An interlocked air door for use in a mine

Abstract

The utility model discloses a kind of interlocked air door under mine, including front air door and rear air door, air door interlocking mechanism is installed on front air door and rear air door, and the middle part of front air door or rear air door closing side door frame is fixedly connected to the other end of spring in the middle part of front air door and rear air door, spring stretches when front air door or rear air door opens, spring wire diameter is 5-8mm, outer diameter is 30-35mm, length is the half of the stroke of air door opening 90 °;When air door needs to be closed, as long as person releases air door, air door can be automatically closed under the restoring force of spring.

Description

Technical Field

[0001] This utility model belongs to the field of mine ventilation technology, specifically relating to an interlocking air door in a mine. Background Technology

[0002] Air doors are crucial structures in mine ventilation systems. They isolate airflow, creating conditions for the on-demand distribution of mine airflow and facilitating pedestrian and transportation access. A set of air doors consists of two sections, with the distance between the two sections ranging from 5 to 50 meters. Simultaneous opening of both air doors can cause airflow short-circuiting or significant air leakage, leading to ventilation system malfunctions. To address this issue, an interlocking device was designed to prevent the opening of one air door while the other is closed.

[0003] Existing damper interlocking devices directly connect two dampers with steel wire ropes. The interlocking is achieved by controlling the length of the wire rope (the distance between dampers + the travel of a single damper when fully open) (meaning that when one damper is open, the other cannot be opened). Because the dampers cannot close automatically, they are designed with an angle of approximately 87° during construction, relying solely on the gravity generated by the 87° inclination of the wall for automatic closure. However, the use of steel wire ropes passing through iron pipes creates resistance to the dampers, sometimes making it difficult to close them completely, especially when the dampers are heavy. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an interlocked air door for underground mines, which can automatically close and realize the interlocking of air doors.

[0005] The technical solution of this utility model is an interlocking air door for underground mines, including a front air door and a rear air door. Both the front and rear air doors are equipped with an air door interlocking mechanism. One end of a spring is fixedly connected to the middle of both the front and rear air doors, and the other end of the spring is fixedly connected to the middle of the door frame on the closed side of the front or rear air door. When the front or rear air door is opened, the spring is stretched. The spring wire diameter is 5-8mm, the outer diameter is 30-35mm, and the length is half of the stroke of the air door when it is opened 90°.

[0006] Furthermore, the aforementioned damper interlocking mechanism includes a first locking mechanism, a second locking mechanism, a first electromagnetic switch, and a second electromagnetic switch. The first electromagnetic switch and the second electromagnetic switch are respectively installed on the front damper and the rear damper to sense the opening and closing status of the dampers. The first locking mechanism includes a first electric telescopic rod, which is fixedly installed on the wall above the front damper. The end of the first electric telescopic rod is connected to a first pin, which extends vertically towards the front damper. The front damper has a first insertion hole corresponding to the first pin. The first pin is inserted into or disengaged from the first insertion hole as the first electric telescopic rod extends or retracts. The first electric telescopic rod is electrically connected to a first relay, which is electrically connected to a power supply and the second electromagnetic switch. The structure of the second locking mechanism is the same as that of the first locking mechanism, and it is installed on the rear damper. The first electromagnetic switch is electrically connected to the second locking mechanism through the second relay.

[0007] Furthermore, the end of the pole body of the first or second electric telescopic pole is connected to the first or second pin via a rope.

[0008] Furthermore, a first pin guide tube is provided above the first socket on the door frame of the front damper, and a second pin guide tube is provided above the second socket on the door frame of the rear damper.

[0009] Furthermore, the first electromagnetic switch includes an energizing component and a magnet component. The energizing component is installed on the door frame at the top of the front damper, and the magnet component is installed on the front damper in correspondence with the energizing component. When the damper is closed, the magnet component is connected to the energizing component. The second electromagnetic switch has the same structure as the first electromagnetic switch.

