A detection and sampling system and its usage method for road engineering

Abstract

The present invention relates to the technical field of sampling and testing for road engineering. Specifically, it relates to a detection sampling system and a usage method for road engineering. It includes a mobile trolley and a bracket arranged at the front end of the mobile trolley. Ultrasonic detectors are arranged on both sides of the bracket, and a drilling sampling mechanism for sampling is arranged on the bracket. A protective cover is sleeved on the drilling sampling mechanism. An exhaust hole is opened on one side of the protective cover. The third motor is used to drive the impeller to rotate, and the hydraulic rod is used to move the impeller upward. The impeller cleans the soil adhering to the inner wall of the bottom of the drill cylinder. During the rotation of the impeller, the surrounding gas is driven to flow downward, and air is pumped out from the inside to the outside in cooperation with the exhaust hole, so that the soil cleaned by the impeller is pumped out, thereby preventing the soil from adhering to the inner wall of the drill cylinder, preventing the soil on the inner wall of the drill cylinder from blocking the concave holes on the outer surface of the sampling material when the sampling material is taken out, and further affecting the detection of the ultrasonic detector, resulting in a decrease in the accuracy of the detection.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling and testing for road engineering, and more specifically, to a detection sampling system and a usage method for road engineering. Background Art

[0002] During the process of highway construction, in order to ensure the quality and safety of the road, usually after a section of road construction is completed, random sampling points are selected on this section of the road for sampling and testing. The method of sampling and testing is to drill a cylindrical sample on the road surface through a road core drill, and conduct various data tests on this sample to determine whether the construction of this section of the road is qualified.

[0003] When detecting the density of the sampled material taken out, in order to facilitate moving the drill cylinder filled with the sampled material upward together when extracting the drill cylinder, during the drilling process, the drilling depth usually exceeds the thickness of the concrete, so that the entire bottom of the sampled material can be directly taken out. For the drill cylinder exceeding the thickness of the concrete, soil and impurities will adhere to its inner wall. When the sampled material inside the drill cylinder is taken out later, the attached impurities and soil will block the concave holes on the sampled material, thus affecting the accuracy of the density detection of the sampled material. Summary of the Invention

[0004] The purpose of the present invention is to provide a detection sampling system and a usage method for road engineering to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention aims to provide a detection sampling system for road engineering, including a mobile trolley and a bracket provided at the front end of the mobile trolley. Ultrasonic detectors are provided on both sides of the bracket, and a drilling sampling mechanism for sampling is provided on the bracket. A protective cover is sleeved on the drilling sampling mechanism. An exhaust hole is opened on one side of the protective cover, and a flipping and lifting mechanism is provided beside the bottom of the drilling sampling mechanism. The flipping and lifting mechanism is used to drive a cleaning part provided at the end to extend into the protective cover. The cleaning part cleans the impurities and soil adhering to the drilling sampling mechanism, and uses an airbag provided in the cleaning part to fit with the protective cover to reduce the cross-sectional area of the exhaust hole, so that the cleaning part can extract the cleaned impurities.

[0006] As a further improvement of this technical solution, the drilling sampling mechanism includes a first motor provided on the bracket and a drill cylinder at the bottom of the first motor. A push rod coaxially connected to the output shaft of the first motor is slidably connected to the drill cylinder. A plurality of convex blocks are provided on the outer side of the push rod to drive the drill cylinder to rotate synchronously when the push rod rotates.

[0007] As a further improvement of this technical solution, the drill barrel is provided with an auxiliary system, which consists of a lead screw and a handwheel coaxially connected to the lead screw. The handwheel is located at the top of the lead screw, and the top of the lead screw is rotatably connected to a bracket. The first cross plate threadedly connected to the lead screw is rotatably connected to the casing at the upper end of the drill barrel, and the first cross plate is used to drive the drill barrel to move up and down.

[0008] As a further improvement of this technical solution, the flipping and lifting mechanism includes a second motor and a hydraulic rod. The hydraulic rod is fixedly connected to the second motor, and the second motor is connected between the support rod and the bracket. The output shaft of the second motor is slidably connected to the second cross plate and the support plate from bottom to top in sequence. One end of the hydraulic rod is fixedly connected to the second cross plate. The two ends of the support plate are respectively a support end and a cleaning end. A buffer pad for slowing down the impact of the sampled concrete is provided on the support end. The buffer pad is fitted in the outer casing, and the outer casing is rotatably connected to the support end.

