CN211696873U - Guide drop test system - Google Patents

Abstract

The utility model relates to a fall the experimental apparatus field, specifically disclose a direction drop test system, including falling the frame and setting up two hydraulic buffer in falling the frame below, two hydraulic buffer and falling all are provided with the direction rope between the frame, still include the direction steelframe, the both ends of direction steelframe are established respectively on the direction rope of difference, make direction steelframe along direction rope up-and-down motion, fall and be provided with hoisting device on the frame, hoisting device's output is connected with release, release is connected with the direction steelframe once, the bottom of direction steelframe is provided with secondary release, and the below of direction steelframe just is located and is provided with between the hydraulic buffer and falls the target. The utility model has the advantages that realized that the test product falls the accurate loading of gesture in the drop test, solved the relatively poor problem of target gesture precision is bumped to the test product in the high drop test of tradition.

Description

Guide drop test system

Technical Field

The utility model relates to a drop test device field, especially a direction drop test system.

Background

The product safety drop test is a safety examination test which is carried out for simulating the product to be subjected to falling, impact and other accidents in the processes of hoisting, transporting and using, and during the drop test, the product is required to drop at the corners, edges and surfaces under different postures according to the simulated accident scene, so that the product drop posture is required to be strictly controlled when the product is subjected to safety examination. The traditional drop test method only adjusts the initial posture to meet the test requirement when the product is installed, and does not control the posture of the product in the drop process. When the product falls at a higher height, the wind resistance is asymmetric in the falling process due to the asymmetry of the product structure, so that the falling attitude of the tested product is changed, and the final target collision attitude of the product cannot meet the test requirement. At present, most of drop test methods adopted at home and abroad adopt an uncontrolled free fall drop test method, test loading equipment adopts a one-time release mode, for example, German Federal materials and test research institutes, China radiation protection research institute, China weapon group 051 base and the like all adopt the uncontrolled free fall mode, and the posture of a product cannot be controlled after the product is released, so that the method can meet the test loading requirement for low-height (less than or equal to 9 m) drop, but has larger target collision posture error for the higher-height (more than 9 m) drop test, and the deviation of product examination is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a direction drop test system, ensure the change volume of experiment product at the in-process gesture of whereabouts at the within range that allows through the mode that adopts twice release.

The purpose of the utility model is realized through the following technical scheme: the utility model provides a direction drop test system, includes the frame and sets up two hydraulic buffer that fall the frame below, two hydraulic buffer with fall and all be provided with the direction rope between the frame, still include the direction steelframe, the both ends of direction steelframe are established respectively on the direction rope of difference, make the direction steelframe along the direction rope up-and-down motion, fall and be provided with hoisting device on the frame, hoisting device's output is connected with release, release and direction steelframe are connected once, the bottom of direction steelframe is provided with secondary release, and the below of direction steelframe just is located and is provided with between the hydraulic buffer and falls the target.

Specifically, hydraulic buffer include the mounting base, the top of mounting base is provided with the pneumatic cylinder, the pneumatic cylinder endotheca is equipped with a piston section of thick bamboo, be provided with the off-load awl along the axle center axial in the pneumatic cylinder, be provided with the support in the pneumatic cylinder, the middle part of support is provided with the orifice, the orifice cover is established on the off-load awl, the bottom and the support of a piston section of thick bamboo are connected.

Specifically, the top of off-load awl be provided with the supporting seat, be provided with the boss on the supporting seat, the array is provided with the overflow hole on the supporting seat, the cover is equipped with reset spring on the boss, the top of piston cylinder be provided with the closing cap, the bottom of closing cap is provided with the cylinder platform, reset spring's a pot head is established on the cylinder platform.

Specifically, the top of closing cap is provided with the sacrificial body, the bottom of mounting base is provided with first direction rope spliced pole, all be provided with the centre bore on mounting base, off-load awl, supporting seat, closing cap and the sacrificial body, the one end and the direction rope spliced pole of direction rope are connected, and the other end passes mounting base, pneumatic cylinder, off-load awl, supporting seat and the closing cap in proper order and is connected with falling the frame after the centre bore that sets up.

Specifically, the upper end of the piston cylinder is circumferentially provided with a plurality of spray holes in an array mode, and the bottom of the hydraulic cylinder is provided with a valve communicated with the inside of the hydraulic cylinder.

