Hydraulic ferrules cold deformation, flaring, flattening no cracks

Hydraulic ferrules is one of the three parts of the card sets of pipe joints (ferrules, nuts, seamless steel pipe) composed. Hydraulic ferrules working principle is the seamless steel insert card kit, ferrule nut using inconsistent card sets, card kit seamless steel blade evenly cut, form an effective seal. Hydraulic ferrules type straight pipe hydraulic flanges  are widely used in oil refining, chemical, oil, gas, food, pharmaceutical, and other instruments. Hydraulic ferrules high accuracy, good finish, inside and outside the walls of the heat pipe no oxide layer, the hydraulic hose assembly wall of cleanliness is good, pipe withstand high pressure. Hydraulic ferrules cold deformation, flaring, flattening no cracks, deformation and can make a variety of complex mechanical processing. Hydraulic ferrules joints inside and outside the installation need to take over the interface and connection fittings are handling clean. Be sure to take over the mouth of the polished smooth surface can not have glitches and uneven surfaces.

High-pressure hose hidden precautions

First, choose a brand , quality assurance business , quality assurance, sales and service companies generally better manufacturing , high quality requirements .
Second, pay attention to the hydraulic fittings high-pressure hose assembly installation and operation. Not blindly cut production .Third, the high-pressure hose for industrial products, the use of units should be aware of their required product specifications. Blindly buy one of the factors also contributed to the quality problems .Fourth, as the user , but also pay attention to the high-pressure hose storage environment.

Metal hose selection

For a certain length and gauge metal hose, its ability to withstand stress and shock have certain limits, therefore, when used to choose according to the actual situation. Generally used with a nominal hydraulic hoses pipe same nominal diameter, length of the hose under the sink array of tanks, lateral displacement temperature deformation, misalignment, and other factors to produce an earthquake to determine. Corrugated metal hydraulic ferrules, nets and joint composed of three parts, bellows are made ​​of stainless steel, with good flexibility, small longitudinal rigidity and bending stiffness, can work within a radius of curvature of the nominal, with strong corrosion resistance and good temperature stability. Nets from the strengthening of the role of the metal hose with a larger carrying capacity. Therefore, the metal hose with shock, subjected to bending, absorb stress.

Overview of the hose

Hoses are divided into: stainless steel hose, metal hose, corrugated hose, plastic hoseCorrosion resistance of stainless steel hydraulic ferrule depends on the content of chromium, when added to the 10.5% of chromium, the atmospheric corrosion resistance of steel significantly increased, but the higher chromium content, while still being improved corrosion resistance, but obvious. The reason is that when the steel with a chromium alloying treatment, the type of change has become similar to the surface oxide formed on the surface of pure chromium oxide of the metal.Chromium-rich oxide protects the surface of this tightly adherent to prevent further oxidation. Such thin hydraulic fittings oxide layer, through which you can see the natural luster of stainless steel surfaces of stainless steel has a unique surface. Moreover, if the damaged surface, and atmospheric reactions exposed steel surface will self-repair, re-formation of this "passive film", continue to play a protective role.

Development of hydraulic hose assembly

After a few years of rapid development of reform and opening up , China's hydraulic hose assembly industry has made tremendous progress , their results were witnessed world , due to the development of Jic hydraulic fittingsassembly industry , the whole process of industrialization has also been driven up, get up vigor and vitality. Now, in the 21st century , especially after the party's 18 , China's economic development has entered a new phase, corresponding , for many industrial sectors and departments have also made ​​new demands. Therefore, as a hydraulic hose assembly industry , the need to establish a new development ideas, promote their own development and to adapt to the new era of development plans and ideas.First, companies should establish a people-oriented business ideas. Fully excavated talent, use of personnel , with talents for the development of enterprises to make a great contribution. For this reason , companies should be based on their actual situation , the construction of a mining standards and procedures of talent, and talent to make a different for different but appropriate arrangements to allow these people to give full play the initiative in different positions forhydraulic tube fitting industry to contribute their value.Second, enterprises should also be market-oriented, proactive , rather than passive waiting for the market ruling. With a lot of uncertainty on the market , these uncertainties , for the enterprise, is a potential threat , it will affect the interests and long-term development of enterprises. Therefore, enterprises should establish a set of internal hydraulic hose industry market response plans for a variety of problems that may arise , emergency preparedness , in order to achieve the purpose of being prepared .

