Explosion model test device

Abstract

This invention discloses a blasting model testing device. The blasting model testing device includes a test frame, a test support plate, a protective box, a lifting driver, a feed chute, and a screening device. The connecting end of the test support plate is rotatably mounted on the test frame. The lifting driver is mounted on the test frame. The protective box is placed on the test frame and covers the test support plate. The protective box is equipped with a front door and a top door. The screening device is used to receive and screen the crushed stone. The feed chute is mounted on the test frame to guide the crushed stone after blasting into the screening device. The feed chute includes a fixed trough, a movable trough, and a telescopic driver. The fixed trough is fixed to the test frame, the movable trough slides on the fixed trough, and the telescopic driver is mounted on the fixed trough. The output end of the telescopic driver is connected to the movable trough. This blasting model testing device can guide crushed stone into the screening device and classify and weigh the crushed stone, shortening the testing time.

Description

Technical Field

[0001] This invention relates to the field of blasting test technology, and in particular to a blasting model test device. Background Technology

[0002] When studying the influence of boundary constraints on the rock blasting effect, it is necessary to collect the debris after blasting the rock model, classify it according to different particle sizes, and judge the blasting effect based on the distribution of the debris. During debris collection, the experimenter usually manually collects the debris from the protective box. This method is inefficient. After collection, the debris is sieved using sieves with different mesh sizes. Different sieves are required for different particle sizes, necessitating multiple sieve operations. After sieving, the debris in each sieve is weighed. Sieving and weighing are performed using different equipment, making the operation complex. Manual sieving is slow, and the sieves can get stuck with debris, affecting sieving efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a blasting model test device that can automatically feed crushed stone into a screening device.

[0004] To address the aforementioned problems, this invention provides a blasting model testing device. The device includes a test frame, a test support plate, a protective box, a lifting driver, a material guide chute, and a screening device. The connecting end of the test support plate is rotatably mounted on the test frame. The lifting driver is mounted on the test frame. The protective box is placed on the test frame and covers the test support plate. The protective box has a front door and a top door. The connecting end of the front door and the test support plate is located on the same side of the protective box. The screening device is arranged on the side of the test frame located at the front door. The screening device receives and screens the crushed stone. The material guide chute is mounted on the test frame to guide the crushed stone after blasting into the screening device. The material guide chute includes a fixed trough, a movable trough, and a telescopic driver. The fixed trough is fixed to the test frame. The movable trough is slidably mounted on the fixed trough. The telescopic driver is mounted on the fixed trough, and its output end is connected to the movable trough.

[0005] Furthermore, the screening device includes a screen for classifying and screening gravel of different sizes, a weighing device, a reciprocating drive mechanism for driving the screen to move back and forth, a traction mechanism for pulling the screen, a cleaning device for clearing gravel stuck in the screen, and a mounting frame for mounting the traction mechanism. The traction mechanism is connected to the screen, and the reciprocating drive mechanism is connected to the screen. The screen includes a base box and multiple screening boxes with different screen hole sizes. The multiple screening boxes are stacked sequentially on the base box, and the screen holes of the screening boxes gradually decrease from top to bottom. The adjacent screening boxes are also connected by flexible connectors.

[0006] Furthermore, the cleaning device includes a power drive, a transmission mechanism, and a cleaning assembly. The power drive is connected to the transmission mechanism, which has a drive plate with a drive hole. The cleaning assembly includes a cleaning brush, pulleys, mounting bases, gears, and hanging rails. The hanging rails are mounted on the screening box, with hanging rails installed on both sides of the screening box. A pulley is slidably mounted on each hanging rail, and the pulley is rotatably mounted on the mounting base. Both ends of the cleaning brush are rotatably mounted on the two mounting bases via shafts. Limiting elements for restricting the pulleys are mounted on the hanging rails. A transmission rod is mounted on each mounting base, and the transmission rod is connected to the drive plate. A gear is also mounted on the shaft of the cleaning brush, and teeth are provided on the lower end face of the hanging rails, with the gear meshing with the teeth.

[0007] Furthermore, the transmission mechanism includes a telescopic transmission shaft, a connecting seat, a guide assembly, a sliding assembly, a retraction driver, and a drive plate. One end of the telescopic transmission shaft is connected to the power driver, and the other end of the telescopic transmission shaft is connected to the sliding assembly. The connecting seat is screwed onto the telescopic transmission shaft. The guide assembly is mounted on the mounting bracket, and the connecting seat is connected to the guide assembly. The retraction driver is mounted on the connecting seat, and the drive plate is mounted on the retraction driver. The connecting seat is connected to the cleaning assembly.

[0008] Furthermore, the drive plate is provided with a drive hole, and the transmission rod is inserted into the drive hole. The drive hole on the drive plate is formed by a downward indentation on the top surface of the drive plate.

[0009] Furthermore, the screening device also includes a weighing device for weighing the screening box and the bottom box. The traction mechanism includes a traction rope, a traction motor, and a winding wheel. The winding wheel is mounted on the output shaft of the traction motor. One end of the traction rope is fixed to the winding wheel, and the other end of the traction rope is connected to the screening box.

[0010] Furthermore, the screening device also includes a reciprocating drive mechanism, which includes a reciprocating motor, a drive wheel, and a connecting rod. One end of the connecting rod is eccentrically mounted on the drive wheel. The bottom box is also provided with a connecting plate, which consists of two plates, each with a connecting groove. The other end of the connecting rod is T-shaped and is engaged in the connecting groove of the bottom box.

[0011] Furthermore, it also includes a gripping device for gripping the rock model. The gripping device includes a truss, a floating seat, a mounting plate, a gripping motor, a drilling motor, a drill rod, a transmission assembly, grippers, a transverse slide rail, a limiting component, and a positioning rod. The floating seat is mounted on the truss, the mounting plate is mounted on the floating seat, the gripping motor is mounted on the mounting plate, the transmission assembly is mounted on the mounting plate, the gripping motor is connected to the transmission assembly, the gripping motor drives the transmission assembly, the transverse slide rail is mounted on the mounting plate, the grippers slide on the corresponding transverse slide rail, the transmission assembly is connected to the grippers, the positioning rod is mounted on the mounting plate, the drilling motor is mounted on the floating seat, the drill rod is connected to the drilling motor, and the drill rod passes through the transmission assembly.

[0012] Furthermore, the transmission assembly includes an output gear, a transmission gear, a transmission sleeve, a lifting nut, and a connecting rod. The output gear is mounted on the output shaft of the gripping motor, the transmission gear is mounted on the transmission sleeve, and the output gear meshes with the transmission gear. The transmission sleeve is rotatably mounted on the mounting plate via a bearing and has an external thread. The lifting nut is screwed onto the transmission sleeve, one end of the connecting rod is pivotally connected to the lifting nut, and the other end of the connecting rod is pivotally connected to the gripper.

