Anti-falling device for high-altitude maintenance operation

Abstract

The invention relates to the technical field of anti-falling, in particular to an anti-falling device for high-altitude overhaul operation, which comprises two mounting rods, supporting rods are arranged on the side walls of the two mounting rods, a safety net is arranged between the two supporting rods, and a plurality of connecting ropes are arranged on the side walls of the two supporting rods. According to the anti-falling device for the high-altitude overhaul operation, the multiple winding drum mechanisms arranged in the supporting rod work cooperatively with the connecting rope system, intelligent adjustment of the posture of the safety net is achieved, and when falling is detected, the control system can control the safety net to fall according to data of the tension sensor. The motor and the clutch unit on the side far away from a falling point are accurately controlled, so that the corresponding connecting rope is actively unwound to form a net surface form inclining towards the center, the active adjusting mechanism effectively solves the limitation of passive protection of a traditional anti-falling net, it is ensured that falling personnel can stably slide to the center of the net, and the risk of secondary falling is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of anti-falling technology, in particular to an anti-falling device for high-altitude maintenance operations. Background Art

[0002] High-altitude work refers to people working at a height with a certain position as the reference. It is two meters or more above the falling height reference plane. In order to prevent workers from falling from a height and getting injured during work, high-altitude fall prevention devices are needed to ensure the safety of workers. Fall prevention nets are a relatively common method. However, when the fall prevention net catches falling workers or objects, the protective net will deform downward after the impact, and then the protective net may bounce the falling components or people up. Construction workers or components are easily bounced out of the protective net and continue to fall down.

[0003] In order to solve the above problems, Chinese patent publication number: CN113216662B discloses a fall prevention device for construction, including: a mounting base, having two symmetrically arranged support rod frames; a buffer slide, arranged corresponding to the number of the support rod frames, and the buffer slide can be reset and slidably arranged on the lower half of each of the support rod frames; a support cross bar, arranged corresponding to the number of the support rod frames, one end of the support cross bar is hingedly arranged at the middle part of each of the support rod frames, and a damping mechanism is provided inside the support cross bar; an oblique rod, arranged corresponding to the number of the support rod frames, and the oblique rod is hinged to the buffer slide and the support cross bar arranged on the same support rod frame; a load-bearing net assembly, which is movably arranged between the support cross bars and absorbs the impact gravity of falling objects from high altitude after being connected to the damping mechanism of the support cross bars.

[0004] However, it uses a large number of springs as buffer components. When the springs are impacted, the kinetic energy is converted into elastic potential energy. After the impact, the potential energy will be released in the opposite direction. When the springs release energy after compression, it may cause a secondary rebound, increasing safety hazards. For this reason, we propose a fall prevention device for high-altitude maintenance operations. Summary of the Invention

[0005] In order to solve the above technical problems, an embodiment of the present application provides a fall prevention device for high-altitude maintenance operations, comprising two mounting rods, both side walls of the mounting rods are provided with support rods, a safety net is provided between the two support rods, and both side walls of the support rods are provided with multiple connecting ropes, and the multiple connecting ropes are connected to the side of the safety net. A cavity is provided inside the support rod and multiple drums are provided in the cavity, one end of the connecting rope is wound around the drum, and the other end of the connecting rope is provided with a connecting piece, and the connecting ropes on both sides are connected to each other through the connecting piece, the outer end of the drum is connected to a damping unit, a motor is provided in the cavity, a drive shaft is provided at the output end of the motor, the drum is sleeved on the outside of the drive shaft, and a clutch unit is provided on the outside of the drive shaft.

[0006] In some embodiments, the connecting member includes a flexible rod with a soft pad provided on the top of the flexible rod, and multiple tension sensors are provided on both sides of the flexible rod, and the ends of the connecting ropes on both sides are respectively connected to each tension sensor.

[0007] In some embodiments, a plurality of support seats are fixedly disposed in the cavity, the drive shaft rotates through the support seats, the plurality of reels are disposed in a linear array outside the drive shaft, and a plurality of clutch units are disposed at positions of the drive shaft corresponding to the reels.

[0008] In some embodiments, the damping unit includes a fixed sleeve fixed in the cavity, multiple one-way rollers are provided at both ends of the reel, the outer side of the one-way roller abuts the inner side of the fixed sleeve, and a connecting ring is provided at the end of the guide roller away from the reel. The multiple one-way rollers are all connected to the connecting ring, and multiple connecting claws are movably provided on the connecting ring. A driving unit for driving the connecting claw to move is provided on the outer side of the connecting claw.

