CN-122014320-A - Pneumatic control system for full-time locking of mine air door

Abstract

The invention belongs to the field of pneumatic control, and discloses a full-time locking pneumatic control system for a mine air door, which comprises an air cylinder for driving the air door to open and close and an air door control air path connected with the air cylinder, wherein the air door control air path comprises an air door outside/inside door opening control valve, a door closing control valve, an unlocking valve, an air cylinder executing valve, a locking signal valve, a locking executing valve and an air source processing device. The two independent air door control air paths are connected with the locking execution valve through the locking signal valve, so that two doors are locked. When the locking is not performed, the door opening pneumatic signal can smoothly reach the cylinder execution valve through the locking execution valve to drive the cylinder execution valve to change direction. When any one air door is in a closed state in the opening process, the closing process or the complete opening process, the closed signal valve completes the conversion of the pneumatic signals, particularly the gradually reduced pneumatic signals in the closing process of the air door can be changed into more stable pneumatic signals and timely transmitted to the closed executing valve, and the transmission of the pneumatic signals of the opening of the other air door is cut off, so that the full-time closing is realized.

Inventors

• Yan Guxin
• HE SHUDONG
• XU HAOYU
• HU YUPENG
• WANG ZEJUN
• YAO YAHU
• ZHANG HAO
• LIU FEI
• CHEN SHUPENG
• HAN CHAO
• LIU ZHE
• ZHAO JIYU
• YUAN XIAOPING

Assignees

• 中煤科工集团重庆研究院有限公司

Dates

Publication Date

20260512

Application Date

20260402

Claims (11)

1. 1. A pneumatic control system for full-time locking of a mine air door is characterized by comprising an air cylinder for driving the air door to open and close and an air door control air path which is connected with the air cylinder and controls the air door to act; The air door control air circuit comprises an air door outer door opening control valve, an air door outer door closing control valve, an air door inner door opening control valve, an air door inner door closing control valve, an unlocking valve, an air cylinder executing valve, a locking signal valve, a locking executing valve and an air source processing device; the air source treatment device is positioned at the starting position of the air door control air path and provides a stable and clean air source for the whole control air path; The air outlet of the air source treatment device is communicated with the air inlet of the air cylinder executing valve, the air inlet of the air door outside door opening control valve, the air inlet of the air door outside door closing control valve, the air inlet of the air door inside door opening control valve, the air inlet of the air door inside door closing control valve, the air inlet of the locking signal valve and the control port of the unlocking valve; The air outlet of the air door outside door opening control valve and the air outlet of the air door inside door opening control valve are connected to the air inlet of the locking execution valve through a three-way connector, the air outlet of the locking execution valve is connected to the first control port of the air cylinder execution valve again, a door opening pneumatic signal is transmitted to the air cylinder execution valve through the locking execution valve, the air cylinder execution valve is driven to a first working state, and the air cylinder extends out to realize the opening of the air door; The air outlet of the air door outer side door closing control valve and the air outlet of the air door inner side door closing control valve are connected to a second control port of the air cylinder executing valve through a three-way connector together, a door closing pneumatic signal is transmitted to the air cylinder executing valve, the air cylinder executing valve is driven to a second working state, and the air cylinder is retracted to realize closing of the air door; the first air outlet of the air cylinder executing valve is connected with a rodless cavity interface of the air cylinder and a control port of the locking signal valve through a three-way joint, the second air outlet is connected with an air inlet of the unlocking valve, the air outlet of the unlocking valve is connected with a rod cavity interface of the air cylinder, when an air source is sufficient, the unlocking valve enables the rod cavity of the air cylinder to maintain certain air pressure to keep the air door tightly closed, and when the air source is disconnected, the unlocking valve automatically releases pressure to allow the air door to be pushed manually.
2. 2. The pneumatic control system for full-time locking of mine air doors according to claim 1, wherein two air cylinders and air door control air paths are provided, each air cylinder is correspondingly connected with one air door, and the two air door control air paths are connected through an air pipe to realize independent or locking control of the two air doors.
3. 3. The system of claim 2, wherein the air outlets of the blocking signal valves are connected to the control ports of the blocking actuator valves; The air valve is a two-position three-way air-blocking control valve, the air outlet of the air valve is connected to the control port of the air valve control air circuit, the air signal of the air valve opening is transmitted to the air valve control air circuit, and the air signal is used as a blocking signal to prevent the air valve from being opened; The locking execution valve is a two-position three-way normal ventilation control valve, an air inlet of the locking execution valve receives a door opening signal of the door opening control valve at the outer side of the air door and the door opening control valve at the inner side of the air door, the locking execution valve is kept in a normal-open state when the locking execution valve does not receive the locking signal, the door opening signal is transmitted to a first control port of the air cylinder execution valve to realize the opening of the air door, and the locking execution valve cuts off the transmission of the door opening signal when receiving the locking signal to prevent the air door from opening and realize the locking.
4. 4. The pneumatic control system for fully locking a mine air door according to claim 3, wherein the air cylinder executing valve is a two-position five-way double-control pneumatic control valve, a first control port of the air cylinder executing valve receives a door opening signal output by the locking executing valve and then switches to a first working state to control the air cylinder to extend, and a second control port of the air cylinder executing valve receives an air door inner door closing control valve signal and an air door outer door closing control valve signal and then switches to a second working state to control the air cylinder to retract in the closing control process.
5. 5. The pneumatic control system for full time blocking of a mine damper of claim 1, wherein said unlocking valve is a two-position, three-way, air shutoff control valve.
6. 6. The pneumatic control system for fully locking the mine air door according to claim 1, wherein the air door outer door opening control valve, the air door outer door closing control valve, the air door inner door opening control valve and the air door inner door closing control valve are two-position two-way self-resetting mechanical button valves, and output pneumatic signals after being pressed and automatically reset after being released.
7. 7. The pneumatic control system for fully locking a mine air door according to claim 1, wherein the air source processing device is a pneumatic linkage, and a stable air source after filtration and pressure regulation is continuously provided to an air inlet of the cylinder executing valve, an air inlet of the air door outside door opening control valve, an air inlet of the air door outside door closing control valve, an air inlet of the air door inside door opening control valve, an air inlet of the air door inside door closing control valve, an air inlet of the locking signal valve and a control opening of the unlocking valve in the whole opening and closing control process.
8. 8. The pneumatic control system for full time closing of a mine damper of claim 1, wherein said cylinder is a standard linear piston cylinder connected to a damper opening and closing mechanism.
9. 9. The pneumatic control system for full time blocking of a mine damper as set forth in claim 1 wherein said cylinder actuator is provided with throttle valves positioned in the intake and exhaust paths thereof for controlling the rate of opening and closing of the damper by controlling the flow of intake and exhaust during the opening and closing control.
10. 10. The pneumatic control system for full-time locking of mine air doors according to claim 2, wherein the air source processing devices in the two air door control air paths are mutually independent, and air sources after filtration and pressure regulation are respectively provided in the opening and closing control process of the respective air doors, so that the influence of single-path air source fluctuation on the integral locking function is avoided.
11. 11. The pneumatic control system for full-time locking of a mine air door according to claim 2, wherein the air door outer door opening control valve, the air door outer door closing control valve, the air door inner door opening control valve, the air door inner door closing control valve, the unlocking valve, the air cylinder executing valve, the locking signal valve and the locking executing valve are all pneumatic valves, and full-time locking of two air doors is achieved in the whole air door opening and closing control process through pneumatic signals.