[0013] Furthermore, the floating seat includes an upper connecting plate, a movable seat, a connecting block, a lower connecting plate, a first floating rod, a second floating rod, a third floating rod, a first spring, a second spring, and a third spring. The upper connecting plate is mounted on the truss. Both ends of the first floating rod are respectively mounted on the upper connecting plate. The movable seat is slidably mounted on the first floating rod. The first spring is sleeved on the first floating rod. First springs are provided on both sides of the movable seat. A second floating rod is provided on the movable seat. The connecting block is slidably mounted on the second floating rod. The second spring is sleeved on the second floating rod. The lower connecting plate is mounted on the connecting block. The upper end of the third floating rod is slidably mounted on the lower connecting plate. An anti-loosening nut is installed on the upper end of the third floating rod located on the lower connecting plate. The lower end of the third floating rod is fixed on the mounting plate. The third spring is sleeved on the third floating rod.

[0014] After the blasting model test device of this invention is completed, the front box door is opened and the lifting driver lifts the test bearing plate, causing the test bearing plate to tilt, thereby discharging the gravel scattered on the test bearing plate into the guide chute. The guide chute introduces the gravel into the screening device for mechanical screening, eliminating the need for manual collection and improving collection efficiency. At the same time, the use of mechanical screening further improves the screening efficiency, thereby shortening the overall test time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred embodiment of the automatic feeding blasting model testing device of the present invention.

[0016] Figure 2 This is a schematic diagram of the protective box installed on the test frame.

[0017] Figure 3 This is a schematic diagram of the internal structure of the protective box.

[0018] Figure 4 yes Figure 2 A magnified view of part A in the image.

[0019] Figure 5 This is a schematic diagram of the structure supporting the flat plate.

[0020] Figure 6 This is a side view of the protective box.

[0021] Figure 7 This is a structural diagram of the top box door and the protective box.

[0022] Figure 8 This is a schematic diagram of the gripping device.

[0023] Figure 9 This is the front view of the gripping device.

[0024] Figure 10 This is a side view of the gripping device.

[0025] Figure 11 This is a schematic diagram of the transmission assembly.

[0026] Figure 12 This is a schematic diagram of the structure when the grippers place the steel ring.

[0027] Figure 13 This is a schematic diagram of the material guide trough.

[0028] Figure 14 This is a structural diagram of the movable tank and the fixed tank.

[0029] Figure 15 This is a sectional view of the movable tank.

[0030] Figure 16This is a schematic diagram of the screening device.

[0031] Figure 17 This is the front view of the screening device.

[0032] Figure 18 yes Figure 16 A magnified view of part B in the image.

[0033] Figure 19 This is a structural diagram of the bottom box.

[0034] Figure 20 This is a schematic diagram of the transmission assembly.

[0035] Figure 21 This is a schematic diagram of the telescopic drive shaft.

[0036] Figure 22 yes Figure 16 A magnified view of part C.

[0037] Figure 23 This is a structural diagram of the cleanup component.

[0038] Figure 24 This is a schematic diagram of the driver board.

[0039] The meanings of the labels in the attached diagram are as follows: Test frame 1, frame body 11, bearing plate 12, support plate 13, rotating shaft connecting plate 14, test bearing plate 21, drive connecting plate 211, protective box 22, front box door 221, positioning notch 222, top box door 223, lifting drive 23, front door drive 24, top door drive 25, bracket 26, support rod 27, gripping device 3, truss 30, floating seat 31, upper connecting plate 311, movable seat 312, connecting block 313, lower connecting plate 314, first floating rod 3151, second floating rod 3152, third floating rod 3 153. First spring 3161, second spring 3162, third spring 3163, mounting plate 32, gripping motor 331, drilling motor 332, transmission assembly 34, output gear 341, transmission gear 342, transmission sleeve 343, lifting nut 344, linkage rod 345, drill rod 35, gripper 36, anti-slip pad 361, transverse slide rail 37, limiting component 38, positioning rod 39, rolling component 391, rock model 41, steel ring 42, guide trough 43, fixed trough 431, movable trough 432, hanging groove 4321. Screening device 5, screening box 51, hook 511, positioning column 512, positioning plate 513, positioning hole 5131, traveling wheel 514, flexible connector 515, base box 52, connecting plate 521, connecting groove 5211, screen hole 522, weighing device 53, reciprocating drive mechanism 54, reciprocating motor 541, drive wheel 542, connecting rod 543, traction mechanism 55, traction rope 551, traction motor 552, winding wheel 553, cleaning device 56, power drive 561, transmission mechanism 562, telescopic transmission shaft 5621, etc. 56211, 56212, spline, 56213, connecting seat, 5622, guide assembly, 5623, guide seat, 56231, guide rod, 56232, sliding assembly, 5624, transmission slide rail, 56241, slide block, 56242, retraction driver, 5625, drive plate, 56261, drive hole, cleaning assembly, 563, cleaning brush, ejector pin, 56311, pulley, 5632, mounting seat, 5633, gear, 5634, hanging rail, 5635, transmission rod, 5636, mounting bracket, 57. Detailed Implementation

[0040] The invention will now be further described with reference to the accompanying drawings.

[0041] like Figure 1As shown, a preferred embodiment of the blasting model testing device of the present invention includes a test frame 1, a test support plate 21, a protective box 22, a lifting actuator 23, and a gripping device 3. The connecting end of the test support plate 21 is rotatably mounted on the test frame 1. The test support plate 21 is used to support the blasted rock model 41 and simultaneously collect the blasted debris. The lifting actuator 23 is mounted on the test frame 1 and is used to lift the test support plate 21, causing it to tilt to displace the debris. The lifting actuator 23 is typically a pneumatic cylinder; however, in other embodiments, a hydraulic cylinder or electric cylinder can also be used. The protective box 22 is placed on the test frame 1 and covers the test support plate 21. The protective box 22 is used to limit the location of the debris during blasting, ensuring that all the debris falls onto the test support plate 21. The protective box 22 is equipped with a front door 221. The connection end of the front door 221 and the test support plate 21 is located on the same side of the protective box 22. The bottom surface of the front door 221 is lower than the top surface of the test support plate 21, thus ensuring that all the gravel can fall off the test support plate 21. The gripping device 3 is used to grip the rock model 41 and the steel ring 42 and place them on the test support plate 21, while simultaneously drilling holes in the rock model 41. The screening device 5 is arranged on one side of the test frame 1, on the same side as the front door 221. The screening device 5 is used to screen the gravel, classifying it according to the particle size and weighing the screened gravel. The test frame 1 is equipped with a guide trough 43, which guides the gravel into the screening device 5.

