CN215344061U

CN215344061U - Power supply switching system

Info

Publication number: CN215344061U
Application number: CN202120168761.3U
Authority: CN
Inventors: 杜乐
Original assignee: China Northwest Architecture Design and Research Institute Co Ltd
Current assignee: China Northwest Architecture Design and Research Institute Co Ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-12-28
Anticipated expiration: 2031-01-21

Abstract

The invention relates to the field of power supply and distribution, in particular to a power supply switching system, which comprises: the device comprises a shell, a first fixed partition plate is arranged in the shell, the first partition plate divides the space in the shell into a weak electricity cabin and a strong electricity cabin, and a connecting seat is fixed on the outer end face of the shell, which is positioned on the strong electricity cabin; the power supply switching part can be detached in the strong electricity bin and is provided with at least two external terminals, and the external terminals extend out of the shell; the drive part, this drive part can dismantle the connection in the weak current storehouse, and the drive end of this drive part extends to strong current storehouse and is connected with power switching part. The stepping motor is adopted, and the problem that the first movable contact cannot be accurately positioned is effectively solved by setting the rotating angle, so that the first movable contact can be accurately contacted and communicated with the first contact, the second contact, the third contact, the first auxiliary contact, the second auxiliary contact and the third auxiliary contact through the set rotating angle.

Description

Power supply switching system

Technical Field

The invention relates to the field of power supply and distribution, in particular to a power supply switching system.

Background

According to relevant specification requirements, three power supplies are required for particularly important loads in the first-stage loads, and the three power supplies are mutually standby and automatically switched. At present, two switching modes of three power supplies are available, one mode is that two power supplies are switched by a dual-power transfer switch and then switched by a dual-power transfer switch with a third power supply, and the two-stage switching mode has poor reliability and flexibility, complex installation and wiring and high manufacturing cost. Another three-power switching mode is to control three circuit breakers by using a three-power switching controller, and the switching mode has the defects that no mechanical linkage exists and mutual logic wiring is required, and if a fault of the three-power controller possibly causes two circuit breakers to be switched on simultaneously, a major short-circuit accident is caused. At present, the two three-power switching modes have the common problems of poor reliability, large combination volume, high manufacturing cost, inflexible control and complex installation and wiring due to the assembly of a plurality of electrical elements. Because the two switching modes are combined by a plurality of electrical components, the switching time is long, and the requirement of quick switching time cannot be met. The two switching modes also have the defects that manual operation cannot be realized in one step, and when the control unit fails, the manual operation is complex and the automatic switching and automatic resetting functions cannot be realized.

Disclosure of Invention

The invention provides a power supply switching system, which solves the problems of complex wiring and installation of the traditional switching system and the problem that the switching can be carried out only after a plurality of electrical elements are combined and linked for a long time, realizes the random switching of three power supplies, avoids the problem of short circuit of more than two power supplies caused by the failure of a controller, solves the problem of serious accidents possibly caused by logic wiring, can meet the requirement of fast switching time, and can also be manually operated in one step.

The technical problem solved by the invention can be realized by adopting the following technical scheme:

a power switching system, comprising:

the device comprises a shell, a first fixed partition plate is arranged in the shell, the first partition plate divides the space in the shell into a weak current cabin and a strong current cabin, and a connecting seat is fixed on the outer end face of the shell, which is positioned on one side of the strong current cabin;

the power supply switching part can be detached in the strong electricity bin and is provided with at least two external terminals, and the external terminals extend out of the shell;

the driving part is detachably connected in the weak current cabin, and the driving end of the driving part extends to the strong current cabin to be connected with the power supply switching part;

and the control unit is detachably connected in the weak current cabin and is respectively and electrically connected with the external terminal and the driving part.

Further, the drive division includes step motor, connecting piece and pivot, step motor can dismantle the center department of connection on the baffle in the weak current storehouse, pivot one end and casing inside wall face center department swivelling joint, the pivot other end passes strong current storehouse, baffle one respectively and passes through the connecting piece with the step motor drive end to be connected, step motor is connected with the control unit electricity, the pivot can be dismantled with power switching portion and be connected.

