Circuit breaker mechanism and circuit breaker using the same

Abstract

The present invention relates to the field of manufacturing power distribution switch control equipment for the smart grid industry, and in particular to a circuit breaker mechanism and a circuit breaker using the same. The circuit breaker mechanism of the present invention includes: a base, a first cylindrical space with an axis in the vertical direction is formed inside the base; a repulsion mechanism housing is arranged in the first cylindrical space, and a second cylindrical space with an axis in the vertical direction is formed inside the base; an action mechanism includes: a repulsion disk, which is horizontally arranged in the second cylindrical space, a first moving rod, which extends upward from the center of the repulsion disk, and passes through the repulsion mechanism housing and the base; a repulsion mechanism, which is used to drive the action mechanism to move up and down; a holding mechanism, which is used to maintain the closing state and the opening state of the circuit breaker mechanism. Among them, the repulsion mechanism housing can move up and down in the first cylindrical space; under the drive of the repulsion mechanism, the repulsion disk can move from bottom to top in the second cylindrical space, and the movement speed is reduced after hitting the repulsion mechanism housing, thereby reducing bouncing.

Description

Technical Field

[0001] The present invention relates to the field of manufacturing power distribution switch control equipment for smart grid industry, and in particular to a circuit breaker mechanism and a circuit breaker using the same. Background Art

[0002] With the rapid development of industrialization and urbanization in my country, the demand for electricity will continue to grow for a long period of time. The task of power grid development is arduous, and the development of a robust smart grid is particularly urgent. At the same time, smart grids are also moving towards ultra-high voltage and UHV levels. Therefore, researching and developing high-performance and high-reliability circuit breakers that match them can provide a strong technical guarantee for the safety and reliability of smart grid power supply.

[0003] In order to achieve fast opening and closing of the circuit breaker, the repulsion disk is usually raised at a faster speed, causing the moving contact connected to the repulsion disk to contact the static contact at a faster speed, resulting in a long bounce between the moving contact and the static contact, which affects the circuit breaking performance on the one hand and the life of the circuit breaker on the other. The prior art generally reduces the bounce by adding an overtravel spring. However, this will reduce the closing speed. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The present invention is expected to at least partially solve one of the above technical problems.

[0006] (II) Technical solution

[0007] A first aspect of the present invention provides a circuit breaker mechanism, comprising:

[0008] A base, the interior of which forms a first cylindrical space with its axis along the vertical direction;

[0009] The repulsion mechanism housing is arranged in the first cylindrical space, and the interior of the housing forms a second cylindrical space with the axis in the vertical direction;

[0010] The action mechanism comprises: a repulsion disk horizontally arranged in the second cylindrical space, and a first motion rod extending upward from the center of the repulsion disk and passing through the repulsion mechanism housing and the base;

[0011] The repulsion mechanism is used to drive the action mechanism to move up and down;

[0012] Among them, the repulsion mechanism shell can move up and down in the first cylindrical space; under the drive of the repulsion mechanism, the repulsion disk can move from bottom to top in the second cylindrical space, and after hitting the repulsion mechanism shell, it drives the repulsion mechanism shell to move upward, and the movement speed of the repulsion disk itself is reduced.

[0013] In some embodiments of the present invention, in the closed state, the repulsion disk is located at a high position in the second cylindrical space, and the repulsion mechanism housing is located at a high position in the first cylindrical space; in the open state, the repulsion disk is located at a low position in the second cylindrical space, and the repulsion mechanism housing is located at a low position in the first cylindrical space.

[0014] In some embodiments of the present invention, when switching from the open state to the closed state, the repulsion mechanism drives the repulsion disk to move upward from a low position in the second cylindrical space; after the repulsion disk moves to a high position in the second space, it hits the inner upper surface of the second cylindrical space, pushing the repulsion mechanism shell upward to a high position in the first cylindrical space.

[0015] In some embodiments of the present invention, when switching from the closed state to the open state, the repulsion disk falls from a high position to a low position in the second cylindrical space; the repulsion mechanism housing falls from a high position to a low position in the first cylindrical space.

[0016] In some embodiments of the present invention, it also includes: N compensation limit assemblies, N≥1; the compensation limit assemblies include: a wheel rod component, including: a rotating wheel portion, which is upwardly connected to the inner upper surface of the first cylindrical space through a horizontal rotating pin; a rotating rod portion, which extends from the outer upper portion of the wheel portion toward the radial outer side of the first cylindrical space, and a compensation limit bumper, which is fixed to the outer side of the repulsion mechanism shell, below the rotating rod portion; wherein, when no force is applied, the rotating rod portion of the wheel rod component naturally droops; during the upward movement of the repulsion mechanism shell, the compensation limit bumper is driven to hit the rotating rod portion, causing it to drive the wheel portion to rotate, so that the outer contour of the wheel portion resists the upward moving repulsion mechanism shell.

[0017] In some embodiments of the present invention, it also includes: a holding mechanism for maintaining the closed state and the open state of the circuit breaker mechanism, which is downwardly connected to the first moving rod and upwardly connected to the moving contact of the arc extinguishing mechanism through an insulating pull rod; wherein the moving contact is rigidly connected to the insulating pull rod, the insulating pull rod is rigidly connected to the holding structure, and the holding mechanism is fixed on the base and rigidly connected to the repulsion disk through the first connecting rod.

