Detection device for testing permeability of asphalt concrete test piece

Abstract

The invention relates to the field of asphalt concrete permeability testing, particularly discloses a detection device for testing the permeability of an asphalt concrete test piece, and aims to solve the problems of poor sealing effect, low efficiency and relatively large testing error when the conventional asphalt concrete test piece is subjected to permeability testing. The device comprises a test frame, a test cylinder, a first telescopic piece, a tray, a test piece, a second telescopic piece, a ring seat, a ring table, a fixed ring, an annular rubber sleeve, a sliding ring, an inclined block, a sliding seat and a driving assembly, a plurality of pressing strips located on the outer side of the annular rubber sleeve are arranged on the fixed ring in an array sliding mode, and a first linkage assembly is arranged on the fixed ring; the first linkage assembly is used for driving the pressing strip to be tightly pressed against the outer side face of the annular rubber sleeve when the sliding base slides towards the test piece, and a cleaning assembly is further arranged on the annular base and used for cleaning the outer side face of the test piece. The device has the characteristics of convenience in test piece sealing, good sealing effect and high test operation efficiency and precision.

Description

Technical Field

[0001] The invention relates to the field of asphalt concrete permeability testing, in particular to a detection device for asphalt concrete specimen permeability testing. Background Art

[0002] The impermeability of asphalt concrete is one of its important durability indicators, especially in scenarios such as pavements, bridge decks, and water conservancy projects. Impermeability directly affects the service life of the structure (such as preventing freeze-thaw damage caused by water penetration and softening of the base layer).

[0003] However, in actual experiments, existing asphalt or concrete specimens are generally not easy to seal and the sealing operation is avoided. In addition, since the specimens are generally pressed into the test tube to ensure sealing, it is not convenient to remove the specimens from the test tube after the experiment.

[0004] The permeability testing device and method for permeability of permeable asphalt concrete with publication number CN112067529A discloses "a permeability testing device and method for permeability of permeable asphalt concrete, the permeability testing device comprising a first measuring cylinder and a second measuring cylinder vertically arranged in the middle of the first measuring cylinder; a permeability cylinder body is provided above the second measuring cylinder, a permeable asphalt concrete specimen (PAC specimen) is clamped between the second measuring cylinder and the permeability cylinder body, the diameters of the second measuring cylinder, the permeability cylinder body and the PAC specimen are consistent and coaxially sealed, and the top of the permeability cylinder body is connected to a water inlet pipe. The simultaneous measurement of the vertical and lateral permeability of the permeable asphalt concrete is achieved."

[0005] Although the above technical solution can detect the horizontal and vertical permeability of the specimen, it is still inconvenient to perform flexible sealing operation on the specimen during the vertical permeability test. Therefore, a detection device for testing the permeability of asphalt concrete specimens is proposed. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology, the present invention proposes a detection device for asphalt concrete specimen permeability testing, which can facilitate the sealing of the specimen, improve the effect and accuracy of permeability testing, is easy to operate, and can also improve the efficiency of the test experiment.

[0007] In order to solve the above technical problems, the basic technical solutions proposed by the present invention are: A detection device for testing the permeability of an asphalt concrete specimen comprises a test frame, a test cylinder mounted on the bottom of the test frame, a telescopic member 1 mounted on the bottom of the test cylinder, a tray connected to the upper output end of the telescopic member 1, and a test specimen supported by the tray, a telescopic member 2 mounted on the bottom of the test frame, a ring seat connected to the lower output end of the telescopic member 2, a ring platform sleeved on the outer edge of the upper end of the test cylinder, a fixed ring connected to the bottom of the test cylinder, an annular rubber sleeve sleeved on the fixed ring, and a slip ring sleeved on the upper end of the annular rubber sleeve that slides in the test cylinder, the upper end surface of the slip ring being connected to an array of inclined blocks located above the ring platform; The ring platform is provided with a plurality of slides for sliding in an array, and the slides slide in contact with the corresponding inclined blocks. The ring seat is provided with a driving assembly, and the driving assembly is used to drive the plurality of slides for sliding in an array on the ring platform to slide synchronously close to each other. The fixed ring is provided with a plurality of pressure strips on the outside of the annular rubber cylinder for sliding in an array, and the fixed ring is provided with a linkage assembly 1, and the linkage assembly 1 is used to drive the pressure strips to press against the outer side surface of the annular rubber cylinder when the slide slides toward the specimen. A cleaning assembly is also provided on the ring seat, and the cleaning assembly is used to clean the outer side surface of the specimen.

