A new type of fully automatic safety anti-fall net for training

Abstract

This invention discloses a novel fully automatic safety fall arrest net for training, comprising a crossbeam, a safety net, a monitoring system, and a PLC control system. The crossbeams are symmetrically arranged on both sides of a fire training building. The right end of the crossbeam is fixedly connected to the side wall of the fire training building, while the left end extends outwards from the climbing surface of the fire training building. A net-rolling rod is installed between the left ends of the crossbeams, rotatably connected to the crossbeams for winding the safety net. A net-rolling mechanism and a net-unrolling mechanism are installed on the crossbeams, with a slider slidably connected to the crossbeams. The net-rolling mechanism is driven by the net-rolling rod, and the net-unrolling mechanism is driven by the slider. One end of the safety net is fixedly connected to the net-rolling rod, and the other end is fixedly connected to the slider. This invention, by setting up a safety net, a net-rolling mechanism, and a net-unrolling mechanism, achieves fully automatic net retrieval and unrolling, eliminating the need for soldiers to manually pull and retrieve the net, thus saving a significant amount of heavy physical labor.

Description

Technical Field

[0001] This invention relates to the field of fire training safety technology, specifically a new type of fully automatic safety fall protection net for training. Background Technology

[0002] Firefighting training fall protection nets are installed on the walls of training buildings to prevent firefighters from falling and getting injured while training at heights, without interfering with normal training. Currently, existing fall protection nets are installed between two steel channels, and the net is extended and retracted by manually pulling a steel cable that slides between pulleys. However, this method has the following drawbacks: It requires manual installation or removal before training, which is time-consuming and labor-intensive, affecting training efficiency and creating blind spots and potential hazards during training; it cannot automatically extend the net, requiring manual deployment; it cannot automatically retract the net after training, requiring manual retraction; it cannot be automatically controlled; and it cannot monitor and record the firefighters' movements and training time. Summary of the Invention

[0003] The purpose of this invention is to provide a novel fully automatic safety net for training to address the shortcomings of existing safety nets mentioned in the background art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A novel fully automatic safety fall arrest net for training includes a crossbeam, a safety net, a monitoring system, and a PLC control system. The crossbeams are symmetrically arranged on both sides of a fire training building. The right end of each crossbeam is fixedly connected to the side wall of the fire training building, while the left end extends outwards from the climbing surface of the fire training building. A net-rolling rod is installed between the left ends of the crossbeams, and the net-rolling rod is rotatably connected to the crossbeams for winding the safety net. A net-rolling mechanism and a net-unwinding mechanism are installed on the crossbeams. A slider is slidably connected to the crossbeams. The net-rolling mechanism is driven by the net-rolling rod, and the net-unwinding mechanism is driven by the slider. One end of the safety net is fixedly connected to the net-rolling rod, and the other end is fixedly connected to the slider. The monitoring system includes a pull rope encoder, an upper grating, a lower grating, and a camera vision system. The pull rope encoder is fixedly installed on the slider and is used to detect the degree of unfolding and retraction of the safety net. The upper and lower gratings are installed on the climbing surface of the fire training building and are located above and below the safety net, respectively, and are used to detect whether personnel or objects pass through the location of the grating. The camera vision system is used to monitor the status of the trainees. The PLC control system is electrically connected to the net-rolling mechanism, the net-unrolling mechanism, and the monitoring system.

[0006] Furthermore, the winding mechanism includes a winding variable frequency reduction motor and a tension sprocket. The winding variable frequency reduction motor is fixedly installed at the right end of the crossbeam. The winding variable frequency reduction motor is driven by a drive sprocket. A driven sprocket shaft is provided at the left end of the crossbeam. The driven sprocket shaft is provided with a driven sprocket and a drive gear. The drive sprocket, driven sprocket, and tension sprocket form a chain drive system through a chain.

[0007] Furthermore, driven gears are provided at both ends of the wire mesh rod, and the driven gears mesh with the driving gears for transmission.

[0008] Furthermore, the net-laying mechanism includes a net-laying variable frequency geared motor, a driven pulley, and a tension pulley. The net-laying variable frequency geared motor is fixedly mounted on the crossbeam and located to the left of the net-laying variable frequency geared motor. The net-laying variable frequency geared motor is driven by a driving pulley. The driven pulley is fixedly mounted on the crossbeam and located to the right of the driven sprocket. The driving pulley, driven pulley, and tension pulley form a belt drive system through a synchronous belt.

