阅读说明：本技术 转换开关和电路系统 (Transfer switch and circuit system ) 是由 许万涛 王天宇 侯小强 谢立军 迟鹏飞 于 2020-06-08 设计创作，主要内容包括：本发明公开了一种转换开关,包括：至少两个第一静触头,至少两个第一静触头分别配置为与负载电连接；转动支架,具有至少两个支臂,支臂具有相对的连接端和自由端,至少两个支臂在连接端相连并在自由端相互分离,连接端形成为第二静触头,每个支臂的自由端形成为动触头,第二静触头配置为与负载电连接,动触头配置为与电源电连接；驱动组件,驱动组件驱动转动支架转动,使得第一静触头与动触头一一对应电连接,或者使得至少部分第一静触头与动触头断开连接。本发明通过一个转换开关实现控制多个电路同时导通,或者多个电路中的部分断开,减少电路系统的开关数量,简化电路系统的结构,降低电路系统的控制难度,提升电路控制的精准度。(The invention discloses a change-over switch, comprising: the at least two first fixed contacts are respectively configured to be electrically connected with a load; the rotating support is provided with at least two support arms, each support arm is provided with a connecting end and a free end which are opposite to each other, the at least two support arms are connected at the connecting ends and are separated from each other at the free ends, the connecting ends are formed into second fixed contacts, the free end of each support arm is formed into a movable contact, the second fixed contacts are configured to be electrically connected with a load, and the movable contacts are configured to be electrically connected with a power supply; the driving component drives the rotating support to rotate, so that the first fixed contacts are electrically connected with the moving contacts in a one-to-one correspondence mode, or at least part of the first fixed contacts are disconnected with the moving contacts. The invention realizes the control of the simultaneous conduction of a plurality of circuits or the disconnection of parts of the circuits through one change-over switch, reduces the switch number of a circuit system, simplifies the structure of the circuit system, reduces the control difficulty of the circuit system and improves the control precision of the circuit.)

1. A transfer switch, comprising:

the at least two first fixed contacts are respectively configured to be electrically connected with a load;

the rotating support is provided with at least two support arms, each support arm is provided with a connecting end and a free end, the connecting ends of the at least two support arms are connected with each other at the connecting ends, the at least two support arms are separated from each other at the free ends, the connecting ends are formed into second fixed contacts, the free end of each support arm is formed into a movable contact, the second fixed contacts are configured to be electrically connected with a load, and the movable contacts are configured to be electrically connected with a power supply;

and the driving component drives the rotating support to rotate, so that the first fixed contacts are electrically connected with the moving contacts in a one-to-one correspondence manner, or at least part of the first fixed contacts are disconnected with the moving contacts.

2. The transfer switch of claim 1, further comprising:

the connecting end of the rotating support is arranged on one of the insulators, and the at least two first fixed contacts are arranged on the rest insulators one by one.

3. The transfer switch of claim 2,

the insulator connected with the rotating support is a rotatable insulator, the driving assembly is connected with the rotatable insulator, and the driving assembly drives the rotatable insulator to rotate so that the rotating support rotates.

4. A diverter switch according to any one of claims 1 to 3, characterized in that said drive assembly comprises:

the transmission part is connected with the rotating bracket;

and the driving piece is connected with the transmission piece and drives the transmission piece to move, so that the transmission piece drives the rotating support to rotate.

5. The transfer switch of claim 4, wherein the drive member comprises:

the cylinder is provided with a cavity, a partition plate is arranged in the cavity, and the cavity is divided into a first cavity and a second cavity by the partition plate;

a first piston rod, a part of which extends into the first cavity and is configured to be capable of moving among a first position, a second position and a third position in the first cavity, wherein the third position is located between the first position and the second position, the part of the first piston rod located outside the first cavity is connected with the transmission member, when the first piston rod moves to the first position or the second position, a part of the first fixed contact is disconnected with the movable contact, and when the first piston rod moves to the third position, the first fixed contact and the movable contact are electrically connected in a one-to-one correspondence manner;

a second piston rod having a portion extending into the second cavity and another portion extending into the first cavity, the second piston rod configured to be movable within the second cavity to urge the first piston rod to the third position.

6. The transfer switch of any one of claims 1 to 3, further comprising:

the mounting base is provided with two opposite surfaces, at least two first fixed contacts and the rotating bracket are arranged on one surface of the mounting base, and the driving assembly is arranged on the other surface of the mounting base;

and/or at least two of the support arms of the rotating support are of an integrated structure;

and/or the drive assembly comprises an electric motor, a pneumatic cylinder or a hydraulic cylinder.

