CN112360540B - Pneumatic control system for controlling mining disaster area wind windows - Google Patents
Pneumatic control system for controlling mining disaster area wind windows Download PDFInfo
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- 238000005065 mining Methods 0.000 title claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 12
- 230000001276 controlling effect Effects 0.000 claims description 34
- 230000003111 delayed effect Effects 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000006837 decompression Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 7
- 238000004880 explosion Methods 0.000 abstract description 6
- 230000009471 action Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Abstract
The invention relates to a pneumatic control system for controlling a wind window of a mining disaster area, which belongs to the technical field of coal mine machinery and comprises a pneumatic control loop communicated with a gas source; an actuator in communication with the pneumatic control circuit; the output end of the actuating mechanism is connected with the air window; the pneumatic control loop comprises a main driving sub-loop for providing a driving air source for the executing mechanism and a control sub-loop for controlling the position of an output valve of the main driving sub-loop; the main driving sub-loop comprises a three-position five-way middle-seal type double-pneumatic control reversing valve arranged between the control executing mechanism and the air source; the control sub-loop comprises a first control sub-loop used for controlling the three-position five-way middle-sealing type double-pneumatic control reversing valve to be connected with the left position and reset and a second control sub-loop used for controlling the three-position five-way middle-sealing type double-pneumatic control reversing valve to be connected with the right position and reset after passing through the control sub-loop control valve. The invention solves the problem of casualties caused by explosion when personnel operate the airtight air window at a close distance or unseal.
Description
Technical Field
The invention belongs to the technical field of coal mine machinery, and relates to a pneumatic control system for controlling a mining disaster area wind window.
Background
Coal mine fires are one of the major disasters that directly threaten coal mine safety and worker life. When the fire disaster is impossible to put out by a direct fire extinguishing method, or due to the occurrence of combustible gas or other conditions, the rapid and effective establishment of a closed partition wall for isolating an easy spontaneous combustion area, a harmful gas source or a gas gathering area is a main way and an effective means for shortening the duration of the fire disaster, reducing accident loss and avoiding secondary disasters. When the fire area is constructed or unsealed to be sealed, particularly when the wind window is closed and unsealed, the gas composition in the fire area can be greatly changed, and the explosion is easy to occur due to the fact that the gas is accumulated in the explosion concentration range, so that operators are injured.
The mode of combining the wind window with the brick-concrete structure is a method for quickly constructing the fire area airtight. The wind window is driven by electric or pneumatic means. The main problems of these two driving modes are: the use safety is poor under the disaster environment by adopting an electric mode; the pneumatic close-range control is adopted to control the danger of operators, the remote control is adopted to control the wiring of the air pipe to be difficult and the operators are easy to damage.
Disclosure of Invention
In view of the above, the present application aims to provide a pneumatic control system for controlling a wind window in a mining disaster area, so as to remotely control the opening and closing of the wind window.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A pneumatic control system for controlling a mining disaster area wind window comprises a pneumatic control loop communicated with a gas source; an actuator in communication with the pneumatic control circuit; the output end of the actuating mechanism is connected with the air window; the pneumatic control loop comprises a main driving sub-loop for providing a driving air source for the executing mechanism and a control sub-loop for controlling the position of an output valve of the main driving sub-loop; the main driving sub-loop comprises a three-position five-way middle-seal type double-pneumatic control reversing valve arranged between the control executing mechanism and the air source; the control sub-loop comprises a first control sub-loop used for controlling the three-position five-way middle-sealing type double-pneumatic control reversing valve to be connected with the left position and reset and a second control sub-loop used for controlling the three-position five-way middle-sealing type double-pneumatic control reversing valve to be connected with the right position and reset after passing through the control sub-loop control valve.
Optionally, the sub-loop control valve is a manual two-position five-way reversing valve.
Optionally, the first control sub-loop is connected with the left position of the three-position five-way middle-sealing type double-pneumatic control reversing valve at fixed time and is delayed to reset, and the first control sub-loop comprises the left position of the sub-loop control valve, a first pneumatic delay starting switch consisting of a first pneumatic delay valve and the first pneumatic delay reversing valve, a first pneumatic delay reset switch consisting of a second pneumatic delay valve and the second pneumatic delay valve, the left position of the three-position five-way middle-sealing type double-pneumatic control reversing valve and a left cavity air inlet of the executing mechanism.
Optionally, the left output port of the sub-loop control valve is connected with the air inlet of the first pneumatic delay valve and the air inlet of the first pneumatic reversing valve, the output port of the first pneumatic reversing valve is connected with the control port of the first pneumatic delay valve, and the output port of the first pneumatic delay valve is connected with the control port of the first pneumatic reversing valve, the air inlet of the second pneumatic delay valve, the control port and the air inlet of the second pneumatic reversing valve; the output port of the second pneumatic delay valve is connected with the left control port of the second pneumatic reversing valve, the output port of the second pneumatic reversing valve is connected with the left position of the three-position five-way middle-seal type double pneumatic reversing valve, and the left output port of the three-position five-way middle-seal type double pneumatic reversing valve is connected with the left cavity air inlet of the executing mechanism.
