Drilling and blasting construction device for slope brushing engineering

Abstract

The invention relates to the technical field of drilling and blasting construction, and discloses a drilling and blasting construction device for slope brushing engineering, which comprises a ship body, a truss fixedly mounted on the ship body, a drilling mechanism, a grabbing mechanism capable of grabbing gravels with different sizes, and a hoisting mechanism for driving the drilling mechanism and the grabbing mechanism to move up and down, the hoisting mechanism is arranged on the truss, the drilling mechanism comprises a positioning table, a mounting seat, a first motor and a drilling rod, a driving part for controlling the mounting seat to move up and down is arranged on the positioning table, the first motor is fixedly mounted on the mounting seat, and an output shaft of the first motor penetrates through the mounting seat; and the drill rod is fixedly mounted on an output shaft of the first motor. The grab bucket aims at solving the problem that according to an existing drilling and blasting construction device for slope brushing engineering, after drilling and blasting are completed, the grab bucket cannot efficiently clean an underwater channel.

Description

Technical Field

[0001] The present invention belongs to the technical field of drill and blast construction, and particularly relates to a drill and blast construction device for slope brushing projects. Background Art

[0002] The slope brushing project is a key link in the construction of infrastructure such as water conservancy, transportation, and ports. Its core goal is to form a stable slope structure that meets the design requirements. In the onshore environment, the slope brushing technology is relatively mature, and usually adopts the methods of mechanical excavation or trimming after blasting. Underwater drill and blast construction is an important pre - process for slope brushing projects, and its technological development directly affects the subsequent slope forming quality. Underwater drilling and blasting technology is an efficient engineering technology used for breaking underwater rock formations or concrete structures, and is widely used in fields such as ocean engineering, port construction, and waterway dredging. Its principle is to drill holes through an underwater drill and load waterproof explosives, use a detonating device to detonate the explosives, and break the target with the explosion energy. The main equipment includes an underwater drill, waterproof explosives (such as emulsion explosives), a detonating device (such as an electric detonator), and auxiliary equipment (such as diving equipment and a positioning system). The construction process includes drilling, charging, stemming, detonation, and effect inspection.

[0003] Currently, after underwater drill and blast, a grab bucket is needed to salvage the crushed stones to clean the waterway. When grabbing larger crushed stones, the bucket valves of the grab bucket are easily stuck by the crushed stones, and when the grab bucket closes, it will lift up the sediment together, affecting the efficiency of underwater waterway cleaning. Therefore, we propose a drill and blast construction device for slope brushing projects to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the existing drill and blast construction device for slope brushing projects cannot efficiently clean the underwater waterway after drill and blast.

[0005] To achieve the above - mentioned technical purpose, the technical solution adopted by the present invention is as follows:

[0006] A drill and blast construction device for slope brushing projects, comprising a hull, a truss fixedly installed on the hull, a drilling mechanism, a grabbing mechanism capable of grabbing crushed stones of different sizes, and a lifting mechanism for driving the drilling mechanism and the grabbing mechanism to move up and down. The lifting mechanism is arranged on the truss. The drilling mechanism includes a positioning table, a mounting seat, a first motor, and a drill rod. A driving member for controlling the up - and - down movement of the mounting seat is arranged on the positioning table. The first motor is fixedly installed on the mounting seat. The output shaft of the first motor penetrates through the mounting seat, and the drill rod is fixedly installed on the output shaft of the first motor.

[0007] Further defined, the lifting mechanism includes a first electric hoist and a second electric hoist. Two parallel distribution guide rails are fixedly installed on the truss. The first electric hoist and the second electric hoist are respectively slidably installed on the two guide rails. Pulling ropes are wound around the first electric hoist and the second electric hoist. The first electric hoist and the second electric hoist are respectively connected to the drilling mechanism and the grasping mechanism through the pulling ropes. With such a structural design, the first electric hoist and the second electric hoist can respectively drive the drilling mechanism and the grasping mechanism to move up and down through the pulling ropes to complete the drilling and blasting and underwater channel cleaning work.

