A directional blasting device and method for metal mining

Abstract

This invention provides a directional blasting device for metal mining, comprising a first tube and a second tube. A rotating ring is mounted on the top surface of the first tube, and a snap-fit ​​ring is mounted on the top surface of the second tube. A rotating rod is fixedly connected to the lower surface of the rotating ring, and the bottom of the rotating rod extends into the first tube and is fitted with a rotating disk. A positioning component is provided in the upper part of the first tube, and splicing components are provided at the bottom of both the first and second tubes. A lubrication component is provided on the outer surface of the storage cavity within the second tube. This invention also discloses a method for directional blasting in metal mining. By using the positioning component and controlling the distance between the first tube and the inner wall of the borehole, this invention controls the gas in the expansion bladder. The expansion bladder positions the first tube at a suitable location within the borehole, allowing the blasting device to be fixed at any position within the borehole. This improves the accuracy of blasting in metal mines and reduces the operating cost of the blasting device.

Description

Technical Field

[0001] This invention relates to the field of metal mining technology, specifically to a directional blasting device and method for metal mining. Background Technology

[0002] Directional blasting is a blasting technique that uses the explosive force of explosives to throw earth and rock from a certain area to a designated area and roughly pile them into the desired shape. It is mainly used in metal mining, dam construction, road construction, and land leveling. It is particularly suitable for work sites with labor shortages, inconvenient transportation, and no construction site. In metal mining, explosives are often used to blast the mine.

[0003] Chinese patent discloses a blasting device for limestone mines (CN112161536B), including an initiator, a charge assembly, explosives, an initiator, a detonating wire, and a delay device. The charge assembly includes several explosive units and a sealing and separating assembly disposed between adjacent explosive units. Each explosive unit includes an explosive tube and an expansion tube. Each explosive tube contains a set of explosives and a delay device. The expansion tube is filled with a solid agent. The sealing and separating assembly is disposed on the expansion tube and includes a sealing valve and a fusible connector. At room temperature, the fusible connector keeps the sealing valve normally open. When the fusible connector is heated, it melts, and the sealing valve seals the inner opening of the expansion tube. The molten fusible connector... The invention, by fusing with a solid agent to expand the expansion tube and seal the blast hole, includes the following steps: arranging blast holes, assembling the explosive tube assembly, spaced loading of explosives, and detonation of the explosive. This invention can improve the assembly efficiency of the blasting device and quickly achieve blast hole filling. Currently, in the control of the position of directional blasting devices, the personnel drilling and installing the directional blasting device are technicians from different trades. Since the installers do not have a full understanding of the accurate depth of the hole during installation and rely on their own experience to install the directional blasting device, the position of the blasting device in the hole is easily inaccurate when the depth of the hole cannot be accurately determined, resulting in errors during blasting. Therefore, this invention provides a directional blasting device and method for metal mining. Summary of the Invention

[0004] To address the problem that current positioning blasting devices are difficult to fix in place during installation, leading to blasting errors, this invention provides a directional blasting device and method for metal mining.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A directional blasting device for metal mining includes a first tube, a second tube, and a vertically arranged rotating rod. Both the first and second tubes have storage cavities containing explosives. A rotating ring is mounted on the top surface of the first tube, and a snap-fit ​​ring is mounted on the top surface of the second tube. The lower surface of the rotating ring is fixedly connected to the top end of the rotating rod. The bottom of the rotating rod extends into the first tube, and a rotating disk is mounted on the bottom of the rotating rod. A positioning assembly is located in the upper part of the first tube. Splicing assemblies are located at the bottom of both the first and second tubes. A lubrication assembly is located on the outer surface of the storage cavity within the second tube.

[0007] The positioning assembly includes a piston tube, a connecting tube, an annular fixing plate, an annular inflatable airbag, and a connecting rod. A support plate and a baffle are fixedly installed on the inner wall of the first tube, with the baffle located above the support plate and the storage cavity inside the first tube located below the support plate. The piston tube, connecting tube, annular fixing plate, annular inflatable airbag, and connecting rod are all disposed between the support plate and the baffle. The annular fixing plate is coaxial with the first tube, and the annular inflatable airbag is fitted over the annular fixing plate and located between the outer side of the annular fixing plate and the inner wall of the first tube. The piston tube is horizontally positioned, with its bottom fixedly mounted on the support plate. One end of the connecting tube passes through the outer wall of the piston tube and... The connecting pipe communicates with the piston tube, and the other end of the connecting pipe passes through the annular fixing plate and communicates with the annular expansion bladder. A one-way valve is fixedly installed on the connecting pipe. Multiple slots are evenly distributed along the circumferential direction on the upper part of the first tube body, allowing the annular expansion bladder to partially extend out of the first tube body. A piston plate is slidably installed on the inner wall of the piston tube, and an mounting plate is fixedly installed on the side wall of the piston plate. One end of the connecting rod is hinged to the mounting plate. A rotating rod inside the first tube body passes through a baffle and rotates with the baffle. A rotating disk inside the first tube body is located between the baffle and the bearing plate. The other end of the connecting rod extends to the outside of the piston tube and is rotatably connected to the bottom off-center part of the rotating disk through a rotating shaft.

