Preventive maintenance structure for highway asphalt pavement

Abstract

The invention belongs to the technical field of asphalt pavement maintenance, and discloses a highway asphalt pavement preventive maintenance structure which comprises a spraying part, the upper end of the spraying part is communicated with a connector pipe in a penetrating mode, the upper end of the connector pipe is connected with a conveying pipe in a clamped mode, and the outer end of the conveying pipe is connected with an asphalt protection raw material; a vertical groove, a ring groove and a second clamping groove are formed in the inner wall of the connector pipe, a first clamping block is fixedly connected to the outer wall of the upper end of the conveying pipe, an extension ring is fixedly connected to the center of the upper end of the conveying pipe, and a ring piece is clamped into the conveying pipe; according to the device, asphalt maintenance liquid can be sprayed on roads with different widths, and the positions of second sliding blocks in second sliding grooves are adjusted through positioning grooves in different positions, so that the length of the exposed outer side end of an expansion piece is adjusted, namely the relative width between the expansion piece and a spraying piece assembly is adjusted, and the spraying effect is improved. Therefore, the spraying width of the device can adapt to roads with different widths.

Description

Technical Field

[0001] This application relates to the technical field of asphalt pavement maintenance, and more specifically, to a preventive maintenance structure for highway asphalt pavements. Background Art

[0002] An asphalt pavement is a pavement formed by paving and rolling asphalt concrete; preventive maintenance refers to taking certain measures in a planned manner for a pavement or its ancillary facilities with intact structures without increasing the bearing capacity of the pavement structure, so as to achieve the purpose of maintaining the pavement.

[0003] Currently, when spraying asphalt pavement maintenance agents on asphalt pavements, it is usually the case that a cart drags a maintenance agent tank in the front, and an operator holds a nozzle in the back, and then the operator holds the nozzle and continuously moves it horizontally to achieve full spraying of the asphalt pavement. However, an asphalt pavement is not just ten or twenty meters long. To complete the spraying of the entire asphalt pavement, the overall workload is huge and the spraying work intensity is high. If a row of spraying pipes is used to spray the asphalt pavement, the connection between the spraying parts and the asphalt storage parts is easily solidified by the asphalt maintenance liquid, thus affecting the normal flow of asphalt in the pipeline. If the pipeline connection is disassembled to clean the inner wall of the asphalt, the connection pipeline is prone to leakage of the asphalt maintenance liquid during the cleaning process. Moreover, since the widths of roads are different, if only roads of the same width can be sprayed with asphalt maintenance liquid, more working time will be increased when encountering wider roads.

[0004] To solve the above problems, this application provides a preventive maintenance structure for highway asphalt pavements. Summary of the Invention

[0005] A preventive maintenance structure for highway asphalt pavements provided by this application adopts the following technical solutions:

[0006] A preventive maintenance structure for a highway asphalt pavement, including a spraying member. Both sides of the upper end of the spraying member are provided with through grooves. One side of the through groove is provided with a first sliding groove, and the other side of the through groove is penetrated and provided with a second sliding groove. A hose is fixedly connected to the upper end of the spraying member. The upper end of the spraying member is penetrated and communicated with a joint pipe. A conveying pipe is clamped to the upper end of the joint pipe. The outer end of the conveying pipe is connected with an asphalt protection raw material. The outer surface of the upper end of the joint pipe is provided with a first clamping groove. Vertical grooves, annular grooves and second clamping grooves are provided on the inner wall of the joint pipe. A first clamping block is fixedly connected to the outer wall of the upper end of the conveying pipe. An extension ring is fixedly connected to the central position of the upper end of the conveying pipe. A ring member is clamped inside the conveying pipe. One end of the ring member is rotatably connected with a rotating block. An expansion member is slidably connected to the inner wall of the through groove. A vertical rod is slidably connected to the upper end of the spraying member. A first sliding block is fixedly connected to one side of the expansion member. A second sliding block is fixedly connected to the other side of the expansion member. An auxiliary disc is fixedly connected to the lower end of the vertical rod. A blocking disc is fixedly connected to the upper end of the vertical rod.

[0007] Further, a second clamping block is provided on the outer surface of the extension ring, and a groove is provided on the inner wall of the extension ring.

[0008] Through the above technical solution, the extension ring is used to be connected inside the joint pipe, and the second clamping block is used to limit the extension ring inside the joint pipe.