[0008] Further defined, the grasping mechanism includes an upper bearing beam, a plurality of support rods, a hydraulic cylinder, a lower bearing beam and a plurality of main teeth. The upper bearing beam is connected to the first electric hoist through a pulling rope. The plurality of support rods are rotatably installed at equal intervals on the lower edge of the upper bearing beam. The hydraulic cylinder is fixedly installed at the center of the lower end of the upper bearing beam. The lower bearing beam is rotatably installed at the lower end of the hydraulic cylinder. The plurality of main teeth are rotatably installed at equal intervals on the edge of the lower bearing beam. The number of the plurality of main teeth is the same as that of the plurality of support rods. A transfer seat is provided on the plurality of main teeth. The plurality of main teeth are rotatably connected to the lower ends of the adjacent support rods through the transfer seat. A groove is provided at the lower end of the main tooth. An active tooth is movably inserted into the groove. A compression spring is fixedly installed between the active tooth and the groove. With such a structural design, when the hydraulic cylinder expands and contracts, it can drive the main teeth to contract or extend through the support rods to clamp the crushed stones. When the crushed stone blocks are relatively large, the active tooth is stressed and squeezed, and the compression spring will retract into the groove to prevent the main teeth from being stuck and affecting the efficiency of crushed stone cleaning.

[0009] Further defined, a telescopic frame is provided between adjacent main teeth. The telescopic frame is provided with auxiliary teeth that can cooperate with the main teeth to clamp the crushed stones. An active groove is provided at the lower end of the auxiliary tooth. An active end is movably installed in the active groove. A return spring is provided between the active end and the wall of the active groove. With such a structural design, the auxiliary teeth can cooperate with the main teeth to clamp the smaller crushed stones, and the function of the active end is the same as that of the active tooth, which can prevent jamming during grasping.

[0010] Further defined, the telescopic frame is composed of four connecting rods. The ends of the four connecting rods are hinged to form a movable quadrilateral structure. A limiting frame is rotatably installed at the hinged point above the telescopic frame, and a mounting frame is rotatably installed at the hinged point below. The auxiliary teeth are inserted through the limiting frame and the mounting frame. A limiting groove and a slot are provided on the auxiliary teeth. A fixing column adapted to the limiting groove is fixedly installed in the limiting frame, and a plug column adapted to the slot is fixedly installed in the mounting frame. With such a structural design, when the telescopic frame is subjected to the extrusion force of the main teeth, the upper and lower hinged points move away from each other, which will drive the auxiliary teeth to move downward and move along the direction of the limiting groove to smoothly grasp the crushed stones, increasing the success rate of grasping.

[0011] Further defined, a transfer member is provided between the telescopic frame and the main tooth. The transfer member includes a transfer end head. A rotating column is rotatably inserted into the main tooth. Both ends of the rotating column penetrate through the main tooth and are fixedly installed with fixing blocks. The fixing blocks are rotatably connected to the transfer end head. A transmission assembly is provided on the main tooth to drive the rotating column to rotate adaptively. With such a structural design, when the main tooth rotates to grab gravel, the transmission assembly drives the rotating column to rotate, keeping the fixing blocks always in an upward state, thus ensuring the normal movement of the transfer end head and the telescopic frame.

[0012] Further defined, the transmission assembly includes a fixing strip, an arc-shaped pushing strip and a rack. The fixing strip is fixedly installed on the main tooth. A chute is opened on one side of the fixing strip close to the main tooth. The arc-shaped pushing strip is movably installed in the chute. The rack is fixedly installed at one end of the arc-shaped pushing strip close to the transfer seat. A tooth groove adapted to the rack is provided at one end of the support rod located at the transfer seat. A dial block is fixedly installed on the rotating column. A communication groove communicating with the chute is opened in the main tooth. The dial block moves in the communication groove. A force-receiving groove adapted to the dial block is opened on the arc-shaped pushing strip. With such a structural design, when the main tooth rotates, the arc-shaped pushing strip can be driven by the rack to move, so as to drive the rotating column to rotate through the dial block.

[0013] Further defined, the driving member includes a vertical installation column and a second motor. The vertical installation column is fixedly installed on the positioning table. The second motor is fixedly installed at the upper end of the vertical installation column. A limit card slot is opened in the vertical installation column. The installation seat is slidably clamped in the limit card slot. A threaded rod is fixedly installed on the output shaft of the second motor. The threaded rod extends into the limit card slot and is threadedly connected to the installation seat. With such a structural design, the structure is simple and convenient to use.

