Air door interlocking device

Abstract

The utility model discloses an air door interlocking device which comprises a sliding cavity arranged between two air doors, a sliding groove is formed in the sliding cavity, a fixed clamping plate is arranged in the middle of the sliding groove, the distances between the fixed clamping plate and the air doors on the two sides are the same, and a left sliding block and a right sliding block which are connected with the sliding groove in a sliding mode are arranged on the two sides of the fixed clamping plate respectively. First fixed pulleys corresponding to the left sliding block and the right sliding block are arranged at the top ends of the sides, close to the sliding groove, of the two air doors respectively, the head ends of the left sliding block and the right sliding block are connected through springs, and the tail ends are fixedly connected with steel wire ropes, and the other ends of the steel wire ropes are connected with lug plates of the air doors after bypassing the first fixed pulleys; when the tail end of the left sliding block is located at the left end of the sliding groove, the head end of the right sliding block abuts against the fixed clamping plate, the spring is in the maximum extension state, the left air door is opened, the right air door is closed, when one air door is opened, the other air door is always closed, and the situation that the two air doors are opened at the same time, and consequently a ventilation system is short-circuited is effectively avoided. And the safety and the reliability are higher.

Description

Technical Field

[0001] This utility model belongs to the field of underground safety management technology in coal mines, and specifically relates to an air door interlocking device. Background Technology

[0002] Air doors are important structures in mine ventilation systems. They isolate airflow, create conditions for the on-demand distribution of mine airflow, and facilitate pedestrian and transportation access. In actual production, human error can easily lead to the simultaneous opening of two or more air doors, causing airflow short-circuiting or significant air leakage due to multiple doors opening simultaneously, resulting in ventilation system disorder. Utility Model Content

[0003] The purpose of this invention is to provide a damper interlocking device to prevent the risk of airflow short circuit when two dampers are opened simultaneously.

[0004] The technical solution adopted by this utility model is a damper interlocking device, including a slide groove set between two dampers. A fixed seat is provided in the middle of the slide groove, and the distance from the fixed seat to the two dampers is the same. Limiting bolts are provided on both sides of the fixed seat. A left slider and a right slider are provided on the outside of the limiting bolts and are slidably connected to the slide groove. The top of the two dampers near the slide groove is provided with a first fixed pulley corresponding to the left slider and the right slider respectively. The head ends of the left slider and the right slider are connected by springs, and the end ends are fixedly connected to steel wire ropes. The other end of the steel wire rope passes around the first fixed pulleys and is connected to the ear plate of the damper. When the left damper is opened, the left slider moves to the left, the right slider abuts against the limiting bolt and the spring is in the maximum extension state, and the right damper is closed.

[0005] Furthermore, a limiting rod is rotatably connected to the aforementioned fixed base. The two ends of the limiting rod extend beyond the left or right slider by a set distance and are equipped with triangular limiting plates. When the limiting rod is in a horizontal state, the top of the triangular limiting plate extends 2-3 cm beyond the bottom of the left and right sliders.

[0006] Furthermore, the sliding stroke of the left slider is between the distance between the left triangular limiting plate and the two ends of the left slider, and the sliding stroke of the right slider is between the distance between the right triangular limiting plate and the two ends of the right slider.

[0007] Furthermore, guide rods are provided between the left slider, the right slider, and the first fixed pulley. The guide rods are horizontally positioned, and the wire rope passes through the guide rods and connects to the first fixed pulley.

[0008] Furthermore, the bottom of the two dampers near the slide groove is provided with a second fixed pulley. The left and right sliders are respectively provided with a three-way guide tube between them and the first and second fixed pulleys. The wire rope passes through the three-way guide tube, passes around the first and second fixed pulleys respectively, and is connected to the ear plate of the damper.

[0009] Furthermore, the aforementioned damper sidewall is hinged to the wall, and a torsion spring is provided at the hinge.