[0018] In some embodiments of the present invention, within the rotation range of the wheel part, the continuous points on the outer contour of the wheel part that can abut against the outer upper surface of the repulsion mechanism shell constitute a curve S; the end point of the curve S away from the side of the rotating rod part is the first point; when the first point abuts against the repulsion mechanism shell, the vertical distance between the repulsion mechanism shell and the inner upper surface of the first tubular space is H1; the end point of the curve S close to the side of the rotating rod part is the second point; when the second point abuts against the repulsion mechanism shell, the vertical distance between the repulsion mechanism shell and the inner upper surface of the first tubular space is H2; wherein, 0.5mm≤(H1-H2)≤10mm, and in the curve S, there is a smooth transition between the first point and the second point.

[0019] In some embodiments of the present invention, the compensating limit block is in the form of a complete or partial ring, and its inner diameter is D1; ​​the compensating limit component also includes: a compensating limit guide rod, pivotally connected to the tail of the rotating rod part, which passes downward through the compensating limit block, and its outer diameter is D2; wherein, 0.5mm≤(D1-D2)≤10mm.

[0020] In some embodiments of the present invention, the compensating limit bumper is connected to the inner repulsion mechanism housing via a bumper driving connecting rod.

[0021] In some embodiments of the present invention, in the wheel-rod component, the rotating wheel portion and the rotating rod portion are integrally or separately arranged.

[0022] In some embodiments of the present invention, N≥2, and the N limit compensation components are evenly arranged in the circumferential direction of the upper surface of the first cylindrical space.

[0023] In some embodiments of the present invention, the repulsion disk is made of magnetic metal material in whole or in part; the action mechanism also includes: a second moving rod extending downward from the center of the repulsion disk; the repulsion mechanism includes: a first repulsion coil arranged on the inner upper surface of the second cylindrical space, outside the first moving rod; and / or, a second repulsion coil arranged on the inner lower surface of the second cylindrical space.

[0024] The second aspect of the present invention provides a circuit breaker, comprising: an arc extinguishing mechanism, comprising: a vacuum bubble; a static contact and a moving contact, which are arranged in the vacuum bubble; the above circuit breaker mechanism is arranged at the lower part of the arc extinguishing mechanism, and the first moving rod is connected to the moving contact of the arc extinguishing mechanism upward through the retaining mechanism and the insulating pull rod in sequence.

[0025] (III) Beneficial effects

[0026] It can be seen from the above technical solution that the present invention has at least one of the following beneficial effects compared with the prior art:

[0027] (1) Rigid connection resulting in short tripping time

[0028] The moving contact is rigidly connected to the insulating pull rod, the insulating pull rod is rigidly connected to the holding structure, and the holding mechanism is fixed on the base and rigidly connected to the repulsion disk through the first connecting rod. It can be seen that the driving disk and the vacuum bubble moving contact are all rigidly connected, and there are no elastic elements such as overtravel springs. When the driving disk moves, it directly drives the moving contact to open the gate. The movement is just opening, which is greatly shortened compared to the just opening time of ordinary circuit breakers. The just opening time can be increased to less than 0.5ms, breaking through the bottleneck of 1ms opening of mechanical circuit breakers, and has a good prospect of use in special occasions.

[0029] (2) The repulsion mechanism housing can move up and down to reduce bouncing

[0030] The repulsion mechanism housing is designed to move up and down. When the repulsion disk moves upward, part of the upward kinetic energy of the repulsion disk is absorbed by the repulsion mechanism housing, thereby reducing the speed at which the moving contact closes the static contact and reduces bounce.

[0031] (3) The compensation limit mechanism solves the compensation problem after contact wear

[0032] The rotating rod component is a rotatable device. When the repulsion mechanism is opened, the limit compensation device is reset under the action of gravity. When closing the switch, the shell of the repulsion mechanism pushes the limit compensation device to the required position. Through the structure and appearance design of the limit compensation device, the overall displacement of the repulsion mechanism when closing the switch is 0.5-10mm and fully rigid contact is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 and Figure 2 They are cross-sectional schematic diagrams of the circuit breaker in the open state and the closed state according to the embodiment of the present invention respectively.

[0034] Figure 3 for Figure 1 A schematic diagram of adaptive compensation of the compensation limit assembly in the case of wear of the moving contact in the circuit breaker is shown.

[0035] Figure 4 for Figure 1 An enlarged view of the interaction between the compensation limit assembly and the repulsion mechanism housing in the circuit breaker is shown.

[0036] Figure 5 for Figure 1 An enlarged view of the interaction between the compensation limit assembly and the repulsion mechanism housing when the moving contact in the circuit breaker is partially worn is shown. DETAILED DESCRIPTION

[0037] The inventive concept of the present invention is that by setting the repulsion mechanism housing to be able to move up and down in the first cylindrical space, the repulsion mechanism housing can absorb part of the kinetic energy of the repulsion disk during the rising process, reduce the movement speed of the repulsion disk, reduce the contact speed of the moving contact and the static contact, and reduce the closing bounce. Furthermore, by adaptively compensating the loss of the moving contact length through the compensation limit assembly, the zero overtravel design of the circuit breaker mechanism is realized, which can not only reduce the closing bounce, but also increase the just-opening time, and can also ensure the contact pressure of the moving contact after the size is reduced due to mechanical wear and arc burning.

