A device for detecting the water permeability of a road surface and a method for detecting the water permeability of a road surface

Abstract

This invention discloses a road surface permeability testing device and method, comprising a convex support frame and a height adjustment mechanism, wherein the height adjustment mechanism is disposed on the top of the convex support frame. This invention relates to the field of road surface permeability testing technology. The road surface permeability testing device and method, by incorporating a self-sealing bonding mechanism, a pre-cleaning mechanism, and a shielding mechanism between the convex support frame, the base cover, and the transparent plastic measuring cup, enables the device to self-bond to the ground through the coordinated operation of these mechanisms. Simultaneously, the testing ground is cleaned during the bonding process. Furthermore, during the bonding process, sealing mud is simultaneously applied between the base cover and the inner conical ring seat, and the sealing mud is twisted and flattened, making it easy to mold and fit the device, filling the space between the inner conical ring seat, the base cover, and the ground to form a rapid seal.

Description

Technical Field

[0001] This invention relates to the field of pavement permeability testing technology, specifically to a pavement permeability performance testing device and its testing method. Background Technology

[0002] In the field of road construction, in order to avoid damage to the internal structure of the road surface caused by rainwater infiltration, it is necessary to conduct water seepage tests on the road surface after construction in order to detect water seepage problems in a timely manner and carry out repairs.

[0003] Water seepage detection often uses a graduated cylinder that combines a transparent measuring cup and a base for water seepage measurement. Before water seepage measurement, in order to ensure the sealing between the device and the ground, the existing technology will draw the outline of the base on the ground with chalk, and use a trowel to apply a certain thickness of sealant (such as putty) within the outline, flatten it, and make the base seal and adhere to the sealant by gravity.

[0004] In the existing technology, the device adopts a sealing mud sealing method, which can improve the sealing performance of the device in detecting water seepage. However, it still has shortcomings in actual use. The above-mentioned manual repeated application, flattening and shaping to seal the gap between the sealing mud, the device and the ground is complicated and labor-intensive, resulting in a time-consuming and labor-intensive problem during the sealing use of the device. Therefore, a road surface water seepage performance testing device and its testing method are proposed to solve the existing problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a road surface permeability testing device and its testing method, which solves the problem that the manual molding and sealing of the device with the sealing mud leads to a time-consuming and labor-intensive operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a road surface permeability testing device, comprising a convex support frame and a height adjustment mechanism. The height adjustment mechanism is located at the top of the convex support frame. A threaded shaft is rotatably connected to the top of the convex support frame via a bearing. An internally threaded grooved ring plate is threadedly connected to the surface of the threaded shaft. A bottom cover is slidably connected inside the internally threaded grooved ring plate. A transparent plastic measuring cup is connected to the top of the bottom cover. A self-sealing fitting mechanism is provided at the bottom of the bottom cover. A pre-cleaning mechanism is provided at the top of the convex support frame. A shielding mechanism is provided at the top of the convex support frame and behind the transparent plastic measuring cup.

[0007] Preferably, the self-sealing bonding mechanism includes two L-shaped plates, which are respectively fixedly disposed on the front and rear sides of the base cover. A hollow base plate is fixedly connected to the bottom of both L-shaped plates. An inner conical ring seat matching the base cover is fixedly connected inside the hollow base plate. An outer toothed ring plate is rotatably disposed on the top of the hollow base plate. An inner toothed ring cover is fixedly connected inside the outer toothed ring plate. A plurality of extrusion boxes are fixedly connected around the surface of the inner toothed ring cover at equal intervals via mounting grooves. The top of the extrusion boxes is secured by screws. A sealing plate is installed on the plug. A pressure block is slidably connected inside the extrusion box, and a push rod is fixedly connected to the surface of the pressure block. One end of the push rod extends to the outside of the extrusion box. A first electric telescopic rod is fixedly installed on the surface of the extrusion box, and the extended end of the first electric telescopic rod is fixedly connected to the surface of the push rod through a bracket. A servo motor is fixedly connected to the top of the hollow base plate. A first gear that meshes with an external gear ring plate is installed on the surface of the servo motor output shaft. A second gear that meshes with the first gear is slidably connected to the surface of the threaded shaft, and the bottom of the second gear... The unit is rotatably mounted on top of the hollow base plate via bearings and brackets. An outer gear sleeve is rotatably connected to the outer wall of the base plate, located inside the inner gear ring cover, via bearings. A vertical rod is rotatably connected to the bottom of the L-shaped plate's bend, and a third gear that meshes with the inner gear ring cover and outer gear sleeve is fixedly connected to the bottom of the vertical rod. An internally threaded cylinder is rotatably connected to the inside of the outer gear sleeve via an opening in the mounting groove. A threaded rod is threadedly connected to the inside of the internally threaded cylinder, with one end of the threaded rod extending to the bottom of the outer gear sleeve. A plastic pressure ring is fixedly connected to the end of the threaded rod extending to the bottom of the outer gear sleeve. The surface of the internally threaded cylinder is fixedly connected to a driven gear, and the surface of the bottom cover is fixedly connected to a main gear that meshes with the driven gear. Both sides of the bottom cover are fixedly connected to sliding groove frames, and sliding support plates are slidably connected inside the sliding groove frames. A first return spring is fixedly connected between the sliding support plates and the sliding groove frames. The opposite sides of the two sliding support plates are fixedly connected to both sides of the inner cavity of the internally threaded groove ring plate. Guide grooves are opened on both sides of the threaded shaft, and guide sliders that slide and adapt to the guide grooves are fixedly connected to both sides of the inner cavity of the second gear.

