A blasting auxiliary charging device for open-pit mine

Abstract

This utility model discloses an auxiliary charging device for open-pit mine blasting, relating to the technical field of mining engineering, including a sleeve, drill rod assembly, cutting assembly, adsorption assembly, and drive assembly. This utility model drives the drill barrel to rotate the cutting blade and the crushing drill bit. The cutting blade can cut and scrape away ice and snow on the inner wall of the charging hole, while the crushing drill bit can crush the ice and snow inside the charging hole below the drill barrel. The crushed ice and snow enter the drill barrel through the feed window. At this time, an external negative pressure fan creates negative pressure inside the adsorption hood, drawing the crushed ice and snow from the drill barrel into the adsorption hood and out through the ice and snow removal pipe to the outside, thus achieving smooth removal of ice and snow inside the charging hole and effectively assisting in mine blasting charging. The sleeve and drill barrel are connected by a threaded connection. When the cutting blade and crushing drill bit are severely worn and need replacement, the drill barrel can be disassembled from the lower end of the sleeve for replacement without replacing the entire sleeve, effectively reducing waste.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining engineering, and in particular relates to an auxiliary charging device for blasting in open-pit mines. Background Technology

[0002] In open-pit bench blasting operations in high-altitude, cold regions, surface freezing and snow cover are common due to extreme weather conditions, posing challenges to the smooth conduct of blasting operations. During drilling operations, high-altitude areas have abundant groundwater and widespread permafrost, frequently resulting in groundwater gushing and causing ice to form at the borehole opening and walls. This icing can easily reduce the borehole diameter or even block it, affecting the charging process and potentially leading to reduced charge quantity, decreased charge quality, and ultimately, compromised blasting effectiveness.

[0003] Currently, a common solution to the problem of ice and snow inside blast holes is to melt the ice by heating. However, this method is inefficient and increases manual labor intensity, making it difficult to meet the needs of high-efficiency construction. Furthermore, a search revealed that patent application number 202221734207.8 discloses an auxiliary charging device for blasting in open-pit mines in high-altitude and cold regions. This device includes a metal sleeve, a cutting drill bit, and a metal dome. The cutting drill bit uses an annular blade to cut the ice and snow inside the blast hole and guides the cut ice and snow into the metal sleeve. However, in actual use, the applicant found that ice and snow above the metal baffle inside the cutting drill bit may get stuck on the back of the metal baffle due to its own weight, thus hindering the normal opening of the metal baffle and preventing subsequent ice and snow from smoothly entering the metal sleeve.

[0004] Therefore, existing technologies still need further improvement and enhancement. Utility Model Content

[0005] This invention provides an auxiliary charging device for blasting in open-pit mines, which aims to solve the problem in the prior art where the opening of metal baffles is obstructed due to snow and ice accumulation, preventing snow and ice from smoothly entering the collection device, while improving snow and ice removal efficiency and the maintainability of the device.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An auxiliary charging device for blasting in open-pit mines is provided, comprising a sleeve, a drill rod assembly, a cutting assembly, an adsorption assembly, and a driving assembly; the drill rod assembly includes a drill cylinder and a crushing drill bit, the drill cylinder being threadedly connected to the lower end of the sleeve, and the lower end of the drill cylinder having multiple feed windows, the crushing drill bit being located at the lower end of the drill cylinder; the cutting assembly includes multiple cutting blades, the cutting blades being fixedly connected to the outer wall of the drill cylinder; the adsorption assembly includes an ice and snow guide pipe and an adsorption hood, the ice and snow guide pipe penetrating the upper end of the sleeve and communicating with the adsorption hood; the driving assembly includes an anchor cable drill rod, the anchor cable drill rod being connected to the upper end of the sleeve.

[0007] In one possible implementation of the open-pit mine blasting auxiliary charging device provided by this utility model, the lower end of the sleeve is provided with an internal thread, the upper end of the drill barrel is provided with an external thread, and the external thread and the internal thread are threadedly engaged.

[0008] In one possible implementation of the open-pit mine blasting auxiliary charging device provided by this utility model, a plurality of the feeding windows are evenly distributed along the circumference of the drill barrel, and the inner sidewall of each feeding window is provided with a guiding slope.

[0009] In one possible implementation of the open-pit mine blasting auxiliary charging device provided by this utility model, the crushing drill bit includes multiple conical crushing teeth, which are uniformly distributed along the axial and radial directions of the drill barrel.

[0010] In one possible implementation of the open-pit mine blasting auxiliary charging device provided by this utility model, the adsorption hood is fixedly disposed on the inner side of the lower end of the sleeve.

