A cover attaching device for a water-permeable paving block
By spraying a fast-curing polyurethane resin or a low-viscosity UV polyurethane resin onto the surface of permeable bricks, combined with ultraviolet irradiation technology, a mesh-like surface layer is formed, which solves the problem of reduced permeability of the permeable brick surface and improves weather resistance and slip resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXIANG HONGCHEN WANJU ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-08-04
AI Technical Summary
Existing surface coating technologies for permeable bricks can easily lead to a significant decrease in permeability, especially on permeable bricks with a textured surface or a significantly undulating surface. The sprayed organic resin material can easily flow into the permeable pores, resulting in reduced permeability or even complete impermeability.
Using rapid-setting polyurethane resin or UV polyurethane resin with low viscosity, a mesh-like organic resin coating layer is formed on the surface of the permeable brick through specific spraying equipment and ultraviolet irradiation technology. This ensures that the resin droplets do not flow or run off in the permeable pores, thus maintaining permeability.
A porous mesh overlay layer is constructed on the surface of the permeable bricks to maintain permeability and improve weather resistance and slip resistance, thus solving the problem of decreased permeability.
Smart Images
Figure CN224591283U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a permeable brick or slab for paving, and particularly to a device and method for attaching a resin coating to a permeable brick for paving. Background Technology
[0002] With the advancement of sponge city initiatives, permeable bricks are increasingly being used for paving sidewalks, open plazas in commercial centers, and public spaces such as parks. To create a more aesthetically pleasing ground environment, stone-look permeable bricks or slabs have also emerged for paving open-air surfaces. These bricks can be broadly categorized into organic and inorganic permeable bricks. Inorganic permeable bricks are composed of inorganic materials such as lime, cement, sand, gravel, and concrete, exhibiting high weather resistance and fire resistance, but with poor flexibility and thermal insulation. All types of inorganic permeable bricks used for paving require anti-slip and anti-friction properties during application. Wear and durability are challenges. Because permeable bricks are subjected to rain, sun, freeze-thaw cycles, and carbonization over long periods of use, their surface structure is prone to becoming porous and shedding sand, shortening their lifespan. To overcome these defects, technicians in the field typically spray a weather-resistant organic resin material onto the surface of the permeable bricks, forming a protective coating to achieve anti-slip, wear-resistant, and weather-resistant properties. While this existing coating technology significantly enhances the weather resistance of the brick surface, it also leads to a substantial decrease in the permeability of the surface layer. Solving these problems remains a challenge for technicians in the field.
[0003] To achieve better slip resistance and a more aesthetically pleasing three-dimensional appearance, many permeable bricks with stone-like surfaces are made with a textured finish, such as a lychee-like surface or a textured surface with significant undulations. How to apply a weather-resistant organic resin material to the surface of these permeable bricks while maintaining good permeability is a challenge in on-site implementation. Because the droplets of the organic resin material sprayed onto such surfaces tend to level out, they easily penetrate the permeable pores of the brick surface, significantly reducing permeability and even causing the bricks to become impermeable. Therefore, how to apply an organic resin coating to the surface of these permeable bricks is also a challenge in on-site operation. Summary of the Invention
[0004] This invention provides a surface covering attachment device for permeable bricks used in paving, which solves the technical problem that existing surface covering technologies can easily lead to a significant decrease in the permeability of the permeable brick surface.
