An intelligent pneumatic air window precise adjustment device and method underground in a mine

Abstract

The present invention belongs to the technical field of ventilation regulation in underground mines, and particularly relates to an intelligent pneumatic air window precise regulation device and method for underground mines. The regulation device includes a pneumatic air window, a controller, and an air volume sensor. The pneumatic air window is installed at the ventilation opening of the underground roadway wall in the mine and is driven by a pneumatic motor. Two air ports of the pneumatic motor are respectively externally connected to compressed air through an air pipe one and an air pipe two. The air volume sensor is installed in the underground roadway in the mine and faces the pneumatic air window. Compared with the prior art, (1) the use of the present invention can avoid repeated regulation of the pneumatic air window in underground mines; (2) the regulation method of the pneumatic air window in underground mines of the present invention adopts the method of gradually reducing the single regulation amount in proportion, making the regulation efficiency higher; (3) the intelligent pneumatic air window precise regulation device and method for underground mines of the present invention have strong applicability and can meet the regulation requirements of pneumatic air windows with different structures and different properties.

Description

Technical Field

[0001] The invention belongs to the technical field of pneumatic air window adjustment control methods for return air laneways in mines, and particularly relates to an intelligent pneumatic air window precise adjustment device and method for mines. Background Technique

[0002] Since the return air laneway in the mine contains gas, which is flammable and explosive, only intrinsically safe electrical products can be selected. Flameproof motors, servo motors, and stepper motors cannot be used to drive the air windows in the mine. Currently, all motor products on the market cannot meet the usage requirements of the underground return air laneway. Therefore, pneumatic drive of the air windows in the mine is a commonly used, economical, and reasonable drive method. The driving air source uses underground compressed air, and the air pressure is not always constant and has strong compressibility. The rotational speed of the pneumatic motor cannot be directly adjusted, so a linear adjustment method (such as PID adjustment) cannot be used to adjust the ventilation volume of the air window. For air windows with different structures, the corresponding relationship between the adjustment time and the ventilation volume after adjustment is also different. Summary of the Invention

[0003] The invention provides an intelligent pneumatic air window precise adjustment device and method for mines in view of the above problems.

[0004] To achieve the above object, the technical solution adopted by the invention is as follows: An intelligent pneumatic air window precise adjustment device for mines includes a pneumatic air window, a controller, and a air volume sensor; the pneumatic air window is installed at the ventilation opening of the roadway wall in the mine and is driven by a pneumatic motor; the two air ports of the pneumatic motor are respectively externally connected to compressed air through a first air pipe and a second air pipe, a first air control valve is installed on the first air pipe close to the pneumatic motor side, and a second air control valve is installed on the second air pipe close to the pneumatic motor side; the air volume sensor is installed in the mine roadway and faces the pneumatic air window; the input end of the controller is communicatively connected to the output end of the air volume sensor; the output end of the controller is communicatively connected to the first air control valve and the second air control valve.

[0005] Preferably, the controller is a programmable PLC controller.

[0006] Preferably, it further includes a host computer; the host computer is located in the monitoring center on the ground; the controller is installed in the roadway in the mine and is communicatively connected to the host computer.

[0007] An intelligent pneumatic air window precise adjustment method for mines includes the following steps:

[0008] Step 1: Install the intelligent pneumatic air window precise adjustment device for mines; set the time a for the pneumatic air window to open from fully closed to fully open and the interval time b between two adjacent adjustments in the controller; then the controller calculates the basic time A for air window adjustment, and the basic time A is equal to 0.5a; the operator issues a set air volume Qs to the controller;

[0009] In Step 2, the controller collects the air volume output value of the air volume sensor to obtain the current air volume Qc, and then calculates the error coefficient When the error coefficient c is not greater than the preset value d, the controller does not start to adjust the pneumatic air window; when the error coefficient c is greater than the preset value d, the controller starts to adjust the pneumatic air window;

[0010] After the controller in Step 3 starts to adjust the pneumatic air window, the controller first calculates the running time t of this air window adjustment. The running time t of this air window adjustment is equal to the product of the error coefficient c and the basic time A of the air window adjustment. Then, according to the positive or negative value of Qc - Qs, the controller controls the pneumatic motor to run for t time;

[0011] After the pneumatic motor runs for t time in Step 4, the controller controls the pneumatic motor to stop running and lasts for an interval time b. Then, repeat Step 2 and Step 3 until the error coefficient c is not greater than the preset value d, and the adjustment of the pneumatic air window ends.

