figure 2 A schematic diagram of the opening and closing reset torsion spring structure provided by this utility model;

[0019] Figure 3 A schematic diagram of the insulating shell structure provided by this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 5 A schematic diagram of the quick-release buckle groove structure provided by this utility model;

[0022] Figure 6 A schematic diagram of the quick-release buckle plate structure for the housing provided by this utility model.

[0023] The image shows:

[0024] 1. Insulating housing; 2. Insulating sleeve; 3. Moving contact; 4. Stationary contact; 5. Contact support; 6. Contact pressure spring; 7. Conductive bridge; 8. Quick-release mechanism; 81. Housing quick-release buckle plate; 82. Quick-release positioning hole; 83. Magnetic block; 84. Quick-release buckle groove; 85. Buckle groove side hole; 9. Disconnecting switch mounting U-shaped groove; 10. U-shaped groove positioning side hole; 11. Disconnecting switch mounting sliding groove; 12. Sliding groove V-shaped hook; 13. Opening and closing handle; 14. Opening and closing shaft; 15. Opening and closing reset torsion spring; 16. Isolation liner. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0026] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] Example 1: A small DC disconnect switch that is easy to assemble and disassemble includes an insulating housing 1, an insulating spacer 2 and a contact assembly inside the insulating housing 1, a quick-release mechanism 8 on the side of the insulating housing 1, a U-shaped groove 9 for installing the disconnect switch on the top of the insulating housing 1, a sliding groove 11 for installing the disconnect switch on the rear side of the insulating housing 1, and a switch handle 13 on the front side of the insulating housing 1. The quick-release mechanism 8 includes a quick-release buckle plate 81, a quick-release positioning hole 82, a magnetic block 83, a quick-release buckle groove 84, and a side hole 85 of the buckle groove.

[0028] The quick-release buckle plate 81 of the housing is detachably connected to the insulating housing 1. The quick-release buckle plate 81 of the housing is provided with a quick-install positioning hole 82. Both the insulating housing 1 and the quick-release buckle plate 81 of the housing are provided with magnetic blocks 83. The insulating housing 1 is provided with a quick-install buckle groove 84. The side of the quick-install buckle groove 84 is provided with a buckle groove side hole 85.

[0029] The contact assembly includes a moving contact 3 and a stationary contact 4. The moving contact 3 and stationary contact 4 are connected to the contact support 5, and the moving contact 3 is connected to the contact pressure spring 6. The moving contact 3 is electrically connected to the conductive bridge 7. A U-shaped groove positioning side hole 10 is provided on the side of the disconnecting switch mounting U-shaped groove 9.

[0030] The upper side of the sliding groove 11 of the disconnecting switch is provided with a sliding groove V-shaped hook 12. The opening and closing handle 13 is connected to the opening and closing shaft 14, and the opening and closing shaft 14 is connected to the opening and closing reset torsion spring 15. An isolation liner 16 is provided inside the insulating housing 1.

[0031] Working principle: The operator operates the opening / closing handle 13, causing the opening / closing shaft 14 to rotate against the torque of the opening / closing reset torsion spring 15. The opening / closing shaft 14 transmits torque to the transmission structure of the moving contact 3. The moving contact 3 rotates around the contact support 5, compressing the contact pressure spring 6, and finally comes into close contact with the stationary contact 4. At this time, the moving contact 3 achieves electrical conduction with the stationary contact 4 through the conductive bridge 7, and the DC circuit is connected. The contact pressure spring 6 provides continuous pressure to ensure tight contact between the moving and stationary contacts and avoids overheating caused by excessive contact resistance.

[0032] After the opening / closing handle 13 is reversed and released, the opening / closing reset torsion spring 15 releases its stored energy, driving the opening / closing shaft 14 to reset. The moving contact 3 loses external force and, with the assistance of the contact pressure spring 6, moves away from the stationary contact 4, completely cutting off the DC circuit. The insulating sleeve 2 and the isolation liner 16 fill the gap between the moving and stationary contacts after they are opened, strengthening the air insulation distance and preventing arcing and accidental creepage.

[0033] Installation process: Embed the external mounting bracket into the U-shaped groove 9 of the disconnect switch installation, and use the U-shaped groove positioning side hole 10 to insert the bolt to complete the initial positioning; or insert the sliding groove V-shaped hook 12 into the slot of the external guide rail, and push the switch along the disconnect switch installation sliding groove 11 to complete the hanging and positioning.

[0034] Locking and fixing: Align the quick-release buckle plate 81 of the housing with the mounting position of the insulating housing 1. The magnetic blocks 83 on the surfaces of both quickly attract each other to achieve pre-positioning. Then, align the buckle on the quick-release buckle plate 81 with the quick-release slot 84 and insert it. The buckle passes through the side hole 85 of the slot to complete the mechanical locking. Combined with the attraction force of the magnetic blocks 83, a tight connection is achieved between the quick-release buckle plate 81 of the housing and the insulating housing 1. At the same time, secondary reinforcement is carried out through the quick-release positioning hole 82 with the external mounting structure, and the installation is completely completed.

[0035] Disassembly procedure: First, release the reinforcing bolts of the quick-release positioning hole 82. Then, press the unlocking buckle of the quick-release buckle plate 81 on the housing to disengage it from the buckle slot side hole 85. Overcoming the magnetic attraction of the magnetic block 83, the quick-release buckle plate 81 on the housing can be quickly removed. Then, slide the switch upward along the isolating switch mounting sliding groove 11 to disengage it from the hook, or loosen the bolts of the U-shaped groove positioning side hole 10 to remove the entire unit from the installation position.