7. A circuit system for a railway power supply system, comprising:

a transfer switch according to any one of claims 1 to 6;

one of the plurality of loads is electrically connected with the second fixed contact of the change-over switch, and the rest of the loads are electrically connected with the first fixed contacts of the change-over switch in a one-to-one correspondence manner;

and the power supply is electrically connected with the moving contact of the change-over switch.

8. The circuitry of claim 7,

a switch is arranged between the second fixed contact and the load connected with the second fixed contact, and the switch controls the second fixed contact and the load connected with the second fixed contact to be switched on or off.

9. The circuitry of claim 7 or 8,

the power supply comprises a first power supply and a second power supply, the first power supply and the second power supply are in one-to-one correspondence and are electrically connected with the moving contact, and the first static contact and the second static contact are configured to be capable of supplying power through the first power supply or the second power supply.

10. The circuitry of claim 7 or 8,

the plurality of loads comprise a first traction transformer, a second traction transformer and a third traction transformer, the first traction transformer and the third traction transformer are correspondingly electrically connected with the first fixed contact one by one, and the second traction transformer is electrically connected with the second fixed contact;

the power supply is electrically connected with the moving contact, wherein a driving component of the change-over switch drives a rotating support to rotate, so that the first traction transformer, the second traction transformer and the third traction transformer are respectively powered by the power supply, or one of the first traction transformer and the third traction transformer is disconnected with the power supply.

Technical Field

The invention belongs to the field of switches, and particularly relates to a change-over switch and a circuit system.

Background

With the continuous improvement of the operation requirements of domestic urban rail vehicles, the requirements on the performance and configuration of the vehicles are correspondingly improved. When the vehicle is provided with three traction transformers, the three traction transformers are required to be effectively removed in time under the condition of a single transformer fault, so that the train can maintain the residual power to continue running. If a plurality of vacuum circuit breakers or a plurality of two-potential high-voltage isolating switches are adopted for cutting, the cost is high, the occupied space is large, and the air supply and control are complex.

The present invention has been made in view of this situation.

Disclosure of Invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a switch for controlling switching or isolation of multiple circuits, so as to implement simultaneous operation of multiple circuits or partial disconnection of multiple circuits.

In order to achieve the purpose, according to one aspect of the invention, the following technical scheme is adopted:

a transfer switch, comprising:

the at least two first fixed contacts are respectively configured to be electrically connected with a load;

the rotating support is provided with at least two support arms, each support arm is provided with a connecting end and a free end, the connecting ends of the at least two support arms are connected with each other at the connecting ends, the at least two support arms are separated from each other at the free ends, the connecting ends are formed into second fixed contacts, the free end of each support arm is formed into a movable contact, the second fixed contacts are configured to be electrically connected with a load, and the movable contacts are configured to be electrically connected with a power supply;

and the driving component drives the rotating support to rotate, so that the first fixed contacts are electrically connected with the moving contacts in a one-to-one correspondence manner, or at least part of the first fixed contacts are disconnected with the moving contacts.

In the above technical solution, the transfer switch further includes:

the connecting end of the rotating support is arranged on one of the insulators, and the at least two first fixed contacts are arranged on the rest insulators one by one.

In the above technical scheme, the insulator connected to the rotating bracket is a rotatable insulator, the driving assembly is connected to the rotatable insulator, and the driving assembly drives the rotatable insulator to rotate, so that the rotating bracket rotates.

In any of the above technical solutions, the driving assembly includes:

the transmission part is connected with the rotating bracket;

and the driving piece is connected with the transmission piece and drives the transmission piece to move, so that the transmission piece drives the rotating support to rotate.

In any of the above solutions, the driving member includes:

the cylinder is provided with a cavity, a partition plate is arranged in the cavity, and the cavity is divided into a first cavity and a second cavity by the partition plate;

a first piston rod, a part of which extends into the first cavity and is configured to be capable of moving among a first position, a second position and a third position in the first cavity, wherein the third position is located between the first position and the second position, the part of the first piston rod located outside the first cavity is connected with the transmission member, when the first piston rod moves to the first position or the second position, a part of the first fixed contact is disconnected with the movable contact, and when the first piston rod moves to the third position, the first fixed contact and the movable contact are electrically connected in a one-to-one correspondence manner;

a second piston rod having a portion extending into the second cavity and another portion extending into the first cavity, the second piston rod configured to be movable within the second cavity to urge the first piston rod to the third position.

