A municipal road asphalt pavement spraying device and spraying method

Abstract

This invention belongs to the field of asphalt pavement construction technology, and particularly relates to an asphalt pavement spraying device and spraying method for municipal roads. It includes a vehicle frame and an asphalt storage tank mounted on top of the frame. An adaptive spray volume component uses a pressure sensor to detect pressure changes in real time as the auxiliary frame extends. The controller adjusts the pressure regulating valve accordingly, ensuring that the spray volume of the auxiliary injector precisely changes with the extension width. Simultaneously, a variable diameter orifice-enlarging component, through mechanical transmission, increases the exposed area of ​​the spray holes as the extension distance increases. Combined with the symmetrical flow diversion and graded flow regulation design of the grouped input holes, it ensures a constant spray volume per unit area under different widths, solving the problem of uneven spraying in traditional devices. This invention sets the distance between the end of the adjusting seat away from the main frame and the main injector at the end of the main frame to half the distance between adjacent main injectors, making the spray areas of the main injector and auxiliary injector independent. This structural design avoids area overlap and effectively prevents excessive local asphalt deposition.

Description

Technical Field

[0001] This invention belongs to the field of asphalt pavement construction technology, and particularly relates to an asphalt pavement spraying device and spraying method for municipal roads. Background Technology

[0002] Asphalt pavement refers to a pavement structure formed by mixing asphalt materials (such as petroleum asphalt, coal tar pitch, etc.) with mineral aggregates (crushed stone, sand, mineral powder, etc.) in a certain proportion and then paving and compacting it. It is one of the most commonly used pavement types in road engineering. Asphalt mixtures have a certain strength and elasticity, can withstand vehicle loads, and rainwater can directly seep into the drainage layer below through the pores of the asphalt pavement and then be discharged through transverse drainage pipes. It is suitable for rainy areas.

[0003] Existing methods for paving asphalt roads typically include asphalt pavers, asphalt sprayers, and road rollers. An asphalt sprayer is a specialized road construction device for spraying liquid asphalt. It includes an asphalt tank, a heating system, an asphalt delivery system, spraying pipelines, and nozzles. The asphalt sprayer heats solid or semi-solid asphalt to a liquid state using the heating system, then uses an asphalt pump to pressurize and deliver it to the spraying pipelines and nozzles. The asphalt is atomized or sprayed in a fan shape at a set flow rate and pressure, evenly covering the road surface to form a thin, continuous asphalt layer. The asphalt sprayer works before the paver, spraying a bonding layer on the base course or existing pavement. The paver then lays the hot-mix asphalt mixture, and the road roller follows closely, compacting the surface to ensure a strong bond between the asphalt layer and the aggregate.

[0004] The current emulsified asphalt spraying device has a core structure including a trolley, a storage tank, and a spraying frame assembly. The main supply pipe (fixed at the bottom of the spraying frame) and the auxiliary supply pipe (slidably connected to the main supply pipe via a second telescopic drive component) form a width-adjustable spraying system. The main nozzles and auxiliary nozzles are arranged at equal intervals at the bottom of the two components. The emulsified asphalt is delivered to the nozzles by a power pump to achieve the spraying operation. However, this spraying method has defects during use: because the auxiliary supply pipe is symmetrically installed on both sides of the main supply pipe, the spacing between the main nozzles on the main supply pipe remains unchanged. When adjusting the spraying width, the auxiliary supply pipe extends outward on one side of the main supply pipe, and the spraying areas between the main nozzle at the end of the main supply pipe and the corresponding auxiliary nozzle on the auxiliary supply pipe overlap, causing excessive local asphalt deposition. Secondly, when the device is closed, the nozzles are usually exposed, making them prone to accumulating dust and debris when idle. This not only clogs the nozzles and affects the smoothness of subsequent spraying operations, but also may cause uneven spraying of emulsified asphalt due to impurities, further reducing construction efficiency and quality. Summary of the Invention

[0005] In view of this, the present invention aims to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] This invention discloses an asphalt pavement spraying device for municipal roads, including a vehicle frame and an asphalt storage tank installed on the top of the vehicle frame. A spraying frame is provided on one side of the vehicle frame, and a main frame that moves up and down is provided on one side of the spraying frame. Auxiliary frames that move back and forth are provided at the front and rear ends of the main frame. A main injector is provided on one side of the main frame, and an auxiliary injector is provided on one side of the auxiliary frame. The asphalt storage tank is connected to the main injector and the auxiliary injector respectively through an output pipe.

[0008] An adaptive injection volume component, which is mounted on the auxiliary frame, is used to adjust the injection volume of the auxiliary injector to gradually increase as the auxiliary frame moves outward.

[0009] The automatic opening and closing assembly, located inside the main frame, can automatically close the openings of the main injector and auxiliary injector when the device is in the closed state, preventing them from being exposed.

[0010] Preferably, the adaptive injection volume component includes:

[0011] The adjustment seats are arranged in a rectangular shape, and there are two of them, which are symmetrically located at the front and rear ends of the main frame. The two adjustment seats have sliding grooves on their opposite sides.

[0012] An adjusting cylinder, one end of which is slidably connected to a groove in an adjusting seat, and at least one auxiliary injector, which is installed below the adjusting cylinder. The distance between the point on the adjusting seat furthest from the main frame and the main injector at the end of the main frame is half the distance between adjacent main injectors.

[0013] The injection port is located below the regulating cylinder and corresponds to the auxiliary injector;

[0014] The spraying assembly is installed on top of the regulating cylinder and connected to the output pipe of the asphalt storage tank. The spraying assembly is slidably connected on top of the regulating seat.

[0015] The baffle plate is installed in the groove below the adjusting seat and is slidably connected to the outside of the adjusting cylinder;

[0016] The telescopic spring rod is installed inside the adjusting seat;

[0017] The pressure plate is installed on the moving end of the telescopic spring rod and is fixedly connected to the end of the adjusting cylinder that extends into the slide groove.