[0008] Preferably, the pre-cleaning mechanism includes a column, which is rotatably mounted on the top of a convex support frame. A horizontal column is rotatably connected to the top of the convex support frame via a bracket and a bearing. Meshing bevel gears are fixedly connected to the surfaces of both the horizontal column and the column. A fourth gear is fixedly connected to the surface of the horizontal column. A toothed plate that meshes with the fourth gear is fixedly connected to one side of the internally threaded groove ring plate via a bracket. The bottom end of the column extends to the bottom of the convex support frame. A brush plate is fixedly connected to the front side of the column and to the bottom of the convex support frame. A ratchet is fixedly connected to the surface of the column. A storage box is fixedly connected to the top of the convex support frame. A pawl that matches the ratchet is slidably connected inside the storage box, and a second return spring is fixedly connected between the pawl and the storage box.

[0009] Preferably, the shielding mechanism includes a receiving plate, and two receiving plates are provided, with the two receiving plates respectively fixedly installed on both sides of the transparent plastic measuring cup. A slide frame is slidably connected to the surface of the receiving plate, and a shielding plate is fixedly connected to the top of the slide frame. Guide slide frames are fixedly connected to both sides of the top of the convex support frame through brackets. A guide roller that matches the guide slide frame is rotatably connected to the rear side of the shielding plate through a bearing.

[0010] Preferably, the height adjustment mechanism includes a bending frame, and two bending frames are provided, with the two bending frames respectively fixedly installed on both sides of the top of the convex support frame. A second electric telescopic rod is fixedly connected to the bottom of the bending part of the bending frame, and a U-shaped frame is fixedly connected to the bottom of the extension end of the second electric telescopic rod. The bottom of the U-shaped frame extends to the bottom of the convex support frame, and pulleys are provided on the front and rear sides of the bottom of the U-shaped frame.

[0011] Preferably, the top of the lower convex support frame is provided with an annular groove, and an annular rotating plate is rotatably connected inside the annular groove. Several support columns are fixedly connected at equal intervals around the top of the annular rotating plate, and the top of the support columns is fixedly connected to the bottom of the outer toothed ring plate.

[0012] Preferably, the top of the lower convex support frame is fixedly connected to a limiting slide shaft, and the top of the internal threaded groove ring plate is provided with a limiting port that is slidably adapted to the limiting slide shaft.

[0013] Preferably, a limiting slide rod is fixedly connected to the top of the shaped pressure ring, and a limiting through groove is provided inside the outer toothed sleeve to slide and adapt to the limiting slide rod.

[0014] This invention also discloses a method for testing the permeability of road surfaces, specifically including the following steps:

[0015] S1. Ground cleaning inspection: The bottom cover is lowered by the internal threaded groove ring plate, which causes the internal threaded groove ring plate to be linked with the pre-cleaning mechanism, causing the brush plate to rotate 180 degrees for pre-cleaning the inspection ground on the right.

[0016] S2, Sealing and Fitting: As the bottom cover descends via the internal threaded groove ring plate, and the internal threaded groove ring plate is elastically pressed and engaged by the sliding support plate and the first return spring, the extrusion box can apply circumferential sealing mud to the annular gap between the inner conical ring seat and the bottom cover during the descent of the internal threaded groove ring plate and the bottom cover. As the bottom cover is pressed against the ground, the shaping pressure ring simultaneously presses and twists the sealing mud dispersed between the inner conical ring seat and the bottom cover, causing the sealing mud to form an annular sealing strip between the ground, the inner conical ring seat and the bottom cover.

