Pavement thickness detection coring device for highway engineering

Abstract

The invention relates to the technical field of road detection, in particular to a road surface thickness detection coring device for road engineering. Comprising a supporting frame, the supporting frame is fixedly connected with a sliding frame, the sliding frame is connected with a sliding block in a sliding mode, the sliding frame is rotationally connected with a driving lead screw, the sliding block is fixedly connected with a motor and a liquid pump, the sliding block is rotationally connected with a drill bit and provided with a liquid box, the liquid pump is fixedly connected with and communicated with a first circulation pipe, and the first circulation pipe is communicated with a second circulation pipe. The first runner pipe is rotationally and slidably connected with a rotating disc, and the rotating disc is slidably connected with a cam shell. The top of the core sample pushes the rotating disc, so that the rotating disc drives the cam shell to rotate, the cam shell drives the core sample to swing, the joint between the core sample and the roadbed is disconnected, the vibration influence of a traditional knocking mode on the whole core sample is avoided, the situation of core sample breakage is reduced, the integrity of the core sample is guaranteed, and then the sampling success rate is increased.

Description

Technical Field

[0001] The invention relates to the technical field of highway detection, and in particular to a road surface thickness detection and coring device for highway engineering. Background Art

[0002] In order to ensure the construction quality after the completion of the highway project, it is necessary to use a detection coring device to coring the highway subgrade so as to conduct quality tests such as tensile strength, compression strength, penetration strength, and flexural strength on the collected core samples.

[0003] The existing highway subgrade coring device is equipped with a hollow coring drill bit that can be raised and lowered and has an open bottom. The hollow drill bit rotates at high speed and drills into the subgrade to obtain a core sample. After the highway subgrade coring device drills the subgrade, it is impossible to actively separate the core sample from the subgrade, resulting in difficulty in removing the core sample. The existing solution is mainly to use a hammer to hit the top of the drill bit to make the drill bit vibrate and transmit the vibration to the bottom of the core sample to separate it. However, this knocking method will cause the core sample to be affected by vibration as a whole, and it is difficult to accurately apply the vibration force to the connection between the core sample and the subgrade, resulting in poor separation effect, easy to cause the core sample to break, and destroy the integrity of the core sample, thereby affecting the quality of the core sample and the accuracy of the core sample quality detection. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above background, the present invention provides a road surface thickness detection and coring device for highway engineering.

[0005] The technical solution is: a road thickness detection and coring device for highway engineering, comprising: a support frame, the support frame is fixedly connected to a sliding frame, the sliding frame is slidably connected to a sliding block, the sliding frame is rotatably connected to a driving screw, the driving screw is threadedly connected to the sliding block, the sliding block is fixedly connected to a motor and a liquid pump, the sliding block is rotatably connected to a drill bit, the sliding block is provided with a liquid tank, the liquid tank on the sliding block is communicated with the liquid pump, the output shaft of the motor is connected to the drill bit through a pulley belt drive, the liquid pump is fixedly connected and communicated with a first circulation pipe, the first circulation pipe is rotatably connected and communicated with the drill bit, the first circulation pipe is rotatably and slidably connected to a rotating disk, the rotating disk is slidably connected to a cam shell, the cam shell is in extrusion contact with the drill bit, and the cam shell is used to drive the core sample to rotate; a driving component is arranged in the drill bit, and is used to drive the rotating disk to rotate.

[0006] As a further preferred scheme, the driving assembly includes: a transmission block fixedly connected to the drill bit, a first connecting member rotatably connected to the transmission block, a limiting column slidably connected to the first connecting member, a first elastic member fixedly connected between the limiting column and the first connecting member, a limiting hole is provided on the transmission block, the limiting column is used to limit the transmission block, the rotating disk is fixedly connected to a second connecting member, and the first connecting member is in extrusion contact with the second connecting member.

[0007] As a further preferred solution, inclined surfaces are provided on both sides of the limiting column.

[0008] As a further preferred solution, a limiting rod is fixedly connected to the first circulation pipe, and the limiting rod is used to limit the second connecting member.

[0009] As a further preferred scheme, it also includes: a limit plate, fixedly connected to the rotating disk, and inclined surfaces are provided on both sides of the limit plate; a plurality of rotating shafts, all of which are rotatably connected to the cam housing, and the rotating shaft is rotatably connected to a deflection plate, and a second elastic member is fixedly connected between the deflection plate and the cam housing, and a first clamping ring is fixedly connected to the side of the deflection plate away from the limit plate, and the first clamping ring is used to clamp the core sample, and a slope is provided on the side of the deflection plate away from the first clamping ring, and all of the deflection plates are in extrusion contact with the limit plate.

[0010] As a further preferred scheme, it also includes: at least two first splints, both of which are slidably connected to the drill bit, a third elastic member is fixedly connected between the first splint and the drill bit, and a first through hole is arranged on the first splint; at least two second splints, both of which are slidably connected to the drill bit, a fourth elastic member is fixedly connected between the second splint and the drill bit, a second through hole is arranged on the second splint, a second clamping ring is fixedly connected to the first splint, and all the second splints are staggered with all the first splints.

