Device and method for adjusting up-and-down movement of front and rear scraper conveyors of coal mining working face

Abstract

The invention discloses a device and a method for adjusting up-and-down movement of a front scraper conveyor and a rear scraper conveyor of a coal mining workface, the device for adjusting up-and-down movement of the front scraper conveyor and the rear scraper conveyor of the coal mining workface comprises the scraper conveyor, a measuring mechanism and a controller, the scraper conveyor is arranged on the coal mining workface and is adjacent to a reversed loader, and the measuring mechanism is connected with the controller. The distance between the scraper conveyor and the reversed loader is a preset value, and the measuring mechanism is arranged on the scraper conveyor and / or the reversed loader and used for measuring the distance between the scraper conveyor and the reversed loader. The controller is in communication connection with the measuring mechanism and used for receiving data of the measuring mechanism and controlling the scraper conveyor to move so as to adjust the distance between the scraper conveyor and the reversed loader to a preset value. The device for adjusting the up-and-down movement of the scraper conveyors on the front portion and the rear portion of the coal mining working face has the advantages of being rapid and accurate in adjustment and small in manual intervention.

Description

Technical Field

[0001] The invention relates to the technical field of underground equipment, and in particular to a device and method for adjusting the up and down movement of scraper conveyors at the rear and rear ends of a coal mining working face. Background Art

[0002] The ups and downs of the scraper conveyor are affected by many factors, such as the inclination of the coal seam, its own weight, the operating level of the workers, the structure of the coal seam at the working face and the coal quality. In order to ensure the normal coal flow transportation of the coal mining working face, the scraper conveyor needs to be adjusted. When moving the cutters at the upper and lower mouths of the coal mining working face, the number of cutters depends on the work experience of the coal mining machine driver, which has a large error, wastes time and effort, and the advancement rate is difficult to grasp. Summary of the invention

[0003] The present invention is based on the inventor's discovery and understanding of the following facts and problems: the existing adjustment method relies on experience factors and has large errors. The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, an embodiment of the present invention proposes a device for adjusting the up and down movement of the front and rear scraper conveyors of a coal mining working face, which has the advantages of fast and accurate adjustment and less manual intervention.

[0004] According to an embodiment of the present invention, the device for adjusting the up and down movement of the scraper conveyors at the front and rear of the coal mining face comprises a scraper conveyor, a measuring mechanism and a controller. The scraper conveyor is arranged on the coal mining face, the scraper conveyor is adjacent to a transfer machine, the distance between the scraper conveyor and the transfer machine is a preset value, the measuring mechanism is arranged on the scraper conveyor and / or the transfer machine to measure the distance between the scraper conveyor and the transfer machine, and the controller is communicatively connected to the measuring mechanism to receive data from the measuring mechanism and control the movement of the scraper conveyor to adjust the distance between the scraper conveyor and the transfer machine to the preset value.

[0005] The device for adjusting the up and down movement of the front and rear scraper conveyors of the coal mining face according to the embodiment of the present invention has the advantages of fast and accurate adjustment and less manual intervention. The present application has the following advantages: The present application has the following advantages: It has a high degree of automation, and can realize automatic measurement and automatic adjustment of the distance between the scraper conveyor and the transfer machine, without frequent manual intervention, thereby improving the level of automation. Improve production efficiency, by accurately controlling the distance between the scraper conveyor and the transfer machine, ensure the smooth transportation of the coal flow, avoid problems such as coal flow blockage or poor transportation caused by inappropriate distance, thereby improving the production efficiency of the coal mining face; It has strong adaptability, and can be adjusted and optimized according to different coal mining face conditions and equipment configurations. It has strong adaptability, can meet the use requirements under various complex working conditions, accurately control the adjustment of the coal mining face and scientifically manage the mining site.

[0006] In some embodiments, the measuring mechanism includes an ultrasonic distance measuring sensor, and a transmitter and a receiver of the ultrasonic sensor are respectively arranged on the scraper conveyor and the transfer machine.

[0007] In some embodiments, the transmitters of the ultrasonic sensor are arranged at the head and the tail of the scraper conveyor.

[0008] According to an embodiment of the present invention, the method for adjusting the up and down movement of the scraper conveyor at the front and rear of the coal mining working face comprises the following steps:

[0009] The first distance is measured when the scraper conveyor on the working surface is operating normally, and the second distance is measured when the scraper conveyor on the working surface slides up and down, to obtain the displacement distance of the scraper conveyor.