[0005] The present invention solves the above technical problems through the following technical solutions: One aspect of the overall concept of this invention involves selecting a polyurethane resin with rapid solidification properties, such as polyether polyol. Heating this resin improves its fluidity. The weather-resistant polyurethane resin is then high-pressure sprayed onto the top surface of a permeable brick using a polyurethane spraying device. A diluent can be added simultaneously to rapidly solidify the polyurethane resin droplets adhering to the top surface of the permeable brick into granules without leveling. Furthermore, the sprayed weather-resistant polyurethane resin droplets combine with each other to form a mesh-like organic resin overlay with gaps and pores, thus achieving a permeable surface. Specifically, a polyurethane spraying device capable of accepting two-component materials is selected. A polyether polyol with a viscosity of 3500 mPa·s is selected and heated to 60°C-70°C. An aliphatic polyisocyanate is selected and simultaneously heated to 60°C-70°C. The heated materials are then simultaneously sprayed onto the top surface of the permeable brick. The polyether polyol and aliphatic polyisocyanate are mixed in a 1:1 weight ratio in a polyurethane spraying equipment to form a weather-resistant polyurethane resin mixture. This mixture is then sprayed onto the top surface of permeable bricks at room temperature under a pressure of 25 MPa. The time it takes for the sprayed polyurethane resin mixture to reach the top surface of the permeable brick is controlled to be 0.8-1.5 seconds. The weight of the weather-resistant polyurethane resin mixture evenly sprayed per square meter of the permeable brick surface is 80-110 grams. The diameter of the naturally cured weather-resistant polyurethane resin droplets formed on the permeable brick surface is 50-120 micrometers. These naturally cured droplets combine to form pores, thus forming a mesh-like organic resin coating layer with gaps. Through the implementation of the above technical solution, a porous organic resin mesh is constructed on the surface of the permeable brick. The second aspect of the overall concept of this invention involves selecting a UV polyurethane resin with a viscosity of 300-500 mPa·s. This single-component UV polyurethane resin is sprayed onto the top surface of a permeable brick using a polyurethane spraying device. The weight of the weather-resistant polyurethane resin mixture uniformly sprayed per square meter of the permeable brick surface is 80-110 grams. Then, ultraviolet light is irradiated onto the top surface of the permeable brick, causing the droplets sprayed onto the surface to solidify under ultraviolet light, thereby forming a porous cover. Because the surface of the permeable brick has permeable pores of varying diameters, the UV polyurethane resin with a viscosity of 300-500 mPa·s is sprayed onto this... At the top ports of these pores, due to the relatively low viscosity of the UV polyurethane resin, the UV polyurethane resin flowing into the larger permeable pores will quickly pass through these pores and will not clog these larger permeable pores. It will only clog the very small capillary permeable pores. Therefore, the UV polyurethane resin sprayed on the surface of the permeable brick can only stay on the top surface of the permeable brick outside the larger permeable pores. It will then cure under subsequent ultraviolet irradiation, thus forming a mesh-like organic resin cover layer that retains the gaps and pores of the permeable brick surface. The core of this technical solution is to spray an organic resin mesh that does not clog most of the existing pores of the permeable brick onto the surface of the permeable brick.
[0006] A surface coating attachment device for permeable bricks used in paving includes an automatic permeable brick conveyor line and permeable bricks. A polyurethane resin spraying gantry is installed on the automatic permeable brick conveyor line. A nozzle of a polyurethane spraying device is installed on the polyurethane resin spraying gantry. The main unit of the polyurethane spraying device is connected to the nozzle. The main unit of the polyurethane spraying device contains weather-resistant polyurethane for surface coating of the permeable bricks. A permeable brick conveying trolley is installed on the automatic permeable brick conveyor line below the polyurethane resin spraying gantry. The permeable bricks are laid flat on the platform of the permeable brick conveying trolley with the surface layer facing upwards. A conveying trolley drive device is installed on the automatic permeable brick conveyor line to the left of the permeable brick conveying trolley. The conveying trolley drive device controls the permeable brick conveying trolley to move from left to right through the polyurethane resin spraying gantry. At the same time, the polyurethane spraying device sprays the weather-resistant polyurethane onto the surface of the permeable bricks through the nozzle, thereby achieving surface coating attachment on the permeable brick surface.
[0007] The polyurethane spraying equipment is a polyurethane spraying equipment that can input two-component materials. The two-component polyurethane spraying equipment is equipped with polyether polyol at a temperature of 60℃-70℃ and aliphatic polyisocyanate at a temperature of 60℃-70℃. The viscosity of the polyether polyol is 3500mPa.s. Furthermore, the polyether polyol and aliphatic polyisocyanate are mixed in the nozzle at a weight ratio of 1:1 and then sprayed out.
