Mechanical locking device for double air doors in underground coal mine

Abstract

The utility model discloses an underground coal mine double-leaf air door mechanical locking device which comprises an air control box and an air door control mechanism which are installed in an underground coal mine, and the air control box can control opening and closing of a double-leaf air door by driving the air door control mechanism. The air door control mechanism comprises two sets of driving pieces, the output ends of the driving pieces are connected to the inner side of one air door through a first traction assembly to control opening of the air door, and the output ends of the driving pieces are further connected to the outer side of one air door through a second traction assembly to control closing of the air door. The air door control structure is arranged, the internal driving piece controls opening of the air door through the first traction assembly, then the internal driving piece further controls closing of the air door through the second traction assembly, the second traction assembly penetrating through the air door wall is installed at the end of the action rod of the driving piece, manual opening of the air door is reversely controlled, and the air door control effect is improved. The opening of the air door is only controlled by pneumatic operation; and then automatic locking of the air doors is achieved through pneumatic interlocking of opening of the air doors.

Description

Technical Field

[0001] This utility model relates to the field of coal mine tunnel engineering technology, specifically to a mechanical locking device for a double-leaf air door in underground coal mines. Background Technology

[0002] In the use of ventilation doors in coal mine tunnels, the two ventilation doors must be interlocked. That is, when one ventilation door is open, the other must be locked closed to prevent both doors from opening simultaneously, causing a short circuit in airflow and affecting safe production in the mine. For single-leaf ventilation doors with close spacing, interlocking between the two doors can be easily achieved through interlocking ropes connecting them. However, for the widely used double-leaf ventilation doors and long-spacing ventilation doors used in long monorail trains, the long spacing between the two doors and the short opening and closing stroke of the double-leaf doors (generally half the opening and closing stroke of a single-leaf door) make it difficult to achieve the interlocking function between the two doors.

[0003] The existing double-leaf damper interlocking system is limited by the short opening and closing stroke of the dampers and the long distance between them, making it difficult for the dampers to achieve a true locking function. Furthermore, due to the relatively long locking rope, it is difficult to open the dampers normally, thus failing to achieve the automatic closing function.

[0004] Existing door locking technologies, especially for double-leaf doors with long spacing, struggle to achieve effective locking between the two doors and prevent the double-leaf doors from closing automatically. Therefore, this application proposes a mechanical locking device for double-leaf doors in coal mines to address these shortcomings. Utility Model Content

[0005] The technical problem to be solved by this utility model is: how to solve the problem of the difficulty in locking long-distance double-leaf dampers.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A mechanical interlocking device for a double-leaf air door in an underground coal mine includes a pneumatic control box and an air door control mechanism installed underground in the coal mine. The pneumatic control box can control the opening and closing of the double-leaf air door by driving the air door control mechanism.

[0008] The damper control mechanism includes two sets of driving components. The output end of the driving component is connected to the inside of one of the dampers through a traction component one to control the opening of the damper. The output end of the driving component is also connected to the outside of one of the dampers through a traction component two to control the closing of the damper.

[0009] This application sets up a damper control structure. The internal drive unit controls the opening of the damper through traction component one, and then the internal drive unit also controls the closing of the damper through traction component two. By installing traction component two, which passes through the damper wall, at the end of the drive unit's actuating rod, the manual opening of the damper is controlled in the reverse direction, so that the opening of the damper can only be controlled by pneumatic operation. Then, through the pneumatic interlock between the opening of the dampers, the damper is automatically locked.

[0010] As a further embodiment of this utility model: a guide pulley is installed on the wall of the underground roadway in the coal mine, on the side of the drive component facing the air door.

[0011] As a further embodiment of this utility model: the traction component one includes a damper opening rope, one end of which is connected to the output end of the drive component, and the other end passes through the guide pulley two and is connected to the fixing component one inside the damper.

[0012] As a further embodiment of this utility model: a guide pulley three is installed on the tunnel wall in the coal mine and on the side of the drive component facing the air door; a guide pulley four is installed on the air door wall outside the air door; and a guide pulley one is installed on the drive component.

[0013] As a further embodiment of this utility model: the second traction component includes a locking rope, one end of which is connected to the output end of the drive component, and the other end passes through the first guide pulley, the third guide pulley, and the fourth guide pulley and is then connected to the second fixing component on the outside of the damper.

