CN219105947U - Switch device and electrical cabinet - Google Patents

Abstract

The utility model relates to a switching device (1), characterized in that it comprises: a frame (2); the main contact group comprises a main fixed contact (11) and a driving contact (12); the pre-charging contact group comprises a pre-charging fixed contact (13) and a pre-charging movable contact (14); an operating mechanism (3) comprising an actuating disc (31) for actuating the active contact (12) and a priming actuating device (32) for actuating the priming contact (14); and a locking unit (4) for locking and unlocking the operating mechanism (3), wherein, during the closing process of the switching device (1), the locking unit (4) locks the operating mechanism (3) after the pre-charging moving contact (14) and the pre-charging fixed contact (13) are closed and before the driving contact (12) and the main fixed contact (11) are closed; in the process of opening the switch device (1), the locking unit (4) locks the operating mechanism (3) after the pre-charging moving contact (14) is disconnected with the pre-charging fixed contact (13) and before the driving contact (12) is disconnected with the main fixed contact (11). The utility model also relates to an electrical cabinet.

Description

Switch device and electrical cabinet

Technical Field

The utility model relates to a switching device and an electrical cabinet with the switching device.

Background

With the vigorous development of new energy industries, research on electrochemical energy storage schemes is receiving more and more attention. In almost all known electrical cabinet solutions electrical components such as disconnectors, contactors and fuses are provided, which are mounted in the electrical cabinet by means of electrical coupling. The known isolating switch generally comprises a breaking unit, an operating mechanism and a release, wherein the breaking unit comprises a moving contact and a fixed contact, and the moving contact is driven to move relative to the fixed contact through the operating mechanism, so that the isolating switch is switched between a closing position where the moving contact is closed with the fixed contact and a breaking position where the moving contact is opened with the fixed contact. The contactor, for example a dc contactor, has a contactor coil, a main contact group and an auxiliary contact group, wherein the main contact group and the auxiliary contact group are linked when the contactor coil is energized.

However, this electrical cabinet solution has significant drawbacks: the number of electrical junction contact points between electrical components increases, leading to increased line impedance and risk of poor electrical contact; an increase in installation effort caused by the coupling; an increase in the space occupied by the electrical cabinet by the plurality of elements; an increase in cost, etc. Therefore, in order to fill the market gap, it is necessary to provide a product which not only can meet the normal functional requirements of the electrical cabinet, but also can overcome the defects.

Disclosure of Invention

In view of the drawbacks of the prior art, the present utility model is directed to an improved switching device that can save complex and numerous electrical contacts between various electrical components, reduce space requirements, and reduce installation effort.

In order to solve the above technical problems, the present utility model provides a switching device, including: a frame; the main contact group comprises a main fixed contact fixedly arranged on the frame and a driving contact pivotable relative to the main fixed contact; the pre-charging contact group comprises a pre-charging fixed contact fixedly arranged on the frame and a pre-charging movable contact which can pivot relative to the pre-charging fixed contact; the operation mechanism comprises an actuation disc for actuating the active contact and a pre-charging actuation device for actuating the pre-charging moving contact, wherein the actuation disc is rotatably supported on the frame, the pre-charging actuation device is slidably supported on the frame, and the rotation of the actuation disc drives the pre-charging actuation device to slide; and a locking unit for locking and unlocking the operating mechanism. According to the utility model, the locking unit locks the operating mechanism after the pre-charging moving contact and the pre-charging fixed contact are closed and before the driving contact and the main fixed contact are closed in the closing process of the switching device; in the switching-off process of the switching device, the locking unit locks the operating mechanism after the pre-charging moving contact is disconnected with the pre-charging fixed contact and before the driving contact is disconnected with the main fixed contact. Therefore, in the switching-on process of the switching device, before the active contact and the main fixed contact are closed, the pre-charging moving contact and the pre-charging fixed contact are closed; in the switching-off process of the switching device, before the active contact is disconnected from the main fixed contact, the pre-charging moving contact is disconnected from the pre-charging fixed contact.

