A multi-layer electric ring knife device and sampling method for extremely broken rock mass sampling

Abstract

A multi-layer electric ring cutter device and sampling method for sampling extremely fractured rock masses includes a power supply, a power unit, a gear adjustment device, a gear transmission box, a top cover, an outer vertical ring cutter, an inner vertical ring cutter, a circumferential enclosure, and a transverse ring cutter. The gear adjustment device controls the rotation and extension of the outer vertical ring cutter head by adjusting the gear positions of the rotary motor and the lifting motor; after the outer vertical ring cutter head reaches the target height, it stops rotating and descends; the outer vertical ring cutter is retracted, and the circumferential enclosure is extended to complete the encapsulation of the rock sample to be cut; the rotary motor gear adjustment controls the rotation and ejection of the transverse ring cutter head; after the transverse ring cutter head completes the cutting, the entire large rock sample is collected; the rotary motor and lifting motor gear adjustment controls the rotation and extension of the inner vertical ring cutter head to complete the cutting and preparation of rock core samples of different sizes.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering, and in particular to a multi-layer electric ring cutter device and sampling method for sampling extremely fractured rock masses. Background Technology

[0002] Based on factors such as rock strength, rock mass integrity, groundwater, the orientation of major structural planes, and the strength-stress ratio of the surrounding rock, underground and cavern surrounding rocks can be divided into five categories: Class I, Class II, Class III, Class IV, and Class V. Among them, as the number of the surrounding rock category increases, the strength and stability of the surrounding rock decrease, and the degree of rock mass fragmentation increases. That is, Class V surrounding rock has the lowest stability and strength and is extremely easy to break.

[0003] With the rapid development of underground engineering in my country, more and more transportation, mining, water conservancy, and national defense projects are being built in rocky areas. Inevitably, these projects will encounter highly fragile rock masses, namely Class IV and Class V surrounding rock. Different forms of support and reinforcement are adopted depending on the rock type. Before formal support or reinforcement, core sampling is often conducted on-site, followed by relevant laboratory tests. The test results determine the relevant characteristics of the surrounding rock and the necessary support and reinforcement methods. Currently, the most common method for on-site core sampling is percussion sampling using a ring cutter. However, for Class IV and Class V surrounding rock, due to the high fragility of the rock mass, the sampling process can lead to core damage or incompleteness, failing to reflect the true characteristics and state of the rock mass. Furthermore, the large-scale sampling process can disturb the surrounding rock, causing damage to the original rock mass. Summary of the Invention

[0004] This invention provides a multi-layer electric ring cutter device and sampling method for sampling extremely fractured rock masses. It enables complete mining of core samples from extremely fractured rock masses, avoids disturbance and damage to the rock mass during sample mining, and can simultaneously mine rock samples of different sizes and heights for various laboratory tests. It can obtain more comprehensive information on the characteristics of the surrounding rock, avoids repeated mining, and is simple, convenient and easy to operate.

[0005] The technical solution of the multi-layer electric ring cutter device for sampling extremely fractured rock masses according to the present invention is as follows: it includes a power supply, a power unit, a gear adjustment device, a gear transmission box, a top cover, an outer vertical ring cutter, an inner vertical ring cutter, a circumferential wall, and a transverse ring cutter. The power supply is connected to the gear adjustment device, which is connected to the power unit. The power unit is connected to the gear transmission box. The bottom of the gear transmission box is provided with a top cover. The outer vertical ring cutter, the inner vertical ring cutter, and the circumferential wall are arranged under the top cover. The transverse ring cutter is arranged under the circumferential wall. The output shaft of the gear transmission box passes through the top cover and connects to the outer vertical ring cutter, the inner vertical ring cutter, and the circumferential wall.

[0006] Furthermore, the power unit is a rotary motor and a lifting motor.