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific implementation methods and with reference to the accompanying drawings.

[0039] A first aspect of the present invention provides a circuit breaker. Figure 1 and Figure 2The schematic cross-sectional views of the circuit breaker in the open state and the closed state are shown in FIG. Figure 1 and Figure 2 As shown, the circuit breaker of this embodiment includes:

[0040] The arc extinguishing mechanism 100 comprises: a vacuum bubble 110; a static contact 121 and a moving contact 122, which are arranged in the vacuum bubble;

[0041] The circuit breaker mechanism 200 is arranged at the lower part of the arc extinguishing mechanism, and the upper end of the mechanism is kept upward, and is connected to the moving contact of the arc extinguishing mechanism through the insulating pull rod 201.

[0042] Those skilled in the art should understand that although the circuit breaker mechanism and the arc extinguishing mechanism are described together in this embodiment, it is only for the convenience of understanding. In fact, the circuit breaker mechanism in this embodiment can be manufactured, used, sold, promised for sale, imported, etc. independently. Therefore, the circuit breaker mechanism without the arc extinguishing mechanism is also within the protection scope of the present invention.

[0043] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the circuit breaker mechanism 200 includes:

[0044] The base 210 has a first cylindrical space C1 formed inside thereof with its axis in the vertical direction;

[0045] The repulsion mechanism housing 220 is disposed in the first cylindrical space C1, and the interior thereof forms a second cylindrical space C2 with the axis along the vertical direction;

[0046] The action mechanism 230 includes: a repulsion disk 231, which is horizontally arranged in the second cylindrical space C2; ​​a first movement rod 232, which extends upward from the center of the repulsion disk and passes through the repulsion mechanism housing and the base; and a second movement rod 233, which extends downward from the center of the repulsion disk;

[0047] The repulsion mechanism 240 is used to drive the action mechanism to move up and down;

[0048] A holding mechanism 250 is used to maintain the opening state and the closing state of the circuit breaker mechanism, which is connected downwardly to the first moving rod 232 and upwardly to the moving contact 122 through the insulating pull rod 201;

[0049] Two limit compensation components 260 are symmetrically arranged on the periphery of the repulsion mechanism housing 220, and are used to decelerate the upward movement of the repulsion mechanism housing and adjust the high position of the repulsion mechanism housing.

[0050] The various components of the circuit breaker mechanism of this embodiment are described below.

[0051] In this embodiment, the holding mechanism 250 is connected downward to the first moving rod 232 and upward to the moving contact 122 of the arc extinguishing mechanism through the insulating pull rod 201. The holding mechanism 250 is a linear or nonlinear pressure holding mechanism, and the stroke is greater than the total motion stroke of the action mechanism by 1 mm or more.

[0052] The holding mechanism 250 is used to provide a closing and opening holding force for the circuit breaker, and the holding force can keep the circuit breaker in a stable closing and opening state. Specifically:

[0053] (1) Figure 1 As shown, in the open state, the holding mechanism 250 generates an upward holding force, the repulsion disk 231 is located at a low position in the second cylindrical space C2, and the repulsion mechanism housing 220 is located at a low position in the first cylindrical space C1.

[0054] (2) Figure 2 As shown, in the closed state, the holding mechanism 250 generates a downward holding force, the repulsion disk 231 is located at a high position in the second cylindrical space C2, and the repulsion mechanism housing 220 is located at a high position in the first cylindrical space C1.

[0055] Those skilled in the art should understand that the above are only preferred embodiments of the present invention. In other embodiments of the present invention, the first movement rod may also be directly connected upward to the insulating pull rod, and the holding mechanism maintains the circuit breaker in a stable opening and closing state in a non-contact manner. These variants can also implement the present invention and are also within the protection scope of the present invention.

[0056] In this embodiment, the repulsion disk 231 is made of magnetic metal material in whole or in part. The repulsion mechanism 240 is used to drive the action mechanism to move up and down, including:

[0057] The first repulsion coil 241 is disposed on the inner upper surface of the second cylindrical space C2, the upper part of the repulsion disk 231, and the outer side of the first movement rod 232;

[0058] The second repulsion coil 242 is disposed on the inner lower surface of the second cylindrical space C2 , on the upper portion of the repulsion disk 231 , and on the outer side of the second movement rod 233 .

[0059] Those skilled in the art should understand that the second moving rod 233 serves to guide the direction of movement of the repulsion disk 231. In the case where the direction of movement of the repulsion disk can be maintained by other means, the second moving rod can be omitted. In addition, two repulsion coils are provided in the present embodiment, but in other embodiments of the present invention, only one repulsion coil may be provided to realize the up and down movement of the repulsion disk, or only realize the upward drive of the repulsion disk, and rely on the gravity of the repulsion disk itself to realize the downward movement of the repulsion disk. These variants can also realize the present invention and are also within the protection scope of the present invention.

