Energy storage operating mechanism of load switch

Abstract

The utility model relates to an energy storage operating mechanism of a load switch, which comprises a shell, a solid-sealed polar pole and an energy storage operating mechanism, and is characterized in that an operating shaft is driven by an operating handle, and a first linkage swing arm and a second linkage swing arm are linked to respectively control a first movable shaft and a second movable shaft to slide in movable grooves at two sides of a mounting frame; a first tension spring is connected between the two movable shafts, and when the operating handle drives the first movable shaft to move to the limit position of the movable groove, the second movable shaft synchronously moves to the corresponding limit position under the action of the tension spring to trigger the opening and closing actions and synchronously control the contact or separation of the movable terminal and the static terminal in the vacuum arc-extinguishing chamber. Through cooperation of a mechanical dead point and a tension spring structure, instant release is triggered when energy storage of the tension spring reaches a critical point, the rotating shaft is driven to realize millisecond-level state switching, opening and closing are rapidly realized, the operation is easy and labor-saving, the operation reliability is remarkably improved, the mechanical life is remarkably prolonged, and the device is suitable for intelligent power grid pole-mounted equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an energy storage operating mechanism of a load switch. Background Art

[0002] In power systems, load switches are critical equipment in distribution networks, ensuring the normal opening and closing of lines and short-circuit protection. Traditional medium-voltage load switches often use SF6 gas as an insulating and arc-extinguishing medium (such as SF6 load switches). Their operating mechanisms often rely on spring energy storage or pneumatic actuation to achieve opening and closing. However, SF6 gas has significant drawbacks: first, its extremely high global warming potential (GWP), and leaks can cause serious environmental damage; second, SF6 switches require strict sealing to maintain gas pressure, which poses a risk of leakage and high maintenance costs. With increasingly stringent environmental regulations, vacuum arc extinguishing technology, due to its pollution-free, long life, and maintenance-free advantages, is gradually becoming a mainstream alternative to SF6 switches.

[0003] Although vacuum load switches offer significant environmental advantages, their operating mechanisms still face challenges in terms of reliability, tripping speed, and synchronization. Traditional vacuum switch operating mechanisms often employ a single spring energy storage or cam-link structure, which presents the following issues:

[0004] 1. Insufficient opening speed: The vacuum interrupter has strict requirements on the opening speed. If the speed is too low, it will easily lead to the arc reignition.

[0005] 2. Poor multi-pole synchronization: When the three poles are linked, the action may be asynchronous due to mechanical deviation, which affects the arc extinguishing effect;

[0006] 3. Complex structure: The spring pre-compression mechanism takes up a large space and requires an additional locking device, resulting in a high failure rate.

[0007] In order to overcome the above defects, there is an urgent need for a vacuum load switch operating mechanism with a compact structure, fast opening speed and high synchronization accuracy. Utility Model Content

[0008] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide an energy storage operating mechanism for a load switch.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an energy storage operating mechanism of a load switch, comprising a housing, a plurality of sealed poles and an energy storage operating mechanism, wherein a vacuum interrupter is provided in the sealed pole, an insulating pull rod, a moving terminal and a static terminal are provided in the vacuum interrupter, the energy storage operating mechanism is linked to each insulating pull rod through a rotating shaft to synchronously control the contact or separation of all moving terminals and static terminals, the energy storage operating mechanism comprises: an operating handle connected to an operating shaft, the operating shaft being pivotally connected to the housing; a first linkage swing arm, one end of which is fixed to the operating shaft, the other end of which is fixed to the operating shaft One end is connected to the first movable shaft; the second linkage swing arm, one end of which is pivotally connected to the operating shaft, and the other end is connected to the second movable shaft, and the second linkage swing arm is driven and connected to the rotating shaft; the mounting frame is fixed in the shell, and movable grooves are symmetrically opened on both sides to constrain the movement path of the first movable shaft or the second movable shaft; a first tension spring is connected between the first movable shaft and the second movable shaft; when the operating handle drives the first movable shaft to move to the first limit position or the second limit position of the movable groove, the second movable shaft moves synchronously to the corresponding limit position under the action of the first tension spring, triggering the opening / closing action.

