Safety net impact performance detection device

Abstract

The invention discloses a safety net impact performance detection device, and relates to the technical field of safety net test equipment. The safety net impact performance detection device comprises a base, a first linear motor is fixedly connected to the top of the base, an outer frame is fixedly connected to the top of the base, an impact mechanism is arranged at the top of the first linear motor, and the impact mechanism comprises an inner frame fixedly connected to the top of a rotor of the first linear motor; a test ball is rotationally connected into the disc frame through a reel and a steel cable, and a lubricating protection assembly is arranged on the front face of the disc frame. According to the safety net impact performance detection device, by arranging the lubricating protection assembly, the fixing mechanism and the cleaning and throwing assembly, adverse effects of fine fibers and other impurities on the operation process of the device are reduced, the smoothness of steel cable movement is guaranteed, net materials are stably fixed through the device, and the detection reliability of the device is improved in an auxiliary mode.

Description

Technical Field

[0001] This invention relates to the field of safety net testing equipment technology, specifically a safety net impact performance testing device. Background Technology

[0002] Safety nets are mesh protective facilities used to prevent people or objects from falling. They consist of the net body, edge ropes, tie ropes, reinforcing ropes, etc., and have sufficient strength and cushioning performance. Their core functions include intercepting falls, dispersing impacts, and flame retardancy and dust prevention. According to the installation method, they can be divided into flat nets and vertical nets. When the test involves impact performance, the safety net must be tensioned and fixed according to the actual use state to simulate the real stress environment.

[0003] Patent application CN214408391U discloses a safety net inspection device for construction, including a housing, a rotating rod, a square rod, and two sleeves. The upper inner wall of the housing is fixedly provided with three fixing plates. The rod wall of the rotating rod is wound with a pull rope through a winding roller. The lower end of the pull rope is fixedly provided with an iron ball. The rod wall of the square rod is movably sleeved with the inner walls of the two sleeves respectively. The left end of the square rod is fixedly sleeved with a first circular plate and the right end of the square rod is movably sleeved with a second circular plate. The left inner side wall of the housing is fixedly provided with a spraying mechanism. The left and right inner side walls of the housing are both fixedly provided with clamping devices.

[0004] The safety net testing equipment provided by this patent may experience jamming during the long-term use of the iron ball, which may result in the iron ball actually exerting less impact force on the safety net being tested than the required impact force, affecting the accuracy of the test results and ultimately leading to a decline in product quality control. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a safety net impact performance testing device to solve the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a safety net impact performance testing device, comprising a base, a first linear motor fixedly connected to the top of the base, an outer frame fixedly connected to the top of the base, a control box fixedly connected to the left side of the outer frame, an impact mechanism provided on the top of the first linear motor, the impact mechanism comprising an inner frame fixedly connected to the top of the first linear motor rotor, an iron ball winch provided at the bottom of the inner frame, the iron ball winch comprising a disc frame fixedly connected to the bottom of the U-shaped linear motor rotor, a test ball rotatably connected inside the disc frame via a winch and a steel cable, the test ball being used to test the impact resistance performance of the safety net by impacting it through free fall motion, and a lubrication protection component provided on the front of the disc frame;

[0007] The lubrication protection component includes:

[0008] A dust cover is fixedly connected to the outer surface of the tray frame. A rectangular through hole is provided at the bottom of the dust cover. The dust cover is used to prevent small impurities and fibers from adhering to the surface of the steel cable.

[0009] An oil drain pipe is inserted into the right side of the dust cover. The right side of the oil drain pipe is connected to an external oil pump. The oil drain pipe is used to drain lubricating oil.

[0010] The oil distribution comb is fixedly connected inside the dust cover. The cross-section of the oil distribution comb is S-shaped, and the top cross-section of the oil distribution comb is W-shaped. The oil distribution comb is located at the bottom of the oil drain pipe and is used to divert the lubricating oil discharged from the oil drain pipe.

