Uninterruptible power supply for positive pressure explosion-proof room

Abstract

The utility model relates to the field of explosion-proof electrical and uninterruptible power supplies, and provides an uninterruptible power supply for a positive-pressure explosion-proof room, which comprises an explosion-proof battery box, an explosion-proof cut-off switch and a charge-discharge and inversion device, and is characterized in that a battery is arranged in the explosion-proof battery box, so that the protection performance and the safety performance of the battery are improved, and the safety of the battery is improved; an explosion-proof type cut-off switch controlled by a positive voltage control device is additionally arranged between a battery and a charge-discharge and inversion device, battery electric energy output of the uninterruptible power supply can be controlled according to opening and closing and tripping signals sent by the positive voltage control device, and the explosion-proof type cut-off switch is installed in an explosion-proof type electric box. The requirement of safe working in a dangerous gas environment area can be met, and the charging and discharging functions and the state monitoring of the battery are realized by the charging and discharging and inversion device. According to the utility model, safe work of the power supply in a dangerous gas environment can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof electrical and uninterruptible power supply, in particular to a novel explosion-proof uninterruptible power supply. Background Art

[0002] An uninterruptible power supply (UPS) is a system that connects a battery to a host computer and converts DC power into AC power through modular circuits such as the host inverter. It is primarily used to provide a stable, uninterrupted power supply to a single computer, a computer network system, or other power electronic devices such as solenoid valves and pressure transmitters.

[0003] The operating characteristics of a general uninterruptible power supply (UPS) are clearly inconsistent with explosion-proof technical standards when explosive hazardous gases are present in the operating environment. First, its own safety level (EPL) does not meet explosion-proof technical requirements. Second, when the gas detection device detects that the concentration of combustible gas exceeds the standard, the power supply system cuts off the power supply to non-explosion-proof power supply equipment (such as computers), and the UPS immediately supplies power to such equipment again, increasing the risk of explosion and easily causing a combustion and explosion accident. Summary of the Invention

[0004] The purpose of this utility model is to solve the problems existing in existing products by improving the protection safety level (EPL) of the battery and using an uninterruptible power supply controlled by a positive pressure control device of a positive pressure explosion-proof room, so that the present invention can meet the safety requirements of a positive pressure room used in an explosive gas environment.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An uninterruptible power supply for use in a positive pressure explosion-proof room comprises an explosion-proof battery box (1), an explosion-proof disconnect switch (2), and a charging, discharging and inverter device (3). The battery is installed in the explosion-proof battery box to improve the protection performance and safety performance of the battery itself. The explosion-proof disconnect switch controlled by a positive pressure control device is added between the battery and the charging, discharging and inverter device, and can control the battery power output of the uninterruptible power supply according to the opening, closing and tripping signals issued by the positive pressure control device. The explosion-proof disconnect switch is installed in a flameproof electrical box to meet the requirements for safe operation in a hazardous gas environment zone 1. The charging, discharging and inverter device realizes the charging, discharging and inverter functions of the battery.

[0007] An uninterruptible power supply for use in a positive pressure explosion-proof room, wherein an explosion-proof cut-off switch (2) is added between an explosion-proof battery box (1) and a charging, discharging and inverter device (3) for cutting off the battery power output when explosive hazardous gas enters the room protected by the positive pressure and the concentration reaches a set value.

[0008] An uninterruptible power supply for use in a positive pressure explosion-proof room, wherein an explosion-proof cut-off switch (2) for cutting off battery output is controlled by a positive pressure control box in the positive pressure room, so that after air replacement in the positive pressure explosion-proof room is completed, the battery circuit of the uninterruptible power supply is connected upon receiving a signal from a positive pressure control device in the positive pressure explosion-proof room, and the battery circuit of the uninterruptible power supply is cut off upon receiving a signal from the positive pressure control device when the concentration of explosive hazardous gas in the positive pressure explosion-proof room reaches a set value.

[0009] An uninterruptible power supply for use in positive pressure explosion-proof rooms, with an integrated or split appearance. All uninterruptible power supplies composed of this structure fall within the scope of the requirements of this document.

[0010] Compared with the existing technology, the advantages and positive effects of the present invention are:

[0011] 1. In the present invention, the battery is installed in an explosion-proof battery box to improve its safety level and meet the requirements for use in hazardous zone 1 or hazardous zone 2 in explosive gas environments.

[0012] 2. In this utility model, an explosion-proof disconnect switch is added between the explosion-proof battery box and the battery charging, discharging, and inverter device. This disconnect switch is installed in the flameproof electrical box. This allows the uninterruptible power supply to be controlled by the positive pressure control device in the positive pressure explosion-proof room. This can cut off the output of the uninterruptible power supply if explosive and hazardous gases enter the positive pressure room.

[0013] 3. In this utility model, the flameproof battery control box can perform remote opening and closing operations and shunt tripping. Switches within the flameproof box can be opened, closed, and tripped in the event of a fault without opening the box. Charging and discharging of the uninterruptible power supply is permitted only when the explosive gas concentration in the positive pressure explosion-proof room is below a set value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural block diagram of an uninterruptible power supply for use in positive pressure explosion-proof rooms proposed by the utility model. DETAILED DESCRIPTION

[0015] The utility model adopts the following technical solutions:

[0016] An uninterruptible power supply for use in a positive pressure explosion-proof room comprises an explosion-proof battery box (1), an explosion-proof disconnect switch (2), and a charge-discharge and inverter device (3). The battery is installed in the explosion-proof battery box (1) to improve the protection and safety performance of the battery itself. An explosion-proof disconnect switch (2) controlled by a positive pressure control device is added between the battery and the charge-discharge and inverter device, and can control the battery power output of the uninterruptible power supply according to the opening and closing and tripping signals issued by the positive pressure control device. The explosion-proof disconnect switch (2) is installed in a flameproof electrical box, which can meet the requirements of safe operation in a hazardous gas environment zone 1. The charge-discharge function and status monitoring of the battery are realized by the charge-discharge and inverter device. The appearance is integrated or split. Uninterruptible power supplies using this structure all fall within the protection scope of the present invention.