Further, the power switching part at least comprises two power switching parts, the strong electricity bin is divided into at least two single-phase switching bins by at least two partition plates, the single-phase switching bins are internally provided with the power switching parts, and the rotating shaft penetrates through the at least two partition plates to be connected with the power switching parts.

Further, the power supply conversion part comprises a sleeve, a fourth contact, a first moving contact, a second moving contact, a first contact, a second contact and a third contact which are of the same structure, the fourth contact is detachably connected to a second partition plate on one side in the single-phase switching bin, the sleeve is detachably connected to the rotating shaft, one end of the second moving contact is vertically fixed on the sleeve, the other end of the second moving contact is in sliding connection with the fourth contact, the first contact, the second contact and the third contact are detachably connected to the inner circumferential surface of the single-phase switching bin at equal intervals, the first contact, the second contact, the third contact and the fourth contact are respectively and independently electrically connected with an external terminal, one end of the first moving contact is vertically fixed on the sleeve, the other end of the first moving contact sequentially slides in the first contact, the second contact and the third contact, and when the first moving contact rotates, the first moving contact sequentially slides in the first contact, the second contact and the third contact, The second contact is contacted with the third contact, and the first moving contact and the second moving contact are electrically connected between one ends of the sleeves.

Furthermore, the fourth contact is of an annular structure, an annular sliding groove is formed in the inner circumference of the fourth contact in a full mode, and the moving contact II is connected in the annular sliding groove in a sliding mode.

The power supply conversion part comprises a first auxiliary contact, a second auxiliary contact and a third auxiliary contact, wherein the first auxiliary contact, the second auxiliary contact and the third auxiliary contact are detachably connected to the inner circumferential surface of the unidirectional switching bin, the first contact, the second contact and the third auxiliary contact are electrically connected with the first auxiliary contact, the second auxiliary contact and the third auxiliary contact respectively, the first contact, the second contact and the third contact are arranged symmetrically to the rotating shaft with the first auxiliary contact, the second auxiliary contact and the third auxiliary contact respectively, and the first auxiliary contact, the second auxiliary contact, the third auxiliary contact, the first contact, the second contact and the third contact are uniformly distributed on the inner circumferential surface of the unidirectional switching bin.

Furthermore, the inner end face of the weak current cabin is provided with a turntable, the outer edge of the shell, which is positioned on the outer end face of the weak current cabin, is provided with a visual hole, the rear end of the rotor of the stepping motor is connected with a sleeve, and the center of the turntable is sleeved on the outer circumferential surface of the sleeve.

Furthermore, the outer end face of the shell, which is positioned on the weak current cabin, is provided with an insertion hole, one end of the sleeve, which is positioned on the insertion hole, is provided with inner four-corner insertion holes, and a crank, which can penetrate through the insertion hole and be inserted into the inner four-corner insertion holes, is arranged outside the shell.

Further, the control unit includes power supply unit, processing unit, communication unit and power monitoring unit, electric connection between power supply unit, processing unit, communication unit and the power monitoring unit, power supply unit and processing unit all with step motor electric connection, power monitoring unit and the external terminal electric connection outside the casing.

The invention has the beneficial effects that: by adopting the stepping motor and setting the rotating angle, the problem that the first movable contact cannot be accurately positioned is effectively solved, and the accurate contact and communication between the first movable contact, the second movable contact, the third movable contact, the first auxiliary contact, the second auxiliary contact and the third auxiliary contact can be realized through the set rotating angle.

Due to the fact that the first contact, the second contact, the third contact, the first auxiliary contact, the second auxiliary contact and the third auxiliary contact are adopted, meanwhile, the first contact is communicated with the first auxiliary contact, the second contact is communicated with the second auxiliary contact, and the third contact is communicated with the third auxiliary contact, each power supply single-phase power supply is provided with a pair of contacts in each single-phase switching bin, the situation that one contact cannot be normally contacted and electrified is prevented, and the other contact can be connected.

