External automatic switching dual power switch device

Abstract

The present invention discloses an external automatic switching dual power switch device, comprising a mounting bracket, a maintenance self-locking button, two opening and closing screws arranged in parallel and a first opening and closing motor and a second opening and closing motor connected in corresponding transmission connection, each opening and closing screw corresponds to an opening and closing slider with threaded matching, one of the opening and closing sliders is detachably provided with a first opening and closing control device, and the other opening and closing slider is detachably provided with a second opening and closing control device; the device can realize automatic conversion of power supply to a load by a first power circuit and a second power circuit, the control element arrangement and circuit connection of the first opening and closing control device and the second opening and closing control device, which are the main internal switching components, are the same, and the two are detachable and interchangeable; in addition, when installed on different switch plastic shells, opening and closing screws of suitable length can be selected according to the size of the switch plastic shell for assembly and installation, so the switch has strong versatility and is not limited by the installation space.

Description

Technical Field

[0001] The invention relates to the technical field of switching technology for power systems, and in particular to an external automatic switching dual power switch device. Background Art

[0002] When the normal power supply is suddenly cut off, the dual power conversion switch connects the load to the backup power supply through the action of the internal switching mechanism to achieve uninterrupted power supply, avoid the shutdown of running equipment, and keep the equipment running stably. It is widely used in high-rise buildings, residential areas, hospitals, airports, docks, fire protection, metallurgy, chemical industry, textile and other important places where power outages are not allowed.

[0003] It is well known that the automatic dual power switches currently in use are much more expensive than ordinary switches, and they are all integrated one-piece packaging structures. It is difficult to make secondary adjustments after installation and fixation. In addition, when internal components fail, the entire switch needs to be disassembled for repair or replacement. Even the entire dual power switch may be replaced due to a minor failure, resulting in high maintenance costs and serious waste of electronic components. At the same time, due to the fixed structure of the dual power switch, it is difficult to cooperate with the traditional switch plastic shell and has poor versatility. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an external automatic switching dual power switch device with switch opening and closing control components that can be used interchangeably and with small installation restrictions on the switch plastic shell.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: an external automatic switching dual power switch device, which is electrically connected to a first power circuit and a second power circuit respectively, and includes a mounting bracket, on which two parallel opening and closing screws are rotatably mounted, and the mounting bracket is also equipped with a first opening and closing motor and a second opening and closing motor that are correspondingly connected to the two opening and closing screws. The first opening and closing motor is respectively connected in series to the first power circuit and the second power circuit, and the second opening and closing motor is respectively connected in series to the first power circuit and the second power circuit. The upper limit of the mounting bracket is equipped with an opening and closing slider that matches the corresponding threads of each opening and closing screw, wherein a first opening and closing control device is detachably mounted on one of the opening and closing sliders, and a second opening and closing control device is detachably mounted on the other opening and closing slider, and the first opening and closing control device and the second opening and closing control device are interlocked and electrically connected, and also include a maintenance self-locking button, and the first opening and closing control device and the second opening and closing control device are respectively electrically connected to the maintenance self-locking button.

[0006] As a preferred technical solution, the first opening and closing control device includes a first opening and closing housing, on which a first power stop button is installed, a group of contacts of the first power stop button are connected in series with a first power manual closing circuit, a group of contacts of the maintenance self-locking button are connected in series with the first power manual closing circuit, and a first power automatic closing circuit is connected to the first power manual closing circuit, and also includes a second power opening circuit, the first power manual closing circuit is connected to the first opening and closing motor, the second power opening circuit is connected to the second opening and closing motor, and also includes a first power closing circuit and a second power opening circuit connected in parallel to the first power circuit, the first power closing circuit is electrically connected to the first opening and closing motor, and the second power opening circuit is electrically connected to the second opening and closing motor.

[0007] As a preferred technical solution, the second opening and closing control device includes a second opening and closing housing, a second power stop button is installed on the second opening and closing housing, a group of contacts of the second power stop button is connected in series with a second power manual closing circuit, another group of contacts of the maintenance self-locking button is connected in series with the second power manual closing circuit, and a second power automatic closing circuit is connected to the second power manual closing circuit, and also includes a first power opening circuit, the second power manual closing circuit is connected to the second opening and closing motor, the first power opening circuit is connected to the first opening and closing motor, and also includes a second power closing circuit and a first power opening circuit connected in parallel to the second power circuit, the second power closing circuit is electrically connected to the second opening and closing motor, and the first power opening circuit is electrically connected to the first opening and closing motor.

