CN214898140U

CN214898140U - A control assembly and cubical switchboard for cubical switchboard

Info

Publication number: CN214898140U
Application number: CN202120940139.XU
Authority: CN
Inventors: 李晨虎
Original assignee: ABB Schweiz AG
Current assignee: ABB Schweiz AG
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-11-26
Anticipated expiration: 2031-04-30

Abstract

Embodiments of the present disclosure relate to a control assembly for a switchgear and a switchgear. The control component comprises a main shaft (20), a movable contact (32), a first driving piece (10) and a transmission system (22). The movable contact (32) is coupled to the main shaft (20) and is capable of rotating with the main shaft (20). The first drive member (10) has an output shaft (12). The transmission system (22) is coupled between the output shaft (12) and the main shaft (20) and is configured to drive the main shaft (20) to rotate in response to the rotation of the output shaft (12) so as to couple or decouple the movable contact (32) with or from a fixed contact (34) fixed on the switch cabinet (1). According to the embodiment of the disclosure, the first driving part can drive the main shaft of the control assembly through the driving system, so that the coupling and the decoupling of the movable contact and the fixed contact can be controlled in a convenient manner.

Description

A control assembly and cubical switchboard for cubical switchboard

Technical Field

Embodiments of the present disclosure generally relate to the electrical field, and more particularly, to a control assembly for a switchgear and a corresponding switchgear.

Background

In the electrical field, a switchgear is an important electrical apparatus. The main function of the switch cabinet is to open and close, control and protect electric equipment in the process of power generation, power transmission, power distribution and electric energy conversion of an electric power system. The components in the switch cabinet comprise a circuit breaker, an earthing switch, a disconnecting switch, a load switch, an operating mechanism, a mutual inductor, various protection devices and the like. How to optimize the convenience of operation of the switchgear and reduce the cost of maintaining the switchgear is a challenge facing designers.

SUMMERY OF THE UTILITY MODEL

Some methods have been proposed to improve the switchgear. For example, in chinese patent CN207165479U, an electric operating mechanism cooperating with a grounding switch is proposed. In the electric operating mechanism, an electric driving part, a transmission mechanism and an interlocking mechanism are arranged, the interlocking mechanism changes the direction of the power of the electric driving part and acts on a grounding interlocking plate, a handcart advancing mechanism is locked through the cooperation of the interlocking mechanism and the grounding interlocking plate, when the electric driving part operates a grounding switch to be switched off, the cooperation of the interlocking mechanism and the grounding interlocking plate is released, the interlocking mechanism is reset under the action of a resetting mechanism, and the handcart advancing mechanism is unlocked. Such a structure results in many parts and makes the operating mechanism complicated, thus resulting in high manufacturing and maintenance costs, and the popularization thereof is greatly limited.

Embodiments of the present disclosure provide a control assembly for a switchgear and a corresponding switchgear, which aim to solve the above and/or other potential problems existing in the existing solutions.

In a first aspect, embodiments of the present disclosure relate to a control assembly for a switchgear. The control assembly includes: a main shaft; a movable contact coupled to the main shaft and capable of rotating with the main shaft; a first drive member having an output shaft; and the transmission system is coupled between the output shaft and the main shaft and is configured to drive the main shaft to rotate in response to the rotation of the output shaft so as to couple or decouple the movable contact with or from the fixed contact fixed on the switch cabinet.

According to the embodiment of the disclosure, the first driving part can drive the main shaft of the control assembly through the driving system, so that the coupling and the decoupling of the movable contact and the fixed contact can be controlled in a convenient manner.

In some embodiments, the control assembly further comprises: a second drive coupled to the drive train, the second drive configured to drive the spindle to rotate via the drive train when the first drive is not operating. By means of the arrangement, the driving modes of the moving contact and the fixed contact can be expanded.

In some embodiments, the control assembly further comprises: a clutch disposed between the drive train and the output shaft of the first driver, the clutch configured to couple the output shaft of the first driver to the drive train when the first driver is operational and to decouple the output shaft from the drive train when the first driver is not operational. With this arrangement, interference between the two drive modes is prevented, thereby ensuring safe operation of the control assembly.

In some embodiments, the drive train comprises: a first transmission shaft coupled to the clutch and provided with a first gear; and a second transmission shaft offset from the first transmission shaft and having a second gear and a third gear disposed thereon, the second gear being engaged with the first gear, the third gear being engaged with a fourth gear disposed on the main shaft. With this arrangement, the drive train is simple in structure and can operate smoothly.