use of the high-pressure hose size

When the high-pressure hose be withheld , will always produce withhold too tight or too loose phenomenon, and these phenomena often lead to adverse effects of high pressure hose . Today we say it is the size of the amount withheld would it have any effect on the high-pressure hose . We carried out by the following detailed understanding .Withhold the amount and rate of withholding high pressure hose and fittings assembly when the improper or joint structure and material , size selection is unreasonable, can lead to high pressure hose and fittings withholding too hydraulic hose assemblysor too loose will cause early damage to the joints .When assembled , if the withholding amount is too small, that is between the high pressure hose connector and cut through the loose , high pressure hose there may emerge in the role of oil in the early use from the joint ; If withholding is too large, then the connector and hose too hydraulic tube fitting , easily lead to hose inner being localized damage, cracks , directly into the high-pressure oil from the ruptured steel layer , and then he went to the wire along the gap between the spray coat tails , or has fled somewhere along the wire layer build up , so that the outer layer of plastic to produce drum kits and even rupture . Hoses and connectors in the assembly, if the withholding too fast, likely to cause damage to the plastic layer and the wire break, so that premature failure of the hose in use .The above information is very detailed description of the effect of the size of the amount withheld for the use of high-pressure hose produced , so we need considerable attention when using this withholding his dosage size is accurate, whether the mutation will produce high pressure hose , etc. problems should close attention.

Hydraulic hose assembly is the basis of hydraulic system components

Hydraulic hose assembly is the basis of hydraulic system components. Various hydraulic system is mainly used in construction machinery , metallurgy, mining machinery, and easy installation and removal of the . It is composed of high-pressure steel wire braided or twisted hydraulic hose assembly and steel fittings made ​​by special equipment withhold conduct hydraulic power transmission or conveying water, gas, oil pressure medium to ensure circulation of the liquid and transfer the liquid energy.
Hydraulic hoses need proper protection. Due to the complexity of hydraulic hose varieties , structural diversity, coupled with different conditions , so the length of life , not only on their quality , but also depends on the proper use and maintenance . So even if the product has high quality , if not properly used and maintained , will seriously affect the quality and longevity of its use , even a serious accident should not have occurred , causing damage to property . First of all, dedicated specifically to deal with . hydraulic hose assemblysand hose assembly can only be designed for transporting materials , other materials can not be used to send . Secondly , the use of the pressures within the . Hose and hose assembly should not be used in excess of the design working pressure ( including shock pressure ) . Third, the transportation of materials moderate temperature . Under hose and hose assembly conveyed medium temperature normal circumstances, should not exceed -40 ℃ - +120 ℃. Fourth, given the appropriate use of space hose , not bent. Hose and hose assembly should not be less than the minimum bend radius under the hose , to avoid bending or folding occurs near the pipe joints , otherwise it will impede hydraulic transmission and delivery of materials or damage to the hose assembly. Finally , keep the hose clean. Hose and hose assembly should be kept clean , inside should rinse ( especially acid output tubes, spray tubes, mortar tubes ) . To prevent foreign objects into the lumen , hinder the transport fluid , damage to the device .

