A safety isolation device for secondary devices in smart substations

Abstract

The present invention discloses a safety isolation device for a secondary device of an intelligent substation, comprising a fixing frame, a first insulating column, and a second insulating column. The first insulating column is fixed to the top of the fixing frame, the second insulating column is fixed to the top of the fixing frame, and a conductive block is fixed to the top of each of the first and second insulating columns. In the present invention, a first electric push rod drives the second piston block to move, and the hydraulic oil inside the third hollow rod is injected into the first hollow rod through the second hollow rod. Since the inner diameter of the third hollow rod is larger than that of the first hollow rod, when the hydraulic oil inside the third hollow rod is injected into the first hollow rod, the first piston block moves a greater distance inside the first hollow rod, thereby causing the first piston block to drive the rack to move rapidly, thereby driving the gear to rotate rapidly, causing the conductive rod to rotate rapidly close to the conductive block, thereby reducing the existence time after the arc is generated, thereby reducing the temperature generated by the arc and extending the service life of the conductive rod and the conductive block.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, and in particular to a safety isolation device for a secondary device of an intelligent substation. Background Art

[0002] An isolating switch is a switching device primarily used for isolating power sources, switching operations, and connecting and disconnecting low-current circuits. It lacks arc extinguishing functionality. When in the open position, the isolating switch has a specified insulation distance between its contacts and a clear disconnection mark. In the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions (such as a short circuit) for a specified time.

[0003] When the power diversion of the substation is used, it needs to be connected through an isolating switch, that is, an isolating device. When the diversion route needs to be repaired and maintained, the isolating device is disconnected to ensure that the circuit being repaired is in an open circuit state, thus ensuring the safety during repair and maintenance. However, the existing isolating device has the following shortcomings:

[0004] 1. The isolation device has a certain movement distance when it is opened or closed. When in use, the high voltage of electricity will break through the air within a certain distance, causing an arc to form between the conductors. The arc will not disappear until it moves to a certain range. However, when the arc is generated, high temperature will be generated, causing the conductor to heat up during the movement time of the device. Such high temperature can easily cause heat damage to the conductor, shortening the service life of the device.

[0005] 2. When the isolation device is in use, in order to remove the residual charge inside the equipment after the isolation operation, it is also necessary to control the grounding device for grounding and discharge the residual charge. The grounding control also needs to be performed manually. If the operation is not standardized and the grounding operation is forgotten, direct maintenance at this time still has the risk of electric shock. Therefore, a device is urgently needed to solve the above problem. Summary of the Invention

[0006] The object of the present invention is to provide a safety isolation device for a secondary device of an intelligent substation to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A safety isolation device for a secondary device of a smart substation, comprising a fixed frame, a first insulating column and a second insulating column, wherein the first insulating column is fixed to the top of the fixed frame, and the second insulating column is fixed to the top of the fixed frame. Conductive blocks are fixedly provided on the tops of the first insulating column and the second insulating column, a movable shaft is movably inserted into the inside of the conductive block on one side, a conductive rod is fixedly provided on the outside of the movable shaft, a gear is fixedly provided on one side of the movable shaft, and the gear is made of insulating material, a transmission mechanism for driving the gear to rotate is provided on the top of the fixed frame, and a grounding mechanism for convenient grounding is provided on one side of the fixed frame.

