CN114964688A - Impact resistance test system of cable bridge support - Google Patents
Impact resistance test system of cable bridge support Download PDFInfo
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- CN114964688A CN114964688A CN202210621058.2A CN202210621058A CN114964688A CN 114964688 A CN114964688 A CN 114964688A CN 202210621058 A CN202210621058 A CN 202210621058A CN 114964688 A CN114964688 A CN 114964688A
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- 238000012360 testing method Methods 0.000 title claims abstract description 10
- 238000002474 experimental method Methods 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims description 69
- 238000009863 impact test Methods 0.000 claims description 21
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 3
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- 238000000034 method Methods 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 241000976416 Isatis tinctoria subsp. canescens Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Abstract
The invention discloses an impact resistance test system of a cable bridge support, which comprises an experiment platform, wherein a transverse cable bridge support mounting beam is fixed above the experiment platform through beam supports at two sides; the cable bridge support mounting beam is provided with a plurality of mounting holes; the cable bridge is parallel to the lower part of the cable bridge support mounting beam, the cable bridge is fixedly mounted on a plurality of bridge supports, the upper end of each bridge support is fixedly connected with a fixing seat, each fixing seat is provided with a bolt locking hole, and each bolt locking hole is locked on each mounting hole in the cable bridge support mounting beam through a locking bolt, so that the cable bridge is fixed; the impact mode of centrifugal escape gets rid of the limitation of gravitational acceleration and the length of the swing arm, and can generate enough impact kinetic energy in a limited space.
Description
Technical Field
The invention belongs to the field of impact resistance tests of cable bridges.
Background
The cable bridge and the cable bridge bracket of special operation units (such as nuclear power stations, steel plants, heavy industrial plants and the like) have severe requirements on the impact resistance of the structure;
what current cable crane span structure impact experiment generally adopted is that the mode of gravity pendulum realizes strikeing, and the impact kinetic energy that this kind of gravity pendulum can provide receives gravitational acceleration and swing arm length restriction, and if the swing arm overlength then can occupy experimental apparatus's space, consequently necessarily wades the design one kind and can provide enough impact kinetic energy and do not excessively occupy the impact experimental apparatus space.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides an impact resistance test system of a cable bridge support, which can provide enough impact kinetic energy in a limited space.
The technical scheme is as follows: in order to achieve the purpose, the impact resistance test system of the cable bridge support comprises an experiment platform, wherein a transverse cable bridge support mounting beam is fixed above the experiment platform through beam supports on two sides; the cable bridge support mounting beam is provided with a plurality of mounting holes;
the cable bridge is parallel to the lower part of the cable bridge support mounting beam, the cable bridge is fixedly mounted on a plurality of bridge supports, the upper end of each bridge support is fixedly connected with a fixing seat, each fixing seat is provided with a bolt locking hole, and each bolt locking hole is locked on each mounting hole in the cable bridge support mounting beam through a locking bolt, so that the cable bridge is fixed;
an impact test device is arranged below the cable bridge and can impact the side part of the cable bridge with preset kinetic energy.