[0007] Furthermore, the outer vertical ring cutter consists of three or more pieces, and the vertical cross-section of the outer vertical ring cutter is a right-angled triangle with a pointed bottom and a thicker top.

[0008] Furthermore, there are two or more inner vertical ring cutters, and the inner vertical ring cutters are located inside the outer vertical ring cutters.

[0009] Furthermore, the transverse ring cutter consists of three or more pieces, with one end of the transverse ring cutter rotatably connected to the bottom of the circumferential wall via a pivot, and a tension spring is provided between the outer wall of the circumferential wall and the circumferential wall.

[0010] The technical solution of the sampling method of the multi-layer electric ring cutter device for sampling extremely fractured rock mass according to the present invention includes the following steps: S1: Align the top cover with the rock mass to be sampled and determine the length of the rock sample to be taken from that part; S2: Adjust the gear of the rotary motor and the lifting motor through the gear adjustment device to control the rotation and extension of the cutter head of the outer vertical ring cutter; S3: The outer vertical ring cutter stops rotating and descending after the cutter head reaches the target height. S4: Retract the outer vertical ring cutter, adjust the circumferential wall extension, and complete the wrapping of the entire rock sample to be cut; S5: Adjust the gear of the rotary motor to control the rotation and ejection of the transverse ring cutter head; S6: After the transverse ring cutter head completes the cutting, the entire large rock sample is sampled; S7: Adjust the gears of the rotary motor and the lifting motor to control the rotation and extension of the inner vertical ring cutter head, and complete the cutting and preparation of rock core samples of different sizes.

[0011] The beneficial effects of the multi-layer electric ring cutter device and sampling method for sampling extremely fractured rock masses of the present invention are as follows: 1. This scheme enables the complete extraction of core samples from extremely fractured rock masses, avoiding disturbance and damage to the rock mass during sample extraction, and ensuring non-destructive extraction of rock samples; 2. This solution uses an electric motor to control the rotation and extension of the ring cutter. By adjusting the motor gear, the extension length and speed of the ring cutter can be controlled. It is simple, convenient and easy to operate, reduces manual labor input, and speeds up the rock sample extraction efficiency. 3. This method can simultaneously extract rock samples of different sizes and heights for various indoor tests, which can more comprehensively obtain the characteristics of the surrounding rock and avoid repeated mining. Attached Figure Description

[0012] Figure 1This is a schematic diagram illustrating the structural principle of a multi-layer electric ring cutter device for sampling extremely fractured rock masses according to the present invention. Figure 2 This is a bottom view showing the arrangement and distribution of the inner vertical ring cutters on the top surface of the cap; Figure 3 This is a bottom view of a horizontal ring cutter installed at the bottom of the circumferential enclosure; Figure 4 This is a bottom-view diagram of the horizontal ring cutter in its rotated and popped-out state; Figure 5 This is a schematic diagram of the outer layer vertical ring cutter arrangement; Figure 6 This is a schematic diagram of the arrangement of the inner layer vertical ring cutters and the horizontal ring cutters.

[0013] In the diagram: 1. Power supply; 2. Rotary motor; 3. Lifting motor; 4. Gear adjustment device; 5. Gear transmission box; 6. Top cover; 7. Outer vertical ring cutter; 8. Inner vertical ring cutter; 9. Circumferential enclosure; 10. Horizontal ring cutter; 11. Tension spring. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote elements with the same or similar functions throughout. However, it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present invention. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present invention.

[0015] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "set," "equipped with," "installed," "connected," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral construction; 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, or an internal connection between two mechanisms, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0016] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the mechanism 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 the invention. The terms "first" and "second" are also used only for the sake of brevity in description and do not indicate or imply relative importance.

[0017] To further illustrate the content, features, and effects of this invention, the invention will be described in detail below with reference to the accompanying drawings and examples, but this should not be construed as limiting the invention.