[0008] Preferably, the transmission mechanism includes a first hollow rod, a first piston block, a first spring, a rack, a limiting ring, a second hollow rod, a third hollow rod, a second piston block, a third piston block, a first electric push rod, a connecting block, a rain shield mechanism and a second electric push rod, the first hollow rod is embedded and fixed on the fixing frame, the first piston block is movably clamped inside the first hollow rod, the rack is fixed to the top of the first piston block, the top of the rack is movably extended to the outside of the first hollow rod, the second hollow rod is fixed to the bottom end of the first hollow rod, the third hollow rod is fixed to the bottom end of the second hollow rod, the limiting ring is fixed inside the second hollow rod, the first spring is fixed to the first piston block Between the first electric push rod and the limiting ring, the first electric push rod is fixed to the bottom end inside the third hollow rod, the second piston block is fixed to the extended end of the first electric push rod, the third piston block is movably sealed and clamped inside the second piston block, the connecting block is fixed to the outside of the extended end of the first electric push rod, the second electric push rod is fixed on the connecting block, the extended end of the second electric push rod is fixed to one side of the third piston block, the rain shield mechanism is arranged at the top end of the first hollow rod, and when the isolation device needs to be closed during use, the first electric push rod is started at this time to extend the extended end of the first electric push rod, thereby driving the second electric push rod to move through the connecting block, and the first electric push rod simultaneously drives the second piston The block moves, and the hydraulic oil inside the third hollow rod is injected into the first hollow rod through the second hollow rod. Since the inner diameter of the third hollow rod is larger than that of the first hollow rod, when the hydraulic oil inside the third hollow rod is injected into the first hollow rod, the first piston block moves a farther distance inside the first hollow rod, so that the first piston block drives the rack to move quickly, thereby driving the gear to rotate quickly, causing the conductive rod to rotate quickly and approach the conductive block, thereby reducing the existence time after the arc is generated, thus reducing the temperature generated by the arc and extending the service life of the conductive rod and the conductive block. When the conductive rod and the conductive block are close to a certain distance, the second piston block moves to the top of the third hollow rod, and the second electric push rod moves to the top of the third hollow rod. The rod starts and drives the third piston block to move along the inside of the second hollow rod. Since the inner diameter of the second hollow rod is the same as that of the first hollow rod, the moving speed remains unchanged after the hydraulic oil is injected, so that the conductive rod rotates back to normal speed, thereby preventing damage caused by the rapid closing and collision of the conductive rod and the conductive block. When the first piston block moves, it will stretch the first spring to a stretched state. When opening, the second electric push rod is first started to recover and reset, and then the first electric push rod is started to reset. After that, the first spring drives the first piston block to reset, so that the rack moves downward and drives the gear to rotate in the opposite direction, so that the conductive rod is opened at normal speed first, and then quickly distances itself from the conductive block after disengaging from the conductive block, thereby reducing the arc existence time.

[0009] Preferably, the rain shield mechanism includes a vertical rod and a rain shield, the vertical rod is fixed to the top end of the first hollow rod, and the rain shield is fixed to the top end of the vertical rod. When in use, the rain shield is used to block rainwater, thereby preventing rainwater from accumulating inside the first hollow rod.

[0010] Preferably, the grounding mechanism includes a box body, a support rod, a first limit block, a winding drum, a torsion spring, a conductive column, a conductive wire, a motor, a screw, a positioning rod, a connecting rod, a tapered block, an extension block, a movable rod, a second spring, a second limit block, a trigger rod, a first control switch and a second control switch, the support rod is fixed on the fixed frame, the box body is fixed to the bottom end of the support rod, the conductive column is fixed inside the box body, the conductive column is electrically connected to the conductive block, the winding drum is movably sleeved on the outside of the conductive column, the first limit block is fixed on one side of the conductive column, and the torsion spring is fixed between the first limit block and the conductive wire. The torsion spring is in the shape of a mosquito coil between the electric poles, the conductive wire is wound and arranged on the outside of the winding drum, the conical block is fixed to the bottom end of the conductive wire, the motor is fixed to the top end of the box body, the screw is fixed to the output end of the motor, the positioning rod is fixed to one side of the motor housing, the connecting rod is sleeved on the outside of the screw by a thread, the extension block is fixed to one side of the support rod, the movable rod is movably inserted in the center position of the extension block, the second limit block is fixed to the bottom end of the movable rod, the second spring is fixed between the second limit block and the extension block, the second control switch is embedded and fixed to the top end of the support rod, the first The control switch is embedded and fixed on the top of the movable rod, and the trigger rod is fixed on the top of the rack. When in use, when the isolation device is opened, the rack moves downward, driving the trigger rod to move downward. When the conductive rod is opened to the final state, the rack moves downward and drives the trigger rod to squeeze the second control switch to start the motor. In this way, the motor drives the screw to rotate, causing the connecting rod to move downward along the screw, and the connecting rod drives the conical block to move downward. At this time, the conductive wire is pulled out, driving the winding drum to rotate, thereby tightening the torsion spring until the conical block is inserted into the ground position to complete the grounding work, so that no manual follow-up is required. The grounding operation is performed to prevent residual charge electric shock accidents caused by forgetfulness. When the isolation device is closed, the rack moves upward and when no arc is generated, the trigger rod first contacts the first control switch, causing the motor to rotate in the opposite direction, thereby driving the conical block to separate from the ground position and reset, and the torsion spring reset drives the winding drum to reset, so that the conductive wire is rewound on the outside of the winding drum, which facilitates the storage of the conductive wire when it is idle. After the grounding is released, the rack continues to move upward to lift the first control switch, causing the movable rod to squeeze the second spring. After it is fully closed, the second spring is in a compressed state.

