Blasting model test device

Abstract

The invention discloses a blasting model test device. The blasting model test device comprises a test rack, a test bearing plate, a protection box, a jacking driver, a guide groove and a screening device, the connecting end of the test bearing plate is rotationally installed on the test rack, the jacking driver is installed on the test rack, the protection box is arranged on the test rack and covers the test bearing plate, a front box door and a top box door are arranged on the protection box, and the top box door is arranged on the top box door. The screening device is used for receiving and screening broken stones, the guide chute is installed on the test rack and used for guiding the broken stones after blasting to enter the screening device, the guide chute comprises a fixed chute body, a movable chute body and a telescopic driver, the fixed chute body is fixed on the test rack, the movable chute body is arranged on the fixed chute body in a sliding mode, and the telescopic driver is installed on the fixed chute body; and the output end of the telescopic driver is connected with the movable groove body. According to the blasting model test device, gravel can be guided into the screening device and can be classified and weighed, and the test time is shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blasting test, in particular to a blasting model test device. BACKGROUND

[0002] When studying the influence of boundary constraint conditions on the rock blasting crushing effect, the crushed stones after blasting the rock model need to be collected, and then classified according to different particle sizes, so as to judge the blasting effect according to the distribution of the crushed stones. When collecting the crushed stones, the tester usually manually collects the crushed stones in the protective box. This method has low collection efficiency. After the collection is completed, the crushed stones are screened by using a screening box with different sizes of screen holes. Different particle sizes need to be screened by using different screening boxes. The screening box needs to be operated multiple times for screening. After the screening is completed, the crushed stones on each screening box are weighed. The screening and weighing need to be performed on different devices, and the operation is complex. The manual screening is slow, and the screening box may be stuck with the crushed stones, affecting the screening efficiency. SUMMARY

[0003] The present application aims to provide a blasting model test device capable of automatically guiding the crushed stones into a screening device.

[0004] To solve the above problems, the present application provides a blasting model test device, which comprises a test frame, a test bearing plate, a protective box, a jacking drive, a material guiding groove and a screening device. The connecting end of the test bearing plate is rotatably installed on the test frame. The jacking drive is installed on the test frame. The protective box is placed on the test frame, and the protective box covers the test bearing plate. The protective box is provided with a front box door and a top box door. The front box door and the connecting end of the test bearing plate are located on the same side of the protective box. The screening device is arranged on one side of the test frame located in front of the box door. The screening device is used for receiving and screening the crushed stones. The material guiding groove is installed on the test frame for guiding the crushed stones after blasting into the screening device. The material guiding groove comprises a fixed groove body, a movable groove body and an extension drive. The fixed groove body is fixed on the test frame. The movable groove body is slidably arranged on the fixed groove body. The extension drive is installed on the fixed groove body. The output end of the extension drive is connected with the movable groove body.

[0005] Further, the screening device comprises a sifter for classifying the gravel of different sizes, a scale for weighing, a reciprocating driving mechanism for driving the sifter to reciprocate, a traction mechanism for pulling the sifter, a cleaning device for cleaning the gravel stuck in the sifter, and a mounting rack for mounting the traction mechanism, the traction mechanism being connected with the sifter, and the reciprocating driving mechanism being connected with the sifter.

[0006] Further, the cleaning device comprises a power driver, a transmission mechanism, and a cleaning assembly, the power driver being connected with the transmission mechanism, the transmission mechanism having a driving plate, the driving plate being provided with a driving hole, the cleaning assembly comprising a cleaning brush, a pulley, a mounting seat, a gear, and a hanging rail, the hanging rail being mounted on the sifting box, the sifting box being provided with the hanging rail on both sides, the pulley being slidably arranged on each hanging rail, the pulley being rotatably arranged on the mounting seat, the cleaning brush being rotatably arranged on the two mounting seats through shaft rods, the hanging rail being provided with a limiting piece for limiting the pulley, the transmission rod being arranged on each mounting seat and connected with the driving plate, the gear being arranged on the shaft rod of the cleaning brush, and the lower end surface of the hanging rail being provided with a tooth portion, the gear being engaged with the tooth portion.

[0007] Further, the transmission mechanism comprises a telescopic transmission shaft, a connecting seat, a guide assembly, a sliding assembly, a retreat driver, and a driving plate, one end of the telescopic transmission shaft being connected with the power driver, the other end of the telescopic transmission shaft being connected with the sliding assembly, the connecting seat being screwedly arranged on the telescopic transmission shaft, the guide assembly being arranged on the mounting rack, the connecting seat being connected with the guide assembly, the retreat driver being arranged on the connecting seat, the driving plate being arranged on the retreat driver, and the connecting seat being connected with the cleaning assembly.

[0008] Further, the driving plate is provided with a driving hole, the transmission rod being inserted into the driving hole, and the driving hole of the driving plate being formed by the top surface of the driving plate being recessed downward.

[0009] Further, the screening device further comprises a scale, the scale being used for weighing the sifting box and the bottom box, the traction mechanism comprising a traction rope, a traction motor, and a winding wheel, the winding wheel being arranged on the output shaft of the traction motor, one end of the traction rope being fixed on the winding wheel, and the other end of the traction rope being connected with the sifting box.

[0010] Further, the screening device further comprises a reciprocating driving mechanism, the reciprocating driving mechanism comprises a reciprocating motor, a driving wheel and a connecting rod, one end of the connecting rod is eccentrically rotatably installed on the driving wheel, the bottom box is further provided with a connecting plate, the connecting plate is two, the two connecting plates are both provided with a connecting groove, the other end of the connecting rod is T-shaped, and the other end of the connecting rod is clamped in the connecting groove of the bottom box.

[0011] Further, the device further comprises a grabbing device for grabbing the rock model, the grabbing device comprises a truss, a floating seat, a mounting plate, a grabbing motor, a drilling motor, a drill rod, a transmission assembly, a clamping jaw, a transverse sliding rail, a limiting piece and a positioning rod, the floating seat is installed on the truss, the mounting plate is installed on the floating seat, the grabbing motor is installed on the mounting plate, the transmission assembly is installed on the mounting plate, the grabbing motor is connected with the transmission assembly, the grabbing motor drives the transmission assembly, the transverse sliding rail is installed on the mounting plate, the clamping jaw is slidably arranged on the corresponding transverse sliding rail, the transmission assembly is connected with the clamping jaw, the positioning rod is installed on the mounting plate, the drilling motor is installed on the floating seat, the drill rod is connected with the drilling motor, and the drill rod is arranged on the transmission assembly.