[0014] As a further embodiment of this utility model: both sets of driving components are cylinders, and are respectively installed on the tunnel wall in the coal mine.

[0015] As a further embodiment of this utility model: the tunnel wall in the underground coal mine is also equipped with a damper switch one and a damper switch two for controlling two sets of drive components, wherein both damper switch one and damper switch two are connected to the pneumatic control box.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This application sets up a damper control structure. The internal drive unit controls the opening of the damper through traction component one, and then the internal drive unit also controls the closing of the damper through traction component two. By installing traction component two, which passes through the damper wall, at the end of the drive unit's actuating rod, the manual opening of the damper is controlled in reverse, so that the opening of the damper can only be controlled by pneumatic operation. Then, through the pneumatic interlock between the opening of the dampers, the damper is automatically locked.

[0018] The locking rope and guide pulley block of this application are installed through the door wall to prevent the door from being opened manually, so that the door can be completely controlled by the pneumatic device of the door. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the mechanical interlocking device for two sets of double-leaf air doors in a coal mine, according to an embodiment of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of a single-group double-leaf damper mechanical locking device according to an embodiment of the present invention;

[0021] Figure 3 This is a structural block diagram of a mechanical interlocking device for two sets of double-leaf air doors in a coal mine, according to an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Damper 1; 11. Cylinder; 111. Cylinder end; 12. Guide pulley 1; 13. Guide pulley 2; 14. Locking rope; 15. Guide pulley 3; 16. Damper opening rope; 17. Fixing component 1; 18. Fixing component 2; 19. Guide pulley 4; 110. Damper;

[0024] 2. Damper 2; 3. Damper 1 switch; 4. Damper 2 switch; 5. Pneumatic control box. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Reference Figure 1 A mechanical locking device for double-leaf air doors in underground coal mines is installed in the roadways of underground coal mines. Air doors 1 and 2 are set at certain intervals in the roadways. Both air doors 1 and 2 are double-leaf air doors, and an air door control mechanism is set on one side of the corresponding air door to control the automatic opening and closing of the double-leaf air doors.

[0027] The structures of damper 1 and damper 2 are the same. We will now take damper 1 as an example for explanation. Damper 2 is the same.

[0028] Reference Figure 1 and Figure 2The air door 1 is a double-leaf air door, with the door frames on both sides of the double-leaf air door installed on the tunnel wall; the air door control structure on one side of the air door 1 includes two sets of cylinders 11 installed on the tunnel wall, the output end of the cylinder 11 is provided with a cylinder end 111, and a guide pulley 12 is also installed on the cylinder 11; a guide pulley 2 13 and a guide pulley 3 15 are installed on the tunnel wall and between the cylinder 11 and the air door, and a guide pulley 4 19 is installed on the air door wall opposite to the cylinder 11 of the air door 1.

[0029] It should be noted that, in order to control the double-leaf damper, the cylinder 11, guide pulley 12, guide pulley 2 13, guide pulley 3 15 and guide pulley 4 19 of this application are all symmetrically arranged in two independent sets for independently controlling the double-leaf damper.

[0030] Reference Figure 2 The cylinder end 111 is connected to one end of the damper opening rope 16, and the other end of the damper opening rope 16 passes around the guide pulley 2 13 and is connected to the fixing part 17 on the inner side of the damper 1. The fixing part 17 can be fixed by a screw. When the cylinder 11 works, it pulls the cylinder end 111 down, which can pull the damper opening rope 16 down, thereby pulling one of the dampers 110 in the damper 1 to open.

[0031] Reference Figure 2 The cylinder end 111 is connected to one end of the locking rope 14. The other side of the locking rope 14 passes through guide pulley 12, guide pulley 3 15, and guide pulley 4 19 in sequence, and finally connects to the fixing part 2 18 on the outside of the damper 1. The fixing part 2 18 can be fixed with a screw. When the cylinder 11 works, it drives the cylinder end 111 to move upward. Under the action of the cylinder end 111, the locking rope 14 pulls the other damper 110 in the damper 1 to close. Figure 2 State. By installing a locking rope 14 through the damper wall at the cylinder end 111 of the damper cylinder, the manual opening of the damper is controlled in reverse, so that the opening of the damper can only be controlled by the pneumatic operation of the cylinder; then, the damper is locked by the pneumatic interlock between the opening of the dampers.