[0042] like Figures 2 to 7 As shown, the test frame 1 includes a frame body 11, a support plate 12, and a support plate 13, both of which are mounted on the frame body 11. The support plate 13 is located below the support plate 12, and the lower end of the lifting actuator 23 is pivotally connected to the support plate 13. The support plate 12 is used to place items and has a clearance notch. The test support plate 21 is located within the clearance notch, and the output end of the lifting actuator 23 passes through the frame body 11 and connects to the test support plate 21. A drive connecting plate 211 is provided on the test support plate 21, which is used to connect to the lifting actuator 23. The lifting actuator 23 is connected to a connecting shaft that is connected to the drive connecting plate 211, meaning that the connecting shaft on the lifting actuator 23 is rotatably mounted on the drive connecting plate 211.

[0043] The connecting end of the test support plate 21 is provided with an arc surface to ensure that the connecting end can rotate smoothly during rotation and to ensure that it will not interfere with the test frame 1.

[0044] The test frame 1 is provided with a rotating shaft connecting plate 14, and the connecting end of the test bearing plate 21 is provided with a shaft rod, which is rotatably connected to the rotating shaft connecting plate 14.

[0045] The protective box 22 has a positioning notch 222 facing downwards. The positioning notch 222 is used to cooperate with the rotating shaft connecting plate 14 to fix the protective box 22 and prevent it from moving. The protective box 22 is provided with a front door actuator 24, which is pivotally connected to the protective box 22. The output end of the front door actuator 24 is pivotally connected to the front door 221. The front door actuator 24 is usually a cylinder, but it can also be a hydraulic cylinder or an electric cylinder. When the front door actuator 24 extends, the front door 221 closes; when the front door actuator 24 retracts, the front door 221 opens, allowing the actuator to reach into the protective box 22 for operation. The protective box 22 is also provided with a top box door 223, which is slidably mounted on the protective box 22. The top box door 223 slides outward to open the protective box 22, allowing the aforementioned gripping mechanism to extend into the protective box 22 and place the rock model 41 or protective component onto the test support plate 21. The top plate of the protective box 22 serves as the top box door 223, and a step is provided on the protective box 22, with the top box door 223 slidably mounted on the step. The test frame 1 is equipped with a top door actuator 25, which is mounted on the test frame 1 via a bracket 26. A support rod 27 is installed at the output end of the top door actuator 25, and the support rod 27 is fixed to the top box door 223. The top door actuator 25 is usually a pneumatic cylinder, but a hydraulic cylinder or an electric cylinder can also be used. When the top door actuator 25 extends, the top box door 223 opens; when the top door actuator 25 retracts, the top box door 223 closes.

[0046] When it is necessary to collect gravel, the front door actuator 24 extends to open the front door 221, and then the lifting actuator 23 lifts the rear end of the test support plate 21, causing the test support plate 21 to tilt, thereby pouring the gravel out into the screening device 5. After completion, the lifting actuator 23 resets, driving the test support plate 21 to reset, facilitating the next test. This method can quickly collect gravel, is convenient and fast, and requires no manual collection.

[0047] like Figures 8 to 10As shown, the gripping device 3 includes a truss 30, a floating seat 31, a mounting plate 32, a gripping motor 331, a transmission assembly 34, a drilling motor 332, a drill rod 35, grippers 36, a transverse slide rail 37, a limiting component 38, and a positioning rod 39. The truss 30 is capable of moving in the transverse, longitudinal, and vertical directions. The truss 30 is a conventional device, and its working principle and structure will not be described in detail here. The floating seat 31 is mounted on the truss 30, and the mounting plate 32 is mounted on the floating seat 31. The mounting plate 32 can float in the transverse, longitudinal, and vertical directions relying on the floating seat 31. The gripping motor 331 is mounted on the mounting plate 32, located on its top surface. The mounting plate 32 has mounting holes, and the transmission assembly 34 is installed within these holes. The gripping motor 331 is connected to the transmission assembly 34, and drives the transmission assembly 34. The transverse slide rails 37 are mounted on the mounting plate 32. There are two transverse slide rails 37, which are symmetrically arranged and located on the bottom surface of the mounting base 332. There are two grippers 36, which are slidably mounted on their respective transverse slide rails 37. The transmission component 34 is connected to the two grippers 36 and drives them to move in opposite directions, thereby gripping or releasing objects. There are two positioning rods 39, both mounted on the mounting base 332 and symmetrically arranged. The positioning rods 39 are used to cooperate with the rock model 41 placed on the test support plate 21 to position the mounting base 332, thereby ensuring that the gripped steel ring 42 is concentrically placed with the rock model 41. The drilling motor 332 is mounted on the floating seat 31, and the drill rod 35 is inserted into the transmission assembly 34, with its lower end extending out of the transmission assembly 34. The drilling motor 332 drives the drill rod 35 to rotate, thereby drilling a hole at the center of the rock model 41, thus forming a blast hole on the rock model 41. The limiting member 38 is mounted on the mounting base 332, located on the top surface of the mounting base 332. The limiting member 38 is used to limit the minimum vertical distance between the mounting base 332 and the floating seat 31 to ensure the safety of the gripping motor 331 and the drilling motor 332, preventing them from being squeezed by the floating seat 31 and the mounting base 332. The lower end of the limiting member 38 is lower than the lower end of the gripper 36. In this way, the limiting member 38 will contact the rock model 41 first before the gripper 36. This ensures that the steel ring 42 is positioned first and then makes contact with the test support plate 21 each time it is placed, and the steel ring 42 will not slide on the test support plate 21, thus preventing damage to the steel ring 42 or the test support plate 21.The lower end of the drill rod 35 is higher than the lower end of the jaw 36, which ensures that the drill rod 35 will not come into contact with the rock model 41 when drilling is not required.