[0009] Further, the first clamping block is slidably clamped and connected with the first clamping groove, the second clamping block is slidably connected with the vertical groove, the second clamping block is rotatably connected with the annular groove, and the second clamping block is slidably clamped and connected with the second clamping groove.

[0010] Through the above technical solution, the second clamping block is used to limit the second clamping block in the second clamping groove.

[0011] Further, a first sector plate is fixedly connected to the inner wall of the ring member, a convex block is fixedly connected to the outside of the ring member, the convex block is slidably clamped and connected with the groove, a round block is fixedly connected to the inner wall of the first sector plate, a round groove is provided at one end of the round block, a limiting groove is provided on the inner wall of the round groove, and a motor is provided on the inner wall of the limiting groove.

[0012] Through the above technical solution, the convex block is used to fix the ring member inside the conveying pipe, and the first sector plate is used to block the space inside the conveying pipe.

[0013] Further, a second sector plate is fixedly connected to the outer surface of the lower end of the rotating block, a limiting disc is fixedly connected to the upper end of the rotating block, and a rotating rod is fixedly connected to the upper end of the limiting disc.

[0014] Through the above technical solution, the second sector plate is also used to block the space inside the conveying pipe, and the limiting plate is used to limit the rotating block inside the circular groove.

[0015] Furthermore, the outer wall of the second fan-shaped plate is attached to the inner wall of the conveying pipe, the upper end of the second fan-shaped plate is attached to the lower end of the first fan-shaped plate, the upper end of the rotating block is rotatably connected to the circular groove, the limiting plate is rotatably engaged with the limiting groove, and the rotating rod is fixedly connected to the output end of the motor.

[0016] Through the above technical solution, the motor inside the ring is used to drive the second sector plate to rotate adjacent to the lower end of the first sector plate via the rotating rod and the rotating block.

[0017] Furthermore, an auxiliary groove is provided on the bottom wall of the first slide, a first notch is provided on the upper end of the spraying member, a second notch is provided on the top wall of the second slide, an auxiliary groove is also provided on the bottom wall of the second slide, the second notch is communicated with the first notch, and one end of the hose is fixedly connected to the upper end of the extension member.

[0018] Through the above technical solution, the existence of the first slide groove and the second slide groove is used to limit the extension piece, and the mutual cooperation between the auxiliary groove and the limit block is used to limit the first slider and the second slider to prevent the first slider from escaping from the first slide groove and the second slider from escaping from the second slide groove. The hose is used to transport the asphalt curing raw materials accumulated inside the spray piece to the interior of the extension piece.

[0019] Furthermore, the first slider is slidably connected to the first slide groove, the second slider is slidably connected to the second slide groove, the upper end of the second slider is evenly provided with positioning grooves, the positioning grooves are correspondingly connected to the first notch, the inner lower end of the second slider is fixedly connected to a limiting block, the inner outer end of the second slider is fixedly connected to a handle, and the inner lower end of the first slider is also fixedly connected to a limiting block.

[0020] Through the above technical solution, the mutual cooperation between the first slider and the second slider is used to limit the extension piece to the through groove in the spray piece, and the connection between the positioning groove and the first notch is used to adjust the length of the outer end of the extension piece extending outward, that is, the length of the entire adjustment device.

[0021] Furthermore, the handle passes through the interior of the second slide groove, the handle is located on the outside of the spraying member, the limit block in the second slider is slidably connected to the auxiliary groove in the second slide groove, and the first slider in the first slider is slidably connected to the auxiliary groove in the first slide groove.

[0022] Through the above technical solution, the presence of the handle facilitates the movement of the second slider and the extension member inside the external moving device from the outside, that is, to adjust the length of the outer end of the extension member. The limiting block is used to limit the second slider to prevent the second slider from disengaging from the second chute, that is, to prevent the extension member from disengaging from the through slot in the spraying member.

[0023] Furthermore, a spring is fixedly connected to the upper end of the auxiliary disk, a pull rod is fixedly connected to the upper end of the retaining disk, the vertical rod passes through the inside of the first notch, the auxiliary disk is correspondingly engaged with the second notch, the upper end of the spring is fixedly connected to the top wall of the auxiliary slot, and the retaining disk is located above the spraying member.

[0024] Through the above technical solution, the combination of the vertical rod and the auxiliary disk is used to limit the second slider to prevent the second slider from continuously sliding in the second chute. The spring is used to push the auxiliary disk out of the second notch and into the positioning slot, and the retaining disk is used to prevent the vertical rod from continuously moving downward.

