Subway vehicle rail foreign matter monitoring and alarming device

Abstract

The invention relates to the technical field of track monitoring, and discloses a metro vehicle track foreign matter monitoring and alarming device which comprises a supporting frame and a water storage box, the end, close to a connecting groove, of the supporting frame is fixedly connected with a supporting plate, and a putting hole is formed in the supporting plate. The problem that an existing device cannot automatically mark a large foreign matter is solved through the arranged marking assembly, when a scraping plate encounters the large foreign matter, a connecting plate enables an arc-shaped plate and a rotating plate to synchronously rotate to automatically put a marking lamp panel in a limiting plate, and the convenience of the device can be improved by automatically marking the large foreign matter; through the arranged cleaning assembly, the problem that an existing device cannot automatically clean greasy dirt and grease on the rail is solved, and the spraying box arranged on the supporting frame automatically sprays and pre-softens the rail in the running process of the device; and grease and greasy dirt on the rail are automatically scraped off through the scraping plate, so that the braking performance and the traction performance of the train can be improved, and the reliability of equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of track monitoring, and in particular to a foreign body monitoring and alarm device for subway vehicle tracks. Background Art

[0002] By real-time monitoring of the track area, foreign objects on the track, such as fallen objects, intruding obstacles, etc., can be discovered in time, and an alarm can be issued before the train approaches, reminding the driver to take emergency braking or other risk avoidance measures to avoid collision between the train and foreign objects, thereby preventing serious accidents such as derailment and overturning, and ensuring the safety of the lives of passengers and staff.

[0003] Most of the existing track foreign object monitoring and alarm devices only have the function of processing and monitoring alarm for smaller foreign objects. When encountering larger foreign objects that need to be handled manually by operators, the existing devices do not automatically mark the detected foreign objects. When cleaning, the operators are required to search for the detected foreign objects along the track again, which reduces the convenience of the device. There are usually oil, grease, dust and other stains on the track. The track surface is rougher after cleaning, which can improve the braking and traction performance of the train. However, the existing devices only have the function of cleaning solid foreign objects on the track, and do not have the function of cleaning oil and grease, which reduces the reliability of the equipment. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a subway vehicle track foreign body monitoring and alarm device, which solves the existing problems of low convenience and low reliability.

[0005] (II) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: A subway vehicle track foreign body monitoring and alarm device, including a support frame and a water storage box: The marking assembly comprises a connecting groove provided on the support frame, a support plate is fixedly connected to one end of the support frame close to the connecting groove, a delivery hole is provided on the support plate, a plurality of limit plates are evenly fixedly connected in the delivery hole, a rotating shaft is rotatably connected to the support plate near the four corners, an arc-shaped plate is fixedly connected to one end of the rotating shaft away from the support plate, a rotating plate is fixedly connected to the outer wall of the rotating shaft, and a connecting plate is rotatably connected between every two rotating plates; The cleaning component comprises two sliding grooves symmetrically arranged in the support frame, wherein a slider is slidably connected in the sliding groove, and a toggle rod is fixedly connected to one end of the slider away from the sliding groove.

[0006] Preferably, a compression spring is fixedly connected in the sliding groove, and the compression spring is fixedly connected to one end of the sliding block close to the compression spring.

[0007] Preferably, a rotating rod is rotatably connected between the two sliding grooves, and a scraper is fixedly connected to the outer wall of the rotating rod.

[0008] Preferably, a push plate is fixedly connected to one end of one of the connecting plates close to the connecting groove, and the push plate is adapted to the toggle rod.

[0009] Preferably, a water storage box is fixedly connected to the upper surface of the support frame, a water pipe is fixedly connected to the upper portion of the water storage box, two spray boxes are symmetrically installed at one end of the support frame close to the scraper, and the two spray boxes are fixedly connected to the support frame, and the water storage box and the spray box are connected by a water pipe.

[0010] Preferably, two guide rods are symmetrically mounted on the support frame, and the two guide rods are slidably connected to the support frame, one end of the guide rod close to the water storage box is fixedly connected to a wheel seat, and a guide wheel is rotatably connected inside the wheel seat.