[0018] The variable diameter orifice-increasing assembly, located inside the adjusting cylinder, is used to linearly increase the number of auxiliary injectors as the auxiliary frame extends outwards with its displacement.

[0019] Preferably, a main limiting cover is installed below the main frame, and a secondary limiting cover is installed below the auxiliary frame, which is slidably connected to the front and rear ends of the main limiting cover. The main limiting cover and the secondary limiting cover are in the shape of a shape, and the two vertical ends of the shape are arranged in an outward expansion manner.

[0020] Preferably, the injection base is provided with two input holes, which are connected to auxiliary injectors. There are twenty auxiliary injectors, and every ten auxiliary injectors are connected through one input hole. The input hole is located in the middle of the ten auxiliary injectors.

[0021] Preferably, the injection volume of the ten auxiliary injectors is equal to the injection volume of the main injector on the main frame.

[0022] Preferably, the variable diameter orifice-enlarging assembly includes:

[0023] A variable diameter baffle, the variable diameter baffle being arc-shaped in general, is used to block the injection hole, and the inside of the adjusting cylinder is provided with a rotating groove for the variable diameter baffle to rotate;

[0024] A drive plate is installed at the end of the variable diameter baffle away from the adjusting seat, and the drive plate is rotatably connected to the end of the adjusting cylinder away from the adjusting seat.

[0025] There are two gear disks, which are different in size and are rotatably connected at the end of the secondary limiting cover away from the main limiting cover. The two gear disks mesh with each other, and the larger gear disk is fixedly connected to the drive rotating plate.

[0026] The drive rod has one end passing through the secondary limit cover and fixedly connected to the small gear disk, and the other end has a limit groove opened along the axial direction. The side wall of the adjustment seat is equipped with a fixed seat, and the middle position of the drive rod is slidably connected in the fixed seat.

[0027] The movable seat is connected to the side wall of the adjusting seat via a slide rail, and a linkage groove is provided inside it.

[0028] There are two bevel gears that mesh vertically with each other. The two bevel gears are rotatably connected in the linkage groove, and one of them is slidably connected to the limiting groove of the drive rod at the vertical end.

[0029] The driven gear is rotatably connected to the lower part of the moving base, and is fixedly connected to another bevel gear with a horizontal end via a connecting shaft;

[0030] The rack plate is installed below the side wall of the adjusting seat and meshes with the driven gear.

[0031] Preferably, the automatic opening and closing component includes:

[0032] A concave seat is installed at the horizontal end of the main limiting cover. The concave seat has a through hole corresponding to the main injector. A reset groove is provided on one side of the through hole in the concave seat.

[0033] At least one opening and closing plate is slidably connected inside the concave seat and is used to adjust the opening and closing of the through hole;

[0034] A connecting plate, which is fixedly connected to multiple opening and closing plates;

[0035] A passive plate, which has a shaped structure and is mounted on a connecting plate, wherein the vertical end of the passive plate and the drive rod are located on the same horizontal plane;

[0036] A limit plate is installed below the opening and closing plate;

[0037] The first reset spring rod is installed inside the reset groove, and the limiting plate is slidably connected inside the first reset spring rod.

[0038] Preferably, a slide rail groove is provided on one side of the connecting plate, the horizontal end of the passive plate is slidably connected in the slide rail groove, and a second reset spring rod that is slidably connected to the horizontal end of the passive plate is installed in the slide rail groove.

[0039] A spraying method for asphalt pavement distribution devices on municipal roads, the specific steps of which are as follows:

[0040] First: Start the first electric actuator to move the main frame up and down along the spray frame to the working height, then start the second electric actuator to push the auxiliary frame to extend outward in the opposite direction of the main frame and drive the adaptive spray volume component and the automatic opening and closing component to adjust the spray width.

[0041] Second: During the extension of the auxiliary frame, the main spraying seat extends out of the adjusting seat along with the output pipe, the adjusting cylinder slides in the slide groove, the telescopic spring rod is stretched, and the pressure sensor on the pressure plate detects the pressure change.

[0042] Third: The pressure sensor transmits data to the controller. The controller determines the degree of outward extension of the auxiliary frame and the number of exposed auxiliary injectors based on the pressure, and controls the pressure regulating valve on the auxiliary injector. The greater the outward extension distance, the higher the spray volume.

[0043] Fourth: The outward extension of the auxiliary frame drives the sliding seat to slide, and the driven gear rolls on the rack plate. Through the transmission of bevel gear and gear disc, the variable diameter baffle rotates, gradually increasing the exposed area of ​​the injection hole.

[0044] Fifth: When the auxiliary frame is reset to the main frame, the drive rod pushes the passive plate. When the passive plate moves, it drives the opening and closing plate to cover the through hole corresponding to the main injector through the connecting plate. At the same time, the auxiliary injector retracts and the adjustment seat is blocked by the baffle plate, and the automatic opening and closing component is reset.

[0045] Sixth: The auxiliary frame extends outward, causing the drive rod to disengage from the passive plate. The first reset spring rod pushes the opening and closing plate to reset, the through hole corresponding to the main injector opens, and the injection base extends outward. The baffle plate and the adjusting cylinder slide in coordination, the extended auxiliary injector is exposed and the corresponding injection hole is opened, and the main injector and the exposed auxiliary injector resume injection synchronously.

[0046] Seventh: When only the main injector needs to be used in a narrow area, the passive plate can be manually pushed to overcome the resistance of the second reset spring rod, causing it to disengage from the drive rod. The first reset spring rod will then quickly open the opening and closing plate, allowing the main injector to work independently.

