CN217444237U

CN217444237U - Dual-power transfer switch excitation driving mechanism

Info

Publication number: CN217444237U
Application number: CN202220458837.0U
Authority: CN
Inventors: 简美加; 金鑫
Original assignee: Hangzhou Zhijiang Switchgear Stock Co Ltd
Current assignee: Hangzhou Zhijiang Switchgear Stock Co Ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-09-16
Anticipated expiration: 2032-03-04

Abstract

The utility model relates to the field of electrical switches, in particular to a dual-power transfer switch excitation driving mechanism, which comprises a switch frame and a detection mechanism, wherein the switch frame is provided with a common power supply central shaft, a standby power supply central shaft, an electromagnetic mechanism, a transmission mechanism and a contact structure, the detection mechanism is used for detecting and transmitting signals and controlling the electromagnetic mechanism to operate, and the electromagnetic mechanism drives the contact structure to perform breaking operation control and realize dual-power transfer through the transmission mechanism when in operation; electromagnetic mechanism includes the support, be equipped with quiet iron core in the support and move the iron core, be equipped with in the quiet iron core and be used for controlling to move the iron core and reciprocate and the transmission shaft of adjusting. Compared with the prior art, the excitation driving mechanism of the dual-power transfer switch is reliable and quick when used, is quick when closed and broken, and is convenient for personnel to operate, so that adverse effects are difficult to generate, and the practicability of the device is improved.

Description

Dual-power transfer switch excitation driving mechanism

Technical Field

The utility model belongs to the technical field of the electrical switch and specifically relates to a dual supply change over switch excitation actuating mechanism is related to.

Background

The dual-power transfer switch is used as an inter-switching electric appliance of important loads such as military, hospitals and fire fighting, and plays an important role in the stability and the continuity of a power supply system. The electromagnetic mechanism is one of the key parts of the dual-power transfer switch, and the switching between a 'common power supply' and a 'standby power supply' of a power supply can be realized by controlling the attraction of the electromagnetic mechanism, so that the continuous power supply of a power supply system is realized. The utility model discloses according to dual power transfer switch's technical requirement, design and optimization have been carried out electromagnetic mechanism to satisfy its reliable, quick work.

Under the push of the scientific and technological revolution, electric energy has become a powerful support for the rapid advance of national science and technology. At the same time, the reliability and the persistence of the power supply system are also increasingly required, for example, in airports, hospitals, high buildings, fire fighting and important military bases, with serious consequences in case of a power failure. Therefore, a plurality of important sites need to be provided with a dual-power emergency power supply system for ensuring normal power supply requirements. The PC level change-over switch is generally driven by excitation, namely an electromagnet, when a detection mechanism detects that faults such as overcurrent, overvoltage, phase loss and the like occur in a common line, a signal is sent to an electromagnetic mechanism to close the electromagnet, a moving contact mechanism is driven by a transmission mechanism to break a contact, and the line is switched to a standby power supply side, so that continuous power supply of a power system is achieved. However, due to the fact that the electromagnetic mechanism directly or indirectly causes the dual-power-supply changeover switch to be incapable of being switched from the 'common power supply' to the 'standby power supply', a power failure phenomenon occurs to a primary load and a part of secondary loads in the power system. The main reasons for the failure of the electromagnetic mechanism are as follows: on one hand, if the electromagnetic attraction generated by the electromagnetic mechanism is insufficient, the normal closing and breaking of the change-over switch can be directly influenced; on the other hand, if the action time of the electromagnetic mechanism is too slow, the electric arc generated in the breaking process of the contact can not be extinguished in time, the contact is burnt, and the fault of the change-over switch is indirectly caused. Therefore, it is very important that the dual-power transfer switch has a reliable and fast electromagnetic mechanism, which will affect whether the transfer switch can be successfully closed and disconnected, and thus affect the stability of the power system.