[0012] Preferably, the basis for setting the time a in Step 1 is the test data of the pneumatic air window switch.

[0013] Preferably, the interval time b in Step 1 is selected between 3 s and 6 s.

[0014] Preferably, the operator issues the set air volume Qs to the controller by means of remote control or local control in Step 1.

[0015] Preferably, the preset value d in Step 2 is selected between 1% and 5%.

[0016] Preferably, when Qc - Qs is positive, the controller controls the pneumatic motor to run for t time to reduce the opening degree of the pneumatic air window; when Qc - Qs is negative, the controller controls the pneumatic motor to run for t time to increase the opening degree of the pneumatic air window.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0018] (1) Using the present invention can avoid repeated adjustment of the pneumatic air window in the mine. In the prior art, due to the fact that the air volume detected by the air volume sensor lags behind the real-time air volume generated by the adjustment of the pneumatic air window, there are situations of repeated adjustment of the pneumatic air window and difficulty in adjusting it to the set air volume;

[0019] (2) In the adjustment method of the pneumatic air window underground in the present invention, the interval time between two adjacent adjustments is set, making the air volume data detected by the air volume sensor more accurate, and the air volume adjusted based on this air volume data more accurate; at the same time, the interval time between two adjacent adjustments allows a certain recovery time for each start and stop of the pneumatic motor, preventing damage due to frequent start and stop;

[0020] (3) The adjustment method of the pneumatic air window underground in the present invention adopts the method of gradually reducing the single - adjustment amount in proportion, making the adjustment efficiency higher;

[0021] (4) The intelligent pneumatic air window precise adjustment device and method underground in the present invention have strong applicability and can meet the adjustment requirements of pneumatic air windows with different structures and different properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments:

[0023] Figure 1 Schematic diagram of the intelligent pneumatic air window precise adjustment device underground;

[0024] Figure 2 Schematic diagram of the adjustment process using the intelligent pneumatic air window precise adjustment device underground in Embodiment 1;

[0025] Figure 3 Schematic diagram of the adjustment process using the intelligent pneumatic air window precise adjustment device underground in Embodiment 2.

[0026] Description of the reference numerals:

[0027] 1 - Pneumatic air window, 2 - Controller, 3 - Air volume sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to be able to more clearly understand the above - mentioned objects, features and advantages of the present invention, the following further describes the present invention with reference to the drawings and embodiments.

[0029] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0030] Embodiment 1

[0031] The following further describes the present invention with reference to the attached Figure 1 - Figure 2 A kind of intelligent pneumatic air window precise adjustment device underground, as Figure 1 shown, includes a pneumatic air window 1, a controller 2 and an air volume sensor 3.

[0032] As shown Figure 1 The pneumatic windshield 1 shown is installed at the ventilation opening of the roadway wall in the mine and is driven by a pneumatic motor; the two air ports of the pneumatic motor are respectively externally connected to compressed air through the first air pipe and the second air pipe. A first air control valve is installed on the side of the first air pipe close to the pneumatic motor, and a second air control valve is installed on the side of the second air pipe close to the pneumatic motor. Using the first air control valve and the second air control valve to realize the forward and reverse rotation of the pneumatic motor is the prior art.

[0033] As shown Figure 1 The air volume sensor 3 shown is installed in the roadway in the mine and is directly opposite to the pneumatic windshield 1.

[0034] The input end of the controller 2 is communicatively connected to the output end of the air volume sensor 3; the output end of the controller 2 is communicatively connected to the first air control valve and the second air control valve.

[0035] The controller 2 is a programmable PLC controller.

[0036] It also includes a host computer; the host computer is in the monitoring center on the ground; the controller 2 is installed in the roadway in the mine and is communicatively connected to the host computer.

[0037] An intelligent pneumatic windshield precise adjustment method in the mine includes the following steps:

[0038] Step 1: Install the intelligent pneumatic windshield precise adjustment device in the mine as described above; set the time a for the pneumatic windshield 1 to fully open from fully closed and the interval time b between two adjacent adjustments in the controller 2; then the controller 2 calculates the basic time A for the windshield adjustment, and the basic time A is equal to 0.5a; the operator issues the set air volume Qs to the controller 2;

[0039] Step 2: The controller 2 collects the air volume output value of the air volume sensor 3 to obtain the current air volume Qc, and then calculates the error coefficient When the error coefficient c is not greater than the preset value d, the controller 2 does not start to adjust the pneumatic windshield 1; when the error coefficient c is greater than the preset value d, the controller 2 starts to adjust the pneumatic windshield 1;

