FOD runway foreign object detection equipment anti-falling device

Abstract

The utility model relates to the technical field of detection equipment, in particular to an anti-falling device of foreign object detection equipment for an FOD runway. The device can buffer instant impact force, the instant stress limit value of the mooring rope is reduced, the occurrence rate of breakage accidents at the connecting position of the mooring rope is reduced, and the device is safer and more reliable. Comprising a supporting mechanism, a detection module and an anti-falling buffer mechanism, the supporting mechanism comprises a mounting chassis, an easy-to-break rod and a supporting rod, the easy-to-break rod and the supporting rod are both of a hollow structure, the easy-to-break rod is provided with an easy-to-break point, the lower end of the easy-to-break rod is connected with the mounting chassis, the upper end of the easy-to-break rod is connected with the lower end of the supporting rod, and the upper end of the supporting rod is fixed to the detection module; the anti-falling buffer mechanism comprises a mounting plate fixedly connected with the mounting chassis, a universal ball fixedly mounted on the mounting plate, a universal seat rotationally connected with the universal ball, a plurality of retaining ropes and a plurality of connecting springs, the retaining ropes are uniformly distributed in the circumferential direction of the universal seat, and one end of each retaining rope is fixedly connected with the edge of the universal seat.

Description

Technical Field

[0001] This utility model relates to the technical field of detection equipment, and in particular to an anti-detachment device for FOD (Foreign Object Detection) runway foreign object detection equipment. Background Technology

[0002] As is well known, FOD (Foreign Object Debris) refers to foreign matter, debris, or objects that may damage aircraft. The hazards posed by FOD are very serious. Foreign objects on airport pavements can easily be sucked into engines, causing engine failure. Debris can also accumulate in mechanical devices, affecting the normal operation of landing gear, wings, and other equipment. Therefore, radar and photoelectric detection equipment are often used to detect FOD. The "Technical Requirements for Foreign Object Detection Equipment on Airport Pavements" (AC-137-CA-2024-01) and the "Regulations on the Management of Special Equipment for Civil Airports" (CCAR-137CA) stipulate that FOD detection equipment must be designed to be easily broken, that is, it should be able to break quickly upon impact with an aircraft to avoid excessive damage to the aircraft. However, broken FOD detection equipment poses a safety hazard of rolling onto the runway.

[0003] To address this, Chinese invention patent CN112904452A discloses a built-in anti-fall-off structure for a side-lamp type FOD detection device, including a support mechanism and a detection module installed on the support mechanism. The support mechanism includes a mounting base, a flexible rod, a support rod, and a pull rope. By setting the pull rope, when the device is subjected to sudden force and breaks at the flexible point, the detection module will not move around after falling because it is connected to the mounting base through the pull rope passing through the inside of the device, thus improving the operational safety of airport runways.

[0004] However, during the implementation of this device, the following defects were found: the instantaneous impact force of the aircraft on the FOD detection equipment is large, the weak connection points between the cable and the mounting chassis and the detection module are prone to breakage, and the FOD detection equipment still has a relatively high probability of falling off and landing on the runway, which requires further improvement. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a safer and more reliable anti-detachment device for foreign object detection equipment on runways, which buffers instantaneous impact forces, reduces the instantaneous stress limit at the tether rope, and lowers the incidence of tether rope breakage accidents.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a device for preventing the fall off of a foreign object detection (FOD) device for runways, comprising a support mechanism and a detection module mounted on the support mechanism. The support mechanism includes a mounting base, a flexible rod, and a support rod. Both the flexible rod and the support rod are hollow structures. The flexible rod has a flexible point. The lower end of the flexible rod is connected to the mounting base, and the upper end of the flexible rod is connected to the lower end of the support rod. The upper end of the support rod is fixed to the detection module. The device also includes an anti-fall-off buffer mechanism, comprising a mounting plate fixedly connected to the mounting base, a universal ball fixedly mounted on the mounting plate, a universal seat rotatably connected to the universal ball, and multiple tethering ropes. The multiple tethering ropes are evenly distributed around the universal seat, with one end fixedly connected to the edge of the universal seat and the other end fixedly connected to the bottom of the detection module.

[0009] As a preferred embodiment, the anti-fall-off buffer mechanism further includes multiple connecting springs, which are evenly distributed around the universal joint in the circumference of the universal joint. One end of each connecting spring is hinged to the bottom of the universal joint, and the other end of each connecting spring is hinged to the top of the mounting plate.

[0010] As a preferred embodiment, a semi-annular protrusion is provided on the inner wall of the flexible rod near the flexible point; furthermore, the semi-annular protrusion is interference-fitted into the flexible rod or welded into the flexible rod.