Optionally, the second control sub-loop is connected with the right position of the three-position five-way middle-sealing type double-pneumatic control reversing valve at fixed time and is delayed to reset, and the second control sub-loop comprises the right position of the sub-loop control valve, a second pneumatic delay starting switch formed by a fourth pneumatic delay valve and a fifth pneumatic control reversing valve, a second pneumatic delay resetting switch formed by a third pneumatic delay valve and a fourth pneumatic control reversing valve, the right position of the three-position five-way middle-sealing type double-pneumatic control reversing valve and a right cavity air inlet of the actuating mechanism.
Optionally, a right output port of the sub-loop control valve is connected with an air inlet of the fourth pneumatic delay valve and an air inlet of the fifth pneumatic control reversing valve, an output port of the fifth pneumatic control reversing valve is connected with a control port of the fourth pneumatic delay valve, and an output port of the fourth pneumatic delay valve is connected with a control port of the fifth pneumatic control reversing valve, an air inlet and a control port of the third pneumatic delay valve and an air inlet of the fourth pneumatic control reversing valve; the output port of the third pneumatic delay valve is connected with the right control port of the fourth pneumatic reversing valve, the output port of the fourth pneumatic reversing valve is connected with the right position of the three-position five-way middle-seal type double pneumatic reversing valve, and the right output port of the three-position five-way middle-seal type double pneumatic reversing valve is connected with the right cavity air inlet of the executing mechanism.
Optionally, the input end of the first control sub-loop is communicated with a reset port of a second pneumatic delay-start switch in the second control sub-loop; the input end of the second control sub-loop is communicated with a reset port of the first pneumatic delay-start switch in the first control sub-loop.
Optionally, the output end of the first pneumatic delay starting switch in the first control sub-loop is communicated with the control end of the second pneumatic delay resetting switch in the second control sub-loop; the output end of the second pneumatic delay starting switch in the second control sub-loop is communicated with the control end of the first pneumatic delay resetting switch in the first control sub-loop.
Optionally, the air source comprises a compressed air bottle, a stop valve and a decompression filter which are sequentially connected along the fluid flow direction.
Optionally, a speed regulating valve is arranged on a pipeline between the three-position five-way middle-seal type double pneumatic control reversing valve and the actuating mechanism.
The invention has the beneficial effects that:
1. The invention adopts the middle sealing type double pneumatic control reversing valve to control the actuating mechanism so as to realize the remote control of the opening and closing of the air window, thereby avoiding the problem of casualties caused by personnel operating the closed air window at a close distance or explosion at the moment of unsealing.
2. The first pneumatic delay starting switch of the first control sub-loop is interlocked with the second pneumatic delay starting switch of the second control sub-loop, the first pneumatic delay reset switch of the first control sub-loop is interlocked with the second pneumatic delay reset switch of the second control sub-loop, and the interlocking of the first control sub-loop and the second control sub-loop is realized, so that when the first control sub-loop works, the second control sub-loop does not control the air flow output; when the second control sub-loop works, the first control sub-loop does not control air flow output, so that the control action of the three-position five-way double-air-control reversing valve is accurate and reliable, misoperation is avoided, and the reliability of the control system is improved.
3. The invention can realize the remote closing and opening of the airtight air window in the disaster area without connecting electricity and laying pipelines, solves the problem that the air window of the electric field cannot be closed and opened after the underground fire disaster of the coal mine, and the like, has high safety, and has convenient adjustment and reliable work of the pneumatic control system.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a mining disaster area closed air window and a driving cylinder thereof;
FIG. 2 is a schematic diagram of a pneumatic control system for controlling a mining disaster area wind window;
FIG. 3 is a schematic diagram II of a pneumatic control system for controlling a wind window in a mining disaster area.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1-3, a pneumatic control system for controlling a mining disaster area wind window includes a pneumatic control loop in communication with a gas source; the actuating mechanism 3 is communicated with the pneumatic control loop, and the actuating mechanism 3 is a double-acting cylinder; the output end of the actuating mechanism 3 is connected with the wind window 2; the pneumatic control circuit comprises a main driving sub-circuit for providing a driving air source for the actuating mechanism 3 and a control sub-circuit for controlling the position of an output valve of the main driving sub-circuit; the main driving sub-loop comprises a three-position five-way middle-sealing double-pneumatic control reversing valve 12 arranged between the control executing mechanism 3 and the air source; the control sub-loop comprises a first control sub-loop for controlling the three-position five-way middle-seal type double-pneumatic control reversing valve 12 to be connected with the left position at fixed time and reset in a delayed mode and a second control sub-loop for controlling the three-position five-way middle-seal type double-pneumatic control reversing valve 12 to be connected with the right position at fixed time and reset in a delayed mode after being controlled by the control sub-loop control valve 7.
