Penetration detection device for asphalt concrete test piece

Abstract

The invention relates to the technical field of asphalt concrete penetration detection, and discloses a penetration detection device for an asphalt concrete test piece, which comprises a detection frame I, a detection frame II arranged below the detection frame I, a hose arranged at the top of the detection frame I, and a water supply device communicated with one end, far away from the detection frame I, of the hose, a supporting rod is fixedly connected to the lower surface of the second detection frame, a detection part is arranged on the surface of the first detection frame, an exhaust part is arranged at the end, close to the second detection frame, of the first detection frame, and a vibration part is arranged on the surface of the exhaust part. When concrete needs to be added into the first detection frame, an electric push rod is started to push a center frame to move upwards, the center frame slides on the surface of a round rod, the center frame is limited through the round rod, the stability of the center frame in the moving process is improved, and when the center frame moves, a disc in the first detection frame is pushed through a bent plate to move upwards; and at the moment, the disc in the detection frame II moves upwards along with the bent plate.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt concrete penetration detection, in particular to a penetration detection device for an asphalt concrete test piece. Background Art

[0002] Concrete penetration test is an important method to evaluate the ability of concrete to resist the penetration of liquid, gas or ions, and thus determine its durability. The test simulates the intrusion of corrosive media and water in the external environment to detect the penetration resistance of concrete. The principle of concrete penetration test is to apply a certain pressure or concentration difference to allow liquid, gas or ions to pass through the concrete specimen, and then measure the penetration rate or amount to evaluate the concrete's penetration resistance. The main purpose of the test is to determine the permeability of concrete under specific conditions;

[0003] When pouring concrete into the interior of the experimental device for penetration testing, gas can easily enter the interior of the experimental device along with the concrete. When the gas gathers inside the experimental device, it will cause bubbles to appear in the concrete. The presence of bubbles in the concrete will cause the compactness of the concrete to decrease, affecting the accuracy of the concrete penetration test results. Summary of the invention

[0004] The purpose of the present invention is to provide a penetration detection device for asphalt concrete specimens to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a penetration detection device for asphalt concrete specimens, comprising a detection frame 1, a detection frame 2 is arranged below the detection frame 1, a hose is arranged on the top of the detection frame 1, an end of the hose away from the detection frame 1 is connected to a water supply device, a support rod is fixedly connected to the lower surface of the detection frame 2, a detection component is arranged on the surface of the detection frame 1, an exhaust component is arranged at one end of the detection frame 1 and the detection frame 2 close to each other, a vibration component is arranged on the surface of the exhaust component, a graduated tube is arranged at the bottom of the detection frame 2, and a discharge valve is connected to the bottom of the graduated tube;

[0007] The detection component includes a round rod, a fixing frame is fixedly connected to the surface of the round rod, two fixing frames are provided, and the ends of the two fixing frames close to each other are respectively fixedly connected to the detection frame one and the detection frame two, a center frame is fixedly connected to the surface of the round rod, an electric push rod is fixedly connected to the surface of the center frame, the bottom of the electric push rod is fixedly connected to the surface of the fixing frame, a bent plate is fixedly connected to the surface of the center frame, a disc is fixedly connected to the end of the bent plate away from the center frame, a cylindrical tube is connected to the surface of the disc, a sealing gasket is fixedly connected to the surface of the disc, a sieve frame is fixedly connected to the end of the disc away from the bent plate, and a conical frame is fixedly connected to the surface of the sieve frame.

[0008] Furthermore, the end of the round rod passes through the fixed frame and extends to the outer end of the fixed frame, the electric push rod is located at the end of the center frame away from the detection frame one, the surface of the sealing gasket contacts the inner wall of the detection frame one, and the number of the discs is two, and the two discs are symmetrically arranged with the center frame as the center.

[0009] Furthermore, one end of the conical frame away from the sieve frame is inclined toward the surface of the sealing gasket, one end of the hose away from the water supply device is plugged into the inner wall of the cylindrical tube, the top of the calibrated tube is fixedly connected to the bottom of the disc, and is interconnected with the second detection frame through the cylindrical tube.

