An open pit mining borehole axial slitting device

Abstract

The utility model relates to a kind of open-pit mining blasthole axial slitting device, including cylinder, the threaded column is threaded cylinder upper end, and multiple groups of guide mechanism and multiple groups of cutting mechanism are arranged at interval in lower end, and guide mechanism and cutting mechanism are alternately arranged;The guide mechanism is arranged on the outer surface of cylinder;The cutting mechanism is arranged in the reserved cavity that is previously opened in cylinder interior, and the cutting mechanism can be telescopic adjustment.The utility model uses electric push rod and driving motor to control the extension and rotation of cutting wheel, can flexibly adjust cutting depth and direction according to different design and cutting demand, cutting wheel is retracted after construction, the integrity of blasthole wall can also be ensured, combined with intelligent control mode, the control precision of cutting action can be further improved, ensure the uniformity and consistency of slitting, significantly improve the flexibility, adaptability and accuracy of cutting.

Description

Technical Field

[0001] This utility model relates to the field of blast hole cutting equipment technology, specifically to an axial cutting device for blast holes in open-pit mining. Background Technology

[0002] In open-pit mining operations, blasting through boreholes is a crucial step in achieving rock breaking, and its effectiveness directly impacts subsequent mining efficiency and quality. To improve blasting efficiency, axial slit cutting technology is widely used in boreholes. By cutting axial slits in the borehole wall, blasting energy is guided to be released in a predetermined direction, thereby achieving more precise blasting control.

[0003] However, most existing axial slitting technologies employ fixed cutting tools, which cannot flexibly adjust the cutting depth and direction according to different rock strata conditions and construction requirements. This results in low cutting efficiency and makes it difficult to meet the cutting needs under complex working conditions. Furthermore, existing devices are difficult to retrieve smoothly after cutting, easily damaging the borehole wall and affecting subsequent blasting results. Therefore, developing a new type of axial slitting device that can adapt to different rock strata conditions and construction requirements is of great significance for improving the blasting efficiency and quality in open-pit mining. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an axial cutting device for blast holes in open-pit mining. It employs a cutting tool with adjustable cutting depth and direction, which can be flexibly adjusted according to different design and cutting requirements, providing an efficient and precise axial cutting solution for open-pit mining blasting operations.

[0005] The specific technical solution of this utility model is as follows:

[0006] An axial cutting device for blast holes in open-pit mining includes a column. The upper end of the column is a threaded column, and the lower end is provided with multiple sets of guiding mechanisms and multiple sets of cutting mechanisms at intervals, with the guiding mechanisms and cutting mechanisms arranged alternately. The guiding mechanisms are located on the outer surface of the column. The cutting mechanisms are located in a pre-drilled cavity inside the column and are adjustable for extension and retraction.

[0007] Preferably, the lower end of the column is provided with five sets of guiding mechanisms and four sets of cutting mechanisms at intervals, arranged sequentially from top to bottom.

[0008] More preferably, the guide mechanism between two adjacent cutting mechanisms is located in the middle position.

[0009] Preferably, each set of the guide mechanism includes at least two fixed rods arranged in a circular array, the fixed rods being connected to the outer surface of the column, and the ends of the fixed rods being rotatably connected to guide wheels.

[0010] More preferably, each set of the guiding mechanism includes four fixed rods arranged in a circular array and four matching guide wheels.

[0011] Preferably, each set of the cutting mechanism includes two symmetrically arranged fixed seats, which are installed in a pre-drilled cavity inside the column. The other end of the fixed seat is hinged to a first connecting rod, and the end of the first connecting rod is hinged to a second connecting rod. A drive motor is installed on one side of the end of the second connecting rod. The output shaft of the drive motor passes through the second connecting rod and is connected to the center of the cutting wheel. An electric push rod is also hinged between the first connecting rod and the second connecting rod to control the extension and retraction of the cutting wheel.

[0012] Preferably, the column has a wiring channel in the axial direction, which extends from the top of the column to the fixing seat of the lowest set of cutting mechanisms, and the two sides of the wiring channel are connected to the fixing seat of each set of cutting mechanisms from top to bottom.

