Switchgear flap system

Abstract

The application belongs to the technical field of high-voltage switchgear, and particularly relates to a switch cabinet valve system, which comprises an upper valve leaf and a lower valve leaf, and further comprises a motion conversion device, wherein the motion conversion device further comprises: an input end configured to receive a linear driving force of a circuit breaker; an output end configured to drive the upper valve leaf and the lower valve leaf to move linearly in opposite directions; and a transmission mechanism connected between the input end and the output end, and configured to make the motion speed of the output end greater than the motion speed of the input end when the upper valve leaf and the lower valve leaf are opened. The application ensures that the upper valve leaf and the lower valve leaf can be opened to a safe position at a speed faster than the circuit breaker, so as to solve the inherent contradiction between insufficient safety clearance and motion interference caused by space limitation, and realize the reduction of interference phenomenon in the operation process of the circuit breaker under the premise of meeting the strict safety clearance.

Description

Technical Field

[0001] This application belongs to the field of high voltage switchgear technology, specifically relating to a switchgear door system. Background Technology

[0002] Switchgear is a crucial power distribution device in a power system. It typically contains a valve system to isolate energized areas such as the busbar compartment when the circuit breaker is removed, ensuring operational safety. This valve system generally includes openable and closable valve flaps and their drive mechanisms.

[0003] In existing technologies, due to the trend towards more compact overall structures, the internal layout of switchgear is becoming increasingly compact, which presents challenges to the design of valve systems. Specifically, a minimum electrical distance (clearance) that meets safety standards needs to be maintained between the valve leaf and live components such as stationary contacts inside the cabinet. However, within limited installation space, simply increasing this clearance often leads to movement interference between the valve leaf and components along the circuit breaker's trajectory (such as the circuit breaker contacts) during the insertion or removal of the circuit breaker. This can cause problems such as scraping or jamming, preventing the valve from opening or closing properly and affecting the reliability and safety of the switchgear. Utility Model Content

[0004] The purpose of this application is to resolve the contradiction between the door movement space and air clearance caused by the miniaturization and compact design of switch cabinets in related technologies.

[0005] This application provides a switchgear door system, including an upper door leaf and a lower door leaf. The switchgear door system also includes a motion conversion device, which further includes: an input end for receiving the linear driving force of a circuit breaker; an output end for driving the upper door leaf and the lower door leaf to move in opposite directions in a linear motion; and a transmission mechanism connected between the input end and the output end. The transmission mechanism is configured such that when the upper door leaf and the lower door leaf are open, the movement speed of the output end is greater than the movement speed of the input end.

[0006] In one exemplary embodiment of this application, the transmission mechanism includes: a rocker arm that is rotatable under the drive of the circuit breaker, and the rocker arm is configured as the input end; an output member that is oscillating under the drive of the rocker arm, and the output member is configured as the output end; and a transmission link, one end of which is connected to the upper valve leaf and the lower valve leaf, and the other end of which is connected to the output member.

[0007] In one exemplary embodiment of this application, the transmission mechanism further includes an intermediate connecting rod, the two ends of which are respectively hinged to the rocker arm and the output component, for converting the rotation of the rocker arm into the oscillation of the output component.

[0008] In one exemplary embodiment of this application, when the upper and lower flaps are in the closed state, the distance between the hinge point of the rocker arm connecting the intermediate link and the rotation center of the rocker arm is greater than the distance between the force point on the rocker arm that contacts the circuit breaker and the rotation center.

[0009] In one exemplary embodiment of this application, the output component includes a first output component and a second output component. The first output component is connected to the lower door leaf via a first transmission link, and the second output component is connected to the upper door leaf via a second transmission link. The end of the first output component away from the first transmission link and the end of the second output component away from the second transmission link are coaxially arranged.

[0010] In one exemplary embodiment of this application, when the upper and lower flaps are in the closed state, the horizontal plane where the rotation center of the rocker arm is located coincides with the horizontal plane where the rotation axis shared by the first output member and the second output member is located.

