CN112563049B

CN112563049B - Change-over switch and circuit system

Info

Publication number: CN112563049B
Application number: CN202010515902.4A
Authority: CN
Inventors: 许万涛; 王天宇; 侯小强; 谢立军; 迟鹏飞
Original assignee: CRRC Qingdao Sifang Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2024-03-22
Anticipated expiration: 2040-06-08
Also published as: CN112563049A

Abstract

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 bracket is provided with at least two support arms, the support arms are provided with opposite connecting ends and free ends, the at least two support arms are connected at the connecting ends and mutually separated at the free ends, the connecting ends are formed into second fixed contacts, the free ends of each support arm are formed into moving contacts, the second fixed contacts are configured to be electrically connected with a load, and the moving contacts are configured to be electrically connected with a power supply; the driving assembly drives the rotating support to rotate, so that the first fixed contacts and the moving contacts are electrically connected in one-to-one correspondence, or at least part of the first fixed contacts and the moving contacts are disconnected. According to the invention, a plurality of circuits are controlled to be simultaneously conducted or a plurality of circuits are partially disconnected through one change-over switch, so that the number of switches of a circuit system is reduced, the structure of the circuit system is simplified, the control difficulty of the circuit system is reduced, and the control accuracy of the circuit is improved.

Description

Change-over switch and circuit system

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 running requirements of domestic urban rail vehicles, the requirements on vehicle performance and configuration are correspondingly improved. When three traction transformers are configured on the vehicle, the single transformer is required to be timely and effectively cut off under the fault condition, so that the train maintains the residual power to continue to run. If a plurality of vacuum circuit breakers or a plurality of two-potential high-voltage isolating switches are adopted for cutting, firstly, the cost is high, and secondly, the occupied space is large and the air supply and control are complex.

The present invention has been made in view of this.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a switch for controlling the switching or isolation of a plurality of circuits so as to realize the simultaneous operation of the circuits or the partial disconnection of the circuits.

In order to achieve the object, according to one aspect of the present invention, the following technical solutions are adopted:

a transfer switch, comprising:

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

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

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

In the above technical scheme, the change-over switch further includes:

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

In the above technical scheme, the insulator connected with the rotating bracket 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 bracket rotates.

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

the transmission piece is connected with the rotating bracket;

the driving piece is connected with the transmission piece and drives the transmission piece to move, so that the transmission piece drives the rotating bracket 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 partition plate divides the cavity into a first cavity and a second cavity;

the first piston rod stretches into the first cavity, and is configured to move among a first position, a second position and a third position in the first cavity, 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 piece, when the first piston rod moves to the first position or the second position, part of the first fixed contact is disconnected with the moving contact, and when the first piston rod moves to the third position, the first fixed contact is electrically connected with the moving contact in a one-to-one correspondence manner;

a second piston rod, a portion of which extends into the second cavity and another portion of which extends into the first cavity, the second piston rod being 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 seat is provided with two opposite surfaces, at least two first fixed contacts and the rotating support are arranged on one surface of the mounting seat, and the driving assembly is arranged on the other surface of the mounting seat;

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

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

In order to achieve the object, according to another aspect of the present invention, the following technical solutions are adopted:

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

a transfer switch as described in any one of the above aspects;

the plurality of loads are 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 contact of the change-over switch in a one-to-one correspondence manner;

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

In any of the above technical solutions, a switch is provided between the second stationary contact and the load connected with the second stationary contact, and the switch controls the second stationary contact to be closed or opened with the load connected with the second stationary contact.