[0036] Workflow: Embed the mounting boss of the external DC cabinet into the U-shaped groove 9 for the isolating switch installation. Use the positioning side hole 10 of the U-shaped groove to pass through and tighten the bolt, initially fixing the switch in the preset position within the cabinet. Align the sliding groove V-shaped hook 12 with the slot of the standard mounting rail and press downwards. After insertion, push the switch along the sliding groove 11 of the isolating switch installation to the designated position. The V-shaped hook engages with the rail slot to achieve pre-fixation. Align the quick-release buckle plate 81 of the housing with the side of the insulating housing 1. The magnetic blocks 83 on the surface of the insulating housing 1 and the quick-release buckle plate 81 quickly attract each other to complete the pre-positioning. Align the buckle plate's buckle with the quick-release buckle slot 84 and insert it. After elastic deformation, the buckle passes through the side hole 85 of the buckle slot and springs back to lock. The magnetic blocks 83 ensure a seamless fit between the buckle plate and the quick-release positioning hole 82. Add bolts for secondary reinforcement, completing the overall installation and locking of the switch. The insulating liner 16 isolates the buckle plate from internal live parts, preventing leakage risks.

[0037] The operator pulls the opening / closing handle 13 downwards, causing the opening / closing shaft 14 to rotate, overcoming the torque reserve of the opening / closing reset torsion spring 15. The opening / closing shaft 14 drives the moving contact 3 to rotate around the contact support 5 via a connecting rod. The moving contact 3 compresses the contact pressure spring 6, moving towards the stationary contact 4 until it is fully engaged. The elastic force of the contact pressure spring 6 maintains a constant contact pressure between the moving and stationary contacts, ensuring reliable electrical connection. The moving contact 3 conducts current to the stationary contact 4 through the conductive bridge 7, officially connecting the DC circuit and putting the equipment into energized operation. The insulating sleeve 2 covers the contact area to prevent external dust and impurities from affecting the contact stability. Pulling the opening / closing handle 13 upwards causes the opening / closing shaft 14 to rotate synchronously, releasing the limit on the moving contact 3. The torsion spring 15 releases torque to drive the opening and closing shaft 14 to reset. Under the reset force of the contact pressure spring 6 and the assistance of the torsion spring, the moving contact 3 quickly moves away from the stationary contact 4, forming an effective insulation gap between the moving and stationary contacts, and the circuit is broken.

[0038] Insulating sleeve 2 and isolation liner 16 fill the break gap to further enhance insulation capacity, prevent DC arc reignition, and completely cut off the circuit. Remove the locking bolts of quick-release positioning hole 82, press the unlock button on quick-release buckle plate 81 of the housing, causing the buckle to retract and disengage from the buckle groove side hole 85, overcoming the attraction force of magnetic block 83, and remove quick-release buckle plate 81 of the housing. For U-slot installation, loosen the bolts in the U-slot positioning side hole 10 and remove the switch as a whole from the mounting boss; for guide rail installation, pull the switch upward to disengage the sliding groove V-shaped hook 12 from the guide rail slot, and pull out the switch to complete the disassembly.

[0039] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A small DC isolating switch which is easy to disassemble and assemble, comprising an insulating housing (1), characterized in that, The insulating housing (1) is provided with an insulating sleeve (2) and a contact assembly. The side of the insulating housing (1) is provided with a quick disassembly and assembly mechanism (8). The top of the insulating housing (1) is provided with a U-shaped groove (9) for installing a disconnecting switch. The rear side of the insulating housing (1) is provided with a sliding groove (11) for installing a disconnecting switch. The front side of the insulating housing (1) is provided with a switch handle (13).

2. The small-sized DC isolating switch convenient to disassemble according to claim 1, characterized in that, The quick-release mechanism (8) includes a quick-release buckle plate (81), a quick-release positioning hole (82), a magnetic block (83), a quick-release buckle groove (84), and a buckle groove side hole (85).

3. The small-sized DC isolating switch convenient to disassemble according to claim 2, characterized in that, The quick-release buckle plate (81) of the housing is detachably connected to the insulating housing (1). The quick-release buckle plate (81) of the housing is provided with a quick-install positioning hole (82). Both the insulating housing (1) and the quick-release buckle plate (81) of the housing are provided with magnetic blocks (83). The insulating housing (1) is provided with a quick-install buckle groove (84). The side of the quick-install buckle groove (84) is provided with a buckle groove side hole (85).

4. The small-sized DC isolating switch convenient to disassemble according to claim 3, characterized in that, The contact assembly includes a moving contact (3) and a stationary contact (4).

5. A small DC disconnect switch that is easy to assemble and disassemble according to claim 4, characterized in that, The moving contact (3) and the stationary contact (4) are connected to the contact support (5), and the moving contact (3) is connected to the contact pressure spring (6).

6. A small DC disconnect switch that is easy to assemble and disassemble according to claim 5, characterized in that, The moving contact (3) is electrically connected to the conductive bridge (7).

7. A small DC disconnect switch that is easy to assemble and disassemble according to claim 6, characterized in that, The side of the U-shaped groove (9) of the disconnecting switch is provided with a U-shaped groove positioning side hole (10).

8. A small DC disconnect switch that is easy to assemble and disassemble according to claim 7, characterized in that, The upper side of the sliding groove (11) of the disconnecting switch is provided with a sliding groove V-shaped hook (12).

9. A small DC disconnect switch that is easy to assemble and disassemble according to claim 8, characterized in that, The opening and closing handle (13) is connected to the opening and closing shaft (14), and the opening and closing shaft (14) is connected to the opening and closing reset torsion spring (15).

10. A small DC disconnect switch that is easy to assemble and disassemble according to claim 9, characterized in that, An insulating liner (16) is provided inside the insulating housing (1).

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