Multifunctional dynamic load impact test platform based on spring energy storage and drop hammer energy supply

Abstract

A multifunctional dynamic load impact test platform based on spring energy storage and drop hammer energy supply relates to the technical field of impact performance detection equipment and comprises a double-drop-hammer high-energy impact mechanism, an external support protection frame and a mobile assembly mechanism. The double-drop-hammer high-energy impact mechanism comprises a guide supporting polished rod, a high-strength spring energy storage mechanism, a double-drop-hammer impact mechanism and a sample fixing mechanism, the movable assembly mechanism is installed behind the external supporting protection frame, the bridge type supporting frame is a parallel bridge type platform formed by assembling square stand columns and cross beams, and bottom base plates are laid at the bottoms of the stand columns and fixed to the ground; a symmetrical structure formed by the double drop hammers can realize a shear impact simulation test; the supporting and protecting frame is erected outside the double-drop-hammer high-energy impact mechanism; the movable assembling mechanism is used for assembling test mechanism components before the impact test is completed, and the test platform can flexibly adapt to the impact performance test from small test pieces to large-size components, covers samples of different shapes and materials, and simulates impact responses under various complex working conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of impact performance detection equipment, and provides a multifunctional dynamic load impact test platform based on spring energy storage and drop hammer energy supply. BACKGROUND

[0002] In the fields of mine exploitation, aerospace, ship engineering and automobile manufacturing, the ability of various structures and components to resist impact load is one of the important indicators of product performance. Impact test is mainly applied to test the impact resistance of metals, composite materials, concrete and structural components under high-speed collision impact load, so as to detect the physical and mechanical properties and related performance parameters of materials and structural components under dynamic load, and guide the research and development of materials and structural design work.

[0003] In the prior art, the commonly used impact test system includes a split Hopkinson pressure bar (SHPB) test system and a drop hammer impact test system. The SHPB system is based on one-dimensional stress wave theory and derives the stress-strain relationship of the sample material by measuring the strain on the pressure bar. Although the SHPB system impact test system can study the dynamic performance of materials at high strain rate, the total impact energy is low in simulating the dynamic response of actual underground engineering, and there are obvious deficiencies in impact loading of large-size structure test. The drop hammer impact test system usually uses a heavy hammer or a pendulum hammer falling freely to simulate impact load, and observes the stress and deformation of the sample during impact. However, the existing drop hammer impact test system has a single energy supply mode, and the impact energy supply size depends on the mass of the drop hammer and the height of the testing machine. Within a certain height range, the impact energy and speed are relatively limited, and cannot meet the high-energy impact test requirements. At the same time, due to the inherent design of the drop hammer assembly and the reaction force structure, it is difficult to operate in terms of impact energy continuity and multiple reciprocating impact by lifting the drop hammer height and changing the drop hammer mass. In addition, in the underground engineering environment, the surrounding rock often has a complex structure due to crack cutting or layering. The anchor rod at the crack surface position not only bears tensile impact load, but also bears shear impact load. The existing impact test device cannot effectively realize the functional integration of crack rock anchor rod impact tensile and shear performance test, which further limits its application in complex engineering scene simulation. Therefore, in order to meet the impact test requirements of different materials and various working conditions, it is of great significance to develop a multifunctional dynamic load impact test platform that can accurately control energy, flexibly adjust impact energy and speed, meet the simulation requirements of various working conditions, and be suitable for different sizes of test pieces. SUMMARY

[0004] In order to realize axial impact loading on large size anchoring rock mass test piece, impact shear loading on anchoring double fissure rock mass through impact middle rock block, test shear impact mechanical properties of anchoring fissure rock mass, and impact performance test of materials under various complex working conditions, the application provides a multifunctional dynamic load impact test platform based on spring energy storage and drop hammer energy supply, and specific technical solutions are as follows.

[0005] A multifunctional dynamic load impact test platform based on spring energy storage and drop hammer energy supply, comprising a double-drop hammer high-energy impact mechanism, an external support protection frame and a mobile assembly mechanism, the double-drop hammer high-energy impact mechanism comprises twelve guide support light bars, a high-strength spring energy storage mechanism, a double-drop hammer impact mechanism and a sample fixing mechanism, the high-strength spring energy storage mechanism, the double-drop hammer impact mechanism and the sample fixing mechanism are arranged on the twelve guide support light bars; the external support protection frame comprises a layer of support protection frame and a two-layer bearing protection frame, and the two-layer bearing protection frame is arranged above the layer of support protection frame; the mobile assembly mechanism is installed behind the external support protection frame and is used for assembling test mechanism components before impact test.

