Automatic feeding device for blasting test

Abstract

The application discloses a kind of automatic feeding device of blasting test.The automatic feeding device of blasting test includes rack, test bearing plate, protective box, jacking driver, truss and grabbing device, the connecting end of the test bearing plate is rotatably installed on the rack, the jacking driver is installed on rack, the protective box is placed on the rack, and the protective box covers the test bearing plate, a front box door and a top box door are provided on the protective box, the front box door and the connecting end of the test bearing plate are located on the same side of the protective box, the bottom surface of the front box door is lower than the top surface of the test bearing plate, and the grabbing device is installed on the truss.The automatic feeding device of blasting test can automatically place the steel ring and the rock model on the test bearing plate, and drill holes in the rock model.

Description

Technical Field

[0001] This invention relates to the field of blasting test technology, and in particular to an automatic feeding device for blasting tests. Background Technology

[0002] When studying the influence of boundary constraints on the rock blasting and fragmentation effect, it is necessary to place the rock model at the test location, and steel rings may also be needed. Both the rock model and the steel rings have a certain weight, making them very difficult to move and resulting in excessive test preparation time. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an automatic feeding device for blasting tests that mechanically places rock models and steel rings.

[0004] To address the aforementioned problems, this invention provides an automatic feeding device for blasting tests. The automatic feeding device includes a frame, a test support plate, a protective box, a lifting driver, a truss, and a gripping device. The connecting end of the test support plate is rotatably mounted on the frame. The lifting driver is mounted on the frame. The protective box is placed on the 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 bottom surface of the front door is lower than the top surface of the test support plate. The gripping device is mounted on the truss.

[0005] Furthermore, the gripping device includes a floating seat, a mounting plate, a gripping motor, a drilling motor, a drill rod, a transmission assembly, grippers, slide rails, limiting components, 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 slide rails are mounted on the mounting plate, the grippers slide on the corresponding slide rails, 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.

[0006] 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.

[0007] Furthermore, the transmission assembly includes an output gear, a transmission gear, a transmission sleeve, a lifting nut, and a linkage 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 linkage rod is pivotally connected to the lifting nut, and the other end of the linkage rod is pivotally connected to the gripper.

[0008] Furthermore, the positioning rod is equipped with a pulley for reducing friction.

[0009] Furthermore, the gripping device also includes a limiting member for defining the floating seat, the limiting member being mounted on the mounting plate.

[0010] Furthermore, a front door driver is provided on the protective box, the front door driver is pivotally connected to the protective box, and the output end of the front door driver is pivotally connected to the front door.

[0011] Furthermore, a bracket is provided on the frame, a top door driver is installed on the bracket, the top door driver is connected to a connecting rod, and the connecting rod is connected to the top box door.

[0012] Furthermore, the frame has a support plate, and the lifting drive is mounted on the support plate.

[0013] Furthermore, the grippers are equipped with anti-slip pads to increase friction. This invention's automatic feeding device for blasting tests utilizes a truss and gripping device to place steel rings and rock models, eliminating the need for manual handling, saving time and effort. Simultaneously, it can utilize a lifting drive to discharge the crushed stone from the connection end of the test support plate, improving the efficiency of stone collection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a preferred embodiment of the automatic feeding device for blasting tests of the present invention.

[0015] Figure 2 This is a schematic diagram of the protective box installed on the frame.

[0016] Figure 3 This is a schematic diagram of the internal structure of the protective box.

[0017] Figure 4 yes Figure 2 A magnified view of part A in the image.

[0018] Figure 5 This is a schematic diagram of the structure supporting the flat plate.

[0019] Figure 6 This is a side view of the protective box.

[0020] Figure 7 This is a structural diagram of the top box door and the protective box.

[0021] Figure 8 This is a schematic diagram of the structure of the lifting test bearing plate by the lifting driver.

[0022] Figure 9 This is a schematic diagram of the gripping device.

[0023] Figure 10 This is the front view of the gripping device.

[0024] Figure 11 This is a side view of the gripping device.

[0025] Figure 12 This is a schematic diagram of the transmission assembly.

[0026] Figure 13 This is a schematic diagram of the structure when the grippers place the steel ring.