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

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

the power supply is electrically connected with the moving contact, wherein the driving component of the change-over switch drives the rotating bracket 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 the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects:

in the invention, the rotating bracket is provided with at least two support arms, the free ends of the at least two support arms are respectively formed into moving contacts, the connecting ends of the at least two support arms are formed into second fixed contacts, firstly, compared with the scheme of single-switch knife rotating control circuit conversion, the rotating bracket is provided with at least two support arms, each support arm can also be understood as a switch knife, in this way, the driving component is controlled to drive the rotating bracket to rotate, so that the first fixed contacts are electrically connected with the moving contacts in a one-to-one correspondence manner, the current of a power supply flows to each load through each moving contact and the fixed contacts of the change-over switch, namely, the invention can realize simultaneous power supply to a plurality of load circuits through controlling the rotation of the rotating bracket, so that a plurality of loads are electrified simultaneously, secondly, the driving component can also be controlled to drive the rotating bracket to rotate, so that at least part of the first fixed contacts are dislocated with the moving contacts to be disconnected, and the first fixed contacts disconnected with the moving contacts are disconnected with the power supply to stop working, the isolation or the removal of the part of the loads are realized, thus the number of the two-switch-on-off circuit can be easily reduced, the invention can realize the accurate control of the change-over system is realized, on the one side, the invention is easy to realize the number of the change-off control system is reduced, and the number of the change-over system is further realized, the switching system is easily, and the number of the two-on the control system is easily is controlled to realize, and the change-off system is respectively, and the switching circuit is realized through the switching system is simultaneously through the control system is simultaneously, and the switching circuit is realized through the switching and the switching on and the switching system, the second fixed contact is configured to be electrically connected with a load, and it can be understood that when a power supply is electrically connected with any one first fixed contact through any one moving contact, current flows to the second fixed contact through the moving contact electrically connected with the power supply and then flows to other moving contacts, the second fixed contact is electrified, so that loads connected with the second fixed contact are electrified, connection points are further increased, the number of loads controllable by a change-over switch is further increased, more loads can be controlled by the change-over switch, the rotating support simultaneously has the moving contact and the fixed contact, namely, the rotating support has the function of connecting the power supply and the loads, the use function of the rotating support is enriched, finally, at least two support arms are connected at a connecting end and are mutually separated at a free end, the rotating support is formed into a whole, a driving assembly drives any position of the rotating support to rotate, so that the support arms synchronously rotate, the support arms have better consistency and synergy, the difficulty between different circuits is favorable for controlling on-off, the control is reduced, and the control accuracy and reliability are improved.

The following describes the 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 and 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. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:

FIG. 1 is a schematic top view of a switch according to an embodiment of the present invention, wherein a rotating bracket is located at a first position;

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

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

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

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

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

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

In the figure: 100. a change-over switch; 110 (A/B), a first stationary contact; 120. rotating the bracket; 121 (A/B), support arm; 122. a second stationary contact; 123 (A/B), moving contact; 130. a drive assembly; 131. a transmission member; 132. a driving member; 1321. a cylinder; 13211A, a first lumen; 13211B, a second lumen; 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 base;

200. a circuit system; 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 (3) a switch.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific 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 explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill 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 comprising: at least two first stationary contacts 110 (a/B), a rotating bracket 120, and a drive assembly 130.

Specifically, at least two first static contacts 110 (a/B) (the first static contacts 110 (a/B) may be understood with reference to fig. 1, 2, and 3, and the first static contacts 110A and 110B will not be described later), each of which is 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 fig. 1, 2, and 3, and the arms 121AB will not be described later), the arms 121 (a/B) have opposite connection ends and free ends, at least two arms 121 (a/B) are connected to each other at the connection ends and separated from each other at the free ends, the connection ends are formed as second static contacts 122, the free ends of each arm 121 (a/B) are formed as moving contacts 123 (a/B) (the moving contacts 123 (a/B) may be understood with reference to fig. 1, 2, and 3, and the moving contacts 123 (a/B) will not be described later), the second static contacts 122 are configured to be electrically connected to the first support (a/B) and the rotating bracket 110 (a/B) to be configured to be electrically connected to a specific power source (130) to be understood with reference to the rotating assembly (130), or to disconnect at least part of the first stationary contact 110 (a/B) from the moving contact 123 (a/B) (as can be understood in particular with reference to fig. 1 and 3).

