Research and Application of Automatic Monitoring Technology for Mixing Air Compressor

2 monitoring system constitutes 21 structural principle Piston-type air Xuji control system Shancheng's control system 蟪蠓 运 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 The principle of wind pressure and the principle of starting load rate are based on the same principle. The set value of the wind pressure is set by the control panel of the main control cabinet, and the undergraduate degree of on-site mining engineering. He is a master of engineering at China University of Mining and Technology. He is currently the deputy mine manager of Xinyi Coal Mine of Linyi Mining Group. He has studied and applied Bai Jingzhi in the influential automatic monitoring technology of hybrid air compressors. Wang Yongbao, Song Weitong's automatic control transformation and improvement of the fault alarm automatic protection and online monitoring function, the whole process to achieve separation of man and machine to ensure the system is intrinsically safe.

7 Document identification code 15 Xinyu Coal Mine air compressor operation and control system is a major part of the whole mine remote control and mine digital construction. The five empty boring machines of the mine are responsible for the safety and production of the whole mine for the wellhead loading and unloading of the wellhead winch system.

1 Operation status of the original air compressor system There are 5 air compressors in Xinyi Coal Mine, 3 piston air compressors installed in the basic construction period, simple control using contact relays; 2 turbines installed in the initial stage of production The air compressor is controlled by a single controller. The five air compressor cooling water systems are all water cooled.

The screw air compressor has a more advanced air compressor. It has the advantages of low noise, high reliability, high automation and easy maintenance. However, there are single-machine control in the control system, which can monitor the shortcomings of less power supply equipment and less protection functions.

The piston air compressor is a more traditional air compressor. It has been used by some enterprises because of its high adaptability, high thermal efficiency, and low power consumption. However, its control system is relatively backward, wasting energy, and frequent failures. Maintenance is difficult. It is more difficult to meet the requirements of production.

The air compressor cooling water system adopts forced circulation water cooling method, and the air compressor water is manual. The accuracy of the system pressure 1 off is more accurate. The point drifts from the drift; the instantaneous fluctuation of the water pressure will cause the switch action. When the water pressure repeatedly fluctuates at the first point of the control, the electric contact will be repeatedly turned on and off, causing the water raft to repeatedly start and stop. As a result, the control fails and the failure rate is high.

In view of the above-mentioned shortcomings of the same press control system and the coexistence of the new dry rock screw type and piston type air machine models. The automatic monitoring system of the air compressor is designed.

The piston air compressor power circuit increases the frequency converter link, so that the system can realize the air compressor to dynamically adjust the air volume.

The power circuit of the piston air compressor increases the power switching cabinet, thereby realizing the drag frequency conversion function.

Piston air compressor increases the discharge pressure, pressure, wind pressure, pressure, oil pressure, cooling water, water pressure detection transmitter.

Piston air compressor increases the temperature of the exhaust air temperature, air temperature, lubricating oil temperature, cooling water, water inlet and outlet temperature detection sensor.

Screw type air 1 machine high pressure 6 said loop to increase solid state soft start 1. High 1 switch cabinet makes the system have a soft start function. And high-voltage motor microcomputer protection module.

7 软 软 soft start 桁 is faulty. The system switches to direct power frequency operation mode.

System, plus high-pressure switch cabinet for screw air compressor.

The screw air compressor hardware device such as the corresponding plug and sensor is added to increase the intake differential pressure analog sensor of the intake system, and the air cooler outlet pressure transmitter realizes the dynamic monitoring of the intake system; the oil and gas separator is monitored to monitor the differential pressure sensor. Dynamically detect the status of the separator and pre-warn the blockage of the filter element in advance. 1.

I host machine 1 factory heart network 3,5 air compressor 2,1 start 嫘 start presses Under normal circumstances, two screw air compressors use mutual standby drive piston type compressor to supplement the wind supply The control system is able to vary depending on the pressure and the state of the frequency converter. 1 Dynamic adjustment piston Japanese machine failure system can automatically switch to the piston type medium pressure machine hunger control system. If the piston air compressor unit fails, or the table screw air compressor and the piston air compressor can not meet the requirements of the on-site wind operation at the same time, the system can be soft-started and the other spare screw machine 3 technical key screw The high-pressure soft starter control of the air compressor unit, and the parameter setting of the data acquisition unit of the diamond controller.

The piston air compressor unit is transformed into 10 controllers for the frequency conversion speed control logic control system data acquisition and processing upload parameters to set the cooling water automatic water inlet and outlet and circulation control.

4 sprinkle door, negative 300 series only 1 矣 now piston air compressor and screw air compressor hybrid model joint control.

4 The application situation proves that the flexible supply 4 control technology supplemented by the screw air compressor as the main piston air compressor is not only energy saving and environmental protection. And 1 realizes the closed-loop control of the wind pressure of the system capacity and the supply air volume continuously and dynamically, improves the air supply quality of the air compressor, and provides guarantee for the safe production of the enterprise.

After the 5th reconstruction, the monitoring system greatly improves the level of automation compared with the condition of the original system. Reducing equipment, damage and maintenance workload saves manpower and material resources and improves safety and reliability.

