A spliced segmented variable diameter charging device in a blast hole

Abstract

The utility model discloses a kind of spliced hole-in segment variable-diameter charging devices, it is related to strip mining blasting field technical field, including guide cylinder, sliding groove, charging pipe assembly, top sealing assembly, clamping fixed component and tow rope;The left and right of inside of guide cylinder is opened with sliding groove, the inside of guide cylinder passes through tow rope, the inside of guide cylinder is provided with charging pipe assembly, top sealing assembly and clamping fixed component;Charging pipe assembly includes large diameter charging pipe, connecting nut interface and bottom nut interface, the upper end of large diameter charging pipe is fixedly connected with connecting nut interface, the inside of lower end of large diameter charging pipe is opened with bottom nut interface, this spliced hole-in segment variable-diameter charging device can be realized according to the different hardness coefficient of hole wall rock, adjusts charging diameter, realizes hard rock place coupling charging, can carry out the quick assembly of charging pipeline.

Description

Technical Field

[0001] This utility model relates to the technical field of open-pit blasting, specifically to a modular, segmented, variable-diameter charging device for boreholes. Background Technology

[0002] In open-pit mining, changes in rock conditions are common, resulting in the formation of soft and hard strata or interlayers. Traditional bulk explosive coupled charging methods cannot take into account the changes in lithology within the strata. Using the same linear charge density (charge mass per meter of borehole) ultimately leads to excessive fragmentation of soft rock and the formation of explosive energy release points. Most of the explosive energy in the borehole is released from the soft rock, significantly reducing the ability to break up hard rock and resulting in the problem of excessively large fragments after blasting. Existing technologies cannot adjust the charge diameter according to the different hardness coefficients of the borehole wall rock to achieve coupled charging in hard rock, and cannot quickly assemble the charging pipe. To address this, we propose a spliced ​​segmented variable diameter charging device for boreholes. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a segmented variable diameter charging device for boreholes, which can adjust the charging diameter according to the different hardness coefficients of the borehole wall rock, realize coupled charging in hard rock, and enable rapid assembly of charging pipes, thus effectively solving the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a segmented variable diameter charging device for boreholes, comprising a guide tube, a sliding groove, a charging tube assembly assembly, a top sealing assembly, a snap-fit ​​fixing assembly, and a traction rope; Guide tube: Sliding grooves are provided on the left and right sides of the inner side. The traction rope passes through the inner side of the guide tube. The inside of the guide tube is provided with a drug loading tube assembly, a top sealing assembly and a snap-fit ​​fixing assembly. The charging tube assembly includes a large-diameter charging tube, a connecting nut interface, and a bottom nut interface. The upper end of the large-diameter charging tube is fixedly connected to the connecting nut interface, and the lower end of the large-diameter charging tube has a bottom nut interface on its inner side. The top of the large-diameter charging tube is tapered.

[0005] The device achieves directional sliding of the propellant tube assembly via a sliding groove in the guide tube, with a traction rope assisting in positioning. The large-diameter propellant tube is modularly connected through a connecting nut interface and a bottom nut interface. The conical top facilitates insertion into the borehole, and the guide tube ensures linear movement of the propellant tube. The traction rope lowers the assembly to the designated depth in the borehole. The large-diameter propellant tube is used for coupled propellant loading in hard rock formations. The conical top ensures that the bulk propellant fills the tube body, and the threaded interface design simplifies the assembly process. The conical top prevents powder residue. The large-diameter tube increases the propellant loading density in hard rock formations, and the sliding groove ensures precise positioning of the assembly.

[0006] Furthermore, the loading tube assembly also includes a small-diameter loading tube, an upper threaded groove, and a lower threaded groove. The upper threaded groove is provided on the upper outer side of the small-diameter loading tube, and the lower threaded groove is provided on the lower inner side of the small-diameter loading tube. The upper threaded groove is threadedly connected to the bottom nut interface or the lower threaded groove at the lower end of another small-diameter loading tube. The connecting nut interface is threadedly connected to the lower threaded groove or the bottom nut interface on the lower side of another large-diameter loading tube.