[0009] As a further improvement of this technical solution, a first cavity for placing an airbag is opened in the cleaning end. The first cavity is the same size as the second cavity opened at the bottom of the protective cover. The second cavity is communicated with the exhaust hole, so that when the cleaning end and the protective cover are fitted, the airbag is lifted by the pressure, thereby reducing the cross-sectional area of the gas flowing through the exhaust hole.

[0010] As a further improvement of this technical solution, a baffle is fixedly connected to the bottom of the airbag. A plurality of vertical rods are arranged in an array at the bottom of the baffle. The vertical rods are slidably connected to the support plate, and a plurality of support plates are fixedly connected to the bottom of the auxiliary circular plate. A second spring sleeved on the upper end of the vertical rod is used to keep the airbag higher than the upper edge of the cleaning end, so that when the airbag moves down, the soil falling on the cleaning end is restricted.

[0011] As a further improvement of this technical solution, the cleaning part includes a third motor and an impeller. The transmission shaft coaxially connected to the output shaft of the third motor is slidably connected to the vertical cylinder. The impeller is coaxially connected to the top of the vertical cylinder, and a first spring provided in the vertical cylinder abuts against the transmission shaft. The vertical cylinder is slidably connected to the support plate, and the third motor is fixed at the end of the second cross plate.

[0012] As a further improvement of this technical solution, a cone is coaxially connected to the cleaning end. The hydraulic rod is slidably connected to the vertical cylinder, so that when the cone moves up, the cleaned soil slides down along the outer edge of the cone to the outside of the bottom.

[0013] As a further improvement of this technical solution, air holes are opened at the tops of both the drill barrel and the protective cover. The pull rod eccentrically connected to the top of the protective cover is slidably connected to the first cross plate, and the exhaust hole at the end of the protective cover is communicated with an external air extraction device and a purification device.

[0014] The second object of the invention is to provide a method for operating a detection and sampling system for road engineering described in any one of the above, which is characterized by including the following method steps:

[0015] S1. Drive the ejector rod to rotate through the output shaft of the first motor, and the ejector rod drives the drill cylinder to sample the concrete road surface to be sampled;

[0016] S2. After sampling, drive the support plate to rotate by the second motor, and the hydraulic rod jacks up the second cross plate to facilitate later cleaning work;

[0017] S3. Drive the impeller to rotate by the third motor, and the impeller cleans the impurities and soil at the bottom of the sampled concrete to prevent the small holes on the sample from being filled with soil and impurities when the sample is taken out, affecting the accuracy of the detection;

[0018] S4. The sampled material moves upward and is ejected, and then the two-sided ultrasonic detectors (101) are used to detect the sample.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In this detection and sampling system for road engineering, the third motor is used to drive the impeller to rotate, and the hydraulic rod is used to make the impeller move upward. The impeller cleans the soil and impurities attached to the inner wall of the bottom of the drill cylinder, and during the rotation of the impeller, the surrounding gas is driven to flow downward, and air is pumped out from the inside to the outside in cooperation with the exhaust holes, so that the lighter impurities and soil after the impeller cleaning are pumped out, thereby preventing impurities and soil from adhering to the inner wall of the drill cylinder, and preventing the soil and impurities on the inner wall of the drill cylinder from blocking the concave holes on the surface of the sampled material when the sampled material is taken out, which in turn affects the detection of the ultrasonic detector and reduces the accuracy of the detection.

[0021] 2. In this detection and sampling system for road engineering, when the cleaning end of the support plate fits with the bottom of the protective cover, under the action of pressure, the airbag moves upward and slides into the second cavity, and the airbag reduces the cross-sectional area of the exhaust hole, increasing the air flow velocity from the inside to the outside of the protective cover (increasing the pressure difference between the inside and the outside), thereby increasing the attraction to soil and impurities, and making the soil and impurities separate from the inner wall of the drill cylinder to ensure the accuracy of the detection.

