A breaking device

Abstract

The present invention relates to a disconnecting device, comprising a movably arranged handle, a locking portion being fixedly arranged on the handle in a convex manner, and an intelligent lock, the intelligent lock comprising a positive and negative connection detection unit, a telescopic drive control unit and an interception member, the positive and negative connection detection unit is used to detect whether the input and output terminals of the disconnecting device are reversely connected and output a feedback signal, the telescopic drive control unit is used to drive the interception member to extend or retract toward the handle according to the feedback signal, and the interception member is used to lock the locking portion, thereby at least limiting the closing stroke of the handle. The present invention realizes the anti-reverse connection function of the disconnecting device by arranging an interception member that can judge the positive and negative connection of the disconnecting device and then intelligently control the telescopic interception member to intercept the closing stroke of the handle.

Description

Technical Field

[0001] The invention relates to the field of disconnecting devices, and in particular to a disconnecting device with a reverse connection protection function. Background Art

[0002] When installing a circuit breaker, especially when the circuit breaker is used in a DC circuit, it is possible that the input and output lines of the circuit breaker are connected in reverse due to unclear markings at the connection point or human error. In addition to the safety hazard, the reverse connection of the input and output lines may also reduce the breaking capacity of the circuit breaker, which may eventually lead to consequences such as line burnout or even circuit breaker explosion. In addition, in the AC circuit, the interlocking closing also requires the phase angle, frequency and amplitude to be consistent, and reverse connection is also not allowed. However, most circuit breakers on the market currently do not have the function of preventing reverse connection. Summary of the invention

[0003] Therefore, in view of the above problem, the present invention proposes a disconnecting device with a reverse connection protection function.

[0004] The present invention is implemented by the following technical solutions:

[0005] The present invention proposes a disconnecting device, comprising a movably arranged handle, the handle having a closing stroke and an opening stroke for realizing the switching on and off of the disconnecting device, the handle being fixedly provided with a locking portion in a raised manner, and also comprising an intelligent lock, the intelligent lock comprising a positive and negative connection detection unit, a telescopic drive control unit and an intercepting member, the positive and negative connection detection unit being used to detect whether the input and output terminals of the disconnecting device are reversely connected and output a feedback signal, the telescopic drive control unit being used to drive the intercepting member to extend or retract toward the handle according to the feedback signal, and the intercepting member being used to lock the locking portion, thereby at least limiting the handle from performing its closing stroke.

[0006] Among them, in order to ensure the safety of electricity use when the power is off or the disconnecting device is replaced, the intercepting member is always in a position extending toward the handle. At the same time, when the feedback signal is a positive connection state signal, the telescopic drive control unit drives the intercepting member to be in a position retracted toward the handle, so that the disconnecting device can be opened and closed normally in the positive connection state, thereby realizing intelligent control.

[0007] Specifically, the telescopic drive control unit includes an elastic top stretching member, which uses its elastic force to continuously stretch the intercepting member in a direction extending toward the handle, so that after the intercepting member is retracted by a driving action other than the telescopic drive control unit, the elastic top stretching member can make the intercepting member rebound and reset, so as to ensure that the intercepting member is always in a position extending toward the handle.

[0008] Wherein, the telescopic drive control unit further comprises a retraction actuator, and the retraction actuator is used to overcome the elastic force of the elastic tensioning member to drive the intercepting member to be in a position retracted toward the handle.

[0009] As a preferred implementation means, the telescopic drive control unit is a self-resetting flux converter, the elastic top member is a compression spring continuously acting on the intercepting member, the retraction actuator includes a static iron core, a coil, and a moving iron core fixedly connected to the intercepting member, and when the feedback signal is a positive state signal, the telescopic drive control unit energizes the coil to generate electromagnetic force, thereby attracting the moving iron core and the intercepting member to retract.

[0010] In order to manually force closing the switch in special circumstances, a toggle portion is fixedly connected to the intercepting member, so that force can be manually applied to the toggle portion to drive the intercepting member to a position retracted toward the handle, thereby forcing the handle to perform its closing stroke.

[0011] Specifically, based on manufacturing and installation considerations, the toggle portion is an L-shaped raised sheet structure.

[0012] In order to further improve the safety of electricity use, the disconnecting device also includes an outer shell that encloses the smart lock, and the outer shell is only provided with an openable cover at a position corresponding to the toggle portion.

[0013] In order to retain the shut-off capability and enable the operator to open the switch under any circumstances, the locking is a one-way locking, that is, it is only used to limit the closing stroke of the handle, but not to limit the opening stroke of the handle.

