Analysis and completion of mine wind control computer control system

The dynamic adjustment system dynamic adjustment system consists of two sub-modules: network solution and network air volume adjustment. These two modules are the same as the general ventilation network solution and the mathematical model of the network air volume adjustment module. The network solution uses the iterative method, and the air volume adjustment uses the loop calculation method, but it has its particularity. The performance is: the main control module does not allow In the design, the network structure can be changed and the ventilation equipment can be selected according to the results of the network solution. Instead, the original equipment in the network and the appropriate ventilation structure are used to control the wind flow in the network to meet the requirements of the manager; The module can respond to changes in the network and can be solved and adjusted with new data files generated by the ventilation network change; in the preferred sub-module of the airflow control and control scheme, the self-regulation of the fixed flow lane is adopted (scheme Primary selection) and optimization of airflow control (scenario preference). Make sure that the resistance adjustment is generally used under the existing fan operating conditions.

In order to ensure the validity of network data and improve the running speed of software, VSM software has developed the following principles for the establishment and maintenance of network databases, and preprocesses network data: (1) Principle of minimum change: increase and deletion of air ducts At the time, the wind channel data (airway number, starting node number, wind tunnel name, etc.) of the network has the smallest change; (2) the principle of unique continuity: the ventilation network air duct and node number are unique and sequential; (3) go large The principle of staying small: When the air duct is deleted, as the node is deleted, the smaller air duct number connected to this node is retained, and the large air passage number is removed.

The fan database database database is the storage of network fan and various small auxiliary fan and local fan parameter data for adjustment. It provides the characteristic curve and solution parameters of the corresponding fan for network solution and network adjustment, and transmits the adjustment result back. database system. The fan database contains the ventilator characteristic parameter table, the non-wind wall auxiliary fan characteristic parameter table and the main parameter table of the ventilator. For some types of well-defined fields, the VSM gives the optional data in the form of a pull-down list box. For example, the main parameter list of the fan includes the fan model, air volume, wind pressure, speed, efficiency, rated power, actual power, air leakage, air leakage rate and other fields. The VSM provides the main parameters of the domestic 707 fans, so users only need to choose their own needs. The data can be. This avoids the errors that can be caused by the input of these fields.

Ventilation Network Diagram Drawing a ventilation network perspective is a diagram commonly used in mine ventilation management. It can visually reflect the relationship between mine ventilation network nodes and air ducts. However, it is not appropriate to draw the mine ventilation network map completely on an absolute scale. In some underground mines, especially deep wells, the height of the wellbore in the Z-axis direction from the surface to the first middle section is quite different from the height between the middle sections. If the same scale is used in the Z-axis direction, the layout of the graphics is often unreasonable, and the emphasis of the drawings, that is, the relationship between the middle segments is not prominent enough. Since the focus of the mine ventilation network map is to reflect a mutual positional relationship of the ventilation system, a method for drawing a pseudo-stereoscopic map of the ventilation network by the hierarchical method is established in the VSM.

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