Safety net impact resistance detection device

Abstract

According to the impact resistance detection device for the safety net provided by the utility model, one end of the safety net sample is fixed by arranging the clamping plate on the inclined frame, and the other end of the safety net sample is provided with the rotating rod and the fixing plate on the rotating rod so as to adjust the tensioning degree of the safety net sample; the rotating rod is fixed in the mode that the sliding block slides on the rotating rod or is separated from the rotating rod, the supporting rod is fixedly connected to the base, the supporting rod is elastically connected with the frame rod, and the protective net is fixed through the frame rod; by adopting the technical scheme, the safety net sample can be mounted by one person, so that the testing efficiency is effectively improved; the tension degree of the safety net sample can be adjusted, the impact resistance limit of the safety net sample can be effectively obtained after multiple tests, and meanwhile the test effectiveness is effectively improved; and the probability that the test rod or the ground is damaged due to the fact that the test rod falls to the ground is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of safety net strength detection equipment, in particular to a safety net impact resistance detection device. Background Art

[0002] Safety nets are commonly used protective facilities in the fields of construction and transportation. They are mainly used to block people, sight, natural wind, splashes and uncontrolled small objects, and avoid and reduce injuries caused by falling and hitting objects. They are national special labor protection products. Therefore, they need to be tested for impact resistance before large-scale production and use. The national standard "GB 5725-2009 Safety Net" specifically formulates relevant standards for the impact resistance test of safety nets, such as the angle between the penetration test frame and the horizontal plane is 30 degrees, the penetration height is 1 meter, and the weight of the test rod is clearly stipulated.

[0003] At present, the commonly used safety net impact detection device consists of a hanger for throwing a test rod and a base for clamping the safety net. When in use, the safety net needs to be fixed on the base in advance, and then the test rod is placed on the hanger. After releasing the test rod, it hits the safety net sample and observes the degree of damage to the safety net sample. In this way, the safety net sample is tested. However, the test result is related to the tension of the safety net sample. The tighter the tension, the easier it may be to break during the test. The looser the tension, the less likely it is to break during the test due to the toughness of the safety net. In addition, since the safety net sample is in contact with the test rod at an inclined angle, the test rod will slide to the inclined side of the safety net when it does not penetrate the safety net sample. The high frequency of landing will cause bumps on the test rod, resulting in insufficient radial roundness, especially the conical test rod is easy to damage the tip, and it will also damage the ground. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies in the above-mentioned technology and to propose a safety net impact resistance detection device, which aims to solve the problems of different test results due to different tension levels of the safety net during installation and damage to the test rod or damage to the ground by the test rod.

[0005] The utility model provides a safety net impact resistance detection device, comprising a base, an inclined frame and a hanger for hanging a test rod, the inclined frame is fixedly connected to the base, the hanger is perpendicular to the base and fixedly connected, the end face of one side of the inclined frame is fixedly connected with a clamping mechanism for clamping a safety net sample; the inclined frame is hinged with a rotating rod for adjusting the safety net sample on one side corresponding to the clamping mechanism, the inclined frame is slidably connected with a locking mechanism for limiting the rotation of the rotating rod, and the locking mechanism is located on the side away from the hinged rotating rod of the inclined frame; the base is fixedly connected with a protective mechanism for receiving the test rod on the inclined side of the inclined frame, and the protective mechanism is spaced from the inclined frame. By setting the clamping mechanism to clamp one end of the safety net sample, the rotating rod presses the other end of the safety net, and the tension of the safety net sample is adjusted by rotating the rotating rod, and the locking mechanism fixes the rotating mechanism after the rotating rod presses the safety net sample. The protective mechanism can effectively reduce the collision of the test rod after it falls to the ground.

[0006] Preferably, the clamping mechanism includes a base plate, a movable plate, a clamping plate, a threaded rod and an opening, the base plate is fixedly connected to the top end surface of the inclined frame, the clamping plate is fixedly connected to the base plate, the movable plate is placed between the base plate and the clamping plate, the opening is opened on the movable plate, and the opening does not penetrate the movable plate, the threaded rod passes through the clamping plate and extends into the opening, and abuts against the bottom wall of the opening.