Further, the impact test device comprises a floating platform, and a left semicircular arc rolling rail and a right semicircular arc rail which have the same inner diameter are arranged above the floating platform; when the left semicircular arc rolling rail and the right semicircular arc rail are coaxial, the left semicircular arc rolling rail and the right semicircular arc rail are spliced into a circular rolling rail;
a kinetic energy output motor is fixedly mounted on the floating platform through a motor bracket, and an output shaft of the kinetic energy output motor and the circular ring rolling track are coaxial; the output shaft is coaxially and integrally connected with a square shaft with a square section through a connecting disc, two a guide holes penetrate through the square shaft along the radial direction of a circular ring rolling track, slide rods movably penetrate through the two a guide holes, one ends of the two slide rods are fixedly connected with a first roller seat together, a collision impact roller made of solid metal is rotatably mounted on the first roller seat through a bearing, a spring is sleeved on the slide rods, and two ends of the spring elastically press the square shaft and the first roller seat respectively, so that the collision impact roller is in rolling contact with the inner wall of the circular ring rolling track;
one end of the square shaft, which is far away from the collision impact roller, is vertically and fixedly connected with a rotary arm, the tail end of the rotary arm is fixedly connected with a second roller seat, a counterweight roller is rotatably mounted on the second roller seat through a bearing, and the counterweight roller is in rolling tangency with the inner wall of the circular ring rolling track;
the rotation of the output shaft enables the square shaft to drive the counterweight idler wheel and the collision impact idler wheel to roll along the inner wall of the circular ring rolling track in the anticlockwise direction;
the outer arc surface of the left semi-arc rolling rail is fixedly connected with the floating platform through a first support;
the floating platform is fixedly provided with a bearing seat, a track deviation shaft is rotatably arranged in the bearing seat through a bearing, a straight line where one side of the clockwise end of the outer cambered surface of the right semi-circular arc rail is located is marked as a reference axis, and the axis of the track deviation shaft is superposed with the reference axis; one end of the track deviation shaft is fixedly connected with a spring connecting disc, the side part of the spring connecting disc is fixedly connected with the outer wall surface of the right semicircular arc rail through a connecting arm, so that the right semicircular arc rail is synchronous with the track deviation shaft, and the clockwise rotation of the right semicircular arc rail along the track deviation shaft can enable the counterclockwise end of the right semicircular arc rail and the clockwise end of the left semicircular arc rolling rail to form a roller escape opening;
when the collision impact roller rotating along the axis of the output shaft anticlockwise reaches the formed roller escape opening, the collision impact roller escapes upwards from the roller escape opening along the direction of the sliding rod under the action of centrifugal force and impacts the side part of the cable bridge.
Furthermore, a torsion spring is sleeved on the rail deflection shaft, one end of the torsion spring is fixedly connected with the bearing seat, and the other end of the torsion spring is fixedly connected with the spring connecting disc; the torsion spring forms a clockwise torsion force on the spring connecting disc.
The right semicircular arc rail is matched with the right semicircular arc rail in a sliding way, and the right semicircular arc rail cannot rotate clockwise along the rail deviation shaft under the limit of the arc trigger block; the arc-shaped trigger block can move along the axial direction of the circular ring rolling track to be separated from the outer arc surface of the right semicircular arc track;
one end of the square shaft, which is far away from the output shaft, is fixedly connected with an external thread screw rod coaxially, a screw rod nut is in transmission connection with the external thread screw rod, and the internal thread of the screw rod nut is in threaded transmission fit with the external thread screw rod; one side of the screw nut is fixedly connected with a guide hole seat, a guide hole b with the axis parallel to the screw nut is arranged on the guide hole seat, the screw nut further comprises a fixed guide rod which penetrates through the guide hole b in a sliding manner, and the fixed guide rod is fixed on the floating platform through a fixed support;
one side of the guide hole seat is fixedly connected with the side part of the arc-shaped trigger block through a synchronous support, so that the arc-shaped trigger block and the screw rod nut move synchronously.
Furthermore, a limiting roller is arranged below the right semi-circular arc rail and is rotatably installed on the lifting roller support through a bearing; the floating platform is fixedly provided with a lifter, the lifting roller support is fixedly arranged on a lifting rod of the lifter, when the lifting rod is in a retraction state and a roller escape opening is formed, the lower part outer arc surface of the right semi-circular arc rail is tangent to the rolling of the limiting roller.
Furthermore, one end of each slide bar, which is far away from the first roller seat, is fixedly connected with an a limiting disc with the diameter larger than the inner diameter of the a guide hole; when the collision impact roller rolls and is tangent to the inner wall of the circular ring rolling track, a spacing disc and the square shaft form a space.
Furthermore, a b limiting disc is arranged at the tail end of the external thread screw rod;
furthermore, two transverse guide rods penetrating through the channel are arranged on the floating platform along the length direction of the cable bridge, the floating platform further comprises the transverse guide rods coaxially movably penetrating through the guide rods penetrating through the channel, and two ends of each transverse guide rod are fixedly connected with the beam support.
Has the advantages that: the invention has simple structure, when the collision impact roller which moves along the inner wall of the circular rolling track in the anticlockwise direction reaches the formed roller escape opening, the collision impact roller instantaneously escapes upwards from the roller escape opening along the direction of the sliding rod under the action of centrifugal force and impacts the side part of the cable bridge frame, thereby realizing the collision of preset kinetic energy; finally, the damage degree of the collision of the cable bridge and the bridge bracket at the preset kinetic energy is evaluated to judge whether the expectation of the preset structural strength is reached;
the impact mode of centrifugal escape gets rid of the limitation of gravitational acceleration and the length of the swing arm, and can generate enough impact kinetic energy in a limited space.