[0012] Further, the transmission assembly comprises an output gear, a transmission gear, a transmission sleeve, a lifting nut and a connecting rod, the output gear is installed on the output shaft of the grabbing motor, the transmission gear is installed on the transmission sleeve, the output gear is engaged with the transmission gear, the transmission sleeve is rotatably installed on the mounting plate through a bearing, the transmission sleeve is provided with external threads, the lifting nut is screwed on the transmission sleeve, one end of the connecting rod is pivoted to the lifting nut, and the other end of the connecting rod is pivoted to the clamping jaw.

[0013] Further, the floating seat comprises 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 installed on the truss, the first floating rod is installed at two ends of the upper connecting plate respectively, the movable seat is slidably installed on the first floating rod, the first spring is sleeved on the first floating rod, the movable seat is provided with the first spring on both sides, the movable seat is provided with the second floating rod, the connecting block is slidably arranged on the second floating rod, the second spring is sleeved on the second floating rod, the lower connecting plate is installed on the connecting block, the upper end of the third floating rod is slidably arranged on the lower connecting plate, a anti-loosening nut is installed on the upper end of the third floating rod on the lower connecting plate, the lower end of the third floating rod is fixed on the mounting plate, and the third spring is sleeved on the third floating rod.

[0014] The blasting model test device opens the front box door after the blasting test is completed, the jacking driver jacks up the test bearing plate again, the test bearing plate is inclined, and the broken stones scattered on the test bearing plate are discharged to the material guide groove, the material guide groove guides the broken stones into the screening device for mechanical screening, manual collection is not needed, the collection efficiency is improved, meanwhile, the mechanical screening further improves the screening efficiency, and the whole test time is shortened. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of a preferred embodiment of the automatic feeding blasting model test device.

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

[0017] Figure 3 is a structural schematic view of the inside of the protective box.

[0018] Figure 4 is Figure 2 is a partial enlarged view of A in FIG.

[0019] Figure 5 is a structural schematic view of the bearing flat plate.

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

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

[0022] Figure 8 is a structural schematic view of the grabbing device.

[0023] Figure 9 is a front view of the grabbing device.

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

[0025] Figure 11 is a structural schematic view of the transmission assembly.

[0026] Figure 12 is a structural schematic view of the clamping jaw when the steel ring is placed.

[0027] Figure 13 is a structural schematic view of the material guide groove.

[0028] Figure 14 is a structural schematic view of the movable groove body and the fixed groove body.

[0029] Figure 15 is a sectional view of the movable groove body.

[0030] Figure 16is a structural schematic view of the screening device.

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

[0032] Figure 18 is Figure 16 is a partial enlarged view of B in FIG. 1.

[0033] Figure 19 is a structural schematic view of the bottom box.

[0034] Figure 20 is a structural schematic view of the transmission assembly.

[0035] Figure 21 is a structural schematic view of the telescopic transmission shaft.

[0036] Figure 22 is Figure 16 is a partial enlarged view of C in FIG. 1.

[0037] Figure 23 is a structural schematic view of the cleaning assembly.

[0038] Figure 24 is a structural schematic view of the driving plate.

[0039] The meanings of the various reference signs in the drawings are as follows: Test rack 1, rack body 11, bearing plate 12, support plate 13, shaft connecting plate 14, test bearing plate 21, driving connecting plate 211, protection box 22, front box door 221, positioning notch 222, top box door 223, jacking driver 23, front door driver 24, top door driver 25, support 26, support rod 27, grabbing 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 3153, first spring 3161, second spring 3162, third spring 3163, mounting plate 32, grabbing 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, clamping jaw 36, non-slip pad 361, transverse sliding rail 37, limiting piece 38, positioning rod 39, rolling piece 391, rock model 41, steel ring 42, material guide groove 43, fixed groove body 431, movable groove body 432, hanging groove 4321, screening device 5, screening box 51, hook 511, positioning column 512, positioning plate 513, positioning hole 5131, walking wheel 514, flexible connecting piece 515, bottom box 52, connecting plate 521, connecting groove 5211, screen hole 522, weight scale 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 driver 561, transmission mechanism 562, telescopic transmission shaft 5621, first shaft rod 56211, second shaft rod 56212, spline 56213, connecting seat 5622, guide assembly 5623, guide seat 56231, guide rod 56232, sliding assembly 5624, transmission sliding rail 56241, sliding seat 56242, retreat driver 5625, driving plate 5626, driving hole 56261, cleaning assembly 563, cleaning brush 5631, thimble 56311, pulley 5632, mounting seat 5633, gear 5634, suspension rail 5635, transmission rod 5636, mounting rack 57. DETAILED DESCRIPTION

[0040] The application will be further described below in conjunction with the drawings.

[0041] As Figure 1As shown, the preferred embodiment of the blasting model test device of the present application comprises a test frame 1, a test bearing plate 21, a protective box 22, a jacking driver 23 and a grabbing device 3. The connecting end of the test bearing plate 21 is rotatably mounted on the test frame 1, and the test bearing plate 21 is used to bear the blasting rock model 41 and collect the blasted rock debris at the same time. The jacking driver 23 is mounted on the test frame 1, and the jacking driver 23 is used to jack up the test bearing plate 21 so that the test bearing plate 21 is in an inclined state to dump the rock debris on the test bearing plate 21. The jacking driver 23 usually adopts a pneumatic cylinder, but in other embodiments, a hydraulic cylinder or an electric cylinder can also be used as a lifting device. The protective box 22 is placed on the test frame 1, and the protective box 22 covers the test bearing plate 21. The protective box 22 is used to limit the position of the rock debris scattered during blasting to ensure that all the rock debris will fall on the test bearing plate 21. The front box door 221 is provided on the protective box 22, and the connecting end of the test bearing plate 21 is located on the same side of the protective box 22. The bottom surface of the front box door 221 is lower than the top surface of the test bearing plate 21, so as to ensure that all the rock debris can fall from the test bearing plate 21. The grabbing device 3 is used to place the rock model 41 and the steel ring 42 on the test bearing plate 21 and drill holes in the rock model 41. The screening device 5 is arranged on one side of the test frame 1, and the screening device 5 is arranged on the same side as the front box door 221. The screening device 5 is used to screen the rock debris, and the screened rock debris is classified according to the particle size and weighed. The test frame 1 is provided with a material guide groove 43 for guiding the rock debris into the screening device 5.