[0011] In one exemplary embodiment of this application, the rocker arm is provided with a roller, the roller is in contact with the valve drive plate of the circuit breaker, and the roller can rotate during the movement of the valve drive plate to drive the rocker arm to swing around its rotation center.

[0012] In one exemplary embodiment of this application, the transmission mechanism further includes a mounting bracket and a return spring. The rocker arm is rotatably mounted on the mounting bracket. One end of the return spring is connected to the mounting bracket, and the other end acts on the rocker arm to drive the rocker arm, the upper door leaf, and the lower door leaf to return to the closed state.

[0013] In one exemplary embodiment of this application, the switch cabinet door system further includes a guide shaft and a limiting baffle. The guide shaft extends in the moving direction of the upper door leaf and the lower door leaf; the limiting baffle is disposed on the guide shaft to restrict the movement of the upper door leaf and the lower door leaf.

[0014] In one exemplary embodiment of this application, the motion conversion device includes a first motion conversion device and a second motion conversion device, which are respectively disposed on opposite sides of the upper flap / lower flap in the length direction.

[0015] The switchgear door system of this application has at least the following beneficial effects: The switchgear door system provided in this application includes a motion conversion device, which comprises an input end, an output end, and a transmission mechanism connecting the input end and the output end. The transmission mechanism enables the output end to move at a speed greater than the linear drive speed of the circuit breaker received by the input end when the door is open. By amplifying the speed through the transmission mechanism, it ensures that the upper and lower door flaps can open to a safe position at a faster speed than the circuit breaker, thus resolving the inherent contradiction between insufficient safety clearance due to space constraints and motion interference. This achieves a reduction in interference during circuit breaker operation while meeting strict safety clearance requirements.

[0016] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] Figure 1 A schematic diagram of the contact structure between the valve drive board of a circuit breaker and the switching valve system provided in some embodiments is shown.

[0020] Figure 2 A schematic diagram of the structure of a switching valve system provided in some embodiments is shown.

[0021] Figure 3 A schematic diagram of the left side structure of a motion conversion device provided in some embodiments is shown.

[0022] Figure 4 A schematic diagram of the right side structure of a motion conversion device provided in some embodiments is shown.

[0023] Figure 5 A schematic diagram of a reset spring fixed to a mounting bracket is shown in some embodiments.

[0024] Figure 6 A schematic diagram of the structure of the transmission mechanism controlling the opening of the valve leaf provided in some embodiments is shown.

[0025] Figure 7 A schematic diagram of the structure provided in some embodiments, showing the roller located within the groove of the valve drive plate, is shown.

[0026] Figure 8 A simulation comparison diagram of the transmission mechanism of this application provided in some embodiments and the transmission mechanism in related technologies is shown.

[0027] Figure 9 A simulation comparison diagram of the transmission mechanism of this application provided in some embodiments and the transmission mechanism in related technologies is shown.

[0028] Figure 10 A schematic diagram showing a simulation comparison of the motion trajectory of the transmission mechanism provided in this application and the transmission mechanism in related technologies is presented in some embodiments.

[0029] Figure 11 A schematic diagram showing a simulation comparison of the trajectory points of the transmission mechanism provided in this application and the transmission mechanism in related technologies is presented in some embodiments.

[0030] Explanation of reference numerals in the attached figures: 10. Switchgear door system; 100. Upper door leaf; 200. Lower door leaf; 300. Motion conversion device; 300a. First motion conversion device; 310. Transmission mechanism; 310a. First transmission mechanism; 310b. Second transmission mechanism; 311. First rocker arm; 312. Second rocker arm; 313. First output component; 314. Second output component; 315. First transmission link; 316. Second transmission link; 317. First intermediate link; 318. Second intermediate link; 319. Mounting support; 3100. Return spring; 3110. First roller; 3120. Second roller; 400. Fixing plate; 500. Guide shaft; 610. First limit baffle; 620. Second limit baffle; 630. Third limit baffle; 20. Circuit breaker; 21. Door drive plate. Detailed Implementation

[0031] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0032] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0035] See Figure 1 As shown, this application provides a switchgear door system 10, which is applied in miniaturized and compact switchgear. It mainly addresses the technical problems of insufficient clearance between the door leaf and the stationary contact (e.g., increasing from 112mm to the standard requirement of 125mm or more) and motion interference between the door leaf and the circuit breaker 20 staggered contact fingers after increasing the clearance.