Drawings
FIG. 1 is an overall schematic view of a cable tray having been secured to the experimental setup;
FIG. 2 is a schematic illustration of the cable tray and cable tray support of FIG. 1 with the impact test hidden;
FIG. 3 is a schematic view of a cable tray and cable tray support awaiting impact testing;
FIG. 4 is a cut-away side view of the preparation process of step one at the end (the left and right semi-circular rolling rails are joined together to form a circular rolling track);
FIG. 5 is a perspective view of FIG. 4;
fig. 6 is a schematic perspective view of the impact test apparatus in a first state (a circular rolling track is formed by splicing a left semicircular arc rolling track and a right semicircular arc track);
FIG. 7 is a cut-away side view during "step two" (the condition in which roller escape openings have been formed);
FIG. 8 is an enlarged schematic view taken at 3 of FIG. 7;
FIG. 9 is a perspective view of FIG. 7;
FIG. 10 is a perspective view of the impact tester in a second state (a state in which a roller escape opening has been formed)
FIG. 11 is a schematic view of a first detachable part of the device;
FIG. 12 is a schematic view of a second detachable part of the device;
FIG. 13 is a schematic view of a third disassembled part of the device;
fig. 14 is a structural schematic diagram of a fourth disassembling component of the device.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The impact resistance test system for the cable bridge support shown in the attached drawings 1 to 14 comprises an experiment platform 7, wherein a transverse cable bridge support mounting beam 4 is fixed above the experiment platform 7 through cross beam supports 6 on two sides; the cable bridge support mounting beam 4 is provided with a plurality of mounting holes 5;
the cable bridge frame 11 is parallel to the lower portion of a cable bridge frame support mounting beam 4, the cable bridge frame 11 is fixedly mounted on a plurality of bridge frame supports 8, the upper end of each bridge frame support 8 is fixedly connected with a fixing seat 10, each fixing seat 10 is provided with a bolt locking hole 9, each bolt locking hole 9 is locked on each mounting hole 5 on the cable bridge frame support mounting beam 4 through a locking bolt, and therefore the cable bridge frame 11 is fixed;
an impact test device 2 is arranged below the cable bridge 11, and the impact test device 2 can impact the bridge side 11.1 of the cable bridge 11 with preset kinetic energy; as shown in FIG. 1;
the impact test device 2 comprises a floating platform 12, and a left semicircular arc rolling rail 1.1 and a right semicircular arc rail 1.2 which have the same inner diameter are arranged above the floating platform 12; when the left semicircular arc rolling rail 1.1 and the right semicircular arc rail 1.2 are coaxial, the left semicircular arc rolling rail 1.1 and the right semicircular arc rail 1.2 are spliced into a circular rolling rail 1; as shown in fig. 4, 5 and 6;
a kinetic energy output motor 39 is fixedly arranged on the floating platform 12 through a motor bracket 714, and an output shaft 38 of the kinetic energy output motor 39 is coaxial with the circular ring rolling track 1; the output shaft 38 is coaxially and integrally connected with a square shaft 37 with a square section through a connecting disc 40, two a guide holes 50 penetrate through the square shaft 37 along the radial direction of the circular rolling track 1, slide rods 21 movably penetrate through the two a guide holes 50, one ends of the two slide rods 21 are fixedly connected with a first roller seat 20 together, a collision impact roller 15 made of solid metal materials is rotatably installed on the first roller seat 20 through a bearing, a spring 22 is sleeved on the slide rod 21, and two ends of the spring 22 elastically press the square shaft 37 and the first roller seat 20 respectively, so that the collision impact roller 15 is in rolling contact with the inner wall of the circular rolling track 1; one end of each sliding rod 21, which is far away from the first roller seat 20, is fixedly connected with an a limiting disc 43 with the diameter larger than the inner diameter of the a guide hole 50;
when the collision impact roller 15 is tangent to the inner wall of the circular rolling track 1 in a rolling manner, a spacing disc 43 and the square shaft 37 form a spacing;
one end of the square shaft 37, which is far away from the collision impact roller 15, is vertically and fixedly connected with a rotary arm 23, the tail end of the rotary arm 23 is fixedly connected with a second roller seat 20, a counterweight roller 14 is rotatably mounted on the second roller seat 20 through a bearing, and the counterweight roller 14 is in rolling tangency with the inner wall of the circular rolling track 1;
the rotation of the output shaft 38 enables the square shaft 37 to drive the counterweight idler wheel 14 and the collision impact idler wheel 15 to roll along the inner wall of the circular rolling track 1 in the anticlockwise direction;