[0017] S3, Cover Deployment: The bottom cover descends simultaneously with the transparent plastic measuring cup, causing the cover plate in the cover mechanism to automatically deploy when the transparent plastic measuring cup has finished descending, following the preset tilt trajectory between the guide roller and the guide slide frame.

[0018] S4. Water seepage test: Then add water into the transparent plastic measuring cup. After adding water, open the valve on the front of the transparent plastic measuring cup to connect the transparent plastic measuring cup with the base cover. After water starts to flow between the base cover and the ground, open the exhaust valve on the top of the base cover. After water comes out of the exhaust valve, close it. Beneficial effects

[0019] This invention provides a pavement permeability testing device and method. Compared with existing technologies, it has the following advantages:

[0020] (1) The road surface permeability testing device and its testing method, by setting a self-sealing bonding mechanism, a pre-cleaning mechanism and a shielding mechanism between the lower convex support frame, the bottom cover and the transparent plastic measuring cup, enables the device to self-bond the ground through the coordinated cooperation of the self-sealing bonding mechanism, the pre-cleaning mechanism and the shielding mechanism, and simultaneously clean the test ground during the bonding process, and simultaneously apply sealing mud between the bottom cover and the inner conical ring seat during the process of bonding the bottom cover to the ground, and twist and flatten the sealing mud to make the sealing mud easy to match and shape with the device, and fill the space between the inner conical ring seat, the bottom cover and the ground to form a rapid seal, and simultaneously unfold the shielding on the top of the transparent plastic measuring cup when it is ready to be used.

[0021] (2) The road surface permeability testing device and its testing method, by setting the inner conical ring seat to an inner conical shape, makes it easier for the sealing mud to fill the space between the inner conical ring seat and the bottom cover after the sealing mud is pressed by the plastic pressure ring.

[0022] (3) The road surface permeability testing device and its testing method are to install the sealing plate on the top of the extrusion box by bolts, so that the sealing plate is easy to disassemble, so that an appropriate amount of sealing mud can be filled into the extrusion box during subsequent use.

[0023] (4) The road surface water permeability testing device and its testing method are provided by protruding at the four corners of the bottom of the convex support frame, so that when the convex support frame contacts the ground through the protruding part, the brush part of the brush plate can be attached to the ground for cleaning. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the bottom cover of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the bottom cover of the present invention from another perspective;

[0027] Figure 4 For the present invention Figure 2 A magnified view of a section at point A in the middle;

[0028] Figure 5 For the present invention Figure 2 A magnified view of a section at point B in the middle;

[0029] Figure 6 This is an unfolded view of the extrusion box and sealing plate structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the self-sealing bonding mechanism structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the internal structure of the outer toothed sleeve of the present invention;

[0032] Figure 9 This is a schematic diagram of the convex support frame structure of the present invention;

[0033] Figure 10 This is a schematic diagram (a) of the pre-cleaning mechanism structure of the present invention;

[0034] Figure 11 This is a schematic diagram (II) of the pre-cleaning mechanism structure of the present invention;

[0035] Figure 12 This is a schematic diagram (III) of the pre-cleaning mechanism structure of the present invention;

[0036] Figure 13 This is a schematic diagram of the shielding mechanism structure of the present invention.