[0010] Further, the exhaust component includes a circular groove ring, which is arranged at one end where the detection frame one and the detection frame two are close to each other, and the end where the detection frame one and the detection frame two are close to each other is rotatably connected to the inner wall of the circular groove ring, the end of the center frame is fixedly connected with an extrusion ring, the bottom of the extrusion ring is hinged with a tripod, the bottom of the tripod is hinged with a round hole rod, the surface of the detection frame two is fixedly connected with a limit ring, the surface of the limit ring is fixedly connected with a sliding rod frame, the surface of the circular groove ring is fixedly connected with an engaging ring, the surface of the engaging ring is engaged with a tooth plate, the surface of the tooth plate is fixedly connected with a connecting rod, the end of the connecting rod away from the tooth plate is fixedly connected to the end of the circular hole rod, and the inner wall of the circular groove ring is fixedly connected with a mixing plate.

[0011] Furthermore, the inner wall of the round hole rod is slidably connected to the surface of the slide rod frame, the number of the connecting rods is two, the two connecting rods are oppositely arranged, and the end of the slide rod frame extends to the outer end of the round hole rod.

[0012] Furthermore, the vibration component includes a positioning ring, the inner wall of the positioning ring is fixedly connected to the inner wall of the detection frame 2, the surface of the positioning ring is fixedly connected to a groove plate, the surface of the linkage rod is fixedly connected to a connecting rod, the surface of the connecting rod is fixedly connected to a spring sheet, and the end of the spring sheet away from the connecting rod is fixedly connected to a triangular block.

[0013] Furthermore, the positioning ring is located above the limiting ring, the surface of the triangular block contacts the inner wall of the groove plate, and two spring plates are arranged on the surface of the triangular block, and the two spring plates are symmetrically arranged with the triangular block as the center.

[0014] The present invention has the following beneficial effects:

[0015] When the present invention needs to add concrete to the interior of the detection frame one, the electric push rod is started to push the center frame to move upward, and the center frame slides on the surface of the round rod. The round rod is used to limit the center frame to improve the stability of the center frame when moving. When the center frame moves, the disc in the detection frame one is pushed upward by the bent plate. At this time, the disc in the detection frame two will also move upward with the bent plate. When the disc is separated from the inner wall of the detection frame one, concrete can be added to the interior of the detection frame one and the detection frame two for penetration testing. At this time, the disc is started to enter the interior of the detection frame one to seal the detection frame one, and the water supply device is started. The device pushes water to flow into the inside of the hose. The water flows through the hose into the inner wall of the cylindrical tube and gathers on the surface of the concrete through the sieve frame. The water that penetrates through the concrete will pass through the cylindrical tube into the inside of the graduated tube. The staff can observe the height of the water entering the graduated tube to detect the permeability of the concrete. When it is necessary to unload the concrete inside the detection frame 2, the center frame is started to push the bent plate downward. When moving, the bent plate will push the disc in the detection frame 2 to move downward. At the same time, the disc in the detection frame 1 can push the concrete downward, thereby improving the convenience of replacing concrete.

[0016] When the center frame of the present invention moves, the extrusion ring pushes the tripod to deform. When the tripod expands, it pushes the round hole rod to slide on the surface of the sliding rod frame. When the round hole rod moves, it pushes the tooth plate to move through the connecting rod. When the tooth plate moves, it pushes the circular groove ring to rotate at the bottom of the detection frame through the meshing ring. When the circular groove ring rotates, it drives the mixing plate to rotate. The mixing plate is used to stir the concrete flow, so as to avoid gas storage in the concrete to generate bubbles, which affects the detection result of concrete penetration.