[0008] As a preferred technical solution, a normally open contact KM1-1 of a first power closing relay KM1 is connected in series between the first opening and closing motor and the first power circuit, and a normally open contact KM2-1 of a second power opening relay KM2 is connected in series between the first opening and closing motor and the second power circuit; a normally open contact KM3-1 of a second power closing relay KM3 is connected in series between the second opening and closing motor and the second power circuit, and a normally open contact KM4-1 of a first power opening relay KM4 is connected in series between the second opening and closing motor and the first power circuit.

[0009] As a preferred technical solution, the first manual power closing circuit includes a first manual power closing button SB1, which are connected in series with the first power stop button, the normally open contact KM4-2 of the first power opening relay KM4, the normally closed contact KM3-2 of the second power closing relay KM3 and the coil of the first power closing relay KM1. The maintenance self-locking button is connected in series between the normally open contact KM4-2 of the first power opening relay KM4 and the normally closed contact KM3-2 of the second power closing relay KM3. The first manual power closing button SB1 is self-locked in parallel with the normally open contact KM1-2 of the first power closing relay KM1.

[0010] As a preferred technical solution, the first power automatic closing circuit includes a first power automatic closing button SB2, the output end of the first power automatic closing button SB2 is connected in series with the normally open contact KM2-2 of the second power opening relay KM2 and the coil of the first power automatic closing delay relay KT1 in sequence, and the delay contact KT1-1 of the first power automatic closing delay relay KT1 is connected in parallel to the two ends of the first power manual closing button SB1;

[0011] The first power-on circuit includes a first power-on photoelectric proximity switch Q3 and a coil of a first power-on relay KM8 connected in series on the first power circuit, and a normally closed contact KM8-1 of the first power-on relay KM8 and a normally open contact KM1-1 of the first power-on relay KM1 are arranged in series.

[0012] As a preferred technical solution, the second power disconnecting circuit includes a normally closed contact KM3-3 of the second power closing relay KM3 and a coil of the first power disconnecting relay KM4 which are sequentially connected in series with the first power stop button;

[0013] The second power-off circuit includes a second power-off photoelectric proximity switch Q2 and a coil of a second power-off relay KM6 connected in series to the first power circuit, and the normally closed contact KM6-1 of the coil of the second power-off relay KM6 is arranged in series with the normally open contact KM4-1 of the first power-off relay KM4.

[0014] As a preferred technical solution, the second manual power closing circuit includes a second manual power closing button SB3, which is connected in series with the second power stop button, the normally open contact KM2-3 of the second power opening relay KM2, the normally closed contact KM1-3 of the first power closing relay KM1 and the coil of the second power closing relay KM3. The maintenance self-locking button is connected in series between the normally open contact KM2-3 of the second power opening relay KM2 and the normally closed contact KM1-3 of the first power closing relay KM1. The second manual power closing button SB3 is self-locked in parallel with the normally open contact KM3-4 of the second power closing relay KM3.

[0015] As a preferred technical solution, the second power automatic closing circuit includes a second power automatic closing button SB2 ， , the second power automatic closing button SB2 ， The output end is connected in series with the normally open contact KM4-3 of the first power-using opening relay KM4 and the coil of the second power-using automatic closing delay relay KT2 in sequence, and the delay contact KT2-1 of the second power-using automatic closing delay relay KT2 is connected in parallel to the two ends of the first power-using manual closing button SB3;

[0016] The second power-on circuit includes a second power-on photoelectric proximity switch Q4 and a coil of a second power-off relay KM9 connected in series to the first power circuit, and the normally closed contact KM9-1 of the second power-off relay KM9 is arranged in series with the normally open contact KM3-1 of the second power-on relay KM3.

[0017] As a preferred technical solution, the first power disconnecting circuit includes the normally closed contact KM1-4 of the first power closing relay KM1 and the coil of the second power disconnecting relay KM2 which are sequentially connected in series with the second power stop button;

[0018] The first power-off circuit includes a first power-off photoelectric proximity switch Q1 and a coil of a first power-off relay KM7 connected in series to the second power circuit, and a normally closed contact KM7-1 of the first power-off relay KM7 and a normally open contact KM2-1 of the second power-off relay KM2 are arranged in series.