Due to the adoption of the turntable, the positions of the first contact, the second contact, the third contact, the first auxiliary contact, the second auxiliary contact and the third auxiliary contact on the turntable are marked, and the first movable contact can be directly and directly seen to be in contact with the contacts through the visual hole.

Due to the adoption of the crank, the sleeve is driven to drive the rotor of the stepping motor to rotate by shaking the crank, and the power supply is manually switched by matching with the visual hole on the turntable.

The wiring terminal is arranged outside the shell, and the power supply is directly connected with the external terminal without logical wiring.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a side cross-sectional view of the present invention.

Fig. 4 is a side view of the present invention.

Fig. 5 is a schematic view showing the on state of the first and second contacts of the movable contact of the present invention.

Fig. 6 is a schematic view of the first and second contacts of the movable contact of the present invention in a reverse switching state.

Fig. 7 is a schematic view of the forward switching state of the first and second contacts of the movable contact of the present invention.

Fig. 8 is a schematic view of the coil spring and tip bead configuration of the present invention.

Fig. 9 is a view of the top groove of the present invention in a turntable layout.

In the figure: 1-a shell; 101-weak current cabin; 102-a powerful electric bin; 2-a first clapboard; 3-a connecting seat; 4-external connection terminal; 5-a step motor; 6-connecting piece; 7-a rotating shaft; 8-a second clapboard; 9-a sleeve; 10-a fourth contact; 11-moving contact one; 12-a second contact; 13-a third contact; 14-auxiliary contact one; 15-auxiliary contact two; 16-auxiliary contact three; 17-a turntable; 18-a sleeve; 19-a crank; 20-a first contact; 21-a coil spring; 22-top bead; 23-second contact.

Detailed Description

Example 1:

referring to fig. 1 to 3, which are schematic structural views of embodiment 1 of the present invention, a power switching system includes:

the device comprises a shell 1, wherein a first fixed partition plate 2 is arranged in the shell 1, the first partition plate 2 divides the inner space of the shell into a weak electricity cabin 101 and a strong electricity cabin 102, and a connecting seat 3 is fixed on the outer end face of the shell 1, which is positioned on one side of the strong electricity cabin 102;

a power switching part which is detachable in the strong electric cabin 102 and is provided with at least two external terminals 4, and the external terminals 4 extend out of the shell 1;

the driving part is detachably connected in the weak current cabin 101, and the driving end of the driving part extends to the strong current cabin 102 to be connected with the power supply switching part;

and the control unit is detachably connected in the weak current cabin 101 and is respectively and electrically connected with the external terminal 4 and the driving part.

In actual use: casing 1 is fixed to the switch board or has the electric safety and marks the region through connecting seat 3, with load input end and three kinds of power supply respectively with the outer external terminal 4 electric connection of casing 1, these three kinds of power supply have a power supply commonly used at least, power supply commonly used is as load normal power supply, power supply commonly used passes through power switching part with electric energy transmission to load, simultaneously through control unit control external terminal 4 whether have the electric current to pass through, when power supply commonly used cuts off the power supply, control unit starts drive division, drive division drive power switching part, power switching part action, switch to stand-by power supply, if stand-by power supply does not normally work, do not produce the electric current, control unit restarts drive division, drive division drive power switching part, power switching part action, switch to another stand-by power supply, in order to guarantee load normal work.

In this embodiment, the load may be a single device or a plurality of devices, the plurality of devices are connected to the output terminal of the main power switch through a circuit, and the input terminal of the main power is electrically connected to the power switching part through the external terminal.

The first partition plate 2 is made of an insulating material, and divides the strong current cabin 102 and the weak current cabin 101 to prevent strong current from breaking through components in the weak current cabin 101.

Example 2:

referring to fig. 1, the present embodiment is different in that: the drive division includes step motor 5, connecting piece 6 and pivot 7, step motor 5 can dismantle the center department of connection on baffle 2 in weak current storehouse 101, pivot 7 one end and 1 inside wall face center department swivelling joint of casing, the pivot 7 other end passes strong current storehouse 102, baffle 2 respectively and is connected through connecting piece 6 with step motor 5 drive end, step motor 5 is connected with the control unit electricity, pivot 7 can dismantle with power switching over portion and be connected.