[0007] Preferably, the rotating rod rotates around the rotating shaft, one end of the rotating shaft is hinged on the tilting frame, the other end of the rotating shaft is movably connected to the tilting frame, and a plurality of fixed plates are fixedly connected at equal intervals on the surface of the rotating rod. The fixed plates can effectively increase the friction with the safety net, so that the safety net can be effectively tightened or loosened when the rotating rod rotates.

[0008] Preferably, the locking mechanism includes a sliding shaft, a slider and a connecting ring, the end of the sliding shaft is fixedly connected to the tilting frame, one end of the connecting ring is sleeved on the sliding shaft, and the other end of the connecting ring is fixedly connected to the slider, the slider slides to open a groove that is the same as the rotating rod and the fixed plate, and the slider slides on the rotating rod. The locking mechanism also includes a limit plate, which is fixedly connected to the end of the sliding shaft away from the tilting frame.

[0009] Preferably, the protective mechanism includes a protective net, a support rod, a fixed rod, a spring and a frame rod, one end of the support rod is fixedly connected to the base, the other end of the support rod is fixedly connected to the fixed rod, the spring is sleeved outside the fixed rod, one end of the spring is fixedly connected to the fixed rod, the other end of the spring is fixedly connected to one end of the frame rod, one side of the protective net is fixedly connected to the frame rod, the side of the protective net away from the frame rod is fixedly connected to the base, and the protective net is spaced apart from the support rod.

[0010] Preferably, the protection mechanism further comprises a protection cover, which is sleeved outside the spring, and a through hole is formed on the side wall of the protection cover, through which one end of the spring connected to the frame rod passes.

[0011] Preferably, one end of the rotating rod close to the slider is fixedly connected with a rocker, and the center of the rocker is eccentrically arranged with respect to the rotating shaft.

[0012] Compared with the prior art, it has the following beneficial effects:

[0013] The utility model provides a safety net impact resistance detection device, which fixes one end of the safety net sample by arranging a clamping plate on an inclined frame, adjusts the tension of the safety net sample by arranging a rotating rod and a fixing plate on the rotating rod at the other end of the safety net sample, and fixes the rotating rod by sliding or disengaging a slider on the rotating rod, a supporting rod is fixedly connected to a base, the supporting rod is elastically connected to a frame rod, and the frame rod fixes the protective net; adopting the above technical scheme,

[0014] 1. One person can install the safety net specimen, effectively improving the testing efficiency;

[0015] 2. It can adjust the tension of the safety net sample, and effectively obtain the impact resistance limit of the safety net sample after multiple tests, while also effectively improving the effectiveness of the test;

[0016] 3. Effectively reduce the probability of the test rod falling to the ground and causing damage to the test rod or the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of a safety net impact resistance detection device of the utility model;

[0019] Figure 2 It is an exploded view of the clamping mechanism of the utility model;

[0020] Figure 3 It is an axial view of the clamping mechanism of the utility model;

[0021] Figure 4 It is a schematic diagram of the rotating rod of the utility model;

[0022] Figure 5 It is a schematic diagram of the rotating rod and the locking mechanism of the utility model;

[0023] Figure 6 It is a schematic diagram of the protective net and support rods of the utility model;

[0024] Figure 7It is a schematic diagram of the protection mechanism of the utility model;

[0025] Figure 8 It is a schematic diagram of the protective cover of the utility model.

