Chip seal spreader
By using a multi-stage screening and weighing sensor system and an anti-clogging material spreading mechanism, the problems of uneven and falling gravel spread were solved, achieving efficient gravel gradation and uniform spreading, thus improving the quality of the road seal layer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 广东省路桥建设发展有限公司
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-14
AI Technical Summary
Among the existing road seal construction machinery, the gradation of the crushed stone is poor and the seal quality is unstable, resulting in serious crushed stone loss, which cannot meet the requirements of complex gradation seal process.
By employing a multi-stage screening and weighing sensor system, combined with vibration anti-clogging and spiral feeding mechanism, precise gradation and uniform distribution of crushed stone are achieved.
It achieves dynamic control and anti-clogging of crushed stone gradation, improves the quality of the sealing layer and construction efficiency, and meets the requirements of highway construction specifications.
Smart Images
Figure CN224494810U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of road construction equipment technology, specifically to a gravel seal spreader. Background Technology
[0002] With the continuous expansion of my country's highway network and the year-by-year increase in traffic load, the maintenance and improvement of road surface performance has become a key link in ensuring traffic safety and efficiency.
[0003] However, various defects inevitably occur in road surfaces during use, among which the decline in anti-skid performance and the expansion of microcracks are particularly prominent. These defects not only shorten the service life of the road surface, but also become one of the important factors causing traffic accidents.
[0004] To address these challenges, anti-skid seal technology, as an effective preventative maintenance method, is widely used in road maintenance. This technology involves simultaneously spreading emulsified asphalt (emulsion) and aggregate (crushed stone) using a chip sealer, followed by 2-3 passes with rubber-tired rollers to form a surface functional layer with high anti-skid properties and high water density, thereby significantly extending the service life of the pavement.
[0005] In traditional road seal coat construction machinery, the aggregate placement stage generally suffers from technical limitations, directly affecting the seal coat quality and construction efficiency. Existing technologies typically employ a single hopper design, capable of spreading only single-graded aggregate, which cannot adapt to complex gradation seal coat processes. This results in poor aggregate embedment after spreading, and severe aggregate detachment due to vehicle loads in the early stages of seal coat application. Utility Model Content
[0006] In view of this, the present invention provides a crushed stone sealing spreader. The present invention can use multiple screens and multiple screens and weighing sensors to screen and quantitatively mix crushed stone, thereby accurately improving the spreading quality of crushed stone and meeting different sealing spreader processes.
[0007] To solve the above-mentioned technical problems, this utility model provides a crushed stone sealing spreader, including a hopper for storing crushed stone.
[0008] The batching bin is located on the side of the silo, and the crushed stone in the silo can be discharged into the batching bin.
[0009] Multiple screens are arranged vertically in a linear pattern inside the batching bin, with the mesh size decreasing from top to bottom. Each screen end is connected to the outer wall of the bin, allowing the crushed stone to be graded when it falls onto the screens.
[0010] The receiving plate is connected to the hopper at its end and is arranged in a linear fashion with multiple screens and located at the bottom of the multiple screens. The receiving plate can receive the material screened out by the bottom screen.
[0011] Multiple weighing sensors are fixed on the receiving plate and each screen. Correspondingly, multiple discharge ports are also provided on the feeding bin, with each discharge port located at the end of the screen or receiving plate away from the bin. The weighing sensors can control the amount discharged from the corresponding discharge port according to the diameter of the crushed stone.
[0012] The feeding hopper is located on the side of the batching hopper and is connected to multiple discharge ports. The crushed stone discharged from each discharge port can be discharged into the feeding hopper.
[0013] The spiral feeder is located at the end of the feed hopper and is used to distribute the crushed stone inside the feed hopper.
[0014] The batching hopper is also equipped with a vibration motor, which can prevent clogging of the screen.
[0015] The feed hopper is also equipped with a spiral gap solenoid valve for the corresponding spiral feeder, which is used to adjust the gap between the two rollers in the feeder, thereby preventing larger diameter stones from being unable to be discharged.
[0016] The spiral fabric feeder is also equipped with a telescopic component for adjusting the width of the fabric.
[0017] There are three sieves, with the mesh diameter decreasing from top to bottom.
[0018] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:
[0019] 1. Multi-stage screening and precision weighing system enables dynamic control of crushed stone gradation.
[0020] Independent weighing and proportion control: Each screen and receiving plate is equipped with a high-precision weighing sensor to monitor the amount of crushed stone of each particle size in real time. The PID control system dynamically adjusts the opening of the discharge port according to the preset gradation ratio, which improves the accuracy compared with the traditional total weighing method and meets the stringent requirements of the "Technical Specification for Construction of Highway Asphalt Pavement" for the gradation of sealing layer crushed stone.
[0021] 2. Anti-clogging fabric placement mechanism to ensure continuous and uniform construction.
[0022] Vibration anti-clogging mechanism: A vibration motor is added to the batching silo. The high-frequency micro-vibration effectively breaks the electrostatic adsorption and mechanical interlocking between the crushed stones, thereby reducing the screen clogging rate, reducing the average daily construction interruption time, and improving the overall utilization rate of the equipment.
[0023] Dynamic adjustment of spiral gap: A spiral gap solenoid valve is installed in the feeding hopper, which can automatically adjust the gap of the spiral feeder rollers in real time according to the particle size data fed back by the weighing sensor, ensuring that the crushed stone can pass through smoothly and avoiding interruption of feeding or uneven density caused by large-diameter crushed stone getting stuck. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of a crushed stone sealing spreader according to the present invention;
[0025] Figure 2 This is a schematic diagram of the structure of the crushed stone spreading system of this utility model.