In some embodiments, the first gear and the second gear are spur gears. With this arrangement, the operation of the drive train can be maintained in a reliable manner.

In some embodiments, the third gear and the fourth gear are bevel gears. With this arrangement, a reasonable layout of the drive train of the control assembly can be provided.

In some embodiments, the first drive shaft is coupled to a second drive configured to drive rotation of the spindle via the first drive shaft and the second drive shaft when the first drive is not operating. With this arrangement, malfunction of the control components due to mutual interference can be avoided.

In some embodiments, the control assembly further comprises a microswitch disposed on the control assembly; wherein the drive train includes a cam configured to cause a protruding portion of the cam to contact the microswitch as the drive train is driven. With this arrangement, the position of the cam can be conveniently monitored, thereby determining the joint state of the movable contact and the fixed contact.

In some embodiments, the first drive member comprises a motor. With this arrangement, the electric drive of the control assembly can be realized in a cost-effective manner.

In some embodiments, the second driver comprises a threaded member adapted to receive a driving torque from the outside. With this arrangement, manual actuation of the control assembly can be achieved in a cost-effective manner.

In a second aspect, embodiments of the present disclosure relate to a switchgear. This cubical switchboard includes: the body comprises a static contact; and a control assembly according to the first aspect of the present disclosure, the control assembly being configured to control coupling and decoupling of the movable contact and the stationary contact of the control assembly.

Drawings

The above and other objects, features and advantages of the embodiments of the present disclosure will become more readily understood through the following detailed description with reference to the accompanying drawings. Various embodiments of the present disclosure will be described by way of example and not limitation in the accompanying drawings, in which:

fig. 1 shows a schematic perspective view of a switchgear according to an embodiment of the present disclosure;

fig. 2 shows a schematic perspective view of another angle of the switchgear cabinet shown in fig. 1;

FIG. 3 shows an enlarged partial view of the switchgear cabinet shown in FIG. 2, illustrating a schematic perspective view of a control assembly according to an embodiment of the present disclosure;

FIG. 4 illustrates an exploded view of a control assembly according to an embodiment of the present disclosure; and

fig. 5 illustrates another exploded view of a control assembly according to an embodiment of the present disclosure.

Detailed Description

The principles of the present disclosure will now be described with reference to various exemplary embodiments shown in the drawings. It should be understood that these examples are described merely to enable those skilled in the art to better understand and further implement the present disclosure, and are not intended to limit the scope of the present disclosure in any way. It should be noted that where feasible, similar or identical reference numerals may be used in the figures and that similar or identical reference numerals may indicate similar or identical functions. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the invention described herein.

In describing embodiments of the present disclosure, the terms "include" and its derivatives should be interpreted as being open-ended, i.e., "including but not limited to. The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.

Some illustrative implementations of a control assembly according to embodiments of the present disclosure will be described below with reference to fig. 1-5.

Fig. 1 and 2 show schematic perspective views from different angles of a switchgear 1 according to an embodiment of the present disclosure, respectively. As shown, the switchgear 1 comprises a control assembly 2. The control assembly 2 may be used to control the opening or closing of the earthing switch in the switchgear 1. When the switch cabinet 1 needs to be maintained, the grounding switch needs to be closed, so that the safety of personnel and equipment is guaranteed. After the maintenance is completed, the earthing switch will be opened to resume normal operation of the switchgear 1.

Fig. 3 to 5 show schematic views of a control assembly 2 for a switchgear 1 according to an embodiment of the present disclosure, wherein fig. 3 is an enlarged view of a portion a in fig. 2.

As shown in fig. 3, the grounding switch is opened or closed by coupling and decoupling a movable contact 32 disposed on the control assembly 2 with a stationary contact 34 fixed on the body of the switchgear 1. The movable contact 32 is coupled to the main shaft 20 of the control assembly 2 and can rotate together with the main shaft 20, thus completing the coupling and uncoupling with the stationary contact 34. Fig. 3 shows the movable contact 32 disconnected from the stationary contact 34.

