Hook fence is made of hook fence for the net surface of the protective net, barrier grid. Material PVC wire, stainless steel wire, good low carbon steel wire, galvanized wire, iron wire hook mesh is made of hook mesh machine for various materials of wire hook knitting, can be divided into two kinds of folding, screwing lock.
This process has no mold, low processing cost, easy forming, can process a variety of shapes and other characteristics are widely used. But the products of the guardrail are powder impregnated plastic. According to whether it needs heating, it is divided into hot dipping and cold dipping. According to the raw materials of dipping, it can be divided into liquid dipping and powder dipping. Hot-dip galvanizing, as a metal anticorrosion method, is usually to put the steel structure to be derusted into the zinc liquid at about 500℃, so that the zinc layer is attached to the surface of the steel structure.
Because the large roll galvanized wire alloy element in ore iron, can make copper through the thickness, hardness, impact force, strength, library rate, elongation, so alloy iron in the exercise of good iron, is an important auxiliary element. Galvanized wire and general wire is very different, general wire is cheap, and because the iron is not very stable, easy to rust in the wet place, so the stability is not very good, the life is not very long.Railway is not only the main artery of national economy, but also an important means of mass transportation to protect people’s travel. It plays an important role in the process of economic and social development. Therefore, the safety issue is an important guarantee for railway transportation, one is a symbol of the railway transportation enterprise product quality, the other is also the focus of social attention. The off-road collision accident is one of the focus of public opinion on the railway industry. How to grasp the off-road safety management, eliminate the off-road collision accident from the source, maximize the protection of people’s life and property safety, and reduce the non-operational cost of railway enterprises is a key content of railway safety work in the new era. We should install protective nets on both sides of the railway, which are also barbed wire protective nets, so as to prevent accidents.
The strength of the hook mesh should be satisfied: when the vehicle is traveling at 80 kilometers per hour, the hook mesh will not fall into the river when it bumps against the rail at a 15 degree Angle. The shape and color of the hook mesh should be in harmony with the surrounding natural environment. The phenomenon planning of the important Bridges of the hook network should be done well. When the bridge crosses important traffic lines, such as expressways, urban rail transit, expressways, railway trunk lines, etc., the hook mesh should add the protective mesh on the pavement of the bridge deck.Select cut silk first to ensure that the raw material of the silk is exactly the raw material you need, the raw material will be used well. Choose high straightness, so that the length of the truncation will be the same, will not show a lot of length difference, the length of the truncated wire is a very important element to choose the truncated wire.
Compared with other galvanizing processes, galvanized steel wire has low cleaning requirements before plating. However, under the current trend of increasing the quality level of galvanized layer, some pollutants brought into the plating tank are obviously harmful. Because cleaning galvanized coating wastes a lot of time and reduces production, it is very important to properly clean and effectively rinse the substrate before electroplating.
High quality galvanized wire in general, the zinc layer attached to the surface of the wire is relatively thick, so when we buy galvanized wire, as long as we look at the thickness of the zinc layer machine, we can generally judge whether the quality of galvanized wire is high quality.
If the zinc coating is good, but when the light comes out in 3% nitric acid, there is a dark shadow on the coating, and the film is brown when passivation occurs, which may be caused by foreign metal impurities such as copper or lead in the galvanized liquid. When there is a problem in the process of galvanizing, check the temperature and current density first, and then measure and adjust the content of zinc and sodium hydroxide in the bath through the analysis of the bath. Whether DPE levels are low can be determined by Hull cell test.
There are many kinds of specifications for crack resistant welding mesh used in the construction industry. The commonly used specifications are as follows:
The protective duration of the galvanized layer of large roll galvanized wire is closely related to the thickness of the coating. Generally speaking, in relatively dry main gas and indoor use, and in harsh environmental conditions, the thickness of galvanized layer needs to be very high. Therefore, the environmental impact should be considered when choosing the thickness of galvanized layer. After passivation treatment of galvanized layer, a layer of bright old and beautiful color passivation film can be generated, which can significantly improve its protective performance.
As we all know, the use of hexagonal net for protection can protect the natural environment while protecting the bridge, which can not only green the ecological environment, but also prevent soil erosion.