Quick-assembly intelligent high-voltage disconnector

Abstract

The application relates to the technical field of high-voltage switch devices, in particular to a fast-closing type intelligent high-voltage isolating switch which comprises a base frame, at least two insulators are fixedly arranged on the base frame, the top ends of the insulators are respectively fixedly connected with contact seat, the top portions of the contact seats are respectively connected with wiring seats, and the fast-closing type intelligent high-voltage isolating switch further comprises: a static contact assembly which is installed on one of the wiring seats and comprises a static contact conducting seat, the top portion of the static contact conducting seat is provided with a conical guide section; a moving contact assembly which is installed on the other wiring seat and comprises a contact blade, one end of the contact blade is rotationally connected to the corresponding wiring seat through a rotating pin, the other end of the contact blade is connected with an arc-shaped contact finger which is matched with the static contact conducting seat through a universal assembly; and a transmission assembly which comprises a transmission handle which is fixedly connected to the outer surface of the rotating pin and a longitudinal groove connecting block which is slidingly connected to the outer surface of the transmission handle, and linear movement of the longitudinal groove connecting block drives the rotating pin to rotate through pin-groove cooperation.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear technology, specifically to a fast-closing intelligent high-voltage disconnector. Background Technology

[0002] High-voltage disconnect switches are important switching devices in power systems used to isolate power sources and switch circuits. Their core performance indicators include closing speed, contact reliability, mechanical life, and operational safety.

[0003] The following technical problems are commonly found in existing high-voltage disconnect switches: As illustrated in the existing patent document CN111799123B, the alignment between the moving and stationary contacts of this traditional disconnecting switch relies entirely on the machining precision of the components and on-site assembly and debugging. Even a slight axial deviation or installation error can lead to problems such as contact wear, increased contact resistance, and localized overheating, and in severe cases, even contact welding accidents. To meet the alignment requirements, manufacturers have to adopt high-precision machining and complex on-site debugging procedures, significantly increasing manufacturing and maintenance costs.

[0004] As described in patent document CN111710541A, this conventional disconnecting switch uses a motor to directly drive the contact blades to rotate and close the circuit breaker via a reducer. The direct motor-driven method results in slow closing speeds, and under high current conditions, pre-breakdown arcs are easily generated between the contacts during closing, burning the contact surfaces. While a single-stage spring operating mechanism can improve closing speed, it needs to overcome static friction and inertial forces in the initial closing stage. Poor matching between the spring output and load characteristics leads to insufficient output torque in the initial closing stage, preventing true fast closing. Furthermore, the single-stage spring mechanism cannot precisely control the final contact pressure at the end of the closing phase, making it difficult to guarantee contact reliability.

[0005] Therefore, this application proposes a fast-closing intelligent high-voltage disconnect switch. Summary of the Invention

[0006] The purpose of this invention is to provide a fast-closing intelligent high-voltage disconnect switch to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fast-closing intelligent high-voltage disconnecting switch, comprising a base frame, on which at least two insulators are fixedly mounted, and a contact seat is fixedly connected to the top of each insulator, and a terminal block is connected to the top of each contact seat, further comprising: A stationary contact assembly, mounted on one of the terminal blocks, includes a stationary contact conductive base, the top of which is provided with a tapered guide section; The moving contact assembly, mounted on another terminal block, includes a contact blade, one end of which is rotatably connected to the corresponding terminal block via a pivot pin, and the other end of which is connected to an arc-shaped contact finger adapted to the stationary contact conductive base via a universal assembly. The transmission assembly includes a transmission handle fixedly connected to the outer surface of the pivot pin, and a longitudinal groove connecting block slidably connected to the outer surface of the transmission handle. The linear movement of the longitudinal groove connecting block drives the pivot pin to rotate through the pin groove engagement. A two-stage energy storage drive mechanism includes a power source, a transmission rod driven by the power source, and a first energy storage component and a second energy storage component connected in series on the transmission path, with the second energy storage component being close to the load end; The push rod has one end connected to the energy storage component side near the load end and the other end connected to the longitudinal groove connecting block; The locking and tiered release mechanism includes a locking rocker arm, on which a first locking part and a second locking part are provided, which are releasably locked to components on the first energy storage device side and components on the second energy storage device side, respectively, and are configured to release the locking of components on the first energy storage device side and components on the second energy storage device side in a preset timing sequence.

[0008] Preferably, the stationary contact conductive base is a hollow cylindrical conductive body, which is fixedly installed above the corresponding terminal block, and its inner cavity opening end is provided with a tapered surface that gradually narrows from the port inward to form the tapered guide section.

[0009] Preferably, the universal assembly includes: a contact conductive rod, one end of which is fixedly connected to the end of the contact blade away from the pivot pin; a ball head seat, fixedly connected to the other end of the contact conductive rod, the ball head seat having a spherical cavity; a ball head body, the ball head portion of which is housed in the spherical cavity and forms a spherical kinematic pair therewith, the rod portion of which extends outward from the ball head seat; and a contact frame, fixedly connected to the rod end face of the ball head body, the arc-shaped contact finger being mounted on the outer circumferential surface of the contact frame.

[0010] Preferably, the contact frame is a cylindrical body with a plurality of axially extending grooves evenly formed on its outer circumference; a contact guide block is slidably connected in each groove, and the contact guide block can slide radially along the depth direction of the groove; the arc-shaped contact finger is fixedly installed on the radially outer side of the contact guide block; a contact finger spring is provided between the radially inner side of each contact guide block and the bottom wall of the corresponding groove.

[0011] Preferably, the outer surface of the arc-shaped contact finger is a convex arc surface, and the radius of curvature of the convex arc surface is greater than the inner wall radius of the cylindrical section of the stationary contact conductive seat. During the closing insertion process, the convex arc surface of the arc-shaped contact finger first makes single-point contact with the conical surface of the conical guide section. The conical surface generates a normal reaction force on the convex arc surface. This normal reaction force can be decomposed into an axial component and a circumferential component. The circumferential component drives the contact frame to rotate and fine-tune until each of the arc-shaped contact fingers is uniformly attached to the inner wall of the stationary contact conductive seat along the circumference, thereby achieving adaptive centering.

[0012] Preferably, the dual-stage energy storage drive mechanism further includes: a sliding frame, fixedly mounted on the base frame or an independent support structure, the sliding frame having a sliding guide surface extending along its axial direction; a release slider assembly, including a nut drive block, a spring seat, and an auxiliary release slider, which are sequentially slidably mounted along the axial direction of the sliding frame from the power source side to the load side, all three of which can slide independently along the axial direction of the sliding frame; wherein, the first energy storage component is a main energy storage spring, with its two ends abutting against the nut drive block and the spring seat respectively; the second energy storage component is an auxiliary acceleration spring, with its two ends abutting against the spring seat and the auxiliary release slider respectively; one end of the push rod is fixedly connected to the auxiliary release slider, and the other end of the push rod is hinged to the longitudinal groove connecting block.