[0019] Due to the adoption of the above technical scheme, the present invention has the following beneficial effects: the device can realize automatic conversion of the power supply of the load by the first power circuit and the second power circuit, the control element layout and circuit connection of the first opening and closing control device and the second opening and closing control device of the internal main switching components are the same, and the two are detachable and interchangeable. In addition, when installed on different switch plastic shells, the opening and closing screws of appropriate length can be selected according to the size of the switch plastic shell for assembly and installation. Therefore, the switch has strong versatility and is not limited by the installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings are intended only to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0021] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the matching state of the opening and closing slider and the opening and closing screw in an embodiment of the present invention;

[0023] Figure 3 is a circuit schematic diagram of an embodiment of the present invention;

[0024] In the figure: 1-first power circuit; 2-second power circuit; 3-mounting bracket; 4-opening and closing screw; 5-opening and closing slider; 6-first opening and closing housing; 7-second opening and closing housing. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0026] like Figure 1 and Figure 2As shown, the external automatic switching dual power switch device is electrically connected to the first power circuit 1 and the second power circuit 2 respectively. In this embodiment, the first power circuit 1 is the mains power, and the second power circuit 2 is the backup power obtained by the operation of the oil engine. It specifically includes a mounting bracket 3 for supporting and realizing the connection and fixation of the switch with the original switch plastic shell. Two opening and closing screws 4 arranged in parallel are rotatably mounted on the mounting bracket 3, and a first opening and closing motor M1 and a second opening and closing motor M2 which are correspondingly connected to the two opening and closing screws 4 are also mounted in parallel on the mounting bracket 3, the first opening and closing motor M1 is respectively connected in series to the first power circuit 1 and the second power circuit 2, and the second opening and closing motor M2 is respectively connected in series to the first power circuit 1 and the second power circuit 2, that is, the first opening and closing motor M1 realizes the connection between the switch and the first power circuit 1, and realizes the disconnection between the second opening and closing motor M2 and the second power circuit 2, and the second opening and closing motor M2 realizes the connection with the second power circuit 2, and realizes the disconnection between the first opening and closing motor M1 and the first power circuit 1.

[0027] In this embodiment, the upper limit position of the mounting bracket 3 is installed with a switch-on and switch-off slider 5 that matches the corresponding thread of each switch-on and switch-off screw 4. The limit installation of the switch-on and switch-off slider 5 can be achieved by setting a slideway or a slide rail. A first switch-on and switch-off control device is detachably installed on one of the switch-on and switch-off sliders 5, and a second switch-on and switch-off control device is detachably installed on the other switch-on and switch-off slider 5. The first switch-on and switch-off control device and the second switch-on and switch-off control device are interlocked and electrically connected, so that one of the two circuits can be powered. The first switch-on and switch-off control device and the second switch-on and switch-off control device are respectively installed and fixed on the switch-on and switch-off slider 5, and the closing and opening of the first switch-on and switch-off control device or the second switch-on and switch-off control device are achieved by controlling the forward and reverse rotation of the first switch-on and switch-off motor M1 and the second switch-on and switch-off motor M2.

[0028] This embodiment is also provided with a maintenance self-locking button SB4, which can be installed on the first opening and closing control device or the second opening and closing control device, and the first opening and closing control device and the second opening and closing control device are respectively electrically connected to the maintenance self-locking button SB4, which is used when the switch device is under maintenance, and the first opening and closing control device and the second opening and closing control device are disconnected at the same time for safe maintenance. The first opening and closing control device and the second opening and closing control device are respectively installed on the surface of the opening and closing slider 5, without other components to cover, so as to form an external control mechanism, which can be matched and used on switches of various models and brands.