In this embodiment, the rotating bracket 120 is provided with at least two support arms 121 (a/B), the free ends of the at least two support arms 121 (a/B) are respectively formed into moving contacts 123 (a/B), the connecting ends of the at least two support arms 121 (a/B) are formed into second fixed contacts 122, firstly, compared with the scheme of switching by a single-blade rotating control circuit, the rotating bracket 120 of this embodiment has at least two support arms 121 (a/B), each support arm 121 (a/B) can be understood as a blade, in this way, the driving component 130 is controlled to drive the rotating bracket 120 to rotate, so that the first fixed contact 110 (a/B) is electrically connected with the moving contact 123 (a/B) 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 the fixed contact of the switch 100, that is, by controlling the rotation of the rotating bracket 120, the power supply is simultaneously supplied to a plurality of load circuits, so that a plurality of loads are simultaneously electrified, secondly, the embodiment can also control the driving component 130 to rotate, so that the driving component 130 is controlled to disconnect at least one moving contact 123 (a/B) from the moving contact 123) and the moving contact 123 (a/B) is disconnected from the moving contact 123) in a one-to the moving contact 110 (a/B), in this way, compared with the scheme that independent switches 230 are respectively arranged on different circuits to control on-off, in the embodiment, the on-off of a plurality of circuits is controlled simultaneously by one change-over switch 100, or the part of the circuits is disconnected, on the one hand, the change-over switch 100 provided by the embodiment is simple in structure and easy to implement, on the other hand, the change-over switch 100 of the embodiment can reduce the number of the switches 230 in the circuit system 200, simplify the structure of the circuit system 200, further reduce the control difficulty of the circuit system 200, be beneficial to improving the accuracy and reliability of circuit control, and on the other hand, the embodiment is provided with the second fixed contact 122 formed by the connection ends of at least two support arms 121 (A/B), the second fixed contact 122 is configured to be electrically connected with the load, it can be understood that, when the 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), the current flows to the second fixed contact 122 through the moving contact 123 (a/B) electrically connected with the power supply, and then flows to other moving contacts 123 (a/B), the second fixed contact 122 gets electricity, and then the load connected with the second fixed contact 122 gets electricity, so that the connection point is further increased, the number of loads controllable by the change-over switch 100 is further increased, and more loads can be controlled by one change-over switch 100, and the rotating support 120 in this embodiment has both the moving contact and the fixed contact, that is, the rotating support 120 has the function of connecting the power supply and the load, so that the use function of the rotating support 120 is enriched, and is finally, in this embodiment, at least two support arms 121 (a/B) are connected at the connection end and separated from each other at the free end, so that the rotating bracket 120 is formed into a whole, the driving component 130 drives the rotating bracket 120 to rotate at any position, so that each support arm 121 (a/B) rotates synchronously, and each support arm 121 (a/B) has better consistency and synergy, thereby being beneficial to controlling the on-off of different circuits, reducing the control difficulty and improving the control accuracy and reliability.

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

The number of the first fixed contacts 110 (a/B) and the number of the 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 static contacts is designed to be greater than the number of the support arms of the rotating support 120, for example, in one specific embodiment, the change-over switch 100 is provided with three first static contacts, the three first static contacts are respectively configured to be electrically connected with the load, the rotating support 120 is provided with two support arms, one of the two support arms is configured to be electrically connected with the power supply, the driving component 130 drives the rotating support 120 to rotate, so that the free end of the two support arms is correspondingly connected with any adjacent two of the three first static contacts, namely, the moving contact of the two support arms is correspondingly electrically connected with any adjacent two of the three first static contacts, namely, the other one of the three first static contacts is disconnected with the moving contact, the second static contact 122 is electrically connected with the moving contact, the load connected with the second static contact 122 is electrically disconnected, the power supply is supplied to the three load, the power supply is disconnected from the other load, the power supply is also can be supplied to the driving component 130 to drive the rotating support 120, so that the free end of any one of the support arm is correspondingly connected with any adjacent two static contacts, namely, the two moving contacts of the first static contacts are electrically disconnected from the first static contacts are electrically connected with the first static contacts 122, the power is electrically disconnected from the moving contact, and the moving contact is electrically disconnected from the moving contact 122.