[0008] Preferably, a water inlet pressure valve is installed at the bottom of the test cylinder, a data monitoring and analysis module is installed at the top of the test frame, and a supporting ring is also installed at the bottom of the test cylinder. The diameter of the supporting ring is larger than the tray and is fitted on the outside of the tray.

[0009] Preferably, multiple groups of sliding rod frames are installed in a radial array on the upper edge of the ring table, and each group of sliding rod frames is set as two. A sleeve is slidably sleeved on the outer side of each sliding rod frame. The two sides of the sliding seat are respectively connected to the sleeves slidably sleeved on the sliding rod frames on both sides of each group. The sleeve and the sliding rod frame are also connected to a spring sleeve sleeved on the outer side of the sliding rod frame at one end close to the center of the test cylinder.

[0010] Preferably, the driving assembly includes a bracket, a rotating plate, and a limiting inclined seat. The bracket array is connected to the outside of the ring seat, and each bracket is directly above the corresponding side sliding seat. The limiting inclined seat is connected to the lower end of the bracket. The rotating plate is rotatably connected to the lower end of the bracket through a spring hinge, and is in contact with the inclined surface of the limiting inclined seat for limiting position. The lower end of the rotating plate slides and fits in contact with the upper end surface of the ring table, and the lower end of the rotating plate also fits and contacts with the side of the slide away from the center of the test cylinder.

[0011] Preferably, the linkage assembly includes a connecting block, a push plate, a sliding rod, and a limit plate. The upper end of the connecting block is connected to a side of the slide seat close to the test piece, and the lower end of the connecting block passes through the slip ring and extends between the fixed ring and the slip ring. The push plate is connected to the extending end on the lower side of the connecting block and slides between the outer side of the annular rubber cylinder and the inner wall of the test cylinder. The sliding rod is arranged in multiple groups, each group is composed of two upper and lower sliding rods, the sliding rod passes through the sliding sleeve in the push plate, and the upper and lower ends of the pressure strip are respectively connected to one end of the upper and lower side sliding rods close to the annular rubber cylinder, the limit plate is arranged on the side of the push plate away from the annular rubber cylinder, and is connected to one end of the sliding rod away from the annular rubber cylinder, and a spring 2 is connected between the pressure strip and the push plate. The spring is sleeved on the outside of the sliding rod.

[0012] Preferably, an opening is provided on the fixing ring and the inclined block, the upper end of the connecting block passes through the fixing ring and the inclined block through the opening, and both sides of the sliding seat respectively slide and fit with the inclined surfaces of the inclined block along both sides of the opening.

[0013] Preferably, the fixing ring is connected to a frame, and the frame is arranged in an array and is arranged on both sides of each opening. The frame is connected to a guide rod, and the two sides of the push plate are also slidably sleeved on the outside of the guide rod connected to the frames on both sides.

[0014] Preferably, the cleaning assembly includes a swivel and a cleaning ring brush. The swivel is rotatably sleeved on the inner wall of the ring seat through a bearing. The cleaning ring brush is sleeved on the inner wall of the swivel. The cleaning ring brush is fitted on the outside of the specimen. A linkage assembly 2 is also provided on the ring seat. The linkage assembly 2 is used to drive the swivel to rotate when the ring seat is driven upward by the telescopic part 2, so as to drive the cleaning ring brush to clean the outer surface of the specimen.