[0011] Preferably, the bottom of the inner frame is fixedly connected to an iron ball winch via a U-shaped linear motor. A clutch shaft is slidably connected to the left side of the test ball winch. The clutch shaft includes a gear shaft, the right side of which is slidably connected to the left side of the test ball winch. A slide plate is rotatably connected to the outer surface of the gear shaft. The slide plate is slidably connected to the left side of the disc frame via a push-pull electromagnet. A circular blind hole is provided on the left side of the gear shaft, and a motor is fixedly connected to the gear shaft through the circular blind hole. The clutch shaft is used to release and retrieve the test ball. A speed measuring frame is provided on the inner side of the outer surface of the inner frame. The speed measuring frame includes four photoelectric sensors fixedly connected to the inner side of the outer surface of the inner frame. The number of photoelectric sensors is two, and in each group, one is close to the top of the inner frame and the other is close to the bottom of the inner frame. The photoelectric sensors are electrically connected to the control box via wires.

[0012] Preferably, dustproof nets are fixedly connected to both the front and back of the dust cover, and the iron ball of the test ball is located at the bottom of the dust cover.

[0013] Preferably, a steel cable sleeve is slidably connected to the surface of the steel cable of the test ball. Slippers are fixedly connected to both the front and back of the steel cable sleeve. The cross-section of the slippers is C-shaped. A roller is rotatably connected to the inner side of the outer surface of the slippers. The inner side of the outer surface of the slippers is slidably connected to a rectangular through hole at the bottom of the dust cover. An oil scraper is fixedly connected to the bottom of the slippers. The cross-section of the oil scraper is barbed. The oil scraper is used to scrape off the lubricating oil on the surface of the steel cable when the iron ball of the test ball is retracted.

[0014] Preferably, the base is provided with a fixing mechanism at the top, the fixing mechanism including a mounting box fixedly connected to the top of the base, the bottom of the mounting box having a rectangular through hole for timely drainage of water from simulated rain spray, a swing clamping plate provided on the right side of the inner wall of the mounting box, the swing clamping plate including a swing body rotatably connected to the right side of the inner wall of the mounting box, the swing body having a C-shaped cross-section, and a pressure plate slidably connected to the top of the inner wall of the swing body via a hydraulic cylinder, the swing clamping plate being used to fix the end of the safety net.

[0015] Preferably, a toothed plate is fixedly connected to the bottom of the inner wall of the swing body, and a distance measuring sensor is fixedly connected to the bottom of the inner wall of the mounting box. The distance measuring sensor is located at the bottom of the swing body and is a laser distance measuring sensor.

[0016] Preferably, a fixing roller is provided on the front side of the inner wall of the mounting box. The fixing roller includes a roller body rotatably connected to the front side of the inner wall of the mounting box. A fixing plate is fixedly connected to the top of the roller body by bolts. A motor is fixedly connected to the front side of the roller body. The fixing plate is used to cooperate with the roller body to fix the end of the safety net.

[0017] Preferably, a simulation mechanism is provided on the top of the outer frame. The simulation mechanism includes a spray plate fixedly connected to the top of the outer frame. A circular through hole is opened at the bottom of the spray plate, and the circular through hole at the bottom of the spray plate communicates with the top of the spray plate. The spray plate is used to spray water to simulate rain and settle floating fine impurities during testing. The spray plate is located on the top of the inner frame, and a vibration motor is fixedly connected to the top of the spray plate. A filter tank is connected to the top of the spray plate.

[0018] Preferably, a cleaning and slinging assembly is provided at the bottom of the spray plate. The cleaning and slinging assembly includes a mounting sleeve that is fixedly connected to the bottom of the spray plate by a motor. Hot scraper strips are fixedly connected to both the left and right sides of the mounting sleeve. The hot scraper strips have a Z-shaped cross-section. A stabilizing ring is fixedly connected between the hot scraper strips. Heating wires are embedded inside the hot scraper strips and the stabilizing ring.

