CN101042204A - High-pressure resistant hose and manufacturing method thereof - Google Patents
High-pressure resistant hose and manufacturing method thereof Download PDFInfo
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- CN101042204A CN101042204A CN 200610092898 CN200610092898A CN101042204A CN 101042204 A CN101042204 A CN 101042204A CN 200610092898 CN200610092898 CN 200610092898 CN 200610092898 A CN200610092898 A CN 200610092898A CN 101042204 A CN101042204 A CN 101042204A
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Abstract
The present invention provides a high pressure resistant hose of low longitudinal deformation quantity under a pressurized condition, capable of being stably laid in a narrow pipe layout space, and of good vibration absorbing properties. A hose body having an inner surface side layer 13, a reinforcement layer 15 and an outer surface side layer 17 laminated and including constant inner diameter, outer diameter and wall thickness over whole length is formed. End part sides in a longitudinal direction of the hose body are expanded to form a main part 7 of a small diameter, a caulking part 9 of a large diameter and a taper part 1. Braiding angle of the main part 7 is set to 48 degree or more and less the 54 degree. Braiding angles of the caulking part 9 and the taper part 11 are set to 68 degree or less with exceeding 57 degree, roughly 61 degree or less with exceeding 55 degree from original range 48 degree or more and less than 54 degree by expansion.
Description
Technical field
The present invention relates to high-pressure resistant hose of a kind of automotive air conditioning device flexible pipe etc. and the method for making this high-pressure resistant hose.
Background technique
The flexible pipe that is used for the automotive air conditioning device flexible pipe has following structure: by the gut threads member or (for example reinforce yarn, helically coiling gut threads member) back-up coat of making is formed on the outside of internal surface rubber layer, the outer side covers of described back-up coat has outer surface rubber layer (for example, with reference to patent documentation 1).In order to reduce internal flow is that the infiltration of refrigeration agent prevents global warming, and the inboard of the interior surface layers of this class flexible pipe is typically provided with the resin blocking layer.
Start pusher side and vehicle body side because this class aircondition flexible pipe is used for connecting, therefore this aircondition flexible pipe preferably has the shock-absorbing properties that enough inhibition engine luggines, vibration of compressor or vehicle operating process make the vibration transfer such as vehicle body vibration of component cooperation.Although the structure on resin blocking layer has been improved the resistivity of aircondition flexible pipe to the refrigeration agent infiltration, above-mentioned shock absorption characteristic or vibration damping characteristic have but been weakened.Therefore, the very length that the aircondition flexible pipe need be made (for example, when the distance of flexible pipe connection is approximately 300mm, it is long that described flexible pipe manufactures about 400mm), thereby the unlikely deficiency that causes shock-absorbing properties in the aircondition flexible pipe of the structure that makes the resin blocking layer, the perhaps unlikely shock-absorbing properties that weakens the aircondition flexible pipe.
But under a lot of situations, the engine compartment of motor vehicle all has been crowded with component etc., thereby can not provide or guarantee enough pipe-line system spaces, and therefore, methods such as the structure on employing resin blocking layer and increase hose length are improper usually.Thereby consider that the short as far as possible aircondition flexible pipe of manufacturing replaces the structure on resin blocking layer.When flexible pipe enough in short-term, can reduce by flexible pipe and/or from the infiltration of the refrigeration agent of flexible pipe.Very short but when having enough shock-absorbing properties when the hose length of structure, provide this can be contained in narrow pipe-line system the space in have lower refrigeration agent permeability and well the aircondition flexible pipe of shock-absorbing properties be possible.
By the way, in the aircondition flexible pipe, inject the deficiency that refrigeration agent can cause shock-absorbing properties to flexible pipe under the high pressure.Not when flexible pipe injects refrigeration agent, shock-absorbing properties is affected hardly.That is, when injecting refrigeration agent under the high pressure in flexible pipe, flexible pipe and refrigeration agent form one, thereby make described flexible pipe hardening and cause the loss of its shock-absorbing properties.And the hardened degree of flexible pipe depends on the sectional area (the flexible pipe cross section radially or the area of section) of described flexible pipe inside.Sectional area is big more, the easy more hardening of flexible pipe, and sectional area is more little, and flexible pipe is not easy hardening more.
Therefore, consider that the aircondition flexible pipe of a kind of minor diameter of shaping is to guarantee shock-absorbing properties.But,, for example comprise the fitting of insertion tube and socket accessory (tightening up accessory) at the end of described aircondition flexible pipe (hose main body) jointing accessory.When described hose main body diameter hour on whole length, the insertion tube of described fitting must be inserted the end of described hose main body (tightens up or part to be tightened up, more specifically swaged forging or treat the swaged forging part), the described swaged forging part of radial expansion simultaneously (the swaged forging part that will be tightened up by the socket accessory).But the aircondition flexible pipe has 5MPa or the above cracking pressure of 5MPa usually, inserts resistance and becomes very big, and the end of described insertion tube being inserted described hose main body is actually very difficult.
In order to address the above problem, consider to take measures to make a kind of hose main body that comprises minor diameter major component and major diameter swaged forging part.Described insertion tube is inserted in the swaged forging part of diameter greater than described major component diameter, and the socket accessory of installing on the described swaged forging part of the swaged forging periphery is partly to tighten up (swaged forging) to insertion tube with described swaged forging.In this respect, for example patent documentation 2 and 3 attachment portion that discloses a kind of flexible pipe that will be connected with pipe forms large diameter technology.
[patent documentation 1] JP-A, 7-68659
[patent documentation 2] JP-B, 3244183
[patent documentation 1] JP-B, 8-26955
And, when to inner supply pressure fluid of described flexible pipe such as refrigeration agent, the aircondition flexible pipe that is installed in the narrow pipe-line system space should be had less tensile strain rate (absolute value).If the tensile strain rate during pressurized is bigger, the length change of flexible pipe is very big during the supplied with pressurized refrigeration agent so, thereby makes described flexible pipe and on every side component etc. contact or adjacency, perhaps by on the component around being pressed against tightly etc.Consequently, breakage may take place or deviate from between the space of described pipe-line system in flexible pipe.And the tensile strain rate during the flexible pipe pressurized depends on the braid angle or the winding angle of the reinforcing yarn of back-up coat.That is to say that when interior pressure acted in the flexible pipe, described braiding or winding angle were tending towards being returned to about 55 ° (54.7 °, critical angle).Thereby,, tend to radial expansion and axial shrinkage during the flexible pipe pressurized when braiding or winding angle during less than about 55 °.When braiding or winding angle during greater than about 55 °, tending to axial length during the flexible pipe pressurized increases and radial contraction.When braiding or winding angle when being about 55 ° (54.7 °, critical angle), even if the flexible pipe pressurized does not have axially and the distortion of radial direction yet.Thereby, hose main body tighten up part or swaged forging part when radially increasing, be necessary partly to go up the braiding of gut threads member or winding angle and these parts length relation between the two tensile strain rate when preventing described flexible pipe or hose main body pressurized (absolute value) increase by adjusting major component, tapering part and swaged forging respectively.