[0015] Preferably, the second linkage component includes a worm wheel, a worm, a gear, a second slide rod frame, a slide frame, and a rack. The worm wheel is mounted on the outside of the rotating ring, and the worm is rotatably mounted on both sides of the upper end surface of the ring seat and meshes with the worm wheel. The gear is mounted on both ends of each worm, and the second slide rod frame is connected to both sides of the upper end surface of the ring seat. The slide frame is slidably mounted on the outside of the second slide rod frame, and the rack is connected to the slide frame and meshes with the corresponding gears. A spring three mounted on the outside of the second slide rod frame is also connected between the slide frame and the ring seat, and the upper end of the slide frame matches and conflicts with the upper end of the test frame.

[0016] Preferably, a through hole is provided on the ring seat, and the lower end of the sliding frame extends through the through hole to the bottom of the ring seat, and a sleeve plate is connected to the lower extension end. Guide rods 2 are also connected on both sides of the lower end surface of the ring seat, and the sleeve plate is slidably sleeved on the outside of guide rod 2. Extension blocks are connected on both sides of the top of the test frame, and the lower end surface of the extension block abuts against the upper end of the sliding frame to limit the position.

[0017] The beneficial effects of the present invention are: 1. The technical solution of the present invention is to drive the telescopic member 1 to extend, thereby lifting the tray above the test cylinder, and then place the asphalt or concrete test piece on the tray, and then drive the retractable telescopic member 1 to drive the tray to move down to the supporting ring at the bottom of the test cylinder. At the same time, the tray is in the supporting ring, so that the test piece is supported only by the supporting ring, and then the telescopic member 2 can be controlled to drive the ring seat to move down, so that each bracket drives the rotating plate to move down. As the downward movement proceeds, the rotating plate will slide against the upper end surface of the ring table and overcome the elastic force of the spring hinge, gradually rotating from an inclined state to a horizontal state. In the process, it will also push each slide to move closer to each other, and through the resistance of the slide to the inclined block, the sliding ring is pushed down and the annular rubber cylinder is squeezed, so that the inner wall of the annular rubber cylinder is compressed and fits and seals with the side surface of the test cylinder supported by the supporting ring, and then water is injected into the test cylinder through the water inlet pressure valve and pressurized, and data is collected in real time and analyzed by the data monitoring and analysis module, so that the anti-permeability performance of the test piece can be tested; 2. The technical solution of the present invention drives the inner concave of the annular rubber sleeve to seal the outer side of the test piece through the interference between the sliding seat and the inclined block. The slider also drives the push plate to approach the outer side of the annular rubber sleeve through the connecting block, thereby driving the pressure strip to gradually fit and squeeze the outer side of the annular rubber sleeve. During this process, the pressure strip and the sliding rod will move relatively close to the push plate, so that the pressure strip can further squeeze the annular rubber sleeve sealed on the outside of the test piece, thereby further improving the sealing performance of the annular rubber sleeve and the test piece. 3. The technical solution of the present invention is to use the cleaning component and the driving component 2 so that before the test piece is sealed, the telescopic component 1 can be driven to extend and the test piece can be lifted above the cleaning ring brush. Then the telescopic component 2 can be driven to contract to drive the ring seat to move upward, which can drive the cleaning ring brush to move upward to clean the outer side of the test piece. In the process of the ring seat moving upward, the sliding frame and the test frame can also be used to interfere with each other, so that the rotating ring and the cleaning ring brush can be driven to rotate, so that the cleaning ring brush can not only clean the side of the test piece along the axial direction of the test piece, but also rotate during the process, thereby further improving the cleaning effect and ensuring the sealing effect of the subsequent sealing sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a cross-sectional view of the front view structure of the present invention; Figure 3 is a cross-sectional view of the side structure of the present invention; Figure 4 It is a schematic diagram of the structure of the test tube of the present invention; Figure 5 This is a schematic diagram of the internal structure of the test tube of the present invention; Figure 6It is a structural diagram of the linkage assembly of the present invention; Figure 7 Schematic diagram of the side structure of the linkage assembly of the present invention; Figure 8 This is a schematic structural diagram of the cleaning component and the driving component 2 of the present invention; Figure 9 This is a schematic structural diagram of the driving component 1 of the present invention.