Description

Pneumatic control system for full-time locking of mine air door Technical Field The invention belongs to the technical field of pneumatic control, and relates to a pneumatic control system for full-time locking of a mine air door, which is applied to locking of two air doors of a mine communication roadway. Background In the field of underground space engineering such as mines, air doors are generally arranged between key connecting lanes, and mainly play a role in personnel and goods transportation and ventilation network regulation and control. The stability and the reliable locking in the using process of the air door are greatly related to the safety of the mine. With the development of pneumatic control technology, the opening mode of the air door is changed from manual push-pull to pneumatic or hydraulic automatic control mode, so that the passing efficiency of the air door is greatly improved, and meanwhile, the locking mode of the air door is also developed into a multi-mode locking system such as air channel locking from traditional mechanical locking. The most currently used pneumatically controlled damper systems are capable of achieving lockout in most cases, but in certain specific situations, such as air supply interruption, damper closing procedures, etc., lockout failures occur. Such control systems lack an effective full time lockout mechanism. If the locking failure occurs, after the two air doors are simultaneously opened, the air flow is short-circuited, the air flow is disturbed, and potential safety hazards such as gas aggregation are caused. Thus, there is a need for a pneumatic control system for full time blocking of mine dampers that improves mine safety. Disclosure of Invention Therefore, the invention aims to solve the problem that an effective full-time locking mechanism is lacking in the prior art, and provides a pneumatic control system for full-time locking of a mine air door, which utilizes the air channel state change in the opening or closing process of the air door, and a locking signal valve is used for transmitting a locking signal to drive a locking executing valve so as to lock the air door, thereby improving the mine safety. In order to achieve the above purpose, the present invention provides the following technical solutions: a pneumatic control system for full-time locking of a mine air door comprises an air cylinder for driving the air door to open and close and an air door control air circuit which is connected with the air cylinder and controls the air door to act; The air door control air circuit comprises an air door outer door opening control valve, an air door outer door closing control valve, an air door inner door opening control valve, an air door inner door closing control valve, an unlocking valve, an air cylinder executing valve, a locking signal valve, a locking executing valve and an air source processing device; the air source treatment device is positioned at the starting position of the air door control air path and provides a stable and clean air source for the whole control air path; Specifically, the air outlet of the air source processing device is communicated with the air inlet of the air cylinder executing valve, the air inlet of the air door outside door opening control valve, the air inlet of the air door outside door closing control valve, the air inlet of the air door inside door opening control valve, the air inlet of the air door inside door closing control valve, the air inlet of the locking signal valve and the control port of the unlocking valve. The air outlet of the air door outside door opening control valve and the air outlet of the air door inside door opening control valve are connected to the air inlet of the locking execution valve through a three-way connector, and the air outlet of the locking execution valve is connected to the first control port of the air cylinder execution valve. The door opening pneumatic signal can be transmitted to the cylinder execution valve through the locking execution valve, the cylinder execution valve is driven to a first working state, and the cylinder extends out to realize the opening of the air door; the air outlet of the air door outer side door closing control valve and the air outlet of the air door inner side door closing control valve are connected to the second control port of the air cylinder executing valve through a three-way connector. Therefore, a door closing pneumatic signal can be directly transmitted to the cylinder execution valve, the cylinder execution valve is driven to a second working state, and the cylinder is retracted, so that the air door is closed; the first air outlet of the cylinder executing valve is connected with the rodless cavity interface of the cylinder and the control port of the locking signal valve through a three-way joint, and the second air outlet is connected with the air inlet of the unlocking valve; Further, the unlocking valve has an automati