CN113607577A - Safety net impact resistance testing machine - Google Patents
Safety net impact resistance testing machine Download PDFInfo
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- CN113607577A CN113607577A CN202110899413.8A CN202110899413A CN113607577A CN 113607577 A CN113607577 A CN 113607577A CN 202110899413 A CN202110899413 A CN 202110899413A CN 113607577 A CN113607577 A CN 113607577A
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- 238000005381 potential energy Methods 0.000 description 5
- 238000009863 impact test Methods 0.000 description 4
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The application relates to a safety net impact resistance testing machine which comprises a hanging frame and a frame, wherein the hanging frame comprises a plurality of groups of vertical rods and transverse rods, and two groups of first channel steel are fixed on the hanging frame; a plurality of groups of sliding blocks are inserted into the notches of the first channel steel in a sliding manner, and a group of sliding blocks close to the end part of the first channel steel are fixedly connected; each group of sliding blocks is fixed with a hook, and any two adjacent groups of sliding blocks are connected with a connecting belt; each group of first channel steel is provided with a wall groove in a through mode, a rack is fixed on each group of first channel steel, the sliding block is integrally connected with a support which is inserted into the wall groove to slide, and a motor driven by a gear and a rack is installed on the support; the rack is positioned at one side of the hanging rack, a winch is fixed at the upper end of the rack, an inclined rod is fixed on the rack, a pulley is rotatably connected to the inclined rod, a rope is wound on the winch, and a test ball is connected to the lower end of the rope; two sides of the safety net to be tested are hung on the hooks. This application is convenient for the tester to open the safety net and hangs, has promoted the efficiency of testing process.
Description
Technical Field
The application relates to the field of safety net testing machines, in particular to a safety net impact resistance testing machine.
Background
The safety net is a net which is arranged under or on the side of the safety net and has a protection function when high-altitude building construction equipment is installed or skills are performed, so that accidents caused by falling of people or objects are prevented. The safety net is composed of a net body, a side rope, a tying rope and a reinforcing rope. The net body is formed by knitting net ropes and is provided with a rhombic or square mesh. The mesh size refers to the distance between two adjacent knots of the braid. The net ropes on the peripheral edges of the net body are called side ropes. The size of the safety net (nominal size) is determined by the size of the sidelines; the string that secures the net to the support is called the tether. In addition, the ropes for increasing the strength of the safety net are collectively called as the reinforcing ropes.
In order to ensure the safety performance of the safety net, the selected safety net needs to be subjected to impact test. Before the impact test, a test ball is allowed to freely fall into a test net from a predetermined height by a dedicated test device, and the impact resistance of the safety net is determined based on the degree of breakage. The safety net impact testing machine is used for impact testing of safety nets for high-altitude operation such as buildings. The testing ball is lifted to the height specified by the standard by using the lifting mechanism, then the testing ball is released from the high altitude, the free falling body of the testing ball falls into the safety net to be tested, the falling testing ball converts the gravitational potential energy into the kinetic energy, and the impact resistance of the safety net is judged according to the damage degree of the gravity potential energy.
With respect to the related art in the above, the inventors consider that there are the following drawbacks: in the shock resistance test who carries out the safety net, need hang the safety net that will wait to carry out the test on testing arrangement, testing arrangement is mostly fixing at subaerial stores pylon, be fixed with the couple of a plurality of group row both sides on the stores pylon, before testing, the tester needs to connect fixedly with each group's couple one by one at safety net both sides border that will wait to carry out the test, and need take off the safety net from each group's couple one by one after the test finishes again, the operating time of above-mentioned process is longer, make testing process's efficiency lower, so there is the space of improvement.
Disclosure of Invention
In order to facilitate the tester to open the safety net and hang, promote the efficiency of testing process, this application provides an impact resistance testing machine of safety net.