[0042] As Figures 2 to 7 shown, the test frame 1 comprises a frame body 11, a bearing flat plate 12 and a support plate 13, and the bearing flat plate 12 and the support plate 13 are both mounted on the frame body 11. The support plate 13 is located below the bearing flat plate 12, and the lower end of the jacking driver 23 is pivoted to the support plate 13. The bearing flat plate 12 is used to place articles, and the bearing flat plate 12 is provided with a relief gap, and the test bearing plate 21 is located in the relief gap. The output end of the jacking driver 23 penetrates the frame body 11 and is connected with the test bearing plate 21. The test bearing plate 21 is provided with a driving connection plate 211, which is used to connect with the jacking driver 23. The jacking driver 23 is connected with a connecting shaft connected with the driving connection plate 211, that is, the connecting shaft on the jacking driver 23 is rotatably arranged on the driving connection plate 211.

[0043] The connecting end of the test bearing plate 21 is provided with an arc surface to ensure smooth rotation of the connecting end during rotation and to prevent interference with the test frame 1.

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

[0045] The protective box 22 is provided with a positioning notch 222 which faces downward and is used to cooperate with the rotating shaft connecting plate 14 to fix the protective box 22 and avoid movement of the protective box 22. The protective box 22 is provided with a front door driver 24 which is pivotally connected to the protective box 22, and an output end of the front door driver 24 is pivotally connected to the front box door 221. The front door driver 24 usually adopts a pneumatic cylinder, and can also adopt a hydraulic cylinder or an electric cylinder. When the front door driver 24 is extended, the front box door 221 is closed, and when the front door driver 24 is retracted, the front box door 221 is opened and can be operated by being inserted into the protective box 22. The protective box 22 is also provided with a top box door 223 which is slidingly arranged on the protective box 22. The top box door 223 is slid outward of the protective box 22 to open the protective box 22, and the top box door 223 is opened to allow the grabbing mechanism to be inserted into the protective box 22 to place the rock model 41 or the protective piece on the test bearing plate 21. The top plate of the protective box 22 is used as the top box door 223, and the protective box 22 is provided with a step on which the top box door 223 is slidingly arranged. The test frame 1 is provided with a top door driver 25 which is installed on the test frame 1 through a support 26. An output end of the top door driver 25 is provided with a support rod 27 which is fixed to the top box door 223. The top door driver 25 usually adopts a pneumatic cylinder, and can also adopt a hydraulic cylinder or an electric cylinder. When the top door driver 25 is extended, the top box door 223 is opened. When the top door driver 25 is retracted, the top box door 223 is closed.

[0046] When the rock fragments need to be collected, the front door driver 24 is extended to open the front box door 221, and then the jacking driver 23 jacks the rear end of the test bearing plate 21 to tilt the test bearing plate 21, so that the rock fragments are poured out and fall into the screening device 5. After completion, the jacking driver 23 is reset to reset the test bearing plate 21, facilitating use in the next test. The rock fragments can be quickly collected, and the operation is convenient and fast without manual collection.

[0047] As Figures 8 to 10As shown, the grabbing device 3 comprises a truss 30, a floating seat 31, a mounting plate 32, a grabbing motor 331, a transmission assembly 34, a drilling motor 332, a drill rod 35, a clamping jaw 36, a transverse sliding rail 37, a limiting piece 38 and a positioning rod 39. The truss 30 can move in the lateral, longitudinal and vertical directions. The truss 30 is a conventional device, and its working principle and structure are not described here. The floating seat 31 is installed on the truss 30, and the mounting plate 32 is installed on the floating seat 31. The mounting plate 32 can float in the lateral, longitudinal and vertical directions by means of the floating seat 31. The grabbing motor 331 is installed on the mounting plate 32 and located on the top surface of the mounting plate 32. The mounting plate 32 is provided with a mounting hole, and the transmission assembly 34 is installed in the mounting hole of the mounting plate 32. The grabbing motor 331 is connected with the transmission assembly 34, and the grabbing motor 331 drives the transmission assembly 34. The transverse sliding rail 37 is installed on the mounting plate 32. There are two transverse sliding rails 37, which are symmetrically arranged. The transverse sliding rails 37 are located on the bottom surface of the mounting seat 332. There are two clamping jaws 36, which are respectively and slidably arranged on the corresponding transverse sliding rails 37. The transmission assembly 34 is connected with the two clamping jaws 36, and the transmission assembly 34 drives the two clamping jaws 36 to move towards or away from each other, so as to realize the grabbing or releasing of the articles. There are two positioning rods 39, which are both installed on the mounting seat 332 and are symmetrically arranged. The positioning rods 39 are used to cooperate with the rock model 41 placed on the test bearing plate 21, and the position of the mounting seat 332 is positioned by the positioning rods 39, so as to ensure that the clamped steel ring 42 is concentrically placed with the rock model 41. The drilling motor 332 is installed on the floating seat 31, the drill rod 35 is inserted into the transmission assembly 34, and the lower end of the drill rod 35 protrudes out of the transmission assembly 34. The drilling motor 332 drives the drill rod 35 to rotate, and the drill rod 35 rotates to drill a hole at the center position of the rock model 41, so as to form a blast hole on the rock model 41. The limiting piece 38 is installed on the mounting seat 332 and located on the top surface of the mounting seat 332. The limiting piece 38 is used to limit the minimum distance between the mounting seat 332 and the floating seat 31 in the vertical direction, so as to ensure the safety of the grabbing motor 331 and the drilling motor 332, which will not be squeezed by the floating seat 31 and the mounting seat 332. The end of the lower end of the limiting piece 38 is lower than the end of the lower end of the clamping jaw 36, so that the limiting piece 38 will contact the rock model 41 before the clamping jaw 36. It can be ensured that the steel ring 42 is positioned before contacting the test bearing plate 21 each time, and the steel ring 42 will not slide on the test bearing plate 21, which will not damage the steel ring 42 or the test bearing plate 21.The end of the lower end of the drill pipe 35 is higher than the end of the lower end of the clamp jaw 36, so as to ensure that the drill pipe 35 does not contact the rock model 41 when there is no need to drill.