[0011] Preferably, a shaft is rotatably connected inside the support frame, a roller is fixedly connected to the outer wall of the shaft, an arc-shaped pressure plate is fixedly connected to one end of the support frame away from the water storage box, and the arc-shaped pressure plate is adapted to the scraper.

[0012] Preferably, the support frame is fixedly connected to a cylinder at one end away from the connecting groove, a piston plate is slidably connected in the cylinder, the shaft rod is fixedly connected to an articulated plate 1 at one end close to the cylinder, the articulated plate 1 is rotatably connected to an articulated plate 2 at one end away from the shaft rod, and the articulated plate 2 is rotatably connected to the piston plate.

[0013] Preferably, an air inlet hole is opened at one end of the cylinder away from the shaft rod, a stand is fixedly connected inside the cylinder, a light rod is slidably connected to the stand, and a blocking block is fixedly connected to one end of the light rod close to the air inlet hole.

[0014] Preferably, an air pipe is fixedly connected inside the cylinder, and the cylinder is connected to the water storage box through the air pipe.

[0015] In summary, the technical effects and advantages of the present invention are as follows: In the present invention, the problem that the existing device cannot automatically mark larger foreign objects is solved by setting a marking component. When the scraper encounters a larger foreign object, the connecting plate causes the arc plate and the rotating plate to rotate synchronously to automatically drop the marking light plate in the limit plate. The convenience of the device can be improved by automatically marking larger foreign objects. The problem that the existing device cannot automatically clean oil and grease on the track is solved by setting a cleaning component. The spray box set on the support frame automatically sprays the track to pre-soften it during the operation of the device, and the scraper automatically scrapes off the grease and oil stains on the track, which can improve the braking and traction of the train and improve the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a subway vehicle track foreign body monitoring and alarm device of the present invention; Figure 2 This is a schematic structural diagram of a support frame of a foreign body monitoring and alarm device for a subway vehicle track according to the present invention; Figure 3 It is a schematic cross-sectional view of the support frame of a foreign body monitoring and alarm device for a subway vehicle track according to the present invention; Figure 4 It is a schematic structural diagram of a limit plate of a foreign body monitoring and alarm device for a subway vehicle track according to the present invention; Figure 5 This is a structural schematic diagram of a support plate of a foreign body monitoring and alarm device for a subway vehicle track according to the present invention; Figure 6 It is a cross-sectional structural diagram of a cylinder of a foreign body monitoring and alarm device for a subway vehicle track according to the present invention; Figure 7 A subway vehicle track foreign body monitoring and alarm device according to the present invention Figure 6 A schematic diagram of the enlarged structure.