Specifically, the frame that falls on be provided with overspeed device tensioner, overspeed device tensioner includes second direction rope spliced pole, the one end and the second direction rope spliced pole of direction rope are connected, the one end of second direction rope spliced pole is provided with the external screw thread, still including setting up the tensioning support on falling the frame, be provided with the through-hole on the tensioning support, second direction rope spliced pole is established screwed one end and is passed through-hole and threaded connection nut.

Specifically, the lower extreme of piston cylinder is provided with two at least spacing bosss of annular, is provided with the annular seal groove on the spacing boss of annular, be provided with the sealing rubber ring in the annular seal groove and realize the sealed of piston cylinder and pneumatic cylinder, the top of pneumatic cylinder is provided with spacing lid and is used for restricting the removal extreme position of piston cylinder.

Specifically, the upper portion and the lower part at direction steelframe both ends all are provided with the uide bushing, the uide bushing cover is established on the direction rope, the uide bushing passes through the bolt fastening on the direction steelframe.

Specifically, the bottom of direction steelframe and the below that is located there is secondary release are provided with and end the pendulum device, end the pendulum device including fixing the mounting panel on the direction steelframe, be provided with the regulation screw hole on the mounting panel, regulation screw hole threaded connection has adjusting screw, threaded connection has adjusting nut to lock on the adjusting screw. .

The utility model has the advantages of it is following:

1. the utility model adopts the mode that the primary release device is combined with the secondary release device to respectively release the guide steel frame and the test product, after the primary release device separates the guide steel frame from the primary release device, the guide steel frame and the test product fall freely together, in the process, the swing stopping device is arranged, so that the test product can be ensured to always keep the initial posture in the process of falling together of the guide steel frame, and the secondary release device separates the guide steel frame from the test product after the guide steel frame and the test product fall together for a certain time, at the moment, only the test product falls freely and loses the control of the swing stopping device, the time of the process of the test product falling freely is very short, therefore, the posture variation is very small, the experimental requirement is met, and the effect of accurately controlling the posture variation of the test product in the experiment with the height of more than 9m is achieved.

2. The hydraulic buffer device adopted by the utility model adopts a gradually-changed throttling structure, the appearance of the unloading cone adopts a parabolic curved surface structure, so that the area of the throttling hole is changed from large to small according to a certain rule, and when the hydraulic buffer device starts to impact, the buffering speed is higher, and the area of the throttling hole is matched with the larger area; at the end of the damping, the speed is lower, matching a smaller orifice area, so that the amount of variation in damping force and damping speed remains substantially constant. The flow rate through the orifice is determined by the mass and velocity of the impinging moving body, and most of the impinging energy becomes heat as the liquid flows through the orifice, warming the damping medium water and then dissipating it into the air.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the hydraulic buffer device of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

fig. 4 is a schematic structural view of the tensioning device of the present invention;

FIG. 5 is a schematic structural view of the swing stop device of the present invention;

FIG. 6 is a schematic diagram of a conventional gap throttling principle;

FIG. 7 is a schematic view of a conventional orifice throttling principle;

FIG. 8 is a speed and acceleration curve of a conventional throttling buffer device during buffering;

fig. 9 is a damping force-displacement curve of the hydraulic damping device of the present invention when a 45m drop occurs;

in the figure: 1-a falling frame, 2-a lifting device, 3-a tensioning device, 4-a primary release device, 5-a guide steel frame, 6-a secondary release device, 7-a test product, 8-a guide rope, 9-a hydraulic buffer device, 10-a falling target, 11-a swing stopper, 12-a sacrificial body, 13-a spray hole, 14-a piston cylinder, 15-a hydraulic cylinder, 16-a support, 17-an unloading cone, 18-a mounting base, 19-a first guide rope connecting column, 20-a valve, 21-a reset spring, 22-a sealing cover, 23-a guide sleeve, 24-an annular limiting boss, 25-a supporting seat, 26-an overflow hole, 27-a throttle hole, 28-a limiting cover and 29-a second guide rope connecting column, 30-tensioning bracket, 31-mounting plate, 32-adjusting nut and 33-adjusting screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.