[0027] The labels in the attached drawings are as follows: Frame 1, Frame body 11, Bearing plate 12, Support plate 13, Rotary shaft connecting plate 14, Test bearing plate 2, Drive connecting plate 21, Protective box 3, Front box door 31, Positioning notch 32, Top box door 33, Lifting drive 41, Front door drive 42, Top door drive 43, Truss 5, Grabbing device 6, Floating seat 61, Upper connecting plate 611, Movable seat 612, Connecting block 613, Lower connecting plate 614, First floating rod 6151, Second floating rod 61 52. Third floating rod 6153, first spring 6161, second spring 6162, third spring 6163, mounting plate 62, gripping motor 631, drilling motor 632, transmission assembly 64, output gear 641, transmission gear 642, transmission sleeve 643, lifting nut 644, linkage rod 645, drill rod 65, gripper 66, anti-slip pad 661, slide rail 67, limit component 68, positioning rod 69, pulley 691, bracket 71, connecting rod 72, rock model 8, steel ring 9. Detailed Implementation

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] like Figure 1As shown, a preferred embodiment of the automatic feeding device for blasting tests of the present invention includes a frame 1, a test support plate 2, a protective box 3, a lifting drive 41, a truss 5, and a gripping device 6. The connecting end of the test support plate 2 is rotatably mounted on the frame 1. The test support plate 2 is used to support the blasted rock model 8 and simultaneously collect the blasted debris. The lifting drive 41 is mounted on the frame 1 and is used to lift the test support plate 2, causing it to tilt to displace the debris. The lifting drive 41 is typically a pneumatic cylinder; however, in other embodiments, a hydraulic cylinder or electric cylinder can also be used. The protective box 3 is placed on the frame 1 and covers the test support plate 2. The protective box 3 is used to limit the location of the debris during blasting, ensuring that all the debris falls onto the test support plate 2. The protective box 3 is equipped with a front door 31. The connection end of the front door 31 and the test support plate 2 is located on the same side of the protective box 3. The bottom surface of the front door 31 is lower than the top surface of the test support plate 2, thus ensuring that all the crushed stone can fall off the test support plate 2. The gripping device 6 is installed on the truss 5. The truss 5 drives the gripping device 6 to move in three dimensions, that is, the truss 5 can drive the gripping device 6 to move in the horizontal, vertical and vertical directions. The truss 5 is existing conventional equipment, and its working principle and structure will not be described in detail here. The gripping device 6 is used to grip the rock model 8 and the steel ring 9 and place them on the test support plate 2, and at the same time drill holes in the rock model 8. The truss 5 drives the gripping device 6 to move the steel ring 9 or the rock model 8 into the protective box 3. The gripping device 6 releases the steel ring 9 or the rock model 8, thereby placing the steel ring 9 or the rock model on the test support plate 2. After that, the blasting test can be carried out, realizing automatic feeding and reducing the burden of manpower. After the blasting is completed, the lifting driver 41 lifts the test bearing plate 2, thereby dumping the crushed stone, which can automatically discharge the crushed stone and facilitate its collection.

[0030] like Figures 2 to 7 As shown, the 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 41 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 2 is located within the clearance notch, and the output end of the lifting actuator 41 passes through the frame body 11 and connects to the test support plate 2. The test support plate 2 is provided with a drive connecting plate 21, which is used to connect to the lifting actuator 41. The lifting actuator 41 is connected to a connecting shaft that is connected to the drive connecting plate 21, meaning the connecting shaft on the lifting actuator 41 is rotatably mounted on the drive connecting plate 21.

[0031] The connecting end of the test support plate 2 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 frame 1.

[0032] The frame 1 is provided with a rotating shaft connecting plate 14, and the connecting end of the test bearing plate 2 is provided with a shaft rod, which is rotatably connected to the rotating shaft connecting plate 14.

[0033] The protective box 3 has a positioning notch 32 facing downwards. The positioning notch 32 is used to cooperate with the rotating shaft connecting plate 14 to fix the protective box 3 and prevent it from moving. The protective box 3 is provided with a front door actuator 42, which is pivotally connected to the protective box 3. The output end of the front door actuator 42 is pivotally connected to the front door 31. The front door actuator 42 is usually a cylinder, but it can also be a hydraulic cylinder or an electric cylinder. When the front door actuator 42 extends, the front door 31 closes; when the front door actuator 42 retracts, the front door 31 opens, allowing the actuator to reach into the protective box 3 for operation. The protective box 3 is also equipped with a top door 33, which is slidably mounted on the protective box 3. The top door 33 slides outward to open the protective box 3, allowing the aforementioned gripping mechanism to extend into the protective box 3 and place the rock model 8 or protective component onto the test support plate 2. The top plate of the protective box 3 serves as the top door 33, and a step is provided on the protective box 3, on which the top door 33 slides. A top door actuator 43 is provided on the frame 1, which is mounted on the frame 1 via a bracket 71. A connecting rod 72 is installed at the output end of the top door actuator 43, and the connecting rod 72 is fixed to the top door 33. The top door actuator 43 is typically a pneumatic cylinder, but a hydraulic cylinder or an electric cylinder can also be used. When the top door actuator 43 extends, the top door 33 opens; when the top door actuator 43 retracts, the top door 33 closes.