[0011] As a preferred embodiment, the universal joint includes a base body and a cylindrical body detachably connected to the base body. Both the base body and the cylindrical body are provided with spherical cavities that fit with the outer wall of the universal ball. The universal ball is detachably mounted on a mounting plate. Furthermore, the universal ball is threadedly connected to the mounting plate or detachably connected by bolts. The cylindrical body is threadedly connected to the universal joint. The universal ball is rotatably mounted in the spherical cavity.

[0012] As a preferred embodiment, both the base and the universal ball are provided with through holes that are interconnected vertically.

[0013] As a preferred embodiment, there are at least four tethering ropes and at least four connecting springs, with one tethering rope and one connecting spring arranged in pairs on the upper and lower sides of the universal joint.

[0014] As a preferred embodiment, the mounting chassis is provided with at least four circumferentially distributed reserved holes; furthermore, the top of the tether rope passes through the reserved holes and is connected to the bottom of the detection module off-center; when no tether rope passes through the reserved holes, they are sealed with bolts or sealing plugs.

[0015] As a preferred embodiment, the tether rope is a rigid steel wire rope with a flexibility allowance; furthermore, the length of the tether rope should be 2-6 cm longer than the straight-line distance between the top of the universal joint and the bottom of the detection module.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides an anti-fall-off device for FOD (Foreign Object Detection) runway equipment, which has the following beneficial effects: When the detection module is impacted, the easy-break rod breaks at the easy-break point, and the detection module bends downward in the direction of the impact force. At this time, the tether rope on the side of the impact force source direction quickly tightens and pulls the universal joint to rotate. The tether rope on the side of the impact force source direction mainly bears the tension, while the connecting spring on the same side is in a stretched state. The connecting spring buffers the instantaneous impact force. Subsequently, multiple tether ropes tighten and disperse the impact force. Even if the tether rope on the side of the impact force source direction breaks, the tether rope on the opposite side of the impact force source direction can still play a pulling role, reducing the impact force limit value that a single tether rope can bear, reducing the incidence of tether rope connection breakage events, making it safer and more reliable, and effectively reducing the accident rate of FOD detection equipment falling onto the runway due to impact. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the front planar structure of this utility model;

[0020] Figure 3 This is the utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0021] Figure 4 This is a three-dimensional structural diagram of the anti-drop buffer mechanism of this utility model;

[0022] The following are labels in the attached diagram: 1. Detection module; 2. Mounting chassis; 3. Flexible rod; 4. Support rod; 5. Flexible point; 6. Mounting plate; 7. Universal ball; 8. Tie rope; 9. Connecting spring; 10. Semi-annular protrusion ring; 11. Base; 12. Cylinder; 13. Spherical cavity; 14. Through hole; 15. Reserved hole. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] As described in the background art, a side-lamp type FOD detection device has a built-in anti-detachment structure; the instantaneous impact force of an aircraft on the FOD detection device is large, and the weak connection points between the tether rope and the mounting chassis and the detection module are prone to breakage. The FOD detection device still has a relatively high probability of detaching and falling onto the runway, which needs further improvement.

[0025] To solve this technical problem, this utility model provides a device to prevent the FOD (Foreign Object Detection) device from falling off, which is used to prevent the FOD detection device from falling off.

[0026] For details, please refer to Figure 1-4 The FOD runway foreign object detection equipment anti-detachment device specifically includes: a support mechanism and a detection module 1 installed on the support mechanism. The support mechanism includes a mounting base 2, a flexible rod 3, and a support rod 4. Both the flexible rod 3 and the support rod 4 are hollow structures. The flexible rod 3 has a flexible point 5. The lower end of the flexible rod 3 is connected to the mounting base 2, and the upper end of the flexible rod 3 is connected to the lower end of the support rod 4. The upper end of the support rod 4 is fixed to the detection module 1. It also includes an anti-detachment buffer mechanism, which includes components connected to the mounting base 2. The mounting plate 6 is fixedly connected to the disk 2, the universal ball 7 is fixedly installed on the mounting plate 6, the universal seat is rotatably connected to the universal ball 7, multiple tethering ropes 8 and multiple connecting springs 9 are provided. The multiple tethering ropes 8 are evenly distributed around the circumference of the universal seat. One end of the multiple tethering ropes 8 is fixedly connected to the edge of the universal seat, and the other end of the multiple tethering ropes 8 is fixedly connected to the bottom of the detection module 1. The multiple connecting springs 9 are evenly distributed around the circumference of the universal seat. One end of the multiple connecting springs 9 is hinged to the bottom of the universal seat, and the other end of the multiple connecting springs 9 is hinged to the top of the mounting plate 6.

