The mine with the advantages of composite pipe properties of novel PE rapid development
Coal mine gas drainage pipe with polyethylene in recent years to double the speed of development, the latest development of the steel skeleton of silane crosslinked polyethylene composite pipe rapidly and the multilevel fast silane crosslinked polyethylene composite pipe, in reducing the cost and safety more advantages, the profit space is more impressive, as the rapid development of the field of stars.
Coal mine safety has attracted national attention, requires the improvement of safety input, and pipeline safety input current of 60-70%., the country is to vigorously promote the coal mine with polyethylene pipe, used to replace the glass steel pipe, steel pipe, cast iron pipe and PVC pipe. Over the years, coal mine gas pipe, for drainage pipe, pressure pipe, tube for shotcrete has been used in the steel or cast iron pipe. Experience shows that, there is a heavy metal pipe, easy corrosion, easy scaling, maintenance costs high, handling installation difficulties fatal weakness. Then the glass pipe and the PVC pipe, but the glass steel pipe weight, shock resistant and easy to aging, is not convenient to use. And the PVC pipe difference, impact brittle and wounding disadvantage, not suitable for the use of coal mine.
The development of mine pipes with PE performance and rapid
Polyethylene pipes for underground mine use has the advantages of ordinary polyethylene pipe, also has good and stable permanent flame retardant, antistatic properties. It is using polyethylene as the main raw material, adding a certain proportion of the flame retardant and antistatic agents are mixed processing, through the special craft processing uniformly distributed in the resin. Mine used polyethylene pipe is the present domestic PE pipe and a new direction of development, its application will bring a strong role for the development of coal mine and other fields.
Gas pipe with polyethylene pumping underground coal mine in 2002 in Shandong Zibo, but until 2004 began to be recognized by the state and the Bureau of mines, and began to increase rapidly, the annual increase in more than 200%.
Due to the rapid increase in prices of raw materials and competition intensifies, resulting in a decline in profit margins. In order to improve the competitiveness of products, the industry's new developed steel skeleton composite silane cross-linked polyethylene pipe and fast multilevel fast silane crosslinked polyethylene composite pipe.
Composite pipe with a new mine
Coal mine with steel skeleton of silane crosslinked polyethylene composite pipe is fast for a coal mine underground drainage pipes, ventilation, spraying, pumping gas, it is intermediate with wire layer model of four layer structure rapid silane crosslinked polyethylene pipe, polyethylene pipe in addition to meet requirements for coal mine, each layer can be on the polyethylene is modified so that the pipe with high strength, high wear resistance, high impact and low cost. The steel wire layer structure can be divided into three categories:
One is the structure of wire network, is characterized in that a plurality of steel high speed knitting mesh, the utility model has the advantages of high pressure bearing capability (normal working pressure up to 3-4Mpa, blasting pressure up to 7-8Mpa), disadvantage is the caliber cannot achieve great (now the biggest to the phi 315).
Two is a single wire winding structure, has the features of 2-4 root of the wire and has the advantages of high speed winding, bearing capacity with less wire to achieve higher ring stiffness, the wall thickness can be greatly reduced (normal working pressure up to 1-2Mpa, blasting pressure can reach up to 3-4Mpa), and can achieve large caliber, disadvantage is the high cost of making high speed winding machine. Also can not multilayer polyethylene, a layer of thermal shrinkage and coated on the outside of an outer layer of.
Three is the double wire winding structure, a plurality of steel at low speed characteristic is wound into a mesh structure, the left and right way. Advantages of using low filament winding machine, high ring stiffness and bearing capacity under the wall thickness can be greatly reduced (normal working pressure up to 1-2Mpa, blasting pressure can reach up to 3-4Mpa), and can achieve large caliber, due to the shortcomings of low speed winding and the wire number is too much, in the winding process there will be not easy even distribution phenomenon.
Because of the mine with polyethylene drainage pipe diameter is generally less than 315mm, while the pressure is up to 4-5Mpa, so the diameter below 315 by using steel wire braided tube, with more than 315 single wire winding pipe.
Coal mine with the multilevel fast silane crosslinked polyethylene composite pipe is used for a coal mine underground drainage pipes, ventilation, spraying, pumping gas, it is a polyethylene pipe three or four layers of structure, in addition to meet the polyethylene pipe requirements for coal mine, each layer of polyethylene was modified so that the pipe with high strength, high wear resistance, high shock resistance and low cost, equipment and mine its required equipment steel skeleton polyethylene composite pipe.
The dual advantages of both products, policy
The advantages of steel skeleton polyethylene composite pipe and coal mine with multilayer polyethylene composite pipe with mine:
1) flame retardant, antistatic: polyethylene pipes for underground mine use antistatic, flame-retardant component are uniformly distributed in the pipe body, antistatic and flame retardant properties are not affected by the use of a long time. Antistatic, flame-retardant properties are in line with national standards, specific sites suitable for underground flammable, explosive.
2) light weight, convenient installation: polyethylene pipes for underground mine use small density, unit weight is only 1/8 of steel pipe, glass pipe 1/3, and polyethylene pipes for underground mine use not only transportation, convenient installation, use can greatly reduce the labor intensity of the workers in the mine, improve work efficiency.