A road construction drilling sampling device

Abstract

The present invention relates to the field of sampling, and specifically to a road construction drilling sampling device. The device comprises a vehicle frame and a sampling assembly arranged on the vehicle frame, wherein the sampling assembly comprises a drill tube and an inner tube, wherein a plurality of drill bits are hinged at the lower end of the drill tube, and the inner tube is coaxially inserted into the inside of the drill tube, and the inner tube is a grid structure, and the inner tube comprises a first cylinder body and a second cylinder body, and a film is arranged inside the inner tube. When drilling the road surface part, the drill bit is in a horizontal state, and the contact area between the drill bit and the road surface is large, so that a large cutting support force can be maintained to prevent the drill tube from being deformed by force; when drilling the roadbed part, the drill bit is in an upright state, and the contact area between the drill bit and the roadbed is small, so that the cutting speed is accelerated and the cutting efficiency is improved, so as to adapt to different drilling requirements and improve the sample quality; at the same time, when cutting the roadbed part, the inner tube is inserted into the roadbed in advance to support the roadbed; after the drilling is completed, the film is pulled open to wrap the sample core, so as to ensure that the distribution state of each layer structure of the sample core is accurate and the authenticity of the sample is ensured.

Description

Technical Field

[0001] The invention relates to the field of sampling, and in particular to a road construction drilling sampling device. Background Art

[0002] Sampling refers to the process of extracting individuals or samples from a population, that is, the process of testing or observing the population. In the process of road construction, it is usually necessary to sample the constructed roads and conduct physical analysis on the samples to determine the porosity, water absorption, compressive strength, frost resistance, wear resistance, etc. of the samples to determine whether the roads meet the standards.

[0003] Since the road structure consists of pavement and roadbed, the existing core sampling machine will have different friction forces on different structures due to the different hardness of the pavement and roadbed materials, which can easily cause the drill tube to deform. At the same time, the samples of the roadbed part are easily deformed and displaced by the friction of the drill tube due to their low hardness, resulting in inaccurate distribution of the structure of each layer of the sample core and loss of authenticity. In addition, water needs to be injected to dissipate heat for the drill tool during drilling, but the added cooling water will easily enter the sample core, affecting the sample quality. When taking out the core sample, the bottom material is relatively loose, which can easily cause sample omission.

[0004] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] According to the deficiencies of the prior art, the present invention proposes a road construction drilling sampling device to solve the problem of low sample quality of the prior sampling device.

[0006] A road construction drilling sampling device of the present invention adopts the following technical scheme: it comprises a vehicle frame and a sampling assembly, the vehicle frame is provided with a lifting mechanism and a rotating mechanism, and the sampling assembly comprises a drill tube and an inner tube;

[0007] The drill tube can be lifted and lowered by the lifting mechanism and can be rotated by the rotating mechanism. The lower end of the drill tube is open, and a plurality of drill bits are evenly hinged on the lower end surface along the circumferential direction. The drill bits have a horizontal state and an upright state. The bottom area of ​​the drill bits in the horizontal state is greater than the bottom area of ​​the drill bits in the upright state. A first torsion spring is arranged between the drill bits and the drill tube, and the drill bits are initially in a horizontal state.

[0008] The inner cylinder is coaxially inserted into the drill barrel, the inner cylinder is a grid structure, and the peripheral wall has multiple grid rods evenly distributed around the circumference; the inner cylinder has a first working state and a second working state; when the inner cylinder is in the first working state, the drill bit is in a horizontal state, the inner cylinder is flush with the bottom of the drill barrel and is located above the drill bit, the inner cylinder rotates synchronously with the drill barrel and moves up and down, and the device drills the road surface; when the inner cylinder is in the second working state, the lower end of the inner cylinder extends out of the drill barrel, at this time the drill bit rotates to an upright state under the top push of the inner cylinder, the inner cylinder moves up and down with the drill barrel and stops rotating, and the device drills the roadbed.