[0011] Preferably, the rack is engaged with the gear, so that when the rack moves up and down, it is convenient to drive the gear to rotate.

[0012] Preferably, the second hollow rod is connected to the interior of the first hollow rod, and the second hollow rod has the same inner diameter as the first hollow rod; the second hollow rod is connected to the third hollow rod, and the inner diameter of the second hollow rod is smaller than that of the third hollow rod.

[0013] Preferably, hydraulic oil is filled between the first piston block and the third piston block.

[0014] Preferably, the connecting rod is movably sleeved on the outside of the positioning rod, one side of the connecting rod is welded and fixed to the top of the conical block, the connecting rod is made of insulating material, and the winding tube is made of conductive material.

[0015] Preferably, the first control switch and the second control switch are both electrically connected to the motor, so as to facilitate starting the motor and controlling the direction of the motor.

[0016] Preferably, the motor is a stepper motor.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the isolation device of the present invention needs to be closed, the first electric push rod is started, so that the extended end of the first electric push rod is extended, thereby driving the second electric push rod to move through the connecting block, and the first electric push rod simultaneously drives the second piston block to move, and the hydraulic oil inside the third hollow rod is injected into the first hollow rod through the second hollow rod. Since the inner diameter of the third hollow rod is larger than that of the first hollow rod, when the hydraulic oil inside the third hollow rod is injected into the first hollow rod, the first piston block moves a farther distance inside the first hollow rod, so that the first piston block drives the rack to move quickly, thereby driving the gear to rotate quickly, causing the conductive rod to rotate quickly close to the conductive block, thereby reducing the existence time of the arc after it is generated, thereby reducing the temperature generated by the arc and extending the service life of the conductive rod and the conductive block;

[0019] 2. When the isolation device of the present invention is opened, the rack moves downward, driving the trigger rod to move downward. When the conductive rod is opened to the final state, the rack moves downward and drives the trigger rod to squeeze the second control switch to start the motor. The motor then drives the screw to rotate, causing the connecting rod to move downward along the screw. The connecting rod drives the conical block to move downward. At this time, the conductive wire is pulled out, driving the winding drum to rotate, thereby tightening the torsion spring until the conical block is inserted into the ground to complete the grounding work. In this way, there is no need for manual grounding operation later, preventing electric shock accidents caused by residual charge caused by forgetfulness;

[0020] 3. When the isolation device of the present invention is closed, the rack moves upward and no arc is generated. At this time, the trigger rod first contacts the first control switch, causing the motor to rotate in the opposite direction, thereby driving the conical block to return to its ground position. The torsion spring resets and drives the winding drum to return to its original position, allowing the conductive wire to be rewound around the outside of the winding drum. This facilitates the storage of the conductive wire when it is not in use.

