A fall protection device detection apparatus

Abstract

The application relates to the technical field of test equipment, and discloses a falling protection device detection equipment, which comprises a detection vertical stand, a lift car is slidably connected to a lifting guide rail, a brake assembly is slidably connected to the lower half of a brake guide rail, a hydraulic buffer is fixedly installed between the bottom of the brake assembly and the bottom wall of the detection vertical stand, energy absorption assemblies are arranged on the left side and the right side below the brake assembly, a suspension assembly is arranged at the top of the detection vertical stand, and a falling release piece is arranged between the top of the lift car and the top wall of the detection vertical stand. In the case that the falling protection piece fails, when the lift car hits the surface of the horizontal plate at a large speed, the horizontal plate and the V-shaped pressing plate move downwards relative to the support, the V-shaped pressing plate pushes the push plate to move towards the brake guide rail, the lift car is decelerated through the friction force between the outer U-shaped plate, the inner U-shaped plate and the brake guide rail, so that the brake structure is supplemented, and the detection vertical stand is protected when the falling protection piece fails.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically to a testing device for fall protection devices. Background Technology

[0002] To prevent elevators from plummeting and injuring passengers during operation, a fall arrestor is typically installed at the bottom of the elevator car. This fall arrestor is triggered when the car descends rapidly. However, after the fall arrestor is manufactured, it needs to be tested to prevent malfunction.

[0003] Chinese Patent CN116413018B, filed on April 18, 2023, discloses a safety lock drop test device. The device includes a frame, a suspended basket movably mounted on the frame, a safety lock mounting base mounted on the basket, a safety rope mounted on the frame, a lifting device for lifting the basket, and a tensioning device for tensioning the safety rope. In the drop test, the safety lock is mounted on the mounting base. When the safety lock is unlocked, the safety rope passes through the lock and is tensioned by the tensioning device. After the lifting device lifts the safety lock and basket to a set height, it releases the safety lock and basket, causing them to fall. During the fall, the safety lock may lock onto the safety rope or fail to trigger its locking mechanism, allowing the safety lock and basket to fall, thus achieving the drop test. This safety lock drop test device uses a tensioning device to tension the safety rope, reducing manual intervention, lowering worker workload, avoiding safety hazards, and ensuring safe testing.

[0004] In this technical solution, the safety lock protects the suspended platform. However, the protection devices for the suspended platform and the elevator car are different. The elevator car cannot stop instantly during the fall prevention process to prevent excessive acceleration during braking, which could cause injury to personnel. The distance required for car detection is relatively long. After the protection device fails, the kinetic energy of the car when it contacts the buffer structure is relatively large. In this technical solution, only the buffer ring and other structures are used for buffer protection, which is difficult to effectively protect the rapidly descending car. Therefore, further improvements are needed. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a fall protection device detection equipment, which has advantages such as good protection effect of the buffer structure, and solves the problem that existing buffer structures are unable to effectively protect the rapidly descending car.

[0007] (II) Technical Solution

[0008] To achieve the desired good protective effect of the aforementioned buffer structure, the present invention provides the following technical solution: a fall protection device testing equipment, comprising a testing frame, a lifting guide rail welded to the rear side of the testing frame, two brake guide rails fixedly installed between the top and bottom walls of the testing frame, the two brake guide rails being distributed left and right; a car slidably connected to the lifting guide rail; a brake assembly slidably connected to the lower half of the brake guide rail, a hydraulic buffer component fixedly installed between the bottom of the brake assembly and the bottom wall of the testing frame, and energy-absorbing components provided on both the left and right sides below the brake assembly; a suspension assembly provided at the top of the testing frame, a descent release component provided between the top of the car and the top wall of the testing frame; a fall protection component fixedly installed at the bottom of the car, and a triggering component provided on the left side of the fall protection component.

[0009] Preferably, the braking assembly includes four guide rods fixedly mounted in a matrix on the bottom wall of the detection stand. A support is slidably connected to each guide rod. A horizontal plate is provided above the support. The horizontal plate is slidably connected to two brake guide rails. A V-shaped pressure plate is fixedly installed at the bottom center of the horizontal plate. An avoidance groove is provided through the center of the support. Two sets of friction brake components are slidably connected to the top of the support. The two sets of friction brake components are respectively attached to both sides of the V-shaped pressure plate.

[0010] Preferably, each set of friction brake components includes a support frame fixedly installed on the top of the support. An outer U-shaped plate and an inner U-shaped plate are slidably connected inside the support frame. The outer U-shaped plate is sleeved on the outside of the inner U-shaped plate, and a brake guide rail passes between the inner U-shaped plate and the outer U-shaped plate. A push plate is provided in the middle of the inner U-shaped plate. The push plate is slidably connected inside the support frame. One end of the push plate is attached to the side of the V-shaped pressure plate, and a spring is fixedly installed between the other end of the push plate and the inner U-shaped plate. A locking tooth is arranged in an array on opposite sides of both ends of the outer U-shaped plate and the inner U-shaped plate. A gear meshes between the outer U-shaped plate and the inner U-shaped plate through the locking tooth, and the gear is rotatably connected to the support.

[0011] Preferably, the hydraulic buffer includes a hydraulic cylinder fixedly installed on the bottom wall of the detection stand, a piston rod slidably connected through the top of the hydraulic cylinder, a piston plate fixedly installed at the bottom end of the piston rod, a limit ring fixedly installed on the inner wall of the upper half of the hydraulic cylinder, a partition plate fixedly installed on the inner wall of the lower half of the hydraulic cylinder, a return pipe connected to the circumferential surface of the hydraulic cylinder, the two ends of the return pipe being located on the upper side of the limit ring and the lower side of the partition plate respectively, and damping flow channels are arrayed on the partition plate.