[0017] In the figure: 1. support frame; 2. water storage box; 3. water pipe; 4. scraper; 5. spray box; 6. support plate; 7. shaft rod; 8. cylinder; 9. air pipe; 10. hinge plate one; 11. arc pressure plate; 12. toggle rod; 13. sliding groove; 14. guide rod; 15. slider; 16. compression spring; 17. roller; 18. connecting groove; 19. wheel seat; 20. guide wheel; 21. limit plate; 22. push plate; 23. arc plate; 24. connecting plate; 25. rotating plate; 26. delivery hole; 27. rotating shaft; 28. hinge plate two; 29. ​​piston plate; 30. stand; 31. air inlet hole; 32. light rod; 33. blocking block; 34. rotating rod. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] refer to Figures 1 - 7, a subway vehicle track foreign body monitoring and alarm device shown in the figure includes a support frame 1 and a water storage box 2, a cleaning component, including two sliding grooves 13 symmetrically opened in the support frame 1, a slider 15 is slidably connected in the sliding groove 13, and the end of the slider 15 away from the sliding groove 13 is fixedly connected to the toggle rod 12, a compression spring 16 is fixedly connected in the sliding groove 13, and the compression spring 16 is fixedly connected to the end of the slider 15 close to the compression spring 16, a rotating rod 34 is rotatably connected between the two sliding grooves 13, and a scraper 4 is fixedly connected to the outer wall of the rotating rod 34, a water storage box 2 is fixedly connected to the upper surface of the support frame 1, and a water pipe 3 is fixedly connected to the upper part of the water storage box 2, two spray boxes 5 are symmetrically installed at one end of the support frame 1 close to the scraper 4, and the two spray boxes 5 are fixedly connected to the support frame 1, and the water storage box 2 and the spray box 5 are connected through the water pipe 3, the support frame 1 An axle rod 7 is rotatably connected inside, and a roller 17 is fixedly connected to the outer wall of the axle rod 7. An arc-shaped pressure plate 11 is fixedly connected to the end of the support frame 1 away from the water storage box 2, and the arc-shaped pressure plate 11 is adapted to the scraper 4. An end of the support frame 1 away from the connecting groove 18 is fixedly connected to a cylinder 8, and a piston plate 29 is slidably connected inside the cylinder 8. An end of the axle rod 7 close to the cylinder 8 is fixedly connected to a hinged plate 10, and an end of the hinged plate 10 away from the axle rod 7 is rotatably connected to a hinged plate 28, and the hinged plate 28 is rotatably connected to the piston plate 29. An air inlet 31 is provided at one end of the cylinder 8 away from the axle rod 7. A stand 30 is fixedly connected inside the cylinder 8, and a light rod 32 is slidably connected to the stand 30. A blocking block 33 is fixedly connected to the end of the light rod 32 close to the air inlet 31. An air pipe 9 is fixedly connected inside the cylinder 8, and the cylinder 8 and the water storage box 2 are connected via the air pipe 9.

[0020] In order to improve the reliability of the device, the present invention is provided with a cleaning component, and the roller 17 rotates on the track to make the shaft 7 rotate synchronously, and the shaft 7 drives the rotation of the hinged plate 10 to make the piston plate 29 slide in the cylinder 8 to make the cylinder 8 vent gas, and the gas is passed into the water storage box 2 through the air pipe 9. The water storage box 2 sprays the detergent in the water storage box 2 through the water pipe 3 and the spray box 5 onto the track to soften the oil and grease on the track, and scrapes it off the track through the scraper 4.

[0021] Specifically, first, when the device is running on the track, through the roller 17 and the two guide wheels 20 symmetrically arranged under the track, the device runs more stably. The rotation of the roller 17 drives the shaft rod 7 to rotate synchronously. The shaft rod 7 drives the first articulated plate 10 to rotate. Through the rotation of the first articulated plate 10, the second articulated plate 28 and the piston plate 29 move in the cylinder 8. When the piston plate 29 moves downward to generate gas, at this time, the light rod 32 is extruded by the spring sleeved on it, so that the plug 33 blocks the air inlet hole 31, and the cylinder 8 is in the state of discharging gas. At this time, the gas is discharged into the water storage box 2 through the air pipe 9. At this time, the one-way valve in the air pipe 9 is in the open state. The pressure in the water storage box 2 gradually increases with the introduction of gas. At this time, the cleaner in the water storage box 2 is discharged into the spray box 5 through the water pipe 3 to spray the track, softening the oil stains and grease on the track. As the device runs, the arc-shaped pressing plate 11 makes the scraper 4 close to the track to scrape the oil stains and grease softened by spraying. It should be noted that the piston plate 29 does not contact the vertical frame 30 even when it moves to the lowest position. The water storage box 2 is in a sealed state during the cleaning process, and the solubility of the cleaning agent and the gas in the water storage box 2 is extremely low, which will not affect the discharge of the cleaning agent.

[0022] Secondly, when the first articulated plate 10 moves the second articulated plate 28 and the piston plate 29 upward along the inner wall of the cylinder 8, at this time, the cylinder 8 is in the air intake state. At this time, the plug 33 on the light rod 32 compresses the spring sleeved on it and moves upward, so that the air inlet hole 31 is in the open state. The cylinder 8 intakes air through the air inlet hole 31. At this time, the one-way valve in the air pipe 9 is in the closed state, and the cleaning agent in the water storage box 2 will not flow back into the cylinder 8. At this time, since there is no gas introduced into the water storage box 2, the pressure in the water storage box 2 gradually decreases, and the cleaning agent discharged into the spray box 5 through the water pipe 3 decreases accordingly. At this time, the previously discharged and stored cleaning agent in the spray box 5 continues to spray the track. When the shaft rod 7 rotates to the air outlet state of the cylinder 8, the water storage box 2 repeats the above scheme again to supplement the cleaning agent to the spray box 5 to spray the track. It should be noted that the time interval between the exhaust and intake of the cylinder 8 is shorter than the spraying time of the cleaning agent in the spray box 5, which will not affect the spraying of the track.