[0048] The floating seat 31 includes an upper connecting plate 311, a movable seat 312, a connecting block 313, a lower connecting plate 314, a first floating rod 3151, a second floating rod 3152, a third floating rod 3153, a first spring 3161, a second spring 3162, and a third spring 3163. There are two upper connecting plates 311, which are used to connect to the truss 30, i.e., the upper connecting plates 311 are mounted on the truss 30. The two ends of the first floating rod 3151 are respectively mounted on the upper connecting plates 311. The movable seat 312 is mounted on the first floating rod 3151 and is located between the two upper connecting plates 311. Of course, in other embodiments, the upper connecting plate 311 can also be a U-shaped plate. The first spring 3161 is sleeved on the first floating rod 3151. A first spring 3161 is provided on both sides of the movable seat 312. The two ends of the first spring 3161 abut against the movable seat 312 and the upper connecting plate 311, respectively. Thus, the first spring 3161 can return the movable seat 312 to its original position whenever it moves laterally. A second floating rod 3152 is provided on the movable seat 312. The connecting block 313 is slidably mounted on the second floating rod 3152 and can slide on it. The second spring 3162 is sleeved on the second floating rod 3152. A second spring 3162 is provided on both sides of the connecting block 313. The two ends of the second spring 3162 abut against the movable seat 312 and the connecting block 313, respectively. Thus, the second spring 3162 can return the connecting block 313 to its original position whenever it slides on the second floating rod 3152. The lower connecting plate 314 is mounted on the connecting block 313. The upper end of the third floating rod 3153 is slidably mounted on the lower connecting plate 314. An anti-loosening nut is installed on the upper end of the third floating rod 3153 on the lower connecting plate 314. The lower end of the third floating rod 3153 is fixed on the mounting base 332, so the mounting base 332 can float in the vertical direction and automatically reset by gravity. The drilling motor 332 is mounted on the bottom surface of the lower connecting plate 314. The third spring 3163 is sleeved on the third floating rod 3153. The third spring 3163 is used to slow down the speed at which the distance between the mounting base 332 and the lower connecting plate 314 decreases, so that the drill rod 35 can slowly contact the rock model 41, avoiding a strong impact on the rock model 41, and thus protecting the drill rod 35 from damage due to impact.

[0049] like Figure 11As shown, the transmission assembly 34 includes an output gear 341, a transmission gear 342, a transmission sleeve 343, a lifting nut 344, and a linkage rod 345. The output gear 341 is mounted on the output shaft of the gripping motor 331, and the transmission gear 342 is mounted on the transmission sleeve 343. The output gear 341 meshes with the transmission gear 342. Both the output gear 341 and the transmission gear 342 are bevel gears 5634, which allows the gripping motor 331 to be positioned on one side of the transmission sleeve 343, and the drilling motor 332 to be mounted above the transmission sleeve 343. The transmission sleeve 343 is rotatably mounted on the mounting base 332 via bearings. The transmission gear 342 drives the transmission sleeve 343 to rotate. The transmission sleeve 343 has a through hole at its center for inserting a drill rod 35, ensuring that the lower end of the drill rod 35 is located below the mounting base 332 for easy drilling. The transmission sleeve 343 is provided with external threads, and the lifting nut 344 is screwed onto the transmission sleeve 343. The rotation of the transmission sleeve 343 drives the lifting nut 344 to move up and down. One end of the linkage rod 345 is pivotally connected to the lifting nut 344, and the other end of the linkage rod 345 is pivotally connected to the gripper 36. Each gripper 36 is connected to at least one linkage rod 345. The up and down movement of the lifting nut 344 pulls the two grippers 36 to move in opposite directions or towards each other through the linkage rod 345.

[0050] like Figure 12As shown, when it is necessary to grasp the rock model 41 or the steel ring 42, the truss 30 drives the grasping mechanism to move to the position of the steel ring 42 or the rock model 41. Then, the grasping motor 331 drives the output gear 341 to rotate. The output gear 341 drives the transmission gear 342 to rotate. The transmission gear 342 drives the transmission sleeve 343 to rotate. The rotation of the transmission sleeve 343 causes the lifting nut 344 to move upward. The upward movement of the lifting nut 344 causes the linkage rod 345 to move. The movement of the linkage rod 345 causes the two grippers 36 to move towards each other, thereby grasping the rock model 41 or the steel ring 42 and completing the grasping. Conversely, the steel ring 42 or the rock model 41 can be released. When the rock model 41 is grasped, during the descent of the steel ring 42, the limiting member 38 first contacts the rock model 41. Under the action of the floating seat 31, the limiting member 38 automatically corrects its position, placing the steel ring 42 concentrically with the rock model 41. Since the gripper 36 still holds the steel ring 42 at this time, the mounting seat 332 will not move downwards. Due to the third spring 3163, the downward speed is reduced, and the steel ring 42 will not violently impact the test bearing plate 21. After the steel ring 42 is placed, the truss 30 continues to move downwards, driving the upper connecting plate 311 downwards. Simultaneously, the drilling motor 332 starts rotating, and the drill rod 35 slowly contacts the rock model 41 to drill a hole. After the drill rod 35 contacts the rock model 41, the grasping motor 331 drives the gripper 36 to release the steel ring 42, preventing the gripper 36 from restricting the downward movement of the drill rod 35. Throughout the entire process, there is no need for manual handling of the steel ring 42 and the rock model 41; mechanical gripping and placement saves time and effort. The process of placing the steel ring 42 can complete the machining of the blast holes in the rock model 41, which is highly efficient.

[0051] The positioning rod 39 is provided with a rolling element 391, which contacts the rock model 41. This enables rolling friction and effectively avoids damage to the rock model 41. Compared with the limiting element 38, which directly slides and rubs against the rock model 41, the service life of the limiting element 38 is extended.

[0052] The gripper 36 is provided with an anti-slip pad 361, which is used to increase friction and improve the gripping force on the rock model 41 and the steel ring 42; the anti-slip pad 361 is usually made of rubber.

[0053] like Figures 13 to 15As shown, the feed trough 43 includes a fixed trough 431, a movable trough 432, and a telescopic actuator. The fixed trough 431 is fixed to the test frame 1, the movable trough 432 is slidably disposed on the fixed trough 431, and the telescopic actuator is mounted on the fixed trough 431, with its output end connected to the movable trough 432. Specifically, the top of the movable trough 432 is bent to form a hanging groove 4321, and the movable trough 432 is hung on the fixed trough 431 through the hanging groove 4321, allowing the movable trough 432 to slide on the fixed trough 431. When the screening device 5 performs weighing, the telescopic actuator resets, causing the movable trough 432 to move backward. After the screening device 5 completes weighing, the telescopic actuator drives the movable trough 432 to move forward, facilitating the next guidance of crushed stone into the screening device 5.