[0018] This invention relates to a multi-layer electric ring cutter device for sampling extremely fractured rock masses, such as... Figure 1 — Figure 6 As shown, it includes a power supply 1, a power unit, a gear adjustment device 4, a gear transmission box 5, a top cover 6, an outer vertical ring cutter 7, an inner vertical ring cutter 8, a circumferential enclosure 9, and a transverse ring cutter 10.

[0019] The power source 1 is an outdoor mobile power source. Due to the environmental limitations at the sampling site, the outdoor power source can provide good power. The power source 1 provides electrical energy to the rotary motor 2 and the lifting motor 3.

[0020] The power supply 1 is connected to the gear adjustment device 4. The gear adjustment device 4 adjusts the speed and rotation time of the rotary motor 2 and the lifting motor 3 by adjusting the gear to control the speed and extension length of the outer vertical ring cutter 7, the inner vertical ring cutter 8, the circumferential wall 9, and the transverse ring cutter 10.

[0021] The gear adjustment device 4 is connected to the power device, which consists of a rotary motor 2 and a lifting motor 3 that provide power to the entire ring cutter device. The rotary motor 2 controls the rotation of the outer vertical ring cutter 7, the inner vertical ring cutter 8, the circumferential wall 9, and the transverse ring cutter 10. The lifting motor 3 controls the extension and pop-out lengths of the outer vertical ring cutter 7, the inner vertical ring cutter 8, and the circumferential wall 9, thereby controlling the length of the rock sample.

[0022] The power unit is connected to the gear transmission box 5, which is internally connected by multiple gears to transmit the power output from the rotary motor 2 and the lifting motor 3.

[0023] The lower part of the gear transmission box 5 is provided with a top cover 6, which is the top cover of the rock sample. The top cover 6 is made of stainless steel with a smooth surface. Multiple circular holes are pre-drilled on the top cover 6 to facilitate the rotation and extension of the inner vertical ring cutter. The specific pre-drilling of the holes and the arrangement of the inner vertical ring cutter are as follows: Figure 3 As shown.

[0024] The top cover 6 is provided with an outer vertical ring cutter 7, an inner vertical ring cutter 8, and a circumferential enclosure 9.

[0025] The outer vertical ring cutter 7 is a rotating cutter head located at the outer edge of the top cap 6, controlling the size of the large rock sample. The outer vertical ring cutter 7 forms a circle with a diameter of 300mm. The rotation speed and extension length of the outer vertical ring cutter 7 are controlled by a rotary motor 2 and a lifting motor 3. The outer vertical ring cutter 7 can extend up to 200mm, and the specific extension length can be adjusted by the lifting motor 3. The vertical cross-section of the rotating cutter head of the outer vertical ring cutter 7 is a right-angled triangle with a pointed bottom and a thicker top. The arrangement and rotation extension principle of the outer vertical ring cutter 7 are as follows. Figure 5 As shown in the figure, the outer vertical ring cutter 7 is performing rotary cutting sampling to ensure that there is enough space to arrange the circumferential wall 9 after rotary cutting. The outer vertical ring cutter 7 is made of stainless steel to ensure that the ring cutter has sufficient strength and greatly reduces the damage to the ring cutter itself by the rock mass during the cutting process.

[0026] The inner vertical ring cutter 8 is a rotating cutter head, forming multiple circles of different sizes, arranged inside the outer vertical ring cutter 7. The arrangement and number of the inner vertical ring cutters 8 on the top cover 6 are as follows: Figure 2 and Figure 6 As shown, the inner vertical ring cutters 8 form a circle with the following diameters and corresponding quantities: 4 with a diameter of 25mm, 3 with a diameter of 50mm, 2 with a diameter of 75mm, and 1 with a diameter of 100mm. The inner vertical ring cutters 8 are all connected to the rotary motor 2 and the lifting motor 3 through the gear transmission box 5, thereby controlling the rotation and extension length of the rotating head of the inner vertical ring cutter 8. The inner vertical ring cutters 8 are made of stainless steel to ensure that the ring cutters have sufficient strength and greatly reduce the damage to the ring cutters themselves caused by the rock mass during the cutting process.

