A highway subgrade ultra-thin wearing layer spraying device
By monitoring vehicle movement using wheel speed sensors and combining this with the design of electronically controlled valves and fixed spacing of spray booms, the problem of inflexible spraying in existing devices has been solved, achieving automated control and improved construction quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG LUTAI HIGHWAY ENG CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-05-29
AI Technical Summary
The existing ultra-thin layer spraying devices for highway subgrade rely on manual control for material spraying, resulting in inflexible spraying and problems such as spraying continuing even when the vehicle is stopped or not spraying in time when the vehicle is moving, affecting construction quality and practicality.
Wheel speed sensors are used to monitor the movement of the moving wheels of the traction vehicle. The automatic opening and closing of material spraying is achieved through electronically controlled valves. Combined with the fixed distance between the spraying boom and the roadbed, the system realizes the functions of automatic spraying of materials by vehicle and termination of spraying when the vehicle stops.
The system achieves automated control of material spraying, improves construction quality and flexibility, ensures that the spraying volume matches the travel speed, and enhances the practicality and construction effect of the device.
Smart Images
Figure CN224299744U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of asphalt pavement repair technology, and in particular to a spraying device for ultra-thin consumable layer of highway subgrade. Background Technology
[0002] In major and medium-scale repairs of asphalt pavements, restoring the stability of the subgrade and improving the interlayer adhesion of the pavement are crucial. The ultra-thin layer spraying device for highway subgrade can evenly spray emulsified asphalt, modified asphalt and other materials onto the subgrade surface to form an ultra-thin functional layer. By precisely controlling the spraying amount and thickness, this device can effectively enhance the waterproof performance of the subgrade, repair damage to old subgrades, strengthen the adhesion between the subgrade and the newly paved asphalt surface layer, prevent interlayer slippage, and prevent the recurrence of pavement diseases.
[0003] However, the existing ultra-thin layer spraying devices for highway subgrades are manually controlled from the driver's cab. This means that the spraying cannot be adjusted according to the vehicle's movement, which can easily lead to situations where the spraying continues even when the vehicle is stationary or the spraying fails to occur when the vehicle is moving. This results in poor flexibility and low practicality. Utility Model Content
[0004] This utility model relates to a spraying device for ultra-thin consumable layers of highway subgrade, which has a spraying component. The spraying component can automatically start and stop the material spraying function by monitoring the movement status of the moving wheels independent of the traction vehicle. Thus, it realizes the function of automatic spraying of materials when the vehicle is moving and stopping spraying when the vehicle stops. No manual control is required, making it flexible and convenient to use. Under the action of the spraying component, the spraying rod can always maintain a fixed distance from the subgrade to spray materials. It has the function of high construction quality, high flexibility and practicality.
[0005] This utility model provides a spraying device for ultra-thin consumable layer of highway subgrade, specifically including: a connecting frame and a spraying assembly. The connecting frame is fixedly installed at the rear of the tractor vehicle, and the spraying assembly consists of a holding mechanism and a spraying mechanism.
[0006] The retaining mechanism includes a retainer, a positioning rod, an adjusting rod, and a moving wheel. The retainer is inserted into the bottom of the connecting frame, and the positioning rod is rotatably connected inside the retainer. The adjusting rod is rotatably connected inside the connecting frame, and the moving wheel is rotatably connected to the bottom of the retainer. The spraying mechanism includes a spraying rod and a nozzle. The nozzle is fixedly installed at the bottom of the spraying rod, and the spraying rod is inserted into the side of the retainer.
[0007] Furthermore, the connecting frame is an inverted "U"-shaped frame, and there are two sets of holding mechanisms, which are symmetrically arranged on both sides of the connecting frame.
[0008] Furthermore, the top of the retainer is provided with an adaptive top spring, and the two ends of the adaptive top spring abut against the top of the retainer and the interior of the connecting frame, respectively.
[0009] Furthermore, the positioning rod has threads on its outer surface, and the positioning rod is screwed into the inside of the spray rod through the threaded connection of the rod body.
[0010] Furthermore, the positioning rod has a synchronization groove inside, and the bottom of the adjusting rod has a regular polygonal cross-sectional shape. The bottom of the adjusting rod is inserted into the synchronization groove, and the adjusting rods of the two sets of holding mechanisms are connected by a sprocket and chain drive.
