Large caliber steel wire rubber hose
In the process of mining and ore transportation, the transportation pipeline needs to simultaneously cope with three major challenges: high pressure, wear and tear, and complex working conditions. However, large-diameter steel wire rubber hoses (resistant to 20MPa high pressure, specialized for mining transportation) have become one of the core components of the mining transportation system with targeted design, and their performance directly affects the efficiency and safety of mining operations.
1、 Product core feature: Suitable for high-pressure transportation needs in mines
The design of large-diameter steel wire rubber hose (resistant to 20MPa high pressure) revolves around the pain points of mining scenarios, with core characteristics focused on three dimensions: "compressive strength, structural stability, and wear resistance", ensuring reliable operation in high-intensity transportation.
From the perspective of pressure resistance performance, a rated working pressure of 20MPa can meet the high-pressure transportation needs of media such as "ore slurry, tailings water, hydraulic oil" in mines. Mining transportation systems often create high-pressure environments due to terrain differences and pump pressure, and ordinary rubber hoses are prone to bulging and cracking due to insufficient pressure resistance. However, this type of rubber hose is designed with "multi-layer steel wire weaving reinforcement layer" to disperse pressure into the steel wire structure, avoiding local pressure concentration. At the same time, the outer rubber layer adopts an anti-aging formula, which can resist ultraviolet rays and temperature changes in open-pit mining operations, and extend the outdoor use cycle.
In terms of structural design, the "large diameter" feature (usually ranging from 50-300mm) is suitable for the high flow transportation needs of mines: the daily ore transportation volume of mines can reach thousands of tons, and small diameter pipelines are prone to transportation congestion due to insufficient flow. However, the large diameter design, combined with the smooth rubber material on the inner wall, can reduce the flow resistance of the medium, lower the energy consumption of the pump body, and avoid the accumulation and blockage of ore particles in the pipeline. In addition, some products adopt the process of "steel wire spiral reinforcement+integrated inner and outer rubber layers", which can improve the pipeline's anti twisting ability and adapt to the complex laying environment of mines (such as bending and vibration scenes).
2、 Exclusive adaptability to mining transportation scenarios
The difference between mining transportation scenarios and ordinary industrial scenarios is significant. The adaptability of large-diameter steel wire rubber hoses (resistant to 20MPa high pressure) is mainly reflected in three aspects: "medium compatibility, environmental tolerance, and safety protection".
From the perspective of medium adaptation, the "ore slurry and tailings water" transported by mines often contain high hardness particles (such as quartz sand and iron ore debris), and some tailings water is weakly acidic. Ordinary rubber hoses are prone to leakage due to inner wall wear and corrosion. The inner rubber layer of this type of hose is mostly made of wear-resistant and corrosion-resistant materials such as nitrile rubber and chloroprene rubber, with a hardness of Shore A70 or above, which can resist particle erosion. At the same time, the corrosion resistance rate to weak acidic and alkaline media is over 95%, avoiding aging and peeling of the inner rubber layer.
In terms of environmental adaptation, mining operations often face problems such as high temperatures (up to 60 ℃ in the equipment heat dissipation area in summer), low temperatures (as low as -20 ℃ in outdoor environments in winter), and high levels of dust. The reinforced steel wire of the rubber hose has undergone galvanizing and rust prevention treatment to prevent dust from entering the steel wire layer and causing rust; The temperature resistance range of the inner and outer adhesive layers covers -40 ℃~120 ℃, and can still maintain elasticity under extreme temperature differences, avoiding low-temperature brittleness and high-temperature softening.
In terms of safety protection, if a pipeline ruptures in the high-pressure conveying system of a mine, it may cause medium leakage, equipment damage, and even personal injury. This type of rubber hose is designed with a "burst pressure ≥ 40MPa" (far exceeding the working pressure of 20MPa) to reserve safety redundancy. At the same time, some products are equipped with a "pressure warning line". When the pressure inside the pipeline approaches the rated value, the warning line will trigger a visual prompt, making it easy for staff to promptly investigate pressure abnormalities.
3、 Installation and maintenance: key to extending service life
The installation and maintenance of large-diameter steel wire rubber hoses (resistant to 20MPa high pressure) directly affect their effectiveness and require special requirements for mining operations to be followed.
There are three points to pay attention to during the installation process: first, "matching the diameter with the pump body and joints" - the corresponding diameter should be selected according to the flow rate of the conveying medium to avoid pressure loss caused by a large diameter, or insufficient flow caused by a small diameter; The second is "bending radius control" - the minimum bending radius of this type of hose is usually 5-8 times the diameter of the pipe. If it is excessively bent during installation, it will cause deformation of the steel wire reinforcement layer and reduce the pressure resistance performance. Therefore, sufficient space needs to be reserved at the bending point; The third is "fixing and protection" - in areas with strong mining vibrations (such as near crushers), pipe clamps are needed to fix the rubber hose to the bracket, and buffer pads are installed at the joints connected to the equipment to reduce the wear of the interface caused by vibration.
In terms of maintenance, it is necessary to conduct regular inspections, cleaning, and pressure monitoring on a daily basis: check the appearance of the rubber hose every week, and if cracks are found in the outer rubber layer or exposed steel wires are found, they should be replaced in a timely manner; Clean the inner wall every month to avoid increased wear caused by the accumulation of mineral particles; Every quarter, use a pressure detector to test the actual pressure of the pipeline to ensure that it does not exceed the rated value of 20MPa. At the same time, check the sealing condition of the joints to prevent medium leakage. In addition, rubber hoses that have been idle for a long time should be stored in a dry and ventilated place, avoiding direct sunlight and heavy objects to prevent rubber aging and structural deformation.
4、 Selection key points: avoid adaptation misconceptions
When selecting large-diameter steel wire rubber hoses (resistant to 20MPa high pressure), mining enterprises need to avoid the misconception of "only looking at pressure and ignoring the scenario", and focus on three core indicators: first, "the particle hardness of the actual conveying medium" - if conveying high hardness iron ore slurry, products with higher wear resistance levels of the inner rubber layer should be selected; The second is the "working environment temperature range" - open-pit mines should prioritize the selection of rubber hoses with a wide temperature resistance range, while underground mines should pay attention to the flame retardant performance of rubber hoses (some scenarios need to comply with mine flame retardant standards); The third is "interface type" - select matching interfaces based on the joint specifications of existing equipment in the mine (such as flanges, quick couplings) to avoid installation delays caused by incompatible interfaces.
In addition, it is necessary to confirm the "pressure test report" of the product - regular products should provide a 20MPa rated pressure test report issued by a third-party testing agency to ensure that the actual pressure resistance meets the standard and avoid safety hazards caused by "false standard pressure".
In summary, large-diameter steel wire rubber hoses (resistant to 20MPa high pressure) have become key components of mining conveying systems through targeted performance design and scene adaptation. Reasonable selection, standardized installation and maintenance can not only improve transportation efficiency, but also reduce safety risks in mining operations, providing guarantees for the continuous and stable operation of mines.