Asphalt pavement detection device

Abstract

The present invention belongs to the field of road surface detection technology, and in particular relates to an asphalt pavement detection device, comprising a detection base and a control box arranged above the detection base, a detection tube fixedly plugged into the end face of the detection base, a plurality of annular evenly distributed support feet fixedly installed on the bottom of the detection base, a detection electric control valve electrically connected to the control box installed on the inner lower side of the detection tube, and further comprising: an annular sealing seat installed on the bottom of the detection base. The present invention can improve the convenience of the sealing operation between the detection base and the asphalt pavement while ensuring the sealing between the detection base and the asphalt pavement, and the sealing material can be reused and does not need to be cleaned after detection, thereby simplifying the work process. At the same time, it can clean dust and moisture in the gaps of the asphalt pavement, improve the accuracy of water seepage detection, and increase detection efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of road surface detection, and in particular relates to an asphalt road surface detection device. Background Art

[0002] After the asphalt pavement construction is completed, due to factors such as fluctuations in raw material quality and differences in construction technology, problems such as insufficient compaction, poor flatness, and excessive water permeability coefficient are prone to occur. These defects will reduce the pavement's bearing capacity, cause rutting, water damage and other diseases, and shorten the pavement's service life. Therefore, the asphalt pavement must be fully inspected after construction to ensure road quality.

[0003] After asphalt pavement construction is completed, multiple parameters of the pavement need to be tested, including water seepage testing. Water seepage testing equipment is used to measure the pavement's water seepage performance at test points. This can assess the pavement's ability to prevent water infiltration and determine whether it has defects such as excessive pores that cause water seepage. For example, an asphalt pavement testing device is disclosed in Patent Publication No. CN112726349B.

[0004] When conducting a water seepage test on a road surface, the road surface is generally cleaned first, and then sealing material is applied to the outside of the test point. The water seepage detector is installed on the sealing material, and then a certain amount of water is poured in. The time required for the certain amount of water to drain away is calculated to measure the water seepage coefficient. However, on the one hand, the sealing material needs to be prepared on site and applied to a specific area in a regular circle, which makes the entire testing work more cumbersome. On the other hand, after the test is completed, the solidified sealing material needs to be cleaned. Summary of the Invention

[0005] The purpose of the present invention is to provide an asphalt pavement detection device in response to the above problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: an asphalt pavement detection device, comprising a detection base and a control box disposed above the detection base, a detection tube fixedly plugged into the end surface of the detection base, a plurality of annularly evenly distributed support legs fixedly mounted on the bottom of the detection base, a detection electric control valve electrically connected to the control box mounted on the inner lower side of the detection tube, and further comprising:

[0007] An annular sealing seat is installed at the bottom of the detection base. The annular sealing seat and the bottom of the detection base are jointly provided with an annular sealing groove, and the interior of the annular sealing groove is filled with paraffin filler. The notch of the annular sealing groove is detachably encapsulated with a heat-resistant elastic film, and a pressurizing component is installed in the annular sealing groove;

[0008] An air supply heating unit is installed on the side wall of the detection tube, and the air supply heating unit is used to heat the paraffin filler;

[0009] The cleaning unit is arranged at the bottom of the detection base and is connected to the air supply and heating unit. The cleaning unit is used to clean dust in the gaps in the road surface.

[0010] Preferably, the pressurizing assembly includes a piston ring slidably arranged on the upper side of the annular sealing groove, and a plurality of pressurizing rods are fixedly connected to the top of the piston ring, and each pressurizing rod is slidably connected to the top of the annular sealing groove, and the top of each pressurizing rod is commonly fixedly connected to a pressurizing ring.

[0011] Preferably, the air supply heating unit includes a mounting plate fixedly mounted on the outside of the detection tube, a heating box is fixedly mounted on the end of the mounting plate, and an electric heater is mounted inside the heating box, an air supply pipe is fixedly connected to the side wall of the heating box, an annular heat exchange plate is mounted inside the annular sealing groove, and the interior of the annular heat exchange plate is hollow, the annular heat exchange plate is connected to the air supply pipe, an exhaust pipe is fixedly mounted on the side wall of the annular heat exchange plate, and the air outlet end of the exhaust pipe extends to the outside of the annular sealing groove, an air pump is mounted on the top of the heating box, and the air outlet end of the air pump is connected to the inside of the heating box, the air pump and the electric heater are both electrically connected to the control box, a diversion component is mounted on the heating box, and the heating box is connected to the cleaning unit through the diversion component.