[0011] In one possible implementation of the open-pit mine blasting auxiliary charging device provided by this utility model, the cutting blades are arranged in a ring array along the outer wall of the drill barrel, and the cutting edge of each cutting blade faces the rotation direction of the drill barrel.

[0012] This utility model provides an auxiliary charging device for open-pit mine blasting. It drives a drill barrel to rotate a cutting blade and a crushing drill bit. The cutting blade scrapes away ice and snow from the inner wall of the charging hole, while the crushing drill bit breaks up the ice and snow inside the charging hole below the drill barrel. The broken ice and snow enter the drill barrel through the feed window. At this time, an external negative pressure fan creates negative pressure inside the adsorption hood, drawing the broken ice and snow from the drill barrel into the adsorption hood and out through the ice and snow removal pipe, thus effectively clearing the ice and snow inside the charging hole and assisting in mine blasting charging.

[0013] In addition, the sleeve and the drill barrel are connected by a threaded connection. When the cutting tool and the breaker bit are severely worn and need to be replaced, the drill barrel can be removed from the lower end of the sleeve for replacement without replacing the entire sleeve, which effectively reduces waste. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a top view schematic diagram of an auxiliary charging device for blasting in an open-pit mine according to the present invention;

[0016] Figure 2 This is a bottom view structural diagram of an auxiliary charging device for blasting in an open-pit mine according to the present invention;

[0017] Figure 3 This is a schematic diagram of the internal structure of an auxiliary charging device for blasting in an open-pit mine, according to the present invention.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Sleeve; 2. Drill barrel; 21. Feed window; 3. Cutting blade; 4. Anchor cable drill rod; 5. Snow and ice removal pipe; 6. Crushing drill bit; 7. Adsorption hood. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] This invention provides an auxiliary charging device for blasting in open-pit mines, the structure of which is as follows: Figures 1 to 3 As shown, the invention mainly includes a sleeve 1, a drill pipe assembly, a cutting assembly, an adsorption assembly, and a drive assembly. The specific embodiments of the invention will be described in detail below with reference to the accompanying drawings.

[0022] The sleeve 1 is a hollow cylindrical structure with an internal thread at its lower end for connection with the external thread of the drill rod assembly. An observation window made of transparent material can be provided at the upper end of the sleeve 1, allowing operators to observe the flow of ice and snow within the ice and snow guide tube 5 in real time. The outer wall of the sleeve 1 has anti-slip textured lines along its axial direction, increasing friction for the operator's grip and facilitating installation and disassembly of the device. The ice and snow guide tube 5 in the adsorption assembly passes through the upper end of the sleeve 1 and communicates with the adsorption cover 7, which is fixed to the inner side of the lower end of the sleeve 1.

[0023] The drill rod assembly includes a drill barrel 2 and a crushing drill bit 6 located at the lower end of the drill barrel 2. The upper end of the drill barrel 2 has an external thread that mates with the internal thread at the lower end of the sleeve 1. Multiple feed windows 21 are evenly distributed around the circumference of the drill barrel 2 at its lower end. Each feed window 21 has a guide slope on its inner wall to guide the crushed ice and snow into the drill barrel 2. The crushing drill bit 6, located at the lower end of the drill barrel 2, includes multiple conical crushing teeth evenly distributed axially and radially along the drill barrel 2. The conical crushing teeth design enables multi-angle crushing of the ice and snow at the bottom of the charging hole, thereby improving crushing efficiency.

[0024] The cutting assembly includes multiple cutting blades 3 arranged in a circular array along the outer wall of the drill barrel 2, with the cutting edge of each cutting blade 3 facing the direction of rotation of the drill barrel 2. The cutting blades 3 are connected to the outer wall of the drill barrel 2 by bolts, a connection method that facilitates quick replacement after ice and snow accumulation or wear. In addition, an elastic washer is preferably provided between the cutting blades 3 and the drill barrel 2. The elastic washer can absorb the vibration generated during cutting and reduce the risk of loosening of the cutting blades 3.

[0025] The adsorption assembly includes an ice and snow guide pipe 5 and an adsorption hood 7. The ice and snow guide pipe 5 is equipped with spiral guide vanes arranged spirally along its inner wall to accelerate the flow of ice and snow within the pipe. The adsorption hood 7 is equipped with a filter screen to prevent large pieces of ice and snow from entering the ice and snow guide pipe 5 and causing blockages. An external negative pressure fan creates negative pressure inside the adsorption hood 7, drawing broken ice and snow from inside the drill barrel 2 into the hood 7 and guiding it to the outside through the ice and snow removal pipe 5. This facilitates the removal of ice and snow from the charging hole, allowing for the smooth filling of the charging hole with explosives and enabling auxiliary charging for blasting in the mine. Preferably, the adsorption hood 7 is connected to the lower end of the sleeve 1 via a snap-fit ​​mechanism. The snap-fit ​​mechanism includes a fixed end and a movable end. The fixed end is welded to the lower end of the sleeve 1, and the movable end is hinged to the outer wall of the adsorption hood 7. This design allows for quick disassembly of the adsorption hood 7 for cleaning.