[0025] In summary, the present application includes the following beneficial technical effects:

[0026] 1. The present application can seal the output part of the delivery pipe to prevent the asphalt protection raw material externally connected to the delivery pipe from leaking through the delivery pipe after the extension ring in the delivery pipe is removed from the inside of the joint pipe. By adjusting the rotation of the second sector plate at the lower end of the first sector plate through the motor, the gap exposed by the first sector plate is adjusted, so as to form a seal on the inner wall of the delivery pipe to prevent the leakage of the asphalt protection raw material.

[0027] 2. The present application can spray the asphalt maintenance liquid on roads with different widths. By adjusting the position of the second slider in the second chute through the positioning slots at different positions, the length of the outer end of the extension member leaking out is adjusted, that is, the relative width between the extension member and the spraying member combination is adjusted, so that the spraying width of the device can adapt to roads with different widths. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the present application;

[0029] Figure 2 is a schematic diagram of the structure of the spraying member of the present application;

[0030] Figure 3 is a schematic diagram of the structure of the extension member of the present application;

[0031] Figure 4 is a schematic diagram of the structure of the vertical rod of the present application;

[0032] Figure 5 is a schematic diagram of the structure of the joint pipe of the present application;

[0033] Figure 6Schematic diagram of the conveying pipe structure of the present application;

[0034] Figure 7 Schematic diagram of the ring part and the rotating block structure of the present application;

[0035] Figure 8 For the present application Figure 2 Enlarged view of location A in

[0036] Description of reference numerals in the figure:

[0037] 1. Spraying part; 11. Through groove; 111. First sliding groove; 112. Auxiliary groove; 12. Second sliding groove; 121. First notch; 122. Second notch; 13. Hose; 2. Connector pipe; 21. First clamping groove; 22. Vertical groove; 23. Ring groove; 24. Second clamping groove; 3. Conveying pipe; 31. First clamping block; 32. Extension ring; 321. Second clamping block; 322. Groove; 33. Ring part; 331. Convex block; 332. First sector plate; 333. Round block; 3331. Round groove; 3332. Limit groove; 3333. Motor; 34. Rotating block; 341. Second sector plate; 342. Limit disk; 343. Rotating rod; 4. Expansion part; 41. First slider; 42. Second slider; 421. Positioning groove; 422. Limit block; 423. Handle; 5. Vertical rod; 51. Auxiliary disk; 511. Spring; 52. Stop disk; 521. Pull rod. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0039] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0040] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0041] Embodiment 1:

[0042] The embodiment of the present application discloses a preventive maintenance structure for highway asphalt pavement. Please refer to Figure 1 and Figures 5 - 7 , including a spraying member 1. The upper end of the spraying member 1 is penetrated and communicated with a joint pipe 2. The upper end of the joint pipe 2 is clamped with a conveying pipe 3. The outer end of the conveying pipe 3 is connected with an asphalt protection raw material. The outer surface of the upper end of the joint pipe 2 is provided with a first clamping groove 21. The inner wall of the joint pipe 2 is provided with a vertical groove 22, an annular groove 23 and a second clamping groove 24. The upper end outer wall of the conveying pipe 3 is fixedly connected with a first clamping block 31. The center position of the upper end of the conveying pipe 3 is fixedly connected with an extension ring 32. An annular member 33 is clamped inside the conveying pipe 3. One end of the annular member 33 is rotatably connected with a rotating block 34.

[0043] The outer surface of the extension ring 32 is provided with a second clamping block 321, and the inner wall of the extension ring 32 is provided with a groove 322.

[0044] The extension ring 32 is used to be connected inside the joint pipe 2, and the second clamping block 321 is used to limit the extension ring 32 inside the joint pipe 2.

[0045] The first clamping block 31 is slidably clamped and connected with the first clamping groove 21. The second clamping block 321 is slidably connected with the vertical groove 22, rotatably connected with the annular groove 23, and slidably clamped and connected with the second clamping groove 24.

[0046] The second clamping block 321 is used to limit the second clamping block 321 in the second clamping groove 24.

[0047] A first sector plate 332 is fixedly connected to the inner wall of the annular member 33. A convex block 331 is fixedly connected to the outside of the annular member 33. The convex block 331 is slidably clamped and connected with the groove 322. A round block 333 is fixedly connected to the inner wall of the first sector plate 332. One end of the round block 333 is provided with a round groove 3331. The inner wall of the round groove 3331 is provided with a limiting groove 3332. A motor 3333 is arranged on the inner wall of the limiting groove 3332.