[0009] Furthermore, a slide rail is provided in the middle of the crossbeam, and the slider includes a slider body, a timing belt clamp, and a timing belt clamp plate. The slider body is provided with an upper roller and a lower roller, which are in rolling contact with the upper and lower surfaces of the slide rail, respectively. Side rollers are provided on both sides of the slider body, and the side rollers are in rolling contact with the sides of the crossbeam. The timing belt clamp is fixedly connected to the slider body and is located below the inner side of the timing belt. The timing belt clamp plate presses on the timing belt and is fixedly connected to the timing belt clamp.

[0010] Furthermore, the wire mesh rod is made of aluminum alloy tube, and multiple fixing holes for fixing the safety net are opened on the outer axial surface.

[0011] Furthermore, the safety net is made of high-strength nylon and is reinforced with steel wire ropes around its perimeter.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This invention achieves fully automated net retrieval and deployment by setting up a safety protection net, a net rolling mechanism, and a net deploying mechanism, eliminating the need for soldiers to manually pull and retrieve the net, thus saving a lot of heavy physical labor in pulling and retrieving the net.

[0014] 2. This invention is equipped with a monitoring system that enables precise deployment and retraction of the net, and allows for training on climbing ladders at different heights. At the same time, it can dynamically detect the deployment position of the safety net in real time, and through fully automatic, precise and efficient control, it can more effectively protect the lives of soldiers.

[0015] 3. This invention is equipped with a camera vision system that uses high-pixel real-time detection to record and analyze soldiers' training movements, which helps to improve training effectiveness. Attached Figure Description

[0016] Figure 1 This is a front view of the structure of the present invention;

[0017] Figure 2 This is a bottom view of the structure of the present invention;

[0018] Figure 3 for Figure 2 Sectional view of AA;

[0019] Figure 4 This is a schematic diagram of the slider structure;

[0020] Figure 5 Diagram showing the slider installation;

[0021] Figure 6 This is a schematic diagram of the installation of the present invention;

[0022] Figure 7 This is a schematic diagram of the invention;

[0023] In the diagram: 1-Crossbeam, 101-Slide rail, 2-Wrapping rod, 3-Wrapping mechanism, 301-Wrapping variable frequency geared motor, 302-Drive sprocket, 303-Driven sprocket shaft, 304-Driven sprocket, 305-Driven gear, 306-Chain, 307-Tension sprocket, 4-Network spreading mechanism, 401-Network spreading variable frequency geared motor, 402-Drive pulley, 403-Driven pulley, 404-Tension pulley, 405-Synchronous belt, 5-Slider, 501-Slider body, 502-Upper roller, 503-Lower roller, 504-Side roller, 505-Synchronous belt clamp, 506-Synchronous belt clamp plate, 507-Protective net fixing device, 6-Rope encoder, 7-Safety net, 8-Upper grating, 9-Lower grating, 10-Fire training building. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] See also Figures 1-7 One embodiment provided by the present invention:

[0026] A novel fully automatic safety fall arrest net for training includes a crossbeam 1, a safety net 7, a monitoring system, and a PLC control system. The crossbeam 1 is symmetrically installed on both sides of a fire training building 10. The right end of the crossbeam 1 is fixedly connected to the side wall of the fire training building 10, and the left end extends outwards from the climbing surface of the fire training building 10. A net-rolling rod 2 is installed between the left ends of the crossbeam 1, and the net-rolling rod 2 is rotatably connected to the crossbeam 1 for winding the safety net 7. A net-rolling mechanism 3 and a net-unwinding mechanism 4 are installed on the crossbeam 1. A slider 5 is slidably connected to the crossbeam 1. The net-rolling mechanism 3 is driven by the net-rolling rod 2, and the net-unwinding mechanism 4 is driven by the slider 5. One end of the safety net 7 is fixedly connected to the net-rolling rod 1, and the other end is fixedly connected to the slider 5. The net-rolling mechanism 3 drives the net-rolling rod 2 to rotate, thereby causing the left end of the safety net 7 to be wound or unwound. The net-unwinding mechanism 4... The drive slider 5 slides left and right on the slide rail 101, thereby moving the right end of the safety net 7 left and right. In conjunction with the rotation of the net-rolling rod 2, the safety net 7 can be automatically deployed or retracted. The monitoring system includes a pull rope encoder 6, an upper grating 8, a lower grating 9, and a camera vision system. The pull rope encoder 6 is fixedly installed on the slider 5 and is used to detect the degree of deployment and retraction of the safety net 7. The upper grating 8 and the lower grating 9 are installed on the climbing surface of the fire training building 10 and are located at the upper and lower parts of the safety net 7, respectively. They are used to detect whether there are personnel or objects passing through the location of the grating. The camera vision system is used to monitor the status of the trainees. The PLC control system is electrically connected to the net-rolling mechanism 3, the net-unfolding mechanism 4, and the monitoring system. Through the feedback of the monitoring system, the actions of the net-rolling mechanism 3 and the net-unfolding mechanism 4 are controlled.