The hose main body that comprises minor diameter major component and major diameter swaged forging part obtains by following manner, be that the flexible pipe matrix is formed on its whole length and has identical diameter, and this diameter equals the diameter of major component, make the end radial expansion of described axial contrast by the axial contrast end that presses a mandrel into the flexible pipe matrix, thereby form major diameter swaged forging part.For fear of cause described axle can not be pressed into the axial contrast end of described flexible pipe matrix because of described flexible pipe matrix flexing, be necessary the axial middle part of described flexible pipe matrix is kept or remain on keeping in the mould by keeping mould.Described maintenance mould comprises some maintenance mould sections, and these keep the mould section to cooperate the formation receiver portion.The axial middle part of described flexible pipe matrix is divided to clamp securely by the described accommodation section and is kept.
The receiver portion that forms by the mould section that cooperates to have a shape of cross section that compresses described flexible pipe matrix very effective.When compression was divided in the described accommodation section or compressing described flexible pipe matrix, the described accommodation section divided the radial expansion of inner flexible tube matrix can not take place or be restricted.Thereby axle is pressed into described flexible pipe matrix can not cause described flexible pipe matrix flexing.
Yet, when forming the receiver portion of the described flexible pipe matrix of compression, might be at the material of the cooperation contact process outer surface layer of described maintenance mould section from extruding between the described maintenance mould section and forming flash at the hose main body of making.Post-processed after this makes hose main body make bothers very much.
Summary of the invention
In order to address the above problem, one object of the present invention be to provide a kind of novel have good shock-absorbing properties for example during pressurized tensile strain rate or variable quantity very little, and/or can stably be installed in the narrow pipe-line system space high-pressure resistant hose.
In addition, another object of the present invention is to provide a kind of method of making high-pressure resistant hose, wherein, can avoid the flexing of described flexible pipe matrix during the axial end portion of the described flexible pipe matrix of radial expansion, and/or do not need the subsequent treatment of trouble.
According to the present invention, provide a kind of novel high-pressure resistant hose.The cracking pressure of described high-pressure resistant hose is equal to or greater than 5MPa.Described high-pressure resistant hose comprises the hose main body and the fitting of multi-layer structure, and this hose main body comprises interior surface layers, be included in the back-up coat of the gut threads member that the outside braiding of described interior surface layers or helically reel and the outer surface layer that is positioned at the described back-up coat outside as coating.Described hose main body has major component and is positioned at that described hose main body axial end portion (for example, each axial end portion that opposes) locates tightens up part or part to be tightened up, and describedly tightens up part or waits to tighten up the diameter of the diameter of part greater than major component.Fitting is installed on described tightening up on the part regularly, and have insertion tube and tighten up accessory, wherein said insertion tube inserts the tighten up part of diameter greater than described major component diameter, the described accessory that tightens up is installed on described tightening up on the periphery partly, is tightened on the described insertion tube in order to this is tightened up part.Described hose main body also has at the tapering part that tightens up between part and the major component.The angle of the gut threads member that the braiding of back-up coat or helically are reeled on the major component (braiding or winding angle) is 48 ° to 54 ° (not comprising 54 °), tighten up angle (braiding or winding angle) on the part greater than 57 ° and be less than or equal to 68 °, the angle on the tapering part (braiding or winding angle) is for approximately greater than 55 ° (critical angles) and be less than or equal to 61 °.The braiding of the gut threads member that braiding or helically are reeled on the tapering part or winding angle are gone up the angle of braiding or helically coiling gut threads member less than tightening up part, and the ratio of length (axial length) and the free length (free axial length) of hose main body of major component is 65% to 93% when not having pressure.Hose main body tightens up the molded or moulding of part radial expansion herein.Thereby the insertion tube of described fitting is inserted into tightening up in the part of radial expansion.Therefore, for example be equal to or greater than in the high pressure hose of 5MPa in cracking pressure, the density of the braiding of back-up coat or coiling gut threads member (braiding or rolling density) is equal to or greater than 50%, adopt minor diameter to increase shock-absorbing properties even if comprise the major component in the major part of hose main body or long zone etc., described fitting is connected to described hose main body (tightening up part), especially insertion tube is inserted or to be pressed into described hose main body (tightening up part) not difficult yet.The external diameter of the insertion tube before inserting can be made as and equal or be substantially equal to the described internal diameter (internal diameter of radial expansion) that tightens up part.Described back-up coat can comprise braiding gut threads member, perhaps also can comprise the gut threads member that helically is reeled.Braiding or rolling density refer to the ratio (%) of gut threads member and the back-up coat gross area.More specifically, the formula of described braiding or rolling density is: (yarn width * yarn number/(2 * π * interior surface layers or near the external diameter * cos. braiding or the winding angle of the layer below the back-up coat)) * 100.In fact, to the tapering part that tightens up part one end, the braiding of major component or winding angle change to the braiding of tightening up part or the braiding or the winding angle of winding angle from an end of major component.Braiding among the present invention on the tapering part or winding angle refer to the braiding or the winding angle at the axial centre place of described tapering part.
For example, described hose main body is constructed in the following manner.At first, preparation or preparation comprise back-up coat and diameter is identical on whole length flexible pipe matrix.Described back-up coat comprises braiding or the gut threads member or the yarn of reeling, and braiding or winding angle on its whole length are identical.And, the axial end portion of the described flexible pipe matrix of radial expansion (for example, axial contrast end).Described braiding or winding angle refer to gut threads member or the yarn angle with respect to the flexible pipe axis.According to the present invention, the braiding of back-up coat or winding line member or the yarn angle (braid angle or winding angle) on major component (that is flexible pipe matrix) is more than or equal to 48 ° and less than 54 °.Therefore, after making described flexible pipe matrix, effortlessly leading thread is to an end (for example, axial contrast end) of the described flexible pipe matrix that expands.When pressing in being subjected on the hose main body, described major component length reduces.At this moment, in case the angle of the braiding of back-up coat or helically coiling gut threads member is less than 48 ° on the major component, the length of major component is significantly shunk during the hose main body pressurized.Therefore, the tensile strain rate of the whole free space of hose main body is little when making pressurized, be necessary to form long tapering part and tighten up part, described tapering part and tighten up part and go up the angle of the braiding of back-up coat or the gut threads member that helically is reeled greater than critical angle.Like that, the operation of the flexible pipe trouble that can become is installed the flexible pipe difficulty that also can become in narrow pipe-line system space.And, in case the angle of the gut threads member that the braiding of back-up coat or helically are reeled on the major component is equal to or greater than 54 °, because the radial expansion of described flexible pipe matrix end, the resistance of described flexible pipe radial expansion can become greatly, and the tensile strain rate during pressurized can be very big and operation meeting flexible pipe is pretty troublesome.