[0037] In the diagram: 1. Lower convex support frame; 2. Height adjustment mechanism; 201. Bending frame; 202. Second electric telescopic rod; 203. U-shaped frame; 204. Pulley; 3. Threaded shaft; 4. Internal threaded groove ring plate; 5. Base cover; 6. Transparent plastic measuring cup; 7. Self-sealing bonding mechanism; 701. L-shaped plate; 702. Hollow base plate; 703. Inner conical ring seat; 704. External toothed ring plate; 705. Internal toothed ring cover; 706. Extrusion box; 707. Sealing plate; 708. Pressure block; 709. Push rod; 710. First electric telescopic rod; 711. Servo motor; 712. First gear; 713. Second gear; 714. External toothed sleeve; 715. Vertical rod; 716. Third gear; 717. Internal threaded cylinder; 718. Threaded rod; 719. Molding pressure ring 720. Driven gear; 721. Main gear; 722. Slide frame; 723. Sliding support plate; 724. First return spring; 725. Annular slide; 726. Annular rotating plate; 727. Support column; 728. Guide slide; 729. Guide slider; 8. Pre-cleaning mechanism; 801. Column; 802. Horizontal column; 803. Bevel gear; 804. Fourth gear; 805. Tooth plate; 806. Brush plate; 807. Ratchet; 808. Storage box; 809. Pawl; 810. Second return spring; 9. Shielding mechanism; 901. Receiving plate; 902. Slide carriage; 903. Shielding plate; 904. Guide slide frame; 905. Guide roller; 10. Limiting slide shaft; 11. Limiting through-hole; 12. Limiting slide rod; 13. Limiting through-slot. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0039] Please see Figure 1-13This invention provides a technical solution: a road surface permeability testing device, comprising a convex support frame 1 and a height adjustment mechanism 2. The height adjustment mechanism 2 is disposed on the top of the convex support frame 1. A threaded shaft 3 is rotatably connected to the top of the convex support frame 1 via a bearing. An internally threaded grooved ring plate 4 is threadedly connected to the surface of the threaded shaft 3. A bottom cover 5 is slidably connected inside the internally threaded grooved ring plate 4. A transparent plastic measuring cup 6 is connected to the top of the bottom cover 5. A limiting slide shaft 10 is fixedly connected to the top of the convex support frame 1. A limiting opening 11 that slides and adapts to the limiting slide shaft 10 is opened on the top of the internally threaded grooved ring plate 4. The height adjustment mechanism 2 includes a bending frame 201. Two bending frames 201 are provided, and the two bending frames 201 are respectively fixedly disposed on the convex support frame 10. On both sides of the top of the carrier 1, the bottom of the bent part of the bending frame 201 is fixedly connected to the second electric telescopic rod 202. The bottom of the extended end of the second electric telescopic rod 202 is fixedly connected to the U-shaped frame 203, and the bottom of the U-shaped frame 203 extends to the bottom of the lower convex carrier 1. The front and rear sides of the bottom of the U-shaped frame 203 are provided with pulleys 204. For detailed explanation: the front of the transparent plastic measuring cup 6 is provided with a valve, and the top of the bottom cover 5 is provided with an exhaust valve. The sealing mud of this device is putty. Putty is an adhesive used to seal, preserve something or prevent moisture or air from seeping in. Putty, also known as grease, is a commonly used sealing and filling material. In water seepage detection, putty can be used as a sealing material to help identify and repair water leakage points.

[0040] In a preferred embodiment, to facilitate automatic sealing and reinforcement of the device, a self-sealing bonding mechanism 7 is provided at the bottom of the base cover 5. The self-sealing bonding mechanism 7 includes two L-shaped plates 701, which are respectively fixedly installed on the front and rear sides of the base cover 5. A hollow base plate 702 is fixedly connected to the bottom of the two L-shaped plates 701. An inner conical ring seat 703, which is used in conjunction with the base cover 5, is fixedly connected inside the hollow base plate 702. An outer toothed ring plate 704 is rotatably installed on the top of the hollow base plate 702. An inner toothed ring cover 705 is fixedly connected inside the outer toothed ring plate 704. A plurality of inner toothed ring covers equidistantly fixedly connected around the surface of the inner toothed ring cover 705 by means of mounting grooves. An extrusion box 706 has a sealing plate 707 bolted to its top. A pressure block 708 is slidably connected inside the extrusion box 706, and a push rod 709 is fixedly connected to the surface of the pressure block 708. One end of the push rod 709 extends to the outside of the extrusion box 706. A first electric telescopic rod 710 is fixedly mounted on the surface of the extrusion box 706, and its extension end is fixedly connected to the surface of the push rod 709 via a bracket. A servo motor 711 is fixedly connected to the top of a hollow base plate 702. A first gear 712, meshing with an external gear ring plate 704, is mounted on the surface of the output shaft of the servo motor 711. A threaded shaft 3 is slidably connected to a gear 712 that meshes with the first gear 712. The second gear 713 is rotatably mounted on the top of the hollow base plate 702 via bearings and a bracket. An outer gear sleeve 714 is rotatably connected to the outer wall of the base cover 5, located inside the inner gear ring cover 705, via bearings. A vertical rod 715 is rotatably connected to the bottom of the bend in the L-shaped plate 701, and a third gear 716, meshing with the inner gear ring cover 705 and the outer gear sleeve 714, is fixedly connected to the bottom of the vertical rod 715. An internally threaded cylinder 717 is rotatably connected to the inside of the outer gear sleeve 714 via an opening in the mounting groove. A threaded rod 718 is threadedly connected to the inside of the internally threaded cylinder 717, with one end of the threaded rod 718 extending to the bottom of the outer gear sleeve 714. One end is fixedly connected to a plastic pressure ring 719, the surface of the internal threaded cylinder 717 is fixedly connected to a driven gear 720, the surface of the bottom cover 5 is fixedly connected to a main gear 721 that meshes with the driven gear 720, both sides of the bottom cover 5 are fixedly connected to a sliding groove frame 722, the inside of the sliding groove frame 722 is slidably connected to a sliding support plate 723, a first return spring 724 is fixedly connected between the sliding support plate 723 and the sliding groove frame 722, the opposite sides of the two sliding support plates 723 are respectively fixedly connected to both sides of the inner cavity of the internal threaded groove ring plate 4, both sides of the threaded shaft 3 are provided with guide grooves 728, both sides of the inner cavity of the second gear 713 are fixedly connected to guide sliders 729 that are slidably adapted to the guide grooves 728;