[0011] Furthermore, the spraying mechanism also includes an electrically controlled valve and a wheel speed sensor. The wheel speed sensor is fixedly installed at the bottom of the cage and can monitor the movement status of the moving wheel. The electrically controlled valve is fixedly installed at the top of the spraying rod, and its two ends are connected to the internal channel of the spraying rod and the feeding device through pipes, respectively.
[0012] This utility model provides a spraying device for ultra-thin consumable layer of highway subgrade, which has the following beneficial effects:
[0013] The spraying assembly can automatically start and stop the material spraying function by monitoring the movement status of the moving wheels independent of the traction vehicle. This enables automatic spraying of materials when the vehicle is moving and stopping spraying when the vehicle stops, eliminating the need for manual control. It is flexible and convenient to use. Furthermore, under the action of the spraying assembly, the spraying bar can always maintain a fixed distance from the roadbed to spray materials, resulting in high construction quality and improving the flexibility and practicality of the device. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.
[0015] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.
[0016] In the attached diagram:
[0017] Figure 1 A schematic diagram of the structure of this utility model is shown.
[0018] Figure 2 A schematic diagram of the internal structure of this utility model is shown.
[0019] Figure 3 This utility model is shown Figure 2 Enlarged structural diagram of part A in the middle.
[0020] Figure 4 A schematic diagram of the disassembled retaining mechanism of this utility model is shown.
[0021] Figure 5 A schematic diagram of the structure of this utility model when it moves with a tractor vehicle for construction is shown.
[0022] List of reference numerals
[0023] 1. Connecting frame;
[0024] 2. Holding mechanism; 201. Cage; 2011. Adaptive top spring; 202. Positioning rod; 2021. Synchronization groove; 203. Adjusting rod; 204. Moving wheel;
[0025] 3. Spraying mechanism; 301. Spray bar; 302. Electrically controlled valve; 303. Nozzle; 304. Wheel speed sensor. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0027] Please refer to Figures 1 to 5 Example 1:
[0028] This utility model proposes a spraying device for ultra-thin consumable layer of highway subgrade, including: a connecting frame 1 and a spraying assembly. The connecting frame 1 is fixedly installed at the rear of the tractor vehicle, and the spraying assembly is composed of a holding mechanism 2 and a spraying mechanism 3.
[0029] The retaining mechanism 2 includes a retainer 201, a positioning rod 202, an adjusting rod 203, and a moving wheel 204. The retainer 201 is inserted into the bottom of the connecting frame 1, and the positioning rod 202 is rotatably connected inside the retainer 201. The adjusting rod 203 is rotatably connected inside the connecting frame 1, and the moving wheel 204 is rotatably connected to the bottom of the retainer 201. The spraying mechanism 3 includes a spraying rod 301 and a nozzle 303. The nozzle 303 is fixedly installed at the bottom of the spraying rod 301, and the spraying rod 301 is inserted into the side of the retainer 201.
[0030] The spraying mechanism 3 also includes an electrically controlled valve 302 and a wheel speed sensor 304. The wheel speed sensor 304 is fixedly installed at the bottom of the retainer 201 and can monitor the movement status of the moving wheel 204. The electrically controlled valve 302 is fixedly installed at the top of the spraying boom 301. The two ends of the electrically controlled valve 302 are respectively connected to the internal channel of the spraying boom 301 and the feeding equipment through pipes. The electrically controlled valve 302, the wheel speed sensor 304, and the external power supply and control device are electrically connected. Its specific structure and working principle are existing mature technologies and will not be described in detail here. In use, the traction vehicle can drive the spraying components to move synchronously through the connecting frame 1 to achieve the function of forming an ultra-thin layer of sprayed material on the roadbed. Under the action of the adaptive top spring 2011, the moving wheel The 204 can be pressed against the roadbed. When the spraying assembly moves with the traction vehicle, the moving wheel 204 will also rotate synchronously. The wheel speed sensor 304 monitors the movement status of the moving wheel 204 and sends the monitoring signal to the control device. The control device then controls the opening and closing of the electronically controlled valve 302 to realize the function of automatic spraying of material by vehicle and stopping spraying when the vehicle stops. When the electronically controlled valve 302 is open, the material on the traction vehicle can be pumped into the interior of the spraying bar 301 and sprayed out from the nozzle 303 to prepare the consumable layer. The opening and closing degree of the electronically controlled valve 302 can also be controlled by monitoring the rotation speed of the moving wheel 204. Thus, the spraying volume can be increased when the moving speed is high and reduced when the moving speed is low, ensuring the consistency of the roadbed consumable layer thickness, stable construction, and high construction quality.