The angle of the gut threads member that the braiding of back-up coat or helically are reeled on tightening up partly is made as greater than 57 ° and is less than or equal to 68 °, being made as greater than about 55 ° (referring to more precisely) and being less than or equal to 61 ° on the tapering part greater than 54.7 ° or critical angle.Thereby when pressing in being subjected on the described hose main body, major component length reduces, and tightens up part and the growth of tapering part length.Thereby the tensile strain rate of (the whole free space of described cartilage main body) (absolute value of tensile strain rate during pressurized) is little generally to keep hose main body.When tightening up angle that part goes up the braiding of back-up coat or the gut threads member that helically is reeled when being equal to or less than 57 °, tighten up the variation of degree that part goes up length and increase major component when being not enough to offset pressurized.Therefore, the tensile strain rate on the whole free space of described hose main body (absolute value) may become very big.And before braiding or the angle of helically coiling gut threads member surpassed 68 °, radial expansion is described, and to tighten up part (an axial contrast end of described flexible pipe matrix or several axial contrast end) be difficult.Similar, when the angle of the gut threads member that the braiding of back-up coat or helically are reeled on tapering part was equal to or less than about 55 ° (more precisely, referring to 54.7 ° or critical angle), the length of tapering part can not increase during pressurized.Therefore, the tensile strain rate on the whole free space of described hose main body (absolute value) may become very big.And, when the angle of the gut threads member of reeling when the braiding of back-up coat on the described tapering part or helically surpasses 61 °, described major component or tighten up the angle that part goes up the gut threads member that braiding or helically reel and can become excessive.(internal diameter of major component is about 9mm comprising the minor diameter major component that stands pressure in the height, or 9mm to 11mm) in the flexible pipe, little in order to keep tensile strain rate on the whole free space (absolute value), tighten up when angle that part goes up the braiding of back-up coat or helically coiling gut threads member is 66 ° to 68 ° and get final product.The angle of the gut threads member of reeling when the braiding of back-up coat on the described tapering part or helically is during less than 60 °, and tensile strain rate on the whole free space (absolute value) can be kept lessly.
Particularly, by with the described partial design radial contraction when becoming pressurized of tightening up, improved the sealability between described major component and the described fitting (insertion tube).
The length of described major component and the free length (no constraint length) of described hose main body when requiring no pressure, for example the component that tightened up by described fitting (for example, the length in the zone of the hose main body the swaged forging parts) (part), perhaps the length ratio in the zone (part) of the hose main body between the inner side of component that is tightened up by described fitting (for example, the inner side of swaged forging parts) is 65% to 93%.When the ratio of the length of major component and the free length of hose main body less than 65% the time, describedly tighten up the tensile strain rate that part and the length change of described tapering part greatly influence whole hose main body (the whole free section of described hose main body is regional), generally tensile strain rate of hose main body (absolute value) might become very big.When the ratio of the length of major component and the free length of hose main body greater than 93% the time, described length change of tightening up part and described tapering part influences the hose main body tensile strain rate of (the whole free space of described hose main body) generally hardly, the length change of major component greatly influences hose main body tensile strain rate generally in other words, and generally tensile strain rate of hose main body this moment (absolute value) still might become very big.And, when the free length of the hose main body when no pressure surpasses 300mm, be not easy described high-pressure resistant hose is installed in the narrow pipe-line system space, and the infiltration capacity of internal flow also to increase.
The tensile strain rate of the free space of hose main body is preferably-5% to 10% during pressurized.The formula of tensile strain rate is: ((free length of the hose main body during pressurized-free length of hose main body before exerting pressure)/free length of hose main body before exerting pressure) * 100.Tensile strain rate was less than-5% o'clock, and hose main body in axial direction shrinks too much during pressurized, caused described high-pressure resistant hose to be in tensioned state.Therefore, may produce very big stress in the described part of tightening up, and cause the durability of flexible pipe to reduce thus.Tensile strain rate was greater than 10% o'clock, and hose main body in axial direction expands too much during pressurized, thus described high-pressure resistant hose might contact with component etc. on every side or near and from the space of described pipe-line system, deviate from.
According to the present invention, provide a kind of new method of making high-pressure resistant hose.The high-pressure resistant hose of making comprises the hose main body and the fitting of multi-layer structure, and described hose main body comprises interior surface layers, be included in the back-up coat of the gut threads member that the outside braiding of described interior surface layers or helically reel and the outer surface layer that is positioned at the described back-up coat outside as coating.Described hose main body has major component and is positioned at that described hose main body axial end portion (for example, each axial end portion that opposes) locates tightens up part or part to be tightened up, and describedly tightens up part or waits to tighten up the diameter of the diameter of part greater than major component.Described fitting is installed on the described part of tightening up regularly.Described fitting has insertion tube and tightens up accessory, and described insertion tube inserts the tighten up part of diameter greater than described major component diameter, and the described accessory that tightens up is installed on described tightening up on the periphery partly, is tightened on the described insertion tube in order to this is tightened up part.The method of making this high-pressure resistant hose of the present invention comprises the steps: to prepare to comprise the flexible pipe matrix of the multi-layer structure of interior surface layers, back-up coat and outer surface layer, and described flexible pipe matrix has identical internal diameter, external diameter and wall thickness on its whole length; Described flexible pipe matrix is remained in the maintenance mould (holding member), make its axial end portion (for example, each axial contrast end) outwards outstanding from described maintenance mould; The axial end portion that pressurization is inserted axle (a kind of radial expansion member or bar) to remain on the flexible pipe matrix in the described maintenance mould (for example, each axial contrast end), and the described axial end portion of radial expansion (for example, each axial contrast end) tightens up part with formation; Hardenability band has the described described flexible pipe matrix of part that tightens up of formation to form described hose main body; Described fitting is fixed to tightening up on the part of described hose main body reliably.Described maintenance mould comprises some maintenance mould sections that have the component dimple respectively.Described maintenance mould section is designed to cooperate the maintenance mould that has the receiver portion (cavity) that holds and keep the flexible pipe matrix with formation.The described accommodation section divides the component dimple by combination to define.Can on the whole length that keeps the mould section, the component dimple be set, and the described accommodation section branch axially penetratingly can be arranged in the described maintenance mould.Hold described flexible pipe matrix to described accommodation section branch compressibility, and the described accommodation section branch comprises the deformation part that can make the flexible pipe matrix and withdraws from part from what this squeezed out.This high-pressure resistant hose of making has the cracking pressure that is equal to or greater than 5MPa.In this high-pressure resistant hose, back-up coat can comprise the gut threads member of braiding, also can comprise the gut threads member that helically is reeled.The gut threads member braiding of back-up coat or that helically is reeled can have and is equal to or greater than 50% density.And, described hose main body can tighten up the part and major component between form tapering part.In addition, described high-pressure resistant hose can be configured to weave on the major component or the angle (braid angle or winding angle) of helically coiling gut threads member or yarn is more than or equal to 48 ° and less than 54 °, the angle (braid angle or winding angle) of tightening up on the part is greater than 57 ° and (for example is less than or equal to 68 °, 66 ° to 68 ° angle), angle on the tapering part (braid angle or winding angle) be greater than about 55 ° (more precisely, greater than 54.7 ° or critical angle) and be less than or equal to 61 ° (for example, below 60 ° or 60 °).And the length of major component was 65% to 93% with the ratio of the free length of hose main body when described high-pressure resistant hose can be configured to not have pressure, and the free length of described hose main body is equal to or less than 300mm when not having pressure.The tensile strain rate of the free space of described hose main body is-5% to 10% during pressurized.
When described maintenance mould section is combined together, described component dimple and flexible pipe matrix bond therebetween, and limit a receiver portion to hold the flexible pipe matrix.The described accommodation section branch is formed and compresses described flexible pipe matrix.Therefore, when described component dimple in conjunction with the time, the flexible pipe matrix is compressed, forces down, tightens up or is clipped in the middle tightly.Thereby described flexible pipe matrix is contained in by in the receiver portion that keeps the mould section to form restrictedly.When described component dimple cooperated the formation receiver portion, because the flexible pipe matrix is compressed, therefore the material of described flexible pipe matrix generation deformation and this flexible pipe matrix moved.But deformation part the withdrawing from the part on being formed in receiver portion of described flexible pipe matrix withdrawed from, and therefore the material of described flexible pipe matrix does not leave between described maintenance mould section.Go up or withdraw from part or a plurality of to withdraw from part be useful at the contact position (mould mating face's position) that cooperates across two keep that mould sections top forms described.