[0040] Step 3: After the controller 2 starts to adjust the pneumatic windshield 1, the controller 2 first calculates the running time t of this windshield adjustment. The running time t of this windshield adjustment is equal to the product of the error coefficient c and the basic time A for the windshield adjustment; then according to the positive or negative value of Qc - Qs, the controller 2 controls the pneumatic motor to run for t time;

[0041] Step 4: After the pneumatic motor runs for t time, the controller 2 controls the pneumatic motor to stop running and lasts for the interval time b; then repeat Step 2 and Step 3 until the error coefficient c is not greater than the preset value d, and the adjustment of the pneumatic windshield 1 ends.

[0042] In Step 1, the setting of time a is based on the test data of the pneumatic windshield 1 switch.

[0043] In Step 1, the interval time b is selected between 3 s and 6 s.

[0044] In Step 1, the operator issues the set air volume Qs to the controller 2 through remote control or local control.

[0045] In Step 2, the preset value d is selected between 1% and 5%.

[0046] In Step 3, when Qc - Qs is positive, the controller 2 controls the pneumatic motor to run for t time to reduce the opening degree of the pneumatic windshield 1; when Qc - Qs is negative, the controller 2 controls the pneumatic motor to run for t time to increase the opening degree of the pneumatic windshield 1.

[0047] In this embodiment, the pressure of the compressed air is high, and the adjustment of the pneumatic windshield 1 is relatively sensitive. During the adjustment of the pneumatic windshield 1 in the mine:

[0048] The set air volume Qs issued by the operator to the controller 2 = 100 Nm 3 / min, the interval time b = 5 s, the time a for the windshield to open from fully closed to fully open = 10 s (the reduction ratio of the transmission mechanism of the pneumatic windshield 1 is small), and the preset value d of the error coefficient = 5%.

[0049] As Figure 2 shown, during the first adjustment, Qc = 150 Nm 3 / min. At this time the error coefficient c > the preset value d, adjustment is required, and the adjustment time The controller 2 controls the pneumatic motor to run for 2.5 s to reduce the opening degree of the pneumatic windshield 1.

[0050] During the second adjustment, Qc = 60 Nm 3 / min. At this time, the error coefficient c > d, adjustment is required, and the adjustment time The controller 2 controls the pneumatic motor to run for 2 s to increase the opening degree of the pneumatic windshield 1.

[0051] During the third adjustment, Qc = 130 Nm 3 / min. At this time, the error coefficient c > d, adjustment is required, and the adjustment time The controller 2 controls the pneumatic motor to run for 1.5 s to reduce the opening degree of the pneumatic windshield 1.

[0052] During the fourth adjustment, Qc = 80 Nm 3 / min. At this time, the error coefficient c > d, adjustment is required, and the adjustment time The controller 2 controls the pneumatic motor to run for 1 s to increase the opening degree of the pneumatic wind window 1.

[0053] At the fifth adjustment, Qc = 110 Nm 3 / min, and at this time the error coefficient c > d, adjustment is required, then the adjustment time The controller 2 controls the pneumatic motor to run for 0.5 s to decrease the opening degree of the pneumatic wind window 1.

[0054] At the sixth adjustment, Qc = 96 Nm 3 / min, and at this time the error coefficient c < d, adjustment is not required, and the adjustment is completed.

[0055] Embodiment 2

[0056] The difference between this embodiment and Embodiment 1 is that in this embodiment, the pressure of the compressed air is small, and the adjustment of the pneumatic wind window 1 is relatively slow. During the adjustment of the pneumatic wind window 1 in the mine:

[0057] The operator issues a set air volume Qs = 100 Nm to the controller 2 3 / min, the interval time b = 5 s, the time a for the wind window to open from fully closed to fully open = 100 s (the reduction ratio of the transmission mechanism of the pneumatic wind window 1 is large), and the preset value d of the error coefficient = 5%.

[0058] As Figure 3 shown, at the first adjustment, Qc = 150 Nm 3 / min, and at this time c > d, adjustment is required, then the adjustment time The controller 2 controls the pneumatic motor to run for 25 s to decrease the opening degree of the pneumatic wind window 1.

[0059] At the second adjustment, Qc = 60 Nm 3 / min, and at this time , c > d, adjustment is required, then the adjustment time The controller 2 controls the pneumatic motor to run for 20 s to decrease the opening degree of the pneumatic wind window 1.