[0029] like Figure 2 and Figure 3As shown, the first opening and closing control device includes a first opening and closing housing 6, on which a first power stop button SB5 is installed, a group of contacts of the first power stop button SB5 is connected in series with a first power manual closing circuit, a group of contacts of the maintenance self-locking button SB4 is connected in series with the first power manual closing circuit, and a first power automatic closing circuit is connected to the first power manual closing circuit, and also includes a second power opening circuit, the first power manual closing circuit is connected to the first opening and closing motor M1, the second power opening circuit is connected to the second opening and closing motor M2, a second power opening circuit is provided corresponding to the second opening and closing motor M2, the second power opening circuit is connected to the second power opening circuit, and also includes a first power closing circuit and a second power opening circuit connected in parallel to the first power circuit, the first power closing circuit is electrically connected to the first opening and closing motor M1, and the second power opening circuit is electrically connected to the second opening and closing motor M2. This device closes the first power circuit 1 through the first opening and closing motor M1, and simultaneously opens the second power circuit 2 connected to the second opening and closing motor M2, thereby realizing power supply from a single power source.

[0030] The second opening and closing control device comprises a second opening and closing housing 7, on which a second power stop button SB5 is installed. ， , the second power stop button SB5 ， A group of contacts of the maintenance self-locking button SB4 is connected in series with a second manual power closing circuit, another group of contacts of the maintenance self-locking button SB4 is connected in series with the second manual power closing circuit, and a second automatic power closing circuit is connected to the second manual power closing circuit, and also includes a first power opening circuit, the second manual power closing circuit is connected to the second opening and closing motor M2, the first power opening circuit is connected to the first opening and closing motor M1, and a first power opening circuit is provided corresponding to the first opening and closing motor M1, the first power opening circuit is connected to the first power opening circuit, and also includes a second power closing circuit and a first power opening circuit connected in parallel to the second power circuit, the second power closing circuit is electrically connected to the second opening and closing motor M2, and the first power opening circuit is electrically connected to the first opening and closing motor M1. This device realizes the closing of the second power circuit 2 through the second opening and closing motor M2, and opens the first power circuit 1 connected to the first opening and closing motor M1, so as to realize the power supply of a single power source.

[0031] like Figure 3As shown, a normally open contact KM1-1 of a first power closing relay KM1 is connected in series between the first opening and closing motor M1 and the first power circuit 1, and a normally open contact KM2-1 of a second power opening relay KM2 is connected in series between the first opening and closing motor M1 and the second power circuit 2; a normally open contact KM3-1 of a second power closing relay KM3 is connected in series between the second opening and closing motor M2 and the second power circuit 2, and a normally open contact KM4-1 of a first power opening relay KM4 is connected in series between the second opening and closing motor M2 and the first power circuit 1.

[0032] The first manual power closing circuit includes the first manual power closing button SB1, which are connected in series with the first power stop button SB5, the normally open contact KM4-2 of the first power opening relay KM4, the normally closed contact KM3-2 of the second power closing relay KM3 and the coil of the first power closing relay KM1. The maintenance self-locking button SB4 is connected in series between the normally open contact KM4-2 of the first power opening relay KM4 and the normally closed contact KM3-2 of the second power closing relay KM3. The first manual power closing button SB1 is self-locked in parallel with the normally open contact KM1-2 of the first power closing relay KM1.

[0033] The first power automatic closing circuit includes a first power automatic closing button SB2, the output end of which is connected in series with the normally open contact KM2-2 of the second power opening relay KM2 and the coil of the first power automatic closing delay relay KT1, and the delay contact KT1-1 of the first power automatic closing delay relay KT1 is connected in parallel to the two ends of the first power manual closing button SB1. The first power closing circuit includes a first power closing photoelectric proximity switch Q3 and a coil of the first power closing relay KM8 connected in series to the first power circuit, and the normally closed contact KM8-1 of the first power closing relay KM8 is connected in series with the normally open contact KM1-1 of the first power closing relay KM1. When the first opening and closing motor M1 is in full closing position, the first power-on photoelectric proximity switch Q3 is triggered, the coil of the first power-on relay KM8 is energized, and the normally closed contact KM8-1 of the first power-on relay KM8 is disconnected, thereby achieving automatic power-off after the first opening and closing motor M1 is in full closing position.