The air source provides driving power for the pneumatic control loop and the actuating mechanism 3, and the retraction and the extension of the actuating mechanism 3 are controlled by the pneumatic control loop, so that the closing and the opening of the mining disaster area closed air window 2 are completed. The air source comprises a compressed air bottle 4, a stop valve 5 and a decompression filter 6 which are connected in sequence along the fluid flow direction.
The sub-loop control valve 7 of the invention is a manual two-position five-way reversing valve. The control sub-loop is divided into a first control sub-loop for controlling the three-position five-way middle-seal type double-pneumatic control reversing valve 12 to be connected with the right position in a timing mode and reset in a delayed mode and a second control sub-loop for controlling the three-position five-way middle-seal type double-pneumatic control reversing valve 12 to be connected with the left position in a timing mode and reset in a delayed mode after passing through the two-position five-way reversing valve. In this way, communication between the control sub-circuit, the main drive sub-circuit and the actuator 3 is achieved. Thus, the action (retraction and extension of the piston rod) of the actuating mechanism 3 is conveniently and flexibly controlled, and the closing and opening of the mining disaster area closed air window 2 are driven.
The first control sub-loop of the invention comprises a left position of a sub-loop control valve 7, a first pneumatic delay opening switch 18 formed by a first pneumatic delay valve 8 and a first pneumatic reversing valve 9, a first pneumatic delay reset switch 20 formed by a second pneumatic reversing valve 11 and a second pneumatic delay valve 10, a left position of a three-position five-way middle-sealing type double pneumatic reversing valve 12 and a left cavity air inlet of an actuating mechanism 3. In this way, communication between the first control sub-circuit and the actuator 3 is achieved. Therefore, the retraction of the piston rod of the actuating mechanism is conveniently and flexibly controlled, and the mining disaster area closed air window 2 is driven to be closed.
The left output port of the sub-loop control valve 7 is connected with the air inlet of the first pneumatic delay valve 8 and the air inlet of the first pneumatic reversing valve 9, the output port of the first pneumatic delay valve 9 is connected with the control port of the first pneumatic delay valve 8, and the output port of the first pneumatic delay valve 8 is connected with the control port of the first pneumatic reversing valve 9, the air inlet and the control port of the second pneumatic delay valve 10 and the air inlet of the second pneumatic reversing valve 11. Thus, the first pneumatic delay-start switch 18 is realized to be turned on in a delayed manner.
The output port of the second pneumatic delay valve 10 is connected to the left control port of the second pneumatic reversing valve 11, the output port of the second pneumatic reversing valve 11 is connected to the left position of the three-position five-way middle-seal type double pneumatic reversing valve 12, and the left output port of the three-position five-way middle-seal type double pneumatic reversing valve 12 is connected to the left cavity air inlet of the executing mechanism 3. Thus, the first pneumatic delay reset switch 20 is realized to be turned off in a delayed manner.
The second control sub-loop of the invention comprises the right position of the sub-loop control valve 7, a second pneumatic delay opening switch 19 formed by a fourth pneumatic delay valve 17 and a fifth pneumatic control reversing valve 16, a second pneumatic delay reset switch 21 formed by a third pneumatic delay valve 15 and a fourth pneumatic control reversing valve 14, the right position of the three-position five-way middle-sealing double pneumatic control reversing valve 12 and the right cavity air inlet of the actuating mechanism 3. In this way, communication between the first control sub-circuit and the actuator 3 is achieved. Therefore, the extension of the piston rod piece of the actuating mechanism 3 is conveniently and flexibly controlled, and the mining disaster area closed air window 2 is driven to be opened.
The right output port of the sub-loop control valve 7 is connected with the air inlet of the fourth pneumatic delay valve 17 and the air inlet of the fifth pneumatic control reversing valve 16, the output port of the fifth pneumatic control reversing valve 16 is connected with the control port of the fourth pneumatic delay valve 17, and the output port of the fourth pneumatic delay valve 17 is connected with the control port of the fifth pneumatic control reversing valve, the air inlet and the control port of the third pneumatic delay valve 15 and the air inlet of the fourth pneumatic control reversing valve 14. Thus, the second pneumatic delay-start switch 19 is realized to be turned on in a delayed manner.
The output port of the third pneumatic delay valve 15 is connected to the right control port of the fourth pneumatic reversing valve 14, the output port of the fourth pneumatic reversing valve 14 is connected to the right position of the three-position five-way middle-seal type double pneumatic reversing valve 12, and the right output port of the three-position five-way middle-seal type double pneumatic reversing valve 12 is connected to the right cavity air inlet of the executing mechanism 3. Thus, the second pneumatic delay reset switch 21 is turned off in a delayed manner.
