Expansion Amount Detection Device and Method for Asphalt Composite Road Crack Sealing for Rainwater Collection

Abstract

The present invention discloses a device and method for detecting the expansion amount of road joint seals for asphalt composite rainwater collection, belonging to the technical field of road joint seal expansion amount. The device and method for detecting the expansion amount of road joint seals for asphalt composite rainwater collection of the present invention include a first device housing, and an embedding depth detection rod is arranged at the lower end of the outer part of the first device housing; the embedding depth detection rod is fixedly welded to a sealing push plate, a first air storage cavity is arranged at the upper end of the outer part of the sealing push plate, and a second air storage cavity is arranged at one side of the lower end of the outer part of the sealing push plate. The present invention solves the problem that the data accuracy of distance detection of the existing detection device is reduced. In the present invention, the fixed plate is attached to the ground, the first air storage cavity and the second air storage cavity are pushed up and adjusted to store the air volume inside, and the second exhaust check valve and the third exhaust check valve are used to limit the air in and out, so as to avoid the user having to get close to directly observe the inserted distance.

Description

Technical Field

[0001] The present invention relates to the technical field of road joint expansion amounts, and particularly to a device and method for detecting the expansion amount of road joints for asphalt composite rainwater collection. Background Art

[0002] During the road design process, different roads are designed to meet different usage requirements. To avoid rainwater pooling, an asphalt composite rainwater collection road is designed. During the actual use of the road, vehicle rolling will cause cracks in the road, which are called joint filling. To improve the service life of the road, people will regularly detect the joint filling and fill and repair it.

[0003] Chinese Patent with Publication No. CN212658187U discloses a pavement crack depth detection device, including a limit plate, which comprises a support base, a protective column, a weak magnetic plate, a concave groove, a cone head, a soft steel needle, an adsorption metal ball, a dust blowing air duct, and an intake fan; protective columns are arranged at the four corners of the support base, and a weak magnetic plate is arranged at the upper end of the protective column; a concave groove is arranged at the lower end of the support base, several soft steel needles are arranged side by side and inserted through the middle of the support base, the lower end of the soft steel needle is connected with a cone head, and the cone heads are neatly arranged inside the concave groove. The upper end of the soft steel needle is connected with an adsorption metal ball, and the adsorption metal ball cooperates with the weak magnetic plate to suspend the soft steel needles together; a dust blowing air duct is arranged on the left side of the support base, and the top of the dust blowing air duct is connected with an intake fan. The cooperation of the thin steel needle and the cone head is evenly inserted into the road crack section, and the structure in the crack can be shown through the height dislocation of the thin steel needles, which is convenient for further research on the cracking cause.

[0004] During the actual use of the above-mentioned crack depth detection device, for the detection data of the distance, the user needs to lift the device or get close to the device to know the detection data. On the other hand, when lifting the device, the device will shift without restriction, resulting in a decrease in the accuracy of data detection; therefore, it does not meet the existing requirements. For this reason, we propose a device and method for detecting the expansion amount of road joints for asphalt composite rainwater collection. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for detecting the expansion amount of a road crack filling for asphalt composite rainwater collection. By attaching the fixed piece to the ground and inserting the embedding depth detection rod into the depression position to be detected, the depression position can limit and push the embedding depth detection rod to drive the sealing push piece to move vertically upward in the first air storage cavity. The upward movement pushes and adjusts the air storage amounts inside the first air storage cavity and the second air storage cavity. Through the flow and extrusion of air, and with the restriction of the second exhaust check valve and the third exhaust check valve on the air inlet and outlet, the embedding depth detection rod can be adapted to the crack filling depth and cannot extend out after being inserted into the first device housing, making the embedding depth of the embedding depth detection rod relatively fixed and not changing the value when the device is picked up after measurement, avoiding the need for the user to get close to directly observe the insertion distance, improving the detection accuracy, facilitating the user to perform the detection, and improving the comfort during the detection process, thus solving the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: A device for detecting the expansion amount of a road crack filling for asphalt composite rainwater collection, including a first device housing, an embedding depth detection rod is arranged at the lower end of the outer part of the first device housing, and the embedding depth detection rod is hermetically and slidably connected with the first device housing through a second sealing ring;

[0007] It further includes a sealing push piece, which is arranged at one end of the embedding depth detection rod, and the embedding depth detection rod is fixedly welded with the sealing push piece. A first air storage cavity is arranged at the upper end of the outer part of the sealing push piece, and a second air storage cavity is arranged at one side of the lower end of the outer part of the sealing push piece. A partition plate is arranged between the second air storage cavity and the first air storage cavity, and the partition plate is fixedly welded with the first device housing. An air linkage cavity is arranged at the lower end of the partition plate, and the air linkage cavity penetrates and extends to both sides of the partition plate. A second exhaust check valve is arranged at the upper end of the outer part of the first air storage cavity, and a third exhaust check valve is arranged at the upper end of the outer part of the second air storage cavity.