[0034] The second power-off circuit includes the coil of the second power-off photoelectric proximity switch Q2 and the second power-off relay KM6 connected in series to the first power circuit 1. The first power-off circuit includes the normally closed contact KM3-3 of the second power closing relay KM3 and the coil of the first power-off relay KM4 connected in series with the first power stop button SB5. The second power-off circuit includes the coil of the second power-off photoelectric proximity switch Q2 and the second power-off relay KM6 connected in series to the first power circuit, and the normally closed contact KM6-1 of the coil of the second power-off relay KM6 is connected in series with the normally open contact KM4-1 of the first power-off relay KM4. When the second opening and closing motor M2 is in the opening position, the second power opening photoelectric proximity switch Q2 is triggered, the coil of the second power opening relay KM6 is energized, and its normally closed contact KM6-1 is disconnected, thereby realizing automatic power-off after the second opening and closing motor M1 is in the opening position.

[0035] In this embodiment, the second power manual closing circuit includes the second power stop button SB5 ， The second power manual closing button SB3, the normally open contact KM2-3 of the second power opening relay KM2, the normally closed contact KM1-3 of the first power closing relay KM1 and the coil of the second power closing relay KM3 are connected in series in sequence, the maintenance self-locking button SB4 is connected in series between the normally open contact KM2-3 of the second power opening relay KM2 and the normally closed contact KM1-3 of the first power closing relay KM1, and the second power manual closing button SB3 is self-locked in parallel with the normally open contact KM3-4 of the second power closing relay KM3.

[0036] The second power automatic closing circuit includes a second power automatic closing button SB2 ， , the second power automatic closing button SB2 ，The output end is connected in series with the normally open contact KM4-3 of the first power-off relay KM4 and the coil of the second power-off automatic closing delay relay KT2 in sequence, and the delay contact KT2-1 of the second power-off automatic closing delay relay KT2 is connected in parallel to the two ends of the first power-on manual closing button SB3. The second power-on closing circuit includes the second power-on closing photoelectric proximity switch Q4 connected in series to the first power circuit and the coil of the second power-off closing relay KM9, and the normally closed contact KM9-1 of the second power-off closing relay KM9 is connected in series with the normally open contact KM3-1 of the second power-on closing relay KM3. When the second opening and closing motor M2 is closed, the second power-on closing photoelectric proximity switch Q4 on the first power circuit is triggered, the coil of the second power-off closing relay KM9 is energized, and the normally closed contact KM9-1 of the second power-off closing relay KM9 is disconnected, so as to realize automatic power off after the second opening and closing motor M2 is closed.

[0037] The first power disconnect circuit includes a second power stop button SB5 ， The normally closed contact KM1-4 of the first power closing relay KM1 and the coil of the second power opening relay KM2 are connected in series in sequence. The first power opening circuit includes the first power opening photoelectric proximity switch Q1 and the coil of the first power opening relay KM7 connected in series on the second power circuit, and the normally closed contact KM7-1 of the first power opening relay KM7 is arranged in series with the normally open contact KM2-1 of the second power opening relay KM2. When the first opening and closing motor M1 is in the opening position, the first power opening photoelectric proximity switch Q1 is triggered, the coil of the first power opening relay KM7 is energized, and its normally closed contact KM7-1 is disconnected, so as to realize automatic power off after the first opening and closing motor M1 is in the opening position.

[0038] This embodiment has three working modes, namely manual mode, automatic mode and maintenance mode, which are described in detail as follows.

[0039] Manual Mode:

[0040] The first power stop button SB5, the normally closed contact KM3-3 of the second power closing relay KM3, and the coil of the first power opening relay KM4 are in a circuit closed state, so the normally open contact KM4-2 of the first power opening relay KM4 is closed, the normally open contact KM4-1 of the first power opening relay KM4 is closed, the second opening and closing motor M2 is energized and reversed until the second power opening photoelectric proximity switch Q2 is triggered, the coil of the second power opening relay KM6 is energized, its normally closed contact KM6-1 is disconnected, and the second opening and closing motor M2 is disconnected from the AC power (i.e., the first power circuit 1).