[0010] Calculate the rotation angle of the coal scraper conveyor for each cut according to the displacement distance, and obtain the total number of cutters moved by the scraper conveyor;

[0011] One end of the scraper conveyor is anchored and taken as the center of a circle, while the other end of the scraper conveyor performs a circular motion to cut coal, thereby achieving adjustment of the scraper conveyor.

[0012] In some embodiments, the measuring mechanism obtains the first distance and the second distance, and when the second distance is greater than the first distance, the first upward movement amount is calculated according to the second distance and the first distance, and the tail end of the scraper conveyor is anchored;

[0013] When the second distance is smaller than the first distance, the first sliding amount is calculated according to the second distance and the first distance, and one end of the nose of the scraper conveyor is anchored.

[0014] In some embodiments, the distance between the scraper conveyor and the transfer machine during normal operation is a, the moving distance of the scraper conveyor during slippage is b, the cutting depth of the coal mining machine is H, the length of the scraper conveyor is L, SinA = H / L,

[0015] A=arcSin(H / L), A is the rotation angle of the coal scraper conveyor for each cut.

[0016] In some embodiments, the adjustable distance of each scraper conveyor is h1, h1 = LL|CosA| = L(1-|CosA|)

[0017] b=nh1,

[0018] n=b / L(1-|CosA|), n is the total number of tool moves.

[0019] In some embodiments, a distance sensor is used to measure the distance between the scraper conveyor and the transfer machine in real time, and the distance data is sent to a controller. The controller calculates the rotation angle A and the adjustment distance h1 of the scraper conveyor for each coal cutting based on the distance data, the cutting depth of the coal mining machine and the length of the scraper conveyor, and the total number of cuts moved is calculated based on h1. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the position change of the scraper conveyor and the transfer machine of the device for adjusting the up and down movement of the scraper conveyor at the front and rear of the coal mining working face in an embodiment of the present invention.

[0021] Figure 2 2 is a schematic diagram of the change in the downward position of the scraper conveyor of the device for adjusting the up and down movement of the scraper conveyors at the front and rear of the coal mining working face in an embodiment of the present invention.

[0022] Figure 3 yes Figure 2 A partial enlarged schematic diagram of .

[0023] Figure numerals: 1. Scraper conveyor; 2. Transfer machine. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0025] According to an embodiment of the present invention, the device for adjusting the up and down movement of the scraper conveyor 1 at the front and rear of the coal mining working face comprises a scraper conveyor 1, a measuring mechanism and a controller. The scraper conveyor 1 is arranged on the coal mining working face, the scraper conveyor 1 is adjacent to the transfer machine, and the distance between the scraper conveyor 1 and the transfer machine is a preset value. The measuring mechanism is arranged on the scraper conveyor 1 and / or the transfer machine to measure the distance between the scraper conveyor 1 and the transfer machine. The controller is communicatively connected with the measuring mechanism to receive data from the measuring mechanism and control the movement of the scraper conveyor 1 to adjust the distance between the scraper conveyor 1 and the transfer machine to the preset value. The scraper conveyor 1 is transporting on the coal mining working face. The scraper conveyor 1 is adjacent to the transfer machine to ensure the transportation of coal flow. The measuring mechanism is used to measure the distance between the scraper conveyor 1 and the transfer machine. The measuring mechanism can use a non-contact measurement method to accurately measure the distance between the scraper conveyor 1 and the transfer machine in real time, and transmit the measurement data to the controller. The controller is used to receive the data and control the scraper conveyor 1 according to the data to adjust the distance between the scraper conveyor 1 and the transfer machine.

[0026] The device for adjusting the up and down movement of the front and rear scraper conveyors 1 at the coal mining working face according to the embodiment of the present invention has the advantages of fast and accurate adjustment and less manual intervention.

[0027] In some embodiments, the measuring mechanism includes an ultrasonic distance measuring sensor, and a transmitter and a receiver of the ultrasonic sensor are respectively arranged on the scraper conveyor 1 and the transfer machine.