[0008] Preferably, fixed pieces are arranged on both sides of the outer part of the first device housing, the fixed pieces and the first device housing are of an integral structure, an anti-slip pad is arranged at the lower end of the fixed piece, and the anti-slip pad is adhesively fixed with the fixed piece. A fixing plate is arranged at the front end of the fixed piece, and a whole row of dimension forming strips is arranged at the lower end of the outer part of the fixing plate.

[0009] Preferably, a number of the dimension forming strips are arranged in a whole row, and the dimension forming strips are hermetically and slidably connected with the fixing plate through a third sealing ring.

[0010] Preferably, a width detection plate is arranged on one side of the fixing plate, and one side of the width detection plate is fixedly welded with one side of the fixing plate.

[0011] Preferably, a sealing filling block is provided at the upper end of the fixing plate. A third air storage cavity is provided inside the sealing filling block. A reset plate is provided at the lower end inside the third air storage cavity. Transmission rods are provided on both sides of the upper end of the reset plate. The outer part of the transmission rod is hermetically and slidably connected to the inside of the second device housing through a first sealing ring. One ends of the two transmission rods are fixedly connected through a first pulling handle.

[0012] Preferably, a first exhaust check valve is provided in the middle of the lower end of the first pulling handle. The first exhaust check valve is hermetically connected to the second device housing. A first air flow ring is provided at the front end of the first exhaust check valve. A sealing filling block is provided outside the first air flow ring, and the sealing filling block is hermetically and slidably connected to the first air flow ring.

[0013] Preferably, second air flow rings are provided on one side of each of the second exhaust check valve and the third exhaust check valve. Second pulling handles are provided outside the second air flow rings. The lower end outside the second pulling handle is hermetically and slidably connected to the inside of the second air flow ring.

[0014] Preferably, clamping handles are provided on both sides of the upper end of the first device housing. The lower ends of the two clamping handles are fixedly connected to the upper end of the first device housing.

[0015] A method for detecting the expansion amount of a road crack filling for asphalt composite rainwater collection includes the following steps:

[0016] Step 1: The embedding depth detection rod is vertically oriented towards the position to be detected and inserted into the crack, and is made to fit against the upper end outside the crack. With continuous pressing, the embedding depth detection rod extends into the first device housing.

[0017] Step 2: Press vertically until the lower end of the fixing piece outside the first device housing fits against the road surface for asphalt composite rainwater collection. During the pressing process, the sealing push piece at one end of the embedding depth detection rod moves longitudinally upward in the first air storage cavity. The upward movement can push the air inside the first air storage cavity, and the squeezed air is discharged through the second exhaust check valve. The external air can enter the second air storage cavity through the third exhaust check valve to complete the filling of the second air storage cavity.

[0018] Step 3: The air inside the second air storage cavity and the first air storage cavity can restrict the sealing push piece, thereby restricting and fixing the embedding depth of the embedding depth detection rod.

[0019] Step 4: When pressing the first device housing to make the lower end of the fixing piece fit the asphalt composite rainwater collection road, it will drive several sizing strips arranged in an array at the lower end of the fixing plate to contact the curved caulking seam. The sizing strips will be restricted respectively by the concave and flat caulking seams and the asphalt composite rainwater collection road, and be restricted and pushed to make the sizing strips at the corresponding positions embed into the second device housing;

[0020] Step 5: The embedded sizing strips will squeeze the third air storage cavity inside the sealing filling block, so that the air inside the third air storage cavity is discharged through the first exhaust check valve, and the discharged air makes the shape of the sizing strips remain fixed;

[0021] Step 6: Simulate the shape of the caulking seam through the concave, and understand the different widths at different bending positions with the reference of the width detection plate;

[0022] Step 7: By taking out the sealing filling block and pressing the first pulling handle, all the sizing strips can be extended and reset;