[0021] 4. When the present invention is turned on, the second electric push rod is first activated to recover and reset, and then the first electric push rod is activated to reset. After that, the first spring drives the first piston block to reset, so that the rack moves downward and drives the gear to rotate in the opposite direction, so that the conductive rod is first opened at a normal speed, and then quickly distances itself from the conductive block after being separated from the conductive block, thereby reducing the arc existence time;

[0022] 5. After the grounding of the present invention is released, the rack continues to move to lift the first control switch upward, causing the movable rod to squeeze the second spring. After being completely closed, the second spring is in a compressed state. When it is opened again, the second spring resets and drives the movable rod to reset. In this way, the first control switch is driven downward and reset by the movable rod, ensuring that the rack can contact the first control switch first when it moves upward, thereby ensuring that the grounding is released before the arc is generated, preventing a large amount of charge from being introduced into the ground and causing danger to the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a side view of the present invention;

[0025] Figure 3 The present invention is attached Figure 1 The enlarged schematic diagram of point B in the middle;

[0026] Figure 4 It is a cross-sectional view of the present invention;

[0027] Figure 5 It is a cross-sectional view of the box body of the present invention;

[0028] Figure 6 The present invention is attached Figure 4 Enlarged schematic diagram of point A in the middle.

[0029] In the figure: 1, fixed frame; 2, first insulating column; 3, second insulating column; 4, conductive block; 5, movable shaft; 6, conductive rod; 7, gear; 8, first hollow rod; 9, vertical rod; 10, rain shield; 11, rack; 12, first piston block; 13, first spring; 14, second hollow rod; 15, third hollow rod; 16, second piston block; 17, third piston block; 18, first electric push rod; 19, connecting block; 20, second electric Push rod; 21. Limiting ring; 22. Box body; 23. Movable rod; 24. First control switch; 25. Second limiting block; 26. Second control switch; 27. Second spring; 28. Support rod; 29. ​​Trigger rod; 30. Extension block; 31. Conductive column; 32. Winding tube; 33. Conductive wire; 34. Torsion spring; 35. First limiting block; 36. Conical block; 37. Screw; 38. Positioning rod; 39. Connecting rod; 40. Motor. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1-6 The present invention provides a technical solution: a safety isolation device for a secondary device of a smart substation, comprising a fixing frame 1, a first insulating column 2 and a second insulating column 3. The first insulating column 2 is fixed to the top of the fixing frame 1 by bolts, and the second insulating column 3 is fixed to the top of the fixing frame 1 by bolts. A conductive block 4 is fixed to the top of each of the first insulating column 2 and the second insulating column 3 by bolts. A movable shaft 5 is movably inserted into the inside of the conductive block 4 on one side, and a conductive rod 6 is welded and fixed to the outside of the movable shaft 5. A gear 7 is welded and fixed to one side of the movable shaft 5. The gear 7 is made of insulating material. A transmission mechanism for driving the gear 7 to rotate is provided at the top of the fixing frame 1, and a grounding mechanism for convenient grounding is provided on one side of the fixing frame 1.