[0010] Compared with the prior art, the beneficial effect of this utility model is that by setting an interlocking device between the two air dampers, when the left air damper is opened, the left slider slides to the left, and the right slider tends to move to the left. It is limited by the right limit bolt, and the spring is stretched to its maximum length, keeping the right air damper closed. At the same time, during the left slider's leftward movement, it is pressed down by the triangular limit plate, and the right triangular limit plate is raised, which has a limiting effect on the right slider, ensuring that the right air damper remains closed while the left air damper is open. Similarly, when the right air damper is opened, this device keeps the other air damper closed while one air damper is open, effectively avoiding the situation where both air dampers are opened at the same time, causing a short circuit in the ventilation system, thus improving safety and reliability. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the damper interlocking device.

[0012] Figure 2 This is a diagram showing the state of the left-side damper of the damper interlock device being open.

[0013] Figure 3 This is a schematic diagram of another embodiment of the damper interlocking device. Detailed Implementation

[0014] 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.

[0015] Example 1

[0016] like Figure 1-2As shown, a damper interlocking device includes a slide groove 2 disposed between two dampers 1. A fixed seat 3 is provided in the middle of the slide groove 2, and the distance from the fixed seat 3 to the two dampers 1 is the same. Limiting bolts 4 are provided on both sides of the fixed seat 3. A left slider 5 and a right slider 6 are provided on the outside of the limiting bolts 4 and are slidably connected to the slide groove 3. The top of the two dampers 1 near the slide groove 3 is provided with a first fixed pulley 7 corresponding to the left slider 5 and the right slider 6 respectively. The head ends of the left slider 5 and the right slider 6 are connected by a spring 8. The ends of the left slider 5 and the right slider 6 are fixedly connected to a steel wire rope 9. The other end of the steel wire rope 9 passes around the first fixed pulley 7 and is connected to the ear plate 101 of the damper 1. When the left damper 1 is opened, the steel wire rope 9 pulls the left slider 5 to move to the left, and the right slider tends to move to the left. The right slider 6 is in contact with the limiting bolt 4 on the right side and the spring 8 is in the maximum extension state, and the right damper remains closed. The side wall of damper 1 is hinged to the wall, and a torsion spring is installed at the hinge. After the staff passes through, under the restoring force of the torsion spring and the spring, the damper 1 on the left side slowly closes, and the left slider 5 slides to the right. When the damper 1 on the right side opens, the right slider 6 slides to the right, and the left slider 5 is pulled to the right until the head of the left slider 5 contacts the limit bolt 4 on the left side. At this time, the spring is in the maximum extension state, the damper 1 on the right side opens, and the damper 1 on the left side closes. That is, when one damper 1 is open, the other damper 1 always remains closed, which effectively avoids the situation where the two dampers are opened at the same time, causing a short circuit in the ventilation system, and thus has higher safety and reliability.

[0017] A limiting rod 301 is rotatably connected to the aforementioned fixed base 3. Both ends of the limiting rod 301 extend a predetermined distance from the left slider 5 or right slider 6 and are equipped with triangular limiting plates 302. When the limiting rod 301 is horizontal, the top of the triangular limiting plate 302 extends 2-3 cm beyond the bottom of the left slider 5 and right slider 6. During the leftward movement of the left slider 5, it is pressed down by the triangular limiting plate 302, while the right triangular limiting plate 302 rises, limiting the right slider 6 and ensuring that while the left damper 1 is open, the right damper 1 remains closed. The same principle applies to the rightward movement of the right slider 6.

[0018] The sliding stroke of the left slider 5 is between the distance between the left triangular limiting plate 302 and the two ends of the left slider 5. That is, the stroke is not greater than the distance from the left triangular limiting plate 302 to the right end of the left slider 5 and not less than the distance from the triangular limiting plate 302 to the left end of the left slider 5. The sliding stroke of the right slider 6 is between the distance between the right triangular limiting plate 302 and the two ends of the right slider 6. The stroke is not greater than the distance from the right triangular limiting plate 302 to the left end of the right slider 5 and not less than the distance from the triangular limiting plate 302 to the right end of the right slider 5. This ensures that when the damper is opened and sliding, the left slider 5 or the right slider 6 presses down the triangular limiting plate 302 on that side and raises the triangular limiting plate on the other end to limit the slider.