[0008] In a preferred embodiment of the present invention, the positioning assembly further includes a movable disc, ratchet teeth, a connecting spring, a fixing block, and a ratchet ring; the movable disc is fixedly sleeved on the rotating rod and located between the bottom of the rotating ring and the baffle; the upper surface of the movable disc is rotatably mounted with ratchet teeth via a rotating shaft; the fixing block is fixedly mounted on the upper surface of the movable disc and located on one side of the ratchet teeth; one end of the connecting spring is fixedly connected to the side wall of the ratchet teeth, and the other end of the connecting spring is fixedly connected to the fixing block; the ratchet ring is fixedly mounted on the inner wall of the first tube body and near the top; and the ratchet teeth mesh with the ratchet ring.

[0009] As a preferred embodiment of the present invention, the splicing component includes an embedding block, the top of which is fixedly connected to the bottom of the corresponding first tube or second tube, a limiting block is fixedly installed on the outer surface of the embedding block, and a snap-fit ​​groove is provided on the outer wall of the snap-fit ​​ring for the limiting block to snap into.

[0010] In a preferred embodiment of the present invention, the center of the embedded block is provided with a mounting hole in the vertical direction, and a telescopic spring, a truncated cone protrusion, and a top post are installed in the mounting hole; one end of the telescopic spring is fixedly connected to the top of the mounting hole, and the other end of the telescopic spring is fixedly connected to the top of the truncated cone protrusion, the truncated cone protrusion being smaller at the top and larger at the bottom, the top of the top post being fixed to the bottom of the truncated cone protrusion, and the bottom of the top post extending downward out of the mounting hole.

[0011] In a preferred embodiment of the present invention, a guide hole is provided on the side wall of the embedded block, the guide hole communicating with the mounting hole, and a spring rod, a slip ring, and a limiting rod are installed in the guide hole; the limiting rod is fixedly disposed on the inner wall of the guide hole, and a limiting groove is provided on the slip ring, the limiting rod being engaged with the limiting groove on the slip ring, the slip ring slidingly engaging with the guide hole and the limiting rod, the spring rod passing through the central hole of the slip ring, one end of the spring rod extending to the outside of the guide hole of the embedded block, and the other end of the spring rod contacting the outer inclined surface of the truncated cone protrusion, and a positioning hole is provided on the outer wall of the snap ring for inserting one end of the spring rod.

[0012] As a preferred embodiment of the present invention, the snap-fit ​​groove is an L-shaped groove composed of an axial groove arranged axially along the side wall of the snap-fit ​​ring and a radial groove arranged radially.

[0013] In a preferred embodiment of the present invention, the lubrication assembly includes an oil reservoir pipe, which is sleeved outside the storage cavity. An oil injection pipe and an oil outlet pipe are connected and installed on the outer surface of the oil reservoir pipe. One end of the oil injection pipe and the oil outlet pipe extends to the outside of the second pipe body. An air inlet pipe is connected and installed on the outer surface of the oil reservoir pipe.

[0014] In a preferred embodiment of the present invention, a rectangular hole is provided at the center of the bottom of the top of the second tube and the snap ring thereon. A shaft pin is fixedly installed in the rectangular hole, and a slanted rotating rod is sleeved in the middle of the shaft pin. The slanted rotating rod is rotatably engaged with the shaft pin. Torsion springs are respectively sleeved on the shaft pin and on both sides of the slanted rotating rod. One end of the torsion spring is fixed to the wall of the rectangular hole, and the other end of the torsion spring is fixed to the slanted rotating rod. One end of the slanted rotating rod is inclined upward, and the other end of the slanted rotating rod is inclined downward and extends into the second tube. The other end of the slanted rotating rod is fixedly connected to one end of a pull rope. A transmission wheel is rotatably installed on the inner wall of the second tube via a rotating shaft. A mounting bracket is provided on the inner wall of the second tube near the air inlet end of the air inlet pipe. A sealing plate is provided in the mounting bracket to seal the air inlet end of the air inlet pipe. The other end of the pull rope passes around the transmission wheel and the mounting bracket and is fixedly connected to the top of the sealing plate. The sealing plate and the mounting bracket are slidably engaged in the vertical direction. The air inlet end of the air inlet pipe extends into the mounting bracket and is in contact with the sealing plate.

[0015] A method for directional blasting in metal mining, the method employing the aforementioned blasting drilling device for mining, the method comprising the following steps;

[0016] S1. Insert the embedding block below one second tube into the snap ring above another second tube. Move the limiting block to the bottom of the snap groove, and then rotate the first second tube to fix the limiting block to the snap groove. When the embedding block descends, the top column will drive the conical protrusion to rise, and the telescopic spring will be compressed. As the conical protrusion moves upward, the outer inclined surface of the conical protrusion will squeeze one end of the spring rod. Since the other end of the spring rod is blocked by the inner wall of the snap ring, the spring rod will retract. When the limiting block is inserted along the axial groove and rotated along the radial groove, the other end of the spring rod is aligned with the positioning hole on the snap ring. At this time, the other end of the spring rod will protrude from the positioning hole, thereby connecting the two second tubes together. Continue to connect the subsequent second tubes in the same way, and finally connect the first tubes in the same way, so that the total length of all the connected tubes reaches the specified length.