[0026] In the figure, base 1; tilting frame 11; hanger 12; clamping mechanism 2; bottom plate 21; movable plate 22; clamping plate 23; threaded rod 24; opening 25; rotating rod 3; rotating shaft 31; fixed plate 32; rocker 33; locking mechanism 4; sliding shaft 41; slider 42; connecting ring 43; limit plate 44; protective mechanism 5; protective net 51; support rod 52; fixed rod 53; spring 54; rack rod 55; protective cover 56; through hole 57. DETAILED DESCRIPTION

[0027] In order to make it easier to understand the structure of the present invention and the functional features and advantages that can be achieved, the preferred embodiments of the present invention are described in detail with reference to the drawings as follows:

[0028] Example:

[0029] like Figures 1 to 3 As shown, the utility model provides a safety net impact resistance detection device, which includes a base 1, a tilting frame 11 and a hanger 12 for hanging a test rod. The tilting frame 11 is fixedly connected to the base 1, and the angle between the tilting frame 11 and the base 1 or the ground is 30 degrees. The hanger 12 is perpendicular to the base 1 and fixedly connected. The hanger 12 is used to hang the test rod. During the test, the test rod falls from the hanger 12 onto the safety net sample, and the degree of damage caused by the test rod to the safety net is observed to determine whether the safety net is qualified. The end face of one side of the tilting frame 11 is fixedly connected with a clamping mechanism 2 for clamping the safety net sample.

[0030] The clamping mechanism 2 includes a bottom plate 21, a movable plate 22, a clamping plate 23, a threaded rod 24 and an opening 25. The bottom plate 21 is fixedly connected to the top end surface of the tilting frame 11, the clamping plate 23 is fixedly connected to the bottom plate 21, the movable plate 22 is placed between the bottom plate 21 and the clamping plate 23, the opening 25 is opened on the movable plate 22, and the opening 25 does not penetrate the movable plate 22, the threaded rod 24 passes through the clamping plate 23 and extends into the opening 25, and abuts against the bottom wall of the opening 25. When in use, the threaded rod 24 is twisted to loosen the movable plate 22, one side of the safety net sample is placed between the movable plate 22 and the bottom plate 21, and the threaded rod 24 is twisted to press the movable plate 22, so that the movable plate 22 presses the safety net. Since the length of the movable plate 22 is equal to or slightly different from the side length of the tilting frame 11, the distortion of the safety net sample is smaller than that of the clamping plate 23 directly, which can effectively protect the safety net sample and improve the accuracy of the test.

[0031] As another example, Figure 4 and Figure 5 As shown, the tilting frame 11 is hinged with a rotating rod 3 for adjusting the safety net sample on one side corresponding to the clamping mechanism 2. The rotating rod 3 is rotatably connected to the rotating shaft 31, one end of the rotating shaft 31 is hinged to the tilting frame 11, and a plurality of fixed plates 32 are fixedly connected to the surface of the rotating rod 3 at equal intervals. The fixed plates 32 can be arranged discontinuously or unequally to increase the friction with the safety net sample. Since the rotating shaft 31 and the tilting frame 11 are hinged, the rotating shaft 31 and the rotating rod 3 can be lifted after one side of the safety net sample is clamped by the movable plate 22, and the corresponding side of the safety net sample is placed under the rotating rod 3. After the rotating shaft 31 and the rotating rod 3 are lowered, the tension of the safety net sample can be adjusted by pressing and rotating the rotating rod 3. In this way, one person can place the safety net sample, effectively reducing the use of personnel, making the operation more convenient, and being able to adjust the tension of the safety net sample, that is, multiple tests can be performed at different tensions, effectively improving the accuracy of the test. One end of the rotating rod 3 close to the slider 42 is fixedly connected with a rocker 33, and the center of the rocker 33 is eccentrically arranged with respect to the rotating shaft 31. The rocker 33 can facilitate the rotation of the rotating rod 3.

[0032] As another example, Figure 5 As shown, the tilting frame 11 of the present application is slidably connected with a locking mechanism 4 for limiting the rotation of the rotating rod 3. The locking mechanism 4 includes a sliding shaft 41, a slider 42 and a connecting ring 43. The end of the sliding shaft 41 is fixedly connected to the tilting frame 11, one end of the connecting ring 43 is sleeved on the sliding shaft 41, and the other end of the connecting ring 43 is fixedly connected to the slider 42. The slider 42 slides to open a groove that is the same as the rotating rod 3 and the fixed plate 32, and the slider 42 slides on the rotating rod 3. The locking mechanism 4 also includes a limiting plate 44, which is fixedly connected to the end of the sliding shaft 41 away from the tilting frame 11.