[0027] The FOD (Foreign Object Detection) device for runways provided by this utility model provides a buffer against instantaneous impact force, reduces the instantaneous stress limit at the tether rope 8, and reduces the incidence of breakage accidents at the connection of the tether rope 8. It is safer and more reliable, and can effectively reduce the accident rate of FOD detection equipment falling onto the runway due to impact.

[0028] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] Example 1

[0031] Please refer to Figure 1-4It includes: a support mechanism and a detection module 1 mounted on the support mechanism. The support mechanism includes a mounting base 2, a flexible rod 3, and a support rod 4. Both the flexible rod 3 and the support rod 4 are hollow structures. The flexible rod 3 has a flexible point 5. The lower end of the flexible rod 3 is connected to the mounting base 2, and the upper end of the flexible rod 3 is connected to the lower end of the support rod 4. The upper end of the support rod 4 is fixed to the detection module 1. It also includes an anti-fall-off buffer mechanism, which includes a mounting module fixedly connected to the mounting base 2. The system includes a plate 6, a ball joint 7 fixedly mounted on the mounting plate 6, a universal seat rotatably connected to the ball joint 7, multiple tethering ropes 8, and multiple connecting springs 9. The multiple tethering ropes 8 are evenly distributed around the circumference of the universal seat, with one end of each tethering rope 8 fixedly connected to the edge of the universal seat and the other end of each tethering rope 8 fixedly connected to the bottom of the detection module 1. The multiple connecting springs 9 are evenly distributed around the circumference of the universal seat, with one end of each connecting spring 9 hinged to the bottom of the universal seat and the other end of each connecting spring 9 hinged to the top of the mounting plate 6.

[0032] For details, please refer to Figure 3 A semi-annular protrusion 10 is provided on the inner wall of the easy-break rod 3 near the easy-break point 5; furthermore, the semi-annular protrusion 10 is interference-fitted into the easy-break rod 3 or welded into the easy-break rod 3; the cut plane at the easy-break point 5 is tangent to the top of the semi-annular protrusion 10.

[0033] The universal joint includes a base 11 and a cylindrical body 12 detachably connected to the base 11. Both the base 11 and the cylindrical body 12 are provided with a spherical cavity 13 that fits into the outer wall of the universal ball 7. The universal ball 7 is detachably installed on the mounting plate 6. Furthermore, the universal ball 7 is threaded to the mounting plate 6 or detachably connected by bolts. The cylindrical body 12 is threaded to the base 11. The universal ball 7 is rotatably installed in the spherical cavity 13.

[0034] Both the base 11 and the universal ball 7 are provided with through holes 14 that are interconnected vertically.

[0035] The tether rope 8 is made of rigid steel wire rope and has a flexibility allowance; furthermore, the length of the tether rope 8 should be 2-4 cm longer than the straight-line distance between the top of the universal joint and the bottom of the detection module 1.

[0036] The FOD runway foreign object detection equipment anti-detachment device provided in this embodiment has a broken easy rod 3. After the easy rod 3 breaks at the easy point 5, the thickness at the easy point 5 is small, and the break is like a knife edge. When the tether rope 8 is subjected to instantaneous impact force, it is easy to be cut when it comes into contact with the break. However, the semi-circular protrusion ring 10 makes smooth contact with the tether rope 8 without affecting the break of the easy point 5, thereby increasing the contact area between the tether rope 8 and the broken point of the easy rod 3, thereby reducing the accident rate of the tether rope 8 being cut, and further improving the anti-detachment effect of the detection module 1.

[0037] The base 11 and cylinder 12 are detachable, which improves the ease of assembly of the universal base and the universal ball 7. Operators can disassemble the universal base and apply lubricating oil to the universal ball 7 to ensure the free rotation of the universal base and improve the convenience of subsequent inspection and maintenance.

[0038] The through hole 14 allows cables to pass through, enabling the cables on the detection module 1 to extend underground through the through hole 14, while preventing the cables from interfering with the rotation of the universal joint.

[0039] The stretch allowance of the tether rope 8 allows for some release buffer time and bending allowance, preventing the tether rope 8 from being overly taut and affecting the breakage of the easy breakage point 5.

[0040] Example 2

[0041] The anti-detachment device for the FOD runway foreign object detection equipment provided in Example 1 has been further optimized, specifically, as follows: Figure 4 As shown, there are at least four tether ropes 8 and at least four connecting springs 9. A pair of tether ropes 8 and a pair of connecting springs 9 are arranged on the upper and lower sides of the universal joint.

