Road detection and drilling integrated drilling cylinder structure and construction method

Abstract

This invention discloses an integrated drilling cylinder structure and construction method for road inspection core sampling, comprising: a drilling cylinder body having an open end and a closed end, the closed end being connected to a drive mechanism, and a through hole formed in the cylinder wall of the drilling cylinder body; multiple cutting teeth formed at the open end, the multiple cutting teeth being spaced apart along the circumference of the drilling cylinder body; and a cutting drill bit, adjustablely installed in the through hole. After the cutting drill bit extends into the drilling cylinder body, it drills into the circumferential surface of the core sample inside the drilling cylinder body. After the drilling cylinder body rotates, the cutting drill bit forms a limiting groove on the circumferential surface of the drilling cylinder body. After the cutting drill bit is embedded in the limiting groove, the drilling cylinder body is lifted, so that the core sample is removed together with the drilling cylinder body. This invention solves the problem of separation of drilling and core sampling processes in existing road inspection core sampling devices.

Description

Technical Field

[0001] This invention relates to the field of road inspection technology, specifically to an integrated drilling cylinder structure for road inspection drilling and coring, and its construction method. Background Technology

[0002] In road inspection, core sampling is a crucial step in assessing pavement structural strength, material properties, and construction quality, providing vital information for maintenance decisions and quality inspections. However, existing road inspection core sampling devices generally suffer from the problem of separating the drilling and core sampling processes. With existing devices, after the drill barrel rotates downwards to a predetermined depth, it must be lifted, and the core sample must be retrieved from the borehole manually or using additional tools. Some devices even require multiple attempts to lift the drill rod, install the core sampling components, and then drill again to complete the core sampling. This process is cumbersome, time-consuming, and labor-intensive. This step-by-step operation not only significantly reduces work efficiency but also greatly increases the risk of core breakage due to impacts or dragging during the sampling process. For sampling from loose areas such as base gravel or subgrade, the core is more likely to fall off, making it difficult to ensure sample integrity. Furthermore, the core sample remaining in the borehole is further complicated by the mud formed by cooling water and sand, making extraction even more difficult. To address the shortcomings of existing equipment, such as separate processes, low efficiency, and poor core integrity, there is an urgent need for an integrated device that can complete drilling and core sampling in one step, thereby simplifying the operation process and improving sampling quality. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, an integrated drilling cylinder structure for road inspection and coring, and its construction method are provided to solve the problem of separation of drilling and coring processes in existing road inspection coring devices.

[0004] To achieve the above objectives, an integrated drilling barrel structure for road inspection core sampling is provided, comprising: The drill barrel body has an open end and a closed end, the closed end is connected to the drive mechanism, and the barrel wall of the drill barrel body has a through hole. Multiple cutting teeth are formed at the opening end, and the multiple cutting teeth are spaced apart along the circumferential direction of the drill barrel body. A cutting drill bit is installed in the through hole in an adjustable position. After the cutting drill bit extends into the drill barrel body, it drills into the circumferential surface of the sample core inside the drill barrel body. After the drill barrel body rotates, the cutting drill bit forms a limiting groove on the circumferential surface of the drill barrel body. After the cutting drill bit is embedded in the limiting groove, the drill barrel body is lifted up, so that the sample core is taken out together with the drill barrel body.

[0005] Furthermore, an assembly hole is formed in the wall of the through hole, and a locking block is elastically installed in the assembly hole. One end of the locking block extends into the through hole. An inner stop ring is coaxially connected to the middle of the cutting drill bit. The inner stop ring has a first side facing the sample core and a second side facing away from the sample core. The outer diameter of the inner stop ring gradually increases from the first side to the second side. One end of the locking block presses against the circumferential side of the inner stop ring. After pushing the cutting drill bit toward the inside of the drill bit body, the locking block is pressed back into the assembly hole by the circumferential side. After the cutting drill bit drills into the circumferential surface of the sample core, the locking block extends into the through hole and abuts against the second side of the inner stop ring to prevent the cutting drill bit from retracting into the through hole.

