Core drilling sampling device

Abstract

The invention relates to the technical field of engineering detection sampling, and particularly discloses a core drilling sampling device which comprises a driving assembly, a sampling assembly and a limiting assembly, the sampling assembly comprises an outer cylinder and two arc plates, the two arc plates are arranged in a sliding mode in the radial direction of the axis of the outer cylinder, and the limiting assembly is arranged on the two arc plates. The driving shaft enables the outer cylinder to rotate, a sample core is cut out in a target area, after the sample core is cut to a designated depth, the limiting assembly cuts off the bottom end of the sample core, the two arc plates are made to move towards the axis of the outer cylinder, and the two arc plates are closed to form a complete cylinder to clamp the sample core; according to the core drilling sampling device, the arc plate and the limiting assembly are arranged, when the sample core is cut, the limiting assembly is used for cutting off the bottom of the sample core, the bottom of the sample core is supported, and the arc plate clamps the sample core to keep the integrity of the sample core.

Description

Technical Field

[0001] The invention relates to the technical field of engineering detection sampling, and in particular to a core drilling sampling device. Background Art

[0002] Engineering survey is an important preliminary work for engineering construction, which mainly includes research and identification of geological and geographical environmental characteristics of the engineering construction site, as well as mapping, exploration, testing and comprehensive evaluation of topographic, geological and hydrological elements, providing basic data required for feasibility evaluation and construction. The main tasks of engineering survey include determining the feasibility of engineering construction, providing a basis for engineering design, formulating construction plans, evaluating engineering construction costs, and ensuring engineering quality and safety. A core sampling and detection device will be used in engineering survey. The driving shaft end of the sampling device is connected to the end of the drill sleeve. The lower end face of the drill sleeve is provided with a saw cut in a ring. When the driving shaft rotates, it drives the drill sleeve to rotate, and the lower end of the drill sleeve is pressed against the area to be sampled. Under the high-speed rotation of the saw cut, the drill sleeve is quickly drilled into the sampling area. After drilling to a certain depth, the sampling device is pulled upward, so that the drill sleeve and the subgrade soil layer inserted inside are pulled out of the borehole, and the subgrade soil layer is taken out of the drill sleeve, and the sample core in the drill sleeve is taken out by knocking the drill sleeve.

[0003] A Chinese patent application document with publication number CN112284808A discloses a highway engineering core sampling device, including a frame, a driving mechanism installed on the frame for providing power, a lifting mechanism driven by the driving mechanism and vertically lifted and lowered inside the frame, a sampling mechanism for core sampling, a sample storage mechanism for storing samples taken out by the sampling mechanism, and a switching structure for driving a turntable of the storage sampling mechanism to rotate.

[0004] In the related art, when coring, the core is usually directly lifted up by a coring device to be taken out. However, due to the gap between the core and the barrel, the core is easy to fall and cannot be taken out with the barrel. For the core in the barrel, the prior art often uses knocking to make the core fall off from the barrel, but this can easily damage the core and affect the integrity of the core. Summary of the invention

[0005] The present invention provides a core sampling device, which aims to solve the technical problems in the related art that the core sample is easily dropped due to the gap between the core sample and a cylinder body when the core sample is directly taken out by lifting up the core sampling device, and the core sample cannot be taken out with the cylinder body, and the related art often uses knocking to make the core sample fall off from the cylinder body, which easily causes damage to the core sample.

[0006] A core drilling sampling device of the present invention comprises a driving component and a sampling component arranged at the output end of the driving component, wherein the sampling component comprises an outer cylinder and two arc plates, the two arc plates are symmetrically arranged on the inner side of the outer cylinder along the axis of the outer cylinder, the two arc plates are slidably arranged along the radial direction of the axis of the outer cylinder, a limiting component is arranged on the two arc plates, the limiting component comprises a cutting line, a pulling line and a guide block, the outer side wall of the arc plate is provided with a spiral groove for accommodating the pulling line, a guide hole for sliding the guide block is opened at the lower end of the arc plate, the pulling line is fixedly connected to one end of the guide block, the cutting line is fixedly connected to the other end of the guide block, a notch is arranged on one side where the two guide holes are close to each other, the diameter of the pulling line is larger than the width of the notch, the diameter of the cutting line is smaller than the width of the notch, an elastic member for resetting is arranged between the other end of the cutting line and the arc plate, when coring, the pulling line causes the guide block to slide along the guide hole, the two cutting lines extend out of the notch, the cutting line cuts the bottom end of the sample core, and the two arc plates are closed to form a complete cylinder to clamp the sample core.