[0012] Preferably, the damping flow channel includes an array of arc-shaped cavities formed inside the partition plate. The top of the partition plate has an array of inlet holes, and the bottom of the partition plate has an array of outlet holes. The inlet holes and outlet holes are respectively connected to both ends of the arc-shaped cavity. Two rows of flow dividers are fixedly installed on the bottom wall of the arc-shaped cavity, and flow guide protrusions are fixedly arranged on both sides of the arc-shaped cavity.

[0013] Preferably, wedge plates are fixedly installed at the bottom of both ends of the support; the energy absorption assembly includes mounting frames fixedly installed on the left and right sides of the lower half of the detection frame, and two rows of sleeves are fixedly installed on each mounting frame. Inclined steel plates are fixedly arranged on the end of the sleeve facing the inside of the detection frame. A crossbar is inserted into the sleeve. A truncated cone is fixedly installed on the circumferential surface of the crossbar. The truncated cone is attached to the inside of the inclined steel plate. A blocking plate is fixedly installed on the end of the truncated cone away from the middle of the detection frame. The end of the crossbar is attached to the inclined surface of the wedge plate.

[0014] Preferably, the suspension assembly includes two transverse guide rails fixedly installed on the top of the detection frame, a U-shaped slide block slidably connected between the two transverse guide rails, a motor is fixedly installed on the top right end of the U-shaped slide block, a drive shaft is fixedly installed on the output end of the motor, and protrusions are fixedly installed on the top and bottom of the circumferential surface of the drive shaft. A winding wheel is rotatably connected at the center of the top of the detection frame, and the protrusion and the drive shaft are slidably connected through the center of the winding wheel. A steel wire rope is wound on the winding wheel, and a hook is fixedly installed at the end of the steel wire rope. A suspension chain is welded to the top of the car, and the hook is hung on the suspension chain. A second motor is fixedly installed on the top of one of the transverse guide rails, a threaded rod is fixedly installed on the output end of the second motor, and a lug is fixedly installed on the top of the U-shaped slide block, the lug being threadedly connected to the threaded rod.

[0015] Preferably, the top of the detection frame has two through-cut grooves, and the landing release component includes a fixed plate that is slidably connected through the grooves. The fixed plate passes through the grooves and is fixedly installed with a U-shaped slide. Each fixed plate has an array of L-shaped hanging plates fixedly fixed at its bottom, and a pad is fixedly installed on the top of the horizontal part of the L-shaped hanging plate. Two rows of rollers are fixedly installed on the top of the car, and rollers are provided on the top wall of the rollers. The distance between two adjacent mounting seats is greater than twice the width of the L-shaped hanging plate. The landing release component also includes a distance sensor fixedly installed on the top wall of the detection frame.

[0016] Preferably, the fall protection component includes a crossbeam fixedly installed at the bottom of the car, with arched frames welded to the bottom of both ends of the crossbeam. A second support frame is fixedly installed at the bottom of the arched frame, and a brake guide rail passes through the second support frame. Two inclined slides are arranged on the left and right sides inside the second support frame, and a brake plate is slidably connected in each of the inclined slides. A first rotating arm is hinged to the top of each brake plate. A connecting shaft is rotatably connected through the arched frame, and a second protrusion is fixedly installed on the circumferential surface of the connecting shaft. The first rotating arm is slidably connected to the connecting shaft and the second protrusion. An extension plate is fixedly installed at the right end of the connecting shaft, and a transmission rod is hinged between the ends of the two extension plates away from the connecting shaft. The second rotating arm is fixedly installed at the left end of the second protrusion.

[0017] Preferably, the triggering component includes a fixed pulley rotatably connected to the bottom wall of the detection stand, a flywheel rotatably connected to the top of the detection stand, the fixed pulley and the flywheel being connected by an annular steel wire, and the second rotating arm being fixedly installed on the rear half of the annular steel wire; a straight groove is formed in the middle of the inner wall of the flywheel, the straight groove is arranged along the diameter direction of the flywheel, and a counterweight rod is slidably connected to both ends of the straight groove; a tension spring is fixedly installed between the two counterweight rods; a support frame is inserted into the flywheel, and the support frame is fixedly installed on the detection stand. At the top of the frame, the inner wall of the support frame is fixed with an array of blocking blocks; the flywheel is fixedly installed with a shaft at one end facing the protrusion 1, and a protrusion 3 is fixedly installed on the circumferential surface of the shaft; a bushing is sleeved on the outside of the shaft and the protrusion 3; a square column is inserted into the right end of the bushing; the square column is fixedly installed on the left end of the protrusion 1; a sliding rod is fixedly installed on both the front and rear sides of the bushing; an installation ring is fixedly installed on both the front and rear sides of the left end of the protrusion 1; the sliding rod is slidably connected to the installation ring; a spring 2 is sleeved on the outside of the sliding rod; the spring 2 is used to drive the bushing to move to the left.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a fall protection device detection device, which has the following beneficial effects:

[0020] 1. In the event of a fall arrestor failure, the car falls freely. When the car impacts the horizontal plate surface at a high speed, the horizontal plate and the V-shaped pressure plate move downward relative to the support. The V-shaped pressure plate pushes the push plate towards the brake guide rail. This, through the elasticity of spring one, increases the squeezing force between the outer and inner U-shaped plates and the brake guide rail. The friction between the outer and inner U-shaped plates and the brake guide rail decelerates the car. This achieves the purpose of supplementing the braking structure and protecting the testing stand when the fall arrestor fails.