[0013] Preferably, the power source includes a servo motor and a reducer that is driven by the output shaft of the servo motor; the transmission rod is connected to the output end of the reducer, and the outer surface of the transmission rod is divided into a threaded section and a smooth section along its axial direction. The threaded section is located on the side closer to the power source, and the smooth section is located on the side farther from the power source; the inner wall of the central through hole of the nut drive block is provided with an internal thread, which forms a threaded transmission pair with the threaded section of the transmission rod, so that the nut drive block is driven to move axially when the transmission rod rotates; the central through holes of the spring seat and the auxiliary release slider are both smooth holes, and both are slidably sleeved on the smooth section of the transmission rod, so that the spring seat and the auxiliary release slider can slide freely along the axial direction on the smooth section without being directly driven by the rotation of the transmission rod.

[0014] Preferably, the locking and tiered release mechanism further includes: a side frame, fixedly disposed on the side of the sliding frame and extending parallel to the axial direction of the sliding frame; a locking rocker arm is hinged to the end of the side frame away from the power source via a hinge shaft, and the locking rocker arm can swing around the hinge shaft in a plane perpendicular to the axial direction of the sliding frame; the first locking part includes a locking pin, which is fixedly disposed on the surface of the locking rocker arm facing the auxiliary release slider; the second locking part includes a latch, which is fixedly disposed on the surface of the locking rocker arm facing the spring seat; the component on the first energy storage component side is the auxiliary release slider, which has a latch groove, and the latch groove and the locking pin form a releasable plug-in lock when the energy storage is completed; the component on the second energy storage component side is the spring seat, which has a limiting groove extending axially, the limiting groove being a straight groove with a preset axial length, and the latch extending into the limiting groove and sliding axially within the limiting groove.

[0015] Preferably, it further includes a trigger release mechanism for driving the locking rocker arm to swing in a preset sequence to release stored energy in stages. The trigger release mechanism includes: a trigger cam, rotatably mounted on one end of the pivot pin, the outer peripheral surface of the trigger cam being composed of a semi-circular arc surface and at least one cam surface protruding radially from the semi-circular arc surface, and a set of teeth fixedly provided on the semi-circular arc surface; a drive gear, rotatably mounted on one side of the trigger cam and meshing with the set of teeth; a drive motor, the output shaft of which is connected to the drive gear for driving the drive gear to rotate and thus drive the trigger cam to rotate; a drive swing arm, one end of which is provided with a contact wheel, the contact wheel being located on the movement path of the cam surface of the trigger cam and abutting against the rotating cam surface; a torsion spring rod, elastically connected to the middle of the drive swing arm, for providing an elastic torque to reset the drive swing arm; one side of the drive swing arm and the end of the locking rocker arm away from the hinge axis form an abutting engagement relationship.

[0016] Preferably, it further includes an end-of-stroke damping device for applying progressive damping to the movement of the push rod before the moving contact assembly contacts the stationary contact assembly. The end-of-stroke damping device includes: a flexible oil reservoir sleeve fixedly fitted at the position corresponding to the end of the push rod's stroke; the inner wall of the flexible oil reservoir sleeve is made of a flexible, deformable material, and its interior is sealed with a damping medium; a gradually tapered section constructed on the outer surface of the push rod, with its radial dimension gradually increasing along the closing movement direction of the push rod; and multiple damping chambers spaced circumferentially on the outer peripheral wall of the flexible oil reservoir sleeve. The damping chamber is connected to the inner cavity of the flexible oil storage sleeve through a throttling orifice, the cross-sectional area of ​​which is smaller than that of the inner cavity. Multiple movable rods are circumferentially spaced and radially slidably inserted into the wall of the flexible oil storage sleeve. The inner end of each movable rod extends into the inner cavity of the flexible oil storage sleeve and is fixedly connected to a pressure plate, which is attached to the inner wall of the flexible oil storage sleeve to provide support. Multiple springs are correspondingly sleeved on the outer surface of each movable rod, one end of which abuts against the outer end step surface of the movable rod, and the other end abuts against the outer wall surface of the damping chamber.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. By cooperating with the tapered guide section and the arc-shaped contact finger with the convex arc surface, the centering and fine adjustment of the contact frame is automatically realized during the closing process. This makes the centering accuracy no longer dependent on the machining accuracy of parts and assembly debugging, which significantly reduces the manufacturing difficulty and on-site operation and maintenance costs, while improving contact reliability and consistency.

[0018] 2. The auxiliary acceleration spring releases first to provide a high-acceleration impact torque, effectively overcoming static friction and inertia; the main energy storage spring then releases to provide continuous driving force, completing the stroke and establishing final contact pressure. The two-stage driving force characteristics are highly matched with the actual closing load characteristics, resulting in fast closing speed and reliable operation.

[0019] 3. By designing the cam surface profile of the trigger cam, the timing of the disengagement of the locking pin and the catch pin can be precisely controlled, ensuring that the sequence and phase difference of the graded release can be preset and repeated, thus improving the consistency and reliability of the operation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the blade in this invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the structure of the stationary contact conductive base in this invention; Figure 5 This is a schematic diagram of the reducer in this invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the transfer pin structure in this invention; Figure 8 This is a schematic diagram of the transmission rod in this invention; Figure 9 This is a schematic diagram of the push rod structure in this invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram at point C; Figure 11 This is a schematic diagram of the structure of the oil storage cushion sleeve and the gradually tapered surface section in this invention; Figure 12 This is a schematic diagram of the structure of the oil storage cushion sleeve in this invention.

[0021] In the diagram: 100, base frame; 101, insulator; 102, contact seat; 200, contact blade; 201, terminal block; 202, stationary contact conductive seat; 203, contact conductive rod; 204, ball head seat; 205, ball head body; 206, contact frame; 207, contact guide block; 208, arc-shaped contact finger; 209, contact finger spring; 210, pivot pin; 300, transmission handle; 301, contact wheel; 302, push rod; 303, longitudinal slot connecting block; 304, servo motor; 305, reducer; 306, transmission rod; 307, nut drive block; 308, main energy storage spring; 309 310. Spring seat; 311. Auxiliary acceleration spring; 312. Auxiliary release slider; 313. Sliding frame; 314. Side frame; 315. Locking rocker arm; 316. Locking pin; 317. Slot; 318. Limiting slot; 319. Locking pin; 320. Drive swing arm; 321. Torsion spring rod; 322. Trigger cam; 323. Gear assembly; 324. Drive gear; 425. Drive motor; 400. Oil reservoir soft pad sleeve; 401. Support frame; 402. Gradient conical section; 403. Damping chamber; 404. Movable rod; 405. Pressure plate; 406. Throttling orifice; 407. Spring. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1 - Figure 12 The present invention provides a technical solution: a fast-closing intelligent high-voltage disconnect switch. The fast-closing intelligent high-voltage disconnect switch in this embodiment includes a base frame 100, an insulator 101, a contact seat 102, a terminal block 201, a stationary contact assembly, a moving contact assembly, a transmission assembly, a two-stage energy storage drive mechanism, a locking and graded release mechanism, a trigger release mechanism, and an end buffer damping device.