[0006] Furthermore, an outer stop ring is movably fitted in the middle of the cutting drill bit. An elastic element for pushing the outer stop ring is installed at the end of the cutting drill bit away from the core sample. The outer stop ring has a third side facing the core sample and a fourth side facing away from the core sample. The outer diameter of the outer stop ring gradually decreases from the third side to the fourth side. A pressure-bearing inclined surface is formed on the side of the locking block facing away from the core sample. When the locking block abuts against the second side of the inner stop ring, the outer edge of the outer stop ring presses against the pressure-bearing inclined surface, pressing against the outer stop ring in the direction towards the inside of the drill barrel body so that the outer stop ring fits against the inner stop ring, so that the locking block retracts into the mounting hole so that the cutting drill barrel can retract into the through hole.

[0007] Furthermore, both ends of the through hole are respectively formed with anti-slip flanges facing the inside of the through hole to prevent the inner and outer abutment rings from slipping out of the through hole.

[0008] Furthermore, a tail plate is formed at the tail end of the cutting drill bit away from the core sample, and the elastic element is connected to the tail plate and the outer abutment ring.

[0009] Furthermore, the mounting holes are formed on the walls of the holes on opposite sides of the through hole.

[0010] Furthermore, the cylinder wall of the drill barrel body is formed with a plurality of through holes, which are spaced apart along the circumferential direction of the drill barrel body.

[0011] This invention provides a construction method for an integrated drilling and coring structure for road inspection, comprising the following steps: Connect the closed end of the drill barrel body to the drive mechanism; The drive mechanism is activated, which drives the drill barrel body to rotate in order to cut the road. After the drill barrel body has drilled to the core-taking depth, the position of the cutting drill barrel in the through hole of the drill barrel body is adjusted so that the cutting drill bit extends into the drill barrel body and drills into the circumferential surface of the core sample inside the drill barrel body. Continue rotating the drill barrel body, and the cutting drill bit forms a limiting groove on the circumferential surface of the drill barrel body; After the cutting drill bit is embedded in the limiting groove, the drill barrel body is lifted up so that the sample core is taken out together with the drill barrel body.

[0012] The beneficial effects of this invention are that the integrated drilling and coring structure for road inspection enables integrated drilling and coring, significantly improving operational efficiency. This integrated drilling and coring structure integrates an adjustable cutting drill bit on the drill cylinder body. After drilling to a predetermined depth, the cutting drill bit can be directly adjusted to extend into the cylinder to cut and limit the core sample. Without needing to lift the drill, change tools, or re-drill, the core sample can be removed together with the drill cylinder, simplifying the operation process and significantly shortening the inspection cycle.

[0013] The integrated drilling and coring structure for road inspection of this invention ensures the integrity of the core sample, and is especially suitable for loose strata. The cutting drill bit of this integrated drilling and coring structure forms a limiting groove on the circumference of the core sample and is embedded therein. When the drilling cylinder is lifted, the core sample is firmly locked, avoiding the breakage or loosening caused by traditional core sampling methods such as hammering and dragging. It is particularly suitable for sampling loose areas that are difficult to shape, such as base gravel and subgrade soil.

[0014] The construction method of the integrated drilling and coring structure for road inspection of the present invention is clear and logical, from drilling, cutting head adjustment, and limit groove formation to integrated extraction. It is easy for on-site personnel to quickly master and form a standard operating procedure. Attached Figure Description

[0015] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the integrated drilling and coring structure for road inspection according to an embodiment of the present invention.

[0016] Figure 2 This is a cross-sectional view of the integrated drilling and coring structure for road inspection according to an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of a cutting drill bit according to an embodiment of the present invention.

[0018] Figures 4 to 6 This is a dynamic demonstration diagram of the position adjustment of the cutting drill bit in an embodiment of the present invention.

[0019] Figure label: Drill barrel body 1, locking block 11, through hole a, assembly hole b, pressure-bearing inclined surface c; Cutting tooth 2; Cutting drill bit 3, inner stop ring 31, outer stop ring 32, elastic element 33, tail plate 34. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Reference Figures 1 to 6 As shown, the present invention provides an integrated drilling cylinder structure for road inspection drilling and coring, comprising: a drilling cylinder body 1, cutting teeth 2, and a cutting drill bit 3.

[0023] In this embodiment, the drill barrel body 1 is generally cylindrical. The drill barrel body 1 has an open end and a closed end. The closed end of the drill barrel body 1 is on top, and the open end is on the bottom. The closed end of the drill barrel body 1 is connected to a drive mechanism. The drive mechanism drives the drill barrel body to rotate. A through hole a is formed in the wall of the drill barrel body 1. The through hole penetrates the wall to connect the inner and outer sides of the drill barrel body.