[0022] 3. In this detection and sampling system for road engineering, after the airbag disengages from the second cavity, the cleaning end moves away from the bottom of the protective cover, and at this time the airbag is higher than the upper edge of the cleaning end, which can prevent the soil on the cleaning end from falling to the ground, thereby restricting the soil for later centralized cleaning.

[0023] 4. In the road engineering detection sampling system, during the sampling process, the drill tube is covered by a protective cover, the second cavity is connected to the ultrasonic detector, and the smoke and dust generated during sampling are sucked out by the exhaust mechanism to prevent the smoke and dust from affecting the surrounding environment, thereby protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a rear view of the overall structure of the present invention;

[0026] Figure 3 It is a left side view of the cutaway structure of the protective cover and the drill tube of the present invention;

[0027] Figure 4 It is a schematic diagram of the explosion structure of the second motor, hydraulic rod and support plate of the present invention;

[0028] Figure 5 It is a front view of the cross-section structure of the support plate, air bag and vertical tube of the present invention;

[0029] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0030] Figure 7 It is a front view of the internal structure of the protective cover and drill tube of the present invention.

[0031] The meaning of each number in the figure is:

[0032] 100, mobile cart; 101, ultrasonic detector; 102, auxiliary circular plate; 103, vertical pole; 104, second spring; 105, baffle; 110, lead screw; 111, hand wheel; 120, protective cover; 121, second cavity; 130, air bag;

[0033] 200, drilling sampling mechanism; 201, first motor; 202, mandrel; 203, drill tube;

[0034] 300, flip lifting mechanism; 301, second motor; 302, hydraulic rod; 303, support plate; 304, first cavity; 310, buffer pad; 320, cone;

[0035] 400, cleaning unit; 401, third motor; 402, impeller; 403, vertical cylinder; 404, first spring. DETAILED DESCRIPTION

[0036] The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined. Embodiment

[0039] As Figure 1 、 Figure 2 and Figure 5 shown, a detection and sampling system and a usage method for road engineering are provided, including a mobile trolley 100 and a bracket arranged at the front end of the mobile trolley 100. Ultrasonic detectors 101 are arranged on both sides of the bracket, and a drilling sampling mechanism 200 for sampling is arranged on the bracket. A protective cover 120 is sleeved on the drilling sampling mechanism 200. An exhaust hole is opened on one side of the protective cover 120. When the drilling sampling mechanism 200 samples, a suction device connected to one end of the exhaust hole is used to suck the generated soot, so that the sucked soot passes through a purification device which adopts the method of introducing the soot into water, and finally the clean air is discharged into the air. And a flipping and lifting mechanism 300 is arranged beside the bottom of the drilling sampling mechanism 200. The flipping and lifting mechanism 300 is used to drive a cleaning part 400 arranged at the end to extend into the protective cover 120, so as to clean the impurities and soil attached to the inside of the drilling sampling mechanism 200 through the cleaning part 400, and the airbag 130 arranged in the cleaning part 400 is used to fit with the protective cover 120 to reduce the cross-sectional area of the exhaust hole, so that the cleaning part 400 can extract the impurities and soil.

[0040] Therefore, on the basis of the above structure, throughFigure 3 The structure of the drilling and sampling mechanism 200 is further disclosed. The drilling and sampling mechanism 200 includes a first motor 201 disposed on a bracket and a drill barrel 203 at the bottom of the first motor 201. A push rod 202 coaxially connected to the output shaft of the first motor 201 is slidably connected to the drill barrel 203. A plurality of bumps are disposed on the outer side of the push rod 202. Thus, when the push rod 202 rotates, the drill barrel 203 is driven to rotate synchronously.

[0041] On the other hand, the drill barrel 203 is provided with an auxiliary system. The auxiliary system is composed of a lead screw 110 and a hand wheel 111 coaxially connected to the lead screw 110. The hand wheel 111 is located at the top end of the lead screw 110, and the top of the lead screw 110 is rotatably connected to the bracket. A first cross plate threadedly connected to the lead screw 110 is rotatably connected to a sleeve at the upper end of the drill barrel 203. By rotating the hand wheel 111 to drive the lead screw 110 to rotate, the first cross plate is caused to push the drill barrel 203 downward to detect the concrete road surface to be sampled.