[0027] The circumferential wall 9 encloses the entire rock sample. On the outside of the device, the circumferential wall 9 can be adjusted to extend outwards, such as... Figure 1 and Figure 5 As shown, before the outer vertical ring cutter 7 completes the rock sample cutting, the circumferential wall 9 does not extend inside the device. After the outer vertical ring cutter 7 completes the rock sample cutting, the cutter head is retracted, and the circumferential wall 9 is adjusted to extend and wrap around the entire rock sample to be cut. The circumferential wall 9 has a certain thickness (up to 8mm), and the material of the circumferential wall 9 is stainless steel to avoid the erosion of the circumferential wall by the harsh rock environment.

[0028] A transverse ring cutter 10 is installed below the circumferential wall 9. The transverse ring cutter 10 is located on the bottom surface of the circumferential wall 9 and does not extend outward. One end of the transverse ring cutter 10 is rotatably connected to the bottom of the circumferential wall 9 via a pivot. A tension spring 11 is installed between the outer wall of the transverse ring cutter 10 and the circumferential wall 9. The transverse ring cutter 10 is a retractable rotating cutter head. The arrangement and distribution of the transverse ring cutters 10 on the bottom surface of the circumferential wall are as follows. Figure 6 As shown, when the circumferential wall 9 rotates, it drives the transverse ring cutter 10 to rotate. As the rotation speed gradually increases, the centripetal force of the transverse ring cutter 10 can overcome the tension of the tension spring 11, causing the transverse ring cutter 10 to pop out. The transverse ring cutter 10 pops out radially and rotates. After the circumferential wall 9 has finished wrapping the rock sample, the rotation power motor 2 is adjusted to control the rotation of the circumferential wall 9. The circumferential wall 9 drives the transverse ring cutter 10 to rotate and pop out, completing the transverse cutting of the rock sample. The principle diagram of the transverse ring cutter 10 popping out is shown below. Figure 3 and Figure 4 As shown, when the rotation speed of the circumferential wall 9 decreases or stops, the tension spring 11 drives the transverse ring cutter 10 to reset under the action of tension. The edges of the transverse ring cutter 10 blades are all serrated to better complete the cutting of the rock sample and reduce damage to the original rock mass. The transverse ring cutter 10 is made of stainless steel to ensure that the ring cutter has sufficient strength and greatly reduces the damage of the rock mass to the ring cutter itself during the cutting process.

[0029] Furthermore, the power unit is a rotary motor 2 and a lifting motor 3.

[0030] Furthermore, the outer vertical ring cutter 7 consists of three or more pieces, and the vertical cross-section of the outer vertical ring cutter 7 is a right-angled triangle with a pointed bottom and a thicker top.

[0031] Furthermore, there are two or more inner vertical ring cutters 8, and the inner vertical ring cutters 8 are located inside the outer vertical ring cutters 7.

[0032] Furthermore, the transverse ring cutter 10 has three or more pieces, one end of which is rotatably connected to the bottom of the circumferential wall 9 via a pivot, and a tension spring 11 is provided between the outer wall of the circumferential wall 9 and the circumferential wall 9.

[0033] This invention relates to a sampling method using a multi-layer electric ring cutter device for sampling extremely fractured rock masses, comprising the following steps: S1: Align the top cover 6 with the rock mass to be sampled and determine the length of the rock sample to be taken from that part; S2: Adjust the gears of the rotary motor 2 and the lifting motor 3 by adjusting the gear adjustment device 4 to control the rotation and extension of the cutter head of the outer vertical ring cutter 7; S3: The outer vertical ring cutter 7 stops rotating and descending after its head reaches the target height. S4: Retract the outer vertical ring cutter 7, adjust the circumferential wall extension 9, and complete the wrapping of the entire rock sample to be cut; S5: Adjust the rotary motor to the second gear to control the rotation and ejection of the transverse ring cutter head 10; S6: After the cutting head of the transverse ring cutter 10 completes the cutting, the entire large rock sample is sampled. S7: Adjust the gears of the rotary motor 2 and the lifting motor 3 to control the rotation and extension of the inner vertical ring cutter 8, and complete the cutting and preparation of rock core samples of different sizes.