[0024] The number of cutting teeth 2 is multiple. Multiple cutting teeth 2 are formed at the open end of the drill barrel body 1. These multiple cutting teeth 2 are spaced apart along the circumference of the drill barrel body 1. During the rotation of the drill barrel body, the multiple cutting teeth cut the path to obtain the core sample.

[0025] The cutting drill bit 3 is adjustablely installed in the through hole a. During actual road testing, the cutting drill bit is initially positioned within the through hole. When the drill body 1 drills to or is about to reach the target depth, the position of the cutting drill bit in the through hole is adjusted so that it extends into the drill body 1. After the cutting drill bit 3 extends into the drill body 1, it drills into the circumferential surface of the core sample within the drill body 1. After the drill body 1 rotates, the cutting drill bit 3 forms a limiting groove on the circumferential surface of the drill body 1. After the cutting drill bit 3 is embedded in the limiting groove, the drill body 1 is lifted, allowing the core sample to be removed along with the drill body 1.

[0026] See Figure 2 and Figure 3As shown, an assembly hole b is formed inside the wall of the through hole a of the drill barrel body 1. A locking block 11 is elastically installed in the assembly hole b.

[0027] In a preferred embodiment, assembly holes b are formed on the opposite sides of the through hole a.

[0028] In this embodiment, the cylinder wall of the drill barrel body 1 has a plurality of through holes a. The plurality of through holes a are spaced apart along the circumferential direction of the drill barrel body 1.

[0029] One end of the locking block 11 extends into the through hole a, while the other end remains in the assembly hole. The cutting drill bit is positioned along the length of the through hole. The through hole is positioned along the radial direction of the drill barrel body.

[0030] An inner stop ring 31 is coaxially connected to the middle of the cutting drill bit 3. The inner stop ring 31 has a first side facing the core sample and a second side facing away from the core sample. The outer diameter of the inner stop ring 31 gradually increases from the first side to the second side. The inner stop ring is frustoconical in shape.

[0031] One end of the locking block 11 presses against the circumferential side of the inner stop ring 31. After pushing the cutting drill bit 3 toward the inside of the drill bit body, the locking block 11 is pressed back into the mounting hole b by the circumferential side. After the cutting drill bit 3 drills into the circumferential surface of the core sample, the locking block 11 extends into the through hole a and abuts against the second side of the inner stop ring 31 to prevent the cutting drill bit 3 from retracting into the through hole a.

[0032] Continue reading Figure 2 and Figure 3 As shown, an outer stop ring 32 is movably fitted in the middle of the cutting drill bit 3. An elastic element 33 is installed at the end of the cutting drill bit 3 away from the core sample. The elastic element 33 is used to push the outer stop ring 32. The elastic element 33 pushes the outer stop ring towards the inside of the drill barrel body.

[0033] The outer stop ring 32 has a third side facing the sample core and a fourth side facing away from the sample core. The outer diameter of the outer stop ring 32 gradually decreases from the third side to the fourth side. In this embodiment, the outer stop ring is also frustum-shaped. Correspondingly, the shape and size of the outer stop ring are adapted to those of the inner stop ring. A gap is formed between the outer stop ring and the inner stop ring. When the locking block abuts against the second side of the inner stop ring, it is inserted into the gap between the outer stop ring and the inner stop ring.

[0034] A pressure-bearing inclined surface c is formed on the side of the locking block 11 facing away from the core. When the locking block 11 abuts against the second side of the inner stop ring 31, the outer edge of the outer stop ring 32 presses against the pressure-bearing inclined surface c. The outer stop ring 32 is pressed against the inner side of the drill barrel body 1 so that the outer stop ring 32 fits against the inner stop ring 31, so that the locking block 11 retracts into the mounting hole b so that the cutting drill bit can retract into the through hole a.

[0035] In this embodiment, when it is necessary to remove the sample core from the drill barrel body, the outer stop ring is pressed towards the inside of the drill barrel body, so that the outer stop ring presses against the pressure-bearing inclined surface to make the locking block retract into the assembly hole, thereby causing the outer stop ring and the inner stop ring to move towards the outside of the drill barrel body at the same time, so that the cutting drill bit can retract into the through hole, thereby engaging the locking of the sample core.

