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Method for replacing coal mine main fan without blowing-down on basis of adjustable moving blades

A ventilator and fan technology, which is used in mine/tunnel ventilation, mining equipment, earth-moving drilling, etc., can solve the problems of wind stop, jam, switch not in place, etc., to ensure safety, prevent machine failure, and air volume The effect of a smooth transition

Inactive Publication Date: 2014-06-25
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method based on the adjustable moving blades of the coal mine main ventilator without stopping the wind, which solves the problem of stopping the wind during the blowing period of the fan; , eliminating the air-to-air auxiliary damper, thereby solving the problems caused by jamming and improper switching when opening and closing the auxiliary damper

Method used

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  • Method for replacing coal mine main fan without blowing-down on basis of adjustable moving blades
  • Method for replacing coal mine main fan without blowing-down on basis of adjustable moving blades
  • Method for replacing coal mine main fan without blowing-down on basis of adjustable moving blades

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Effect test

Embodiment 1

[0025] Embodiment 1: The non-stop wind reverse method: that is, the method of non-stop wind reverse from the running fan to the standby fan. During the normal reverse process, the operation of the two fans is always maintained to ensure the continuous supply of ventilation power; through Parallel air distribution makes the air volume stable during the reversing process and realizes non-stop wind reversing; when the normal operation fan fails, a comprehensive judgment is given through the vibration sensor, air volume negative pressure sensor, temperature sensor and motor electrical parameter sensor, and the fault is detected. Depending on the degree of abnormality, the fan will give an early warning, set a fault flag, and stop the wind until the fault mode is activated;

[0026] 1. Transition stage: under the premise that the running fan 1 is in normal operation, the backup fan 2 starts when the backup fan blade 4 is at zero angle, and the backup fan 2 transitions from a cold ba...

Embodiment 2

[0039] Embodiment 2: The core component of the device is a set of four-section keyboard-type console, and the peripheral sensors and control actuators are installed at the corresponding positions of the fan and its ancillary facilities; wherein, the keyboard-type console is placed in the centralized control room , the four panel layouts are computer display panel, fan and high-voltage cabinet indicator and control button panel, temperature and damper indicator and control button panel, and another hot standby computer display panel; the installation panel is arranged behind the console , on which are arranged power supply and lightning protection modules, one-use and one-standby soft redundant PLC and its remote I / O modules, isolation relays and wiring, and the two sides of each cabinet are terminal blocks connected to external sensors and actuators.

[0040] Figure 5 The hardware topology of the distributed system is shown. The non-stop wind blower control system is compose...

Embodiment 3

[0043] Embodiment 3: The core part of the device is a set of three-section control cabinet and a customized computer console that can place two industrial computers and displays, and the peripheral sensors and control actuators are installed at the corresponding positions of the fan and its auxiliary facilities; wherein, The computer console is placed in the centralized control room, and the control cabinet is placed in the low-voltage power distribution room. The two communicate through Ethernet. The layout of the three panels of the control cabinet is the No. 1 main control screen, the local display touch screen, and the No. 2 standby master control panel. screen; the fan, damper and high-voltage cabinet indicators and control buttons are arranged on the control panel, the indicator buttons are arranged on the top, and the control buttons are arranged on the bottom, which is convenient for users to operate. Control: the inner side of the lower part of the cabinet is equipped ...

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Abstract

The invention provides a method for replacing a coal mine main fan without blowing-down on the basis of adjustable moving blades, and belongs to switching methods for coal mine main fans and standby fans. According to the method, in the normal fan-replacement process, two fans keep operating all the time, so that it is guaranteed that ventilation power is continuously provided; parallel connection is adopted for wind separation, the air volume is stable in the fan-replacement process, and fan replacement without blowing-down is achieved; when the fan operating normally breaks down, a synthetic judgment is given through a vibrating sensor, an air volume negative-pressure sensor, a temperature sensor and a motor electrical parameter sensor, according to abnormal degrees of the faulted fan, and early warning, placement of fault symbols and fault mode starting are sequentially carried out until fan replacement without blowing-down is achieved. The method has the advantages that fan replacement without blowing-down is achieved by means of adjustable moving blade capacity of the fans; in the whole fan-replacement process, adjustment of blade angles is combined adjustment of opening degrees of air doors, so that the air volume is adjusted; the possibility that unsmooth clamping occurs and the air doors do not reach fault points in place during opening and closing is reduced, meanwhile, the fan-replacement speed is quicken, and fan-replacement time is shortened.

Description

technical field [0001] The invention relates to a method for switching between a coal mine main ventilator and a standby ventilator, in particular to a coal mine main ventilator reversing method based on adjustable movable blades without stopping the wind. Background technique [0002] At present, the main ventilation fan in coal mine provides the main ventilation power source for mine ventilation, and its continuous and reliable operation is the key to maintaining reliable ventilation in coal mines and reducing the content of harmful gases such as underground gas. Coal mine air shafts are generally equipped with two fans, one for use and one for standby. However, the shutdown method stipulated in the traditional coal mine safety regulations is based on the safety considerations for ventilation facilities. It is necessary to stop the operation of the fan first, then switch the damper, and finally start the backup fan, resulting in The ventilation power of the mine is interru...

Claims

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Application Information

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IPC IPC(8): E21F1/00
Inventor 吴新忠马小平任子晖王巍
Owner CHINA UNIV OF MINING & TECH
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