[0041] The top of the lower convex support frame 1 is provided with an annular sliding groove 725. An annular rotating plate 726 is rotatably connected inside the annular sliding groove 725. Several support columns 727 are fixedly connected around the top of the annular rotating plate 726 at equal intervals. The top of the support columns 727 is fixedly connected to the bottom of the outer toothed ring plate 704. The top of the plastic pressure ring 719 is fixedly connected with a limiting slide rod 12. The inside of the outer toothed sleeve 714 is provided with a limiting through groove 13 that slides and adapts to the limiting slide rod 12.

[0042] In a preferred embodiment, to facilitate pre-cleaning of the test surface, a pre-cleaning mechanism 8 is provided on the top of the convex support frame 1. The pre-cleaning mechanism 8 includes a column 801, which is rotatably mounted on the top of the convex support frame 1. A horizontal column 802 is rotatably connected to the top of the convex support frame 1 via a bracket and bearing. Meshing bevel gears 803 are fixedly connected to the surfaces of both the horizontal column 802 and the column 801. A fourth gear 804 is fixedly connected to the surface of the horizontal column 802. One side of the internally threaded grooved ring plate 4 is fixedly connected via a bracket. There is a toothed plate 805 that meshes with the fourth gear 804. The bottom end of the column 801 extends to the bottom of the lower convex support frame 1. A brush plate 806 is fixedly connected to the front side of the column 801 and located at the bottom of the lower convex support frame 1. A ratchet 807 is fixedly connected to the surface of the column 801. A storage box 808 is fixedly connected to the top of the lower convex support frame 1. A pawl 809 that matches the ratchet 807 is slidably connected inside the storage box 808. A second return spring 810 is fixedly connected between the pawl 809 and the storage box 808.

[0043] In a preferred embodiment, to facilitate flexible switching of the shielding state of the transparent plastic measuring cup 6, a shielding mechanism 9 is provided on the top of the convex support frame 1 and on the rear side of the transparent plastic measuring cup 6. The shielding mechanism 9 includes a receiving plate 901. Two receiving plates 901 are provided, and the two receiving plates 901 are respectively fixedly installed on both sides of the transparent plastic measuring cup 6. A slide 902 is slidably connected to the surface of the receiving plate 901. A shielding plate 903 is fixedly connected to the top of the slide 902. Guide slide frames 904 are fixedly connected to both sides of the top of the convex support frame 1 through brackets. A guide roller 905, which is used in conjunction with the guide slide frame 904, is rotatably connected to the rear side of the shielding plate 903 through a bearing.

[0044] This invention also discloses a method for testing the permeability of road surfaces, specifically including the following steps:

[0045] S1. Detection of ground cleaning: The bottom cover 5 is lowered by the internal thread groove ring plate 4, which causes the internal thread groove ring plate 4 to be linked with the pre-cleaning mechanism 8, causing the brush plate 806 to rotate 180 degrees for pre-cleaning, so as to pre-clean the test ground on the right.

[0046] The specific steps are as follows: After the device moves to the test surface, the retraction of the extension end of the second electric telescopic rod 202 causes the four convex surfaces at the bottom of the lower convex support frame 1 to fit with the ground. Then, the servo motor 711 is started. The servo motor 711 drives the first gear 712 and the second gear 713 to mesh, causing the threaded shaft 3 to rotate. The rotation of the threaded shaft 3 causes the inner thread groove ring plate 4 on its surface to drive the bottom cover 5, the hollow bottom plate 702 and the inner conical ring seat 703 to approach the ground. When the inner thread groove ring plate 4 descends, it drives the toothed plate 805 to mesh with the fourth gear 804, causing the horizontal column 802 to rotate synchronously. The rotation of the horizontal column 802, through the meshing of the two bevel gears 803, causes the column 801 to drive the brush plate 806 to rotate 180 degrees from front to back, completing the pre-sweeping of the test surface. At the same time that the brush plate 806 completes the sweeping, the engagement stroke of the fourth gear 804 with the toothed plate 805 is disengaged.