[0024] The base frame 100 serves as the main support structure for the switch, constructed from welded or bolted steel sections, providing sufficient structural rigidity and strength. At least two insulators 101 are fixedly installed at horizontal intervals on the base frame 100, providing electrical insulation between the conductive parts and ground. A contact seat 102, a metal conductive component, is fixedly connected to the top of each insulator 101. A terminal block 201, used for connecting external incoming or outgoing conductive circuits, is fixedly connected to the top of each contact seat 102.

[0025] like Figure 4 As shown, the stationary contact assembly is installed in one of them. Figure 1 On the left side of the terminal block 201. The stationary contact assembly includes a stationary contact conductive seat 202, which is fixedly installed above the corresponding terminal block 201 and electrically connected to the terminal block 201. The stationary contact conductive seat 202 is a hollow cylindrical conductor with its axis extending horizontally. The end of the inner cavity opening of the stationary contact conductive seat 202 facing the moving contact assembly has a tapered surface that gradually narrows inward from the port to form a tapered guide section. The cone angle (the angle between the generatrix of the cone surface and the axis) of this tapered guide section is preferably 15° to 45°, more preferably 20° to 30°. The inner cavity section after the tapered guide section is a cylindrical section, and its inner wall radius is adapted to the convex arc surface of the arc-shaped contact finger 208.

[0026] Among them, the stationary contact conductive base 202 is made of a high conductivity copper alloy, and its outer surface can be plated with silver to reduce contact resistance and improve corrosion resistance.

[0027] like Figures 1 to 3 As shown, the moving contact assembly is mounted on another Figure 1 On the right-hand terminal block 201. The moving contact assembly includes a contact blade 200, a contact conductive rod 203, a ball head seat 204, a ball head body 205, a contact frame 206, and an arc-shaped contact finger 208.

[0028] The contact 200 is a long, strip-shaped conductive arm, one end of which is rotatably connected to the corresponding terminal block 201 via a pivot pin 210. The axis of the pivot pin 210 is horizontal and perpendicular to the swing plane of the contact 200, allowing the contact 200 to rotate around the pivot pin 210 in a vertical plane. This enables the closing contact to rotate downwards to insert the moving contact into the stationary contact and the opening contact to rotate upwards to disengage the moving contact from the stationary contact. A contact conductive rod 203 is fixedly connected to the end of the contact 200 away from the pivot pin 210. The contact conductive rod 203 extends along the length of the contact 200. A ball head seat 204 is fixedly connected to the other end of the contact conductive rod 203. A spherical cavity is machined inside the ball head seat 204, with the opening of the cavity facing away from the contact 200.

[0029] Furthermore, the ball head portion of the ball head body 205 is housed within the spherical cavity of the ball head seat 204, forming a spherical kinematic pair. The ball head body 205 can deflect at a certain angle in any direction within the spherical cavity. The rod portion of the ball head body 205 extends outward from the opening of the ball head seat 204. The contact frame 206 is fixedly connected to the end face of the rod portion of the ball head body 205 by bolts or welding. The aforementioned contact conductive rod 203, ball head seat 204, ball head body 205, and contact frame 206 together constitute a universal assembly, allowing the contact frame 206 to deflect in any direction relative to the axis of the contact blade 200.

[0030] like Figure 3 As shown, the contact holder 206 is a cylindrical body with multiple axially extending grooves evenly distributed along its outer circumference. The grooves have rectangular or trapezoidal cross-sections, with their openings facing radially outward. Each groove contains a sliding contact guide block 207. The outer contour of the guide block 207 slides within the groove's inner contour, allowing it to reciprocate along the groove's depth direction but preventing it from shifting axially or circumferentially along the contact holder. An arc-shaped contact finger 208 is fixedly mounted to the radially outer surface of the guide block 207 using screws or riveting. The outer surface of the arc-shaped contact finger 208 is a convex arc surface with a radius of curvature greater than the inner wall radius of the cylindrical section of the stationary contact conductive base 202. The axial length of the arc-shaped contact finger 208 matches the effective contact length of the cylindrical section of the stationary contact conductive base 202. The arc-shaped contact finger 208 is made of a high-conductivity copper alloy and can be silver-plated.

[0031] A contact spring 209 is installed between the radially inner side of each contact guide block 207 and the bottom wall of the corresponding groove. The contact spring 209 is a helical compression spring, which pushes the contact guide block 207 and the arc-shaped contact finger 208 radially outward in the free state, keeping them in the maximum radial extension position. During the closing insertion process, when the arc-shaped contact finger 208 is radially squeezed by the tapered guide section, the contact spring 209 is compressed, allowing the arc-shaped contact finger 208 to radially retract inward; when fully inserted, the contact spring 209 provides a uniform radially outward elastic force, pressing each arc-shaped contact finger 208 against the inner wall of the stationary contact conductive seat 202, establishing the final contact pressure.

[0032] Specifically, the adaptive alignment process is as follows: During the closing process, the contact blade 200 rotates downward around the pivot pin 210, and the moving contact assembly moves towards the stationary contact assembly. When the arc-shaped contact finger 208 approaches the open end of the stationary contact conductive seat 202, the convex arc surface of the arc-shaped contact finger 208 first contacts the conical surface of the conical guide section. Since the radius of curvature of the convex arc surface is greater than the radius of the inner wall of the stationary contact conductive seat, the two are in single-point line contact at the initial contact point, that is, there is a contact line extending axially between each arc-shaped contact finger and the conical surface at the contact point. Force analysis is performed on this contact point. Let the axial driving force for closing be F_a, and the normal reaction force of the conical surface be F_n. Since there is a cone angle α between the conical surface and the axis, the normal reaction force F_n can be decomposed as: Axial component: F_nx = F_n·sin(α), the direction is opposite to the closing direction; Circumferential component: F_ny = F_n·cos(α)·sin(θ), where θ is the circumferential angle position of the cone surface at the contact point; The circumferential component F_ny acts tangentially along the conical surface, driving the contact holder 206 to rotate and fine-tune the ball head 205 within the ball head seat 204 around the spherical surface. If, initially, the arc-shaped contact fingers 208 do not simultaneously and uniformly contact the conical surface, the circumferential force at each contact point is unbalanced. This unbalanced torque drives the contact holder 206 to rotate until the arc-shaped contact fingers 208 uniformly contact the conical surface circumferentially. At this point, the circumferential forces are balanced, and the rotation tends to stop. Thus, the axis of the contact holder 206 automatically aligns with the axis of the stationary contact conductive seat 202.