[0048] The floating seat 31 comprises upper connecting plates 311, movable seats 312, connecting blocks 313, lower connecting plates 314, first floating rods 3151, second floating rods 3152, third floating rods 3153, first springs 3161, second springs 3162, and third springs 3163. The upper connecting plates 311 are two, which are connected with the truss 30, i.e. the upper connecting plates 311 are installed on the truss 30, and the two ends of the first floating rod 3151 are respectively installed on the upper connecting plates 311. The movable seat 312 is installed on the first floating rod 3151, and is located between the two upper connecting plates 311. Of course, in other embodiments, the upper connecting plates 311 can also be a U-shaped plate. The first spring 3161 is sleeved on the first floating rod 3151, and the two sides of the movable seat 312 are provided with the first spring 3161, and the two ends of the first spring 3161 respectively abut against the movable seat 312 and the upper connecting plate 311, so that the movable seat 312 can be reset by the first spring 3161 when it moves in the transverse direction. The second floating rod 3152 is arranged on the movable seat 312, the connecting block 313 is slidingly arranged on the second floating rod 3152, and the connecting block 313 can slide on the second floating rod 3152. The second spring 3162 is sleeved on the second floating rod 3152, and the two sides of the connecting block 313 are provided with the second spring 3162, and the two ends of the second spring 3162 respectively abut against the movable seat 312 and the connecting block 313, so that the connecting block 313 can be reset by the second spring 3162 when it slides on the second floating rod 3152. The lower connecting plate 314 is installed on the connecting block 313, the upper end of the third floating rod 3153 is slidingly arranged on the lower connecting plate 314, a nut is arranged 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 seat 332, so that the mounting seat 332 can float in the vertical direction, and the mounting seat 332 can be automatically reset by gravity; and the drilling motor 332 is installed on the bottom surface of the lower connecting plate 314. The third spring 3163 is sleeved on the third floating rod 3153, and is used for slowing down the speed of the distance reduction between the mounting seat 332 and the lower connecting plate 314, so that the drill pipe 35 can slowly contact the rock model 41, and the rock model 41 is avoided from being hit hard, thereby protecting the drill pipe 35 from being damaged by impact.

[0049] As Figure 11As shown, the transmission assembly 34 comprises 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 installed on the output shaft of the grabbing motor 331, the transmission gear 342 is installed on the transmission sleeve 343, the output gear 341 is engaged with the transmission gear 342, and the output gear 341 and the transmission gear 342 are both bevel gears 5634, so that the grabbing motor 331 can be arranged on one side of the transmission sleeve 343, and thus the drilling motor 332 can be installed above the transmission sleeve 343. The transmission sleeve 343 is rotatably installed on the mounting seat 332 by a bearing, the transmission gear 342 drives the transmission sleeve 343 to rotate, the center of the transmission sleeve 343 is provided with a through hole, the through hole is used for penetrating the drill rod 35, that is, the drill rod 35 penetrates in the through hole, so that the lower end of the drill rod 35 can be located below the mounting seat 332, facilitating drilling. The transmission sleeve 343 is provided with external threads, the lifting nut 344 is screwed on the transmission sleeve 343, and the transmission sleeve 343 drives the lifting nut 344 to move up and down. One end of the linkage rod 345 is pivoted to the lifting nut 344, and the other end of the linkage rod 345 is pivoted to the clamping jaw 36. Each clamping jaw 36 is connected with at least one linkage rod 345, and the lifting nut 344 moves up and down to drive the two clamping jaws 36 to move towards or away from each other through the linkage rod 345.

[0050] As Figure 12As shown, when the rock model 41 or the steel ring 42 needs to be grabbed, the truss 30 drives the grabbing mechanism to move to the position of the steel ring 42 or the rock model 41, then the grabbing 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 transmission sleeve 343 drives the lifting nut 344 to move upwards, the lifting nut 344 drives the linkage rod 345 to move, the linkage rod 345 drives the two clamping jaws 36 to move towards each other, so as to clamp the rock model 41 or the steel ring 42, and the grabbing is completed. Conversely, the steel ring 42 or the rock model 41 can be released. When the rock model 41 is grabbed, during the descending process of placing the steel ring 42, the limiting piece 38 first contacts the rock model 41, the limiting piece 38 is automatically corrected under the action of the floating seat 31, and the steel ring 42 is concentrically placed with the rock model 41. Since the clamping jaw 36 still clamps the steel ring 42 at this time, the mounting seat 332 will not move downwards, and due to the third spring 3163, the downward speed will be reduced, and the steel ring 42 will not impact the test bearing plate 21 with great force; after the steel ring 42 is placed, the truss 30 continues to drive the upper connecting plate 311 to move downwards, and at the same time, the drilling motor 332 starts to rotate, the drill rod 35 slowly contacts the rock model 41 to drill the rock model 41, and at the same time, after the drill rod 35 contacts the rock model 41, the grabbing motor 331 drives the clamping jaw 36 to release the steel ring 42, so as to avoid that the clamping jaw 36 limits the downward movement of the drill rod 35. During the whole process, the steel ring 42 and the rock model 41 do not need to be manually carried, and are mechanically clamped and placed, which saves time and effort. The blast hole of the rock model 41 can be machined during the process of placing the steel ring 42, and the efficiency is high.

[0051] The positioning rod 39 is provided with a rolling piece 391, which contacts the rock model 41, so that rolling friction can be realized, the rock model 41 can be effectively prevented from being damaged, and compared with the limiting piece 38 directly slidingly contacting the rock model 41, the service life of the limiting piece 38 is prolonged.

[0052] The clamping jaw 36 is provided with an antiskid pad 361, which is used for increasing the friction and improving the gripping force of the rock model 41 and the steel ring 42; and the antiskid pad 361 is usually made of rubber.