[0006] Preferably, the twelve guide support light bars are dispersedly installed between the upper bearing plate and the lower bearing plate, the guide support light bars comprise positioning light bars, guide light bars and bearing light bars, and the four positioning light bars, the four guide light bars and the four bearing light bars are arranged at four diagonal positions of the upper bearing plate and the lower bearing plate respectively; the positioning light bars and the guide light bars are provided with cutting rings; two groups of fixed pulley blocks are arranged above the upper bearing plate, the impact plate guide rod, the spring damping pad, the nitrogen damping rod and the sample shear impact pad block are installed on the lower bearing plate; the impact plate guide rod is used for positioning and installing the sample; the spring damping pad and the nitrogen damping rod are used for damping the test platform; and the sample shear impact pad block is used for placing the shear sample when the shear impact test is realized.

[0007] Preferably, the mobile assembly mechanism comprises a bridge support frame, a translation mechanism and a rotation mechanism, the bridge support frame is formed into a parallel bridge type platform by assembling and matching a square column and a crossbeam, and the square column is laid with a bottom pad plate at the bottom and is fixed to the ground by screws.

[0008] Preferably, the translation mechanism comprises a motion track, a fixed bearing frame and a transmission mechanism, the motion track is fixed above the support platform crossbeam, and the motion track comprises a guide rail positioning strip, a channel-shaped guide rail and a gear meshing guide rail; the fixed bearing frame comprises a bearing frame and a transmission mechanism fixed frame, a slide block set is arranged below the bearing frame, and the bearing frame translates along the motion track; the transmission mechanism comprises a transmission mechanism and a transmission mechanism fixed seat, the transmission mechanism is installed on the transmission mechanism fixed frame, a transmission gear is installed below the transmission mechanism fixed frame, the transmission mechanism meshes with the driving gear to drive the translation mechanism to translate along the motion track.

[0009] Preferably, the rotating mechanism comprises a rotating support, a vertical rod, a telescopic cantilever beam, and a steel wire rope electric hoist, the rotating support is fixed on the transmission motor fixing frame of the translation mechanism, the vertical rod rotates horizontally around the rotating support; the telescopic cantilever beam is connected with the top end of the vertical rod through a rotating string pin, the telescopic cantilever beam is also connected with a secondary hydraulic cylinder, the secondary hydraulic cylinder controls the telescopic cantilever beam to rotate up and down around the rotating string pin through telescopic control, the tail end of the telescopic cantilever beam is provided with a fixed pulley; the electric motor of the steel wire rope electric hoist is fixed above the rotating cantilever beam, the steel wire passes through the fixed pulley at the tail end of the telescopic cantilever beam, and the lower end of the steel wire is connected with a hook, and the movable magnetic attraction button switch is adsorbed on the side surface of the vertical rod.

[0010] Preferably, the high-strength spring energy storage mechanism is installed on the positioning light pole, and the high-strength spring energy storage mechanism comprises a spring retaining ring, a high-strength spring and a spring protection sleeve, the inner diameter of the spring retaining ring is the same as the inner diameter of the cutting ring of the positioning light pole, and the impact energy is adjusted by adjusting the compression amount of the high-strength spring.

[0011] Preferably, the double-hammer impact mechanism comprises two groups of symmetrically connected hammer body mechanisms and hammer body lifting mechanisms, the hammer body mechanism comprises an upper pressure bearing plate, a lower pressure bearing plate and a side retaining plate, the upper pressure bearing plate, the lower pressure bearing plate and the side retaining plate are connected into a box structure, weights are placed in the box to change the weight, and the side retaining plate is fixed outside the upper and lower pressure bearing plates through screws; the lower pressure bearing plate of the hammer body mechanism is connected with two spring compression plates at both ends, the spring compression plates are provided with through holes matched with the guide support light pole, and the through holes pass through the positioning light pole and the guide light pole respectively; the spring compression plates at symmetric positions below the two groups of hammer body mechanisms are fixedly connected through a rigid connecting plate; the upper pressure bearing plate of the hammer body mechanism is provided with a semicylindrical hammer body guide seat at both ends and in contact with the guide light pole, and the hammer body guide seat plays a guiding role when the hammer body moves up and down, a hammer body hanging shaft frame is fixed above the upper pressure bearing plate and used for connecting the hammer body lifting mechanism; three groups of symmetric through holes are arranged on a group of parallel stretching bosses on the hammer body hanging shaft frame, a fixed hanging pin is arranged in the middle group of through holes, and parallel double-shaft hanging seats are arranged in the two end groups of through holes, and the two groups of through holes form a two-stage connecting device of the hammer body mechanism and the hammer body lifting mechanism through the fixed hanging pin and the parallel double-shaft hanging seat; the parallel double-shaft hanging seat is composed of two parallel hanging shafts fixed on a retaining plate, and the parallel double-shaft hanging seat is moved out through a moving and falling oil cylinder between the retaining plate and the hammer body lifting mechanism.