The main contact group is configured to be switchable between a closing position in which the main stationary contact and the active contact are closed, and a separating position in which the main stationary contact and the active contact are opened; the pre-charge contact set is configured to be switchable between a pre-charge position in which the pre-charge stationary contact and the pre-charge stationary head are closed, and a pre-charge position in which the pre-charge stationary contact and the pre-charge movable contact are open.

In the utility model, the driving force or the driving torque applied by the motor or the manually operated handle is transmitted to the driving contact of the main contact group through the transmission of the operating mechanism, so that the movement of the driving contact relative to the main static contact is realized, and the driving contact and the main static contact are closed and opened. Therefore, the main contact group comprising the active contact and the main static contact realizes the switching of the switching device between the switching-on position and the switching-off position. In this regard, the main contact set functions as a disconnector. Furthermore, the drive force or drive torque is transmitted to the priming contact set by the priming actuator. The cooperation of the pre-charging actuating device and the locking unit realizes a specific activity sequence between the main contact group and the pre-charging contact group, and before the main contact group is switched from the opening position to the closing position, the pre-charging contact group is closed before the main contact group; the pre-charge contact set is opened prior to the main contact set before the main contact set is switched from the closing position to the opening position. The structure is simplified, the space is intensive, the installation procedure is reduced and saved while the normal functionality is ensured, and in addition, the safety risk caused by poor connection is reduced due to fewer electric connection contact points.

Preferably, the pre-charge actuation device comprises a first actuation half and a second actuation half, between which the pre-charge actuation contact is pivotably arranged, the pre-charge actuation contact being pivoted under the action of the first actuation half or the second actuation half, wherein the spacing between the first actuation half and the second actuation half is adjusted by a relative movement between the first actuation half and the second actuation half.

Preferably, the first actuation half comprises a catch groove and the second actuation half comprises a catch pin, which can be snapped into the catch groove.

Preferably, when the active contact is closed with the main stationary contact, the latching pin latches in the latching groove, wherein the distance between the first actuation half and the second actuation half is minimal; when the active contact is disconnected from the main fixed contact, the locking pin is released from the locking groove, wherein the distance between the first actuating half part and the second actuating half part is the largest.

Preferably, the locking unit is pivotably connected to the frame, wherein the rotational movement of the actuating disk is locked and unlocked by the cooperation of the locking unit with the locking projection of the actuating mechanism.

Preferably, the actuating disc rotates in a first direction during closing of the switching device, and the locking unit locks the actuating disc after the pre-charge moving contact is closed with the pre-charge fixed contact and before the active contact is closed with the main fixed contact. Preferably, the locking unit unlocks the actuation disc such that the actuation disc continues to rotate in the first direction to close the active contact with the main stationary contact.

Preferably, the actuating disc rotates in the second direction during opening of the switching device, and the locking unit locks the actuating disc after the pre-charging moving contact is disconnected from the pre-charging fixed contact and before the driving contact is disconnected from the main fixed contact. Preferably, the locking unit unlocks the actuation disc so that the actuation disc continues to rotate in the second direction to disconnect the active contact from the main stationary contact.

Preferably, the switching device comprises a mechanical energy storage device for providing additional power for closing or opening the active contact.

In order to solve the technical problem, the utility model also provides an electrical cabinet which is provided with the switch device.

Drawings

Embodiments of the present utility model are described in detail below with reference to the drawings.

Fig. 1 schematically shows a side view of a switching device according to the utility model;

fig. 2 schematically shows a perspective view of the switching device shown in fig. 1;

fig. 3 schematically shows a partial perspective view of the switching device shown in fig. 1;

fig. 4 schematically shows the switching device in a switched-off state, wherein both the pre-charge contact set and the main contact set are open;

fig. 5 schematically illustrates the switching device of fig. 4, wherein the pre-charge contact set is closed and the mechanical energy storage device is in a dead-center position;

fig. 6 schematically shows a subsequent state of the switching device shown in fig. 4;

fig. 7 schematically shows the switching device in a closed state, wherein both the pre-charge contact set and the main contact set are closed;

