CN108223943A - Plastic flexible pipe withholds connection method and plastic flexible pipe component - Google Patents
Plastic flexible pipe withholds connection method and plastic flexible pipe component Download PDFInfo
- Publication number
- CN108223943A CN108223943A CN201710750587.1A CN201710750587A CN108223943A CN 108223943 A CN108223943 A CN 108223943A CN 201710750587 A CN201710750587 A CN 201710750587A CN 108223943 A CN108223943 A CN 108223943A
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- China
- Prior art keywords
- flexible pipe
- plastic flexible
- connection method
- withheld
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/02—Hose-clips
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention relates to the connection of plastic flexible pipe and pipe fitting, more particularly to plastic flexible pipe withholds connection method and using plastic flexible pipe component made of this method.Plastic flexible pipe withholds connection method, including plastic flexible pipe set is set on pipe fitting step, housing is withheld to step on the coupling part of plastic flexible pipe and pipe fitting, withholding for the housing is withheld including tentatively withholding with secondary, preliminary withhold is completed within the temperature range of 30 DEG C of above and below the glass transition temperature of the plastic polymer of main pipe for forming, and the secondary temperature of withholding withheld is less than the temperature tentatively withheld.The present invention uses above-mentioned technical proposal, preliminary withhold is completed within the temperature range of 30 DEG C of above and below the glass transition temperature of the plastic polymer of main pipe for forming, utilize the glass transition of plastic polymer, deformation when main pipe withholds and internal stress can be reduced, so as to ensure leakproofness, and secondary withhold the reliability that can ensure to withhold connection.
Description
Technical field
The present invention relates to the connection of plastic flexible pipe and pipe fitting, more particularly to plastic flexible pipe withholds connection method and use
Plastic flexible pipe component made of this method.
Background technology
Plastic flexible pipe is widely used in hydro-pneumatic field, compound high pressure（Refer generally to operating pressure more than 35MPa）It is poly-
Tetrafluoroethene hose is a kind of novel product, including teflon hose and is connected to teflon hose end
Pipe fitting and housing, teflon hose layers such as main pipe and enhancement layer generally made of polytetrafluoroethylene (PTFE) it is compound and
Into enhancement layer is generally formed using braided steel wire.The hose overcomes the shortcomings that rubber hose and metal hose, to army of China
Important meaning is suffered from, civilian industry, is mainly used in the hydro-pneumatic field of military and civilian good.
However, high pressure teflon hose height relies on import at present, it, particularly will to movement response in military industry field
The fighter plane being getting faster and novel type product are asked, higher and higher, state is required to the technology of super-pressure teflon hose
The enterprise that interior market can produce this extreme pressure hose cans be counted on one's fingers.Therefore, each model of army and seating plane use at present
Super-pressure flexible conduit system be widely used that the heavy high pressure polytetrafluoroethylhose hose assembly of rubber hose or import.Rubber
The shortcomings that glue hose is structure bulky, and flow resistance and bending radius are big, fatigue life is short, easy to aging, and poor corrosion resistance is also easy to produce more
Excess, low-temperature working performance and weatherability difference etc. affect safety and the practicability of system；Heavy high pressure soft PTFE
Pipe is generally woven using stainless steel wire, and structure is more heavy, and bending radius is big, limits in the compact environment of some space structures
It uses.
Authorization Notice No. is that the Chinese patent of 203067985 U of CN discloses a kind of hose, including main pipe and main pipe
Periphery on the enhancement layer that is arranged, the enhancement layer is the fiber braiding layer for the cannula-like worked out by aramid fiber, fiber
Braiding layer periphery is arranged with the supporting layer of cannula-like surrounded by wire establishment, is provided between the supporting layer and enhancement layer
The foam filled layer being made of expanded material, foam filled layer distinguish hot melt adhesion in the inner wall of supporting layer and the outer wall of enhancement layer
On.In use, since aramid fiber has good bending property, high temperature resistance and wear-resisting property, and density ratio wire
Density it is much smaller so that enhancement layer is before guarantee or even raising under the premise of strength and stiffness performance, reduction as possible
Weight, and supporting layer plays fiber braiding layer and main pipe support protective effect, main pipe and fiber when avoiding bending
There is the problem of the problem of " folding is dead " and hose construction heaviness and big bending radius in braiding layer.