[0036] The switchgear valve system 10 mainly includes an upper valve leaf 100, a lower valve leaf 200, and a motion conversion device 300. The motion conversion device 300, through an optimized linkage mechanism, converts the relatively slow, uniform linear pushing force of the circuit breaker 20 during its forward movement into a rapid, preemptive linear opening motion of the valve leaf. Specifically, this mechanism is designed with speed amplification characteristics, meaning that in the initial stage of valve opening, the speed at which the valve leaf moves is greater than the moving speed of the circuit breaker 20 itself. This allows the valve leaf to quickly open to a sufficient extent before the circuit breaker 20's staggered contact fingers reach their edges, thus perfectly avoiding interference and scratching. Simultaneously, because the motion conversion device 300 allows the entire valve system to move backward (towards the stationary contact) to a position ≥125mm from the stationary contact, when the circuit breaker 20 moves forward / backward the same distance, the upper valve leaf 100 and the lower valve leaf 200 are quickly opened to a position that allows the circuit breaker 20's staggered contact fingers to pass smoothly.

[0037] Furthermore, the motion conversion device 300 designed in this application, while achieving the aforementioned rapid opening function, has an extremely compact overall structure, with its space occupied entirely within the space range of the original valve system. This means that during installation and replacement, the structure and position of other components inside the switch cabinet (such as the stationary contact box, busbars, etc.) do not require any adjustments, allowing for direct interchangeability with the original valve system. This feature greatly improves the convenience and flexibility of the new valve system and reduces equipment upgrade and modification costs.

[0038] Its specific structure, working process and effects are described in detail below.

[0039] See Figure 2 As shown, this embodiment provides a switch cabinet door system 10, which includes an upper door leaf 100, a lower door leaf 200, and a first motion conversion device 300a and a second motion conversion device arranged along the length of the upper door leaf 100 / lower door leaf 200. The first motion conversion device 300a and the second motion conversion device have a symmetrical structure and have the same structure, working principle, and components. By driving symmetrically on both sides, the jamming or skewing of the door leaf that may be caused by driving on one side is effectively reduced, ensuring the smoothness and reliability of the door movement. The following detailed description uses the motion conversion device 300 on one side as an example (taking the first motion conversion device 300a as an example).

[0040] In some embodiments, the first motion conversion device 300a includes an input terminal, an output terminal, and a transmission mechanism 310. The input terminal receives linear driving force from the circuit breaker 20. The output terminal outputs amplified motion to drive the upper valve leaf 100 and the lower valve leaf 200 to move in opposite directions in a linear motion. The transmission mechanism 310 is connected between the input terminal and the output terminal, and is configured such that, in the initial stage of opening the upper valve leaf 100 and the lower valve leaf 200, the motion speed of the output terminal is greater than the motion speed of the input terminal. By providing a motion conversion device 300 with this speed amplification function, it is ensured that the valve leaf can open to a safe position quickly before the circuit breaker 20, fundamentally solving the motion interference problem that inevitably arises after increasing the clearance, thereby meeting the requirements of safe clearance (≥125mm) and smooth operation without altering other structures of the switchgear.