[0026] The drive assembly includes an anchor cable drill rod 4 and a power output mechanism. The anchor cable drill rod 4 is connected to the upper end of the sleeve 1 and is used to drive the sleeve 1 and the drill rod assembly to rotate synchronously. The anchor cable drill rod 4 is connected to the power output mechanism via a coupling, which includes two half-couplings and a locking bolt. The two half-couplings are respectively connected to the output shafts of the anchor cable drill rod 4 and the power output mechanism. The locking bolt secures the two half-couplings together, ensuring transmission stability. The power output mechanism includes a motor and a reducer. The motor and reducer are connected via belt drive. The output shaft of the reducer is connected to the coupling, converting the high-speed rotation of the motor into a low-speed, high-torque output to meet the working requirements of the drill rod assembly.

[0027] In practical applications, the operator first assembles the sleeve 1 and drill rod assembly using threaded connections. Then, the cutting blade 3 is bolted to the outer wall of the drill barrel 2, and an elastic washer is installed between the blade and the drill barrel 2. Next, the suction hood 7 is secured to the inner side of the lower end of the sleeve 1 using clips, and the ice and snow guide pipe 5 is inserted into the upper end of the sleeve 1 to connect with the suction hood 7. The anchor cable drill rod 4 is connected to the power output mechanism via a coupling to ensure stable transmission. After starting the power output mechanism, the motor drives the reducer, and the reducer's output shaft drives the anchor cable drill rod 4 to rotate via the coupling, thereby causing the sleeve 1 and drill rod assembly to rotate synchronously.

[0028] When the device starts working, the crushing drill bit 6 at the lower end of the drill barrel 2 crushes the ice and snow at the bottom of the charging hole from multiple angles. The crushed ice and snow enter the interior of the drill barrel 2 through the feed window 21. The cutting blade 3 cuts the surrounding ice and snow as the drill barrel 2 rotates. The cut ice and snow are then sucked into the ice and snow guide pipe 5 by the adsorption hood 7 under negative pressure, accelerated by the spiral guide vanes, and discharged outside the device. The filter screen inside the adsorption hood 7 prevents large pieces of ice and snow from entering the ice and snow guide pipe 5, thus preventing blockage.

[0029] During use, if the adsorption cover 7 needs cleaning, the operator can quickly disassemble it by simply opening the movable end of the clip. When the cutting blade 3 needs to be replaced due to ice and snow accumulation or wear, it can be replaced directly by unscrewing the bolt, improving the maintainability of the device. The use of antifreeze lubricant reduces resistance during disassembly, further improving operational convenience.

[0030] To enable those skilled in the art to fully understand and implement this invention, the following provides further supplementary explanations of the specific implementation principles and operating steps of this invention in conjunction with a specific application scenario.

[0031] When conducting open-pit bench blasting in high-altitude, cold regions, operators first assemble the sleeve 1 and drill rod assembly via threaded connection. Specifically, the external thread of the drill barrel 2 tightly engages with the internal thread at the lower end of the sleeve 1, and antifreeze lubricant is used to reduce connection resistance in low-temperature environments. Subsequently, the cutting blade 3 is bolted to the outer wall of the drill barrel 2, and an elastic washer is installed between the blade and the drill barrel 2 to absorb vibrations generated during cutting. The adsorption hood 7 is secured to the inner side of the lower end of the sleeve 1 with clips, and the ice and snow guide pipe 5 is inserted into the upper end of the sleeve 1 and communicates with the adsorption hood 7. The anchor cable drill rod 4 is connected to the power output mechanism via a coupling to ensure stable transmission.