[0008] The spray pressure after mixing polyether polyol and aliphatic polyisocyanate is 25 MPa; the time for polyether polyol and aliphatic polyisocyanate to leave the nozzle and reach the top surface of the permeable brick is 0.8-1.5 seconds; the weight of the weather-resistant polyurethane resin mixture uniformly sprayed on the surface of the permeable brick per square meter is 80-110 grams.
[0009] Another option is to use UV polyurethane resin with a viscosity of 400-500 mPa·s in the polyurethane spraying equipment, and the weight of UV polyurethane resin evenly sprayed on the surface of permeable bricks is 80-110 grams.
[0010] On the permeable brick automatic conveyor line to the right of the polyurethane resin spraying gantry, there is an ultraviolet emitting gantry. An ultraviolet emitter is installed on the ultraviolet emitting gantry. The ultraviolet rays emitted by the ultraviolet emitter irradiate the surface of the permeable bricks on the permeable brick conveyor trolley platform passing through the ultraviolet emitting gantry, causing the UV polyurethane resin on the surface of the permeable bricks to solidify.
[0011] A method for attaching a surface coating to permeable bricks used in paving, characterized by the following steps: The first step is to select a polyurethane spraying equipment that can input two-component materials, and select polyether polyol and aliphatic polyisocyanate with a viscosity of 3500 mPa.s as the adhesion materials on the surface of the permeable bricks. The second step is to heat the polyether polyol selected in the first step to 60℃-70℃, and at the same time, heat the aliphatic polyisocyanate selected in the first step to 60℃-70℃. Then, input these two materials into the polyurethane spraying equipment and set the spraying pressure of the nozzle of the polyurethane spraying equipment to 25MPa. Third, under normal room temperature conditions, the permeable brick conveying trolley is controlled by the conveying trolley drive device to travel from left to right on the automatic conveyor line. When the permeable bricks on the platform of the permeable brick conveying trolley pass the polyurethane resin spraying gantry, the polyether polyol and aliphatic polyisocyanate are mixed in the nozzle and sprayed out, spraying the weather-resistant polyurethane resin mixture onto the surface of the permeable bricks. During this process, by controlling the traveling speed of the permeable brick conveying trolley, the weight of the weather-resistant polyurethane resin mixture evenly sprayed on each square meter of the permeable brick surface is 80-110 grams.
[0012] The time it takes for the polyether polyol and aliphatic polyisocyanate to leave the nozzle and reach the surface of the permeable brick after mixing is 0.8-1.5 seconds; the polyether polyol and aliphatic polyisocyanate are mixed in the nozzle at a weight ratio of 1:1.
[0013] The droplet diameter of the naturally cured, weather-resistant polyurethane resin mixture sprayed onto the surface of permeable bricks is 50-120 micrometers.
[0014] A method for attaching a surface coating to permeable bricks used in paving, characterized by the following steps: The first step is to select a polyurethane spraying equipment that can input single-component materials, and select a UV polyurethane resin with a viscosity of 300-500 mPa.s as the adhesion material on the surface of the permeable bricks. The second step is to input the UV polyurethane resin selected in the first step into the polyurethane spraying equipment. The third step involves controlling the permeable brick conveyor trolley via a drive device at room temperature. The trolley travels from left to right along the automatic conveyor line. When the permeable bricks on the trolley pass the polyurethane resin spraying gantry, UV polyurethane resin is sprayed onto the surface of the permeable bricks through nozzles. By controlling the travel speed of the permeable brick conveyor trolley, the weight of UV polyurethane resin evenly sprayed on each square meter of the permeable brick surface is 80-110 grams. Step 4: When the sprayed permeable bricks are conveyed to the underside of the ultraviolet emitting gantry, the ultraviolet rays emitted by the ultraviolet emitter irradiate the surface of the permeable bricks on the permeable brick conveying trolley, causing the UV polyurethane resin on the surface of the permeable bricks to solidify.
[0015] The permeable bricks on the permeable brick conveyor trolley are exposed to ultraviolet light for 15-20 seconds.