[0010] Compared to existing technologies, the advantages of this invention are as follows: By installing a spring between the middle of the damper and the door frame on the closed side of the damper, with a spring wire diameter of 5-8mm, an outer diameter of 30-35mm, and a length that is half the travel of the damper when it is opened 90°, the damper can automatically close under the restoring force of the spring when it needs to be closed, as long as the person releases the damper. At the same time, the damper interlocking mechanism is improved by installing electric telescopic rods on the front and rear dampers. The electric telescopic rods are connected to an electromagnetic switch via a relay. The electromagnetic switch senses the opening and closing status of the dampers. When one damper is opened, the electromagnetic switch on that damper is opened, the normally open contact of the relay is opened, the normally closed contact is closed, the current direction is changed, and the rod of the electric telescopic rod on the opposite door frame extends so that the corresponding pin is inserted into the socket on the door leaf, thus realizing the damper interlock. This replaces the existing method of connecting the damper with a steel wire rope through an iron pipe to achieve interlocking, avoiding the tension of the steel wire rope from hindering the closing of the damper and facilitating the complete closure of the damper. Attached Figure Description

[0011] Figure 1 This is a front view of the front air vent;

[0012] Figure 2Side view of the front and rear air vents;

[0013] Figure 3 This is a front view of the rear air damper;

[0014] Figure 4 This is a schematic diagram of spring installation;

[0015] Figure 5 This is a circuit diagram showing the connection between the electromagnetic switch and the electric telescopic pole. Detailed Implementation

[0016] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.

[0017] Example 1

[0018] like Figure 1-5 As shown, a mine interlocking air door includes a front air door 5 and a rear air door 6. Both the front air door 5 and the rear air door 6 are equipped with an air door interlocking mechanism. One end of a spring 10 is fixedly connected to the middle of the front air door 5 and the rear air door 6. The other end of the spring 10 is fixedly connected to the middle of the door frame on the closed side of the front air door 5 or the rear air door 6. When the front air door 5 or the rear air door 6 is opened, the spring 10 is stretched. The spring 10 has a wire diameter of 5-8mm, an outer diameter of 30-35mm, and a length that is half of the stroke of the air door when it is opened 90°. When the air door needs to be closed, as long as a person releases the air door, the air door can be automatically closed under the restoring force of the spring.

[0019] Furthermore, the damper interlocking mechanism includes a first locking mechanism 1, a second locking mechanism 2, a first electromagnetic switch 3, and a second electromagnetic switch 4. The first electromagnetic switch 3 and the second electromagnetic switch 4 are respectively installed on the front damper 5 and the rear damper 6 to sense the opening and closing status of the dampers. The first locking mechanism 1 includes a first electric telescopic rod 101, which is fixedly installed on the wall above the front damper 5. The end of the first electric telescopic rod 101 is connected to a first pin 102, and the first pin 102 extends vertically to the front damper 5. The front damper 5 has a first insertion hole 103 corresponding to the first pin 102. The first pin 102 is inserted into or disengaged from the first insertion hole 103 as the first electric telescopic rod 101 extends or retracts. The first electric telescopic rod 101 is electrically connected to a first relay. Device 7, the first relay 7 is electrically connected to the second electromagnetic switch 4, the second electromagnetic switch 4 is connected to the power supply 9; the structure of the second locking mechanism 2 is the same as that of the first locking mechanism 1, the second locking mechanism 2 includes a second electric telescopic rod 201, the second electric telescopic rod 201 is fixedly installed on the wall above the rear air door 6, the end of the rod of the second electric telescopic rod 201 is connected to the second pin 202 and the second pin 202 extends vertically toward the rear air door 6, the rear air door 6 is provided with a second insertion hole 203 corresponding to the second pin 102, the second pin 202 is inserted into or disengaged from the second insertion hole 203 as the second electric telescopic rod 201 extends and retracts, the second electric telescopic rod 201 is electrically connected to the second relay 8, the second relay 8 is electrically connected to the first electromagnetic switch 3, the first electromagnetic switch 3 is connected to the power supply 9. The system utilizes an electromagnetic switch to sense the opening and closing status of the dampers, and a relay controls the extension and retraction of an electric telescopic rod. When one damper is open, the electric telescopic rod above the other damper extends to lock that damper, achieving a damper interlock. The electric telescopic rod has an electrode speed of 50-90 mm / s, enabling rapid interlocking. Simultaneously, this damper interlocking device replaces the existing method of connecting dampers with steel wire ropes through iron pipes, avoiding the tension of the steel wire ropes that hinders the closing of the dampers and facilitating complete closure.

[0020] Furthermore, the ends of the first electric telescopic rod 101 or the second electric telescopic rod 102 are connected to the first pin 101 or the second pin 102 via a rope 11. Using the rope 11 for connection can reduce the vibration experienced by the first electric telescopic rod 101 or the second electric telescopic rod 201 during use, thereby reducing the frequency of damage.

[0021] A first pin guide tube 104 is provided on the door frame of the front air door 5 above the first insertion hole 103, and a second pin guide tube 204 is provided on the door frame of the rear air door 6 above the second insertion hole 203. These guide tubes limit and guide the first pin 102 or the second pin 202, which facilitates the smooth entry of the first pin 102 or the second pin 202 into the first insertion hole 103 or the second insertion hole 203.