[0019] This invention provides a device for testing the impact performance of safety nets. It has the following advantages:

[0020] 1. This safety net impact performance testing device effectively solves the problem of insufficient impact force due to the iron ball getting stuck during fall by innovatively combining the lubrication protection components and the clutch mechanism. The dust cover and oil distribution comb work together to block fiber debris while achieving uniform coverage of lubricating oil through diversion. During the test ball recovery process, the oil scraper works with the steel cable to remove residual oil stains on the surface. At the same time, the high-frequency vibration of the eccentric wheel prevents impurities from adhering and getting stuck, ensuring the smoothness of the steel cable movement and improving the testing reliability of the device.

[0021] 2. This safety net impact performance testing device, through the setting of a fixing mechanism, utilizes a hydraulically driven swing clamping plate in conjunction with a toothed plate structure to achieve stable fixing of the net material. The motor-driven winding roller, in conjunction with a laser rangefinder and a swinging body, monitors the net surface tension in real time and automatically adjusts it. When the safety net is impacted, the device uses the displacement data of the clamping plate to help determine the degree of net deformation, overcoming the defects of traditional rigid fixing that is prone to loosening and improving the reliability of testing.

[0022] 3. This safety net impact performance testing device, by setting up a simulation mechanism, uses a filter tank and a vibration motor to ensure stable water quality and avoid nozzle clogging. The rotating hot scraper, together with the spray plate, cleans scale while optimizing the distribution of spray water through centrifugal force, improving the uniformity of water spray. The heating wire, combined with the Z-shaped scraper, improves the cleaning effect on impurities and further enhances the reliability of the device.

[0023] 4. This safety net impact performance testing device improves the accuracy of the impact performance testing process through the coordinated design of the impact mechanism and the speed measuring frame. At the same time, it enables the device to assist in judging the validity of the test results. Through the cooperation of the disc frame and the clutch shaft, it realizes the automatic control of the movement state of the iron ball, improves the response speed of the device, reduces the probability of steel cable jamming, and thus reduces the error of manual observation and judgment, thereby improving the reliability of the device's test results. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram showing the positional relationship between the outer frame and the inner frame of the present invention;

[0026] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the diagram;

[0027] Figure 4 This is a schematic diagram of the overall structure of the iron ball winch of the present invention;

[0028] Figure 5 This is a schematic diagram showing the positional relationship between the disc frame and the clutch shaft of the present invention;

[0029] Figure 6 This is a cross-sectional schematic diagram of the overall structure of the clutch shaft of the present invention;

[0030] Figure 7 This is a schematic diagram showing the positional relationship between the steel cable sleeve and the sliding claw of the present invention;

[0031] Figure 8 This is a cross-sectional schematic diagram showing the positional relationship between the steel cable sleeve and the oil scraper cover of the present invention;

[0032] Figure 9 This is a schematic diagram showing the positional relationship between the mounting box and the inner frame of the present invention;

[0033] Figure 10 This is a schematic diagram of the overall structure of the swing clamp of the present invention;

[0034] Figure 11 For the present invention Figure 1 Enlarged schematic diagram of the structure at point B in the diagram;

[0035] Figure 12 This is a schematic diagram showing the positional relationship between the spray disc and the cleaning assembly of the present invention;

[0036] Figure 13 This is a schematic diagram showing the positional relationship between the outer frame and the spray plate of the present invention;

[0037] Figure 14 This is a cross-sectional schematic diagram of the internal structure of the spray disc of the present invention.

[0038] In the diagram: 1. Base; 2. First linear motor; 3. Outer frame; 4. Impact mechanism; 41. Inner frame; 42. Iron ball winch; 421. Disc frame; 422. Test ball; 423. Clutch shaft; 424. Eccentric wheel; 43. Speed ​​measuring frame; 44. Lubrication protection assembly; 441. Dust cover; 442. Oil drain pipe; 443. Oil distribution comb; 444. Steel cable sleeve; 445. Slipper; 446. Oil scraper cover; 5. Fixing mechanism; 51. Mounting box; 52. Swing clamp; 521. Swing body; 522. Pressure plate; 523. Distance sensor; 53. Fixed roller; 531. Roller body; 532. Fixing plate; 6. Simulation mechanism; 61. Spray disc; 62. Cleaning assembly; 621. Mounting sleeve; 622. Hot scraper; 623. Stabilizing ring; 63. Vibration motor; 64. Filter tank; 7. Control box. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0041] Example 1