[0013] The beneficial effects of this invention are as follows: This invention uses an electric push rod and a drive motor to control the extension and rotation of the cutting wheel, which can flexibly adjust the cutting depth and direction according to different design and cutting requirements. After construction, the cutting wheel retracts, ensuring the integrity of the borehole wall. Combined with intelligent control, it further improves the control precision of the cutting action, ensuring the uniformity and consistency of the cut, significantly improving the flexibility, adaptability, and accuracy of cutting. Moreover, the device can achieve cutting at different angles by rotating the drill rod, meeting diverse mining needs without the need for additional equipment or complex operations. Furthermore, the alternating arrangement of the cutting wheel's guiding mechanism and the cutting mechanism ensures stable operation of the device within the borehole, avoiding adverse effects on the cutting effect caused by device shaking. Overall, this device also has the advantages of simple operation, strong adaptability, and high level of intelligence, meeting diverse cutting needs in different open-pit mining scenarios and providing strong technical support for improving the blasting efficiency and quality of open-pit mining. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of an axial slit cutting device for open-pit blast holes according to the present invention;

[0015] Figure 2 This is a cross-sectional view of the cutting mechanism;

[0016] Figure 3 Cross-sectional view of the guiding mechanism;

[0017] Figure 4 This is the front view of the cutting mechanism;

[0018] In the diagram: 1-Column, 101-Threaded column, 102-Reserved cavity, 103-Line channel; 2-Guiding mechanism, 201-Fixed rod, 202-Guide wheel; 3-Cutting mechanism, 301-Fixed seat, 302-First connecting rod, 303-Second connecting rod, 304-Cutting wheel, 305-Drive motor, 306-Electric push rod. Detailed Implementation

[0019] To make the technical problems and solutions solved by this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 Figure 2 As shown in the figure, this embodiment provides an axial cutting device for open-pit blast holes, including a column 1. The upper end of the column 1 is a threaded column 101 for connecting to the drill rod of the drilling rig, enabling rapid installation and fixation of the device. The lower end of the column 1 is provided with five sets of guiding mechanisms 2 and four sets of cutting mechanisms 3, arranged alternately from top to bottom, i.e., one set of guiding mechanisms 2 is immediately followed by one set of cutting mechanisms 3, forming an orderly cyclic arrangement. This alternating arrangement not only optimizes the spatial layout of the device but also ensures that during the cutting process, the guiding mechanisms 2 can provide precise guidance for the cutting mechanisms 3, enabling them to operate stably within the blast hole, effectively improving the accuracy and stability of the cutting.

[0023] like Figure 3As shown, each guide mechanism 2 includes four fixed rods 201 arranged in a circular array and four guide wheels 202. The fixed rods 201 are connected to the outer surface of the column 1, and the guide wheels 202 are rotatably connected to the ends of the fixed rods 201. When the device is inserted into the borehole, the four guide wheels 202 can fit tightly against the inner wall of the borehole, allowing the entire device to move precisely up and down along the inner wall of the borehole. This ensures that the cutting mechanism 3 maintains a stable position during the cutting process and avoids uneven or offset cuts due to device shaking.

[0024] Preferably, the guide mechanism 2 between two adjacent sets of cutting mechanisms 3 is located in the middle position. This layout further enhances the stabilizing effect of the guide mechanism 2 on the device, making it more stable during the cutting process and effectively reducing the adverse effects on cutting accuracy caused by device shaking.

[0025] like Figure 2 Figure 4 As shown, each cutting mechanism 3 includes two symmetrically arranged fixed seats 301. The fixed seats 301 are installed in a pre-drilled cavity 102 inside the column 1. The other end of the fixed seat 301 is hinged to a first connecting rod 302. The end of the first connecting rod 302 is hinged to a second connecting rod 303. A drive motor 305 is installed on one side of the end of the second connecting rod 303. The output shaft of the drive motor 305 passes through the second connecting rod 303 and is connected to the center position of the cutting wheel 304. An electric push rod 306 is also hinged between the first connecting rod 302 and the second connecting rod 303 to control the extension and retraction of the cutting wheel 304.