As shown in fig. 1 to 9, a guiding drop test system comprises a drop frame 1 and two hydraulic buffer devices 9 arranged below the drop frame 1, a guide rope 8 is arranged between the two hydraulic buffer devices 9 and the falling frame 1, and the falling frame also comprises a guide steel frame 5, two ends of the guide steel frame 5 are respectively sleeved on different guide ropes 8, so that the guide steel frame 5 moves up and down along the two guide ropes 8, the falling frame 1 is provided with a lifting device 2, the output end of the lifting device 2 is connected with a primary release device 4, the primary release device 4 is connected with a guide steel frame 5, a secondary release device 6 is arranged at the bottom of the guide steel frame 5, and a swing stopping device 11 is arranged at the bottom of the guide steel frame 5 and below the secondary release device 6, and a falling target 10 is arranged below the guide steel frame 5 and between the hydraulic buffer devices 9. In the prior art, the drop test device is mostly used for tests with the height less than nine meters, such as drop tests of various electronic products, the experimental height of the device can not exceed five meters, the time of the process from releasing to target hitting is short due to the low experimental height when the device is used for the drop experiment, the posture of the product meets the target hitting error of the experiment in the free drop process, so that the attitude of the product does not need to be strictly controlled, but when the experimental height exceeds nine meters, when the product falls freely, the height is too high, the falling time is increased, and the wind resistance is asymmetric in the falling process due to the asymmetry of the product in the falling process, so that the falling attitude of the tested product is changed, and the final target-hitting attitude of the product cannot meet the test requirement, therefore, the posture of the product needs to be controlled in a falling experiment with the experiment height higher than nine meters; according to the scheme of the embodiment, the experimental product 7 is fixed on the secondary release device 6 through the flexible rope to ensure that the lifting point passes through the vertical line of the mass center of the product, the secondary release device 7 is fixed at the lower end of the guide steel frame 5, the guide steel frame 5 is connected with the lifting device 2 through the primary release device 4, the lifting device 2 can adopt a winch, the primary release device 4 is connected through a rope, the lifting device 2 lifts the guide steel frame 5 and the experimental product 7 to the height of the experiment together, when the laboratory starts, the primary release device 4 works to disconnect the guide steel frame 5 from the lifting device 2, after the guide steel frame 5 is disconnected, the guide steel frame 5 and the experimental product 7 fall down together under the action of gravity, in the falling process, because the swing stopping device 11 is arranged on the guide steel frame 5, the experimental product can keep the posture unchanged in the process, when the guide steel frame 5 and the experimental product 7 fall down, in order to ensure that the posture of the guide steel frame 5 cannot be changed, the scheme of guiding by the guide ropes 8 is adopted, two guide ropes 8 are arranged on the falling frame 1, two ends of the guide steel frame 5 are sleeved on the guide ropes 8, the guide ropes 8 are tightly stretched between the hydraulic buffer device 9 and the falling frame 1, so that the guide steel frame 5 can fall along the guide ropes 8 when falling freely, the falling posture of the guide steel frame is not changed, after the guide steel frame 5 and the experimental product 7 fall together for a period of time, the distance between the experimental product 7 and the falling target 10 is reduced, but when the guide steel frame 5 is not contacted with the hydraulic buffer device 9, the secondary release device 7 works to separate the experimental product 7 from the guide steel frame 5, after separation, the experimental product 7 and the guide steel frame 5 continue to fall freely at the initial speed when being separated until the final target of the experimental product 7 is collided, and in the process, the guide steel frame 5 can be contacted with the hydraulic buffer device 9 after continuing to fall for, under the buffer action of the hydraulic buffer device 9, the guide steel frame 5 is finally stopped on the hydraulic buffer device 9, the purpose of this is to ensure the integrity of the guide steel frame 5 for reuse, after the secondary release device 6 releases the experimental product 7, because the height when releasing is below nine meters, at this time, the experimental product 7 only falls freely, and the falling speed is fast, after the experimental product is separated from the anti-swing device 11, the falling time is short, the posture change is small, the precision requirement is satisfied, the problem that the precision of the target-hitting posture of the experimental product in the traditional height falling test is poor is solved well through the above scheme, it needs to be explained that the primary release device 4 adopts the mode of the electric permanent magnet mechanism in the above scheme, the sucker is arranged on the guide steel frame 5, the primary release device 4 and the guide steel frame 5 are connected into a whole through the mode of magnetic absorption, magnetic force disappears, can break off release 4 and direction steelframe 5, and the wire rope's that the hoist engine is last one end is provided with the couple, and release 4 fixes on the couple once, and the hoist engine just can promote release 4 and promote direction steelframe 5 like this, and secondary release 6 adopts explosion bolt or hydraulic drive mechanism for the input of experimental product, and release 4 and secondary release 6 are all prior art, are often used for in the drop experiment.