[0012] It is also preferred that the hammer body lifting mechanism comprises an inner punched plate, an outer punched plate, a lifting device guide seat, a lifting hook, a hook shaft, a lifting drop cylinder and a lifting pulley block; the lifting device guide seat is fixed between the inner punched plate and the outer punched plate and plays a guiding role when the hammer body lifting mechanism moves up and down; the lifting hook is fixed between the inner punched plate and the outer punched plate through the hook shaft, the horizontal end of the lifting hook is connected with the lifting drop cylinder, the lower end of the lifting hook is connected with a fixed hook pin when the lifting hook falls, and the fixed hook pin connects the hammer body lifting mechanism and the hammer body mechanism; the lifting pulley block is fixedly installed between the inner punched plate and the outer punched plate and is used for lifting the double-drop hammer impact mechanism.

[0013] It is also preferred that the sample fixing mechanism comprises a fixed crossbeam and an impact plate, four through holes are arranged on the fixed crossbeam, the fixed crossbeam is installed on the bearing light pole, four locking piston groups are respectively installed on the front and back of the fixed crossbeam, respectively, and are used for locking the fixed crossbeam, the fixed crossbeam is connected with two tertiary hydraulic cylinders, the tertiary hydraulic cylinders are used for adjusting the height of the fixed crossbeam in an extending and retracting mode, the bottom end of the tertiary hydraulic cylinder is fixed on the lower pressure bearing plate, and the through hole in the center of the fixed crossbeam is used for fixing a sample; the impact plate has a multi-hole stretching structure, screw through holes are arranged on the impact platforms at the two ends of the impact plate, the impact platforms are connected with the lower pressure bearing plate of the drop hammer mechanism through screws, an impact pad plate is fixed on the impact platforms through screws, and the impact pad plate prevents the impact plate from being damaged when the drop hammer impacts; three through holes are arranged in the middle of the impact plate, and the through holes on the two sides are matched with impact plate guide rods.

[0014] It is also preferred that the one-layer support protection frame comprises a support steel frame and a glass protection frame, the support steel frame is welded by a plurality of hollow square steel pipes; the glass protection frame is installed in front of and on the two sides of the support steel frame, and a protection glass door is arranged in front of the glass protection frame; the two-layer bearing protection frame comprises a bearing plate and a protection fence, the bearing plate is laid above the one-layer support protection frame through connecting square tubes, two groups of support columns are symmetrically installed on the bearing plate, and the upper bearing plate of the double-drop hammer high-energy impact mechanism is connected; the protection fence is installed around the bearing plate; the test platform is provided with a movable protection staircase connecting the one-layer support protection frame and the two-layer bearing protection frame.

[0015] The multifunctional dynamic load impact test platform based on spring energy storage and drop hammer energy supply has the following advantages:

[0016] (1) The test platform innovatively combines spring energy storage and drop hammer energy supply, the high-strength spring energy storage mechanism can flexibly control energy output by adjusting the spring compression amount, the symmetrically connected double-drop hammer impact mechanism provides basic kinetic energy by means of free fall or momentum transmission, the two mechanisms work together, can realize low-energy high-precision impact, can also meet the extreme test demand of high-energy and high-speed, can provide greater impact energy at a smaller height, can guarantee the synchronization of double-drop hammer impact, and can greatly improve the energy adjustment range and output efficiency of the test platform.

[0017] (2) The external support protection frame of the test platform, and the spring damping pad and nitrogen damping rod device mounted on the inner lower bearing plate, can effectively ensure the safety of the impact test, and the movable assembly mechanism greatly improves the operability of the test. The impact test has the testing function of a general impact testing machine for small-size test pieces, and through reasonable design of the tensile and shear impact loading test system, the installation and impact performance test detection of large-size test pieces are facilitated.