[0009] Optionally, the inner cylinder includes a first cylinder body and a second cylinder body; the first cylinder body includes a first disk body and a plurality of first push rods, and the first push rods are evenly distributed along the circumference of the first disk body; the second cylinder body includes a second disk body and a plurality of second push rods, and the second push rods are evenly distributed along the circumference of the second disk body;

[0010] The first cylinder and the second cylinder are both inserted into the drill tube, and the first push rod and the second push rod are on the same circumference; a rotating column is arranged inside one of the first push rod and the second push rod, and the rotating column can rotate, and a second torsion spring is arranged between the rotating column and the first push rod or the second push rod, and a film is wound on the rotating column, and the other end of the film is connected to the other of the first push rod and the second push rod;

[0011] A transmission structure is connected between the first cylinder and the second cylinder, and the transmission structure is configured to drive the first cylinder and the second cylinder to rotate relative to each other, thereby making the first push rod and the second push rod approach or move away from each other. Initially, the first push rod and the second push rod are in contact, and the film is in a rolled-up state.

[0012] Optionally, the transmission structure includes a control motor, a transmission gear and a transmission ring gear, the control motor is arranged on the first disk body, and the transmission gear is connected to the output shaft of the control motor; the transmission ring gear is arranged on the second disk body, and the transmission ring gear is meshed with the transmission gear.

[0013] Optionally, the inner circumferential walls of the first push rod and the second push rod are both provided with supporting protrusions, and when the first push rod and the second push rod are in contact, the supporting protrusions of the two push rods are assembled into a hemispherical shape.

[0014] Optionally, the inner cylinder is provided with jet holes and water spray ports, the water spray ports are located at the bottom of the inner cylinder and are evenly distributed along the circumference, the jet holes are located on the inner side wall of the inner cylinder and are evenly distributed along the circumference and axial direction of the inner cylinder, and the inner cylinder is provided with an air supply channel and a water supply channel, the air supply channel is used to supply air to the jet holes, and the water supply channel is used to supply water to the water spray ports.

[0015] Optionally, a hinge column is provided at the bottom of the drill barrel, and the drill bit is rotatably provided on the hinge column. A limit pin is provided on the hinge column, and the limit pin can slide radially along the hinge column. A limit groove is provided inside the drill bit. When the drill bit is in a vertical state, the limit pin and the limit groove are aligned and the limit pin is extended and inserted into the limit groove. A control airway is provided on the drill barrel and the hinge shaft, and the control airway is connected to the limit pin. The extension and retraction of the limit pin are controlled by sucking air into the control airway.

[0016] Optionally, the lifting mechanism includes a slide, a screw and a handwheel; two guide slides are provided on the frame, the slide can be slid up and down on the guide slides, the screw is vertically arranged on the frame and can rotate, the screw is inserted into the slide, and the screw is spirally connected to the slide; the handwheel is arranged at the top of the screw to drive the screw to rotate; the drill barrel is connected to the slide and rises and falls with the slide.

[0017] Optionally, the rotating mechanism includes a main motor, a rotating wheel and a transmission belt. The main motor is arranged on a slide. A transmission wheel is arranged at the output end of the main motor. The rotating wheel is rotatably arranged on the slide and sleeved on the top of the drill barrel. The rotating wheel can drive the drill barrel to rotate. The transmission belt is sleeved on the outside of the transmission wheel and the rotating wheel.

[0018] Optionally, a support spring is provided between the rotating wheel and the drill tube, the support spring extends vertically, and a pressure sensing device is installed at a fixing portion between the support spring and the rotating wheel.

[0019] Optionally, a first column is disposed at the upper end of the first cylinder, the first column is connected to the output end of the active cylinder, and a second body is disposed at the upper end of the second cylinder, the second column is rotatably inserted into the first column;

[0020] A connecting groove is arranged at the top of the first cylinder, and a connecting boss is arranged at the inner top of the drill tube. Both the connecting boss and the connecting groove are polygonal. When the connecting boss is inserted into the connecting groove, the drill tube can drive the first cylinder to rotate.

[0021] The beneficial effects of the present invention are as follows: a road construction drilling sampling device of the present invention is provided with a drill bit with changeable posture according to the hardness of the road surface and roadbed materials. When drilling the road surface part, the drill bit is in a horizontal state, and the contact area between the drill bit and the road surface is large, which can maintain a large cutting support force and prevent the drill tube from being deformed by force; when drilling the roadbed part, the drill bit is in an upright state, and the contact area between the drill bit and the roadbed is small. Because the roadbed is a relatively soft soil layer structure, the cutting resistance is small. At this time, the contact area between the drill bit and the roadbed is reduced, the cutting speed is accelerated, and the cutting efficiency is improved, so as to adapt to different drilling needs and improve the sample quality. At the same time, when cutting the roadbed part, the inner tube is inserted into the roadbed in advance, and the inner tube plays a supporting role on the roadbed part, preventing the sample of the roadbed part from being deformed and displaced due to the friction of the drill tube, ensuring the distribution state of each layer structure of the sample core is accurate, and ensuring the authenticity of the sample.