[0011] As a further preferred solution, a magnetic ring is slidably connected to one side of the second clamping ring close to the center of the drill bit, and two adjacent magnetic rings are magnetically attracted to each other, and the magnetic rings are used to fix the core sample.

[0012] As a further preferred scheme, it also includes: second circulation tubes, the number of which is the same as the sum of the number of the first splints and the second splints, all of which are rotatably connected and connected to the first circulation tube, and embedded in the drill bit, the drill bit is provided with cavities the number of which is the same as the sum of the number of the first splints and the second splints, the first splint and the second splint slide in adjacent cavities respectively, the first through hole on the first splint and the second through hole on the second splint are both connected to adjacent cavities, the second circulation tube is connected to the adjacent cavity, and a fluid pipeline is provided in the drill bit, and the fluid pipeline in the drill bit is connected to the adjacent cavity.

[0013] As a further preferred solution, the bottom of the drill bit is provided with circumferentially distributed flow tubes, the flow tubes are connected to the fluid pipeline in the drill bit, and the flow tubes are used to allow the liquid to flow out from the bottom of the drill bit.

[0014] As a further preferred solution, the bottom of the drill bit is provided with circumferentially distributed cutting edges, and the cutting edges are provided with guide grooves, which gradually deepen along the rotation direction of the drill bit for guiding debris and liquid.

[0015] Compared with the prior art, the present invention has the following advantages: the present invention pushes the rotating disk through the top of the core sample, so that the rotating disk drives the cam shell to rotate, and the cam shell drives the core sample to swing, so that the connection between the core sample and the roadbed is disconnected, thereby enhancing the separation effect of the core sample and the roadbed, avoiding the vibration influence of the traditional knocking method on the whole core sample, reducing the occurrence of core sample breakage, ensuring the integrity of the core sample, and thereby improving the sampling success rate.

[0016] The present invention limits the position of the second connecting member by a limiting rod, thereby limiting the number of rotations of the cam housing, preventing excessive rotation from causing internal stratification of the core sample and generating complex stress, thereby reducing the occurrence of crack expansion and fracture stratification problems inside the core sample.

[0017] The present invention pushes the rotating disk through the top of the core sample so that the first clamping ring clamps the core sample, thereby reducing the relative displacement between the core sample and the cam housing and improving the stability of the cam housing when swinging the core sample.

[0018] The present invention fixes the middle of the core sample when the core sample swings by mutually locking the magnetic rings in the second clamp ring under the action of magnetic force, thereby reducing the influence of the swinging force on the middle of the core sample and improving the integrity of the core sample.

[0019] The present invention extracts liquid through a liquid pump, and the liquid cools the drill bit evenly under the joint action of the first circulation pipe and the second circulation pipe, and the water between the bottom of the drill bit and the roadbed enters the guide groove, thereby increasing the contact area between the liquid flowing out of the circulation pipe and the cutting edge at the bottom of the drill bit, prolonging the residence time of the liquid flowing out of the circulation pipe at the bottom of the drill bit, so that the liquid flowing out of the circulation pipe acts on the bottom of the drill bit more evenly, thereby improving the heat dissipation effect and chip removal effect of the liquid flowing out of the circulation pipe on the bottom of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the sliding frame and the sliding block of the present invention;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the sliding block and the drill bit of the present invention;

[0023] Figure 4 is a three-dimensional structural cross-sectional view of the drill bit of the present invention;

[0024] Figure 5 It is a three-dimensional structural cross-sectional view of the cam housing of the present invention;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the rotating disk of the present invention;

[0026] Figure 7 It is a three-dimensional structural exploded diagram of the rotating disk and the cam housing of the present invention;

[0027] Figure 8 is a schematic diagram of the three-dimensional structure of the first connecting member of the present invention;

[0028] Fig. 9 is a three-dimensional structural cross-sectional view of the first connecting member of the present invention;

[0029] Fig.10 It is a schematic diagram of the three-dimensional structure of the deflection plate of the present invention;

[0030] Fig.11 It is a schematic diagram of the three-dimensional structure of the first clamping plate and the second clamping ring of the present invention;

[0031] Fig.12 It is a schematic diagram of the three-dimensional structure of the magnetic ring of the present invention;

[0032] Fig.13 For the present invention Fig.11 A magnified three-dimensional structure of the first splint at A;

[0033] Fig.14 It is a schematic diagram of the three-dimensional structure of the flow pipe and the guide groove of the present invention.