Disclosure of Invention

Technical problem to be solved

The utility model provides a to prior art not enough, the utility model provides a dual supply change over switch excitation actuating mechanism has solved the problem of proposing in the above-mentioned background art.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a dual-power transfer switch excitation driving mechanism comprises a switch frame and a detection mechanism, wherein a common power supply central shaft, a standby power supply central shaft, an electromagnetic mechanism, a transmission mechanism and a contact structure are arranged on the switch frame, the detection mechanism is used for detecting and transmitting signals and controlling the electromagnetic mechanism to operate, and the electromagnetic mechanism drives the contact structure to perform breaking operation control and realize dual-power transfer through the transmission mechanism during operation; electromagnetic mechanism includes the support, be equipped with quiet iron core in the support and move the iron core, be equipped with in the quiet iron core and be used for controlling to move the iron core and reciprocate and the transmission shaft of adjusting. The movable iron core is an important component of an electromagnetic system, the electromagnetic system converts electric energy into mechanical energy through the movement of the movable iron core, and the structural form of the electromagnetic system influences the output force characteristic of the electromagnet; the static iron core is also called as a stop iron, the existence or nonexistence of the stop iron seriously affects the output force characteristic of the electromagnet generally at the bottom of the yoke, the solenoid force generated by leakage flux of the electromagnet without the stop iron has small change, the suction characteristic is relatively flat when the air gap is large, and the suction characteristic is relatively steep when the air gap is small; the yoke plays a supporting role and provides a space for installing the excitation coil, and the function of the yoke is to strengthen the magnetic field of a working area; the excitation coil is mainly formed by tightly winding a copper wire and has the function of establishing a magnetic field by electric energy obtained from a power supply; the coil framework is generally made of insulator plastics and is used for winding the excitation coil; the return spring A is used as an energy storage element and plays a role of returning the movable iron core to the initial position after finishing the action; the transmission shaft plays the effect of adjusting the joint angle and the distance between the electromagnetic mechanism and the side moving contact, and prevents the joint failure of the contacts. The yoke is not shown in the figure. When the change-over switch works normally, the electromagnetic mechanism is in a closing state, and the circuit is connected with a normal power supply; when the common power supply has faults of short circuit, phase failure and the like, the detection mechanism sends a signal to enable the electromagnetic mechanism to enter a closing state, and the transmission mechanism drives the connected contact mechanism to enable the contact to be switched to the standby power supply side.

Preferably, be equipped with reset spring A and be located the surface of transmission shaft between quiet iron core and the movable iron core, quiet iron core and movable iron core are vertical form interval distribution from top to bottom.

Preferably, the static iron core and the outer side of the movable iron core are provided with excitation coils which are positioned through coil frameworks, and copper pipes are arranged between the coil frameworks and the static iron core.

Preferably, the transmission mechanism comprises a plurality of groups of connecting pieces, one end of each connecting piece is provided with a square shaft which rotates along the surface of the switch frame, the other end of each connecting piece is provided with a connecting shaft, one or more connecting pieces are arranged in the connecting shafts, one or more stroke limiting parts which are connected with one end part of a common power supply central shaft and one end part of a standby power supply central shaft are arranged at the top end of each connecting piece, and the top of one end of one group of connecting pieces is connected with the output end of the transmission shaft through a fixing part.

Preferably, the number of the travel limiting parts is four, and four the travel limiting parts are equally divided into two groups, wherein a lock hook is arranged between one group of the travel limiting parts, the output end of the lock hook is provided with a reset part which moves up and down and resets, and four limit parts which are connected with one end of a common power supply central shaft and one end of a standby power supply central shaft are arranged in the travel limiting parts.

Preferably, the lower part of the reset piece is provided with a reset spring B connected with the switch frame, and the clamping and fixing of the limiting part are adjusted through bolts.

Preferably, the contact structure comprises a side moving contact and a side fixed contact, the side moving contact is located above the side fixed contact, and the combination of the side moving contact and the side fixed contact is driven by a transmission mechanism.

Preferably, the side moving contact comprises a common side moving contact and a standby side moving contact, the side fixed contact comprises a common side fixed contact and a standby side fixed contact, and the bottom of the common side moving contact and the upper surface of the common side fixed contact, and the bottom of the standby side moving contact and the upper surface of the standby side fixed contact are respectively provided with a contact block which is matched with each other.

Preferably, the other end of common power supply center pin and stand-by power supply center pin all are equipped with the drive shaft and the drive shaft is located the lateral wall of switch frame.

The utility model discloses a dual supply change over switch belongs to syllogic structure, and the side moving contact is accomplished by drive mechanism's linkage in the switching of three position. The rotation of the transmission mechanism is driven by a connecting rod of the transmission mechanism, and the interlocking action of the connecting rod is driven by the attraction force generated by the electromagnetic mechanism. When the coil of the electromagnetic mechanism is electrified, the movable iron core acts, and the transmission shaft rotates to enable the contact to be in a zero position state. When the electromagnetic closing mechanism of the common power supply circuit is electrified, the moving contact of the power supply is closed frequently to connect the common power supply. When the common power circuit fails, the contact is switched to the standby power supply.

The utility model provides a dual supply change over switch excitation actuating mechanism possesses following beneficial effect:

compared with the prior art, the excitation driving mechanism of the dual-power transfer switch is reliable and quick in use, quick in closing and breaking and convenient to operate by personnel, adverse effects are difficult to generate, and the practicability of the device is improved.