[0060] Different from the prior art in which the repulsion mechanism housing is fixed in the base space, in this embodiment, the repulsion mechanism housing 220 can move up and down in the first cylindrical space. Under the premise of such a structural design:

[0061] (1) Switching from the open state to the closed state

[0062] The repulsion mechanism 240 drives the repulsion disk 231 to move upward from the low position in the second cylindrical space C2; ​​after the repulsion disk 231 moves to the high position in the second cylindrical space, it hits the inner upper surface of the second cylindrical space C2, pushing the repulsion mechanism housing 220 upward to the high position in the first cylindrical space. At this time, part of the kinetic energy of the repulsion disk 231 is transferred to the repulsion mechanism housing 220, so that the movement speed of the repulsion disk 231 itself is reduced. In this case, the speed at which the moving contact 122 closes the static contact 121 is reduced, thereby reducing the bounce of the moving contact 122 and improving the performance and life of the circuit breaker.

[0063] (2) Switching from the closed state to the open state

[0064] The repulsion disk 231 drops from a high position to a low position in the second cylindrical space C2. The repulsion mechanism housing 220 drops from a high position to a low position in the first cylindrical space C1.

[0065] Furthermore, in the process of realizing the present invention, the applicant also found that: in the prior art, an overtravel device is used to compensate for the burnout of ordinary circuit breaker contacts, which is generally a contact spring. The functions of the contact spring are: (a) to ensure that the moving contact can still maintain a certain contact pressure after electrical wear; (b) to use the contact spring force to buffer and reduce bounce when the moving contact is closed; (c) when the contact is opened, the moving contact obtains a certain initial kinetic energy, breaks the fusion welding point, increases the initial opening speed, reduces the arcing time, and thus increases the speed of medium recovery. However, during the opening process, the mechanism needs to move until the overtravel ends before it can be completely opened, which greatly affects the opening speed.

[0066] In order to solve the above technical problems, this embodiment also provides a technical solution for realizing adaptive compensation limit of the moving contact through a compensation limit component.

[0067] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the circuit breaker mechanism 200 further includes: two compensation limiter components 260, which are evenly distributed in the circumferential direction of the repulsion mechanism housing. The compensation limiter components are the closing state limiter devices of the repulsion mechanism housing, and the limit position has an upward movement distance of 1 mm or more.

[0068] Those skilled in the art should understand that the present invention has no limitation on the number of compensation limiter components, and even if there is only one, the present invention can be partially implemented, but the symmetry and balance of the repulsion mechanism housing will be deteriorated. Preferably, the circuit breaker mechanism can include 2 to 4 compensation limiter components evenly distributed in the circumferential direction of the repulsion mechanism housing.

[0069] The compensation limit assembly 260 is divided into two parts: a wheel rod component 261 connected to the inner upper surface of the first cylindrical space, a compensation limit guide rod 262, and a compensation limit bumper 263 fixed to the repulsion mechanism housing and a bumper driving connecting rod 264. They are described below respectively.

[0070] In this embodiment, the wheel rod component 261 includes: a wheel portion 261A, which is connected to the inner upper surface of the first cylindrical space C1 through a horizontal rotation pin T1; and a rotating rod portion 261B, which extends from the outer upper portion of the wheel portion toward the radial outer side of the first cylindrical space. The compensation limit guide rod 262 is pivotally connected to the tail of the rotating rod portion through a horizontal rotation axis T2, and its outer diameter is D2. Under the action of its own gravity, the compensation limit guide rod 262 is freely suspended vertically from the tail of the rotating rod portion.

[0071] In this embodiment, the wheel portion 261A and the rotating rod portion 261B are of an integrated design, that is, components processed in one piece, but the present invention is not limited thereto. In other embodiments of the present invention, the wheel portion and the rotating rod portion may also be separately provided and then connected and fixed by a corresponding fixing method.

[0072] In this embodiment, the compensation limit collision block 263 is connected to the inner repulsion mechanism housing 220 through the collision block driving connecting rod 264. The compensation limit collision block 263 is annular and located below the rotating rod portion 261B, and its inner diameter is D1. The compensation limit guide rod 262 passes through the compensation limit collision block 263 downward.

[0073] In this embodiment, since the collision block driving connecting rod 264 is a rigid rod, the distance between the compensation limit collision block 263 and the repulsion mechanism housing 220 defined by it remains constant. The compensation limit collision block 263 is a complete ring, and the compensation limit guide rod 262 passes downward through the compensation limit collision block 263. In this case, the compensation limit guide rod 262 defines the motion trajectory of the compensation limit collision block 263, thereby defining the rotation range of the rotating rod component 261.

[0074] In order to ensure that the compensation limit guide rod 262 limits and guides the compensation limit bump 263, and the compensation limit guide rod 262 can move freely up and down in the ring defined by the compensation limit bump 263, therefore, in this embodiment, (D1-D2)=1mm.

[0075] Those skilled in the art should understand that D1 and D2 as described above can be set as needed in actual scenarios, and as long as 0.5 mm ≤ (D1 - D2) ≤ 10 mm, the present invention can be at least partially implemented and is within the protection scope of the present invention.