[0017] When the linkage rod of the present invention moves, it pushes the spring sheet to move through the connecting rod, and when the spring sheet moves, it drives the triangular block to move on the surface of the groove plate. The triangular block can extend to the inside of the groove of the groove plate by utilizing the elasticity of the spring sheet, and as the groove plate continuously contracts and extends during movement, when the triangular block contacts the inner wall of the groove of the groove plate, vibration will be generated, and the vibration will be transmitted to the second detection frame through the positioning ring. The gas in the concrete can be quickly discharged through the vibration, so as to avoid the gas gathering inside the concrete and affecting the penetration detection result.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

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

[0021] Figure 2 This is a schematic diagram of the structure of the graduated tube of the present invention;

[0022] Figure 3 This is a schematic diagram of the installation structure of the exhaust component of the present invention;

[0023] Figure 4 It is a schematic diagram of the overall structure of the detection component of the present invention;

[0024] Figure 5 It is a schematic diagram of the overall structure of the exhaust component of the present invention;

[0025] Figure 6 It is a schematic diagram of the overall structure of the vibration component of the present invention;

[0026] Figure 7 For the present invention Figure 6 A magnified schematic diagram of part A in FIG.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] In the figure: 1. Detection frame 1; 2. Detection frame 2; 3. Support rod; 4. Water supply device; 5. Hose; 6. Graduation tube; 7. Discharge valve; 8. Detection component; 9. Exhaust component; 10. Vibration component; 20. Center frame; 21. Round rod; 22. Sealing pad; 23. Fixed frame; 24. Disc; 25. Cylindrical tube; 26. Sieve frame; 27. Conical frame; 28. Bend plate; 29. ​​Electric push rod; 30. Circular groove ring; 31. Mixing plate; 32. Tooth plate; 33. Tripod; 34. Circular hole rod; 35. Sliding rod frame; 36. Limiting ring; 37. Extrusion ring; 38. Engaging ring; 39. Linking rod; 40. Positioning ring; 41. Groove plate; 42. Connecting rod; 43. Shrapnel; 44. Triangle block. DETAILED DESCRIPTION

[0029] 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 creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 7 As shown, the present invention is a penetration detection device for asphalt concrete specimens, including a detection frame 1, a detection frame 2 is arranged below the detection frame 1, a hose 5 is arranged on the top of the detection frame 1, and the end of the hose 5 away from the detection frame 1 is connected to a water supply device 4, the lower surface of the detection frame 2 is fixedly connected to a support rod 3, a detection component 8 is arranged on the surface of the detection frame 1, an exhaust component 9 is arranged at the end where the detection frame 1 and the detection frame 2 are close to each other, a vibration component 10 is arranged on the surface of the exhaust component 9, a calibration tube 6 is arranged at the bottom of the detection frame 2, and a discharge valve 7 is connected to the bottom of the calibration tube 6;

[0031] The detection component 8 includes a round rod 21, and a fixing frame 23 is fixedly connected to the surface of the round rod 21. There are two fixing frames 23, and the ends of the two fixing frames 23 close to each other are respectively fixedly connected to the detection frame 1 and the detection frame 2 2. The surface of the round rod 21 is fixedly connected to the center frame 20, and the surface of the center frame 20 is fixedly connected to the electric push rod 29, and the bottom of the electric push rod 29 is fixedly connected to the surface of the fixing frame 23. The surface of the center frame 20 is fixedly connected to a bent plate 28, and the end of the bent plate 28 away from the center frame 20 is fixedly connected to a disc 24, and the surface of the disc 24 is connected to a cylindrical tube 25. The surface of the disc 24 is fixedly connected to a sealing gasket 22, and the end of the disc 24 away from the bent plate 28 is fixedly connected to a sieve frame 26, and the surface of the sieve frame 26 is fixedly connected to a conical frame 27.