[0017] S2. When the insert block on the previous second tube or the first tube is inserted into the snap ring of the next second tube, the insert block presses on the upper end of the inclined rotating rod in the next second tube. The inclined rotating rod rotates on the shaft pin. The other end of the inclined rotating rod is gradually raised as the insert block is inserted, thereby pulling the pull rope. The pull rope pulls the sealing plate and makes the sealing plate rise. When the sealing plate loses its seal on the air inlet pipe, the lubricating oil in the oil storage pipe will flow to the outer surface of the second tube through the oil outlet pipe, reducing the friction between the second tube and the inner wall of the hole when the second tube moves in the hole.

[0018] S3. After assembling the first and second pipe bodies, insert them into the pre-drilled hole in the mine. Fix the top of the first pipe body with your hand or a clamp. The groove of the first pipe body is located in the pre-drilled hole. Then rotate the rotating ring on the first pipe body. As the rotating ring rotates, it will drive the rotating rod to rotate. At this time, the rotating rod will drive the movable disk to rotate, and at the same time, it will drive the rotating disk to rotate. When the movable disk rotates, it will drive the ratchet to rotate in the ratchet ring. Thus, under the limitation of the ratchet ring, the rotating ring can only rotate in one direction.

[0019] S4. When the rotating disk rotates, the connecting rod will drive the piston plate to move back and forth in the piston tube through the rotating shaft, thereby transporting the gas in the piston tube to the annular expansion bladder through the connecting pipe. As the gas in the annular expansion bladder increases, it will gradually expand. The part of the annular expansion bladder corresponding to the slot will expand out of the slot and gradually get stuck on the inner wall of the drilled hole. According to the distance between the first tube and the inner wall of the hole, the gas in the annular expansion bladder is controlled, thereby placing the first tube in the appropriate position in the hole through the annular expansion bladder, and thus accurately controlling the position of the entire directional blasting device for metal mining in the drilled hole.

[0020] S5. Perform directional blasting operation.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] 1. This invention includes a positioning component. As the rotating ring rotates, it drives the rotating rod to rotate, which in turn drives the movable disk to rotate. Simultaneously, the rotating disk rotates, causing the ratchet to rotate within the ratchet ring. This ratchet ring limits the rotation of the rotating ring to one direction only. The rotating disk's rotation, via the rotating shaft, causes the connecting rod to move the piston plate back and forth within the piston tube, thus transporting the gas from the piston tube to the expansion bladder through the connecting pipe. As the gas in the expansion bladder increases, it gradually expands and then expands out of the slot. The gas in the expansion bladder is controlled according to the distance between the first tube and the inner wall of the hole, allowing the first tube to be positioned appropriately within the hole. This facilitates adjustment of the blasting device according to the hole size, enabling the blasting device to be fixed at any position within the hole. This improves the accuracy of blasting in metal mines, and the lower cost of the bladder results in lower operating costs for the blasting device, achieving cost savings. Furthermore, installation is relatively convenient.

[0023] 2. This invention includes a splicing assembly. An insert block at the bottom of one second tube is inserted into a snap-fit ​​ring at the top of another second tube. A limiting block is moved to the bottom of the snap-fit ​​groove. Then, the second tube is rotated to fix the limiting block to the snap-fit ​​groove. As the insert block descends, the top column drives the truncated cone protrusion to rise. As the truncated cone protrusion moves upward, it compresses one end of the spring rod. Because the other end of the spring rod is blocked by the inner wall of the snap-fit ​​ring, one end of the spring rod retracts. After the limiting block moves, the other end of the spring rod aligns with the positioning hole on the snap-fit ​​ring. At this time, the other end of the spring rod pops out from the positioning hole, thus connecting the two tubes together. The same method is used to connect the subsequent second tubes. Finally, the same method is used to connect the first tube, making the total length of the tubes reach a suitable length. Then, the connected tubes are inserted into the mine's borehole for easy fixing of the blasting device. Since the tubes are of the same length, the depth inside the borehole can be determined by the number of tubes, further determining the position of the blasting device and improving blasting accuracy.

[0024] 3. The present invention is equipped with a lubrication component. During the process of inserting the embedding block into the snap ring, the embedding block presses on the upper end of the inclined rotating rod in the next second tube. The inclined rotating rod rotates on the shaft pin. The other end of the inclined rotating rod is gradually raised as the embedding block is inserted, thereby pulling the pull rope. The pull rope pulls the sealing plate and raises the sealing plate. When the sealing plate loses its seal on the air inlet pipe, the lubricating oil in the oil storage pipe will flow to the outer surface of the second tube through the oil outlet pipe, reducing the friction between the second tube and the inner wall of the hole when it moves in the hole. At the same time, the lubricating oil in the oil storage pipe can isolate the explosive and prevent the explosive from hardening in the later stage, which would render the explosive unusable. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of a directional blasting device for metal mining.

[0026] Figure 2 This is a schematic diagram of the internal structure of a directional blasting device for metal mining.