[0036] Both ends of the through hole a have anti-slip flanges extending into the through hole a. These anti-slip flanges are used to prevent the inner and outer retaining rings 31 and 32 from slipping out of the through hole a. In this embodiment, the anti-slip flanges are annular. The size of the inner annular hole of the anti-slip flange is larger than the minimum outer diameter of the inner and outer retaining rings, but smaller than the maximum outer diameter of the inner and outer retaining rings.

[0037] In a preferred embodiment, a tail plate 34 is formed at the tail end of the cutting drill bit 3, away from the core sample. An elastic element 33 is connected to the tail plate 34 and the outer stop ring 32. In this embodiment, the elastic element is a spring.

[0038] This invention provides a construction method for an integrated drilling and coring structure for road inspection, comprising the following steps: S1. Connect the closed end of the drill barrel body 1 to the drive mechanism.

[0039] S2. Activate the drive mechanism, which drives the drill barrel body 1 to rotate to cut the road.

[0040] S3. After the drill barrel body 1 has drilled to the core-taking depth, adjust the position of the cutting drill barrel in the through hole a of the drill barrel body 1 so that the cutting drill bit 3 extends into the drill barrel body 1 and drills into the circumferential surface of the core sample inside the drill barrel body 1.

[0041] When adjusting the position of the cutting drill bit, push the cutting drill bit toward the inside of the drill barrel body. The circumferential side of the inner stop ring presses against the locking block, causing the locking block to retract into the mounting hole. Then, after the locking block passes around the inner stop ring, it is inserted into the gap between the inner and outer stop rings.

[0042] S4. Continue to rotate the drill barrel body 1, and the cutting drill bit 3 forms a limiting groove on the circumferential surface of the drill barrel body 1.

[0043] S5. After the cutting drill bit 3 is embedded in the limiting groove, the drill barrel body 1 is lifted up so that the sample core is taken out together with the drill barrel body 1.

[0044] When it is necessary to remove the sample core from the drill barrel body, press the outer stop ring towards the inside of the drill barrel body so that the third side of the outer stop ring fits against the second side of the inner stop ring. At this time, pull the cutting drill bit outward from the drill barrel body, and the locking block presses against the circumferential side of the inner stop ring again, causing the cutting drill bit to retract into the through hole. Correspondingly, multiple cutting drill bits release the locking of the sample core.

[0045] The integrated drilling and coring structure for road inspection of this invention enables integrated drilling and coring, significantly improving operational efficiency. By integrating an adjustable cutting drill bit onto the drill cylinder body, this structure allows for direct adjustment of the cutting drill bit after drilling to a predetermined depth, extending it into the cylinder to cut and limit the core sample. This eliminates the need for lifting the drill, changing tools, or re-drilling, allowing the core sample to be removed along with the drill cylinder, simplifying the operation process and significantly shortening the inspection cycle.

[0046] The integrated drilling and coring structure for road inspection of this invention ensures the integrity of the core sample, and is especially suitable for loose strata. The cutting drill bit of this integrated drilling and coring structure forms a limiting groove on the circumference of the core sample and is embedded therein. When the drilling cylinder is lifted, the core sample is firmly locked, avoiding the breakage or loosening caused by traditional core sampling methods such as hammering and dragging. It is particularly suitable for sampling loose areas that are difficult to shape, such as base gravel and subgrade soil.

[0047] The integrated drilling cylinder structure for road inspection drilling and coring of the present invention automatically locks the cutting drill bit after it is inserted through the cooperation of the inner stop ring and the elastic locking block, preventing accidental retraction during drilling or lifting; at the same time, the outer stop ring and the pressure-bearing inclined surface can easily unlock and allow the cutting drill bit to retract into the through hole, facilitating the reuse of the drilling cylinder after the core sample is taken out.

[0048] The anti-detachment flanges at both ends of the through hole of the integrated drilling cylinder structure for road inspection drilling and coring of the present invention can effectively limit the movement range of the inner and outer abutment rings, preventing the cutting drill bit from falling out of the through hole during adjustment or transportation, thereby enhancing the reliability and service life of the device.