fig. 8 schematically illustrates the switching device of fig. 7, wherein the pre-charge contact set is open and the mechanical energy storage device is in a dead-center position;

fig. 9 schematically shows the switching device in an off state, wherein both the pre-charge contact set and the main contact set are open.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Fig. 1 and 2 show a switching device 1 according to the utility model, comprising a main contact set and a pre-charge contact set. The main contact group comprises a main fixed contact 11 fixedly mounted on the frame 2 and a main contact 12 pivotable relative to the main fixed contact, the main contact group being configured to be switchable between a closing position, in which the main fixed contact 11 and the main contact 12 are closed, and a breaking position, in which the main fixed contact 11 and the main contact 12 are open. The pre-charge contact set comprises a pre-charge fixed contact 13 fixedly mounted on the frame and a pre-charge movable contact 14 pivotable relative to the pre-charge fixed contact, the pre-charge contact set being configured to be switchable between a pre-charge position in which the pre-charge fixed contact 13 and the pre-charge fixed contact 14 are closed and a pre-full position in which the pre-charge fixed contact 13 and the pre-charge movable contact 14 are open. Furthermore, biasing means are provided for the pre-charge contacts 14 for holding the pre-charge contacts 14 in the pre-full or pre-charge position. In the embodiment shown in fig. 1, the biasing means is configured as a torsion spring.

The switching device 1 comprises an operating mechanism 3. The operating mechanism 3 comprises a drive disc 30, an actuator disc 31, a pre-charge actuator device 32. The drive plate 30 is connected to a power source, which may be an electric motor or a handle manually operated by a worker. The drive disk 30 rotates under the action of a driving force, thereby generating a driving torque, which is transmitted to an actuator disk 31 arranged coaxially with the drive disk 30 and in power connection with the drive disk 30. The actuator disc 31 is rotatably supported on the frame 2, and transmits the driving torque of the driving disc 30 to the active contact assembly, so that the active contact 12 rotates under the driving of the driving torque.

The priming actuator 32 includes a relatively movable first actuator half 321 and a second actuator half 322. In the embodiment shown in fig. 3, the first and second actuating halves 321, 322 are configured as flat planar pieces, the second actuating half 322 being translatable along a guide slot configured in the first actuating half 321. The priming actuator 32 is mounted on the frame 2 in a sliding manner as a whole, wherein a sliding slot 21 is formed on the frame 2, into which the priming actuator 32 can slide, and the first actuation half 321 is slidably inserted with its bottom projection into the sliding slot 21.

The pre-charge contact 14 is pivotally mounted between the first and second actuation halves 321, 322. The first actuation edge 321b of the first actuation half 321 is configured to pivot the pre-charge movable contact 14 to close with the pre-charge stationary contact; the second actuation edge 322b of the second actuation half 322 is configured to pivot the pre-charge contact 14 to disconnect from the pre-charge stationary contact.

An elastically deformable catch 321a is formed on the first actuating half 321, and a protruding catch 322a is formed on the second actuating half 322. The catch 321a is generally C-shaped, with the entrance of the catch 321a having a slightly smaller bayonet size than the diameter of the latch 322a, and the latch 322a is able to compress and force the catch 321a to resiliently expand and thereby be snapped into the catch 321 a.

Between the drive disc 30 and the actuation disc 31 is connected an axially extending priming drive pin 33, the first actuation half 321 being pivotably connected to the priming drive pin 33 by means of a connecting rod. The priming drive pin 33 is rotated when the drive disk 30 and the actuation disk 31 are rotated and thereby pulls the first actuation half 321 to slide along the chute 21. When the first actuating half 321 is pulled to the left, the latch 322a on the second actuating half 322 abuts against the entrance of the latch 321a of the first actuating half 321, at which time, when the first actuating half 321 is pulled further to the left, the latch 322a is pressed into the latch 321a, so that there is no longer a relative movement between the first actuating half 321 and the first actuating half 322, but rather is brought as a whole by the priming drive pin 33, at which time the distance between the first actuating half 321 and the second actuating half 322, more precisely the distance between the first actuating edge 321b and the second actuating edge 322b, is minimal. When the first actuating half 321 is pulled to the right into the extreme position, the latching pin 322a is disengaged from the latching groove 321a, so that the first actuating half 321 and the second actuating half 322 can be moved relative to one another again, the distance between the first actuating half 321 and the second actuating half 322, that is to say the distance between the first actuating edge 321b and the second actuating edge 322b, being maximized.