[0034] Figure markings: 1-support frame, 2-sliding frame, 3-sliding block, 4-driving screw, 5-motor, 6-liquid pump, 7-drill bit, 8-first circulation pipe, 9-rotating disk, 10-cam housing, 21-transmission block, 22-first connecting piece, 221-limiting column, 23-second connecting piece, 31-limiting rod, 41-limiting plate, 42-rotating shaft, 43-deflection plate, 44-first clamping ring, 51-first clamping plate, 52-second clamping plate, 53-second clamping ring, 61-magnetic ring, 71-second circulation pipe, 72-cavity, 81-circulation pipe, 91-guide groove. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with specific embodiments. It should also be noted that, unless otherwise clearly specified and limited, terms such as: setting, installing, and connecting should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Embodiment 1: A road surface thickness detection and coring device for highway engineering, such as Figure 1-Figure 8 As shown, it includes: a support frame 1, the support frame 1 is fixedly connected to a sliding frame 2, the sliding frame 2 is slidably connected to a sliding block 3, the sliding frame 2 is rotatably connected to a driving screw 4, the driving screw 4 is threadedly connected to the sliding block 3, the sliding block 3 is fixedly connected to a motor 5 and a liquid pump 6, the sliding block 3 is rotatably connected to a drill bit 7, a liquid box is arranged in the sliding block 3, the liquid box on the sliding block 3 is connected to the liquid pump 6, the output shaft of the motor 5 is connected to the drill bit 7 through a pulley belt drive, the liquid pump 6 is fixedly connected to and connected to a first circulation pipe 8, the first circulation pipe 8 is rotatably connected and connected to the drill bit 7, the first circulation pipe 8 is rotatably and slidably connected to a rotating disk 9, the rotating disk 9 is slidably connected to a cam shell 10, the cam shell 10 is in extrusion contact with the drill bit 7, and the cam shell 10 is used to drive the core sample to rotate; a driving component is arranged in the drill bit 7, and is used to drive the rotating disk 9 to rotate.

[0037] The above-mentioned method proposes a method of swinging the core sample, which is used to disconnect the connection between the core sample and the roadbed, ensure the integrity of the core sample, and improve the success rate of sampling; the support frame 1 is provided with a lifting lug and a moving wheel, the lifting lug is used to facilitate the user to lift and carry the device, the moving wheel is used to assist the user to move the device, and the moving wheel can be retracted, which is convenient for the user to fix the support frame 1; the sliding frame 2 is composed of two sliding rods and a connecting frame, and the two sliding rods pass through the sliding block 3, so that the sliding block 3 can be lifted and lowered more stably, the connecting frame is rotatably connected to the driving screw 4, and a turntable is provided on the upper end of the driving screw 4; the liquid tank in the sliding block 3 is detachably installed and has a water inlet; the outer side of the drill bit 7 is It is vertically cylindrical, and its internal structure gradually shrinks from top to bottom, and the whole is in the shape of a truncated cone; the rotating disk 9 slides relative to the first circulation tube 8, and when the rotating disk 9 slides to the highest point, the lower end surface of the rotating disk 9 and the lower end surface of the first circulation tube 8 are at the same horizontal height, the outer contour of the cam housing 10 is cam-shaped, and the inner side is circular, and the cam protrusion on the outer side of the cam housing 10 is in compression contact with the drill bit 7, which is used to push the core sample to swing, and there is a gap between the rotating disk 9 and the cam housing 10; the rotation centers of the rotating disk 9, the core sample and the drill bit 7 are located on the same vertical axis, and the rotation center of the base circle on the cam housing 10 does not coincide with the axis of the core sample, so that when the cam housing 10 rotates, the cam housing 10 exerts an extrusion effect on the core sample.

[0038] like Figure 4 , Figure 5 , Figure 8 and Fig. 9 As shown, the driving assembly includes: a transmission block 21, which is fixed to the drill bit 7, a first connecting member 22 is rotatably connected to the transmission block 21, a limiting column 221 is slidably connected to the first connecting member 22, a first elastic member is fixed between the limiting column 221 and the first connecting member 22, a limiting hole is provided on the transmission block 21, the limiting column 221 is used to limit the transmission block 21, a second connecting member 23 is fixedly connected to the rotating disk 9, the first connecting member 22 is in extrusion contact with the second connecting member 23, and inclined surfaces are provided on both sides of the limiting column 221.

[0039] The above-mentioned driving method for driving the cam housing 10 to rotate is used to drive the drill bit 7 to rotate when drilling to the deepest point, so that the cam housing 10 swings the core sample, retains the maximum amount of core sample collection, reduces damage to the core sample, and improves the sampling quality in highway pavement detection coring work; the first elastic member between the limit column 221 and the first connecting member 22 is a spring, and the initial state is a compressed state, which is used to push the limit column 221 to move in the direction close to the transmission block 21; the first flow tube 8 passes through the transmission block 21, and grooves are provided on the lower side of the first connecting member 22 and the upper side of the second connecting member 23; the grooves on the lower side of the first connecting member 22 and the upper side of the second connecting member 23 both have vertical surfaces and inclined surfaces.

[0040] like Figure 4 , Figure 5 and Figure 8 As shown, a limiting rod 31 is fixedly connected to the first flow pipe 8 , and the limiting rod 31 is used to limit the second connecting member 23 .

[0041] The above-mentioned method of limiting the second connecting member 23 is used to prevent the cam housing 10 from excessively rotating, resulting in complex stress caused by internal stratification of the core sample, thereby reducing the occurrence of crack expansion and fracture stratification problems inside the core sample. The limiting rod 31 is used to limit the rotation angle of the second connecting member 23 and is located on the upper side of the rotating disk 9.