The input end of the first control sub-loop, namely the air inlet of the first pneumatic delay valve 8 and the air inlet of the first pneumatic reversing valve 9, are communicated with the reset port of the second pneumatic delay start switch 19, namely the reset port of the fourth pneumatic delay valve 17, in the second control sub-loop; the input end of the second control sub-loop, namely the air inlet of the fourth pneumatic delay valve 17 and the air inlet of the fifth pneumatic control reversing valve 16, are communicated with the reset port of the first pneumatic delay opening switch 18 in the first control sub-loop, namely the reset port of the first pneumatic delay valve 8. This achieves that the first pneumatic time-delay on switch 18 of the first control sub-circuit is interlocked with the second pneumatic time-delay on switch 19 of the second control sub-circuit.
The output end of a first pneumatic delay switch 18 in a first control sub-loop, namely the output end of a first pneumatic delay valve 8, is communicated with the control end of a second pneumatic delay reset switch 21 in a second control sub-loop, namely the reset port of a third pneumatic delay valve 15 and the left control port of a fourth pneumatic control reversing valve 14; the output end of the second pneumatic delay switch 19 in the second control sub-loop, namely the output end of the fourth pneumatic delay valve 17, is communicated with the control end of the first pneumatic delay reset switch 20 in the first control sub-loop, namely the reset port of the second pneumatic delay valve 10 and the second control port of the second pneumatic control reversing valve 11. This achieves that the first pneumatic time-delay reset switch 20 of the first control sub-loop interlocks with the second pneumatic time-delay reset switch 21 of the second control sub-loop.
According to the invention, the first pneumatic delay starting switch 18 of the first control sub-loop is interlocked with the second pneumatic delay starting switch 19 of the second control sub-loop, the first pneumatic delay reset switch 20 of the first control sub-loop is interlocked with the second pneumatic delay reset switch 21 of the second control sub-loop, so that the interlocking of the first control sub-loop and the second control sub-loop is realized, the second control sub-loop does not control the air flow output when the first control sub-loop works, and the first control sub-loop does not control the air flow output when the second control sub-loop works, so that the three-position five-way double-air control reversing valve is accurate in control action, misoperation is avoided, and the reliability of the control system is improved.
The invention is provided with a speed regulating valve 13 on a pipeline between a three-position five-way middle sealing type double pneumatic control reversing valve 12 and an actuating mechanism 3. Thus, back pressure damping is formed in the cavity when the piston rod of the actuating mechanism 3 extends or retracts, so that the pushing speed and pushing force of the piston rod of the cylinder are stable, and the stable closing and opening of the wind window 2 are ensured.
The pneumatic control system for controlling the mining disaster area air windows can realize the remote closing and opening of the disaster area closed air windows 2 without connecting electricity and laying pipelines, thereby avoiding the problem of casualties caused by explosion when personnel operate close or unseal in a short distance.
Examples
A pneumatic control system for timing control of a mining disaster area air window is shown in fig. 1, wherein main components of the mining disaster area air window comprise a window frame 1 and an air window 2, the air window 2 is connected with an executing mechanism 3, and the executing mechanism 3 is a double-acting cylinder. When a fire disaster occurs in a coal mine and a closed partition wall is established, the air window needs to be closed rapidly and safely; when the fire zone is unsealed, the window needs to be opened quickly and safely. As shown in fig. 1, the wind window 2 is installed on the window frame 1 through a rotating shaft, and when the wind window 2 needs to be closed, the wind window 2 is pushed to rotate to a position attached to the window frame 1 along the rotating shaft; when the window 2 needs to be opened, the window 2 is pushed to rotate along the rotating shaft to form a certain angle with the window frame 1, so that the window is closed and opened.
In order to realize quick and safe closing and opening of the mining disaster area air window, the embodiment provides a pneumatic control system for controlling the mining disaster area air window, and the pneumatic control system can remotely operate the cylinder to act so as to control the closing and opening of the air window.
In an embodiment of the application, the pneumatic control system comprises: a gas source; a pneumatic control loop communicated with the air source; the actuating mechanism 3 is communicated with the pneumatic control loop, and the retraction and the extension of the actuating mechanism 3 are controlled by the pneumatic control loop, so that the closing and the opening of the mining disaster area closed air window 2 are completed.
In an embodiment of the application, the air supply comprises a cylinder 4 for storing compressed air and a shut-off valve 5 for controlling the output of compressed air in the cylinder 4, and a pressure reducing filter 6 for pressure regulation and cleaning of the output air flow. The pneumatic control circuit is communicated with the gas cylinder 4, the stop valve 5 and the decompression filter 6. Thus, the retraction and extension of the actuator 3 is achieved by the compressed gas in the cylinder 4 being fed into the pneumatic control circuit.