[0047] Compared with existing technologies, the municipal road asphalt pavement spraying device and spraying method described in this invention have the following advantages:

[0048] 1. This invention uses an adaptive spray volume component to detect pressure changes in real time during the extension of the auxiliary frame via a pressure sensor. The controller adjusts the pressure regulating valve accordingly, ensuring that the spray volume of the auxiliary injector changes precisely with the extension width. Simultaneously, the variable diameter orifice expansion component, through mechanical transmission, increases the exposed area of ​​the spray holes as the extension distance increases. Combined with the symmetrical flow diversion and graded flow regulation design of the group input holes, it ensures a constant spray volume per unit area under different widths, solving the problem of uneven spraying in traditional devices. This invention sets the distance between the end of the adjusting seat away from the main frame and the main injector at the end of the main frame to half the distance between adjacent main injectors, making the spray areas of the main injector and the auxiliary injector independent. The structural design avoids area overlap, effectively preventing excessive local asphalt deposition and improving paving quality.

[0049] 2. The present invention uses an automatic opening and closing assembly. When the device is closed, the auxiliary frame resets and drives the drive rod to push the passive plate, so that the opening and closing plate covers the through hole of the main injector. The auxiliary injector retracts and is blocked by the shielding plate, achieving double sealing to prevent impurities from entering and asphalt from condensing and clogging. At the same time, the sliding of the opening and closing plate can remove asphalt residue at the edge of the through hole, further improving the anti-clogging effect and ensuring smooth subsequent operations. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0051] Figure 2 yes Figure 1 A magnified view of part A in the image;

[0052] Figure 3 This is a schematic diagram of the main limiting cover and the secondary limiting cover of the present invention;

[0053] Figure 4 This is a schematic diagram of the adjusting cylinder of the present invention;

[0054] Figure 5 This is a schematic diagram of the adjustment seat of the present invention;

[0055] Figure 6 This is a schematic diagram of the adaptive injection volume component of the present invention;

[0056] Figure 7 This is an exploded view of the adjusting cylinder and the variable diameter baffle of the present invention;

[0057] Figure 8 This is a schematic diagram of the variable diameter orifice-enhancing component of the present invention;

[0058] Figure 9 This is a longitudinal cross-sectional view of the movable seat of the present invention;

[0059] Figure 10 yes Figure 8 A magnified view of part B in the image;

[0060] Figure 11 This is a schematic diagram of the automatic opening and closing component of the present invention;

[0061] Figure 12 This is a schematic diagram of the opening and closing plate of the present invention;

[0062] Figure 13 yes Figure 11 A magnified view of part C.

[0063] The markings in the diagram are as follows:

[0064] 1. Vehicle frame; 12. Asphalt storage tank; 13. Spraying frame; 14. Main frame; 15. Auxiliary frame; 16. Main sprayer; 17. Auxiliary sprayer;

[0065] 2. Adaptive injection volume assembly; 21. Adjusting seat; 22. Adjusting cylinder; 220. Rotating groove; 23. Injection hole; 24. Injection assembly; 240. Input hole; 25. Baffle plate; 26. Telescopic spring rod; 27. Pressure plate; 28. Main limit cover; 29. ​​Secondary limit cover; 210. Through hole; 211. Variable diameter hole-increasing assembly; 212. Variable diameter baffle plate; 213. Drive rotating plate; 214. Gear disk; 215. Drive rod; 216. Moving seat; 217. Bevel gear; 218. Driven gear; 219. Rack plate;

[0066] 3. Automatic opening and closing assembly; 31. Concave seat; 32. Opening and closing plate; 321. Limiting plate; 322. First reset spring rod; 33. Connecting plate; 34. Passive plate; 35. Second reset spring rod. Detailed Implementation

[0067] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0068] See Figures 1-4 As shown, this invention provides a municipal road asphalt pavement spraying device for spraying liquid or semi-liquid materials such as asphalt, emulsified asphalt, or drainage asphalt binder. It includes a frame 1 and an asphalt storage tank 12 mounted on top of the frame 1. A spraying frame 13 is provided on one side of the frame 1. A main frame 14 moves vertically along one side of the spraying frame 13. A first electric actuator is mounted on the spraying frame 13 to drive the main frame 14 vertically. Auxiliary frames 15, which move forward and backward, are provided at both ends of the main frame 14. Two second electric actuators are mounted on the main frame 14 to drive the relative movement of the auxiliary frames 15. This device achieves the vertical movement of the main frame 14 and the movement of the auxiliary frames 15 through the first and second electric actuators, respectively. The forward and backward movement of component 5 allows for flexible adjustment of the spraying height and width of the entire device. A main sprayer 16 is installed on one side of the main frame 14, and an auxiliary sprayer 17 is installed on one side of the auxiliary frame 15. The asphalt storage tank 12 is connected to the main sprayer 16 and the auxiliary sprayer 17 respectively through an output pipe. This device uses a first electric actuator to drive the main frame 14 to move up and down on the spraying frame 13 to achieve spraying height adjustment. Two second electric actuators drive the auxiliary frame 15 to move relative to the front and rear ends of the main frame 14 to achieve spraying width adjustment. The main sprayer 16 on the main frame 14 and the auxiliary sprayer 17 on the auxiliary frame 15 cooperate to flexibly adjust the spraying range according to the operation requirements. The electric control of the electric actuators achieves precise adjustment of height and width.