[0022] Furthermore, the inner cylinder is configured to include a first cylinder body and a second cylinder body, the first cylinder body and the second cylinder body can rotate relative to each other, a rotating column is arranged inside one of the first push rod and the second push rod, a film is wrapped around the rotating column, and the other end of the film is connected to the other of the first push rod and the second push rod, and after drilling is completed and before the drill tube is pulled up, the sample is wrapped by the film, and when the drill tube is pulled up and the sample is taken out, the sample of the roadbed part will not fall off, and the samples of the roadbed part and the pavement part are taken out in a state of overall consistency, thereby ensuring the integrity of the sample.

[0023] Furthermore, a water spray port and an air jet hole are arranged on the inner cylinder, and when cutting the road surface portion, water and air are injected at the same time to prevent moisture from entering the sample core. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of a road construction drilling sampling device of the present invention;

[0026] Figure 2 It is an exploded schematic diagram of the sampling assembly in the present invention;

[0027] Figure 3 It is a front view of the sampling assembly of the present invention;

[0028] Figure 4 for Figure 3 Middle AA section view;

[0029] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0030] Figure 6 for Figure 5 Schematic diagram of another state (film is pulled open);

[0031] Figure 7 A bottom view of the sampling assembly of the present invention;

[0032] Figure 8 for Figure 7 Middle BB section view;

[0033] Fig. 9 for Figure 8 Enlarged view of point C in the middle;

[0034] Fig.10 for Fig. 9 Schematic diagram of another state (drill bit upright state);

[0035] Fig.11 It is a structural schematic diagram of the drill tube in the present invention;

[0036] Fig.12 for Fig.11 Enlarged view of point D in the middle.

[0037] In the figure:

[0038] 100, frame; 101, hand wheel; 102, slide; 103, lead screw; 104, rotating wheel; 105, transmission belt; 106, main motor; 108, guide slide bar;

[0039] 200, sampling assembly;

[0040] 201, drill tube; 2011, support spring; 2012, control air hole; 2014, active cylinder; 2015, drill bit; 2016, control air cavity; 2017, hinged column; 2018, limit pin; 2019, push air cavity;

[0041] 202, first cylinder; 2021, control motor; 2022, first push rod; 2023, connecting groove; 2024, arc waist groove; 2025, water spraying port; 2026, water passing cavity; 2027, liquid channel; 2028, film;

[0042] 203, second cylinder; 2031, transmission gear ring; 2032, connecting column; 2033, second push rod; 2034, jet hole; 2036, air cavity; 2037, airway. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0044] like Figures 1 to 12 As shown, a road construction drilling sampling device provided by an embodiment of the present invention includes a frame 100 and a sampling assembly 200. The frame 100 is provided with a lifting mechanism and a rotating mechanism. The bottom of the frame 100 is provided with running wheels to facilitate pushing the frame 100 to move.

[0045] The sampling assembly 200 is disposed on the vehicle frame 100 , and the sampling assembly 200 includes a drill tube 201 and an inner tube.

[0046] The drill barrel 201 can be lifted and lowered by the lifting mechanism and can be rotated by the rotating mechanism. The lower end of the drill barrel 201 is open, and a plurality of drill bits 2015 are evenly hinged on the lower end surface along the circumferential direction. The drill bits 2015 have a horizontal state and an upright state. The bottom area of ​​the drill bit 2015 when it is in the horizontal state is greater than the bottom area of ​​the drill bit 2015 when it is in the upright state. A first torsion spring is provided between the drill bit 2015 and the drill barrel 201, and the drill bit 2015 is initially in a horizontal state.