[0014] Specifically, the end of the intercepting member facing the handle is roughly in the shape of an inclined lock tongue, including an inclined guide surface facing the closing position of the handle and gradually approaching the handle. When the handle performs its opening stroke from its closing position, the locking portion can abut and cooperate with the inclined guide surface. The locking portion slides on the inclined guide surface to press the intercepting member so that the intercepting member is retracted to achieve the opening stroke. After the locking portion passes over the inclined guide surface, the intercepting member rebounds and resets under the action of the elastic tensioning member to limit the handle from performing its closing stroke.

[0015] Among them, in order to reduce wear and prevent jamming, the locking part includes a supporting seat, a rotating shaft and a roller. The supporting seat is fixedly connected to the handle, the rotating shaft is passed through and fixed to the supporting seat, and the roller is mounted on the rotating shaft, so that the roller is rotatably connected to the supporting seat, and the roller can rollably abut against the inclined guide surface, thereby realizing the compression of the intercepting member to retract the intercepting member.

[0016] As a conventional application, the disconnecting device is a circuit breaker. In particular, in most applications, the disconnecting device is preferably a DC circuit breaker.

[0017] The present invention has the following beneficial effects: the present invention realizes the anti-reverse connection function of the disconnecting device by setting an intercepting member that can judge the positive and negative connection of the disconnecting device and then intelligently control the extension to intercept the closing stroke of the handle. It ensures the safety of electricity use and eliminates potential safety hazards. It has a simple structure. The locking part and the intelligent lock can be separated from the disconnecting device body. It can be quickly installed on the disconnecting device when in use, and has a wide range of applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a circuit breaker in an embodiment;

[0019] Figure 2 is an exploded schematic diagram of a locking portion of a circuit breaker in an embodiment;

[0020] Figure 3 Schematic diagram of the telescopic drive control unit and the positive and negative connection detection unit intelligently controlling the telescopic interception mandrel in the embodiment;

[0021] Figure 4 It is a three-dimensional schematic diagram showing that the handle of the circuit breaker is in the open position and the interception push rod extends out of the interception locking part;

[0022] Figure 5 This is a front view of the circuit breaker handle in the open position, with the interception push rod extending out of the interception locking part;

[0023] Figure 6 It is a side view of the circuit breaker handle in the open position, with the interception push rod extending out of the interception locking part;

[0024] Figure 7 It is a top view of the circuit breaker handle in the open position, with the interception push rod extending out of the interception locking part;

[0025] Figure 8 yes Figure 5 Cross-sectional view of the middle BB;

[0026] Fig. 9 It is a three-dimensional schematic diagram of the circuit breaker handle in the open position and the interception push rod retracted;

[0027] Fig.10 This is a front view of the circuit breaker handle in the open position with the interception rod retracted;

[0028] Fig.11 It is a side view of the circuit breaker handle in the open position with the intercepting rod retracted;

[0029] Fig.12It is a top view of the circuit breaker handle in the open position with the interception rod retracted;

[0030] Fig.13 This is a front view of the circuit breaker handle in the closed position with the interception rod extended;

[0031] Fig.14 It is a side view of the circuit breaker handle in the closed position with the interception rod extended;

[0032] Fig.15 It is a top view of the circuit breaker handle in the closed position with the interception rod extended;

[0033] Fig.16 It is a schematic diagram of a pick fixedly connected to an intercepting top rod. DETAILED DESCRIPTION

[0034] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0035] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0036] See also Figure 1 As shown, as a preferred embodiment of the present invention, a circuit breaker with an anti-reverse connection function is provided, wherein the circuit breaker body 1 has a handle 11, and the handle 11 is swingably connected to the housing base of the circuit breaker body 1, so it has a swing stroke. The handle 11 is a part of the circuit breaker operating mechanism. By toggling the handle 11, the operating mechanism is linked to the contact system inside the circuit breaker body 1, and the swing stroke of the handle 11 can be manually converted into the conduction and shutdown of the circuit breaker, wherein the stroke of the handle 11 to realize the conduction of the circuit breaker is the closing stroke, and the stroke of the handle 11 to realize the shutdown of the circuit breaker is the opening stroke.

[0037] A locking portion 2 is fixedly provided on the side of the handle 11, Figure 2 The locking portion 2 includes a support seat 21, a rotating shaft 22 and a roller 23. The support seat 21 is a U-shaped structure. The support seat 21 is fixedly connected to the handle 11 (fixed connection means such as riveting, screwing, welding, etc.), the rotating shaft 22 is passed through and fixed to the support seat 21, and the roller 23 is mounted on the rotating shaft 22, so that the roller 23 is rotatably connected to the support seat 21.