In any of the above technical solutions, the transfer switch further includes:

the mounting base is provided with two opposite surfaces, at least two first fixed contacts and the rotating bracket are arranged on one surface of the mounting base, and the driving assembly is arranged on the other surface of the mounting base;

and/or at least two of the support arms of the rotating support are of an integrated structure;

and/or the drive assembly comprises an electric motor, a pneumatic cylinder or a hydraulic cylinder.

In order to achieve the purpose, according to another aspect of the invention, the invention adopts the following technical scheme:

an electrical circuit system for a railway power supply system, comprising:

the change-over switch according to any one of the above technical solutions;

one of the plurality of loads is electrically connected with the second fixed contact of the change-over switch, and the rest of the loads are electrically connected with the first fixed contacts of the change-over switch in a one-to-one correspondence manner;

and the power supply is electrically connected with the moving contact of the change-over switch.

In any of the above technical solutions, a switch is disposed between the second fixed contact and the load connected thereto, and the switch controls the connection or disconnection between the second fixed contact and the load connected thereto.

In any of the above technical solutions, the power supply includes a first power supply and a second power supply, the first power supply and the second power supply are electrically connected to the moving contact in a one-to-one correspondence, and the first stationary contact and the second stationary contact are configured to be capable of being powered by the first power supply or the second power supply.

In any of the above technical solutions, the plurality of loads include a first traction transformer, a second traction transformer and a third traction transformer, the first traction transformer and the third traction transformer are electrically connected to the first fixed contact in a one-to-one correspondence, and the second traction transformer is electrically connected to the second fixed contact;

the power supply is electrically connected with the moving contact, wherein a driving component of the change-over switch drives a rotating support to rotate, so that the first traction transformer, the second traction transformer and the third traction transformer are respectively powered by the power supply, or one of the first traction transformer and the third traction transformer is disconnected with the power supply.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

firstly, compared with the scheme of switching a single-knife-switch rotation control circuit, the rotary support of the invention is provided with at least two support arms, the free ends of the at least two support arms are respectively formed into movable contacts, and the connecting end of the at least two support arms is formed into a second fixed contact, so that the rotary support is provided with at least two support arms, and each support arm can be understood as a knife switch, therefore, a driving component is controlled to drive the rotary support to rotate, so that the first fixed contacts and the movable contacts are electrically connected in a one-to-one correspondence manner, and the current of a power supply flows to each load through each movable contact and each fixed contact of a change-over switch, namely, the rotary support is controlled to rotate, so that the power supply supplies power to a plurality of load circuits through the rotary support, and the plurality of loads are simultaneously electrified, and secondly, the rotary support can be controlled to rotate by the driving, and then make the first static contact disconnected with moving contact disconnect with the power, make the first static contact disconnected with moving contact suspend the work, realize isolating or cutting off some loads, so, compared with different circuit sets up the scheme that the independent switch controls the break-make separately, the invention realizes that controls a plurality of circuits to turn on at the same time through a change-over switch, or some disconnection in a plurality of circuits, on one hand, the change-over switch that the invention provides is simple in construction, easy to realize, on the other hand, the change-over switch of the invention can realize reducing the switch quantity in the circuit system, simplify the structure of the circuit system, and then reduce the control difficulty of the circuit system, help to promote the precision and reliability of the circuit control, and then, the invention sets up the link of at least two support arms to form the second static contact, the second static contact is configured to connect electrically with the load, it can be understood that, when the power supply is electrically connected with any one of the first fixed contacts through any one of the movable contacts, the current flows to the second fixed contact through the movable contact electrically connected with the power supply, and then flows to other movable contacts, the second fixed contact is electrified, and then the load connected with the second fixed contact is electrified, so that the number of controllable loads of the change-over switch is further increased, and more loads can be controlled by one change-over switch, and the rotating bracket of the invention has the movable contact and the fixed contact at the same time, namely the rotating bracket has the functions of connecting the power supply and the load, and the using function of the rotating bracket is enriched, finally, at least two support arms are arranged at the connecting end and are mutually separated at the free end, so that the rotating bracket forms a whole, and the driving component drives any position of the rotating bracket to rotate, the supporting arms rotate synchronously, and the supporting arms have better consistency and cooperativity, so that the on-off of different circuits can be controlled, the control difficulty is reduced, and the control accuracy and reliability are improved.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic top view of a transfer switch according to an embodiment of the present invention, wherein the rotatable bracket is in a first position;

FIG. 2 is a schematic top view of the transfer switch of one embodiment of the present invention, wherein the rotating bracket is in a second position;

FIG. 3 is a schematic top view of the transfer switch of an embodiment of the present invention, wherein the rotating bracket is in a third position;

FIG. 4 is a schematic structural view of the drive assembly according to one embodiment of the present invention, wherein the first piston rod is in a first position;

FIG. 5 is a schematic structural view of the drive assembly according to one embodiment of the present invention, wherein the first piston rod is in the second position;

FIG. 6 is a schematic structural view of the drive assembly according to one embodiment of the present invention, wherein the first piston rod is in a third position;

fig. 7 is a schematic diagram of the circuit system according to an embodiment of the invention.