[0032] Reference Figure 1 In this application, a first air door switch, a second air door switch, and a pneumatic control box 5 are also installed in the tunnel. Both the first air door switch and the second air door switch are connected to the pneumatic control box 5. The two sets of cylinders at air door 1 and the two sets of cylinders at air door 2 are also connected to the pneumatic control box 5. Therefore, the first air door switch can control the two sets of cylinders at air door 1 to work together, thereby controlling the automatic opening and closing of the two air doors at air door 1. The second air door switch can control the two sets of cylinders at air door 2 to work, thereby controlling the automatic opening and closing of the two air doors at air door 2.

[0033] It should be noted that the locking rope 14 is made of 10mm diameter steel wire rope; the damper opening rope 16 is made of 15mm diameter steel wire rope.

[0034] The specific operating principle of this application is as follows:

[0035] The damper operates as follows: When cylinder 11 extends outward, the locking rope 14 fixed to the cylinder end 111, guided by guide pulleys 12, 35, and 49, closes the damper. When cylinder 11 retracts inward, the damper opening rope 16 fixed to the cylinder opens the damper via guide pulley 2 13.

[0036] It should be noted that when the damper is fixed in the closed state, the cylinder end 111 extends to its longest position. The cylinder extension rod will be fixed when the cylinder is not activated. If someone opens the damper, the damper cannot be opened due to the restriction of the locking rope 14.

[0037] The principle of damper interlocking: Figure 1 As shown, the air circuit system for the opening cylinders of the two dampers (damper 1 and damper 2) to achieve interlocking is controlled by the air control box 5. The air control box 5 achieves the interlocking between the two dampers. That is, when damper 1 is open, damper 2 is locked by the air control box 5 and cannot be opened by the switch button of damper 2. When damper 2 is open, damper 1 is locked by the air control box 5 and cannot be opened by the switch button of damper 1. In other words, when one damper is open, the other damper cannot be opened by the start button, nor can it be opened manually due to the restriction of the locking rope 14, thus achieving the mutual interlocking effect between the dampers.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mechanical interlocking device for a double-leaf air door in an underground coal mine, characterized in that, It includes a pneumatic control box (5) installed underground in a coal mine and a damper control mechanism. The pneumatic control box (5) can control the opening and closing of the double-leaf damper by driving the damper control mechanism. The damper control mechanism includes two sets of driving components. The output end of the driving component is connected to the inside of one of the dampers through a traction component one to control the opening of the damper. The output end of the driving component is also connected to the outside of one of the dampers through a traction component two to control the closing of the damper.

2. The mechanical interlocking device for a double-leaf air door in a coal mine according to claim 1, characterized in that: A guide pulley 2 (13) is installed on the wall of the roadway in the coal mine and on the side of the drive unit facing the air door.

3. The mechanical interlocking device for a double-leaf air door in a coal mine according to claim 2, characterized in that: The traction assembly includes a damper opening rope (16), one end of which is connected to the output end of the drive unit, and the other end passes through the guide pulley (13) and is connected to the fixing member (17) inside the damper.

4. The mechanical interlocking device for a double-leaf air door in an underground coal mine according to claim 1, characterized in that: A guide pulley three (15) is installed on the tunnel wall in the coal mine and on the side of the drive unit facing the air door. A guide pulley four (19) is installed on the air door wall outside the air door. A guide pulley one (12) is installed on the drive unit.

5. A mechanical interlocking device for a double-leaf air door in an underground coal mine according to claim 4, characterized in that: The second traction component includes a locking rope (14), one end of which is connected to the output end of the drive component, and the other end passes through the first guide pulley (12), the third guide pulley (15), and the fourth guide pulley (19) and is connected to the second fixing component (18) on the outside of the damper.

6. The mechanical interlocking device for a double-leaf air door in an underground coal mine according to claim 1, characterized in that: Both sets of drive components are cylinders (11) and are respectively installed on the tunnel wall in the coal mine.

7. The mechanical interlocking device for a double-leaf air door in a coal mine according to claim 1, characterized in that: The underground roadway wall of the coal mine is also equipped with a damper switch (3) and a damper switch (4) for controlling two sets of drive components, wherein the damper switch (3) and the damper switch (4) are both connected to the pneumatic control box (5).

Images