[0014] The invention adopting the above technical solution has the following advantages:

[0015] 1. In the present invention, the lifting mechanism cooperates with the drilling mechanism and the grabbing mechanism, and can drill holes and conduct blasting underwater. The broken rocks can be grabbed from the bottom of the water through the grabbing mechanism. The movable teeth at the end of the main tooth can be telescopic, which can prevent the grabbing mechanism from getting stuck when contacting large pieces of gravel. Moreover, the grabbing mechanism can leak out sediment when grabbing, so as to reduce the load of the grabbing mechanism and improve the work efficiency.

[0016] 2. In the present invention, when the grabbing mechanism works and the main tooth contracts, the telescopic frame moves with the main tooth, and the telescopic frame cooperates with the limit frame and the installation frame to drive the secondary tooth to move downward, which can more smoothly support the gravel, so as to cooperate with the main tooth to tightly hold the smaller-sized gravel, improving the grabbing ability of the grabbing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention can be further illustrated by the non-limiting embodiments given in the drawings;

[0018] Figure 1 Schematic structural diagram of a drilling and blasting construction device for a slope brushing project of the present invention;

[0019] Figure 2 Schematic structural diagram of the drilling mechanism part in a drilling and blasting construction device for a slope brushing project of the present invention;

[0020] Figure 3 Schematic structural diagram of the grasping mechanism part in a drilling and blasting construction device for a slope brushing project of the present invention;

[0021] Figure 4 Schematic structural diagram of the telescopic frame part in a drilling and blasting construction device for a slope brushing project of the present invention;

[0022] Figure 5 Schematic structural diagram of the main tooth and strut part in a drilling and blasting construction device for a slope brushing project of the present invention;

[0023] Figure 6 Cross-sectional structural diagram of the main tooth and strut part in a drilling and blasting construction device for a slope brushing project of the present invention;

[0024] Figure 7 It is Figure 6 Enlarged structural diagram at A in;

[0025] Figure 8 It is Figure 6 Enlarged structural diagram at B in;

[0026] Figure 9 Schematic structural diagram of the rotating column part in a drilling and blasting construction device for a slope brushing project of the present invention.

[0027] Explanation of main component symbols is as follows:

[0028] 1. Hull; 2. Truss;

[0029] 3. Drilling mechanism;

[0030] 31. Positioning table; 311. Vertical mounting column; 312. Second motor;

[0031] 32. Mounting seat; 33. First motor; 34. Drill pipe;

[0032] 4. Grasping mechanism; 41. Upper bearing beam; 42. Strut; 43. Hydraulic cylinder; 44. Lower bearing beam;

[0033] 45. Main tooth;

[0034] 451. Rotating column; 4511. Pusher block;

[0035] 452. Fixed block;

[0036] 453. Fixed bar; 4531. Arc-shaped pushing bar; 4532. Rack

[0037] 46. Movable tooth; 47. Compression spring

[0038] 5. Hoisting mechanism; 51. First electric hoist; 52. Second electric hoist

[0039] 6. Telescopic frame; 61. Limit frame; 62. Installation frame; 63. Adapter end

[0040] 7. Auxiliary tooth; 71. Movable end Detailed implementation mode

[0041] The present invention will be described in detail below in conjunction with the drawings and specific embodiments. It should be noted that in the drawings or the description of the specification, similar or identical parts are all denoted by the same reference numerals. The implementation manners not shown or described in the drawings are the forms known to those of ordinary skill in the art. In addition, the directional terms mentioned in the embodiments, such as "upper", "lower", "top", "bottom", "left", "right", "front", "rear", etc., are only references to the directions of the drawings and are not used to limit the protection scope of the present invention.

[0042] As Figures 1 to 9 shown, a drilling and blasting construction device for a slope brushing project of the present invention includes a hull 1, a truss 2 fixedly installed on the hull 1, a drilling mechanism 3, a grasping mechanism 4 capable of grasping gravels of different sizes, and a hoisting mechanism 5 for driving the drilling mechanism 3 and the grasping mechanism 4 to move up and down. The hoisting mechanism 5 is arranged on the truss 2. The truss 2 is a frame structure, and one end close to the tail of the hull 1 is an inverted triangle, so that the hoisting mechanism 5 can take the drilling mechanism 3 and the grasping mechanism 4 away from the hull 1 and smoothly hoist them underwater. The drilling mechanism 3 includes a positioning table 31, a mounting seat 32, a first motor 33 and a drill rod 34. A driving member for controlling the up and down movement of the mounting seat 32 is arranged on the positioning table 31. The first motor 33 is fixedly installed on the mounting seat 32. The output shaft of the first motor 33 penetrates through the mounting seat 32, and the drill rod 34 is fixedly installed on the output shaft of the first motor 33.