However, the general manufacture craft such as Authorization Notice No. of polytetrafluoroethylhose hose assembly is in 204300544 U of CN
The technique that a kind of hydraulic air rubber hose assembly disclosed in state's patent uses, after teflon hose completes, poly- four
Housing is put on vinyl fluoride hose, then teflon hose set is set on pipe fitting, is finally completed on buckle machine poly-
Tetrafluoroethene hose and connector withhold connection, obtain polytetrafluoroethylhose hose assembly.But polytetrafluoroethylene (PTFE) during withholding
Hose will necessarily deform and generate internal stress, and internal stress can cause between teflon hose and pipe fitting during use
Sealing performance declines so that pipe fitting coupling part becomes weak link.In addition, during withholding, teflon hose
Crizzle may be generated withholding position, there are leakage hidden danger.
Invention content
Connection method is withheld the object of the present invention is to provide a kind of plastic flexible pipe, to solve plastic flexible pipe in the prior art
With the junction sealing performance of pipe fitting it is weaker the problem of.Meanwhile use modeling made of this method the present invention also provides a kind of
Expect hose.
To achieve the above object, the present invention in plastic flexible pipe withhold connection method the technical solution adopted is that：
1. plastic flexible pipe of scheme withholds connection method, including plastic flexible pipe set is set on pipe fitting step, by outer hitch
The step being pressed onto on the coupling part of plastic flexible pipe and pipe fitting, withholding for the housing are withheld including tentatively withholding with secondary,
Preliminary withhold is complete within the temperature range of 30 DEG C of above and below the glass transition temperature of the plastic polymer of main pipe for forming
Into the secondary temperature of withholding withheld is less than the temperature tentatively withheld, and can ensure to withhold the reliability of connection, with existing skill
Art is compared, and can avoid the problem that the junction sealing performance of plastic flexible pipe and pipe fitting is weaker.
Advantageous effect：For the present invention using above-mentioned technical proposal, it is for forming the plastic polymer of main pipe tentatively to withhold
It is completed within the temperature range of 30 DEG C above and below the glass transition temperature of object, using the glass transition of plastic polymer, master can be reduced
Deformation and internal stress when tube body is withheld so as to ensure leakproofness, and secondary withhold the reliability that can ensure to withhold connection.
Plastic flexible pipe of the scheme 2. according to scheme 1 withholds connection method, and the temperature tentatively withheld is 140
DEG C to 150 DEG C.
Plastic flexible pipe of the scheme 3. according to scheme 1 withholds connection method, and withholding for the housing is complete in two times
Into secondary withhold at least has 80 DEG C of temperature difference with tentatively withholding
Plastic flexible pipe of the scheme 4. according to scheme 1 withholds connection method, and the secondary temperature withheld is 25 DEG C ± 10
℃。
Plastic flexible pipe of the scheme 5. according to scheme 1 or 2 or 3 or 4 withholds connection method, and this method is additionally included in
Before withholding between plastic flexible pipe and pipe fitting the step of painting autovulcanization silicon rubber.
Plastic flexible pipe of the scheme 6. according to scheme 5 withholds connection method, and the autovulcanization silicon rubber is GD414
Room temperature cureself silicon rubber.
Plastic flexible pipe of the scheme 7. according to scheme 1 or 2 or 3 or 4 withholds connection method, and the plastic flexible pipe is
Ptfe composite hose, including main pipe made of polytetrafluoroethylene (PTFE) and the aramid fiber being successively set on the outside of main pipe braiding
Layer, steel wire braid and layer of polyurethane.
Plastic flexible pipe of the scheme 8. according to scheme 1 or 2 or 3 or 4 withholds connection method, the inner wall of the housing
Face is equipped with inner groove, and the inner groove has the inclined-plane for meeting the direction of insertion to plastic flexible pipe.
Plastic flexible pipe of the scheme 9. according to scheme 8 withholds connection method, and the section of the inner groove is right angle ladder
Shape, the short transverse of right-angled trapezium and the axial direction of housing are consistent, and the inclined-plane is by the oblique with the right-angled trapezium of inner groove
The corresponding cell wall of waist is formed.
Plastic flexible pipe of the scheme 10. according to scheme 1 or 2 or 3 or 4 withholds connection method, and the pipe fitting is used for
The peripheral surface for the part being connect with plastic flexible pipe is equipped with rectangular seal slot.
Plastic flexible pipe of the scheme 11. according to scheme 1 or 2 or 3 or 4 withholds connection method, and the pipe fitting is for modeling
One end that material hose is inserted into is equipped with the end face of the lead-in chamfered for plastic flexible pipe to be guided to be arranged, the lead-in chamfered and pipe fitting
Between be equipped with rounded corner.