Drawings

Fig. 1 is a schematic diagram of the dual power conversion of the present invention;

fig. 2 is a schematic diagram of a dual power conversion excitation driving mechanism of the present invention;

FIG. 3 is a schematic view of the contact in a zero position of the present invention;

FIG. 4 is a schematic view of the contact of the present invention in a normally closed position;

FIG. 5 is a schematic view of the contact of the present invention in a standby position;

fig. 6 is a transmission mechanism of the dual power transfer switch of the present invention;

fig. 7 shows a dual power transfer switch switching mechanism of the present invention;

fig. 8 is an enlarged schematic structural view of the present invention at C in fig. 7.

In the figure: 1. a switch frame; 2. a common power supply central shaft; 3. a standby power supply central shaft; 4. an electromagnetic mechanism; 5. a transmission mechanism; 501. connecting sheets; 502. a square shaft; 503. a connecting shaft; 504. a connecting member; 505. a travel limit; 506. a fixing member; 507. a latch hook; 508. a reset member; 6. a contact structure; 7. a support; 8. a stationary iron core; 9. a movable iron core; 10. a drive shaft; 11. a return spring A; 12. a field coil; 13. a coil bobbin; 14. a copper pipe; 15. a limiting part; 16. a return spring B; 17. a side moving contact; 1701. a common side moving contact; 1702. a standby side moving contact; 18. side static contact; 1801. a common side static contact; 1802. a spare side static contact; 19. a contact block; 20. a drive shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1 to 8, the present invention provides a technical solution: a dual-power transfer switch excitation driving mechanism comprises a switch frame 1 and a detection mechanism, wherein a common power supply central shaft 2, a standby power supply central shaft 3, an electromagnetic mechanism 4, a transmission mechanism 5 and a contact structure 6 are arranged on the switch frame 1, a drive shaft 20 is arranged at the other end of each of the common power supply central shaft 2 and the standby power supply central shaft 3, the drive shaft 20 is positioned in the side wall of the switch frame 1, the contact structure 6 comprises a side moving contact 17 and a side fixed contact 18, the side moving contact 17 is positioned above the side fixed contact 18, the combination of the side moving contact 17 and the side fixed contact 18 is driven by the transmission mechanism 5, the side moving contact 17 comprises a common side moving contact 1701 and a standby side moving contact, the side fixed contact 18 comprises a common side fixed contact 1801 and a standby side fixed contact 1802, the bottom of the common side moving contact 1701 and the upper surface of the common side fixed contact 1801, the bottom of the standby side moving contact 1702 and the upper surface of the standby side fixed contact 1802 are respectively provided with contact blocks 19 which are matched with each other, the transmission mechanism 5 comprises a plurality of groups of connecting pieces 501, one end of each connecting piece 501 is provided with a square shaft 502 which rotates along the surface of the switch frame 1, the other end of each connecting piece 501 is provided with a connecting shaft 503, one or more connecting pieces 504 are arranged in each connecting shaft 503, the top end of each connecting piece 504 is provided with one or more stroke limiting pieces 505 which are connected with one end part of a common power supply central shaft 2 and one end part of a standby power supply central shaft 3, the number of the stroke limiting pieces 505 is four, the four stroke limiting pieces 505 are divided into two groups averagely, a locking hook 507 is arranged between one group of the stroke limiting pieces 505, the output end of the locking hook 507 is provided with a reset piece 508 which moves up and down and resets, a reset spring B16 which is connected with the switch frame 1 is arranged below the reset piece 508, the clamping and the fixing of the limiting parts 15 are adjusted by bolts, and the limiting parts 15 which are respectively arranged at one end of the common power supply central shaft 2 and one end of the standby power supply central shaft 3 are arranged in the four stroke limiting pieces 505, the top of one end of one group of connecting sheets 501 is connected with the output end of the transmission shaft 10 through a fixing piece 506, the detection mechanism is used for detecting and transmitting signals and controlling the electromagnetic mechanism 4 to operate, and when the electromagnetic mechanism 4 operates, the transmission mechanism 5 drives the contact structure 6 to perform breaking operation control and realize dual-power conversion; electromagnetic mechanism 4 includes support 7, be equipped with quiet iron core 8 in support 7 and move iron core 9, quiet iron core 8 is equipped with the excitation coil 12 that advances line location through coil skeleton 13 with the outside of moving iron core 9, be equipped with copper pipe 14 between coil skeleton 13 and the quiet iron core 8, quiet iron core 8 with move and be equipped with reset spring A11 and reset spring A11 between the iron core 9 and be located the surface of transmission shaft 10, quiet iron core 8 is vertical form interval distribution from top to bottom with moving iron core 9, be equipped with in the quiet iron core 8 and be used for control to move iron core 9 and reciprocate and the transmission shaft 10 of adjusting.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