[0021] 2. The fall arrestor detection equipment works as the support follows the car's descent. A wedge plate presses against the crossbar, causing the crossbar to slide along the sleeve. The cone-shaped platform presses against the inclined steel plate and sleeve, deforming them and absorbing the kinetic energy of the car and support. The support pushes the piston rod downwards, causing the piston plate to slide downwards inside the hydraulic cylinder. Hydraulic oil enters the arc-shaped cavity through the inlet and exits through the outlet. Most of the hydraulic oil flows between the two hydraulic cylinders, while a small portion is diverted by two flow dividers, entering the arc-shaped gap and then flowing in the opposite direction between the two flow dividers. This creates convection within the arc-shaped cavity, hindering the flow of hydraulic oil and thus slowing the support's descent speed. This further slows the car's descent speed.

[0022] 3. The fall arrestor detection equipment drives the U-shaped slide to move to the right via a threaded rod, causing the pad and roller to separate, allowing the car to fall freely. As the car's descent speed increases, relative movement occurs between the rotating arm and the annular steel belt, causing the connecting shaft to rotate. The brake plates slide along the inclined slide, clamping the two brake plates onto the brake guide rail. Through the friction between the brake plates and the brake guide rail, the car is decelerated until it comes to a stop. During this process, a distance sensor monitors the distance between the top of the car and the top wall of the detection frame to detect the car's braking distance. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a fall protection device detection equipment proposed in this invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the brake assembly, hydraulic buffer, and energy-absorbing assembly of a fall protection device detection equipment proposed in this invention.

[0025] Figure 3 This is a three-dimensional exploded view of the brake assembly of a fall protection device detection equipment proposed in this invention;

[0026] Figure 4 This is a three-dimensional cross-sectional structural diagram of the hydraulic buffer component of a fall protection device testing equipment proposed in this invention;

[0027] Figure 5 This is a three-dimensional structural diagram of the partition plate in the hydraulic buffer component of a fall protection device detection equipment proposed in this invention;

[0028] Figure 6 This is a schematic diagram of the damping flow channel structure in the hydraulic buffer component of a fall protection device testing equipment proposed in this invention;

[0029] Figure 7 This is a three-dimensional structural diagram of the energy-absorbing component of a fall protection device detection equipment proposed in this invention;

[0030] Figure 8 This is a three-dimensional structural diagram of the suspension assembly and landing release component of a fall protection device detection equipment proposed in this invention;

[0031] Figure 9 This is a three-dimensional structural diagram of the suspension component of a fall protection device detection equipment proposed in this invention;

[0032] Figure 10 This is a three-dimensional structural diagram of the landing release component of a fall protection device detection equipment proposed in this invention;

[0033] Figure 11 This is a three-dimensional structural diagram of the fall protection component of a fall protection device detection equipment proposed in this invention;

[0034] Figure 12 This is a three-dimensional structural diagram of the trigger component of a fall protection device detection equipment proposed in this invention;

[0035] Figure 13 This is a three-dimensional structural diagram of the docking component of a fall protection device testing equipment proposed in this invention;

[0036] Figure 14 This is a three-dimensional structural diagram of the docking component of a fall protection device detection equipment proposed in this invention, viewed from the rear side.

[0037] In the diagram: 100, detection stand; 200, car; 300, brake assembly; 400, hydraulic buffer; 500, energy absorption assembly; 600, suspension assembly; 700, descent release assembly; 800, fall arrestor; 900, trigger assembly;

[0038] 101. Lifting guide rail; 102. Brake guide rail; 103. Slide rail; 201. Suspension chain;

[0039] 301. Guide rod; 302. Support; 303. Horizontal plate; 304. V-shaped pressure plate; 305. Clearance groove; 306. Support frame one; 307. Outer U-shaped plate; 308. Inner U-shaped plate; 309. Push plate; 310. Spring one; 311. Gear; 312. Wedge plate;

[0040] 401. Hydraulic cylinder; 402. Piston rod; 403. Piston plate; 404. Limiting ring; 405. Partition plate; 406. Return pipe; 407. Arc-shaped cavity; 408. Liquid inlet; 409. Liquid outlet; 410. Flow divider; 411. Guide boss;

[0041] 501. Mounting bracket; 502. Sleeve; 503. Inclined steel plate; 504. Crossbar; 505. Frustum; 506. Stop plate;

[0042] 601. Transverse guide rail; 602. U-shaped slide; 603. Motor 1; 604. Drive shaft; 605. Protrusion 1; 606. Rewinding wheel; 607. Hook; 608. Motor 2; 609. Threaded rod; 610. Lug;

[0043] 701. Fixing plate; 702. L-shaped hanging plate; 703. Pad; 704. Mounting base; 705. Roller; 706. Distance sensor;

[0044] 801. Crossbeam; 802. Arched frame; 803. Support frame two; 804. Inclined carriage; 805. Brake plate; 806. Swing arm one; 807. Connecting shaft; 808. Protrusion two; 809. Extension plate; 810. Transmission rod; 811. Swing arm two;

[0045] 901. Fixed pulley; 902. Flywheel; 903. Circular steel wire strip; 904. Straight groove; 905. Counterweight rod; 906. Tension spring; 907. Support frame; 908. Block; 909. Embedded shaft; 910. Raised bar three; 911. Bushing; 912. Square column; 913. Slide rod; 914. Mounting ring; 915. Spring two. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0047] Please see Figure 1 A fall protection device testing device includes a testing frame 100. A lifting guide rail 101 is welded to the rear side of the testing frame 100. Two brake guide rails 102 are fixedly installed between the top and bottom walls of the testing frame 100. A car 200 is slidably connected to the lifting guide rails 101. The brake guide rails 102 are located on the left and right sides of the car 200. A brake assembly 300 is slidably connected to the lower half of the brake guide rails 102. A hydraulic buffer 400 is fixedly installed between the bottom of the brake assembly 300 and the bottom wall of the testing frame 100. Energy-absorbing components 500 are provided on both the left and right sides below the brake assembly 300. A suspension assembly 600 is provided on the top of the testing frame 100. A descent release component 700 is provided between the top of the car 200 and the top wall of the testing frame 100. A fall protection component 800 is fixedly installed at the bottom of the car 200. A trigger component 900 is provided on the left side of the fall protection component 800.

