Dual power supply switching device

Abstract

The utility model discloses a dual power supply power supply switching device belongs to power supply switching technical field. The device includes municipal network power input interface, UPS power input interface, manual switching mechanism, power output interface and state indicating unit. Municipal network and UPS power input interface are accessed external corresponding power respectively, and manual switching mechanism is connected between both and power output interface, is used for manual control power on, and state indicating unit shows power supply state. It can select municipal network power single power supply through manual switching mechanism, and this state can replace UPS without stopping. The device has no automatic switching circuit board, CPU and related circuit, and only relies on mechanical manual operation switching, avoids the hidden danger and energy consumption problem of frequent switching of automatic switching device, and municipal power and UPS dual power input can select which group of power to use preferentially, and the structure is simple and reliable, applicable to the scene of high requirement on power supply switching stability.

Description

Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a dual power supply switching device. Background Technology

[0002] In power supply systems, dual-power switching devices are often required to ensure the continuous operation of load equipment, enabling the switching between mains power and backup power (such as UPS power). Currently, most mainstream dual-power switching devices on the market employ automatic switching designs, relying on circuit boards, CPUs, and various sensors to monitor power status and automatically switch. However, these automatic switching devices have significant drawbacks in practical use. Frequent automatic switching based on real-time grid conditions can lead to aging of internal electronic components and loosening of solder joints over long-term operation, potentially causing malfunctions. If these automatic switching devices are used in large-scale power grids, overall energy consumption is high, and the devices generally have short lifespans. If multiple devices fail simultaneously, it can easily trigger large-scale power outages. When UPS power needs replacement or maintenance, existing automatic switching devices typically require shutdown, forcing load equipment to stop operation, severely impacting production or work continuity, and failing to meet the demands of scenarios requiring high power stability and continuity. Utility Model Content

[0003] This application provides a dual power supply switching device, including a mains power input interface, a UPS power input interface, a manual switching mechanism, a power output interface, and a status indicator unit; The mains power input interface and the UPS power input interface are respectively connected to the external mains power supply and the UPS power supply. The manual switching mechanism is connected between the two power input interfaces and the power output interface, and is used to manually control the mains power supply and the UPS power supply to conduct to the power output interface. The status indicator unit is connected to the input interfaces of the mains power supply and the UPS power supply to display the current power supply status. The manual switching mechanism can be used to select the mains power supply to supply power alone, and in this state, the UPS can be switched without stopping.

[0004] Furthermore, the manual switching mechanism includes at least one set of mechanical switch components. The mechanical switch components are provided with a first contact connected to the mains power input interface, a second contact connected to the UPS power input interface, and a moving contact connected to the power output interface. By operating the mechanical switch components, the moving contact can be selectively connected to the first contact or the second contact.

[0005] Furthermore, the status indication unit includes a first indicator light and a second indicator light. The first indicator light is connected in series in the line between the mains power input interface and the manual switching mechanism, and the second indicator light is connected in series in the line between the UPS power input interface and the manual switching mechanism.

[0006] Furthermore, it also includes a protection unit connected in series with the main line between the manual switching mechanism and the power output interface, which is used to cut off the circuit when the power supply line is overloaded or short-circuited.

[0007] Furthermore, the device does not include a circuit board for automatic switching control, a central processing unit, or related automatic control circuits; the power path is switched through manual operation.

[0008] Furthermore, the mechanical switch assembly is a rotary switch with markings on its surface corresponding to the mains power supply and the UPS power supply. Rotation can drive the moving contact to close with the first contact and / or the second contact.

[0009] Furthermore, both the mains power input interface and the UPS power input interface are equipped with terminals, which are respectively connected to the phase line and neutral line of the external power supply.

[0010] Furthermore, when the manual switching mechanism is in the state of mains power conduction, the path between the UPS power input interface and the power output interface is completely disconnected, forming an independent mains power supply circuit.

[0011] Furthermore, the power supply output interface is provided with output terminals for connecting external load devices.

[0012] Furthermore, the protection unit is an air switch or a fuse, whose rated current value matches the maximum power supply load of the device.

[0013] Beneficial effects This dual-power supply switching device effectively solves many problems of existing automatic switching devices through its manual switching mechanism design, offering significant advantages. First, the device eliminates the circuit boards, CPUs, and other electronic components required for automatic switching, relying solely on a mechanical structure for manual switching. This fundamentally avoids the potential for component aging and solder joint damage caused by frequent automatic switching, while significantly reducing energy consumption, extending overall lifespan, minimizing the risk of failure during large-scale use, and improving the stability of the power supply system. Second, the device can accept both mains power and UPS dual power inputs, allowing users to customize which power source is prioritized and manually select mains power for standalone operation. In this mode, UPS power can be switched without interrupting the load equipment, ensuring production or work continuity and solving the pain point of traditional devices requiring shutdown for UPS replacement. Third, the device's status indicator unit clearly displays the current power supply status, allowing operators to promptly grasp the power switching situation. The operation is convenient and easy to understand. Furthermore, the simple and reliable structural design, low manufacturing cost, and suitability for various scenarios requiring continuous power supply make it widely applicable and worthy of promotion. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 The circuit diagram of the dual power supply switching device provided in the embodiment of this utility model.