[0041] In some embodiments, see Figure 3As shown, the transmission mechanism 310 may include a rocker arm, an output component, and a transmission link. The rocker arm is configured as the input end and is capable of rotating about its rotation center under the action of the circuit breaker 20 drive plate. The output component is configured as the output end and is capable of oscillating under the drive of the rocker arm. The output component is connected to the upper valve leaf 100 and the lower valve leaf 200 via the transmission link, converting the oscillation of the output component into linear motion of the upper valve leaf 100 and the lower valve leaf 200.

[0042] In some embodiments, the transmission mechanism 310 further includes an intermediate link. The two ends of the intermediate link are hinged to the rocker arm and the output member, respectively, so as to more effectively convert the rotation of the rocker arm into the oscillation of the output member.

[0043] It is understandable that, when the flaps are opened, in order to drive the upper flap 100 and the lower flap 200 to move in different directions, the transmission mechanism 310 includes a first transmission mechanism 310a and a second transmission mechanism 310b, respectively. The first transmission mechanism 310a and the second transmission mechanism 310b have the same structure and components. Specifically, the first transmission mechanism 310a drives the lower flap 200 to move, and the second transmission mechanism 310b drives the upper flap 100 to move.

[0044] In some embodiments, see Figure 3 As shown, the first transmission mechanism 310a includes a first rocker arm 311, a first output component 313, a first intermediate connecting rod 317, and a first transmission connecting rod 315. The two ends of the first intermediate connecting rod 317 are hinged to the first rocker arm 311 and the first output component 313 at points A1 and D1, respectively. The end of the first output component 313 away from the first rocker arm 311 is connected to the first transmission connecting rod 315 at point E1. The second transmission mechanism 310b includes a second rocker arm 312, a second output component 314, a second intermediate connecting rod 318, and a second transmission connecting rod 316. The two ends of the second intermediate connecting rod 318 are hinged to the second rocker arm 312 and the second output component 314 at points A2 and D2, respectively. The end of the second output component 314 away from the second rocker arm 312 is connected to the second transmission connecting rod 316 at point E2.

[0045] In some embodiments, see Figure 3As shown, when the upper valve 100 and lower valve 200 are in the closed state, the distance (L1) between the hinge point (A1) connecting the first intermediate link 317 on the first rocker arm 311 and the rotation center (O) of the first rocker arm 311 is designed to be greater than the distance (L2) between the force point on the first rocker arm 311 used to contact the circuit breaker 20 (the center of the first roller 3110, point B, as described below) and the rotation center (O), i.e., L1>L2. According to the lever principle and kinematic analysis, when the first rocker arm 311 is pushed by the circuit breaker 20 drive plate at a speed V1, in the initial opening stage, the linear velocity of the hinge point A1 is greater than V1, thereby transmitting an amplified velocity to the first output component 313 through the first intermediate link 317, ultimately making the opening speed V2>V1 of the lower valve 200. Similarly, the transmission relationship between the second rocker arm 312 and the second output component 314 is also the same.

[0046] The aforementioned lever arm ratio (L1>L2) is key to achieving speed amplification. The ratio of L1 to L2 can be selected between 1.2 and 1.8, for example, 1.2, 1.5, or 1.8. This range ensures a significant speed increase while avoiding excessively large mechanism dimensions or deteriorated stress conditions. This unequal-arm lever design allows the output component to achieve a higher speed than the input component during the initial valve opening phase.

[0047] In some embodiments, see Figure 3 As shown, the first output component 313 and the second output component 314 are arranged coaxially away from the ends of their respective transmission links, meaning they are rotatably supported on the same axis or have coincident rotation axes. This cross connection and coaxial arrangement not only realizes the reverse movement of the upper and lower hinged doors 200, but also makes the drive structure very compact and symmetrical, with reasonable force transmission, improving the rigidity and stability of the system.

[0048] Understandably, the first output component 313 drives the lower valve leaf 200 via the first transmission link 315, while the second output component 314 drives the upper valve leaf 100 via the second transmission link 316, thus forming a cross connection between the first output component 313 and the second output component 314. This cross connection and the coaxial arrangement of the first output component 313 and the second output component 314 not only enable the reverse movement of the upper valve leaf 100 and the lower valve leaf 200, but also make the transmission mechanism 310 more compact and symmetrical, improving the rigidity and stability of the motion transmission device, while simplifying the assembly process.