[0042] Also, since a pull rod eccentrically connected to the top end of the protective cover 120 is slidably connected to the first cross plate, when the drill barrel 203 moves downward, under the action of gravity, the protective cover 120 and the drill barrel 203 move downward together. After the protective cover 120 contacts the ground, a smoke extraction device is used to collect the smoke and dust generated during the sampling of the drill barrel 203. The smoke and dust are discharged into the air after passing through a purification device, thereby preventing the smoke and dust from polluting the surrounding air.

[0043] After the sampling is completed, the drill barrel 203 is moved upward by reversely rotating the lead screw 110 to take out the sampling material. At this time, the first cross plate drives the pull rod to move the protective cover 120 upward to prepare for cleaning the soil on the inner wall of the drill barrel 203 later.

[0044] Herein, in combination with Figure 4 shown, the specific structure of the flipping and lifting mechanism 300 is disclosed. The flipping and lifting mechanism 300 includes a second motor 301 and a hydraulic rod 302. The hydraulic rod 302 is fixedly connected to the second motor 301. The second motor 301 is connected between a support rod and a bracket. The output shaft of the second motor 301 is slidably connected to a second cross plate and a support plate 303 in sequence from bottom to top. One end of the hydraulic rod 302 is fixedly connected to the second cross plate. And the two ends of the support plate 303 are a support end and a cleaning end respectively. Thus, by driving the support plate 303 to rotate by the second motor 301, the cleaning end of the second motor 301 is located directly below the protective cover 120. In cooperation with the hydraulic rod 302 pushing the second cross plate upward, after the cleaning part 400 contacts the cleaning end, the cleaning part 400 and the support plate 303 move upward together, thereby cleaning the soil on the inner wall of the bottom end of the drill barrel 203 by moving the cleaning part 400 up and down.

[0045] Therefore, in combination with Figure 5 and Figure 7As shown, the structure of the cleaning part 400 is disclosed. The cleaning part 400 includes a third motor 401 and an impeller 402. A transmission shaft coaxially connected to the output shaft of the third motor 401 is slidably connected to a vertical cylinder 403. The top of the vertical cylinder 403 is coaxially connected to the impeller 402. And a first spring 404 provided in the vertical cylinder 403 abuts against the transmission shaft. The vertical cylinder 403 is slidably connected to a support plate 303. The third motor 401 is fixed at the end of the second cross plate. In this way, when the second cross bar pushes the support plate 303 to move upward, the cleaning end moves upward until the cleaning end fits with the bottom of the protective cover 120.

[0046] Also, since a cone 320 is coaxially connected to the cleaning end, a hydraulic rod 302 is slidably connected to the vertical cylinder 403. A first cavity 304 for placing an airbag 130 is formed in the cleaning end. The first cavity 304 has the same size as a second cavity 121 formed at the bottom of the protective cover 120. The second cavity 121 is communicated with an exhaust hole. On the other hand, air holes are formed at the tops of the drill cylinder 203 and the protective cover 120. In this way, when the cleaning end fits with the bottom of the protective cover 120, the airbag 130 moves upward under the action of pressure, thereby reducing the cross-sectional area of the gas flowing through the exhaust hole, increasing the gas flow rate inside the protective cover 120, increasing the attraction force on soil and impurities, separating the soil from the inner wall of the drill cylinder 203, and preventing the soil from clogging the concave holes on the sampling material when the sampling material comes out, so as to ensure the accuracy of the detection.

[0047] At the same time, after the cleaning end fits with the bottom of the protective cover 120, the soil cleaning work is carried out next. The impeller 402 cleans the soil on the inner wall of the drill cylinder 203. The heavier soil slides down along the hydraulic rod 302 onto the cleaning end (the soil is blocked by the protective cover 120), while the lighter soil and impurities are sucked away under the action of pressure.

[0048] Furthermore, after the impeller 402 finishes cleaning, the hydraulic rod 302 moves downward to disengage the impeller 402 from the protective cover 120 (that is, the upper edge of the impeller 402 should be lower than the height of the protective cover 120 to prevent the impeller 402 from colliding with the protective cover 120 when rotating later if it is not completely disengaged). After disengagement, the airbag 130 blocks the soil around the outer edge of the cone 320 to prevent the soil from falling to the ground and requiring re-cleaning.