[0048] The car 200 is lifted by the suspension assembly 600 and released by the descent release component 700. Simultaneously, the descent release component 700 monitors the distance between the car 200 and the top wall of the detection frame 100, thereby detecting the braking distance of the car 200 when the fall arrestor 800 is triggered. When the fall arrestor 800 fails, it and the car 200 impact the top of the brake assembly 300, increasing the pressure between the brake assembly 300 and the brake guide rail 102. The brake assembly 300 descends along with the car 200, impacting the energy-absorbing component 500 during descent. The energy-absorbing component 500 absorbs energy, reducing the kinetic energy of the descent of the brake assembly 300 and the car 200. Meanwhile, the hydraulic buffer 400 provides damping during the descent of the car 200 and the brake assembly 300, further cushioning the impact.

[0049] Please see Figures 2-3 The brake assembly 300 includes four guide rods 301 fixedly mounted in a matrix on the bottom wall of the detection stand 100. A support 302 is slidably connected to each guide rod 301. A horizontal plate 303 is positioned above the support 302 and slidably connected to two brake guide rails 102. A V-shaped pressure plate 304 is fixedly mounted at the bottom center of the horizontal plate 303. The left and right sides of the V-shaped pressure plate 304 are inclined surfaces. A clearance groove 305 is formed through the center of the support 302 to allow clearance from the V-shaped pressure plate 304. Two sets of friction brake components are slidably connected to the top of the support 302, and these two sets of friction brake components are respectively attached to both sides of the V-shaped pressure plate 304.

[0050] Each set of friction brake components includes a support frame 306 fixedly mounted on the top of the bracket 302. An outer U-shaped plate 307 and an inner U-shaped plate 308 are slidably connected within the support frame 306. The outer U-shaped plate 307 is fitted over the outer side of the inner U-shaped plate 308. The brake guide rail 102 passes between the inner U-shaped plate 308 and the outer U-shaped plate 307. A push plate 309 is provided in the middle of the inner U-shaped plate 308, slidably connected within the support frame 306. The two push plates 309 are inclined upwards at opposite ends, with one end of the push plate 309 abutting the side of the V-shaped pressure plate 304. A spring 310 is fixedly installed between the other end of the push plate 309 and the inner U-shaped plate 308. Initially, the inner U-shaped plate 308 and the outer U-shaped plate 307 are clamped on the left and right sides of the brake guide rail 102, and the two push plates 309 are supported on the lower half of the V-shaped pressure plate 304.

[0051] Both ends of the outer U-shaped plate 307 and the inner U-shaped plate 308 are provided with arrayed teeth on opposite sides. A gear 311 meshes between the outer U-shaped plate 307 and the inner U-shaped plate 308 through the teeth, and the gear 311 is rotatably connected to the support 302. Thus, through the transmission action of the gear 311, the inner U-shaped plate 308 and the outer U-shaped plate 307 move in opposite directions.

[0052] When the fall arrestor 800 malfunctions, the car 200 and the fall arrestor 800 collide with the cross plate 303, causing the cross plate 303 to move downward relative to the support 302. The V-shaped pressure plate 304 squeezes the two push plates 309, compressing the spring 310, thereby increasing the squeezing force of the inner U-shaped plate 308 and the outer U-shaped plate 307 on the brake guide rail 102. Afterward, the cross plate 303 and the support 302 descend synchronously with the car 200. Through the friction between the outer U-shaped plate 307 and the inner U-shaped plate 308 and the brake guide rail 102, the car 200 is decelerated.

[0053] Please see Figures 4-6 The hydraulic buffer 400 includes a hydraulic cylinder 401 fixedly installed on the bottom wall of the detection stand 100, and the hydraulic cylinder 401 is filled with hydraulic oil. A piston rod 402 is slidably connected through the top of the hydraulic cylinder 401, and the top end of the piston rod 402 is fixedly installed on the bottom of the support 302. A piston plate 403 is fixedly installed at the bottom end of the piston rod 402. A limit ring 404 is fixedly installed on the inner wall of the upper half of the hydraulic cylinder 401, and a partition plate 405 is fixedly installed on the inner wall of the lower half of the hydraulic cylinder 401. A return pipe 406 is connected to the circumference of the hydraulic cylinder 401, with its two ends located above the limit ring 404 and below the partition plate 405, respectively. The limit ring 404 and the partition plate 405 prevent the piston plate 403 from passing over the end of the return pipe 406. Damping channels are arrayed on the partition plate 405. As the piston plate 403 slides inside the hydraulic cylinder 401, it drives the hydraulic oil to flow through the damping channel and the return pipe 406. The damping channel provides resistance to the hydraulic oil, thus buffering the downward movement of the piston rod 402 and the piston plate 403.

[0054] The damping flow channel includes an array of arc-shaped cavities 407 formed inside the partition 405. The top of the partition 405 has an array of inlet holes 408, and the bottom of the partition 405 has an array of outlet holes 409. The inlet holes 408 and outlet holes 409 are respectively connected to both ends of the arc-shaped cavities 407. Two rows of flow dividers 410 are fixedly installed on the bottom wall of the arc-shaped cavities 407, and guide protrusions 411 are fixedly arranged on both side walls of the arc-shaped cavities 407. An arc-shaped gap is formed between the flow dividers 410 and the guide protrusions 411.