[0054] like Figures 16 to 18As shown, the screening device 5 includes a screener, a weighing device 53, a reciprocating drive mechanism 54, a traction mechanism 55, a cleaning device 56, and a mounting frame 57. The screener classifies and screens gravel of different sizes. The screener includes a base box 52 and multiple screening boxes 51, which are stacked sequentially on the base box 52. The screening holes 522 of the multiple screening boxes 51 are of different sizes, so that each screening box 51 can screen gravel of corresponding size according to its own screening holes 522. The multiple screening boxes 51 are stacked sequentially on the base box 52, and adjacent screening boxes 51 are connected by flexible connectors 515 to ensure that the screening box 51 located above can pull the screening box 51 below. The screening boxes 51 are arranged from top to bottom. The lower sieve aperture 522 gradually decreases in size to ensure that the sieve box 51 can sieve all types of crushed stone. The length of the flexible connector 515 is greater than the distance between the connection points of two adjacent sieve boxes 51. This ensures that after the upper sieve box 51 moves upward and is suspended in the air, the lower sieve box 51 still overlaps the sieve box 51 or the base box 52. The upper sieve box 51 can continue to move to move the lower sieve box 51 upward. The flexible connector 515 can be a connecting rope or a connecting rope with O-rings tied to both ends. The base box 52 is used to receive crushed stone of the smallest particle size classification. The base box 52 is placed on the weighing device 53. The weighing device 53 is used to weigh the items on it. The weighing device 53 can be a weighbridge or other weighing equipment. It is located in a position that facilitates the movement of the base box 52. Usually, the top surface of the weighing device 53 is set to be flush with the ground. The reciprocating drive mechanism 54 is connected to the bottom box 52. The reciprocating drive mechanism 54 drives the bottom box 52 to reciprocate, thereby causing the bottom box 52 and the screening box 51 mounted on the bottom box 52 to reciprocate, allowing the crushed stone in the screening box 51 to be screened, achieving the purpose of sieving crushed stone. The traction mechanism 55 is mounted on the mounting frame 57. The traction mechanism 55 is used to pull the uppermost screening box 51 upward, thus reducing the number of screening boxes 51 and the crushed stone screened by each screening box 51. By subtracting the weight of the screening boxes 51 from the total weight, the weight of the screening boxes 51 and the corresponding crushed stone can be obtained. Subtracting the weight of the screening boxes 51 again gives the weight of the crushed stone, allowing the calculation of the weight of the crushed stone in this size category. The cleaning device 56 is mounted on the mounting frame 57 and connected to all the screening boxes 51. The cleaning device 56 is used to remove the stuck gravel from the screening boxes 51, ensuring that all the gravel on the screening boxes 51 can be completely removed before the next use. The reciprocating drive mechanism 54 drives the bottom box 52 to move left and right back and forth. The left and right reciprocating movement of the bottom box 52 drives the left and right reciprocating movement of multiple different screening boxes 51, realizing the classification and screening of gravel of different sizes.

[0055] Upon first use, the weighing device 53 weighs the bottom box 52 and the screening box 51 to obtain their individual weights. The weight of a single screening box 51 is set as 'a', and the weight of the bottom box 52 is set as 'b'. After screening, the weighing device 53 weighs the crushed stone to obtain the total weight of the bottom box 52 and the screening box 51. Since the weights of the bottom box 52 and the screening box 51 are known, the total weight of the crushed stone can be determined. The total weight of the crushed stone, bottom box 52, and screening box 51 is defined as 'c', and the total weight of the crushed stone is defined as 'd'. Then, 'd' = 'cb' - 'na', where 'n' is the number of screening boxes 51. The traction mechanism 55 moves the first screening box 51 upward a predetermined distance from top to bottom. At this time, the flexible connector 515 connecting the first screening box 51 and the second screening box 51 is not straightened. Then, the weighing device 53 weighs the box to obtain the weight e. The weight of the crushed stone in the first screening box 51 can be calculated as: total weight c - weight e - weight a of a single screening box 51. Then, the mechanism continues to pull upward to lift the second screening box 51 into the air. At the same time, the flexible connector 515 between the second screening box 51 and the third screening box 51 is not straightened. The weighing device 53 weighs the box again to obtain the weight f. The weight of the crushed stone in the second screening box 51 can be calculated as: weight e - weight f - weight a of a single screening box 51. By repeating this process, the weight of the crushed stone in each screening box 51 can be calculated. After all the screening boxes 51 are moved upwards, they are weighed to obtain the weight g. The weight of the crushed stone in the bottom box 52 is the weight g minus the weight b of the bottom box 52. Therefore, all the sorted crushed stone can be weighed. This system can not only screen and classify but also weigh the screened crushed stone, all done on the same machine, eliminating the need for moving between multiple machines and making it easy to operate.

[0056] The screening box 51 is equipped with hooks 511, which are used to connect to the traction mechanism 55 or to the flexible connector 515. To ensure stable lifting of the screening box 51, two hooks 511 are provided on each side of the screening box 51. To ensure that the screening box 51 does not fall off during reciprocating movement, a positioning post 512 and a positioning plate 513 are provided on the screening box 51. The positioning plate 513 is located above the screening box 51, and the positioning post 512 is located below the screening box 51. The positioning plate 513 is provided with positioning holes 5131. The positioning post 512 of the adjacent upper screening box 51 is inserted into the positioning hole 5131 of the lower screening box 51, thus fixing the adjacent screening boxes 51 and ensuring that the screening boxes 51 do not fall off during reciprocating movement. There are four positioning plates 513 and four positioning columns 512. Two positioning plates 513 and two positioning columns 512 are provided on each side of the screening box 51. In other embodiments, more or fewer positioning plates 513 and positioning columns 512 can be provided as needed.

[0057] Combination Figure 19For reference, to facilitate the reciprocating movement of the base box 52, casters 514 are provided on the base box 52, allowing it to easily move back and forth under the reciprocating drive mechanism 54, and also enabling easy movement of the base box 52. A positioning plate 513 is provided on the base box 52, with positioning holes 5131 for positioning the positioning posts 512 on the screening box 51, ensuring that the screening box 51 can stably reciprocate synchronously with the base box 52 and will not fall off. Two connecting plates 521 are also provided on the base box 52, each with a connecting groove 5211 for connecting to the reciprocating drive mechanism 54.

[0058] like Figure 16 As shown, the reciprocating drive mechanism 54 includes a reciprocating motor 541, a drive wheel 542, and a connecting rod 543. The drive wheel 542 is mounted on the output shaft of the reciprocating motor 541. One end of the connecting rod 543 is eccentrically mounted on the drive wheel 542, and the other end of the connecting rod 543 is connected to the base box 52. Specifically, the other end of the connecting rod 543 is T-shaped and is engaged in the connecting groove 5211 of the base box 52. The connecting groove 5211 is formed by a downward indentation at the top of the connecting plate 521, which facilitates the removal of the connecting rod 543 from the connecting groove 5211. The height of the connecting groove 5211 is greater than the diameter of the connecting rod 543, thus ensuring that the connecting rod 543 can only be manually removed from the connecting groove 5211.