In the figure: 100. a transfer switch; 110(A/B), a first static contact; 120. rotating the bracket; 121(A/B), a support arm; 122. a second fixed contact; 123(A/B), a moving contact; 130. a drive assembly; 131. a transmission member; 132. a drive member; 1321. a cylinder; 13211A, a first lumen; 13211B, a second chamber; 13212. a partition plate; 13213. a stopper; 1322. a first piston rod; 1323. a second piston rod; 1324. a first valve; 1325. a second valve; 1326. a third valve; 140. an insulator; 141. a rotatable insulator; 150. a mounting seat;

200. circuitry; 210A, a first traction transformer; 210B, a second traction transformer; 210C, a third traction transformer; 220A, a first power supply; 220B, a second power supply; 230. and (4) switching.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be described in further detail with reference to examples.

Example 1

As shown in fig. 1, 2 and 3, the present invention provides a transfer switch 100, the transfer switch 100 including: at least two first fixed contacts 110(A/B), a rotating bracket 120 and a driving assembly 130.

Specifically, at least two first fixed contacts 110(a/B) (the first fixed contacts 110(a/B) may be understood with reference to the first fixed contact 110A and the first fixed contact 110B in fig. 1, 2, and 3, and will not be described herein again), respectively, configured to be electrically connected to a load, the rotating bracket 120 has at least two arms 121(a/B) (the arms 121(a/B) may be understood with reference to the arms 121A and 121AB in fig. 1, 2, and 3, and will not be described herein again), the arms 121(a/B) have opposite connection ends and free ends, the at least two arms 121(a/B) are connected at the connection ends and separated at the free ends, the connection ends are formed as second fixed contacts 122, and the free end of each arm 121(a/B) is formed as a moving contact 123(a/B) (the moving contact 123(a/B) may be formed as moving contacts 123(a/B) in fig. 1, The moving contact 123A and the moving contact 123B in fig. 2 and fig. 3 are understood, and will not be described again, the second stationary contact 122 is configured to be electrically connected to a load, the moving contact 123(a/B) is configured to be electrically connected to a power supply, and the driving assembly 130 drives the rotating bracket 120 to rotate, so that the first stationary contact 110(a/B) and the moving contact 123(a/B) are electrically connected in a one-to-one correspondence manner (specifically, refer to fig. 2 for understanding), or at least a part of the first stationary contact 110(a/B) and the moving contact 123(a/B) are disconnected (specifically, refer to fig. 1 and fig. 3 for understanding).