[0007] Small-diameter charging tubes are flexibly connected to large-diameter charging tubes or other small-diameter tubes via upper and lower threaded grooves, forming variable-diameter combinations. Large-diameter tubes are spliced ​​with small-diameter tubes or another large-diameter tube via connecting nut interfaces. Based on rock hardness data, large-diameter tubes and small-diameter tubes are alternately spliced: large-diameter tubes are used in hard rock sections with coupled charging to enhance breaking force, while small-diameter tubes are used in soft rock sections with uncoupled charging to reduce energy leakage. Threaded splicing achieves segmented variable diameter. Modular design adapts to differences in soft and hard rock layers; standardized interfaces ensure sealing; threaded connections provide a stable structure; multiple specifications of charging tubes adapt to different blasting needs; and modular design enhances scalability.

[0008] Furthermore, the charging tube assembly also includes a bottom sealing cap and an initiating charge, the inner side of the bottom nut interface is threadedly connected to the bottom sealing cap, and the initiating charge is placed inside the large-diameter charging tube or the small-diameter charging tube.

[0009] The bottom sealing cap is screwed into the bottom nut interface to seal the charging tube. The detonating charge can be freely placed in tubes of different diameters. The sealing cap seals the bottom of the tube to prevent leakage. The detonating charge is placed in the hard rock section of the tube according to the lithology. The detonating charge is detonated first. The sealing cap prevents the explosive from leaking. The detonating charge can be flexibly configured to meet the needs of segmented detonation. The bottom seal prevents powder leakage. The detonation point can be flexibly set to optimize the hard rock breaking effect.

[0010] Furthermore, the top sealing assembly includes a wedge-shaped mounting cap, a wedge-shaped connecting groove, a flexible wall-mounting ring, and a detonator lead wire threading hole. The wedge-shaped mounting cap has a wedge-shaped connecting groove on its inner side, a detonator lead wire threading hole in the middle of its upper end, and a flexible wall-mounting ring in the upper outer side.

[0011] The ring-wedge mounting cap secures the charging tube via a ring-wedge connecting groove. A flexible wall-fitting ring conforms to the inner wall of the borehole. A detonator lead wire through-hole guides the wiring. The flexible wall-fitting ring enhances sealing, and the detonator lead wire through-hole prevents wiring tangling. The mounting cap is fixed to the top charging tube via the connecting groove. The flexible wall-fitting ring expands to conform to the borehole wall, preventing powder from entering the borehole gap. The flexible wall-fitting ring provides a double seal to prevent leakage. The detonator lead wire through-hole protects the detonator lead wire from being squeezed.

[0012] Furthermore, the top sealing assembly also includes a pipeline retaining ring, with the upper eccentric position of the ring wedge-shaped mounting cap threaded with the pipeline retaining ring.

[0013] The pipeline fixing ring is eccentrically installed to fix the detonator lead wire, preventing the detonator from falling off when pulled. The eccentric design optimizes space utilization, and the threaded connection facilitates disassembly and maintenance. The fixing ring connects the detonator and the connecting wire to ensure that the detonator can be moved using the connecting wire during installation. The eccentric design prevents the wire from getting tangled; the threaded connection facilitates inspection and replacement.

[0014] Furthermore, the snap-fit ​​fixing assembly also includes a rubber cylinder, telescopic rods, springs, an arc plate, and sliders. Two telescopic rods are fixedly connected to the left and right ends of the outer side of the rubber cylinder, and springs are sleeved on the outer side of the telescopic rods. Sliders are fixedly connected to the upper and lower ends of the inner side of the arc plate. The sliders are slidably connected to the sliding groove, and the rubber cylinder is sleeved with the large-diameter drug loading tube.

[0015] The rubber sleeve is connected to the large-diameter charging tube. The arc plate is connected by a telescopic rod and a spring. Its slider moves along the sliding groove of the guide tube. When lowered, the spring pushes the arc plate to fit tightly against the sliding groove. During installation, the traction rope pulls the guide tube, and the spring automatically compensates for the gaps in the rock strata. By dynamically adapting to the borehole wall, the detonator is accurately positioned to prevent it from slipping. The rubber sleeve makes it easy to install the snap-fit ​​fixing components on the outside of the charging tube.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This spliced ​​borehole segmented variable diameter charging device has the following advantages: 1. This modular, segmented variable-diameter charging device for boreholes allows for adjustment of the charge diameter based on the varying hardness coefficients of the borehole wall rock. It enables coupled charging in hard rock, increasing the linear charge density and enhancing the explosive's fracturing effect on hard rock, while decoupled charging in soft rock reduces the linear charge density and minimizes the formation of blasting cavities. This results in differentiated charging at different locations within the same borehole. This charging structure improves the fracturing effect on hard rock when there are soft-hard strata or interlayers, reducing the rate of large fragments.