[0016] This invention utilizes a unique formulation of a weather-resistant polyurethane resin mixture, coupled with scientific control of the spraying temperature, pressure, distance, and volume of this resin mixture, to construct a porous mesh-like cover on the top surface of permeable bricks. Alternatively, by selecting a UV-cured polyurethane resin with lower viscosity, the resin sprayed onto the permeable brick surface that has entered the existing pores is channeled away and then irradiated with ultraviolet light onto the top surface of the permeable brick, thus forming a mesh-like organic resin cover layer that retains the entrances to the existing pores on the top surface of the permeable brick. This achieves permeability of the attached cover, ensuring the weather resistance and anti-slip properties of the permeable brick surface. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation
[0018] The present invention will now be described in detail with reference to the accompanying drawings: A surface coating attachment device for permeable bricks used in paving includes an automatic permeable brick conveyor line 1 and permeable bricks 4. A polyurethane resin spraying gantry 2 is installed on the automatic permeable brick conveyor line 1. A nozzle 5 of a polyurethane spraying device is installed on the polyurethane resin spraying gantry 2, and a main unit of the polyurethane spraying device is connected to the nozzle 5. The main unit of the polyurethane spraying device can be installed on the ground on one side of the polyurethane resin spraying gantry 2. The main unit of the polyurethane spraying device contains weather-resistant polyurethane for surface coating of permeable bricks. A permeable brick conveying trolley 3 is installed on the automatic permeable brick conveyor line 1 below the polyurethane resin spraying gantry 2. The permeable bricks 4 are laid flat on the platform of the permeable brick conveyor trolley 3 with the surface layer facing upwards. On the permeable brick automatic conveyor line 1 on the left side of the permeable brick conveyor trolley 3, a conveyor trolley drive device 6 is set up. The conveyor trolley drive device 6 controls the permeable brick conveyor trolley 3 to move from left to right through the polyurethane resin spraying gantry 2. At the same time, the polyurethane spraying equipment sprays weather-resistant polyurethane through the nozzles 5 onto the surface of the permeable bricks 4, thereby achieving an adhesion coating on the surface of the permeable bricks. The distance between the nozzles 5 and the platform of the permeable brick conveyor trolley 3, as well as the travel speed of the permeable brick conveyor trolley 3 controlled by the conveyor trolley drive device 6, are all adjustable.
[0019] The polyurethane spraying equipment is a polyurethane spraying equipment that can accept two-component materials. After the two-component materials are fed into the polyurethane spraying equipment, they are mixed in the nozzle 5 and then sprayed out. The polyurethane spraying equipment for two-component materials contains polyether polyol at a temperature of 60℃-70℃ and aliphatic polyisocyanate at a temperature of 60℃-70℃. Heating the two-component materials is to increase their fluidity, so that the two can be easily sprayed out after mixing. The viscosity of the polyether polyol is 3500 mPa·s. Furthermore, the polyether polyol and aliphatic polyisocyanate are mixed in the nozzle 5 at a weight ratio of 1:1 before being sprayed out.
[0020] The spray pressure after mixing polyether polyol and aliphatic polyisocyanate is 25 MPa; the time it takes for the polyether polyol and aliphatic polyisocyanate to travel from the nozzle 5 to the top surface of the permeable brick is 0.8-1.5 seconds. This travel time after spraying can be adjusted by adjusting the distance between the nozzle 5 and the platform of the permeable brick conveying trolley 3, as well as by changing the spray pressure; the weight of the weather-resistant polyurethane resin mixture uniformly sprayed on the surface of the permeable brick 4 per square meter is 80-110 grams. This spray amount is obtained through repeated experiments in order to form a weather-resistant polyurethane resin cover with good permeability pores on the surface of the permeable brick 4.
[0021] The weather-resistant polyurethane in the polyurethane spraying equipment is a UV polyurethane resin with a viscosity of 300-500 mPa·s. This viscosity of UV polyurethane resin has good fluidity, allowing the UV polyurethane resin that enters the pores of the permeable brick surface to flow out quickly, thus preventing the pores from being blocked. The weight of UV polyurethane resin evenly sprayed on each square meter of permeable brick surface is 80-110 grams. This spraying amount ensures the above effects while forming a resin coating on the surface of the permeable brick.