In this embodiment, the rotating bracket 120 is provided with at least two support arms 121(a/B), free ends of the at least two support arms 121(a/B) are respectively formed as moving contacts 123(a/B), and a connection end of the at least two support arms 121(a/B) is formed as a second fixed contact 122, first, compared with the scheme of converting a single-blade rotating control circuit, in this embodiment, the rotating bracket 120 has at least two support arms 121(a/B), and each support arm 121(a/B) can also be understood as a blade, so that the driving component 130 is controlled to drive the rotating bracket 120 to rotate, so that the first fixed contacts 110(a/B) and the moving contacts 123(a/B) are electrically connected in a one-to-one correspondence manner, and thus the current of the power supply flows to each load through each moving contact 123(a/B) and each fixed contact of the switch 100, that is, in this embodiment, by controlling the rotation of the rotating bracket 120, the power supply supplies power to a plurality of load circuits through the rotating bracket 120 at the same time, so as to implement simultaneous energization of a plurality of loads, and secondly, the embodiment can also control the driving component 130 to drive the rotating bracket 120 to rotate, so as to cause at least part of the first fixed contact 110(a/B) and the movable contact 123(a/B) to be dislocated and disconnected, so as to cause the first fixed contact 110(a/B) disconnected from the movable contact 123(a/B) to be disconnected from the power supply, so as to cause the first fixed contact 110(a/B) disconnected from the movable contact 123(a/B) to pause working, thereby implementing isolation or removal of a part of the load, in comparison with a scheme in which different circuits are respectively provided with independent switches 230 to control on and off, the embodiment implements simultaneous conduction control of a plurality, or parts of a plurality of circuits are disconnected, on one hand, the transfer switch 100 provided in this embodiment is simple in structure and easy to implement, on the other hand, the transfer switch 100 provided in this embodiment can reduce the number of switches 230 in the circuit system 200, simplify the structure of the circuit system 200, and further reduce the control difficulty of the circuit system 200, and is beneficial to improving the precision and reliability of circuit control, and then, the present embodiment is provided with at least two connecting ends of the support arms 121(a/B) to form second fixed contacts 122, and the second fixed contacts 122 are configured to be electrically connected with a load, it can be understood that, when a power supply is electrically connected with any one of the first fixed contacts 110(a/B) through any one of the moving contacts 123(a/B) electrically connected with the power supply, current flows to the second fixed contacts 122 through the moving contacts 123(a/B) electrically connected with the power supply, and then, the second fixed contact 122 is powered, so that the load connected to the second fixed contact 122 is powered, thereby further increasing the number of controllable loads of the transfer switch 100, and realizing that one transfer switch 100 can control more loads, and the rotating bracket 120 of the present embodiment has both a moving contact and a fixed contact, that is, the rotating bracket 120 has both a power supply connection function and a load connection function, thereby enriching the use functions of the rotating bracket 120, and finally, the present embodiment is provided with at least two support arms 121(a/B) connected at the connection end and separated at the free end, so that the rotating bracket 120 forms an integral body, the driving component 130 drives the rotating bracket 120 to rotate at any position, thereby enabling the support arms 121(a/B) to rotate synchronously, and the support arms 121(a/B) have better consistency and cooperativity, thereby being beneficial to control on and off of different circuits, the control difficulty is reduced, and the control precision and reliability are improved.

It should be noted that the number of the first fixed contacts 110(a/B) and the number of the support arms 121(a/B) of the rotating bracket 120 are not specifically limited in the present invention, and those skilled in the art can design the number of the first fixed contacts 110(a/B) and the number of the support arms 121(a/B) of the rotating bracket 120 according to specific requirements, for example, the change-over switch 100 is designed to have two, three, five, etc. first fixed contacts 110(a/B), or the number of the support arms 121(a/B) of the rotating bracket 120 is designed to be two, three, five, etc., which are not listed herein.

The number of the first fixed contacts 110(a/B) and the number of the support arms 121(a/B) of the rotating bracket 120 may be the same or different.

For example, in some embodiments, the number of the first fixed contacts is greater than the number of the arms of the rotating bracket 120, for example, in a specific embodiment, the transfer switch 100 has three first fixed contacts, each of the three first fixed contacts is configured to be electrically connected to a load, the rotating bracket 120 has two arms, one of the two arms is configured to be electrically connected to a power supply, the driving component 130 drives the rotating bracket 120 to rotate, so that the free ends of the two arms are connected to any adjacent two of the three first fixed contacts in a one-to-one correspondence manner, that is, the moving contacts of the two arms are electrically connected to any adjacent two of the three first fixed contacts in a one-to-one correspondence manner, the other of the three first fixed contacts is disconnected from the moving contact, the second fixed contact 122 is powered, the load connected to the second fixed contact 122 is powered, the power supply is implemented to the three loads, and the, the driving component 130 can also drive the rotating support 120 to rotate, so that the free end of any one support arm is correspondingly connected with any one of the three first fixed contacts one by one, that is, the movable contact of any one support arm is correspondingly and electrically connected with any one of the three first fixed contacts, the other two of the three first fixed contacts are disconnected with the movable contact, the second fixed contact 122 is powered on, and the load connected with the second fixed contact 122 is powered on, so that the power supply supplies power to two loads, and the other two loads are controlled to be powered off, and the driving component 130 can also drive the rotating support 120 to rotate, so that the free end of each support arm is disconnected with each first fixed contact, that is, the movable contact of each support arm is disconnected with each first fixed contact, and the second fixed contact 122 is in an open circuit, so that all loads are.

In other embodiments, the number of the first fixed contacts may also be designed to be smaller than the number of the support arms of the rotating support 120 or the number of the first fixed contacts may be designed to be equal to the number of the support arms of the rotating support 120, and the operation principle of the change-over switch 100 is similar to the above example, and will not be described herein again.