[0028] Specifically, the ultrasonic distance sensor emits high-frequency ultrasonic pulses through the transmitter. These pulses propagate in the air. After the receiver receives the ultrasonic signal, the control circuit inside the sensor will calculate the time interval from the emission to the reception of the ultrasonic wave. The transmitter and receiver are respectively installed on the scraper conveyor 1 and the transfer machine, which can avoid the measurement error caused by the structural limitations of the sensor itself and ensure that the measured distance more accurately reflects the actual distance between the two. The installation position of the transmitter and receiver on the scraper conveyor 1 and the transfer machine needs to ensure that the ultrasonic wave can propagate and reflect without obstacles, and select a relatively flat and unobstructed surface for installation. After the installation is completed, the sensor needs to be calibrated to compensate for the impact of environmental factors on the measurement results.

[0029] In some embodiments, the transmitters of the ultrasonic sensors are arranged at the head and the tail of the scraper conveyor 1 .

[0030] Specifically, by arranging transmitters at the head and tail of the machine, the distance between the two ends of the scraper conveyor 1 and the transfer machine can be measured simultaneously. By comparing the distance data at both ends, the overall position and posture of the scraper conveyor 1 can be more accurately determined. This avoids the situation where the error of the local position will affect the overall judgment when the transmitter is arranged at only a single point.

[0031] According to the method for adjusting the up and down movement of the front and rear scraper conveyors 1 of the coal mining working face according to the embodiment of the present invention, the method for adjusting the up and down movement of the front and rear scraper conveyors 1 of the coal mining working face comprises the following steps:

[0032] The first distance is measured when the scraper conveyor 1 on the working surface is working normally, and the second distance is measured when the scraper conveyor 1 on the working surface slides up and down, to obtain the displacement distance of the scraper conveyor 1.

[0033] The rotation angle of the coal scraper conveyor 1 for each cut is calculated according to the displacement distance, and the total number of cutters moved by the scraper conveyor 1 is obtained;

[0034] One end of the scraper conveyor 1 is anchored and taken as the center of a circle, while the other end of the scraper conveyor 1 performs a circular motion to cut the coal, thereby achieving adjustment of the scraper conveyor 1 .

[0035] Real-time monitoring of the distance between the scraper conveyor 1 and the transfer machine can accurately measure the displacement and rotation angle of the scraper conveyor 1 to achieve precise adjustment, thereby improving the stability and safety of coal mining work. The automated control system can be used to receive and adjust the monitoring data in real time, thereby reducing manual intervention and labor intensity. The precise adjustment of the scraper conveyor 1 shortens the adjustment time and improves coal mining efficiency, thereby better controlling the advancement speed and direction of the coal mining face.

[0036] In some embodiments, the measuring mechanism obtains the first distance and the second distance, and when the second distance is greater than the first distance, the first upward movement amount is calculated according to the second distance and the first distance, and the tail end of the scraper conveyor 1 is anchored;

[0037] When the second distance is smaller than the first distance, the first sliding amount is calculated according to the second distance and the first distance, and one end of the nose of the scraper conveyor 1 is anchored.

[0038] Specifically, the state of the scraper conveyor 1 can be determined by comparing the first distance and the second distance, and targeted adjustments can be made according to the upward or downward movement of the scraper conveyor 1. By calculating the first upward movement amount or the first downward movement amount, the adjustment range can be quickly determined, thereby reducing the trial and error time during the adjustment process and improving the adjustment efficiency.

[0039] In some embodiments, the distance between the scraper conveyor 1 and the transfer machine during normal operation is a, the moving distance of the scraper conveyor 1 during slippage is b, the cutting depth of the coal mining machine is H, the length of the scraper conveyor 1 is L, SinA = H / L,

[0040] A=arcSin(H / L), A is the rotation angle of the coal scraper conveyor 1 for each cut.

[0041] Specifically, an inclination sensor and an acceleration sensor can be added to the scraper conveyor 1 to obtain more comprehensive status information of the scraper conveyor 1, further improve data accuracy and control effect of the scraper conveyor 1, and the rotation angle of the scraper conveyor 1 can be obtained by collecting the distance between the scraper conveyor 1 and the transfer machine and the moving distance of the scraper conveyor 1.

[0042] In some embodiments, the adjustable distance of the scraper conveyor 1 for each cut is h1, where h1=LL|CosA|=L(1-|CosA|)

[0043] b=nh1,

[0044] n=b / L(1-|CosA|), n is the total number of tool moves.

[0045] Specifically, the rotation angle of the scraper conveyor 1 is calculated through a formula to obtain a single adjustable distance, and the calculated total number of moving knives can intuitively display the adjustment times and adjustment positions of the scraper conveyor 1, which is convenient for automatic control and precise adjustment.

