Safety net impact force absorbing performance detection device

Abstract

The utility model relates to the safety net performance detection field discloses safety net impact force absorption performance detection equipment, including the protective housing, four support legs are fixedly connected in the protective housing, two adjacent support legs are fixedly connected with fixed support, one of fixed support inboard is fixedly connected with detection box, the long box is fixedly connected between the support legs, the long box inside is connected with the sliding block of sliding, the sliding block top is fixedly connected with a plurality of clamping columns, the sliding block inside is connected with the threaded rod of screw thread, the threaded rod is fixedly connected with the handle away from the one end of sliding block, the protective housing inside is fixedly connected with four electric push rods. In the utility model, through the double protection structure formed by the protective housing and the liftable protection plate, the electric push rod drives the protection plate to drive the protective housing inner wall closely and abuts when detecting, constructs the closed protection space. The safety protection level when the equipment operation is greatly promoted.

Description

Technical Field

[0001] This utility model relates to the field of safety net performance testing, and in particular to a device for testing the impact absorption performance of safety nets. Background Technology

[0002] With the widespread use of safety nets in construction, high-altitude operations, and sports activities, their impact absorption performance during falls has become a key indicator for ensuring personnel safety. Traditional manual or simple testing methods are insufficient in accuracy, leading to the development of safety net impact absorption performance testing equipment. This equipment is mainly used for factory quality inspection by safety net manufacturers, market spot checks by construction safety regulatory agencies, and compliance testing of safety nets in sports venues and high-altitude work sites before their use. Its structure typically consists of a simulated falling object impactor, a device to control the release height of the impactor, a test frame to fix the safety net, a force sensor to collect impact force data in real time, and a digital display and data recording system to analyze force changes during the impact. Its main function is to accurately detect the safety net's ability to absorb energy and buffer impact force when subjected to an impact by simulating actual falling impact scenarios, quantifying key parameters such as peak impact force and energy absorption value, and determining whether the safety net meets national or industry safety standards. This provides a scientific basis for the quality control, market access, and safe use of safety nets, effectively reducing the risk of safety accidents caused by substandard safety net performance. Currently available safety net impact absorption performance testing equipment does not provide adequate protection for workers. When encountering a very tough safety net, the impacting object may be bounced off the device and cause injury to the workers. Therefore, this safety net impact absorption performance testing equipment is proposed to solve the above problems. Utility Model Content

[0003] To overcome the above deficiencies, this utility model provides a safety net impact absorption performance testing device, which aims to improve the problem of inadequate protective measures in testing equipment.

[0004] The safety net impact absorption performance testing equipment provided in this application adopts the following technical solution: A safety net impact absorption performance testing device includes a protective shell, four legs fixedly connected inside the protective shell, a fixed bracket fixedly connected between two adjacent legs, a testing box fixedly connected inside the fixed bracket on the rear side, a long box fixedly connected between two adjacent legs, a slider slidably connected inside the long box, multiple locking pins fixedly connected to the top of the slider, a threaded rod threadedly connected inside the slider, a handle fixedly connected to the end of the threaded rod away from the slider, four electric push rods fixedly connected inside the protective shell, a stop ring slidably connected inside the protective shell, and a protective plate fixedly connected to the top of the stop ring.

[0005] By adopting the above technical solution, the safety net can be firmly fixed to the outside of the anchor post.

[0006] Preferably, a base is fixedly connected to the outside of the protective shell, four load-bearing steel frames are fixedly connected to the top of the base, a reinforcing steel frame is fixedly connected between two adjacent load-bearing steel frames, a steel plate is fixedly connected to the top of the reinforcing steel frame, a steel plate is fixedly connected to the outside of the reinforcing steel frame, and two tie rods are fixedly connected to the bottom of both the steel plate and the steel plate. A pulley is rotatably connected between two of the tie rods, and a pulley is rotatably connected between the other two tie rods.

[0007] By adopting the above technical solutions, reinforcing the steel frame can make the entire device more stable.

[0008] Preferably, a motor is fixedly connected to the top of the base, and a cable box is fixedly connected to the output end of the motor. The cable box is fixedly connected to the top of the base, and a wire harness is provided inside the cable box. The wire harness abuts against the inner wall of the second pulley and the inner wall of the first pulley.

[0009] By adopting the above technical solution, the motor start-up can drive the wire harness in the cable box to shorten or lengthen.