[0027] Figure 3 This is an exploded structural diagram of the first tube body and the rotating ring;

[0028] Figure 4 yes Figure 2 A magnified structural diagram of point A in the middle;

[0029] Figure 5 yes Figure 3 A magnified structural diagram of point C in the middle;

[0030] Figure 6 This is a schematic diagram of the exploded structure of the splicing components;

[0031] Figure 7 This is a cross-sectional view of the embedded block;

[0032] Figure 8 This is a schematic diagram of the structure where the snap-fit ​​ring is installed on the second pipe body;

[0033] Figure 9 This is a schematic diagram of a structure in which a pin, a torsion spring, and a slanted rotating rod are installed inside a rectangular hole.

[0034] Figure 10 yes Figure 2 A magnified structural diagram of section B.

[0035] In the diagram, 1—first tube body; 2—joining assembly; 21—embedded block; 22—limiting block; 23—telescopic spring; 24—conical protrusion; 25—top column; 26—spring rod; 27—slip ring; 28—limiting rod; 29—mounting hole; 192—guide hole; 3—second tube body; 31—rotating ring; 32—clamping ring; 4—clamping groove; 41—axial groove; 42—radial groove; 5—lubrication assembly; 51—oil reservoir pipe; 52—oil injection pipe; 53—oil outlet pipe; 54—slanted rotating rod; 55—pull rope; 56—transmission wheel; 5 7—Mounting bracket; 58—Sealing plate; 59—Inlet pipe; 6—Positioning assembly; 61—Piston pipe; 62—Connecting pipe; 63—Annular fixing plate; 64—Annular expansion airbag; 65—Piston plate; 66—Mounting plate; 67—Connecting rod; 68—Rotating disk; 7—Storage cavity; 8—Bearing plate; 9—Baffle; 10—Ratchet ring; 11—Rotating rod; 12—Movable disk; 13—Ratchet; 14—Connecting spring; 15—Fixing block; 16—Window; 17—Positioning hole; 18—Rectangular hole; 19—Shaft pin; 20—Torsion spring. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0037] like Figure 1 and Figure 2 As shown, a directional blasting device for metal mining includes a first tube 1, a second tube 3, and a vertically arranged rotating rod 11. Both the first tube 1 and the second tube 3 have storage cavities 7, which contain explosives. A rotating ring 31 is mounted on the top surface of the first tube 1, and a snap-fit ​​ring 32 is mounted on the top surface of the second tube 3. The lower surface of the rotating ring 31 is fixedly connected to the top end of the rotating rod 11, as shown. Figure 3 As shown, the bottom of the rotating rod 11 extends into the first tube 1, and a rotating disk 68 is installed at the bottom of the rotating rod 11. A positioning assembly 6 is provided at the upper part of the first tube 1, and splicing assemblies 2 are provided at the bottom of both the first tube 1 and the second tube 3. A lubrication assembly 5 is provided on the outer surface of the storage cavity 7 inside the second tube 3. Figure 2 As shown.

[0038] The positioning assembly 6 includes a piston tube 61, a connecting tube 62, an annular fixing plate 63, an annular expansion airbag 64, a connecting rod 67, a movable disc 12, a ratchet 13, a connecting spring 14, a fixing block 15, and a ratchet ring 10, as shown below. Figure 3 , Figure 4 and Figure 5 As shown. A support plate 8 and a baffle 9 are fixedly installed on the inner wall of the first tube 1. The baffle 9 is located above the support plate 8, and the storage cavity 7 inside the first tube 1 is located below the support plate 8. The piston tube 61, connecting tube 62, annular fixing plate 63, annular expansion airbag 64, and connecting rod 67 are all arranged between the support plate 8 and the baffle 9. The annular fixing plate 63 is coaxial with the first tube 1. The annular expansion airbag 64 is sleeved on the annular fixing plate 63 and is located between the outer side of the annular fixing plate 63 and the inner wall of the first tube 1. The piston tube 61 is horizontally arranged (i.e., the axis of the piston tube 61 is horizontal). The bottom of the piston tube 61 is fixedly installed on the support plate 8. The connecting tube 62 is arranged between the piston tube 61 and the annular fixing plate 63. One end of the connecting tube 62 passes through the outer wall of the piston tube 61 and communicates with the inside of the piston tube 61. The other end of the connecting tube 62 passes through the annular fixing plate 63 and communicates with the inside of the annular expansion airbag 64. A one-way valve is fixedly installed on the connecting tube 62. The upper part of the first tube 1 is evenly provided with multiple slots 16 along the circumferential direction, which allow the annular inflatable airbag 64 to partially extend out of the first tube 1. In this embodiment, the slots 16 outside the first tube 1 are set in four groups. A piston plate 65 is slidably installed on the inner wall of the piston tube 61, and an mounting plate 66 is fixedly installed on the side wall of the piston plate 65. One end of the connecting rod 67 is hinged to the mounting plate 66. The rotating rod 11 inside the first tube 1 passes through the baffle 9 and rotates with the baffle 9. The rotating disk 68 inside the first tube 1 is located between the baffle 9 and the bearing plate 8. The other end of the connecting rod 67 extends to the outside of the piston tube 61 and is rotatably connected to the bottom off-center part of the rotating disk 68 through a rotating shaft. When the rotating disk 68 rotates, it drives the piston plate 65 to slide horizontally back and forth inside the piston tube 61 through the connecting rod 67. The movable disc 12 is fixedly sleeved on the rotating rod 11 and located between the bottom of the rotating ring 31 and the baffle 9. The upper surface of the movable disc 12 is rotatably mounted with a ratchet 13 via a rotating shaft. The fixed block 15 is fixedly mounted on the upper surface of the movable disc 12 and located on one side of the ratchet 13. One end of the connecting spring 14 is fixedly connected to the side wall of the ratchet 13, and the other end of the connecting spring 14 is fixedly connected to the fixed block 15. The ratchet ring 10 is fixedly mounted on the inner wall of the first tube 1 and near the top. The ratchet 13 meshes with the ratchet ring 10.

