The Form And Category of the High Pressure Hose Joint
(Last Updated On: December 5, 2021)
The high-pressure hose is one of the components of the hydraulic wrench/tensioner system. There are many types of high-pressure hoses and joint forms, and the joints of different hoses are usually used in different industries.
The joints of various high-pressure hose assemblies: mainly divided into A, B, C, D, E, F, H type, flange type and other national standards, including 30-degree bend, 45-degree bend, 75-degree bend and 90-degree bend, as well as inch system , American and other national standard connectors.
The oil pipes used in the coal industry mainly include hydraulic support hoses. In recent years, the pressure requirements for hydraulic supports in some coal mines have increased, and some steel wire braided hoses cannot meet their performance requirements and require the use of steel wire wound tubing. In addition, in order to prevent coal dust pollution and improve production safety during underground mining in coal mines, the types of coal mine oil pipes have been increased, such as coal seam water exploration and hole sealer telescopic oil pipes, which are used to inject water into coal seams before fully mechanized mining in underground coal mines. , Grouting and other operations.
The 21st century offshore oil development strategy proposes to focus on the development of offshore and shallow oil fields. Therefore, the oil industry requires the use of shallow oil pipelines in addition to drilling oil pipes and vibrating oil pipes. Shallow-sea submarine oil pipelines have been produced, but floating or semi-floating oil pipelines and deep-sea submarine oil pipelines still rely on imports. With the implementation of the offshore oil development strategy, the requirements for the performance of oil pipes in offshore oil exploration will continue to increase.
Classification of high pressure hose
High-pressure tubing is mainly divided into high-pressure steel wire braided tubing and high-pressure steel wire wound tubing according to the manufacturing process:
It has the function of making the conveying medium bear pressure and protecting the steel wire from corrosion. The outer rubber layer protects the steel wire from damage. The steel wire (ф0.3-2.0 reinforcement layer) layer is the framework material for reinforcement. High-pressure steel wire wound tubing 1. The structure of high-pressure steel wire wound tubing is mainly composed of inner rubber layer, middle rubber layer, 2, 4, 6 steel wire winding layers, and outer rubber layer. The inner rubber layer has the function of making the conveying medium bear pressure and protecting the steel wire from corrosion. The outer rubber layer protects the steel wire from damage. The steel wire (ф0.3-2.0 reinforced layer) layer is a framework material for reinforcement.
High-pressure steel wire reinforced hydraulic tubing is mainly used for mine hydraulic supports, oilfield development, suitable for engineering construction, lifting and transportation, metallurgical forging, mining equipment, ships, injection molding machinery, agricultural machinery, various machine tools, and various industrial sectors, etc. Its mechanized and automatic hydraulic system can transport petroleum based (such as mineral oil, soluble oil, hydraulic oil, fuel oil and lubricating oil) and water-based (such as emulsion, oil-water emulsion and water) liquids with certain pressure (higher pressure) and temperature, and liquid transmission. The highest working pressure can reach 70-120Mpa.
Product specification range:
4SP type, four-layer steel wire wound medium pressure oil pipe. 4SH type, four-layer steel wire wound high-pressure hose. R12 type, four-layer steel wire wound high temperature and medium pressure oil pipe under severe conditions. R13 type, multi-layer steel wire wound high temperature and high pressure oil pipe under severe conditions. R15 type, multi-layer steel wire wound high-temperature and ultra-high pressure tubing under harsh conditions.
High-pressure steel wire wound tubing consists of an inner rubber layer, a middle rubber layer, four or more alternately wound steel wire reinforcement layers and an outer rubber layer.
High pressure steel wire braided tubing
It is mainly composed of a liquid-resistant synthetic rubber inner rubber layer, a middle rubber layer, a steel wire braided layer of I, II, and III layers, and a weather-resistant synthetic rubber outer rubber layer. The inner rubber layer has a steel wire for protecting the conveying medium under pressure. It is not corroded, the outer rubber layer protects the steel wire from damage, and the steel wire layer is the framework material for reinforcement.
High-pressure steel wire reinforced hydraulic tubing is mainly used for mine hydraulic supports, oilfield development, suitable for engineering construction, lifting and transportation, metallurgical forging, mining equipment, ships, injection molding machinery, agricultural machinery, various machine tools, and various industrial sectors, etc. Its mechanized and automated hydraulic system can transport petroleum-based (such as mineral oil, soluble oil, hydraulic oil, fuel, lubricating oil) and water-based (such as emulsion, oil-water emulsion, water) liquids with a certain pressure and temperature, etc and liquid transmission.
oil -40℃～100℃, air -30℃～50℃, water emulsion +80℃ below
Range of specifications:
Production process of high pressure tubing:
The inner layer rubber, the middle layer rubber and the outer layer rubber are mixed according to the formula with a mixer. Use an extruder to extrude the inner tubing and wrap it on the soft core or hard core coated with a release agent (liquid nitrogen freezing method also does not require a tube core). The calender is pressed into a middle-layer rubber sheet, and the release agent is added to rewind and cut into the specified width according to the process requirements. Wind the inner oil pipe containing the tube core on a copper-plated steel wire or copper-plated steel wire rope on a winding machine or braiding machine, and simultaneously wind the middle rubber sheet between every two layers of copper-plated steel wire or copper-plated steel wire rope on the winding machine or braiding machine. Binding at the beginning and end of the steel wire (some early winding machines need to pre-stress and shape the copper-plated steel wire). Cover the extruder again with the outer layer of rubber, and then wrap the lead or cloth vulcanization protective layer, vulcanize through a vulcanizing tank or salt bath, and finally remove the vulcanization protective layer, pull out the tube core, crimp the upper pipe joint, and sample and press for inspection.
The above is the introduction about the high-pressure hose. In the hydraulic wrench system, the high-pressure hose plays the role of transmitting hydraulic oil and is one of the important components of the system. Therefore, when replacing hydraulic hoses, you must choose high-quality hydraulic hoses to ensure the smooth operation of the hydraulic wrench or bolt tensioner system.