[0046] In some embodiments, a distance sensor is used to measure the distance between the scraper conveyor 1 and the transfer machine in real time, and the distance data is sent to the controller. The controller calculates the rotation angle A and the adjustment distance h1 of the scraper conveyor 1 for each coal cutting based on the distance data, the cutting depth of the coal mining machine and the length of the scraper conveyor 1, and the total number of cuts moved is calculated based on h1.

[0047] Specifically, the calculated total number of blade moves can determine the number of times the scraper conveyor 1 is adjusted, and the controller realizes automatic control, reduces manual intervention, improves adjustment efficiency, and reduces equipment maintenance costs. Safety devices can also be added to protect the scraper conveyor 1, and the installation device controls the scraper conveyor 1 to stop suddenly to avoid equipment damage.

[0048] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A device for adjusting the up and down movement of the scraper conveyor at the front and rear of the coal mining working face, characterized in that: include: A scraper conveyor, wherein the scraper conveyor is arranged on the coal mining working face, the scraper conveyor is adjacent to a transfer machine, and the distance between the scraper conveyor and the transfer machine is a preset value; a measuring mechanism, the measuring mechanism being arranged on the scraper conveyor and / or the transfer machine and being used to measure the distance between the scraper conveyor and the transfer machine; A controller is connected in communication with the measuring mechanism to receive data from the measuring mechanism and control the movement of the scraper conveyor to adjust the distance between the scraper conveyor and the transfer machine to a preset value.

2. The device for adjusting the up and down movement of the front and rear scraper conveyors of the coal mining working face according to claim 1 is characterized in that: The measuring mechanism comprises an ultrasonic distance measuring sensor, and a transmitter and a receiver of the ultrasonic sensor are respectively arranged on the scraper conveyor and the transfer machine.

3. The device for adjusting the up and down movement of the front and rear scraper conveyors of the coal mining working face according to claim 2 is characterized in that: The transmitters of the ultrasonic sensor are arranged at the head and the tail of the scraper conveyor.

4. A method for adjusting the up and down movement of the front and rear scraper conveyors of the coal mining working face, characterized in that: The following steps are involved: The first distance is measured when the scraper conveyor on the working surface is operating normally, and the second distance is measured when the scraper conveyor on the working surface slides up and down, to obtain the displacement distance of the scraper conveyor. Calculate the rotation angle of the coal scraper conveyor for each cut according to the displacement distance, and obtain the total number of cutters moved by the scraper conveyor; One end of the scraper conveyor is anchored and taken as the center of a circle, while the other end of the scraper conveyor performs a circular motion to cut coal, thereby achieving adjustment of the scraper conveyor.

5. The method for adjusting the up and down movement of the front and rear scraper conveyors of the coal mining working face according to claim 4 is characterized in that: The measuring mechanism obtains the first distance and the second distance, and when the second distance is greater than the first distance, calculates the first upward movement amount according to the second distance and the first distance, and anchors the tail end of the scraper conveyor; When the second distance is smaller than the first distance, the first sliding amount is calculated according to the second distance and the first distance, and one end of the nose of the scraper conveyor is anchored.

6. The method for adjusting the up and down movement of the front and rear scraper conveyors of the coal mining working face according to claim 4 is characterized in that: When the scraper conveyor is working normally, the distance between the scraper conveyor and the transfer machine is a. When the scraper conveyor is sliding, the moving distance is b. The cutting depth of the coal mining machine is H. The length of the scraper conveyor is L. SinA = H / L. A=arcSin(H / L), A is the rotation angle of the coal scraper conveyor for each cut.

7. The method for adjusting the up and down movement of the front and rear scraper conveyors of the coal mining working face according to claim 5 is characterized in that: The adjustable distance of the scraper conveyor for each cut is h1, h1=LL|CosA|=L(1-|CosA|) b=nh1, n=b / L(1-|CosA|), n is the total number of tool moves.

8. The method for adjusting the up and down movement of the front and rear scraper conveyors of the coal mining working face according to claim 6 is characterized in that: A distance sensor is used to measure the distance between the scraper conveyor and the transfer machine in real time, and the distance data is sent to the controller. The controller calculates the rotation angle A and adjustment distance h1 of the scraper conveyor for each coal cutting based on the distance data, the cutting depth of the coal mining machine and the length of the scraper conveyor, and the total number of cutters moved is calculated based on h1.

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