[0010] Preferably, a release assembly is fixedly connected to the end of the wire harness away from the cable box. The bottom of the release assembly has a square groove, and a first round shaft is fixedly connected inside the square groove. A pull wire is sleeved on the outside of the first round shaft. A gravity ball is provided at the bottom of the pull wire. A round groove is provided at the top of the gravity ball. A second round shaft is fixedly connected inside the round groove. The end of the pull wire away from the release assembly is sleeved on the outside of the second round shaft.

[0011] By adopting the above technical solution, the string can withstand the weight of the gravity ball.

[0012] Preferably, the output end of the electric push rod is fixedly connected to the bottom of the abutment ring, and the top of the abutment ring abuts against the inner top wall of the protective shell.

[0013] By adopting the above technical solution, the electric push rod is prevented from pushing the abutment ring out of the device.

[0014] Preferably, the cable box is fixedly connected to the top of the base.

[0015] By adopting the above technical solution, displacement of the cable box during operation can be prevented.

[0016] Preferably, the end of the threaded rod away from the handle is rotatably connected to the inner wall of the long box.

[0017] By adopting the above technical solution, the stability of the threaded rod rotation is guaranteed.

[0018] Preferably, two of the load-bearing steel frames are externally fixedly connected to support rods, and the end of the support rod away from the load-bearing steel frame is fixedly connected to the bottom of the second steel plate.

[0019] By adopting the above technical solution, the stability of steel plate 2 was improved.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. In this utility model, a double protective structure is formed by the protective shell and the liftable protective plate. During testing, the electric push rod drives the abutment ring to move the protective plate up and tightly abut against the inner wall of the protective shell, creating a closed protective space. Even if the gravity ball rebounds due to a highly resilient safety net, the protective shell and protective plate can effectively prevent the impacting object from flying out of the device, physically eliminating the risk of the impacting object causing injury to surrounding personnel and significantly improving the safety protection level of the equipment during operation. 2. In this utility model, the position of the slider is adjusted by rotating the handle, thereby adjusting the position of the locking post, making the safety net easier to install. After installation, the handle is rotated again to adjust the position of the locking post, so that the safety net is tightened, achieving the effect of making the safety net easier to install and remove. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the safety net impact absorption performance testing device proposed in this utility model. Figure 2 This is a schematic diagram of the limiting column of the safety net impact absorption performance testing device proposed in this utility model; Figure 3 This is a schematic diagram of the handle structure of the safety net impact absorption performance testing device proposed in this utility model; Figure 4 This is a schematic diagram of the structure of the electric push rod of the safety net impact absorption performance testing device proposed in this utility model. Figure 5 This is a schematic diagram of the motor structure of the safety net impact absorption performance testing device proposed in this utility model. Figure 6 This is a schematic diagram of the reinforced steel frame of the safety net impact absorption performance testing device proposed in this utility model; Figure 7 This is a schematic diagram of the gravity ball structure of the unhooking component of the safety net impact absorption performance testing device proposed in this utility model; Figure 8 This is a schematic diagram of the gravity ball structure of the safety net impact absorption performance testing device proposed in this utility model. Explanation of reference numerals in the attached drawings: 1. Protective shell; 2. Support leg; 3. Fixed bracket; 4. Long box; 5. Slider; 6. Locking post; 7. Electric push rod; 8. Abutment ring; 9. Protective plate; 10. Base; 11. Load-bearing steel frame; 12. Reinforced steel frame; 13. Steel plate one; 14. Steel plate two; 15. Support rod; 16. Pull rod; 17. Pulley one; 18. Pulley two; 19. Motor; 20. Cable box; 21. Wire harness; 22. Unhooking assembly; 23. Square groove; 24. Round shaft one; 25. Pull line; 26. Gravity ball; 27. Round groove; 28. Round shaft two; 29. ​​Detection box; 30. Threaded rod; 31. Handle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1-3 This utility model provides an embodiment of a safety net impact absorption performance testing device. Four legs 2 are fixedly connected to the four corners inside the protective shell 1. The legs 2 are made of high-strength alloy material. Multiple fixed supports 3, made of channel steel, are fixedly connected to adjacent legs 2 by welding, further enhancing the overall structural stability of the device. A testing box 29 is fixedly connected to the inner side of one of the fixed supports 3 in the middle by screws. The testing box 29 integrates core components such as a pressure sensor, data acquisition module, and processing chip, enabling real-time monitoring and recording of various data during the testing process. Near the top between the legs 2, a long box 4 is fixedly connected. The long box 4 is a hollow cuboid structure with a slider 5 slidably connected inside, allowing it to slide along the long box 4. Multiple locking posts 6, made of hard alloy, are evenly fixedly connected to the top of the slider 5 to secure the edge of the safety net and prevent displacement during testing. The slider 5 has a threaded rod 30 connected to it by a transverse thread inside, and a handle 31 is fixedly connected to it. By rotating the handle 31, the threaded rod 30 can be rotated, which in turn pushes the slider 5 to slide inside the long box 4, thereby adjusting the fixed position of the safety net. The protective shell 1 has four electric push rods 7 fixedly connected inside, and a stop ring 8 is slidably connected inside the protective shell 1. A protective plate 9 is fixedly connected to the top of the stop ring 8.

