The application of new PE composite pipe for mine
Publish in：2024-09-29 17:00:59 Browse (245)
Memo：Coal mine with polyethylene gas pipe appeared in 2002 in Zibo, Shandong Province, but until 2004 began to be recognized by the state and major mining bureaus, and began to grow rapidly, and now the annual increase of more than 200%, due to the rapid rise in raw material prices and competition, resulting in a decline in corporate profit margins. In order to improve the competitiveness of products,
Coal mine with polyethylene gas pipe appeared in 2002 in Zibo, Shandong Province, but until 2004 began to be recognized by the state and major mining bureaus, and began to grow rapidly, and now the annual increase of more than 200%, due to the rapid rise in raw material prices and competition, resulting in a decline in corporate profit margins. In order to improve the competitiveness of products, the industry has recently developed a steel skeleton fast silane cross-linked polyethylene composite pipe and multi-layer fast silane cross-linked polyethylene composite pipe, the following is a small series of Xianji network I will give you a brief introduction!
The steel skeleton fast silane cross-linked polyethylene composite pipe for underground coal mine is a kind of pipe used for water supply and drainage, ventilation, shotcrete, gas pumping, etc. It is a new four-layer fast silane cross-linked polyethylene pipe with steel wire layer in the middle. In addition to meeting the requirements of polyethylene pipe for coal mine, Each layer can be modified with polyethylene so that the pipe has high strength, high wear resistance, high impact and low cost. For the different structure of the steel wire layer can be divided into three categories:
The first is the wire mesh structure, which is characterized by the high-speed weaving of multiple steel wires into a network, the advantage is that it has a high pressure capacity (the normal working pressure reaches 3-4Mpa, the bursting pressure can reach 7-8Mpa), the disadvantage is that the caliber can not be very large (now the maximum is Φ315).
The second is the single-layer wire winding structure, which is characterized by the high-speed winding of 2-4 steel wires. The advantage is that the use of fewer steel wires can achieve higher ring stiffness, and the wall thickness can be greatly reduced under a certain pressure capacity (normal working pressure can reach 1-2Mpa, blasting pressure can reach 3-4Mpa), and large caliber can be achieved. The disadvantage is the high cost of high-speed winding mechanism. It is also possible to cover the outer bread with a heat-shrinkable tape instead of multiple layers of polyethylene.
The third is the double-layer wire winding structure, which is characterized by a number of steel wires winding into a network structure at low speed, and is completed by left and right rotation. The advantage is that the low-speed winding machine is used to wind, to achieve high ring stiffness and a certain pressure capacity under the wall thickness can also be greatly reduced (normal working pressure can reach 1-2Mpa, blasting pressure can reach 3-4Mpa), and can achieve large caliber, the disadvantage is that due to low-speed winding and the number of steel wire head too much, in the winding process will not be easy to evenly distributed phenomenon.
Because the diameter of polyethylene water supply and drainage pipe in coal mine is generally less than Φ315mm, and the pressure reaches 4-5Mpa, the steel wire braid pipe is used below Φ315, and the single-layer steel wire winding pipe is used above Φ315.
Multi-layer fast silane crosslinked polyethylene composite pipe used in coal mine is also a pipe used in coal mine for water supply and drainage, ventilation, shotcrete, gas extraction, etc. It is a polyethylene pipe with three or four layers structure, in addition to meeting the requirements of polyethylene pipe used in coal mine. Each layer can modify the polyethylene so that the pipe has high strength, high wear resistance, high impact and low cost, and the equipment required is common with the equipment used in the steel skeleton polyethylene composite pipe in the coal mine.
Coal mine with polyethylene solid wall full plastic pipe has been developed for three years, in the technology has been relatively mature, and coal mine with steel skeleton polyethylene composite pipe and coal mine with multi-layer polyethylene composite pipe is just developed new products, competitiveness is very strong, high added value, profits are more than 40%, the market is in the rising stage, the amount is constantly increasing. The recognition of users is also increasing, and the caliber of the development of large caliber (Φ1200mm or more), is a very worthy of attention and development of the field.
At this stage, national policies, local policies and the internal requirements of major mining bureaus require the coal mines to vigorously promote polyethylene pipes to replace steel pipes and glass pipes, which has policy advantages.
The underground polyethylene pipe has the advantages of low density, light weight, high strength, good toughness, corrosion resistance, convenient connection and high safety factor, which can greatly reduce the labor intensity of coal miners and high safety factor. At this stage, the goal of each mining pipe manufacturer is only limited to gas pumping and air supply, and the mine water supply pipe is less involved (the pressure reaches 3-4Mpa), but the amount of water supply pipe is more than 6 times the amount of gas pipe, which is worthy of attention.