In actual use: the control unit drives the stepping motor 5 to rotate, the rotation angle of the stepping motor 5 is controlled through a preset rotation angle, the stepping motor 5 drives the rotating shaft 7 to rotate through the connecting piece 6, the rotating shaft 7 drives the power supply switching part to act, and the power supply switching part is controlled to switch among three power supply sources.

Example 3:

referring to fig. 1, the present embodiment is different in that: the power switching part at least comprises two power switching parts, the strong electricity bin 102 is internally divided into at least two single-phase switching bins by at least two partition plates II 8, the power switching parts are arranged in the single-phase switching bins, and the rotating shaft 7 penetrates through the at least two partition plates II 8 to be connected with the power switching parts.

In actual use: in this embodiment, the power conversion parts have at least two pairs to form two pairs of unidirectional switching bins, and each power conversion part is electrically connected with the load and a single power line in the three power supplies respectively.

Two power conversion parts are needed for switching two-phase power, at least three power conversion parts are needed for switching three-phase power, and the specific electrical connection mode is common technical knowledge in the field.

Example 4:

referring to fig. 1 to 7, the present embodiment is different in that: the power supply conversion part comprises a sleeve 9, a fourth contact 10, a first moving contact 11, a second moving contact 12, a first contact 20, a second contact 23 and a third contact 13 which are the same in structure, wherein the fourth contact 10 is detachably connected to a second partition plate 8 on one side in the single-phase switching bin, the sleeve 9 is detachably connected to a rotating shaft 7, one end of the second moving contact 12 is vertically fixed on the sleeve 9, the other end of the second moving contact 12 is in sliding connection with the fourth contact 10, the first contact 20, the second contact 23 and the third contact 13 are detachably connected to the inner circumferential surface of the single-phase switching bin at equal intervals, the first contact 20, the second contact 23, the third contact 13 and the fourth contact 10 are respectively and independently electrically connected with an external terminal 4, one end of the first moving contact 11 is vertically fixed on the sleeve 9, and the other end of the first moving contact 11 sequentially slides in the first contact 20, the second contact 23 and the third contact 13, and the moving contact 11 is contacted with the first contact 20, the second contact 23 and the third contact 13 in turn when rotating, and the moving contact 11 and the moving contact 12 are electrically connected between one ends of the sleeves.

In actual use: the first contact 20, the second contact 23, the third contact 13 and the fourth contact 10 are respectively and independently connected with one external terminal 4, the four power conversion parts are provided with sixteen external terminals, the first contact 20, the second contact 23 and the third contact 13 of the four power switching parts are respectively and electrically connected with L1, L2, L3 and L4 of three power supplies through the external terminals 4, and meanwhile, the L1, L2, L3 and L4 of loads are electrically connected with the fourth contact 10 of the four power switching parts through the external terminals 4.

The common power supply is electrically connected with the second contact 23, the initial state is the state that the first movable contact 11 is connected with the second contact 23, the second movable contact 12 is connected with the fourth contact 10, the common power supply supplies power for the load through the external terminal 4 connected with the second contact 23, the first movable contact 11, the second movable contact 12, the fourth contact 10 and the fourth contact 10, when the power supply is switched, the sleeve 9 in the four power conversion parts is simultaneously driven by the rotating shaft 7 to rotate, the sleeve 9 drives the first movable contact 11 and the second movable contact 12 to rotate, the first movable contact 11 rotates towards the first contact 20, when the rotating shaft 7 is driven by the stepping motor 5 to rotate through a preset rotation angle, the first movable contact 11 can be in contact with the first contact 20 to form a passage, meanwhile, the first movable contact 11 is separated from the second contact 23, and at the moment, the power supply is supplied through the power supply communicated with the first contact 20, if no current passes through the stepping motor 5, the first movable contact 11 is continuously driven to rotate reversely, the first movable contact 11 is contacted with the third contact 13 through the second contact 23, at the moment, power is supplied by a power supply communicated with the third contact 13, and after the normal power supply is recovered, the first movable contact 11 is driven by the driving stepping motor 5 to be recovered to be contacted with the second contact 23.