[0032] The transmission mechanism includes a first hollow rod 8, a first piston block 12, a first spring 13, a rack 11, a limiting ring 21, a second hollow rod 14, a third hollow rod 15, a second piston block 16, a third piston block 17, a first electric push rod 18, a connecting block 19, a rainproof mechanism and a second electric push rod 20. The first hollow rod 8 is embedded and fixed on the fixed frame 1, and the first piston block 12 is movably connected to the inside of the first hollow rod 8. The rack 11 is welded and fixed to the top of the first piston block 12. The top of the rack 11 is movably extended to the outside of the first hollow rod 8, and the rack 11 is engaged with the gear 7, so that when the rack 11 moves up and down, it is convenient to drive the gear 7 to rotate. The second hollow rod 14 is welded and fixed to the bottom end of the first hollow rod 8, and the third hollow rod 15 is welded and fixed at At the bottom end of the second hollow rod 14, a limiting ring 21 is welded and fixed inside the second hollow rod 14, the first spring 13 is welded and fixed between the first piston block 12 and the limiting ring 21, the second hollow rod 14 is connected to the inside of the first hollow rod 8, and the second hollow rod 14 has the same inner diameter as the first hollow rod 8, the second hollow rod 14 is connected to the third hollow rod 15, and the inner diameter of the second hollow rod 14 is smaller than the inner diameter of the third hollow rod 15, the first electric push rod 18 is fixed to the bottom end of the third hollow rod 15 through the mounting bracket, the second piston block 16 is welded and fixed to the extended end of the first electric push rod 18, the third piston block 17 is movably sealed and clamped inside the second piston block 16, the connecting block 19 is welded and fixed to the outside of the extended end of the first electric push rod 18, the second electric push rod 20 It is fixed to the connecting block 19 by bolts, and the extended end of the second electric push rod 20 is welded and fixed to one side of the third piston block 17. Hydraulic oil is filled between the first piston block 12 and the third piston block 17. The rainproof mechanism is at the top of the first hollow rod 8. When the isolation device needs to be closed during use, the first electric push rod 18 is started at this time, so that the extended end of the first electric push rod 18 is extended, so that the second electric push rod 20 is driven to move through the connecting block 19, and the first electric push rod 18 simultaneously drives the second piston block 16 to move, and the hydraulic oil inside the third hollow rod 15 is injected into the first hollow rod 8 through the second hollow rod 14. Since the inner diameter of the third hollow rod 15 is larger than that of the first hollow rod 8, when the hydraulic oil inside the third hollow rod 15 is injected into the first hollow rod 8, the third hollow rod 15 is opened. A piston block 12 moves a greater distance inside the first hollow rod 8, so that the first piston block 12 drives the rack 11 to move quickly, thereby driving the gear 7 to rotate quickly, causing the conductive rod 6 to rotate quickly close to the conductive block 4, thereby reducing the existence time after the arc is generated, thereby reducing the temperature generated by the arc and extending the service life of the conductive rod 6 and the conductive block 4. When the conductive rod 6 and the conductive block 4 are close to a certain distance, the second piston block 16 moves to the top of the third hollow rod 15, and the second electric push rod 20 starts to drive the third piston block 17 to move along the inside of the second hollow rod 14. Since the second hollow rod 14 has the same inner diameter as the first hollow rod 8, the moving speed remains unchanged after the hydraulic oil is injected, so that the rotation of the conductive rod 6 returns to normal speed.This prevents damage caused by the rapid closing and collision of the conductive rod 6 and the conductive block 4. When the first piston block 12 moves, it stretches the first spring 13 to a stretched state. When opening, the second electric push rod 20 is first activated to retract and reset, and then the first electric push rod 18 is activated to reset. After that, the first spring 13 drives the first piston block 12 to reset. This causes the rack 11 to move downward and the gear 7 to rotate in the opposite direction, causing the conductive rod 6 to open at normal speed first, and then quickly distance itself from the conductive block 4 after disengaging from it, reducing the arc existence time.

[0033] The rain shield mechanism includes a vertical rod 9 and a rain shield 10. The vertical rod 9 is welded and fixed to the top of the first hollow rod 8. The rain shield 10 is welded and fixed to the top of the vertical rod 9. When in use, the rain shield 10 blocks rainwater, thus preventing rainwater from accumulating inside the first hollow rod 8.