Recently, Zhejiang Kangrun Machinery Co., Ltd. has developed a special multi-purpose production technology for the above two new types of pipes. After the steel skeleton polyethylene composite pipe equipment is removed from the steel winding machine or braiding machine, the multi-layer polyethylene composite pipe equipment is formed. If the material used in each layer is consistent, it is the polyethylene pipe for coal mine, that is to say, The equipment can be multi-purpose and can expand its application.
The steel skeleton fast silane cross-linked polyethylene composite pipe for underground coal mine is a kind of pipe used for water supply and drainage, ventilation, shotcrete, gas pumping, etc. It is a new four-layer fast silane cross-linked polyethylene pipe with steel wire layer in the middle. In addition to meeting the requirements of polyethylene pipe for coal mine, Each layer can be modified with polyethylene so that the pipe has high strength, high wear resistance, high impact and low cost. For the different structure of the steel wire layer can be divided into three categories:
The first is the wire mesh structure, which is characterized by the high-speed weaving of multiple steel wires into a network, the advantage is that it has a high pressure capacity (the normal working pressure reaches 3-4Mpa, the bursting pressure can reach 7-8Mpa), the disadvantage is that the caliber can not be very large (now the maximum is Φ315).
The second is the single-layer wire winding structure, which is characterized by the high-speed winding of 2-4 steel wires. The advantage is that the use of fewer steel wires can achieve higher ring stiffness, and the wall thickness can be greatly reduced under a certain pressure capacity (normal working pressure can reach 1-2Mpa, blasting pressure can reach 3-4Mpa), and large caliber can be achieved. The disadvantage is the high cost of high-speed winding mechanism. It is also possible to cover the outer bread with a heat-shrinkable tape instead of multiple layers of polyethylene.
The third is the double-layer wire winding structure, which is characterized by a number of steel wires winding into a network structure at low speed, and is completed by left and right rotation. The advantage is that the low-speed winding machine is used to wind, to achieve high ring stiffness and a certain pressure capacity under the wall thickness can also be greatly reduced (normal working pressure can reach 1-2Mpa, blasting pressure can reach 3-4Mpa), and can achieve large caliber, the disadvantage is that due to low-speed winding and the number of steel wire head too much, in the winding process will not be easy to evenly distributed phenomenon.
Because the diameter of polyethylene water supply and drainage pipe in coal mine is generally less than Φ315mm, and the pressure reaches 4-5Mpa, the steel wire braid pipe is used below Φ315, and the single-layer steel wire winding pipe is used above Φ315.
Multi-layer fast silane crosslinked polyethylene composite pipe used in coal mine is also a pipe used in coal mine for water supply and drainage, ventilation, shotcrete, gas extraction, etc. It is a polyethylene pipe with three or four layers structure, in addition to meeting the requirements of polyethylene pipe used in coal mine. Each layer can modify the polyethylene so that the pipe has high strength, high wear resistance, high impact and low cost, and the equipment required is common with the equipment used in the steel skeleton polyethylene composite pipe in the coal mine.
Coal mine with polyethylene solid wall full plastic pipe has been developed for three years, in the technology has been relatively mature, and coal mine with steel skeleton polyethylene composite pipe and coal mine with multi-layer polyethylene composite pipe is just developed new products, competitiveness is very strong, high added value, profits are more than 40%, the market is in the rising stage, the amount is constantly increasing. The recognition of users is also increasing, and the caliber of the development of large caliber (Φ1200mm or more), is a very worthy of attention and development of the field.
At this stage, national policies, local policies and the internal requirements of major mining bureaus require the coal mines to vigorously promote polyethylene pipes to replace steel pipes and glass pipes, which has policy advantages.
The underground polyethylene pipe has the advantages of low density, light weight, high strength, good toughness, corrosion resistance, convenient connection and high safety factor, which can greatly reduce the labor intensity of coal miners and high safety factor. At this stage, the goal of each mining pipe manufacturer is only limited to gas pumping and air supply, and the mine water supply pipe is less involved (the pressure reaches 3-4Mpa), but the amount of water supply pipe is more than 6 times the amount of gas pipe, which is worthy of attention.
Recently, Zhejiang Kangrun Machinery Co., Ltd. has developed a special multi-purpose production technology for the above two new types of pipes. After the steel skeleton polyethylene composite pipe equipment is removed from the steel winding machine or braiding machine, the multi-layer polyethylene composite pipe equipment is formed. If the material used in each layer is consistent, it is the polyethylene pipe for coal mine, that is to say, The equipment can be multi-purpose and can expand its application.
The existing polyethylene pipe production line can also be upgraded to multi-layer composite pipes or steel skeleton composite pipes, so that the investment can be minimal and the return is maximum, and the original pipe products will not be affected after the transformation. For new enterprises can invest steel skeleton composite pipes at one time, according to different customers can make different pipes, reduce costs, improve profit value and obtain the maximum rate of return.
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