[0016] Figure descriptions: 1. Mains power input interface; 2. UPS power input interface; 3. Manual switching mechanism; 4. Power output interface; 5. Status indicator unit; 31. Relay. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0019] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0020] Example 1 Referring to the figure, the dual power supply switching device of this utility model disclosed in this embodiment mainly consists of a mains power input interface 1, a UPS power input interface 2, a manual switching mechanism 3, a power output interface 4, and a status indicator unit 5. The components are connected by wires to form a complete power supply switching circuit.

[0021] The mains power input interface 1 is used to connect to an external mains power source. It adopts a standardized terminal block structure, including a phase line input terminal and a neutral line input terminal, which are connected to the corresponding phase and neutral lines of the external mains power source, respectively. The phase line terminal 11 of the mains power input interface 1 connects to pins 12 of TM1 and TM2 in time relay 31, and the neutral line terminal 12 connects to pins 34 of TM1 and TM2, forming the initial circuit for mains power connection. The phase line terminal 21 of the UPS power input interface 2 connects to pins 12 of TM3 and TM4 in time relay 31, and the neutral line terminal 22 connects to pins 34 of TM3 and TM4, forming the initial circuit for UPS power connection. All connections are made using copper wires with a cross-sectional area adapted to the maximum load current of the power supply. Insulated crimp terminals are used at the interfaces to prevent loosening or short circuits.

[0022] UPS power input interface 2 is used to connect to an external UPS power supply. Its structure is the same as that of the mains power input interface 1, and it also has a phase line connection terminal and a neutral line connection terminal, which are connected to the phase line and neutral line of the UPS power supply respectively. The output terminal of UPS power input interface 2 is also connected to the other input terminal of manual switching mechanism 3 through a wire, forming a power supply path in parallel with the mains power supply.

[0023] In some embodiments, a dual-parallel power supply path is formed by the mains power input interface and the UPS power input interface. With the help of the coordinated control of time relays and manual switching mechanisms, users can customize the priority order of mains power or UPS power according to actual needs, so as to realize flexible configuration of power supply strategy.

[0024] In the manual switching mechanism 3, time relays 31 (TM1, TM2, TM3, and TM4) all use normally open contact designs. Their pins 7 and 8 are respectively connected to the contacts of each group of rotary switches. Each group of switches in the rotary switch group includes a common terminal and two selection terminals. The common terminal is connected to the input terminal of the load power supply branch 41 via a wire, and the two selection terminals are respectively connected to pin 7 (phase line side) and pin 8 (neutral line side) of the corresponding time relay. For example, the common terminal of the first row of switches in the rotary switch group is connected to the phase line input terminal of the load power supply branch 41, with selection terminal a connected to pin 7 of TM1 and selection terminal b connected to pin 7 of TM3; the common terminal of the second row of switches is connected to the neutral line input terminal of the load power supply branch 41, with selection terminal a connected to pin 8 of TM2 and selection terminal b connected to pin 8 of TM4; the third row of switches is the linkage control terminal, used to synchronously trigger the coil action of time relays 31, and its contacts are respectively connected to the coil power supply terminals of TM1, TM2, TM3, and TM4.

[0025] The power output interface 4 is used to connect to an external load device. Its input end is connected to the moving contact of the manual switching mechanism 3, and its output end is equipped with a wiring terminal or plug adapted to the load, which can be directly connected to the power interface of the load. A protective element is connected in series on the line between the power output interface 4 and the manual switching mechanism 3 to cut off the power supply path in case of load overload or line short circuit, thereby protecting the load and the device itself.

[0026] In the load power supply branch, the input terminal of the air circuit breaker is connected to the common terminal of the rotary switch group, and the output terminal is connected to the load. The air circuit breaker adopts a two-pole design, with its phase and neutral terminals respectively connected to the power input terminals of the load. When an overload or short circuit occurs in the circuit, the internal tripping mechanism of the air circuit breaker activates, disconnecting the load from the upstream circuit and achieving the protection function. The power interface of the load adopts a standardized design, compatible with the plug specifications of common electrical equipment.

[0027] The status indicator unit 5 displays the current power supply status, including a first indicator branch connected to the mains power input interface 1 and a second indicator branch connected to the UPS power input interface 2. The first indicator branch consists of a resistor and a LED connected in series, with its two ends connected to the phase line and neutral line of the mains power input interface 1, respectively. When the mains power is normally connected, the LED illuminates, indicating that the mains power is available. The second indicator branch has the same structure, with its two ends connected to the phase line and neutral line of the UPS power input interface 2. When the UPS power is normally connected, its LED illuminates, indicating that the UPS power is available. The two LEDs are designed with different colors, and their installation positions correspond to the "Mains" and "UPS" markings on the casing for easy visual differentiation.