Simple in structure in order to make, described maintenance mould can comprise a pair of mould half part or mould section (keeping the mould section).At this moment, described component dimple can form semi-circular cross-section respectively, thereby the diameter of receiver portion that makes described circular cross-section is less than the external diameter of described flexible pipe matrix.In this structure, described flexible pipe matrix can keep in the described accommodation section is divided securely.And each described component dimple can have shallow component groove in the opposition side portion, forms on the opposite side that is used for dividing in the described accommodation section and withdraws from part.In this structure, the deformation of described flexible pipe matrix part can enter withdrawing from the part on the contact position that is formed in cooperation effectively, and the flexible pipe body material is no longer left from the described accommodation section is divided.This component groove can be provided with on the whole length that keeps the mould section, and the described part that withdraws from can be arranged in the described maintenance mould with axially running through or roughly pass whole length.
Described component dimple can form semioval shape or half elliptic cross section respectively, thereby make the described accommodation section branch form avette or elliptic cross-section, its minor axis (the shortest diameter) is less than the external diameter of the flexible pipe matrix on the cooperation contact direction of described maintenance mould section, and the major axis vertical with minor axis (longest diameter) is greater than the external diameter of described flexible pipe matrix.In this structure, described flexible pipe matrix also can keep in the described accommodation section is divided securely.The described accommodation section branch has in the opposite end of described major axis or around the part that withdraws from of the opposite end of described major axis.The described part that withdraws from is arranged on the contact position of cooperation.
Can use the insertion supplementary means between the axial end portion of described flexible pipe matrix and the described axle.Can reduce the insertion resistance that acts on the described axle like this, inject described axial end portion thereby make described axle clamp-on easily or squeeze.
As mentioned above,, might provide a kind of novel infiltration capacity that good shock-absorbing properties for example can suppress internal flow that has according to the present invention, and/or can stably be installed in the narrow pipe-line system space high-pressure resistant hose.
In addition, according to the present invention, can easily produce this high-pressure resistant hose that major diameter is tightened up part that comprises, fitting is installed on described tightening up on the part reliably.
With reference to the accompanying drawings, explain the preferred embodiments of the present invention.
Description of drawings
Fig. 1 is the perspective view of high-pressure resistant hose of the present invention.
Fig. 2 is the hose main body multi-layer structure figure of the hose main body of described high-pressure resistant hose.
Fig. 3 is the sectional view of described high-pressure resistant hose.
Fig. 4 shows the flexible pipe matrix.
Fig. 5 is the structural drawing that keeps mould.
Fig. 6 shows the flexible pipe matrix and is maintained at the state that keeps in the mould.
Fig. 7 is the structural drawing of the receiver portion of flexible pipe matrix when being maintained in the described maintenance mould.
Fig. 8 is the structural drawing of another kind of receiver portion.
Fig. 9 shows axle.
Figure 10 shows the state in the described axle insertion flexible pipe matrix.
Figure 11 shows hose main body.
Embodiment
High-pressure resistant hose 1 among Fig. 1 is as for example aircondition flexible pipe of motor vehicle.Described high-pressure resistant hose 1 comprises hose main body 3, and metal joint accessory (shaft coupling or joint) 5 is assembled to two axial opposite end of described hose main body reliably.Hose main body 3 has major component 7, the swaged forging part that is positioned at its axial contrast end that is positioned at its axial middle part or treats swaged forging part (tightening up part) 9,9 and the tapering part 11,11 between described each major component 7 and swaged forging part 9.Described major component 7 forms elongated tubular product such, and has identical internal diameter and external diameter on its whole length.Each swaged forging part 9 is a tubular form, and its internal diameter and external diameter are greater than the internal diameter and the external diameter of described major component 7.Each tapering part 11 is all tapered, and its diameter reduces to described major component 7 gradually from described swaged forging part 9.
As shown in Figure 2, comprising internal surface rubber layer (interior surface layers) 13 on the whole length for the hose main body 3 of multi-layer structure, reinforcing yarn (gut threads member) by braiding and be formed at the back-up coat 15 on the periphery of described interior surface layers 13 and be formed at outer surface rubber layer (outer surface layer) 17 on the periphery of described back-up coat 15.Described back-up coat 15 directly is formed on the periphery of described interior surface layers 13, and described outer surface layer 17 directly is formed on the periphery of described back-up coat 15.Wherein, reference symbol θ represents braiding or the winding angle of gut threads member with respect to the flexible pipe axis.
Above-mentioned fitting 5 has metal insertion tube 19 and metal spigot accessory (tightening up accessory) 21, and described insertion tube 19 inserts the swaged forging part 9 of described hose main body 3, and described socket accessory is installed on the periphery of described swaged forging part 9.The metal nuts 23 that is used to connect is rotatably installed in the periphery of the axial outer end portion of described insertion tube 19 in the mode of locking.Described metal nuts 23 comprises the inner peripheral surface of inner tapping.Be clearly shown that among Fig. 3, comprise annular groove 25 on the outer circumferential face of described insertion tube 19, be used for described socket accessory 21 is fixed on insertion tube 19 reliably.Insertion tube 19 inserts in the swaged forging part 9, thereby described annular groove 25 is positioned at outside the axial end of hose main body 3, particularly described annular groove 25 is positioned at the axial end outside and close this axial end place of hose main body 3.Socket accessory 21 has sleeve 27 and one-body molded interior guide rib 29 in described sleeve 27 axial outer end portions.The sleeve 27 of described socket accessory 21 is installed on the periphery of described swaged forging part 9, thereby guide rib 29 in described is positioned at the axial end outside of hose main body 3 corresponding to the annular groove 25 of described insertion tube 19.By the described sleeve 27 of swaged forging, this sleeve 27 make described swaged forging part 9 tighten up or swaged forging on described insertion tube 19, described in guide rib 29 stretch into annular groove 25, thereby described socket accessory 21 is fixed on the insertion tube 19 inseparably.At this moment, three positions (A, B, C) in the longitudinal direction are the described sleeve 27 of swaged forging respectively, and described swaged forging part 9 is tightened up in above-mentioned three positions (A, B, C) respectively.Hose main body 3 parts between the most inboard swaged forging position C, the C of position A to the swaged forging zone of position C have formed the free space of elastically deformable.The axial length of free space during no pressure, promptly free length L1 is set at and is equal to or less than 300mm.The axial length L 2 of major component 7 is 65% to 93% with the ratio of the free length L1 of free space during no pressure.And the axial length L 1 of free space is (inside of axial length L 3 * 2+ swaged forging part 9 of the axial length L 2+ tapering part 11 of major component 7 is with respect to the length or the axial length L 4 * 2 of swaged forging part 9 on the axial length L 4 * 2 of swaged forging position C or the free space).