[0047] The inner cylinder is coaxially inserted into the drill barrel 201, and the inner cylinder is a grid structure, and the peripheral wall has a plurality of grid rods uniformly distributed around the circumference; the inner cylinder has a first working state and a second working state; when the inner cylinder is in the first working state, the drill bit 2015 is in a horizontal state, the inner cylinder is flush with the bottom of the drill barrel 201 and is located above the drill bit 2015, the inner cylinder rotates synchronously with the drill barrel 201 and moves up and down, and the device drills the road surface; when the inner cylinder is in the second working state, the lower end of the inner cylinder extends out of the drill barrel 201, and at this time the drill bit 2015 rotates to an upright state under the push of the inner cylinder, the inner cylinder moves up and down with the drill barrel 201 and stops rotating, and the device drills the roadbed.

[0048] According to the different hardness of the road surface and roadbed materials, the present invention sets a drill 2015 with a changeable posture. When drilling the road surface part, the contact area between the drill 2015 and the road surface is large, which can maintain a large cutting support force and prevent the drill tube 201 from being deformed by force; when drilling the roadbed part, the contact area between the drill 2015 and the roadbed is small. Because the roadbed is a soft soil layer structure, the cutting resistance is small. At this time, the contact area between the drill 2015 and the roadbed is reduced, the cutting speed is accelerated, and the cutting efficiency is improved, so as to adapt to different drilling needs. At the same time, when cutting the roadbed part, the inner tube is inserted into the roadbed in advance, and the inner tube plays a supporting role on the roadbed part, preventing the sample of the roadbed part from being deformed and displaced due to the friction of the drill tube 201, ensuring the distribution state of each layer structure of the sample core is accurate, and ensuring the authenticity of the sample.

[0049] In a further embodiment, the inner cylinder includes a first cylinder body 202 and a second cylinder body 203, the first cylinder body 202 includes a first disk body and a plurality of first push rods 2022, the first push rods 2022 are evenly distributed along the circumference of the first disk body, the second cylinder body 203 includes a second disk body and a plurality of second push rods 2033, the second push rods 2033 are evenly distributed along the circumference of the second disk body, the first cylinder body 202 and the second cylinder body 203 are both inserted into the drill barrel 201, and the first disk body is located above the second disk body, and the first push rods 2022 and the second push rods 2033 are on the same circumference.

[0050] A rotating column is arranged inside one of the first push rod 2022 and the second push rod 2033, and the rotating column can rotate. A second torsion spring is arranged between the rotating column and the first push rod 2022 or the second push rod 2033, and a film 2028 is wrapped around the rotating column. The other end of the film 2028 is connected to the other one of the first push rod 2022 and the second push rod 2033.

[0051] A transmission structure is connected between the first cylinder 202 and the second cylinder 203, and the transmission structure is configured to drive the first cylinder 202 and the second cylinder 203 to rotate relative to each other, thereby making the first push rod 2022 and the second push rod 2033 approach or move away. Initially, the first push rod 2022 and the second push rod 2033 are in contact, and the film 2028 is in a rolled-up state. After the drilling of the drill tube 201 is completed, the first push rod 2022 and the second push rod 2033 are moved away from each other, and the film 2028 is pulled open and wrapped to the outside of the sample core. Before the drill tube 201 is pulled up after drilling is completed, the sample is wrapped by the film 2028. When the drill tube 201 is pulled up and the sample is taken out, the sample of the roadbed part will not fall off, and the samples of the roadbed part and the pavement part are taken out in a state of overall consistency to ensure the integrity of the sample.

[0052] In a further embodiment, the transmission structure includes a control motor 2021, a transmission gear and a transmission ring gear 2031. The control motor 2021 is disposed on the first disk of the first cylinder 202. The transmission gear is connected to the output shaft of the control motor 2021. The transmission ring gear 2031 is disposed on the second disk of the second cylinder 203. The transmission ring gear 2031 is meshed with the transmission gear. Specifically, a plurality of arcuate waist grooves 2024 are disposed on the first disk of the first cylinder 202. The arcuate waist grooves 2024 are penetrated from top to bottom and are evenly distributed along the circumference of the first disk. A plurality of connecting columns 2032 are disposed on the second disk of the second cylinder 203. The connecting columns 2032 are slidably inserted into the arcuate waist grooves 2024. The transmission ring gear 2031 is disposed on the top of the connecting columns 2032. Figure 5 and Figure 6 In a preferred embodiment of the present invention, the rotating column is arranged on the first push rod 2022, and the other end of the film 2028 is connected to the second push rod 2033. When the control motor 2021 is activated, the second cylinder 203 is driven to rotate relative to the first cylinder 202 through the transmission gear and the transmission ring gear 2031, and the second push rod 2033 moves away from the first push rod 2022 to pull the film 2028 open.