[0019] Description of reference numerals: 1. Test stand; 2. Test tube; 3. Telescopic member 1; 4. Tray; 5. Test piece; 6. Telescopic member 2; 7. Ring seat; 8. Ring table; 9. Fixed ring; 10. Slip ring; 11. Annular rubber cylinder; 12. Inclined block; 13. Sliding rod frame 1; 14. Sleeve; 15. Spring 1; 16. Sliding seat; 17. Bracket; 18. Rotating plate; 19. Limit inclined seat; 20. Opening; 21. Frame; 22. Guide rod 1; 23. Push plate; 2 4. Connecting block; 25. Sliding rod; 26. Pressure strip; 27. Limiting plate 1; 28. Spring 2; 29. ​​Swivel; 30. Cleaning ring brush; 31. Worm gear; 32. Worm; 33. Gear; 34. Sliding rod frame 2; 35. Sliding frame; 36. Rack; 37. Spring 3; 38. Through hole; 39. Bushing; 40. Guide rod 2; 41. Water inlet pressure valve; 42. Data monitoring and analysis module; 43. Support ring; 44. Extension block. DETAILED DESCRIPTION

[0020] The following will be combined with the Figure 1 To the attached Figure 9 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention.

[0021] Example 1: like Figures 1-9 As shown, the present invention discloses a detection device for testing the permeability of an asphalt concrete specimen, comprising a test frame 1, a test cylinder 2 is installed at the bottom of the test frame 1, and a telescopic member 3 is installed at the bottom of the test cylinder 2, and the upper output end of the telescopic member 3 is connected to a tray 4, and a test specimen 5 is supported by the tray 4, a telescopic member 2 is installed at the bottom of the test frame 1, and the lower output end of the telescopic member 2 6 is connected to a ring seat 7, a ring platform 8 is sleeved on the outer edge of the upper end of the test cylinder 2, a fixed ring 9 is connected to the bottom of the test cylinder 2, an annular rubber sleeve 11 is sleeved on the fixed ring 9, and a slip ring 10 that slides in the test cylinder 2 is sleeved on the upper end of the annular rubber sleeve 11, and the upper end surface of the slip ring 10 is connected to an inclined block 12 above the ring platform 8. A plurality of slides 16 are provided on the ring table 8 for sliding in an array, and the slides 16 slide and fit into and contact with their respective corresponding inclined blocks 12. A driving assembly is provided on the ring seat 7, and the driving assembly is used to drive the plurality of slides 16 provided on the ring table 8 for sliding in an array to slide synchronously close to each other. A plurality of pressure strips 26 located on the outside of the annular rubber cylinder 11 are provided on the fixed ring 9 for sliding in an array, and a linkage assembly 1 is provided on the fixed ring 9. The linkage assembly 1 is used to drive the pressure strips 26 to press against the outer side surface of the annular rubber cylinder 11 when the slide 16 slides toward the specimen 5. A cleaning assembly is also provided on the ring seat 7, and the cleaning assembly is used to clean the outer side surface of the specimen 5.

[0022] A water inlet pressure valve 41 is installed at the bottom of the test cylinder 2, a data monitoring and analysis module 42 is installed on the top of the test frame 1, and a supporting ring 43 is also installed at the bottom of the test cylinder 2. The diameter of the supporting ring 43 is larger than the tray 4, and the supporting ring 43 is fitted on the outside of the tray 4. The setting of the supporting ring 43 can avoid the tray 4 with a larger cross-sectional area from blocking the lower end surface of the specimen 5 when supporting the specimen 5, thereby reducing the accuracy of the permeability test of the specimen 5. The data monitoring and analysis module 42 can be directly used with existing mature permeability data monitoring and analysis equipment.

[0023] A plurality of groups of slide rod frames 13 are installed in a radial array on the ring platform 8, and each group of slide rod frames 13 is set up with two. A sleeve 14 is slidably sleeved on the outside of each slide rod frame 13. The two sides of the slide seat 16 are respectively connected to the sleeves 14 slidably sleeved on the slide rod frames 13 on both sides of each group. The sleeve 14 is further connected to the end of the slide rod frame 13 near the center of the test cylinder 2, and a spring 15 sleeved on the outside of the slide rod frame 13 is connected.