[0018] (3) The test platform can test the impact mechanical properties of rod-shaped components of metal materials, non-metal materials and composite materials; at the same time, it can test the impact performance of anchor rod supporting components commonly used in underground engineering, test the impact mechanical properties of anchor rods in full-size anchoring rock mass, and additionally test the shear impact mechanical properties of anchor rods in anchoring double-fractured rock mass, with high integration of test functions. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of a multifunctional dynamic load impact test platform based on spring energy storage and drop hammer energy supply;

[0020] Figure 2 is a test system profile view;

[0021] Figure 3 is a schematic diagram of a double-drop hammer high-energy impact mechanism;

[0022] Figure 4 is a high-strength spring mechanism and drop hammer impact mechanism profile view;

[0023] Figure 5 is an isometric view of the drop hammer impact mechanism;

[0024] Figure 6 is a schematic diagram of a test sample fixing beam;

[0025] Figure 7 is a top view of an impact plate;

[0026] Figure 8 is a schematic diagram of a movable assembly mechanism;

[0027] Figure 9 is a movable assembly mechanism profile view;

[0028] Figure 10 is a schematic diagram of an anchor rod impact test sample assembly;

[0029] Figure 11 is a schematic diagram of a double-fractured rock mass anchor rod shear impact test sample assembly;

[0030] In the figure: 100 - double hammer impact mechanism; 200 - moving assembly mechanism; 100-1 high-strength spring energy storage mechanism; 100-2 double hammer impact mechanism; 1 - upper bearing plate; 2 - lower bearing plate; 3 - positioning light lever; 4 - guide light lever; 5 - bearing light lever; 6 - fixed pulley block; 7 - impact plate guide rod; 8 - spring damping pad; 9 - nitrogen damping rod; 10 - sample shear impact pad; 11 - spring retaining ring; 12 - high-strength spring; 13 - spring protection sleeve; 14 - upper pressure bearing plate; 15 - lower pressure bearing plate; 16 - connecting plate; 17 - side retaining plate; 18 - spring compression plate; 19 - hammer body guide seat; 20 - hammer body hanging shaft frame; 21 - fixed hanging pin; 22 - parallel double shaft hanging seat; 23 - moving falling oil cylinder; 24 - inner punched plate; 25 - outer punched plate; 26 - lifting device guide seat; 27 - lifting hook; 28 - hook shaft; 29 - lifting falling oil cylinder; 30 - lifting pulley block; 31 - fixed cross beam; 32 - impact plate; 33 - locking piston group; 34 - three-stage hydraulic cylinder; 35 - impact pad plate; 36 - support steel frame; 37 - glass protection frame; 38 - protection glass door; 39 - bearing plate; 40 - protection fence; 41 - support column; 42 - movable protection staircase; 43 - upright column; 44 - cross beam; 45 - bottom pad plate; 46 - guide rail positioning strip; 47 - I-shaped guide rail; 48 - gear meshing guide rail; 49 - bearing frame; 50 - transmission machine fixed frame; 51 - sliding block group; 52 - transmission machine; 53 - transmission machine fixed seat; 54 - transmission gear; 55 - rotating support; 56 - upright rod; 57 - telescopic cantilever beam; 58 - steel wire rope electric hoist; 59 - rotating string pin; 60 - two-stage hydraulic oil cylinder; 61 - fixed pulley; 62 - lifting hook; 63 - movable magnetic button switch; 64 - anchor rod; 65 - pressure sensor; 66 - sensor pad plate; 67 - suspender; 68 - tray; 69 - nut; 70 - double fissure anchoring rock mass specimen; 71 - anchoring fissure rock mass shear pad. DETAILED DESCRIPTION

[0031] In combination Figures 1 to 11 The specific embodiments of a multifunctional dynamic load impact test platform based on spring energy storage and hammer energy supply provided by the present application are described

[0032] The utility model provides a kind of multifunctional dynamic load impact test platform based on spring energy storage and drop hammer energy supply, including double drop hammer high-energy impact mechanism 100, external support protection frame and mobile assembly mechanism 200, double drop hammer high-energy impact mechanism includes twelve guiding support light pole, high-strength spring energy storage mechanism 100-1, double drop hammer impact mechanism 100-2 and sample fixing mechanism, high-strength spring energy storage mechanism 100-1, double drop hammer impact mechanism 100-2 and sample fixing mechanism are separately installed on twelve guiding support light pole, can realize the impact test test of simulating multiple impact conditions and different samples by coordination assembly, in addition, the symmetrical structure formed by double drop hammer can realize shear impact simulation test;Support protection frame is erected outside double drop hammer high-energy impact mechanism 100, greatly improve the safety in the process of impact test;Mobile assembly mechanism 200 can realize the assembly of test mechanism piece before impact test, improve impact test efficiency.