Before the system design of the air compressor running speed is rated speed, the air compressor room has staff on duty. After the system transformation, the air compressor room is unattended, and the control room is connected to the high and low level on page 166. The limit is determined by comparing 10 with the positive end point, and the size of the inflection point after that is the first low limit to the high limit setting. 2 in turn. All the inflection point changes are made to the lower limit. For example, the low-low-high-transmission function is followed by all the serpentine lines that are connected to the 1st, 0; kiss basis until the new horizontal transmission is called 1. 4 The instrument car change line is unchanged to low, high, low, high, low, high. If in the serpentine shape, because the adjacent lines are not uniform, the distance is too large, or the terrain is unfavorable, then it is necessary to select the appropriate interpolation in the two lines. 12. Yang solves. The mountain 1 is like the snake part of the 3 deductions. Whether the high and low limits and the direction of the mountain are still based on the original positive arrangement 1 is the basis. If the answer is no, it must be based on the newly interpolated 3 and 1 work. . And provide a serpentine; 1; to note the total foot serpentine arrangement interpolated 1 its high and low end direction is discriminated, if the interpolation is in the work, 3 placed on the side line. This requires high and low end reverse connection, and vice versa.

4 Conclusion in the field work. Due to the difficulty of the terrain and the layout of the multi-field measurement line of the equipment, it should be adapted to the local conditions and change according to the shape; in order to facilitate the operation, it is fast and effective. Theoretically, as long as the line of any shape direction does not constitute a loop, it can be decomposed into a combination of the above simple types, and an effective alignment can be formed by a reasonable definition. In short, in the actual operation, no matter how complicated the layout is to apply the most basic setting rules, the operator can make it simple and easy to complete the collection work as long as the basic rules are tightly grasped.

Numerical analysis of floor rupture under ascending mining conditions Yan Wei, Guo Yanpei, Xu Xichun Liang Yao Shandong Coal Technology Wood Service Co., Ltd., Jinan 250032, Shandong, China, It is concluded that the application of 0 for upward mining analysis is a safe, mine, safety Production can provide a reference.

Mining coal seams, 71 mining coal seam stratification or coal group 7 mining coal seam stratification or coal group called up mining. This is a mining method with a special mining order, so it is also called anti-procedural mining. In some mining areas or mines, there are many coal seams abandoned above the goaf. For these discarded coal resources, only a small amount of roadway engineering can be added for recycling.

1 The choice of numerical simulation tools 1.0 The superiority of the analog software 0 is to use the explicit solution method for the stability analysis of the joint rock slope, which is convenient for the progressive damage analysis and fire deformation motion of the block slope. These advantages are very good, which is beneficial to its application to mining engineering. It can perform static and dynamic analysis of deep underground mining chambers, such as fracture slip induced by simulated surrounding rock failure; mortar blasting impact; earthquake induced fault slip; And various rock reinforcement systems.

1.2 Based on 0 simulation of the effectiveness of up-draw mining can be applied to mining engineering numerical simulation software, such as 叼3, 鹊龋, 局, 捎梅, numerical simulation of up mining, based on the following two reasons 1 The impact of the upper coal roof caving on the bottom plate is affected. During the mining process, the stability of the coal seam floor caused by the two strong mining forces has been seriously damaged, and the basic top pressure is considered. The phenomenon of direct top suspension, at this time the impact of the upper layer on the upper coal floor has been negligible.

The advantage of the discrete element method is that it has inherent advantages in solving the top-down. 1 Allows the discrete block to undergo limited displacement and rotation, including complete detachment, and automatically identifies the new university during the calculation process. Working in the coal-technical section of Shandong Province, the public has a small impact on the coal shovel technology, and the strong impact caused by the two mining. 1.1 疋, 1 丁 丁 is a good reflection of the impact of the upper coal roof slab on its bottom plate.

2 Reflecting the deformation characteristics of the upper coal seam floor; ascending, mining destroys the original stress-balance state of the overlying strata in the mining face, causing the redistribution of rock mass stress. When the stress after redistribution exceeds the ultimate strength of the original rock, it will inevitably cause lateral and longitudinal deformation and damage along the foot. It is known from a large number of on-site data that the overlying rock mass in the stope can be divided into a vertical zone with a fissure zone and a curved subsidence zone in the vertical direction. The six layers in the caving zone are mainly used to fill the goaf in a falling manner. The fractured zone and the rock formation in the curved subsidence zone are mainly deformed by longitudinal separation.

2 Upward mining, simulation analysis 21 model establishment The model is regarded as dimension and the plane mechanics model is established. Assume the engineering overview of the up-going mining, the numerical model established is 150-printed, the middle and lower-layer coal shovel is high, the top is the siltstone, the 4th station is the top, the middle fine sand hole is 9, the upper coal seam is 3, the mining height is 3屯, the direct top For the siltstone 3, the direct bottom is siltstone 6 and the rock layers with little difference in physical properties within the calculation model are combined to form a single-strand rock formation. Rock lithology and distribution 1. The physical and mechanical parameters of each layer of coal and rock are as follows.

The mm-shaped sandstone trrm is controlled by sandstone, and the number of personnel is reduced to 5, saving personnel costs. 4 saving air compressor lubricant 6 reduces machine loss. Reduced machine failure rate. Every year after the renovation, Ting is about 2,718 yuan.

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