[0032] The end of the round rod 21 passes through the fixed frame 23 and extends to the outer end of the fixed frame 23. The electric push rod 29 is located at the end of the center frame 20 away from the detection frame 1. When the present invention needs to add concrete to the inside of the detection frame 1, the electric push rod 29 is started to push the center frame 20 to move upward. The center frame 20 slides on the surface of the round rod 21. The round rod 21 is used to limit the center frame 20 to improve the stability of the center frame 20 when moving. When the center frame 20 moves, it pushes the disc 24 in the detection frame 1 to move upward through the bent plate 28. At this time, the disc 24 in the detection frame 22 will also move upward with the bent plate 28. When the disc 24 is separated from the inner wall of the detection frame 1, concrete can be added to the inside of the detection frame 1 and the detection frame 22 for penetration detection. At this time, the disc 24 is started to enter the inside of the detection frame 1 to seal the detection frame 1. Starting the water supply device 4 pushes the water to flow into the inside of the hose 5. The water flows through the hose 5 into the inner wall of the cylindrical tube 25 and gathers on the surface of the concrete through the sieve frame 26. The water that penetrates through the concrete will pass through the cylindrical tube 25 into the inside of the graduated tube 6. The staff can observe the height of the water entering the graduated tube 6 to detect the permeability of the concrete. When it is necessary to unload the concrete inside the detection frame 22, start the center frame 20 to push the bent plate 28 to move downward. The bent plate 28 will push the disc 24 in the detection frame 22 to move downward when moving. At the same time, the disc 24 in the detection frame 1 can push the concrete to move downward, thereby improving the convenience of replacing the concrete. The surface of the sealing gasket 22 contacts the inner wall of the detection frame 1. There are two discs 24, and the two discs 24 are symmetrically arranged with the center frame 20 as the center.

[0033] One end of the conical frame 27 away from the sieve frame 26 is inclined toward the surface of the sealing gasket 22, and one end of the hose 5 away from the water supply device 4 is plugged into the inner wall of the cylindrical tube 25. The top of the calibrated tube 6 is fixedly connected to the bottom of the disc 24, and is connected to the detection frame 22 through the cylindrical tube 25.

[0034] The exhaust component 9 includes a circular groove ring 30, which is arranged at one end where the detection frame 1 and the detection frame 2 are close to each other, and the end where the detection frame 1 and the detection frame 2 are close to each other is rotatably connected to the inner wall of the circular groove ring 30, the end of the center frame 20 is fixedly connected with an extrusion ring 37, the bottom of the extrusion ring 37 is hinged with a tripod 33, the bottom of the tripod 33 is hinged with a round hole rod 34, the surface of the detection frame 2 is fixedly connected with a limit ring 36, the surface of the limit ring 36 is fixedly connected with a sliding rod frame 35, the surface of the circular groove ring 30 is fixedly connected with an engagement ring 38, the surface of the engagement ring 38 is meshed with a tooth plate 32, the surface of the tooth plate 32 is fixedly connected with a connecting rod 39, the end of the connecting rod 39 away from the tooth plate 32 is fixedly connected to the end of the round hole rod 34, and the inner wall of the circular groove ring 30 is fixedly connected with a mixing plate 31.

[0035] The inner wall of the round hole rod 34 is slidably connected with the surface of the slide rod frame 35. When the center frame 20 of the present invention moves, the extrusion ring 37 pushes the tripod 33 to deform. When the tripod 33 expands, it pushes the round hole rod 34 to slide on the surface of the slide rod frame 35. When the round hole rod 34 moves, it pushes the tooth plate 32 to move through the connecting rod 39. When the tooth plate 32 moves, it pushes the circular groove ring 30 to rotate at the bottom of the detection frame 1 through the meshing ring 38. When the circular groove ring 30 rotates, it drives the mixing plate 31 to rotate. The mixing plate 31 is used to stir the concrete flow to avoid gas storage in the concrete to generate bubbles, which affects the detection result of concrete penetration. There are two connecting rods 39, and the two connecting rods 39 are oppositely arranged. The end of the slide rod frame 35 extends to the outer end of the round hole rod 34.

[0036] The vibration component 10 includes a positioning ring 40, the inner wall of the positioning ring 40 is fixedly connected to the inner wall of the detection frame 2, the surface of the positioning ring 40 is fixedly connected to a groove plate 41, the surface of the linkage rod 39 is fixedly connected to a connecting rod 42, the surface of the connecting rod 42 is fixedly connected to a spring piece 43, and the end of the spring piece 43 away from the connecting rod 42 is fixedly connected to a triangular block 44.