In the description of the present application, the terms "connect", "install", "fix", "set", etc. are used in a broad sense, for example, the term "connect" may be a fixed connection or an indirect connection through intermediate components without affecting the relationship and technical effects of the components, or may be an integral connection or a partial connection, and as in this case, for a person skilled in the art, the specific meaning of the above terms in the present invention or the present invention can be understood according to specific situations.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a dual supply change over switch excitation actuating mechanism, includes switch frame (1) and detection mechanism, its characterized in that: the switch rack (1) is provided with a common power supply central shaft (2), a standby power supply central shaft (3), an electromagnetic mechanism (4), a transmission mechanism (5) and a contact structure (6), the detection mechanism is used for detecting and transmitting signals and controlling the electromagnetic mechanism (4) to operate, and the transmission mechanism (5) drives the contact structure (6) to perform breaking operation control and realize dual-power supply conversion when the electromagnetic mechanism (4) operates; electromagnetic mechanism (4) are including support (7), be equipped with quiet iron core (8) in support (7) and move iron core (9), be equipped with in quiet iron core (8) and be used for controlling to move iron core (9) and reciprocate and transmission shaft (10) of adjusting.

2. The excitation driving mechanism of the dual power transfer switch according to claim 1, wherein: quiet iron core (8) and move and be equipped with reset spring A (11) and reset spring A (11) between iron core (9) and be located the surface of transmission shaft (10), quiet iron core (8) are vertical form interval distribution with moving iron core (9) and being.

3. The excitation driving mechanism of the dual power transfer switch according to claim 2, wherein: the outer sides of the static iron core (8) and the movable iron core (9) are provided with magnet exciting coils (12) which are positioned through coil frameworks (13), and copper pipes (14) are arranged between the coil frameworks (13) and the static iron core (8).

4. The dual power transfer switch excitation driving mechanism of claim 1, wherein: the transmission mechanism (5) comprises a plurality of groups of connecting pieces (501), one end of each connecting piece (501) is provided with a square shaft (502) which rotates along the surface of the switch frame (1), the other end of each connecting piece (501) is provided with a connecting shaft (503), one or more connecting pieces (504) are arranged in each connecting shaft (503), one or more stroke limiting pieces (505) which are connected with one end part of a common power supply central shaft (2) and one end part of a standby power supply central shaft (3) are arranged at the top end of each connecting piece (504), and one group of stroke limiting pieces are connected with the output end of the transmission shaft (10) through fixing pieces (506).

5. The excitation driving mechanism of the dual power transfer switch according to claim 4, wherein: the number of the travel limiting parts (505) is four, the four travel limiting parts (505) are equally divided into two groups, a lock hook (507) is arranged between one group of the travel limiting parts (505), a reset part (508) which moves up and down and resets is arranged at the output end of the lock hook (507), and limiting parts (15) connected with one end of a common power supply central shaft (2) and one end of a standby power supply central shaft (3) are arranged in the four travel limiting parts (505).

6. The excitation driving mechanism of the dual power transfer switch according to claim 5, wherein: the lower part of the reset piece (508) is provided with a reset spring B (16) connected with the switch frame (1), and the clamping and fixing of the limiting part (15) are adjusted through bolts.

7. The dual power transfer switch excitation driving mechanism of claim 1, wherein: the contact structure (6) comprises a side moving contact (17) and a side fixed contact (18), the side moving contact (17) is located above the side fixed contact (18), and the combination of the side moving contact (17) and the side fixed contact (18) is driven by the transmission mechanism (5).

8. The excitation driving mechanism of the dual power transfer switch according to claim 7, wherein: the side moving contact (17) comprises a common side moving contact (1701) and a standby side moving contact (1702), the side fixed contact (18) comprises a common side fixed contact (1801) and a standby side fixed contact (1802), and contact blocks (19) which are matched with each other are respectively arranged on the bottom of the common side moving contact (1701), the upper surface of the common side fixed contact (1801), the bottom of the standby side moving contact (1702) and the upper surface of the standby side fixed contact (1802).

9. The excitation driving mechanism of the dual power transfer switch according to claim 1, wherein: the other ends of the common power supply central shaft (2) and the standby power supply central shaft (3) are respectively provided with a driving shaft (20), and the driving shafts (20) are positioned in the side wall of the switch frame (1).