[0033] As the contact blade continues to rotate, the arc-shaped contact finger 208 slides along the conical surface into the cylindrical section of the stationary contact conductive base 202. During this process, the radial compression of the arc-shaped contact finger 208 by the conical surface compresses the contact finger spring 209, causing the arc-shaped contact finger 208 to retract radially inward. When the moving contact assembly is fully inserted, all the arc-shaped contact fingers 208 are inside the cylindrical section. The contact finger spring 209 provides a uniform radial outward elastic force, pressing each arc-shaped contact finger 208 evenly against the inner wall of the cylindrical section, establishing a stable electrical contact, ensuring low contact resistance and reliable current carrying capacity.

[0034] Please see Figure 7 The transmission assembly is used to convert the linear motion of the push rod 302 into the rotational motion of the pivot pin 210, thereby driving the contact knife 200 to perform closing or opening actions.

[0035] Furthermore, the transmission assembly includes a transmission handle 300 and a longitudinal groove connecting block 303. The transmission handle 300 is a plate-shaped or rod-shaped component, one end of which is fixed to the outer surface of the pivot pin 210, for example, by a spline or key connection, so that the transmission handle 300 and the pivot pin 210 rotate synchronously. The other end of the transmission handle 300 extends outward along the radial direction of the pivot pin 210. The longitudinal groove connecting block 303 is slidably fitted on the outer surface of the transmission handle 300, and a longitudinal guide groove extending along its longitudinal direction, i.e., the moving direction of the push rod 302, is formed on the longitudinal groove connecting block 303. A pin is fixedly provided on the transmission handle 300, which extends into and slides within the longitudinal guide groove. When the longitudinal groove connecting block 303 moves in a straight line under the drive of the push rod 302, the inner wall of the longitudinal guide groove pushes the pin, causing the transmission handle 300 to rotate around the axis of the pivot pin 210, thereby driving the pivot pin 210 to rotate and causing the contact knife 200 to perform closing or opening actions. This pin-groove mechanism converts linear motion into rotary motion, and has a simple structure and reliable transmission.

[0036] One end of the longitudinal groove connecting block 303 is hinged to the push rod 302 to allow adaptive angular changes between the longitudinal groove connecting block 303 and the push rod 302 during the rotation of the transmission handle 300.

[0037] Please see Figure 7 and Figure 8 The two-stage energy storage drive mechanism is used to pre-store mechanical energy before closing the circuit and release the stored energy in stages to drive the transmission components after receiving the closing command.

[0038] The dual-stage energy storage drive mechanism includes a power source, a transmission rod 306, a sliding frame 312, and a release slider assembly.

[0039] Furthermore, the power source includes a servo motor 304 and a reducer 305. The servo motor 304 is fixedly mounted on an independent support structure. The input end of the reducer 305 is connected to the output shaft of the servo motor 304, and the reducer 305 is used to reduce the speed and increase the output torque. The output end of the reducer 305 is connected to one end of the transmission rod 306.

[0040] It is worth mentioning that the outer surface of the transmission rod 306 is divided into a threaded section and a smooth section along its axial direction. The threaded section is located on the side closer to the power source, i.e., closer to the reducer 305, and its outer surface is machined with external threads; the smooth section is located on the side farther from the power source, and its outer surface is a smooth cylindrical surface. The ratio of the axial length of the threaded section to the smooth section is designed according to the needs of the energy storage stroke and the release stroke. The sliding frame 312 is fixedly mounted on an independent support structure, which has a sliding guide surface extending along the axial direction of the transmission rod 306. This guide surface can be in the form of a guide rail or a groove. The release slider assembly includes three sliding components that are slidably installed along the axial direction of the sliding frame 312 from the power source side to the load side: a nut drive block 307, a spring seat 309, and an auxiliary release slider 311. All three are slidably mounted on the sliding guide surface of the sliding frame 312 and can slide independently along the axial direction of the transmission rod 306.

[0041] The nut drive block 307 has an internal thread machined into its central through hole, which forms a threaded transmission pair with the threaded section of the transmission rod 306. When the transmission rod 306 rotates, the rotational freedom of the nut drive block 307 is restricted by the sliding bracket 312, converting the rotational motion of the transmission rod 306 into linear axial movement of the nut drive block 307. The direction of movement of the nut drive block 307 depends on the rotational direction of the transmission rod 306. The central through hole of the spring seat 309 is a smooth hole, with its inner diameter slightly larger than the outer diameter of the smooth section of the transmission rod 306. The spring seat 309 is slidably sleeved on the smooth section of the transmission rod 306, and can slide freely axially on the smooth section without being directly affected by the rotation of the transmission rod. Similarly, the central through hole of the auxiliary release slider 311 is also a smooth hole, with its inner diameter slightly larger than the outer diameter of the smooth section of the transmission rod 306, and the auxiliary release slider 311 is also slidably sleeved on the smooth section of the transmission rod 306.

[0042] Furthermore, the main energy storage spring 308 is a helical compression spring, sleeved on the outer surface of the transmission rod 306. One end of the main energy storage spring 308, near the power source, abuts against the end face of the nut drive block 307 facing the load side, and the other end abuts against the end face of the spring seat 309 facing the power source side. The auxiliary acceleration spring 310 is also a helical compression spring, sleeved on the outer surface of the smooth section of the transmission rod 306. One end of the auxiliary acceleration spring 310 abuts against the end face of the spring seat 309 facing the load side, and the other end abuts against the end face of the auxiliary release slider 311 facing the power source side.

[0043] It should be noted that the spring stiffness of the main energy storage spring 308 is preferably greater than that of the auxiliary acceleration spring 310, so that the energy stored in the main energy storage spring 308 is greater than that stored in the auxiliary acceleration spring 310, thereby meeting the energy requirements of the second-stage long-stroke drive. In a preferred embodiment, the stiffness coefficient of the main energy storage spring 308 is 1.5 to 3 times that of the stiffness coefficient of the auxiliary acceleration spring 310. One end of the push rod 302 is fixedly connected to the auxiliary release slider 311, and the other end of the push rod 302 is hinged to the longitudinal groove connecting block 303.

[0044] The specific energy storage process: In the initial state (open state), the nut drive block 307 is located near the polished section of the threaded section of the transmission rod 306, and the main energy storage spring 308 and the auxiliary acceleration spring 310 are both in a free state or only slightly pre-compressed.