[0047] S2, Sealing and Fitting: As the inner threaded groove ring plate 4 carries the bottom cover 5 down, and the inner threaded groove ring plate 4 is elastically pressed and engaged by the sliding support plate 723 and the first return spring 724, the extrusion box 706 can apply circumferential sealing mud to the annular gap between the inner conical ring seat 703 and the bottom cover 5. As the bottom cover 5 is pressed against the ground, the shaping pressure ring 719 simultaneously presses and twists the sealing mud dispersed between the inner conical ring seat 703 and the bottom cover 5, so that the sealing mud forms an annular sealing strip between the ground, the inner conical ring seat 703 and the bottom cover 5.

[0048] The specific steps are as follows: As the threaded shaft 3 continues to rotate, the inner threaded groove ring plate 4 synchronously drives the bottom cover 5 and the inner conical ring seat 703 to adhere to the ground. At the same time, the first electric telescopic rod 710 is activated, causing the first electric telescopic rod 710 to drive the pressure block 708 through the push rod 709 to squeeze the solid sealing mud inside the extrusion box 706. The extruded solid sealing mud falls into the gap between the inner conical ring seat 703 and the bottom cover 5. Secondly, during the rotation of the first gear 712 driven by the servo motor 711, the first gear 712 meshes with the outer toothed ring plate 704, causing the outer toothed ring plate 704 to drive several extrusion boxes 706 to circumferentially extrude the solid sealing mud through the inner toothed ring cover 705.

[0049] During the rotation of the internal gear ring cover 705, it meshes synchronously with the third gear 716 and the external gear sleeve 714, causing the external gear sleeve 714 to drive the internal threaded cylinder 717 to rotate circumferentially. During the rotation of the internal threaded cylinder 717, the driven gear 720 on its surface meshes with the fixed main gear 721, causing the threaded rod 718 in the internal threaded cylinder 717 to drive the plastic pressure ring 719 to extend downward and press synchronously on the basis of circumferential movement. As the plastic pressure ring 719 extends downward, it will approach the gap between the inner conical ring seat 703 and the bottom cover 5. At the same time, the internal threaded groove ring plate 4 drives the bottom cover 5 and the inner conical ring seat 703 to adhere to the ground. As the internal threaded groove ring plate 4 continues to descend, the internal threaded groove ring plate 4 will elastically press the bottom cover 5 through the elastic cooperation of the sliding support plate 723 and the first return spring 724.

[0050] During the descent of the internal threaded groove ring plate 4 to elastically press the bottom cover 5, the shaped pressure ring 719 continues to rotate and descend. During the rotation and descent of the shaped pressure ring 719, the solid sealing mud between the inner conical ring seat 703 and the annular gap of the bottom cover 5 is simultaneously twisted and pressed. This causes the multi-point distributed sealing mud to form a ring shape through twisting and pressing with the inner conical ring seat 703, so that it can maintain a seal between the ground, the inner conical ring seat 703 and the bottom cover 5.

[0051] S3, Covering Deployment: The bottom cover 5 descends simultaneously, driving the transparent plastic measuring cup 6 to descend as well. This causes the cover plate 903 in the cover mechanism 9 to automatically deploy when the transparent plastic measuring cup 6 has finished descending, following the preset tilt trajectory between the guide roller 905 and the guide slide frame 904.

[0052] The specific steps are as follows: the bottom cover 5 descends and simultaneously drives the transparent plastic measuring cup 6 to descend. The transparent plastic measuring cup 6 simultaneously drives the receiving plate 901 and the shielding plate 903 to descend. The shielding plate 903 drives the guide roller 905 to slide inside the guide frame 904. After the bottom cover 5 is sealed and attached to the ground, the corresponding guide roller 905 will follow the inclined trajectory of the guide frame 904 and drive the shielding plate 903 to detach from the shielding of the transparent plastic measuring cup 6.

[0053] S4. Water seepage test: Then add water into the transparent plastic measuring cup 6. After adding water, open the valve on the front of the transparent plastic measuring cup 6 to connect the transparent plastic measuring cup 6 with the bottom cover 5. After water starts to flow between the bottom cover 5 and the ground, open the exhaust valve on the top of the bottom cover 5. After water comes out of the exhaust valve, close it.