[0009] In some embodiments, a sliding groove is provided on the side wall of the reel and the connecting ring, a slider is slidingly arranged in the sliding groove, the two ends of the rotating shaft of the one-way roller are respectively connected to the sliders on both sides, a support spring is connected to the bottom of the slider, the other end of the support spring is connected to the inner wall of the sliding groove, and the connecting claw is fixed on the slider on the connecting ring.

[0010] In some embodiments, the driving unit includes a retaining ring fixed in the cavity, the side wall of the retaining ring is connected to an elastic telescopic rod, the end of the elastic telescopic rod is connected to the driving ring, and the opposite sides of the retaining ring and the driving ring are respectively provided with an electromagnet and a magnetic plate. When the electromagnet is energized, it can repel the magnetic plate and drive the driving ring to squeeze the connecting claw.

[0011] In some embodiments, the outer diameters of the reels are different, and the outer diameters of the reels gradually decrease from the middle of the support rod to the sides of the support rod.

[0012] In some embodiments, a movable groove is provided on the inner side of the drive shaft, and the clutch unit includes a friction plate slidably arranged in the movable groove, a return spring is provided at the bottom of the friction plate, an electromagnet is provided in the movable groove and the friction plate is made of magnetic material, and when the electromagnet is energized, the friction plate is repelled and moves to abut the inner side of the reel.

[0013] In some embodiments, the inner side of the reel is roughened at a position corresponding to the friction plate.

[0014] In some embodiments, the outer side of the support rod is wrapped with a soft coating.

[0015] The present invention has at least the following beneficial effects: This device achieves intelligent adjustment of the safety net's posture through the coordinated operation of multiple reel mechanisms within the support rods and the connecting rope system. When a fall is detected, the control system, based on data from the tension sensor, precisely controls the motor and clutch unit on the side away from the fall point, actively unwinding the corresponding connecting rope, forming a net shape that tilts toward the center. This active adjustment mechanism effectively overcomes the passive protection limitations of traditional anti-fall nets, ensuring that a falling person can slide smoothly toward the center of the net, significantly reducing the risk of a secondary fall. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is another structural diagram of the present invention; Figure 3 This is a schematic diagram of the support rod and connecting rope structure of the present invention; Figure 4 This is a schematic diagram of the connector structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the support rod of the present invention; Figure 6 This is a structural diagram of the reel of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of local structure; Figure 8 This is a structural diagram of the connecting ring of the present invention; Figure 9 This is a schematic diagram of the structure of the drive unit of the present invention; Figure 10 This is a structural diagram of the drive shaft of the present invention; Figure 11 It is a schematic structural diagram of the clutch unit of the present invention.

[0017] In the figure: 1. Mounting rod; 2. Support rod; 3. Safety net; 4. Connecting rope; 5. Reel; 6. Connecting piece; 61. Flexible rod; 62. Tension sensor; 7. Damping unit; 71. Fixing sleeve; 72. One-way roller; 73. Connecting ring; 74. Connecting claw; 8. Drive shaft; 9. Clutch unit; 91. Friction plate; 92. Return spring; 10. Drive unit; 101. Retaining ring; 102. Elastic telescopic rod; 103. Drive ring; 104. Magnetic plate; 11. Support seat; 12. Slide groove; 13. Slider; 14. Support spring; 15. Movable groove. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figure 1-Figure 3 The present invention provides a technical solution: a fall prevention device for high-altitude maintenance work, comprising two mounting rods 1, the two mounting rods 1 are symmetrically arranged, which are vertically arranged metal rods with a rectangular cross-section. The side walls of the mounting rods 1 can be provided with bolt holes, and flanges are welded at the bottom, and then they can be fixedly connected to external components by bolts or hoops. It serves as the basic carrier of the device, and the side walls of the two mounting rods 1 are both provided with support rods 2. The support rods 2 are square hollow steel beams, and the outer side of the support rods 2 is covered with a soft layer, and the specific soft layer can be rubber or sponge. A safety net 3 is arranged between the two support rods 2. When a person falls accidentally, he or she can fall onto the safety net 3. The safety net 3 itself has a certain buffering effect, which can protect the person and play a bearing and buffering effect. Multiple connecting ropes 4 are provided on the side walls of the two support rods 2. The connecting ropes 4 are perpendicular to the support rods 2, and the connecting ropes 4 are arranged below the horizontal ropes of the safety net 3. Multiple connecting ropes 4 are connected to the side edges of the safety net 3, that is, the side edges of the safety net 3 and the connecting ropes 4 are close to the support rods 2. The outer side of the segment is connected, and the overall structure is support rod 2-connecting rope 4-safety net 3. A cavity is provided inside the support rod 2 and a plurality of drums 5 are provided in the cavity. One end of the connecting rope 4 is wound on the drum 5, and then when the drum 5 rotates forward and reverse respectively, the connecting rope 4 can be unwound and reeled, and the other end of the connecting rope 4 is provided with a connecting piece 6, and the connecting ropes 4 on both sides are connected to each other through the connecting piece 6. The connecting piece 6 is located in the middle of the two support rods 2 and also in the middle of the safety net 3 and is arranged parallel to the support rod 2. The outer end of the drum 5 is connected to a damping unit 7. When a person falls on the safety net 3, the safety net 3 is first deformed to act as a buffer. Then the impact force drives the drum 5 to rotate through the connecting rope 4, and then the damping unit 7 consumes the kinetic energy brought by the impact force, and converts the mechanical energy into heat energy. A motor is provided in the cavity, and a drive shaft 8 is provided at the output end of the motor. The drum 5 is sleeved on the outside of the drive shaft 8, and a clutch unit 9 is provided on the outside of the drive shaft 8. The clutch unit 9 can change the connection state between the drive shaft 8 and the drum 5.