As shown in fig. 2 and 3, the hydraulic buffer device 9 includes a mounting base 18, a hydraulic cylinder 15 is disposed on the top of the mounting base 18, a piston cylinder 14 is sleeved in the hydraulic cylinder 15, an unloading cone 17 is disposed in the hydraulic cylinder 15 along the axial direction of the axis, a support 16 is disposed in the hydraulic cylinder 15, a throttle hole 27 is disposed in the middle of the support 16, the throttle hole 27 is sleeved on the unloading cone 17, and the bottom of the piston cylinder 14 is connected with the support 16, the experimental system of this embodiment is used for a drop experiment with a height of more than nine meters, when the guide steel frame 5 drops from a height of about 20 meters to a height contacting with the hydraulic buffer device 9, the speed is fast, the weight is large, a mechanism with a strong buffer capacity is needed to achieve the buffer effect, the hydraulic buffer mode is preferably adopted for buffering, and a buffer medium is filled in the hydraulic cylinder 15 before the experiment, the bottom of the unloading cone 17 is fixed at the bottom of the hydraulic cylinder 15, the unloading cone 17 adopts a parabolic curved surface structure, the diameter of the upper end of the unloading cone 17 is smaller than that of the lower end of the unloading cone, the side wall of the support 16 is tightly contacted with the inner side wall of the hydraulic cylinder 15, the upper end of the unloading cone 17 penetrates through a throttling hole 27 formed in the middle of the support 16, when the guide steel frame 5 presses the piston cylinder 14 downwards, the piston cylinder 14 transmits force to the support 16 so as to press the support 16 downwards, when the support 16 presses downwards, because a gap for overflowing a buffer medium exists between the throttling hole 27 and the unloading cone 17, the buffer medium can be extruded into the piston cylinder 14 through the throttling hole 27 when the support 16 presses downwards, so as to achieve the purpose of buffering, the piston cylinder 14 and the guide steel frame 5 continuously fall under the action of the hydraulic buffer device 9 until the speed is reduced to zero, because the unloading cone 17 of the, it is gradual change throttle formula buffer structure, its advantage is approximately unchangeable at the pressure p of whole buffer cavity in buffer process for piston cylinder 14 and direction steelframe 5 are similar to even deceleration motion in buffer process's motion, and its change in speed and energy consumption are more even, have reduced the mutual impact between the two, make buffer process steady, have avoided the acceleration sudden change that traditional buffer exists at buffering starting point and terminal point, lead to the pneumatic cylinder structural damage, because the utility model discloses a gradual change throttle formula buffer, its theory of operation is along with the change of stroke, makes the area of orifice 27 change according to certain law by big to little: when the impact starts, the buffer speed is higher and is matched with the area of the larger throttle hole 27; when the buffering is finished, the speed is lower, the area of the small throttling hole 27 is matched, so that the buffering force and the variation of the buffering speed are kept approximately unchanged, the flow rate flowing through the throttling hole 27 is determined by the mass and the speed of the impact moving body, most of impact energy is changed into heat when liquid flows through the throttling hole 27, the buffering medium water is heated and then is dissipated into air, the buffering force changes along with displacement in the buffering process, as shown in figure 9, and the experimental condition that the effective falling height of the guide steel frame is 45m is shown in figure 9 in 2.1 t; the traditional variable-throttling hydraulic buffer device is mainly used for buffering a moving piston in a hydraulic cylinder, the structure principle is shown in figures 6 and 7, the buffer device is installed at the bottom of the hydraulic cylinder, the buffer stroke is short, the buffer energy is small, and the buffer device is not suitable for buffering objects with long stroke and large impulse in a drop test, meanwhile, the traditional variable-throttling buffer device is used for buffering at equal speed reduction without speed sudden change, namely, hard impulse does not exist, but acceleration sudden change exists at the buffer starting point and the buffer finishing point, as shown in figure 8, the problem of soft impulse exists, and the structure of the hydraulic cylinder is easily damaged.