[0038] The smart lock 3 is fixedly arranged on the outside of the circuit breaker body 1 (for example, the smart lock 3 and the circuit breaker body 1 are fixedly connected through an intermediate piece; or the smart lock 3 is fixedly arranged in the external environment of the circuit breaker body 1, such as fixing the smart lock 3 in the distribution box so that it faces the circuit breaker body 1), and the smart lock 3 includes an intercepting push rod 31 facing the handle 11 (as an intercepting piece cooperating with the locking part 2 to achieve locking), and the intercepting push rod 31 is retractable so that it can be relatively close to or away from the handle 11. When the intercepting push rod 31 is in a position extending toward the handle 11, it can block the locking part 2 to at least limit the handle 11 from performing its closing stroke, thereby protecting the safety of electricity use.

[0039] The extension and retraction of the interception top rod 31 is intelligently controlled by the smart lock 3, so that when the circuit breaker is connected in the forward direction, the interception top rod 31 retracts without affecting the normal opening and closing. When the circuit breaker is connected in the reverse direction, the interception top rod 31 extends to at least prevent the circuit breaker from closing (in other embodiments, it can also be changed to a structure with the function of preventing the circuit breaker from opening and closing at the same time, which will be described in detail below). Figure 3 , wherein the smart lock 3 also includes a telescopic drive control unit and a positive and negative connection detection unit, the positive and negative connection detection unit is used to detect whether the inlet and outlet terminals of the circuit breaker are connected in reverse, and output a feedback signal to the telescopic drive control unit, and the telescopic drive control unit controls the telescopic action of the interception top rod 31 toward the handle 11 according to the feedback signal. Specifically, in this embodiment, a magnetic flux converter with an elastic self-reset function conventionally used in the art is used as the telescopic drive control unit, and the self-reset magnetic flux converter includes a static iron core, a coil, a moving iron core and a compression spring, wherein the compression spring continuously stretches the interception top rod 31 in the direction of extending toward the handle 11 with its elastic force, and the moving iron core is fixedly connected to the interception top rod 31 as a whole. When the circuit breaker is connected in the positive direction, the positive and negative connection detection unit sends a signal, and the magnetic flux converter that receives the signal sends an electronic pulse signal to energize the electromagnetic coil, thereby generating an electromagnetic force to attract the interception top rod 31 to retract.

[0040] It can be seen that the telescopic drive control unit should at least include an elastic top member and a retraction actuator. The elastic top member is such as the compression spring in the self-resetting magnetic flux converter mentioned above, which is used to continuously stretch the top interception top rod 31 outward. In other embodiments, the compression spring can also be replaced by a spring sheet or other structures; the retraction actuator is such as the static iron core, coil and moving iron core in the self-resetting magnetic flux converter mentioned above, which is used to overcome the elastic force of the elastic top member to drive the interception top rod 31 to a position retracted toward the handle 11; in other embodiments, the retraction actuator can also be an electric push rod or other driving mechanism. The positive and negative connection detection unit can be implemented by any means in the prior art. For example, in a DC circuit, it can be implemented by a reverse polarity detection circuit as proposed in patent publication number CN102487195A. In an AC circuit, it can be implemented by a zero-live detection module as proposed in authorization announcement number CN212321817U. For those skilled in the art, the detection means of the positive and negative connection of the circuit breaker can be implemented by using many existing technologies, which will not be listed one by one here. In this embodiment, a shunt (or Hall sensor) connected to the main circuit is coupled to obtain a detection component, and the positive and negative connection detection unit performs positive and negative connection detection and judgment based on the input voltage or current detection component, and directly outputs or outputs a drive control signal of 0 or 1 via a connected single-chip microcomputer to turn on the relay (or semiconductor switch) in the self-resetting flux converter working circuit to connect or disconnect the coil in the flux converter, thereby realizing the action change of retracting or automatically extending the intercepting push rod 31.

[0041] In this embodiment, the elastic tensioning member continuously stretches the intercepting top rod 31 outward, so that the intercepting top rod 31 is always in a position extending toward the handle 11 by default, regardless of whether the circuit breaker is reversely connected or the circuit breaker is powered off (for example, the circuit breaker is replaced after power off), thereby limiting the handle 11 from performing its closing stroke to ensure power safety.