[0043] The hoisting mechanism 5 includes a first electric hoist 51 and a second electric hoist 52. Two parallel guide rails are fixedly installed on the truss 2. The first electric hoist 51 and the second electric hoist 52 are respectively slidably installed on the two guide rails. A driving seat for driving the first electric hoist 51 and the second electric hoist 52 to move is arranged on the guide rail. A roller driven by a motor is arranged on the driving seat. The roller contacts the outer wall of the guide rail and can push the first electric hoist 51 or the second electric hoist 52 to move along the guide rail. Pulling ropes are wound around both the first electric hoist 51 and the second electric hoist 52. The first electric hoist 51 and the second electric hoist 52 are respectively connected to the drilling mechanism 3 and the grasping mechanism 4 through the pulling ropes.

[0044] The grasping mechanism 4 includes an upper bearing beam 41, a plurality of support rods 42, a hydraulic cylinder 43, a lower bearing beam 44 and a plurality of main teeth 45. The upper bearing beam 41 is connected to the first electric hoist 51 through a cable. The plurality of support rods 42 are rotatably installed at equal intervals on the lower edge of the upper bearing beam 41. The hydraulic cylinder 43 is fixedly installed at the center of the lower end of the upper bearing beam 41. The lower bearing beam 44 is rotatably installed at the lower end of the hydraulic cylinder 43. The plurality of main teeth 45 are rotatably installed at equal intervals on the edge of the lower bearing beam 44. The number of the plurality of main teeth 45 is the same as that of the plurality of support rods 42. A transfer seat is provided on the plurality of main teeth 45. The plurality of main teeth 45 are rotatably connected to the lower ends of the adjacent support rods 42 through the transfer seat. A groove is provided at the lower end of the main tooth 45. A movable tooth 46 is movably inserted into the groove. A compression spring 47 is fixedly installed between the movable tooth 46 and the groove. The compression spring 47 can drive the movable tooth 46 to return to the initial state, facilitating the subsequent cleaning work of the grasping mechanism 4.

[0045] A telescopic frame 6 is provided between adjacent main teeth 45. A sub-tooth 7 that can cooperate with the main tooth 45 to clamp the crushed stones is provided on the telescopic frame 6. An activity groove is provided at the lower end of the sub-tooth 7. An activity end 71 is movably installed in the activity groove. A return spring is provided between the activity end 71 and the wall of the activity groove.

[0046] The telescopic frame 6 is composed of four connecting rods. The ends of the four connecting rods are hinged to form a movable quadrilateral structure. A limiting frame 61 is rotatably installed at the hinged point above the telescopic frame 6. An installation frame 62 is rotatably installed at the hinged point below. The sub-tooth 7 is inserted through the limiting frame 61 and the installation frame 62. A limiting groove and a slot are provided on the sub-tooth 7. A fixing column adapted to the limiting groove is fixedly installed in the limiting frame 61. A plug column adapted to the slot is fixedly installed in the installation frame 62. When the two ends of the telescopic frame 6 are subjected to the acting force applied by the main tooth 45, the upper and lower hinged points of the telescopic frame 6 move away from each other. The installation frame 62 drives the sub-tooth 7 to move downward. The limiting frame 62 will exert a guiding effect on the sub-tooth 7, enabling the sub-tooth 7 to move along the direction of the limiting groove, and facilitating the grasping of the crushed stones more smoothly.

[0047] A transfer member is provided between the telescopic frame 6 and the main tooth 45. The transfer member includes a transfer end 63. A rotating column 451 is rotatably inserted on the main tooth 45. Both ends of the rotating column 451 penetrate through the main tooth 45 and are fixedly installed with fixing blocks 452. The fixing blocks 452 are rotatably connected to the transfer end 63. A transmission component capable of driving the rotating column 451 to perform adaptive rotation is provided on the main tooth 45.