[0069] See Figures 3-7As shown, the adaptive spray volume assembly 2 is mounted on the auxiliary frame 15 and is used to gradually increase the spray volume of the auxiliary injector 17 when the auxiliary frame 15 moves outward. The adaptive spray volume assembly 2 includes: two cuboid adjustment seats 21, which are symmetrically arranged at the front and rear ends of the main frame 14, and the two adjustment seats 21 have grooves on their opposite sides; an adjustment cylinder 22, one end of which is slidably connected in the groove of the adjustment seat 21; at least one auxiliary injector 17 is provided and is installed below the adjustment cylinder 22; the distance between the end of the adjustment seat 21 away from the main frame 14 and the main injector 16 at the end of the main frame 14 is half the distance between adjacent main injectors 16. The system includes: a spray hole 23 located below the regulating cylinder 22 and corresponding to the auxiliary sprayer 17; a spray assembly 24 mounted on top of the regulating cylinder 22 and connected to the output pipe of the asphalt storage tank 12, the spray assembly 24 being slidably connected to the top of the regulating seat 21; a baffle plate 25 mounted in a groove below the regulating seat 21 and slidably connected to the outside of the regulating cylinder 22; a telescopic spring rod 26 mounted inside the regulating seat 21; a pressure plate 27 mounted on the moving end of the telescopic spring rod 26 and fixedly connected to one end of the regulating cylinder 22 that extends into the groove, a pressure sensor mounted on the pressure plate 27, and pressure regulating valves mounted on the main sprayer 16 and the auxiliary sprayer 17.

[0070] It should be noted that when carrying out asphalt pavement paving operations, the first electric actuator is activated first. Through the telescopic movement, the main frame 14 is moved up and down along the spray frame 13, so that the entire spraying system is adjusted to a suitable height to adapt to different road conditions and paving requirements. Then, the two second electric actuators installed on the main frame 14 are activated. These two second electric actuators will push the auxiliary frame 15 to extend outward in opposite directions along the main frame 14, thereby adjusting the spraying width of the entire device to meet the paving requirements of different road widths.

[0071] As the auxiliary frame 15 extends outward, the output pipe of the asphalt storage tank 12 connected to the auxiliary frame 15 also moves, thereby causing the injection base 24 installed on the top of the regulating cylinder 22 to extend out from the inside of the regulating base 21. During this process, the auxiliary injector 17, which was originally partially blocked by the baffle plate 25, is gradually exposed. The regulating base 21 is elongated and symmetrically distributed at the front and rear ends of the main frame 14. The sliding grooves opened on its opposite sides provide a track for the sliding of the regulating cylinder 22. Then, when the auxiliary injector 17 is gradually exposed and the regulating cylinder 22 moves, the telescopic spring rod 26 releases the spring potential energy and pushes the pressure plate 27 connected to it. The pressure sensor installed on the pressure plate 27 will detect the pressure change in real time. The pressure sensor transmits the detected data to the external controller, which pre-sets the correspondence between different pressure values ​​and the injection volume of the auxiliary injector 17.

[0072] Specifically, the controller analyzes data from the pressure sensor to determine the extent of the outward extension of the auxiliary frame 15 and the number of exposed auxiliary injectors 17. It then controls the pressure regulating valve on each auxiliary injector 17. Because the device is designed so that the longer the adjustable width, the longer the adjusting cylinder 22 extends inside the adjusting seat 21, resulting in more exposed auxiliary injectors 17, the more noticeable the pressure changes detected by the pressure sensor become. Based on these changes, the controller adjusts the pressure regulating valve to increase the pressure, thereby precisely adjusting the spray volume of the auxiliary injectors 17 according to the adjustable width. For example, when the outward extension of the auxiliary frame 15 is short and only a few auxiliary injectors 17 are exposed, the pressure detected by the pressure sensor is low, and the controller controls the pressure regulating valve to spray asphalt with a lower pressure. Conversely, when the outward extension of the auxiliary frame 15 is long and a large number of auxiliary injectors 17 are exposed, the pressure detected by the pressure sensor is high, and the controller controls the pressure regulating valve to increase the pressure, allowing the auxiliary injectors 17 to spray asphalt with a higher pressure, ensuring uniform asphalt spray volume per unit area.

[0073] It is worth noting that the distance between the end of the adjusting seat 21 furthest from the main frame 14 and the main injector 16 at the end of the main frame 14 is intentionally designed to be half the distance between adjacent main injectors 16. This ensures that the spraying area of ​​the main injector 16 at the end of the main frame 14 and the spraying area of ​​the auxiliary injector 17 on the adjusting cylinder 22 are independent during the entire spraying operation. This prevents the overlapping of spraying areas between the main nozzle at the end of the main supply pipe and the auxiliary nozzle of the auxiliary supply pipe, as is the case in traditional emulsified asphalt spraying devices, and effectively avoids the problem of excessive local asphalt deposition.

[0074] This invention, through the real-time detection of the pressure sensor of the adaptive spray volume component 2 and the dynamic adjustment mechanism of the pressure regulating valve, can accurately control the spray volume of the auxiliary sprayer 17 according to the actual width of the outward extension of the auxiliary frame 15, ensuring that the road surface per unit area can obtain uniform and appropriate emulsified asphalt spraying under different spray widths. This effectively solves the problem of uneven spraying caused by width adjustment in traditional devices and greatly improves the paving quality of asphalt pavement.

[0075] See Figures 2-3 As shown, a main limiting cover 28 is installed below the main frame 14, and a secondary limiting cover 29 is installed below the auxiliary frame 15, which is slidably connected to the front and rear ends of the main limiting cover 28. The main limiting cover 28 and the secondary limiting cover 29 are fixedly connected to the output pipe of the asphalt storage tank 12. The main limiting cover 28 and the secondary limiting cover 29 are fixedly connected to the main frame 14 and the auxiliary frame 15 respectively through connectors. The main limiting cover 28 and the secondary limiting cover 29 have a U-shaped structure, and the two vertical ends of the U-shaped structure are arranged in an outward expansion manner.