As shown in fig. 3, a supporting seat 25 is provided at the top of the unloading cone 17, a boss is provided on the supporting seat 25, overflow holes 26 are provided in an array on the supporting seat 25, a return spring 21 is sleeved on the boss, a sealing cover 22 is provided at the top of the piston cylinder 14, the sealing cover 22 is fixed on the piston cylinder 14 by bolts, a cylindrical table is provided at the bottom of the sealing cover 22, one end of the return spring 21 is sleeved on the cylindrical table, the return spring 21 is arranged in the piston cylinder 14, the supporting seat 25 is provided at the top of the unloading cone 17, the unloading cone 17 is kept in a static state during the process of pressing down the piston cylinder 14, so the supporting seat 25 is also a static maintaining device, and the return spring 21 is provided between the sealing cover 22 and the supporting seat 25, the return spring 21 is compressed during the process of pressing down the piston cylinder 14, a certain buffering effect is achieved, and it is mainly used for resetting the piston cylinder 14, when the guide steel frame 5 is separated from the hydraulic buffer device 9 after the test is finished, the piston cylinder 14 can automatically reset under the action of the reset spring 21, so that preparation is made for the next test.

Furthermore, the top of the sealing cover 22 is provided with a sacrificial body 12, the sacrificial body 12 is of a rubber block or foamed aluminum structure, and is used for reducing instant impact at the moment when the guide steel frame 5 and the hydraulic buffer device 9 are contacted during a test, reducing mutual impact between the guide steel frame 5 and the hydraulic buffer device 9, prolonging the service life of the guide steel frame 5 and the hydraulic buffer device 9, the bottom of the mounting base 18 is provided with a first guide rope connecting post 19, the mounting base 18, the bottom of the hydraulic cylinder 15, the unloading cone 17, the supporting seat 25, the sealing cover 22 and the sacrificial body 12 are all provided with a central hole, one end of the guide rope 8 is connected with the first guide rope connecting post 19, the other end of the guide rope 8 sequentially passes through the central holes arranged on the mounting base 18, the hydraulic cylinder 15, the unloading cone 17, the supporting seat 25 and the sealing cover 22 and then is connected with the falling frame 1, and the guide rope, the work of the hydraulic buffer device is not influenced by the contact buffer between the guide steel frame 5 and the hydraulic buffer device 9.

Furthermore, a plurality of spray holes 13 are circumferentially arranged at the upper end of the piston cylinder 14 in an array manner, a valve 20 communicated with the interior of the hydraulic cylinder 15 is arranged at the bottom of the hydraulic cylinder 15, and in the process of pressing down the piston cylinder 14, a buffer medium in the cylinder body of the hydraulic cylinder 15 is squeezed into the piston cylinder 14 through a throttle hole 27 and then is sprayed out from a large number of spray holes 13 on the wall of the piston cylinder 14, so that impact kinetic energy is taken away, the impact of the buffer medium on the inner wall of the piston cylinder 14 is reduced, and meanwhile, the buffer efficiency is improved; the valve 20 comprises a water inlet valve and a water outlet valve, before the test, the water outlet valve is closed firstly, then the buffer medium is injected into the hydraulic cylinder 15 through the water inlet valve, the buffer medium can be water until the water overflows from the upper part of the hydraulic cylinder 15, the water inlet valve is closed, the piston cylinder 14 moves upwards to the top under the action of the water in the water injection process, at the moment, the hydraulic buffer device 9 is in a working state, the buffer medium is tap water, the requirement on the sealing performance of the moving part of the device is lowered, the sealing structure is simplified, the development and use cost is saved, and meanwhile, the pollution to the environment is reduced.

Further, the falling frame 1 is provided with the tensioning device 3, the tensioning device 3 comprises a second guide rope connection post 29, one end of the guide rope 8 is connected with the second guide rope connection post 29, one end of the second guide rope connection post 29 is provided with an external thread, the tensioning device further comprises a tensioning support 30 arranged on the falling frame 1, a threaded hole is formed in the tensioning support 30, one end of the second guide rope connection post 29 provided with the threaded hole is connected with the threaded hole and is in threaded connection with a nut for locking, the guide steel frame 5 can be ensured to stably and freely fall downwards along the guide rope 8 only when the guide rope 8 is kept in a tightened state in the experiment process, 300Kg of force is preferably applied to the guide rope 8 in the scheme, the second guide rope connection post 29 rotates to enable the second guide rope connection post 29 to generate threaded transmission with the tensioning support 30, and the purpose of adjusting the tensioning force is achieved, and after the tension force meets the requirement, the nut is used for locking.