[0012] Preferably, the cleaning unit includes an annular cleaning groove provided at the bottom of the detection base, an annular plate is installed at the notch of the annular cleaning groove, a plurality of jet holes are provided on the end face of the annular plate, and the aperture of the air inlet end of the jet hole is larger than the aperture of the air outlet end, a shielding assembly is installed at the bottom of the detection tube, a reflux detection assembly and an adsorption assembly are installed on the detection tube, the reflux detection assembly is connected to the interior of the detection tube, the reflux detection assembly is connected to the adsorption assembly, and the adsorption assembly is connected to the suction end of the air pump.

[0013] Preferably, the diversion assembly includes a diversion pipe fixedly plugged into the bottom of the heating box, a diversion electric-controlled valve is installed inside the diversion pipe, a gas supply electric-controlled valve is installed inside the gas supply pipe, an air inlet hole is opened at the top of the annular cleaning groove, and the air inlet hole is connected to the diversion pipe, and the diversion electric-controlled valve and the gas supply electric-controlled valve are both electrically connected to the control box.

[0014] Preferably, the shielding assembly includes an annular mounting groove opened at the bottom of the detection tube, and two electromagnetic push rods are installed inside the annular mounting groove, the telescopic ends of the two electromagnetic push rods are jointly installed with a sealing pressure ring, and the bottom of the sealing pressure ring is fixedly installed with an annular rubber pad, the groove wall of the annular mounting groove is fixedly installed with an annular fixing plate, and a flexible sealing sleeve is fixedly arranged between the annular fixing plate and the outer edge of the sealing pressure ring.

[0015] Preferably, the backflow detection assembly includes a backflow pipe fixedly inserted into the side wall of the detection pipe, and the end of the backflow pipe is fixedly connected to a detection box, the end face of the detection box is inserted with a dust detection probe and a humidity detection probe, the top of the detection box is fixedly inserted with an upflow pipe at one end away from the detection box, and the dust detection probe and the humidity detection probe are both electrically connected to the control box.

[0016] Preferably, the adsorption assembly includes an annular box fixedly mounted on the outer wall of the detection tube, and partition nets are fixedly installed on both sides between the inner wall of the annular box and the outer tube wall of the detection tube. The interior of the annular box is filled with silica gel desiccant and activated carbon filler at positions on both sides of the two partition nets, respectively. The annular box is connected to the upstream pipe, and the annular box is connected to the suction end of the air pump.

[0017] Compared with existing technologies, the advantages of an asphalt pavement detection device are:

[0018] By cooperating with each other among the detection base, control box, detection tube, supporting foot, detection electric control valve, annular sealing seat, annular sealing groove, paraffin filler, heat-resistant elastic membrane and pressurizing component, and utilizing the solid-liquid conversion of the paraffin filler, the convenience of the sealing operation between the detection base and the asphalt pavement can be improved while ensuring the sealing between the detection base and the asphalt pavement. The sealing material can be reused and does not need to be cleaned after detection, which simplifies the work process and is easy to use.

[0019] The air supply heating unit can not only heat the paraffin, but also cooperate with the cleaning unit to clean the dust in the gaps of the detection points through high-speed airflow and dry the moisture in the detection points, so as to avoid the dust and moisture in the gaps of the asphalt pavement affecting the accuracy of water seepage detection.

[0020] By setting up a backflow detection component, the time spent on cleaning can be reduced based on the amount of dust and humidity in the backflow air, while ensuring that the road surface is cleaned thoroughly, which is conducive to improving the efficiency of water seepage detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of an asphalt pavement detection device provided by the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of an asphalt pavement detection device provided by the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of a heating box of an asphalt pavement detection device provided by the present invention;

[0024] Figure 4The present invention provides an asphalt pavement detection device Figure 2 A magnified view of the structure of part A;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of a flexible sealing sleeve of an asphalt pavement detection device provided by the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of a detection box of an asphalt pavement detection device provided by the present invention;

[0027] Figure 7 It is a schematic diagram of the internal structure of an annular box of an asphalt pavement detection device provided by the present invention.