[0055] When the piston plate 403 descends, the hydraulic oil passes through the inlet hole 408 into the arc-shaped cavity 407 and is discharged through the outlet hole 409. Most of the hydraulic oil flows between the two hydraulic cylinders 401, and a small portion of the hydraulic oil is diverted by the two diverting plates 410, enters the arc-shaped gap, and then flows in the opposite direction between the two diverting plates 410, thereby forming convection inside the arc-shaped cavity 407 and hindering the flow of hydraulic oil.

[0056] After the test is completed, the support 302 can be lifted upward by a jack or other equipment, so that the piston plate 403 slides upward inside the hydraulic cylinder 401. The hydraulic oil enters the arc-shaped cavity 407 through the outlet hole 409 and is then discharged through the inlet hole 408. The hydraulic oil flows through the middle of the arc-shaped cavity 407 under the guidance of the guide boss 411 and the flow divider 410. The hydraulic oil experiences less resistance, allowing the support 302 to be quickly reset.

[0057] Please see Figure 3 and Figure 7 Wedge plates 312 are fixedly installed at the bottom of both ends of the support 302. The energy absorption assembly 500 includes mounting brackets 501 fixedly installed on the left and right sides of the lower half of the detection stand 100. Each mounting bracket 501 has two rows of sleeves 502 fixedly installed. Inclined steel plates 503 are fixedly arranged at the end of the sleeves 502 facing the inside of the detection stand 100. A crossbar 504 is inserted into the sleeve 502. A truncated cone 505 is fixedly installed on the circumferential surface of the crossbar 504. The truncated cone 505 is attached to the inside of the inclined steel plates 503. A blocking plate 506 is fixedly installed at the end of the truncated cone 505 away from the middle of the detection stand 100. The end of the crossbar 504 is attached to the inclined surface of the wedge plate 312. Specifically, the mounting brackets 501 are fixed to the detection stand 100 by bolts, so that the energy absorption assembly 500 can be replaced. Initially, the wedge plate 312 is supported by the uppermost crossbar 504, keeping the support 302 at a high position. When the support 302 descends rapidly after being impacted by the car 200, the wedge plate 312 compresses the crossbar 504, causing the crossbar 504 to slide within the sleeve 502. The cone 505 compresses the inclined steel plate 503, causing the inclined steel plate 503 and the sleeve 502 to deform, thereby consuming the kinetic energy of the support 302's descent.

[0058] Please see Figures 8-9The suspension assembly 600 includes two transverse guide rails 601 fixedly installed on the top of the detection frame 100. A U-shaped slide block 602 is slidably connected between the two transverse guide rails 601. A motor 603 is fixedly installed on the top right end of the U-shaped slide block 602. A drive shaft 604 is fixedly installed on the output end of the motor 603. A convex strip 605 is fixedly installed on the top and bottom of the circumferential surface of the drive shaft 604. A winding wheel 606 is rotatably connected at the center of the top of the detection frame 100. The convex strip 605 and the drive shaft 604 are slidably connected through the center of the winding wheel 606. A steel wire rope is wound on the winding wheel 606. A hook 607 is fixedly installed at the end of the steel wire rope. A suspension chain 201 is welded to the top of the car 200. The hook 607 is hung on the suspension chain 201. One of the transverse guide rails 601 has a motor 608 fixedly mounted on its top. A threaded rod 609 is fixedly mounted on the output end of the motor 608. A lug 610 is fixedly mounted on the top of the U-shaped slide 602, and the lug 610 is threadedly connected to the threaded rod 609. The motor 608 drives the threaded rod 609 to rotate, causing the lug 610 and the U-shaped slide 602 to slide along the transverse guide rail 601, thereby causing the first rib 605 and the drive shaft 604 to slide relative to the take-up wheel 606. During this process, the motor 603 drives the drive shaft 604 to rotate, which in turn drives the take-up wheel 606 to rotate.

[0059] Please see Figure 10 The top of the inspection stand 100 has two sliding grooves 103. The drop release component 700 includes a fixed plate 701 that is slidably connected through the sliding groove 103. The fixed plate 701 passes through the sliding groove 103 and is fixedly installed with the U-shaped slide 602, so that when the U-shaped slide 602 slides along the transverse guide rail 601, it can drive the fixed plate 701 to move synchronously.

[0060] Each fixed plate 701 has an L-shaped hanging plate 702 fixedly arranged at its bottom, and a pad 703 is fixedly installed on the top of the horizontal part of the L-shaped hanging plate 702. Two rows of rollers 705 are fixedly installed on the top of the car 200, with rollers 705 mounted on their top walls. The distance between two adjacent mounting seats 704 is greater than twice the width of the L-shaped hanging plate 702. During the movement of the fixed plate 701, the pad 703 can move to the bottom of the rollers 705 to support them, thus suspending the car 200 at the bottom of the detection stand 100 via the lowering release component 700. Specifically, the top of the pad 703 has an arc-shaped surface, allowing the rollers 705 to be stably positioned on top of the pad 703.

[0061] The landing release device 700 also includes a distance sensor 706 fixedly installed on the top wall of the detection stand 100, which monitors the distance between the top of the car 200 and the top wall of the detection stand 100 in real time.