[0037] The positioning ring 40 is located above the limit ring 36. When the linkage rod 39 of the present invention moves, it pushes the spring sheet 43 to move through the connecting rod 42. When the spring sheet 43 moves, it drives the triangular block 44 to move on the surface of the groove plate 41. The triangular block 44 can extend to the inside of the groove of the groove plate 41 by the elasticity of the spring sheet 43, and when moving, as the groove plate 41 continuously contracts and extends, when the triangular block 44 contacts the inner wall of the groove of the groove plate 41, it will vibrate. The vibration will be transmitted to the detection frame 2 through the positioning ring 40. The gas in the concrete can be quickly discharged by the vibration to avoid the gas gathering inside the concrete and affecting the penetration detection result. The surface of the triangular block 44 contacts the inner wall of the groove plate 41. Two spring sheets 43 are arranged on the surface of the triangular block 44, and the two spring sheets 43 are symmetrically arranged with the triangular block 44 as the center.

[0038] When in use, when concrete needs to be added to the interior of the detection frame 1, the electric push rod 29 is started to push the center frame 20 to move upward, and the center frame 20 slides on the surface of the round rod 21. The round rod 21 is used to limit the center frame 20 to improve the stability of the center frame 20 when moving. When the center frame 20 moves, the disc 24 in the detection frame 1 is pushed upward by the bent plate 28. At this time, the disc 24 in the detection frame 22 will also move upward with the bent plate 28. When the disc 24 is separated from the inner wall of the detection frame 1, concrete can be added to the interior of the detection frame 1 and the detection frame 22 for penetration testing. At this time, the disc 24 is started. Enter the interior of the detection frame 1 to seal the detection frame 1, start the water supply device 4 to push the water flow to the inside of the hose 5, the water flow enters the inner wall of the cylindrical tube 25 through the hose 5 and gathers on the surface of the concrete through the sieve frame 26, the water flow that penetrates through the concrete will enter the inside of the graduated tube 6 through the cylindrical tube 25, the staff can observe the height of the water flow entering the graduated tube 6 to detect the permeability of the concrete, when it is necessary to unload the concrete inside the detection frame 22, start the center frame 20 to push the bent plate 28 to move downward, and the bent plate 28 will push the disc 24 in the detection frame 22 to move upward when moving. The center frame 20 pushes the tripod 33 to deform through the extrusion ring 37 when moving, and the tripod 33 pushes the round hole rod 34 to slide on the surface of the sliding rod frame 35 when expanding. The round hole rod 34 pushes the tooth plate 32 to move through the linkage rod 39 when moving, and the tooth plate 32 pushes the circular groove ring 30 to rotate at the bottom of the detection frame 1 through the meshing ring 38 when moving. The circular groove ring 30 drives the mixing plate 31 to rotate when rotating, and the mixing plate 31 is used to stir the concrete flow to avoid gas storage inside the concrete. Bubbles are generated, which affect the detection result of concrete penetration. When the connecting rod 39 moves, it pushes the spring piece 43 to move through the connecting rod 42. When the spring piece 43 moves, it drives the triangular block 44 to move on the surface of the groove plate 41. The triangular block 44 can extend to the inside of the groove of the groove plate 41 by the elasticity of the spring piece 43, and as the groove plate 41 continues to shrink and extend during movement, when the triangular block 44 contacts the inner wall of the groove of the groove plate 41, vibration will be generated. The vibration will be transmitted to the detection frame 22 through the positioning ring 40. The gas in the concrete can be quickly discharged through the vibration to avoid the gas gathering inside the concrete and affecting the penetration detection result.

[0039] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A penetration testing device for asphalt concrete specimens, comprising a testing frame (1), characterized in that: A detection frame 2 (2) is arranged below the detection frame 1 (1), a hose (5) is arranged on the top of the detection frame 1 (1), and the end of the hose (5) away from the detection frame 1 (1) is connected to a water supply device (4), the lower surface of the detection frame 2 (2) is fixedly connected to a support rod (3), a detection component (8) is arranged on the surface of the detection frame 1 (1), an exhaust component (9) is arranged at the end of the detection frame 1 (1) and the detection frame 2 (2) close to each other, and a vibration component (10) is arranged on the surface of the exhaust component (9), and a graduated tube (6) is arranged at the bottom of the detection frame 2 (2), and the bottom of the graduated tube (6) is connected to a discharge valve (7); The detection component (8) comprises a round rod (21), the surface of the round rod (21) is fixedly connected to a fixing frame (23), the number of the fixing frames (23) is two, the ends of the two fixing frames (23) close to each other are respectively fixedly connected to a detection frame 1 (1) and a detection frame 2 (2), the surface of the round rod (21) is fixedly connected to a center frame (20), the surface of the center frame (20) is fixedly connected to an electric push rod (29), the bottom of the electric push rod (29) is connected to the fixing frame (2 3), the surface of the center frame (20) is fixedly connected with a bent plate (28), one end of the bent plate (28) away from the center frame (20) is fixedly connected with a disc (24), the surface of the disc (24) is connected with a cylindrical tube (25), the surface of the disc (24) is fixedly connected with a sealing gasket (22), the end of the disc (24) away from the bent plate (28) is fixedly connected with a sieve frame (26), and the surface of the sieve frame (26) is fixedly connected with a conical frame (27).