[0041] When the mains (i.e., the first power circuit 1) is powered, the first power manual closing button SB1 is pressed, the coil of the first power closing relay KM1 is energized, all the normally open contacts of the first power closing relay KM1 are closed, and the normally closed contacts are disconnected, so that the first power manual closing button SB1 is self-locked through the normally open contact KM1-2 of the first power closing relay KM1; the normally closed contact KM1-3 of the first power closing relay KM1 is disconnected, and the circuit for controlling the forward rotation closing of the second opening and closing motor M2 is disconnected; the second power opening relay KM 2, the coil loses power, its normally open contact KM2-1 is disconnected, and the reversing circuit of the first opening and closing motor M1 is disconnected; the first opening and closing motor M1 is energized and rotates forward, driving the opening and closing screw 4 connected to it to rotate, driving the opening and closing slider 5 to move horizontally, to achieve closing, so that the mains power (that is, the first power circuit 1) and the load circuit are connected. When the closing is in place, the first power closing in place photoelectric proximity switch Q3 is triggered, and the normally closed contact KM8-1 of the first power closing in place relay KM8 is disconnected, realizing automatic power off after the first opening and closing motor M1 is closed in place.

[0042] When the city power (i.e., the first power circuit 1) is cut off and the oil engine (i.e., the second power circuit 2) needs to be used for power supply, when the second power manual closing button SB3 is pressed, the coil of the second power closing relay KM3 is energized, all the normally open contacts of the second power closing relay KM3 are closed, and the normally closed contacts are disconnected, so that the second power manual closing button SB3 is self-locked through the normally open contact KM3-4 of the second power closing relay KM3; the normally closed contact KM3-2 of the second power closing relay KM3 is disconnected, which is used to The circuit controlling the first opening and closing motor M1 to rotate forward and close is disconnected; the second opening and closing motor M2 is powered and rotates forward, driving the opening and closing screw 4 connected to it to rotate, driving the opening and closing slider 5 to move and translate, realizing closing, so that the oil machine working (i.e., the second power circuit 2) is powered and the circuit of the load is connected. When the closing is in place, the second power closing photoelectric proximity switch Q4 is triggered, and the normally closed contact KM9-1 of the second power closing relay KM9 is disconnected, realizing the automatic power off of the second opening and closing motor M2 after closing. At the same time, the first opening and closing motor M1 automatically opens, and the opening process is similar to the opening process of the second opening and closing motor M2, which will not be described in detail here.

[0043] It can be seen that the mains power (i.e. the first power circuit 1) and the oil engine power supply (i.e. the second power circuit 2) are self-locking, and the two cannot be closed at the same time. If either side is closed, the other side will automatically open.

[0044] Automatic mode:

[0045] Through the analysis of the manual mode, it can be known that in the initial state, the coil of the second power disconnecting relay KM2 is in an energized state, so the normally open contact KM2-2 of the second power disconnecting relay KM2 is closed, and when the first power automatic closing button SB2 is pressed, the coil of the first power automatic closing delay relay KT1 is energized, and the delay contact KT1-1 of the first power automatic closing delay relay KT1 is closed, and the first power manual closing circuit is automatically turned on, and finally the AC power closing of the first opening and closing motor M1, the oil engine opening of the first opening and closing motor M1, and the opening process of the second opening and closing motor M2 are realized, which are similar to the manual mode and will not be described in detail here.

[0046] Maintenance mode:

[0047] When the maintenance self-locking button SB4 is pressed, the oil engine working and the mains closing circuits are disconnected, and the oil engine and the mains switches are in the open state. When the maintenance self-locking button SB4 is released, the oil engine and the mains return to normal working state.

[0048] The first power stop button SB5 and the second power stop button SB5， When the AC power or the oil generator is automatically disconnected, the two can be set as two independent buttons or as one button with multiple connection contacts.

[0049] When the first opening and closing motor M1 or the second opening and closing motor M2 is opened, the opening position is controlled by the corresponding photoelectric proximity switch. When the photoelectric proximity switch is turned on, the corresponding opening position coil is energized and the circuit is disconnected through its normally closed contact control circuit, thereby realizing the reverse stop of the first opening and closing motor M1 or the second opening and closing motor M2.