[0062] Please see Figures 11-12The fall arrestor 800 includes a crossbeam 801 fixedly installed at the bottom of the car 200. Arched frames 802 are welded to the bottom of both ends of the crossbeam 801. A second support frame 803 is fixedly installed at the bottom of the arched frame 802. A brake guide rail 102 passes through the second support frame 803. Two inclined slides 804 are symmetrically distributed within the second support frame 803. A brake plate 805 is slidably connected within each inclined slide 804. The brake plate 805 is in the shape of a right-angled trapezoid. A first rotating arm 806 is hinged to the top of each brake plate 805. A connecting shaft 807 is rotatably connected through the arched frame 802. A second protrusion 808 is fixedly installed on the circumferential surface of the connecting shaft 807. The first rotating arm 806 is slidably connected to the connecting shaft 807 and the second protrusion 808. An extension plate 809 is fixedly installed on the right end of the connecting shaft 807. A transmission rod 810 is hinged between the ends of the two extension plates 809 away from the connecting shaft 807. Initially, the transmission rod 810 is inclined and is connected to the bottom end of one extension plate 809 and the top end of the other extension plate 809. A rotating arm 811 is fixedly installed on the left end of the second protrusion 808. When the car 200 descends rapidly, the rotating arm 811 is deflected by the trigger assembly 900, which drives the connecting shaft 807 and the second protrusion 808 to rotate, thereby driving the first rotating arm 806 to deflect upward. The brake plate 805 moves upward, and under the guidance of the inclined slide 804, the two brake plates 805 move closer to each other and press against the surface of the brake guide rail 102. As the two brake plates 805 move closer to each other, the first rotating arm 806 follows the deflection of the connecting shaft 807, and the two rotating arms 806 move closer to each other along the first rotating arm 806. Through the transmission action of the extension plate 809 and the transmission rod 810, the two connecting shafts 807 are driven to rotate in opposite directions.

[0063] Please see Figures 12-14The triggering component 900 includes a fixed pulley 901 rotatably connected to the bottom wall of the detection stand 100, and a flywheel 902 rotatably connected to the top of the detection stand 100. The fixed pulley 901 and the flywheel 902 are connected by an annular steel wire 903. A rotating arm 811 is fixedly installed on the rear half of the annular steel wire 903. A straight groove 904 is formed in the middle of the inner wall of the flywheel 902. The straight groove 904 is set along the diameter direction of the flywheel 902. A counterweight rod 905 is slidably connected to both ends of the straight groove 904. A tension spring 906 is fixedly installed between the two counterweight rods 905. A support frame 907 is inserted into the flywheel 902. The support frame 907 is fixedly installed on the top of the detection stand 100. Blocks 908 are fixedly arranged in an array on the inner wall of the support frame 907. A shaft 909 is fixedly installed on the end of the flywheel 902 facing the protrusion 605. A connecting piece is provided between the embedded shaft 909 and the protruding strip 605. When the protruding strip 605 rotates, it drives the winding wheel 606 to rotate, which in turn winds up the wire rope and drives the car 200 to rise. The connecting piece enables the flywheel 902 to rotate synchronously, thereby making the annular steel wire rope 903 move synchronously with the wire rope. The annular steel wire rope 903 and the rotating arm 811 remain relatively stationary.

[0064] The docking part separates from the embedded shaft 909, and the car 200 is released by the descent release part 700, causing the car 200 to descend rapidly. The rotating arm 811 can drive the annular steel wire 903 to move, and drive the flywheel 902 to rotate rapidly. The counterweight rod 905 moves away from the center of the flywheel 902 and gets stuck between the blocking block 908 and the side wall of the support frame 907, making it difficult for the flywheel 902 to continue to rotate. This causes the movement of the annular steel wire 903 and the movement of the rotating arm 811 to become asynchronous. The rotating arm 811 deflects upward, thereby triggering the brake plate 805 to press against the brake guide rail 102.

[0065] The mating parts include a protruding strip 910 fixedly installed on the circumferential surface of the embedded shaft 909. A bushing 911 is sleeved on the outside of the embedded shaft 909 and the protruding strip 910. A square post 912 is inserted into the right end of the bushing 911. The square post 912 is fixedly installed on the left end of the protruding strip 605. A sliding rod 913 is fixedly installed on both the front and rear sides of the bushing 911. An installation ring 914 is fixedly installed on both the front and rear sides of the left end of the protruding strip 605. The sliding rod 913 is slidably connected to the installation ring 914. A spring 915 is sleeved on the outside of the sliding rod 913. The spring 915 is used to drive the bushing 911 to move to the left. When protrusion 605 moves to the left, if protrusion 910 is not aligned with the left end of sleeve 911, sleeve 911 will fit against the right end of embedded shaft 909. Spring 915 will be compressed and contracted, and through the slow rotation of protrusion 605, when the left end of sleeve 911 aligns with protrusion 910, the elastic action of spring 915 will cause sleeve 911 to be fitted onto the outside of embedded shaft 909 and protrusion 910. At this time, embedded shaft 909 can rotate together with protrusion 605.

[0066] In use, the threaded rod 609 is driven to rotate by the second motor 608, which drives the U-shaped slide 602 and the lug 610 to move to the left along the transverse guide rail 601, so that the bushing 911 is fitted on the outside of the embedded shaft 909. At this time, the L-shaped hanging plate 702 and the mounting base 704 are offset from each other in the left and right directions. Then the hook 607 is hung on the suspension chain 201, and the drive shaft 604 is driven to rotate by the first motor 603, which drives the winding wheel 606 to wind up the wire rope, so that the car 200 rises continuously until the roller 705 is higher than the top of the pad 703.

[0067] Then, the threaded rod 609 is driven to rotate by the motor 608, which drives the U-shaped slide 602 to move to the right, so that the pad 703 moves directly under the roller 705. After that, the drive shaft 604 drives the winding wheel 606 to rotate in the opposite direction, so that the car 200 descends a short distance. After the roller 705 is in contact with the top of the pad 703, the car 200 continues to descend, so that the hook 607 moves downward relative to the suspension chain 201, so that the hook 607 separates from the suspension chain 201.