[0032] After the power output mechanism is activated, the motor drives the reducer to work. The reducer converts high-speed rotation into low-speed, high-torque output through belt transmission. The output shaft of the reducer drives the coupling to rotate, which in turn drives the anchor drill rod 4 to rotate. The rotation of the anchor drill rod 4 is synchronously transmitted to the sleeve 1 and the drill rod assembly, putting the entire device into working condition. At this time, the crushing drill bit 6 at the lower end of the drill barrel 2 begins to crush the ice and snow at the bottom of the charging hole from multiple angles. Multiple conical crushing teeth on the crushing drill bit 6 are evenly distributed along the axial and radial directions of the drill barrel 2, which can cut into the ice and snow from different angles, thereby improving the crushing efficiency. The crushed ice and snow enter the interior of the drill barrel 2 through the feed window 21 opened at the lower end of the drill barrel 2. Each feed window 21 has a guide slope on its inner sidewall, which can guide the ice and snow to slide smoothly into the interior of the drill barrel 2.

[0033] Meanwhile, the cutting blades 3, as the drill barrel 2 rotates, cut away the ice and snow on the inner wall of the borehole. The cutting blades 3 are arranged in a circular array along the outer wall of the drill barrel 2, with their cutting edges facing the direction of rotation of the drill barrel 2, enabling efficient removal of ice and snow from the inner wall of the borehole. The cut ice and snow are then sucked into the ice and snow guide pipe 5 by the suction hood 7 under negative pressure. The spiral guide vanes inside the ice and snow guide pipe 5 are spirally arranged along its inner wall, accelerating the flow speed of the ice and snow within the pipe and allowing it to be quickly discharged outside the device. The filter screen inside the suction hood 7 prevents large pieces of ice and snow from entering the ice and snow guide pipe 5, preventing blockages.

[0034] When a large amount of ice, snow, or impurities accumulate inside the adsorption hood 7, the operator can quickly disassemble the adsorption hood 7 for cleaning simply by opening the movable end of the latch. The latch design includes a fixed end welded to the lower end of the sleeve 1 and a movable end hinged to the outer wall of the adsorption hood 7. This structure simplifies the disassembly process and improves operational convenience. If the cutting blade 3 and the breaker drill bit 6 need to be replaced due to ice and snow accumulation or wear, the operator can directly unscrew the bolts to replace the blades. Furthermore, the drill barrel 2 can be unscrewed from the lower end of the sleeve 1 by rotating it counterclockwise for individual replacement, further enhancing the maintainability of the device.

[0035] In summary, in practical applications, this invention achieves efficient removal of ice and snow from boreholes through the synergistic action of the crushing drill bit, cutting blade, and adsorption assembly at the lower end of the drill barrel. Meanwhile, the quick-disassembly design of the adsorption hood significantly improves the ease of operation and maintenance efficiency of the device.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications to the technical solutions described in the foregoing embodiments or equivalent substitutions of some of the technical features shall fall within the protection scope of the present utility model.

Claims

1. A blast assisted charging device for an open pit mine, characterised in that, The assembly includes a sleeve (1), a drill rod assembly, a cutting assembly, an adsorption assembly, and a drive assembly. The drill rod assembly includes a drill cylinder (2) and a crushing drill bit (6). The drill cylinder (2) is threaded onto the lower end of the sleeve (1). The lower end of the drill cylinder (2) has multiple feed windows. The crushing drill bit (6) is located at the lower end of the drill cylinder (2). The cutting assembly includes multiple cutting blades (3). The cutting blades (3) are fixedly connected to the outer wall of the drill cylinder (2). The adsorption assembly includes an ice and snow guide pipe (5) and an adsorption cover (7). The ice and snow guide pipe (5) passes through the upper end of the sleeve (1) and communicates with the adsorption cover (7). The drive assembly includes an anchor cable drill rod (4). The anchor cable drill rod (4) is connected to the upper end of the sleeve (1).

2. The auxiliary charge device for surface mine blasting according to claim 1, characterized in that, The lower end of the sleeve (1) is provided with an internal thread, and the upper end of the drill barrel (2) is provided with an external thread, and the external thread and the internal thread are threadedly engaged.

3. The auxiliary charge device for blasting in open-pit mines according to claim 1, characterized in that, Multiple feed windows (21) are evenly distributed around the circumference of the drill barrel (2), and the inner sidewall of each feed window (21) is provided with a guide slope.

4. The auxiliary charge device for blasting in open-pit mines according to claim 1, characterized in that, The crushing drill bit (6) includes multiple conical crushing teeth, which are uniformly distributed along the axial and radial directions of the drill barrel (2).

5. The auxiliary charge device for blasting in open-pit mines according to claim 1, characterized in that, The adsorption cover (7) is fixedly installed on the inner side of the lower end of the sleeve (1).

6. The auxiliary charge device for blasting in open-pit mines according to claim 1, characterized in that, The cutting blades (3) are arranged in a ring array along the outer wall of the drill barrel (2), and the cutting edge of each cutting blade (3) faces the rotation direction of the drill barrel (2).

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