[0027] The winding mechanism 3 includes a winding variable frequency reduction motor 301 and a tension sprocket 307. The winding variable frequency reduction motor 301 is fixedly installed on the right end of the crossbeam 1. The winding variable frequency reduction motor 301 drives and connects to the drive sprocket 302. A driven sprocket shaft 303 is installed at the left end of the crossbeam 1. The driven sprocket shaft 303 is equipped with a driven sprocket 304 and a drive gear 305. The drive sprocket 302, the driven sprocket 304, and the tension sprocket 307 form a chain drive system through the chain 306. Driven gears are provided at both ends of the winding rod 2. The driven gears mesh with the drive gear 305 for transmission. The winding variable frequency reduction motor 301 can drive the winding rod 2 to rotate through the chain drive system, the drive gear 305, and the driven gear.

[0028] The netting mechanism 4 includes a netting variable frequency reduction motor 401, a driven pulley 403, and a tension pulley 404. The netting variable frequency reduction motor 401 is fixedly installed on the crossbeam 1 and located to the left of the netting variable frequency reduction motor 301. The netting variable frequency reduction motor 401 is driven by a drive pulley 402. The driven pulley 403 is installed on the crossbeam 1 and located to the right of the driven sprocket 304. The drive pulley 402, the driven pulley 403, and the tension pulley 404 form a belt drive system through a synchronous belt 405.

[0029] The crossbeam 1 has a slide rail 101 in the middle. The slider 5 includes a slider body 501, a timing belt clamp 505, and a timing belt clamp 506. The slider body 501 is equipped with an upper roller 502 and a lower roller 503. The upper roller 502 and the lower roller 503 roll in contact with the upper and lower surfaces of the slide rail 101, respectively, so that the slider 5 can move smoothly along the slide rail 101. Side rollers 504 are provided on both sides of the slider body 501. The side rollers 504 roll in contact with the sides of the crossbeam 1 to prevent the slider 5 from falling off the slide rail 101 and to further ensure the smooth movement of the slider 5. The timing belt clamp 505 is fixedly connected to the slider body 501 and is located inside and below the timing belt 405. The timing belt clamp 506 presses on the timing belt 405 and is fixedly connected to the timing belt clamp 505. When the variable frequency reduction motor 401 drives the timing belt 405 to move, the timing belt 405 can drive the slider 5 to slide on the slide rail 101.

[0030] The slider body 501 is equipped with a protective net fixing device 507, which is used to fix it to the safety net 7, so that the slider 5 can drive the right end of the safety net 7 to move.

[0031] The wire mesh rod 2 is made of aluminum alloy tube, and multiple fixing holes are opened on the outer shaft surface for fixing the safety net 7. After the left end of the safety net 7 is fixed on the wire mesh rod 2, the left end of the safety net 7 can be rolled up or loosened on the wire mesh rod 2 by rotating the wire mesh rod 2.

[0032] The safety net 7 is made of high-strength nylon and is reinforced with steel wire ropes around its perimeter.

[0033] Working principle of this invention:

[0034] Training preparation phase: Power on all electrical facilities, turn on the camera vision system, rope encoder 6, three-color lights, upper grating 8 and lower grating 9, slider 5 is in the initial position K, safety net 7 is rolled up to the left end of crossbeam 1, exposing the space for setting up the climbing ladder and climbing, trainees stand at the starting position with the climbing ladder in hand at a certain distance from the climbing surface of fire training building 10, ready for training;