[0053] As Figures 13 to 15As shown, the material guide groove 43 comprises a fixed groove body 431, a movable groove body 432 and a telescopic drive, the fixed groove body 431 is fixed on the test frame 1, the movable groove body 432 is slidingly arranged on the fixed groove body 431, the telescopic drive is installed on the fixed groove body 431, and an output end of the telescopic drive is connected with the movable groove body 432. Specifically, a top end of the movable groove body 432 is bent to form a hanging groove 4321, the movable groove body 432 is hung on the fixed groove body 431 through the hanging groove 4321, so that the movable groove body 432 can slide on the fixed groove body 431. When the screening device 5 is weighed, the telescopic drive resets to drive the movable groove body 432 to move backward, and after the screening device 5 is weighed, the telescopic drive drives the movable groove body 432 to move forward, facilitating the next time to guide the gravel into the screening device 5.

[0054] As Figures 16 to 18As shown, the screening device 5 includes a sifter, a scale 53, a reciprocating drive mechanism 54, a traction mechanism 55, a cleaning device 56 and a mounting frame 57. The sifter classifies different sizes of gravel. The sifter includes a bottom box 52 and a plurality of screening boxes 51, which are sequentially overlapped on the bottom box 52, and the screening holes 522 of the plurality of screening boxes 51 are different in size, so that the screening boxes 51 can screen the gravel of corresponding size according to their own screening holes 522. The plurality of screening boxes 51 are sequentially overlapped on the bottom box 52, and the upper and lower adjacent screening boxes 51 are also connected by flexible connecting pieces 515, which ensure that the screening box 51 located above can pull the screening box 51 below. The screening holes 522 of the screening boxes 51 gradually decrease from top to bottom, which ensures that the screening boxes 51 can screen all categories of gravel. The length of the flexible connecting piece 515 is greater than the distance between the connection points of the adjacent two screening boxes 51, so that when the upper screening box 51 is moved upward and suspended, the lower screening box 51 is still overlapped on the screening box 51 or the bottom box 52, and the upper screening box 51 continues to move to drive the lower screening box 51 to move upward. The flexible connecting piece 515 can be a connecting rope or a connecting rope with O-shaped buckles tied at both ends. The bottom box 52 is used to receive the smallest particle size classified gravel, and the bottom box 52 is placed on the scale 53. The scale 53 weighs the weight of the objects on it, and the scale 53 can use a weighbridge or other weighing equipment. The bottom box 52 is located for easy movement, and the top surface of the scale 53 is usually arranged flush with the ground. The reciprocating drive mechanism 54 is connected with the bottom box 52, and the reciprocating drive mechanism 54 drives the bottom box 52 to reciprocate to form reciprocating movement, so that the bottom box 52 and the screening boxes 51 arranged on the bottom box 52 reciprocate, and the gravel in the screening boxes 51 can be screened by the screening boxes 51, achieving the purpose of screening gravel. The traction mechanism 55 is installed on the mounting frame 57, and the traction mechanism 55 is used to pull the uppermost screening box 51 to move upward, so that the number of screening boxes 51 and the gravel screened by the screening boxes 51 can be gradually reduced, and then the weight of the gravel in the corresponding size classification can be calculated by subtracting the weight of the screening boxes 51 after the number of screening boxes 51 is reduced from the total weight. The cleaning device 56 is installed on the mounting frame 57, and the cleaning device 56 is connected with all the screening boxes 51. The cleaning device 56 is used to remove the gravel stuck on the screening boxes 51, so that 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 reciprocate left and right, and the bottom box 52 drives the plurality of different screening boxes 51 to reciprocate left and right, so that the gravel can be classified and screened, and the screening of gravel of different sizes is completed.

[0055] In the first use, the scale 53 weighs the bottom box 52 and the screening box 51 to obtain their own weights, and 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 scale 53 weighs the total weight of the gravel and the bottom box 52 and the screening box 51, since the weight of the bottom box 52 and the screening box 51 is known, the total weight of the gravel can be obtained, the total weight of the gravel, the bottom box 52 and the screening box 51 is defined as c, and the total weight of the gravel is defined as d, then d = c - b - na, wherein n is the number of the screening boxes 51. The traction mechanism 55 drives the first screening box 51 from top to bottom to move a predetermined distance, at this time the flexible connecting piece 515 connected between the first screening box 51 and the second screening box 51 is not straightened, and then the scale 53 weighs to obtain the weight e, so the weight of the gravel in the first screening box 51 can be obtained by calculation, which is: the total weight c - the weight e - the weight a of a single screening box 51; then continue to pull upward to lift the second screening box 51 to be suspended, at the same time the flexible connecting piece 515 between the second screening box 51 and the third screening box 51 is not straightened, the scale 53 is weighed again to obtain the weight f, at this time the weight of the gravel in the second screening box 51 can be calculated, which is: the weight e - the weight f - the weight a of a single screening box 51; in turn, the weight of the gravel in each screening box 51 can be calculated. After lifting all the screening boxes 51, the scale 53 is weighed to obtain the weight g, and the weight of the gravel in the bottom box 52 is the weight g - the weight b of the bottom box 52, so the classified gravel can be weighed. Not only can the gravel be classified and weighed, but also the classified gravel can be weighed on the same device, without the need to transport between multiple devices, and the operation is convenient.

[0056] The screening box 51 is provided with a hook 511, which is used to be connected with the traction mechanism 55 or is used to be connected with the flexible connecting piece 515. In order to stably lift the screening box 51, two hooks 511 are arranged on each side of the screening box 51. In order to ensure that the screening box 51 will not fall off during reciprocating movement, the positioning column 512 and the positioning plate 513 are arranged on the screening box 51, the positioning plate 513 is located above the screening box 51, and the positioning column 512 is located below the screening box 51, the positioning plate 513 is provided with a positioning hole 5131, the positioning column 512 of the adjacent upper screening box 51 is inserted into the positioning hole 5131 of the lower screening box 51, so that the adjacent screening boxes 51 are fixed, and it can be ensured that the screening box 51 will not fall off during reciprocating movement. The positioning plate 513 and the positioning column 512 are four, two positioning plates 513 and positioning columns 512 are arranged on each side of the screening box 51, and in other embodiments, more or fewer positioning plates 513 and positioning columns 512 can also be arranged according to needs.