[0026] When the device reaches the borehole, the electric push rod 306 begins to operate, pushing the first connecting rod 302 and the second connecting rod 303 to extend, thereby causing the cutting wheel 304 to extend radially until its outer edge is in close contact with the inner wall of the borehole. At this point, the drive motor 305 is activated, and the cutting wheel 304 begins to rotate, cutting the borehole wall. During the cutting process, the electric push rod 306 can continue to extend according to the required cutting depth, enabling the cutting wheel 304 to cut an axial slit of the required depth. Simultaneously, under the precise guidance of the guide mechanism 2, the drill rod moves the device up and down, thereby cutting continuous axial slits to meet the cutting requirements of different depths and lengths.

[0027] The electric push rod 306 retracts, driving the cutting wheel 304 away from the borehole wall until the outermost edge of the cutting wheel 304 does not exceed the outer edge of the guide wheel 202. At this point, guided by the guide mechanism 2, the entire device smoothly moves upward against the inner wall of the borehole, successfully leaving the borehole and completing the entire cutting process.

[0028] Furthermore, when it is necessary to cut axial slits at different angles on the inner wall of the borehole, since the device is integrally connected to the drill rod, simply rotating the drill rod by a certain angle (e.g., 90°) will cause the cutting wheels 304 on the device to change their angles accordingly. Assuming the initial position angles of the two symmetrically arranged cutting wheels 304 are 0° and 180° respectively, after rotating 90°, the position angles of the two cutting wheels 304 will become 90° and 270° respectively. Repeating the above cutting operation will then produce four axial slits with position angles of 0°, 90°, 180°, and 270° on the inner wall of the borehole. In this way, the device can flexibly cut axial slits at different position angles to meet diverse mining needs.

[0029] To facilitate wiring for the device, a wiring channel 103 is provided along the axial direction of the column 1. The wiring channel 103 extends from the top of the column 1 to the fixing seat 301 of the lowest set of cutting mechanisms 3, and both sides of the wiring channel 103 connect to the fixing seat 301 of each set of cutting mechanisms 3 from top to bottom. During wiring, the existing wiring of the drilling rig is used directly. The wire is passed through the top of the wiring channel 103, and then connected to the electric push rod 306 and the drive motor 305 from top to bottom, providing a stable and reliable power source for the cutting mechanism 3. This wiring design not only simplifies the wiring process but also ensures the safety and reliability of the wiring, avoiding damage or interference to the wiring during the cutting process.

[0030] It should be noted that the dimensions (including height and diameter) of the main body 1 can be designed according to the actual blast hole size, drilling rig model, and other specific circumstances to achieve optimal matching with existing mining equipment. The number and specific positions of the guiding mechanism 2 and the cutting mechanism 3 are not limited to those described above and can be flexibly adjusted according to the blast hole size, cutting requirements, and actual conditions at the mining site to achieve the best cutting effect and meet the needs of different open-pit mining scenarios. Furthermore, the number of the fixing rod 201 and its supporting components of the guiding mechanism 2, and the cutting wheel 304 and its supporting components of the cutting mechanism 3, can also be increased or decreased according to the diameter of the main body 1, the blast hole size, and cutting requirements to adapt to changing usage needs and ensure the practicality and reliability of the device.

[0031] Working principle: In use, first connect the main body 1 to the drill rod of the drilling rig via the threaded post 101 at the upper end. Then, insert the device into the blast hole. At this time, the four guide wheels 202 in the guide mechanism 2 are in close contact with the inner wall of the blast hole, so that the device is accurately positioned in the blast hole and can move up and down along the inner wall of the blast hole.

[0032] When the device reaches the predetermined cutting position, the electric push rod 306 starts working, pushing the first connecting rod 302 and the second connecting rod 303 to unfold, thereby driving the cutting wheel 304 to extend radially until the outer edge of the cutting wheel 304 is in close contact with the inner wall of the borehole. At this time, the drive motor 305 starts, and the cutting wheel 304 begins to rotate, cutting the borehole wall. During the cutting process, the electric push rod 306 can continue to extend according to the actual cutting depth requirements, enabling the cutting wheel 304 to cut an axial slit of the required depth. At the same time, under the precise guidance of the guide mechanism 2, the drill rod drives the device to move up and down, thereby cutting a continuous axial slit.