[0023] Step 8: Take out the second pulling handle from the second air flow ring, so that external air can enter the first air storage cavity and the second air storage cavity respectively. The user manually pulls the embedded depth detection rod and makes it fully extend outside the first device housing to complete the reset of the embedded depth detection rod.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. In the present invention, a second air storage cavity is arranged on one side inside the first device housing, a first air storage cavity is arranged on the other side inside the first device housing, and a partition plate is arranged between the first air storage cavity and the second air storage cavity. During actual use, the fixing piece fits the ground, and after the embedded depth detection rod extends into the depression to be detected, the depression position can restrict and push the embedded depth detection rod to drive the sealing push piece to move longitudinally upward in the first air storage cavity. The upward movement pushes and adjusts the air storage amounts inside the first air storage cavity and the second air storage cavity. Through the flow and extrusion of air, and with the restriction of the second exhaust check valve and the third exhaust check valve on the air inlet and outlet, the embedded depth detection rod can be adapted to the caulking depth and cannot extend out after being embedded inside the first device housing, so that the embedded depth of the embedded depth detection rod is relatively fixed and will not change during the measurement and when the device is picked up later, avoiding the need for the user to get close to directly observe the extension distance, improving the detection accuracy, facilitating the user to perform the detection, and improving the comfort during the detection process.

[0026] 2. In the present invention, a second device housing is provided on one side outside the first device housing. A whole row of dimension forming strips is provided at the lower end outside the second device housing. A third air storage chamber is provided in the middle inside the second device housing. A reset plate is provided at the lower end outside the third air storage chamber. During actual use, after the fixing piece adheres to the lower end of the fixing plate, the depression of the caulking will cause multiple dimension forming strips to be adapted and generate a convex shape that fits the caulking. The convex shape will be assisted in fixing by the air pressure inside the third air storage chamber. The assisted fixing facilitates viewing when the device is lifted and can display the caulking with a curved shape. With the width detection plate on one side for reference, it is convenient for the user to know the required width at the current required position. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a three-dimensional view of the overall external structure of the present invention;

[0028] Figure 2 is a three-dimensional view of the external structure of the width detection plate of the present invention;

[0029] Figure 3 For the present invention Figure 2 is a partially enlarged view of area A;

[0030] Figure 4 is a cross-sectional view of the internal structure of the first device housing of the present invention;

[0031] Figure 5 For the present invention Figure 4 is a partially enlarged view of area B;

[0032] Figure 6 For the present invention Figure 4 is a partially enlarged view of area C;

[0033] Figure 7 For the present invention Figure 4 is a partially enlarged view of area D;

[0034] Figure 8 For the present invention Figure 4 is a partially enlarged view of area E.

[0035] In the figure: 1. First device housing; 2. Embedding depth detection rod; 3. Fixed piece; 4. Fixed plate; 5. Width detection plate; 6. Second device housing; 7. Sealing and filling block; 8. First air flow ring; 9. First pulling handle; 10. Transmission rod; 11. First sealing ring; 12. First exhaust check valve; 13. Clamping handle; 14. Second exhaust check valve; 15. Third exhaust check valve; 16. Second pulling handle; 17. Anti-slip pad; 18. Second sealing ring; 19. Dimension forming strip; 20. First air storage chamber; 21. Partition plate; 22. Second air storage chamber; 23. Third air storage chamber; 24. Reset plate; 25. Third sealing ring; 26. Air linkage chamber; 27. Second air flow ring; 28. Sealing push piece. Detailed implementation mode

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

[0037] To further understand the content of the present invention, please refer to Figures 1-8 , and the following technical solutions are provided in this embodiment:

[0038] A device for detecting the expansion amount of a road crack filling for asphalt composite rainwater collection includes a first device housing 1. At the lower end of the outside of the first device housing 1, there is an embedding depth detection rod 2, and the embedding depth detection rod 2 is hermetically and slidably connected to the first device housing 1 through a second sealing ring 18;

[0039] It further includes a sealing push piece 28, which is arranged at one end of the embedding depth detection rod 2. The embedding depth detection rod 2 is fixedly welded to the sealing push piece 28. At the upper end of the outside of the sealing push piece 28, there is a first air storage chamber 20. On one side of the lower end of the outside of the sealing push piece 28, there is a second air storage chamber 22. A partition plate 21 is arranged between the second air storage chamber 22 and the first air storage chamber 20, and the partition plate 21 is fixedly welded to the first device housing 1. At the lower end of the inside of the partition plate 21, there is an air linkage chamber 26, and the air linkage chamber 26 penetrates and extends to both sides of the partition plate 21. At the upper end of the outside of the first air storage chamber 20, there is a second exhaust check valve 14, and at the upper end of the outside of the second air storage chamber 22, there is a third exhaust check valve 15.