In this embodiment, the first contact 20, the second contact 23, and the third contact 13 are all formed by a pair of spring strips which are symmetrically arranged, the outer end of the first movable contact 11 rotates to a position between the spring strips, the spring strips clamp the outer end of the first movable contact, the two sides of the spring strips are provided with inclined planes, the first movable contact 11 is prevented from colliding with the end faces of the first contact 20, the second contact 23, and the third contact 13, so that the first movable contact cannot enter between the two spring strips, the distance between the first contact 20, the second contact 23, and the third contact 13 minus the width of the movable contact is more than 10MM, and arc generation is prevented.

Example 5:

referring to fig. 1 and 3, the present embodiment is different in that: the fourth contact 10 is of an annular structure, an annular sliding groove is fully formed in the inner circumference of the fourth contact 10, and the second moving contact 12 is connected in the annular sliding groove in a sliding mode.

In actual use: the second moving contact 12 is clamped by the annular sliding groove, and the second moving contact 12 slides in the sliding groove and is kept clamped by the sliding groove.

The cross section of the fourth contact 10 in this embodiment is the same as the end face structure of the first contact 20, the second contact 23 and the third contact 13.

Example 6:

referring to fig. 3, the present embodiment is different in that: the power supply conversion part further comprises a first auxiliary contact 14, a second auxiliary contact 15 and a third auxiliary contact 16, the first auxiliary contact 14, the second auxiliary contact 15 and the third auxiliary contact 16 are detachably connected to the inner circumferential surface of the unidirectional switching bin, the first contact 20, the second contact 23 and the third contact 13 are respectively and electrically connected with the first auxiliary contact 14, the second auxiliary contact 15 and the third auxiliary contact 16, the first contact 20, the second contact 23 and the third contact 13 are respectively and symmetrically arranged with the first auxiliary contact 14, the second auxiliary contact 15 and the third auxiliary contact 16 on the rotating shaft 7, and the first auxiliary contact 14, the second auxiliary contact 15, the third auxiliary contact 16, the first contact 20, the second contact 23 and the third contact 13 are uniformly distributed on the inner circumferential surface of the unidirectional switching bin.

In actual use: the first contact 20, the second contact 23 and the third contact 13 are respectively provided with a first auxiliary contact 14, a second auxiliary contact 15 and a third auxiliary contact 16 which are communicated, when in switching, two contacts of each power supply can be connected, the first movable contact 11 is switched into the second contact 23, the first contact 20, the third auxiliary contact 16, the second auxiliary contact 15, the first auxiliary contact 14 and the third contact 13 in the single-phase switching bin, and the arrangement mode is that the stepping motor 5 can be switched along the trend without being rotated reversely, so that the switching distance is increased, and the power-off time is increased.

After the first contact 20, the second contact 23, the third contact 13, the first auxiliary contact 14, the second auxiliary contact 15 and the third auxiliary contact 16 are switched, the second contact 23 is reset, when the movable contact is used next time, the stepping motor 5 is started reversely, reverse power supply switching is carried out, the movable contact 11 scrapes burrs on the contacts due to forward switching to scrape the burrs reversely, the effect of self-cleaning the contacts is achieved, and the problem of switching blockage is prevented.

In the embodiment, the first contact 20, the second contact 23 and the third contact 13 have the same structure as the first auxiliary contact 14, the second auxiliary contact 15 and the third auxiliary contact 16, and the first contact 20, the second contact 23, the third contact 13, the first auxiliary contact 14, the second auxiliary contact 15 and the third auxiliary contact 16 are detachably connected in the single-phase switching chamber at equal intervals and are located on the same circumference.