[0033] Twelve guiding support light poles are dispersedly installed between upper bearing plate 1 and lower bearing plate 2, and are divided into positioning light pole 3, guiding light pole 4 and bearing light pole 5, and can be installed at four diagonal positions with a distance of 850mm*650mm, 850mm*400mm and 320mm*250mm from the center of upper bearing plate and lower bearing plate respectively, and there are cutting rings with a depth of 15mm and a height of 50mm at a certain distance on positioning light pole 3 and guiding light pole 4;Two sets of fixed pulley blocks 6 are installed above upper bearing plate 1, for lifting double drop hammer impact mechanism;Impact plate guide rod 7, spring damping pad 8, nitrogen damping rod 9 and sample shear impact pad 10 are installed on lower bearing plate 2, impact plate guide rod 7 is used for positioning and installing sample;Spring damping pad 8 and nitrogen damping rod 9 play a damping role in the test process, to prevent the test platform from being damaged by impact;Sample shear impact pad 10 is used for placing shear sample when shear impact test is realized.

[0034] High-strength spring energy storage mechanism 100-1 is installed on positioning light pole 3, including spring stop ring 11, high-strength spring 12 and spring protection sleeve 13, the inner diameter of spring stop ring 11 is same with the inner diameter of cutting ring of positioning light pole 3, and different impact energies can be increased by adjusting the compression amount of high-strength spring 12.

[0035] The double hammer impact mechanism 100-2 comprises two groups of symmetrically connected hammer body mechanisms and hammer body lifting mechanisms. The hammer body mechanisms are connected by the upper pressure plate 14, the lower pressure plate 15, the connecting plate 16 and the side stop plate 17 to form a box structure. The side stop plate 17 is fixed on the outer side of the upper and lower pressure plates by screws. By disassembling the side stop plate 17, different weights can be placed inside the box to increase the total weight of the hammer. The lower pressure plate 15 of the hammer is connected to two spring compression plates 18 at both ends. The spring compression plates 18 have two through holes with a diameter slightly larger than that of the twelve guide support rods. The through holes pass through the positioning light rod 3 and the guide light rod 4, respectively, to fix the double hammer impact mechanism 100-2 and compress the spring. The spring compression plates at the symmetric positions below the two groups of hammer mechanisms are fixed and connected by a rigid connecting plate to ensure the synchronization of the hammer impact. The upper pressure plate 14 of the hammer is connected to the semi-cylindrical hammer guide seat 19 at both ends, which contacts with the guide light rod 4 and plays a guiding role when the hammer moves up and down. The hammer body hanging shaft frame 20 is fixed above the hammer guide seat 19 and is used to connect the hammer lifting mechanism. There are three groups of symmetric through holes on the parallel extension boss on the hammer body hanging shaft frame 20. The middle through hole is installed with the fixed hanging pin 21, and the two end through holes are installed with the parallel double shaft hanging seat 22. The fixed hanging pin 21 and the parallel double shaft hanging seat 22 form a two-stage connecting device of the hammer body mechanism and the hammer lifting mechanism. The parallel double shaft hanging seat 22 is fixed on a baffle plate by two parallel hanging shafts. The baffle plate and the hammer lifting mechanism are connected by the moving and falling oil cylinder 23 to move the parallel double shaft hanging seat out.

[0036] The hammer lifting mechanism comprises an inner punching plate 24, an outer punching plate 25, a lifting device guide seat 26, a lifting hook 27, a hook shaft 28, a lifting falling oil cylinder 29 and a lifting pulley block 30. The lifting device guide seat 26 is fixed between the inner punching plate 24 and the outer punching plate 25 and plays a guiding role when the hammer lifting mechanism moves up and down. The lifting hook 27 is fixed between the inner punching plate 24 and the outer punching plate 25 by the hook shaft 28. The horizontal end of the lifting hook 27 is connected with the lifting falling oil cylinder 29. When the lifting hook 27 falls, the lower end of the lifting hook 27 hooks the fixed hanging pin 22 to connect the hammer lifting mechanism and the hammer mechanism. The lifting pulley block 30 is fixedly installed between the inner punching plate 24 and the outer punching plate 25 and is used to lift the double hammer impact mechanism 100-2.