[0049] The following is in cooperation with Figure 6As shown, the bottom of the airbag 130 is fixedly connected to the baffle 105. Multiple vertical rods 103 are arranged at the bottom of the baffle 105 in an array. The vertical rods 103 are slidably connected to the support plate 303, and the bottoms of the multiple support plates 303 are fixedly connected to the auxiliary circular plate 102. The second spring 104 sleeved on the upper end of the vertical rod 103 is used to keep the airbag 130 higher than the upper edge of the cleaning end. The purpose of doing this is that: when the airbag 130 is separated, the airbag 130 is always kept higher than the upper edge of the cleaning end, so as to limit the soil on the cleaning end and prevent the soil from directly falling to the ground and affecting the cleaning.

[0050] Therefore, by pulling the auxiliary circular plate 102, the airbag 130 is retracted into the first cavity 304, and then the soil and impurities on the cleaning end are cleaned.

[0051] It should be noted that: during the sampling process, the cleaning end and the support end are respectively on the left and right sides and are parallel to the ultrasonic detectors 101 on both sides (cooperating Figure 1 as shown, so as to ensure the smooth progress of sampling).

[0052] In addition, after all the cleaning work is completed, the sampling material is detected by the ultrasonic detector 101 below. For this purpose, by rotating the support end to directly below the protective cover 120, and then using the lead screw 110 to rotate, the ejector rod 202 slides in the drill barrel 203. Under the action of the ejector rod 202, the sampling material in the drill barrel 203 gradually abuts against the ejector rod 202 until the sampling material is ejected out of the drill barrel 203.

[0053] In order to prevent the sampling material on the falling support end from breaking and affecting the detection accuracy, therefore, a buffer pad 310 for slowing down the impact of the sampled concrete is provided on the support end to protect the sampling material. Secondly, after the sampling material falls onto the buffer pad 310, the ejector rod 202 is still in contact with the top end of the sampling material at this time (because the buffer pad 310 is embedded in the housing and the housing is rotatably connected to the support end, so the sampling material is driven to rotate by the friction between the ejector rod 202 and the sampling material). In this way, the first motor 201 can be used to drive the ejector rod 202 to rotate, so that the ultrasonic detectors 101 on both sides can detect the density of the sampling material.

[0054] The second object of the invention is to provide a method for using a detection and sampling system for road engineering, including the following method steps:

[0055] S1. Drive the ejector rod 202 to rotate through the output shaft of the first motor 201, and the ejector rod 202 drives the drill barrel 203 to sample the concrete road surface to be sampled;

[0056] S2. After sampling, use the second motor 301 to drive the support plate 303 to rotate, and the hydraulic rod 302 pushes the second cross plate upward to facilitate later cleaning work;

[0057] S3. The third motor 401 drives the impeller 402 to rotate, and the impeller 402 cleans the impurities and soil at the bottom of the sampled concrete to prevent the small holes on the sample from being filled with soil and impurities when the sample is taken out, which may affect the accuracy of the detection;