[0059] The traction mechanism 55 includes a traction rope 551, a traction motor 552, and a take-up reel 553. The traction motor 552 is mounted on the mounting bracket 57 and provides power. The take-up reel 553 is mounted on the output shaft of the traction motor 552, and the traction motor 552 drives the take-up reel 553 to rotate. One end of the traction rope 551 is fixed to the take-up reel 553, and the other end is connected to the screening box 51. The take-up reel 553 is used to wind up or release the traction rope 551, thereby changing the height of the screening box 51. There are four traction motors 552, each corresponding to one take-up reel 553 and one traction rope 551. When the screening box 51 needs to be moved upwards, the traction motor 552 rotates, driving the traction rope 551 to pull the screening box 51 upwards. In other embodiments, the traction mechanism 55 can also use an electric slide table to replace the traction motor 552 and the winding wheel 553; of course, in order to save the traction motor 552, a combination of a single motor and a transmission sprocket and chain can be used to drive two transmission shafts to rotate, and winding wheels 553 are installed at both ends of the two rotating shafts, thus reducing the traction motor 552.

[0060] like Figure 16 and Figure 17 As shown, the cleaning device 56 includes a power driver 561, a transmission mechanism 562, and multiple cleaning components 563. The power driver 561 provides power, and its output end is connected to the transmission mechanism 562. The transmission mechanism 562 is connected to the cleaning components 563 and transmits power to drive the cleaning components 563 to move along the length of the screening box 51. The cleaning components 563 are used to clean the gravel stuck inside the screening box 51. When cleaning is required, the power driver 561 drives the transmission mechanism 562, which in turn drives all the cleaning components 563 to reciprocate on their respective screening boxes 51 to clean the gravel stuck inside.

[0061] Combination Figure 20 Referring to the transmission mechanism 562, it includes a telescopic transmission shaft 5621, a connecting seat 5622, a guide assembly 5623, a sliding assembly 5624, a retraction actuator 5625, and a drive plate 5626. One end of the telescopic transmission shaft 5621 is connected to the power actuator 561, and the other end is connected to the sliding assembly 5624. The connecting seat 5622 is screwed onto the telescopic transmission shaft 5621. The telescopic transmission shaft 5621 can extend and retract to accommodate the reciprocating movement of the base box 52. The retraction actuator 5625 is mounted on the connecting seat 5622, and the drive plate 5626 is mounted on the retraction actuator 5625. The retraction actuator 5625 is used to drive the drive plate 5626 to move, so that the drive plate 5626 can be separated from or connected to the cleaning assembly 563. The retraction actuator 5625 is a cylinder; however, in other embodiments, a hydraulic cylinder or an electric cylinder or other power device can also be used. The power driver 561 drives the telescopic transmission shaft 5621 to rotate. The telescopic transmission shaft 5621 drives the connecting seat 5622 to move along the axial direction of the telescopic transmission shaft 5621. The movement of the connecting seat 5622 drives the retraction driver 5625 and the drive plate 5626 to move. The drive plate 5626 drives the cleaning assembly 563 to move. The guide assembly 5623 is mounted on the mounting bracket 57. The connecting seat 5622 is connected to the guide assembly 5623. The guide assembly 5623 is used to guide the connecting seat 5622 to move smoothly.

[0062] like Figure 21As shown, the telescopic transmission shaft 5621 includes a first shaft 56211 and a second shaft 56212. The first shaft 56211 passes through the second shaft 56212. A first keyway is provided on the first shaft 56211, and a spline 56213 is provided within the first keyway. A second keyway is provided within the second shaft 56212, and the spline 56213 on the first shaft 56211 mates with the second keyway. This structure allows the first shaft 56211 to drive the second shaft when it rotates, while the second shaft 56212 can move along the axial direction of the first shaft 56211. The first shaft 56211 is connected to the power driver 561, which drives the first shaft 56211. The second shaft 56212 is connected to the sliding assembly 5624.

[0063] like Figure 22 As shown, the sliding assembly 5624 includes a transmission slide rail 56241 and a slide block 56242. The transmission slide rail 56241 is mounted on the mounting bracket 57, and the slide block 56242 is slidably disposed on the transmission slide rail 56241. The second shaft 56212 of the telescopic transmission shaft 5621 is mounted on the slide block 56242 via a bearing. This allows the slide block 56242 to support the axial movement of the second shaft 56212 on the first shaft 56211. That is, when the screening box 51 is reciprocated by the traction mechanism 55, the drive plate 5626 of the transmission mechanism 562 is driven to reciprocate by the screening box 51, and the drive plate 5626 slides on the transmission slide rail 56241.

[0064] like Figure 17 and Figure 20 As shown, the guide assembly 5623 includes a guide seat 56231 and a guide rod 56232. The two ends of the guide rod 56232 are mounted on the two guide seats 56231. The guide rod 56232 passes through the connecting seat 5622, and the connecting seat 5622 can slide on the guide rod 56232.

[0065] like Figure 23As shown, the cleaning assembly 563 includes a cleaning brush 5631, a pulley 5632, a mounting base 5633, a gear 5634, a hanging rail 5635, and a transmission rod 5636. The hanging rail 5635 is mounted on the screening box 51, with hanging rails 5635 installed on both sides of the screening box 51. A pulley 5632 is slidably mounted on each hanging rail 5635, moving along the rail. The pulley 5632 is rotatably mounted on the mounting base 5633 via a shaft. The two ends of the cleaning brush 5631 are rotatably mounted on the two mounting bases 5633 via shafts, and the cleaning brush 5631 is located at the bottom of the screening box 51. The hanging rail 5635 is provided with a rolling groove, and the pulley 5632 is located in the rolling groove. A limiting member 38 is provided in the rolling groove. The limiting member 38 can be installed at the bottom of the rolling groove or on the side wall of the rolling groove. The limiting member 38 is used to limit the movement of the pulley 5632. When the lateral thrust of the pulley 5632 exceeds a predetermined value, the pulley 5632 squeezes the limiting member 38 and deforms it. The pulley 5632 can squeeze the limiting member 38 to reduce the height of the limiting member 38, so that the pulley 5632 can pass through the limiting member 38. The limiting member 38 is a positioning bead, which is convenient for installation and saves costs. The limiting member 38 can keep the cleaning brush 5631 aligned with the screening box 51 during the screening of crushed stone and prevent displacement, thereby avoiding the cleaning brush 5631 from entering below the screen hole 522 and blocking the screen hole 522. The transmission rod 5636 is mounted on the mounting base 5633 and is used to connect with the drive plate 5626 of the transmission mechanism 562. Specifically, the drive plate 5626 is provided with a drive hole 56261, which is strip-shaped. When the transmission rod 5636 is inserted into the drive hole 56261, it can drive the transmission rod 5636 to move, thereby allowing the pulley 5632 on the mounting base 5633 to slide on the hanging rail 5635. The shaft of the cleaning brush 5631 is also equipped with a gear 5634, and the lower end face of the hanging rail 5635 is provided with teeth. The gear 5634 meshes with the teeth. In other embodiments, a rack can also be provided separately, so that the cleaning brush 5631 can automatically rotate when the mounting base 5633 drives the cleaning brush 5631 to move, allowing the cleaning brush 5631 to push out the gravel stuck on the screening box 51. The screening box 51 is provided with a shield, which is used to shield the pulley 5632, gear 5634, hanging rail 5635 and mounting base 5633 to reduce the impact of dust on the pulley 5632 and gear 5634. The shield is provided with an opening, which shields the cleaning component 563. At the same time, the transmission rod 5636 of the cleaning component 563 extends out of the opening to facilitate connection with the retraction drive 5625.