In an embodiment of the application, the pneumatic control circuit comprises a main drive sub-circuit for providing a drive gas source to the actuator 3 and a control sub-circuit for controlling the position of the output valve of the main drive sub-circuit.
In the embodiment of the application, a three-position five-way middle-seal type double-pneumatic control reversing valve 12 is connected to the main driving sub-loop. The three-position five-way middle sealing type double pneumatic control reversing valve 12 is controlled to be communicated with the left air outlet 122 or the right air outlet 123, and the retraction and the extension of the actuating mechanism 3 are controlled, so that the closing and the opening of the mining disaster area closed air window 2 are completed.
In the embodiment of the application, the control sub-loop is divided into a first control sub-loop for controlling the three-position five-way middle-seal type double-pneumatic control reversing valve 12 to be connected with the left position at fixed time and reset in a delayed manner and a second control sub-loop for controlling the three-position five-way middle-seal type double-pneumatic control reversing valve 12 to be connected with the right position at fixed time and reset in a delayed manner after passing through the control sub-loop control valve 7; wherein the control sub-loop control valve 7 is a two-position five-way reversing valve 7. In this way, communication between the control sub-circuit, the main drive sub-circuit and the actuator 3 is achieved. Thus, the action (retraction and extension of a piston rod) of the actuating mechanism 3 is conveniently and flexibly controlled, and the closing and opening of the mining disaster area closed air window 2 are driven.
In the embodiment of the application, the first control sub-loop comprises a left position of the control sub-loop control valve 7, a first pneumatic delay opening switch formed by the first pneumatic delay valve 8 and the first pneumatic delay valve 9, a first pneumatic delay reset switch formed by the second pneumatic delay valve 11 and the second pneumatic delay valve 10, a left position of the three-position five-way middle-sealing type double pneumatic delay valve 12 and a left cavity air inlet 35 of the actuating mechanism 3. In this way, communication between the first control sub-circuit and the actuator 3 is achieved. Therefore, the retraction of the piston rod of the actuating mechanism 3 is conveniently and flexibly controlled, and the mining disaster area closed air window 2 is driven to be closed.
In the embodiment of the application, the left output port 73 of the control sub-loop control valve 7 is connected to the air inlet 81 of the first pneumatic delay valve 8 and the air inlet 91 of the first pneumatic reversing valve 9, the output port 82 of the first pneumatic delay valve 8 is connected to the control port 93 of the first pneumatic reversing valve 9, and the output port 92 of the first pneumatic reversing valve 9 is connected to the control port 83 of the first pneumatic delay valve 8. Thus, the first pneumatic delay-start switch is delayed to be started.
In the embodiment of the application, the input port 101 of the second pneumatic delay valve 10, the control port 103 of the second pneumatic delay valve 10 and the input port 111 of the second pneumatic reversing valve 11 are connected, and the output port 102 thereof is connected to the left control port 113 of the second pneumatic reversing valve 11. Thus, the first pneumatic delay reset switch is turned off in a delay manner.
In the embodiment of the application, the second control sub-loop comprises a right position of the control sub-loop control valve 7, a second pneumatic delay opening switch formed by a fourth pneumatic delay valve 17 and a fifth pneumatic delay reversing valve 16, a second pneumatic delay reset switch formed by a fourth pneumatic delay reversing valve 14 and a third pneumatic delay valve 15, a right position of the three-position five-way middle sealing type double pneumatic control reversing valve 12 and a right cavity air inlet 36 of the actuating mechanism 3. In this way, communication between the second control sub-circuit and the actuator 3 is achieved. Therefore, the extension of the piston rod of the actuating mechanism 3 is conveniently and flexibly controlled, and the mining disaster area closed air window is driven to be opened.
In the embodiment of the application, the right output port 72 of the control sub-loop control valve 7 is connected to the air inlet 171 of the fourth pneumatic delay valve 17 and the air inlet 161 of the fifth pneumatic control reversing valve 16, the output port 172 of the fourth pneumatic delay valve 17 is connected to the control port 163 of the fifth pneumatic control reversing valve 16, and the output port 162 of the fifth pneumatic control reversing valve 16 is connected to the control port 173 of the fourth pneumatic delay valve 17. Thus, the second pneumatic delay-start switch is delayed to be started.
In the embodiment of the application, the control sub-loop control valve 7 is a manual reversing valve, and the air flow is switched on through the output port 71 or the output port 72 of the control sub-loop control valve 7 by controlling the position of the manual control handle.