The application provides a safety net impact resistance testing machine adopts following technical scheme:
a safety net impact resistance testing machine comprises a hanging frame and a frame, wherein the hanging frame comprises a plurality of groups of vertical rods fixed on the ground and cross rods connected with the vertical rods in a horizontally opposite-pulling mode, two groups of first channel steel arranged in a horizontal coplanar mode are fixed on the hanging frame, and two ends of each group of first channel steel are fixedly connected with the vertical rods; notches of the first channel steel of each group are arranged oppositely, a plurality of groups of sliding blocks are inserted into the notches of the first channel steel in a sliding manner, and one group of sliding blocks close to the end part of the first channel steel are fixedly connected; each group of sliding blocks is fixed with a hook, and any two adjacent groups of sliding blocks are connected with connecting belts with the same length; a wall groove is formed in a wing plate on one side, away from the notch, of each group of first channel steel in a penetrating mode, a rack is fixed on the end face, away from the notch, of one side of each group of first channel steel, a group of sliding blocks, away from the end portion of the hanging frame, are integrally connected with a support which is in inserted connection with the wall groove to slide, a motor is installed on the support, and a gear which is in meshed transmission with the rack is coaxially rotated on an output shaft of the motor; the rack is positioned on one side of the hanging rack, a winch is fixed at the upper end of the rack, an inclined rod which is obliquely arranged is fixed at one side of the rack close to the hanging rack, a pulley is rotatably connected to the upper end of the inclined rod, a rope which is rotatably connected with the pulley is wound on the winch, and a test ball is connected to the lower end of the rope; two sides of the safety net to be tested are hung on the hooks.
By adopting the technical scheme, the hanging frame and the rack in the testing machine are both erected on the ground, the hanging frame is composed of a plurality of groups of upright posts and cross rods, and the upright posts and the cross rods are fixedly connected, so that the integral structure of the hanging frame on the ground is stable; when the impact resistance test of the safety net is carried out, a tester places the safety net to be tested on the ground on one side of the hanging frame, one end of the safety net is fixedly connected with the hooks on the sliding blocks on the two sides, the driving motor rotates, the motor drives the bracket to slide along the wall groove through the meshing transmission of the gear and the rack, so that the sliding blocks continuously slide towards the other end of the first channel steel, the sliding blocks of each group are continuously pulled by the connecting belt, the sliding blocks of each group slide along the first channel steel, the tester fixedly connects the hooks of each group with the two sides of the safety net one by one, when the motor moves to the other end of the first channel steel, the hooks of each group support the safety net, in the technical scheme, the safety net continuously moves forwards along with the sliding blocks on the two sides, so that the safety net is in an open state, and the tester can continuously connect and fix the two sides of the safety net to the hooks of each group, meanwhile, the sliding block at the end part is fixedly connected with the first channel steel, so that the safety net can be smoothly hung on the hanging frame; after the completion is hung stretching of safety net, the rope of rolling on the hoist engine this moment is through the rotation of pulley, and the test ball whereabouts of tip under the rope this moment, the gravitational potential energy of test ball turns into kinetic energy, makes the safety net suffer the impact of receiving the test ball, and the damaged condition after suffering the impact according to the safety net this moment assesses the impact resistance ability of safety net, and in the above-mentioned design, the setting of both sides motor, the tester of being convenient for stretches the safety net and hangs, has promoted test process's efficiency.
Preferably, the upper end part and the lower end part of the first channel steel are both provided with a cross rod, the two horizontal ends of the cross rod are fixedly connected with the vertical rod, and the cross rod at the lower end part supports the first channel steel; a plurality of groups of connecting rods are connected between the cross rod at the upper end part and the upper end surface of the first channel steel in a counter-pulling manner.
By adopting the technical scheme, the cross rod is positioned below the first channel steel, two ends of the cross rod are fixedly connected with the vertical rod, and the arrangement of the cross rod improves the structural strength of the hanging rack; meanwhile, the cross rod supports the first channel steel, so that when the test ball falls, the test ball impacts the first channel steel on two sides, and the deformation of the first channel steel is reduced due to the arrangement of the cross rod; the arrangement of each group of connecting rods enables a connection relation to be formed between the first channel steel and the cross rods above the first channel steel, and the structural strength of the first channel steel is further improved.
Preferably, each group is provided with the second channel-section steel below the vertical of first channel-section steel, each group the second channel-section steel with the structure of first channel-section steel is the same, the inside sliding connection of notch of second channel-section steel has a plurality of groups of sliders, simultaneously the motor passes through the drive of rack and pinion structure the slider is followed the notch of second channel-section steel slides.