The switching device 1 further comprises mechanical energy storage means 35, as shown in fig. 3, the mechanical energy storage means 35 being arranged in pairs on diametrically opposite sides of the actuator disc 31. A main charging drive pin 34, axially parallel to the pre-charging drive pin 33, is also provided between the drive disc 30 and the actuator disc 31, and the charging pivot pin 22 is provided on the frame 2. In the embodiment shown in fig. 3, the mechanical energy storage device 35 is formed with a fork at one end and a longitudinally extending slot at the other end, between which a spring, not shown in detail in the figures, is also arranged. The fork is pivotally supported against the main charge drive pin 34 and the slot is provided through the charge pivot pin 22 and movable relative to the charge pivot pin 22. As the actuator disc 31 rotates under the drive of the drive disc 30, the distance between the main charge drive pin 34 and the charge pivot pin 22 decreases or increases, thereby compressing and expanding the spring. When the spring is compressed to its maximum extent, i.e. reaches its dead point, the charging pivot pins 22 on both sides of the actuator disc 31 are in line with the main charging drive pin 34.

The switching device 1 further comprises a locking unit 4. The lock unit 4 includes a first lock lever 41 and a second lock lever 42 pivotally mounted on the chassis 2 about a common rotation axis. As shown in fig. 1, the first latch lever 41 is longer than the second latch lever 42, and the first latch lever 41 has a first latch hook at a free end thereof, which is gentle on the left side, steep on the right side, and the second latch lever 42 has a latch hook at a free end thereof, which is steep on the left side, gentle on the right side. A latch protrusion 30a that cooperates with the first and second lock bars 41 and 42 is formed on the outer circumference of the driving disk 30.

In this embodiment, the lock unit 4 is configured to be electromagnetic, and when it is triggered by a signal, causes the first lock lever 41 or the second lock lever 42 to pivot counterclockwise, thereby unlocking the operating mechanism.

The working principle of the switching device according to the utility model is explained below with reference to fig. 4 to 9.

In the state shown in fig. 4, the switching device is in the open state, in which the main stationary contact 11 and the active contact 12 are disconnected, i.e. in the open position, and the pre-charge stationary contact 13 and the pre-charge movable contact 14 are disconnected, i.e. in the pre-full position. The biasing means for the pre-charge contact 14 is configured as a torsion spring whose force line action direction is located above the pre-charge contact 14, so that a torque is generated to the pre-charge contact 14 to rotate it clockwise, thereby holding it in the pre-full position.

When it is necessary to switch the switching device 1 from the off state to the on state, the driving plate 30 is moved in the clockwise direction as shown in fig. 5 by a handle or a motor, not shown, and thereby drives the actuating plate 31 to move in the clockwise direction. The clockwise rotation of the actuating disk 31 again effects a rightward sliding movement of the priming actuating device 32, whereby the first actuating edge 321b of the priming actuating device 32 cooperates with the priming contact 14, causing the priming contact 14 to rotate counterclockwise and to close with the priming stationary contact 13, thereby effecting a priming position of the priming contact group, wherein the force line of the torsion spring for the priming contact 14 is located to the left of the rotation center of the priming contact, thereby holding it in the priming position. At the same time, the clockwise rotation of the actuator disc 31 brings the charge pivot pins 22, 33 on both sides of the actuator disc 31 in line, at which time the mechanical charge means 35 is compressed and charged and is in its dead-center position. The active contact 12 is also rotated clockwise by the actuation disc 31, but at this point the active contact 12 has not yet reached a closed position with the main stationary contact 11.