Many factors will affect the use of hose assembly

Many factors will affect the use of the hose assembly. The first is the size of the hose. Inner diameter of hydraulic hose assemblysto the right, if it is too small, will affect efficiency. If the inside diameter is too large, will affect the overall system performance of the play. Therefore, it is important to select the appropriate inner diameter. Second, hydraulic hoses will also affect the temperature range of use. If the hydraulic hose working environment temperature exceeds the specified range, then the hydraulic hose pressure capacity will thus be greatly reduced. Experts suggest that if the high or low temperature working environment, should be put on the hydraulic hose jacket. In addition to the above two factors, the use of hydraulic hose assembly Hose working pressure is also affected by the impact stress and fatigue life, impact bending radius and chemical compatibility and other factors.
Hydraulic hose assembly in our lives is very wide, in the mining industry, agriculture and industrial sectors have a lot of use. It is transmitted through water and gas or oil substance hydraulic power to ensure adequate fluid energy during operation.

By utilizing high pressure hose and connector assembly and buckling mode selection is improper

By utilizing high pressure hose and connector assembly and buckling mode selection is improper. Or joint structure, material, size selection is not reasonable, can lead to joint and hose pressure too tight or too loose, causing joint early damage. The assembly, if the withholding amount is too small, crimping connector and hose pressure hydraulic flangestoo loose, under the action of oil pressure hose disengages from the joint may at the initial stage of use; if the withholding amount is too large, then the buckling pressing joint and hose pressure too tight, easily lead to hose inner layer by local damage, deformation, produce crack, high pressure oil from weak, rupture directly into the wire layer, then along the rear of the jet slot channeling to coat steel wires, or has been along the wire layer channeling somewhere accumulates, the outer layer of the hydraulic tube fitting drum kits and even cracking. Hose and connector in the assembly, if press speed too fast, easy to cause damage and fracture of the glue in the wire layer, so that the hose damage early in use. In addition, the joint design is not reasonable, Jerry, the processing quality is bad, can also cause the glue in the joint damage; if the improper material selection, not up to the high pressure hose assembly requirements. Will shorten the service life of the high pressure hose.

The inner wall of the high pressure hose for oil resistant rubber

The inner wall of the high pressure hose for oil resistant rubber, the middle braided wire (steel wire braided hose) or winding steel wire (wire wound hose)
The inner wall of the high pressure hose for oil resistant Hydraulic pipe fittings, the middle braided wire (steel wire braided hose) or winding steel wire (wire wound hose). The poor quality of the hose will appear: tube wall is uneven; steel wire braided tightly (wire small stroke), too loose (steel large stroke) or the number of the steel wire is too small; hose compression deformation (elongation, shortening or bending deformation (national standard) larger wire stroke control within plus or minus 3); the outer layerhydraulic hoses air tightness differences lead to corrosion of the steel wire (main forms: bare wire); the inner layer glue sealing difference and make the high-pressure oil easily into the wire layer; adhesive layer and the steel wire layer adhesion deficiency. This will make the hose to bear force is reduced, finally appear in the weak point of tube wall burst. Especially in the inner layer, poor air tightness of words, a compression, it Water Leakage, then directly burst pressure.

Because plastic coated hose connector design unreasonable phenomenon caused by the failure

Pack plastic hose connector design is essential, which is the core technology of hose assemblies. In actual operation, including plastic Hydraulic adapters connector design is often not a good grasp of various key points, it will cause a variety of failures. Because plastic coated hydraulic hose assemblys connector design failures caused by the unreasonable phenomenon is most prevalent are withheld at the inner tube longitudinal cracks appear and circumferential cracks are two, there are other symptoms, but not common. There are the following two: 1 withhold longitudinal cracks appeared at the inner tube site withhold the end of the sleeve, the inner tube vertical microcracks appear, once a crack running through, it will result in failure of two hydraulic tube fitting assemblies withheld at the inner tube circumferential cracks appear in actual use, and the testing process is also one of the more common symptoms. Inner tube circumferential cracks appeared after the weak link here will become, along with the gradual extension circumferential cracks, often in the form here leak, resulting in failure of hose assemblies.