Plastic flexible pipe component in the present invention the technical solution adopted is that：Plastic flexible pipe component including plastic flexible pipe, is plugged in
Pipe fitting, the housing withheld on the coupling part of plastic flexible pipe and pipe fitting in the port of plastic flexible pipe, the pipe fitting
Scheme is attached used by withholding connection method by above-mentioned any one with housing.
Description of the drawings
Fig. 1 is the structure diagram of the embodiment one of plastic flexible pipe component in the present invention；
Fig. 2 is the structure diagram of pipe fitting in Fig. 1；
Fig. 3 is partial enlarged view at the A of Fig. 2；
Fig. 4 is the structure diagram of housing in Fig. 1；
Fig. 5 is partial enlarged view at the B of Fig. 4；
Fig. 6 is the structure diagram of the embodiment two of plastic flexible pipe component in the present invention.
Each reference numeral is corresponding entitled in figure：1- ptfe composite hoses, 2- pipe fittings, 3- housings, outside 4-
Cover nut, 5- rectangular seal slots, 6- lead-in chamfereds, 7- rounded corners, 8- inner grooves, 9- inclined-planes.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
The embodiment of plastic flexible pipe component is just like shown in Fig. 1 ~ Fig. 5, being a kind of ptfe composite hose in the present invention
Component including ptfe composite hose 1, the pipe fitting being plugged in the port of ptfe composite hose 12, is withheld
Housing 3 on the coupling part of ptfe composite hose 1 and pipe fitting 2 and the cap nut being connected on pipe fitting 2
4.Wherein ptfe composite hose 1 includes the main pipe made of polytetrafluoroethylene (PTFE) and sets the enhancement layer outside main pipe,
Enhancement layer is followed successively by aramid fiber braiding layer, steel wire braid and layer of polyurethane from inside to outside.
The pipe fitting 2 is used for the peripheral surface of part being connect with ptfe composite hose 1 and is equipped with rectangular seal
Slot 5, rectangular seal slot 5 form sealing lip, and compared to the quantity of the sealing lip on conventional pipe fitting 2, close in the application
Lip quantity increased envelope, groove depth is reduced, so as to reduce internal stress when ptfe composite hose 1 is withheld,
To improve sealing effect.It is equally beneficial for reducing internal stress using rectangular seal slot 5.Pipe fitting 2 described in rectangular seal slot 5 is for multiple
One end of the insertion of teflon hose 1 is closed equipped with the lead-in chamfered 6 for ptfe composite hose 1 to be guided to be arranged, institute
State and rounded corner 7 be equipped between the end face of lead-in chamfered 6 and pipe fitting 2, when can avoid the ptfe composite hose 1 from putting on and
It is damaged during bending, ensures sealing performance.
The internal face of the housing 3 is equipped with inner groove 8, and the section of the inner groove 8 is right-angled trapezium, right-angled trapezium
Short transverse is axial consistent with housing 3, and cell wall corresponding with the oblique waist of the right-angled trapezium formation of inner groove 8 is met to compound
The inclined-plane 9 of the direction of insertion of teflon hose 1 can ensure connection reliability and improve leakproofness.
Include 1 set of ptfe composite hose being set to pipe when ptfe composite hose 1 is withheld with pipe fitting 2 and connect
Housing 3 is withheld ptfe composite hose 1 and the step on the coupling part of pipe fitting 2, housing 3 by step on first 2
Withhold and withheld including tentatively withholding with secondary, preliminary withhold is for forming the glass of the plastic polymer of main pipe
Change and completed within the temperature range of 30 DEG C above and below temperature, the temperature tentatively withheld described in the present embodiment is 140 DEG C to 150 DEG C, institute
It states the secondary temperature of withholding withheld and is less than the temperature tentatively withheld, 25 DEG C of room temperatures are used in the present embodiment.