[0042] Next, the functions of the smart lock 3 are explained more intuitively with reference to the accompanying drawings. Figure 4-8 In the default state or when the circuit breaker is reversely connected, the intercepting push rod 31 extends to the side of the roller 23 to block the locking part 2 to prevent the handle 11 from swinging in the closing direction, so that the circuit breaker cannot be closed normally to protect the safety of electricity use. Figure 9-12 When the circuit breaker is connected, the interception push rod 31 of the smart lock 3 is in a retracted state, and there is a certain distance between it and the locking part 2. Its position will not hinder the swing of the handle 11, that is, the circuit breaker can be opened and closed normally.

[0043] When installing a circuit breaker, it is possible that due to limited conditions, the circuit breaker must be reversed. After reverse connection, the circuit breaker is in the following state: Figure 4-8In any state, if the circuit breaker is forced to close, the operator needs to confirm and manually retract the interception rod 31. Fig.16 In this embodiment, the interception push rod 31 is also fixedly connected with a paddle 4, which is a "Z"-shaped raised sheet structure to facilitate the operator to apply force. To further improve safety, the entire smart lock 3 can be sealed with an outer shell, and the outer shell is only provided with an openable cover at the position corresponding to the paddle. When forced closing is required, it must be completed through the two-step manual procedure of "opening the cover" and "pulling", which can not only avoid misoperation by non-professionals, but also remind the operator to pay attention to electrical safety through the manual steps.

[0044] After the interception push rod 31 is forced to retract and the circuit breaker is closed, the interception push rod 31 rebounds to the extended position under the action of the elastic tensioning member. At this time, the state of the circuit breaker is as follows: Figure 13-15 As shown, it is noted that the end of the interception push rod 31 facing the handle 11 is in the shape of an inclined lock tongue and has an inclined guide surface 311. The inclined guide surface 311 faces the closing position of the handle 11 and gradually approaches the handle 11. After the circuit breaker is reversed and closed, if the circuit breaker is to be opened, the handle 11 is pulled, and the roller 23 cooperates with the inclined guide surface 311, that is, the roller 23 can rollably abut against the inclined guide surface 311, and the roller 23 slides on the inclined guide surface 311 to convert the pressure of the roller 23 in its swinging direction into the movement of the interception push rod 31 in its telescopic direction, so that the interception push rod 31 retracts. After the roller 23 passes over the inclined guide surface 311, the interception push rod 31 rebounds and extends out under the action of the elastic tensioning member, and the locking portion 2 and the smart lock 3 return to the state as shown. Figure 4-8 That is to say, when the reverse connection is forced to close, the circuit breaker can be opened normally to retain the shutoff capacity, but if it needs to be closed again after opening, it needs to be checked again, which can only be completed through the two-step manual procedure of "opening the cover" and "swiping".

[0045] In other embodiments, the interception rod 31 can be set to completely limit the opening and closing strokes of the handle 11. For example, the front end of the interception rod is set to be in a groove shape, and the interception rod is extended to nest the locking portion 2 to completely limit the swing of the handle 11. If only the function of preventing reverse connection is to be realized, this is completely possible. However, this embodiment realizes the unidirectional locking of the circuit breaker handle 11 by setting the interception rod 31 in the shape of an inclined lock tongue, that is, only limiting the handle 11 from performing its closing stroke, but not limiting the handle 11 from performing its opening stroke, so as to retain the shutoff capability. In an emergency, the operator can also quickly open the circuit breaker to ensure circuit safety.

[0046] In this embodiment, the roller 23 is used to abut against the inclined guide surface 311 to reduce friction between the two, reduce wear, and prevent jamming. Of course, the roller 23 is only a preferred solution. In order to realize the function of intercepting the retraction of the top rod 31, the locking part 2 only needs to have a matching surface (or even a matching edge) that abuts against the inclined guide surface 311. In this embodiment, the support seat 21 and the rotating shaft 22 are set, which only serve as the connecting base of the roller 23 to provide an installation position for installing the roller 23. In other embodiments, the roller 23 (or the locking part 2) can be replaced by other interference structures, which only need to form a raised locking part on the handle 11, but the relative sliding surface between the locking part and the inclined guide surface 311 should be as smooth as possible, which is obvious. Through the cooperation between the locking part and the intercepting push rod 31, the movement of the handle 11 in the closing direction is blocked by the intercepting push rod 31, and the one-way movement of the handle 11 in the opening direction is realized by relying on its cooperation with the inclined guide surface 311. For example, the locking part 2 is replaced by a cylinder fixedly protruding on the handle 11.