[0057] In combination Figure 19Referring to, in order to facilitate the reciprocating movement of the bottom box 52, walking wheels 514 are arranged on the bottom box 52, so that the bottom box 52 can be easily moved under the reciprocating drive mechanism 54, and the bottom box 52 can also be easily moved. The bottom box 52 is provided with a positioning plate 513, the positioning plate 513 is provided with a positioning hole 5131, the positioning hole 5131 is used for positioning the positioning column 512 on the screening box 51, and the screening box 51 can be ensured to be stably and synchronously reciprocated with the bottom box 52 and will not fall off. The bottom box 52 is also provided with a connecting plate 521, the connecting plate 521 is two, and the two connecting plates 521 are provided with connecting grooves 5211, and the connecting grooves 5211 are used for connecting the reciprocating drive mechanism 54.

[0058] As shown in Figure 16 The reciprocating drive mechanism 54 includes a reciprocating motor 541, a drive wheel 542 and a connecting rod 543. The drive wheel 542 is installed on the output shaft of the reciprocating motor 541. One end of the connecting rod 543 is eccentrically installed on the drive wheel 542. The other end of the connecting rod 543 is connected with the bottom box 52. Specifically, the other end of the connecting rod 543 is T-shaped, and the other end of the connecting rod 543 is clamped in the connecting groove 5211 of the bottom box 52. The connecting groove 5211 is recessed downward from the top of the connecting plate 521, so that the connecting rod 543 can be easily disassembled from the connecting groove 5211. The height of the connecting groove 5211 is greater than the diameter of the connecting rod 543, so 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 winding wheel 553. The traction motor 552 is installed on the mounting frame 57, and the traction motor 552 is used to provide power. The winding wheel 553 is installed on the output shaft of the traction motor 552, and the traction motor 552 drives the winding wheel 553 to rotate. One end of the traction rope 551 is fixed on the winding wheel 553, and the other end of the traction rope 551 is connected with the screening box 51. The winding wheel 553 is used to wind or release the traction rope 551, so as to change the height position of the screening box 51. The traction motor 552 is four, and each traction motor 552 corresponds to a winding wheel 553 and a traction rope 551. When the screening box 51 needs to be pulled up, the traction motor 552 rotates to drive the traction rope 551 to pull the screening box 51 up. In other embodiments, the traction mechanism 55 can also use a motorized sliding table to replace the traction motor 552 and the winding wheel 553. Of course, in order to save the traction motor 552, a single motor can be combined with a transmission chain wheel and a chain to drive two transmission shafts to rotate, and the two ends of the two transmission shafts are installed with winding wheels 553, so as to realize the reduction of the traction motor 552.

[0060] As Figure 16 and Figure 17 shown, the cleaning device 56 comprises a power driver 561 for providing power, an output end of the power driver 561 is connected with a transmission mechanism 562, the transmission mechanism 562 is connected with cleaning components 563, the transmission mechanism 562 is used for transmitting power to drive the cleaning components 563 to move along the length direction of the screening box 51, the cleaning components 563 are used for driving the stuck stones in the screening box 51. When the cleaning is needed, the power driver 561 drives the transmission mechanism 562, the transmission mechanism 562 drives all the cleaning components 563 to reciprocate on the corresponding screening box 51 to clean the stones stuck in the screening box 51.

[0061] In combination Figure 20 for reference, the transmission mechanism 562 comprises a telescopic transmission shaft 5621, a connecting seat 5622, a guide assembly 5623, a sliding assembly 5624, a retreat driver 5625 and a driving plate 5626. One end of the telescopic transmission shaft 5621 is connected with the power driver 561, the other end of the telescopic transmission shaft 5621 is connected with the sliding assembly 5624, the connecting seat 5622 is screwed on the telescopic transmission shaft 5621, the telescopic transmission shaft 5621 can be elongated and shortened to adapt to the reciprocating movement of the bottom box 52. The retreat driver 5625 is installed on the connecting seat 5622, the driving plate 5626 is installed on the retreat driver 5625, the retreat driver 5625 is used to drive the driving plate 5626 to move, so that the driving plate 5626 is separated from or connected with the cleaning components 563; the retreat driver 5625 adopts a pneumatic cylinder, of course, in other embodiments, it can also adopt a hydraulic cylinder or an electric cylinder and other power equipment. The power driver 561 drives the telescopic transmission shaft 5621 to rotate, the connecting seat 5622 moves along the axial direction of the telescopic transmission shaft 5621, the connecting seat 5622 drives the retreat driver 5625 and the driving plate 5626 to move, the driving plate 5626 drives the cleaning components 563 to move. The guide assembly 5623 is installed on the mounting frame 57, the connecting seat 5622 is connected with the guide assembly 5623, the guide assembly 5623 is used to guide the connecting seat 5622 to move stably.

[0062] As Figure 21As shown, the telescopic transmission shaft 5621 comprises a first shaft rod 56211 and a second shaft rod 56212, the first shaft rod 56211 is arranged in the second shaft rod 56212, the first shaft rod 56211 is provided with a first key groove, the first key groove is provided with a spline 56213, the second shaft rod 56212 is provided with a second key groove, and the spline 56213 on the first shaft rod 56211 cooperates with the second key groove. With this structure, the first shaft rod 56211 can drive the second shaft when rotating, and at the same time, the second shaft rod 56212 can move axially along the first shaft rod 56211. The first shaft rod 56211 is connected with the power driver 561, the power driver 561 drives the first shaft rod 56211, and the second shaft rod 56212 is connected with the sliding assembly 5624.

[0063] As shown in Figure 22 , the sliding assembly 5624 comprises a transmission slide rail 56241 and a sliding seat 56242, the transmission slide rail 56241 is installed on the mounting frame 57, the sliding seat 56242 is slidingly arranged on the transmission slide rail 56241, and the second shaft rod 56212 of the telescopic transmission shaft 5621 is installed on the sliding seat 56242 through a bearing. In this way, the sliding seat 56242 can support the second shaft rod 56212 to move axially on the first shaft rod 56211, that is, when the screening box 51 is reciprocally moved by the traction mechanism 55, the driving plate 5626 of the transmission mechanism 562 is driven to reciprocally move by the screening box 51, and the driving plate 5626 slides on the transmission slide rail 56241.