[0053] In a further embodiment, the inner circumferential walls of the first push rod 2022 and the second push rod 2033 are both provided with supporting protrusions. When the first push rod 2022 and the second push rod 2033 are in contact, the supporting protrusions of the two are assembled into a hemispherical shape. Through the arrangement of the supporting protrusions, during drilling, the first push rod 2022 and the second push rod 2033 can not only support the sample core, but also reduce the friction between the sample core and the inner wall of the drill barrel 201 (the spherical contact between the supporting protrusion and the sample core is line contact), thereby improving the quality of the sample core.

[0054] In a further embodiment, the inner cylinder is provided with an air jet hole 2034 and a water jet port 2025, the water jet port 2025 is located at the bottom of the inner cylinder and is evenly distributed along the circumference, the air jet hole 2034 is located on the inner side wall of the inner cylinder, and is evenly distributed along the circumference and axial direction of the inner cylinder, and an air supply channel and a water supply channel are provided on the inner cylinder, the air supply channel is used to supply air to the air jet hole 2034, and the water supply channel is used to supply water to the water jet port 2025.

[0055] It can be understood that during the process of drilling the road surface, because the road surface is made of materials such as concrete and has high hardness, the friction resistance during drilling is large and a lot of heat is generated. Therefore, it is necessary to lubricate and cool the drilled area through the water nozzle 2025. At this time, the jet can be sprayed into the inner tube through the jet hole 2034 at the same time to form a gas protection around the sample core to prevent sewage from entering the drill tube 201 and contaminating the sample core. When drilling to the roadbed, because the roadbed is a softer soil layer structure, the water spraying can be stopped to avoid damage to the sample core.

[0056] Specifically in the embodiment where the inner cylinder includes the first cylinder body 202 and the second cylinder body 203 , the air jet hole 2034 can be arranged on one of the first push rod 2022 and the second push rod 2033 , and the water jet port 2025 can be arranged on the other one. In a preferred embodiment of the present invention, a water spray port 2025 is provided at the bottom of the first push rod 2022, a water passage cavity 2026 connected to the water spray port 2025 is provided inside the first push rod 2022, a liquid channel 2027 connected to the water chamber 2026 is provided inside the first disk body, and the water passage cavity 2026 and the liquid channel 2027 constitute the above-mentioned water supply channel for supplying water to the water spray port 2025; an air jet hole 2034 is provided on the inner side wall of the second push rod 2033, and each of the air jet holes 2034 on the second push rod 2033 has a plurality of air jet holes 2034 and are evenly distributed along the extension direction of the second push rod 2033, an air passage cavity 2036 connected to the air jet hole 2034 is provided inside the second push rod 2033, an air passage cavity 2036 connected to the air jet hole 2034 is provided inside the second disk body, and an air channel 2037 connected to the air chamber 2036 is provided inside the second disk body, and the air passage cavity 2036 and the air channel 2037 constitute the above-mentioned air supply channel for supplying air to the air jet hole 2034.

[0057] In a further embodiment, a hinge column 2017 is provided at the bottom of the drill barrel 201, and the drill bit 2015 is rotatably provided on the hinge column 2017. A limit pin 2018 is provided on the hinge column 2017, and the limit pin 2018 can slide radially along the hinge column 2017. A limit groove is provided inside the drill bit 2015. When the drill bit 2015 is in a vertical state, the limit pin 2018 and the limit groove are aligned and the limit pin 2018 extends out and inserts into the limit groove; a control airway 2037 is provided on the drill barrel 201 and the hinge shaft, and the control airway 2037 is connected to the limit pin 2018, and the extension and retraction of the limit pin 2018 are controlled by sucking air into the control airway 2037. Specifically, a push air cavity 2019 is provided on the hinge shaft, and the push air cavity 2019 is connected to the limit pin 2018. A control air cavity 2016 is provided inside the drill tube 201, and the control air cavity 2016 is connected to the push air cavity 2019. The control air cavity 2016 and the push air cavity 2019 constitute the above-mentioned control air passage 2037. A control air hole 2012 is provided on the top of the drill tube 201, and the control air hole 2012 is connected to the control air cavity 2016. The control air hole 2012 is externally connected to an inflation mechanism, and the inflation mechanism is used to inflate and deflate air to the control air passage 2037. Further, an elastic member is provided between the limit pin 2018 and the push air cavity 2019, and the elastic member is preferably a spring. The elastic member makes the limit pin 2018 have a tendency to retract into the push air cavity 2019, and the provision of the elastic member makes the reset of the limit pin 2018 faster.