Described interior surface layers 13 and described outer surface layer 17 can be used alone or as a mixture butyl rubber (IIR), halogenated butyl rubber (halogenation IIR), i.e. formation such as chlorobutyl rubber (Cl-IIR) and brombutyl rubber (Br-IIR), nitrile rubber (NBR), chloroprene rubber (CR), ethylene propylene diene rubber (EPDM), the rare rubber of ethene-third (EPM), fluorine rubber (FKM), epichlorohydrin or ethylene oxide copolymer (ECO), silicone rubber, urethane rubber, acrylic rubber.Although outer surface layer described herein 17 is made by rubber, it also can be made by the collapsible tube and the thermoplastic elastomer (TPE) (TPE) of acrylic type, styrene type, olefin type, diene type, polyvinyl chloride-type, urethane type, ester type, acid amide type, fluorine type etc.The gut threads member of described back-up coat 15 or reinforcing yarn can adopt formation such as PETG (PET), polyphenyl dioctyl phthalate glycol ester (PEN), square polyamide, polyamide (PA), vinylon, artificial fiber.And, use wire members also to be fine as the gut threads member.
Described high-pressure resistant hose 1 adopts following method manufacturing.At first, mutual stacked described interior surface layers 13, back-up coat 15 and outer surface layer (coating) 17, be formed on the multilayer overlength body that has identical inside and outside footpath and wall thickness on the whole length, described overlength body is cut into predetermined length, thereby obtain flexible pipe matrix 31 (with reference to Fig. 4).Braid angle braiding splicing yarn line with 48 ° to 54 ° (not comprising 54 °) forms back-up coat 15.Uneven for back-up coat 15 is caused on the internal surface of interior surface layers 13, the wall thickness of interior surface layers 13 preferably is equal to or greater than 1.0mm.Uneven for back-up coat 15 is caused on the outer surface of outer surface layer 17, the effective thickness of outer surface layer 17 is equal to or greater than 0.9mm.
Next, by keeping mould (holding member) 33 to keep described flexible pipe matrix 31, make the axial contrast end of described flexible pipe matrix 31 outwards outstanding respectively.Described maintenance mould 33 comprises semiorbicular patrix 35 and counterdie 37.The component dimple 39,41 (with reference to Fig. 5) that has semi-circular cross-section on the matching surface of patrix 35 and counterdie 37 respectively.When patrix 35 and counterdie 37 cooperatively interacted, component dimple 39,41 formed the elongated receiver portion (cavity) 43 (especially, its length equals or be substantially equal to the length L 2 of major component 7) of circular cross-sections.The described accommodation section divides 43 diameter to be slightly less than the external diameter of flexible pipe matrix 31.That is to say that the diameter of each component dimple 39,41 or radius are slightly less than the external diameter or the outer radius of described flexible pipe matrix 31.In addition, each opposition side portion of component dimple 39 has the shallow groove 39a that withdraws from, and each opposition side portion of component dimple 41 has the shallow groove 41a that withdraws from.When described patrix 35 and counterdie 37 are combined together, described withdraw from groove 39a and withdraw from groove 41a cooperate to form and withdraw from dimple part 45, the described dimple part on each opposite side part of receiver portion 43 outwards outstanding (with reference to Fig. 7) that withdraws from.Each withdraws from groove 39a, 41a can form 1/4th circular crosssections, 1/4th oval cross sections or 1/4th elliptic cross-sections, thereby the described dimple part 45 that withdraws from can form semi-circular cross-section (for example, radius is about the semi-circular cross-section of 1mm), semioval shape cross section or half elliptic cross section.Therefore, flexible pipe matrix 31 is clipped in the middle of the component dimple 39,41 when patrix 35 and counterdie 37 are combined together, and when flexible pipe matrix 31 being remained on keep in the mould 33, described flexible pipe matrix 31 is extruded tightly in the receiver portion 43 of diameter less than described flexible pipe matrix 31 diameters, and (with reference to Fig. 6 and Fig. 7) outwards given prominence to from described maintenance mould 33 in its axial contrast end.Described flexible pipe matrix 31 remains on and keeps can not moving vertically, radially dilatancy in the mould 33.And the distortion that is squeezed in middle flexible pipe matrix 31 by described component dimple 39,41 is tightly absorbed by the described dimple part 45 that withdraws from.Thereby flash when having avoided described flexible pipe matrix 31 molded effectively.Simultaneously, described maintenance mould 33 is also for example kept by being connected on the positioning device.
The component dimple also can form semioval shape cross section or half elliptic cross section.This component dimple 47,49 can cooperate the receiver portion that forms avette or elliptic cross-section (
Cavity) 51, the minor axis that the described accommodation section is divided or the length (D1) of minor axis are less than the external diameter of flexible pipe matrix 31, and the length of its major axis or major diameter (D2) is greater than the external diameter of flexible pipe matrix 31.In this structure, flexible pipe matrix 31 is by in the middle of described component dimple 47,49 is squeezed in tightly, and the part 52 that withdraws from that the distortion of described flexible pipe matrix 31 is positioned at the opposite end of major axis or major diameter absorbs (with reference to Fig. 8).Thereby flash in the time of can avoiding described flexible pipe matrix 31 molded effectively.
After by maintenance mould 33 described flexible pipe matrix 31 being clipped in the middle and keeping, with each axial end of an axle (radial expansion bar) 53 insertions outstanding flexible pipe matrix 31 from described maintenance mould 33, to form the swaged forging part 9 of hose main body 3.Here, before inserting described axle 53, best semi-harden flexible pipe matrix 31 is so that described back-up coat 15 is difficult for invading described interior surface layers 13.As shown in Figure 9, described axle 53 has the front end guidance part 57 that external diameter equals or is substantially equal to the major diameter part 55 of the internal diameter for the treatment of swaged forging part 9 and is arranged on described major diameter part 55 integratedly.Front end guidance part 57 comprise external diameter equal or be substantially equal to described flexible pipe matrix 31 internal diameter fore-end 59 and between front end guidance part 59 and major diameter part 55 and towards the radial expansion part 61 of the taper of fore-end 59 radial contraction.The suitable divergence cone angle (outer surface is the tilt angle of direction to axial) of radial expansion part 61 of tapering part 11 of described hose main body 3 of being used to be shaped is 5 ° to 25 °.When divergence cone angle was lower than 5 °, the axial length of the tapering part 11 of hose main body 3 was long.When divergence cone angle during greater than 25 °, the property inserted of described axle 53 (that is, axle 53 is inserted the operability of flexible pipe matrixes 31) weakens.
For the ease of the level and smooth insertion of described axle 53, described axle 53 can have the pressurized hole that runs through, and this hole is in the front end perforate of fore-end 59.Described axle 53 can inserted described flexible pipe matrix 31 via pressurized hole in described flexible pipe matrix 31 supply pressure gas processes or behind the supply pressure gas.Perhaps,, can between described axle 53 and described flexible pipe matrix 31, use and insert supplementary means so that the slip of axle 53 in flexible pipe matrix 31 for the slip resistance between the internal surface that reduces described axle 53 and described flexible pipe matrix 31.As for described insertion supplementary means, can make water, refrigerator oil, silicon etc.