[0007] The effect is that by arranging the arc plate and the limit assembly, when the sample core is taken out with the device, the limit assembly can be used to cut off the bottom of the sample core and support the bottom of the sample core. The arc plate clamps the sample core to maintain the integrity of the sample core, and the sample core can be better taken out with the outer cylinder. When the sample core is taken out from the sampling device, the limit assembly is reset to release the restriction on the sample core, and the arc plate is reset to no longer clamp the sample core. The sample core no longer needs to be knocked and can be taken out directly, reducing the problem of sample core breakage caused by coring.

[0008] Preferably, an annular sawtooth is provided at the lower end of the outer cylinder, and the inner diameter of the sawtooth is smaller than the inner diameter of the outer cylinder. The diameter of the cylinder formed by the closure of the two arc plates is the same as the inner diameter of the sawtooth. The effect is that by providing sawtooth with a smaller inner diameter, when the device is cutting the sample core, the limit assembly and the arc plate can avoid the sample core, thereby reducing interference with the sample core.

[0009] Preferably, there are two spiral grooves, which are symmetrically arranged on two arc plates, the lower ends of the spiral grooves are connected to the guide holes, the guide holes are arranged at the bottom of the arc plates, and the incisions are arranged on the inner walls of the arc plates and are connected to the guide holes.

[0010] Preferably, there are two pull wires, which are slidably arranged in the spiral groove respectively, and the upper ends of the two pull wires are connected to the wire take-up device, which is arranged at the upper end of the outer cylinder to control the retraction and release of the pull wires, and the lower ends of the pull wires are fixedly connected to the guide block, and the guide block slides along the guide hole, and the other end of the guide block is fixedly connected to the cutting wire, and the elastic member is arranged between the cutting wire and the arc plate. In the initial state, the elastic member makes the cutting wire located in the inner cylinder, and the guide block is located on one side of the elastic member.

[0011] Preferably, the outermost side of the saw teeth protrudes from the outer tube in a top view, which has the effect of reducing the friction between the outer wall of the outer tube and the cutting hole when cutting the sample core, reducing equipment loss and increasing the service life of the equipment.

[0012] Preferably, the inner wall of the arc plate is provided with an annular protrusion, which increases the direct friction between the arc plate and the sample core when coring. The effect is that by providing the annular protrusion on the inner wall of the arc plate, the clamping force on the sample core can be increased during coring, making the sample core more stable.

[0013] Preferably, rollers are provided on the upper and lower sides of the guide block, and the effect is that by providing the rollers, the resistance to the movement of the guide block is reduced, the force on the pull wire is reduced, and its service life is increased.

[0014] Preferably, a limiting block is provided between the cutting line and the elastic member, and the diameter of the limiting block is larger than the guide hole.

[0015] The beneficial effects of the present invention are: 1. By setting the arc plate and the limit assembly, the bottom of the sample core is cut off by the limit assembly when cutting the sample core, and the bottom of the sample core is supported. The arc plate clamps the sample core to maintain the integrity of the sample core, and the sample core can be better taken out with the outer cylinder. The inner wall of the arc plate is provided with an annular protrusion, which can increase the clamping force on the sample core when coring, making the sample core more stable.

[0016] 2. When the sample core is taken out from the sampling device, the limit assembly is reset to release the restriction on the sample core, and the arc plate is reset to no longer clamp the sample core. The sample core no longer needs to be knocked and can be taken out directly, reducing the problem of sample core breakage caused by coring.

[0017] 3. The outermost protrusion of the saw teeth is set on the outer cylinder, which can reduce the friction between the outer wall of the outer cylinder and the cutting hole when cutting the sample core, reduce equipment loss, and increase the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the sampling device.

[0019] Figure 2 It is a schematic diagram of the structure of the sampling component.

[0020] Figure 3 is a partial cross-sectional view of the sampling assembly.

[0021] Figure 4 It is a schematic diagram of the structure when two arc plates are assembled into a cylinder.

[0022] Figure 5 It is a structural diagram of the arc plate.

[0023] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of part A.

[0024] Figure 7 It is a structural diagram of the limit assembly.

[0025] Figure 8 yes Figure 7 Schematic diagram of the enlarged structure of part B.