[0010] As a preferred technical solution of the present invention, the movable groove is an arc-shaped guide groove.

[0011] As a preferred technical solution of the present invention, at least one of the two ends of the movable groove is provided with an elastic clamping mechanism; the elastic clamping mechanism includes: a tightening bayonet, configured to lock the first movable shaft or the second movable shaft that slides to the end of the movable groove; the width of the tightening bayonet can be dynamically adjusted to adapt to the clamping or release of the first movable shaft or the second movable shaft.

[0012] As a preferred technical solution of the present invention, the elastic clamping mechanism also includes: an active arm, one end of which is pivotally connected to the mounting frame; a clamping arm, one end of which is pivotally connected to the mounting frame; a traction arm, both ends of which are pivotally connected to the free end of the active arm and the free end of the clamping arm respectively; a second tension spring, one end of which is connected to the mounting frame and the other end is connected to the active arm, driving the active arm to swing toward the center of curvature of the movable slot.

[0013] As an optimal technical solution of the present invention, a buffer is provided in the shell and is located above the rotating shaft; the rotating shaft is fixedly connected to a buffer block, and the movement trajectory of the buffer block intersects with the buffer end of the buffer; when the opening action is completed, the buffer block abuts against the buffer end to absorb the inertial impact of the rotating shaft.

[0014] As a preferred technical solution of the present invention, a traction plate is hingedly connected to the upper end of each insulating pull rod, and the other end of the traction plate is sleeved on the rotating shaft and fixed circumferentially relative to the rotating shaft.

[0015] As a preferred technical solution of the present invention, the second linkage swing arm is linked to the rotating shaft via a bridging arm, and the bridging arm is hinged to a linkage plate fixed on the rotating shaft to drive the rotating shaft to rotate.

[0016] To sum up, the beneficial effects of the utility model are as follows: Mechanical control: Turn the operating handle to realize manual opening and closing, the first linkage swing arm rotates to make the first movable shaft run to the first limit position or the second limit position, and triggers instantaneous release after the energy storage of the first tension spring reaches the critical point, driving the second linkage swing arm to rotate relative to the operating shaft to make the second movable shaft move synchronously to the first mechanical position or the second limit position, driving the rotating shaft to realize millisecond-level state switching, quickly realize opening and closing, easy and labor-saving operation, realize high-precision synchronization of opening and closing actions, significantly improve operational reliability and mechanical life, and are suitable for smart grid pole-mounted equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the load switch of the utility model;

[0018] Figure 2 It is a structural diagram of the energy storage operating mechanism of the utility model;

[0019] Figure 3 It is a structural diagram of the energy storage operating mechanism of the utility model;

[0020] Figure 4 It is a partial structural diagram of the energy storage operating mechanism of the utility model;

[0021] Figure 5 This is a structural diagram of the elastic clamping mechanism in the utility model;

[0022] Figure 6 This is a schematic diagram of the internal structure of the load switch of the utility model;

[0023] Figure 7 It is a structural diagram of the cooperation between the rotating shaft and the insulating pull rod in the utility model.

[0024] Figure markings: 1. Shell; 2. Sealed pole; 3. Insulating pull rod; 4. Rotating shaft; 5. Operating handle; 6. First linkage swing arm; 7. First movable shaft; 8. Second linkage swing arm; 9. Second movable shaft; 10. Mounting frame; 11. Movable groove; 12. First tension spring; 13. First limit position; 14. Second limit position; 15. Elastic clamping mechanism; 16. Tightening bayonet; 17. Active arm; 18. Clamping arm; 19. Traction arm; 20. Second tension spring; 21. Buffer; 22. Buffer block; 23. Traction plate; 24. Operating shaft; 25. Bridging arm; 26. Linkage plate. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments and drawings. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0026] The specific embodiments of the present utility model are described below with reference to the accompanying drawings.