[0033] After the cutting operation is completed, the electric push rod 306 retracts, driving the cutting wheel 304 away from the borehole wall until the outermost edge of the cutting wheel 304 does not exceed the outer edge of the guide wheel 202. At this time, under the guidance of the guide mechanism 2, the entire device moves smoothly upward against the inner wall of the borehole, successfully leaving the borehole and completing the entire cutting process.

[0034] In practical use, this device can achieve intelligent cutting control through the drilling rig control system and sensors. During the rotation and cutting process of the cutting wheel 304, the sensor can provide real-time feedback on the cutting depth to the control system. The control system then adjusts the extension and retraction of the electric push rod 306 in real time based on the feedback information, thereby precisely controlling the cutting depth and ensuring that the cut meets the expected mining process requirements. This intelligent control method not only improves the accuracy and efficiency of cutting but also reduces human error, enhancing the safety and reliability of the entire mining operation. Of course, the intelligent control method described here is a conventional technical means, and those skilled in the art can implement it in combination with conventional methods, so further details will not be elaborated here.

[0035] The present invention has been described in detail above through specific and preferred embodiments. However, those skilled in the art should understand that the present invention is not limited to the embodiments described above. Any modifications or equivalent substitutions made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An axial slit cutting device for open-pit blast holes, characterized in that: The column (1) includes a threaded column (101) at the upper end and multiple sets of guide mechanisms (2) and multiple sets of cutting mechanisms (3) at intervals at the lower end. The guide mechanisms (2) and cutting mechanisms (3) are arranged alternately. The guide mechanisms (2) are set on the outer surface of the column (1). The cutting mechanisms (3) are set in a pre-reserved cavity (102) opened in advance inside the column (1). The cutting mechanisms (3) can be extended and retracted.

2. The axial slit cutting device for open-pit blast holes according to claim 1, characterized in that: The lower end of the column (1) is provided with five sets of guiding mechanisms (2) and four sets of cutting mechanisms (3) arranged sequentially from top to bottom.

3. The axial slit cutting device for open-pit blast holes according to claim 2, characterized in that: The guide mechanism (2) between two adjacent cutting mechanisms (3) is set in the middle position.

4. An axial slit cutting device for open-pit blast holes according to any one of claims 1-3, characterized in that: Each set of the guide mechanism (2) includes at least two fixed rods (201) arranged in a ring array. The fixed rods (201) are connected to the outer surface of the column (1), and the end of the fixed rods (201) is rotatably connected to a guide wheel (202).

5. The axial slit cutting device for open-pit blast holes according to claim 4, characterized in that: Each set of guide mechanisms (2) includes four fixed rods (201) arranged in a ring array and four guide wheels (202).

6. An axial slit cutting device for open-pit blast holes according to any one of claims 1-3 or 5, characterized in that: Each set of cutting mechanisms (3) includes two symmetrically arranged fixed seats (301). The fixed seats (301) are installed in a pre-opened cavity (102) inside the column (1). The other end of the fixed seat (301) is hinged to a first connecting rod (302). The end of the first connecting rod (302) is hinged to a second connecting rod (303). A drive motor (305) is installed on one side of the end of the second connecting rod (303). The output shaft of the drive motor (305) passes through the second connecting rod (303) and is connected to the center of the cutting wheel (304). An electric push rod (306) is also hinged between the first connecting rod (302) and the second connecting rod (303) to control the extension and retraction of the cutting wheel (304).

7. The axial slit cutting device for open-pit blast holes according to claim 6, characterized in that: The column (1) has a line channel (103) in the axial direction. The line channel (103) extends from the top of the column (1) to the fixing seat (301) of the lowest group of cutting mechanisms (3). The two sides of the line channel (103) are connected to the fixing seat (301) of each group of cutting mechanisms (3) from top to bottom.

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