[0034] like Figure 8 As shown, when it is necessary to collect gravel, the container or equipment for collecting gravel is placed below the front door 31. The front door actuator 42 extends to open the front door 31, and then the lifting actuator 41 lifts the rear end of the test support plate 2, causing the test support plate 2 to tilt, thereby pouring the gravel out into the gravel collection container or equipment. After completion, the lifting actuator 41 resets, causing the test support plate 2 to reset, facilitating the next test. This method can quickly collect gravel, is convenient and fast, and requires no manual collection.

[0035] like Figures 9 to 11As shown, the gripping device 6 includes a floating seat 61, a mounting plate 62, a gripping motor 631, a transmission assembly 64, a drilling motor 632, a drill rod 65, grippers 66, slide rails 67, limiting components 68, and positioning rods 69. The floating seat 61 is mounted on the truss 5, and the mounting plate 62 is mounted on the floating seat 61. The mounting plate 62 can float in the horizontal, vertical, and longitudinal directions relying on the floating seat 61. The gripping motor 631 is mounted on the mounting plate 62, located on its top surface. The mounting plate 62 has mounting holes, and the transmission assembly 64 is mounted within these holes. The gripping motor 631 is connected to the transmission assembly 64, driving the transmission assembly 64. Two slide rails 67 are mounted on the mounting plate 62, symmetrically arranged, and located on the bottom surface of the mounting plate 62. Two grippers 66 are provided, each slidingly mounted on a corresponding slide rail 67. A transmission assembly 64 is connected to the two grippers 66, driving them to move in opposite directions to grasp or release objects. Two positioning rods 69 are provided, each mounted on the mounting plate 62 and symmetrically arranged. These positioning rods engage with the rock model 8 placed on the test support plate 2, positioning the mounting plate 62 to ensure the gripped steel ring 9 is concentrically placed with the rock model 8. A drilling motor 632 is mounted on the floating seat 61. A drill rod 65 is inserted into the transmission assembly 64, with its lower end extending out. The drilling motor 632 drives the drill rod 65 to rotate, drilling a hole at the center of the rock model 8, thus forming a blast hole. The limiting member 68 is mounted on the mounting plate 62, located on the top surface of the mounting plate 62. The limiting member 68 limits the minimum vertical distance between the mounting plate 62 and the floating seat 61 to ensure the safety of the gripping motor 631 and the drilling motor 632, preventing them from being squeezed by the floating seat 61 and the mounting plate 62. The lower end of the limiting member 68 is lower than the lower end of the gripper 66, ensuring that the limiting member 68 contacts the rock model 8 before the gripper 66. This ensures that the steel ring 9 is positioned before contacting the test support plate 2, preventing the steel ring 9 from sliding on the test support plate 2 and damaging it. The lower end of the drill rod 65 is higher than the lower end of the gripper 66, ensuring that the drill rod 65 does not contact the rock model 8 when drilling is not required.