[0022] On the permeable brick automatic conveyor line 1 to the right of the polyurethane resin spraying gantry 2, there is an ultraviolet emitting gantry 7. An ultraviolet emitter 8 is installed on the ultraviolet emitting gantry 7. The ultraviolet rays emitted by the ultraviolet emitter 8 irradiate the surface of the permeable brick 4 on the platform of the permeable brick conveyor trolley 3 passing through the ultraviolet emitting gantry 7. The irradiation time can be controlled to be 15-20 seconds, so that the UV polyurethane resin on the surface of the permeable brick 4 solidifies.
[0023] A method for attaching a surface coating to permeable bricks used for paving ground includes an automatic permeable brick conveyor line 1 and permeable bricks 4. A polyurethane resin spraying gantry 2 is installed on the automatic permeable brick conveyor line 1. A spray nozzle 5 of a polyurethane spraying device is installed on the polyurethane resin spraying gantry 2, and the main unit of the polyurethane spraying device is connected to the spray nozzle 5. A permeable brick conveying trolley 3 is installed on the automatic permeable brick conveyor line 1 below the polyurethane resin spraying gantry 2. The permeable bricks 4 are laid flat on the platform of the permeable brick conveying trolley 3 with the surface layer facing upwards. A conveying trolley drive device 6 is installed on the left side of the automatic permeable brick conveyor line 1. The method is characterized by the following steps: Step 1: Select a polyurethane spraying equipment that can input two-component materials, and select polyether polyol and aliphatic polyisocyanate with a viscosity of 3500 mPa.s as the adhesion materials on the surface of permeable brick 4. The second step is to heat the polyether polyol selected in the first step to 60℃-70℃, and at the same time, heat the aliphatic polyisocyanate selected in the first step to 60℃-70℃. Then, input these two materials into the polyurethane spraying equipment and set the spraying pressure of the nozzle of the polyurethane spraying equipment to 25MPa. Third, under normal room temperature conditions, the permeable brick conveying trolley 3 is controlled by the conveying trolley drive device 6 to travel from left to right on the automatic conveyor line 1. When the permeable bricks 4 on the platform of the permeable brick conveying trolley 3 pass the polyurethane resin spraying gantry 2, the polyether polyol and aliphatic polyisocyanate are mixed in the nozzle 5 and sprayed out, spraying the weather-resistant polyurethane resin mixture onto the surface of the permeable bricks 4. During this process, by controlling the traveling speed of the permeable brick conveying trolley 3, the weight of the weather-resistant polyurethane resin mixture evenly sprayed on each square meter area of the permeable brick surface is 80-110 grams.
[0024] The time it takes for the polyether polyol and aliphatic polyisocyanate to leave the nozzle and reach the surface of the permeable brick after mixing is 0.8-1.5 seconds; the polyether polyol and aliphatic polyisocyanate are mixed in nozzle 5 at a weight ratio of 1:1.
[0025] A method for attaching a surface coating to permeable bricks used for paving ground, characterized in that the droplet diameter of the naturally curing, weather-resistant polyurethane resin mixture sprayed onto the surface of the permeable brick is 50-120 micrometers.