[0076] In this embodiment, in the open state, the rotating rod component 261 is not subjected to force and is in a "lifting state", the rotating rod portion 261B and the compensation limit guide rod 262 naturally droop due to their own gravity, the repulsion disk 231 is located at a low position in the second cylindrical space C2, and the repulsion mechanism housing 220 is located at a low position in the first cylindrical space C1. Figure 1 When the switch is switched from the open state to the closed state, the repulsion mechanism 250 drives the repulsion disk 231 to move upward, and when the moving contact of the circuit breaker and the static contact are close to collision, the repulsion disk 231 hits the upper surface of the second cylindrical space, and transfers part of the kinetic energy to the repulsion mechanism housing 220.

[0077] (1) Reduce bounce

[0078] The speed of the repulsion disk 231 and the moving contact 122 decreases to achieve no closing bounce when the circuit breaker is closed, thereby ensuring the closing effect of the circuit breaker and reducing contact burning.

[0079] (2) High-speed opening

[0080] In this embodiment, the holding mechanism 250 is connected downwardly to the first moving rod 232; and upwardly to the moving contact 122 of the arc extinguishing mechanism through the insulating pull rod 201. The moving contact 122 is rigidly connected to the insulating pull rod, the insulating pull rod is rigidly connected to the holding structure, and the holding mechanism 250 is fixed on the base and rigidly connected to the repulsion disk 231 through the first connecting rod 232. Therefore, the repulsion disk 231 and the moving contact 122 are completely rigidly connected.

[0081] After being hit by the repulsion disk, the repulsion mechanism housing 220 also moves upward, driving the compensation limit collision block 263 to move upward along the direction defined by the compensation limit guide rod 262, and hitting the tail of the rotating rod part 261B, causing the rotating rod part 261B to drive the rotating wheel part 261A to rotate along the rotating pin T1, and the rotating rod part 261 presents a "lower head state", and the outer contour of the rotating wheel part resists the upward moving repulsion mechanism housing 220, and the repulsion mechanism housing 220 is rigidly connected to the lower surface of the first cylindrical space, so as to ensure that when the gate is opened, the repulsion mechanism housing 220 maintains a stable state at the moment of action, and all repulsion forces act on the repulsion disk 231 to achieve high-speed gate opening. Figure 2 shown.

[0082] In this embodiment, in the closed state, the rotating rod component 261 is in a "lower head state", the compensation limit guide rod 262 is also in a high position, the repulsion disk 231 is located at a high position in the second cylindrical space, and the repulsion mechanism housing 220 is located at a high position in the first cylindrical space C1. Figure 2 As shown. When switching from the closed state to the open state, the repulsion mechanism 240 drives the repulsion disk 231 to move downward, and the repulsion mechanism housing 220 also moves downward without the support of the repulsion disk 231, and the rotating wheel part 261A rotates counterclockwise under the gravity pull of the rotating rod part 261B and the compensation limit guide rod 262 because there is no friction force of the repulsion mechanism housing. As a result, the repulsion disk 231 is in the low position of the second cylindrical space C2, the repulsion mechanism housing 220 is in the low position of the first cylindrical space C1, and the rotating rod part 261 is in a "head-up state". The holding mechanism 250 maintains the current state of the repulsion mechanism housing 220 and the repulsion disk 231.

[0083] Figure 3 for Figure 1 The schematic diagram of the adaptive compensation of the compensation limit assembly in the case of wear of the moving contact in the circuit breaker is shown. Figure 1 , Figure 2 , Figure 3 In this embodiment, the wheel portion 261A is fixed on the inner lower surface of the first cylindrical space, with a rotating pin T1 in the middle, and the rotating rod portion 261B rotates with the rotating center position. The rear end of the rotating rod portion 261B is provided with a compensation limit guide rod 262, which can rotate following the rear fixed pin T2, and the outer side of the compensation limit guide rod 262 is provided with a compensation limit bumper 263, which can slide up and down along the compensation limit guide rod 262, and the compensation limit bumper 263 is fixedly connected to the repulsion mechanism housing 220 through the bumper drive connecting rod 264.

[0084] In the prior art, for a circuit breaker with an overtravel spring, the fastest opening time must reach 1ms or more due to the effect of the overtravel spring. For a circuit breaker without an overtravel spring, the opening time can be improved, but when the size of the contact is reduced due to mechanical wear and arc burning, the circuit breaker cannot be closed or the contact pressure cannot be guaranteed after closing. In this embodiment, when the size of the moving contact is reduced due to mechanical wear and arc burning, the compensation limit device 260 can also achieve the stability of the overall mechanism and achieve the effect of the overtravel spring.

[0085] Figure 4 for Figure 1 An enlarged view of the interaction between the compensation limit assembly and the repulsion mechanism housing in the circuit breaker is shown. Figure 5 for Figure 1 The enlarged view of the interaction between the compensation limit assembly and the repulsion mechanism housing in the circuit breaker when the moving contact is partially worn. Figure 4In order to indicate the position of the curve S, the line corresponding to the position of the part is thickened. The point of action corresponding to the friction force F3 is the point where the wheel portion 261A contacts the repulsion mechanism housing 220. In order to avoid coinciding with the edge line of the repulsion mechanism housing, the action line of the friction force F3 is slightly moved downward.