Claims

1. A road surface permeability testing device, comprising a convex support frame (1) and a height adjustment mechanism (2), wherein the height adjustment mechanism (2) is disposed on the top of the convex support frame (1), characterized in that: The top of the convex support frame (1) is rotatably connected to a threaded shaft (3) via a bearing. The surface of the threaded shaft (3) is threadedly connected to an internal threaded groove ring plate (4). The inside of the internal threaded groove ring plate (4) is slidably connected to a bottom cover (5). The top of the bottom cover (5) is connected to a transparent plastic measuring cup (6). The bottom of the bottom cover (5) is provided with a self-sealing bonding mechanism (7). The top of the convex support frame (1) is provided with a pre-cleaning mechanism (8). The top of the convex support frame (1) and the rear side of the transparent plastic measuring cup (6) are provided with a shielding mechanism (9). The self-sealing bonding mechanism (7) includes two L-shaped plates (701), which are respectively fixedly installed on the front and rear sides of the base cover (5). A hollow base plate (702) is fixedly connected to the bottom of both L-shaped plates (701). An inner conical ring seat (703) matching the base cover (5) is fixedly connected inside the hollow base plate (702). An outer toothed ring plate (704) is rotatably installed on the top of the hollow base plate (702). An inner toothed ring cover (705) is fixedly connected inside the outer toothed ring plate (704). Several extrusion boxes (706) are fixedly connected around the surface of the inner toothed ring cover (705) by means of mounting grooves. A sealing plate (707) is bolted to the top of the extrusion box (706). A pressure block (708) is slidably connected inside the extrusion box (706), and a push rod (709) is fixedly connected to the surface of the pressure block (708). One end of the push rod (709) extends to the outside of the extrusion box (706). A first electric telescopic rod (710) is fixedly provided on the surface of the extrusion box (706), and the extension end of the first electric telescopic rod (710) is fixedly connected to the surface of the push rod (709) through a bracket. A servo motor (711) is fixedly connected to the top of the hollow base plate (702). A first gear (712) that meshes with an external gear ring plate (704) is mounted on the surface of the output shaft of the servo motor (711). The surface of the threaded shaft (3) is slidably connected to a second gear (713) that meshes with the first gear (712), and the bottom of the second gear (713) is rotatably mounted on the top of the hollow base plate (702) via bearings and brackets. The outer wall of the base cover (5) and inside the inner gear ring cover (705) is rotatably connected to an outer gear sleeve (714) via bearings. The bottom of the bend of the L-shaped plate (701) is rotatably connected to a vertical rod (715), and the bottom of the vertical rod (715) is fixedly connected to a third gear (716) that meshes with the inner gear ring cover (705) and the outer gear sleeve (714). The inside of the outer gear sleeve (714) is rotatably connected to an inner threaded cylinder (717) via an opening in the mounting groove. The internal threaded cylinder (717) is connected to a threaded rod (718), one end of which extends to the bottom of the outer gear sleeve (714). A plastic pressure ring (719) is fixedly connected to the end of the threaded rod (718) extending to the bottom of the outer gear sleeve (714). A driven gear (720) is fixedly connected to the surface of the internal threaded cylinder (717). A main gear (721) meshing with the driven gear (720) is fixedly connected to the surface of the bottom cover (5). Sliding groove frames (722) are fixedly connected to both sides of the bottom cover (5). A sliding support plate (723) is slidably connected inside the sliding groove frame (722). A first return spring (724) is fixedly connected between the sliding support plate (723) and the sliding groove frame (722).The two sliding support plates (723) are fixedly connected to the two sides of the inner cavity of the internal threaded groove ring plate (4) on opposite sides. Guide grooves (728) are provided on both sides of the threaded shaft (3). Guide sliders (729) that slide and adapt to the guide grooves (728) are fixedly connected to both sides of the inner cavity of the second gear (713). The pre-cleaning mechanism (8) includes a column (801), which is rotatably mounted on the top of the lower convex support frame (1). A horizontal column (802) is rotatably connected to the top of the lower convex support frame (1) via a bracket and bearing. Meshing bevel gears (803) are fixedly connected to the surfaces of both the horizontal column (802) and the column (801). A fourth gear (804) is fixedly connected to the surface of the horizontal column (802). A toothed plate (805) meshing with the fourth gear (804) is fixedly connected to one side of the internally threaded grooved ring plate (4) via a bracket. The bottom end of the column (801) extends to the bottom of the lower convex support frame (1). A brush plate (806) is fixedly connected to the front side of the column (801) and the bottom of the lower convex support frame (1). A ratchet (807) is fixedly connected to the surface of the column (801). A storage box (808) is fixedly connected to the top of the lower convex support frame (1). A pawl (809) that is matched with the ratchet (807) is slidably connected inside the storage box (808). A second return spring (810) is fixedly connected between the pawl (809) and the storage box (808). The shielding mechanism (9) includes a receiving plate (901), and two receiving plates (901) are provided. The two receiving plates (901) are respectively fixedly installed on both sides of the transparent plastic measuring cup (6). A slide (902) is slidably connected to the surface of the receiving plate (901). A shielding plate (903) is fixedly connected to the top of the slide (902). Guide slide frames (904) are fixedly connected to both sides of the top of the convex support frame (1) through brackets. A guide roller (905) that is used in conjunction with the guide slide frame (904) is rotatably connected to the rear side of the shielding plate (903) through a bearing.

