A motor pre-start ventilation control system
A technology for control systems and hosts, applied in general control systems, control/adjustment systems, computer control, etc., to achieve the effects of low power consumption, improved work efficiency, convenient installation, use, and maintenance
Active Publication Date: 2016-04-06
宜昌兆峰自动化仪表有限责任公司
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Problems solved by technology
[0002] In the prior art, the pneumatic purging system mostly adopts timer-type control mode, and there is no one that is specially used in hazardous areas with explosive gas mixtures, for example, in areas containing IIA, IIB and IIC, and T1~T5 Purge (ventilation) control system used in the atmosphere of explosive gas mixture in zone 1 and zone 2 formed by the mixture of explosive gas or vapor and air
Method used
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Embodiment Construction
[0023] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0024] The system structure diagram of the motor pre-start ventilation control system is as follows: figure 1 shown. The system consists of air flow transmitter 1, motor cavity pressure transmitter 2, pipeline pressure transmitter 3, control system host 4, air pipeline solenoid valve 5, air decompression filter 6, system control box 7 , an air flow regulating ball valve 8 and an air outlet 9. The air flow adjustment ball valve and the air outlet are respectively installed on two opposite side walls of the system control box, and the air decompression filter, the air pipeline solenoid valve, and the pipeline pressure filter are connected in sequence between the air flow adjustment ball valve and the air outlet. transmitters and air flow transmitters. The flow of air between the air flow adjustment ball valve and the air outlet is the direction indicate...
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The invention relates to a motor pre-boot ventilation control system. The system consists of an air flow transmitter, a motor cavity pressure transmitter, a pipeline pressure transmitter, a control system host, an air pipeline electromagnetic valve, an air pressure reduction filter, a system control box body, an air flow regulating ball valve and a gas outlet; the air flow regulating ball valve and the gas outlet are respectively arranged on two opposite side walls of the system control box body; and the air pressure reduction filter, the air pipeline electromagnetic valve, the pipeline pressure transmitter and the air flow transmitter are sequentially connected between the air flow regulating ball valve and the gas outlet. According to the ventilation control system, by forcedly ensuring a great quantity of clean air to flow through a motor cavity before a motor is started, an explosive gas mixture which possibly exists in a motor is taken out or the concentration of the explosive gas mixture is reduced to below the explosion limit and a motor start signal is given after the blowing requirement is reached, so that the explosion is effectively stopped.
Description
technical field [0001] The invention relates to the technical field of integrated control in an explosive gas mixture environment, in particular to a motor pre-start ventilation control system. Background technique [0002] In the prior art, the pneumatic purging system mostly adopts timer-type control mode, and there is no one that is specially used in hazardous areas with explosive gas mixtures, for example, in areas containing IIA, IIB and IIC, and T1~T5 The purging (ventilation) control system used in the explosive gas mixture environment of zone 1 and zone 2 formed by the mixture of explosive gas or vapor and air. With the rapid development of the petrochemical industry, more and more areas in which the electric companion is used belong to the aforementioned hazardous areas with explosive gas mixtures. If the explosive gas mixture that may exist in the motor cannot be taken out or Reducing its concentration below the explosion limit will cause the risk of explosion. T...
Claims
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IPC IPC(8): G05B19/042
Inventor 熊章华张兆峰
Owner 宜昌兆峰自动化仪表有限责任公司