[0045] When energy storage is required, the servo motor 304 starts and drives the transmission rod 306 to rotate via the reducer 305. The threaded section of the transmission rod 306 drives the nut drive block 307 to move axially toward the load end, i.e., away from the power source, through the threaded transmission pair.

[0046] The movement of the nut drive block 307 first compresses the main energy storage spring 308. The elastic force of the main energy storage spring 308 pushes the spring seat 309 to move. The movement of the spring seat 309 compresses the auxiliary acceleration spring 310. The elastic force of the auxiliary acceleration spring 310 pushes the auxiliary release slider 311.

[0047] When the auxiliary release slider 311 moves to the position where its slot 316 is aligned with the locking pin 315, the locking pin 315 is engaged in the slot 316 under the action of the gravity or spring bias of the locking rocker arm 314, thus axially locking the auxiliary release slider 311.

[0048] Subsequently, the nut drive block 307 continues to advance. Since the auxiliary release slider 311 has been locked, the spring seat 309 can continue to move within the sliding range of the locking pin 318 in the limiting groove 317. The main energy storage spring 308 is further compressed, and the auxiliary acceleration spring 310 is also further compressed. Because the auxiliary release slider 311 is locked, the spring seat 309 continues to approach the locked auxiliary release slider 311.

[0049] When the locking pin 318 abuts against the end wall of the limiting groove 317 near the auxiliary release slider 311, the spring seat 309 is also limited, and the nut drive block 307 can no longer be pushed forward or is stopped by the torque limit of the servo motor 304. At this time, the energy storage stage is completed. The main energy storage spring 308 and the auxiliary acceleration spring 310 are both in a fully compressed energy storage state, and the sum of the elastic potential energy of the two springs is the total energy stored in the system.

[0050] Please see Figure 6 and Figure 7 as well as Figure 10 The locking and tiered release mechanism is used to lock the auxiliary release slider 311 and limit the stroke of the spring seat 309 during the energy storage phase, and to release it in stages according to a preset timing sequence during the closing phase.

[0051] The locking and tiered release mechanism includes a side frame 313, a locking rocker arm 314, a locking pin 315, a slot 316, a limiting slot 317, and a locking pin 318. The side frame 313 is a long strip plate fixedly mounted on the side of the sliding frame 312, extending parallel to the axial direction of the sliding frame 312. A hinge shaft is located at the end of the side frame 313 furthest from the power source, and the axis of the hinge shaft is perpendicular to the axial direction of the sliding frame 312.

[0052] Furthermore, the locking rocker arm 314 is a lever, the middle portion of which is hinged to the side frame 313 via the aforementioned hinge axis. The locking rocker arm 314 can swing freely about this hinge axis in a plane perpendicular to the axial direction of the sliding frame 312. The locking rocker arm 314 has a first end ( Figure 9 The middle end near the auxiliary release slider 311) and the second end ( Figure 9 (The end of the slider 311 that is far from the auxiliary release slider).

[0053] A locking pin 315 is fixedly mounted on the surface of the locking rocker arm 314 facing the auxiliary release slider 311. The locking pin 315 is a cylindrical pin or a square protrusion, the cross-sectional shape of which matches the cross-sectional shape of the slot 316. A locking pin 318 is fixedly mounted on the surface of the locking rocker arm 314 facing the spring seat 309. The locking pin 318 is also a cylindrical pin or a square protrusion.

[0054] A slot 316 is provided on the outer surface of the auxiliary release slider 311. The slot 316 is a square or rectangular groove with its opening facing the locking pin 315, and its depth and width are sufficient to accommodate the insertion part of the locking pin 315. When energy storage is complete, the auxiliary release slider 311 moves to an axial position where the slot 316 is aligned with the locking pin 315, and the locking pin 315 engages in the slot 316, axially locking the auxiliary release slider 311.

[0055] A limiting groove 317 extending axially is provided on the outer surface of the spring seat 309. The limiting groove 317 is a straight groove with a preset axial length L. A retaining pin 318 extends into the limiting groove 317, and the outer diameter of the retaining pin 318 slides in conjunction with the groove width of the limiting groove 317, so that the retaining pin 318 can slide freely axially within the limiting groove 317, but the extreme position of the sliding is limited by the two end walls of the limiting groove 317.

[0056] During energy storage, when the locking pin 315 engages with the slot 316, the locking pin 318 is positioned at a certain intermediate position within the limiting groove 317. Subsequently, as the nut drive block 307 continues to advance and compress the main energy storage spring 308, the spring seat 309 can continue to move relative to the locked auxiliary release slider 311. The locking pin 318 slides relative to the locking groove 317 until it abuts against the end wall of the limiting groove 317 near the auxiliary release slider 311. At this point, further movement of the spring seat 309 is prevented, and energy storage reaches its final state. Figure 8 As shown.

[0057] Furthermore, the trigger release mechanism includes a trigger cam 321, a gear set 322, a drive gear 323, a drive motor 324, a drive swing arm 319, a contact wheel 301, and a torsion spring rod 320. The trigger cam 321 is rotatably mounted on one end of the pivot pin 210 or on an independent short shaft coaxially mounted with the pivot pin 210 on the base frame. The trigger cam 321 can rotate freely about its own axis.

[0058] The outer peripheral profile of the trigger cam 321 consists of a semi-circular arc surface (a segment concentric with the rotation center of the trigger cam and with a constant radius R) and at least one cam surface protruding radially outward from the semi-circular arc surface. The central angle corresponding to the semi-circular arc surface is approximately 180°. The radial protrusion height of the cam surface gradually increases from zero at the semi-circular arc surface until it reaches a maximum protrusion height H, and then gradually decreases back to the semi-circular arc surface. The profile curve of the cam surface can be designed according to the timing requirements of the graded release. A set of toothed teeth 322 is fixedly provided on the outer surface of the semi-circular arc surface. The toothed teeth 322 are arranged circumferentially along the trigger cam 321, forming an arc-shaped rack. The arc length of the toothed teeth 322 corresponds to the idle stroke angle range during the rotation of the trigger cam 321 when the drive arm 319 does not move, i.e., when the contact wheel 301 rolls on the semi-circular arc surface, the drive arm 319 does not swing.

[0059] The drive gear 323 is rotatably mounted on one side of the trigger cam 321 and meshes with the tooth assembly 322. The ratio of the number of teeth in the drive gear 323 to the number of teeth in the tooth assembly 322 determines the rotation angle range of the trigger cam 321.