[0048] The bump 331 is used to fix the ring 33 inside the conveying pipe 3, and the first sector plate 332 is used to block the space inside the conveying pipe 3.

[0049] A second sector plate 341 is fixedly connected to the outer surface of the lower end of the rotating block 34, a limiting disk 342 is fixedly connected to the upper end of the rotating block 34, and a rotating rod 343 is fixedly connected to the upper end of the limiting disk 342.

[0050] The second sector plate 341 is also used to block the space inside the conveying pipe 3, and the limiting disk 342 is used to limit the rotating block 34 inside the circular groove 3331.

[0051] The outer wall of the second sector plate 341 is attached to the inner wall of the conveying pipe 3, the upper end of the second sector plate 341 is attached to the lower end of the first sector plate 332, the upper end of the rotating block 34 is rotatably connected to the circular groove 3331, the limiting disk 342 is rotatably engaged with the limiting groove 3332, and the rotating rod 343 is fixedly connected to the output end of the motor 3333.

[0052] The motor 3333 inside the ring 33 is used to drive the second sector plate 341 to rotate attached to the lower end of the first sector plate 332 via the rotating rod 343 and the rotating block 34.

[0053] The implementation principle of this embodiment is as follows: When it is necessary to remove the conveying pipe 3 from the inside of the joint pipe 2, first control the motor 3333 to drive the limiting disk 342 to rotate inside the limiting groove 3332 via the rotating rod 343. At this time, the second sector plate 341 can be synchronously driven by the rotating block 34 to rotate attached to the lower end of the first sector plate 332 until the second sector plate 341 and the first sector plate 332 are completely misaligned, so that the gap between the second sector plate 341 and the first sector plate 332 is covered. At this time, it can prevent the asphalt protection raw material outside the conveying pipe 3 from leaking from the conveying pipe 3;

[0054] Then pull the conveying pipe 3 outwards to separate its first clamping block 31 from the first clamping groove 21, and during the outward movement of the conveying pipe 3, the second clamping block 321 will move upwards along the second clamping groove 24. Then rotate the conveying pipe 3 to drive the second clamping block 321 to rotate along the annular groove 23. Then pull the conveying pipe 3 outwards again to drive the second clamping block 321 to move outwards along the vertical groove 22, so that the extension ring 32 in the conveying pipe 3 is separated from the inside of the joint pipe 2.

[0055] Embodiment Two:

[0056] This application embodiment discloses a preventive maintenance structure for highway asphalt pavement. Please refer to Figures 1 - 4 and Figure 8, through grooves 11 are provided on both sides of the upper end of the spraying member 1, a first slide groove 111 is provided on one side of the through groove 11, and a second slide groove 12 is provided on the other side of the through groove 11, a hose 13 is fixedly connected to the upper end of the spraying member 1, an extension member 4 is slidably connected to the inner wall of the through groove 11, a vertical rod 5 is slidably connected to the upper end of the spraying member 1, a first slider 41 is fixedly connected to one side of the extension member 4, and a second slider 42 is fixedly connected to the other side of the extension member 4, an auxiliary plate 51 is fixedly connected to the lower end of the vertical rod 5, and a baffle plate 52 is fixedly connected to the upper end of the vertical rod 5.

[0057] An auxiliary groove 112 is provided on the bottom wall of the first slide groove 111, a first notch 121 is provided on the upper end of the spraying member 1, a second notch 122 is provided on the top wall of the second slide groove 12, an auxiliary groove 112 is also provided on the bottom wall of the second slide groove 12, the second notch 122 is communicated with the first notch 121, and one end of the hose 13 is fixedly connected to the upper end of the extension member 4.

[0058] Through the above technical solution, the existence of the first slide groove 111 and the second slide groove 12 is used to limit the extension member 4, and the mutual cooperation between the auxiliary groove 112 and the limit block 422 is used to limit the first slider 41 and the second slider 42 to prevent the first slider 41 from escaping from the first slide groove 111 and the second slider 42 from escaping from the second slide groove 12. The hose 13 is used to transport the asphalt curing raw materials accumulated inside the spraying member 1 to the inside of the extension member 4.

[0059] Furthermore, the first slider 41 is slidably connected to the first slide groove 111, the second slider 42 is slidably connected to the second slide groove 12, the upper end of the second slider 42 is evenly provided with positioning grooves 421, the positioning grooves 421 are correspondingly connected to the first slot 121, the inner lower end of the second slider 42 is fixedly connected to the limiting block 422, the inner outer end of the second slider 42 is fixedly connected to the handle 423, and the inner lower end of the first slider 41 is also fixedly connected to the limiting block 422.