[0086] like Figure 4 and Figure 5 As shown, in the compensation limit assembly, the rotation range of the wheel portion 261A is restricted by two aspects:

[0087] (1) The inner lower surface of the first cylindrical space at the top

[0088] Under the definition of the inner lower surface of the first cylindrical space C1, the rotation range of the wheel portion 261A is limited to the lower half of the inner lower surface.

[0089] (2) Annular compensation limit block

[0090] The compensation limit bumper 263 is fixed to the outside of the repulsion mechanism housing 220. The compensation limit guide rod 262 is sleeved in the annular compensation limit bumper, and can only move in the vertical direction at a fixed distance from the outer side of the repulsion mechanism housing 220. The compensation limit guide rod 262 is pivotally connected to the rotating wheel component 261. Therefore, to a certain extent, the compensation limit bumper will also affect the rotation range of the rotating wheel part 261A.

[0091] Based on the above two limiting effects, the rotation range of the wheel portion 261A is limited to a range below 60° in the lower left portion.

[0092] Please refer to Figure 4 and Figure 5 Within the rotation range of the rotating wheel portion, the continuous positions that can abut against the outer upper surface of the repulsion mechanism housing constitute a curve S.

[0093] Those skilled in the art should understand that if the curve S is a positive circular arc, the distance between the outer upper surface of the repulsive structure shell and the inner lower surface of the first cylindrical space defined by the curve S will remain unchanged. In the present invention, the curve S is designed as a variable diameter curve, so that the distance between the outer upper surface of the repulsive structure shell and the inner lower surface of the first cylindrical space can be changed, thereby adaptively compensating for the electrical wear of the moving contact.

[0094] (1) First point P1

[0095] The end point of the curve S away from the rotating rod portion is the first point P1. When the first point abuts against the repulsion mechanism housing, the vertical distance between the repulsion mechanism housing and the inner upper surface of the first cylindrical space is H1.

[0096] (2) Second site P2

[0097] The end point of the curve S close to the rotating rod is the second point P2. When the second point abuts against the repulsion mechanism housing, the vertical distance between the repulsion mechanism housing and the inner upper surface of the first cylindrical space is H2;

[0098] (3) Compensation distance (H1-H2)

[0099] In this embodiment, the compensation distance (H1-H2)=5mm. However, the present invention is not limited thereto. In other embodiments of the present invention, 0.5mm≤(H1-H2)≤10mm. Preferably, 3mm≤(H1-H2)≤6mm. The above ranges can also implement the present invention and are within the protection scope of the present invention.

[0100] (4) Curve S

[0101] In the curve S, there is a smooth transition between the first point P1 and the second point P2. During the upward movement of the repulsion mechanism housing:

[0102] The force applied to the wheel portion 261A is described in detail below. Figure 4 and Figure 5 In the closed state, due to the action of the repulsion mechanism 240 and the retaining mechanism 250, the repulsion mechanism housing 220 applies an upward pressure F1 to the wheel portion 261A. The inner upper surface of the first cylindrical space is fixed, and there will be a reaction force F2. Both forces act on the axis to stabilize the compensation mechanism. At the same time, because the wheel portion 261A tends to rotate counterclockwise (towards the direction of decreasing center distance), there is a friction force F3 that prevents the wheel portion 261A from rotating. The three forces work together to stabilize the wheel portion 261A, so that the compensation limit mechanism remains in a stable state when the switch is closed.

[0103] The following is an explanation of the working principle of the compensation limit assembly. For ease of understanding, it is divided into three cases:

[0104] ① If the moving contact is not worn or burned, when the circuit breaker switches from opening to closing, the housing of the repulsion mechanism abuts against the first point P1 of the curve S, as shown in Figure 4 shown.

[0105] ② If the moving contact is reduced in length (H1-H2) due to wear, ablation or other reasons, when the circuit breaker switches from opening to closing, the repulsion mechanism housing abuts against the second point P2 of the curve S. Thus, the increase in the upward movement of the repulsion mechanism housing compensates for the loss of the moving contact, such as Figure 5 shown.

[0106] ③ If the length of the moving contact is reduced due to wear, ablation or other reasons, but has not reached (H1-H2), then when the circuit breaker mechanism switches from opening to closing, the housing of the repulsion mechanism abuts against a point between the first position P1 and the second position P2 of the curve S, thereby realizing automatic compensation for the reduction in the length of the moving contact.

[0107] In summary, the beneficial effects of the circuit breaker mechanism of the present invention are summarized as follows:

[0108] (1) Rigid connection resulting in short tripping time

[0109] The moving contact is rigidly connected to the insulating pull rod, the insulating pull rod is rigidly connected to the holding structure, and the holding mechanism is fixed on the base and rigidly connected to the repulsion disk through the first connecting rod. It can be seen that the driving disk and the vacuum bubble moving contact are all rigidly connected, and there are no elastic elements such as overtravel springs. When the driving disk moves, it directly drives the moving contact to open the gate. The movement is just opening, which is greatly shortened compared to the just opening time of ordinary circuit breakers. The just opening time can be increased to less than 0.5ms, breaking through the bottleneck of 1ms opening of mechanical circuit breakers, and has a good prospect of use in special occasions.