[0066] The cleaning brush 5631 has a push pin 56311, which is made of a hard metal such as steel. This ensures that the cleaning brush 5631 can insert into the sieve hole 522 and push out the stuck gravel when it rotates. It should be noted that the arrangement of the push pins 56311 is adapted to the spacing of the sieve hole 522, that is, when the cleaning brush 5631 rotates, the push pins 56311 can just be inserted into the sieve hole 522.

[0067] like Figure 24 As shown, the drive hole 56261 on the drive plate 5626 is formed by the downward indentation of the top surface of the drive plate 5626, which ensures that the transmission rod 5636 can be disengaged from the screening box 51 in the vertical direction, thereby allowing the screening box 51 to be disengaged from the drive plate 5626 when weighing. That is, the drive plate 5626 will not affect the weighing of the screening box 51, and at the same time, it can also ensure that the transmission rod 5636 can be driven to move when needed.

[0068] During the test, the truss 30 moves the gripping device 3 to the position where the rock model 41 is placed and grips the rock model 41. At the same time, the top door actuator 25 opens the top box door 223. Then, the truss 30 moves the gripping device 3 to place the rock model 41 on the test support plate 21, and the gripping device 3 releases the rock model 41. The truss 30 continues to move the gripping device 3 to the position where the steel ring 42 is placed. The gripping device 3 grips the steel ring 42, and the truss 30 moves the gripping device 3 to place the steel ring 42 and the rock model 41 concentrically on the test support plate. At the same time, a blast hole is drilled for the rock model 41. After completion, the truss 30 moves the gripping device 3 out of the protective box 22, and the top door actuator 25 closes the top box door 223. If the test requires that the steel ring 42 is not placed, the blast hole is drilled when the rock model 41 is placed. After the blast hole is completed, the gripping device 3 moves out of the protective box 22 under the action of the truss 30, and then the top box door 223 is closed. Afterwards, the explosives are manually placed into the borehole, or the explosives can be placed into the borehole using the grabbing device 3. Then, the borehole plug is placed into the borehole. Once the placement is complete, the blasting test can begin.

[0069] After the blasting is completed, the top door actuator 25 opens the top box door 223, and the truss 30 moves the grabbing device 3 to remove the steel ring 42. Then, the front door actuator 24 opens the front box door 221. If the steel ring 42 is not placed, the front box door 221 is opened directly. After the front box door 221 is opened, the lifting actuator 23 lifts the test bearing plate 21 and tilts the test bearing plate 21. The crushed stone is introduced into the screening box 51 through the guide chute 43. Then, the reciprocating motor 541 starts, which drives the drive wheel 542 to rotate. The rotation of the drive wheel 542 drives the connecting rod 543 to rotate. In this way, the connecting rod 543 drives the bottom box 52 to move back and forth. The reciprocating movement of the bottom box 52 drives the screening box 51 to move back and forth to screen the crushed stone. During the screening process, due to the restriction of the limiting member 38, the cleaning component 563 moves back and forth synchronously with the screening box 51. At the same time, the cleaning component 563 drives the drive plate 5626 to move back and forth. The drive plate 5626 drives the retraction driver 5625, the connecting seat 5622 and the slide 56242 to move back and forth. The connecting seat 5622 drives the second shaft 56212 to move back and forth along the first shaft 56211. After screening, the weighing device 53 weighs the samples. Then, the traction motor 552 starts, lifting the first screening box 51 and suspending it in the air for another weighing and recording. After weighing, the traction motor 552 continues to pull, lifting the second screening box 51 in the air for another weighing and recording. This process is repeated until all screening boxes 51 and bottom boxes 52 are weighed, completing the weighing of all types of crushed stone. After weighing, the traction motor 552 flips to release the traction rope 551, allowing all the screening boxes 51 to overlap. Then, the power drive 561 starts, driving the first shaft 56211 to rotate. The first shaft 56211 drives the second shaft 56212 to rotate, and the rotation of the second shaft 56212 causes the connecting seat 5622 to move axially. The connecting seat 5622 drives the retraction drive 5625 and the drive plate 5626. The drive plate 5626 moves, causing the cleaning brush 5631 to move along the screening box 51. This allows the ejector pins 56311 on the screening box 51 to push out the gravel stuck in the screen holes 522, ensuring that the gravel is not stuck in the screen holes 522. This allows all the gravel to be poured out during subsequent pouring without the need to manually remove any stuck gravel. It should be noted that when pouring the gravel out of the screening box 51, the screening box 51 needs to be disconnected from the flexible connector 515 or the traction rope 551. When it is necessary to push out the screening box 51 and the bottom box 52, the retraction actuator 5625 retracts the drive plate 5626, that is, moves the drive plate 5626 away from the screening box 51, causing the transmission rod 5636 to exit the drive plate 5626. Then, the connecting rod 543 is removed from the connecting groove 5211, and the bottom box 52 and screening box 51 can be moved.

[0070] Mechanical feeding is convenient and fast, improving feeding efficiency; automatic discharge of crushed stone eliminates the need for manual collection, resulting in high collection efficiency; screening and weighing can be completed on the same equipment without the need for transfer, making operation simple and convenient; at the same time, the cleaning device 56 can remove the crushed stone stuck in the screening box 51, and each cleaning can clean the entire column without the need for manual cleaning one by one, improving cleaning efficiency; thus shortening the test time.

[0071] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structures made using the contents of the present invention specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of the present invention.