[0042] like Figure 5-Figure 8 and Fig.10 As shown, it also includes: a limit plate 41, which is fixedly connected to the rotating disk 9, and both sides of the limit plate 41 are provided with inclined surfaces; there are several rotating shafts 42, which are all rotatably connected to the cam housing 10, and the rotating shaft 42 is rotatably connected to a deflection plate 43, and a second elastic member is fixedly connected between the deflection plate 43 and the cam housing 10, and a first clamping ring 44 is fixedly connected to the side of the deflection plate 43 away from the limit plate 41, and the first clamping ring 44 is used to clamp the core sample, and a slope is provided on the side of the deflection plate 43 away from the first clamping ring 44, and all the deflection plates 43 are in extrusion contact with the limit plate 41.

[0043] The above-mentioned method proposes a method for clamping the core sample, in which the core sample pushes the rotating disk 9 upward, thereby driving the limit plate 41 to move upward, and the limit plate 41 pushes the deflection plate 43 to rotate, and the first clamping ring 44 clamps the core sample, so that the cam housing 10 can more stably drive the core sample to swing; the second elastic member between the deflection plate 43 and the cam housing 10 is a spring, which is used to drive the deflection plate 43 to reset, the inclined surface on the deflection plate 43 has the same slope as the inclined surface on the limit plate 41, and the inclined surface on the deflection plate 43 is in contact with the adjacent inclined surface on the limit plate 41, and the first clamping ring 44 is close to the core sample. The side of the first clamping ring 44 is set to wear-resistant material, which is used to extend the service life of the first clamping ring 44.

[0044] Working principle: When using the device to take coring samples from a road surface, the user first pushes the device to the area to be sampled. After reaching the area to be sampled, the user fixes the support frame 1, and then turns on the motor 5. The motor 5 drives the drill bit 7 to rotate through the pulley belt, and the drill bit 7 drives the transmission block 21 to rotate clockwise (the following rotation direction is based on Figure 1Taking the top view as an example, when the upper limit hole of the transmission block 21 is aligned with the limit column 221, the limit column 221 enters the limit hole of the transmission block 21 under the action of the first elastic member between the limit column 221 and the first connecting member 22, and the limit column 221 limits the transmission block 21. The transmission block 21 drives the first connecting member 22 to rotate clockwise through the limit column 221. After the drill bit 7 reaches the maximum speed, the user rotates the turntable clockwise, and the turntable drives the driving screw 4 to rotate clockwise, and the driving screw 4 drives the sliding block 3 When the drill bit 7 is about to penetrate into the road surface, the user turns on the liquid pump 6, and the liquid pump 6 extracts the liquid in the liquid tank in the sliding block 3 and flows into the drill bit 7 through the first flow pipe 8. The liquid flowing into the drill bit 7 is used to cool the drill bit 7. Then the drill bit 7 gradually extends into the road surface and drills, and the coring work begins. During the coring process, the drill bit 7 keeps moving downward, and the distance between the top of the core sample and the rotating disk 9 gradually decreases. As the drill bit 7 gradually descends, the core sample gradually fills the inside of the drill bit 7. When the drill bit 7 descends to the deepest point, the drill bit 7 is filled with the core sample, and the core sample enters the cam housing 10. The top of the core sample contacts and pushes the rotating disk 9 to move upward. The rotating disk 9 drives the second connecting member 23 to move upward, and the second connecting member 23 moves relative to the first connecting member 22. When the vertical surface of the groove on the second connecting member 23 contacts the vertical surface of the groove on the first connecting member 22, the second connecting member 23 moves relative to the first connecting member 22. The first connecting member 22 drives the second connecting member 23 to rotate clockwise, and the second connecting member 23 drives the rotating disk 9 to rotate clockwise. The rotating disk 9 drives the cam housing 10 to rotate clockwise through the limit plate 41. The cam housing 10 slides along the limit plate 41 under the extrusion of the drill bit 7 and is relatively displaced with the rotating disk 9. At this time, the cam housing 10 rotates eccentrically, and the cam housing 10 squeezes the core sample, causing the core sample to deflect and swing, thereby disconnecting the core sample from the roadbed, ensuring the integrity of the core sample and improving the success rate of sampling.

[0045] During the upward movement of the rotating disk 9, the rotating disk 9 drives the limit plate 41 to move upward, and the limit plate 41 pushes the deflection plate 43 (hereinafter referred to as Fig.10 Taking the middle deflection plate 43 as an example), the deflection plate 43 rotates counterclockwise around the rotating shaft 42 as the center (the second elastic member between the deflection plate 43 and the cam housing 10 is gradually compressed), the deflection plate 43 pushes the first clamping ring 44 to move to the right, the first clamping ring 44 contacts the core sample and clamps the core sample, the first clamping ring 44 stops moving after supporting the core sample, at this time the first clamping ring 44 completes the clamping action on the core sample (the diameter of the core sample is the same as the diameter of the bottom of the inner frustum of the drill bit 7), and the vertical surface of the groove on the second connecting member 23 contacts the vertical surface of the groove on the first connecting member 22.

