Fence net for roads or railways
By setting shallow pits on the surface of the wire and applying adhesion promoter and PVC layer, the problem of easy falling off and corrosion of the PVC layer of the guardrail net is solved, and the corrosion resistance and service life of the guardrail net are improved.
Patent Information
- Application Number
- CN202422368446.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The PVC layer of the existing road or railway guardrail net has poor adhesion and is prone to fall off. It is prone to corrosion in areas with large temperature difference between day and night, shortening its service life.
A shallow pit is provided on the surface of the metal wire, and an adhesion promoter layer, a primer layer and a PVC layer are successively coated. An irregular shallow pit is formed by chemical corrosion to enhance adhesion, and a PVC layer of 0.5 mm-1 mm thick is provided on the outside of the metal core.
It improves the adhesion of the PVC layer, prevents falling off, enhances the corrosion resistance of the guardrail net, extends the service life, and can be maintained in areas with large temperature differences between day and night.
Smart Images
Figure CN223088328U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wire meshes, and particularly relates to a guardrail mesh for highways or railways. Background Art
[0002] On both sides of highways or railways, in order to prevent animals or people from crossing the highways or railways, guardrail meshes with columns in the middle need to be installed on both sides of the highways or railways. The existing guardrail meshes for highways or railways include a mesh body welded by warp wires and weft wires. The warp wires and weft wires include metal cores. On the metal mesh body, PVC is attached to the surfaces of the warp wires and weft wires of the metal wire mesh by dipping to improve the corrosion resistance of the mesh sheet and extend the service life of the guardrail mesh for highways or railways. The existing guardrail meshes for highways or railways have the following defects: First, the surface of the metal wire is smooth, the adhesion of PVC on the surface of the metal wire is poor, PVC is easy to fall off or there are gaps between the PVC layer and the metal wire, and rainwater or dust is easy to contact the metal wire mesh, causing corrosion of the metal wire mesh and shortening the service life of the guardrail mesh; Second, because the guardrail mesh for highways or railways is located outdoors, especially in the north, the temperature difference between day and night is large, and the thermal expansion and contraction coefficients of the metal wire and the PVC layer are different, which is easy to cause the PVC layer to fall off. Summary of the Utility Model
[0003] The problem to be solved by the utility model is to provide a guardrail mesh for highways or railways with a PVC layer that is not easy to fall off, good corrosion resistance, and long service life.
[0004] To solve the above problems, the technical solution adopted by the utility model is: it includes a mesh body welded by warp wires and weft wires. The warp wires and weft wires include metal cores. Shallow pits are arranged at intervals on the outer surface of the metal core of the warp wires. An adhesion promoter layer is arranged on the radial outer side of the metal core. A primer layer is arranged on the radial outer side of the adhesion promoter layer. A PVC layer is arranged on the radial outer side of the primer layer.
[0005] Its additional technical features are:
[0006] The shallow pits are in irregular shapes;
[0007] The depth of the shallow pits is 0.1mm - 0.3mm;
[0008] The thickness of the PVC layer is 0.5mm - 1mm.
[0009] Compared with the prior art, the guardrail net for roads or railways provided by the present utility model has the following advantages: First, since it includes a net body welded by warp wires and weft wires, the warp wires and weft wires include metal cores. On the outer surface of the metal core of the warp wire, shallow pits are arranged at intervals. On the radially outer side of the metal core, an adhesion promoter layer is provided. On the radially outer side of the adhesion promoter layer, a primer layer is provided. On the radially outer side of the primer layer, a PVC layer is provided. First, the net body is cleaned with a cleaning solution to remove dust and rust stains on the surface of the net body. Then, the cleaned net body passes through an etching mechanism for shallow pits with a dropper in the upper part consistent with the direction of the weft wire and a water receiving tank in the lower part. The dropper contains dilute hydrochloric acid, copper sulfate solution or other corrosive solutions that can corrode metal wires. At the corresponding position of the dropper and the warp wire, there is a liquid outlet. During the forward movement of the net body, the corrosive solution in the dropper is intermittently dropped onto the warp wires of the net body. When the solution falls onto the warp wires, a small amount of the corrosive solution will splash onto the weft wires. The excess corrosive solution falls into the lower water receiving tank. The solution remaining on the warp wires or weft wires chemically reacts with the warp wires or weft wires respectively, forming irregular shallow pits on the surfaces of the warp wires and weft wires. After cleaning or blowing again, the adhesion promoter layer and the primer layer are respectively sprayed. Finally, the PVC layer is sprayed on the radially outer side of the primer layer. The surface of the warp wire has irregular shallow pits, and the bottom and side surfaces of the shallow pits are not smooth, increasing the bonding strength and shear resistance between the adhesion promoter layer and the surface of the warp wire. Even in the northern regions with large temperature differences between day and night, the PVC layer, the primer layer and the adhesion promoter layer will not fall off from the metal wires, and the relative depth of the shallow pits is not deep, which will not have too much impact on the quality of the mesh; Second, since the shallow pits are irregular in shape, the processing is more convenient, and the bonding strength between the adhesion promoter layer and the surface of the warp wire is greater; Third, since the depth of the shallow pits is 0.1 mm - 0.3 mm, it can not only ensure that the strength of the warp wire is not affected, but also ensure that the PVC layer does not fall off; Fourth, since the thickness of the PVC layer is 0.5 mm - 1 mm, it not only avoids the corrosion of the metal core, but also plays a heat preservation role for the metal core, avoiding the elongation or shortening of the metal core caused by large external temperature differences. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 is a schematic structural diagram of the guardrail net for roads or railways of the present utility model;
[0011] Figure 2 is a schematic structural diagram of the metal core of the warp wire
[0012] Figure 3 is a cross-sectional view of the warp wire;
[0013] Figure 4 is Figure 3 A - A sectional view of
[0014] Figure 5 It is a cross-sectional view of the weft wire. Specific embodiments
[0015] The following further elaborates in detail on the structure and working principle of the guardrail net for highways or railways of the present utility model in conjunction with the accompanying drawings and specific embodiments.