[0024] The sliding seat 16 is mounted on the outside of the slide rod frame 13 through the sleeves 14 connected on both sides, which can stabilize its sliding. At the same time, the setting of the spring 15 allows the sliding seat 16 to slide away from the inclined block 12 without external force, and does not generate any force on the inclined block 12.

[0025] Example 2: like Figures 1-9 As shown, the present invention discloses a detection device for testing the permeability of asphalt concrete specimens. Compared with the first embodiment, this embodiment discloses the structure of a driving component.

[0026] The driving assembly includes a bracket 17, a rotating plate 18, and a limiting inclined seat 19. The bracket 17 is connected in an array to the outside of the ring seat 7, and each bracket 17 is directly above the corresponding side sliding seat 16. The limiting inclined seat 19 is connected to the lower end of the bracket 17. The rotating plate 18 is rotatably connected to the lower end of the bracket 17 through a spring hinge, and is in contact with the inclined surface of the limiting inclined seat 19 to limit the position. The lower end of the rotating plate 18 slides and fits with the upper end surface of the ring stage 8, and the lower end of the rotating plate 18 also cooperates and contacts with the side of the slide 16 away from the center of the test cylinder 2.

[0027] During use, the telescopic member 1 is driven to extend, and the tray 4 is lifted above the test cylinder 2. Then, the asphalt or concrete test piece 5 is placed on the tray 4. Then, the telescopic member 1 is driven to retract, so that the tray 4 moves the test piece 5 down to the supporting ring 43 at the bottom of the test cylinder 2. At the same time, the tray 4 is inside the supporting ring 43, and the test piece 5 is supported only by the supporting ring 43, so that the tray 4 with a larger cross-sectional area does not hinder the permeability of the lower end surface of the test piece 5, thereby reducing the test accuracy. By driving the ring seat 7 downward through the telescopic member 2 6, the rotating plate 18, which is limited by the limited inclined seat 19 in an inclined state, can be driven to gradually move downward and contact with the upper end surface of the ring platform 8, gradually rotating from an inclined state to a horizontal state. During the process, it can contact the slide seat 16, so that each slide seat 16 slides close to each other to produce a conflict with the inclined block 12, and then push the slip ring 10 to slide downward in the test cylinder 2, compressing the annular rubber sleeve 11, so that the annular rubber sleeve 11 is concave to seal the test piece 5 on the supporting ring 43 in the test cylinder 2.

[0028] Example 3: like Figures 1-9 As shown, the present invention discloses a detection device for testing the permeability of asphalt concrete specimens. Compared with the second embodiment, this embodiment discloses the structure of the linkage component one.

[0029] The linkage assembly 1 includes a connecting block 24, a push plate 23, a sliding rod 25, and a limit plate 1 27. The upper end of the connecting block 24 is connected to the side of the slide 16 close to the test piece 5, and the lower end of the connecting block 24 passes through the slip ring 10 and extends between the fixed ring 9 and the slip ring 10. The push plate 23 is connected to the extended end of the lower side of the connecting block 24 and slides between the outer side of the annular rubber cylinder 11 and the inner wall of the test cylinder 2. The sliding rod 25 is arranged in multiple groups, each group consisting of two upper and lower sliding rods 25. The sliding rod 25 passes through the sliding sleeve in the push plate 23, and the upper and lower ends of the pressure strip 26 are respectively connected to one end of the upper and lower side sliding rods 25 close to the annular rubber cylinder 11. The limit plate 1 27 is arranged on the side of the push plate 23 away from the annular rubber cylinder 11 and is connected to the end of the sliding rod 25 away from the annular rubber cylinder 11. A spring 28 arranged on the outside of the sliding rod 25 is connected between the pressure strip 26 and the push plate 23.

[0030] An opening 20 is provided on the fixing ring 9 and the inclined block 12. The upper end of the connecting block 24 passes through the fixing ring 9 and the inclined block 12 through the opening 20. The two sides of the slide 16 slide and fit in contact with the inclined surfaces of the inclined block 12 along the two sides of the opening 20. The setting of the opening 20 facilitates the connection between the push plate 23 and the slide 16.