As can be understood by those skilled in the art, in the transfer switch 100 provided by the present invention, the circuits connected to the first fixed contact 110(a/B) and the movable contact 123(a/B) are switchable, that is, those skilled in the art may also design that the first fixed contact 110(a/B) and the second fixed contact 122 are respectively configured to be electrically connected to a power supply, the movable contact 123(a/B) is configured to be electrically connected to a load, and the operating principle of the transfer switch 100 is similar to that of the above example, and will not be described herein again.

In some embodiments, the distance between each first fixed contact 110(a/B) and the second fixed contact 122 is equal to or less than the length of the arm 121(a/B), which is beneficial to ensure the connection reliability between the movable contact 123(a/B) and the first fixed contact 110 (a/B).

Further, at least two first fixed contacts 110(a/B) are arranged at intervals along the circumferential direction of the second fixed contact 122. Thus, by controlling the transfer switch 100 to rotate with the first fixed contact 110(a/B) as a rotation base point, switching of the control circuit can be realized, and the control is simpler.

For example, the arms 121(A/B) between adjacent arms are V-shaped and U-shaped.

For example, the included angle a between adjacent arms 121(a/B) ranges from 30 degrees to 90 degrees.

Further, the included angle a between the adjacent arms 121(a/B) ranges from 40 degrees to 80 degrees.

Furthermore, the included angle a between the adjacent arms 121(a/B) ranges from 50 degrees to 70 degrees.

Preferably, the angle a between adjacent arms 121(A/B) is 60 degrees.

Suitable contained angle a is favorable to reasonable control to rotate the turned angle of support 120, reduces drive assembly 130's the drive degree of difficulty to and be favorable to promoting drive assembly 130's drive precision.

Example 2

On the basis of the above embodiment 1, the present embodiment further defines that the transfer switch 100 further includes a plurality of insulators 140.

Specifically, the connecting end of the rotating bracket 120 is disposed on one of the insulators 140, and the at least two first fixed contacts 110(a/B) are disposed on the remaining insulators 140 one by one. The insulators 140 have a good insulating effect, the insulators 140 are used for protecting the transfer switch 100, the working reliability of the transfer switch 100 is guaranteed, the application scene of the transfer switch 100 is expanded, and the connecting end where the rotating support 120 is arranged on one of the insulators 140, so that the insulators 140 can form insulating protection on the rotating support 120, the insulators 140 can be prevented from obstructing the rotation of the rotating support 120, and the rotating support 120 can rotate more smoothly.

Further, the insulator 140 is a high voltage insulator 140, so that the transfer switch 100 can be applied in a high voltage working scenario.

For example, the insulator 140 is a silicon rubber insulator 140.

Further, the insulator 140 connected to the rotating bracket 120 is a rotatable insulator 141, the driving unit 130 is connected to the rotatable insulator 141, and the driving unit 130 rotates by driving the rotatable insulator 141, so that the rotating bracket 120 rotates. Thus, on one hand, the insulator 140 has an insulating effect and a transmission effect, so that one object has multiple purposes, and on the other hand, the insulator 140 is used as a transmission part between the driving component 130 and the rotating bracket 120, so that the insulator 140 can form good insulation protection for the driving component 130, the driving component 130 is prevented from being broken down by high voltage, the working reliability of the driving component 130 is ensured, and a relatively conventional driver can be selected for the driving component 130, so that the cost is reduced.

Example 3

As shown in fig. 4, 5 and 6, on the basis of any one of the above embodiments, the present embodiment further defines that the driving assembly 130 includes a transmission member 131 and a driving member 132.

Specifically, the transmission member 131 is connected to the rotating bracket 120, the driving member 132 is connected to the transmission member 131, and the driving member 132 drives the transmission member 131 to move, so that the transmission member 131 drives the rotating bracket 120 to rotate.

For example, the transmission member 131 includes a gear connected to the rotatable insulator 141, the driving member 132 is connected to the gear, and the driving member 132 drives the gear to rotate, so that the gear drives the rotatable insulator 141 to rotate, thereby achieving the rotation of the rotating bracket 120.

Of course, those skilled in the art can design the transmission member 131 into other structural forms according to specific requirements, which are not illustrated.

Further, the driver 132 comprises a cylinder 1321, a first piston rod 1322 and a second piston rod 1323.