Example 7:

referring to fig. 1 and 8-9, the present embodiment differs in that: the inner end face of the weak current cabin 101 is provided with a turntable 17, the outer edge of the shell 1, which is positioned on the outer end face of the weak current cabin 101, is provided with a visual hole, the rear end of the rotor of the stepping motor 5 is connected with a sleeve 18, and the center of the turntable 17 is sleeved on the outer circumferential face of the sleeve 18.

In actual use: the positions of the rotary disc 17 corresponding to the first contact 20, the second contact 23, the third contact 13, the first auxiliary contact 14, the second auxiliary contact 15 and the third auxiliary contact 16 are marked, when the rotary shaft 7 rotates, the rotary disc 17 synchronously rotates through the sleeve 18, and when the first movable contact 11 is switched, the mark can directly reflect which contact the first movable contact 11 is communicated with through the visual hole.

In this embodiment, the housing 1 is provided with a damping hole, a coil spring 21 and a top ball 22 are sequentially embedded in the damping hole, six top grooves are equidistantly formed in the turntable 17, and the top ball 22 is partially positioned in the top grooves.

Carousel 17 is when rotatory, and the overhead kick 22 removes out the overhead kick, and the friction rolls on carousel 17, and carousel 17 rotates, and when next overhead kick was coincided with overhead kick 22, the overhead kick 22 was filled in the overhead kick by coil spring 21 effect, through the overhead kick the same with the contact corner, during manual switching power, fell into the overhead kick through overhead kick 22, and the formation hinders meet by chance, the staff's sense organ of being convenient for switches.

Example 8:

referring to fig. 1, the present embodiment is different from embodiment 1 in that: an insertion hole is formed in the outer end face, located on the weak current bin 101, of the shell 1, an inner four-corner insertion hole is formed in one end, located on the insertion hole, of the sleeve 18, and a crank 19 capable of penetrating through the insertion hole and being inserted into the inner four-corner insertion hole is arranged outside the shell 1.

In actual use: when the stepping motor 5 cannot work or automatic switching is not needed, the crank 19 is inserted into the sleeve 18, the crank 19 is rotated to drive the sleeve 18 to rotate, the sleeve 18 drives the rotor of the stepping motor 5 to rotate, the rotating shaft 7 is driven to rotate, switching of a power supply is further carried out, and meanwhile, the rotating angle can be controlled to carry out switching between contacts of the movable contact I11 by matching with the prompt on the turntable 17 visible in the visual hole.

Example 9:

referring to fig. 1, the present embodiment is different in that: including power supply unit, processing unit, communication unit and power monitoring unit, electric connection between power supply unit, processing unit, communication unit and the power monitoring unit, power supply unit and processing unit all with 5 electric connection of step motor, power monitoring unit and the outer external terminal 4 electric connection of casing 1.

In actual use: provide the power that can make its operation through the power supply unit to step motor 5, adopt lithium cell and charge-discharge module in this embodiment, processing unit passes through power monitoring unit and monitors whether there is the electric current to pass through external terminal 4, when the outage condition appears, processing unit detects the signal of receiving power monitoring unit, processing unit drive step motor 5 rotates, which external terminal 4 that other two power supply connected who monitors according to power monitoring unit has current-voltage, drive step motor 5 rotates to the contact that can provide the power, step motor 5 action signal and power monitoring unit's signal, upload the high in the clouds through processing unit by the communication unit, supply terminal information to read.

Example 10:

a power switching method, at least comprising any one of the power switching systems described above, further comprising the steps of:

preparing a load access end and three different power supply sources, wherein each phase of the access end of the load access end is respectively and sequentially connected with a fourth contact in a single-phase switching bin through an external terminal 4, each output end of the three power supply sources is respectively and sequentially connected with a first contact 20, a second contact 23 and a third contact 13 in the single-phase switching bin through the external terminal 4, the power supply source electrically connected with the second contact 23 is a common power supply, and the second contact 23 is an initial position;