Fig. 4 shows an exploded schematic view of the control assembly 2 from an angle different from that of fig. 3. As shown in fig. 4, the control assembly 2 comprises a first drive member 10 having an output shaft 12 and a drive train 22. As can be seen in connection with fig. 3 and 4, a drive train 22 is coupled between the output shaft 12 and the main shaft 20, thereby enabling a driving operation therebetween. As the output shaft 12 of the first driving member 10 rotates, the main shaft 20 can rotate around itself through the transmission of the transmission system 22, so as to drive the movable contact 32 to approach and couple with the stationary contact 34, or drive the movable contact 32 to disengage from and move away from the stationary contact 34.

According to the embodiment of the present disclosure, by driving the main shaft 20 to rotate via the driving train 22 by using the first driving member 10, the control of the movable contact 32 can be realized in a reliable manner.

In some embodiments, the first drive member 10 may be an electric motor. The motor may be rotated under the control of a controller (not shown) to rotate the spindle 20. In some embodiments, the motor may be a modular design that facilitates installation and removal of the whole, thereby reducing the time cost of maintenance. In other embodiments, the motor may be of other types as well, and the scope of the present disclosure is not limited in this respect.

In some embodiments, as shown in fig. 3 and 4, the control assembly 2 may further include a second drive member 50. The second drive member 50 is coupled to the drive train 22 and is adapted to drive the spindle 20 for rotation via the drive train 22 when the first drive member 10 is not in operation. With this arrangement, another drive mode for the spindle 20 can be achieved.

In some embodiments, as shown in fig. 4 and 5, drive train 22 includes a first drive shaft 221 and a second drive shaft 222. The first and

second transmission shafts

221 and 222 may be acted upon by engagement between first and

second gears

231 and 232 respectively provided thereon, thereby achieving mutual transmission between the first and

second transmission shafts

221 and 222.

Referring back to fig. 3, a third gear 233 is further disposed on the second transmission shaft 222, and the third gear 233 can be engaged with a fourth gear 234 disposed on the main shaft 20, so as to transmit the motion of the second transmission shaft 222 to the main shaft 20, so as to realize the disconnection and coupling of the movable contact 32 and the fixed contact 34.

In some embodiments, as shown in fig. 4, the control assembly 2 may further include a clutch 40 disposed between the drive train 22 and the output shaft 12 of the first driver 10. The clutch 40 is coupled to the first transmission shaft 221.

When the first driver 10 is operated, the clutch 40 can couple the output shaft 12 of the first driver 10 to the first transmission shaft 221 of the transmission system 22 to transmit the transmission of the output shaft 12 to the main shaft 20 through the first transmission shaft 221 and the second transmission shaft 222, thereby realizing an automatic driving mode using the first driver 10.

When the first driver 10 is not operating, the clutch 40 decouples the output shaft 12 from the first transmission shaft 221 of the transmission 22. The second driving member 50 coupled to the second transmission shaft 222 can rotate under the action of the external force. Through the transmission of the second transmission shaft 222 and the third and fourth gears 233 and 234, the second driving member 50 can drive the main shaft 20 to rotate, thereby realizing a driving mode different from the first mode. Since the clutch 40 has now disconnected the output shaft 12 of the first driver 10 from the first transmission shaft 221 of the transmission 22, the rotation of the first transmission shaft 221 will not have an effect on the first driver 10, thereby ensuring safe operation.

In some embodiments, the second driver 50 comprises a threaded member adapted to receive a driving torque from the outside. In some embodiments, as shown in fig. 3, the drive torque may be applied by screwing the long screw 52. One end of the long screw 52 may be coupled to the second driving member 50, and the other end may be exposed to the outside of the switchgear 1. That is, the operator only needs to rotate the exposed end of the long screw 52, so as to rotate the main shaft 20 through the second driving member 50 and the transmission system 22, thereby coupling and decoupling the movable contact 32 and the stationary contact 34. The operating personnel need not to get into the inside of cubical switchboard, can promote operating personnel's convenience and security from this widely.

In some embodiments, the first gear 231 and the second gear 232 may be spur gears. The spur gear effectively ensures transmission efficiency, and in this way, when the second driving member 50 is manually driven, the operator can rotate the main shaft 20 through the transmission 22 without much effort, thereby improving maintenance efficiency.

In some embodiments, the third gear 233 and the fourth gear 234 may be bevel gears. With this arrangement, the direction of the transmission can be changed, so that the spatial layout of the control assembly 2 is more rational and compact. It should be understood that this is merely illustrative and that the selection of a particular gear may be determined based on the spatial location of the components. Depending on the needs of the user and the transmission requirements, either an external gear as shown or an internal gear may be selected. Embodiments of the present disclosure are not limited in this regard.