[0060] Furthermore, the drive motor 324 is fixedly mounted on an independent support structure, and its output shaft can be directly connected to the drive gear 323 or connected via a coupling. The drive motor 324 is a servo motor or a stepper motor, which can precisely control the rotation angle of the drive gear 323. The drive swing arm 319 is a long strip rod, one end of which is hinged to a fixed fulcrum via a hinge shaft. This fulcrum can be set on the side frame 313 or the base frame 100. The drive swing arm 319 can swing around the hinge shaft in a vertical or horizontal plane. A contact wheel 301 is fixedly mounted on the free end of the other end of the drive swing arm 319. The contact wheel 301 is a freely rotatable roller, and its outer circumferential surface is located on the movement path of the cam surface of the trigger cam 321, which can make rolling contact with the rotating cam surface.

[0061] Furthermore, a torsion spring rod 320 is elastically connected between the middle of the drive arm 319 and the side of the trigger cam 321. The torsion spring rod 320 is a torsion spring or a helical tension spring, its function being to provide an elastic biasing force to the drive arm 319 towards the trigger cam 321, ensuring that the contact wheel 301 remains in contact with the outer peripheral surface of the trigger cam 321, and resetting the drive arm 319 to its initial angular position after passing the cam surface. The middle of the drive arm 319 or the side near the hinge end forms an abutting engagement with the second end of the locking rocker arm 314 away from the hinge axis. When the drive arm 319 swings under the drive of the trigger cam 321, one side surface of the drive arm 319 abuts against and pushes the second end of the locking rocker arm 314, causing the locking rocker arm 314 to swing around its own hinge axis.

[0062] The tiered release process is as follows: When the drive motor 324 drives the drive gear 323 to rotate, causing the trigger cam 321 to rotate to the first angle, the initial section of the cam surface contacts the contact wheel 301. The radial protrusion of the cam surface pushes the contact wheel 301 and the drive rocker arm 319 to swing outward. The drive rocker arm 319 pushes the second end of the locking rocker arm 314, causing the locking rocker arm 314 to rotate around the hinge axis by an initial angle. At this rotation angle, the locking pin 315 first exits from the slot 316, releasing the axial lock on the auxiliary release slider 311.

[0063] After the auxiliary release slider 311 unlocks, the auxiliary acceleration spring 310 first releases its stored elastic potential energy, pushing the auxiliary release slider 311 to move rapidly along the sliding frame 312. This drives the longitudinal groove connecting block 303 to move via the push rod 302, and then drives the rotating pin 210 to rotate via the transmission handle 300. The high acceleration release characteristic of the auxiliary acceleration spring 310 provides the rotating pin 210 with an initial impact torque to overcome static friction and system inertia, enabling the contact knife 200 to quickly initiate the closing rotation action. This is the first stage of release.

[0064] During this first-stage release process, because the locking pin 318 remains within the limiting groove 317, the spring seat 309 remains limited, and the main energy storage spring 308 remains compressed and stored without releasing. When the trigger cam 321 continues to rotate to the second angle, the further radial protrusion of the cam surface causes the drive rocker arm 319 to continue swinging outward, pushing the locking rocker arm 314 to rotate to a larger angle. At this time, the locking pin 318 disengages from the end wall of the limiting groove 317, releasing the limitation on the spring seat 309.

[0065] After the spring seat 309 is unlocked, the main energy storage spring 308 releases its stored elastic potential energy, pushing the spring seat 309, auxiliary acceleration spring 310, and auxiliary release slider 311 to continue moving as a whole. This provides a continuous and stable driving torque to the rotary pin 210 via the push rod 302, enabling the contact knife 200 to complete the remaining closing stroke and fully insert the arc-shaped contact finger 208 into the stationary contact conductive seat 202. The contact finger spring 209 then establishes final contact pressure. This is the second stage of release.

[0066] In summary, the overall effect of the two-stage release is as follows: the first stage overcomes static friction with a high-acceleration impact starting force, achieving "quick engagement"; the second stage completes the stroke and establishes final pressure with a continuous and stable driving force. The timing and driving force characteristics of the two-stage release are optimized through the design of the cam surface profile of the trigger cam 321 and the stiffness matching of the two springs.

[0067] Example 2: Please refer to Figure 1 - Figure 12 The present invention also provides a technical solution, which differs from the technical solution of Embodiment 1 as follows: a fast-closing intelligent high-voltage disconnecting switch, further comprising an end buffer damping device, which is used to apply progressive hydraulic damping to the linear motion of the push rod 302 in the extremely short stroke range before the moving contact assembly contacts the stationary contact assembly, to absorb the end kinetic energy and achieve flexible contact between the moving contact and the stationary contact.

[0068] The end-buffer damping device includes a flexible oil storage sleeve 400, a gradually tapered section 402, a damping chamber 403, a movable rod 404, a pressure plate 405, a throttling orifice 406, and a spring 407.

[0069] Furthermore, the flexible oil reservoir sleeve 400 is an annular sleeve structure, fixedly fitted at the spatial position corresponding to the end of the stroke of the push rod 302. The flexible oil reservoir sleeve 400 is fixedly installed by the support frame 401. The inner wall of the flexible oil reservoir sleeve 400 is made of a flexible and deformable material, such as oil-resistant rubber, polyurethane elastomer, or fluororubber, which has good elastic deformation capability and oil resistance. The inner cavity of the flexible oil reservoir sleeve 400 is a closed cavity filled with a damping medium. The damping medium is preferably a viscous hydraulic oil, such as dimethicone oil or mineral-based hydraulic oil, and its viscosity can be selected according to the required damping characteristics.

[0070] The gradually tapered section 402 is constructed on the outer surface of the push rod 302. Along the closing movement direction of the push rod 302, the radial outer diameter of the gradually tapered section 402 gradually increases. In a preferred embodiment, the taper of the gradually tapered section 402 gradually increases at the end of the stroke, meaning the rate of change of the outer diameter increases with the advancement of the stroke, resulting in a non-linear increase in damping force with the stroke, achieving maximum damping effect instantaneously before contact. Multiple damping chambers 403 are circumferentially spaced on the outer peripheral wall of the flexible oil reservoir sleeve 400. In a preferred embodiment, the number of damping chambers 403 is four to eight, evenly distributed along the circumference. Each damping chamber 403 is an independent closed cavity, its internal volume connected to the inner cavity of the flexible oil reservoir sleeve 400 through a throttling orifice 406. The cross-sectional area and flow area of ​​the throttling orifice 406 are much smaller than the cross-sectional area of ​​the inner cavity of the flexible oil reservoir sleeve 400. Multiple movable rods 404 are circumferentially spaced and radially slidable through the wall of the flexible oil storage sleeve 400. The axis of the movable rods 404 is aligned with the radial direction of the flexible oil storage sleeve 400. The inner end of each movable rod 404 passes through the flexible inner wall and extends into the inner cavity of the flexible oil storage sleeve 400, and is fixedly connected to a pressure plate 405. The pressure plate 405 is an arc-shaped plate or a flat plate, and its outer surface is attached to the inner surface of the flexible inner wall. Under normal conditions, it provides support to the flexible inner wall and maintains the initial geometry of the inner cavity.