[0034] The grounding mechanism includes a box body 22, a support rod 28, a first limit block 35, a winding drum 32, a torsion spring 34, a conductive column 31, a conductive wire 33, a motor 40, a screw 37, a positioning rod 38, a connecting rod 39, a tapered block 36, an extension block 30, a movable rod 23, a second spring 27, a second limit block 25, a trigger rod 29, a first control switch 24 and a second control switch 26. The support rod 28 is welded and fixed to the fixed frame 1, the box body 22 is welded and fixed to the bottom end of the support rod 28, the conductive column 31 is welded and fixed to the inside of the box body 22, the conductive column 31 is electrically connected to the conductive block 4, the winding drum 32 is movably sleeved on the outside of the conductive column 31, the first limit block 35 is welded and fixed to one side of the conductive column 31, and the torsion spring 34 is welded and fixed to the first limit block 35 and the conductive column 31, the torsion spring 34 is in the shape of a mosquito coil, the conductive wire 33 is wound around the outside of the winding tube 32, the tapered block 36 is welded and fixed to the bottom of the conductive wire 33, the motor 40 is fixed to the top of the box body 22 through the mounting bracket, the motor 40 is a stepping motor, the screw 37 is fixed to the output end of the motor 40 through a coupling, the positioning rod 38 is fixed to one side of the motor 40 housing by a bolt, the connecting rod 39 is sleeved on the outside of the screw 37 through a thread, the connecting rod 39 is movably sleeved on the outside of the positioning rod 38, one side of the connecting rod 39 is welded and fixed to the top of the tapered block 36, the connecting rod 39 is made of insulating material, the winding tube 32 is made of conductive material, the extension block 30 is welded and fixed to one side of the support rod 28, the movable rod 23 is movably inserted in the center position of the extension block 30, and the second limit block 25 is welded and fixed to the movable At the bottom end of the movable rod 23, the second spring 27 is welded and fixed between the second limit block 25 and the extension block 30, the second control switch 26 is embedded and fixed on the top of the support rod 28, the first control switch 24 is embedded and fixed on the top of the movable rod 23, and the trigger rod 29 is welded and fixed on the top of the rack 11. The first control switch 24 and the second control switch 26 are both electrically connected to the motor 40, which is convenient for starting the motor 40 and controlling the steering of the motor 40. When in use, when the isolation device is opened, the rack 11 moves downward, driving the trigger rod 29 to move downward. When the conductive rod 6 is opened to the final state, the rack 11 moves downward and drives the trigger rod 29 to squeeze the second control switch 26 to start the motor 40. In this way, the motor 40 drives the screw 37 to rotate, so that the connecting rod 39 moves along the screw The rod 37 moves downward, and the connecting rod 39 drives the conical block 36 to move downward. At this time, the conductive wire 33 is pulled out, driving the winding drum 32 to rotate, so that the torsion spring 34 is tightened until the conical block 36 is inserted into the ground position to complete the grounding work. In this way, there is no need for manual grounding operation to prevent residual charge electric shock accidents caused by forgetfulness. When the isolation device is closed, the rack 11 moves upward and when no arc is generated, the trigger rod 29 first contacts the first control switch 24, causing the motor 40 to rotate in the opposite direction, thereby driving the conical block 36 to reset from the ground position, and the torsion spring 34 resets and drives the winding drum 32 to reset, so that the conductive wire 33 is rewound on the outside of the winding drum 32, which facilitates the storage of the conductive wire 33 when it is idle. After the grounding is released,At this time, the rack 11 continues to move upward, lifting the first control switch 24, causing the movable rod 23 to squeeze the second spring 27. After being fully closed, the second spring 27 is now compressed. When it is opened again, the second spring 27 resets, driving the movable rod 23 back to its original position. This, in turn, drives the first control switch 24 downward and resets via the movable rod 23. This ensures that when the rack 11 moves upward, it first contacts the first control switch 24, thereby ensuring that the grounding is released before an arc is generated, preventing a large amount of charge from being introduced into the ground and causing danger to the surrounding environment.