[0046] During the rotation of the second connecting member 23, when the second connecting member 23 contacts the limiting rod 31, the limiting rod 31 limits the second connecting member 23, and the second connecting member 23 stops rotating. Since the resistance of the second connecting member 23 to the first connecting member 22 is greater than the limiting force of the limiting column 221 on the transmission block 21, the second connecting member 23 limits the first connecting member 22, the transmission block 21 rotates and squeezes out the limiting column 221, the limiting column 221 loses the limiting position on the transmission block 21, the transmission block 21 loses the transmission to the first connecting member 22, the first connecting member 22 and the second connecting member 23 stop rotating together, the rotating disk 9 stops rotating under the action of the second connecting member 23, the rotating disk 9 stops the limiting plate 41 and the cam housing 10 stops rotating, thereby controlling the number of rotations of the core sample and reducing the probability of crack expansion and fracture stratification inside the core sample caused by excessive rotation of the cam housing 10. At this time, the core sample is in the cam housing 10 and contacts the side of the cam housing 10 close to the center of the circle.

[0047] After the cam housing 10 drives the core sample to swing, the user switches the gear of the motor 5 so that the motor 5 slowly drives the drill bit 7 to rotate counterclockwise (at this time, the rotation direction of the drill bit 7 is opposite to the rotation direction of the drill bit 7 during drilling). During the counterclockwise rotation of the drill bit 7, when the limit column 221 is aligned with the upper limit hole of the transmission block 21, the limit column 221 enters the limit hole of the transmission block 21 under the action of the first elastic member thereon, and the transmission block 21 drives the first connecting member 22 to rotate counterclockwise through the limiting action. When the raised inclined surface on the second connecting member 23 contacts the raised inclined surface on the first connecting member 22, the second connecting member 23 cannot move downward under the blocking action of the core sample, and the first connecting member 22 drives the second connecting member 23 to rotate counterclockwise. When the second connecting member 23 rotates counterclockwise (at this time, the rotation direction of the second connecting member 23 is opposite to the rotation direction of the second connecting member 23 during drilling), when the limiting rod 31 contacts the second connecting member 23, the second connecting member 23 completes the reset, and the limiting rod 31 limits the second connecting member 23 again, and the second connecting member 23 limits the first connecting member 22. At this time, the limiting force of the second connecting member 23 on the first connecting member 22 is greater than the limiting force of the limiting column 221 on the transmission block 21, the transmission block 21 rotates and squeezes out the limiting column 221, and the transmission block 21 loses the transmission to the first connecting member 22. At this time, the drill bit 7 drives the transmission block 21 to continue to rotate, and the first connecting member 22 stops rotating under the limiting action of the second connecting member 23.

[0048] After the first connecting member 22 stops rotating under the limiting action of the second connecting member 23, the user rotates the turntable counterclockwise, the turntable drives the driving screw 4 to rotate counterclockwise, the driving screw 4 drives the sliding block 3 to move upward, the sliding block 3 moves upward along the sliding frame 2, the sliding block 3 drives the motor 5, the liquid pump 6 and the drill bit 7 to move upward together, under the gravity of the core sample, the core sample loses the squeezing force on the rotating disk 9, the rotating disk 9 moves downward under the action of gravity, the rotating disk 9 drives the limiting plate 41 and the second connecting member 23 to move downward, the limiting plate 41 loses contact with the deflection plate 43, the deflection plate 43 rotates clockwise under the action of the second elastic member thereon, and the deflection plate 43 pulls the first clamp ring 44 to reset , causing the first clamping ring 44 to lose its clamping effect on the core sample, and the second connecting member 23 loses contact with the first connecting member 22. When the limiting column 221 is aligned with the upper limiting hole of the transmission block 21, the limiting column 221 enters the limiting hole of the transmission block 21 under the action of the first elastic member thereon, and the transmission block 21 continues to drive the first connecting member 22 to rotate counterclockwise through the limiting effect of the limiting column 221, and the drill bit 7 gradually moves upward. After the sliding block 3 is reset and returns to the initial position, the sliding block 3 drives the motor 5, the liquid pump 6 and the drill bit 7 to return to the initial position. The user turns off the motor 5 and the liquid pump 6. At this time, the user takes out the core sample from the drilling port of the drill bit 7 to complete the coring.

[0049] Embodiment 2: Based on embodiment 1, Figure 4 , Figure 11-13 As shown, it also includes: a first clamping plate 51, at least two in number, both of which are slidably connected to the drill bit 7, a third elastic member is fixedly connected between the first clamping plate 51 and the drill bit 7, and a first through hole is arranged on the first clamping plate 51; a second clamping plate 52, at least two in number, slidably connected to the drill bit 7, a fourth elastic member is fixedly connected between the second clamping plate 52 and the drill bit 7, a second through hole is arranged on the second clamping plate 52, a second clamping ring 53 is fixedly connected to the first clamping plate 51, all the second clamping plates 52 are staggered with all the first clamping plates 51, and a magnetic ring 61 is slidably connected to the side of the second clamping ring 53 close to the center of the drill bit 7, and two adjacent magnetic rings 61 are magnetically attracted to each other, and the magnetic ring 61 is used to fix the core sample.