[0042] The mounting chassis 2 is provided with at least four circumferentially distributed reserved holes 15; furthermore, the top of the tether rope 8 passes through the reserved hole 15 and is connected to the bottom of the detection module 1 off-center; when no tether rope 8 passes through the reserved hole 15, it is sealed by bolts or sealing plugs.

[0043] In this embodiment, the tether rope 8 passes through the pre-drilled hole 15 and is fixedly connected to the bottom eccentric part of the detection module 1. The tether rope 8 is externally placed on the support mechanism. The four tether ropes 8 are distributed in the east, south, west and north directions of the universal joint. The four sets of connecting springs 9 are arranged corresponding to the tether ropes 8. When subjected to an impact force in a certain direction, the tether rope 8 on the side closest to the aircraft quickly tightens and pulls the corresponding side of the universal joint upward. The side of the universal joint away from the aircraft tilts downward. After the tether rope 8 on that side is straightened, it pulls the detection module 1 on the side away from the aircraft to bend downward. This converts the lateral impact force of the aircraft into a downward pulling force on the detection module 1, which can cause the easy-break rod 3 to bend and break at the easy-break point 5, thereby reducing the damage to the aircraft.

[0044] The usage process of the anti-fall-off device for the FOD runway foreign object detection equipment provided by this utility model is as follows: When the detection module 1 is impacted, the easy-break rod 3 breaks at the easy-break point 5, and the detection module 1 bends downward in the direction of the impact force. At this time, the tether rope 8 on the side adjacent to the aircraft quickly tightens and pulls the universal joint to rotate, while the connecting spring 9 on the same side is in a stretched state. The connecting spring 9 buffers the instantaneous impact force. Subsequently, multiple tether ropes 8 tighten and disperse the impact force, while multiple connecting springs 9 buffer the impact force simultaneously. When the easy-break rod 3 is completely broken, each tether rope 8 always keeps the detection module 1 taut, preventing it from rolling into the runway.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model 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 specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A FOD runway foreign object detection device anti-falling device, comprising a support mechanism and a detection module (1) mounted on the support mechanism, the support mechanism comprising a mounting chassis (2), a breakable rod (3) and a support rod (4), the breakable rod (3) and the support rod (4) are both hollow structures, a breakable point (5) is arranged on the breakable rod (3), the lower end of the breakable rod (3) is connected with the mounting chassis (2), the upper end of the breakable rod (3) is connected with the lower end of the support rod (4), and the upper end of the support rod (4) is fixed with the detection module (1); characterized in that, The anti-falling buffer mechanism comprises a mounting plate (6) fixedly connected with the mounting chassis (2), a universal ball (7) fixedly mounted on the mounting plate (6), a universal seat rotatably connected with the universal ball (7), and a plurality of tethering ropes (8) evenly distributed around the universal seat.

2. The FOD runway foreign object detection apparatus anti-drop device according to claim 1, characterized in that, The anti-falling buffer mechanism further comprises a plurality of connecting springs (9) evenly distributed around the universal seat, one end of each of the connecting springs (9) being hingedly connected with the bottom of the universal seat, and the other end of each of the connecting springs (9) being hingedly connected with the top of the mounting plate (6).

3. The FOD runway foreign object detection apparatus anti-drop device according to claim 1, characterized in that, The inner wall of the easy-to-fold rod (3) is provided with a semi-annular protruding ring (10) near the easy-to-fold point (5).

4. The FOD runway foreign object detection apparatus anti-drop device according to claim 1, characterized in that, The universal seat comprises a seat body (11) and a cylinder body (12) detachably connected with the seat body (11), and a spherical cavity (13) matching the outer wall of the universal ball (7) is arranged in each of the seat body (11) and the cylinder body (12), and the universal ball (7) is detachably mounted on the mounting plate (6).

5. The FOD runway foreign object detection apparatus anti-drop device according to claim 4, characterized in that, The seat body (11) and the universal ball (7) are both provided with through holes (14) communicating with each other.

6. The FOD runway foreign object detection apparatus anti-drop device according to claim 1, characterized in that, The tethering ropes (8) are at least four in number, and the connecting springs (9) are at least four in number, one tethering rope (8) and one connecting spring (9) being arranged in pairs on the upper and lower sides of the universal seat.

7. The FOD runway foreign object detection apparatus anti-drop device according to claim 6, characterized in that, The mounting chassis (2) is provided with at least four reserved holes (15) evenly distributed in the circumferential direction.

8. The FOD runway foreign object detection apparatus anti-drop device according to claim 1, characterized in that, The tethering ropes (8) are made of rigid steel wire ropes, and the tethering ropes (8) are provided with an elastic allowance.

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