CN202001015U - Coal mining height monitoring system of coal mining machine - Google Patents

Abstract

The utility model discloses a coal mining height monitoring system of a coal mining machine, which comprises a controller, the input terminal of which is connected with two displacement sensors respectively installed in the oil cylinders of the left and right rocking arms of the coal mining machine, and the controller receives two The signal output by each displacement sensor is analyzed and processed to obtain the height of the left and right rocker arms of the shearer and output to the display unit connected to the output end of the controller for display. The display unit is installed on the left end of the shearer and has a The display unit 1 for displaying the height of the left rocker arm of the shearer, the display unit 2 installed at the right end of the shearer and displaying the height of the right rocker arm of the shearer, and the display unit 2 installed in the middle of the shearer for the left and right rocker arms of the shearer The display unit 3 that simultaneously displays the altitude and the altitude exceeding the threshold warning information. The utility model is simple in structure, reasonable in design, complete in function, convenient in use and operation, good in real-time measurement, good in repeatability and stability, high in measurement accuracy, good in use effect, and convenient for popularization and use.

Description

Shearer Coal Height Monitoring System

technical field

The utility model belongs to the technical field of application of coal shearers, in particular to a coal mining height monitoring system of a coal shearer.

Background technique

Coal mining machine is a very critical equipment in coal mine production. However, its working environment is very harsh. The comprehensive mechanization of coal mining and the automatic control of its working process have become an important means of increasing coal production, improving labor efficiency, reducing major vicious accidents and improving working conditions. , and the coal mining height monitoring of the coal mining machine and the automatic height adjustment control technology of the coal mining machine drum are one of the key technologies to realize the automatic control of the coal mining face. At present, the existing coal mining height monitoring system of the shearer is to measure the angle of the working face and the swing angle of the rocker arm by installing an angle sensor on the body of the shearer and the rocker arm, and calculate the swing angle through the angle difference between the two. The height of the arm. Due to the accumulation of inherent errors such as installation position and machining accuracy, the accuracy of the measured values obtained by this measurement method cannot meet the requirements of intelligent control of coal mining machines.

Utility model content

The technical problem to be solved by the utility model is to provide a shearer coal mining height monitoring system for the deficiencies in the above-mentioned prior art, which has a simple structure, a reasonable design, complete functions, convenient use and operation, and good real-time measurement. The repeatability and stability are good, and the measurement accuracy is high, which solves the defects and deficiencies in the prior art that the measurement accuracy cannot meet the intelligent control requirements of the coal mining machine, has good use effect, and is convenient for popularization and use.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: a coal mining height monitoring system for a shearer, which is characterized in that it includes a controller, and the input terminals of the controller are respectively installed on the shearer The displacement sensors in the oil cylinders of the left and right rocker arms respectively detect the expansion and contraction of the oil cylinders of the left and right rocker arms of the coal mining machine in real time. The controller receives the signals output by the two displacement sensors, analyzes and processes them to obtain the The height of the left and right rocker arms of the coal machine is output to the display unit connected to the output end of the controller for display. The display unit includes a display unit installed at the left end of the shearer and displaying the height of the left rocker arm of the shearer. The display unit 2 is installed at the right end of the shearer and displays the height of the right rocker arm of the shearer, and is installed in the middle of the shearer and simultaneously displays the height of the left and right rocker arms of the shearer and the height exceeding threshold alarm information Display unit three.

The coal mining height monitoring system of the coal mining machine is characterized in that: the displacement sensor is a magnetostrictive absolute value type linear displacement sensor.

The above-mentioned coal mining height monitoring system for a shearer is characterized in that: the controller is an industrial computer integrated with an A/D converter inside.

The above-mentioned coal cutting height monitoring system of a coal shearer is characterized in that: the display unit 1 and the display unit 2 are both LED display screens.

The above-mentioned coal mining height monitoring system for a shearer is characterized in that: the display unit 3 is a Chinese display screen.

Compared with the prior art, the utility model has the following advantages:

1. The structure of the utility model is simple and the design is reasonable. Through the displacement sensors installed in the oil cylinders of the left and right rocker arms of the shearer, the measurement of the expansion and contraction of the oil cylinders of the left and right rocker arms of the shearer is realized, and through The controller calculates the height of the rocker arm, and then knows the mining height and undercover amount of the shearer. At the same time, it can also display the height information of the rocker arm and the height exceeding threshold alarm information on the display screen, with complete functions.

2. The displacement sensor used in the utility model is easy to install and arrange, and the realization cost is low. Through the design of three display units installed at different positions of the shearer, the monitoring results can be displayed in real time and intuitively provided for the staff to view , easy to use and operate, good use effect.

3. The controller of the utility model can calculate the change of the range of the displacement sensor in real time through the change of the monitored digital value, thereby converting the actual height of the rocker arm of the shearer to be raised or lowered, and the real-time performance of the measurement is good, and , The displacement sensor used is non-contact measurement, which avoids the problem of mechanical wear and ensures the best repeatability and stability.

4. The utility model uses a displacement sensor to measure the height of the rocker arm of the shearer, which avoids the accumulation of inherent errors caused by the angle sensor in the prior art due to the installation position and machining accuracy, and the accuracy of the measured value obtained is It cannot meet the requirements of the intelligent control of the coal mining machine, and the measurement accuracy is high.