[0020] When a person falls from a height accidentally, he will fall onto the safety net 3. When falling onto the safety net 3, the worker may fall at any position of the safety net 3. At the landing point, the safety net 3 around the landing point will first be deformed, and the connecting rope 4 below will also be under pressure, so that the tension on the connecting ropes 4 on both sides of the connecting member 6 is inconsistent, that is, the connecting rope 4 closer to the landing point is subjected to greater tension. At this time, the connecting member 6 detects this state, and then controls the motor on the other side, that is, the side away from the landing point, to drive the reel 5 to rotate, and actively unwind the connecting rope 4 on this side for a distance. In this way, the connecting rope 4 close to the landing point can consume the impact force through the damping unit 7, and the connecting rope 4 on the other side is actively unwound so that the unwinding side is slightly lower than the landing point side, so that the person can roll to the center of the safety net 3 after falling on the safety net 3.

[0021] Example 2: Please refer to Figure 4-Figure 5 The present invention provides a technical solution: a fall prevention device for high-altitude maintenance work, the connecting part 6 includes a flexible rod 61, the flexible rod 61 can be a soft rod made of silicone material, but the material is not limited, a soft pad is provided on the top of the flexible rod 61, and a plurality of tension sensors 62 are provided on both sides of the flexible rod 61, and the ends of the connecting ropes 4 on both sides are respectively connected to each tension sensor 62, and then when a person falls on the safety net 3, he will also fall on the connecting rope 4, and then the landing position is judged by the difference in detection data of the tension sensors 62 on both sides, and then the motor is controlled to unwind the connecting rope 4, so that the safety net 3 has a certain inclination angle, so that after the person falls on the safety net 3, even if there is a certain rebound force, he will move to the center position of the safety net 3 to avoid a second fall.

[0022] A plurality of support seats 11 are fixedly arranged in the cavity, and the drive shaft 8 rotates and passes through the support seats 11. The drive shaft 8 is supported by the plurality of support seats 11 so that it can run stably in the cavity. A plurality of reels 5 are arranged in a linear array on the outside of the drive shaft 8. The number of reels 5 is consistent with the number of connecting ropes 4, and a plurality of clutch units 9 are provided at the position of the drive shaft 8 corresponding to the reel 5. When the clutch unit 9 is started, the drive shaft 8 can drive the reel 5 to rotate when it rotates. When the clutch unit 9 is closed, the drive shaft 8 will not drive the reel 5 to rotate when it rotates.

[0023] Example 3: Please refer to Figure 6-Figure 9The present invention provides a technical solution: an anti-falling device for high-altitude maintenance work, the damping unit 7 includes a fixed sleeve 71 fixedly arranged in the cavity, and a plurality of one-way rollers 72 are provided at both ends of the drum 5. The function of the one-way roller 72 can be achieved by a one-way bearing, that is, the one-way roller 72 can only rotate in one direction, and the outer side of the one-way roller 72 abuts the inner side of the fixed sleeve 71. When the one-way roller 72 rotates forward, it can rotate along the inner side of the fixed sleeve 71. When the one-way roller 72 rotates reversely, its rolling contact with the inner side of the fixed sleeve 71 is converted into sliding friction. The forward rotation direction of the one-way roller 72 is the direction of rotation of the drum 5 when the connecting rope 4 is reeled in, and the reverse rotation of the one-way roller 72 is the direction of rotation of the drum 5 when the connecting rope 4 is unreeled. When the person falls onto the safety net 3, the connecting rope 4 will also be impacted and drive the drum 5 to rotate. At this time, there is sliding friction between the one-way roller 72 and the inner side of the fixed sleeve 71, and then the mechanical energy is converted into heat energy through friction, which consumes the impact force caused by the person falling and effectively avoids secondary falling. A connecting ring 73 is provided at the end of the guide roller away from the drum 5, and multiple one-way rollers 72 are connected to the connecting ring 73. Multiple connecting claws 74 are movably provided on the connecting ring 73. The outer side of the connecting claw 74 is set as an inclined surface, and a driving unit 10 is provided on the outer side of the connecting claw 74 to drive it to move. When the connecting claw 74 moves toward the center position of the drum 5, the connecting claw 74 drives the one-way roller 72 away from the fixed sleeve 71. At this time, the two are not in contact. At this time, the motor drives the drum 5 to actively unwind the connecting rope 4 relatively smoothly.