[0058] S4. The sampled material moves upward and is pushed out, and then the sample is detected by the ultrasonic detectors 101 on both sides.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A road engineering detection sampling system, comprising a mobile cart (100) and a bracket arranged at the front end of the mobile cart (100), ultrasonic detectors (101) are arranged on both sides of the bracket, and a drilling sampling mechanism (200) for sampling is arranged on the bracket, characterized in that: The drilling sampling mechanism (200) is covered with a protective cover (120), one side of the protective cover (120) is provided with an exhaust hole, and a flip lifting mechanism (300) is provided at the side of the bottom of the drilling sampling mechanism (200), the flip lifting mechanism (300) is used to drive a cleaning part (400) provided at the end to extend into the protective cover (120), the cleaning part (400) cleans impurities and soil attached to the drilling sampling mechanism (200), and uses an air bag (130) provided in the cleaning part (400) to match the protective cover (120) to reduce the cross-sectional area of ​​the exhaust hole, so that the cleaning part (400) can extract the cleaned impurities; The flipping and lifting mechanism (300) comprises a second motor (301) and a hydraulic rod (302), wherein the hydraulic rod (302) is fixedly connected to the second motor (301), and the second motor (301) is connected via a support rod and a bracket, and an output shaft of the second motor (301) is slidably connected to a second transverse plate and a support plate (303) in sequence from bottom to top, and the hydraulic rod (302) is fixedly connected to one end of the second transverse plate, and the two ends of the support plate (303) are respectively a support end and a cleaning end, and a buffer pad (310) is provided on the support end for mitigating the impact of the sampled concrete, and the buffer pad (310) is embedded in an outer shell, and the outer shell is rotatably connected to the support end; A first cavity (304) for accommodating the airbag (130) is provided in the cleaning end, the first cavity (304) and a second cavity (121) provided at the bottom of the protective cover (120) are of the same size, and the second cavity (121) is connected to the exhaust hole, so that when the cleaning end and the protective cover (120) are matched, the airbag (130) is moved upward by pressure, thereby reducing the cross-sectional area of ​​the gas flowing through the exhaust hole; The cleaning part (400) comprises a third motor (401) and an impeller (402); the transmission shaft coaxially connected to the output shaft of the third motor (401) is slidably connected to the vertical cylinder (403); the top of the vertical cylinder (403) is coaxially connected to the impeller (402); a first spring (404) provided in the vertical cylinder (403) abuts against the transmission shaft; the vertical cylinder (403) is slidably connected to the support plate (303); and the third motor (401) is fixed to the end of the second horizontal plate; A cone (320) is coaxially connected to the cleaning end, and the hydraulic rod (302) is slidably connected to the vertical cylinder (403) so that when the cone (320) moves upward, the cleaned soil slides along the outer edge of the cone (320) to the outside of the bottom.

2. The road engineering detection sampling system according to claim 1, characterized in that: The drilling sampling mechanism (200) comprises a first motor (201) arranged on a bracket and a drill tube (203) at the bottom of the first motor (201); a push rod (202) coaxially connected to an output shaft of the first motor (201) is slidably connected to the drill tube (203); a plurality of protrusions are arranged on the outer side of the push rod (202) so as to drive the drill tube (203) to rotate synchronously when the push rod (202) rotates.

3. The road engineering detection sampling system according to claim 2 is characterized in that: The drill tube (203) is provided with an auxiliary system, which is composed of a lead screw (110) and a hand wheel (111) coaxially connected to the lead screw (110); the hand wheel (111) is located at the top of the lead screw (110); the top of the lead screw (110) is rotatably connected to a bracket; a first horizontal plate threadedly connected to the lead screw (110) is rotatably connected to a sleeve at the upper end of the drill tube (203); and the first horizontal plate is used to drive the drill tube (203) to move up and down.

4. The road engineering detection sampling system according to claim 1, characterized in that: The bottom of the airbag (130) is fixedly connected to the baffle (105), a plurality of vertical poles (103) are arranged in an array at the bottom of the baffle (105), the vertical poles (103) are slidably connected to the support plate (303), and the bottoms of the plurality of support plates (303) are fixedly connected to the auxiliary circular plate (102), and a second spring (104) sleeved on the upper end of the vertical pole (103) is used to keep the airbag (130) higher than the upper edge of the cleaning end, so that when the airbag (130) moves downward, the soil falling on the cleaning end is restricted.

5. The road engineering detection sampling system according to claim 2, characterized in that: The top ends of the drill tube (203) and the protective cover (120) are both provided with air holes, a pull rod connected to the eccentric shaft at the top end of the protective cover (120) is slidably connected to the first transverse plate, and the exhaust hole at the end of the protective cover (120) is connected to an external exhaust device and a purification device.

6. A method for operating the road engineering detection sampling system according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: S1. The output shaft of the first motor (201) drives the push rod (202) to rotate, and the push rod (202) drives the drill tube (203) to sample the concrete pavement to be sampled; S2, after sampling, the second motor (301) is used to drive the support plate (303) to rotate, and the hydraulic rod (302) pushes the second horizontal plate upwards to facilitate cleaning work later; S3, the third motor (401) drives the impeller (402) to rotate, and the impeller (402) cleans the impurities and soil at the bottom of the sampled concrete to prevent the small holes on the sample from being filled with soil and impurities when the sample falls out, thereby affecting the accuracy of the detection; S4, the sampled material moves upward and is ejected, and then the sample is detected by the ultrasonic detectors (101) on both sides.

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