[0071] Furthermore, a spring 407 is fitted onto the outer surface of each movable rod 404. The spring 407 is a helical compression spring. One end of the spring 407 abuts against the stepped surface or retaining ring at the outer end of the movable rod 404, and the other end abuts against the outer wall of the damping chamber 403 or a spring seat fixed to the outer wall. In its free state, the spring 407 biases the movable rod 404 radially inward, causing the pressure plate 405 to press tightly against the flexible inner wall.

[0072] End-buffer operation process: During the first 85% to 95% of the closing stroke, the gradually tapered section 402 has not yet entered the inner cavity of the flexible oil reservoir sleeve 400, and the push rod 302 moves at a normal speed without being affected by buffering damping.

[0073] When the push rod 302 moves to the last 5% to 15% of its closing stroke, the front cone of the tapered section 402 begins to contact the inner wall of the flexible oil reservoir sleeve 400. As the push rod 302 continues to advance, the outer diameter of the tapered section 402 continuously increases, generating a gradually increasing radial compression effect on the flexible inner wall.

[0074] This radial compression produces two parallel damping effects: First, the contact area and contact pressure between the conical surface and the flexible inner wall gradually increase, generating a gradually increasing mechanical friction damping force. This friction force directly reacts to the push rod 302, braking its movement.

[0075] Second, radial compression causes the flexible inner wall to concave inward, reducing the internal cavity volume and forcing the damping medium in the cavity to flow into the damping chambers 403 through the throttling orifices 406. Since the cross-sectional area of ​​the throttling orifices 406 is much smaller than that of the internal cavity, the damping medium experiences significant flow resistance when flowing through them. According to the throttling principle in fluid mechanics, the greater the pressure difference, the greater the flow rate; conversely, the faster the push rod 302 moves and the higher the compression rate of the flexible inner wall, the damping medium is forced to flow through the throttling orifices 406 at a faster speed, requiring a sharp increase in pressure difference, thus generating a hydraulic damping force on the push rod 302 that is positively correlated with its movement speed. This speed adaptability allows the buffer device to effectively exert its damping effect at different closing speeds.

[0076] During radial compression, the deformation of the flexible inner wall pushes each pressure plate 405 and movable rod 404 to move radially outward, compressing each spring 407. The compression reaction force of the spring 407 and the hydraulic damping force are superimposed to form the total damping force on the push rod 302.

[0077] By rationally designing the taper curve of the gradient conical section 402, the diameter and number of throttling orifices 406, the viscosity of the damping medium, and the stiffness of the spring 407, the required damping force can be obtained in the end range of the push rod 302's stroke, so that the moving contact assembly is smoothly decelerated to a safe low residual speed before contacting the stationary contact assembly, achieving flexible contact and avoiding mechanical damage to the contact surface caused by high-speed collisions.

[0078] When closing is complete, as push rod 302 moves in the reverse direction during opening, the tapered section 402 exits the inner cavity of the flexible oil storage sleeve 400. With the release of radial compression, each spring 407 drives the corresponding movable rod 404 and pressure plate 405 to return radially inward, restoring the flexible inner wall to its original geometry and the inner cavity volume. Under the influence of gravity and negative pressure, the damping medium flows back from each damping chamber 403 through each throttling orifice 406 to the inner cavity. The buffer device returns to its initial state, preparing for the next closing operation.

[0079] 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, article, 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, article, or apparatus.

[0080] 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 quick-closing intelligent high-voltage disconnecting switch, comprising a base frame (100), wherein at least two insulators (101) are fixedly disposed on the base frame (100), and a contact seat (102) is fixedly connected to the top of each insulator (101), and a terminal block (201) is connected to the top of each contact seat (102), characterized in that, Also includes: A stationary contact assembly, mounted on one of the terminal blocks (201), includes a stationary contact conductive seat (202), the top of which is provided with a tapered guide section; The moving contact assembly, mounted on another terminal block (201), includes a contact blade (200), one end of which is rotatably connected to the corresponding terminal block (201) via a pivot pin (210), and the other end of which is connected to an arc-shaped contact finger (208) adapted to the stationary contact conductive base (202) via a universal joint. The transmission assembly includes a transmission handle (300) fixedly connected to the outer surface of the pivot pin (210), and a longitudinal groove connecting block (303) slidably connected to the outer surface of the transmission handle (300). The linear movement of the longitudinal groove connecting block (303) drives the pivot pin (210) to rotate through the pin groove engagement. A two-stage energy storage drive mechanism includes a power source, a transmission rod (306) driven by the power source, and a first energy storage component and a second energy storage component connected in series on the transmission path, with the second energy storage component being close to the load end; The push rod (302) has one end connected to the energy storage component side near the load end and the other end connected to the longitudinal groove connecting block (303); The locking and tiered release mechanism includes a locking rocker arm (314), on which a first locking part and a second locking part are provided, which are releasably locked to the components on the first energy storage device side and the components on the second energy storage device side, respectively, and are configured to release the locking of the components on the first energy storage device side and the components on the second energy storage device side in a preset timing sequence.

2. The quick-closing intelligent high-voltage disconnector according to claim 1, characterized in that: The stationary contact conductive base (202) is a hollow cylindrical conductive body, which is fixedly installed above the corresponding terminal block (201). Its inner cavity opening end is provided with a tapered surface that gradually narrows from the port to form the tapered guide section.

3. The quick-closing intelligent high-voltage disconnector according to claim 2, characterized in that, The universal component includes: The contact conductive rod (203) has one end fixedly connected to the end of the contact blade (200) away from the pivot pin (210); A ball head seat (204) is fixedly connected to the other end of the contact conductive rod (203), and the ball head seat (204) is provided with a spherical cavity; The ball head (205) has its ball head portion housed in the spherical cavity and forms a spherical kinematic pair therewith, and its rod portion extends outward from the ball head seat (204); The contact frame (206) is fixedly connected to the end face of the rod of the ball head (205), and the arc-shaped contact finger (208) is installed on the outer circumferential surface of the contact frame (206).

4. A quick-closing intelligent high-voltage disconnector according to claim 3, characterized in that: The contact frame (206) is a cylindrical body with multiple axially extending grooves evenly distributed on its outer circumferential surface. Each of the grooves is slidably connected to a touch guide block (207), which can slide radially along the depth direction of the groove; The arc-shaped contact finger (208) is fixedly installed on the radial outer side of the contact guide block (207); A finger spring (209) is provided between the radial inner side of each of the finger guide blocks (207) and the bottom wall of the corresponding groove.