[0026] Reference numerals: 1. Driving assembly; 11. Connecting seat; 12. Driving shaft; 2. Sampling assembly; 21. Outer cylinder; 211. Sawtooth; 212. Limiting block; 22. Arc plate; 221. Spiral groove; 222. Guide hole; 223. Incision; 23. Wire take-up device; 3. Limiting assembly; 31. Cutting line; 32. Pulling line; 33. Guide block. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0028] like Figures 1 to 8 As shown, a core sampling device of the present invention comprises a driving component 1, a sampling component 2 and a limiting component 3. The driving component 1 comprises a connecting seat 11 and a driving shaft 12. The device is connected to a mobile device through the connecting seat 11. The sampling component 2 comprises an outer cylinder 21 and two arc plates 22. The outer cylinder 21 is fixedly connected to the lower end of the driving shaft 12. The outer cylinder 21 performs core sampling on the target area under the action of the driving shaft 12. The two arc plates 22 are slidably arranged in the radial direction of the axis of the outer cylinder 21. The limiting component 3 is The positioning component 3 is arranged on two arc plates 22. When coring, the driving shaft 12 rotates the outer cylinder 21 to cut a sample core in the target area. After cutting to the specified depth, the limiting component 3 cuts off the bottom end of the sample core and moves the two arc plates 22 toward the axis of the outer cylinder 21. The two arc plates 22 close to form a complete cylinder to clamp the sample core. When the sample core is taken out of the outer cylinder 21, when the limiting component 3 is reset, the two arc plates 22 are reset to make the clamped sample core escape from the outer cylinder 21 to complete the sampling.

[0029] like Figures 2 to 8As shown, an annular sawtooth 211 is provided at the lower end of the outer cylinder 21, and the sample core and the soil layer are cut during sampling. The inner diameter of the sawtooth 211 is smaller than the inner diameter of the outer cylinder 21, and the diameter of the cylinder formed by the closing of the two arc plates 22 is the same as the inner diameter of the sawtooth 211. An annular protrusion is provided on the inner side of the arc plate 22 to increase the clamping force of the arc plate 22 on the sample core. When the sawtooth 211 cuts the soil layer, the two arc plates 22 are respectively close to the inner wall of the outer cylinder 21, and the arc plate 22 does not contact the sample core. The outermost side of the sawtooth 211 protrudes from the outer cylinder 21 in a top-down perspective. When the sawtooth 211 cuts the soil layer, the friction between the outer wall of the outer cylinder 21 and the soil layer is reduced to improve the stability of the equipment and increase the service life of the equipment.

[0030] like Figures 3 to 8 As shown, the limiting assembly 3 includes a cutting wire 31, a pulling wire 32 and a guide block 33. The pulling wire 32 is fixedly connected to one end of the guide block 33, and the cutting wire 31 is fixedly connected to the other end of the guide block 33. The outer wall of the arc plate 22 is provided with a spiral groove 221 for accommodating the pulling wire 32. The lower end of the arc is provided with a guide hole 222 for the guide block 33 to slide. A cutout 223 is provided on the side where the two guide holes 222 are close to each other. The two cutouts 223 are arranged opposite to each other. The diameter of the pulling wire 32 is larger than the width of the cutout 223, and the pulling wire 32 can only slide in the guide hole 222. The diameter of the cutting wire 31 is smaller than the width of the cutout 223. When the sliding block moves, the cutting wire 31 will move along the cutout 223 toward the axial position of the outer cylinder 21. An elastic member for resetting the cutting wire 31 is provided between the other end of the cutting wire 31 and the arc plate 22. The elastic member is preferably a spring for resetting the cutting wire 31.

[0031] like Figures 2 to 8 As shown, there are two spiral grooves 221, and the two spiral grooves 221 are symmetrically arranged on the two arc plates 22. The lower end opening of the spiral groove 221 is connected to the guide hole 222. The guide hole 222 is arranged at the bottom of the arc plate 22 and is in an arc shape. The incision 223 is arranged on the inner wall of the arc plate 22 and is connected to the guide hole 222. The other end of the guide hole 222 is provided with a receiving groove for accommodating an elastic member. The elastic member expands and contracts in the receiving groove. A limit block 212 is arranged between the cutting line 31 and the elastic member. The limit block 212 slides in the receiving groove. The limit block 212 allows the elastic member to slide only in the receiving groove.

[0032] like Figures 1 to 8As shown, two pull wires 32 are provided, and the two pull wires 32 are respectively slidably set in the spiral groove 221, and the upper ends of the two pull wires 32 are connected with the wire take-up device 23, and the wire take-up device 23 is set on the outer cylinder 21 and is coaxially set with the outer cylinder 21, and the wire take-up device 23 controls the retraction and release of the pull wire 32, and the lower end of the pull wire 32 is fixedly connected to the guide block 33, and the guide block 33 is slidably set in the guide hole 222, and rollers are provided at the upper and lower ends of the guide block 33 to reduce the sliding resistance of the guide block 33 in the guide hole 222, increase the stability of the operation of the lifting device, and increase the service life of the device, the other end of the guide block 33 is fixedly connected to the cutting line 31, and in the initial state, the cutting line 31 is located in the accommodating groove, the elastic member is in a natural state, the guide block 33 is located on one side of the elastic member, and the pull wire 32 is located in the guide hole 222 to seal the incision 223 to prevent impurities and the like from entering the guide hole 222.