[0027] like Figure 1-7 The energy storage operating mechanism of a load switch shown in the figure includes a shell 1 (with a vacuum chamber therein), a plurality of sealed poles 2 and an energy storage operating mechanism, wherein a vacuum arc chamber is provided in the sealed pole 2, and an insulating pull rod 3, a moving terminal and a static terminal are provided in the vacuum arc chamber. The energy storage operating mechanism links the insulating pull rods 3 through a rotating shaft 4 to synchronously control the contact or separation of all moving terminals and static terminals. The energy storage operating mechanism includes: an operating handle 5 connected to an operating shaft 24, and the operating shaft 24 is pivotally connected to the shell 1; a first linkage swing arm 6, one end of which is fixed to the operating shaft 24 and the other end is connected to the first movable shaft 7; a second linkage swing arm 8, one end of which is pivotally connected to the operating shaft 24 and the other end is connected to the second movable shaft 9, and the second linkage swing arm 8 is pivotally connected to the rotating shaft. 4 drive connection (specifically: the second linkage swing arm 8 is linked to the rotating shaft 4 via a bridging arm 25, one end of the bridging arm 25 is hinged to the middle part of the second linkage swing arm 8, and the other end is hinged to a linkage plate 26 fixed to the rotating shaft 4, thereby driving the rotating shaft 4 to rotate); a mounting frame 10 is fixed in the housing 1, and has movable grooves 11 symmetrically formed on both sides thereof to constrain the movement path of the first movable shaft 7 or the second movable shaft 9; a first tension spring 12 is connected between the first movable shaft 7 and the second movable shaft 9; when the operating handle 5 drives the first movable shaft 7 to move to the first limit position 13 or the second limit position 14 of the movable groove 11, the second movable shaft 9 is synchronously moved to the corresponding limit position under the action of the first tension spring 12, triggering the opening / closing action. In this embodiment, the movable groove 11 is an arc-shaped guide groove.

[0028] Mechanical control: Manual opening and closing are achieved by rotating the operating handle 5. The first linkage swing arm 6 rotates to cause the first movable shaft 7 to move to the first limit position 13 or the second limit position 14. When the tension spring energy reaches a critical point, it triggers an instantaneous release, driving the second linkage swing arm 8 to rotate relative to the operating shaft 24, causing the second movable shaft 9 to synchronously move to the first mechanical position or the second limit position 14 (for example, if the second movable shaft 9 of the second linkage swing arm 8 is in the second limit position 14, then the second movable shaft 9 is at the bottom dead center. To perform an opening operation, it is only necessary to move the first movable shaft 7, which is also in the second limit position 14, to the first limit position 13, i.e., the top dead center. Since the two movable shafts are at an oblique angle, the tension spring energy reaches a critical point, triggering an instantaneous release, pulling the second movable shaft 9 to the first limit position 13, thereby achieving an opening action, and vice versa). The driving shaft 4 achieves millisecond-level state switching, quickly achieving opening and closing, easy and labor-saving operation, and achieving high-precision synchronization of opening and closing actions, significantly improving operational reliability and mechanical life. It is suitable for smart grid pole-mounted equipment.

[0029] An elastic clamping mechanism 15 is provided at both ends of at least one movable slot 11; the elastic clamping mechanism 15 includes: a tightening bayonet 16, configured to lock the first movable shaft 7 or the second movable shaft 9 that slides to the end of the movable slot 11; the width of the tightening bayonet 16 can be dynamically adjusted to adapt to the clamping or release of the first movable shaft 7 or the second movable shaft 9. In this embodiment, an elastic clamping mechanism 15 is provided at both ends of the movable slot 11 corresponding to the side of the first linkage swing arm 6. The elastic clamping mechanism 15 dynamically clamps the movable shaft at the end of the movable slot 11, and achieves zero rebound locking after the switch is opened and closed.

[0030] The elastic clamping mechanism 15 also includes: an active arm 17, one end of which is pivotally connected to the mounting frame 10; a clamping arm 18, one end of which is pivotally connected to the mounting frame 10; a traction arm 19, both ends of which are pivotally connected to the free end of the active arm 17 and the free end of the clamping arm 18 respectively; a second tension spring 20, one end of which is connected to the mounting frame 10 and the other end is connected to the upper or middle part of the active arm 17, driving the active arm 17 to swing toward the center of curvature of the movable slot 11.

[0031] A buffer 21 is provided in the shell 1 and is located above the rotating shaft 4; the rotating shaft 4 is fixedly connected to a buffer block 22, and the movement trajectory of the buffer block 22 intersects with the buffer end of the buffer 21; when the opening action is completed, the buffer block 22 abuts against the buffer end to absorb the inertial impact of the rotating shaft 4. In this embodiment, the buffer 21 preferably adopts a hydraulic damper or a gas-liquid mixed buffer 21, etc.