[0042] Please see Figure 1-8 The present invention provides a technical solution: a safety net impact performance testing device, including a base 1, a first linear motor 2 fixedly connected to the top of the base 1, an outer frame 3 fixedly connected to the top of the base 1, and a control box 7 fixedly connected to the left side of the outer frame 3;

[0043] The first linear motor 2 is equipped with an impact mechanism 4 at its top. The impact mechanism 4 includes an inner frame 41 fixedly connected to the top of the mover of the first linear motor 2. A ball winch 42 is fixedly connected to the bottom of the inner frame 41 via a U-shaped linear motor. The ball winch 42 includes a disc frame 421 fixedly connected to the bottom of the mover of the U-shaped linear motor. A test ball 422 is rotatably connected inside the disc frame 421 via a winch and a steel cable. The test ball 422 is used to test the impact resistance of the safety net by impacting it with free-fall motion. The test ball 422 has a winch... A clutch shaft 423 is slidably connected on the left side. The clutch shaft 423 includes a gear shaft. The right side of the gear shaft is slidably connected to the left side of the test ball 422 winch. A slide plate is rotatably connected to the outer surface of the gear shaft. The slide plate is slidably connected to the left side of the disc frame 421 through a push-pull electromagnet. A circular blind hole is opened on the left side of the gear shaft. A motor is fixedly connected to the gear shaft through the circular blind hole. The clutch shaft 423 is used to realize the release and retrieval of the test ball 422. An eccentric wheel 424 is meshed with a gear on the right side of the test ball 422 winch. The eccentric wheel is rotatably connected to the right side of the disc frame 421.

[0044] A speed measuring frame 43 is provided on the inner side of the outer surface of the inner frame 41. The speed measuring frame 43 includes a photoelectric sensor fixedly connected to the inner side of the outer surface of the inner frame 41. There are four photoelectric sensors, two in a group. In each group, one is close to the top of the inner frame 41 and the other is close to the bottom of the inner frame 41. The photoelectric sensors are electrically connected to the control box 7 through wires.

[0045] In the production site of safety nets, some fiber debris and other small impurities often float in the air. With long-term use of the device, the iron ball used for testing may fall due to jamming of the steel cable, causing deviations in the actual impact force and affecting the accuracy of the test results. This can even lead to the device becoming completely inoperable. Therefore, a lubrication protection component 44 is provided on the front of the frame 421. The lubrication protection component 44 includes:

[0046] Dust cover 441 is fixedly connected to the outer surface of the tray frame 421. A rectangular through hole is provided at the bottom of the dust cover 441. The dust cover 441 is used to block small impurities and fibers from the outside from adhering to the surface of the steel cable.

[0047] Oil drain pipe 442 is inserted into the right side of dust cover 441. The right side of oil drain pipe 442 is connected to an external oil pump. Oil drain pipe 442 is used to drain lubricating oil.

[0048] Oil distribution comb 443 is fixedly connected inside the dust cover 441. The cross-section of the oil distribution comb 443 is S-shaped and the top cross-section of the oil distribution comb 443 is W-shaped. The oil distribution comb 443 is located at the bottom of the oil drain pipe 442 and is used to divert the lubricating oil discharged from the oil drain pipe 442.

[0049] The steel cable sleeve 444 is slidably connected to the steel cable surface of the test ball 422;

[0050] Slipper 445 and steel cable sleeve 444 are fixedly connected to the front and back of the slipper 445. The cross-section of the slipper 445 is C-shaped. A roller is rotatably connected to the inner side of the outer surface of the slipper 445. The inner side of the outer surface of the slipper 445 is slidably connected to the rectangular through hole at the bottom of the dust cover 441.

[0051] The oil scraper 446 is fixedly connected to the bottom of the sliding claw 445. The oil scraper 446 has a hook-shaped cross-section and is used to scrape off the lubricating oil on the surface of the steel cable when the iron ball of the test ball 422 is retracted.