step two, detecting the output and input states of each external terminal 4 through a power supply monitoring unit, inputting each phase of electricity of a common power supply to a second contact 23 through the external terminal 4, sequentially conveying the electricity to a load contact end through a first movable contact 11, a second movable contact 12, a fourth contact 10 and the external terminal 4 communicated with the fourth contact 10, and supplying power to load equipment through the load contact end;

step three, the common power supply is powered off in the step two, the power supply monitoring unit does not detect that the second contact 23 and the fourth contact 10 have current to pass through, the power supply monitoring unit transmits signals to the processing unit for processing, the processing unit respectively transmits signals to the communication unit and the stepping motor 5, the communication unit uploads a power-off prompt to the cloud, the stepping motor 5 provides an operable power supply through the power supply unit, the stepping motor 5 is started, the driving end of the stepping motor 5 drives the rotating shaft 7 to rotate towards the first contact 20 through the connecting piece 6, the rotating shaft 7 drives the sleeve 9 in each single-phase switching bin to rotate, the sleeve 9 drives the first moving contact 11 and the second moving contact 12 to rotate, the first moving contact 11 is separated from the second contact 23, the set rotating angle is in contact with the first contact 20 and is communicated with a power supply circuit connected with the first contact 20, the stepping motor 5 stops, and the power supply is supplied by the power supply connected with the first contact 20;

step four, in the step three, the power supply connected with the first contact 20 does not detect current through the power supply monitoring unit, the stepping motor 5 is continuously started, the first moving contact 11 and the second moving contact 12 are continuously rotated, the first moving contact 11 is separated from the first contact 20, the rotating set angle is contacted with the third auxiliary contact 16, the third auxiliary contact 16 is formed through a power supply circuit connected with the third contact 13, and at the moment, the power supply connected with the third contact 13 supplies power;

step five, after the power supply of the common power supply is recovered, starting the stepping motor 5, driving the rotating shaft 7 to rotate towards the direction of the auxiliary contact II 15 by the stepping motor 5, and enabling the movable contact I11 to be communicated with the second contact 23 through the passage of the auxiliary contact II 15 and the second contact 23 so that the common power supply supplies power to the load equipment;

when the auxiliary contact II 15 is electrified, the auxiliary contact II 15 is at the initial position, the common power supply is powered off, the stepping motor 5 moves towards the auxiliary contact I14 and is communicated with the auxiliary contact I14, if no current is detected, the stepping motor continues to move towards the third contact 13 and is communicated with the third contact 13, and if no current is detected, the stepping motor continues to move towards the first contact 20 for resetting;

and step six, after the moving contact rotates for a circle, reversely rotating to switch a power supply, and through the reverse rotation, the moving contact 11 can reversely rotate to the second contact 23, the auxiliary contact 14, the auxiliary contact 15, the auxiliary contact three 16 and the first contact 20, and then continuously rotating to the second contact 23 to reset, and the moving contact 11 is connected with each contact through the reverse stroke, so that the contacts can be cleaned.

While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.

Claims

1. A power switching system, comprising:

the device comprises a shell (1), wherein a first fixed partition plate (2) is arranged in the shell (1), the first partition plate (2) divides the inner space of the shell into a weak current cabin (101) and a strong current cabin (102), and a connecting seat (3) is fixed on the outer end face of the shell (1) positioned on one side of the strong current cabin (102);

the power supply switching part is detachable in the strong electricity bin (102), and is provided with at least two external terminals (4), and the external terminals (4) extend out of the shell (1);

the driving part is detachably connected in the weak current cabin (101), and the driving end of the driving part extends to the strong current cabin (102) and is connected with the power supply switching part;

the control unit is detachably connected in the weak current bin (101), and is respectively and electrically connected with the external terminal (4) and the driving part.

2. The power switching system according to claim 1, wherein the driving portion comprises a stepping motor (5), a connecting member (6) and a rotating shaft (7), the stepping motor (5) is detachably connected to a center of a first partition plate (2) in the weak current bin (101), one end of the rotating shaft (7) is rotatably connected to a center of an inner side wall surface of the housing (1), the other end of the rotating shaft (7) penetrates through the strong current bin (102) and the first partition plate (2) to be connected with a driving end of the stepping motor (5) through the connecting member (6), the stepping motor (5) is electrically connected with the control unit, and the rotating shaft (7) is detachably connected with the power switching portion.