the outer arc surface of the left semi-arc rolling rail 1.1 is fixedly connected with the floating platform 12 through a first bracket 98;
a bearing seat 29 is fixedly installed on the floating platform 12, a track deviation shaft 18 is rotatably installed in the bearing seat 29 through a bearing 18, a straight line where one side of the clockwise end of the outer arc surface of the right semicircular arc rail 1.2 is located is marked as a reference axis 01, and the axis of the track deviation shaft 18 is overlapped with the reference axis 01; one end of the track deviation shaft 18 is fixedly connected with a spring connecting disc 28, the side part of the spring connecting disc 28 is fixedly connected with the outer wall surface of the right semi-circular arc rail 1.2 through a connecting arm 31, so that the right semi-circular arc rail 1.2 is synchronous with the track deviation shaft 18, and the right semi-circular arc rail 1.2 rotates clockwise along the track deviation shaft 18 to enable a roller escape opening 16 to be formed between the counterclockwise end of the right semi-circular arc rail 1.2 and the clockwise end of the left semi-circular arc rolling rail 1.1;
when the impact roller 15 rotating counterclockwise along the axis of the output shaft 38 reaches the formed roller escape opening 16, the impact roller 15 escapes from the roller escape opening 16 upward in the direction of the slide bar 21 under the action of centrifugal force and hits the bridge side 11.1 of the cable bridge 11; (see fig. 7, 8, 9, 10);
a torsion spring 30 is sleeved on the track deviation shaft 18, one end of the torsion spring 30 is fixedly connected with a bearing seat 29, and the other end of the torsion spring 30 is fixedly connected with a spring connecting disc 28; the torsion spring 30 forms a clockwise torsion force on the spring connecting plate 28;
the arc-shaped trigger block 17 is attached to the right side of the right semicircular arc rail 1.2, the block inner arc surface 17.1 of the arc-shaped trigger block 17 is in sliding fit with the outer arc surface of the right semicircular arc rail 1.2, and the right semicircular arc rail 1.2 cannot rotate clockwise along the track off-axis 18 under the limit of the arc-shaped trigger block 17; the arc-shaped trigger block 17 can move along the axial direction of the circular ring rolling track 1 until the arc-shaped trigger block is separated from the outer arc surface of the right semi-circular arc track 1.2;
one end of the square shaft 37, which is far away from the output shaft 38, is fixedly connected with an external thread screw rod 24 coaxially, the external thread screw rod 24 is in transmission connection with a screw rod nut 25, and an internal thread 80 of the screw rod nut 25 is in threaded transmission fit with the external thread screw rod 24; one side of the screw nut 25 is fixedly connected with a guide hole seat 41, the guide hole seat 41 is provided with a b guide hole 41 with the axis parallel to the screw nut 25, the floating platform also comprises a fixed guide rod 36 which passes through the b guide hole 41 in a sliding way, and the fixed guide rod 36 is fixed on the floating platform 12 through a fixed bracket;
one side of the guide hole seat 41 is fixedly connected with the side part of the arc-shaped trigger block 17 through a synchronous bracket 70, so that the arc-shaped trigger block 17 and the screw nut 25 move synchronously;
a limiting roller 32 is arranged below the right semi-circular arc rail 1.2, and the limiting roller 32 is rotatably arranged on a lifting roller support 35 through a bearing; a lifter 33 is fixedly arranged on the floating platform 12, a lifting roller support 35 is fixedly arranged on a lifting rod 34 of the lifter 33, and when the lifting rod 34 is in a retraction state and a roller escape opening 16 is formed, the outer arc surface of the lower part of the right semi-circular arc rail 1.2 is tangent to the limiting roller 32 in a rolling manner;
the tail end of the external thread screw rod 24 is provided with a limiting disc 44;
the floating platform 12 is provided with two transverse guide rod penetrating channels 13 along the length direction of the cable bridge 11, and further comprises transverse guide rods 800 coaxially movably penetrating the guide rods penetrating the channels 13, and two ends of each transverse guide rod 800 are fixedly connected with the beam support 6;
the working method of the impact test system of the device comprises the following steps:
step one, a preparation process:
in an initial state, the left semicircular arc rolling rail 1.1 and the right semicircular arc rail 1.2 have the same axle center, the left semicircular arc rolling rail 1.1 and the right semicircular arc rail 1.2 are spliced into a circular ring rolling rail 1, and the torsion spring 30 forms clockwise torsion on the spring connecting disc 28, so that the right semicircular arc rail 1.2 has a tendency of deflecting along the rail deflection axis 18 in the clockwise direction; because the block inner arc surface 17.1 of the arc-shaped trigger block 17 is in sliding fit with the outer arc surface of the right semi-arc rail 1.2 in the initial state, the right semi-arc rail 1.2 cannot rotate clockwise along the track offset shaft 18 under the limit of the arc-shaped trigger block 17; and the lifting rod 34 is in a retracted state in the initial state;
fixedly mounting a cable bridge 11 waiting for an impact test on a plurality of bridge supports 8, and then locking each bolt locking hole 9 on the plurality of bridge supports 8 on each mounting hole 5 on a cable bridge support mounting beam 4 through a locking bolt, so that the cable bridge 11 is fixed; at the moment, the circular rolling track 1 is just under the bridge side part 11.1 on the right side of the cable bridge 11;
step two, a collision test process:
the kinetic energy output motor 39 is controlled to provide an anticlockwise torsion force to the output shaft 38, so that the output shaft 38 drives the counterweight roller 14 and the collision impact roller 15 to roll along the inner wall of the circular rolling track 1 in an anticlockwise direction through the square shaft 37, because the output rotation speed of the output shaft 38 has a process of gradually accelerating from zero, the movement speed of the counterweight roller 14 and the collision impact roller 15 driven by the square shaft 37 and both roll along the inner wall of the circular rolling track 1 in the anticlockwise direction is gradually increased, so that the kinetic energy of the collision impact roller 15 is gradually increased, because the output power of the kinetic energy output motor 39 is constant, the rotation speed of the output shaft 38 finally tends to a stable value along with the continuous anticlockwise rotation of the output shaft 38, because the counterweight roller 14 and the collision impact roller 15 are synchronous with the output shaft 38, when the rotation speed of the output shaft 38 is stable, the kinetic energy of the collision impact roller 15 moving along the inner wall of the circular rolling track 1 in the anticlockwise direction tends to be stable, the stable kinetic energy of the collision impact roller 15 and the counterweight roller 14 at this time is the collision kinetic energy required in the subsequent process;
meanwhile, the external thread screw rod 24 synchronously rotates anticlockwise along with the output shaft 38, the anticlockwise rotation of the external thread screw rod 24 can drive the screw nut 25 to do linear motion gradually far away from the square shaft 37 under the guidance of the fixed guide rod 36, and the arc-shaped trigger block 17 and the screw nut 25 are synchronous, so that the arc-shaped trigger block 17 can displace along the axial direction of the circular ring rolling track 1 along with the anticlockwise rotation of the output shaft 38 tending to stabilize the rotating speed, and the arc-shaped trigger block 17 and the outer arc surface of the right semicircular arc track 1.2 can relatively slide along the axial direction; until the arc trigger block 17 is separated from the outer arc surface of the right semicircular arc rail 1.2 along the axial direction of the circular rolling rail 1, at the moment that the arc trigger block 17 is separated from the outer arc surface of the right semicircular arc rail 1.2 along the axial direction of the circular rolling rail 1, under the clockwise torsion of the torsion spring 30, the right semicircular arc rail 1.2 instantaneously rotates clockwise along the axis of the rail deviation shaft 18 until the outer arc surface of the lower part of the right semicircular arc rail 1.2 is in rolling tangency with the limit roller 32, so that a roller escape opening 16 is instantaneously formed between the clockwise needle end of the right semicircular arc rail 1.2 and the clockwise needle end of the left semicircular arc rolling rail 1.1, and then when the collision impact roller 15 which originally moves along the inner wall of the circular rolling rail 1 in the anticlockwise direction reaches the formed roller escape opening 16, the collision impact roller 15 instantaneously escapes upwards from the roller escape opening 16 along the direction of the sliding rod 21 under the action of centrifugal force and impacts the side part 11.1 of the bridge frame of the cable 11, thereby realizing collision with preset kinetic energy;
finally, the damage degree of the cable bridge 11 and the bridge bracket 8 in the collision with the preset kinetic energy is evaluated to judge whether the expectation of the preset structural strength is achieved;
subsequently, only by controlling the lifting rod 34 to extend upwards, the left semi-circular arc rolling rail 1.1 and the right semi-circular arc rail 1.2 can be spliced into a circular rolling rail 1 again.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (8)