[0017] 2. This modular borehole segmented variable diameter charging device achieves segmented diameter changes through threaded splicing; its modular design adapts to differences in soft and hard rock strata; standardized interfaces ensure sealing; threaded connections provide a stable structure; multiple specifications of charging pipes adapt to different blasting needs; modular design enhances expandability; and it also enables rapid assembly of charging pipes. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 A magnified view of the structure at point A in the middle; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0019] In the diagram: 1. Guide tube, 2. Sliding groove, 3. Explosive tube assembly, 31. Small diameter explosive tube, 32. Upper threaded groove, 33. Lower threaded groove, 34. Large diameter explosive tube, 35. Bottom sealing cap, 36. Connecting nut interface, 37. Bottom nut interface, 38. Explosive charge, 4. Top sealing assembly, 41. Ring wedge mounting cap, 42. Ring wedge connecting groove, 43. Flexible wall-adhering ring, 44. Detonator lead wire threading hole, 45. Pipeline fixing ring, 5. Snap-fit ​​fixing assembly, 51. Rubber cylinder, 52. Telescopic rod, 53. Spring, 54. Arc plate, 55. Slider, 6. Traction rope. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This embodiment provides a technical solution: a splicing type segmented variable diameter charging device for boreholes, including a guide tube 1, a sliding groove 2, a charging tube assembly 3, a top sealing assembly 4, a snap-fit ​​fixing assembly 5, and a traction rope 6; Guide tube 1: Sliding grooves 2 are opened on the left and right sides of the inner side. The traction rope 6 passes through the inner side of the guide tube 1. The inside of the guide tube 1 is equipped with a drug loading tube assembly 3, a top sealing assembly 4 and a snap-fit ​​fixing assembly 5. The loading tube assembly 3 includes a large-diameter loading tube 34, a connecting nut interface 36, and a bottom nut interface 37. The upper end of the large-diameter loading tube 34 is fixedly connected to the connecting nut interface 36, and the lower end of the large-diameter loading tube 34 has a bottom nut interface 37 on its inner side. The top of the large-diameter loading tube 34 is tapered.

[0022] The device achieves directional sliding of the propellant tube assembly 3 through the sliding groove 2 of the guide tube 1, with the traction rope 6 assisting in positioning. The large-diameter propellant tube 34 achieves modular connection through the connecting nut interface 36 and the bottom nut interface 37. The conical top facilitates insertion into the borehole. The guide tube 1 ensures the linear movement of the propellant tube. The traction rope 6 lowers the assembly to the specified depth of the borehole. The large-diameter propellant tube 34 is used for coupling propellant in hard rock formations. The conical top ensures that the bulk propellant fills the tube body. The threaded interface design simplifies the splicing process, and the conical top prevents powder residue. The large-diameter tube increases the propellant density in hard rock formations. The sliding groove 2 ensures accurate positioning of the assembly.

[0023] The loading tube assembly 3 also includes a small-diameter loading tube 31, an upper threaded groove 32, and a lower threaded groove 33. The upper threaded groove 32 is provided on the upper outer side of the small-diameter loading tube 31, and the lower threaded groove 33 is provided on the lower inner side of the small-diameter loading tube 31. The upper threaded groove 32 is threadedly connected to the bottom nut interface 37 or the lower threaded groove 33 at the lower end of another small-diameter loading tube 31. The connecting nut interface 36 is threadedly connected to the lower threaded groove 33 or the bottom nut interface 37 on the lower side of another large-diameter loading tube 34.

[0024] The small-diameter charging tube 31 is flexibly connected to the large-diameter charging tube 34 or other small-diameter tubes through the upper threaded groove 32 and the lower threaded groove 33, forming a variable diameter combination; the large-diameter tube 34 is spliced ​​with the small-diameter tube 31 or another large-diameter tube through the connecting nut interface 36. According to the rock hardness data, the large-diameter tubes are spliced ​​alternately: the large-diameter tube is used to couple the charging in hard rock sections to enhance the breaking force, and the small-diameter tube is used to decouple the charging in soft rock sections to reduce energy leakage. The threaded splicing realizes segmented variable diameter; the modular design adapts to the differences between soft and hard rock layers; the standardized interface ensures sealing, the threaded connection provides a stable structure, the multi-specification charging tubes adapt to different blasting needs, and the modular design improves scalability.