5. A quick-closing intelligent high-voltage disconnector according to claim 4, characterized in that: The outer surface of the arc-shaped contact finger (208) is a convex arc surface, and the radius of curvature of the convex arc surface is greater than the inner wall radius of the cylindrical section of the inner cavity of the stationary contact conductive base (202). During the closing and insertion process, the convex arc surface of the arc-shaped contact finger (208) first makes single-point contact with the conical surface of the conical guide section. The conical surface generates a normal reaction force on the convex arc surface. This normal reaction force can be decomposed into an axial component and a circumferential component. The circumferential component drives the contact frame (206) to rotate and fine-tune until each of the arc-shaped contact fingers (208) is uniformly attached to the inner wall of the stationary contact conductive seat (202) along the circumference, thereby achieving adaptive centering.

6. A fast-closing intelligent high-voltage disconnector according to claim 1, characterized in that, The two-stage energy storage drive mechanism also includes: A sliding frame (312) is fixedly mounted on the base frame (100) or an independent support structure, and the sliding frame (312) has a sliding guide surface extending along its axial direction; The release slider assembly includes a nut drive block (307), a spring seat (309), and an auxiliary release slider (311) that are sequentially slidably mounted along the axial direction of the sliding frame (312) from the power source side to the load side. All three can slide independently along the axial direction of the sliding frame (312). The first energy storage component is a main energy storage spring (308), with its two ends abutting against the nut drive block (307) and the spring seat (309), respectively. The second energy storage component is an auxiliary acceleration spring (310), whose two ends abut against the spring seat (309) and the auxiliary release slider (311), respectively. One end of the push rod (302) is fixedly connected to the auxiliary release slider (311), and the other end of the push rod (302) is hinged to the longitudinal groove connecting block (303).

7. A fast-closing intelligent high-voltage disconnector according to claim 6, characterized in that: The power source includes a servo motor (304) and a reducer (305) that is connected to the output shaft of the servo motor (304). The transmission rod (306) is connected to the output end of the reducer (305). The outer surface of the transmission rod (306) is divided into a threaded section and a smooth section along its axial direction. The threaded section is located on the side closer to the power source, and the smooth section is located on the side farther away from the power source. The inner wall of the central through hole of the nut drive block (307) is provided with an internal thread, which forms a threaded transmission pair with the threaded section of the transmission rod (306), so that when the transmission rod (306) rotates, it drives the nut drive block (307) to move axially. The central through holes of the spring seat (309) and the auxiliary release slider (311) are both smooth holes, and both are slidably sleeved on the smooth rod section of the transmission rod (306), so that the spring seat (309) and the auxiliary release slider (311) can slide freely along the axial direction on the smooth rod section without being directly driven by the rotation of the transmission rod (306).

8. A quick-closing intelligent high-voltage disconnector according to claim 7, characterized in that, The locking and tiered release mechanism further includes: Side frame (313) is fixedly disposed on the side of the sliding frame (312) and extends parallel to the axial direction of the sliding frame (312); The locking rocker arm (314) is hinged to the end of the side frame (313) away from the power source via a hinge shaft. The locking rocker arm (314) can swing around the hinge shaft in a plane perpendicular to the axis of the sliding frame (312). The first locking part includes a locking pin (315), which is fixedly disposed on the surface of the locking rocker arm (314) facing the auxiliary release slider (311); The second locking part includes a locking pin (318), which is fixedly disposed on the surface of the locking rocker arm (314) facing the spring seat (309); The component on the first energy storage device side is the auxiliary release slider (311), which has a slot (316) on it. The slot (316) and the locking pin (315) form a releasable plug-in lock when the energy storage is completed. The component on the second energy storage device side is the spring seat (309), which has a limiting groove (317) extending axially. The limiting groove (317) is a straight groove with a preset axial length. The locking pin (318) extends into the limiting groove (317) and can slide axially within the limiting groove (317).

9. A quick-closing intelligent high-voltage disconnector according to claim 8, characterized in that, It also includes a trigger release mechanism for driving the locking rocker arm (314) to swing in a preset sequence to release the stored energy in stages, the trigger release mechanism comprising: A trigger cam (321) is rotatably mounted on one end of the pivot pin (210). The outer peripheral surface of the trigger cam (321) is composed of a semi-circular arc surface and at least one cam surface that protrudes radially from the semi-circular arc surface. A toothed assembly (322) is fixedly provided on the semi-circular arc surface. The drive gear (323) is rotatably disposed on one side of the trigger cam (321) and maintains engagement with the tooth assembly (322); A drive motor (324) has its output shaft connected to the drive gear (323) for driving the drive gear (323) to rotate so as to drive the trigger cam (321) to rotate. The drive arm (319) has a touch wheel (301) at one end. The touch wheel (301) is located on the movement path of the cam surface of the trigger cam (321) and abuts against the rotating cam surface. A torsion spring rod (320) is elastically connected to the middle of the drive arm (319) to provide an elastic torque that resets the drive arm (319). One side of the drive rocker arm (319) and the end of the locking rocker arm (314) away from the hinge axis form an abutting engagement relationship.

10. A fast-closing intelligent high-voltage disconnector according to claim 1, characterized in that, It also includes an end-damping device for applying progressive damping to the movement of the push rod (302) before the moving contact assembly contacts the stationary contact assembly, the end-damping device comprising: A flexible oil storage sleeve (400) is fixedly sleeved at the position corresponding to the end of the stroke of the push rod (302). The inner wall of the flexible oil storage sleeve (400) is made of a flexible and deformable material, and its interior is sealed and filled with a damping medium. A tapered section (402) is constructed on the outer surface of the push rod (302), and its radial dimension gradually increases along the closing movement direction of the push rod (302); Multiple damping chambers (403) are circumferentially spaced on the outer peripheral wall of the flexible oil storage sleeve (400). Each damping chamber (403) is connected to the inner cavity of the flexible oil storage sleeve (400) through a throttling hole (406). The cross-sectional area of ​​the throttling hole (406) is smaller than the cross-sectional area of ​​the inner cavity. Multiple movable rods (404) are distributed circumferentially and slide radially through the wall of the flexible oil storage sleeve (400). The inner end of each movable rod (404) extends into the inner cavity of the flexible oil storage sleeve (400) and is fixedly connected to a pressure plate (405). The pressure plate (405) is attached to the inner wall of the flexible oil storage sleeve (400) to provide support. Multiple springs (407) are fitted one-to-one on the outer surface of each of the movable rods (404). One end of each spring (407) abuts against the outer end step surface of the movable rod (404), and the other end abuts against the outer wall surface of the damping chamber (403).

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