[0033] When in use, slide the slider 42 to the outside of the rotating rod 3, lift the rotating rod 3 to place the safety net sample, and after placing it, press the rotating rod 3 to compress the safety net sample. After rotating the rotating rod 3 to a suitable tension, slide the slider 42 onto the rotating rod 3 to lock the rotating rod 3. The sliding shaft 41 is parallel to the rotating shaft 31 or the rotating rod 3. In order to prevent the slider 42 from sliding off the rotating rod 3 and to make the rotating rod 3 still able to rotate, on the one hand, the gap between the sliding shaft 41 and the connecting ring 43 can be reduced to increase friction, and on the other hand, a number of shallow marks can be engraved on the sliding shaft 41 to increase friction. In actual use, the test rod falls for a very short time, so it is not necessary to install other devices for limiting.

[0034] As another example, Figure 1 and Figures 6 to 8As shown, the base 1 of the present application is fixedly connected to a protective mechanism 5 for receiving a test rod at the inclined side of the tilting frame 11, and the protective mechanism 5 is spaced apart from the tilting frame 11. The protective mechanism 5 includes a protective net 51, a support rod 52, a fixed rod 53, a spring 54 and a frame rod 55, one end of the support rod 52 is fixedly connected to the base 1, the other end of the support rod 52 is fixedly connected to the fixed rod 53, the spring 54 is sleeved outside the fixed rod 53, one end of the spring 54 is fixedly connected to the fixed rod 53, the other end of the spring 54 is fixedly connected to one end of the frame rod 55, one side of the protective net 51 is fixedly connected to the frame rod 55, the side of the protective net 51 away from the frame rod 55 is fixedly connected to the base 1, and the protective net 51 is spaced apart from the support rod 52.

[0035] During operation, the test rod falls onto the safety net sample. If the test rod penetrates the safety net sample, it will slide to the side of the protection net 51, or even bounce onto the protection net 51. When the protection net 51 is impacted by external force, the frame rod 55 moves to the outside of the protection net 51 and stretches the spring 54. After the test rod is taken away, the spring 54 is reset. The spring 54 is a thin spring 54, which can buffer the impact force of the test rod falling and will not reset immediately.

[0036] The protection mechanism 5 further includes a protection cover 56, which is sleeved outside the spring 54, and a through hole 57 is formed on the side wall of the protection cover 56, and one end of the spring 54 connected to the rack rod 55 passes through the through hole 57. The through hole 57 is a vertical hole, which facilitates the extension and retraction of the spring 54.

[0037] The working principle of the impact resistance detection device of a safety net in the present application is as follows: during the test, after placing one side of the safety net sample between the bottom plate 21 and the movable plate 22, tighten the threaded rod 24 so that the movable plate 22 presses one side of the safety net sample. Lift the rotating rod 3, place the other end of the safety net sample under the rotating rod 3, press and rotate the rotating rod 3 to adjust the tension of the safety net sample, and after adjustment, insert the slider 42 into the rotating rod 3. Since the rotating rod 3 is fixedly connected with the fixed plate 32, the slider 42 has a groove corresponding to the fixed plate 32, so the slider 42 can prevent the rotating rod 3 from rotating. After the safety net sample is fixed, hang the test rod on the hanger 12. After the test rod is released, it falls on the safety net, observe the degree of damage to the safety net, and complete a test. In order to make the test result more accurate, the tension of the safety net sample can be adjusted by the rotating rod 3, and the limit value of impact resistance can be obtained after multiple tests. In addition, if the safety net is not damaged or penetrated by the test rod during the impact, the test rod will slide to the inclined side of the tilt frame 11 or bounce onto the protection net 51. When the protection net 51 is impacted by external force, the frame rod 55 moves to the outside of the protection net 51 and stretches the spring 54. The spring 54 is reset after the test rod is removed.

[0038] The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the present invention by using the above technical content without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention belong to the protection scope of the present technical solution.