[0068] Then, the U-shaped slide block 602 is driven to move to the right by the threaded rod 609, so that the pad 703 and the roller 705 are misaligned, allowing the car 200 to fall freely. As the descent speed of the car 200 increases, the relative movement between the rotating arm 811 and the annular steel wire 903 is generated, causing the connecting shaft 807 to rotate. The brake plate 805 slides along the inclined slide 804, so that the two brake plates 805 are clamped on the brake guide rail 102. Through the friction between the brake plate 805 and the brake guide rail 102, the car 200 is decelerated until it stops. During this process, the distance sensor 706 monitors the distance between the top of the car 200 and the top wall of the detection frame 100, and detects the braking distance of the car 200.

[0069] In the event of a failure of the fall arrestor 800, the car 200 falls freely. When the car 200 impacts the surface of the horizontal plate 303 at a high speed, the horizontal plate 303 and the V-shaped pressure plate 304 move downward relative to the support 302. The V-shaped pressure plate 304 pushes the push plate 309 toward the brake guide rail 102. Thus, through the elasticity of the spring 310, the squeezing force between the outer U-shaped plate 307 and the inner U-shaped plate 308 and the brake guide rail 102 increases. Through the friction between the outer U-shaped plate 307, the inner U-shaped plate 308 and the brake guide rail 102, the car 200 is decelerated.

[0070] As the support 302 descends with the car 200, the wedge plate 312 compresses the crossbar 504, the crossbar 504 slides along the sleeve 502, and the cone 505 compresses the inclined steel plate 503 and the sleeve 502, causing the sleeve 502 and the inclined steel plate 503 to deform and absorb the kinetic energy of the car 200 and the support 302.

[0071] The piston rod 402 is pushed downward by the support 302, causing the piston plate 403 to slide downward inside the hydraulic cylinder 401. The hydraulic oil passes through the inlet hole 408 into the arc-shaped cavity 407 and is discharged through the outlet hole 409. Most of the hydraulic oil flows between the two hydraulic cylinders 401, and a small portion of the hydraulic oil is diverted by the two diverting plates 410, enters the arc-shaped gap, and then flows in the opposite direction between the two diverting plates 410, thereby forming convection inside the arc-shaped cavity 407, which hinders the flow of hydraulic oil and slows down the descent speed of the support 302.

[0072] 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 fall protection device testing equipment, comprising a testing stand (100), characterized in that: The detection stand (100) is welded to the rear side with a lifting guide rail (101), and two brake guide rails (102) are fixedly installed between the top wall and the bottom wall of the detection stand (100). The two brake guide rails (102) are distributed left and right. A car (200) is slidably connected to the lifting guide rail (101). The brake guide rail (102) is slidably connected to the lower half of the brake assembly (300). A hydraulic buffer (400) is fixedly installed between the bottom of the brake assembly (300) and the bottom wall of the detection stand (100). Energy absorption components (500) are provided on both the left and right sides below the brake assembly (300). The top of the detection stand (100) is provided with a suspension assembly (600), and a descent release component (700) is provided between the top of the car (200) and the top wall of the detection stand (100). A fall protection device (800) is fixedly installed at the bottom of the car (200), and a trigger component (900) is provided on the left side of the fall protection device (800). The brake assembly (300) includes four guide rods (301) fixedly mounted in a matrix on the bottom wall of the detection stand (100). A support (302) is slidably connected to the guide rods (301). A horizontal plate (303) is provided above the support (302). The horizontal plate (303) is slidably connected to two brake guide rails (102). A V-shaped pressure plate (304) is fixedly installed at the bottom center of the horizontal plate (303). An avoidance groove (305) is provided through the center of the support (302). The top of the support (302) is slidably connected to two sets of friction brake components, which are respectively attached to both sides of the V-shaped pressure plate (304); Each set of friction brake components includes a support frame (306) fixedly installed on the top of the bracket (302). The support frame (306) has an outer U-shaped plate (307) and an inner U-shaped plate (308) slidably connected inside. The outer U-shaped plate (307) is sleeved on the outside of the inner U-shaped plate (308), and the brake guide rail (102) passes through the inner U-shaped plate (308) and the outer U-shaped plate (307). A push plate (309) is provided in the middle of the inner U-shaped plate (308). The push plate (309) is slidably connected in the support frame (306). One end of the push plate (309) is attached to the side of the V-shaped pressure plate (304). A spring (310) is fixedly installed between the other end of the push plate (309) and the inner U-shaped plate (308). Both ends of the outer U-shaped plate (307) and the inner U-shaped plate (308) are provided with a toothed array on opposite sides. A gear (311) meshes between the outer U-shaped plate (307) and the inner U-shaped plate (308) through the toothed array. The gear (311) is rotatably connected to the support (302).

2. The fall protection device testing equipment according to claim 1, characterized in that: The hydraulic buffer (400) includes a hydraulic cylinder (401) fixedly installed on the bottom wall of the detection stand (100). A piston rod (402) is slidably connected through the top of the hydraulic cylinder (401). A piston plate (403) is fixedly installed at the bottom end of the piston rod (402). A limit ring (404) is fixedly installed on the inner wall of the upper half of the hydraulic cylinder (401). A partition plate (405) is fixedly installed on the inner wall of the lower half of the hydraulic cylinder (401). A return pipe (406) is connected to the circumferential surface of the hydraulic cylinder (401). The two ends of the return pipe (406) are located on the upper side of the limit ring (404) and the lower side of the partition plate (405), respectively. Damping channels are arrayed on the partition plate (405).

3. The fall protection device testing equipment according to claim 2, characterized in that: The damping channel includes an array of arc-shaped cavities (407) inside the partition (405). The top of the partition (405) is provided with an array of liquid inlet holes (408), and the bottom of the partition (405) is provided with an array of liquid outlet holes (409). The liquid inlet holes (408) and the liquid outlet holes (409) are respectively connected to both ends of the arc-shaped cavity (407). Two rows of diverter plates (410) are fixedly installed on the bottom wall of the arc-shaped cavity (407), and guide bosses (411) are fixedly arranged on both sides of the arc-shaped cavity (407).