[0032] A traction plate 23 is hingedly connected to the upper end of each insulating pull rod 3 , and the other end of the traction plate 23 is sleeved on the rotating shaft 4 and fixed circumferentially relative to the rotating shaft 4 .

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention as claimed, and the scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy storage operating mechanism for a load switch, comprising a housing (1), a plurality of sealed poles (2), and an energy storage operating mechanism, wherein a vacuum interrupter is provided in the sealed pole (2), an insulating pull rod (3), a movable terminal, and a static terminal are provided in the vacuum interrupter, and the energy storage operating mechanism links the insulating pull rods (3) via a rotating shaft (4) to synchronously control the contact or separation of all movable terminals and static terminals, characterized in that: The energy storage operating mechanism comprises: an operating handle (5) connected to an operating shaft (24), wherein the operating shaft (24) is pivotally connected to the housing (1); a first linkage swing arm (6), one end of which is fixedly connected to the operating shaft (24) and the other end of which is connected to the first movable shaft (7); a second linkage swing arm (8), one end of which is pivotally connected to the operating shaft (24) and the other end of which is connected to the second movable shaft (9), and the second linkage swing arm (8) is drivingly connected to the rotating shaft (4); and a mounting frame (10) fixed to the housing (1). Inside, movable grooves (11) for constraining the movement path of the first movable shaft (7) or the second movable shaft (9) are symmetrically opened on both sides; a first tension spring (12) is connected between the first movable shaft (7) and the second movable shaft (9); when the operating handle (5) drives the first movable shaft (7) to move to the first limit position (13) or the second limit position (14) of the movable groove (11), the second movable shaft (9) moves synchronously to the corresponding limit position under the action of the first tension spring (12), triggering the opening / closing action.

2. The energy storage operating mechanism of the load switch according to claim 1, characterized in that: The movable groove (11) is an arc-shaped guide groove.

3. The energy storage operating mechanism of the load switch according to claim 1, characterized in that: At least one of the movable slots (11) is provided with an elastic clamping mechanism (15) at both ends; the elastic clamping mechanism (15) comprises a tightening bayonet (16) configured to lock the first movable shaft (7) or the second movable shaft (9) that slides to the end of the movable slot (11); the width of the tightening bayonet (16) can be dynamically adjusted to adapt to the clamping or release of the first movable shaft (7) or the second movable shaft (9).

4. The energy storage operating mechanism of the load switch according to claim 3, characterized in that: The elastic clamping mechanism (15) further comprises: an active arm (17), one end of which is pivotally connected to the mounting frame (10); a clamping arm (18), one end of which is pivotally connected to the mounting frame (10); a traction arm (19), both ends of which are respectively pivotally connected to the free end of the active arm (17) and the free end of the clamping arm (18); and a second tension spring (20), one end of which is connected to the mounting frame (10) and the other end of which is connected to the active arm (17), driving the active arm (17) to swing toward the curvature center side of the movable groove (11).

5. The energy storage operating mechanism of the load switch according to claim 1, characterized in that: A buffer (21) is provided in the housing (1) and is located above the rotating shaft (4); the rotating shaft (4) is fixedly connected to a buffer block (22), and the movement trajectory of the buffer block (22) intersects with the buffer end of the buffer (21); when the opening action is completed, the buffer block (22) abuts against the buffer end to absorb the inertial impact of the rotating shaft (4).

6. The energy storage operating mechanism of the load switch according to claim 1, characterized in that: A traction plate (23) is hingedly connected to the upper end of each insulating pull rod (3); the other end of the traction plate (23) is sleeved on the rotating shaft (4) and circumferentially fixed relative to the rotating shaft (4).

7. The energy storage operating mechanism of the load switch according to claim 1, characterized in that: The second linkage swing arm (8) is linked to the rotating shaft (4) via a bridging arm (25), and the bridging arm (25) is hinged to a linkage plate (26) fixed on the rotating shaft (4) to drive the rotating shaft (4) to rotate.

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