[0049] In some embodiments, see Figure 3As shown, when the upper valve 100 and lower valve 200 are closed, the horizontal plane containing the rotation center (point O) of the first rocker arm 311 / second rocker arm 312 coincides with the horizontal plane containing the rotation axis (point C) shared by the first output component 313 and the second output component 314. Furthermore, when the upper valve 100 and lower valve 200 are closed, the lines connecting the rotation center (point O) of the first rocker arm 311 / second rocker arm 312, the hinge points (A1 / A2) of the first intermediate connecting rod 317 / second intermediate connecting rod 318 and the first rocker arm 311 / second rocker arm 312, and the hinge points (D1 / D2) of the first intermediate connecting rod 317 and second intermediate connecting rod 318 and the first output component 313 / second output component 314 can form an obtuse triangle. The line connecting the rotation center of the rocker arm and the hinge points of the intermediate connecting rods and the output components is horizontal.

[0050] This horizontally aligned layout optimizes the mechanical and kinematic performance of the mechanism in its initial position, helping to ensure the initial synchronicity and smoothness of the valve's opening and closing actions. The obtuse-angled triangle achieves optimal acceleration and motion trajectory.

[0051] In some embodiments, the distance (L0) between the rotation center (point O) of the first rocker arm 311 and the rotation axis (point C) shared by the first output member 313 and the second output member 314 can be in the range of 40mm to 100mm, for example, 40, 60, or 100mm. This distance range is designed to ensure smooth, interference-free movement of the mechanism while controlling the lateral dimensions of the entire drive unit, thereby ensuring it can be accommodated within the installation space of the existing valve system for direct replacement.

[0052] In some embodiments, see Figure 3 and Figure 4As shown, when the upper valve 100 and lower valve 200 are in the closed state, the hinge point D1 between the first intermediate link 317 and the first output member 313 is located below the rotation axis C, while the hinge point D2 between the second intermediate link 318 and the second output member 314 is located above the rotation axis C. The hinge points D1 and D2 of the first intermediate link 317 and the first output member 313 are staggered on the horizontal plane, being neither on the same axis nor at the same height. Simultaneously, the hinge point E1 between the first output member 313 and the first transmission link 315 is horizontally offset from the hinge point A1 between the first intermediate link 317 and the first rocker arm 311. Similarly, the hinge point E2 between the second output member 314 and the second transmission link 316 is also offset from the hinge point A2 between the second intermediate link 318 and the second rocker arm 312, and the offset directions are opposite. This design, which precisely staggers all key hinge points in three-dimensional space, enables the entire mechanism to achieve dual-sided drive, no motion interference throughout the entire process, and ensures that both sides have two transmission angles (reducing dead points) in an extremely compact space, significantly improving the reliability and efficiency of the motion.

[0053] In some embodiments, see Figure 5 As shown, the transmission mechanism 310 may further include a mounting bracket 319 and a return spring 3100. The first rocker arm 311 and the second rocker arm 312 are rotatably mounted on the mounting bracket 319. One end of the return spring 3100 is connected to a slot on the mounting bracket 319, and the other end acts on the first rocker arm 311 or the second rocker arm 312.

[0054] In some embodiments, the return spring 3100 may be a torsion spring, which is sleeved on the rotation shaft of the first rocker arm 311 and the second rocker arm 312. One end of the return spring 3100 is fixed to the mounting bracket 319, and the other end acts on the arm of the first rocker arm 311 or the second rocker arm 312. The preload of the return spring 3100 needs to be calculated and selected to ensure that it can reliably overcome the weight and friction of the valve leaf and its transmission mechanism 310, and achieve complete reset.