[0024] The side wall of the reel 5 and the connecting ring 73 are both provided with a slide groove 12. The direction of the slide groove 12 is along the radial direction of the reel 5. A slider 13 is slidingly provided in the slide groove 12. The two ends of the rotating shaft of the one-way roller 72 are respectively connected to the sliders 13 on both sides. When the slider 13 moves, it can drive the one-way roller 72 to move. A support spring 14 is connected to the bottom of the slider 13. In the initial state, the support spring 14 supports the slider 13, and then supports the one-way roller 72 so that it abuts the inner side of the fixed sleeve 71. The other end of the support spring 14 is connected to the inner wall of the slide groove 12. The connecting claw 74 is fixedly provided on the slider 13 on the connecting ring 73, and when the connecting claw 74 moves, it can drive the slider 13 to move, and then drive the one-way roller 72 to move.

[0025] The drive unit 10 includes a retaining ring 101 fixedly arranged in the cavity. The side wall of the retaining ring 101 is connected to an elastic telescopic rod 102. The end of the elastic telescopic rod 102 is connected to the drive ring 103. The elastic telescopic rod 102 plays a guiding and fixing role, so that the drive ring 103 can move stably along the axial direction of the retaining ring 101. The opposite sides of the retaining ring 101 and the drive ring 103 are respectively provided with an electromagnet and a magnetic plate 104. When the electromagnet is energized, it can repel the magnetic plate 104 and drive the drive ring 103 to squeeze the connecting claw 74. , and then the connecting claw 74 drives the slider 13 to move, and the slider 13 drives the one-way roller 72 away from the inner side of the fixed sleeve 71. At this time, the damping unit 7 no longer works, and then the motor drives the reel 5 to actively unwind the connecting rope 4, which can proceed smoothly. When the electromagnet is no longer energized, under the action of the elastic telescopic rod 102, the drive ring 103 is reset, and under the action of the supporting spring 14, the connecting claw 74 and the slider 13 are also reset, thereby driving the one-way roller 72 to abut the inner side of the fixed sleeve 71 again, so that the damping unit 7 can work again.

[0026] Example 4: The present invention provides a technical solution: a fall prevention device for high-altitude maintenance operations, wherein the outer diameters of the drums 5 are different, and the outer diameters of the drums 5 gradually decrease from the middle position of the support rod 2 to the positions on both sides of the support rod 2. Through this gradual setting, when the motor unwinds the connecting rope 4 through the drum 5, the unwinding length of the connecting rope 4 in the middle is the largest, so that the safety net 3 as a whole presents a concave shape in the middle, and then when a person falls accidentally, even if some rebound occurs, this shape will prompt the person to move to the middle position of the safety net 3, effectively ensuring the safety of the workers.

[0027] Example 5: Please refer to Figure 10-11 When the electromagnet is energized, the friction plate 91 is repelled and moved against the inner side of the drum 5, thereby driving the drum 5 to rotate when the drive shaft 8 is rotated, and the drum 5 can be driven to unwind or rewind the connecting rope 4. When the electromagnet is not energized, the friction plate 91 is reset to a position away from the inner side of the drum 5 under the action of the return spring 92. At this time, the rotation of the drive shaft 8 cannot drive the drum 5 to rotate. In this way, the passive damping unwinding of the connecting rope 4 driving the drum 5 to rotate can be completed to consume energy, and the active unwinding of the connecting rope 4 driven by the motor can also be completed, so as to facilitate the adjustment of the state of the safety net 3, so that the person who falls on the safety net 3 can more easily roll to the center position of the safety net 3.

[0028] The inner side of the reel 5 corresponding to the friction plate 91 is roughened to increase friction and improve transmission efficiency.