[0028] In the figure: 1 detection base, 2 control box, 3 detection tube, 4 support foot, 5 detection electric control valve, 6 annular sealing seat, 7 annular sealing groove, 8 paraffin filler, 9 heat-resistant elastic membrane, 10 pressurizing assembly, 101 piston ring, 102 pressurizing rod, 103 pressurizing ring, 11 air supply heating unit, 111 mounting plate, 112 heating box, 113 electric heater, 114 air supply pipe, 115 annular heat exchange plate, 116 tail pipe, 117 air pump, 12 cleaning unit, 121 annular cleaning groove, 122 annular plate, 123 jet hole, 13 diversion assembly , 131 diversion pipe, 132 diversion electric control valve, 133 gas transmission electric control valve, 134 air inlet, 14 shielding assembly, 141 annular mounting groove, 142 electromagnetic push rod, 143 sealing pressure ring, 144 annular rubber pad, 145 annular fixing plate, 146 flexible sealing sleeve, 15 reflux detection assembly, 151 reflux pipe, 152 detection box, 153 dust detection probe, 154 humidity detection probe, 155 upflow pipe, 16 adsorption assembly, 161 annular box, 162 separation net, 163 silica gel desiccant, 164 activated carbon filler. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] like Figure 1-Figure 7As shown, an asphalt pavement detection device includes a detection base 1 and a control box 2 arranged above the detection base 1. A detection tube 3 is fixedly inserted into the end surface of the detection base 1. A plurality of annular evenly distributed support feet 4 are fixedly installed at the bottom of the detection base 1. A detection electric control valve 5 electrically connected to the control box 2 is installed on the lower side of the inner part of the detection tube 3. The device also includes: an annular sealing seat 6, which is installed at the bottom of the detection base 1. The annular sealing seat 6 and the bottom of the detection base 1 are jointly provided with an annular sealing groove 7, and the interior of the annular sealing groove 7 is filled with There is paraffin filler 8, the notch of the annular sealing groove 7 is removably encapsulated with a heat-resistant elastic film 9, the annular sealing groove 7 is installed with a pressurizing component 10, the pressurizing component 10 includes a piston ring 101 slidably arranged on the upper side of the inner part of the annular sealing groove 7, and the top of the piston ring 101 is fixedly connected with multiple pressurizing rods 102, and each pressurizing rod 102 is slidably connected to the top of the annular sealing groove 7, and the top of each pressurizing rod 102 is commonly fixedly connected with a pressurizing ring 103, wherein a detachable threaded sealing cap is provided on the top of the detection tube 3, which is opened during water injection detection.

[0031] The air supply heating unit 11 is installed on the side wall of the detection tube 3. The air supply heating unit 11 is used to heat the paraffin filler 8. The air supply heating unit 11 includes a mounting plate 111 fixedly mounted on the outside of the detection tube 3. A heating box 112 is fixedly mounted on the end of the mounting plate 111, and an electric heater 113 is installed inside the heating box 112. An air supply pipe 114 is fixedly connected to the side wall of the heating box 112. An annular heat exchange plate 115 is installed inside the annular sealing groove 7, and the interior of the annular heat exchange plate 115 is hollow. The annular heat exchange plate 115 is connected to the air supply pipe 114. An exhaust pipe 116 is fixedly connected to the side wall of the annular heat exchange plate 115, and the exhaust end of the exhaust pipe 116 extends to the outside of the annular sealing groove 7. An air pump 117 is installed on the top of the heating box 112, and the exhaust of the air pump 117 is fixedly connected to the side wall of the heating box 112. The end is connected with the interior of the heating box 112, the air pump 117 and the electric heater 113 are both electrically connected to the control box 2, the heating box 112 is equipped with a diverter component 13, and the heating box 112 is connected with the cleaning unit 12 through the diverter component 13, the diverter component 13 includes a diverter pipe 131 fixedly plugged into the bottom of the heating box 112, a diverter electric-controlled valve 132 is installed inside the diverter pipe 131, a gas supply electric-controlled valve 133 is installed inside the gas supply pipe 114, an air inlet hole 134 is provided at the top of the annular cleaning groove 121, and the air inlet hole 134 is connected with the diverter pipe 131, the diverter electric-controlled valve 132 and the gas supply electric-controlled valve 133 are both electrically connected to the control box 2, the diverter electric-controlled valve 132 is a normally closed valve, which opens after power is turned on, and the gas supply electric-controlled valve 133 is a normally open valve, which closes after power is turned on.