[0058] By setting the limit pin 2018, the drill 2015 can be locked after the drill 2015 is rotated from the horizontal state to the vertical state, so as to prevent the drill 2015 from being squeezed against the outer wall of the inner cylinder (the outer side of the first push rod 2022 and the second push rod 2033) under the resetting action of the first torsion spring, thereby affecting the service life of the drill 2015 and the first push rod 2022 and the second push rod 2033.

[0059] In a further embodiment, the lifting mechanism includes a slide 102, a screw 103 and a handwheel 101. Two guide slides 108 are arranged on the frame 100. The slide 102 can be slid up and down on the guide slides 108. The screw 103 is vertically arranged on the frame 100 and can rotate. The screw 103 is inserted into the slide 102, and the screw 103 is spirally connected to the slide 102; the handwheel 101 is arranged at the top of the screw 103 to drive the screw 103 to rotate; the drill barrel 201 is connected to the slide 102 and rises and falls with the slide 102.

[0060] In a further embodiment, the rotating mechanism includes a main motor 106, a rotating wheel 104 and a transmission belt 105. The main motor 106 is arranged on the slide 102. A transmission wheel is arranged at the output end of the main motor 106. The rotating wheel 104 is rotatably arranged on the slide 102 and is sleeved on the top of the drill barrel 201. The rotating wheel 104 is key-connected to the drill barrel 201 and can drive the drill barrel 201 to rotate. The transmission belt 105 is sleeved on the outside of the transmission wheel and the rotating wheel 104 to transmit power.

[0061] Furthermore, a support spring 2011 is provided between the rotating wheel 104 and the drill barrel 201. Preferably, the support spring 2011 is a compression spring. The support spring 2011 extends vertically. A pressure sensor is installed at the fixed position between the support spring 2011 and the rotating wheel 104 to sense the pressure change of the support spring 2011, and then determine whether the drill barrel 201 has drilled to the roadbed position.

[0062] Furthermore, in order to realize the connection between the inner tube and the drill tube 201, an active cylinder 2014 is arranged on the top of the drill tube 201, and a first column is arranged on the upper end of the first cylinder body 202, and the first column body is connected to the output end of the active cylinder 2014. Under the action of the active cylinder 2014, the first cylinder body 202 can move synchronously with the drill tube 201, and its position relative to the drill tube 201 can be adjusted.

[0063] A second main body is disposed at the upper end of the second cylinder 203 , and the second cylinder is rotatably inserted into the first cylinder, so that it can move synchronously with the first cylinder 202 and can rotate relative to the first cylinder 202 driven by the transmission mechanism.

[0064] Furthermore, in order to realize that the drill barrel 201 drives the barrel body to rotate, a connecting groove 2023 is provided at the top of the first barrel body 202 around the first column, and a connecting boss is provided at the inner top of the drill barrel 201. The connecting boss and the connecting groove 2023 are both polygonal. When the connecting boss is inserted into the connecting groove 2023, the drill barrel 201 can drive the first barrel body 202 to rotate, and then drive the second barrel body 203 to rotate. When the first barrel body 202 moves relative to the drill barrel 201 under the ceiling of the active cylinder 2014 until the connecting boss is disengaged from the connecting groove 2023, the drill barrel 201 rotates relative to the barrel and drives the barrel to move synchronously through the active cylinder 2014.

[0065] In combination with the above embodiments, the use principle and working process of the present invention are as follows:

[0066] Move the vehicle frame 100 to the designated position, turn the hand wheel 101 to bring the drill barrel 201 close to the ground, start the main motor 106, and the main motor 106 drives the drill barrel 201 to rotate. Initially, the connecting boss at the bottom of the drill barrel 201 is inserted into the connecting groove 2023 of the first cylinder 202. Therefore, the drill barrel 201 drives the first cylinder 202 and the second cylinder 203 to rotate synchronously. Continuously turn the hand wheel 101, and the drill barrel 201 drives the first cylinder 202 and the second cylinder 203 to feed downward to sample the road.