[0039] The splicing component 2 includes an embedded block 21, such as Figure 6As shown, the top of the embedded block 21 is fixedly connected to the bottom of the corresponding first tube 1 or second tube 3. A limiting block 22 is fixedly installed on the outer surface of the embedded block 21. A snap-fit ​​groove 4 is provided on the outer wall of the snap-fit ​​ring 32 for the limiting block 22 to snap into. In this embodiment, the limiting block 22 and the snap-fit ​​groove 4 are both symmetrically arranged in two sets. The center of the embedded block 21 is provided with a mounting hole 29 in the vertical direction, such as... Figure 7 As shown, a telescopic spring 23, a truncated cone protrusion 24, and a top post 25 are installed in the mounting hole 29. One end of the telescopic spring 23 is fixedly connected to the top of the mounting hole, and the other end of the telescopic spring 23 is fixedly connected to the top of the truncated cone protrusion 24. The truncated cone protrusion 24 is smaller at the top and larger at the bottom. The top of the top post 25 is fixed to the bottom of the truncated cone protrusion 24, and the bottom of the top post 25 extends downward out of the mounting hole 29. A guide hole 291 is provided on the side wall of the embedded block 21. The guide hole 291 communicates with the mounting hole 29. A spring rod 26, a slip ring 27, and a limiting rod 28 are installed in the guide hole 291. The limiting rod 28 is fixedly set on the inner wall of the guide hole 291. The axis of the limiting rod 28 is parallel to the axis of the guide hole 291. A limiting groove is provided on the slip ring 27. The limiting rod 28 is locked in the limiting groove on the slip ring 27. The slip ring 27 slides in cooperation with the guide hole and the limiting rod 28. The spring rod 26 passes through the center hole of the slip ring 27. One end of the spring rod 26 extends to the outside of the guide hole 291 of the embedded block 21. The other end of the spring rod 26 contacts the outer inclined surface of the conical protrusion 24. A positioning hole 17 is provided on the outer wall of the snap ring 32 for inserting one end of the spring rod 26.

[0040] The snap-fit ​​groove 4 is an L-shaped groove composed of an axial groove 41 arranged axially along the side wall of the snap-fit ​​ring 32 and a radial groove 42 arranged radially. Figure 8 As shown, when the insert block 21 is inserted into the snap ring 32, the limiting blocks 22 on both sides of the insert block 21 are aligned with the axial grooves 41 on both sides of the snap ring 32. Then, it is inserted into the bottom of the axial groove 41 and rotated a distance along the radial groove 42. Because the upper wall of the radial groove 42 acts as a blocking force on the limiting block 22 in the axial direction, the insert block 21 is prevented from exiting the snap ring 32.

[0041] Lubrication assembly 5 includes an oil reservoir 51, which is sleeved outside the storage cavity 7. An oil injection pipe 52 and an oil outlet pipe 53 are connected and installed on the outer surface of the oil reservoir 51. Figure 2 As shown, one end of the oil inlet pipe 52 and the oil outlet pipe 53 extends to the outside of the second pipe body 3. An air inlet pipe 59 is installed on the outer surface of the oil storage pipe 51. A one-way valve is installed on the air inlet pipe 59. This one-way valve only allows gas to enter the oil storage pipe 51 through the air inlet pipe 59, while the lubricating fluid in the oil storage pipe 51 cannot flow out through the one-way valve. A rectangular hole 18 is provided at the center of the bottom of the top of the second pipe body 3 and the bottom of the snap ring 32 thereon. Figure 8 and Figure 9As shown, a pin 19 is fixedly installed inside the rectangular hole 18. A slanted rotating rod 54 is sleeved in the middle of the pin 19. The slanted rotating rod 54 is rotatably engaged with the pin 19. Torsion springs 20 are respectively sleeved on the pin 19 and on both sides of the slanted rotating rod 54. One end of the torsion spring 20 is fixed to the hole wall of the rectangular hole 18, and the other end of the torsion spring 20 is fixed to the slanted rotating rod 54. One end of the slanted rotating rod 54 is inclined upward, and the other end of the slanted rotating rod 54 is inclined downward and extends into the second tube 3. The other end of the slanted rotating rod 54 is fixedly connected to one end of the pull rope 55. When the slanted rotating rod 54 is rotated, the bottom end of the slanted rotating rod 54 will be lifted, and the pull rope 55 will be pulled up. A drive wheel 56 is rotatably mounted on the inner wall of the second pipe body 3 via a rotating shaft. A mounting bracket 57 is located on the inner wall of the second pipe body 3 near the air inlet end of the air inlet pipe 59. A sealing plate 58 is installed inside the mounting bracket 57 to seal the air inlet end of the air inlet pipe 59. The other end of a pull rope 55 passes around the drive wheel 56 and the mounting bracket 57 and is fixedly connected to the top of the sealing plate 58. The sealing plate 58 and the mounting bracket 57 slide in the vertical direction. The air inlet end of the air inlet pipe 59 extends into the mounting bracket 57 and fits against the sealing plate 58. Figure 10 As shown, the sealing plate 58 can be made of rubber. When the rubber plate is inserted into the mounting bracket 57, it has a good sealing effect on the air intake end of the air intake pipe 59.