[0032] The cleaning unit 12 is arranged at the bottom of the detection base 1, and the cleaning unit 12 is connected to the air supply and heating unit 11. The cleaning unit 12 is used to clean the dust in the gaps in the road surface. The cleaning unit 12 includes an annular cleaning groove 121 opened at the bottom of the detection base 1, and an annular plate 122 is installed at the notch of the annular cleaning groove 121. The end surface of the annular plate 122 is provided with a plurality of jet holes 123, and the aperture of the air inlet end of the jet hole 123 is larger than the aperture of the air outlet end. The bottom of the detection tube 3 is installed with a shielding component 14, and the shielding component 14 includes an annular mounting groove 141 opened at the bottom of the detection tube 3, and the annular Two electromagnetic push rods 142 are installed inside the installation groove 141, and a sealing pressure ring 143 is installed together at the telescopic ends of the two electromagnetic push rods 142, and an annular rubber pad 144 is fixedly installed at the bottom of the sealing pressure ring 143. An annular fixing plate 145 is fixedly installed on the groove wall of the annular installation groove 141, and a flexible sealing sleeve 146 is fixedly arranged between the annular fixing plate 145 and the outer edge of the sealing pressure ring 143. After the annular rubber pad 144 moves down and abuts against the ground, the flexible sealing sleeve 146 is stretched downward and expanded. At this time, the flexible sealing sleeve 146 can provide sealing protection between the ground and the detection tube 3.

[0033] The detection tube 3 is equipped with a backflow detection component 15 and an adsorption component 16. The backflow detection component 15 is connected to the interior of the detection tube 3. The backflow detection component 15 includes a backflow pipe 151 fixedly inserted into the side wall of the detection tube 3, and the pipe end of the backflow pipe 151 is fixedly connected to the detection box 152. The end face of the detection box 152 is inserted with a dust detection probe 153 and a humidity detection probe 154. The top of the detection box 152 away from the end of the detection box 152 is fixedly inserted with an upflow pipe 155. The dust detection probe 153 and the humidity detection probe 154 are both electrically connected to the control box 2. The dust detection probe 153 measures the dust concentration by emitting infrared rays and calculating the intensity of the infrared rays received by its receiving end. The humidity detection probe 154 uses a humidity-sensitive material to contact the moisture in the airflow, and the moisture causes the resistance change of the humidity-sensitive material to measure the humidity in the airflow.

[0034] The reflux detection component 15 is connected to the adsorption component 16, and the adsorption component 16 is connected to the suction end of the air pump 117. The adsorption component 16 includes an annular box 161 fixedly sleeved on the outer wall of the detection tube 3, and a partition net 162 is fixedly installed on both sides between the inner wall of the annular box 161 and the outer tube wall of the detection tube 3. The interior of the annular box 161 is filled with silica gel desiccant 163 and activated carbon filler 164 on both sides of the two partition nets 162, respectively. The annular box 161 is connected to the upflow pipe 155, and the annular box 161 is connected to the suction end of the air pump 117. The top of the annular box 161 is provided with an annular opening, and an annular cover is installed at the annular opening for replacing the silica gel desiccant 163 and the activated carbon filler 164.