[0055] Understandably, the mounting bracket 319 provides a stable foundation for the entire transmission mechanism 310. The return spring 3100 ensures that the valve system can automatically and reliably return to the closed state after the circuit breaker 20 is released, thus ensuring safety.

[0056] In other embodiments, the reset spring 3100 may also employ a tension spring or a compression spring in conjunction with a lever mechanism to achieve the reset function.

[0057] In some embodiments, see Figure 3As shown, a first roller 3110 is provided at the end of the first rocker arm 311. A second roller 3120 is provided at the end of the second rocker arm 312. The first roller 3110 and the second roller 3120 are used to contact the valve drive plate 21 of the circuit breaker 20 and roll during the movement of the drive plate. The working process is as follows: when the circuit breaker 20 is rocked into the cabinet, the valve drive plate 21 on it moves forward accordingly. The inclined surface or boss at the front end of the drive plate first contacts the first roller 3110 and the second roller 3120 on the first rocker arm 311 and the second rocker arm 312. As the circuit breaker 20 continues to advance, the drive plate pushes the rollers, thereby forcing the first rocker arm 311 and the second rocker arm 312 to rotate around their rotation center against the force of the return spring 3100 (for example, the first rocker arm 311 rotates counterclockwise).

[0058] By using rollers, sliding friction is transformed into rolling friction, which significantly reduces driving force, wear, and operating noise, while improving ease of operation and the lifespan of the device.

[0059] In some embodiments, see Figure 2 As shown, the switchgear valve system 10 may further include a fixing plate 400. The fixing plate 400 is vertically placed between the stationary contact and the circuit breaker 20, and has an opening thereon. When the upper valve leaf 100 and the lower valve leaf 200 are closed, the opening on the fixing plate 400 is covered to separate the stationary contact from the circuit breaker 20. In some embodiments, see Figure 2 As shown, the switchgear door system 10 may further include a guide shaft 500. The guide shaft 500 extends in the moving direction of the upper door leaf 100 and the lower door leaf 200, providing precise linear guidance. For example, both the upper door leaf 100 and the lower door leaf 200 are provided with sliding portions and sliding holes. The upper door leaf 100 and the lower door leaf 200 are sleeved on the outside of the guide shaft 500 through the sliding holes. The upper door leaf 100 is detachably connected to the second transmission link 316 by bolts or rivets, and the lower door leaf 200 is detachably connected to the first transmission link 315 by bolts or rivets, so that the upper door leaf 100 and the lower door leaf 200 can move in opposite directions in the extending direction of the guide shaft 500 under the action of the second transmission link 316 and the first transmission link 315.

[0060] In some embodiments, the switch cabinet door system 10 may further include a limiting baffle. The limiting baffle can be detachably fixed to the fixing plate 400 by means of adhesive or snap-fit. The limiting baffle has a through hole passing through the axis of the guide shaft 500. The guide shaft 500 passes through the through hole. The limiting baffle can limit the travel of the upper door leaf 100 and the lower door leaf 200.

[0061] In some embodiments, see Figure 2 As shown, the fixed plate 400 is provided with a first limiting baffle 610, a second limiting baffle 620, and a third limiting baffle 630. The first limiting baffle 610, the second limiting baffle 620, and the third limiting baffle 630 are arranged sequentially at intervals on the axis of the guide shaft 500, with the second limiting baffle 620 located between the first limiting baffle 610 and the third limiting baffle 630. The sliding part of the lower flap 200 is located between the second limiting baffle 620 and the third limiting baffle 630, which are used to limit the movement stroke of the lower flap 200. The first limiting baffle 610 is located below the sliding part of the upper flap 100, and it can be used to prevent the upper flap 100 from moving downward and colliding with the lower flap 200.