Through adopting above-mentioned technical scheme, the second channel-section steel is located the below of first channel-section steel, and the second channel-section steel of both sides is the same with the structure of first channel-section steel, and the aforesaid sets up and has realized articulating the safety net on this kind of stores pylon co-altitude position, to the safety net that different tests required, can carry out the selection of two sets of high positions about this moment according to relevant requirement, has promoted the detection range of this kind of testing machine.
Preferably, a plurality of groups of connecting rods are connected between the cross rod below the first channel steel and the upper end face of the second channel steel in a counter-pulling manner.
Through adopting above-mentioned technical scheme, each group's connecting rod has realized the counter-pull with the horizontal pole of first channel-section steel below and second channel-section steel and has been connected, and the setting of each group's connecting rod has realized the body coupling between second channel-section steel and the top horizontal pole, so when the safety net articulates on two sets of second channel-section steels, the test ball falls behind this moment, and the structural strength of two sets of second channel-section steels is higher, and two sets of second channel-section steels are difficult for taking place to warp.
Preferably, a plurality of groups of vertical boards which are distributed at equal intervals are integrally fixed on the rack, and ladders are erected between every two adjacent groups of boards.
Through adopting above-mentioned technical scheme, each group's flat board constitutes the platform that a plurality of groups distribute from top to bottom, will connect each group's flat board from top to bottom with the help of each group's ladder, and the above-mentioned setting is convenient for the tester climbs to the upper end of shelf through each group's ladder, is convenient for overhaul the hoist engine etc..
Preferably, the upper end of the frame is integrally connected with a fixing frame, and the upper end of the fixing frame is fixedly connected with the upper end of the inclined rod.
Through adopting above-mentioned technical scheme, the mount is located the upper end of shelf, and fixed connection between mount and the down tube simultaneously, the setting of mount has promoted the structural strength of down tube, so during rope below hoist and mount test ball, the stable in structure of down tube this moment, the difficult slope that takes place of down tube.
Preferably, the lower end of the rope is connected with an electromagnet which is fixedly tied with a square structure, and the test ball is magnetically connected with the lower end of the electromagnet.
Through adopting above-mentioned technical scheme, for the fixed test ball connected mode of current direct tie, realize the connection to the test ball through the electromagnet among the above-mentioned setting, so to the test ball of different specifications, at this moment changing the in-process, be convenient for separate test ball and electromagnet, promoted the convenience of change process.
Preferably, a flat plate is integrally fixed at the lower end part of each group of the upright stanchions, and a plurality of groups of foundation bolts vertically inserted into the ground penetrate through the flat plate.
By adopting the technical scheme, the lower end parts of the groups of vertical rods are fixed with the flat plates, the flat plates are paved and attached to the ground, and the flat plates are fixed to the ground by means of the groups of foundation bolts, so that the direct contact area between the groups of vertical rods and the ground is increased, and the installation of the groups of vertical rods on the ground is stable.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the impact resistance test of the safety net is carried out, a tester places the safety net to be tested on the ground on one side of the hanging frame, one end of the safety net is fixedly connected with the hooks on the sliding blocks on the two sides, the driving motor rotates, the motor drives the bracket to slide along the wall groove through the meshing transmission of the gear and the rack, so that the sliding blocks continuously slide towards the other end of the first channel steel, the sliding blocks of each group are continuously pulled by the connecting belt, the sliding blocks of each group slide along the first channel steel, the tester fixedly connects the hooks of each group with the two sides of the safety net one by one, when the motor moves to the other end of the first channel steel, the hooks of each group support the safety net, in the technical scheme, the safety net continuously moves forwards along with the sliding blocks on the two sides, so that the safety net is in an open state, and the tester can continuously connect and fix the two sides of the safety net to the hooks of each group, meanwhile, the sliding block at the end part is fixedly connected with the first channel steel, so that the safety net can be smoothly hung on the hanging frame; after the safety net is hung, the rope wound on the winch rotates through the pulley, the test ball at the lower end of the rope falls, the gravitational potential energy of the test ball is converted into kinetic energy, the safety net is impacted by the test ball, and the impact resistance of the safety net is evaluated according to the damage condition of the safety net after being impacted;
2. the cross rod is positioned below the first channel steel, two ends of the cross rod are fixedly connected with the vertical rod, and the arrangement of the cross rod improves the structural strength of the hanging rack; meanwhile, the cross rod supports the first channel steel, so that when the test ball falls, the test ball impacts the first channel steel on two sides, and the deformation of the first channel steel is reduced due to the arrangement of the cross rod; the arrangement of each group of connecting rods enables the first channel steel and the transverse rod above the first channel steel to form a connection relation, and the structural strength of the first channel steel is further improved; the second channel steel is positioned below the first channel steel, the structures of the second channel steel on two sides are the same as those of the first channel steel, the safety net is hung on the hanging frame at different height positions, for the safety nets with different test requirements, the upper and lower groups of height positions can be selected according to related requirements, and the detection range of the testing machine is widened;
3. the lower tip connection latch of rope is fixed with the electromagnet of square structure, and the lower tip magnetism of test ball and electromagnet is inhaled and is connected, and for the fixed test ball connected mode of current direct latch, realize the connection to the test ball through the electromagnet among the above-mentioned setting, the event is to the test ball of different specifications, and the in-process is being changed this moment in carrying out, is convenient for separate test ball and electromagnet, has promoted the convenience of change process.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is an enlarged view at B in FIG. 1;
FIG. 4 is a schematic diagram of the overall structure from another perspective in the embodiment of the present application;
fig. 5 is an enlarged view at C in fig. 4.
