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Method of reversing the main ventilator in coal mine without stopping the wind based on the adjustable movable blade

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: 2016-01-20
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 of reversing the main ventilator in coal mine without stopping the wind based on the adjustable movable blade
  • Method of reversing the main ventilator in coal mine without stopping the wind based on the adjustable movable blade
  • Method of reversing the main ventilator in coal mine without stopping the wind based on the adjustable movable blade

Examples

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Effect test

Embodiment 1

[0025] Example 1: The non-stop wind backing method: that is, the non-stop wind backing method from the running fan to the standby fan. During the normal backing process, the two fans are always kept running to ensure the continuous supply of ventilation power; Parallel air distribution makes the reverse process, the air volume stable, and realizes the non-stop wind reverse; when the normal running fan fails, the vibration sensor, the air volume negative pressure sensor, the temperature sensor and the electrical parameter sensor of the motor will give a comprehensive judgment to the failure According to the degree of abnormality, the fan will give an early warning, set a fault flag, and continue to wind down until the fault mode is activated;

[0026] 1. Transition stage: Under the premise of running fan 1 in normal operation, standby fan 2 is started at zero angle of standby fan blade 4, standby fan 2 transitions from cold standby to reliable hot standby, reaching the rated speed;...

Embodiment 2

[0039] Embodiment 2: The core component of the device is a set of four-section piano keyboard, peripheral sensors and control actuators are installed in the corresponding positions of the fan and its auxiliary facilities; wherein, the keyboard keyboard is placed in the centralized control room , Its four panels are arranged in order of computer display panel, fan and high-voltage cabinet indicator and control button panel, temperature and air door indicator and control button panel, and another hot standby computer display panel; the installation board is installed behind the console , On which are arranged power supply and lightning protection modules, one-use one-backup software redundant PLC and its remote I / O modules, isolation relays and wiring. The two sides of each cabinet are terminal blocks connected with external sensors and actuators.

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

Embodiment 3

[0043] Example 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. Peripheral sensors and control actuators are installed in the corresponding positions of the fan and its auxiliary facilities; among them, 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 via Ethernet. The three panel layouts of the control cabinet are the No. 1 main control screen, the local display touch screen, and the No. 2 standby main control. Screen; The control screen is equipped with indicator lights and control buttons for fans, dampers and high-voltage cabinets. The indicating buttons are placed on the top, and the control buttons are placed on the bottom, which is convenient for users to control. The on-site touch screen can realize the real-time view of the equipment operating status...

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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 a coal mine main ventilator and a backup ventilator, in particular to a coal mine main ventilator non-stop wind reversing method based on adjustable moving blades. Background technique [0002] At present, the coal mine main ventilator provides the main ventilation power source for the mine ventilation. Its continuous and reliable operation is the key to maintaining the reliable ventilation of the coal mine and reducing the content of harmful gases such as underground gas. Coal mine ventilation shafts are generally equipped with two fans, one for use and one for backup. However, the traditional coal mine safety regulations require the shutdown and reversal method based on safety considerations for ventilation facilities. It is necessary to first stop the operation of the fan, then switch the air door, and finally start the backup fan. The ventilation power of the mine is interrupted during the downtime, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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