[0031] A frame 21 is connected to the fixed ring 9, and the frame 21 is arranged in an array and is arranged on both sides of each opening 20. A guide rod 22 is connected to the frame 21, and both sides of the push plate 23 are also slidably sleeved on the outside of the guide rod 22 connected to the frame 21 on both sides. The sliding sleeve of the push plate 23 on the outside of the guide rod 22 can stabilize its sliding.

[0032] In the process of driving the concave portion of the annular rubber sleeve 11 to seal against the outer side surface of the test piece 5 through the contact between the slide 16 and the inclined block 12, the slide 16 will also drive the push plate 23 to approach the outer side surface of the annular rubber sleeve 11 through the connecting block 24, thereby driving the pressure strip 26 to gradually fit and extrude against the outer side surface of the annular rubber sleeve 11. During this process, the pressure strip 26 and the slide rod 25 will relatively move toward the push plate 23, so that the annular rubber sleeve 11 sealed on the outside of the test piece 5 can be further squeezed by the pressure strip 26, thereby further improving the sealing performance of the annular rubber sleeve 11 and the test piece 5.

[0033] Example 4: like Figures 1-9 As shown, the present invention discloses a detection device for testing the permeability of asphalt concrete specimens. Compared with the third embodiment, this embodiment discloses the structure of a cleaning component.

[0034] The cleaning assembly includes a swivel 29 and a cleaning ring brush 30. The swivel 29 is rotatably sleeved on the inner wall of the ring seat 7 through a bearing. The cleaning ring brush 30 is sleeved on the inner wall of the swivel 29. The cleaning ring brush 30 is cooperatively sleeved on the outside of the specimen 5. A linkage assembly 2 is also provided on the ring seat 7. The linkage assembly 2 is used to drive the swivel 29 to rotate when the ring seat 7 is driven upward by the telescopic part 2 6, so as to drive the cleaning ring brush 30 to clean the outer surface of the specimen 5.

[0035] Before the test piece 5 is sealed, the telescopic part 1 3 can be driven to extend to lift the test piece 5 above the cleaning ring brush 30, and then the telescopic part 2 6 can be driven to contract to drive the ring seat 7 to move upward, thereby driving the cleaning ring brush 30 to move upward to clean the outer surface of the test piece 5.

[0036] Embodiment 5: like Figures 1-9 As shown, the present invention discloses a detection device for testing the permeability of asphalt concrete specimens. Compared with the fourth embodiment, this embodiment discloses the structure of the linkage component 2.

[0037] The linkage component II includes a worm wheel 31, a worm 32, a gear 33, a slide rod frame II 34, a slide frame 35, and a rack 36. The worm wheel 31 is mounted on the outside of the rotating ring 29, and the worm 32 is rotatably mounted on both sides of the upper end surface of the ring seat 7 and meshes with the worm wheel 31. Gears 33 are mounted on both ends of each worm 32. The slide rod frame II 34 is connected to both sides of the upper end surface of the ring seat 7, and the slide frame 35 is slidably mounted on the outside of the slide rod frame II 34. The rack 36 is connected to the slide frame 35 and meshes with the corresponding gears 33. A spring three 37 mounted on the outside of the slide rod frame II 34 is also connected between the slide frame 35 and the ring seat 7. The upper end of the slide frame 35 matches and contacts the upper end of the test frame 1.

[0038] A through hole 38 is provided on the ring seat 7, and the lower end of the slide frame 35 extends through the through hole 38 to the bottom of the ring seat 7, and is connected to a sleeve plate 39 at the lower extension end. Guide rods 2 40 are also connected on both sides of the lower end surface of the ring seat 7. The sleeve plate 39 is slidably sleeved on the outer side of the guide rods 2 40. Extension blocks 44 are connected on both sides of the top of the test frame 1, and the lower end surface of the extension block 44 abuts against the upper end of the slide frame 35 to limit the position.