[0026] A method for attaching a surface coating to permeable bricks used for paving ground includes an automatic permeable brick conveyor line 1 and permeable bricks 4. A polyurethane resin spraying gantry 2 is installed on the automatic permeable brick conveyor line 1. A nozzle 5 of a polyurethane spraying device is installed on the polyurethane resin spraying gantry 2, and the main unit of the polyurethane spraying device is connected to the nozzle 5. A permeable brick conveying trolley 3 is installed on the automatic permeable brick conveyor line 1 below the polyurethane resin spraying gantry 2. The permeable bricks 4 are laid flat on the platform of the permeable brick conveying trolley 3 with the surface layer facing upwards. A conveying trolley drive device 6 is installed on the automatic permeable brick conveyor line 1 to the left of the permeable brick conveying trolley 3. An ultraviolet emitting gantry 7 is installed on the automatic permeable brick conveyor line 1 to the right of the polyurethane resin spraying gantry 2, and an ultraviolet emitter 8 is installed on the ultraviolet emitting gantry 7. The method is characterized by the following steps: Step 1: Select a polyurethane spraying equipment that can input single-component materials, and select a UV polyurethane resin with a viscosity of 300-500 mPa.s as the adhesion material for the surface of the permeable brick 4. The second step is to input the UV polyurethane resin selected in the first step into the polyurethane spraying equipment. Third, under normal room temperature conditions, the permeable brick conveying trolley 3 is controlled by the conveying trolley drive device 6 to travel from left to right on the permeable brick automatic conveying line 1. When the permeable brick 4 on the platform of the permeable brick conveying trolley 3 passes the polyurethane resin spraying gantry 2, the UV polyurethane resin is sprayed onto the surface of the permeable brick 4 through the nozzle 5. Furthermore, by controlling the traveling speed of the permeable brick conveying trolley 3, the weight of the UV polyurethane resin evenly sprayed on each square meter area of the permeable brick surface is 80-110 grams. Fourth step: When the sprayed permeable brick 4 is conveyed to the underside of the ultraviolet emitting gantry 7, the ultraviolet rays emitted by the ultraviolet emitter 8 irradiate the surface of the permeable brick 4 on the permeable brick conveying trolley 3, causing the UV polyurethane resin on the surface of the permeable brick 4 to solidify. The surface of the imitation stone permeable brick is made into a lychee surface or a convex and concave surface with a significant undulating effect, which is more suitable for coating by this method.
[0027] The surface of the permeable brick 4 on the permeable brick conveyor trolley 3 is exposed to ultraviolet light for 15-20 seconds.
Claims
1. A surface attachment device for permeable bricks used in paving, comprising an automatic permeable brick conveyor line (1) and permeable bricks (4), characterized in that, A polyurethane resin spraying gantry (2) is installed on the permeable brick automatic conveyor line (1). A nozzle (5) of a polyurethane spraying equipment is installed on the polyurethane resin spraying gantry (2). A main unit of the polyurethane spraying equipment is connected to the nozzle (5). Weather-resistant polyurethane for the adhesion of the permeable brick surface is installed in the main unit of the polyurethane spraying equipment. A permeable brick conveying trolley (3) is installed on the permeable brick automatic conveyor line (1) below the polyurethane resin spraying gantry (2). Permeable bricks (4) are laid flat on the platform of the permeable brick conveying trolley (3) with the surface layer facing upwards. The permeable bricks on the left side of the permeable brick conveying trolley (3) are... On the automatic conveyor line (1), there is a conveyor trolley drive device (6). The conveyor trolley drive device (6) controls the permeable brick conveyor trolley (3) to move from left to right through the polyurethane resin spraying gantry (2). At the same time, the polyurethane spraying equipment sprays weather-resistant polyurethane through the nozzle (5) onto the surface of the permeable brick (4), thereby achieving an adhesion coating on the surface of the permeable brick. The weather-resistant polyurethane in the polyurethane spraying equipment is a UV polyurethane resin with a viscosity of 400-500 mPa.s. The weight of the UV polyurethane resin evenly sprayed on the surface of the permeable brick per square meter is 80-110 grams.
2. The overlay attachment device for permeable bricks used in paving ground according to claim 1, characterized in that, The polyurethane spraying equipment is a polyurethane spraying equipment that accepts two-component materials.
3. The overlay attachment device for permeable bricks used in paving ground according to claim 2, characterized in that, The weight of the weather-resistant polyurethane resin mixture uniformly sprayed on the surface of the permeable brick (4) per square meter is 80-110 grams.
4. The overlay attachment device for permeable bricks used in paving ground according to claim 3, characterized in that, On the permeable brick automatic conveyor line (1) to the right of the polyurethane resin spraying gantry (2), there is an ultraviolet emitting gantry (7), and an ultraviolet emitter (8) is installed on the ultraviolet emitting gantry (7). The ultraviolet rays emitted by the ultraviolet emitter (8) irradiate the surface of the permeable brick (4) on the table of the permeable brick conveyor trolley (3) passing through the ultraviolet emitting gantry (7), causing the UV polyurethane resin on the surface of the permeable brick (4) to solidify.