[0035] The operating principle of the present invention is now explained as follows: according to the road surface area and construction conditions, detection points are evenly selected at a certain interval, generally one point is selected for every 100 square meters, and special locations such as roadsides and rainwater inlets are avoided. After selecting a point, a cleaning device such as a cleaning brush is used to first clean obvious debris and other impurities on the road surface, and then the entire device is placed at the detection point. Then, the input end of the control box 2 is connected to an external portable power supply, and then the control box 2 is started;

[0036] After the control box 2 is started, it will immediately control the air pump 117 and the electric heater 113 to work. The air pump 117 can deliver air to the inside of the heating box 112, and the electric heater 113 can heat the air inside the heating box 112. The heating temperature is 60℃±1℃. The heated air enters the annular heat exchange plate 115 through the air supply pipe 114 and is finally discharged through the tail pipe 116. When the heated air passes through the annular heat exchange plate 115, the heated air will heat the paraffin filler 8 in the annular sealing groove 7. The paraffin filler 8 melts due to the heat and changes from solid to liquid. After heating for 2 minutes, the control box 2 sends a voice reminder through its own voice module. The staff manually presses the pressure ring 103. The pressure ring 103 drives the piston ring 101 downward through the pressure rod 102, thereby pressing the annular sealing groove 7. The melted paraffin filler 8 inside is pressurized, which can make the heat-resistant elastic membrane 9 expand and press against the ground. At the same time, the control box 2 controls the electric heater 113 to stop working. At this time, the temperature of the air delivered to the annular heat exchange plate 115 by the air pump 117 returns to normal temperature (because the electric heater 113 stops working, the air delivered by the air pump 117 will not continue to heat up), so that the melted paraffin filler 8 can be cooled, and the pressurized paraffin filler 8 will re-solidify. 2 minutes after the electric heater 113 stops working, the control box 2 issues a voice reminder. At this time, the staff can stop pressurizing the pressure ring 103. Since the paraffin filler 8 is converted from solid to liquid, and with the pressure applied by the piston ring 101 to the liquid paraffin filler 8, the paraffin filler 8 will cooperate with the heat-resistant elastic membrane 9 to pressurize and seal the detection base 1 and the asphalt road surface;

[0037] After heating for 3 minutes, the control box 2 controls the electromagnetic push rod 142 to work, and the electromagnetic push rod 142 will drive the sealing pressure ring 143 to move downward, and the sealing pressure ring 143 will drive the annular rubber pad 144 to resist the ground. At the same time, the flexible sealing sleeve 146 stretches downward and expands. The flexible sealing sleeve 146 cooperates with the annular rubber pad 144 and the sealing pressure ring 143 to block and seal the asphalt pavement and the detection tube 3. When the control box 2 controls the electromagnetic push rod 142 to work, it will synchronously control the diversion electric control valve 132 and the gas transmission electric control valve 133 to work. At this time, the gas transmission electric control valve 133 is energized to close and the diversion electric control valve 132 is energized to open. At the same time, the control box 2 controls the heating temperature of the electric heater 113 to be reduced to 40°C (to avoid causing the paraffin filler 8 to melt again). At this time, the hot air delivered by the air pump 117 enters the annular cleaning groove 121 through the diversion pipe 131 and the air inlet 134, and is ejected through each jet hole 123. The outer edge of 1 is sealed by paraffin filler 8 and heat-resistant elastic membrane 9, while the inner ground and detection tube 3 are sealed by sealing pressure ring 143, annular rubber pad 144 and flexible sealing sleeve 146. Therefore, the ejected gas will penetrate into the inner side of the asphalt pavement, thereby removing the dust and moisture embedded in the cracks of the asphalt pavement and maintaining the temperature at the detection point at around 40°C, improving its temperature stability (the different moisture content of the pavement itself will change its pore state. When the moisture content is high, the pores are occupied by water, which will make the detected water seepage amount smaller. Dust will block the pores in the pavement, causing the water seepage channel to narrow or block, reducing the water seepage amount and affecting the authenticity of the test results. Temperature changes will cause the asphalt pavement material to expand and contract, changing the size and shape of the pores, thereby affecting the water penetration rate and water seepage amount, resulting in a decrease in the accuracy of the test. Therefore, by fully cleaning the dust, drying the pavement and controlling the temperature, the accuracy of water seepage detection can be improved);