[0042] A method for directional blasting in metal mining, the method employing the aforementioned directional blasting device for metal mining, the method comprising the following steps;

[0043] S1. Insert the embedding block 21 below one second tube 3 into the snap ring 32 above another second tube 3, move the limiting block 22 to the bottom of the snap groove 4, and then rotate the first second tube 3 to fix the limiting block 22 to the snap groove 4. When the embedding block 21 descends, the top column 25 will drive the conical protrusion 24 to rise, and the telescopic spring 23 will be compressed. As the conical protrusion 24 moves upward, the outer inclined surface of the conical protrusion 24 will squeeze one end of the spring rod 26. Because the other end of the spring rod 26 is squeezed... The inner wall of the retaining ring 32 blocks the spring rod 26, causing it to retract. When the limiting block 22 is inserted along the axial groove 41 and rotates along the radial groove 42, the other end of the spring rod 26 aligns with the positioning hole 17 on the retaining ring 32. At this time, the other end of the spring rod 26 extends out of the positioning hole 17, thereby connecting the two second tubes 3 together. The same method is used to continue connecting the subsequent second tubes 3. Finally, the same method is used to connect the first tube 1, so that the total length of all the connected tubes reaches the specified length.

[0044] S2. When the inserting block 21 on the previous second tube 3 or the first tube 1 is inserted into the snap ring 32 of the next second tube 3, the inserting block 21 presses against the upper end of the inclined rotating rod 54 in the next second tube 3. The inclined rotating rod 54 rotates on the shaft pin 19. The bottom end of the inclined rotating rod 54 is gradually raised as the inserting block 21 is inserted, thereby pulling the pull rope 55. The pull rope 55 pulls the sealing plate 58 and raises the sealing plate 58. When the sealing plate 58 loses its seal on the air inlet pipe 59, the lubricating oil in the oil storage pipe 51 will flow to the outer surface of the second tube 3 through the oil outlet pipe 53, reducing the friction between the second tube 3 and the inner wall of the hole when it moves in the hole.

[0045] S3. After assembling the first tube 1 and the second tube 3, insert them into the pre-drilled hole in the mine. Fix the top of the first tube 1 with your hand or a clamp. The slot 16 of the first tube 1 is located in the pre-drilled hole. Then rotate the rotating ring 31 on the first tube 1. As the rotating ring 31 rotates, it will drive the rotating rod 11 to rotate. At this time, the rotating rod 11 will drive the movable disk 12 to rotate, and at the same time, it will drive the rotating disk 68 to rotate. When the movable disk 12 rotates, it will drive the ratchet 13 to rotate in the ratchet ring 10. Thus, under the limitation of the ratchet ring 10, the rotating ring 31 can only rotate in one direction.

[0046] S4. When the rotating disk 68 rotates, the connecting rod 67 will drive the piston plate 65 to slide back and forth in the piston tube 61 through the rotating shaft, thereby transporting the gas in the piston tube 61 to the annular expansion bladder 64 through the connecting pipe 62. As the gas in the annular expansion bladder 64 increases, it will gradually expand. The part of the annular expansion bladder 64 corresponding to the slot 16 expands out from the slot 16 and gradually gets stuck on the inner wall of the drilled hole. According to the distance between the first tube 1 and the inner wall of the hole, the gas in the annular expansion bladder 64 is controlled, thereby placing the first tube 1 in the appropriate position in the hole through the annular expansion bladder 64, and thus accurately controlling the position of the entire directional blasting device for metal mining in the drilled hole.