[0076] It should be noted that when the second electric actuator pushes the auxiliary frame 15 outward, the auxiliary frame 15 drives the secondary limiting cover 29 to move synchronously. Since the secondary limiting cover 29 slides with the main limiting cover 28, and the output pipe is fixed to both, the two secondary limiting covers 29 slide along the outer surface of the main limiting cover 28. Both the main limiting cover 28 and the secondary limiting cover 29 adopt a U-shaped structure, and the two vertical ends of the U-shape are arranged in an outward expanding manner (similar to a trumpet shape). Firstly, this structure will preferentially cut off the external airflow during the device's movement, making... High-speed airflow creates a swirling flow outside the limiting cover, preventing direct impact on the nozzle spray area. Secondly, it keeps the spray flow concentrated inside the limiting cover until it reaches the road surface, forming a uniform coating. Thirdly, this structure can reduce the accumulation of external dust inside the auxiliary injector 17. Moreover, when the device is activated, the auxiliary frame 15 extends outward, causing the secondary limiting cover 29 to slide. The sliding contact surface (the contact area between the main limiting cover 28 and the secondary limiting cover 29) is made of smooth metal material, and the accumulated dust will be removed by vibration during the sliding process.

[0077] See Figures 4-5 As shown, the injection base 24 is provided with two input holes 240, and the two input holes 240 are connected to the auxiliary injectors 17. There are twenty auxiliary injectors 17, and every ten auxiliary injectors 17 are connected through one input hole 240. The input hole 240 is located in the middle of the ten auxiliary injectors 17.

[0078] It should be noted that the inlet 240 is located in the middle of the ten auxiliary injectors 17. The principle of symmetrical flow division is used to make the emulsified asphalt flow distance from the inlet 240 to the auxiliary injectors 17 on both sides equal. Equal flow division can reduce the pressure loss deviation caused by the difference in pipe length and ensure that the asphalt flow obtained by each auxiliary injector 17 is consistent.

[0079] It is worth noting that the twenty auxiliary injectors 17 are divided into two groups (ten in each group), each connected through an independent input port 240. This grouping design can achieve "graded flow regulation". When the outward extension of the auxiliary frame 15 is small, only one group of auxiliary injectors 17 needs to work (corresponding to one input port 240 being open), reducing flow waste. When the outward extension is large, both groups of auxiliary injectors 17 work simultaneously (both input ports 240 being open), meeting the flow requirements for wide-width spraying. The device can maintain a constant spray volume per unit area under different widths, avoiding the problem of "the wider the width, the sparser the edge spraying" in traditional devices.

[0080] See Figures 3-4 As shown, the injection volume of the ten auxiliary injectors 17 is equal to the injection volume of the main injector 16 on the main frame 14.

[0081] It should be noted that the ten auxiliary injectors 17 are regarded as a modular flow unit, and their total injection volume is equal to that of a single main injector 16 (denoted as Q). This design makes the group of auxiliary injectors 17 functionally equivalent to an "extended main injector 16", which facilitates standardized control of the injection volume. The single-hole flow rate of each auxiliary injector 17 is Q / 10. When all ten auxiliary injectors 17 are open, the total flow rate is Q, which is equal to that of the main injector 16, thus improving the regional uniformity of the injection volume of the main injector 16 and the auxiliary injectors 17.

[0082] See Figures 7-10 As shown, it is installed inside the adjusting cylinder 22 to linearly increase the number of auxiliary injectors 17 as the auxiliary frame 15 extends outward. The variable diameter increasing hole assembly 211 includes: a variable diameter shield 212, which is arc-shaped and used to block the injection hole 23. The adjusting cylinder 22 has a rotating groove 220 for rotating the variable diameter shield 212; a drive rotating plate 213, which is installed at the end of the variable diameter shield 212 away from the adjusting seat 21 and is rotatably connected to the end of the adjusting cylinder 22 away from the adjusting seat 21; two gear disks 214 of different sizes, which are rotatably connected to the end of the secondary limiting cover 29 away from the main limiting cover 28 and mesh with each other. The larger gear disk 214 is fixedly connected to the drive rotating plate 213; and a drive rod 215, one end of which passes through the secondary limiting cover 29. The adjustment seat 21 is fixedly connected to the small gear disk 214. A limiting groove is opened at the other end along the axial direction. A fixed seat is installed on the side wall of the adjustment seat 21. The middle position of the drive rod 215 is slidably connected in the fixed seat. The moving seat 216 is connected to the side wall of the adjustment seat 21 through a slide rail. A linkage groove is opened inside. The moving seat 216 has an L-shaped structure. Its horizontal end is fixedly connected to the injection seat 24. There are two bevel gears 217, which are meshed vertically. The two bevel gears 217 are rotatably connected in the linkage groove. One of the vertical bevel gears 217 is slidably connected to the limiting groove of the drive rod 215. The driven gear 218 is rotatably connected below the moving seat 216. It is fixedly connected to the other horizontal bevel gear 217 through a connecting shaft. The rack plate 219 is installed below the side wall of the adjustment seat 21 and meshes with the driven gear 218.

[0083] It should be noted that when the auxiliary frame 15 extends outward, the injection assembly 24 moves synchronously along the adjusting seat 21 via the moving seat 216. The horizontal movement of the injection assembly 24 causes the driven gear 218 to roll on the fixed rack plate 219, converting linear motion into rotational motion. The driven gear 218 drives the horizontal bevel gear 217 to rotate coaxially. The axis of the horizontal bevel gear 217 is arranged horizontally and parallel to the outward direction (horizontal direction) of the auxiliary frame 15. It is connected to the driven gear 218 via a connecting shaft. A rigid connection is established, with the vertical bevel gear 217 arranged vertically, perpendicular to the horizontal plane, and intersecting the axis of the horizontal bevel gear at a 90° angle. This bevel gear 217 meshes with the vertical bevel gear 217, converting horizontal rotation into vertical rotation. The vertical bevel gear 217 is slidably connected to the drive rod 215 through a limiting groove, allowing axial sliding (to accommodate the displacement of the moving seat 216) while also transmitting torque to rotate the drive rod 215. The drive rod 215 drives the pinion 214 to rotate. Through the meshing of the large and small gears 214, the rotation of the high-speed pinion is converted into the rotation of the low-speed large gear, achieving torque amplification. According to the principle of gear ratio, as mentioned earlier, the drive rod 215 drives the pinion 214 to rotate, and then transmits the rotation to the large gear 214 through meshing. The pinion 214 has a smaller outer diameter and fewer teeth, directly meshing with the large gear 214. The large gear 214 has a larger outer diameter and more teeth, meshing directly with the pinion 214. Direct meshing, since the large gear disk 214 has more teeth than the small gear disk 214, the rotation speed of the large gear disk 214 will be significantly lower than that of the small gear disk 214, thus achieving the effect of "slow rotation". The large gear disk 214 drives the variable diameter baffle 212 to make arc motion in the rotating groove 220 through the drive plate 213, gradually exposing or blocking the spray hole 23. As the outward extension distance of the auxiliary frame 15 increases, the rotation angle of the variable diameter baffle 212 increases, the exposed area of ​​the spray hole 23 gradually expands, and the flow rate increases accordingly, adapting to the needs of long-distance and large-area spraying. When the outward extension of the auxiliary frame 15 increases the spraying width, the diameter of the spray hole 23 increases synchronously, keeping the asphalt spraying amount per unit area constant, avoiding the problem of insufficient edge spraying caused by the width expansion of traditional devices;