2. The pavement permeability testing device according to claim 1, characterized in that: The height adjustment mechanism (2) includes a bending frame (201), and there are two bending frames (201). The two bending frames (201) are respectively fixedly installed on both sides of the top of the lower convex support frame (1). A second electric telescopic rod (202) is fixedly connected to the bottom of the bending part of the bending frame (201). A U-shaped frame (203) is fixedly connected to the bottom of the extension end of the second electric telescopic rod (202). The bottom of the U-shaped frame (203) extends to the bottom of the lower convex support frame (1). Pulleys (204) are provided on the front and rear sides of the bottom of the U-shaped frame (203).

3. The pavement permeability testing device according to claim 1, characterized in that: The top of the lower convex support frame (1) is provided with an annular groove (725), and an annular rotating plate (726) is rotatably connected inside the annular groove (725). Several support columns (727) are fixedly connected around the top of the annular rotating plate (726) at equal intervals, and the top of the support columns (727) is fixedly connected to the bottom of the outer toothed ring plate (704).

4. The pavement permeability testing device according to claim 1, characterized in that: The top of the lower convex support frame (1) is fixedly connected to a limiting slide shaft (10), and the top of the internal threaded groove ring plate (4) is provided with a limiting port (11) that is slidably adapted to the limiting slide shaft (10).

5. The pavement permeability testing device according to claim 1, characterized in that: The top of the plastic pressure ring (719) is fixedly connected to a limiting slide rod (12), and the inside of the outer toothed sleeve (714) is provided with a limiting through groove (13) that slides and adapts to the limiting slide rod (12).

6. A method for testing the permeability of road surfaces, characterized in that: Specifically, the following steps are included: S1. Detection of ground cleaning: The bottom cover (5) is lowered by the internal thread groove ring plate (4), which causes the internal thread groove ring plate (4) to be linked with the pre-cleaning mechanism (8), causing the brush plate (806) to rotate 180 degrees for pre-cleaning, so as to pre-clean the test ground on the right side. S2, Sealing and Fitting: The bottom cover (5) is lowered by the inner thread groove ring plate (4), and the inner thread groove ring plate (4) is elastically pressed and engaged by the sliding support plate (723) and the first return spring (724) to cause the inner thread groove ring plate (4) and the bottom cover (5) to descend. During this process, the extrusion box (706) can apply circumferential sealing mud to the annular gap between the inner conical ring seat (703) and the bottom cover (5). During the process of the bottom cover (5) being close to the ground, the shaping pressure ring (719) simultaneously presses and twists the sealing mud dispersed between the inner conical ring seat (703) and the bottom cover (5) to promote the sealing mud to form an annular sealing strip, which is located between the ground, the inner conical ring seat (703) and the bottom cover (5). S3, Covering Deployment: The bottom cover (5) descends simultaneously with the transparent plastic measuring cup (6), causing the cover plate (903) in the cover mechanism (9) to automatically deploy when the transparent plastic measuring cup (6) has finished descending, following the preset tilt trajectory between the guide roller (905) and the guide slide frame (904). S4. Water seepage test: Then add water into the transparent plastic measuring cup (6). After adding water, open the valve on the front of the transparent plastic measuring cup (6) to make the transparent plastic measuring cup (6) connect with the bottom cover (5). After water starts to flow between the bottom cover (5) and the ground, open the exhaust valve on the top of the bottom cover (5). After water comes out of the exhaust valve, close it.

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