[0047] S5. Perform directional blasting operation.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A metal mine exploitation directional blasting device, comprising a first pipe body (1) and a second pipe body (3), a storage cavity (7) is arranged in the first pipe body (1) and the second pipe body (3), and an explosive is arranged in the storage cavity (7), characterized in that, Also include vertical setting of the rotating rod (11), the top surface of the first pipe body (1) is installed with rotating ring (31), the top surface of the second pipe body (3) is installed with clamping ring (32), the lower surface of the rotating ring (31) is fixedly connected with the top end of the rotating rod (11), the bottom of the rotating rod (11) extends into the first pipe body (1), the bottom of the rotating rod (11) is installed with rotating disc (68), the upper part of the first pipe body (1) is provided with positioning assembly (6), the bottom of the first pipe body (1) and the second pipe body (3) is provided with splicing assembly (2), the outer surface of the storage cavity (7) in the second pipe body (3) is provided with lubricating assembly (5); The positioning assembly (6) includes piston tube (61), connecting tube (62), annular fixed plate (63), annular inflatable air bag (64) and connecting rod (67); The inner wall of the first pipe body (1) is fixedly installed with bearing plate (8) and baffle (9), the baffle (9) is located above the bearing plate (8), the storage cavity (7) in the first pipe body (1) is located below the bearing plate (8); The piston tube (61), the connecting tube (62), the annular fixed plate (63), the annular inflatable air bag (64) and the connecting rod (67) are all arranged between the bearing plate (8) and the baffle (9), the annular fixed plate (63) is coaxially arranged with the first pipe body (1), the annular inflatable air bag (64) is sleeved outside the annular fixed plate (63) and located between the outer side of the annular fixed plate (63) and the inner wall of the first pipe body (1); The piston tube (61) is horizontally arranged, the bottom of the piston tube (61) is fixedly arranged on the bearing plate (8), one end of the connecting tube (62) penetrates through the outer side wall of the piston tube (61) and communicates with the inside of the piston tube (61), the other end of the connecting tube (62) penetrates through the annular fixed plate (63) and communicates with the inside of the annular inflatable air bag (64), a one-way valve is fixedly installed on the connecting tube (62), a plurality of notches (16) for the annular inflatable air bag (64) to locally extend outside the first pipe body (1) are uniformly arranged in the circumferential direction of the upper part of the first pipe body (1); A piston plate (65) is slidably installed on the inner wall of the piston tube (61), an installation plate (66) is fixedly installed on the side wall of the piston plate (65), one end of the connecting rod (67) is hingedly connected with the installation plate (66), the rotating rod (11) in the first pipe body (1) penetrates through the baffle (9) and rotationally cooperates with the baffle (9), the rotating disc (68) in the first pipe body (1) is located between the baffle (9) and the bearing plate (8), the other end of the connecting rod (67) extends to the outside of the piston tube (61) and is rotationally connected with the bottom of the rotating disc (68) through a rotating shaft.

2. The metal mine extraction directional blasting device according to claim 1, characterized in that, The positioning assembly (6) further comprises a movable disc (12), a ratchet (13), a connecting spring (14), a fixed block (15) and a ratchet ring (10); the movable disc (12) is fixedly sleeved on the rotating rod (11) and located between the bottom of the rotating ring (31) and the baffle (9), the upper surface of the movable disc (12) is rotatably provided with the ratchet (13) through a rotating shaft, the fixed block (15) is fixedly installed on the upper surface of the movable disc (12) and located on one side of the ratchet (13), one end of the connecting spring (14) is fixedly connected to the side wall of the ratchet (13), the other end of the connecting spring (14) is fixedly connected to the fixed block (15), and the ratchet ring (10) is fixedly installed on the inner wall of the first pipe body (1) and close to the top.

3. The metal mine extraction directional blasting device according to claim 2, characterized in that, The splicing assembly (2) comprises an embedded block (21), the top of the embedded block (21) is fixedly connected with the bottom of the corresponding first pipe body (1) or second pipe body (3), and the outer surface of the embedded block (21) is fixedly installed with a limiting block (22); and the outer wall of the clamping ring (32) is provided with a clamping groove (4) for clamping the limiting block (22).

4. The metal mine extraction directional blasting device according to claim 3, characterized in that, A mounting hole (29) is arranged at the central part of the embedded block (21) in the vertical direction, and a telescopic spring (23), a conical frustum protrusion (24) and a top column (25) are installed in the mounting hole (29); one end of the telescopic spring (23) is fixedly connected to the top of the mounting hole, and the other end of the telescopic spring (23) is fixedly connected to the top of the conical frustum protrusion (24); the conical frustum protrusion (24) is small at the top and large at the bottom; the top of the top column (25) is fixed to the bottom of the conical frustum protrusion (24), and the bottom of the top column (25) extends out of the mounting hole (29).

5. The metal mine extraction directional blasting device according to claim 4, characterized in that, A guide hole (291) is arranged on the side wall of the embedded block (21), the guide hole (291) is communicated with the mounting hole (29), and a spring rod (26), a sliding ring (27) and a limiting rod (28) are installed in the guide hole (291); the limiting rod (28) is fixedly arranged on the inner wall of the guide hole (291), the sliding ring (27) is provided with a limiting groove, the limiting rod (28) is clamped on the limiting groove on the sliding ring (27), the sliding ring (27) is in sliding fit with the guide hole and the limiting rod (28), the spring rod (26) penetrates through the center hole of the sliding ring (27), one end of the spring rod (26) extends to the outside of the guide hole (291) of the embedded block (21), and the other end of the spring rod (26) is in contact with the inclined surface on the outer side of the conical frustum protrusion (24); and the outer wall of the clamping ring (32) is provided with a positioning hole (17) for inserting one end of the spring rod (26).

6. The metal mine extraction directional blasting device according to claim 5, characterized in that, The clamping groove (4) is an L-shaped structure groove composed of an axial groove (41) arranged axially along the side wall of the clamping ring (32) and a radial groove (42) arranged radially.

7. The metal mine extraction directional blasting device according to claim 6, characterized in that, The lubricating assembly (5) comprises an oil storage pipe (51) sleeved outside the storage cavity (7), an oil injection pipe (52) and an oil outlet pipe (53) are communicated and installed on the outer surface of the oil storage pipe (51), one end of the oil injection pipe (52) and the oil outlet pipe (53) extends to the outside of the second pipe body (3), and an air inlet pipe (59) is communicated and installed on the outer surface of the oil storage pipe (51).