[0038] Secondly, because the suction end of the air pump 117 passes through the annular box 161, the upflow pipe 155, the detection box 152, and the return pipe 151, a negative pressure suction is generated inside the detection tube 3. Therefore, the airflow entering the asphalt pavement will flow back into the detection box 152 through the detection tube 3 and the return pipe 151. The dust detection probe 153 and the humidity detection probe 154 in the detection box 152 will detect the dust and moisture in the returning airflow. (The dust detection probe 153 measures the dust concentration by emitting infrared rays and calculating the infrared intensity received by its receiving end. The humidity detection probe 154 uses a humidity-sensitive material to contact the moisture in the airflow, and the moisture triggers a change in the resistance of the humidity-sensitive material, thereby measuring the humidity level in the airflow.) When the dust and moisture in the detection point are gradually cleaned, the dust and moisture contained in the air flow passing through the detection box 152 gradually decrease. When the dust amount is lower than the 5% threshold value, and the humidity is lower than the 20% threshold value, the dust detection probe 153 and the humidity detection probe 154 will feedback electrical signals to the control box 2. At this time, the control box 2 controls the air pump 117, the electric heater 113, the dust detection probe 153, the humidity detection probe 154, the electromagnetic push rod 142, the diversion electric control valve 132, and the gas transmission electric control valve 133 to stop working. The control box 2 sends a voice reminder through its own voice module to remind the staff to start the water seepage detection work. At the same time, the control box 2 controls the detection electric control valve 5 in the detection tube 3 to be energized and closed.

[0039] When performing water seepage detection, the staff pours an appropriate amount of water into the detection tube 3 so that the liquid level reaches the 700 ml scale line of the detection tube 3 (a plurality of scale lines are provided on the outer surface of the detection tube 3 to indicate the water level). After the water is poured, the detection button on the control box 2 is pressed. At this time, the control box 2 controls the detection electric control valve 5 to be powered off and closed. The water will quickly drop and fill the space between the heat-resistant elastic membrane 9 and the detection base 1 (the amount of water contained between this space and the detection electric control valve 5 is 100 ml). Then, the water seeps into the asphalt pavement. When the staff checks that the liquid level has dropped to the 50 ml level line, they press the detection button on the control box 2 again. At this time, the water seepage work is completed. The control box 2 will calculate the time of pressing the detection buttons on both sides. By calculating the time required for the water to be discharged, the water seepage performance of the asphalt pavement can be measured (if the water level still does not drop to 100 ml within 3 minutes, the water seepage performance of the point is qualified. At this time, the control box 2 issues a voice reminder, and the staff immediately shuts down the control box 2 and ends the detection work at the current point);

[0040] Among them, when the return air flow passes through the inside of the annular box 161, the moisture contained therein will be dried by the silica gel desiccant 163, and impurities such as dust will be adsorbed by the activated carbon filler 164. By absorbing moisture, dust and other impurities, the efficiency and thoroughness of dust cleaning and moisture drying inside the asphalt pavement can be ensured.

[0041] 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An asphalt pavement detection device, comprising a detection base (1) and a control box (2) arranged above the detection base (1), a detection tube (3) fixedly plugged into the end surface of the detection base (1), a plurality of annular evenly distributed support legs (4) fixedly mounted on the bottom of the detection base (1), a detection electric control valve (5) electrically connected to the control box (2) mounted on the inner lower side of the detection tube (3), characterized in that: Also includes: An annular sealing seat (6) is mounted on the bottom of the detection base (1), the annular sealing seat (6) and the bottom of the detection base (1) are both provided with an annular sealing groove (7), and the interior of the annular sealing groove (7) is filled with paraffin filler (8), the notch of the annular sealing groove (7) is detachably encapsulated with a heat-resistant elastic film (9), and the annular sealing groove (7) is installed with a pressurizing component (10); An air supply heating unit (11) is installed on the side wall of the detection tube (3), and the air supply heating unit (11) is used to heat the paraffin filler (8); A cleaning unit (12) is provided at the bottom of the detection base (1), and the cleaning unit (12) is connected to the air supply and heating unit (11), and the cleaning unit (12) is used to clean dust in the cracks of the road surface; The cleaning unit (12) includes an annular cleaning groove (121) provided at the bottom of the detection base (1), an annular plate (122) is installed at the notch of the annular cleaning groove (121), a plurality of jet holes (123) are provided on the end surface of the annular plate (122), and the aperture of the air inlet end of the jet hole (123) is larger than the aperture of the air outlet end, a shielding component (14) is installed at the bottom of the detection tube (3), a backflow detection component (15) and an adsorption component (16) are installed on the detection tube (3), the backflow detection component (15) is connected to the interior of the detection tube (3), the backflow detection component (15) is connected to the adsorption component (16), and the adsorption component (16) is connected to the suction end of the air pump (117); The backflow detection assembly (15) comprises a backflow pipe (151) fixedly plugged into the side wall of the detection pipe (3), and the end of the backflow pipe (151) is fixedly connected to a detection box (152), the end surface of the detection box (152) is plugged with a dust detection probe (153) and a humidity detection probe (154), and the top of the detection box (152) away from the detection box (152) is fixedly plugged with an upflow pipe (155), and the dust detection probe (153) and the humidity detection probe (154) are both electrically connected to the control box (2).