[0050] The above-mentioned method proposes a method for fixing the middle part of the core sample, so that the swinging force acts accurately on the connection between the core sample and the roadbed, reducing the impact on the middle part of the core sample and reducing the probability of the core sample breaking; the third elastic member between the first clamping plate 51 and the drill bit 7 is a tension spring, which is used to drive the first clamping plate 51 to reset; the fourth elastic member between the second clamping plate 52 and the drill bit 7 is a tension spring, which is used to drive the second clamping plate 52 to reset; after the magnetic ring 61 is tightly buckled and spliced ​​into a circle under the action of magnetic force, the magnetic ring 61 squeezes and fixes the core sample, and under the action of the squeezing force of the magnetic ring 61 on the core sample, the second clamping ring 53 can no longer drive the magnetic ring 61 to rotate, and the second clamping ring 53 and the magnetic ring 61 rotate relative to each other; the elastic force of the third elastic member between the first clamping plate 51 and the drill bit 7 is greater than the magnetic force between the magnetic rings 61, which is used to make the third elastic member between the first clamping plate 51 and the drill bit 7 drive the magnetic ring 61 to reset.

[0051] like Figure 4 , Figure 5 , Fig.11 and Fig.13 As shown, it also includes: second circulation tubes 71, which are embedded in the drill bit 7, and the number of which is the same as the sum of the number of the first clamping plates 51 and the second clamping plates 52, and are both rotatably connected and connected to the first circulation tube 8. The drill bit 7 is provided with cavities 72, the number of which is the same as the sum of the number of the first clamping plates 51 and the second clamping plates 52. The first clamping plates 51 and the second clamping plates 52 slide in adjacent cavities 72 respectively, the first through hole on the first clamping plate 51 and the second through hole on the second clamping plate 52 are both connected to the cavity 72, the second circulation tube 71 is connected to the adjacent cavity 72, and a fluid pipeline is provided in the drill bit 7, and the fluid pipeline in the drill bit 7 is connected to the adjacent cavity 72.

[0052] The above-mentioned method proposes a method for cooling the drill bit 7 and the core sample, so that the temperature of the drill bit 7 and the core sample can be cooled more evenly, the service life of the drill bit 7 can be extended, and the influence of internal stratification and crack expansion caused by the high temperature of the core sample can be reduced; the liquid pumped out by the liquid pump 6 enters the first circulation pipe 8 through the liquid pump 6, a part of the liquid in the first circulation pipe 8 enters the drill bit 7 through the third through hole on the rotating disk 9, and the rest enters the second circulation pipe 71, a part of the liquid entering the second circulation pipe 71 flows into the drill bit 7 through the first through hole on the first clamp plate 51 and the second through hole on the second clamp plate 52, and the rest enters the fluid passage in the drill bit 7 and flows out from the bottom of the drill bit 7.

[0053] like Fig.11 and Fig.14 As shown, a circumferentially distributed flow tube 81 is provided at the bottom of the drill bit 7, and the flow tube 81 is connected to the fluid pipeline in the drill bit 7. The flow tube 81 is used to allow the liquid to flow out from the bottom of the drill bit 7. A circumferentially distributed cutting edge is provided at the bottom of the drill bit 7, and a guide groove 91 is provided on the cutting edge. The guide groove 91 gradually deepens along the rotation direction of the drill bit 7, and is used to guide the debris and liquid.

[0054] The above-mentioned method proposes a method for cooling the bottom of the drill bit 7 and guiding the debris, which is used to improve the heat dissipation effect of the bottom of the drill bit 7, reduce the accumulation of debris at the bottom of the drill bit 7, and increase the service life of the drill bit 7; the cutting edge at the bottom of the drill bit 7 is made of wear-resistant steel, which increases the service life of the drill bit 7; the guide groove 91 is located in the middle of the cutting edge, and the depth of the guide groove 91 gradually deepens along the rotation direction of the drill bit 7 during drilling. During the rotation of the drill bit 7, the cut debris and liquid have a larger movement space, reducing the accumulation of debris at the bottom of the drill bit 7, and increasing the residence time of the liquid in the cutting edge at the bottom of the drill bit 7, thereby improving the cooling effect of the liquid on the bottom of the drill bit 7.