[0035] Working principle: when the isolation device needs to be closed during use, the first electric push rod 18 is started, so that the extended end of the first electric push rod 18 is extended, so that the second electric push rod 20 is driven to move through the connecting block 19, and the first electric push rod 18 simultaneously drives the second piston block 16 to move, and the hydraulic oil inside the third hollow rod 15 is injected into the first hollow rod 8 through the second hollow rod 14. Since the inner diameter of the third hollow rod 15 is larger than that of the first hollow rod 8, when the hydraulic oil inside the third hollow rod 15 is injected into the first hollow rod 8, the first piston block 12 moves a farther distance inside the first hollow rod 8, so that the first piston block 12 drives the rack 11 to move quickly, thereby driving the gear 7 to rotate quickly, causing the conductive rod 6 to rotate quickly close to the conductive block 4, thereby reducing the existence time after the arc is generated, thereby reducing the temperature generated by the arc, extending the service life of the conductive rod 6 and the conductive block 4, and when the conductive After the rod 6 and the conductive block 4 are close to a certain distance, the second piston block 16 moves to the top of the third hollow rod 15, and the second electric push rod 20 is started to drive the third piston block 17 to move along the inside of the second hollow rod 14. Since the second hollow rod 14 has the same inner diameter as the first hollow rod 8, the moving speed remains unchanged after the hydraulic oil is injected, so that the conductive rod 6 rotates back to normal speed, thereby preventing damage caused by the rapid closing and collision of the conductive rod 6 and the conductive block 4. When the first piston block 12 moves, the first spring 13 is stretched to a stretched state. When opening, the second electric push rod 20 is first started to recover and reset, and then the first electric push rod 18 is started to reset. After that, the first spring 13 drives the first piston block 12 to reset, so that the rack 11 moves downward and drives the gear 7 to rotate in the opposite direction, so that the conductive rod 6 first opens at normal speed, and then quickly pulls away from the conductive block 4 after disengaging from the conductive block 4, reducing the arc existence time;

[0036] When the isolation device is opened during use, the rack 11 moves downward, driving the trigger rod 29 to move downward. When the conductive rod 6 is opened to the final state, the rack 11 moves downward, driving the trigger rod 29 to squeeze the second control switch 26 to start the motor 40. In this way, the motor 40 drives the screw 37 to rotate, causing the connecting rod 39 to move downward along the screw 37. The connecting rod 39 drives the conical block 36 to move downward. At this time, the conductive wire 33 is pulled out, driving the winding drum 32 to rotate, thereby tightening the torsion spring 34 until the conical block 36 is inserted into the ground position to complete the grounding work. In this way, there is no need for manual subsequent grounding operations to prevent forgetting. In the event of a residual charge electric shock accident, when the isolation device is closed, the rack 11 moves upward and no arc is generated. At this time, the trigger rod 29 first contacts the first control switch 24, causing the motor 40 to rotate in the opposite direction, thereby driving the conical block 36 to reset from the ground position, and the torsion spring 34 resets and drives the winding drum 32 to reset, so that the conductive wire 33 is rewound on the outside of the winding drum 32, which facilitates the storage of the conductive wire 33 when idle. After the grounding is released, the rack 11 continues to move upward to lift the first control switch 24, causing the movable rod 23 to squeeze the second spring 27. After it is fully closed, the second spring 27 is in a compressed state.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A safety isolation device for a secondary device of an intelligent substation, comprising a fixing frame (1), a first insulating column (2) and a second insulating column (3), characterized in that: The first insulating column (2) is fixed to the top of the fixing frame (1), and the second insulating column (3) is fixed to the top of the fixing frame (1). A conductive block (4) is fixedly provided on the top of each of the first insulating column (2) and the second insulating column (3). A movable shaft (5) is movably inserted into the inside of the conductive block (4) on one side, and a conductive rod (6) is fixedly provided on the outside of the movable shaft (5). A gear (7) is fixedly provided on one side of the movable shaft (5), and the gear (7) is made of insulating material. A transmission mechanism for driving the gear (7) to rotate is provided on the top of the fixing frame (1), and a grounding mechanism for convenient grounding is provided on one side of the fixing frame (1); The transmission mechanism comprises a first hollow rod (8), a first piston block (12), a first spring (13), a rack (11), a limiting ring (21), a second hollow rod (14), a third hollow rod (15), a second piston block (16), a third piston block (17), a first electric push rod (18), a connecting block (19), a rain shield mechanism and a second electric push rod (20), wherein the first hollow rod (8) is embedded and fixed on the fixing frame (1), the first piston block (12) is movably connected to the inside of the first hollow rod (8), the rack (11) is fixed to the top end of the first piston block (12), the top end of the rack (11) is movably extended to the outside of the first hollow rod (8), the second hollow rod (14) is fixed to the bottom end of the first hollow rod (8), and the third hollow rod (15) is fixed to the bottom end of the first hollow rod (8). The first spring (13) is fixed at the bottom end of the second hollow rod (14), the limiting ring (21) is fixed inside the second hollow rod (14), the first spring (13) is fixed between the first piston block (12) and the limiting ring (21), the first electric push rod (18) is fixed at the bottom end inside the third hollow rod (15), the second piston block (16) is fixed at the extended end of the first electric push rod (18), the third piston block (17) is movably sealed and clamped inside the second piston block (16), the connecting block (19) is fixed on the outside of the extended end of the first electric push rod (18), the second electric push rod (20) is fixed on the connecting block (19), the extended end of the second electric push rod (20) is fixed on one side of the third piston block (17), and the rain shielding mechanism is arranged at the top end of the first hollow rod (8); The grounding mechanism comprises a box body (22), a support rod (28), a first limiting block (35), a winding cylinder (32), a torsion spring (34), a conductive column (31), a conductive wire (33), a motor (40), a screw rod (37), a positioning rod (38), a connecting rod (39), a tapered block (36), an extension block (30), a movable rod (23), a second spring (27), a second limiting block (25), a trigger rod (29), a first control switch (24) and a second control switch (2 6), the support rod (28) is fixed on the fixing frame (1), the box body (22) is fixed on the bottom end of the support rod (28), the conductive column (31) is fixed inside the box body (22), the conductive column (31) is electrically connected to the conductive block (4), the winding tube (32) is movably sleeved on the outside of the conductive column (31), the first limit block (35) is fixed on one side of the conductive column (31), and the torsion spring (34) is fixed between the first limit block (35) and the conductive column (31), The torsion spring (34) is in the shape of a mosquito coil, the conductive wire (33) is wound and arranged on the outside of the winding cylinder (32), the conical block (36) is fixed to the bottom end of the conductive wire (33), the motor (40) is fixed to the top end inside the box body (22), the screw (37) is fixed to the output end of the motor (40), the positioning rod (38) is fixed to one side of the motor (40) housing, the connecting rod (39) is connected to the outside of the screw (37) through a threaded sleeve, and the extension block (30) is fixed to the support rod. (28) side, the movable rod (23) is movably inserted in the center position of the extension block (30), the second limit block (25) is fixed at the bottom end of the movable rod (23), the second spring (27) is fixed between the second limit block (25) and the extension block (30), the second control switch (26) is embedded and fixed at the top end of the support rod (28), the first control switch (24) is embedded and fixed at the top end of the movable rod (23), and the trigger rod (29) is fixed at the top end of the rack (11); Hydraulic oil is filled between the first piston block (12) and the third piston block (17).