[0064] As shown in Figure 17 and Figure 20 , the guide assembly 5623 comprises a guide seat 56231 and a guide rod 56232, both ends of the guide rod 56232 are installed on two guide seats 56231, the guide rod 56232 is arranged in the connecting seat 5622, and the connecting seat 5622 can slide on the guide rod 56232.

[0065] As shown in 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 top pin 56311 made of hard metal such as steel, which ensures that the cleaning brush 5631 can be inserted into the sieve hole 522 to eject the jammed gravel when rotating. It should be noted that the arrangement of the top pin 56311 is adapted to the spacing of the sieve hole 522, that is, the top pin 56311 can be just inserted into the sieve hole 522 when the cleaning brush 5631 rotates.

[0067] As shown in Figure 24 The driving hole 56261 on the driving plate 5626 is formed by recessing downward from the top surface of the driving plate 5626, which ensures that the transmission rod 5636 can be separated from the sieve box 51 in the vertical direction, so that the sieve box 51 can be separated from the driving plate 5626 when weighing, that is, the driving plate 5626 will not affect the weighing of the sieve 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 drives the grabbing device 3 to move to the position where the rock model 41 is placed to grab the rock model 41, and the top door drive 25 opens the top box door 223. Then the truss 30 drives the grabbing device 3 to move and place the rock model 41 on the test bearing plate 21, and the grabbing device 3 releases the rock model 41. The truss 30 continues to drive the grabbing device 3 to move to the position where the steel ring 42 is placed, and the grabbing device 3 grabs the steel ring 42. The truss 30 drives the grabbing device 3 to place the steel ring 42 concentrically with the rock model 41 on the experimental bearing plate, and drills a blast hole for the rock model 41. After completion, the truss 30 drives the grabbing device 3 to move out of the protective box 22, and the top door drive 25 closes the top box door 223. If the test does not require the placement of the steel ring 42, the blast hole is drilled when the rock model 41 is placed, and the blast hole is completed. The grabbing device 3 moves out of the protective box 22 under the drive of the truss 30, and then the top box door 223 is closed. Then the explosive is placed into the blast hole manually, or the explosive is placed into the blast hole using the grabbing device 3, and then the blast hole plug is placed into the blast hole. After the placement is completed, the blasting test can be started.

[0069] After the blasting is completed, the top door driver 25 opens the top box door 223, the truss 30 drives the grabbing device 3 to move to take out the steel ring 42, and then the front door driver 24 opens the front box door 221. If the steel ring 42 is not placed, the front box door 221 is directly opened. After the front box door 221 is opened, the jacking driver 23 jacks up the test bearing plate 21, and the test bearing plate 21 is inclined. The gravel is introduced into the screening box 51 through the guide chute 43. Then the reciprocating motor 541 is started. The reciprocating motor 541 drives the driving wheel 542 to rotate. The driving wheel 542 drives the connecting rod 543 to rotate. The connecting rod 543 drives the bottom box 52 to reciprocate. The bottom box 52 drives the screening box 51 to reciprocate, so as to screen the gravel. During the screening process, the cleaning assembly 563 follows the screening box 51 to reciprocate synchronously due to the limitation of the limiting piece 38. The cleaning assembly 563 drives the driving plate 5626 to reciprocate. The driving plate 5626 drives the retreat driver 5625, the connecting seat 5622 and the sliding seat 56242 to reciprocate. The connecting seat 5622 drives the second shaft rod 56212 to reciprocate along the first shaft rod 56211. After the screening is completed, the weighing device 53 weighs. Then the traction motor 552 starts to pull the first screening box 51 above to be suspended. The weighing is recorded again. After the weighing is completed, the traction motor 552 continues to pull the second screening box 51 to be suspended. The weighing is recorded again. In this way, all the screening boxes 51 and the bottom box 52 are gradually weighed. After the weighing is completed, the traction motor 552 reverses to release the traction rope 551, so that all the screening boxes 51 are overlapped together. Then the power driver 561 is started. The power driver 561 drives the first shaft rod 56211 to rotate. The first shaft rod 56211 drives the second shaft rod 56212 to rotate. The second shaft rod 56212 drives the connecting seat 5622 to move axially. The connecting seat 5622 drives the retreat driver 5625 and the driving plate 5626 to move. The driving plate 5626 drives the cleaning brush 5631 to move along the screening box 51. In this way, the ejector pin 56311 on the screening box 51 ejects the gravel in the sieve hole 522, so that the gravel is not stuck in the sieve hole 522. In this way, all the gravel can be poured out in the subsequent pouring process without manually unblocking the stuck gravel. It should be understood that when the gravel in the screening box 51 is poured, the flexible connecting piece 515 or the traction rope 551 needs to be removed. When the screening box 51 and the bottom box 52 need to be pushed out, the retreat driver 5625 drives the driving plate 5626 to retreat, that is, the driving plate 5626 moves away from the screening box 51, so that the transmission rod 5636 exits the driving plate 5626. Then the connecting rod 543 is taken out of the connecting groove 5211, so that the bottom box 52 and the screening box 51 can be moved.

[0070] The mechanical feeding is convenient and fast, the feeding efficiency is improved, the broken stones are automatically discharged, manual collection of the broken stones is not needed, the collection efficiency of the broken stones is high, the screening and weighing can be completed on the same equipment, transfer is not needed, the operation is simple and convenient, meanwhile, the broken stones stuck in the screening box 51 can be cleaned through the cleaning device 56, the whole column can be cleaned each time, manual cleaning one by one is not needed, and the cleaning efficiency is improved, and the test time is shortened.

[0071] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and equivalent structures made by using the content of the specification and drawings of the present application, directly or indirectly applied in other related technical fields, are also within the patent protection scope of the present application.