[0040] In order to solve the technical problem that in the actual use of the existing detection device, the user needs to lift the device or get close to the device to understand the detection data for distance detection. On the other hand, if the device is lifted, it will deviate without restriction, resulting in reduced accuracy of data detection. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 , this embodiment provides the following technical solutions:

[0041] A fixing plate 3 is provided on both sides of the outside of the first device housing 1. The fixing plate 3 and the first device housing 1 are an integral structure. An anti-skid pad 17 is provided at the lower end of the fixing plate 3, and the anti-skid pad 17 is adhered and fixed to the fixing plate 3. A fixing plate 4 is provided at the front end of the fixing plate 3. A size forming strip 19 is arranged at the lower end of the outside of the fixing plate 4.

[0042] Specifically, the extruded size molding strip 19 can be extended and retracted and the air flow can be restricted to avoid deformation. Avoiding deformation allows the device to be raised after detection and facilitate direct viewing, avoiding the need for the user to bend the body and get close to the detection position, thereby improving the efficiency and accuracy of the detection.

[0043] For further information, see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 , this embodiment provides the following technical solutions:

[0044] A plurality of dimension forming strips 19 are arranged in a row, and the dimension forming strips 19 are sealingly and slidingly connected to the fixing plate 4 via a third sealing ring 25 .

[0045] Specifically, the size forming strips 19 are restricted by the concave and flat caulking and the asphalt composite rainwater collection road, so that the size forming strips 19 at the corresponding positions are restricted and pushed to be embedded in the second device housing 6.

[0046] For further information, see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 , this embodiment provides the following technical solutions:

[0047] A width detection plate 5 is provided on one side of the fixing plate 4 , and one side of the width detection plate 5 is fixed to one side of the fixing plate 4 by welding.

[0048] Specifically, by comparing with the width detection plate 5, the dimensional forming strips 19 with protrusions and depressions can be compared, and by comparing with and referring to the width detection plate 5, the width of the sunken caulking can be understood.

[0049] Further, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 , this embodiment provides the following technical solutions:

[0050] A sealing and filling block 7 is arranged at the upper end of the fixing plate 4. A third air storage cavity 23 is arranged inside the sealing and filling block 7. A reset plate 24 is arranged at the lower end inside the third air storage cavity 23. Transmission rods 10 are arranged on both sides of the upper end of the reset plate 24. The outer part of the transmission rods 10 is hermetically and slidably connected with the inner part of the second device housing 6 through a first sealing ring 11. One ends of the two transmission rods 10 are fixedly connected through a first pulling handle 9.

[0051] Specifically, by sealing and opening the sealing and filling block 7, the reset of the dimensional forming strip 19 can be completed.

[0052] Further, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 , this embodiment provides the following technical solutions:

[0053] A first exhaust check valve 12 is arranged in the middle at the lower end of the first pulling handle 9. The first exhaust check valve 12 is hermetically connected with the second device housing 6. A first air flow ring 8 is arranged at the front end of the first exhaust check valve 12. A sealing and filling block 7 is arranged outside the first air flow ring 8, and the sealing and filling block 7 is hermetically and slidably connected with the first air flow ring 8.

[0054] Specifically, by restricting the air flow through the first exhaust check valve 12, the fixing of the position of the dimensional forming strip 19 can be completed.

[0055] Further, please refer to Figures 1-8 , this embodiment provides the following technical solutions:

[0056] Second air flow rings 27 are arranged on one side of both the second exhaust check valve 14 and the third exhaust check valve 15. A second pulling handle 16 is arranged outside the second air flow rings 27. The lower end outside the second pulling handle 16 is hermetically and slidably connected with the inside of the second air flow rings 27.

[0057] Specifically, the sealed connection of the first exhaust check valve 12 can prevent air flow inside the reset plate 24. Once the air flow is restricted, the position of the dimension forming strip 19 can be restricted.

[0058] Further, please refer to Figure 1 , Figure 2 and Figure 4 , and the following technical solutions are provided in this embodiment:

[0059] Clamping handles 13 are provided on both sides of the upper end of the first device housing 1, and the lower ends of the two clamping handles 13 are fixedly connected to the upper end of the first device housing 1.