[0031] Among them, the wheel speed sensor 304 and the electronically controlled valve 302 establish a closed-loop electronic control relationship through the control system to achieve dynamic matching between the spray volume and the driving speed. The specific working logic is as follows:
[0032] Signal acquisition: The wheel speed sensor 304 (usually Hall effect or electromagnetic) is directly installed on the axle of the moving wheel 204 to monitor the rotation speed of the moving wheel 204 in real time (unit: revolutions per minute) and convert it into an electrical signal (such as a frequency signal or pulse signal) for output.
[0033] Signal transmission and processing: The raw signal output by the wheel speed sensor 304 is transmitted to the control device (usually a PLC or microcontroller) through a shielded cable. The control device has a built-in algorithm to process the signal, convert the rotation speed value into the actual driving speed (unit: m / s), and calculate the volume of material to be sprayed per unit time in combination with the width of the spray bar 301.
[0034] Control command generation: Based on preset spray volume parameters (e.g., L / m) and real-time speed, the control device calculates the optimal opening value of the electrically controlled valve 302 using a PID algorithm. For example:
[0035] When the speed is 5m / s, the valve needs to be opened by 70% to ensure the designed spray volume;
[0036] When the speed increases to 10m / s, the valve opening automatically adjusts to 90%.
[0037] Actuator action: The control device outputs a standard control signal to the drive module (such as a stepper motor or servo motor) of the electric valve 302 to precisely adjust the valve opening. The valve opening is linearly related to the spray volume, thus achieving precise flow control.
[0038] The connecting frame 1 is an inverted "U"-shaped frame, and the holding mechanism 2 has two sets, which are symmetrically arranged on both sides of the connecting frame 1. The top of the holding frame 201 is provided with an adaptive top spring 2011, and the two ends of the adaptive top spring 2011 abut against the top of the holding frame 201 and the inside of the connecting frame 1, respectively. In use, the positioning rod 202 can position the distance between the spraying rod 301 and the bottom of the moving wheel 204, so that the spraying rod 301 can always maintain a fixed distance from the roadbed for spraying materials. This distance can be freely adjusted to adapt to different construction conditions. The positioning rod 202 has a synchronization groove 2021 inside, and the bottom of the adjusting rod 203 has a regular polygonal cross-sectional shape. The bottom rod is inserted into the synchronous groove 2021. The adjusting rods 203 of the two sets of holding mechanisms 2 are connected by a sprocket and chain drive. When the adjusting rod 203 is rotated, it can drive the positioning rod 202 to rotate through the synchronous groove 2021. The positioning rod 202 has threads on its outside and is screwed into the spray rod 301 through the thread. When the positioning rod 202 rotates, it can drive the spray rod 301 to move up and down on the side of the retainer 201 through the thread, thereby changing the distance between the spray rod 301 and the bottom of the moving wheel 204, that is, the distance between the spray rod 301 and the roadbed surface. The adjusting rods 203 of the two sets of holding mechanisms 2 can be synchronously driven by a sprocket and chain, making the adjustment stable and efficient.