[0024] Reference Figures 4-6The protective shell 1 has a base 10 fixedly connected to its bottom for supporting the upper structure. The base 10 is made of heavy steel plate to ensure the overall stability of the equipment. Four rectangular load-bearing steel frames 11 are vertically fixedly connected to the top of the base 10. The load-bearing steel frames 11 are made of high-strength alloy steel. Multiple reinforcing steel frames 12 are horizontally fixedly connected between the load-bearing steel frames 11. The reinforcing steel frames 12 and the load-bearing steel frames 11 form a stable frame structure. A steel plate 13 is horizontally fixedly connected to the top of the reinforcing steel frame 12. A steel plate 14 perpendicular to the steel plate 13 is fixedly connected to the outer side of the reinforcing steel frame 12. Two inclined tie rods 16 are symmetrically fixedly connected to the bottom of the steel plate 13 and the steel plate 14. The tie rods 16 are made of high-strength steel rods. A pulley 17 is rotatably connected between two adjacent tie rods 16 through a pivot, and a pulley 18 is rotatably connected between two other adjacent tie rods 16 through a pivot. Both pulleys 17 and 18 are made of wear-resistant alloy material.

[0025] Reference Figures 4-5 A motor 19 for providing power is fixedly connected to one side of the top of the base 10. The output end of the motor 19 is fixedly connected to a cable box 20 through a coupling. The cable box 20 is fixedly connected to the top of the base 10 by bolts. A wire harness 21 for traction impact body is wound inside the cable box 20. The wire harness 21 is made of high-strength steel wire rope. The end of the wire harness 21 away from the cable box 20 abuts against the inner wall of pulley 2 18 and the inner wall of pulley 17 in sequence.

[0026] Reference Figures 5-7 The end of the wire harness 21 away from the cable box 20 is fixedly connected to a release assembly 22 for controlling the release of the impactor. The bottom of the release assembly 22 has a square groove 23 for installing connectors. A round shaft 24 is fixedly connected horizontally inside the square groove 23. A pull wire 25 for connecting the impactor is movably sleeved on the outside of the round shaft 24. The pull wire 25 is made of high-strength fiber rope. A gravity ball 26 simulating a fall impact is suspended at the bottom of the pull wire 25. The gravity ball 26 is set to a specific weight according to the testing requirements. A round groove 27 is opened at the center of the top of the gravity ball 26. A round shaft 28 is fixedly connected horizontally inside the round groove 27. The end of the pull wire 25 away from the release assembly 22 is sleeved on the outside of the round shaft 28, and a stable connection with the gravity ball 26 is achieved through the round shaft 28.

[0027] Reference Figures 1-3 The output end of the electric push rod 7 is fixedly connected to the bottom of the abutment ring 8 via a flange. The electric push rod 7 can drive the abutment ring 8 to move the protective plate 9 up and down. When the device is in the protective state, the top of the abutment ring 8 abuts against the inner top wall of the protective shell 1 to form the initial support structure.

[0028] Reference Figure 4 The cable box 20 is tightly fixed to the top of the base 10 by bolts to ensure that it will not shift during traction.

[0029] Reference Figures 1-3 The end of the threaded rod 30 away from the handle 31 is rotatably connected to the inner wall of the long box 4, making the rotation of the threaded rod 30 more stable.

[0030] Reference Figure 5 Two adjacent load-bearing steel frames 11 are externally inclined and fixedly connected with support rods 15. The other end of the support rods 15 is fixedly connected to the bottom of the steel plate 14 by welding, forming a triangular support structure, which further enhances the load-bearing capacity of the steel plate 14.