[0050] The present invention can realize automatic conversion of power supply to the load by the first power circuit 1 and the second power circuit 2 through the device. The control element arrangement and circuit connection of the first opening and closing control device and the second opening and closing control device, which are the main internal switching components, are the same. The two are detachable and interchangeable, and one of them can be selected for independent use. In addition, when installed on different switch plastic shells, the opening and closing screw 4 of appropriate length can be selected according to the size of the switch plastic shell for assembly and installation. It is easy to install, has strong compatibility, reliable structure, and is not limited by the installation space. Therefore, the switch has strong versatility and low price.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An external automatic switching dual power switch device, electrically connected to a first power circuit and a second power circuit respectively, including a mounting bracket, characterized in that: Two opening and closing screws arranged in parallel are rotatably mounted on the mounting bracket, and a first opening and closing motor and a second opening and closing motor correspondingly connected to the two opening and closing screws are also mounted in parallel on the mounting bracket, the first opening and closing motor is respectively connected in series to the first power circuit and the second power circuit, and the second opening and closing motor is respectively connected in series to the first power circuit and the second power circuit, and an opening and closing slider corresponding to the thread of each opening and closing screw is installed at the upper limit of the mounting bracket, wherein a first opening and closing control device is detachably mounted on one of the opening and closing sliders, and a second opening and closing control device is detachably mounted on the other opening and closing slider, the first opening and closing control device and the second opening and closing control device are interlocked and electrically connected, and also include a maintenance self-locking button, and the first opening and closing control device and the second opening and closing control device are respectively electrically connected to the maintenance self-locking button; The first opening and closing control device comprises a first opening and closing housing, a first power stop button is installed on the first opening and closing housing, a group of contacts of the first power stop button is connected in series with a first power manual closing circuit, a group of contacts of the maintenance self-locking button is connected in series with the first power manual closing circuit, a first power automatic closing circuit is connected to the first power manual closing circuit, and also comprises a second power opening circuit, the first power manual closing circuit is connected to the first opening and closing motor, the second power opening circuit is connected to the second opening and closing motor, and also comprises a first power closing circuit and a second power opening circuit connected in parallel to the first power circuit, the first power closing circuit is electrically connected to the first opening and closing motor, and the second power opening circuit is electrically connected to the second opening and closing motor; The second opening and closing control device comprises a second opening and closing housing, a second power stop button is installed on the second opening and closing housing, a group of contacts of the second power stop button is connected in series with a second power manual closing circuit, another group of contacts of the maintenance self-locking button is connected in series with the second power manual closing circuit, a second power automatic closing circuit is connected to the second power manual closing circuit, and also comprises a first power opening circuit, the second power manual closing circuit is connected to the second opening and closing motor, the first power opening circuit is connected to the first opening and closing motor, and also comprises a second power closing circuit and a first power opening circuit connected in parallel to the second power circuit, the second power closing circuit is electrically connected to the second opening and closing motor, and the first power opening circuit is electrically connected to the first opening and closing motor; A normally open contact KM1-1 of a first power closing relay KM1 is connected in series between the first opening and closing motor and the first power circuit, and a normally open contact KM2-1 of a second power opening relay KM2 is connected in series between the first opening and closing motor and the second power circuit; a normally open contact KM3-1 of a second power closing relay KM3 is connected in series between the second opening and closing motor and the second power circuit, and a normally open contact KM4-1 of a first power opening relay KM4 is connected in series between the second opening and closing motor and the first power circuit; The first power-on circuit comprises a first power-on photoelectric proximity switch Q3 and a coil of a first power-on relay KM8 connected in series to the first power circuit, and a normally closed contact KM8-1 of the first power-on relay KM8 is connected in series with a normally open contact KM1-1 of the first power-on relay KM1; The second power-off circuit comprises a second power-off photoelectric proximity switch Q2 and a coil of a second power-off relay KM6 connected in series to the first power circuit, and a normally closed contact KM6-1 of the coil of the second power-off relay KM6 is connected in series with a normally open contact KM4-1 of the first power-off relay KM4; The second power-on circuit comprises a second power-on photoelectric proximity switch Q4 and a coil of a second power-off relay KM9 connected in series to the first power circuit, and a normally closed contact KM9-1 of the second power-off relay KM9 and a normally open contact KM3-1 of the second power-on relay KM3 are connected in series; The first power-off circuit includes a first power-off photoelectric proximity switch Q1 and a coil of a first power-off relay KM7 connected in series to the second power circuit, and a normally closed contact KM7-1 of the first power-off relay KM7 and a normally open contact KM2-1 of the second power-off relay KM2 are arranged in series.

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