Description of reference numerals: 1. a hanger; 11. erecting a rod; 111. a flat plate; 112. anchor bolts; 12. a cross bar; 121. a connecting rod; 2. a shelf; 21. a winch; 22. a diagonal bar; 221. a pulley; 23. a rope; 231. an electromagnet; 24. plate surface; 25. a ladder; 26. a fixed mount; 3. a ground surface; 4. a first channel steel; 41. a slider; 411. hooking; 42. a connecting belt; 43. a wall groove; 44. a rack; 5. a support; 51. a motor; 52. a gear; 6. testing the ball; 7. a second channel steel; 8. a safety net is provided.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses safety net impact resistance testing machine. Referring to fig. 1, the testing machine is installed on the ground 3, the ground 3 is horizontally arranged, the safety net impact resistance testing machine comprises a hanging rack 1 and a rack 2, the hanging rack 1 comprises a plurality of groups of vertical rods 11 fixed on the ground 3 and cross rods 12 for horizontally oppositely pulling and connecting the vertical rods 11, and the vertical rods 11 and the cross rods 12 are all steel bars made of solid materials. Two groups of first channel steel 4 which are arranged in a horizontal coplanar mode are fixed on the hanging rack 1, the length of the two groups of first channel steel 4 is matched with that of the hanging rack 1, and two ends of each group of first channel steel 4 are fixedly connected with the vertical rod 11. The lower end of each group of upright rods 11 is integrally fixed with a flat plate 111, and a plurality of groups of anchor bolts 112 vertically inserted into the ground penetrate through the flat plate 111.
The rack 2 is located on one side of the hanging rack 1, a plurality of groups of vertical boards 24 distributed at equal intervals are integrally fixed on the rack 2, and ladders 25 are erected between the boards 24. A winch 21 is fixed at the upper end of the frame 2, and the winch 21 is positioned on the uppermost plate surface 24; the rack 2 is fixed with the down tube 22 that the slope set up near one side of stores pylon 1, the upper end body coupling of rack 2 has the mount 26, the upper end of mount 26 with the upper end fixed connection of down tube 22. The upper end of the diagonal rod 22 is rotatably connected with a pulley 221, the winch 21 is wound with a rope 23 rotatably connected with the pulley 221, the lower end of the rope 23 is connected with an electromagnet 231, the electromagnet 231 is of a square structure, and the lower end of the electromagnet 231 is magnetically adsorbed with a test ball 6.
Referring to fig. 1 and 2, a second channel steel 7 is installed vertically below each group of the first channel steel 4, and the structure of each group of the second channel steel 7 is the same as that of the first channel steel 4, which is described with reference to the structure of the second channel steel 7. The notches of the first channel steel 4 of each group are arranged oppositely, a plurality of groups of sliding blocks 41 are inserted into the notches of the first channel steel 4 of each group in a sliding manner, the sliding blocks 41 are in a T-shaped structure, each group of sliding blocks 41 is inserted into the notches of the first channel steel 4 in a matched manner, and one group of sliding blocks 41 close to the end part of the first channel steel 4 are fixedly connected by means of screws; a hook 411 is fixed at one end of each group of sliding blocks 41 extending out of the notch of the first channel steel 4, and connecting belts 42 with the same length are connected to any two adjacent groups of sliding blocks 41; each group of the first channel steel 4 is provided with a wall groove 43 on a wing plate at one side departing from the notch, and the extending direction of the wall groove 43 is parallel to the extending direction of the first channel steel 4. Two sides of the safety net 8 to be tested are hung on the hooks 411.