Card sets of pipe joints without welding process

Card sets of pipe joints have a solid connection , pressure capacity, high temperature resistance, good sealing and repeated installation and maintenance easy, safe and reliable. Card sets hydraulic ferrule joints pipe working principle is to insert the card kit, using the ferrule nut , inconsistent card sets, cut hydraulic adapters and seal. It is connected with hydraulic adapter without welding , is conducive to fire, explosion , and high-altitude operations , and can eliminate the evils of welding accidentally . So it is refining, chemical , oil, gas , food, pharmaceutical , instrumentation, piping and other systems controlled device in a more advanced connections . For oil, gas , water, etc. piping connections .

Joint leakage prevention, protection of life

In the hydraulic system, both the metal pipe coupling, or hydraulic hose fittings, there are prone to leakage problems. For ferrule fittings, mostly due to pipeline subject to greater external force or impact, so that the card sleeve loose or deformed face caused by leaking pipe, you should check whether the card holder out of round, whether the defect edge, whether the pipe ends intact and nut, compression level, etc., while also eliminating pipeline force.Hydraulic pipe fittings hose fittings for flared fittings, mostly due to excessive flaring, quality, undesirable or multiple demolition, resulting in flared cracks or deformation caused by leaks, then you can be re-flared front truncated. If you use a male and female cone top pressure seal, the leakage is mostly due to two cone damage, Hydraulic adapters hose fittings available on the cone abrasive grit grinding. In some with "о" or outer-ring face seal by the occasion.

Card sets of pipe joints relationship between the structure

Card sets of pipe joints pipe working principle is to insert the card kit, using the ferrule nut, inconsistent card sets, cut Hydraulic pipe fittings and seal. It is connected with the pipe without welding, is conducive to fire, explosion, and high-altitude operations, and can eliminate the evils of welding accidentally. So it is refining, chemical, oil, gas, food, pharmaceutical, instrumentation, piping and other systems controlled device in a more advanced connections. For oil, gas, water, etc. piping connections.Ferrule tube fitting consists of three parts: the connector body, card sets, nuts. When the card sleeve and nut cap on hydraulic adapter into the fitting body, tighten the nut on the outer end fittings and connector body cone fit evenly inside edge bite into seamless, form an effective seal

Preswaged sets of pipe joints of the most important aspects of pre

Preswaged sets of pipe joints of the most important aspects of pre-( A ) pre-installed ① card preloaded ring couplings most important aspect of a direct impact on the reliability of sealing . Generally require a dedicated preheater . Small diameter connector can be pre-installed in a vise . In practice, with a connector as the parent , the nut , ferrule onto the tube can be pressed . There are card sets straight couplings , sleeve type end through turn heads, ferrule tube fittings and other types . I found that even in the same factory shipment , these types of connector body tapered hole depth is often not the same , the result is caused by a leak , and this problem is often overlooked. The correct approach is , the pipe end what kind of connector body connection , the corresponding connection terminal is preloaded with the same type of connector , so to avoid possible leakage problems . ② pipe end should be flush . After sawing the pipe should be hydraulic hose fitting wheel and other tools , and deburring , cleaning with high-pressure air to blow before use. ③ pre-installed , you should try to keep the tube and the coaxial connector body , if the pipe deflection is too large will cause seal failure. ④ preloaded force should not be too large so that the ferrule tube embedded in the outer wall just inside the edge , card sets shall have no deformation . During pipeline connection, then the provisions of the tightening force assembled . ф6-1 card sets tightening force is 64-1 15n, 16фmmr 259n, ф18mm for 450n. If the pre- deformed when the card holder will lose the seal.
( Two ) . Prohibit adding sealant filler. It was sealed in order to achieve better results, apply sealant put on the card , the results sealant being washed into hydraulic adapter, hydraulic components causing blockage damping hole fault .
( III). Connecting pipe should be sufficient deformation of the tube margin , to prevent the tube subjected to tensile strength .
( Four ) . Connecting pipe should avoid subjecting it to lateral forces , lateral forces caused Mifengbuyan over the General Assembly .
( Five ) . Connecting pipe should be a good one , to avoid multiple disassemble , otherwise it will deteriorate the sealing performance