[0035] Ladder Placement Phase: At the start of training, trainees run towards the climbing surface. When the camera vision system captures the trainee approaching the surface, it records the trainee's movement time and actions, saves the captured image, and sends a first signal to the PLC control system. When the trainee places the ladder on the climbing surface, the lower grating 9 detects the ladder and sends a second signal to the PLC control system. Upon receiving the first and second signals, the PLC control system starts the wire mesh winding variable frequency geared motor 301 and the wire mesh spreading variable frequency geared motor 401 via frequency converters A and B, respectively. The spreading variable frequency geared motor 401 rotates forward, and the synchronous belt 405 drives the slider 5 to drag the safety net. As the right end of safety net 7 moves to the right, the variable frequency reduction motor 301 reverses, driving the drive sprocket 302, driven sprocket 304, and drive gear 305 to rotate in the same direction. The winding rod 2 rotates forward under the meshing transmission of the drive gear 305 and driven gear, causing the wound safety net 7 to loosen, which is beneficial for the slider 5 to drag the safety net 7. When the slider 5 moves to position M, which is 1 meter away from the climbing surface, the rope encoder 6 sends a third signal to the PLC control system. The PLC control system controls the variable frequency reduction motor 301 and the variable frequency reduction motor 401 to stop running. At this time, the right end of the safety net 7 is 1 meter away from the climbing surface, leaving space for the trainees to climb upward.

[0036] Climbing Phase: Trainees climb the ladder upwards. When they pass the upper grating 8, the upper grating 8 sends a fourth signal to the PLC control system. After receiving the fourth signal and the fifth signal from the camera vision system indicating that no one is under the safety net 7, the PLC control system starts the net winding variable frequency reduction motor 301 and the net unfolding variable frequency reduction motor 401 through frequency converters A and B respectively. The net unfolding variable frequency reduction motor 401 rotates forward, and the slider 5 continues to drive the right end of the safety net 7 to move to the right. At the same time, the net winding variable frequency reduction motor 301 rotates in reverse to loosen the left end of the safety net 7 to coordinate with the unfolding action of the safety net 7. When the slider 5 moves to position N, which is 0.2 meters away from the climbing surface, the rope encoder 6 sends a sixth signal to the PLC control system. The PLC control system then stops the operation of the net winding variable frequency reduction motor 301 and the net unfolding variable frequency reduction motor 401. At this time, the safety net 7 is fully unfolded to prevent trainees from falling and getting injured.

[0037] Training completion phase: The camera vision system captures footage showing that all trainees have completed the climbing process and entered the fire training building 10. It then sends the seventh signal to the PLC control system. The PLC control system starts the net-rolling variable frequency reduction motor 301 and the net-unrolling variable frequency reduction motor 401. The net-unrolling variable frequency reduction motor 401 reverses, causing the slider 5 to move the right end of the safety net 7 to the left, away from the climbing surface. Simultaneously, the net-rolling variable frequency reduction motor 301 rotates forward, causing the net-rolling rod 2 to reverse and rewind the safety net 7. When the slider 5 moves to the initial position K, the rope encoder 6 sends the eighth signal to the PLC control system. The PLC control system then stops the net-rolling variable frequency reduction motor 301 and the net-unrolling variable frequency reduction motor 401, completing the net-rewinding process of the safety net 7.

[0038] This invention achieves fully automated net retrieval and deployment by setting up a safety net 7, a net rolling mechanism 3, and a net deploying mechanism 4, eliminating the need for soldiers to manually pull and retrieve the net, thus saving a lot of heavy physical labor in pulling and retrieving the net.

[0039] This invention is equipped with a monitoring system that enables precise deployment and retraction of the net, and allows for training on climbing ladders at different heights. Simultaneously, it can dynamically detect the deployment position of the safety net in real time, and through fully automatic, precise, and efficient control, it more effectively protects the lives of soldiers.