In the embodiment of the application, the input port 151, the control port 153 of the third pneumatic delay valve 15 are connected with the input port 141 of the fourth pneumatic reversing valve 14, and the output port 152 of the third pneumatic delay valve is connected with the right control port 143 of the fourth pneumatic reversing valve 14; thus, the second pneumatic delay reset switch is turned off in a delay manner.
In the embodiment of the application, the input end of the first control sub-loop, namely the air inlet 81 of the first pneumatic delay valve 8 and the air inlet 91 of the first pneumatic reversing valve 9, are connected with the reset port of the second pneumatic delay switch in the second control sub-loop, namely the reset port 174 of the fourth pneumatic delay valve 17; the input end of the second control sub-loop, namely the air inlet 171 of the fourth pneumatic delay valve 17 and the air inlet 161 of the fifth pneumatic control reversing valve 16, are connected with the reset port of the first pneumatic delay opening switch in the first control sub-loop, namely the reset port 84 of the first pneumatic delay valve 8; the output end 82 of the first pneumatic delay switch in the first control sub-loop, namely the output end 82 of the first pneumatic delay valve 8, is connected with the control end of the second pneumatic delay reset switch in the second control sub-loop, namely the reset port 154 of the third pneumatic delay valve, and the left control port 144 of the fourth pneumatic control reversing valve 14; the output end 172 of the second pneumatic delay switch in the second control sub-loop, namely the output end 172 of the fourth pneumatic delay valve 17, is connected with the first pneumatic delay reset switch control end in the first control sub-loop, namely the reset port 104 of the second pneumatic delay valve, and the second control port 114 of the second pneumatic control reversing valve 11. The interlocking of the first control sub-loop and the second control sub-loop is realized, so that when the first control sub-loop works, the second control sub-loop does not control the air flow output, and when the second control sub-loop works, the first control sub-loop does not control the air flow output, so that the three-position five-way double-air control reversing valve is accurate and reliable in control action, misoperation is avoided, and the reliability of the control system is improved.
In the embodiment of the application, the actuator 3 is an actuator cylinder. The actuating cylinder is a double-acting cylinder including a cylinder body 31 and a piston rod 32 disposed within the cylinder body 31 and capable of extending and retracting relative to the cylinder body 31. The piston rod divides the interior of the cylinder body 31 into a left chamber 33 and a right chamber 34. The piston rod has an intake/exhaust port 35 and an intake/exhaust port 36 provided at both left and right ends of the cylinder body 31. The intake and exhaust ports 35 are in communication with the left chamber 33, and the intake and exhaust ports 36 are in communication with the right chamber 34. Thus, the bidirectional intake and bidirectional exhaust functions of the actuator 3 are realized.
In the embodiment of the application, a speed regulating valve 13 is respectively arranged between a left air outlet 122 of the three-position five-way middle-sealing type double-pneumatic control reversing valve 12 and a left cavity air inlet 35, a right air outlet 123 and a right cavity air inlet 36 of the actuating mechanism 3. In this way, back pressure damping is formed in the cavity when the piston rod 32 of the actuator 3 is extended or retracted, so that the pushing speed and pushing force of the piston rod 32 of the cylinder are stable, and stable closing and opening of the wind window 2 are ensured.
According to the embodiment of the invention, the process of timing control of closing and opening of the airtight wind window of the mining disaster area by the pneumatic control system comprises the following steps: first, the shutoff valve 5 is opened, and the compressed air stored in the compressed gas cylinder 4 enters the input port 61 of the pressure reducing filter 6 through the shutoff valve 5, is reduced in pressure by the pressure reducing filter 6, flows out of the output port 62, and enters the main drive sub-circuit and the control sub-circuit. The air flow entering the main driving sub-loop is connected to the air inlet 121 of the three-position five-way double-air-control reversing valve 12. The air flow entering the control sub-circuit is connected to the air inlet 71 of the control sub-circuit control valve 7. If the wind window is to be closed, the control handle of the control sub-loop control valve 7 is pulled leftwards, the control airflow flows out from the output port 73 of the control sub-loop control valve 7, flows into the first control sub-loop, and simultaneously flows into the reset port 174 of the fourth pneumatic delay valve 17in the second control sub-loop, and the valve of the second control sub-loop is cut off, so that no control airflow output of the second control sub-loop is ensured. The air flow flowing into the first control sub-loop simultaneously flows into the air inlet 81 of the first air-operated delay valve 8 and the air inlet 91 of the first air-operated directional valve 9, then the air outlet 92 of the first air-operated directional valve 9 is communicated with the control port 83 of the first air-operated delay valve 8, the air flow enters the control port 93 of the first air-operated directional valve 9, the first air-operated delay valve 9 starts timing, and when the count value reaches a set value, the air outlet 82 and the air inlet 81 of the first air-operated delay valve 9 are communicated and maintain a conducting state. The output air flow of the first air-operated delay valve 8 flows into the reset port 154 of the third air-operated delay valve 15 and the left control port 144 of the fourth air-operated reversing valve 14 in the second control sub-loop on one hand, the second control sub-loop valve is cut off to ensure that the second control sub-loop has no control air flow output, and flows into the air inlet 111 of the second air-operated reversing valve 11 on the other hand, flows into the left control