Electric grounding switch

Abstract

The invention relates to the technical field of grounding equipment, in particular to an electric grounding switch which comprises a support, triangular plates are installed at the two ends of the support, a movable blade iron sheet is connected to the triangular plates, a first spring and a second spring are connected to one end of the movable blade iron sheet, the second spring is sleeved with the first spring, and a main shaft is installed between the triangular plates. The top end of the movable cutter iron sheet is provided with a movable cutter, the top of the support is provided with a fixed seat close to the upper portion of the movable cutter, and the top end of the fixed seat is provided with a static cutter. According to the electric grounding switch, the motor arranged in the electric grounding switch can drive the main shaft to rotate so as to drive the moving knife iron sheet to act, so that the action of the moving knife is realized, the closing operation is realized when the moving knife is in contact with the static knife, and the opening operation is realized when the moving knife is separated from the static knife, and the structure is convenient for an operator to remotely control closing and opening; the operation safety is ensured, and the switching-on and switching-off efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grounding equipment, and in particular, to an electric earthing switch. Background Art

[0002] An earthing switch is a mechanical switch for special use with a certain ability to close short-circuit current. It is used to ground the high-voltage switchgear and its line during maintenance to protect personal safety. In addition, due to possible short-circuit faults in the circuit, the earthing switch needs to quickly ground the switchgear to eliminate the fault arc in the switchgear.

[0003] The patent with the publication number CN108695103B provides an earthing switch, including: a frame; a static contact fixed on the frame; a rotating shaft arranged on the frame; a moving contact corresponding to the static contact, one end of the moving contact being fixed on the rotating shaft; wherein, the earthing switch further includes a spring mechanism, one end of the spring mechanism is fixed to the frame through a first rotating shaft, and the other end thereof is fixed to the rotating shaft through a second rotating shaft. When the earthing switch is in the open state, the spring mechanism is used to apply a force to the rotating shaft to keep it in the open position, and during the closing process of the earthing switch, the spring mechanism releases its elastic potential energy to drive the moving contact to move towards the static contact. The closing speed of the earthing switch of the present invention is fast.

[0004] Although the earthing switch of the above technical solution has a fast closing speed, it still needs to be manually opened and closed. Manual operation has certain risks, is not convenient to use, and the manual operation is slow, and the closing and opening operations cannot be carried out in time. Summary of the Invention

[0005] The purpose of the present invention is to provide an electric earthing switch to solve the problems of certain risks in manual operation, inconvenience in use, slow manual operation, and inability to perform closing and opening operations in time as proposed in the above background art.

[0006] To achieve the above purpose, the present invention provides an electric earthing switch, including a bracket, triangular pieces are installed at both ends of the bracket, a moving blade iron piece is connected to the triangular pieces, a first spring and a second spring are connected to one end of the moving blade iron piece, the first spring is sleeved outside the second spring, a main shaft is installed between the triangular pieces, the spring seats of the first spring and the second spring are fixed on the main shaft through a bushing, a moving blade is installed at the top end of the moving blade iron piece, a fixed seat is installed at the top of the bracket near the upper part of the moving blade, a static blade is installed at the top end of the fixed seat, a sensor is installed at the bottom of the fixed seat, a copper pipe is connected between the moving blades, the moving blades are fixed on the copper pipe through copper clips, and an instrument part is installed outside the moving blades.

[0007] Preferably, a motor housing is installed below the bracket, a travel switch is installed at one end of the main shaft, and a gear is installed on the main shaft.

[0008] Preferably, threaded fixing shafts are installed at both ends of the copper pipe, and a grounding wire is externally connected to the outer ends of the threaded fixing shafts through nuts.

[0009] Preferably, one end of the first spring is rotatably connected to the moving knife iron sheet through a spring support shaft, and the other end of the first spring is rotatably connected to the bracket through a spring support column.

[0010] Preferably, the spring seat includes a U-shaped structure formed by two long side plates and a short side plate. One ends of the long side plates are connected through a spring seat fixing shaft, and the end of the spring seat fixing shaft is fixed to the long side plate through a short shaft sleeve.

[0011] Preferably, a signboard is installed on the main shaft.