In other embodiments, the number of the first fixed contacts may be smaller than the number of the arms of the rotating bracket 120 or the number of the first fixed contacts may be equal to the number of the arms of the rotating bracket 120, and the operation principle of the switch 100 is similar to that of the above example and will not be repeated here.

It can be appreciated by those skilled in the art that, in the transfer switch 100 provided by the present invention, the circuits to which the first fixed contact 110 (a/B) and the moving contact 123 (a/B) are connected are switchable, that is, those skilled in the art may 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 according to specific requirements, the moving contact 123 (a/B) is configured to be electrically connected to a load, and the working principle of the transfer switch 100 is similar to that of the above example and will not be repeated herein.

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

Further, at least two first stationary contacts 110 (a/B) are arranged at intervals along the circumferential direction of the second stationary contact 122. Thus, the change-over switch 100 is controlled to rotate by taking the first fixed contact 110 (A/B) as a rotation base point, so that the switching of a 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) can range from 30 degrees to 90 degrees.

Further, the included angle a between the adjacent arms 121 (a/B) is in the range of 40 degrees to 80 degrees.

Further, the included angle a between the adjacent arms 121 (a/B) is in the range of 50 to 70 degrees.

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

The proper included angle a is beneficial to reasonably controlling the rotation angle of the rotating bracket 120, reducing the driving difficulty of the driving assembly 130 and improving the driving accuracy of the driving assembly 130.

Example 2

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

Specifically, the connection end of the rotating bracket 120 is disposed on one of the plurality of insulators 140, and at least two first stationary contacts 110 (a/B) are disposed on the remaining insulators 140 one by one. The insulator 140 has good insulation effect, the insulator 140 is used for protecting the change-over switch 100, the working reliability of the change-over switch 100 is guaranteed, the application scene of the change-over switch 100 is expanded, the connecting end of the rotating support 120 is arranged on one of the insulators 140, and therefore the insulator 140 is used for preventing the insulator 140 from interfering the rotation of the rotating support 120 while insulating the rotating support 120, and the rotating support 120 is enabled to rotate smoothly.

Further, the insulator 140 is a high voltage insulator 140, so that the change-over switch 100 can be applied in a high voltage operation scenario.

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

Further, the insulator 140 connected to the rotating bracket 120 is a rotatable insulator 141, and the driving assembly 130 is connected to the rotatable insulator 141, and the driving assembly 130 rotates by driving the rotatable insulator 141, so that the rotating bracket 120 rotates. Thus, on one hand, the insulator 140 has the insulation function and the transmission function, so that the multiple purposes are realized, on the other hand, the insulator 140 is used as a transmission part between the driving assembly 130 and the rotating bracket 120, the insulator 140 can form good insulation protection for the driving assembly 130, the driving assembly 130 is prevented from being broken down by high voltage, the working reliability of the driving assembly 130 is ensured, and the driving assembly 130 can be a more conventional driver, 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, and 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 driving 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 realizing the rotation of the rotation bracket 120.

Of course, those skilled in the art may design the transmission member 131 into other structural forms according to specific requirements, and this is not intended to be limiting.