port 124 of the three-position five-way middle-seal type double air-operated reversing valve 12 after passing through the air outlet 112, and flows into the left control port 124 of the three-position five-way middle-seal type double air-operated reversing valve 12 to be conducted left, and the air flow of the main driving sub-loop flows through the left air outlet 122 of the three-position five-way middle-seal type double air-operated reversing valve 12, the speed regulating valve 13 and the left air inlet 35 of the actuating mechanism 3 enter the left cavity 33 of the actuating mechanism 3 to push the piston rod 32 to move rightwards, so that the wind window is driven to be closed. The output air flow of the first air control reversing valve 9 flows into the air inlet 111 of the second air control reversing valve 11, and simultaneously flows into the air inlet 101 and the control port 103 of the second air control delay valve 10, the second air control delay valve 10 starts timing, when the count value reaches a set value, the air outlet 102 and the air inlet 101 of the second air control delay valve 10 are conducted and maintain the conducting state, the air flow flowing out from the air outlet 102 of the second air control delay valve 10 enters the first control port 113 of the second air control reversing valve, so that the second air control reversing valve 11 is closed, the output port 112 of the second air control reversing valve does not have output air flow, the control port of the three-position five-way middle sealing type double air control reversing valve 12 does not have air flow in, The automatic neutral position is recovered, and the main control sub-loop is cut off, so that the piston rod 32 of the actuating mechanism 3 is kept in a compressed state, and the wind window is kept closed. If the louver needs to be opened, only the air inlet 71 of the sub-circuit control valve 7 needs to be controlled. If the wind window is to be opened, the control handle of the control sub-loop control valve 7 is pulled rightwards, the air flow flows out of the output port 72 of the control sub-loop control valve 7 and flows into the second control sub-loop, and simultaneously flows into the reset port 84 of the first pneumatic delay valve 8 in the first control sub-loop, so that the valve of the first control sub-loop is cut off, and the first control sub-loop is ensured to have no control air flow output. Since the working principle and the functions of each component in the second control sub-loop are the same as those of the corresponding component in the first control sub-loop, detailed description is omitted for avoiding redundant description.
The pneumatic control system has the advantages of convenient adjustment and reliable operation, and can meet the requirement of remote operation of the airtight air window. The pneumatic control system for controlling the mining disaster area air window has the advantages that the remote closing and opening of the disaster area air window are realized without power connection and pipeline laying, and the problem of casualties caused by explosion in the moment of close-range operation of the closed air window or unsealing is effectively avoided.
In summary, the pneumatic control system for controlling the air windows of the mining disaster areas is particularly suitable for places where electricity cannot be used after underground coal mine fires, and the airtight air windows are automatically closed and opened in a long distance, so that the airtight and unsealing of the disaster areas are realized.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (7)
1. A pneumatic control system for controlling mining disaster area wind window, its characterized in that: comprises a pneumatic control loop communicated with an air source; an actuator in communication with the pneumatic control circuit; the output end of the actuating mechanism is connected with the air window; the pneumatic control loop comprises a main driving sub-loop for providing a driving air source for the executing mechanism and a control sub-loop for controlling the position of an output valve of the main driving sub-loop; the main driving sub-loop comprises a three-position five-way middle-seal type double-pneumatic control reversing valve arranged between the control executing mechanism and the air source; the control sub-loop comprises a first control sub-loop used for controlling the three-position five-way middle-sealing type double-pneumatic control reversing valve to be communicated with the left position and reset and a second control sub-loop used for controlling the three-position five-way middle-sealing type double-pneumatic control reversing valve to be communicated with the right position and reset after passing through the control sub-loop control valve;
The first control sub-loop is connected with the left position of the three-position five-way middle-sealing type double-pneumatic control reversing valve at fixed time and is delayed to reset, and comprises the left position of the sub-loop control valve, a first pneumatic delay starting switch consisting of a first pneumatic delay valve and a first pneumatic delay valve, a first pneumatic delay reset switch consisting of a second pneumatic delay valve and a second pneumatic delay valve, the left position of the three-position five-way middle-sealing type double-pneumatic control reversing valve and a left cavity air inlet of the executing mechanism;
The second control sub-loop is connected with the right position of the three-position five-way middle-sealing type double-pneumatic control reversing valve at fixed time and is delayed to reset, and comprises the right position of the sub-loop control valve, a second pneumatic delay starting switch formed by a fourth pneumatic delay valve and a fifth pneumatic control reversing valve, a second pneumatic delay reset switch formed by a third pneumatic delay valve and a fourth pneumatic control reversing valve, the right position of the three-position five-way middle-sealing type double-pneumatic control reversing valve and a right cavity air inlet of the executing mechanism;
and a speed regulating valve is arranged on a pipeline between the three-position five-way middle-sealing type double pneumatic control reversing valve and the actuating mechanism.