[0037] The sample fixing mechanism comprises a fixing beam 31 and an impact plate 32. Four through holes are arranged at four diagonal positions of the fixing beam 31, which is 320 mm x 250 mm away from the center. The fixing beam 31 is installed on the bearing light pole 5. Four locking piston groups 33 are respectively arranged at the front and back of the fixing beam 31, which are used for locking and fixing the fixing beam 31. The fixing beam 31 is connected with two third hydraulic cylinders 34, which can adjust the height of the fixing beam 31. The bottom end of the third hydraulic cylinder 34 is fixed on the lower bearing plate 2. The through hole at the center of the fixing beam 31 and a circle of screw holes around the through hole are used for fixing the sample. The impact plate 32 is a complex multi-hole stretching structure. A row of screw through holes are arranged on the impact platforms at the two ends of the impact plate 32, which can be connected with the lower bearing plate 15 of the drop hammer mechanism through screws, and an impact backing plate 35 can also be installed to prevent the impact plate 32 from being damaged when the drop hammer impacts. Three through holes are distributed on the horizontal bearing plate in the middle of the impact plate 32. A row of screw through holes are also arranged around the middle through hole, which can be used for fixing the anchoring sample. The diameters of the positioning holes on the two sides are slightly larger than the diameter of the impact plate guide rod 7. The impact plate is positioned and installed through the impact plate guide rod 7 and the positioning hole before the test.

[0038] The external support protection frame comprises a first support protection frame and a second bearing protection frame. The first support protection frame is composed of a support steel frame 36 and a glass protection frame 37. The support steel frame is welded by a plurality of hollow square steel pipes. The glass protection frame is installed in front of and on both sides of the support steel frame. The front of the glass protection frame is provided with an openable protection glass door 38.

[0039] The second bearing protection frame comprises a bearing plate 39 and a protection fence 40. The bearing plate 39 is laid on the first support protection frame through a connecting square tube. Two groups of support columns 41 are symmetrically installed on the bearing plate 39, which are connected with the upper bearing plate 1 of the double-drop hammer high-energy impact mechanism. The protection fence 40 is installed around the bearing plate 39. The test platform is equipped with a movable protection staircase 42, which is connected with the first layer and the second layer.

[0040] The movable assembly mechanism is installed at the rear of the external support protection frame, which comprises a bridge support frame, a translation mechanism and a rotation mechanism. The bridge support frame is composed of six square columns 43 and two cross beams 44, which form a parallel bridge platform. The bottom of the column 43 is laid on the bottom pad 45 and fixed on the ground through screws.

[0041] The translation mechanism comprises a movement track, a fixed bearing frame and a transmission mechanism. The movement track is composed of guide rail positioning strips 46, I-shaped guide rails 47 and gear meshing guide rails 48 and is fixed above the crossbeam 44 of the bridge support frame. The fixed bearing frame comprises two parts, i.e. a bearing frame 49 and a transmission mechanism fixed frame 50. The bearing frame 49 is provided below with a sliding block group 51, so that it can translate along the movement track. The transmission mechanism comprises a transmission mechanism 52 and a transmission mechanism fixed seat 53, which are installed on the transmission mechanism fixed frame 50 and below which a transmission gear 54 is installed. The transmission mechanism 52 is driven by the transmission gear to push the translation mechanism to translate along the track.

[0042] The rotation mechanism comprises a rotation support 55, a vertical rod 56, an extendable cantilever beam 57 and a steel wire rope electric hoist 58. The rotation support 55 is fixed on the bearing frame 49 of the translation mechanism, and the vertical rod 56 can rotate horizontally around the rotation support 55. The extendable cantilever beam 57 is connected to the top end of the vertical rod 56 through a rotation string pin 59 and is connected with a two-stage hydraulic cylinder 60. The extendable cantilever beam 57 is controlled to rotate up and down around the rotation string pin 59 by adjusting the oil pressure. The extendable cantilever beam 57 is provided at the tail end with a fixed pulley 61. The motor of the steel wire rope electric hoist 58 is fixed above the rotation cantilever beam 57. The steel wire passes through the fixed pulley 61 at the tail end of the extendable cantilever beam and is connected with a hook 62 at the lower end. A movable magnetic attraction button switch 63 is attracted to the side of the vertical rod.

[0043] As shown in Figure 10 Before the anchor rod is subjected to the tensile impact test by using the above test system, the assembly of the test mechanism is completed by using the mobile assembly mechanism. The anchor rod 64 is fixed between the fixed crossbeam 31 and the impact plate 32. The pressure sensor 65 and the sensor pad 66 are installed at the two ends of the anchor rod 64 and are fixed by the hanger 67, the tray 68 and the nut 69. According to the required impact energy of the test, the compression amount of the high-strength spring 12 and the weight of the drop hammer are calculated. The drop hammer is lifted to the calculated height. When the test starts, the drop hammer is released. The impact load is transmitted to the anchor rod 64 through the impact plate 32, so that the impact mechanical parameters of the anchor rod 64 are obtained.