[0052] During use, after the safety net to be tested is installed securely, the device is started through the control box 7. Then, the control box 7 controls the push-pull electromagnet to be energized. The push-pull electromagnet pushes the slide plate of the clutch shaft 423 to move to the left. The slide plate drives the gear shaft to move to the left until the gear shaft disengages from the winch of the test ball 422. At this time, the winch is released from restraint, and the test ball 422 drives the steel cable to make free fall motion. The test ball 422 hits the surface of the safety net. Personnel can judge the test results of the safety net by observing the surface condition of the safety net on site.

[0053] During this process, the test ball 422 passes through the photoelectric sensor of the speed measuring frame 43. The photoelectric sensor feeds back the monitoring data of the test ball 422 when it just falls and when it approaches the safety net to the control box 7. The control box 7 calculates the kinetic energy to help determine whether the impact force acting on the surface of the safety net meets the test requirements, so as to help the test personnel decide whether to retest.

[0054] During this process, the oil drain pipe 442 discharges the lubricating oil pumped in by the oil pump to the surface of the clutch shaft 423. The lubricating oil slides down the surface of the clutch shaft 423 to the surface of the steel cable of the test ball 422, lubricating the surface of the steel cable and reducing the frictional resistance of the steel cable surface. After the test is completed, the push-pull electromagnet of the clutch shaft 423 is de-energized and reset, the motor resumes the connection with the winch of the test ball 422, the motor drives the winch of the test ball 422 to rotate, and the test ball 422 is retrieved.

[0055] During this process, the surface of the steel cable is scraped by the oil scraper 446, which removes the lubricating oil exposed to the outside. At the same time, the dust cover 441 blocks the fine fibers floating in the outside. The eccentric wheel 424 vibrates as the test ball 422 winch rotates, which helps the dust cover 441 to clean up the stuck fine impurities.

[0056] Example 2

[0057] Please see Figure 1-11Based on Embodiment 1, the present invention provides a technical solution: In the existing testing device, the fixation of the safety net is simply to bind and fix the two ends of the safety net. As the device is used for a long time, the fixing effect of this fixing method will become worse and worse, affecting the test results. Therefore, a fixing mechanism 5 is provided on the top of the base 1. The fixing mechanism 5 includes a mounting box 51 fixedly connected to the top of the base 1. A rectangular through hole is opened at the bottom of the mounting box 51 to drain the water simulated by rain spray in time. A swing clamp 52 is provided on the right side of the inner wall of the mounting box 51. The swing clamp 52 includes a swing body 521 rotatably connected to the right side of the inner wall of the mounting box 51. The cross section of the swing body 521 is C-shaped. A toothed plate is fixedly connected to the bottom of the inner wall of the swing body 521.

[0058] A pressure plate 522 is slidably connected to the top of the inner wall of the swing body 521 via a hydraulic cylinder. The swing clamp 52 is used to fix the end of the safety net. A distance sensor 523 is fixedly connected to the bottom of the inner wall of the mounting box 51. The distance sensor 523 is located at the bottom of the swing body 521 and is a laser distance sensor.

[0059] A toothed plate is fixedly connected to the bottom of the inner wall of the swing body 521, and a distance sensor 523 is fixedly connected to the bottom of the inner wall of the mounting box 51. The distance sensor 523 is located at the bottom of the swing body 521 and is a laser distance sensor.

[0060] A fixed roller 53 is provided on the front side of the inner wall of the mounting box 51. The fixed roller 53 includes a roller body 531 rotatably connected to the front side of the inner wall of the mounting box 51. A fixing plate 532 is fixedly connected to the top of the roller body 531 by bolts. A motor is fixedly connected to the front side of the roller body 531. The fixing plate 532 is used to cooperate with the roller body 531 to fix the end of the safety net.