[0062] In other embodiments, the limiting baffle may also be an adjusting nut screwed onto the thread at the end of the guide shaft 500, or a cotter pin passing through the pin hole at the end of the guide shaft 500. The advantage of using an adjusting nut is that the maximum opening stroke of the valve leaf can be finely adjusted by turning the nut to accommodate the needs of different types of circuit breakers 20, thus enhancing the system's adaptability. To ensure that the valve leaf does not twist during movement, additional guide grooves or guide rails can be added to the valve leaf to cooperate with corresponding guide rails or guide grooves fixed on the switch cabinet, forming a dual-guide or multi-point guide system.

[0063] Understandably, the guide shaft 500 and the limit baffle together ensure the accuracy of the valve leaf's movement trajectory and the reliability of its terminal position, preventing it from disengaging or failing to close properly.

[0064] The opening process of the upper valve 100 and lower valve 200 is achieved through the aforementioned transmission mechanism 310: when the circuit breaker 20 is rocked into the cabinet, the valve drive plate 21 on it moves forward accordingly. The inclined surface or boss at the front end of the valve drive plate 21 first contacts the first roller 3110 and the second roller 3120 on the first rocker arm 311 and the second rocker arm 312, respectively. As the circuit breaker 20 continues to advance, the drive plate pushes the first roller 3110 and the second roller 3120 to rotate in different directions, thereby forcing the first rocker arm 311 and the second rocker arm 312 to rotate around their rotation center against the force of the return spring 3100 (for example, the first rocker arm 311 rotates counterclockwise and the second rocker arm 312 rotates clockwise). The rotation of the first rocker arm 311 is transmitted to the first output member 313 through the first intermediate connecting rod 317, causing it to swing. Due to the leverage effect of L1>L2, the swing speed of the first output member 313 is amplified in the initial stage. The oscillation of the first output component 313 is converted into a downward linear motion of the lower valve leaf 200 along the guide shaft 500 via the first transmission link 315. Similarly, the rotation of the second rocker arm 312 is converted into an upward linear motion of the upper valve leaf 100 along the guide shaft 500 via the second intermediate link 318, the second output component 314, and the second transmission link 316. In this way, the upper valve leaf 100 and the lower valve leaf 200 move rapidly in opposite directions, completing the opening action. When the circuit breaker 20's pentagonal contact reaches the valve position, the valve is fully open, effectively clearing the passage. At this time, when the valve is fully open, the first roller 3110 and the second roller 3120 are completely located within the groove of the drive plate, which defines the shape of the transmission mechanism 310, thereby ensuring that the upper valve leaf 100 and the lower valve leaf 200 are in the open state. That is, before the first roller 3110 and the second roller 3120 slide into the groove of the drive plate, the transmission mechanism 310 can drive the upper valve leaf 100 and the lower valve leaf 200 to move. After they move into the groove, the transmission mechanism 310 no longer controls the movement of the upper valve leaf 100 and the lower valve leaf 200. See [reference needed]. Figure 6 and Figure 7 As shown.

[0065] Closing Process: When the circuit breaker 20 is swung out of the cabinet, the pressure of its valve drive plate 21 on the rollers gradually decreases until it disappears. At this time, the compressed or torn return spring 3100 releases its stored energy, driving the first rocker arm 311 and the second rocker arm 312 to rotate in opposite directions. Through the reverse transmission of the aforementioned drive chain, this ultimately pulls the upper valve leaf 100 and the lower valve leaf 200 to move towards each other along the guide shaft 500 until they are completely closed, re-isolating the stationary contact. See [link to relevant documentation]. Figure 3 As shown.

[0066] It should be noted that achieving speed amplification does not solely rely on the aforementioned transmission mechanism 310. This transmission mechanism 310 can also employ other mechanisms capable of motion conversion and speed transformation, such as rack and pinion mechanisms, cam mechanisms, or non-circular gear mechanisms. The key is that it can achieve an output speed greater than the input speed during the initial opening of the valve.