[0067] During sampling, the initial drill bit 2015 is in a horizontal state, referring to Fig. 9 The bottom area of ​​the drill bit 2015 is relatively large, and the drill bit 2015 can drill a large area of ​​the road surface, which can maintain a large cutting support force and prevent the drill tube 201 from being deformed by force due to excessive cutting resistance of the drill bit 2015; at the same time, water is injected into the water cavity through the liquid channel 2027, and the water in the water cavity is sprayed out from the water nozzle 2025 to lubricate and cool the cutting part, and the air cavity is ventilated through the air channel 2037, and the gas in the air cavity is sprayed out from the air jet hole 2034 to form a gas protection around the sample core to prevent moisture from entering the sample core.

[0068] When the drill 2015 cuts the roadbed, because the roadbed is a soft soil structure, the pressure sensor senses that the cutting resistance of the drill 2015 is small, and the active cylinder 2014 is started. The active cylinder 2014 drives the first cylinder 202 and the second cylinder 203 to move downward by a set distance, and the first push rod 2022 and the second push rod 2033 push the inner end of the drill 2015 to rotate, and the drill 2015 is in an upright state. Fig.10 At this time, the control air cavity 2016 is inflated through the control air hole 2012, and the gas in the control air cavity 2016 enters the push air cavity 2019 to push out the limit pin 2018, and the limit pin 2018 is inserted into the limit groove inside the drill 2015 to lock the position of the drill 2015. In the process of pushing the drill 2015, the first push rod 2022 and the second push rod 2033 extend the lower end of the drill tube 201 and insert it into the roadbed in advance, which plays a supporting role for the roadbed. After the drill 2015 changes its posture, the contact area between the bottom and the ground is reduced. When cutting the roadbed part, the cutting speed can be accelerated and the cutting efficiency can be improved. At the same time, because the roadbed is relatively soft, water injection into the liquid channel 2027 can be stopped, and the inflation into the air channel 2037 can be stopped. The drill 2015 continues to drill in a small area posture until the drilling is completed.

[0069] After drilling is completed, the control motor 2021 is started. The control motor 2021 drives the second cylinder 203 to rotate relative to the first cylinder 202 through the transmission gear and the transmission ring gear 2031. The film 2028 is pulled open and wrapped to the outside of the sample core, and the drill barrel 201 is pulled upward to separate the drill barrel 201 from the ground. During the process of the drill barrel 201 separating from the ground, the sample core of the roadbed part will not fall off due to the wrapping effect of the film 2028, ensuring that the sample core can be completely lifted to the ground with the drill barrel 201. Then, the first cylinder 202 and the second cylinder 203 are pushed downward by the active cylinder 2014, so that the sample core is separated from the drill barrel 201, and the sample core is taken out to complete the sampling.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A road construction drilling sampling device, characterized in that: It includes a vehicle frame and a sampling assembly, wherein the vehicle frame is provided with a lifting mechanism and a rotating mechanism, and the sampling assembly includes a drill tube and an inner tube; The drill tube can be lifted and lowered by the lifting mechanism and can be rotated by the rotating mechanism. The lower end of the drill tube is open, and a plurality of drill bits are evenly hinged on the lower end surface along the circumferential direction. The drill bits have a horizontal state and an upright state. The bottom area of ​​the drill bits in the horizontal state is greater than the bottom area of ​​the drill bits in the upright state. A first torsion spring is arranged between the drill bits and the drill tube, and the drill bits are initially in a horizontal state. The inner cylinder is coaxially inserted into the drill tube, and the inner cylinder is a grid structure, and the peripheral wall has a plurality of grid rods uniformly distributed around the circumference; the inner cylinder has a first working state and a second working state; when the inner cylinder is in the first working state, the drill bit is in a horizontal state, the inner cylinder is flush with the bottom of the drill tube and is located above the drill bit, the inner cylinder rotates synchronously with the drill tube and moves up and down, and the device drills the road surface; when the inner cylinder is in the second working state, the lower end of the inner cylinder extends out of the drill tube, and at this time the drill bit rotates to an upright state under the top push of the inner cylinder, the inner cylinder moves up and down with the drill tube and stops rotating, and the device drills the roadbed; The inner cylinder includes a first cylinder body and a second cylinder body; the first cylinder body includes a first disk body and a plurality of first push rods, and the first push rods are evenly distributed along the circumference of the first disk body; the second cylinder body includes a second disk body and a plurality of second push rods, and the second push rods are evenly distributed along the circumference of the second disk body; The first cylinder and the second cylinder are both inserted into the drill tube, and the first push rod and the second push rod are on the same circumference; a rotating column is arranged inside one of the first push rod and the second push rod, and the rotating column can rotate, and a second torsion spring is arranged between the rotating column and the first push rod or the second push rod, and a film is wound on the rotating column, and the other end of the film is connected to the other of the first push rod and the second push rod; A transmission structure is connected between the first cylinder and the second cylinder, and the transmission structure is configured to drive the first cylinder and the second cylinder to rotate relative to each other, thereby making the first push rod and the second push rod approach or move away from each other, and initially the first push rod and the second push rod are in contact, and the film is in a winding state; A hinge column is provided at the bottom of the drill tube, and the drill bit is rotatably provided on the hinge column. A limit pin is provided on the hinge column, and the limit pin can slide along the radial direction of the hinge column. A limit groove is provided inside the drill bit. When the drill bit is in a vertical state, the limit pin and the limit groove are aligned and the limit pin extends out and inserts into the limit groove. A control airway is provided on the drill tube and the hinge shaft, and the control airway is connected to the limit pin. The extension and retraction of the limit pin are controlled by sucking air into the control airway. A first column is disposed at the upper end of the first cylinder, the first column is connected to the output end of the active cylinder, a second body is disposed at the upper end of the second cylinder, and the second column is rotatably inserted into the first column; A connecting groove is arranged at the top of the first cylinder, and a connecting boss is arranged at the inner top of the drill tube. Both the connecting boss and the connecting groove are polygonal. When the connecting boss is inserted into the connecting groove, the drill tube can drive the first cylinder to rotate.