[0047] This embodiment takes the circuit breaker as an example to illustrate the anti-reverse connection mechanism formed by the locking part 2 and the smart lock 3. Obviously, the locking part 2 and the smart lock 3 can also be used in other disconnecting devices to achieve the anti-reverse connection function, such as in an isolating switch.

[0048] The structure of this embodiment is simple, and the locking portion 2 and the smart lock 3 are structures separated from the circuit breaker body 1, and can be quickly installed on the circuit breaker body 1 when needed.

[0049] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims will fall within the scope of protection of the present invention.

Claims

1. A disconnecting device, comprising a movably arranged handle, the handle having a closing stroke and an opening stroke for realizing the switching on and off of the disconnecting device, characterized in that: The handle is fixedly provided with a locking portion in a raised manner, and also includes a smart lock. The smart lock includes a positive and negative connection detection unit, a telescopic drive control unit and an intercepting member. The positive and negative connection detection unit is used to detect whether the input and output terminals of the disconnecting device are reversely connected and output a feedback signal. The telescopic drive control unit is used to drive the intercepting member to extend or retract toward the handle according to the feedback signal. The intercepting member is used to lock the locking portion, thereby at least limiting the closing stroke of the handle.

2. The breaking device according to claim 1, characterized in that: The intercepting member is always in a position extending toward the handle, and when the feedback signal is a positive state signal, the telescopic drive control unit drives the intercepting member to be in a position retracted toward the handle.

3. The breaking device according to claim 2, characterized in that: The telescopic drive control unit includes an elastic top stretching member, which uses its elastic force to continuously stretch the intercepting member in a direction extending toward the handle, so that after the intercepting member is retracted by a driving action other than the telescopic drive control unit, the elastic top stretching member can make the intercepting member rebound and reset, so that the intercepting member is always in a position extending toward the handle.

4. The breaking device according to claim 3, characterized in that: The telescopic drive control unit further comprises a retraction actuator, which is used to overcome the elastic force of the elastic tensioning member to drive the intercepting member to a position retracted toward the handle.

5. The breaking device according to claim 4, characterized in that: The telescopic drive control unit is a self-resetting flux converter, the elastic top member is a compression spring continuously acting on the intercepting member, the retraction actuator includes a static iron core, a coil and a moving iron core fixedly connected to the intercepting member, and when the feedback signal is a positive state signal, the telescopic drive control unit energizes the coil to generate electromagnetic force, thereby attracting the moving iron core and the intercepting member to retract.

6. The breaking device according to claim 3, characterized in that: The intercepting member is fixedly connected with a toggle portion, so that the intercepting member can be driven to a position retracted toward the handle by manually applying force on the toggle portion, thereby forcing the handle to perform its closing stroke.

7. The breaking device according to claim 6, characterized in that: The toggle portion is a Z-shaped sheet structure.

8. The breaking device according to claim 6, characterized in that: It also includes an outer shell that encloses the smart lock, and the outer shell is only provided with an openable cover at a position corresponding to the toggle portion.

9. The breaking device according to claim 1, characterized in that: The locking is a one-way locking, that is, it is only used to limit the closing stroke of the handle, but not to limit the opening stroke of the handle.

10. The disconnecting device according to claim 9, characterized in that: The telescopic drive control unit includes an elastic top stretching member, which uses its elastic force to continuously stretch the intercepting member in the direction of extending toward the handle, so that after the intercepting member is retracted by a driving action other than the telescopic drive control unit, the elastic top stretching member can make the intercepting member rebound and reset to a position extending toward the handle. The end of the intercepting member facing the handle is roughly in the shape of an inclined lock tongue, including an inclined guide surface facing the closing position of the handle and gradually approaching the handle. When the handle performs its opening stroke from its closing position, the locking portion can abut and cooperate on the inclined guide surface. The intercepting member is pressed by the sliding of the locking portion on the inclined guide surface to retract the intercepting member to achieve the opening stroke. After the locking portion passes over the inclined guide surface, the intercepting member rebounds and resets under the action of the elastic top stretching member to limit the handle from performing its closing stroke.

11. The disconnecting device according to claim 10, characterized in that: The locking portion includes a supporting seat, a rotating shaft and a roller. The supporting seat is fixedly connected to the handle, the rotating shaft is passed through and fixed to the supporting seat, and the roller is sleeved on the rotating shaft, so that the roller is rotatably connected to the supporting seat, and the roller can rollably abut against the inclined guide surface, thereby achieving the compression of the intercepting member to retract the intercepting member.

12. The disconnecting device according to any one of claims 1 to 11, characterized in that: The disconnecting device is a circuit breaker.

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