Specifically, the cylinder 1321 has a cavity, a partition plate 13212 is disposed in the cavity, the partition plate 13212 partitions the cavity to form a first cavity 13211A and a second cavity 13211B, the first piston rod 1322, a portion of the first piston rod 1322 extends into the first cavity 13211A and is configured to be movable between a first position, a second position, and a third position in the first cavity 13211A, the third position is located between the first position and the second position, a portion of the first piston rod 1322 outside the first cavity 13211A is connected to the transmission member 131, when the first piston rod 1322 moves to the first position or the second position, a portion of the first stationary contact 110(a/B) is disconnected from the movable contact 123(a/B), when the first piston rod moves to the third position, the first stationary contact 110(a/B) and the movable contact 123(a/B) are electrically connected in a one-to-one correspondence, the second piston rod 1323, a portion of the second piston rod 1323 extends into the second cavity 13211B, another portion extends into the first chamber 13211A and the second piston rod 1323 is configured to be movable within the second chamber 13211B to push the first piston rod 1322 to the third position. Thus, the movement of the driving element 132 has a relatively fixed stroke, and further the movement of the driving element 132 driving the transmission element 131 also has a relatively fixed stroke, thereby realizing the relatively fixed rotation angle of the rotating bracket 120, which is beneficial to simplifying the control logic of the driving element 132, reducing the control difficulty of the driving element 132, improving the control precision of the driving element 132, further improving the precision of the rotation position of the rotating bracket 120, realizing the alignment precision between the movable contact 123(a/B) and the first fixed contact 110(a/B), and realizing the precision of circuit switching control.

The transfer switch 100 having two first fixed contacts and two support arms is explained in detail below.

As shown in fig. 1, 2 and 3, the first stationary contact 110A, the first stationary contact 110B and the second stationary contact 122 are respectively configured to be electrically connected to a load, and one of the movable contacts 123A and 123B is electrically connected to a power supply. It can be understood that the rotating bracket 120 of the present embodiment has at least 3 operating states, wherein as shown in fig. 1, the driving component drives the rotating bracket 120 to rotate, so that the moving contact 123A is disconnected from the first fixed contact 110A and the first fixed contact 110B, the moving contact 123B is electrically connected to the first fixed contact 110A, at this time, the circuit is turned on, the current of the power supply flows to the first fixed contact 110A and the second fixed contact 122 through the moving contact 123B, and the first fixed contact 110B is disconnected; as shown in fig. 2, the driving assembly drives the rotating bracket 120 to rotate, so that the moving contact 123A is electrically connected to the first fixed contact 110A, the moving contact 123B is electrically connected to the first fixed contact 110B, at this time, the circuit is turned on, the current of the power supply flows to the first fixed contact 110A, the first fixed contact 110B and the second fixed contact 122, and the three loads operate simultaneously; as shown in fig. 3, the driving assembly drives the rotating bracket 120 to rotate, so that the movable contact 123B is disconnected from the first fixed contact 110A and the first fixed contact 110B, the movable contact 123A is electrically connected to the first fixed contact 110B, at this time, the circuit is turned on, the current of the power supply flows to the first fixed contact 110B and the second fixed contact 122 through the movable contact 123A, and the first fixed contact 110A is disconnected.

In order to achieve the above-mentioned precise control of the rotation angle of the rotating bracket 120, the driving member 132 of the present embodiment includes a first piston rod 1322 and a second piston rod 1323, specifically, the air cylinder 1321 has two air inlets at a position corresponding to the first cavity 13211A, and the air cylinder 1321 has one air inlet at a position corresponding to the second cavity 13211B, and each air inlet is respectively provided with a valve for controlling the opening or closing of the air inlet, and the control of the air inlet of each air inlet is achieved by controlling the valve. A piston is provided at the end of each piston rod as will be appreciated by those skilled in the art. In the first cavity 13211A, an end of the first piston rod 1322 is located between the two intake ports, and the first piston rod 1322 can move between the two intake ports, further, a stop member 13213 is respectively arranged at a position between the two intake ports, which is close to the two intake ports, the first piston rod 1322 can move between the two stop members 13213, and the stop member 13213 forms a stop and a limit for the movement of the first piston rod 1322, so that the situation that the first piston rod 1322 cannot intake air due to excessive movement of the first piston rod 1322 is avoided, and the cylinder 1321 fails. Specifically, as shown in fig. 4, the first valve 1324 is controlled to be opened, and the second valve 1325 and the third valve 1326 are controlled to be closed, so that the inlet air corresponding to the first valve 1324 is introduced, and the gas pushes the first piston rod 1322 to move to the first position, at this time, the first piston rod 1322 drives the transmission member 131 to move to the first position, and the transmission member 131 drives the rotating bracket 120 to move to the position shown in fig. 1; as shown in fig. 5, the third valve 1326 is controlled to be opened, and the first valve 1324 and the second valve 1325 are controlled to be closed, so that the inlet air corresponding to the third valve 1326 is supplied, the gas pushes the second piston rod 1323 to move, the second piston rod 1323 moves to push the first piston rod 1322 to the second position, at this time, the first piston rod 1322 drives the transmission member 131 to move to the second position, and the transmission member 131 drives the rotating bracket 120 to move to the position shown in fig. 2; as shown in fig. 6, the second valve 1325 is controlled to open, and the first valve 1324 and the third valve 1326 are controlled to close, so that the inlet air corresponding to the second valve 1325 is introduced, and the gas pushes the first piston rod 1322 to the third position, at this time, the first piston rod 1322 drives the transmission member 131 to move to the third position, and the transmission member 131 drives the rotating bracket 120 to move to the position shown in fig. 3.