2. A road construction drilling sampling device according to claim 1, characterized in that: The transmission structure includes a control motor, a transmission gear and a transmission ring gear. The control motor is arranged on the first disk body, and the transmission gear is connected to the output shaft of the control motor; the transmission ring gear is arranged on the second disk body, and the transmission ring gear is meshed with the transmission gear.

3. A road construction drilling sampling device according to claim 1, characterized in that: The inner peripheral walls of the first push rod and the second push rod are both provided with supporting protrusions. When the first push rod and the second push rod are in contact, the supporting protrusions of the two push rods are assembled into a hemispherical shape.

4. A road construction drilling sampling device according to claim 1, characterized in that: The inner cylinder is provided with jet holes and water spray ports. The water spray ports are located at the bottom of the inner cylinder and are evenly distributed along the circumference. The jet holes are located on the inner side wall of the inner cylinder and are evenly distributed along the circumference and axial direction of the inner cylinder. The inner cylinder is provided with an air supply channel and a water supply channel. The air supply channel is used to supply air to the jet holes, and the water supply channel is used to supply water to the water spray ports.

5. A road construction drilling sampling device according to claim 1, characterized in that: The lifting mechanism includes a slide, a screw and a handwheel; two guide slides are arranged on the frame, the slide can be slid up and down on the guide slides, the screw is vertically arranged on the frame and can rotate, the screw is inserted into the slide, and the screw is spirally connected to the slide; the handwheel is arranged on the top of the screw to drive the screw to rotate; the drill tube is connected to the slide and rises and falls with the slide.

6. A road construction drilling sampling device according to claim 5, characterized in that: The rotating mechanism includes a main motor, a rotating wheel and a transmission belt. The main motor is arranged on a slide. A transmission wheel is arranged at the output end of the main motor. The rotating wheel is rotatably arranged on the slide and sleeved on the top of the drill barrel. The rotating wheel can drive the drill barrel to rotate. The transmission belt is sleeved on the outside of the transmission wheel and the rotating wheel.

7. A road construction drilling sampling device according to claim 6, characterized in that: A support spring is arranged between the rotating wheel and the drill tube, the support spring extends vertically, and a pressure sensing device is installed at the fixing position between the support spring and the rotating wheel.

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