By insert axle 53 in described flexible pipe matrix 31, the axial end portion radial expansion of flexible pipe matrix 31 forms large diameter swaged forging part 9 and tapering part 11, as shown in figure 10.Originally, the braid angle of the reinforcing yarn of back-up coat 15 is 48 ° to 54 ° (not comprising 54 °) on swaged forging part 9 and the tapering part 11.But, because radial expansion, the scope of the braid angle of the reinforcing yarn of back-up coat 15 becomes greater than 57 ° and is less than or equal to 68 ° on the swaged forging part 9, and the scope that tapering part 11 (particularly, being the axial middle part of tapering part 11) is gone up braid angle becomes greater than about 55 ° and be less than or equal to 61 °.At this moment, the braid angle scope of the reinforcing yarn of back-up coat 15 can be set at 60 ° to 68 ° on the swaged forging part 9.And the scope of the braid angle of the reinforcing yarn of back-up coat 15 (braid angle at the axial middle part of tapering part 11) can be set at greater than about 55 ° and be less than or equal to 60 ° on described tapering part 11.
When described axle 53 was inserted in the described flexible pipe matrix 31, described flexible pipe matrix 31 was subjected to hermo-hardening and remains in the described maintenance mould 33.Then, remove described maintenance mould 33 and described axle 53, can obtain hose main body 3, as shown in figure 11.Fitting joint accessory 5 on the swaged forging part 9 of the hose main body of making like this 3 promptly obtains high-pressure resistant hose shown in Figure 11.Tensile strain rate (growth rate) during high-pressure resistant hose 1 pressurized is set in-5% to 10% the scope.
Below, embodiments of the invention are described.
As shown in table 1, for high-pressure resistant hose 1, provided high-pressure resistant hose embodiment No.1-No.6 and high-pressure resistant hose comparative example No.1-No.4 respectively, and measurements and calculations tensile strain rate (%), cracking pressure (MPa) normal temperature (RT) under and durability high temperature circulation pressure under of every kind of example when pressurized.High-pressure resistant hose embodiment No.1-No.5 and high-pressure resistant hose comparative example No.1-No.4 have used the fitting 5 of same structure respectively.Used the identical but fitting of slightly larger in diameter of structure among the high-pressure resistant hose embodiment No.6.
Tensile strain rate during pressurization is that the internal diameter in major component is the measured value of pressure in the time of 1 minute that the high-pressure resistant hose of 9.0mm is subjected to 3.5MPa, is the measured value of pressure in the time of 1 minute that the high-pressure resistant hose of 12.0mm is subjected to 1.1MPa at the major component internal diameter.Pressure when described high-pressure resistant hose broke when the cracking pressure under the normal temperature referred under the normal temperature state to increase the hydraulic pressure that acts on the described high-pressure resistant hose with 160MPa/ minute.Durability under the high temperature circulation pressure refers to crooked 90 ° of described high-pressure resistant hose, the durability when forming the L-type at its axial middle part, the axial contrast end of described high-pressure resistant hose is fixed reliably, one of them axial end portion is closed, and is subjected to the ringing of oil pressure at another axial end portion.This pressing speed of sentencing 35cpm acts on 100 ℃, the oil pressure of 3.5MPa repeatedly.
In that hurdle of " yarn number " of the back-up coat of each embodiment and comparative example, " 2 parallel yarn * 24 yarn guiders " refer to two parallel reinforcing yarns of braiding on 24 yarn guider machines in table 1.
In that hurdle of " length " of " tapering part " in table 1 (axial length is referring to L3), the opposite end of numeral " 20 ", " 12 " and " 10 " expression embodiment and comparative example has the tapering part that length is 10mm, 6mm and 5mm respectively." length " Na Yilan of " swaged forging part " also is so, and the opposite end of expression embodiment and comparative example has the swaged forging part that length is 6mm, 5mm and 4mm respectively.Wherein, " length " of " swaged forging part " refers to the length (referring to L4) of swaged forging part in the hose main body free space.
For " cracking pressure under the normal temperature ", the major component internal diameter is that the desired value of the high-pressure resistant hose of 9mm is 20MPa or more than the 20MPa, and the major component internal diameter is that the desired value of the high-pressure resistant hose of 12mm is 10MPa or more than the 10MPa.
Table 1
| Embodiment | |||||
| 1 | 2 | 3 | |||
| Size during no pressure | |||||
| Major component | Size | Internal diameter (mm) | 9.0 | 9.0 | 9.0 |
| External diameter (mm) | 16.0 | 16.0 | 16.0 | ||
| Length (mm) | 60 | 100 | 100 | ||
| Interior surface layers | Material | Cl-IIR | Cl-IIR | Cl-IIR | |
| Wall thickness (mm) | 2.0 | 2.0 | 2.0 | ||
| Back-up coat | Material | PET | PET | PET | |
| The Denier number | 3000 pellets | 3000 pellets | 3000 pellets | ||
| Yarn number | 2 parallel yarn * 24 yarn guiders | 2 parallel yarn * 24 yarn guiders | 2 parallel yarn * 24 yarn guiders | ||
| Braid angle (°) | 49 | 49 | 52 | ||
| Outer surface layer | Material | EPDM | EPDM | EPDM | |
| Wall thickness (mm) | 1.0 | 1.0 | 1.0 | ||
| Tapering part | The size back-up coat | Length (mm) | 20 | 20 | 20 |
| Braid angle (°) | 58 | 58 | 60 | ||
| The swaged forging part | The size back-up coat | Internal diameter (mm) | 12.0 | 12.0 | 12.0 |
| External diameter (mm) | 17.5 | 17.5 | 17.5 | ||
| Length (mm) | 12 | 12 | 12 | ||
| Braid angle (°) | 66 | 66 | 67 | ||
| The length of hose main body (free length) (mm) during pressurized | 100 | 130 | 136 | ||
| The initial length of hose main body (free length) (mm) | 92 is good | 132 is good | 132 is good | ||
| The initial length of the length/hose main body of major component (%) | 65 | 76 | 76 | ||
| Tensile strain rate during pressurized (%) | 8.7 it is good | -1.5 is good | 3.0 it is good | ||
| Cracking pressure under the normal temperature (MPa) | 23.2 it is good | 23.1 it is good | 25.0 it is good | ||
| Durability under the high temperature circulation pressure | 100,000 circulations are not interrupted | 100,000 circulations are not interrupted | 100,000 circulations are not interrupted | ||
Table 1 (continuing)
| Example | |||||
| 4 | 5 | 6 | |||
| Size during no pressure | |||||
| Major component | Size | Internal diameter (mm) | 9.0 | 9.0 | 12.0 |
| External diameter (mm) | 16.0 | 16.0 | 18.0 | ||
| Length (mm) | 250 | 278 | 200 | ||
| Interior surface layers | Material | Cl-IIR | Cl-IIR | Cl-IIR | |
| Wall thickness (mm) | 2.0 | 2.0 | 1.6 | ||
| Back-up coat | Material | PET | PET | PET | |
| The Denier number | 3000 pellets | 3000 pellets | 3000 pellets | ||
| Yarn number | 2 parallel yarn * 24 yarn guiders | 2 parallel yarn * 24 yarn guiders | 2 parallel yarn * 24 yarn guiders | ||
| Braid angle (°) | 49 | 49 | 52 | ||
| Outer surface layer | Material | EPDM | EPDM | EPDM | |
| Wall thickness (mm) | 1.0 | 1.0 | 1.0 | ||
| Tapering part | The size back-up coat | Length (mm) | 20 | 12 | 20 |
| Braid angle (°) | 58 | 58 | 57 | ||
| The swaged forging part | The size back-up coat | Internal diameter (mm) | 12.0 | 12.0 | 15.0 |
| External diameter (mm) | 17.5 | 17.5 | 20.5 | ||
| Length (mm) | 12 | 10 | 12 | ||