[0044] In addition, the test system can test the impact mechanical properties of rod-shaped components of any metal material, non-metal material and composite material under the servo control. The system can perform axial impact loading on a large-size anchoring rock mass test piece to test the impact mechanical properties of the anchor rod in the anchoring body. As shown in Figure 11 The test system can also perform shear impact loading on a double-fracture anchoring rock mass to test the shear impact mechanical properties of the anchor rod in the anchoring fractured rock mass.

[0045] Of course, the above description is not a limitation of the present application. The changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the present application should also belong to the protection scope of the present application.

Claims

1. A multifunctional dynamic load impact test platform based on spring energy storage and drop hammer energy supply, characterized in that, The application relates to a double-hammer high-energy impact mechanism, an external support protection frame and a mobile assembly mechanism.

2. The multifunctional dynamic load impact testing platform based on spring energy storage and drop hammer energy supply according to claim 1, characterized in that, The twelve guide support light bars are arranged between the upper bearing plate and the lower bearing plate, and the guide support light bars comprise positioning light bars, guide light bars and bearing light bars, wherein four positioning light bars, four guide light bars and four bearing light bars are arranged at four diagonal positions of the upper bearing plate and the lower bearing plate respectively; cutting rings are arranged on the positioning light bars and the guide light bars; two groups of fixed pulley blocks are arranged above the upper bearing plate; impact plate guide rods, spring damping pads, nitrogen damping rods and sample shearing impact pad blocks are arranged on the lower bearing plate; the impact plate guide rods are used for positioning and mounting samples; the spring damping pads and the nitrogen damping rods are used for damping the test platform; and the sample shearing impact pad blocks are used for placing shearing samples during shearing impact tests.

3. The multi-functional dynamic load impact testing platform based on spring energy storage and drop hammer energy supply according to claim 1 or 2, characterized in that, The mobile assembly mechanism comprises a bridge support frame, a translation mechanism and a rotation mechanism, the bridge support frame is formed into a parallel bridge type platform by assembling and matching a square column and a crossbeam, and the square column is laid with a bottom base plate at the bottom and fixed to the ground through screws.

4. The multi-functional dynamic load impact testing platform based on spring energy storage and drop hammer energy supply according to claim 3, characterized in that, The translation mechanism comprises a motion track, a fixed bearing frame and a transmission mechanism, the motion track is fixed above the support platform crossbeam, and the motion track comprises guide rail positioning strips, I-shaped guide rails and gear meshing guide rails; the fixed bearing frame comprises a bearing frame and a transmission mechanism fixed frame, a sliding block group is arranged below the bearing frame, and the bearing frame translates along the motion track; the transmission mechanism comprises a transmission mechanism and a transmission mechanism fixed seat, the transmission mechanism is installed on the transmission mechanism fixed frame, a transmission gear is installed below the transmission mechanism fixed frame, the transmission mechanism meshes with the driving gear to drive the translation mechanism to translate along the motion track.

5. The multi-functional dynamic load impact testing platform based on spring energy storage and drop hammer energy supply according to claim 4, characterized in that, The rotation mechanism comprises a rotation support, a vertical rod, an extendable cantilever beam and a steel wire rope electric hoist, the rotation support is fixed on the transmission mechanism fixed frame of the translation mechanism, and the vertical rod rotates horizontally around the rotation support; the extendable cantilever beam is connected with the top end of the vertical rod through a rotating string pin, the extendable cantilever beam is also connected with a secondary hydraulic oil cylinder, the secondary hydraulic oil cylinder controls the extendable cantilever beam to rotate up and down around the rotating string pin through extension and retraction, and a fixed pulley is arranged at the tail end of the extendable cantilever beam; the motor of the steel wire rope electric hoist is fixed above the rotating cantilever beam, the steel wire passes through the fixed pulley at the tail end of the extendable cantilever beam, the lower end of the steel wire is connected with a hook, and a movable magnetic attraction button switch is adsorbed on the side surface of the vertical rod.

6. The multi-functional dynamic load impact testing platform based on spring energy storage and drop hammer energy supply according to claim 5, characterized in that, The high-strength spring energy storage mechanism is installed on the positioning light pole, and comprises a spring retaining ring, a high-strength spring and a spring protection sleeve, the inner diameter of the spring retaining ring is the same as the inner diameter of the cutting ring of the positioning light pole, and the impact energy is adjusted by adjusting the compression amount of the high-strength spring.