[0036] The floating seat 61 includes an upper connecting plate 611, a movable seat 612, a connecting block 613, a lower connecting plate 614, a first floating rod 6151, a second floating rod 6152, a third floating rod 6153, a first spring 6161, a second spring 6162, and a third spring 6163. There are two upper connecting plates 611, which are used to connect to the truss 5, i.e., the upper connecting plates 611 are installed on the truss 5. The two ends of the first floating rod 6151 are respectively installed on the upper connecting plates 611. The movable seat 612 is installed on the first floating rod 6151, and the movable seat 612 is located between the two upper connecting plates 611. Of course, in other embodiments, the upper connecting plate 611 can also be a U-shaped plate. The first spring 6161 is sleeved on the first floating rod 6151. A first spring 6161 is provided on both sides of the movable seat 612. The two ends of the first spring 6161 abut against the movable seat 612 and the upper connecting plate 611, respectively. Thus, the first spring 6161 can return the movable seat 612 to its original position whenever it moves laterally. A second floating rod 6152 is provided on the movable seat 612. The connecting block 613 is slidably mounted on the second floating rod 6152, allowing it to slide on the second floating rod 6152. The second spring 6162 is sleeved on the second floating rod 6152. A second spring 6162 is provided on both sides of the connecting block 613. The two ends of the second spring 6162 abut against the movable seat 612 and the connecting block 613, respectively. Thus, the second spring 6162 can return the connecting block 613 to its original position whenever it slides on the second floating rod 6152. The lower connecting plate 614 is mounted on the connecting block 613. The upper end of the third floating rod 6153 is slidably mounted on the lower connecting plate 614. An anti-loosening nut is installed on the upper end of the third floating rod 6153 on the lower connecting plate 614. The lower end of the third floating rod 6153 is fixed on the mounting plate 62, so the mounting plate 62 can float in the vertical direction and can automatically reset by gravity. The drilling motor 632 is mounted on the bottom surface of the lower connecting plate 614. The third spring 6163 is sleeved on the third floating rod 6153. The third spring 6163 is used to slow down the speed at which the distance between the mounting plate 62 and the lower connecting plate 614 decreases, so that the drill rod 65 can slowly contact the rock model 8, avoiding a strong impact on the rock model 8, and thus protecting the drill rod 65 from damage due to impact.

[0037] like Figure 12As shown, the transmission assembly 64 includes an output gear 641, a transmission gear 642, a transmission sleeve 643, a lifting nut 644, and a linkage rod 645. The output gear 641 is mounted on the output shaft of the gripping motor 631, and the transmission gear 642 is mounted on the transmission sleeve 643. The output gear 641 meshes with the transmission gear 642. Both the output gear 641 and the transmission gear 642 are bevel gears, allowing the gripping motor 631 to be positioned on one side of the transmission sleeve 643, and the drilling motor 632 to be mounted above the transmission sleeve 643. The transmission sleeve 643 is rotatably mounted on the mounting plate 62 via bearings. The transmission gear 642 drives the transmission sleeve 643 to rotate. The transmission sleeve 643 has a through hole at its center for inserting a drill rod 65, ensuring that the lower end of the drill rod 65 is located below the mounting plate 62 for easy drilling. The transmission sleeve 643 is provided with external threads, and the lifting nut is screwed onto the transmission sleeve 643. The rotation of the transmission sleeve 643 drives the lifting nut to move up and down. One end of the linkage rod 645 is pivotally connected to the lifting nut, and the other end of the linkage rod 645 is pivotally connected to the gripper 66. Each gripper 66 is connected to at least one linkage rod 645. The up and down movement of the lifting nut pulls the two grippers 66 to move in opposite directions or towards each other through the linkage rod 645.

[0038] like Figure 13As shown, when it is necessary to grasp the rock model 8 or the steel ring 9, the truss 5 drives the grasping mechanism to move to the position of the steel ring 9 or the rock model 8. Then, the grasping motor 631 drives the output gear 641 to rotate. The output gear 641 drives the transmission gear 642 to rotate. The transmission gear 642 drives the transmission sleeve 643 to rotate. The rotation of the transmission sleeve 643 causes the lifting nut 644 to move upward. The upward movement of the lifting nut 644 causes the linkage rod 645 to move. The movement of the linkage rod 645 causes the two grippers 66 to move towards each other, thereby grasping the rock model 8 or the steel ring 9 and completing the grasping. Conversely, the steel ring 9 or the rock model 8 can be released. When the rock model 8 is gripped, during the descent of the steel ring 9, the positioning rod 69 first contacts the rock model 8. Under the action of the floating seat 61, the positioning rod 69 automatically corrects its alignment, placing the steel ring 9 concentrically with the rock model 8. Since the gripper 66 still holds the steel ring 9 at this time, the mounting plate 62 will not move downwards. Due to the third spring 6163, the downward speed is reduced, preventing the steel ring 9 from violently impacting the test bearing plate 2. After the steel ring 9 is placed, the truss 5 continues to move downwards, driving the upper connecting plate 611 downwards. Simultaneously, the drilling motor 632 starts rotating, and the drill rod 65 slowly contacts the rock model 8 to drill a hole. After the drill rod 65 contacts the rock model 8, the gripping motor 631 drives the gripper 66 to release the steel ring 9, preventing the gripper 66 from restricting the downward movement of the drill rod 65. Throughout the process, there is no need for manual handling of the steel ring 9 and the rock model 8; mechanical gripping and placement saves time and effort. The drilling of the blast hole in the rock model 8 can be completed during the placement of the steel ring 9, resulting in high efficiency.