[0023] Reference Figures 1 - 7, marking component, including a connecting groove 18 opened on the support frame 1, one end of the support frame 1 close to the connecting groove 18 is fixedly connected to a support plate 6, a delivery hole 26 is opened on the support plate 6, and a plurality of limit plates 21 are evenly fixedly connected in the delivery hole 26, the support plate 6 is rotatably connected with a rotating shaft 27 near the four corners, and the end of the rotating shaft 27 away from the support plate 6 is fixedly connected with an arc plate 23, and the outer wall of the rotating shaft 27 is fixedly connected with a rotating plate 25, and a connecting plate 24 is rotatably connected between every two rotating plates 25; two guide rods 14 are symmetrically installed on the support frame 1, and the two guide rods 14 are slidably connected to the support frame 1, and the end of the guide rod 14 close to the water storage box 2 is fixedly connected to a wheel seat 19, and a guide wheel 20 is rotatably connected in the wheel seat 19, and one end of one connecting plate 24 close to the connecting groove 18 is fixedly connected to a push plate 22, and the push plate 22 is adapted to the toggle rod 12.

[0024] In order to improve the convenience of the device, the present invention sets a marking component. When the scraper 4 encounters a large foreign object, it is squeezed and the movement in the sliding groove 13 drives the toggle rod 12 to move synchronously. When the toggle rod 12 and the push plate 22 move, the push plate 22 pushes the multiple arc plates 23 and the rotating plate 25 to rotate synchronously. At this time, the marking light board on the rotating plate 25 is automatically released through the release hole 26 for automatic marking.

[0025] Specifically, first, when the scraper 4 is removing smaller foreign matter on the track, the compression spring 16 in the sliding groove 13 will squeeze the slider 15 to prevent the rotating rod 34 from moving along the sliding groove 13. When the scraper 4 is removing larger foreign matter on the track, the squeezing force on the scraper 4 becomes larger, and the rotating rod 34 will move along the sliding groove 13. At this time, the slider 15 and the toggle rod 12 move synchronously, and the compression spring 16 is in a compressed state. When the toggle rod 12 squeezes the push plate 22, the push plate 22 pushes the connecting plate 24, and the connecting plate 24 pushes the multiple arc plates 23 and the rotating plate 25 to rotate synchronously. When the rotating plate 25 moves outward along the delivery hole 26, the rotating plate 25 is rotated synchronously. The marking light board placed on the movable plate 25 is automatically discharged through the delivery hole 26 to mark larger foreign objects. At the same time, the arc plate 23 rotates to the top of the delivery hole 26 to limit the marking light board in the limit plate 21 to prevent it from falling. It is worth noting that the arc plate 23 and the rotating plate 25 are staggered, and the arc plate 23 is located above the rotating plate 25. The spacing between the arc plate 23 and the rotating plate 25 is the same as the thickness of the marking light board. The marking light board automatically lights up to mark larger foreign objects, which is convenient for maintenance personnel to quickly find and deal with them in the dark subway tunnel. When a larger foreign object is found, the controller on the device will simultaneously issue an alarm to remind the staff.

[0026] Secondly, when the scraper 4 pushes a larger foreign object on the track off the track, the scraper 4 pushes the slider 15 and the rotating rod 34 back to their original positions under the rebound force of the compression spring 16. When the toggle rod 12 is out of contact with the push plate 22, the push plate 22 is restored to its original position under the rebound of the spring arranged on one side. During the recovery of the push plate 22, the arc plate 23 gradually rotates away from the top of the delivery hole 26 as the connecting plate 24 rotates, and the rotating plate 25 rotates to the top of the delivery hole 26. Since the arc plate 23 and the rotating plate 25 are cross-arranged, the marking light board in the limit plate 21 falls onto the rotating plate 25 as the arc plate 23 rotates, preparing for the next marking.