[0039] During the upward movement of the ring seat 7, the rack 36 can be driven to move downward relative to the ring seat 7 through the interference between the sliding frame 35 and the extension block 44 on the test frame 1, and the rotating ring 29 and the cleaning ring brush 30 can be driven to rotate through the engagement of the rack 36 and the gear 33, so that the cleaning ring brush 30 can not only clean the side of the test piece 5 along the axial direction of the test piece 5, but also rotate in the process, thereby further improving the cleaning effect and ensuring the sealing effect of the subsequent sealing sleeve.

[0040] Based on the disclosure and teachings of the above description, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although certain specific terms are used in this description, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A detection device for testing the permeability of an asphalt concrete specimen, comprising a test frame (1), a test tube (2) being mounted on the bottom of the test frame (1), a telescopic member (3) being mounted on the bottom of the test tube (2), a tray (4) being connected to the upper output end of the telescopic member (3), and a specimen (5) being supported by the tray (4), a telescopic member (6) being mounted on the bottom of the test frame (1), and a ring seat (7) being connected to the lower output end of the telescopic member (6), and characterized in that: The outer edge of the upper end of the test cylinder (2) is provided with a ring platform (8), the bottom of the test cylinder (2) is connected to a fixed ring (9), an annular rubber cylinder (11) is provided on the fixed ring (9), and the upper end of the annular rubber cylinder (11) is provided with a slip ring (10) that slides in the test cylinder (2), and the upper end surface array of the slip ring (10) is connected to an inclined block (12) located above the ring platform (8); The ring table (8) is provided with a plurality of slides (16) for sliding in an array, and the slides (16) are in sliding contact with the corresponding inclined blocks (12). The ring seat (7) is provided with a driving component, and the driving component is used to drive the plurality of slides (16) for sliding in an array on the ring table (8) to slide synchronously toward each other. The fixed ring (9) is provided with a plurality of pressure strips (26) on the outside of the annular rubber cylinder (11) for sliding in an array, and the fixed ring (9) is provided with a linkage component 1, and the linkage component 1 is used to drive the pressure strips (26) to press against the outer side surface of the annular rubber cylinder (11) when the slide (16) slides toward the test piece (5). The ring seat (7) is also provided with a cleaning component, and the cleaning component is used to clean the outer side surface of the test piece (5).

2. The asphalt concrete specimen permeability testing device according to claim 1, characterized in that: A water inlet pressure valve (41) is installed at the bottom of the test cylinder (2), a data monitoring and analysis module (42) is installed at the top of the test frame (1), and a supporting ring (43) is also installed at the bottom of the test cylinder (2). The supporting ring (43) has a diameter larger than the tray (4) and is fitted on the outside of the tray (4).

3. The asphalt concrete specimen permeability testing device according to claim 1, characterized in that: A plurality of groups of slide rod frames (13) are installed in a radial array on the ring platform (8), and each group of the slide rod frames (13) is set as two. A sleeve (14) is slidably sleeved on the outer side of each slide rod frame (13). Both sides of the slide seat (16) are respectively connected to the sleeves (14) slidably sleeved on the slide rod frames (13) on both sides of each group. The sleeve (14) is also connected to the end of the slide rod frame (13) close to the center of the test tube (2) with a spring (15) sleeved on the outer side of the slide rod frame (13).

4. The asphalt concrete specimen permeability testing device according to claim 1, characterized in that: The driving assembly includes a bracket (17), a rotating plate (18), and a limiting inclined seat (19). The bracket (17) is connected in array to the outside of the ring seat (7), and each bracket (17) is located directly above the corresponding side sliding seat (16). The limiting inclined seat (19) is connected to the lower end of the bracket (17). The rotating plate (18) is rotatably connected to the lower end of the bracket (17) through a spring hinge and is in contact with the inclined surface of the limiting inclined seat (19) for limiting position. The lower end of the rotating plate (18) is in sliding contact with the upper end surface of the ring table (8), and the lower end of the rotating plate (18) is also in contact with the side of the slide seat (16) away from the center of the test cylinder (2).