Subsequently, the mechanical energy storage means 35 passes the dead point position and releases the energy, thereby causing the actuator disc 31 to continue to rotate in the clockwise direction to the position shown in fig. 6, at which time the continued rotation of the actuator disc 31 is prevented by the latching between the latching protrusion 30a and the first locking lever 41 of the locking unit 4. Although the priming drive 32 translates to the left, no interference occurs between its second actuation edge 322b and the priming contact 14 due to the spacing therebetween. At this time, the pre-charging moving contact 14 still keeps closed with the pre-charging fixed contact 13, and the active contact 12 still keeps open with the main fixed contact 11.

Subsequently, the system signals and causes the first lock lever 41 of the locking unit 4 to pivot counterclockwise, thereby releasing the latch between the first lock lever 41 and the latch protrusion 30a, and the actuating disc 31 continues to rotate in the clockwise direction, thereby driving the driving contact 12 to contact the main stationary contact 11, thereby achieving the closing position of the main contact group, as shown in fig. 7. At this time, the first actuating half 321 moves leftward, so that the latch pin 322a of the second actuating half 322 is inserted into the latch groove 321a of the first actuating half 321, and the pre-charging contact 14 still maintains the pre-charging position with the pre-charging fixed contact 13.

The switching-on of the switching device 1 is thus completed, and a switching from the off-state to the on-state of the switching device is achieved.

When it is necessary to switch the switching device 1 from the on state to the off state, the driving disk 30 is rotated in the counterclockwise direction as shown in fig. 8 by a handle or a motor, not shown, and thereby drives the actuating disk 31 to rotate in the counterclockwise direction. The counterclockwise rotation of the actuator disk 31 in turn effects a leftward sliding movement of the priming actuator 32. Since the previous latch pin 322a latches in the latch slot 321a, the distance between the first and second actuating halves 321, 322 is minimal and both move to the left as a whole, thereby immediately pivoting the pre-charge contact 14 in the clockwise direction by the cooperation of the second actuating edge 322b with the pre-charge contact 14, disconnecting the pre-charge stationary contact 13, thus achieving a pre-full position of the pre-charge contact set, wherein the force line of the torsion spring for the pre-charge contact 14 is located above the rotation center of the pre-charge contact, thus keeping it in the pre-full position. The counterclockwise rotation of the actuator disc 31 brings the charge pivot pins 22, the main charge drive pin 33 on both sides of the actuator disc 31 in line, when the mechanical charge device 35 is compressed and charged and in its dead-center position. At the same time, the latching protrusion 30a slides over the gentle slope of the left side of the first latch hook of the first latch lever 41 and is latched on the steep face of the left side of the second latch hook of the second latch lever 42, thereby preventing the actuation disc 31 from rotating further in the counterclockwise direction. At this time, the active contact 12 remains in the closing position with the main stationary contact 11.

Subsequently, the system signals and causes the first lock lever 42 of the locking unit 4 to pivot counterclockwise, thereby releasing the latch between the first lock lever 42 and the latch protrusion 30a, allowing the mechanical energy storage device 35 to pass the dead point position, causing the actuator disc 31 to continue to rotate in the counterclockwise direction, thereby driving the active contact 12 to disconnect from the main stationary contact 11, and thus achieving the opening position of the main contact group, as shown in fig. 9.

The switching off of the switching device 1 is thus completed, and a switching from the closed state of the switching device to the open state is achieved.

List of reference numerals

1. Switching device

11. Main static contact

12. Active contact

13. Pre-charging static contact

14. Pre-charging moving contact

2. Rack

21. Sliding chute

22. Energy storage pivot pin

3. Operating mechanism

30. Driving disc

30a latch projection

31. Actuating disk

32. Prefilled actuator

321. First actuating half

321a clamping groove

321b first actuation edge

322. A second actuating half

322a latch pin

322b second actuation edge

33. Prefilled drive pin

34. Main charging driving pin

35. Mechanical energy storage device

4. Locking unit

41. First lock rod

42. And a second lock lever.

Claims (11)