[0084] The pure mechanical transmission does not require electric or hydraulic drive. It uses the kinetic energy of the outward extension of the auxiliary frame 15 to directly drive the variable diameter cover plate 212. This design can save energy consumption and can still work stably in the absence of power, adapting to the needs of field construction.

[0085] The curved surface of the variable diameter baffle 212 and the rotating groove 220 are treated with Teflon coating to reduce the amount of asphalt residue. In the initial stage, the curved surface of the variable diameter baffle 212 completely covers the inside of the rotating groove 220 to prevent external dust from entering.

[0086] See Figures 11-12As shown, the automatic opening and closing assembly 3 is installed inside the main frame 14. When the device is in the closed state, it can automatically close the openings of the main injector 16 and the auxiliary injector 17 to prevent them from being exposed. The automatic opening and closing assembly 3 includes: a concave seat 31, which is installed at the horizontal end of the main limiting cover 28. The concave seat 31 has a through hole 210 corresponding to the main injector 16, and a reset groove is formed on one side of the through hole 210; and an opening and closing plate 32, of which there is at least one. A sliding connection is installed inside the concave seat 31 for adjusting the opening and closing of the through hole 210; a connecting plate 33 is fixedly connected to multiple opening and closing plates 32; a passive plate 34 has an L-shaped structure and is disposed on the connecting plate 33, with the vertical end of the passive plate 34 and the drive rod 215 located on the same horizontal plane; a limiting plate 321 is installed below the opening and closing plates 32; a first reset spring rod 322 is installed inside the reset groove, with the limiting plate 321 slidably connected within the first reset spring rod 322.

[0087] It should be noted that when the auxiliary frame 15 is reset to the main frame 14, the drive rod 215 moves synchronously with the secondary limit cover 29 and resets. At this time, the end of the drive rod 215 contacts the vertical end of the passive plate 34. Through mechanical extrusion, the passive plate 34 is pushed to move towards the concave seat 31. The passive plate 34 drives all the opening and closing plates 32 to slide in the concave seat 31 through the connecting plate 33, so that the opening and closing plates 32 cover the through hole 210, thereby sealing the opening of the main injector 16. At the same time, the auxiliary injector 17 retracts into the adjusting seat 21 along with the injection base 24 and is blocked by the baffle plate 25, realizing the double sealing of the main injector 16 and the auxiliary injector 17. In the closed state, the opening and closing plates 32 and the baffle plate 25 respectively seal the openings of the main injector 16 and the auxiliary injector 17, preventing asphalt condensation from clogging the nozzle or external dust and debris from entering. When the opening and closing plates 32 slide, the scraping structure on their edges can remove the asphalt residue on the edge of the through hole 210, avoiding scale buildup and further improving the anti-clogging effect.

[0088] When the auxiliary frame 15 extends outward to adjust its width, the drive rod 215 moves with the secondary limit cover 29 and disengages from the vertical end of the passive plate 34. At this time, the first reset spring rod 322 releases its elastic potential energy, pushing the limit plate 321 to drive the opening and closing plate 32 to slide towards the reset groove. The through hole 210 opens, and the main injector 16 resumes its injection function. At the same time, the injection base 24 extends outward with the auxiliary frame 15 to extend the adjustment seat 21. The baffle plate 25 slides relative to the adjustment cylinder 22, and the auxiliary injector 17 is exposed and begins to work, forming a linkage effect of "synchronous opening and closing of the main and auxiliary injectors 17". The opening and closing process relies entirely on the mechanical displacement trigger of the auxiliary frame 15, without the need for an additional power or hydraulic system, thus reducing energy consumption and failure points.

[0089] See Figures 12-13As shown, a slide rail groove is provided on one side of the connecting plate 33, and the horizontal end of the passive plate 34 is slidably connected in the slide rail groove. A second reset spring rod 35, which is slidably connected to the horizontal end of the passive plate 34, is installed in the slide rail groove.

[0090] It should be noted that when the adaptive spray volume component 2 is not used and only the main sprayer 16 is used for spraying, the operator can directly push the vertical end of the passive plate 34 to overcome the resistance of the second reset spring rod 35 and slide it into the slide rail groove. At this time, the vertical end of the passive plate 34 disengages from the contact position with the drive rod 215, releasing the mechanical lock. After the passive plate 34 disengages from the drive rod 215, the first reset spring rod 322 immediately releases its elastic potential energy, pushing the limit plate 321 to drive the connecting plate 33 and all opening and closing plates 32 to slide quickly, so that the through hole 210 is fully opened and the main sprayer 16 resumes its spraying function. When working in a narrow area, if the auxiliary frame 15 cannot be fully deployed, the operator can manually open some sprayers to achieve local spraying function and improve the adaptability of the equipment.