8. The metal mine extraction directional blasting device according to claim 7, characterized in that, The top of the second pipe body (3) and the bottom center of the clamping ring (32) thereon are provided with a rectangular hole (18), an axle pin (19) is fixedly arranged in the rectangular hole (18), a slanting rotating rod (54) is sleeved on the middle part of the axle pin (19), the slanting rotating rod (54) is rotationally matched with the axle pin (19), torsion springs (20) are respectively sleeved on the axle pin (19) and located on the two sides of the slanting rotating rod (54), one end of the torsion spring (20) is fixed on the hole wall of the rectangular hole (18), the other end of the torsion spring (20) is fixed on the slanting rotating rod (54), one end of the slanting rotating rod (54) is obliquely upward, the other end of the slanting rotating rod (54) obliquely downward extends into the second pipe body (3), the other end of the slanting rotating rod (54) is fixedly connected with one end of a pull rope (55), a transmission wheel (56) is rotationally installed on the inner wall of the second pipe body (3) through a rotating shaft, an installation frame (57) is arranged on the inner wall of the second pipe body (3) and close to the air inlet end of the air inlet pipe (59), a sealing plate (58) capable of sealing the air inlet end of the air inlet pipe (59) is arranged in the installation frame (57), the other end of the pull rope (55) is fixedly connected with the top of the sealing plate (58) by bypassing the transmission wheel (56) and the installation frame (57), the sealing plate (58) and the installation frame (57) are in sliding fit in the vertical direction, and the air inlet end of the air inlet pipe (59) extends into the installation frame (57) and is attached to the sealing plate (58).

9. A method of directional blasting in a metal mine, characterized in that, The method adopts the metal mine exploitation directional blasting device of claim 8, and comprises the following steps: S1. Insert the embedded block (21) below one second pipe body (3) into the clamping ring (32) above another second pipe body (3), move the limiting block (22) to the bottom of the clamping groove (4), then rotate the upper second pipe body (3) to fix the limiting block (22) with the clamping groove (4), when the embedded block (21) is lowered, the top post (25) will drive the conical convex block (24) to rise, the extension spring (23) is compressed, with the upward movement of the conical convex block (24), the outer inclined surface of the conical convex block (24) will extrude one end of the spring rod (26), because the other end of the spring rod (26) is blocked by the inner wall of the clamping ring (32), so the spring rod (26) will shrink, when the limiting block (22) is inserted along the axial groove (41) and rotated along the radial groove (42), the other end of the spring rod (26) is aligned with the positioning hole (17) on the clamping ring (32), at this time the other end of the spring rod (26) will protrude from the positioning hole (17), thereby connecting the two second pipe bodies (3) together, the same method is used to continue connecting the following second pipe bodies (3), and finally the same method is used to connect the first pipe body (1), so that the total length of the connected pipe bodies reaches the specified length; S2. When the embedded block (21) on the upper second pipe body (3) or the first pipe body (1) is inserted into the clamping ring (32) of the next second pipe body (3), the embedded block (21) presses on the upper end of the inclined rotating rod (54) in the next second pipe body (3), the inclined rotating rod (54) rotates on the shaft pin (19), the other end of the inclined rotating rod (54) is gradually lifted with the insertion of the embedded block (21), thereby pulling the pull rope (55), the pull rope (55) pulls the sealing plate (58) and makes the sealing plate (58) rise, when the sealing plate (58) loses the sealing of the air inlet pipe (59), the lubricating oil in the oil storage pipe (51) will flow to the outer surface of the second pipe body (3) through the oil outlet pipe (53), reducing the friction between the second pipe body (3) and the inner wall of the hole when moving in the hole; S3. After the first pipe body (1) and the second pipe body (3) are combined, they are inserted into the hole drilled in the mine, the top of the first pipe body (1) is fixed by hand or clamp, the notch (16) of the first pipe body (1) is located in the drilled hole, then the rotating ring (31) on the first pipe body (1) is rotated, the rotating ring (31) will drive the rotating rod (11) to rotate, at this time the rotating rod (11) will drive the movable disc (12) to rotate, and also drive the rotating disc (68) to rotate, the movable disc (12) rotates and drives the ratchet (13) to rotate in the ratchet ring (10), so that the rotating ring (31) can only rotate in one direction under the limitation of the ratchet ring (10); S4. When the rotating disc (68) rotates, the connecting rod (67) will drive the piston plate (65) to move back and forth in the piston tube (61) through the rotating shaft, so as to transport the gas in the piston tube (61) to the annular expansion air bag (64) through the connecting tube (62). With the increase of the gas in the annular expansion air bag (64), the annular expansion air bag (64) will gradually expand and expand from the slot (16) at the corresponding position of the slot (16), and gradually clamp on the inner wall of the drilled hole. According to the distance between the first pipe body (1) and the inner wall of the hole, the gas in the annular expansion air bag (64) is controlled, so that the first pipe body (1) is placed in the hole by the annular expansion air bag (64). The appropriate position, and then accurately control the position of the whole metal mine mining directional blasting device in the drilled hole; S5. Perform directional blasting operation.

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