[0055] Working principle: during the gradual descent of the drill bit 7, the drill bit 7 drives the first clamping plate 51 and the second clamping plate 52 to rotate, and the first clamping plate 51 drives the second clamping ring 53 to rotate. Before the top of the core sample contacts the rotating disk 9, most of the liquid extracted by the liquid pump 6 enters the drill bit 7 along the first circulation pipe 8, and a small amount of liquid enters the cavity 72 through the second circulation pipe 71 and is discharged into the drill bit 7 from the first through hole on the first clamping plate 51 and the second through hole on the second clamping plate 52. The liquid entering the cavity 72 overcomes the pulling force of the third elastic member between the first clamping plate 51 and the drill bit 7 and pushes the first clamping plate 51 to move in the axial direction of the drill bit 7. The liquid entering the cavity 72 overcomes the pulling force of the fourth elastic member between the second clamping plate 52 and the drill bit 7 and pushes the second clamping plate 52 to move in the axial direction of the drill bit 7. The first clamping plate 51 drives the second clamping ring 53 to move in the axial direction of the drill bit 7. The liquid in the cavity 72 The liquid flows out from the circulation pipe 81 through the fluid passage of the drill bit 7, and the liquid flowing out from the circulation pipe 81 enters between the bottom of the drill bit 7 and the roadbed, and cools the bottom of the drill bit 7 and the roadbed, thereby alleviating the overheating of the drill bit 7 and reducing the influence of the overheating of the drill bit 7 on the sampling work. During the rotation of the drill bit 7, the water between the bottom of the drill bit 7 and the roadbed enters the guide groove 91, thereby increasing the contact area between the liquid flowing out of the circulation pipe 81 and the cutting edge at the bottom of the drill bit 7, and prolonging the residence time of the liquid flowing out of the circulation pipe 81 at the bottom of the drill bit 7, thereby making the liquid flowing out of the circulation pipe 81 act more evenly on the bottom of the drill bit 7, thereby improving the heat dissipation and chip removal effect of the liquid flowing out of the circulation pipe 81 on the bottom of the drill bit 7, and extending the service life of the drill bit 7 by uniformly cooling the drill bit 7 and the drilled core sample, reducing the generation of microcracks inside the core sample due to thermal stress, and reducing the influence on the layered structure of the core sample.

[0056] When the top of the core sample contacts the rotating disk 9 and is squeezed, the core sample moves upward and blocks the connection between the first circulation tube 8 and the inside of the drill bit 7. The liquid circulating in the first circulation tube 8 all flows along the second circulation tube 71 to the cavity 72. At this time, the liquid pressure in the cavity 72 increases, and the liquid in the cavity 72 further pushes the second clamping plate 52 to move in the axial direction of the drill bit 7, so that the second clamping plate 52 contacts the core sample and supports the middle part of the core sample. The liquid in the cavity 72 further pushes the first clamping plate 51 to move in the axial direction of the drill bit 7, and the first clamping plate 51 drives the second clamping ring 53 to move in the axial direction of the drill bit 7, and makes all the second clamping rings 53 contact, thereby All the magnetic rings 61 are in contact with each other. After all the magnetic rings 61 are tightly buckled into a ring under the action of magnetic force, the core sample is squeezed to apply a fixing force, and the core sample is contacted to form a whole. The ring formed by the tightly buckled magnetic rings 61 rotates relative to the second clamping ring 53, so that the magnetic rings 61 are not affected by the rotation of the drill bit 7 and the middle part of the core sample is squeezed and fixed. When the cam housing 10 drives the core sample to swing, the probability of core sample breakage is reduced and the integrity of the core sample is improved. As the liquid pressure in the cavity 72 increases, the liquid flowing out of the circulation pipe 81 also further increases the impact force, and under the guidance of the guide groove 91, the cooling and chip removal effects on the bottom of the drill bit 7 are further improved.

[0057] After the drill bit 7 reaches the deepest point, the user switches the gear of the motor 5 and rotates the driving screw 4 counterclockwise. The driving screw 4 drives the motor 5, the liquid pump 6 and the drill bit 7 to reset through the sliding block 3. Under the joint action of the magnetic ring 61 and the first clamping ring 44, the drill bit 7 moves upward and drives the core sample to move upward. When the drill bit 7 returns to its initial position, the reset is completed. The user turns off the motor 5 and the liquid pump 6 and puts one hand under the drill bit 7. The liquid pump 6 stops extracting liquid. The first clamping plate 51 is reset under the action of the third elastic member between the first clamping plate 51 and the drill bit 7, and the second clamping plate 52 is reset under the action of the fourth elastic member between the second clamping plate 52 and the drill bit 7. Under the action of the first clamping plate 51, the circular ring formed by the magnetic ring 61 loses its fixing force on the core sample, and the core sample falls downward under the action of gravity. At this time, the user's hand placed under the drill bit 7 catches the core sample and takes the core sample out of the drill bit 7, thereby completing the coring action, and then repeats the above process again to complete the subsequent sampling work.