[0110] (2) The repulsion mechanism housing can move up and down to reduce bouncing

[0111] The repulsion mechanism housing is designed to move up and down. When the repulsion disk moves upward, part of the upward kinetic energy of the repulsion disk is absorbed by the repulsion mechanism housing, thereby reducing the speed at which the moving contact closes the static contact and reduces bounce.

[0112] (3) The compensation limit mechanism solves the compensation problem after contact wear

[0113] The rotating rod component is a rotatable device. When the repulsion mechanism is opened, the limit compensation device is reset under the action of gravity. When closing the switch, the shell of the repulsion mechanism pushes the limit compensation device to the required position. Through the structure and appearance design of the limit compensation device, the overall displacement of the repulsion mechanism when closing the switch is 0-5mm and fully rigid contact is achieved.

[0114] When the contacts are worn or ablated due to long-term use, the repulsion disk will compensate for the wear or ablation size as a whole, maintain the reserved stroke of the mechanism, and compensate for the movement of the limit force point at the same time, ensuring the contact pressure after the contact size is reduced due to mechanical wear and arc burning, and maintaining the overall stability of the circuit breaker.

[0115] Based on the above circuit breaker, the second aspect of the present invention provides a circuit breaker mechanism. The circuit breaker mechanism has been described in detail in the above circuit breaker embodiment, but it is emphasized again that the circuit breaker mechanism can be independently manufactured, sold, promised for sale, imported, etc. Therefore, the circuit breaker mechanism that does not include an arc extinguishing mechanism is also within the protection scope of the present invention.

[0116] At this point, the various embodiments of the present invention have been introduced. According to the above description, those skilled in the art should have a clear understanding of the present invention.

[0117] In summary, the present invention provides a rotating resonant three-dimensional electric field sensor that can be manufactured using micromachining technology and can achieve three-dimensional measurement of electric fields. Even if the direction of the electric field strength to be measured is not perpendicular to the sensor surface, the rotating resonant three-dimensional sensor of the present invention can achieve accurate measurement of the electric field strength to be measured, and can be widely used in many fields such as meteorology, smart grid, resource detection, etc.

[0118] It should be noted that, unless explicitly indicated to the contrary, the numerical parameters in the specification and claims of the present invention may be approximate values ​​and may be changed according to the content of the present invention. Specifically, all the numbers indicating the content of the composition, reaction conditions, etc. recorded in the specification and claims should be understood to be modified by the term "about" in all cases, and the meaning of the expression is to include a change of ±10% from a specific number in some embodiments.

[0119] The ordinal numbers used in the specification and claims, such as "first", "second", as well as Arabic numerals, letters, etc., to modify the corresponding elements are intended only to clearly distinguish an element with a certain name from another element with the same name, and do not mean that the element has any ordinal number, nor do they represent the order of one element and another element.

[0120] It should also be noted that the directional terms mentioned in the embodiments, such as "center", "lateral", "longitudinal", "top", "bottom", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicate positions or positional relationships based only on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Moreover, throughout the drawings, the same elements are represented by the same or similar reference numerals. Moreover, the shapes and sizes of the components in the drawings do not reflect the actual size and proportion, but only illustrate the contents of the embodiments of the present invention.

[0121] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0122] Those skilled in the art should understand that in the claims and description of the present invention, the word "comprising" does not exclude the existence of elements (or steps) not listed in the claims. The word "a" or "an" preceding an element (or step) does not exclude the existence of multiple such elements (or steps).

[0123] For certain implementations, if they are not the key content of the present invention and are well known to ordinary technicians in the relevant technical field, they are not described in detail in the drawings or text of the specification due to space limitations. In this case, reference can be made to relevant existing technologies for understanding.

[0124] Furthermore, the above embodiments are provided solely to enable the present invention to satisfy legal requirements, and the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

[0125] Similarly, it should be understood that in order to simplify the present invention, in the above description of the exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the invention should not be interpreted as reflecting the following intention: the claimed invention requires more features than the features explicitly stated in each claim. More specifically, as reflected in the claims, each inventive aspect lies in less than all the features of the previous single embodiment. Moreover, the embodiments can be mixed and matched with each other or with other embodiments based on design and reliability considerations, that is, the technical features in different embodiments can be freely combined to form more embodiments. Therefore, the claims following the specific embodiment are hereby explicitly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present invention.