Further, the lower extreme of piston cylinder 14 is provided with two at least annular spacing bosss 24, is provided with annular seal groove on the annular spacing boss 24, be provided with the sealed rubber ring in the annular seal groove and realize piston cylinder 14 and pneumatic cylinder 15's sealed, the top of pneumatic cylinder 15 is provided with spacing lid 28 and is used for restricting the removal extreme position of piston cylinder 14.

As shown in fig. 2, the guide sleeves 23 are respectively disposed at the upper and lower portions of the two ends of the guide steel frame 5, the guide sleeves 23 are respectively sleeved on the guide ropes 8, the guide sleeves 23 are fixed on the guide steel frame 5 by bolts, the guide sleeves 23 are composed of two bilaterally symmetrical components, a hole is disposed in the middle of each guide sleeve, the guide ropes 8 can be covered by the two bilaterally symmetrical components after being connected by bolts, and a cableway is formed, in the above scheme, two guide sleeves 23 are disposed at each side of the two sides of the guide steel frame 5, and the two guide sleeves 23 are distributed at the upper and lower ends of the guide steel frame 5, if only one guide sleeve 23 is disposed at each side, a posture change or an overturning may occur during the falling of the guide steel frame 5, because there is only one constraint at each side of the guide steel frame 5, such a structure is not stable enough, and after the two guide sleeves 23 are disposed, it sets up two restraints on a direction rope 8, and the distance of two uide bushings 23 is enough long, and just such structure is enough stable.

As shown in fig. 5, the bottom of direction steelframe 5 and the below that is located secondary release 6 are provided with pendulum stopping device 11, pendulum stopping device 11 include mounting panel 31, be provided with the regulation screw hole on the mounting panel 31, regulation screw hole threaded connection has adjusting screw 33, and regulation screw hole and adjusting screw 33 all are provided with a plurality ofly, adjusting screw 33's the other end and direction steelframe 5 threaded connection, threaded connection has adjusting nut 32 on adjusting screw 33, and mounting panel 31 fixes at the top of direction steelframe 5 when using, makes it reciprocate through rotatory adjusting screw 33, supports its adjusting screw 33 on the surface at experimental product 7, supports jointly through a plurality of adjusting screw 33 and can make its gesture fixed on experimental product 7's the surface, reaches the effect that prevents experimental product 7 wobbling.

A method of conducting a test using a guided drop test system, comprising the steps of:

s1, test preparation: 300Kg of pretightening force is applied to the two guide ropes 8 through the tensioning device 3, so that the guide ropes 8 are in a tensioning state; meanwhile, water is injected into the hydraulic cylinder 15 through the valve 20;

s2, installing a test product: the guide steel frame 5 is put down through the lifting device 2, the test product 7 is connected with the secondary release device 6 through the flexible rope, and the adjusting screw 33 on the swing stopping device 11 is adjusted to be abutted against the surface of the test product 7; in the scheme, four adjusting screws 33 are preferably arranged, and the four adjusting screws 33 abut against the test product 7 to limit the degree of freedom of the test product 7 and prevent the test product 7 from swinging; then, the guide steel frame 5 and the test product 7 are lifted to the bottom surface of the test product 7 by the lifting device 2, wherein the distance from the bottom surface of the test product 7 to the falling target 10 is 20m, and the height of 20m is taken as an example in the scheme; the height of the hydraulic buffer device 9 is 5 m;

s3, releasing the guide steel frame: the primary release device 4 works, the guide steel frame 5 is disconnected from the primary release device 4, and the guide steel frame 5 and the test product 7 freely fall along the guide rope 8;

s4, release test product: the 1.3S secondary release device 6 works after the primary release device 4 releases the guide steel frame 5 and the test product 7, after the test product 7 falls for 1.3S, the test product 7 falls for 13m at the moment, the distance from the upper surface of the falling target 10 is 7m, the test product 7 is separated from the secondary release device 6, the test product 7 is separated from the guide steel frame 5 and then continuously and freely falls at the separation speed until the test product 7 collides with the target, the guide steel frame 5 falls for a period of time after separation, the speed is stably reduced until the speed is zero under the action of the hydraulic buffer device 9 and stops at the top of the hydraulic buffer device 9, the guide falling test is finished, wherein the uncontrolled falling time is about 0.7S and the posture change of the test product 7 is very small.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any way. The technical solutions of the present invention can be used by anyone skilled in the art to make many possible variations and modifications to the technical solution of the present invention, or to modify equivalent embodiments with equivalent variations, without departing from the scope of the technical solution of the present invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the present invention are all within the protection scope of the present invention.