Referring to fig. 1 and 3, a rack 44 is fixed on an end surface of one side of each group of the first channel steel 4, which is arranged opposite to the first channel steel 4, and the length of the rack 44 is the same as that of the first channel steel 4; a group of sliding blocks 41 far away from the end part of the hanging rack 1 are integrally connected with a bracket 5 which is inserted into the wall groove 43 for sliding, the bracket 5 is of a Z-shaped structure, a motor 51 is installed on a horizontal wing plate of the bracket 5, an output shaft of the motor 51 penetrates through the direct vertical wing plate, and a gear 52 which is meshed with the rack 44 for transmission is coaxially rotated on the output shaft of the motor 51.
Referring to fig. 4 and 5, the upper end and the lower end of the first channel steel 4 are both provided with a cross bar 12, the two horizontal ends of the cross bar 12 are fixedly connected with the vertical rods 11, and the cross bar 12 at the lower end supports the first channel steel 4, so that the structural strength of the first channel steel 4 is improved; a plurality of groups of connecting rods 121 are connected between the cross rod 12 at the upper end part and the upper end surface of the first channel steel 4 in a counter-pulling manner, and the groups of connecting rods 121 are distributed at equal intervals. A plurality of groups of connecting rods 121 are connected between the cross rod 12 below the first channel steel 4 and the upper end face of the second channel steel 7 in a counter-pulling manner.
The safety net impact resistance testing machine of the embodiment of the application has the implementation principle that:
the safety net impact resistance testing machine is installed on the ground 3, each group of upright rods 11 is vertically erected on the ground 3, and foundation bolts 112 penetrate through a flat plate 111 and are inserted into the ground. Each group of upright rods 11 and the cross rod 12 are welded and fixed, the first channel steel 4 and the second channel steel 7 are installed, and the cross rod 12 supports the first channel steel 4. Each set of the connecting rods 121 connects the first channel 4 and the second channel 7.
When the impact resistance test of the safety net 8 is performed, at this time, a tester places the safety net 8 to be tested on the ground 3 on one side of the hanger 1, at this time, one end of the safety net 8 is fixedly connected with the hooks 411 on the sliders 41 on the two sides, at this time, two sets of motors 51 are driven to rotate, the motors 51 are driven to rotate through the meshing transmission of the gears 52 and the racks 44, the bracket 5 slides along the wall groove 43, the sliders 41 continuously slide towards the other end of the first channel steel 4, at this time, the sliders 41 are continuously pulled by the connecting belt 42, the sliders 41 slide along the first channel steel 4, the tester fixedly connects the hooks 411 with the two sides of the safety net 8 one by one, when the motors 51 move to the other end of the first channel steel 4, the hooks 411 support the safety net 8, in the technical scheme, the safety net 8 continuously moves along with the sliders 41 on the two sides, so that the safety net 8 is in a spread state, the tester can continuously hook and fix the two sides of the safety net 8 to the hooks 411, and meanwhile, the sliding block 41 at the end part is fixedly connected with the first channel steel 4, so that the safety net 8 can be smoothly hung on the hanging frame 1; for the safety nets 8 with different testing requirements, the safety nets 8 can be hung on the two groups of second channel steel 7, and the height of the safety nets 8 is reduced at the moment.