For example, the valve is a solenoid valve.

Example 4

On the basis of any one of the above embodiments, the present embodiment further defines that the transfer switch 100 further includes a mounting seat 150.

Specifically, the mounting base 150 has two opposite surfaces, at least two first fixed contacts 110(a/B) and the rotating bracket 120 are disposed on one surface of the mounting base 150, and the driving assembly 130 is disposed on the other surface of the mounting base 150. Thus, the at least two first fixed contacts 110(a/B) and the rotating bracket 120 are separated from the driving assembly 130 by the mounting base 150, so that the driving assembly 130 is prevented from interfering with the rotation of the rotating bracket 120, and the smoothness and reliability of the rotation of the rotating bracket 120 are ensured.

In one embodiment, the at least two first fixed contacts 110(a/B), the plurality of insulators 140 and the rotating bracket 120 are disposed on one side of the mounting base 150, and the driving assembly 130 is disposed on the other side of the mounting base 150.

By way of example, mount 150 comprises a mounting plate.

On the basis of any of the above embodiments, the present embodiment further defines that at least two arms 121(a/B) of the rotating bracket 120 are of an integrated structure. For example, the at least two arms 121(a/B) of the rotating bracket 120 are formed as an integral structure, or the at least two arms 121(a/B) of the rotating bracket 120 are connected by welding.

On the basis of any of the above embodiments, the present embodiment further defines that the driving assembly 130 includes a motor, a cylinder 1321 or a hydraulic cylinder.

Example 5

As shown in fig. 7, the present embodiment provides a circuit system 200 for a railway power supply system, and the circuit system 200 includes a transfer switch 100, a plurality of loads, and a power supply.

The transfer switch 100 is the transfer switch 100 in any of the above embodiments.

One of the plurality of loads is electrically connected to the second stationary contact 122 of the transfer switch 100, the remaining loads are electrically connected to the first stationary contacts 110(a/B) of the transfer switch 100 in a one-to-one correspondence, and the power supply is electrically connected to the moving contacts 123(a/B) of the transfer switch 100.

The present embodiment is provided with the change-over switch 100 described in any of the above embodiments, so as to have all the above beneficial effects, which are not described herein again.

Example 6

On the basis of the above embodiments, the present embodiment further defines that a switch 230 is disposed between the second fixed contact 122 and the load connected thereto, and the switch 230 controls the second fixed contact 122 and the load connected thereto to be turned on or off. The independent switch 230 is used to realize the control of the switching or isolation of the load connected to the second stationary contact 122, and the control is simpler.

Example 7

On the basis of any of the above embodiments, the present embodiment further defines that the power supply includes a first power supply 220A and a second power supply 220B, the first power supply 220A and the second power supply 220B are electrically connected to the movable contact 123(a/B) in a one-to-one correspondence, and the first fixed contact 110(a/B) and the second fixed contact 122 are configured to be capable of being powered by the first power supply 220A or the second power supply 220B. The multiple moving contacts 125(a/B) of the transfer switch 100 of the present invention are fully utilized to achieve a richer circuit layout by providing two power sources.

Example 8

On the basis of any of the above embodiments, the present embodiment further defines that the plurality of loads include a first traction transformer 210A, a second traction transformer 210B, and a third traction transformer 210C, the first traction transformer 210A and the third traction transformer 210C are electrically connected to the first stationary contact 110(a/B) in a one-to-one correspondence, and the second traction transformer 210B is electrically connected to the second stationary contact 122; the power source is electrically connected to the movable contact 125(a/B), wherein the driving assembly 130 of the transfer switch 100 drives the rotating bracket 120 to rotate, such that the first traction transformer 210A, the second traction transformer 210B, and the third traction transformer 210C are respectively supplied with power from the power source, or such that one of the first traction transformer 210A and the third traction transformer 210C is disconnected from the power source.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.