Claims

1. A blasting model test apparatus, characterized by: The test frame, the test bearing plate, the protection box, the jacking driver, the material guide groove and the screening device, the connecting end of the test bearing plate is rotatably installed on the test frame, the jacking driver is installed on the test frame, the protection box is arranged on the test frame and covers the test bearing plate, the front box door and the top box door are arranged on the protection box, the front box door and the connecting end of the test bearing plate are located on the same side of the protection box, the screening device is arranged on one side of the test frame which is located on the side of the front box door, the screening device is used for receiving and screening the broken stones, the material guide groove is installed on the test frame and is used for guiding the broken stones after blasting into the screening device, the material guide groove comprises a fixed groove body, a movable groove body and a telescopic driver, the fixed groove body is fixed on the test frame, the movable groove body is slidably arranged on the fixed groove body, and the telescopic driver is installed on the fixed groove body, and the output end of the telescopic driver is connected with the movable groove body.

2. The blasting model test apparatus according to claim 1, characterized by: The screening device comprises a sifter for classifying and screening broken stones of different sizes, a weighter for weighing, a reciprocating driving mechanism for driving the sifter to reciprocate, a traction mechanism for traction of the sifter, a cleaning device for cleaning the broken stones stuck in the sifter, and a mounting frame for mounting the traction mechanism, the traction mechanism is connected with the sifter, and the reciprocating driving mechanism is connected with the sifter; the sifter comprises a bottom box and a plurality of screening boxes with different sizes of screen holes, the plurality of screening boxes are overlapped on the bottom box in sequence, the screen holes of the screening boxes gradually decrease from top to bottom, and the adjacent screening boxes are further connected through flexible connecting pieces.

3. The blasting model test apparatus according to claim 2, characterized by: The cleaning device comprises a power driver, a transmission mechanism and a cleaning assembly, the power driver is connected with the transmission mechanism, the transmission mechanism has a driving plate, the driving plate is provided with a driving hole, the cleaning assembly comprises a cleaning brush, a pulley, a mounting seat, a gear and a hanging rail, the hanging rail is installed on the screening box, the hanging rails are installed on the two sides of the screening box, the pulleys are slidably arranged on each hanging rail, the pulleys are rotatably installed on the mounting seats, the two ends of the cleaning brush are rotatably installed on the two mounting seats through shaft rods, the hanging rail is provided with a limiting piece for limiting the pulley, a transmission rod is installed on each mounting seat and connected with the driving plate, the shaft rod of the cleaning brush is further provided with a gear, and the lower end surface of the hanging rail is provided with a tooth portion, and the gear is engaged with the tooth portion.

4. The blasting model test apparatus according to claim 3, characterized by: The transmission mechanism comprises a telescopic transmission shaft, a connecting seat, a guide assembly, a sliding assembly, a retreat driver and a driving plate, one end of the telescopic transmission shaft is connected with the power driver, the other end of the telescopic transmission shaft is connected with the sliding assembly, the connecting seat is screwedly arranged on the telescopic transmission shaft, the guide assembly is installed on the mounting frame, the connecting seat is connected with the guide assembly, the retreat driver is installed on the connecting seat, the driving plate is installed on the retreat driver, and the connecting seat is connected with the cleaning assembly.

5. The blasting model test apparatus according to claim 3, wherein: The driving plate is provided with a driving hole, the transmission rod is inserted into the driving hole, and the driving hole on the driving plate is formed by downwardly recessing the top surface of the driving plate.

6. The blasting model test apparatus according to claim 2, characterized by: The screening device further comprises a weighing device for weighing the screening box and the bottom box, the traction mechanism comprises a traction rope, a traction motor and a winding wheel, the winding wheel is installed on the output shaft of the traction motor, one end of the traction rope is fixed on the winding wheel, and the other end of the traction rope is connected with the screening box.

7. The blasting model test apparatus according to claim 2, wherein: The screening device further comprises a reciprocating driving mechanism, the reciprocating driving mechanism comprises a reciprocating motor, a driving wheel and a connecting rod, one end of the connecting rod is eccentrically installed on the driving wheel, the bottom box is further provided with a connecting plate, the connecting plate is two, the two connecting plates are provided with connecting grooves, the other end of the connecting rod is T-shaped, and the other end of the connecting rod is clamped in the connecting groove of the bottom box.

8. The blasting model test apparatus of claim 1, wherein: It also includes a grabbing device for grabbing the rock model, the grabbing device includes a truss, a floating seat, a mounting plate, a grabbing motor, a drilling motor, a drill rod, a transmission assembly, a clamping jaw, a horizontal sliding rail, a limiting piece and a positioning rod, the floating seat is installed on the truss, the mounting plate is installed on the floating seat, the grabbing motor is installed on the mounting plate, the transmission assembly is installed on the mounting plate, the grabbing motor is connected with the transmission assembly, the grabbing motor drives the transmission assembly, the horizontal sliding rail is installed on the mounting plate, the clamping jaw is slidingly arranged on the corresponding horizontal sliding rail, the transmission assembly is connected with the clamping jaw, the positioning rod is installed on the mounting plate, the drilling motor is installed on the floating seat, the drill rod is connected with the drilling motor, and the drill rod is arranged on the transmission assembly.

9. The blasting model test apparatus according to claim 8, characterized by: The transmission assembly comprises an output gear, a transmission gear, a transmission sleeve, a lifting nut and a connecting rod, the output gear is installed on the output shaft of the grabbing motor, the transmission gear is installed on the transmission sleeve, the output gear is engaged with the transmission gear, the transmission sleeve is rotatably installed on the mounting plate through a bearing, the transmission sleeve is provided with external threads, the lifting nut is screwed on the transmission sleeve, one end of the connecting rod is pivoted to the lifting nut, and the other end of the connecting rod is pivoted to the clamping jaw.

10. The blasting model test apparatus according to claim 8, characterized by: The floating seat comprises 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 installed on the truss, the first floating rod is installed at both ends of the upper connecting plate, the movable seat is slidingly installed on the first floating rod, the first spring is sleeved on the first floating rod, the movable seat is provided with the first spring on both sides, the movable seat is provided with the second floating rod, the connecting block is slidingly arranged on the second floating rod, the second spring is sleeved on the second floating rod, the lower connecting plate is installed on the connecting block, the upper end of the third floating rod is slidingly arranged on the lower connecting plate, the upper end of the third floating rod is provided with a anti-loosening nut on the lower connecting plate, the lower end of the third floating rod is fixed on the mounting plate, and the third spring is sleeved on the third floating rod.

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