After the safety net 8 is hung, the rope 23 wound on the winch 21 rotates through the pulley 221, and the electromagnet 231 below the test ball 6 at the lower end of the rope 23 is powered on or off; when the test ball 6 is dropped, the gravitational potential energy of the test ball 6 is converted into kinetic energy, so that the safety net 8 is impacted by the test ball 6, and the impact resistance of the safety net 8 is evaluated according to the damage condition of the safety net 8 after the impact. After the impact resistance test is finished, the electromagnet 231 magnetically attracts the test ball 6, so that the test ball 6 is smoothly lifted; and drives two sets of motors 51 again, so that the motors 51 slide along the racks 44, the sliding blocks 41 of each set gradually get close, and at the moment, the tester takes down the two sides of the safety net 8 from the hooks 411 of each set, and the whole process of testing the safety net 8 is completed. In the above-mentioned design, the setting of both sides motor 51, the tester of being convenient for opens safety net 8 and hangs, has promoted the efficiency of testing process.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a safety net impact resistance testing machine which characterized in that: the hanging rack comprises a hanging rack (1) and a rack (2), wherein the hanging rack (1) comprises a plurality of groups of upright posts (11) fixed on the ground (3) and cross rods (12) horizontally connected with the upright posts (11) in a split manner, two groups of first channel steel (4) horizontally arranged in a coplanar manner are fixed on the hanging rack (1), and two ends of the first channel steel (4) are fixedly connected with the upright posts (11); the notches of the first channel steel (4) of each group are oppositely arranged, a plurality of groups of sliding blocks (41) are inserted into the notches of the first channel steel (4) of each group in a sliding manner, and the sliding blocks (41) close to the end part of the first channel steel (4) are fixedly connected; each group of sliding blocks (41) is fixed with a hook (411), and any two adjacent groups of sliding blocks (41) are connected with connecting belts (42) with the same length; wall grooves (43) are formed in a wing plate on one side, away from the notch, of each group of first channel steel (4) in a penetrating mode, racks (44) are fixed on the end face, away from the notch, of one side of each group of first channel steel (4), a group of sliding blocks (41) far away from the end portion of the hanger (1) are integrally connected with a support (5) which is connected with the wall grooves (43) in a plugging and sliding mode, a motor (51) is installed on the support (5), and a gear (52) which is in meshing transmission with the racks (44) is coaxially rotated on an output shaft of the motor (51); the rack (2) is positioned on one side of the hanging rack (1), a winch (21) is fixed at the upper end of the rack (2), an inclined rod (22) which is obliquely arranged is fixed at one side, close to the hanging rack (1), of the rack (2), a pulley (221) is rotatably connected at the upper end of the inclined rod (22), a rope (23) which is rotatably connected with the pulley (221) is wound on the winch (21), and a testing ball (6) is connected at the lower end of the rope (23); two sides of the safety net (8) to be tested are hung on the hooks (411).
2. The safety net impact resistance tester of claim 1, wherein: the upper end and the lower end of the first channel steel (4) are respectively provided with a cross rod (12), the horizontal two ends of each cross rod (12) are fixedly connected with the vertical rods (11), and the cross rods (12) at the lower ends support the first channel steel (4); a plurality of groups of connecting rods (121) are connected between the cross rod (12) at the upper end part and the upper end surface of the first channel steel (4) in a counter-pulling manner.
3. The safety net impact resistance tester of claim 2, wherein: each group the vertical below of first channel-section steel (4) is provided with second channel-section steel (7), each group second channel-section steel (7) with the structure of first channel-section steel (4) is the same, the inside sliding connection of notch of second channel-section steel (7) has a plurality of groups slider (41), simultaneously motor (51) pass through the drive of rack and pinion structure slider (41) are followed the notch of second channel-section steel (7) slides.
4. The safety net impact resistance tester of claim 3, wherein: a plurality of groups of connecting rods (121) are connected between the upper end faces of the cross rod (12) below the first channel steel (4) and the second channel steel (7) in a counter-pulling manner.
5. The safety net impact resistance tester of claim 4, wherein: a plurality of groups of vertical boards (24) distributed at equal intervals are integrally fixed on the shelf (2), and ladders (25) are arranged between every two adjacent groups of boards (24).
6. The safety net impact resistance tester of claim 5, wherein: the upper end of the frame (2) is integrally connected with a fixing frame (26), and the upper end of the fixing frame (26) is fixedly connected with the upper end of the inclined rod (22).
7. The safety net impact resistance tester of claim 6, wherein: the lower end of the rope (23) is connected with an electromagnet (231) which is fixedly tied and provided with a square structure, and the test ball (6) is connected with the lower end of the electromagnet (231) in a magnetic attraction manner.
8. The safety net impact resistance tester of claim 7, wherein: the lower end of each group of upright rods (11) is integrally fixed with a flat plate (111), and a plurality of groups of foundation bolts (112) vertically inserted into the ground penetrate through the flat plate (111).
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