[0060] Specifically, the device can be grasped by pinching the clamping handle 13 with fingers, which is convenient for the user to detect the filling scale.

[0061] The method for detecting the expansion amount of the asphalt composite rainwater collection road crack filling includes the following steps:

[0062] Step 1: The embedding depth detection rod 2 is vertically oriented towards the position to be detected, and is pressed towards the position to be detected, so that the embedding depth detection rod 2 is embedded into the crack filling and fits against the upper end outside the crack filling. With continuous pressing, the embedding depth detection rod 2 extends into the first device housing 1.

[0063] Step 2: Press vertically until the lower end of the fixed piece 3 outside the first device housing 1 fits against the surface of the asphalt composite rainwater collection road. During the pressing process, the sealing push piece 28 at one end of the embedding depth detection rod 2 moves longitudinally upward in the first air storage cavity 20. The upward movement can push the air inside the first air storage cavity 20, and the squeezed air is discharged through the second exhaust check valve 14, while the external air can enter the second air storage cavity 22 through the third exhaust check valve 15 to complete the filling of the second air storage cavity 22.

[0064] Step 3: The air in the second air storage cavity 22 and the first air storage cavity 20 can restrict the sealing push piece 28, thereby restricting and fixing the embedding depth of the embedding depth detection rod 2.

[0065] Step 4: When pressing the first device housing 1 to make the lower end of the fixed piece 3 fit against the asphalt composite rainwater collection road, it will drive several dimension forming strips 19 arranged in an array at the lower end of the fixed plate 4 to contact the curved crack filling, and the dimension forming strips 19 are restricted by the concave and flat crack filling and the asphalt composite rainwater collection road respectively. The restriction and pushing cause the corresponding dimension forming strips 19 to be embedded into the second device housing 6.

[0066] Step Five: The embedded sizing strip 19 squeezes the third air storage cavity 23 inside the sealing and filling block 7, causing the air inside the third air storage cavity 23 to be discharged through the first exhaust check valve 12, and the discharged air keeps the shape of the sizing strip 19 fixed;

[0067] Step Six: Simulate the shape of the caulking through the depression, and refer to it through the width detection plate 5 to understand the different widths at different bending positions;

[0068] Step Seven: By removing the sealing and filling block 7 and pressing the first pulling handle 9, the entire extension of the sizing strip 19 can be completed and the reset can be achieved;

[0069] Step Eight: Take out the second pulling handle 16 from the second air flow ring 27, allowing external air to enter the first air storage cavity 20 and the second air storage cavity 22 respectively, and manually pull the embedded depth detection rod 2 by the user to make it fully extend outside the first device housing 1, completing the reset of the embedded depth detection rod 2.

[0070] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0071] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Asphalt composite rainwater collection road crack filling expansion amount detection device, including a first device housing (1), a lower end of the outside of the first device housing (1) is provided with an embedding depth detection rod (2), and the embedding depth detection rod (2) and the first device housing (1) are hermetically and slidably connected through a second sealing ring (18), characterized in that: It further includes a sealing push piece (28) which is arranged at one end of the embedding depth detection rod (2). The embedding depth detection rod (2) is fixedly welded to the sealing push piece (28). A first air storage cavity (20) is arranged at the upper end of the outside of the sealing push piece (28). A second air storage cavity (22) is arranged at one side of the lower end of the outside of the sealing push piece (28). A partition plate (21) is arranged between the second air storage cavity (22) and the first air storage cavity (20), and the partition plate (21) is fixedly welded to the first device housing (1). An air linkage cavity (26) is arranged at the lower end of the inside of the partition plate (21), and the air linkage cavity (26) penetrates and extends to both sides of the partition plate (21). A second exhaust check valve (14) is arranged at the upper end of the outside of the first air storage cavity (20). A third exhaust check valve (15) is arranged at the upper end of the outside of the second air storage cavity (22). Fixed pieces (3) are arranged on both sides of the outside of the first device housing (1). The fixed pieces (3) and the first device housing (1) are of an integral structure. An anti-slip pad (17) is arranged at the lower end of the fixed piece (3), and the anti-slip pad (17) is adhesively fixed to the fixed piece (3). A fixing plate (4) is arranged at the front end of the fixed piece (3). Size forming strips (19) are arranged in an array at the lower end of the outside of the fixing plate (4). A sealing filling block (7) is arranged at the upper end of the fixing plate (4). A third air storage cavity (23) is arranged inside the sealing filling block (7). A reset plate (24) is arranged at the lower end of the inside of the third air storage cavity (23). Transmission rods (10) are arranged on both sides of the upper end of the reset plate (24). The outside of the transmission rods (10) is hermetically and slidably connected to the inside of the second device housing (6) through a first sealing ring (11). One ends of the two transmission rods (10) are fixedly connected through a first pulling handle (9). A first exhaust check valve (12) is arranged in the middle of the lower end of the first pulling handle (9). The first exhaust check valve (12) is hermetically connected to the second device housing (6). A first air flow ring (8) is arranged at the front end of the first exhaust check valve (12). The outside of the first air flow ring (8) is provided with a sealing filling block (7), and the sealing filling block (7) is hermetically and slidably connected to the first air flow ring (8). Second air flow rings (27) are arranged on one side of each of the second exhaust check valve (14) and the third exhaust check valve (15). A second pulling handle (16) is arranged on the outside of the second air flow ring (27). The outside of the lower end of the second pulling handle (16) is hermetically and slidably connected to the inside of the second air flow ring (27).