[0058] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A road surface thickness detection and coring device for highway engineering, characterized in that: Included are: A support frame (1), the support frame (1) is fixedly connected to a sliding frame (2), the sliding frame (2) is slidably connected to a sliding block (3), the sliding frame (2) is rotatably connected to a driving screw (4), the driving screw (4) is threadedly connected to the sliding block (3), the sliding block (3) is fixedly connected to a motor (5) and a liquid pump (6), the sliding block (3) is rotatably connected to a drill bit (7), the sliding block (3) is provided with a liquid tank, the liquid tank on the sliding block (3) is connected to the liquid pump (6) ), the output shaft of the motor (5) is connected to the drill bit (7) through a pulley belt transmission, the liquid pump (6) is fixedly connected to and connected with a first flow pipe (8), the first flow pipe (8) is rotatably connected and connected with the drill bit (7), the first flow pipe (8) is rotatably and slidably connected with a rotating disk (9), the rotating disk (9) is slidably connected with a cam housing (10), the cam housing (10) is in extrusion contact with the drill bit (7), and the cam housing (10) is used to drive the core sample to rotate; A driving assembly is arranged in the drill bit (7) and is used to drive the rotating disk (9) to rotate.

2. A road surface thickness detection and coring device for highway engineering according to claim 1, characterized in that: The drive assembly comprises: A transmission block (21) is fixedly connected to the drill bit (7); a first connecting member (22) is rotatably connected to the transmission block (21); a limiting column (221) is slidably connected to the first connecting member (22); a first elastic member is fixedly connected between the limiting column (221) and the first connecting member (22); a limiting hole is provided on the transmission block (21); the limiting column (221) is used to limit the transmission block (21); a second connecting member (23) is fixedly connected to the rotating disk (9); the first connecting member (22) is in extrusion contact with the second connecting member (23).

3. A road surface thickness detection and coring device for highway engineering according to claim 2, characterized in that: Both sides of the limiting column (221) are provided with inclined surfaces.

4. A road surface thickness detection and coring device for highway engineering according to claim 2, characterized in that: A limiting rod (31) is fixedly connected to the first flow pipe (8), and the limiting rod (31) is used to limit the position of the second connecting member (23).

5. A road surface thickness detection and coring device for highway engineering according to claim 2, characterized in that: Also included are: A limit plate (41) is fixedly connected to the rotating disk (9), and both sides of the limit plate (41) are provided with inclined surfaces; There are several rotating shafts (42), all of which are rotatably connected to the cam housing (10); the rotating shaft (42) is rotatably connected to a deflection plate (43); a second elastic member is fixedly connected between the deflection plate (43) and the cam housing (10); a first clamping ring (44) is fixedly connected to the side of the deflection plate (43) away from the limiting plate (41); the first clamping ring (44) is used to clamp the core sample; a slope is provided on the side of the deflection plate (43) away from the first clamping ring (44); and all the deflection plates (43) are in extrusion contact with the limiting plate (41).

6. A road surface thickness detection and coring device for highway engineering according to claim 1, characterized in that: Also included are: at least two first clamping plates (51), each of which is slidably connected to the drill bit (7), a third elastic member is fixedly connected between the first clamping plate (51) and the drill bit (7), and a first through hole is provided on the first clamping plate (51); The second clamping plates (52), at least two in number, are slidably connected to the drill bit (7); a fourth elastic member is fixedly connected between the second clamping plates (52) and the drill bit (7); a second through hole is provided on the second clamping plates (52); a second clamping ring (53) is fixedly connected to the first clamping plates (51); and all the second clamping plates (52) and all the first clamping plates (51) are arranged in a staggered manner.

7. A road surface thickness detection and coring device for highway engineering according to claim 6, characterized in that: A magnetic ring (61) is slidably connected to one side of the second clamping ring (53) close to the center of the drill bit (7), and two adjacent magnetic rings (61) are magnetically attracted to each other. The magnetic rings (61) are used to fix the core sample.

8. A road surface thickness detection and coring device for highway engineering according to claim 6, characterized in that: Also included are: The number of the second circulation tubes (71) is the same as the sum of the number of the first clamping plates (51) and the second clamping plates (52), and they are all rotatably connected and connected to the first circulation tube (8), and are embedded in the drill bit (7). The drill bit (7) is provided with cavities (72) whose number is the same as the sum of the number of the first clamping plates (51) and the second clamping plates (52). The first clamping plates (51) and the second clamping plates (52) slide in adjacent cavities (72) respectively. The first through hole on the first clamping plate (51) and the second through hole on the second clamping plate (52) are both connected to adjacent cavities (72). The second circulation tube (71) is connected to the adjacent cavity (72). The drill bit (7) is provided with a fluid pipeline, and the fluid pipeline in the drill bit (7) is connected to the adjacent cavity (72).

9. A road surface thickness detection and coring device for highway engineering according to claim 8, characterized in that: The bottom of the drill bit (7) is provided with circumferentially distributed flow tubes (81), the flow tubes (81) are connected to the fluid pipeline in the drill bit (7), and the flow tubes (81) are used to allow liquid to flow out from the bottom of the drill bit (7).

10. A road surface thickness detection and coring device for highway engineering according to claim 8, characterized in that: The bottom of the drill bit (7) is provided with circumferentially distributed cutting edges, and the cutting edges are provided with guide grooves (91). The guide grooves (91) gradually become deeper along the rotation direction of the drill bit (7) for drilling, and are used to guide debris and liquid.

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