[0048] The transmission assembly includes a fixed bar 453, an arc-shaped push bar 4531 and a rack 4532. The fixed bar 453 is fixedly installed on the main gear 45. A chute is provided on one side of the fixed bar 453 close to the main gear 45. The arc-shaped push bar 4531 is movably installed in the chute. The rack 4532 is fixedly installed at one end of the arc-shaped push bar 4531 close to the adapter seat. A tooth groove adapted to the rack 4532 is provided at one end of the support rod 42 located at the adapter seat. A dial block 4511 is fixedly installed on the rotating column 451. A communication groove communicating with the chute is provided in the main gear 45. The dial block 4511 moves in the communication groove. A force-receiving groove adapted to the dial block 4511 is provided on the arc-shaped push bar 4531.

[0049] The driving member includes a vertical mounting column 311 and a second motor 312. The vertical mounting column 311 is fixedly installed on the positioning table 31. The second motor 312 is fixedly installed at the upper end of the vertical mounting column 311. A limiting card slot is provided in the vertical mounting column 311. The mounting seat 32 is slidably clamped in the limiting card slot. A threaded rod is fixedly installed on the output shaft of the second motor 312. The threaded rod extends into the limiting card slot and is threadedly connected to the mounting seat 32.

[0050] The usage method of the present invention is as follows:

[0051] During use, the second electric hoist 52 works, and the drilling mechanism 3 is hoisted to the bottom of the water through the pulling rope. The first motor 33 and the second motor 312 work. While driving the drill rod 34 to rotate, the drill rod 34 is slowly lowered to drill holes underwater. After the drilling is completed, the drill rod 34 retracts, explosives are put into the holes, the second electric hoist 52 works again, the drilling mechanism 3 is hoisted, and the hull 1 evacuates to a safe area. At this time, the explosives are detonated, and the underwater rock layer can be broken;

[0052] The hull 1 sails to the blasting point again. The first electric hoist 51 works, and the grasping mechanism 4 is lowered underwater through the pulling rope. When the grasping mechanism 4 covers the crushed stones, the hydraulic cylinder 43 contracts, and the main gear 45 contracts inward under the thrust of the support rod 42 to clamp the crushed stones;

[0053] When the main gear 45 contracts, the telescopic frame 6 located between the main gears 45 is subjected to a squeezing force. The upper and lower hinge points of the telescopic frame 6 move away from each other. The auxiliary gear 7 moves downward under the drive of the mounting frame 62 and the guidance of the limiting frame 61 to lift the crushed stones upward, so as to facilitate the grasping of smaller crushed stones;

[0054] After the grasping mechanism 4 grabs the crushed stones, the first electric hoist 51 works, and the grasping mechanism 4 and the crushed stones can be dragged upward as a whole through the pulling rope until they are brought to the transport ship, which provides convenience for the subsequent slope brushing project and improves the efficiency of the entire slope brushing project.

[0055] The above has introduced in detail a drilling and blasting construction device for slope brushing projects provided by the present invention. The description of the specific embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A drilling and blasting construction device for slope brushing project, comprising a hull (1), a truss (2) fixedly installed on the hull (1), a drilling mechanism (3), a grasping mechanism (4) capable of grasping gravels of different sizes, and a hoisting mechanism (5) for driving the drilling mechanism (3) and the grasping mechanism (4) to move up and down. The hoisting mechanism (5) is arranged on the truss (2), and is characterized in that: The drilling mechanism (3) includes a positioning table (31), a mounting seat (32), a first motor (33) and a drill pipe (34). A driving member for controlling the up-and-down movement of the mounting seat (32) is provided on the positioning table (31). The first motor (33) is fixedly installed on the mounting seat (32). The output shaft of the first motor (33) penetrates through the mounting seat (32), and the drill pipe (34) is fixedly installed on the output shaft of the first motor (33).

2. The drill and blast construction device for slope brushing project according to claim 1, wherein: The lifting mechanism (5) includes a first electric hoist (51) and a second electric hoist (52). Two parallel guide rails are fixedly installed on the truss (2). The first electric hoist (51) and the second electric hoist (52) are respectively slidably installed on the two guide rails. Pulling ropes are wound around both the first electric hoist (51) and the second electric hoist (52). The first electric hoist (51) and the second electric hoist (52) are respectively connected to the drilling mechanism (3) and the grasping mechanism (4) through the pulling ropes.