| Braid angle (°) | 68 | 68 | 61 | ||
| The length of hose main body (free length) (mm) during pressurized | 272 | 285 | 228 | ||
| The initial length of hose main body (free length) (mm) | 282 is good | 300 is good | 232 is good | ||
| The initial length of the length/hose main body of major component (%) | 89 | 93 | 86 | ||
| Tensile strain rate during pressurized (%) | -3.5 is good | -5.0 is good | -1.7 is good | ||
| Cracking pressure under the normal temperature (MPa) | 22.8 it is good | 22.7 it is good | 14.0 it is good | ||
| Durability under the high temperature circulation pressure | 100,000 circulations are not interrupted | 100,000 circulations are not interrupted | 100,000 circulations are not interrupted | ||
Table 1 (continuing)
| Comparative example | ||||||
| 1 | 2 | 3 | 4 | |||
| Size during no pressure | ||||||
| Major component | Size | Internal diameter (mm) | 9.0 | 9.0 | 9.0 | 9.0 |
| External diameter (mm) | 16.0 | 16.0 | 16.0 | 16.0 | ||
| Length (mm) | 100 | 100 | 50 | 282 | ||
| Interior surface layers | Material | Cl-IIR | Cl-IIR | Cl-IIR | Cl-IIR | |
| Wall thickness (mm) | 2.0 | 2.0 | 2.0 | 2.0 | ||
| Back-up coat | Material | PET | PET | PET | PET | |
| The Denier number | 3000 pellets | 3000 pellets | 3000 pellets | 3000 pellets | ||
| Yarn number | 2 parallel yarn * 24 yarn guiders | 2 parallel yarn * 24 yarn guiders | 2 parallel yarn * 24 yarn guiders | 2 parallel yarn * 24 yarn guiders | ||
| Braid angle (°) | 47 | 54 | 49 | 49 | ||
| Outer surface layer | Material | EPDM | EPDM | EPDM | EPDM | |
| Wall thickness (mm) | 1.0 | 1.0 | 1.0 | 1.0 | ||
| Tapering part | The size back-up coat | Length (mm) | 20 | - | 20 | 10 |
| Braid angle (°) | 58 | - | 58 | 60 | ||
| The swaged forging part | The size back-up coat | Internal diameter (mm) | 12.0 | 12.0 | 12.0 | 12.0 |
| External diameter (mm) | 17.5 | Can not radial expansion | 17.5 | 17.5 | ||
| Length (mm) | 12 | 12 | 8 | |||
| Braid angle (°) | 66 | Below 69 or 69 | 68 | 67 | ||
| The length of hose main body (free length) (mm) during pressurized | 124 | 91 | 284 | |||
| The initial length of hose main body (free length) (mm) | 132 is good | 82 is good | 300 is good | |||
| The initial length of the length/hose main body of major component (%) | 76 | 61 | 94 | |||
| Tensile strain rate during pressurized (%) | -6.1 is of inferior quality | 10.4 it is of inferior quality | -5.3 is of inferior quality | |||
| Cracking pressure under the normal temperature (MPa) | 21.0 it is good | 23.5 it is good | 23.0 it is good | |||
| Durability under the high temperature circulation pressure | 100,000 circulations are not interrupted | 100,000 circulations are not interrupted | 100,000 circulations are not interrupted | |||
As can be seen from Table 1, in comparative example 1, comprise braid angle on the major component and be 47 ° back-up coat, major component is significantly shunk vertically during pressurized, and total free length or the tensile strain rate of free length are during pressurized
-6.1%, exhausted bigger negative value of durationIn comparative example 3, the length (axial length L 2) of major component is little of 61% with the ratio of total free length or free length (the initial length L1 of hose main body) during no pressure, the tensile strain rate of total free length when the outer other parts of major component greatly influence pressurized, so the tensile strain rate during pressurized is greatly to 10.4%.In comparative example 2, comprise braid angle on the major component and be 54 ° back-up coat, flexing appears in the flexible pipe matrix in the partially-formed process of swaged forging, thereby axle can not be inserted the flexible pipe matrix fully.In comparative example 4, the ratio of the length of major component and total free length or free length (initial length of hose main body) is greatly to about 94% during no pressure, the tensile strain rate of total free length when major component also greatly influences pressurized, therefore the tensile strain rate during pressurized is-5.3%, bigger negative value of absolute value.
On the contrary, at each embodiment No.1 in No.6, the braid angle of back-up coat is respectively 49 ° to 52 °, 61 ° to 68 °, 57 ° to 60 ° on major component 7, swaged forging part 9, the tapering part 11, the length L 2 of major component 7 is suitable with the ratio of total free length or free length (initial length of hose main body) L1 during no pressure, be 65% to 93%, the tensile strain rate of total free length is also suitable during pressurized, is-5.0% to 8.7%.And embodiment No.1 does not interrupt yet to No.6 even after at high temperature moving 100,000 circulations.The internal diameter of major component 7 be the minimum burst pressure of high-pressure resistant hose of 9.0mm up to 22.8MPa, the internal diameter of major component 7 is that the high-pressure resistant hose of 12mm also has enough big cracking pressure 14.0MPa.
High-pressure resistant hose of the present invention for example can be installed in the narrow pipe-line system space such as engine compartment, and can be used for carrying high-pressure liquid.
And, according to the method for the described high-pressure resistant hose of manufacturing of the present invention, can make described high-pressure resistant hose easily, for example, be installed to the flexible pipe that comes and can be used for carrying high-pressure liquid in the narrow pipe-line system space such as engine compartment for example.
Claims (8)
1. high-pressure resistant hose, its cracking pressure is equal to or greater than 5MPa, comprising:
The hose main body of multi-layer structure (3), this hose main body comprises interior surface layers (13), be included in the back-up coat (15) of the gut threads member that the braiding of described interior surface layers (13) outside or helically reel and be positioned at outer surface layer (17) outside the described back-up coat (15) as coating, tighten up partly (9) that described hose main body (3) has major component (7) and is positioned at described hose main body (3) axial end portion place, the described diameter that tightens up the diameter of part greater than described major component (7);
Fitting (5), it is installed on described tightening up on the part (9) regularly, described fitting (5) has insertion tube (19) and tightens up accessory (21), described insertion tube inserts tighten up partly (9) of diameter greater than described major component (7) diameter, described tighten up accessory be installed on described tighten up the part (9) periphery on, be used for this tighten up the part (9) be tightened to described insertion tube (19);
Wherein, described hose main body (3) also has and is positioned at the tapering part (11) that tightens up between part (9) and the major component (7);
Wherein, major component (7) goes up the angle of the braiding of back-up coat (15) or the gut threads member that helically is reeled more than or equal to 48 ° and less than 54 °, tighten up the angle of part on (9) greater than 57 ° and be less than or equal to 68 °, the angle on the tapering part (11) is greater than about 55 ° and be less than or equal to 61 °;
Wherein, tapering part (11) angle that goes up the gut threads member that braiding or helically reel goes up the angle of braiding or helically coiling gut threads member less than tightening up part (9); And
The length (L2) of major component (7) is 65% to 93% with the ratio of the free length (L1) of hose main body (3) during no pressure.