[0022] Among them, the first electromagnetic switch 3 and the second electromagnetic switch 4 are installed on the side with a larger opening of the front damper 5 or the rear damper 6. They are highly sensitive. Compared with the traditional damper interlocking device, which requires one damper to reach 90 degrees to achieve full interlocking, the interlocking device of this invention can achieve interlocking of the other damper when one damper is only a few centimeters open, ensuring that only one damper is always open.

[0023] The first electromagnetic switch 3 includes an energizing component 301 and a magnet component 302. The energizing component 301 is mounted on the door frame at the top of the front damper 5, and the magnet component 302 is mounted on the front damper 5 corresponding to the energizing component 301. When the damper is closed, the magnet component 302 is connected to the energizing component 301. The second electromagnetic switch 4 has the same structure as the first electromagnetic switch 3. This is prior art and will not be described in detail here.

[0024] The electric telescopic pole used in this embodiment is model LA-T9, with a stretching and pulling force of at least 20N. The relay is HH52P, the electromagnetic switch is a magnetic control switch (normally closed type) model MC-18, the power supply is a backup power supply, and the equipment voltage is 12V.

[0025] Working Principle: When both the front and rear dampers are closed, the normally open contacts of the first and second relays close, and the normally closed contacts open, resulting in a positive current direction on the left and a negative current direction on the right. Both the first and second electric telescopic rods retract, and the first and second latches disengage from their sockets. When one damper is opened, the electromagnetic switch on the current damper disconnects, causing the normally open contact of the relay connected to that switch to open, and the normally closed contact to close, changing the current direction to negative on the left and positive on the right. This causes the electric telescopic rod on the opposite door frame to extend, inserting the corresponding latch into the socket on the door leaf, thus interlocking the dampers. When the damper needs to be closed, the operator releases the damper. Without the resistance of the steel cable, the damper closes automatically under the restoring force of the spring. The electromagnetic switch on the closed damper connects, closing the normally open contacts of the first and second relays, and the normally closed contacts to open, changing the current direction to positive on the left and negative on the right. Both the first and second electric telescopic rods retract, returning to their initial state, ready to open again.

[0026] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.

Claims

1. A mine interlocking air door, comprising a front air door and a rear air door, characterized in that, Both the front and rear dampers are equipped with damper interlocking mechanisms. One end of a spring is fixedly connected to the middle of both the front and rear dampers, and the other end of the spring is fixedly connected to the middle of the door frame on the closed side of the front or rear damper. When the front or rear damper is opened, the spring is stretched. The spring wire diameter is 5-8mm, the outer diameter is 30-35mm, and the length is half of the stroke of the damper when it is opened 90°.

2. The interlocking air door in a mine according to claim 1, characterized in that, The damper interlocking mechanism includes a first locking mechanism, a second locking mechanism, a first electromagnetic switch, and a second electromagnetic switch. The first electromagnetic switch and the second electromagnetic switch are respectively installed on the front damper and the rear damper to sense the opening and closing status of the dampers. The first locking mechanism includes a first electric telescopic rod, which is fixedly installed on the wall above the front damper. The end of the first electric telescopic rod is connected to a first pin, which extends vertically to the front damper. The front damper has a first insertion hole corresponding to the first pin. The first pin is inserted into or disengaged from the first insertion hole as the first electric telescopic rod extends or retracts. The first electric telescopic rod is electrically connected to a first relay, which is electrically connected to a power supply and the second electromagnetic switch. The second locking mechanism has the same structure as the first locking mechanism and is installed on the rear damper. The first electromagnetic switch is electrically connected to the second locking mechanism through the second relay.

3. A mine interlocking airlock according to claim 2, characterized in that, The end of the first or second electric telescopic pole is connected to the first or second pin via a rope.

4. A mine interlocking airlock according to claim 2, characterized in that, The first electromagnetic switch and the second electromagnetic switch are installed on the side of the front or rear damper with a larger opening.

5. A mine interlocking airlock according to claim 2, characterized in that, A first pin guide tube is provided above the first socket on the door frame of the front air door, and a second pin guide tube is provided above the second socket on the door frame of the rear air door.

6. A mine interlocking airlock according to claim 2, characterized in that, The first electromagnetic switch includes an energizing component and a magnet component. The energizing component is installed on the door frame at the top of the front damper, and the magnet component is installed on the front damper in the same way as the energizing component. When the damper is closed, the magnet component is connected to the energizing component. The second electromagnetic switch has the same structure as the first electromagnetic switch.

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