3. The drill and blast construction device for slope brushing project according to claim 2, characterized in that: The grasping mechanism (4) includes an upper bearing beam (41), a plurality of support rods (42), a hydraulic cylinder (43), a lower bearing beam (44) and a plurality of main teeth (45). The upper bearing beam (41) is connected to the first electric hoist (51) through a pulling rope. The plurality of support rods (42) are rotatably installed at equal intervals on the lower edge of the upper bearing beam (41). The hydraulic cylinder (43) is fixedly installed at the center of the lower end of the upper bearing beam (41). The lower bearing beam (44) is rotatably installed at the lower end of the hydraulic cylinder (43). The plurality of main teeth (45) are rotatably installed at equal intervals on the edge of the lower bearing beam (44). The number of the plurality of main teeth (45) is the same as that of the plurality of support rods (42). A transfer seat is provided on the plurality of main teeth (45). The plurality of main teeth (45) are rotatably connected to the lower ends of the adjacent support rods (42) through the transfer seat. A groove is provided at the lower end of the main tooth (45). An active tooth (46) is movably inserted into the groove. A compression spring (47) is fixedly installed between the active tooth (46) and the groove.

4. The drill and blast construction device for slope brushing project according to claim 3, wherein: An expansion and contraction frame (6) is provided between adjacent main teeth (45). A secondary tooth (7) capable of cooperating with the main teeth (45) to clamp the crushed stones is provided on the expansion and contraction frame (6). An active groove is provided at the lower end of the secondary tooth (7). An active end (71) is movably installed in the active groove. A return spring is provided between the active end (71) and the wall of the active groove.

5. The drill and blast construction device for slope brushing project according to claim 4, wherein: The expansion and contraction frame (6) is composed of four connecting rods. The ends of the four connecting rods are hinged to form a movable quadrilateral structure. A limiting frame (61) is rotatably installed at the hinged point of the expansion and contraction frame (6) located above. A mounting frame (62) is rotatably installed at the hinged point of the expansion and contraction frame (6) located below. The secondary tooth (7) is arranged in the limiting frame (61) and the mounting frame (62). A limiting groove and a slot are provided on the secondary tooth (7). A fixing column adapted to the limiting groove is fixedly installed in the limiting frame (61). A plug column adapted to the slot is fixedly installed in the mounting frame (62).

6. The drill and blast construction device for slope brushing project according to claim 4, characterized in that: A transfer member is provided between the telescopic frame (6) and the main tooth (45). The transfer member includes a transfer end head (63). A rotating column (451) is rotatably inserted into the main tooth (45). Both ends of the rotating column (451) penetrate through the main tooth (45) and are fixedly installed with fixing blocks (452). The fixing blocks (452) are rotatably connected to the transfer end head (63). A transmission assembly is provided on the main tooth (45) that can drive the rotating column (451) to make adaptive rotation.

7. The drill and blast construction device for slope brushing engineering according to claim 6, characterized in that: The transmission assembly includes a fixing strip (453), an arc-shaped push strip (4531), and a rack (4532). The fixing strip (453) is fixedly installed on the main tooth (45). A sliding groove is opened on one side of the fixing strip (453) close to the main tooth (45). The arc-shaped push strip (4531) is movably installed in the sliding groove. The rack (4532) is fixedly installed at one end of the arc-shaped push strip (4531) close to the transfer seat. A tooth groove adapted to the rack (4532) is provided at one end of the support rod (42) located at the transfer seat. A dial block (4511) is fixedly installed on the rotating column (451). A communication groove communicating with the sliding groove is opened in the main tooth (45). The dial block (4511) moves in the communication groove. A force-receiving groove adapted to the dial block (4511) is opened on the arc-shaped push strip (4531).

8. The drill and blast construction device for slope brushing project according to claim 1, wherein: The driving member includes a vertical installation column (311) and a second motor (312). The vertical installation column (311) is fixedly installed on the positioning table (31). The second motor (312) is fixedly installed at the upper end of the vertical installation column (311). A limit card slot is opened in the vertical installation column (311). The installation seat (32) is slidably clamped in the limit card slot. A threaded rod is fixedly installed on the output shaft of the second motor (312). The threaded rod extends into the limit card slot and is threadedly connected to the installation seat (32).

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