1. Impact resistance test system of cable testing bridge support, its characterized in that: the device comprises an experiment platform (7), wherein a transverse cable bridge support mounting beam (4) is fixed above the experiment platform (7) through beam supports (6) on two sides; a plurality of mounting holes (5) are formed in the cable bridge bracket mounting beam (4);
the cable bridge frame (11) waiting for an impact test is further included, the cable bridge frame (11) is parallel to the lower portion of the cable bridge frame support mounting beam (4), the cable bridge frame (11) is fixedly mounted on a plurality of bridge frame supports (8), the upper end of each bridge frame support (8) is fixedly connected with a fixing seat (10), each fixing seat (10) is provided with a bolt locking hole (9), each bolt locking hole (9) is locked on each mounting hole (5) in the cable bridge frame support mounting beam (4) through a locking bolt, and therefore the cable bridge frame (11) is fixed;
an impact test device (2) is arranged below the cable bridge (11), and the impact test device (2) can impact the bridge side (11.1) of the cable bridge (11) with preset kinetic energy.
2. The impact testing system of claim 1, wherein: the impact test device (2) comprises a floating platform (12), and a left semicircular arc rolling rail (1.1) and a right semicircular arc rail (1.2) which have the same inner diameter are arranged above the floating platform (12); when the left semicircular arc rolling rail (1.1) and the right semicircular arc rail (1.2) are coaxial, the left semicircular arc rolling rail (1.1) and the right semicircular arc rail (1.2) are spliced into a circular rolling rail (1);
a kinetic energy output motor (39) is fixedly mounted on the floating platform (12) through a motor support (714), and an output shaft (38) of the kinetic energy output motor (39) is coaxial with the circular ring rolling track (1); the output shaft (38) is coaxially and integrally connected with a square shaft (37) with a square cross section through a connecting disc (40), two a guide holes (50) penetrate through the square shaft (37) along the radial direction of a circular ring rolling track (1), slide bars (21) movably penetrate through the two a guide holes (50), one ends of the two slide bars (21) are fixedly connected with a first roller seat (20) together, a collision impact roller (15) made of solid metal is rotatably installed on the first roller seat (20) through a bearing, a spring (22) is sleeved on the slide bars (21), and two ends of the spring (22) elastically press the square shaft (37) and the first roller seat (20) respectively, so that the collision impact roller (15) is tangential to the inner wall of the circular ring rolling track (1) in a rolling mode;
one end, far away from the collision impact roller (15), of the square shaft (37) is vertically and fixedly connected with a rotary arm (23), the tail end of the rotary arm (23) is fixedly connected with a second roller seat (20), a counterweight roller (14) is rotatably mounted on the second roller seat (20) through a bearing, and the counterweight roller (14) is in rolling tangency with the inner wall of the circular ring rolling track (1);
the rotation of the output shaft (38) enables the square shaft (37) to drive the counterweight idler wheel (14) and the collision impact idler wheel (15) to roll along the inner wall of the circular rolling track (1) in the anticlockwise direction;
the outer arc surface of the left semi-arc rolling rail (1.1) is fixedly connected with the floating platform (12) through a first support (98);
a bearing seat (29) is fixedly installed on the floating platform (12), a track deviation shaft (18) is installed in the bearing seat (29) through a bearing (18) in a rotating mode, a straight line where one side of the clockwise end of the outer arc surface of the right semi-circular arc rail (1.2) is located is marked as a reference axis (01), and the axis of the track deviation shaft (18) is overlapped with the reference axis (01); one end of the track deviation shaft (18) is fixedly connected with a spring connecting disc (28), the side part of the spring connecting disc (28) is fixedly connected with the outer wall surface of the right semicircular arc rail (1.2) through a connecting arm (31), so that the right semicircular arc rail (1.2) and the track deviation shaft (18) are synchronous, and the clockwise rotation of the right semicircular arc rail (1.2) along the track deviation shaft (18) can enable the counterclockwise end of the right semicircular arc rail (1.2) and the clockwise end of the left semicircular arc rolling rail (1.1) to form a roller escape opening (16);
when the impact roller (15) rotating along the axis of the output shaft (38) anticlockwise reaches the formed roller escape opening (16), the impact roller (15) escapes from the roller escape opening (16) upwards along the direction of the sliding rod (21) under the action of centrifugal force and impacts the bridge side (11.1) of the cable bridge (11).