[0016] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown, the structural schematic diagram of the guardrail net for highways or railways of the present utility model. The guardrail net for highways or railways of the present utility model includes a net body 3 welded by warp wires 1 and weft wires 2. The warp wires 1 and weft wires 2 include metal cores 4. Shallow pits 5 are arranged at intervals on the outer surface of the metal core 4 of the warp wire 1. An adhesion promoter layer 6 is arranged on the radially outer side of the metal core 4. A primer layer 7 is arranged on the radially outer side of the adhesion promoter layer 6. A PVC layer 8 is arranged on the radially outer side of the primer layer 7.
[0017] First, while the coiled net body 3 is being unrolled, it is cleaned with a cleaning solution to remove the dust and rust stains on the surface of the net body 3. Then, the cleaned net body 3 passes through a dropper with a direction consistent with the weft wire direction above and a shallow pit etching mechanism with a water collecting tank below. The dropper contains dilute hydrochloric acid, copper sulfate solution or other corrosive solutions that can corrode metal wires. The dropper has liquid outlets at positions corresponding to the warp wires. During the forward movement of the net body 3, the corrosive solution in the dropper is intermittently dropped onto the warp wires 1 of the net body 3. When the solution drops onto the warp wires, a small amount of the corrosive solution will splash onto the weft wires 2. The excess corrosive solution falls into the water collecting tank below. The solution remaining on the warp or weft wires chemically reacts with the warp or weft wires respectively, forming irregular shallow pits on the surfaces of the warp and weft wires. After being cleaned or blown again, the adhesion promoter layer 6 and the primer layer 7 are respectively sprayed. Finally, the PVC layer 8 is sprayed on the radially outer side of the primer layer. Then, the net body 3 is coiled up. The surface of the warp wire has irregular shallow pits, and the bottom and side surfaces of the shallow pits are not smooth, increasing the bonding strength and shear resistance between the adhesion promoter layer and the surface of the warp wire. Even in the northern regions with large temperature differences between day and night, the PVC layer, primer layer and adhesion promoter layer will not fall off from the metal wires, and the relative depth of the shallow pits is not too deep, which will not have too much impact on the quality of the mesh.
[0018] The shallow pits 5 are of irregular shapes, which are more convenient to process and have a greater bonding strength between the adhesion promoter layer and the surface of the warp wire.
[0019] The depth of the shallow pits 5 is 0.1 mm - 0.3 mm, which can not only ensure that the strength of the warp wire is not affected, but also ensure that the PVC layer does not fall off.
[0020] The thickness of the PVC layer 8 is 0.5 mm - 1 mm, which not only avoids the corrosion of the metal core, but also plays a heat preservation role for the metal core, avoiding the elongation or shortening of the metal core caused by large external temperature differences.
[0021] The protection scope of the present utility model is not limited to the above embodiments. As long as the structure is the same as that of the highway or railway guardrail net of the present utility model, it falls within the protection scope of the present utility model.
Claims
1. Guardrail net for highway or railway, including a net body welded by warp wires and weft wires, the warp wires and weft wires include metal cores, characterized in that: Shallow pits are provided at intervals on the outer surface of the metal core of the warp thread. An adhesion promoter layer is provided on the radially outer side of the metal core. A primer layer is provided on the radially outer side of the adhesion promoter layer. A PVC layer is provided on the radially outer side of the primer layer.
2. The guardrail net for highways or railways according to claim 1, characterized in that: The shallow pits are of irregular shapes.
3. The guardrail net for highways or railways according to claim 1 or 2, characterized in that: The depth of the shallow pits is 0.1 mm - 0.3 mm.
4. The guardrail net for highway or railway according to claim 1, characterized in that: The thickness of the PVC layer is 0.5 mm - 1 mm.