Claims

1. A blasting model testing device, characterized in that: The device includes a test frame, a test support plate, a protective box, a lifting driver, a guide trough, and a screening device. The connecting end of the test support plate is rotatably mounted on the test frame. The output end of the lifting driver is connected to the test support plate and is mounted on the test frame. The protective box is placed on the test frame and covers the test support plate. The protective box has a front door and a top door. The connecting end of the front door to the test support plate is located on one side of the protective box. The screening device is arranged on the test frame on the side of the front door and is used to receive and screen the crushed stone. The guide trough is mounted on the test frame to guide the blasted crushed stone into the screening device. The guide trough includes a fixed trough body, a movable trough body, and a telescopic driver. The fixed trough body is fixed on the test frame, the movable trough body is slidably mounted on the fixed trough body, and the telescopic driver is mounted on the fixed trough body. The output end of the telescopic driver is connected to the movable trough body. It also includes a truss and a gripping device for gripping rock models. The gripping device includes a floating seat, a mounting plate, a gripping motor, a drilling motor, a drill rod, a transmission assembly, grippers, a transverse slide rail, and a positioning rod. The floating seat is mounted on the truss, the mounting plate is mounted on the floating seat, the gripping motor is mounted on the mounting plate, the transmission assembly is mounted on the mounting plate, the gripping motor is connected to the transmission assembly, and the gripping motor drives the transmission assembly. The transverse slide rail is mounted on the mounting plate, the grippers slide on the corresponding transverse slide rail, the transmission assembly is connected to the grippers, the positioning rod is mounted on the mounting plate, the drilling motor is mounted on the floating seat, the drill rod is connected to the drilling motor, and the drill rod passes through the transmission assembly. During the test, the truss drives the grabbing device to move to the position where the rock model is placed and grabs the rock model. The top box door is opened, and the truss drives the grabbing device to move and place the rock model on the test support plate. When the rock model is placed, a blast hole is drilled. Explosives are placed into the blast hole manually or using the grabbing device. After placement, the blasting test begins. After the blasting is completed, the front box door is opened, and the lifting drive lifts the test support plate, causing the test support plate to tilt. The crushed stone is introduced into the screening box through the guide chute.

2. The blasting model test apparatus as described in claim 1, characterized in that: The screening device includes a screen for classifying and screening gravel of different sizes, a weighing device, a reciprocating drive mechanism for driving the screen to move back and forth, a traction mechanism for pulling the screen, a cleaning device for clearing gravel stuck in the screen, and a mounting frame for mounting the traction mechanism. The traction mechanism is connected to the screen, and the reciprocating drive mechanism is connected to the screen. The screen includes a base box and multiple screening boxes with different screen hole sizes. The multiple screening boxes are stacked sequentially on the base box, and the screen holes of the screening boxes gradually decrease from top to bottom. The adjacent screening boxes are also connected by flexible connectors.

3. The blasting model test apparatus as described in claim 2, characterized in that: The cleaning device includes a power drive, a transmission mechanism, and a cleaning assembly. The power drive is connected to the transmission mechanism, which has a drive plate with a drive hole. The cleaning assembly includes a cleaning brush, pulleys, mounting bases, gears, and hanging rails. The hanging rails are mounted on the screening box, with hanging rails installed on both sides of the screening box. A pulley is slidably mounted on each hanging rail and rotatably mounted on the mounting base. The two ends of the cleaning brush are rotatably mounted on the two mounting bases via shafts. The hanging rails are provided with limiting members for restricting the pulleys. A transmission rod is mounted on each mounting base and connected to the drive plate. A gear is also mounted on the shaft of the cleaning brush, and the lower end face of the hanging rail is provided with teeth that mesh with the gears.

4. The blasting model test apparatus as described in claim 3, characterized in that: The transmission mechanism includes a telescopic transmission shaft, a connecting seat, a guide assembly, a sliding assembly, a retraction driver, and a drive plate. One end of the telescopic transmission shaft is connected to the power driver, and the other end of the telescopic transmission shaft is connected to the sliding assembly. The connecting seat is screwed onto the telescopic transmission shaft. The guide assembly is mounted on the mounting bracket, and the connecting seat is connected to the guide assembly. The retraction driver is mounted on the connecting seat, and the drive plate is mounted on the retraction driver. The connecting seat is connected to the cleaning assembly.

5. The blasting model test apparatus as described in claim 3, characterized in that: The drive plate is provided with a drive hole, and the transmission rod is inserted into the drive hole. The drive hole on the drive plate is formed by the top surface of the drive plate being recessed downwards.

6. The blasting model test apparatus as described in claim 2, characterized in that: The weighing device is used to weigh the screening box and the bottom box. The traction mechanism includes a traction rope, a traction motor and a winding wheel. The winding wheel is mounted on the output shaft of the traction motor. One end of the traction rope is fixed to the winding wheel, and the other end of the traction rope is connected to the screening box.

7. The blasting model test apparatus as described in claim 2, characterized in that: The reciprocating drive mechanism includes a reciprocating motor, a drive wheel, and a connecting rod. One end of the connecting rod is eccentrically mounted on the drive wheel. The base box is also provided with two connecting plates, each with a connecting groove. The other end of the connecting rod is T-shaped and is engaged in the connecting groove of the base box.

8. The blasting model test apparatus as described in claim 1, characterized in that: The transmission assembly includes an output gear, a transmission gear, a transmission sleeve, a lifting nut, and a connecting rod. The output gear is mounted on the output shaft of the gripping motor, the transmission gear is mounted on the transmission sleeve, and the output gear meshes with the transmission gear. The transmission sleeve is rotatably mounted on the mounting plate via a bearing and has an external thread. The lifting nut is screwed onto the transmission sleeve, one end of the connecting rod is pivotally connected to the lifting nut, and the other end of the connecting rod is pivotally connected to the gripper.

9. The blasting model test apparatus as described in claim 1, characterized in that: The floating seat includes an upper connecting plate, a movable seat, a connecting block, a lower connecting plate, a first floating rod, a second floating rod, a third floating rod, a first spring, a second spring, and a third spring. The upper connecting plate is mounted on the truss. Both ends of the first floating rod are respectively mounted on the upper connecting plate. The movable seat is slidably mounted on the first floating rod. The first spring is sleeved on the first floating rod. First springs are provided on both sides of the movable seat. A second floating rod is provided on the movable seat. The connecting block is slidably mounted on the second floating rod. The second spring is sleeved on the second floating rod. The lower connecting plate is mounted on the connecting block. The upper end of the third floating rod is slidably mounted on the lower connecting plate. An anti-loosening nut is installed on the upper end of the third floating rod located on the lower connecting plate. The lower end of the third floating rod is fixed on the mounting plate. The third spring is sleeved on the third floating rod.

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