[0126] The above specific embodiments provide a detailed description of the objectives, technical means and beneficial effects of the present invention. It should be understood that the purpose of the detailed description is to enable those skilled in the art to understand the present invention more clearly, and it is not used to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A circuit breaker mechanism, characterized in that: include: A base, the interior of which forms a first cylindrical space with its axis along the vertical direction; A repulsion mechanism housing is disposed in the first cylindrical space, and the interior of the housing forms a second cylindrical space with its axis in the vertical direction; The action mechanism comprises: a repulsion disk horizontally arranged in the second cylindrical space, and a first movement rod extending upward from the center of the repulsion disk and passing through the repulsion mechanism housing and the base; A repulsion mechanism, used for driving the action mechanism to move up and down; The repulsion mechanism housing can move up and down in the first cylindrical space; driven by the repulsion mechanism, the repulsion disk can move from bottom to top in the second cylindrical space, and after hitting the repulsion mechanism housing, it drives the repulsion mechanism housing to move upward, and the movement speed of the repulsion disk itself is reduced; Wherein, in the closed state, the repulsion disk is located at a high position in the second cylindrical space, and the repulsion mechanism housing is located at a high position in the first cylindrical space; in the open state, the repulsion disk is located at a low position in the second cylindrical space, and the repulsion mechanism housing is located at a low position in the first cylindrical space; Among them, when switching from the open state to the closed state, the repulsion mechanism drives the repulsion disk to move upward from the low position in the second cylindrical space; after the repulsion disk moves to the high position in the second space, it hits the inner upper surface of the second cylindrical space, pushing the repulsion mechanism shell upward to the high position in the first cylindrical space.

2. The circuit breaker mechanism according to claim 1, characterized in that: When switching from the closed state to the open state, the repulsion disk falls from a high position in the second cylindrical space to a low position; and the repulsion mechanism housing falls from a high position in the first cylindrical space to a low position.

3. The circuit breaker mechanism according to claim 2, characterized in that: Also includes: N compensation limit components, N ≥ 1; The compensation limit assembly comprises: The wheel rod component comprises: a wheel portion connected upward to the inner upper surface of the first cylindrical space through a horizontal rotation pin; and a rotating rod portion extending from the outer upper portion of the wheel portion toward the radial outer side of the first cylindrical space. A compensation limit collision block is fixed to the outer side of the repulsion mechanism housing and below the rotating rod portion; Among them, when there is no force, the rotating rod part of the wheel rod component droops naturally; when the repulsion mechanism shell moves upward, it drives the compensating limit block to hit the rotating rod part, prompting it to drive the rotating wheel part to rotate, so that the outer contour of the rotating wheel part resists the upward moving repulsion mechanism shell.

4. The circuit breaker mechanism according to claim 3, characterized in that: Also includes: A holding mechanism, used to maintain the closing state and the opening state of the circuit breaker mechanism, which is downwardly connected to the first moving rod and upwardly connected to the moving contact of the arc extinguishing mechanism through an insulating pull rod; The moving contact is rigidly connected to the insulating pull rod, the insulating pull rod is rigidly connected to the retaining structure, and the retaining structure is fixed on the base and rigidly connected to the repulsion disk through the first connecting rod.

5. The circuit breaker mechanism according to claim 3, characterized in that: The continuous points on the outer contour of the wheel part that can abut against the outer upper surface of the repulsion mechanism housing within the rotation range of the wheel part constitute a curve S; The end point of the curve S away from the rotating rod portion is the first point; when the first point abuts against the repulsion mechanism housing, the vertical distance between the repulsion mechanism housing and the inner upper surface of the first cylindrical space is H1; The end point of the curve S close to the rotating rod portion is the second position point; when the second position point abuts against the repulsion mechanism housing, the vertical distance between the repulsion mechanism housing and the inner upper surface of the first cylindrical space is H2; Among them, 0.5mm≤(H1-H2)≤10mm, and in the curve S, there is a smooth transition between the first point and the second point.

6. The circuit breaker mechanism according to claim 3, characterized in that: The compensating limit block is in the form of a complete or partial ring, and its inner diameter is D1; The compensation limiter assembly further includes: a compensation limiter guide rod, pivotally connected to the tail of the rotating rod portion, passing through the compensation limiter bumper downward, and having an outer diameter of D2; Among them, 0.5mm≤(D1-D2)≤10mm.

7. The circuit breaker mechanism according to claim 3, characterized in that: The compensating limit bumper is connected to the inner repulsion mechanism housing via a bumper driving connecting rod; and / or In the wheel-rod component, the rotating wheel part and the rotating rod part are integrally arranged or separately arranged; and / or N≥2, and N limit compensation components are evenly arranged in the circumferential direction of the upper surface of the first cylindrical space.

8. The circuit breaker mechanism according to any one of claims 1 to 7, characterized in that: The repulsion disk is entirely or partially made of magnetic metal material; The action mechanism further includes: a second motion rod extending downward from the center of the repulsion disk; The repulsion mechanism includes: a first repulsion coil disposed on the inner upper surface of the second cylindrical space and outside the first movement rod; and / or a second repulsion coil disposed on the inner lower surface of the second cylindrical space.

9. A circuit breaker, characterized in that: include: The arc extinguishing mechanism comprises: a vacuum bubble; a static contact and a moving contact, which are arranged in the vacuum bubble; The circuit breaker mechanism according to any one of claims 1 to 8 is arranged at the lower part of the arc extinguishing mechanism, and the first moving rod is connected to the moving contact of the arc extinguishing mechanism upward through a retaining mechanism and an insulating pull rod in sequence.

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