[0028] In terms of specific connections, the phase line input terminal of the mains power input interface 1 is connected to the mains side stationary contact of the manual switching mechanism 3 via a wire, and simultaneously connected to the neutral line input terminal of the mains power input interface 1 via the first indicator branch; the phase line input terminal of the UPS power input interface 2 is connected to the UPS side stationary contact of the manual switching mechanism 3 via a wire, and simultaneously connected to the neutral line input terminal of the UPS power input interface 2 via the second indicator branch. The moving contact of the manual switching mechanism 3 is connected to the input terminal of the power output interface 4 via a protection element, and the output terminal of the power output interface 4 is connected to an external load, forming a complete power supply circuit.

[0029] When mains power is required, rotate the operating knob of the manual switching mechanism 3 to the "Mains" position. The moving contact closes with the mains-side stationary contact, and mains power is sequentially delivered to the load through the mains power input interface 1, the manual switching mechanism 3, the protection element, and the power output interface 4. At this time, the LED of the first indicator branch lights up, indicating the mains power supply status. In this state, the moving contact of the manual switching mechanism 3 is completely disconnected from the UPS-side stationary contact, and there is no electrical connection between the UPS power input interface 2 and the power output interface 4. The operator can directly disconnect the UPS power input interface 2 from the external UPS to replace or maintain the UPS. Throughout the process, the load is continuously powered by the mains power without shutdown.

[0030] When it is necessary to switch to UPS power supply, rotate the operation knob to the "UPS" position. The moving contact and the stationary contact on the UPS side will close. The UPS power will be delivered to the load in sequence through the UPS power input interface 2, the manual switching mechanism 3, the protection element, and the power output interface 4. At this time, the LED of the second indicator branch will light up to indicate the UPS power supply status.

[0031] The outer casing of this device is made of insulating and flame-retardant material. An internal support frame houses the mains power input interface 1, UPS power input interface 2, manual switching mechanism 3, power output interface 4, and status indicator unit 5, all secured to the frame with screws to ensure structural stability. All connecting wires are insulated and secured with clamps to prevent wear due to vibration. A safe distance is maintained between all live parts and the casing, and insulating partitions are installed in critical areas to prevent accidental electric shock.

[0032] Because the device does not have a circuit board, central processing unit, or related electronic components for automatic switching control, it achieves power switching solely through the mechanical action of the manual switching mechanism 3. This completely avoids the potential for malfunctions caused by frequent automatic switching in automatic switching devices, while also reducing energy consumption and extending the device's lifespan. Its simple structure and convenient operation allow for reliable dual-power switching and meet the requirement of replacing UPS without shutting down the system, making it suitable for scenarios with high requirements for power supply continuity.

[0033] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A dual power supply switching device, characterized in that, Includes mains power input interface, UPS power input interface, manual switching mechanism, power output interface and status indicator unit; The mains power input interface and the UPS power input interface are respectively connected to the external mains power and the UPS power. The manual switching mechanism is connected between the two power input interfaces and the power output interface, and is used to manually control the mains power and the UPS power to conduct to the power output interface. The status indicator unit is connected to the input interfaces of the mains power and the UPS power to display the current power supply status. The manual switching mechanism allows for the selection of a standalone power supply from the mains grid, enabling UPS replacement without shutting down the system.

2. The dual power supply switching device according to claim 1, characterized in that, The manual switching mechanism includes at least one set of mechanical switch components. The mechanical switch components are provided with a first contact connected to the mains power input interface, a second contact connected to the UPS power input interface, and a moving contact connected to the power output interface. By operating the mechanical switch components, the moving contact can be selectively connected to the first contact or the second contact.

3. The dual power supply switching device according to claim 1, characterized in that, The status indication unit includes a first indicator light and a second indicator light. The first indicator light is connected in series in the line between the mains power input interface and the manual switching mechanism, and the second indicator light is connected in series in the line between the UPS power input interface and the manual switching mechanism.

4. The dual power supply switching device according to claim 1, characterized in that, It also includes a protection unit, which is connected in series with the main line between the manual switching mechanism and the power output interface, and is used to cut off the circuit when the power supply line is overloaded or short-circuited.

5. The dual power supply switching device according to claim 1, characterized in that, The device does not include a circuit board for automatic switching control, a central processing unit, or related automatic control circuits; the power path is switched manually.

6. The dual power supply switching device according to claim 2, characterized in that, The mechanical switch assembly is a rotary switch with markings on its surface corresponding to the mains power supply and UPS power supply. Rotation can drive the moving contact to close with the first contact and / or the second contact.

7. The dual power supply switching device according to claim 1, characterized in that, Both the mains power input interface and the UPS power input interface are equipped with terminals, which are respectively connected to the phase line and neutral line of the external power supply.

8. The dual power supply switching device according to claim 1, characterized in that, When the manual switching mechanism is in the state of mains power conduction, the path between the UPS power input interface and the power output interface is completely disconnected, forming an independent mains power supply circuit.

9. The dual power supply switching device according to claim 1, characterized in that, The power output interface is equipped with output terminals for connecting external load devices.

10. The dual power supply switching device according to claim 4, characterized in that, The protection unit is an air switch or a fuse, and its rated current value is matched with the maximum power supply load of the device.

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