2. A pneumatic control system for controlling a mine disaster area wind window as set forth in claim 1, wherein: the sub-loop control valve is a manual two-position five-way reversing valve.
3. A pneumatic control system for controlling a mine disaster area wind window as set forth in claim 1, wherein: the left output port of the sub-loop control valve is connected with the air inlet of the first pneumatic delay valve and the air inlet of the first pneumatic reversing valve, the output port of the first pneumatic reversing valve is connected with the control port of the first pneumatic delay valve, and the output port of the first pneumatic delay valve is connected with the control port of the first pneumatic reversing valve, the air inlet of the second pneumatic delay valve, the control port and the air inlet of the second pneumatic reversing valve;
the output port of the second pneumatic delay valve is connected with the left control port of the second pneumatic reversing valve, the output port of the second pneumatic reversing valve is connected with the left position of the three-position five-way middle-seal type double pneumatic reversing valve, and the left output port of the three-position five-way middle-seal type double pneumatic reversing valve is connected with the left cavity air inlet of the executing mechanism.
4. A pneumatic control system for controlling a mine disaster area wind window as set forth in claim 1, wherein: the right output port of the sub-loop control valve is connected with the air inlet of the fourth pneumatic delay valve and the air inlet of the fifth pneumatic control reversing valve, the output port of the fifth pneumatic control reversing valve is connected with the control port of the fourth pneumatic delay valve, and the output port of the fourth pneumatic delay valve is connected with the control port of the fifth pneumatic control reversing valve, the air inlet and the control port of the third pneumatic delay valve and the air inlet of the fourth pneumatic control reversing valve;
The output port of the third pneumatic delay valve is connected with the right control port of the fourth pneumatic reversing valve, the output port of the fourth pneumatic reversing valve is connected with the right position of the three-position five-way middle-seal type double pneumatic reversing valve, and the right output port of the three-position five-way middle-seal type double pneumatic reversing valve is connected with the right cavity air inlet of the executing mechanism.
5. A pneumatic control system for controlling a mine disaster area wind window as set forth in claim 1, wherein: the input end of the first control sub-loop is communicated with a reset port of a second pneumatic delay start switch in the second control sub-loop; the input end of the second control sub-loop is communicated with a reset port of the first pneumatic delay-start switch in the first control sub-loop.
6. A pneumatic control system for controlling a mine disaster area wind window as set forth in claim 1, wherein: the output end of the first pneumatic delay starting switch in the first control sub-loop is communicated with the control end of the second pneumatic delay resetting switch in the second control sub-loop; the output end of the second pneumatic delay starting switch in the second control sub-loop is communicated with the control end of the first pneumatic delay resetting switch in the first control sub-loop.
7. A pneumatic control system for controlling a mine disaster area wind window as set forth in claim 1, wherein: the air source comprises a compressed air bottle, a stop valve and a decompression filter which are sequentially connected along the fluid flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364099.5A CN112360540B (en) | 2020-11-27 | Pneumatic control system for controlling mining disaster area wind windows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364099.5A CN112360540B (en) | 2020-11-27 | Pneumatic control system for controlling mining disaster area wind windows |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112360540A CN112360540A (en) | 2021-02-12 |
| CN112360540B true CN112360540B (en) | 2024-07-12 |
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| CN106256987A (en) * | 2015-06-17 | 2016-12-28 | 中国石油化工股份有限公司 | A kind of atmospheric control for remotely controlling cementing tool |
| CN208010387U (en) * | 2018-03-06 | 2018-10-26 | 陈业武 | A kind of air door automatic gas control delay lock device |
| CN213684203U (en) * | 2020-11-27 | 2021-07-13 | 中煤科工集团重庆研究院有限公司 | Pneumatic control system for controlling wind window of mining disaster area |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202402061U (en) * | 2011-12-16 | 2012-08-29 | 姚坡元 | Full-pneumatic interlocking non-pressure air door control system |
| CN106256987A (en) * | 2015-06-17 | 2016-12-28 | 中国石油化工股份有限公司 | A kind of atmospheric control for remotely controlling cementing tool |
| CN208010387U (en) * | 2018-03-06 | 2018-10-26 | 陈业武 | A kind of air door automatic gas control delay lock device |
| CN213684203U (en) * | 2020-11-27 | 2021-07-13 | 中煤科工集团重庆研究院有限公司 | Pneumatic control system for controlling wind window of mining disaster area |
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