[0091] A spraying method for asphalt pavement distribution devices on municipal roads, the specific steps of which are as follows:

[0092] First: Start the first electric actuator to move the main frame 14 up and down along the spray frame 13 to the working height, then start the second electric actuator to push the auxiliary frame 15 outward along the opposite direction of the main frame and drive the adaptive spray volume component 2 and the automatic opening and closing component 3 to adjust the spray width.

[0093] Second: During the extension of the auxiliary frame 15, the injection base 24 extends out of the adjustment base 21 along with the output pipe, the adjustment cylinder 22 slides in the slide groove, the telescopic spring rod 26 is stretched, and the pressure sensor on the pressure plate 27 detects the pressure change.

[0094] Third: The pressure sensor transmits the data to the controller. The controller determines the degree of extension of the auxiliary frame 15 and the number of exposed auxiliary injectors (17) based on the pressure, and controls the pressure regulating valve on the auxiliary injector 17. The greater the extension distance, the higher the spray volume.

[0095] Fourth: The outward extension of the auxiliary frame 15 drives the sliding seat 216 to slide, the driven gear 218 rolls on the rack plate 219, and through the transmission of the bevel gear 217 and the gear disk 214, the variable diameter baffle 212 rotates, gradually expanding the exposed area of ​​the injection hole 23.

[0096] Fifth: When the auxiliary frame 15 is reset to the main frame 14, the drive rod 215 pushes the passive plate 34. When the passive plate 34 moves, it drives the opening and closing plate 32 to cover the through hole 210 corresponding to the main injector 16 through the connecting plate 33. At the same time, the auxiliary injector 17 retracts the adjusting seat 21 and is blocked by the blocking plate 25, and the automatic opening and closing assembly 3 is reset.

[0097] Sixth: The auxiliary frame 15 extends outward, causing the drive rod 215 to disengage from the passive plate 34. The first reset spring rod 322 pushes the opening and closing plate 32 to reset, the through hole 210 corresponding to the main injector 16 opens, and the injection base 24 extends outward. The baffle plate 25 slides in coordination with the adjusting cylinder 22, the extended auxiliary injector 17 is exposed and the corresponding injection hole 23 is opened. The main injector 16 and the exposed auxiliary injector 17 resume injection synchronously.

[0098] Seventh: When only the main injector 16 needs to be used in a narrow area, the passive plate 34 can be manually pushed to overcome the resistance of the second reset spring rod 35 and disengage it from the drive rod 215. The first reset spring rod 322 will then quickly open the opening and closing plate 32, allowing the main injector 16 to work independently.

[0099] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A municipal road asphalt pavement spraying device comprising a frame (1) and an asphalt storage barrel (12) mounted on the top of the frame (1), characterized in that The frame (1) is provided with a spraying frame (13) on one side, the spraying frame (13) is provided with a main frame (14) moving up and down on one side, the main frame (14) is provided with a secondary frame (15) moving forward and backward on both ends, the main frame (14) is provided with a main sprayer (16) on one side, the secondary frame (15) is provided with a secondary sprayer (17) on one side, and the storage asphalt barrel (12) is connected with the main sprayer (16) and the secondary sprayer (17) through output pipes respectively; An adaptive spraying amount assembly (2) is arranged on the secondary frame (15) and used for gradually increasing the spraying amount of the secondary sprayer (17) when the secondary frame (15) moves outward, the adaptive spraying amount assembly (2) comprises: Adjusting seats (21) in the shape of cuboids are arranged, the number of the adjusting seats (21) is two, and the adjusting seats (21) are symmetrically arranged on both ends of the main frame (14), and sliding grooves are formed in the opposite sides of the two adjusting seats (21); Adjusting cylinders (22) are slidably connected to the sliding grooves of the adjusting seats (21), the number of the secondary sprayers (17) is at least one, and the secondary sprayers (17) are arranged below the adjusting cylinders (22), the distance between the position point of the end of the adjusting seat (21) away from the main frame (14) and the main sprayer (16) at the end of the main frame (14) is half of the distance between adjacent main sprayers (16); Spraying holes (23) are formed in the lower part of the adjusting cylinder (22) and correspond to the secondary sprayers (17); A spraying total seat (24) is arranged on the top of the adjusting cylinder (22) and connected with the output pipes of the storage asphalt barrel (12), and the spraying total seat (24) is slidably connected to the top of the adjusting seat (21); A shielding plate (25) is arranged in the sliding groove below the adjusting seat (21) and slidably connected to the outside of the adjusting cylinder (22); A telescopic spring rod (26) is arranged in the adjusting seat (21); A pressure plate (27) is arranged at the moving end of the telescopic spring rod (26) and fixedly connected to the end of the adjusting cylinder (22) extending into the sliding groove; A variable-diameter and hole-increasing assembly (211) is arranged in the adjusting cylinder (22) and used for linearly increasing the working number of the secondary sprayers (17) along with the outward displacement of the secondary frame (15) during the outward movement of the secondary frame (15), and the rotating angle of the variable-diameter shielding plate (212) is increased along with the increase of the outward distance of the secondary frame (15), and the exposure area of the spraying hole (23) is gradually expanded; An automatic opening and closing assembly (3) is arranged in the main frame (14) and can automatically close the openings of the main sprayer (16) and the secondary sprayer (17) when the device is in the closed state, so as to prevent the openings from being exposed.

2. The municipal road asphalt pavement spreading device according to claim 1, characterized in that, A main limiting cover (28) is arranged below the main frame (14), a secondary limiting cover (29) is slidably connected to the main limiting cover (28) on both ends, the main limiting cover (28) and the secondary limiting cover (29) are in the shape of U, and the two vertical ends of the U-shaped structure are arranged in an outward expansion mode.

3. The municipal road asphalt pavement spreading device according to claim 2, characterized in that, The total spray seat (24) is provided with two input holes (240), the two input holes (240) are connected with auxiliary sprayers (17), the number of the auxiliary sprayers (17) is twenty, and every ten auxiliary sprayers (17) are connected with one input hole (240), and the input hole (240) is arranged at the middle part of the ten auxiliary sprayers (17).