1. A switching device (1), characterized in that it comprises:

a frame (2);

the main contact group comprises a main fixed contact (11) fixedly arranged on the frame and a driving contact (12) pivotable relative to the main fixed contact;

the pre-charging contact group comprises a pre-charging fixed contact (13) fixedly arranged on the frame and a pre-charging movable contact (14) pivotable relative to the pre-charging fixed contact;

an operating mechanism (3) comprising an actuating disc (31) for actuating the active contact (12) and a pre-charging actuating device (32) for actuating the pre-charging moving contact (14), wherein the actuating disc (31) is rotatably supported on the frame (2), the pre-charging actuating device (32) is slidably supported on the frame (2), and the rotation of the actuating disc (31) drives the pre-charging actuating device (32) to slide; and

a locking unit (4) for locking and unlocking the operating mechanism (3),

during the closing process of the switching device (1), after the pre-charging moving contact (14) and the pre-charging fixed contact (13) are closed and before the driving contact (12) and the main fixed contact (11) are closed, the locking unit (4) locks the operating mechanism (3); in the process of opening the switch device (1), the locking unit (4) locks the operating mechanism (3) after the pre-charging moving contact (14) is disconnected with the pre-charging fixed contact (13) and before the driving contact (12) is disconnected with the main fixed contact (11).

2. Switching device (1) according to claim 1, characterized in that the pre-charge actuation means (32) comprises a first actuation half (321) and a second actuation half (322), the pre-charge contact (14) being pivotably arranged between the first actuation half (321) and the second actuation half (322), the pre-charge contact (14) being pivoted under the effect of the first actuation half (321) or the second actuation half (322), wherein the spacing between the first actuation half (321) and the second actuation half (322) is adjusted by a relative movement between the first actuation half (321) and the second actuation half (322).

3. Switching device (1) according to claim 2, characterized in that the first actuation half (321) comprises a catch (321 a) and the second actuation half (322) comprises a catch pin (322 a), the catch pin (322 a) being lockable in the catch (321 a).

4. A switching device (1) according to claim 3, characterized in that the latching pin (322 a) latches in the latching groove (321 a) when the active contact (12) is closed with the main stationary contact (11), wherein the distance between the first actuation half (321) and the second actuation half (322) is minimal; when the active contact (12) is disconnected from the main stationary contact (11), the latching pin (322 a) is released from the latching groove (321 a), wherein the distance between the first actuating half (321) and the second actuating half (322) is the largest.

5. Switching device (1) according to claim 1, characterized in that the locking unit (4) is pivotably connected to the frame (2), wherein the rotational movement of the actuating disc (31) is locked and unlocked by the co-operation of the locking unit (4) with the locking projection (30 a) of the operating mechanism (3).

6. Switching device (1) according to claim 5, characterized in that the actuating disc (31) rotates in the first direction during closing of the switching device (1), and the locking unit (4) latches the actuating disc (31) after closing the pre-charge moving contact (14) with the pre-charge stationary contact (13) and before closing the active contact (12) with the main stationary contact (11).

7. Switching device (1) according to claim 6, characterized in that the locking unit (4) unlocks the actuation disc (31) so that the actuation disc (31) continues to rotate in the first direction to close the active contact (12) with the main stationary contact (11).

8. Switching device (1) according to claim 5, characterized in that the actuating disc (31) rotates in the second direction during opening of the switching device (1), and the locking unit (4) latches the actuating disc (31) after the pre-charge moving contact (14) is disconnected from the pre-charge stationary contact (13) and before the active contact (12) is disconnected from the main stationary contact (11).

9. Switching device (1) according to claim 8, characterized in that the locking unit (4) unlocks the actuation disc (31) so that the actuation disc (31) continues to rotate in the second direction to disconnect the active contact (12) from the main stationary contact (11).

10. Switching device (1) according to claim 1, characterized in that the switching device (1) comprises a mechanical energy storage device for providing additional power for switching on or off the active contact (12).

11. An electrical cabinet, characterized in that it has a switching device (1) according to any one of the preceding claims 1 to 10.

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