2. The asphalt concrete specimen penetration detection device according to claim 1, characterized in that: The end of the round rod (21) passes through the fixing frame (23) and extends to the outer end of the fixing frame (23); the electric push rod (29) is located at an end of the central frame (20) away from the detection frame one (1); the surface of the sealing gasket (22) contacts the inner wall of the detection frame one (1); and the number of the discs (24) is two, and the two discs (24) are symmetrically arranged with the central frame (20) as the center.

3. The asphalt concrete specimen penetration detection device according to claim 2, characterized in that: One end of the cone frame (27) away from the sieve frame (26) is inclined toward the surface of the sealing pad (22); one end of the hose (5) away from the water supply device (4) is plugged into the inner wall of the cylindrical tube (25); the top of the graduated tube (6) is fixedly connected to the bottom of the disc (24), and is communicated with the second detection frame (2) through the cylindrical tube (25).

4. The asphalt concrete specimen penetration detection device according to claim 3, characterized in that: The exhaust component (9) comprises a circular groove ring (30), the circular groove ring (30) being arranged at one end of the detection frame 1 (1) and the detection frame 2 (2) being close to each other, the one end of the detection frame 1 (1) and the detection frame 2 (2) being close to each other being rotatably connected to the inner wall of the circular groove ring (30), the end of the central frame (20) being fixedly connected to an extrusion ring (37), the bottom of the extrusion ring (37) being hinged to a tripod (33), the bottom of the tripod (33) being hinged to a round hole rod (34), the detection frame 2 (2 ... A limit ring (36) is fixedly connected to the surface, a slide rod frame (35) is fixedly connected to the surface of the limit ring (36), an engagement ring (38) is fixedly connected to the surface of the circular groove ring (30), a tooth plate (32) is meshed on the surface of the engagement ring (38), a connecting rod (39) is fixedly connected to the surface of the tooth plate (32), an end of the connecting rod (39) away from the tooth plate (32) is fixedly connected to the end of the circular hole rod (34), and a mixing plate (31) is fixedly connected to the inner wall of the circular groove ring (30).

5. The asphalt concrete specimen penetration detection device according to claim 4, characterized in that: The inner wall of the round hole rod (34) is slidably connected to the surface of the slide rod frame (35), the number of the connecting rods (39) is two, the two connecting rods (39) are arranged oppositely, and the end of the slide rod frame (35) extends to the outer end of the round hole rod (34).

6. The asphalt concrete specimen penetration detection device according to claim 5, characterized in that: The vibration component (10) comprises a positioning ring (40), the inner wall of the positioning ring (40) is fixedly connected to the inner wall of the second detection frame (2), the surface of the positioning ring (40) is fixedly connected to a groove plate (41), the surface of the linkage rod (39) is fixedly connected to a connecting rod (42), the surface of the connecting rod (42) is fixedly connected to a spring sheet (43), and one end of the spring sheet (43) away from the connecting rod (42) is fixedly connected to a triangular block (44).

7. A penetration detection device for asphalt concrete specimen according to claim 6, characterized in that: The positioning ring (40) is located above the limiting ring (36), the surface of the triangular block (44) contacts the inner wall of the groove plate (41), and two spring sheets (43) are arranged on the surface of the triangular block (44), and the two spring sheets (43) are symmetrically arranged with the triangular block (44) as the center.

Images