[0033] The implementation principle of this embodiment is that the sampling device is fixed to the mobile device through the connecting seat 11. When the core sampling is performed, the driving shaft 12 drives the outer cylinder 21 to rotate, and the sawtooth 211 cuts the target area downward to make the sample core enter the two arc plates 22. After the sample core in the arc plate 22 reaches the sampling standard, the wire take-up device 23 shrinks the pull wires 32 on both sides, and the pull wires 32 on both sides make the guide block 33 slide along the guide hole 222. The cutting wire 31 connected to the guide block 33 moves outward from the receiving groove, and passes through the guide hole 222. The incision 223 extends into the two arc plates 22 to cut the sample core in the arc plates 22. After the cutting is completed, the two cutting lines 31 are located at the bottom of the sample core. At the same time, the two arc plates 22 are close to each other to clamp the sample core, and the sample core is taken out from the cutting hole. When the sample core is taken out from the sampling device, the wire take-up device 23 resets the pull wires 32 on both sides, and the elastic part at the rear end of the cutting line 31 resets the pull wire 32, and the sliding block resets to the initial position. The two arc plates 22 move away from each other to take the sample core out of the sampling device, and the sampling is completed.

[0034] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A core sampling device, comprising a drive assembly (1), a sampling assembly (2) arranged at an output end of the drive assembly (1), characterized in that: The sampling assembly (2) comprises an outer cylinder (21) and two arc plates (22), the two arc plates (22) being symmetrically arranged on the inner side of the outer cylinder (21) along the axis of the outer cylinder (21), the two arc plates (22) being slidably arranged along the radial direction of the axis of the outer cylinder (21), a limiting assembly (3) being arranged on the two arc plates (22), the limiting assembly (3) comprising a cutting wire (31), a pulling wire (32) and a guide block (33), the outer side wall of the arc plate (22) being provided with a spiral groove (221) for accommodating the pulling wire (32), the lower end of the arc plate (22) being provided with a guide hole (222) for the guide block (33) to slide, the pulling wire (32) being fixedly connected to the guide block (33) The guide block (33) is provided with a cutting wire (31) at one end thereof, the cutting wire (31) is fixedly connected to the other end of the guide block (33), a notch (223) is provided on the side where the two guide holes (222) are close to each other, the diameter of the pulling wire (32) is larger than the width of the notch (223), the diameter of the cutting wire (31) is smaller than the width of the notch (223), an elastic member for resetting is provided between the other end of the cutting wire (31) and the circular arc plate (22), when coring, the pulling wire (32) causes the guide block (33) to slide along the guide hole (222), the two cutting wires (31) extend from the notch (223), the cutting wire (31) cuts the bottom end of the sample core, and the two circular arc plates (22) close to form a complete cylinder to clamp the sample core.

2. A core sampling device according to claim 1, characterized in that: The lower end of the outer cylinder (21) is provided with an annular sawtooth (211), the inner diameter of the sawtooth (211) is smaller than the inner diameter of the outer cylinder (21), and the diameter of the cylinder formed by closing the two arc plates (22) is the same as the inner diameter of the sawtooth (211).

3. A core sampling device according to claim 2, characterized in that: Two spiral grooves (221) are provided, and the two spiral grooves (221) are symmetrically arranged on the two arc plates (22); the lower ends of the spiral grooves (221) are connected to the guide holes (222); the guide holes (222) are arranged at the bottom of the arc plates (22); and the cutouts (223) are arranged on the inner wall of the arc plates (22) and are connected to the guide holes (222).

4. A core sampling device according to claim 3, characterized in that: The pull wires (32) are provided with two wires, and the two pull wires (32) are respectively slidably arranged in the spiral groove (221). The upper ends of the two pull wires (32) are connected to the wire take-up device (23). The wire take-up device (23) is arranged at the upper end of the outer cylinder (21) and is used to control the retraction and extension of the pull wires (32). The lower ends of the pull wires (32) are fixedly connected to the guide block (33). The guide block (33) slides along the guide hole (222). The other end of the guide block (33) is fixedly connected to the cutting wire (31). The elastic member is arranged between the cutting wire (31) and the arc plate (22). In the initial state, the elastic member makes the cutting wire (31) located in the inner cylinder, and the guide block (33) is located on one side of the elastic member.

5. A core sampling device according to claim 2, characterized in that: The outermost sides of the saw teeth (211) protrude from the outer cylinder (21) in a top view.

6. A core sampling device according to claim 1, characterized in that: The inner side wall of the arc plate (22) is provided with an annular protrusion, which increases the friction force between the arc plate (22) and the sample core when coring.

7. A core sampling device according to claim 1, characterized in that: Rollers are arranged on the upper and lower sides of the guide block (33).

8. A core sampling device according to claim 4, characterized in that: A limiting block (212) is provided between the cutting line (31) and the elastic member, and the diameter of the limiting block (212) is larger than the guide hole (222).

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