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

Specifically, the cylinder 1321 has a cavity, in which a partition plate 13212 is disposed, the partition plate 13212 separates 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 capable of moving 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 located outside the first cavity 13211A is connected with the transmission member 131, when the first piston rod 1322 moves to the first position or the second position, so that a portion of the first stationary contact 110 (a/B) is disconnected with the moving contact 123 (a/B), when the first piston rod 1322 moves to the third position, so that a portion of the first stationary contact 110 (a/B) is electrically connected with the moving contact 123 (a/B), a portion of the second piston rod 1323 extends into the second cavity 11B, and another portion of the second piston rod 1323 extends into the second cavity 13211B, and the other portion of the first piston rod 1323 is configured to be capable of moving into the first cavity 13211B. Thus, the motion of the driving piece 132 has a relatively fixed stroke, and the motion of the driving piece 132 driving the driving piece 131 also has a relatively fixed stroke, so that the relative fixation of the rotation angle of the rotating bracket 120 is realized, the control logic of the driving piece 132 is facilitated to be simplified, the control difficulty of the driving piece 132 is reduced, the control precision of the driving piece 132 is improved, the precision of the rotation position of the rotating bracket 120 is further improved, the alignment precision between the moving contact 123 (A/B) and the first fixed contact 110 (A/B) is realized, and the precision of circuit switching control is realized.

The following description will be given in detail taking the case where the change-over switch 100 has two first fixed contacts and two arms as examples.

As shown in fig. 1, 2 and 3, the first fixed contact 110A, the first fixed contact 110B and the second fixed contact 122 are respectively configured to be electrically connected to a load, and one of the moving contact 123A and the moving contact 123B is electrically connected to a power source. It can be appreciated that the rotating bracket 120 of the present embodiment has at least 3 working states, wherein, as shown in fig. 1, the driving assembly 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 with the first fixed contact 110A, at this time, the circuit is conducted, 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 with the first fixed contact 110A, the moving contact 123B is electrically connected with the first fixed contact 110B, at this time, a circuit is conducted, current of a power supply flows to the first fixed contact 110A, the first fixed contact 110B and the second fixed contact 122 respectively, and three loads work simultaneously; as shown in fig. 3, the driving assembly drives the rotating bracket 120 to rotate, so that the moving contact 123B is disconnected from the first fixed contact 110A and the first fixed contact 110B, the moving contact 123A is electrically connected with the first fixed contact 110B, at this time, the circuit is conducted, and the current of the power supply flows to the first fixed contact 110B and the second fixed contact 122 through the moving 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 according to this embodiment includes a first piston rod 1322 and a second piston rod 1323, specifically, the cylinder 1321 has two air inlets at a position corresponding to the first cavity 13211A, the cylinder 1321 has one air inlet at a position corresponding to the second cavity 13211B, each air inlet is respectively provided with a valve to control the opening or closing of the air inlet, and the control of the air intake of each air inlet is achieved by controlling the valve. As will be appreciated by those skilled in the art, a piston is provided on the end of each piston rod. Wherein, in the first cavity 13211A, the end portion of the first piston rod 1322 is located between two air inlets, and the first piston rod 1322 can move between the two air inlets, further, a stop piece 13213 is respectively disposed at a position between the two air inlets and close to the two air inlets, the first piston rod 1322 can move between the two stop pieces 13213, and the movement of the first piston rod 1322 by the stop piece 13213 forms a stop and limits, so that the excessive movement of the first piston rod 1322 is avoided, the air cannot be admitted, and the air cylinder 1321 fails. Specifically, as shown in fig. 4, the first valve 1324 is controlled to be opened, 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, the air pushes the first piston rod 1322 to move to the first position, at this time, the first piston rod 1322 drives the driving member 131 to move to the first position, and the driving member 131 drives the rotating bracket 120 to move to the position as shown in fig. 1; as shown in fig. 5, the third valve 1326 is controlled to be opened, the first valve 1324 and the second valve 1325 are controlled to be closed, so that inlet air corresponding to the third valve 1326 is fed, air 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 driving member 131 to move to the second position, and the driving member 131 drives the rotating bracket 120 to move to the position as shown in fig. 2; as shown in fig. 6, the second valve 1325 is controlled to be opened, the first valve 1324 and the third valve 1326 are controlled to be closed, so that the inlet air corresponding to the second valve 1325 is introduced, and the air pushes the first piston rod 1322 to the third position, at this time, the first piston rod 1322 drives the driving member 131 to move to the third position, and the driving member 131 drives the rotating bracket 120 to move to the position as shown in fig. 3.