[0060] At the third adjustment, Qc = 130 Nm 3 / min, and at this time c > d, adjustment is required, then the adjustment time The controller 2 controls the pneumatic motor to run for 15 s to decrease the opening degree of the pneumatic wind window 1.

[0061] At the fourth adjustment, Qc = 120 Nm 3 / min, and at this time c > d, adjustment is required, then the adjustment time The controller 2 controls the pneumatic motor to run for 10 s to reduce the opening degree of the pneumatic window 1.

[0062] At the fifth adjustment, Qc = 110 Nm 3 / min, at this time c > d, adjustment is required, then the adjustment time The controller 2 controls the pneumatic motor to run for 5 s to reduce the opening degree of the pneumatic window 1.

[0063] At the sixth adjustment, Qc = 104 Nm 3 / min, at this time c < d, no adjustment is required, and the adjustment is completed.

[0064] The above is only the preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. An intelligent pneumatic air window precise adjustment method in a mine, characterized in that, it includes the following steps: Step 1: Install an intelligent pneumatic air window precise adjustment device in the mine; the intelligent pneumatic air window precise adjustment device in the mine includes a pneumatic air window (1), a controller (2), and an air volume sensor (3); The pneumatic air window (1) is installed at the ventilation opening of the roadway wall in the mine and is driven by a pneumatic motor; the two air ports of the pneumatic motor are respectively externally connected to compressed air through an air pipe 1 and an air pipe 2, and a control air valve 1 is installed on the side of the air pipe 1 close to the pneumatic motor, and a control air valve 2 is installed on the side of the air pipe 2 close to the pneumatic motor; The air volume sensor (3) is installed in the mine roadway and faces the pneumatic air window (1); The input end of the controller (2) is communicatively connected to the output end of the air volume sensor (3); the output end of the controller (2) is communicatively connected to the control air valve 1 and the control air valve 2; Set the time a for the pneumatic air window (1) to open from fully closed to fully open and the interval time b between two adjacent adjustments in the controller (2); furthermore, the controller (2) calculates the basic time A for air window adjustment, and the basic time A is equal to 0.5a; the operator issues the set air volume Qs to the controller (2); Step 2: The controller (2) collects the air volume output value of the air volume sensor (3) to obtain the current air volume Qc, and then calculates the error coefficient. When the error coefficient c is not greater than the preset value d, the controller (2) does not start to adjust the pneumatic air window (1); when the error coefficient c is greater than the preset value d, the controller (2) starts to adjust the pneumatic air window (1); Step 3: After the controller (2) starts to adjust the pneumatic air window (1), the controller (2) first calculates the running time t of this air window adjustment, and the running time t of this air window adjustment is equal to the product of the error coefficient c and the basic time A for air window adjustment; then according to the positive or negative value of Qc - Qs, the controller (2) controls the pneumatic motor to run for t time; Step 4: After the pneumatic motor runs for t time, the controller (2) controls the pneumatic motor to stop running and lasts for the interval time b; then repeat Step 2 and Step 3 until the error coefficient c is not greater than the preset value d, and the adjustment of the pneumatic air window (1) ends.

2. The intelligent pneumatic air window precise adjustment method in a mine according to claim 1, characterized in that, the basis for setting the time a in Step 1 is the switch test data of the pneumatic air window (1).

3. The intelligent pneumatic air window precise adjustment method in a mine according to claim 1, characterized in that, the interval time b in Step 1 is selected between 3s and 6s.

4. The intelligent pneumatic air window precise adjustment method in a mine according to claim 1, characterized in that, in Step 1, the operator issues the set air volume Qs to the controller (2) by means of remote control or short-range control.

5. The intelligent pneumatic air window precise adjustment method in a mine according to claim 1, characterized in that, the preset value d in Step 2 is selected between 1% and 5%.

6. The intelligent pneumatic air window precise adjustment method in a mine according to claim 1, characterized in that, In step three, when Qc - Qs is positive, the controller (2) controls the pneumatic motor to operate for t time to reduce the opening degree of the pneumatic air window (1); when Qc - Qs is negative, the controller (2) controls the pneumatic motor to operate for t time to increase the opening degree of the pneumatic air window (1).

7. The precise adjustment method for an intelligent pneumatic air window underground in a mine according to claim 1, characterized in that, the controller (2) is a programmable PLC controller.

8. The precise adjustment method for an intelligent pneumatic air window underground in a mine according to claim 1, characterized in that, it further includes a host computer; the host computer is located in a monitoring center on the ground; the controller (2) is installed in a roadway underground in the mine and is communicatively connected to the host computer.

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