In some embodiments, as shown in fig. 4 or 5, the control assembly 2 may further include a micro-switch 70 and a cam 60. The microswitch 70 is provided on the control assembly 2 and the cam 60 may be provided on the second drive shaft 222 of the drive train 22. As the drive train 22 drives, the cam 60 rotates with the second drive shaft 222 and its projection will contact and activate the microswitch 70.

In some embodiments, as shown in fig. 4 or 5, two microswitches 70 may be provided, one microswitch 70 of the two microswitches 70 being positioned such that: when it is contacted and activated by the cam 60, the second transmission shaft 222 and the main shaft 20 are driven to the first position (this represents that the movable contact 32 is disconnected from the fixed contact 34). The position of the other microswitch 70 of the two microswitches 70 is designed such that: when it is contacted and triggered by the cam 60, the second transmission shaft 222 and the main shaft 20 are driven to the second position (this represents that the movable contact 32 and the fixed contact 34 are coupled). With this arrangement, the operator can know the positional relationship between the movable contact 32 and the stationary contact 34 inside the switchgear 1, thereby more accurately operating the first driving member 10 or the second driving member 50.

Compared with the traditional mode, the grounding switch in the switch cabinet 1 according to the embodiment of the disclosure can be driven in two modes which are not interfered with each other, so that the operation convenience is improved, and more diversified driving options are provided for operators.

Although claims have been formulated in this application to particular combinations of features, it should be understood that the scope of the disclosure also includes any novel feature or any novel combination of features disclosed herein either explicitly or implicitly or any generalisation thereof, whether or not it relates to the same aspect as presently claimed in any claim.

Claims

1. A control assembly for a switchgear, comprising:

a main shaft (20);

a movable contact (32) coupled to the main shaft (20) and rotatable with the main shaft (20);

a first drive member (10) having an output shaft (12); and

a transmission system (22) coupled between the output shaft (12) and the main shaft (20) and configured to drive the main shaft (20) to rotate in response to the rotation of the output shaft (12) so as to couple or decouple the movable contact (32) with or from a fixed contact (34) fixed on the switch cabinet (1).

2. The control assembly of claim 1, further comprising:

a second drive (50) coupled to the drive train (22), the second drive (50) configured to drive the spindle (20) in rotation via the drive train (22) when the first drive (10) is not in operation.

3. The control assembly of claim 1, further comprising:

a clutch (40) disposed between the drive train (22) and the output shaft (12) of the first driver (10), the clutch (40) configured to couple the output shaft (12) of the first driver (10) to the drive train (22) when the first driver (10) is operational and to decouple the output shaft (12) from the drive train (22) when the first driver (10) is not operational.

4. The control assembly of claim 3,

the power train (22) includes:

a first transmission shaft (221) coupled to the clutch (40), and a first gear (231) is provided on the first transmission shaft (221); and

a second transmission shaft (222) offset from the first transmission shaft (221) and on which second transmission shaft (222) a second gear (232) and a third gear (233) are arranged, the second gear being in engagement with the first gear (231), the third gear (233) being in engagement with a fourth gear (234) arranged on the main shaft (20).

5. The control assembly according to claim 4, wherein the first gear (231) and the second gear (232) are spur gears.

6. The control assembly according to claim 4, wherein the third gear (233) and the fourth gear (234) are conical gears.

7. The control assembly of claim 4, wherein the first drive shaft (221) is coupled to a second drive (50), the second drive (50) being configured to drive the main shaft (20) in rotation via the first drive shaft (221) and the second drive shaft (222) when the first drive (10) is not in operation.

8. The control assembly according to claim 1, further comprising a microswitch (70), the microswitch (70) being provided on the control assembly (2);

wherein the drive train (22) comprises a cam (60), the cam (60) being configured to cause a protruding portion of the cam (60) to contact the microswitch (70) as the drive train (22) is driven.

9. Control assembly according to any of claims 1-8, characterized in that the first drive member (10) comprises an electric motor.

10. Control assembly according to claim 2 or 7, characterized in that the second drive member (50) comprises a screw member adapted to receive a drive torque from the outside.

11. A switchgear, comprising:

a body comprising a stationary contact (34); and

control assembly according to any one of claims 1 to 10, configured to control the coupling and uncoupling of the movable contact (32) and the stationary contact (34) of the control assembly.