[0031] Working principle: Before the test begins, turn handle 31 to adjust the position of slider 5, and then adjust the position of locking post 6 to make the safety net easier to install. After installation, continue to turn handle 31 to adjust the position of locking post 6 so that the safety net is tightened. After the equipment is started, the four electric push rods 7 inside the protective shell 1 work synchronously, driving the abutment ring 8 to move the protective plate 9 upward until the abutment ring 8 is tightly against the inner wall of the protective shell 1. At this time, the protective plate 9 forms a protective space to prevent the gravity ball 26 from flying out. At the same time, the motor 19 starts, driving the cable box 20 to operate. The wire harness 21 is guided by pulley 28 and pulley 17 to pull the gravity ball 26 to a preset height directly above the safety net 6. The round shaft 24 in the unhooking component 22 retracts, causing the pull wire 25 sleeved on the outside to lose its restraint. The gravity ball 26 falls freely under the action of gravity and accurately impacts the safety net 6 below. During the impact, the safety net 6 deforms to absorb the impact energy. At this time, the detection box 29 inside the fixed bracket 3 monitors and quantifies key parameters such as the peak impact force and energy absorption value in real time. After the impact, the detection box 29 records and analyzes the data to complete the test of the safety net's impact force absorption performance, providing a basis for determining whether the safety net meets safety standards.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A safety net impact absorption performance testing device, comprising a protective shell (1), characterized in that: The protective shell (1) has four legs (2) fixedly connected inside. A fixed bracket (3) is fixedly connected between two adjacent legs (2). A detection box (29) is fixedly connected inside the fixed bracket (3) on the rear side. A long box (4) is fixedly connected between two adjacent legs (2). A slider (5) is slidably connected inside the long box (4). Multiple locking posts (6) are fixedly connected to the top of the slider (5). A threaded rod (30) is threadedly connected inside the slider (5). A handle (31) is fixedly connected to the end of the threaded rod (30) away from the slider (5). Four electric push rods (7) are fixedly connected inside the protective shell (1). A stop ring (8) is slidably connected inside the protective shell (1). A protective plate (9) is fixedly connected to the top of the stop ring (8).

2. The safety net impact absorption performance testing equipment according to claim 1, characterized in that: The protective shell (1) is fixedly connected to a base (10) on the outside. Four load-bearing steel frames (11) are fixedly connected to the top of the base (10). A reinforcing steel frame (12) is fixedly connected between two adjacent load-bearing steel frames (11). A steel plate (13) is fixedly connected to the top of the reinforcing steel frame (12). A steel plate (14) is fixedly connected to the outside of the reinforcing steel frame (12). Two pull rods (16) are fixedly connected to the bottom of both the steel plate (13) and the steel plate (14). A pulley (17) is rotatably connected between the two pull rods (16), and a pulley (18) is rotatably connected between the other two pull rods (16).

3. The safety net impact absorption performance testing equipment according to claim 2, characterized in that: A motor (19) is fixedly connected to the top of the base (10), and a cable box (20) is fixedly connected to the output end of the motor (19). The cable box (20) is fixedly connected to the top of the base (10), and a wire harness (21) is provided inside the cable box (20). The wire harness (21) abuts against the inner wall of the pulley two (18) and the wire harness (21) abuts against the inner wall of the pulley one (17).

4. The safety net impact absorption performance testing equipment according to claim 3, characterized in that: The end of the wire harness (21) away from the cable box (20) is fixedly connected to a release assembly (22). The bottom of the release assembly (22) is provided with a square groove (23). A round shaft (24) is fixedly connected inside the square groove (23). A pull wire (25) is sleeved on the outside of the round shaft (24). A gravity ball (26) is provided at the bottom of the pull wire (25). A round groove (27) is provided at the top of the gravity ball (26). A round shaft (28) is fixedly connected inside the round groove (27). The end of the pull wire (25) away from the release assembly (22) is sleeved on the outside of the round shaft (28).

5. The safety net impact absorption performance testing equipment according to claim 1, characterized in that: The output end of the electric push rod (7) is fixedly connected to the bottom of the abutment ring (8), and the top of the abutment ring (8) abuts against the inner top wall of the protective shell (1).

6. The safety net impact absorption performance testing equipment according to claim 1, characterized in that: The threaded rod (30) is rotatably connected to the inner wall of the long box (4) at the end away from the handle (31).

7. The safety net impact absorption performance testing equipment according to claim 2, characterized in that: Two of the load-bearing steel frames (11) are externally fixedly connected to support rods (15), and one end of the support rod (15) away from the load-bearing steel frame (11) is fixedly connected to the bottom of the steel plate two (14).

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