[0061] Before testing, place one end of the safety net inside the swing body 521 and control the hydraulic cylinder through the control box 7 to push the pressure plate 522 to clamp one end of the safety net. Remove the fixing plate 532, place the other end of the safety net on the top of the roller body 531, and then put the fixing plate 532 back and fix it. Then control the motor through the control box 7 to rotate. The motor drives the fixing plate 532 to rotate, roll up the safety net, and the swing body 521 rotates under the drive of the safety net. During this process, the distance sensor 523 detects the distance data from the distance sensor 523 to the bottom of the swing body 521 until the distance data reaches the error range, the swing body 521 is flush with the bottom of the mounting box 51, and the fixing plate 532 stops rotating.

[0062] During the test, the change in the distance data from the bottom of the swing body 521 to the fixed plate 532 is detected by the fixed plate 532 to help determine the test results of the impact performance.

[0063] Example 3

[0064] Please see Figure 1-14 Based on Embodiment 1 and Embodiment 2, the present invention provides a technical solution: In the process of simulated spraying, tap water is often used for spraying. Since the water quality of tap water is relatively unstable, long-term use of tap water can easily affect the spraying simulation effect. Therefore, a simulation mechanism 6 is provided on the top of the outer frame 3. The simulation mechanism 6 includes a spray plate 61 fixedly connected to the top of the outer frame 3. A circular through hole is opened at the bottom of the spray plate 61. The circular through hole at the bottom of the spray plate 61 is connected to the top of the spray plate 61. The spray plate 61 is used to spray water to simulate rain and settle floating fine impurities during the test. The spray plate 61 is located on the top of the inner frame 41.

[0065] A cleaning and slinging assembly 62 is provided at the bottom of the spray plate 61. The cleaning and slinging assembly 62 includes a mounting sleeve 621 fixedly connected to the bottom of the spray plate 61 via a motor. Hot scraper strips 622 are fixedly connected to both the left and right sides of the mounting sleeve 621. The hot scraper strips 622 have a Z-shaped cross-section. A stabilizing ring 623 is fixedly connected between the hot scraper strips 622. Heating wires are embedded inside the hot scraper strips 622 and the stabilizing ring 623.

[0066] A vibration motor 63 is fixedly connected to the top of the spray plate 61, and a filter tank 64 is connected to the top of the spray plate 61. The filter tank 64 is connected to an external water pump.

[0067] When in use, the water pump discharges water into the spray plate 61. The water undergoes preliminary filtration through the filter tank 64 before entering the spray plate 61 and then being discharged from the bottom of the spray plate 61, simulating a rain environment.

[0068] During this process, the motor drives the mounting sleeve 621 to rotate, and the mounting sleeve 621 drives the hot scraper 622 and the stabilizing ring 623 to rotate, scraping the bottom surface of the spray plate 61 to remove debris or scale attached to the bottom of the spray plate 61. At the same time, by shaking some of the sprayed water, the water is allowed to come into more contact with the surrounding air, improving the sedimentation effect of water on fine fibers.

[0069] During the spraying process, the vibrating motor 63 is powered on and generates vibration. The vibration is transmitted to the inside of the spray plate 61, which promotes the loosening of scale and other impurities attached to the inside of the spray plate 61 and prevents the accumulation of impurities from causing blockage.

[0070] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A safety net impact performance testing device, comprising a base (1), a first linear motor (2) fixedly connected to the top of the base (1), and an outer frame (3) fixedly connected to the top of the base (1), characterized in that: The first linear motor (2) is provided with an impact mechanism (4) at the top. The impact mechanism (4) includes an inner frame (41) fixedly connected to the top of the mover of the first linear motor (2). The bottom of the inner frame (41) is provided with an iron ball winch (42). The iron ball winch (42) includes a disc frame (421) fixedly connected to the bottom of the mover of the U-shaped linear motor. The disc frame (421) is rotatably connected to a test ball (422) through a winch and a steel cable. The front of the disc frame (421) is provided with a lubrication protection component (44). The lubrication protection component (44) includes: A dust cover (441) is fixedly connected to the outer surface of the tray frame (421), and a rectangular through hole is provided at the bottom of the dust cover (441). Oil drain pipe (442), which is inserted into the right side of dust cover (441); Oil separating comb (443), the oil separating comb (443) is fixedly connected inside the dust cover (441), the cross-section of the oil separating comb (443) is S-shaped, and the top cross-section of the oil separating comb (443) is W-shaped.