[0012] Preferably, the top of the moving knife iron sheet is connected to the moving knife through a moving knife fixing shaft. Snap rings and disc springs are installed at both ends of the moving knife fixing shaft, and a disc spring cap is installed at the outer end of the disc spring.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] In this electric earthing switch, the motor provided therein can drive the main shaft to rotate, thereby driving the movement of the moving knife iron sheet and realizing the movement of the moving knife. When the moving knife contacts the static knife, a closing operation is achieved, and when the moving knife separates from the static knife, a tripping operation is achieved. This structure can facilitate remote control of closing and tripping by operators, ensure operation safety, and improve the efficiency of closing and tripping. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view structural schematic diagram of the present invention;

[0016] Figure 2 is a side view structural schematic diagram of the present invention;

[0017] Figure 3 is a top view structural schematic diagram of the present invention.

[0018] The meanings of the various reference numerals in the figure are as follows:

[0019] 1. Sensor; 2. Threaded fixing shaft; 3. Copper tube; 4. Moving knife fixing shaft; 5. Disc spring cap; 6. Snap ring; 7. Disc spring; 8. Moving knife; 9. Stationary knife; 10. Instrument part; 11. Copper clip; 12. Bracket; 13. Moving knife iron sheet; 14. Triangular piece; 15. Spring support shaft; 16. First spring; 17. Second spring; 18. Spring support column; 19. Motor housing; 20. Long side plate; 21. Short side plate; 22. Travel switch; 23. Gear; 24. Sign; 25. Bush; 26. Short bush; 27. Spring seat fixing shaft; 28. Main shaft; 29. Grounding wire. Detailed implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] The present invention provides an electric earthing switch, as Figures 1 - 3 shown, including a bracket 12. Triangular pieces 14 are installed at both ends of the bracket 12. A moving knife iron sheet 13 is connected to the triangular pieces 14. One end of the moving knife iron sheet 13 is connected with a first spring 16 and a second spring 17. The first spring 16 is sleeved outside the second spring 17. The first spring 16 and the second spring 17 are used for the reset of the moving knife iron sheet 13. A main shaft 28 is installed between the triangular pieces 14. The rotation of the main shaft 28 can drive the moving knife iron sheet 13 to act. The spring seats of the first spring 16 and the second spring 17 are fixed on the main shaft 28 through a bush 25. A moving knife 8 is installed at the top end of the moving knife iron sheet 13. A fixed seat is installed at the top of the bracket 12 near the upper part of the moving knife 8. The fixed seat adopts an insulator structure with a relatively large resistance. A stationary knife 9 is installed at the top end of the fixed seat. A sensor 1 is installed at the bottom of the fixed seat. The sensor 1 is a current sensor for detecting current signals. When current is generated at the bottom of the fixed seat, the moving knife 8 contacts the stationary knife 9 to perform the earthing operation. A copper tube 3 is connected between the moving knives 8. The moving knife 8 is fixed on the copper tube 3 through a copper clip 11. An instrument part 10 is installed outside the moving knife 8. The instrument part 10 is an ammeter for detecting the magnitude of the earthing current.

[0022] In this embodiment, a motor housing 19 is installed below the bracket 12. A motor is installed in the motor housing 19. One end of the main shaft 28 is installed with a travel switch 22. A gear 23 is installed on the main shaft 28. The output end of the motor drives the gear 23 to rotate through a driving gear, and then drives the main shaft 28 to rotate. The travel switch 22 controls the rotation stroke of the main shaft 28 so that it can just make the moving knife 8 contact or separate from the stationary knife 9.

[0023] Specifically, threaded fixing shafts 2 are installed at both ends of the copper pipe 3. The outer ends of the threaded fixing shafts 2 are externally connected to the grounding wire 29 through nuts. The outer end of the grounding wire 29 is connected to the ground for grounding the moving blade 8.

[0024] Furthermore, one end of the first spring 16 is rotatably connected to the moving blade iron sheet 13 through a spring support shaft 15, and the other end of the first spring 16 is rotatably connected to the bracket 12 through a spring support column 18, facilitating the installation and fixation of the first spring 16. When the moving blade 8 fails, the moving blade 8 can reset for the opening operation.

[0025] Furthermore, the spring seat includes a U-shaped structure formed by two long side plates 20 and a short side plate 21. One ends of the long side plates 20 are connected through a spring seat fixing shaft 27. The end of the spring seat fixing shaft 27 is fixed on the long side plate 20 through a short shaft sleeve 26, and one end of the first spring 16 is fixed through the spring seat.