[0027] Working principle of the present invention: through the roller 17 and the two guide wheels 20 symmetrically arranged under the track, the device is more stable during operation, the rotation of the roller 17 drives the shaft rod 7 to rotate synchronously, the shaft rod 7 drives the hinge plate 10 to rotate, and the rotation of the hinge plate 10 drives the hinge plate 2 28 and the piston plate 29 to move in the cylinder 8. When the piston plate 29 moves downward to generate gas, the light rod 32 is squeezed by the spring sleeved thereon so that the block 33 blocks the air inlet 31, so that the cylinder 8 is in a state of exhausting gas. At this time, the gas is discharged into the water storage box 2 through the air pipe 9. At this time, the one-way valve in the air pipe 9 is in an open state, and the pressure in the water storage box 2 gradually increases with the introduction of gas. At this time, the detergent in the water storage box 2 is discharged into the spray box 5 through the water pipe 3. The track is sprayed to soften the oil and grease on the track. As the device runs, the arc pressure plate 11 makes the scraper 4 close to the track to scrape off the softened oil and grease after spraying. When the hinged plate 10 moves the hinged plate 28 and the piston plate 29 upward along the inner wall of the cylinder 8, the cylinder 8 is in an intake state. At this time, the block 33 on the light rod 32 compresses the spring sleeved thereon to move upward, so that the air inlet 31 is in an open state, and the cylinder 8 takes in air through the air inlet 31. At this time, the one-way valve in the air pipe 9 is in a closed state, and the detergent in the water storage box 2 will not flow back into the cylinder 8. At this time, the water storage box 2 has no gas passing into the water storage box 2. The pressure in the water storage box 2 gradually decreases, and the detergent discharged from the water pipe 3 into the spray box 5 decreases accordingly. At this time, the The stored detergent continues to spray the track. When the shaft rod 7 rotates to the air outlet state of the cylinder 8, the water storage box 2 continues to repeat the above scheme to replenish the detergent to the spray box 5 to spray the track again. When the scraper 4 is removing smaller foreign objects on the track, the compression spring 16 in the sliding groove 13 will squeeze the slider 15 to prevent the rotating rod 34 from moving along the sliding groove 13. When the scraper 4 removes larger foreign objects on the track, the extrusion force on the scraper 4 becomes larger. At this time, the rotating rod 34 will move along the sliding groove 13. At this time, the slider 15 and the toggle rod 12 move synchronously, and the compression spring 16 is in a compressed state. When the toggle rod 12 squeezes the push plate 22, the push plate 22 pushes the connecting plate 24, and the connecting plate 24 pushes multiple arc plates 23 and the rotating plate 25 to rotate synchronously. When the rotating plate 25 moves outward along the delivery hole 26, the marking light board placed on the rotating plate 25 is automatically discharged through the delivery hole 26 to mark the larger foreign matter, and at the same time, the arc plate 23 rotates to the top of the delivery hole 26 to limit the marking light board in the limit plate 21 to prevent it from falling. When the scraper 4 pushes the larger foreign matter on the track off the track, the scraper 4 pushes the slider 15 and the rotating rod 34 back to their original positions under the rebound force of the compression spring 16. When the toggle rod 12 is out of contact with the push plate 22, the push plate 22 is restored to its original position under the rebound of the spring set on one side. During the recovery process of the push plate 22, the arc plate 23 gradually rotates away from the top of the delivery hole 26 as the connecting plate 24 rotates, and at the same time, the rotating plate 25 rotates to the top of the delivery hole 26.Since the arc-shaped plate 23 and the rotating plate 25 are arranged crosswise, at this time, the marker lamp plate in the limiting plate 21 falls onto the rotating plate 25 as the arc-shaped plate 23 rotates.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A subway vehicle track foreign body monitoring and alarm device, comprising a support frame (1) and a water storage box (2), characterized in that: The marking assembly comprises a connecting groove (18) formed on a support frame (1), a support plate (6) being fixedly connected to one end of the support frame (1) close to the connecting groove (18), a delivery hole (26) being formed on the support plate (6), a plurality of limit plates (21) being evenly fixedly connected in the delivery hole (26), a rotating shaft (27) being rotatably connected to the support plate (6) at positions close to four corners, an arc-shaped plate (23) being fixedly connected to one end of the rotating shaft (27) away from the support plate (6), a rotating plate (25) being fixedly connected to the outer wall of the rotating shaft (27), and a connecting plate (24) being rotatably connected between every two rotating plates (25); The cleaning component comprises two sliding grooves (13) symmetrically arranged in a support frame (1), wherein a sliding block (15) is slidably connected in the sliding groove (13), and an end of the sliding block (15) away from the sliding groove (13) is fixedly connected to a toggle rod (12).