[0025] The charging tube assembly 3 also includes a bottom sealing cap 35 and an initiating charge 38. The inner side of the bottom nut interface 37 is threadedly connected to the bottom sealing cap 35, and the initiating charge 38 is placed inside the large-diameter charging tube 34 or the small-diameter charging tube 31.

[0026] The bottom sealing cap 35 is screwed into the bottom nut interface 37 to seal the charging tube. The detonating charge 38 can be freely placed in tubes of different diameters. The sealing cap 35 seals the bottom of the tube to prevent leakage of the explosive. The detonating charge 38 is placed in the hard rock section of the tube according to the rock type. The detonating charge sealing cap is used to prevent the explosive from leaking. The detonating charge can be flexibly configured to meet the needs of segmented detonation. The bottom seal prevents powder leakage. The detonation point can be flexibly set to optimize the hard rock breaking effect.

[0027] The top sealing assembly 4 includes a wedge-shaped mounting cap 41, a wedge-shaped connecting groove 42, a flexible wall-adhering ring 43, and a detonator lead wire through hole 44. The wedge-shaped mounting cap 41 has a wedge-shaped connecting groove 42 on its inner side, a detonator lead wire through hole 44 in the middle of the upper end of the wedge-shaped mounting cap 41, and a flexible wall-adhering ring 43 in the upper outer side of the wedge-shaped mounting cap 41.

[0028] The ring-wedge mounting cap 41 secures the propellant tube via the ring-wedge connecting groove 42, the flexible wall-adhering ring 43 conforms to the inner wall of the borehole, and the detonator lead wire through hole 44 guides the wiring. Advantages: The flexible wall-adhering ring 43 enhances sealing; the detonator lead wire through hole 44 prevents wiring tangling; the mounting cap 41 is fixed to the top propellant tube via the connecting groove 42; the flexible wall-adhering ring 43 expands to conform to the borehole wall, preventing propellant powder from entering the borehole gap; the flexible wall-adhering ring 43 provides a double seal to prevent propellant leakage; the detonator lead wire through hole 44 protects the detonator lead wire from being squeezed.

[0029] The top sealing assembly 4 also includes a pipeline retaining ring 45, with the pipeline retaining ring 45 threadedly connected to the upper eccentric position of the ring wedge mounting cap 41.

[0030] The 45-inch pipeline fixing ring is eccentrically installed to secure the detonator lead wire, preventing the detonator from falling off when pulled. The eccentric design optimizes space utilization, and the threaded connection facilitates disassembly and maintenance. The 45-inch fixing ring connects the detonator and the connecting wire, ensuring that the detonator can be moved using the connecting wire during installation. The eccentric design prevents the wire from getting tangled; the threaded connection facilitates inspection and replacement.

[0031] The snap-fit ​​fixing assembly 5 also includes a rubber cylinder 51, a telescopic rod 52, a spring 53, an arc plate 54, and a slider 55. Two telescopic rods 52 are fixedly connected to the left and right ends of the outer side of the rubber cylinder 51. A spring 53 is sleeved on the outer side of the telescopic rod 52. Slider 55 is fixedly connected to the upper and lower ends of the inner side of the arc plate 54. The slider 55 is slidably connected to the sliding groove 2. The rubber cylinder 51 is sleeved with the large-diameter drug loading tube 34.

[0032] The rubber sleeve 51 is sleeved with the large-diameter charging tube 34. The arc plate 54 is connected by the telescopic rod 52 and the spring 53. Its slider 55 moves along the sliding groove 2 of the guide tube. When lowered, the spring 53 pushes the arc plate 54 to fit tightly against the sliding groove 2. During installation, the traction rope 6 pulls the guide tube 1, and the spring 53 automatically compensates for the gaps in the rock strata. By dynamically adapting to the borehole wall, the detonator is accurately positioned to prevent it from slipping. The rubber sleeve 51 facilitates the installation of the snap-fit ​​fixing component 5 on the outside of the charging tube.