[0034] Although the embodiments of this application disclose the above-described methods, the content is merely an implementation method adopted for ease of understanding. Any person skilled in the art should understand that any modifications and changes in the form and details of the implementation can be made without departing from the spirit and scope of the present invention. However, the scope of patent protection of the present invention shall still be determined by the scope defined in the appended claims.

Claims

1. A multi-layer electric ring cutter device for sampling extremely fractured rock masses, characterized in that: The device includes a power supply (1), a power unit, a gear adjustment device (4), a gear transmission box (5), a top cover (6), an outer vertical ring cutter (7), an inner vertical ring cutter (8), a circumferential wall (9), and a transverse ring cutter (10). The power supply (1) is connected to the gear adjustment device (4), the gear adjustment device (4) is connected to the power unit, the power unit is connected to the gear transmission box (5), the gear transmission box (5) is provided with a top cover (6) at the bottom, the top cover (6) is provided with an outer vertical ring cutter (7), an inner vertical ring cutter (8), and a circumferential wall (9), and the circumferential wall (9) is provided with a transverse ring cutter (10) at the bottom. The output shaft of the gear transmission box (5) passes through the top cover (6) and connects to the outer vertical ring cutter (7), the inner vertical ring cutter (8), and the circumferential wall (9).

2. The multi-layer electric ring cutter device for sampling extremely fractured rock masses as described in claim 1, characterized in that: The power unit is a rotary motor (2) and a lifting motor (3).

3. The multi-layer electric ring cutter device for sampling extremely fractured rock masses as described in claim 1, characterized in that: The outer vertical ring cutter (7) consists of three or more pieces, and the vertical cross-section of the outer vertical ring cutter (7) is a right triangle with a pointed bottom and a thicker top.

4. The multi-layer electric ring cutter device for sampling extremely fractured rock masses as described in claim 1, characterized in that: There are two or more inner vertical ring cutters (8), and the inner vertical ring cutters (8) are located inside the outer vertical ring cutters (7).

5. A multi-layer electric ring cutter device for sampling extremely fractured rock masses as described in claim 1, characterized in that: The transverse ring cutter (10) consists of three or more pieces. One end of the transverse ring cutter (10) is rotatably connected to the bottom of the circumferential wall (9) via a rotating shaft. A tension spring (11) is provided between the outer wall of the circumferential wall (9) and the circumferential wall (9).

6. A sampling method using a multi-layer electric ring cutter device for sampling extremely fractured rock masses, characterized in that: Includes the following steps, S1: Align the top cover (6) with the rock mass to be sampled and determine the length of the rock sample to be taken from that part; S2: Adjust the gear of the rotary motor (2) and the lifting motor (3) by adjusting the gear adjustment device (4) to control the rotation and extension of the cutter head of the outer vertical ring cutter (7); S3: The outer vertical ring cutter (7) stops rotating and descending after the cutter head reaches the target size height; S4: Retract the outer vertical ring cutter (7), adjust the circumferential wall extension (9), and complete the wrapping of the entire rock sample to be cut; S5: Adjust the gear of the rotary motor (2) to control the rotation and ejection of the transverse ring cutter (10); S6: After the cutting head of the transverse ring cutter (10) completes the cutting, the entire large rock sample is sampled; S7: Adjust the gear of the rotary motor (2) and the lifting motor (3) to control the rotation and extension of the inner vertical ring cutter (8) to complete the cutting and preparation of rock core samples of different sizes.

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