4. The municipal road asphalt pavement spreading device according to claim 2, characterized in that, The spray amount of the ten auxiliary sprayers (17) is equal to the spray amount of the main sprayer (16) on the main frame (14).

5. The municipal road asphalt pavement spreading device according to claim 2, characterized in that, The variable-diameter hole-increasing assembly (211) comprises: A variable-diameter cover (212) is in an arc shape as a whole and is used for shielding the spray hole (23), and a rotating groove (220) for the rotation of the variable-diameter cover (212) is formed in the inside of the adjusting cylinder (22); A driving rotating plate (213) is installed at the end of the variable-diameter cover (212) away from the adjusting seat (21), and the driving rotating plate (213) is rotationally connected at the end of the adjusting cylinder (22) away from the adjusting seat (21); Two gear plates (214) are rotationally connected at the end of the auxiliary limiting cover (29) away from the main limiting cover (28), and the two gear plates (214) are engaged with each other, wherein the large gear plate (214) is fixedly connected with the driving rotating plate (213); One end of a driving rod (215) penetrates through the auxiliary limiting cover (29) and is fixedly connected with the small gear plate (214), and the other end of the driving rod (215) is provided with a limiting groove in the axial direction, a fixing seat is installed on the side wall of the adjusting seat (21), and the middle part of the driving rod (215) is slidingly connected in the fixing seat; A moving seat (216) is connected to the side wall of the adjusting seat (21) through a sliding rail, and a linkage groove is formed in the inside of the moving seat (216); Two bevel gears (217) are engaged with each other in a vertical manner, and the two bevel gears (217) are rotationally connected in the linkage groove, wherein one bevel gear (217) is slidingly connected with the limiting groove of the driving rod (215); A driven gear (218) is rotationally connected below the moving seat (216), and the driven gear (218) is fixedly connected with the other bevel gear (217) through a connecting shaft; A rack plate (219) is installed below the side wall of the adjusting seat (21) and is engaged with the driven gear (218).

6. The municipal road asphalt pavement spreading device according to claim 5, characterized in that, The automatic opening and closing assembly (3) comprises: A concave seat (31) is installed at the horizontal end of the main limiting cover (28), a through hole (210) corresponding to the main sprayer (16) is formed in the concave seat (31), and a reset groove is formed in one side of the concave seat (31) and located at the through hole (210); At least one opening and closing plate (32) is slidingly connected in the concave seat (31) and is used for adjusting the opening and closing of the through hole (210); A connecting plate (33) is fixedly connected with the plurality of opening and closing plates (32); A passive plate (34) is in an L-shaped structure and is arranged on the connecting plate (33), and the vertical end of the passive plate (34) is located on the same horizontal plane as the driving rod (215); A limiting plate (321) is installed below the opening and closing plate (32); A first reset spring rod (322) is installed inside the reset slot, and the limiting plate (321) is slidingly connected in the first reset spring rod (322).

7. The municipal road asphalt pavement spreading device according to claim 6, characterized in that, One side of the connecting plate (33) is provided with a sliding rail slot, and the horizontal end of the passive plate (34) is slidingly connected in the sliding rail slot. A second reset spring rod (35) slidingly connected with the horizontal end of the passive plate (34) is installed in the sliding rail slot.

8. A method of spraying with a municipal road asphalt pavement spreading device according to claim 7, characterized in that: The specific steps are as follows: S1: Start the first electric push rod, drive the main frame (14) to move up and down along the spraying frame (13) to the working height, and then start the second electric push rod to push the auxiliary frame (15) to expand in the opposite direction of the main frame and drive the self-adaptive spraying assembly (2) and the automatic opening and closing assembly (3) to link to adjust the spraying width; S2: During the expansion of the auxiliary frame (15), the spraying total seat (24) is stretched out from the adjusting seat (21) with the output pipe, the adjusting cylinder (22) slides in the sliding groove, the telescopic spring rod (26) is stretched, and the pressure sensor on the pressure plate (27) detects the pressure change; S3: The pressure sensor transmits data to the controller, which judges the expansion degree of the auxiliary frame (15) and the exposure number of the auxiliary sprayer (17) according to the pressure, controls the pressure regulating valve on the auxiliary sprayer (17), and the greater the expansion distance, the higher the spraying amount; S4: The auxiliary frame (15) drives the moving seat (216) to slide, the passive gear (218) rolls on the rack plate (219), and through the bevel gear (217) and the gear disc (214), the variable-diameter shutter (212) is driven to rotate, gradually expanding the exposure area of the spraying hole (23); S5: When the auxiliary frame (15) is reset to the main frame (14), the driving rod (215) pushes the passive plate (34), which drives the opening and closing plate (32) to cover the through hole (210) corresponding to the main sprayer (16) through the connecting plate (33) during movement, while the auxiliary sprayer (17) is retracted into the adjusting seat (21) and is blocked by the shielding plate (25), and the automatic opening and closing assembly (3) is reset; S6: The expansion of the auxiliary frame (15) causes the driving rod (215) to disengage from the passive plate (34), the first reset spring rod (322) pushes the opening and closing plate (32) to reset, the through hole (210) corresponding to the main sprayer (16) is opened, the spraying total seat (24) is stretched out, the shielding plate (25) and the adjusting cylinder (22) slide in coordination, the exposed auxiliary sprayer (17) is exposed and the corresponding spraying hole (23) is opened, and the main sprayer (16) and the exposed auxiliary sprayer (17) are synchronized to restore spraying; S7: When only the main sprayer (16) is needed in a narrow area, manually push the passive plate (34) to overcome the resistance of the second reset spring rod (35) to make it disengage from the driving rod (215), the first reset spring rod (322) quickly opens the opening and closing plate (32), and the main sprayer (16) works independently.

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