2. A safety isolation device for a secondary device of a smart substation according to claim 1, characterized in that: The rain shield mechanism comprises a vertical rod (9) and a rain shield (10), wherein the vertical rod (9) is fixed to the top end of the first hollow rod (8), and the rain shield (10) is fixed to the top end of the vertical rod (9).

3. A safety isolation device for a secondary device of a smart substation according to claim 2, characterized in that: The rack (11) is meshed with the gear (7).

4. A safety isolation device for a secondary device of a smart substation according to claim 3, characterized in that: The second hollow rod (14) is connected to the interior of the first hollow rod (8), and the second hollow rod (14) has the same inner diameter as the first hollow rod (8); the second hollow rod (14) is connected to the third hollow rod (15), and the inner diameter of the second hollow rod (14) is smaller than the inner diameter of the third hollow rod (15).

5. A safety isolation device for a secondary device of a smart substation according to claim 4, characterized in that: The connecting rod (39) is movably sleeved on the outside of the positioning rod (38), and one side of the connecting rod (39) is welded and fixed to the top of the conical block (36). The connecting rod (39) is made of insulating material, and the winding tube (32) is made of conductive material.

6. A safety isolation device for a secondary device of a smart substation according to claim 5, characterized in that: The first control switch (24) and the second control switch (26) are both electrically connected to the motor (40).

7. A safety isolation device for a secondary device of a smart substation according to claim 6, characterized in that: The motor (40) is a stepping motor.

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