[0039] The positioning rod 69 is equipped with a pulley 691, which contacts the rock model 8. This enables rolling friction, effectively preventing damage to the rock model 8. Compared to the positioning rod 69 directly sliding against the rock model 8, this extends the service life of the positioning rod 69.

[0040] The gripper 66 is provided with an anti-slip pad 661, which is used to increase friction and improve the gripping force on the rock model 8 and the steel ring 9; the anti-slip pad 661 is usually made of rubber.

[0041] In use, the truss 5 moves the gripping device 6 to the position where the rock model 8 is placed and grips the rock model 8. At the same time, the top door actuator 43 opens the top box door 33. Then, the truss 5 moves the gripping device 6 to place the rock model 8 on the test support plate 2, and the gripping device 6 releases the rock model 8. The truss 5 continues to move the gripping device 6 to the position where the steel ring 9 is placed. The gripping device 6 grips the steel ring 9, and the truss 5 moves the gripping device 6 to place the steel ring 9 and the rock model 8 concentrically on the test support plate. At the same time, a blast hole is drilled for the rock model 8. After completion, the truss 5 moves the gripping device 6 out of the protective box 3, and the top door actuator 43 closes the top box door 33. If the test does not require the placement of the steel ring 9, the blast hole is drilled when the rock model 8 is placed. After the blast hole is completed, the gripping device 6 moves out of the protective box 3 under the action of the truss 5, and then the top box door 33 is closed. Afterwards, the front door actuator 42 opens the front box door 31, allowing explosives to be placed into the borehole. Then, borehole plugs are placed into the borehole. If plugging is not required for the test, the front box door 31 can be closed after the explosives are placed. Finally, the blasting can begin. After the blasting is complete, the top door actuator 43 opens the top box door 33, and the truss 5 moves the grabbing device 6 to remove the steel ring 9. Then, the front door actuator 42 opens the front box door 31. If the steel ring 9 is not placed, the front box door 31 is opened directly. After the front box door 31 is opened, the lifting actuator 41 lifts the test support plate 2, tilting it. At this point, the crushed stone can be received at the position of the front box door 31. Mechanical feeding is convenient and fast, automatically discharging the stone, eliminating the need for manual collection, and resulting in high stone collection efficiency. 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 content of the present invention's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of the present invention.

Claims

1. An automatic feeding device for blasting tests, characterized in that: The device includes a frame, a test support plate, a protective box, a lifting drive, a truss, and a gripping device. The connecting end of the test support plate is rotatably mounted on the frame. The lifting drive is mounted on the frame. The protective box is placed on the frame and covers the test support plate. The protective box is provided with 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 bottom surface of the front door is lower than the top surface of the test support plate. The gripping device is mounted on the truss. The gripping device includes a floating seat, a mounting plate, a gripping motor, a drilling motor, a drill rod, a transmission assembly, grippers, slide rails, limiting components, 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 slide rails are mounted on the mounting plate, the grippers slide on the corresponding slide rails, 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. The drill rod rotates to drill a hole at the center of the rock model, thereby forming a blast hole; 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. The transmission assembly includes an output gear, a transmission gear, a transmission sleeve, a lifting nut, and a linkage 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 linkage rod is pivotally connected to the lifting nut, and the other end of the linkage rod is pivotally connected to the gripper.

2. The automatic feeding device for blasting tests as described in claim 1, characterized in that: The positioning rod is equipped with a pulley to reduce friction.

3. The automatic feeding device for blasting tests as described in claim 2, characterized in that: The limiting component is mounted on the mounting plate.

4. The automatic feeding device for blasting tests as described in claim 3, characterized in that: The protective enclosure is equipped with a front door driver, which is pivotally connected to the protective enclosure, and the output end of the front door driver is pivotally connected to the front door.

5. The automatic feeding device for blasting tests as described in claim 1, characterized in that: A bracket is provided on the frame, and a top door driver is installed on the bracket. The top door driver is connected to a connecting rod, and the connecting rod is connected to the top box door.

6. The automatic feeding device for blasting tests as described in claim 1, characterized in that: The frame has a support plate, and the lifting drive is mounted on the support plate.

7. The automatic feeding device for blasting tests as described in claim 1, characterized in that: The grippers are equipped with anti-slip pads to increase friction.

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