[0049] The integrated drilling and coring structure for road inspection of the present invention can be provided with multiple through holes and corresponding cutting drill bits at intervals in the circumferential direction of the drilling cylinder body, so as to simultaneously cut and lock the core sample from multiple directions, so that the core sample is subjected to uniform force during the extraction process, and further reduce the risk of breakage.

[0050] The construction method of the integrated drilling and coring structure for road inspection of the present invention is clear and logical, from drilling, cutting head adjustment, and limit groove formation to integrated extraction. It is easy for on-site personnel to quickly master and form a standard operating procedure.

[0051] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A road inspection drilling and coring integrated drill barrel structure, characterized in that, include: The drill barrel body has an open end and a closed end, the closed end is connected to the drive mechanism, and the barrel wall of the drill barrel body has a through hole. Multiple cutting teeth are formed at the opening end, and the multiple cutting teeth are spaced apart along the circumferential direction of the drill barrel body. A cutting drill bit is installed in the through hole in an adjustable position. After the cutting drill bit extends into the drill barrel body, it drills into the circumferential surface of the sample core inside the drill barrel body. After the drill barrel body rotates, the cutting drill bit forms a limiting groove on the circumferential surface of the drill barrel body. After the cutting drill bit is embedded in the limiting groove, the drill barrel body is lifted up, so that the sample core is taken out together with the drill barrel body.

2. The integrated drilling and coring structure for road inspection according to claim 1, characterized in that, An assembly hole is formed in the wall of the through hole, and a locking block is elastically installed in the assembly hole. One end of the locking block extends into the through hole. An inner stop ring is coaxially connected to the middle of the cutting drill bit. The inner stop ring has a first side facing the sample core and a second side facing away from the sample core. The outer diameter of the inner stop ring gradually increases from the first side to the second side. One end of the locking block presses against the circumferential side of the inner stop ring. After pushing the cutting drill bit toward the inside of the drill bit body, the locking block is pushed back into the assembly hole by the pressure of the circumferential side. After the cutting drill bit drills into the circumferential surface of the sample core, the locking block extends into the through hole and abuts against the second side of the inner stop ring to prevent the cutting drill bit from retracting into the through hole.

3. The integrated drilling and coring structure for road inspection according to claim 2, characterized in that, An outer stop ring is movably fitted in the middle of the cutting drill bit. An elastic element for pushing the outer stop ring is installed at the end of the cutting drill bit away from the core. The outer stop ring has a third side facing the core and a fourth side away from the core. The outer diameter of the outer stop ring gradually decreases from the third side to the fourth side. A pressure-bearing inclined surface is formed on the side of the locking block away from the core. When the locking block abuts against the second side of the inner stop ring, the outer edge of the outer stop ring presses against the pressure-bearing inclined surface and presses against the outer stop ring in the direction towards the inside of the drill body so that the outer stop ring fits against the inner stop ring, so that the locking block retracts into the mounting hole so that the cutting drill can retract into the through hole.

4. The integrated drilling and coring structure for road inspection according to claim 3, characterized in that, Both ends of the through hole have anti-slip flanges extending towards the inside of the through hole to prevent the inner and outer abutment rings from slipping out of the through hole.

5. The integrated drilling and coring structure for road inspection according to claim 3, characterized in that, The cutting drill bit has a tail plate formed at its tail end away from the core sample, and the elastic element is connected to the tail plate and the outer stop ring.

6. The integrated drilling and coring structure for road inspection according to claim 3, characterized in that, The mounting holes are formed on the walls of the holes on opposite sides of the through hole.

7. The integrated drilling and coring structure for road inspection according to claim 1, characterized in that, The cylinder wall of the drill barrel body has a plurality of through holes, which are spaced apart along the circumferential direction of the drill barrel body.

8. A construction method for an integrated drilling and coring structure for road inspection as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Connect the closed end of the drill barrel body to the drive mechanism; The drive mechanism is activated, which drives the drill barrel body to rotate in order to cut the road. After the drill barrel body has drilled to the core-taking depth, the position of the cutting drill barrel in the through hole of the drill barrel body is adjusted so that the cutting drill bit extends into the drill barrel body and drills into the circumferential surface of the core sample inside the drill barrel body. Continue rotating the drill barrel body, and the cutting drill bit forms a limiting groove on the circumferential surface of the drill barrel body; After the cutting drill bit is embedded in the limiting groove, the drill barrel body is lifted up so that the sample core is taken out together with the drill barrel body.

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