2. The asphalt composite rainwater collection road crack filling expansion amount detection device according to claim 1, characterized in that: The size forming strips (19) and the fixing plate (4) are hermetically and slidably connected through a third sealing ring (25).

3. The asphalt composite rainwater collection road crack filling expansion amount detection device according to claim 2, characterized in that: A width detection plate (5) is arranged on one side of the fixing plate (4), and the width detection plate (5) is fixedly welded to one side of the fixing plate (4).

4. The asphalt composite rainwater collection road crack filling expansion amount detection device according to claim 3, characterized in that: On both sides of the upper end of the first device housing (1), clamping handles (13) are provided, and the lower ends of the two clamping handles (13) are fixedly connected to the upper end of the first device housing (1).

5. The usage method of the asphalt composite rainwater collection road crack filling expansion amount detection device based on claim 4, characterized in that: The method includes the following steps: Step 1: The embedding depth detection rod (2) is vertically oriented towards the position to be detected, and is pressed towards the position to be detected, so that the embedding depth detection rod (2) is embedded into the caulking, and fits against the upper end of the outside of the caulking. With continuous pressing during the embedding, the embedding depth detection rod (2) extends into the first device housing (1); Step 2: Press vertically until the lower end of the fixed piece (3) outside the first device housing (1) fits against the surface of the asphalt composite rainwater collection road. During the pressing process, the sealing push piece (28) at one end of the embedding depth detection rod (2) moves longitudinally upwards in the first air storage cavity (20). The upward movement can push the air inside the first air storage cavity (20), and the squeezed air is discharged through the second exhaust check valve (14), while the outside air can enter the second air storage cavity (22) through the third exhaust check valve (15) to complete the filling of the second air storage cavity (22); Step 3: The air inside the second air storage cavity (22) and the first air storage cavity (20) can complete the restriction of the sealing push piece (28), restricting and fixing the embedding depth of the embedding depth detection rod (2); Step 4: When pressing the first device housing (1) to make the lower end of the fixed piece (3) fit against the asphalt composite rainwater collection road, it will drive a number of size forming strips (19) arranged in an array at the lower end of the fixing plate (4) to contact the curved caulking, and the size forming strips (19) are restricted respectively by the concave and flat caulking and the asphalt composite rainwater collection road, restricting and pushing to make the size forming strips (19) at the corresponding positions embed into the second device housing (6); Step 5: The embedded size forming strips (19) will squeeze the third air storage cavity (23) inside the sealing filling block (7), so that the air inside the third air storage cavity (23) is discharged through the first exhaust check valve (12), and the discharged air makes the shape of the size forming strips (19) remain fixed; Step 6: Simulate the shape of the caulking through the depression, and refer to the width detection plate (5) to understand the different widths at different curved positions; Step 7: By taking out the sealing filling block (7) and pressing the first pulling handle (9), all the size forming strips (19) can be extended and reset; Step 8: Take out through the second pulling handle (16) from the second air flow ring (27), so that the outside air can enter the first air storage cavity (20) and the second air storage cavity (22) respectively, and the user manually pulls the embedding depth detection rod (2) to make it completely extend outside the first device housing (1) to complete the reset of the embedding depth detection rod (2).

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