5. The asphalt concrete specimen permeability testing device according to claim 1, characterized in that: The linkage assembly 1 includes a connecting block (24), a push plate (23), a slide rod (25), and a limit plate 1 (27). The upper end of the connecting block (24) is connected to the side of the slide seat (16) close to the test piece (5), and the lower end of the connecting block (24) passes through the slip ring (10) and extends between the fixed ring (9) and the slip ring (10). The push plate (23) is connected to the extended end of the lower side of the connecting block (24) and slides between the outer side of the annular rubber cylinder (11) and the inner wall of the test cylinder (2). The slide rod (25) is provided in multiple groups, each The group is composed of two upper and lower sliding rods (25), the sliding rod (25) passes through the sliding sleeve in the push plate (23), and the upper and lower ends of the pressure strip (26) are respectively connected to one end of the upper and lower side sliding rods (25) close to the annular rubber cylinder (11), the limit plate (27) is set on the side of the push plate (23) away from the annular rubber cylinder (11), and is connected to the end of the sliding rod (25) away from the annular rubber cylinder (11), and a spring (28) is connected between the pressure strip (26) and the push plate (23) and is sleeved on the outside of the sliding rod (25).

6. The asphalt concrete specimen permeability testing device according to claim 5, characterized in that: An opening (20) is provided on the fixing ring (9) and the inclined block (12), and the upper end of the connecting block (24) passes through the fixing ring (9) and the inclined block (12) through the opening (20). Both sides of the sliding seat (16) are respectively slidably fitted and abutted against the inclined surfaces of the inclined block (12) along both sides of the opening (20).

7. The asphalt concrete specimen permeability testing device according to claim 5, characterized in that: The fixing ring (9) is connected to a frame (21), and the frame (21) is arranged in an array and is arranged on both sides of each opening (20). The frame (21) is connected to a guide rod (22), and both sides of the push plate (23) are also slidably sleeved on the outside of the guide rod (22) connected to the frame (21) on both sides.

8. The asphalt concrete specimen permeability testing device according to claim 1, characterized in that: The cleaning assembly comprises a rotating ring (29) and a cleaning ring brush (30). The rotating ring (29) is rotatably sleeved on the inner wall of the ring seat (7) through a bearing. The cleaning ring brush (30) is sleeved on the inner wall of the rotating ring (29). The cleaning ring brush (30) is sleeved on the outer side of the test piece (5). A linkage assembly 2 is also provided on the ring seat (7). The linkage assembly 2 is used to drive the rotating ring (29) to rotate when the ring seat (7) is driven upward by the telescopic member 2 (6), so as to drive the cleaning ring brush (30) to clean the outer side surface of the test piece (5).

9. The asphalt concrete specimen permeability testing device according to claim 8, characterized in that: The linkage assembly 2 includes a worm wheel (31), a worm (32), a gear (33), a slide frame 2 (34), a slide frame (35), and a rack (36). The worm wheel (31) is mounted on the outside of the rotating ring (29). The worm (32) is rotatably mounted on both sides of the upper end surface of the ring seat (7) and meshes with the worm wheel (31). The gear (33) is mounted on both ends of each worm (32). The slide frame 2 (34) is connected to both sides of the upper end surface of the ring seat (7). The slide frame (35) is slidably mounted on the outside of the slide frame 2 (34). The rack (36) is connected to the slide frame (35) and meshes with the corresponding gear (33). A spring 3 (37) mounted on the outside of the slide frame 2 (34) is also connected between the slide frame (35) and the ring seat (7). The upper end of the slide frame (35) is matched with and abuts against the upper end of the test frame (1).

10. The asphalt concrete specimen permeability testing device according to claim 9, characterized in that: A through hole (38) is provided on the ring seat (7), and the lower end of the slide frame (35) extends through the through hole (38) to the bottom of the ring seat (7), and is connected to a sleeve plate (39) at the lower extension end. The two sides of the lower end surface of the ring seat (7) are also connected to the guide rod 2 (40), and the sleeve plate (39) is slidably sleeved on the outside of the guide rod 2 (40). Extension blocks (44) are connected to both sides of the top of the test frame (1), and the lower end surface of the extension block (44) is in contact with the upper end of the slide frame (35) to limit the position.

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