Claims

1. A safety net impact resistance detection device, comprising a base (1), an inclined frame (11) and a hanger (12) for hanging a test rod, characterized in that The tilting frame (11) is fixedly connected to the base (1), the hanging bracket (12) is perpendicular to and fixedly connected to the base (1), and a clamping mechanism (2) for clamping a safety net sample is fixedly connected to the end surface of one side of the tilting frame (11); a rotating rod (3) for adjusting the tension of the safety net sample is hingedly connected to the tilting frame (11) on one side corresponding to the clamping mechanism (2); the tilting frame (11) is slidably connected to a locking mechanism (4) for limiting the rotation of the rotating rod (3), and the locking mechanism (4) is located on a side away from the tilting frame (11) on which the rotating rod (3) is hinged; the base (1) is fixedly connected to a protective mechanism (5) for receiving a test rod on the tilting side of the tilting frame (11), and the protective mechanism (5) is spaced apart from the tilting frame (11).

2. A safety net impact resistance detection device according to claim 1, characterized in that: The clamping mechanism (2) comprises a base plate (21), a movable plate (22), a clamping plate (23), a threaded rod (24) and an opening (25); the base plate (21) is fixedly connected to the top end surface of the tilting frame (11); the clamping plate (23) is fixedly connected to the base plate (21); the movable plate (22) is placed between the base plate (21) and the clamping plate (23); the opening (25) is formed on the movable plate (22), and the opening (25) does not penetrate the movable plate (22); the threaded rod (24) passes through the clamping plate (23) and extends into the opening (25), and abuts against the bottom wall of the opening (25).

3. A safety net impact resistance detection device according to claim 2, characterized in that: The rotating rod (3) rotates around a rotating shaft (31), one end of the rotating shaft (31) is hinged on the tilting frame (11), and the other end of the rotating shaft (31) is movably connected to the tilting frame (11). A plurality of fixed plates (32) are fixedly connected at equal intervals on the surface of the rotating rod (3).

4. A safety net impact resistance detection device according to claim 3, characterized in that: The locking mechanism (4) comprises a sliding shaft (41), a slider (42) and a connecting ring (43); the end of the sliding shaft (41) is fixedly connected to the tilting frame (11); one end of the connecting ring (43) is sleeved on the sliding shaft (41); the other end of the connecting ring (43) is fixedly connected to the slider (42); the slider (42) slides to open a groove that is the same as the rotating rod (3) and the fixed plate (32); the slider (42) slides on the rotating rod (3).

5. A safety net impact resistance detection device according to claim 4, characterized in that: The locking mechanism (4) further comprises a limiting plate (44), wherein the limiting plate (44) is fixedly connected to the end of the sliding shaft (41) on a side away from the tilting frame (11).

6. A safety net impact resistance detection device according to claim 1, characterized in that: The protective mechanism (5) comprises a protective net (51), a support rod (52), a fixed rod (53), a spring (54) and a frame rod (55); one end of the support rod (52) is fixedly connected to the base (1); the other end of the support rod (52) is fixedly connected to the fixed rod (53); the spring (54) is sleeved outside the fixed rod (53); one end of the spring (54) is fixedly connected to the fixed rod (53); the other end of the spring (54) is fixedly connected to one end of the frame rod (55); one side of the protective net (51) is fixedly connected to the frame rod (55); a side of the protective net (51) away from the frame rod (55) is fixedly connected to the base (1); and the protective net (51) is spaced from the support rod (52).

7. A safety net impact resistance detection device according to claim 6, characterized in that: The protection mechanism (5) further comprises a protection cover (56), wherein the protection cover (56) is sleeved outside the spring (54), and a through hole (57) is provided on a side wall of the protection cover (56), and one end of the spring (54) connected to the rack rod (55) passes through the through hole (57).

8. A safety net impact resistance detection device according to claim 4, characterized in that: One end of the rotating rod (3) close to the sliding block (42) is fixedly connected to a rocker (33), and the center of the rocker (33) is eccentrically arranged with respect to the rotating shaft (31).

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