Claims (9)

1. A directional drop test system is characterized in that: the device comprises a falling frame (1) and two hydraulic buffering devices (9) arranged below the falling frame (1), wherein guide ropes (8) are arranged between the two hydraulic buffering devices (9) and the falling frame (1), the device further comprises a guide steel frame (5), two ends of the guide steel frame (5) are respectively sleeved on the different guide ropes (8), so that the guide steel frame (5) moves up and down along the two guide ropes (8), a lifting device (2) is arranged on the falling frame (1), the output end of the lifting device (2) is connected with a primary release device (4), the primary release device (4) is connected with the guide steel frame (5), a secondary release device (6) is arranged at the bottom of the guide steel frame (5), a swing stopping device (11) is arranged at the bottom of the guide steel frame (5) and below the secondary release device (6), a falling target (10) is arranged below the guide steel frame (5) and between the hydraulic buffer devices (9).

2. A guided drop test system according to claim 1, wherein: hydraulic buffer (9) including mounting base (18), the top of mounting base (18) is provided with pneumatic cylinder (15), piston cylinder (14) are equipped with to the cover in pneumatic cylinder (15), be provided with off-load awl (17) along the axle center axial in pneumatic cylinder (15), be provided with in pneumatic cylinder (15) and support (16), the middle part of supporting (16) is provided with orifice (27), orifice (27) cover is established on off-load awl (17), the bottom and the support (16) of piston cylinder (14) are connected.

3. A guided drop test system according to claim 2, wherein: the top of off-load awl (17) is provided with supporting seat (25), be provided with the boss on supporting seat (25), the array is provided with overflow hole (26) on supporting seat (25), the cover is equipped with reset spring (21) on the boss, the top of piston cylinder (14) be provided with closing cap (22), the bottom of closing cap (22) is provided with the cylinder platform, a pot head of reset spring (21) is established on the cylinder platform.

4. A guided drop test system according to claim 3, wherein: the top of closing cap (22) is provided with sacrificial body (12), the bottom of mounting base (18) is provided with first direction rope spliced pole (19), all be provided with the centre bore on mounting base (18), pneumatic cylinder (15) bottom, off-load awl (17), supporting seat (25), closing cap (22) and the sacrificial body (12), the one end and the first direction rope spliced pole (19) of direction rope (8) are connected, and the other end of direction rope (8) is passed mounting base (18), pneumatic cylinder (15), off-load awl (17), supporting seat (25) and closing cap (22) in proper order and is connected with falling frame (1) after the centre bore that sets up.

5. A guided drop test system according to claim 2, wherein: the upper end of the piston cylinder (14) is circumferentially provided with a plurality of spray holes (13) in an array mode, and the bottom of the hydraulic cylinder (15) is provided with a valve (20) communicated with the interior of the hydraulic cylinder (15).

6. A guided drop test system according to claim 1, wherein: fall frame (1) on be provided with overspeed device tensioner (3), overspeed device tensioner (3) include second direction rope spliced pole (29), the one end and the second direction rope spliced pole (29) of direction rope (8) are connected, the one end of second direction rope spliced pole (29) is provided with the external screw thread, still including setting up tensioning support (30) on falling frame (1), be provided with the screw hole on tensioning support (30), second direction rope spliced pole (29) establish the screwed one end with threaded hole connection and threaded connection have the nut to lock.

7. A guided drop test system according to claim 2, wherein: the lower extreme of piston cylinder (14) is provided with two at least annular spacing bosss (24), is provided with annular seal groove on the spacing boss of annular (24), be provided with the sealed rubber ring in the annular seal groove and realize the sealed of piston cylinder (14) and pneumatic cylinder (15), the top of pneumatic cylinder (15) is provided with the removal extreme position that spacing lid (28) are used for restricting piston cylinder (14).

8. A guided drop test system according to claim 1, wherein: the upper portion and the lower part at guide steel frame (5) both ends all are provided with uide bushing (23), uide bushing (23) cover is established on direction rope (8), uide bushing (23) pass through the bolt fastening on guide steel frame (5).

9. A guided drop test system according to claim 1, wherein: stop pendulum device (11) including fixing mounting panel (31) on direction steelframe (5), be provided with the regulation screw hole on mounting panel (31), regulation screw hole threaded connection has adjusting screw (33), threaded connection has adjusting nut (32) to lock on adjusting screw (33).

Images