2. The safety net impact performance testing device according to claim 1, characterized in that: The bottom of the inner frame (41) is fixedly connected to an iron ball winch (42) by a U-shaped linear motor. The left side of the test ball (422) winch is slidably connected to a clutch shaft (423). The clutch shaft (423) includes a gear shaft. The right side of the gear shaft is slidably connected to the left side of the test ball (422) winch. A slide plate is rotatably connected to the outer surface of the gear shaft. The slide plate is slidably connected to the left side of the disc frame (421) by a push-pull electromagnet. A circular blind hole is opened on the left side of the gear shaft. A motor is fixedly connected to the gear shaft through the circular blind hole. A speed measuring frame (43) is provided on the inner side of the outer surface of the inner frame (41). The speed measuring frame (43) includes a photoelectric sensor fixedly connected to the inner side of the outer surface of the inner frame (41).

3. The safety net impact performance testing device according to claim 2, characterized in that: The iron ball of the test ball (422) is located at the bottom of the dust cover (441), and the oil distribution comb (443) is located at the bottom of the oil drain pipe (442).

4. The safety net impact performance testing device according to claim 3, characterized in that: The test ball (422) has a steel cable sleeve (444) slidably connected to the steel cable surface. The front and back sides of the steel cable sleeve (444) are fixedly connected to a slipper (445). A roller is rotatably connected to the inner side of the outer surface of the slipper (445). The inner side of the outer surface of the slipper (445) is slidably connected to the rectangular through hole at the bottom of the dust cover (441). An oil scraper (446) is fixedly connected to the bottom of the slipper (445). The cross-section of the oil scraper (446) is barbed.

5. The safety net impact performance testing device according to claim 1, characterized in that: The base (1) is provided with a fixing mechanism (5) at the top. The fixing mechanism (5) includes a mounting box (51) fixedly connected to the top of the base (1). The bottom of the mounting box (51) is provided with a rectangular through hole. The right side of the inner wall of the mounting box (51) is provided with a swing clamp (52). The swing clamp (52) includes a swing body (521) rotatably connected to the right side of the inner wall of the mounting box (51). The top of the inner wall of the swing body (521) is slidably connected to a pressure plate (522) by a hydraulic cylinder.

6. The safety net impact performance testing device according to claim 5, characterized in that: A toothed plate is fixedly connected to the bottom of the inner wall of the swing body (521), and a distance measuring sensor (523) is fixedly connected to the bottom of the inner wall of the mounting box (51).

7. The safety net impact performance testing device according to claim 6, characterized in that: The mounting box (51) has a fixed roller (53) on the front of its inner wall. The fixed roller (53) includes a roller body (531) rotatably connected to the front of the inner wall of the mounting box (51). A fixing plate (532) is fixedly connected to the top of the roller body (531) by bolts. A motor is fixedly connected to the front of the roller body (531). The fixing plate (532) is used to cooperate with the roller body (531) to fix the end of the safety net.

8. The safety net impact performance testing device according to claim 1, characterized in that: The top of the outer frame (3) is provided with a simulation mechanism (6), which includes a spray plate (61) fixedly connected to the top of the outer frame (3). The bottom of the spray plate (61) is provided with a circular through hole, and the circular through hole at the bottom of the spray plate (61) is connected to the top of the spray plate (61). The spray plate (61) is located on the top of the inner frame (41).

9. The safety net impact performance testing device according to claim 8, characterized in that: The bottom of the spray plate (61) is provided with a cleaning and slinging assembly (62). The cleaning and slinging assembly (62) includes a mounting sleeve (621) fixedly connected to the bottom of the spray plate (61) by a motor. Hot scraper strips (622) are fixedly connected to both the left and right sides of the mounting sleeve (621). Heating wires are embedded inside the hot scraper strips (622).

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