In summary, the utility model has the advantages of simple structure, reasonable design, complete functions, convenient operation, good real-time measurement, good repeatability and stability, and high measurement accuracy, which solves the problem of measurement accuracy existing in the prior art. The defects and deficiencies that cannot meet the intelligent control requirements of the coal mining machine are good in use and easy to be popularized and used.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Fig. 1 is a structural block diagram of the utility model.

Explanation of reference signs:

1-left displacement sensor; 2-right displacement sensor; 3-controller;

4-display unit; 4-1-display unit one; 4-2-display unit two;

4-3-Display unit three.

Detailed ways

As shown in Figure 1, the utility model includes a controller 3, the input terminals of the controller 3 are respectively installed in the oil cylinders of the left and right rocker arms of the shearer and are respectively connected to the left and right rocker arms of the shearer. The displacement sensor for real-time detection of the expansion and contraction of the oil cylinder. The controller 3 receives the signals output by the two displacement sensors, analyzes and processes them to obtain the height of the left and right rocker arms of the shearer and outputs them to the output of the controller 3 The display unit 4 at the end of the shearer is displayed, and the display unit 4 includes a display unit 4-1 installed at the left end of the shearer and displaying the height of the left rocker arm of the shearer, and a display unit 4-1 installed at the right end of the shearer and at the right end of the shearer. The display unit 2 4-2 for displaying the height of the rocker arm and the display unit 3 4-3 which is installed in the middle of the shearer and simultaneously displays the height of the left and right rocker arms of the shearer and the height exceeding threshold alarm information.

In this embodiment, the displacement sensor is a magnetostrictive absolute value linear displacement sensor. The magnetostrictive absolute value linear displacement sensor is composed of a waveguide, a movable magnetic ring and electronic components. The movable magnetic ring and the waveguide The tube generates a longitudinal magnetic field, and whenever a current pulse (the "interrogation signal") is sent from the sensor electronics and passes through the waveguide, a second magnetic field is generated from the radial side of the waveguide. At the moment when the waveguides intersect, a strain pulse will be generated. This pulse called "return signal" will return to the electronic terminal of the sensor from the point of generation (that is, the position measurement point) and be detected by the detector. The high-speed timer will send out the interrogation signal to The time period of return signal arrival is measured, and the exact position of the magnetic ring can be calculated quickly and accurately. The magnetic ring position measured by calculating the running time of the pulse is an absolute value position reading, and there is no need to consider periodic remarking or worry about zeroing after power failure. This non-contact measurement avoids problems of mechanical wear and ensures optimum repeatability and stability. The two displacement sensors are specifically a left displacement sensor 1 and a right displacement sensor 2 . The controller 3 is an industrial computer integrated with an A/D converter inside. Both the first display unit 4-1 and the second display unit 4-2 are LED display screens. The display unit three 4-3 is a Chinese display screen.

Specifically, when the displacement sensor is installed in the oil cylinder of the rocker arm of the coal mining machine, the displacement sensor and the piston rod are fixed on the base of the oil cylinder in parallel, and the magnetic ring is connected with the piston in the oil cylinder, and the magnetic ring of the displacement sensor moves together with the piston of the oil cylinder during operation , the displacement sensed by the magnetic ring moving up and down is the displacement of the piston, that is, the displacement of the cylinder moving up and down. The coal mining high-speed monitoring system of the shearer measures the expansion and contraction of the rocker cylinder through the displacement sensor, and transmits the signal to the controller 3. The controller 3 calculates the height of the rocker arm according to the stroke of the oil cylinder, so as to know the mining height and undercover amount of the shearer. , and display this information on the display unit three 4-3 in the middle of the shearer and the display unit one 4-1 and display unit two 4-2 at the left and right ends, when the shearer is mining high or exceeds the safety zone, the control The device 3 will adjust the rocker arm height of the coal shearer in time, and the display unit 3 4-3 will display the height exceeding threshold warning information.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (5)

1. the coal-winning machine height monitoring system of mining, it is characterized in that: comprise controller (3), the displacement transducer that two of the input terminations of described controller (3) are installed in the oil cylinder of two rocking arms about coal-winning machine respectively and respectively the oil cylinder stroke of two rocking arms about coal-winning machine are detected in real time, described controller (3) receives two signals that displacement transducer is exported, carry out analyzing and processing and draw the height of two rocking arms about coal-winning machine and export to the display unit (4) that is connected on controller (3) output and show, described display unit (4) comprises the display unit one (4-1) that is installed in the coal-winning machine left end and coal-winning machine left side rocking arm height is shown, the display unit two (4-2) that is installed in the coal-winning machine right-hand member and the right rocking arm height of coal-winning machine is shown and be installed in the coal-winning machine middle part and to the height of two rocking arms about coal-winning machine and the display unit three (4-3) that shows simultaneously of superthreshold warning information highly.

2. according to the described coal-winning machine coal mining of claim 1 height monitoring system, it is characterized in that: described displacement transducer is a magnetostriction absolute value type linear displacement transducer.

3. according to the described coal-winning machine coal mining of claim 1 height monitoring system, it is characterized in that: described controller (3) is the inner Industrial Personal Computer (IPC) that is integrated with A/D converter.

4. according to the described coal-winning machine coal mining of claim 1 height monitoring system, it is characterized in that: described display unit one (4-1) and display unit two (4-2) are LED display.

5. according to the described coal-winning machine coal mining of claim 1 height monitoring system, it is characterized in that: described display unit three (4-3) is Chinese display screen.

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