The valve is, for example, a solenoid valve.

Example 4

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

Specifically, the mounting base 150 has two opposite sides, at least two first stationary contacts 110 (a/B) 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. Thus, at least two first stationary contacts 110 (a/B) and the rotating bracket 120 are separated from the driving assembly 130 by the mounting seat 150, which avoids the driving assembly 130 from interfering the rotation of the rotating bracket 120, and is beneficial to ensuring the smoothness and reliability of the rotation of the rotating bracket 120.

In one embodiment, at least two first stationary contacts 110 (a/B), a plurality of insulators 140 and a 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.

For example, the mount 150 comprises a mounting plate.

On the basis of any one of the above embodiments, this embodiment further defines a structure in which at least two arms 121 (a/B) of the rotating bracket 120 are integrally formed. For example, at least two arms 121 (A/B) of the rotating bracket 120 are integrally formed, or at least two arms 121 (A/B) of the rotating bracket 120 are connected by welding.

On the basis of any one 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, the circuit system 200 including a transfer switch 100, a plurality of loads, and a power source.

The change-over switch 100 is the change-over 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 load is electrically connected to the first stationary contact 110 (a/B) of the transfer switch 100 in a one-to-one correspondence, and the power supply is electrically connected to the moving contact 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 that all the above advantages are achieved, and will not be described herein.

Example 6

On the basis of the above embodiment, 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 closing or opening between the second fixed contact 122 and the load connected thereto. The independent switch 230 is used for realizing the control of switching or isolating the load connected with the second fixed contact 122, and the control is simpler.

Example 7

On the basis of any one of the above embodiments, the present embodiment further defines that the power source includes a first power source 220A and a second power source 220B, the first power source 220A and the second power source 220B are electrically connected to the moving contact 123 (a/B) in a one-to-one correspondence, and the first stationary contact 110 (a/B) and the second stationary contact 122 are configured to be capable of being powered via the first power source 220A or via the second power source 220B. With the full use of the multiple moving contacts 125 (a/B) of the transfer switch 100 of the present invention, a richer circuit arrangement is achieved by providing two power sources.

Example 8

On the basis of any one 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, where 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 with the moving contact 125 (a/B), wherein the driving assembly 130 of the change-over 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 powered by 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.

The present invention is not limited to the above embodiments, but is capable of being modified or varied in many ways, and still fall within the scope of the present invention.

Claims

1. A transfer switch, comprising:

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

3. The transfer switch of claim 2, wherein the switch comprises a switch,

the insulator that links to each other with the runing rest is rotatable insulator, drive assembly with rotatable insulator links to each other, drive assembly is through the drive rotatable insulator is rotatory for the runing rest rotates.

4. A transfer switch according to any one of claims 1 to 3, wherein the drive assembly comprises:

the transmission piece is connected with the rotating bracket;

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

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

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

a diverter switch as claimed in any one of claims 1 to 6;

8. The circuit system of claim 7, wherein the circuit system further comprises a logic circuit,

a switch is arranged between the second fixed contact and the load connected with the second fixed contact, and the switch controls the closing or opening between the second fixed contact and the load connected with the second fixed contact.

9. The circuitry according to claim 7 or 8, wherein,

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 fixed contact and the second fixed contact are configured to be capable of being powered by the first power supply or the second power supply.

10. The circuitry according to claim 7 or 8, wherein,

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 electrically connected with the first static contact in one-to-one correspondence, and the second traction transformer is electrically connected with the second static contact;