[0067] In some embodiments, the upper hinge 100 and lower hinge 200 are preferably made of high-strength engineering plastics (such as nylon PA66 reinforced with glass fiber) or epoxy resin insulating boards by injection molding or cutting to ensure their insulation performance and mechanical strength. The first rocker arm 311, second rocker arm 312, first intermediate connecting rod 317 and second intermediate connecting rod 318, first output component 313, second output component 314, first transmission connecting rod 315 and second transmission connecting rod 316 are preferably made of metal materials, such as steel or aluminum alloy, and manufactured by stamping, precision casting or machining processes to ensure the rigidity and durability of the transmission components. Lubricated bearings or self-lubricating bushings can be press-fitted into each hinge hole to further reduce friction and wear.

[0068] See Figures 8 to 11 The simulation comparison diagram shown shows that, compared with the transmission mechanism 310 in the related technology, the opening speed of the upper valve leaf 100 and the lower valve leaf 200 of this application is faster, which can meet the requirement that the valve is fully open when the circuit breaker 20 moves to the valve position, and can reduce the number of staggered contact fingers.

[0069] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0070] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A switchgear door system, comprising an upper door leaf and a lower door leaf, characterized in that, The switchgear door system also includes a motion conversion device, which further includes: The input terminal is used to receive the linear driving force of the circuit breaker; The output end is used to drive the upper and lower flaps to move in opposite linear motions. A transmission mechanism is connected between the input end and the output end. The transmission mechanism is configured such that when the upper and lower flaps are open, the movement speed of the output end is greater than the movement speed of the input end.

2. The switchgear door system according to claim 1, characterized in that, The transmission mechanism includes: A rocker arm that is rotatable under the drive of the circuit breaker, and the rocker arm is configured as the input terminal; An output element that is oscillating under the drive of the rocker arm, and the output element is configured as the output terminal; A transmission link, one end of which is connected to the upper and lower hinged doors, and the other end of which is connected to the output component.

3. The switchgear door system according to claim 2, characterized in that, The transmission mechanism also includes an intermediate connecting rod, the two ends of which are hinged to the rocker arm and the output component, respectively, for converting the rotation of the rocker arm into the oscillation of the output component.

4. The switchgear door system according to claim 3, characterized in that, When the upper and lower flaps are closed, the distance between the hinge point of the rocker arm connecting the intermediate link and the rotation center of the rocker arm is greater than the distance between the force point on the rocker arm that contacts the circuit breaker and the rotation center.

5. The switchgear door system according to claim 2, characterized in that, The output component includes a first output component and a second output component. The first output component is connected to the lower hinged door through a first transmission link, and the second output component is connected to the upper hinged door through a second transmission link. Wherein, the end of the first output component away from the first transmission link and the end of the second output component away from the second transmission link are coaxially arranged.

6. The switchgear door system according to claim 5, characterized in that, When the upper and lower flaps are closed, the horizontal plane where the rotation center of the rocker arm is located coincides with the horizontal plane where the rotation axis shared by the first and second output components is located.

7. The switchgear door system according to claim 2, characterized in that, The rocker arm is equipped with a roller, which contacts the valve drive plate of the circuit breaker. The roller can rotate during the movement of the valve drive plate to drive the rocker arm to swing around its rotation center.

8. The switchgear door system according to claim 2, characterized in that, The transmission mechanism further includes a mounting bracket and a return spring. The rocker arm is rotatably mounted on the mounting bracket. One end of the return spring is connected to the mounting bracket, and the other end acts on the rocker arm to drive the rocker arm, the upper door leaf, and the lower door leaf to return to the closed state.

9. The switchgear door system according to claim 1, characterized in that, The switch cabinet door system also includes a guide shaft and a limiting baffle. The guide shaft extends in the moving direction of the upper door leaf and the lower door leaf. The limiting baffle is disposed on the guide shaft to restrict the movement of the upper door leaf and the lower door leaf.

10. The switchgear door system according to claim 1, characterized in that, The motion conversion device includes a first motion conversion device and a second motion conversion device, which are respectively located on opposite sides of the upper flap / lower flap along the length direction.

Images