3. The power switching system according to claim 2, wherein the power switching portion comprises at least two power switching portions, the inside of the power supply chamber (102) is divided into at least two single-phase switching chambers by at least two second partition plates (8), the power switching portions are arranged in the single-phase switching chambers, and the rotating shafts (7) are connected with the power switching portions through the at least two second partition plates (8).

4. The power switching system according to claim 3, wherein the power switching part comprises a sleeve (9), a fourth contact (10), a first moving contact (11), a second moving contact (12), a first contact (20), a second contact (23) and a third contact (13) which are of the same structure, the fourth contact (10) is detachably connected to a second partition (8) on one side in the single-phase switching chamber, the sleeve (9) is detachably connected to the rotating shaft (7), one end of the second moving contact (12) is vertically fixed on the sleeve (9), the other end of the second moving contact (12) is slidably connected with the fourth contact (10), the first contact (20), the second contact (23) and the third contact (13) are detachably connected to the inner circumferential surface of the single-phase switching chamber at equal intervals, the first contact (20), the second contact (23), the third contact (13) and the fourth contact (10) are respectively and electrically connected with a single external terminal (4), one end of the first moving contact (11) is vertically fixed on the sleeve (9), the other end of the first moving contact (11) slides in the first contact (20), the second contact (23) and the third contact (13) in sequence, the first moving contact (11) is in contact with the first contact (20), the second contact (23) and the third contact (13) in sequence when rotating, and the first moving contact (11) and the second moving contact (12) are located between one ends of the sleeves and are electrically connected.

5. The power switching system according to claim 4, wherein the fourth contact (10) is of an annular structure, an inner circumference of the fourth contact (10) is fully provided with an annular sliding groove, and the second movable contact (12) is slidably connected in the annular sliding groove.

6. The power switching system according to claim 4, wherein the power switching part further comprises a first auxiliary contact (14), a second auxiliary contact (15), and a third auxiliary contact (16), the first auxiliary contact (14), the second auxiliary contact (15), and the third auxiliary contact (16) are detachably connected to an inner circumferential surface of the unidirectional switching chamber, the first contact (20), the second contact (23), and the third contact (13) are electrically connected to the first auxiliary contact (14), the second auxiliary contact (15), and the third auxiliary contact (16), respectively, the first contact (20), the second contact (23), and the third contact (13) are arranged symmetrically to the rotating shaft (7) with the first auxiliary contact (14), the second auxiliary contact (15), and the third auxiliary contact (16), respectively, and the first auxiliary contact (14), the second auxiliary contact (15), the third auxiliary contact (16), respectively, The first contact (20), the second contact (23) and the third contact (13) are uniformly distributed on the inner circumferential surface of the single switching bin.

7. The power supply switching system according to claim 2, wherein a rotating disc (17) is arranged on an inner end face of the weak current bin (101), a visual hole is formed in the outer edge of the shell (1) located on the outer end face of the weak current bin (101), a sleeve (18) is connected to the rear end of the rotor of the stepping motor (5), and the center of the rotating disc (17) is sleeved on the outer circumferential face of the sleeve (18).

8. A power switching system according to claim 7, wherein the outer end face of the housing (1) located at the weak current chamber (101) is provided with an insertion hole, one end of the sleeve (18) located at the insertion hole is provided with inner four-corner insertion holes, and the housing (1) is externally provided with a crank (19) which can be inserted into the inner four-corner insertion holes through the insertion hole.

9. The power switching system according to claim 1, wherein the control unit comprises a power supply unit, a processing unit, a communication unit and a power monitoring unit, the power supply unit, the processing unit, the communication unit and the power monitoring unit are electrically connected, the power supply unit and the processing unit are both electrically connected with the stepping motor (5), and the power monitoring unit is electrically connected with the external terminal (4) outside the housing (1).