[0033] The working principle of the spliced ​​segmented variable diameter charging device in the borehole provided by this utility model is as follows: First, based on the hardness data of the rock strata in the borehole, the operator modularly assembles the required number of large-diameter charging tubes 34 and small-diameter charging tubes 31 through threaded interfaces. Large-diameter tubes are used for coupled charging in hard rock sections, while small-diameter tubes are used for uncoupled charging in soft rock sections. The bottom sealing cap 35 is then tightened at the bottom, and the detonating charge 38 is placed inside the predetermined tube segment. The assembled charging tube assembly 3 is then inserted into the guide tube 1 and secured by the snap-fit ​​component 5. The rubber sleeve 51 is sleeved on the outside of the charging tube, such as the large-diameter tube 34, and its slider 55 is embedded in the sliding groove 2 inside the guide tube 1. The entire guide tube 1 and its internal components are pulled by the traction rope 6, so that it slides down along the sliding groove 2 to the specified depth of the blast hole. At this time, the spring 53 of the locking and fixing component 5 pushes the arc plate 54 to dynamically adapt to the hole wall to achieve positioning. Finally, the top sealing component 4 is installed on the top charging tube and fixed by the ring wedge connecting groove 42. The flexible wall-adhering ring 43 expands to seal the blast hole, and the detonator lead wire is led out through the detonator lead wire through hole 44.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A spliced in-hole segmented variable diameter charge device, characterized in that: It includes a guide tube (1), a sliding groove (2), a drug loading tube assembly (3), a top sealing assembly (4), a snap-fit ​​fixing assembly (5), and a traction rope (6); Guide tube (1): Sliding grooves (2) are provided on the left and right sides of the inner side. The traction rope (6) passes through the inner side of the guide tube (1). The inside of the guide tube (1) is provided with a drug loading tube assembly (3), a top sealing assembly (4) and a snap-fit ​​fixing assembly (5). The charging tube assembly (3) includes a large-diameter charging tube (34), a connecting nut interface (36) and a bottom nut interface (37). The upper end of the large-diameter charging tube (34) is fixedly connected to the connecting nut interface (36), and the lower end of the large-diameter charging tube (34) is provided with a bottom nut interface (37). The top of the large-diameter charging tube (34) is conical.

2. The split segmented variable diameter charge device of claim 1, wherein: The loading tube assembly (3) also includes a small-diameter loading tube (31), an upper threaded groove (32) and a lower threaded groove (33). The upper threaded groove (32) is provided on the upper outer side of the small-diameter loading tube (31), and the lower threaded groove (33) is provided on the lower inner side of the small-diameter loading tube (31). The upper threaded groove (32) is threadedly connected to the bottom nut interface (37) or the lower threaded groove (33) at the lower end of another small-diameter loading tube (31). The connecting nut interface (36) is threadedly connected to the lower threaded groove (33) or the bottom nut interface (37) on the lower side of another large-diameter loading tube (34).

3. The spliced ​​borehole segmented variable diameter charging device according to claim 2, characterized in that: The charging tube assembly (3) also includes a bottom sealing cap (35) and an initiating charge (38). The inner side of the bottom nut interface (37) is threadedly connected to the bottom sealing cap (35). The initiating charge (38) is placed inside the large-diameter charging tube (34) or the small-diameter charging tube (31).

4. The spliced ​​borehole segmented variable diameter charging device according to claim 1, characterized in that: The top sealing assembly (4) includes a ring wedge mounting cap (41), a ring wedge connecting groove (42), a flexible wall-adhering ring (43), and a detonator lead wire threading hole (44). The ring wedge mounting cap (41) has a ring wedge connecting groove (42) on its inner side, a detonator lead wire threading hole (44) in the middle of the upper end of the ring wedge mounting cap (41), and a flexible wall-adhering ring (43) in the upper outer side of the ring wedge mounting cap (41).

5. A segmented variable-diameter charging device for boreholes according to claim 4, characterized in that: The top sealing assembly (4) also includes a pipeline retaining ring (45), which is threaded to the upper eccentric position of the ring wedge mounting cap (41).

6. The spliced ​​borehole segmented variable diameter charging device according to claim 1, characterized in that: The snap-fit ​​fixing assembly (5) also includes a rubber cylinder (51), a telescopic rod (52), a spring (53), an arc plate (54), and a slider (55). Two telescopic rods (52) are fixedly connected to the left and right ends of the outer side of the rubber cylinder (51). A spring (53) is sleeved on the outer side of the telescopic rod (52). A slider (55) is fixedly connected to the upper and lower ends of the inner side of the arc plate (54). The slider (55) is slidably connected to the sliding groove (2). The rubber cylinder (51) is sleeved with the large-diameter drug loading tube (34).

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