2. The subway vehicle track foreign object monitoring and alarm device according to claim 1, characterized in that: A compression spring (16) is fixedly connected in the sliding groove (13), and the compression spring (16) is fixedly connected to an end of the sliding block (15) close to the compression spring (16).

3. The subway vehicle track foreign object monitoring and alarm device according to claim 1, characterized in that: A rotating rod (34) is rotatably connected between the two sliding grooves (13), and a scraper (4) is fixedly connected to the outer wall of the rotating rod (34).

4. A subway vehicle track foreign object monitoring and alarm device according to claim 1, characterized in that: A push plate (22) is fixedly connected to one end of one of the connecting plates (24) close to the connecting groove (18), and the push plate (22) is adapted to fit the toggle rod (12).

5. The subway vehicle track foreign object monitoring and alarm device according to claim 1, characterized in that: A water storage box (2) is fixedly connected to the upper surface of the support frame (1), and a water pipe (3) is fixedly connected to the upper portion of the water storage box (2). Two spray boxes (5) are symmetrically mounted on one end of the support frame (1) close to the scraper (4), and the two spray boxes (5) are fixedly connected to the support frame (1), and the water storage box (2) and the spray box (5) are connected via a water pipe (3).

6. The subway vehicle track foreign object monitoring and alarm device according to claim 1, characterized in that: Two guide rods (14) are symmetrically mounted on the support frame (1), and the two guide rods (14) are slidably connected to the support frame (1), one end of the guide rod (14) close to the water storage box (2) is fixedly connected to a wheel seat (19), and a guide wheel (20) is rotatably connected inside the wheel seat (19).

7. The subway vehicle track foreign object monitoring and alarm device according to claim 1, characterized in that: A shaft (7) is rotatably connected inside the support frame (1), a roller (17) is fixedly connected to the outer wall of the shaft (7), and an arc-shaped pressing plate (11) is fixedly connected to one end of the support frame (1) away from the water storage box (2), and the arc-shaped pressing plate (11) is adapted to fit the scraper (4).

8. The subway vehicle track foreign object monitoring and alarm device according to claim 7, characterized in that: The end of the support frame (1) away from the connecting groove (18) is fixedly connected to the cylinder (8), and a piston plate (29) is slidably connected inside the cylinder (8). The end of the shaft rod (7) close to the cylinder (8) is fixedly connected to the hinge plate 1 (10), and the end of the hinge plate 1 (10) away from the shaft rod (7) is rotatably connected to the hinge plate 2 (28), and the hinge plate 2 (28) is rotatably connected to the piston plate (29).

9. The subway vehicle track foreign object monitoring and alarm device according to claim 8, characterized in that: One end of the cylinder (8) away from the shaft rod (7) is provided with an air inlet hole (31). A vertical frame (30) is fixedly connected inside the cylinder (8). A polished rod (32) is slidably connected to the vertical frame (30). One end of the polished rod (32) close to the air inlet hole (31) is fixedly connected with a blocking block (33).

10. A subway vehicle track foreign object monitoring and alarm device according to claim 8, characterized in that: A trachea (9) is fixedly connected inside the cylinder (8). The cylinder (8) is connected to the water storage box (2) through the trachea (9).

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