[0019] To ensure that the left slider 5 and the right slider 6 move horizontally, guide rods 10 are provided between the left slider 5, the right slider 6 and the first fixed pulley 7 respectively. The guide rods 10 are set horizontally, and the steel wire rope 9 passes through the guide rods 10 and is connected to the first fixed pulley 7.

[0020] Example 2

[0021] like Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that the bottom ends of the two dampers 1 near the slide groove 3 are respectively provided with second fixed pulleys 11. The left slider 5 and right slider 6 are respectively provided with three-way guide tubes 12 between them and the first fixed pulley 7 and the second fixed pulley 11. The wire rope 9 passes through the three-way guide tube 12, then around the first fixed pulley 7 and the second fixed pulley 11, and connects to the ear plate 101 of the damper 1. The two wire ropes 9 connecting the first fixed pulley 7 and the second fixed pulley 11 are symmetrical. Using the first fixed pulley 7 and the second fixed pulley 11 arranged vertically to connect the wire ropes 9 to pull the sliders facilitates a balanced distribution of tension, improves the smoothness of slider movement, and reduces the load on the wire ropes near the damper section.

[0022] 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 damper interlock device, characterized by, The utility model provides a kind of double-leaf air door, including the chute (2) being arranged between two air doors (1), the middle part of chute (2) is equipped with fixed seat (3) and the distance of fixed seat (3) to two side air doors (1) is same, fixed seat (3) both sides are equipped with limit bolt (4) respectively, limit bolt (4) outside is equipped with left slider (5) and right slider (6) with the sliding connection of chute (2), the top of one side of two air doors (1) close to chute (2) is equipped with first fixed pulley (7) respectively corresponding left slider (5) and right slider (6), the head end of left slider (5) and right slider (6) is connected by spring (8), terminal fixed connection steel wire rope (9), steel wire rope (9) other end is connected with the lug (101) of air door (1) after passing first fixed pulley (7);When opening left air door (1), left slider (5) left shift, right slider (6) is connected with limit bolt (4) and spring (8) is in maximum elongation state, and the air door (1) of right side is closed.

2. A damper interlock according to claim 1, wherein, The limit rod (301) is rotatably connected on the fixed seat (3), the limit rod (301) extends out of the left slider (5) or the right slider (6) by a set distance and is provided with a triangular limiting plate (302), and the top end of the triangular limiting plate (302) extends out of the bottom end of the left slider (5) and the right slider (6) by 2-3 cm when the limit rod (301) is in a horizontal state.

3. A damper interlock according to claim 2, wherein, The sliding stroke of the left slider (5) is between the distance between the left triangular limiting plate (302) and the two ends of the left slider (5), and the sliding stroke of the right slider (6) is between the distance between the right triangular limiting plate (302) and the two ends of the right slider (6).

4. A damper interlock according to claim 1, wherein, A guide rod (10) is arranged between the left slider (5), the right slider (6) and the first fixed pulley (7) respectively, the guide rod (10) is arranged horizontally, and the steel wire rope (9) is connected with the first fixed pulley (7) after passing through the guide rod (10).

5. A damper interlock according to claim 1, wherein, Second fixed pulleys (11) are arranged at the bottom end of one side of the two air doors (1) close to the chute (2) respectively, three-way guide pipes (12) are arranged between the left slider (5) and the right slider (6) and the first fixed pulley (7) and the second fixed pulley (11) respectively, and the steel wire rope (9) is connected with the lug (101) of the air door (1) after passing through the three-way guide pipe (12) and passing around the first fixed pulley (7) and the second fixed pulley (11) respectively.

6. A damper interlock according to claim 1, wherein, The side wall of the air door (1) is hinged to the wall, and a torsional spring is arranged at the hinge.

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