[0060] Through the above technical solution, the mutual cooperation between the first slider 41 and the second slider 42 is used to limit the extension piece 4 to the through groove 11 in the spray piece 1, and the connection between the positioning groove 421 and the first notch 121 is used to adjust the length of the outer end of the extension piece 4 extending outward, that is, the length of the entire adjusting device.

[0061] Furthermore, the handle 423 passes through the interior of the second slide groove 12, the handle 423 is located on the outside of the sprayer 1, the limit block 422 in the second slider 42 is slidably connected to the auxiliary groove 112 in the second slide groove 12, and the first slider 41 in the first slider 41 is slidably connected to the auxiliary groove 112 in the first slide groove 111.

[0062] Through the above technical solution, the presence of the handle 423 facilitates the movement of the second slider 42 inside the external moving device and the extension member 4, that is, to adjust the length of the outer end of the extension member 4 extending. The limiting block 422 is used to limit the second slider 42 to prevent the second slider 42 from disengaging from the second chute 12, that is, to prevent the extension member 4 from disengaging from the through groove 11 in the spraying member 1.

[0063] Furthermore, a spring 511 is fixedly connected to the upper end of the auxiliary disk 51, a pull rod 521 is fixedly connected to the upper end of the retaining disk 52, the vertical rod 5 passes through the inside of the first notch 121, the auxiliary disk 51 is correspondingly engaged with the second notch 122, the upper end of the spring 511 is fixedly connected to the top wall of the auxiliary groove 112, and the retaining disk 52 is located above the spraying member 1.

[0064] Through the above technical solution, the combination of the vertical rod 5 and the auxiliary disk 51 is used to limit the second slider 42 to prevent the second slider 42 from continuously sliding in the second chute 12. The spring 511 is used to push the auxiliary disk 51 out of the second notch 122 and into the positioning groove 421, and the retaining disk 52 is used to prevent the vertical rod 5 from continuously moving downward.

[0065] The implementation principle of this embodiment is as follows: When it is necessary to adjust the spraying width for the preventive maintenance of the asphalt pavement, first pull up the pull rod 521 to drive the auxiliary disk 51 to move upward via the vertical rod 5 until the auxiliary disk 51 disengages from the positioning groove 421 and enters the second notch 122. At this time, the auxiliary disk 51 will not affect the smoothness of the top wall of the second chute 12, and the upward movement of the auxiliary disk 51 will compress the spring 511. Then, the handle 423 can be horizontally pushed to drive the second slider 42 to slide along the second chute 12. After adjusting the exposed position of the outer side of the extension member 4 to a suitable position and adjusting the corresponding positioning groove 421 to directly below the first notch 121, the pull rod 521 can be released at this time. At this time, the compression force received by the spring 511 disappears, and the spring 511 will push the auxiliary disk 51 to move downward. At this time, the auxiliary disk 51 will drive the vertical rod 5 to move downward along the first notch 121 to push the auxiliary disk 51 out of the second notch 122 and into the positioning groove 421 at this position. At this time, under the action of the auxiliary disk 51 and the vertical rod 5, the second slider 42 can be fixed in the second chute 12 to prevent the extension member 4 from accidentally sliding. Then, the highway can be sprayed with the maintenance liquid via the extension member 4 and the spraying member 1.

[0066] The above are all the preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A preventive maintenance structure for highway asphalt pavement, including a spraying component (1), characterized in that: Both sides of the upper end of the spraying member (1) are provided with through grooves (11). One side of the through groove (11) is provided with a first sliding groove (111), and the other side of the through groove (11) is provided with a second sliding groove (12) penetrating through. The upper end of the spraying member (1) is fixedly connected with a hose (13). The upper end of the spraying member (1) is penetrated and communicated with a joint pipe (2). The upper end of the joint pipe (2) is clamped with a conveying pipe (3). The outer end of the conveying pipe (3) is connected with an asphalt protective raw material. The upper outer surface of the joint pipe (2) is provided with a first clamping groove (21). The inner wall of the joint pipe (2) is provided with a vertical groove (22), a ring groove (23) and a second clamping groove (24). The upper outer wall of the conveying pipe (3) is fixedly connected with a first clamping block (31). The central position of the upper end of the conveying pipe (3) is fixedly connected with an extension ring (32). A ring member (33) is clamped inside the conveying pipe (3). One end of the ring member (33) is rotatably connected with a rotating block (34). An expansion member (4) is slidably connected to the inner wall of the through groove (11). A vertical rod (5) is slidably connected to the upper end of the spraying member (1). One side of the expansion member (4) is fixedly connected with a first sliding block (41). The other side of the expansion member (4) is fixedly connected with a second sliding block (42). The lower end of the vertical rod (5) is fixedly connected with an auxiliary disc (51). The upper end of the vertical rod (5) is fixedly connected with a blocking disc (52).