[0039] The working principle of this embodiment is as follows: Based on actual construction needs, the distance between the spraying rod 301 and the roadbed surface is adjusted. The positioning rod 202 can position the distance from the spraying rod 301 to the bottom of the moving wheel 204, thus ensuring that the spraying rod 301 maintains a fixed distance from the roadbed for spraying materials. This distance is freely adjustable and can adapt to different construction conditions. When the adjusting rod 203 is rotated, it drives the positioning rod 202 to rotate via the synchronous groove 2021. During rotation, the positioning rod 202 drives the spraying rod 301 to move up and down on the side of the retainer 201 via the rod thread, thereby changing the distance from the spraying rod 301 to the bottom of the moving wheel 204, i.e., the distance between the spraying rod 301 and the roadbed surface. Furthermore, the adjusting rods 203 of the two sets of retaining mechanisms 2 can be synchronously driven by sprockets and chains, ensuring stable and efficient adjustment. Afterwards, the traction vehicle can... The connecting frame 1 drives the spraying assembly to move synchronously, realizing the function of spraying materials on the roadbed to form an ultra-thin consumable layer. Under the action of the adapting top spring 2011, the moving wheel 204 can abut against the roadbed. When the spraying assembly moves with the traction vehicle, the moving wheel 204 will also rotate synchronously. The wheel speed sensor 304 monitors the movement state of the moving wheel 204 and sends the monitoring signal to the control device. The control device then controls the opening and closing of the electronically controlled valve 302 to realize the function of automatic spraying of materials by vehicle and stopping spraying when the vehicle stops. When the electronically controlled valve 302 is open, the material on the traction vehicle can be pumped into the interior of the spraying bar 301 and sprayed out from the nozzle 303 to form a consumable layer. The opening and closing degree of the electronically controlled valve 302 can also be controlled by monitoring the rotation speed of the moving wheel 204. Thus, when the moving speed is faster, the amount of material sprayed can be increased, and when the moving speed is slower, the amount of sprayed can be reduced to ensure the consistency of the thickness of the roadbed consumable layer.
Claims
1. A spraying device for ultra-thin wear layer of highway subgrade, characterized in that, include: A connecting frame (1) and a spraying assembly, wherein the connecting frame (1) is fixedly installed at the rear of the tractor vehicle, and the spraying assembly consists of a holding mechanism (2) and a spraying mechanism (3); The holding mechanism (2) includes a retainer (201), a positioning rod (202), an adjusting rod (203), and a moving wheel (204). The retainer (201) is inserted into the bottom of the connecting frame (1), and the positioning rod (202) is rotatably connected to the inside of the retainer (201). The adjusting rod (203) is rotatably connected to the inside of the connecting frame (1), and the moving wheel (204) is rotatably connected to the bottom of the retainer (201). The spraying mechanism (3) includes a spraying rod (301) and a nozzle (303). The nozzle (303) is fixedly installed at the bottom of the spraying rod (301), and the spraying rod (301) is inserted into the side of the retainer (201).
2. The highway subgrade ultra-thin layer spraying device according to claim 1, characterized in that, The connecting frame (1) is an inverted "U" shaped frame, and the holding mechanism (2) is provided in two sets, with the two sets of holding mechanisms (2) symmetrically arranged on both sides of the connecting frame (1).
3. The ultra-thin layer spraying device for highway subgrade according to claim 2, characterized in that, The top of the retainer (201) is provided with an adaptive top spring (2011), and the two ends of the adaptive top spring (2011) abut against the top of the retainer (201) and the interior of the connecting frame (1), respectively.
4. The ultra-thin layer spraying device for highway subgrade according to claim 3, characterized in that, The positioning rod (202) has threads on the outside of its body, and the positioning rod (202) is screwed into the inside of the spray rod (301) through the rod body threads.
5. A spraying device for ultra-thin consumable layer of highway subgrade according to claim 4, characterized in that, The positioning rod (202) has a synchronization groove (2021) inside, and the bottom of the adjusting rod (203) has a regular polygonal cross-section. The bottom of the adjusting rod (203) is inserted into the synchronization groove (2021). The adjusting rods (203) of the two sets of holding mechanisms (2) are connected by a sprocket and chain drive.
6. A spraying device for ultra-thin consumable layer of highway subgrade according to claim 5, characterized in that, The spraying mechanism (3) also includes an electrically controlled valve (302) and a wheel speed sensor (304). The wheel speed sensor (304) is fixedly installed at the bottom of the retainer (201) and can monitor the movement status of the moving wheel (204). The electrically controlled valve (302) is fixedly installed at the top of the spraying bar (301). The two ends of the electrically controlled valve (302) are respectively connected to the internal channel of the spraying bar (301) and the feeding device through pipes.