[0040] This invention is equipped with a camera vision system that uses high-pixel real-time detection to record and analyze soldiers' training movements, which helps to improve training effectiveness.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel fully automatic safety net for training, characterized in that: The system includes a crossbeam (1), a safety net (7), a monitoring system, and a PLC control system. The crossbeam (1) is symmetrically arranged on both sides of the fire training building (10). The right end of the crossbeam (1) is fixedly connected to the side wall of the fire training building (10), and the left end extends out of the climbing surface of the fire training building (10). A net-rolling rod (2) is provided between the left ends of the crossbeam (1). The net-rolling rod (2) is rotatably connected to the crossbeam (1) and is used to roll the safety net (7). A net-rolling mechanism (3) and a net-unrolling mechanism (4) are provided on the crossbeam (1). A slider (5) is slidably connected to the crossbeam (1). The net-rolling mechanism (3) is driven to the net-rolling rod (2), and the net-unrolling mechanism (4) is driven to the slider (5). One end of the full protective net (7) is fixedly connected to the net rolling rod (2), and the other end is fixedly connected to the slider (5). The monitoring system includes a pull rope encoder (6), an upper grating (8), a lower grating (9), and a camera vision system. The pull rope encoder (6) is fixedly installed on the slider (5) and is used to detect the degree of unfolding and retraction of the safety net (7). The upper grating (8) and the lower grating (9) are installed on the climbing surface of the fire training building (10) and are located at the upper and lower parts of the safety net (7) respectively. They are used to detect whether there are personnel or objects passing through the location of the grating. The camera vision system is used to monitor the status of the trainees. The PLC control system is electrically connected to the net rolling mechanism (3), the net unfolding mechanism (4), and the monitoring system respectively. Training begins. Trainees run toward the climbing surface. When the camera vision system captures the trainees approaching the climbing surface, it records the trainees' movement time and actions, saves the captured photos, and sends the first signal to the PLC control system. When the trainees place the climbing ladder on the climbing surface, the lower grating (9) detects the climbing ladder and sends the second signal to the PLC control system. After receiving the first and second signals, the PLC control system controls the operation of the net winding mechanism (3) and the net unfolding mechanism (4), driving the safety net (7) to move so that the right end of the safety net (7) is 1 meter away from the climbing surface, leaving space for the trainees to climb upwards. Trainees climb up the ladder and when they pass the upper light grid (8), the upper light grid (8) sends a fourth signal to the PLC control system. When the PLC control system receives the fourth signal and the fifth signal from the camera vision system indicating that no one is under the safety net (7), it controls the operation of the net winding mechanism (3) and the net unfolding mechanism (4) to drive the safety net (7) to move, so that the safety net (7) is fully unfolded to prevent trainees from falling and getting injured. The camera vision system captures the trainees having completed the climbing process and entered the fire training building (10). It sends the seventh signal to the PLC control system, which controls the operation of the net winding mechanism (3) and the net unfolding mechanism (4), drives the safety net (7) to move, and completes the net closing operation of the safety net (7).

2. The novel fully automatic training safety net according to claim 1, characterized in that: The winding mechanism (3) includes a winding variable frequency reduction motor (301) and a tension sprocket (307). The winding variable frequency reduction motor (301) is fixedly installed at the right end of the crossbeam (1). The winding variable frequency reduction motor (301) is driven by a drive sprocket (302). A driven sprocket shaft (303) is provided at the left end of the crossbeam (1). The driven sprocket shaft (303) is provided with a driven sprocket (304) and a drive gear (305). The drive sprocket (302), driven sprocket (304), and tension sprocket (307) form a chain drive system through a chain (306).

3. A novel fully automatic training safety net according to claim 2, characterized in that: The two ends of the wire mesh rod (2) are provided with driven gears, which mesh with the driving gear (305) for transmission.

4. A novel fully automatic safety net for training as described in claim 2, characterized in that: The netting mechanism (4) includes a netting variable frequency reduction motor (401), a driven pulley (403), and a tensioning pulley (404). The netting variable frequency reduction motor (401) is fixedly mounted on the crossbeam (1) and located to the left of the netting variable frequency reduction motor (301). The netting variable frequency reduction motor (401) is driven by a drive pulley (402). The driven pulley (403) is fixedly mounted on the crossbeam (1) and located to the right of the driven sprocket (304). The drive pulley (402), driven pulley (403), and tensioning pulley (404) form a belt drive system through a synchronous belt (405).

5. A novel fully automatic safety net for training as described in claim 4, characterized in that: The crossbeam (1) is provided with a slide rail (101) in the middle. The slider (5) includes a slider body (501), a timing belt clamp (505) and a timing belt clamp (506). The slider body (501) is provided with an upper roller (502) and a lower roller (503). The upper roller (502) and the lower roller (503) are in rolling contact with the upper and lower surfaces of the slide rail (101) respectively. The slider body (501) is provided with side rollers (504) on both sides. The side rollers (504) are in rolling contact with the sides of the crossbeam (1). The timing belt clamp (505) is fixedly connected to the slider body (501) and located below the inner side of the timing belt (405). The timing belt clamp (506) is pressed on the timing belt (405) and fixedly connected to the timing belt clamp (505).

6. A novel fully automatic safety net for training falls according to claim 5, characterized in that: The slider body (501) is provided with a protective net fixing device (507) for fixed connection with the safety net (7).

7. A novel fully automatic safety net for training as described in claim 1, characterized in that: The wire mesh rod (2) is an aluminum alloy tube, and multiple fixing ports for fixing the safety net (7) are opened on the outer shaft surface.

8. A novel fully automatic safety net for training as described in claim 1, characterized in that: The safety net (7) is made of high-strength nylon and is reinforced with steel wire ropes around its perimeter.

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