[0026] Furthermore, a sign plate 24 is installed on the main shaft 28 for indicating the information of this grounding switch.

[0027] Furthermore, the top of the moving blade iron sheet 13 is connected to the moving blade 8 through a moving blade fixing shaft 4. Snap rings 6 and disc springs 7 are installed at both ends of the moving blade fixing shaft 4. The moving blade 8 is clamped on the moving blade iron sheet 13 through the snap rings 6 and disc springs 7. A disc spring cap 5 is installed at the outer end of the disc spring 7, facilitating the installation and disassembly of the moving blade 8.

[0028] When the electric grounding switch of the present invention is in use, first, assemble the device. Then, connect one end of the static blade 9 to the circuit. When current is generated in the circuit, the motor in the motor housing 19 works to drive the gear 23 to rotate, and then drive the main shaft 28 to rotate. The rotation of the main shaft 28 can drive the moving blade iron sheet 13 to act, and the action of the moving blade iron sheet 13 drives the moving blade 8 to act, that is, to make the moving blade 8 contact the static blade 9. When the moving blade 8 contacts the static blade 9, the current flows from the static blade 9 to the moving blade 8 and is connected to the ground through the grounding wire 29. When grounding is not required, the motor in the motor housing 19 stops working. At this time, the moving blade iron sheet 13 is reset through the first spring 16 and the second spring 17, so that the moving blade 8 is separated from the static blade 9 to achieve the opening operation.

[0029] Finally, it should be noted that for the motor housing 19, etc. in this embodiment, the electronic components in the above components are all common standard parts or components known to those skilled in the art. Their structures and principles can be known by those skilled in the art through technical manuals or obtained through conventional experimental methods. At the idle places of this device, all the above electrical components are respectively connected through wires. The specific connection means should refer to the sequential working order among the electrical components in the above working principle to complete the electrical connection, and they are all well-known technologies in the art.

[0030] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An electric earthing switch, comprising a bracket (12), characterized in that: Triangular pieces (14) are installed at both ends of the bracket (12), a movable knife iron piece (13) is connected to the triangular piece (14), one end of the movable knife iron piece (13) is connected to a first spring (16) and a second spring (17), the first spring (16) is sleeved on the outside of the second spring (17), a main shaft (28) is installed between the triangular pieces (14), the spring seats of the first spring (16) and the second spring (17) are fixed on the main shaft (28) through a shaft sleeve (25), a movable knife (8) is installed on the top of the movable knife iron piece (13), a fixing seat is installed at the top of the bracket (12) near the upper part of the movable knife (8), a static knife (9) is installed on the top of the fixing seat, a sensor (1) is installed at the bottom of the fixing seat, a copper tube (3) is connected between the movable knives (8), the movable knife (8) is fixed on the copper tube (3) through a copper clamp (11), and an instrument component (10) is installed on the outside of the movable knife (8).

2. The electric earthing switch according to claim 1, characterized in that: A motor compartment (19) is installed below the bracket (12), a travel switch (22) is installed on one end of the main shaft (28), and a gear (23) is installed on the main shaft (28).

3. The electric earthing switch according to claim 1, characterized in that: Threaded fixing shafts (2) are installed at both ends of the copper tube (3), and the outer ends of the threaded fixing shafts (2) are externally connected to a grounding wire (29) via nuts.

4. The electric earthing switch according to claim 3, characterized in that: One end of the first spring (16) is rotatably connected to the movable knife iron sheet (13) via a spring support shaft (15), and the other end of the first spring (16) is rotatably connected to the bracket (12) via a spring support column (18).

5. The electric grounding switch according to claim 1, characterized in that: The spring seat comprises a U-shaped structure formed by two long side plates (20) and a short side plate (21), one end of the long side plates (20) being connected via a spring seat fixing shaft (27), and the end of the spring seat fixing shaft (27) being fixed on the long side plate (20) via a short shaft sleeve (26).

6. The electric earthing switch according to claim 1, characterized in that: An indicator plate (24) is mounted on the main shaft (28).

7. The electric grounding switch according to claim 1, characterized in that: The top of the movable knife iron sheet (13) is connected to the movable knife (8) via a movable knife fixing shaft (4), and a retaining spring (6) and a disc spring (7) are installed at both ends of the movable knife fixing shaft (4), and a disc spring cap (5) is installed at the outer end of the disc spring (7).

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