2. The asphalt pavement detection device according to claim 1, characterized in that: The pressurizing assembly (10) includes a piston ring (101) slidably arranged on the upper side of the annular sealing groove (7), a plurality of pressurizing rods (102) are fixedly connected to the top of the piston ring (101), and each pressurizing rod (102) is slidably connected to the top of the annular sealing groove (7), and the top of each pressurizing rod (102) is fixedly connected to a pressurizing ring (103).

3. The asphalt pavement detection device according to claim 1, characterized in that: The air supply heating unit (11) includes a mounting plate (111) fixedly mounted on the outside of the detection tube (3), a heating box (112) is fixedly mounted on the end of the mounting plate (111), and an electric heater (113) is installed inside the heating box (112), a gas supply pipe (114) is fixedly plugged into the side wall of the heating box (112), an annular heat exchange plate (115) is installed inside the annular sealing groove (7), and the inside of the annular heat exchange plate (115) is hollow, the annular heat exchange plate (115) is connected to the gas supply pipe (114), and the annular An exhaust pipe (116) is fixedly connected to the side wall of the heat exchange plate (115), and the exhaust end of the exhaust pipe (116) extends to the outside of the annular sealing groove (7). An air pump (117) is installed on the top of the heating box (112), and the exhaust end of the air pump (117) is connected to the interior of the heating box (112). The air pump (117) and the electric heater (113) are both electrically connected to the control box (2). The heating box (112) is installed with a diversion component (13), and the heating box (112) is connected to the cleaning unit (12) through the diversion component (13).

4. The asphalt pavement detection device according to claim 3, characterized in that: The diversion assembly (13) includes a diversion pipe (131) fixedly plugged into the bottom of the heating box (112), a diversion electric control valve (132) is installed inside the diversion pipe (131), and a gas supply electric control valve (133) is installed inside the gas supply pipe (114). An air inlet hole (134) is opened at the top of the annular cleaning groove (121), and the air inlet hole (134) is connected to the diversion pipe (131), and the diversion electric control valve (132) and the gas supply electric control valve (133) are both electrically connected to the control box (2).

5. The asphalt pavement detection device according to claim 1, characterized in that: The shielding assembly (14) includes an annular mounting groove (141) provided at the bottom of the detection tube (3), and two electromagnetic push rods (142) are installed inside the annular mounting groove (141), the telescopic ends of the two electromagnetic push rods (142) are commonly installed with a sealing pressure ring (143), and an annular rubber pad (144) is fixedly installed at the bottom of the sealing pressure ring (143), an annular fixing plate (145) is fixedly installed on the groove wall of the annular mounting groove (141), and a flexible sealing sleeve (146) is fixedly provided between the annular fixing plate (145) and the outer edge of the sealing pressure ring (143).

6. The asphalt pavement detection device according to claim 3, characterized in that: The adsorption assembly (16) includes an annular box (161) fixedly sleeved on the outer wall of the detection tube (3), and a partition net (162) is fixedly installed on both sides between the inner wall of the annular box (161) and the outer tube wall of the detection tube (3). The interior of the annular box (161) is filled with a silica gel desiccant (163) and an activated carbon filler (164) at positions on both sides of the two partition nets (162). The annular box (161) is connected to the upflow pipe (155), and the annular box (161) is connected to the suction end of the air pump (117).

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