7. The multi-functional dynamic load impact testing platform based on spring energy storage and drop hammer energy supply according to claim 5, characterized in that, The double-hammer impact mechanism comprises two groups of symmetrically connected hammer body mechanisms and hammer body lifting mechanisms, the hammer body mechanism comprises an upper bearing plate, a lower bearing plate and a side retaining plate, the upper bearing plate, the lower bearing plate and the side retaining plate are connected into a box structure, weights are placed in the box to change the weight, and the side retaining plate is fixed on the outer side of the upper and lower bearing plates through screws; the lower bearing plate of the hammer body mechanism is connected with two spring compression plates at two ends, the spring compression plates are provided with through holes matched with the guiding support light pole, and the through holes pass through the positioning light pole and the guiding light pole respectively; the spring compression plates at symmetric positions below the two groups of hammer body mechanisms are fixedly connected through a rigid connecting plate; the upper bearing plate of the hammer body mechanism is provided with a semicylindrical hammer body guiding seat at two ends and is in contact with the guiding light pole, and the guiding seat plays a guiding role when the hammer body moves up and down, a hammer body hanging shaft frame is fixed above the upper bearing plate and is used for connecting the hammer body lifting mechanism; three groups of symmetric through holes are arranged on one group of parallel stretching bosses on the hammer body hanging shaft frame, a fixed hanging pin is arranged in the middle group of through holes, and parallel double-shaft hanging seats are arranged in the two end through holes, and the fixed hanging pin and the parallel double-shaft hanging seats form a two-stage connecting device of the hammer body mechanism and the hammer body lifting mechanism; the parallel double-shaft hanging seat is composed of two parallel hanging shafts fixed on a retaining plate, and the parallel double-shaft hanging seat is moved out through a moving and falling oil cylinder between the retaining plate and the hammer body lifting mechanism.

8. The multi-functional dynamic load impact testing platform based on spring energy storage and drop hammer energy supply according to claim 7, characterized in that, The hammer body lifting mechanism comprises an inner punching plate, an outer punching plate, a lifting device guiding seat, a lifting hook, a hook shaft, a lifting falling oil cylinder and a lifting pulley set; the lifting device guiding seat is fixed between the inner punching plate and the outer punching plate and plays a guiding role when the hammer body lifting mechanism moves up and down; the lifting hook is fixed between the inner punching plate and the outer punching plate through the hook shaft, the horizontal end of the lifting hook is connected with the lifting falling oil cylinder, the lower end of the lifting hook is connected with the fixed hanging pin when the lifting hook falls, and the hammer body lifting mechanism and the hammer body mechanism are connected; the lifting pulley set is fixedly installed between the inner punching plate and the outer punching plate and is used for lifting the double-hammer impact mechanism.

9. The multi-functional dynamic load impact testing platform based on spring energy storage and drop hammer energy supply according to claim 7, characterized in that, The sample fixing mechanism comprises a fixing beam and an impact plate, four through holes are arranged on the fixing beam, the fixing beam is installed on the bearing light pole, four locking piston groups are respectively arranged on the front and back of the fixing beam, the locking piston groups are used for locking the fixing beam, the fixing beam is connected with two three-stage hydraulic cylinders, the three-stage hydraulic cylinders are used for adjusting the height of the fixing beam, the bottom end of the three-stage hydraulic cylinder is fixed on the lower bearing plate, and the through hole in the center of the fixing beam is used for fixing the sample; the impact plate has a porous stretching structure, screw through holes are arranged on the impact platforms at two ends of the impact plate, the impact platforms are connected with the lower bearing plate of the hammer falling mechanism through screws, an impact pad plate is fixed on the impact platform through screws, and the impact pad plate prevents the impact plate from being damaged when the hammer falls; three through holes are arranged in the middle of the impact plate, and the through holes on the two sides are matched with impact plate guide rods.

10. The multi-functional dynamic load impact testing platform based on spring energy storage and drop hammer energy supply according to claim 7, characterized in that, The one-layer support protection frame comprises a support steel frame and a glass protection frame, wherein the support steel frame is welded by a plurality of hollow square steel pipes; the glass protection frame is installed in front of and on both sides of the support steel frame, and a protection glass door is arranged in front of the glass protection frame; the two-layer bearing protection frame comprises a bearing plate and a protection fence, the bearing plate is laid on the one-layer support protection frame through a connecting square tube, two groups of support columns are symmetrically installed on the bearing plate, and the upper bearing plate is connected with the double-drop hammer high-energy impact mechanism; the protection fence is installed around the bearing plate; the test platform is equipped with a movable protection staircase connected with the one-layer support protection frame and the two-layer bearing protection frame.

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