[0026] Explanation of reference numerals in the attached figures:
[0027] 10. Storage bin;
[0028] 20. Batching bin; 21. Screen; 22. Receiving plate; 23. Weighing sensor; 24. Discharge port;
[0029] 30. Feeding bin; 31. Spiral feeder; 32. Spiral gap solenoid valve; 33. Telescopic assembly; 34. Vibration motor. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the appendices of the embodiments of this utility model. Figure 1-2 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.
[0031] Example 1;
[0032] This embodiment provides a crushed stone seal spreader, such as... Figure 1-2As shown: The spreader includes a truck bed with only one inclined partition. This partition forms a material bin 10 and a batching bin 20 on the spreader. The material bin 10 stores materials and has a discharge channel connected to the batching bin 20, allowing the crushed stone in the material bin 10 to enter the batching bin 20. The batching bin 20 contains three screens 21 and one receiving plate 22. The receiving plate 22 is located below the three screens 21 and is arranged linearly with the screens 21. The uppermost screen 21 can screen crushed stone with a diameter of 5mm, the middle screen 21 can screen crushed stone with a diameter of 4mm, and the lowermost screen 21 can screen material with a diameter of 3mm. In this embodiment, the stone material is preferably 2-5mm in size. This way, the three screens 21 can divide the stone material into four parts. Each receiving plate 22 and each screen 21 is equipped with a weighing sensor 23. The weighing sensor 23 can weigh the material on the receiving plate 22 or the screen 21. The batching bin 20 is also equipped with four discharge ports 24. Each discharge port 24 is positioned corresponding to the receiving plate 22 and the screen 21, which can discharge and spread crushed stone of a single diameter. The weighing sensor 23 can also control the opening and closing of the discharge ports 24, thereby controlling the amount of crushed stone of a single diameter, which indirectly increases the uniformity of the crushed stone spreading and thus increases the quality of the crushed stone spreading.
[0033] The side of the batching bin 20 is also provided with a discharge bin 30, which is connected to multiple discharge ports 24. The crushed stone in each discharge port 24 can enter the discharge bin 30. By opening multiple discharge ports 24, the weighing sensor 23 can control the proportion of crushed stone of different diameters. The discharge bin 30 is also provided with a spiral spreader 31, which can evenly spread the crushed stone in the discharge bin 30 onto the road surface.
[0034] Preferably, a vibration motor 34 is also provided on the inner wall of the batching bin 20. When the vibration motor 34 is working, it can drive the wall of the batching bin 20 to vibrate, thereby indirectly driving multiple screens 21 to vibrate together. This not only increases the screening efficiency of the screens 21 for crushed stone, but also prevents the crushed stone from clogging the mesh of the screens 21.
[0035] Furthermore, the spiral feeder 31 has two rollers, and a spiral gap solenoid valve 32 is also provided in the feed bin 30. By operating the spiral solenoid valve, the gap between the two rollers can be increased or decreased directly or indirectly, thereby preventing large-diameter stones from getting stuck in the feed bin 30 and unable to fall.
[0036] Furthermore, the spiral feeder 31 is also equipped with a telescopic component 33. When the telescopic component 33 is working, it can block both ends between the two rollers. That is, when the telescopic component 33 is working, it can adjust the width of the spiral feeder 31 when feeding.
[0037] Example 2;
[0038] The difference from Embodiment 1 is that there are four screens, with mesh diameters of 9.5mm, 4.75mm, 2.36mm, and 1.18mm from top to bottom. That is, materials with a diameter greater than 9.5mm will be above the top screen, materials with a diameter between 9.5-4.75mm will be above the second screen, materials with a diameter between 4.75-2.36mm will be above the third screen, materials with a diameter between 2.36-1.18mm will be above the bottom screen, and materials with a diameter less than 1.18mm will be above the receiving plate. There are also five corresponding weighing sensors, which are respectively set on the receiving plate and each screen. At the same time, there are also six discharge ports, which are respectively set on the receiving plate and the end of each screen.
[0039] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0040] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A crushed stone seal spreader, characterized in that: include; The silo (10) is used to store crushed stone; The batching bin (20) is located on the side of the silo (10), and the crushed stone in the silo (10) can be discharged into the batching bin (20); Multiple screens (21) are arranged vertically in a linear pattern inside the feed bin (20), and the mesh size of the multiple screens (21) decreases from top to bottom, and the end of each screen (21) is connected to the outer wall of the feed bin (10). The receiving plate (22) is connected at its end to the hopper (10) and is arranged in a linear fashion with multiple screens (21) and located at the bottom of the multiple screens (21); Multiple weighing sensors (23) are provided. A weighing sensor (23) is fixed on the receiving plate (22) and each screen (21). Correspondingly, multiple discharge ports (24) are provided on the feeding bin (20) and the receiving plate (22). Each discharge port (24) is located on the end of the screen (21) or the receiving plate (22) away from the bin (10). The feeding hopper (30) is located on the side of the batching hopper (20) and is connected to multiple discharge ports (24); The spiral feeder (31) is located at the end of the feed bin (30) and is used to feed the crushed stone in the feed bin (30).
2. The crushed stone seal spreader as described in claim 1, characterized in that: The batching bin (20) is also equipped with a vibration motor (34).
3. The crushed stone seal spreader as described in claim 2, characterized in that: The feed hopper (30) is also equipped with a spiral gap solenoid valve (32) corresponding to the spiral feeder (31), which is used to adjust the gap between the two rollers in the feeder.
4. The crushed stone seal spreader as described in claim 1, characterized in that: The spiral fabric feeder (31) is also provided with a telescopic component (33) for adjusting the width of the fabric.
5. A crushed stone seal spreader as described in claim 4, characterized in that: There are three screens (21), with the mesh diameter decreasing from top to bottom.