4. The fall protection device testing equipment according to claim 1, characterized in that: Wedge plates (312) are fixedly installed at the bottom of both the left and right ends of the support (302); The energy-absorbing assembly (500) includes mounting brackets (501) fixedly installed on the left and right sides of the lower half of the detection stand (100). Each mounting bracket (501) is fixedly installed with two rows of sleeves (502). Inclined steel plates (503) are fixedly arranged on one end of the sleeves (502) facing the inside of the detection stand (100). A crossbar (504) is inserted into the sleeve (502). A frustum (505) is fixedly installed on the circumferential surface of the crossbar (504). The frustum (505) is attached to the inside of the inclined steel plate (503). A blocking plate (506) is fixedly installed on one end of the frustum (505) away from the middle of the detection stand (100). The end of the crossbar (504) is attached to the inclined surface of the wedge plate (312).

5. The fall protection device testing equipment according to claim 1, characterized in that: The suspension assembly (600) includes two transverse guide rails (601) fixedly installed on the top of the detection frame (100). A U-shaped slide (602) is slidably connected between the two transverse guide rails (601). A motor (603) is fixedly installed on the top right end of the U-shaped slide (602). A drive shaft (604) is fixedly installed at the output end of the motor (603). A protrusion (605) is fixedly installed on the top and bottom of the circumferential surface of the drive shaft (604). A winding wheel (606) is rotatably connected at the center of the top of the detection frame (100). The protrusion (605) and the drive shaft (604) are slidably connected through the center of the winding wheel (606). A wire rope is wound on the winding wheel (606). A hook (607) is fixedly installed at the end of the wire rope. A suspension chain (201) is welded to the top of the car (200). The hook (607) is hung on the suspension chain (201). One of the transverse guide rails (601) is fixedly mounted with a second motor (608) at its top. A threaded rod (609) is fixedly mounted at the output end of the second motor (608). A lug (610) is fixedly mounted on the top of the U-shaped slide (602). The lug (610) is threadedly connected to the threaded rod (609).

6. The fall protection device testing equipment according to claim 5, characterized in that: The top of the detection stand (100) has two sliding grooves (103). The landing release component (700) includes a fixed plate (701) that is slidably connected through the sliding groove (103). The fixed plate (701) passes through the sliding groove (103) and is fixedly installed with a U-shaped slide (602). Each fixed plate (701) has an array of L-shaped hanging plates (702) fixedly fixed at its bottom. The top of the horizontal part of the L-shaped hanging plate (702) is fixedly installed with a pad (703). The top of the car (200) is fixedly equipped with two rows of rollers (705), and the rollers (705) are provided on the top wall of the rollers (705). The distance between two adjacent mounting seats (704) is greater than twice the width of the L-shaped hanging plate (702). The landing release device (700) also includes a distance sensor (706) fixedly mounted on the top wall of the detection stand (100).

7. The fall protection device testing equipment according to claim 5, characterized in that: The fall protection component (800) includes a crossbeam (801) fixedly installed at the bottom of the car (200). Arched frames (802) are welded to the bottom of both ends of the crossbeam (801). A second support frame (803) is fixedly installed at the bottom of the arched frame (802). A brake guide rail (102) passes through the second support frame (803). Two inclined slides (804) are provided in the second support frame (803) and are distributed on the left and right. A brake plate (805) is slidably connected in each of the inclined slides (804). A rotating arm (806) is hinged to the top of each brake plate (805). A connecting shaft (807) is rotatably connected through the arched frame (802). A second protrusion (808) is fixedly installed on the circumferential surface of the connecting shaft (807). The first rotating arm (806) is slidably connected to the connecting shaft (807) and the second protrusion (808). An extension plate (809) is fixedly installed on the right end of the connecting shaft (807), and a transmission rod (810) is hinged between the ends of the two extension plates (809) away from the connecting shaft (807). A rotating arm (811) is fixedly installed on the left end of the second protrusion (808).

8. The fall protection device testing equipment according to claim 7, characterized in that: The triggering assembly (900) includes a fixed pulley (901) rotatably connected to the bottom wall of the detection stand (100), a flywheel (902) rotatably connected to the top of the detection stand (100), the fixed pulley (901) and the flywheel (902) being connected by an annular steel wire (903), and the second rotating arm (811) being fixedly installed on the rear half of the annular steel wire (903); A straight groove (904) is provided in the middle of the inner wall of the flywheel (902). The straight groove (904) is arranged along the diameter direction of the flywheel (902). A counterweight rod (905) is slidably connected to both ends of the straight groove (904). A tension spring (906) is fixedly installed between the two counterweight rods (905). A support frame (907) is inserted into the flywheel (902). The support frame (907) is fixedly installed on the top of the detection stand (100). Blocks (908) are fixedly arranged in an array on the inner wall of the support frame (907). The flywheel (902) is fixedly mounted with a shaft (909) at one end facing the first protrusion (605). The third protrusion (910) is fixedly mounted on the circumferential surface of the shaft (909). A bushing (911) is sleeved on the outside of the shaft (909) and the third protrusion (910). A square column (912) is inserted into the right end of the bushing (911). The square column (912) is fixedly mounted on the left end of the first protrusion (605). A slide rod (913) is fixedly mounted on both the front and rear sides of the bushing (911). An installation ring (914) is fixedly mounted on both the front and rear sides of the left end of the first protrusion (605). The slide rod (913) is slidably connected to the installation ring (914). A spring (915) is sleeved on the outside of the slide rod (913). The spring (915) is used to drive the bushing (911) to move to the left.

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