2. high-pressure resistant hose as claimed in claim 1 is characterized in that:
Describedly tighten up that part (9) goes up the braiding of back-up coat (15) or the angle of helically coiling gut threads member is 60 ° to 68 °.
3. high-pressure resistant hose as claimed in claim 1 or 2 is characterized in that:
The angle that described tapering part (11) is gone up the braiding of back-up coat (15) or helically coiling gut threads member is for greater than about 55 ° and be less than or equal to 60 °.
4. method of making high-pressure resistant hose, described flexible pipe comprises the hose main body (3) and the fitting (5) of multi-layer structure, described hose main body comprises interior surface layers (13), be included in the back-up coat (15) of the gut threads member of braiding of described interior surface layers (13) outside or helically coiling, and be positioned at outer surface layer (17) outside the described back-up coat (15) as coating, tighten up partly (9) that described hose main body (3) has major component (7) and is positioned at described hose main body (3) axial end portion place, the described diameter that tightens up the diameter of part greater than described major component (7); Described fitting (5) is installed on described tightening up on the part (9) regularly, described fitting (5) has insertion tube (19) and tightens up accessory (21), described insertion tube inserts tighten up partly (9) of diameter greater than described major component (7) diameter, described tighten up accessory be installed on described tighten up the part (9) periphery on, be used for this tighten up the part (9) be tightened to described insertion tube (19); The method of making described high-pressure resistant hose (1) comprises the steps:
Preparation comprises the step of flexible pipe matrix (31) of the multi-layer structure of interior surface layers (13), back-up coat (15) and outer surface layer (17), and described flexible pipe matrix (31) has identical internal diameter, external diameter and wall thickness on its whole length;
By the step that keeps mould (33) to keep described flexible pipe matrix (31), its axial end portion is outwards given prominence to from described maintenance mould (33);
Pressurization makes axle (53) insert the axial end portion of the flexible pipe matrix (31) that is kept by described maintenance mould (33), also radially enlarge described axial end portion to form the step of tightening up part (9);
Hardenability band have formed tighten up the part (9) described flexible pipe matrix (31), to obtain the step of described hose main body (3);
Tighten up the step of part on (9) with what described fitting (5) was fixed to described hose main body (3) reliably;
Wherein, described maintenance mould (33) comprises some component dimples (39 that have respectively, 41,47,49) maintenance mould section (35,37), described maintenance mould section (35,37) be designed to cooperate formation to have receiver portion (43,51) maintenance mould (33), the described accommodation section branch holds and keeps described flexible pipe matrix (31), described accommodation section branch (43,51) by the component dimple (39 of combination, 41,47,49) define and compressibility ground holds described flexible pipe matrix (31), and described accommodation section branch (43,51) comprise the deformation part that can make flexible pipe matrix (31) and withdraw from part (45 from what this squeezed out, 52).
5. the method for manufacturing high-pressure resistant hose as claimed in claim 4 is characterized in that:
Described maintenance mould (33) comprises a pair of maintenance mould section (35,37), and they have component dimple (39,41,47,49) respectively.
6. the method for manufacturing high-pressure resistant hose as claimed in claim 5 is characterized in that:
Described component dimple (39,41) forms semi-circular cross-section respectively, thereby form and to have circular cross-section and diameter receiver portion (43) less than the external diameter of described flexible pipe matrix (31), and each component dimple (39,41) has shallow component groove (39a, 41a) in the opposition side portion, is used for forming on the opposite side of each described accommodation section branch (43) withdrawing from part (45).
7. the method for manufacturing high-pressure resistant hose as claimed in claim 5 is characterized in that:
Described component dimple (47,49) forms semioval shape or half elliptic cross section respectively, thereby make described accommodation section branch (51) form avette or elliptic cross-section, its minor axis is less than the external diameter along the flexible pipe matrix (31) on the cooperation contact direction of described maintenance mould section (35,37), the major axis vertical with minor axis is longer than the external diameter of described flexible pipe matrix (31), and described accommodation section branch (51) has the portion that withdraws from (52) around major axis opposite end position.
8. as the method for each described manufacturing high-pressure resistant hose in the claim 4 to 7, it is characterized in that:
Before described axle (53) is inserted the axial end portion of described flexible pipe matrix (31) and/or in the insertion process, between the axial end portion of described flexible pipe matrix (31) and described axle (53), use and insert supplementary means.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006079822 | 2006-03-22 | ||
| JP2006079822A JP2007255541A (en) | 2006-03-22 | 2006-03-22 | High pressure resistant hose |
| JP2006079823 | 2006-03-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101042204A true CN101042204A (en) | 2007-09-26 |
| CN100473885C CN100473885C (en) | 2009-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100928985A Expired - Fee Related CN100473885C (en) | 2006-03-22 | 2006-03-28 | High-pressure resistant hose |
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|---|---|
| JP (1) | JP2007255541A (en) |
| CN (1) | CN100473885C (en) |
Cited By (3)
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| CN102782384A (en) * | 2009-11-20 | 2012-11-14 | 普库有限公司 | Interference securing mechanism |
| WO2016045230A3 (en) * | 2014-09-24 | 2016-06-30 | 浙江海伦塑胶有限公司 | Automatically extending and expanding water pipe of extended service life |
| CN114414176A (en) * | 2022-03-30 | 2022-04-29 | 风凯换热器制造(常州)有限公司 | Processing method and leakage detection method for double-layer conveying pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090169790A1 (en) * | 2007-12-28 | 2009-07-02 | Saint-Gobain Performance Plastics Corporation | Reinforced tube |
| JP2010144759A (en) * | 2008-12-16 | 2010-07-01 | Tokai Rubber Ind Ltd | Hose joining method |
| JP6553482B2 (en) * | 2015-10-28 | 2019-07-31 | Ｊｘｔｇエネルギー株式会社 | Gas filling device |
| IT201700071472A1 (en) * | 2017-06-27 | 2018-12-27 | Fitt Spa | ULTRALIGHT REINFORCED HOSE |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3244183B2 (en) * | 1991-10-14 | 2002-01-07 | 豊田合成株式会社 | Hose with connection |
| JP4154370B2 (en) * | 2004-07-08 | 2008-09-24 | 東海ゴム工業株式会社 | Method for manufacturing pressure-resistant vibration absorbing hose |
-
2006
- 2006-03-22 JP JP2006079822A patent/JP2007255541A/en not_active Withdrawn
- 2006-03-28 CN CNB2006100928985A patent/CN100473885C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102782384A (en) * | 2009-11-20 | 2012-11-14 | 普库有限公司 | Interference securing mechanism |
| WO2016045230A3 (en) * | 2014-09-24 | 2016-06-30 | 浙江海伦塑胶有限公司 | Automatically extending and expanding water pipe of extended service life |
| CN114414176A (en) * | 2022-03-30 | 2022-04-29 | 风凯换热器制造(常州)有限公司 | Processing method and leakage detection method for double-layer conveying pipeline |
| CN114414176B (en) * | 2022-03-30 | 2022-06-03 | 风凯换热器制造(常州)有限公司 | Processing method and leakage detection method for double-layer conveying pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007255541A (en) | 2007-10-04 |
| CN100473885C (en) | 2009-04-01 |
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