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0030] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A fall prevention device for high-altitude maintenance work, comprising two mounting rods (1), the side walls of the two mounting rods (1) are each provided with a support rod (2), and a safety net (3) is provided between the two support rods (2), characterized in that: The side walls of the two support rods (2) are each provided with a plurality of connecting ropes (4), and the plurality of connecting ropes (4) are all connected to the side of the safety net (3). A cavity is provided inside the support rod (2), and a plurality of reels (5) are provided in the cavity. One end of the connecting rope (4) is wound on the reel (5), and the other end of the connecting rope (4) is provided with a connecting piece (6), and the connecting ropes (4) on both sides are connected to each other through the connecting piece (6). The outer end of the reel (5) is connected to a damping unit (7), a motor is provided in the cavity, and a drive shaft (8) is provided at the output end of the motor. The reel (5) is sleeved on the outside of the drive shaft (8), and a clutch unit (9) is provided on the outside of the drive shaft (8).

2. The anti-fall device for high-altitude maintenance work according to claim 1 is characterized in that: The connecting member (6) comprises a flexible rod (61), a soft pad is provided on the top of the flexible rod (61), a plurality of tension sensors (62) are provided on both sides of the flexible rod (61), and the ends of the connecting ropes (4) on both sides are respectively connected to the tension sensors (62).

3. The anti-fall device for high-altitude maintenance work according to claim 1 is characterized in that: A plurality of support seats (11) are fixedly arranged in the cavity, the drive shaft (8) rotates and passes through the support seats (11), the plurality of reels (5) are arranged in a linear array outside the drive shaft (8), and a plurality of clutch units (9) are arranged at positions of the drive shaft (8) corresponding to the reels (5).

4. The anti-fall device for high-altitude maintenance work according to claim 1 is characterized in that: The damping unit (7) comprises a fixed sleeve (71) fixedly arranged in the cavity, a plurality of one-way rollers (72) are provided at both ends of the reel (5), the outer sides of the one-way rollers (72) abut against the inner sides of the fixed sleeve (71), a connecting ring (73) is provided at one end of the guide roller away from the reel (5), the plurality of one-way rollers (72) are all connected to the connecting ring (73), a plurality of connecting claws (74) are movably provided on the connecting ring (73), and a driving unit (10) for driving the connecting claws (74) to move is provided on the outer sides of the connecting claws (74).

5. The anti-fall device for high-altitude maintenance work according to claim 4 is characterized in that: A sliding groove (12) is provided on the side wall of the reel (5) and the connecting ring (73), a slider (13) is slidably provided in the sliding groove (12), both ends of the rotating shaft of the one-way roller (72) are respectively connected to the sliders (13) on both sides, a supporting spring (14) is connected to the bottom of the slider (13), the other end of the supporting spring (14) is connected to the inner wall of the sliding groove (12), and the connecting claw (74) is fixedly provided on the slider (13) on the connecting ring (73).

6. The anti-fall device for high-altitude maintenance work according to claim 4, characterized in that: The drive unit (10) comprises a retaining ring (101) fixedly arranged in the cavity, a side wall of the retaining ring (101) being connected to an elastic telescopic rod (102), an end of the elastic telescopic rod (102) being connected to a drive ring (103), and an electromagnet and a magnetic plate (104) being respectively provided on opposite sides of the retaining ring (101) and the drive ring (103), and when the electromagnet is energized, it can repel the magnetic plate (104) so as to drive the drive ring (103) to squeeze the connecting claw (74).

7. The anti-fall device for high-altitude maintenance work according to claim 1 is characterized in that: The outer diameters of the reels (5) are all different, and the outer diameters of the reels (5) gradually decrease from the middle of the support rod (2) to the positions on both sides of the support rod (2).

8. The anti-fall device for high-altitude maintenance work according to claim 1, characterized in that: A movable groove (15) is provided on the inner side of the driving shaft (8), and the clutch unit (9) includes a friction plate (91) slidably arranged in the movable groove (15). A return spring (92) is provided at the bottom of the friction plate (91). An electromagnet is provided in the movable groove (15) and the friction plate (91) is made of a magnetic material. When the electromagnet is energized, the friction plate (91) is repelled and moves to abut against the inner side of the reel (5).

9. The anti-fall device for high-altitude maintenance work according to claim 8, characterized in that: The inner side of the reel (5) corresponding to the position of the friction plate (91) is roughened.

10. The anti-fall device for high-altitude maintenance work according to claim 1, characterized in that: The outer side of the support rod (2) is wrapped with a soft covering layer.

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