[0017] The invention includes installing the battery in a flameproof or increased safety explosion-proof battery box (1), thereby increasing the safety level of the battery itself and meeting the requirements of the explosion-proof technical standards. A controlled explosion-proof disconnect switch (2) is added between the battery box and the battery charging, discharging and inverter device (the switch is installed in the flameproof electrical box) to realize that when explosive gas appears in the positive pressure explosion-proof room, the positive pressure control device of the positive pressure explosion-proof room sends a disconnect signal, and while cutting off the power supply of the ordinary electrical equipment in the positive pressure explosion-proof room, it also cuts off the output of the battery in the uninterruptible power supply, so that the ordinary electrical equipment and the charging, discharging and inverter device of the uninterruptible power supply in the room are not energized.

[0018] As a preferred embodiment, the battery is installed in a flameproof box or an increased safety box to increase the safety level EPL of the battery.

[0019] By adopting the above scheme, the battery can be installed in a flameproof box (for batteries that do not generate gas leakage during charging and discharging) to meet the safety requirements for use in a hazardous zone 1 environment with explosive gas. Alternatively, the battery can be installed in an increased safety box (for batteries that generate gas leakage during charging and discharging) to meet the safety requirements for use in a hazardous zone 2 environment with explosive gas.

[0020] As a preferred embodiment, an explosion-proof disconnect switch (2) is added between the battery box and the battery charging, discharging and inverter device (3), and the explosion-proof disconnect switch (2) is installed in the flameproof electrical box, and the opening and closing mechanism and the tripping coil of the switch are connected to the positive pressure control device of the positive pressure explosion-proof room, so that the uninterruptible power supply is controlled by the positive pressure control device of the positive pressure explosion-proof room.

[0021] By adopting the above scheme, an explosion-proof disconnect switch (2) is added between the battery box and the battery charging, discharging and inverter device (3), and the explosion-proof disconnect switch (2) is installed in the flameproof electrical box. The opening and closing signals and the tripping line number are connected to the explosion-proof disconnect switch (2) from the positive pressure control device of the positive pressure explosion-proof room, so that the uninterruptible power supply is controlled by the positive pressure control device of the positive pressure explosion-proof room. At the same time, the safety level of the device can be used in the explosive gas environment danger zone 1.

[0022] As a preferred embodiment, the explosion-proof battery control box is controlled by the positive pressure control box of the positive pressure explosion-proof room, so that the uninterruptible power supply is put into operation when the concentration of explosive gas in the positive pressure room is lower than the set value or (and) after the gas in the room is properly replaced.

[0023] With the above solution, the explosion-proof battery control box should have remote opening and closing functions and a shunt trip function. By adding an electric opening and closing operating device and a shunt trip to the explosion-proof disconnect switch within the explosion-proof battery control box, when the positive pressure control device in the positive pressure explosion-proof room detects that the concentration of explosive gas in the room has reached a set value, it sends a signal to the uninterruptible power supply to stop power output. Upon receiving the cutoff signal from the control device, the uninterruptible power supply cuts off the battery power output. When the positive pressure control device in the positive pressure explosion-proof room completes air replacement in the room, it signals the uninterruptible power supply to operate normally and supplies power to the uninterruptible power supply. At this time, the uninterruptible power supply connects to the battery circuit, charging the battery and preparing to supply power to the outside in the event of a main power failure. To ensure that this function is fully controlled by the positive pressure control device in the positive pressure explosion-proof room, the operating power and control signals of the electric opening and closing operating device and the shunt trip are provided by the positive pressure control device in the positive pressure explosion-proof room.

Claims

1. An uninterruptible power supply for use in a positive pressure explosion-proof room, comprising an explosion-proof battery box (1), an explosion-proof disconnect switch (2), a charging, discharging and inverter device (3), characterized in that: The battery is installed in an explosion-proof battery box to improve the protection and safety performance of the battery itself. An explosion-proof cut-off switch controlled by a positive pressure control device is added between the battery and the charging, discharging and inverter device. The explosion-proof cut-off switch (2) for cutting off the battery output is controlled by the positive pressure control box in the positive pressure room. After the air replacement in the positive pressure explosion-proof room is completed, the battery circuit of the uninterruptible power supply is connected after receiving a signal from the positive pressure control device of the positive pressure explosion-proof room. When the concentration of explosive hazardous gas in the positive pressure explosion-proof room reaches a set value, the battery circuit of the uninterruptible power supply is cut off after receiving a signal from the positive pressure control device. The explosion-proof cut-off switch is installed in a flameproof electrical box, which can meet the requirements for safe operation in a hazardous gas environment zone 1. The charging, discharging and inverter device realizes the battery charging and discharging function and status monitoring.

2. The uninterruptible power supply for use in a positive pressure explosion-proof room according to claim 1, characterized in that The appearance is one-piece or split.

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