3. The impact testing system of claim 2, wherein: a torsion spring (30) is sleeved on the track deviation shaft (18), one end of the torsion spring (30) is fixedly connected with the bearing seat (29), and the other end of the torsion spring is fixedly connected with the spring connecting disc (28); the torsion spring (30) forms a clockwise torsion force on the spring connecting disc (28).
4. The impact testing system of claim 3, wherein: the arc-shaped trigger block (17) is attached to the right side of the right semicircular arc rail (1.2), an inner arc surface (17.1) of a block body of the arc-shaped trigger block (17) is in sliding fit with an outer arc surface of the right semicircular arc rail (1.2), and the right semicircular arc rail (1.2) cannot rotate clockwise along the track deviation shaft (18) under the limiting of the arc-shaped trigger block (17); the arc-shaped trigger block (17) can move along the axis direction of the circular ring rolling track (1) to be separated from the outer arc surface of the right semi-circular arc track (1.2);
one end of the square shaft (37) far away from the output shaft (38) is coaxially and fixedly connected with an external thread screw rod (24), a screw rod nut (25) is connected onto the external thread screw rod (24) in a transmission manner, and an internal thread (80) of the screw rod nut (25) is in threaded transmission fit with the external thread screw rod (24); one side of the screw nut (25) is fixedly connected with a guide hole seat (41), a guide hole b (41) with the axis parallel to the screw nut (25) is arranged on the guide hole seat (41), the floating platform further comprises a fixed guide rod (36) which penetrates through the guide hole b (41) in a sliding manner, and the fixed guide rod (36) is fixed on the floating platform (12) through a fixed support;
one side of the guide hole seat (41) is fixedly connected with the side part of the arc-shaped trigger block (17) through a synchronous bracket (70), so that the arc-shaped trigger block (17) and the screw nut (25) move synchronously.
5. The impact testing system of claim 4, wherein: a limiting roller (32) is arranged below the right semi-circular arc rail (1.2), and the limiting roller (32) is rotatably arranged on a lifting roller support (35) through a bearing; fixed mounting has riser (33) on floating platform (12), lift gyro wheel support (35) fixed mounting be in on lifter (34) of riser (33), be in the withdrawal state when lifter (34), and when gyro wheel escape opening (16) had formed, the lower part extrados of right side semicircle arc rail (1.2) with spacing gyro wheel (32) roll tangent.
6. The impact testing system of claim 5, wherein: one end of each sliding rod (21) far away from the first roller seat (20) is fixedly connected with an a limiting disc (43) with the diameter larger than the inner diameter of the a guide hole (50); when the collision impact roller (15) is tangent to the inner wall of the circular rolling track (1) in a rolling manner, a spacing plate (43) forms a space with the square shaft (37).
7. The impact testing system of claim 6, wherein: and a b limiting disc (44) is arranged at the tail end of the external thread screw rod (24).
8. The impact testing system of claim 7, wherein: the floating platform (12) is provided with two transverse guide rods penetrating through the channel (13) along the length direction of the cable bridge (11), and further comprises a transverse guide rod (800) coaxially movably penetrating through the guide rod penetrating through the channel (13), and two ends of the transverse guide rod (800) are fixedly connected with the beam support (6).
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