2. The preventive maintenance structure for a highway asphalt pavement according to claim 1, characterized in that: The outer surface of the extension ring (32) is provided with a second clamping block (321). The inner wall of the extension ring (32) is provided with a groove (322).

3. A preventive maintenance structure for a highway asphalt pavement according to claim 2, characterized in that: The first clamping block (31) is slidably and clampingly connected with the first clamping groove (21). The second clamping block (321) is slidably connected with the vertical groove (22). The second clamping block (321) is rotatably connected with the ring groove (23). The second clamping block (321) is slidably and clampingly connected with the second clamping groove (24).

4. A preventive maintenance structure for a highway asphalt pavement according to claim 2, characterized in that: A first sector plate (332) is fixedly connected to the inner wall of the ring member (33). A convex block (331) is fixedly connected to the outside of the ring member (33). The convex block (331) is slidably and clampingly connected with the groove (322). A round block (333) is fixedly connected to the inner wall of the first sector plate (332). A round groove (3331) is opened at one end of the round block (333). A limiting groove (3332) is opened on the inner wall of the round groove (3331). A motor (3333) is arranged on the inner wall of the limiting groove (3332).

5. A preventive maintenance structure for a highway asphalt pavement according to claim 1, characterized in that: A second sector plate (341) is fixedly connected to the lower outer surface of the rotating block (34). A limiting disc (342) is fixedly connected to the upper end of the rotating block (34). A rotating rod (343) is fixedly connected to the upper end of the limiting disc (342).

6. A preventive maintenance structure for a highway asphalt pavement according to claim 5, characterized in that: The outer wall of the second sector plate (341) is attached to the inner wall of the conveying pipe (3). The upper end of the second sector plate (341) is attached to the lower end of the first sector plate (332). The upper end of the rotating block (34) is rotatably connected to the circular groove (3331). The limiting disc (342) is rotatably and engagingly connected to the limiting groove (3332). The rotating rod (343) is fixedly connected to the output end of the motor (3333).

7. A preventive maintenance structure for a highway asphalt pavement according to claim 1, characterized in that: An auxiliary groove (112) is formed in the bottom wall of the first sliding groove (111). A first notch (121) is formed in the upper end of the spraying member (1). A second notch (122) is formed in the top wall of the second sliding groove (12). An auxiliary groove (112) is also formed in the bottom wall of the second sliding groove (12). The second notch (122) communicates with the first notch (121). One end of the hose (13) is fixedly connected to the upper end of the expansion member (4).

8. A preventive maintenance structure for a highway asphalt pavement according to claim 7, characterized in that: The first slider (41) is slidably connected to the first sliding groove (111). The second slider (42) is slidably connected to the second sliding groove (12). Positioning grooves (421) are evenly formed in the upper end of the second slider (42). The positioning grooves (421) communicate with the first notch (121) correspondingly. A limiting block (422) is fixedly connected to the lower end of the inner side of the second slider (42). A handle (423) is fixedly connected to the outer end of the inner side of the second slider (42). A limiting block (422) is also fixedly connected to the lower end of the inner side of the first slider (41).

9. A preventive maintenance structure for a highway asphalt pavement according to claim 8, characterized in that: The handle (423) passes through the inside of the second sliding groove (12). The handle (423) is located outside the spraying member (1). The limiting block (422) in the second slider (42) is slidably connected to the auxiliary groove (112) in the second sliding groove (12). The first slider (41) in the first slider (41) is slidably connected to the auxiliary groove (112) in the first sliding groove (111).

10. A preventive maintenance structure for a highway asphalt pavement according to claim 7, characterized in that: A spring (511) is fixedly connected to the upper end of the auxiliary disc (51). A pull rod (521) is fixedly connected to the upper end of the blocking disc (52). The vertical rod (5) passes through the inside of the first notch (121). The auxiliary disc (51) is correspondingly engaged with the second notch (122). The upper end of the spring (511) is fixedly connected to the top wall of the auxiliary groove (112). The blocking disc (52) is located above the spraying member (1).

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