Glass transition refer to amorphous domain in amorphous or hemicrystalline polymer material in temperature-fall period from
Rubbery state or elastomeric state are changed into a kind of reversible change of glassy state.In rubbery state/elastomeric state, molecule can relatively move
（That is molecular rearrangement)；In glassy state, molecular rearrangement is frozen.From molecular structure, glass transition temperature be high polymer without
A kind of relaxation of the amorphous proportion from frozen state to thawed state, has the heat of transformation, so it is like that rather than phase transition
A kind of second-order phase transistion（Claim main transformation in macromolecule dynamic mechanical）.In glass transition temperature hereinafter, high polymer is in glassy state,
Strand and segment cannot all move, and the atom (or group) for simply forming molecule is vibrated in its equilbrium position；And in glass
Though strand is immovable when changing transition temperature, segment setting in motion shows high-elastic property, if temperature increases again,
Further reach flow temperature, just make entire molecular chain movement and show viscosity flow property.Upper, vitrifying turn is used in polymer
Temperature is generally the use temperature upper limit of plastics, the lower limit of rubber temperature in use.By 30 DEG C above and below glass transition temperature
Tentatively is withheld in temperature range, can Reducing distortion and internal stress, it is secondary to withhold the reliability that ensure to withhold connection.
In addition, it is applied at sealing lip in the present embodiment before withholding between ptfe composite hose 1 and pipe fitting 2
There is GD414 room temperature cureself silicon rubber, filler can be formed after vulcanization, reduce because crizzle generates the possibility of leakage
Property, it is further ensured that sealing performance, and compared with Expansion sealing circle is set, more conducively ptfe composite hose 1 is arranged
Onto pipe fitting 2, the internal stress and micro-crack being set to during pipe fitting 2 are advantageously reduced.In other embodiments, also may be used
With using the autovulcanization silicon rubber of other forms.
In the present invention ptfe composite hose embodiment two as shown in fig. 6, it is different from embodiment one it
It is the isosceles trapezoid slot that section is isosceles trapezoid to be in, the inner groove 8 in the present embodiment on housing 3, the height of isosceles trapezoid slot
Spend axis of the direction perpendicular to housing 3.
In other embodiments of the invention, the temperature tentatively withheld can also be adjusted, preferably at 140 DEG C extremely
In the range of 150 DEG C.The secondary temperature withheld can be adjusted according to practical service environment, soft for what is used under general environment
Pipe, can select 25 DEG C ± 10 DEG C.
In addition, in other embodiments, plastic flexible pipe can also be pure plastic flexible pipe, only be formed by main pipe, not include
Enhancement layer, the material of the main pipe of plastic flexible pipe may be other materials.For compound by layers such as main pipe and enhancement layers
Into composite plastic hose, enhancement layer may be other stratified forms.In other embodiments, secondary withhold can also be divided into
More than twice, the secondary temperature withheld reduces successively every time.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To carry out the modification for being not required to make the creative labor or to which part skill to the technical solution recorded in foregoing embodiments
Art feature carries out equivalent replacement.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on,
It should all be included in the protection scope of the present invention.
Claims (10)
1. plastic flexible pipe withholds connection method, including plastic flexible pipe set is set on pipe fitting step, housing withheld
Step on the coupling part of plastic flexible pipe and pipe fitting, it is characterised in that：The housing is withheld including tentatively withholding and two
Secondary to withhold, preliminary withhold is for forming the temperature model of 30 DEG C of above and below the glass transition temperature of the plastic polymer of main pipe
Interior completion is enclosed, the secondary temperature of withholding withheld is less than the temperature tentatively withheld.
2. plastic flexible pipe according to claim 1 withholds connection method, it is characterised in that：The supervisor of the plastic flexible pipe
Body is made of polytetrafluoroethylene material, and the temperature tentatively withheld is 140 DEG C to 150 DEG C.
3. plastic flexible pipe according to claim 1 withholds connection method, it is characterised in that：Withholding for the housing is divided to two
Secondary completion, secondary withhold at least have 80 DEG C of the temperature difference with tentatively withholding.
4. plastic flexible pipe according to claim 1 withholds connection method, it is characterised in that：The secondary temperature withheld
It is 25 DEG C ± 10 DEG C.
5. plastic flexible pipe according to claims 1 or 2 or 3 or 4 withholds connection method, it is characterised in that：This method is also
It is included in before withholding the step of autovulcanization silicon rubber is applied between plastic flexible pipe and pipe fitting.
6. plastic flexible pipe according to claim 5 withholds connection method, it is characterised in that：The autovulcanization silicon rubber is
GD414 room temperature cureself silicon rubber.
7. plastic flexible pipe according to claims 1 or 2 or 3 or 4 withholds connection method, it is characterised in that：The plastics
Hose is ptfe composite hose, including main pipe made of polytetrafluoroethylene (PTFE) and the virtue being successively set on the outside of main pipe
Synthetic fibre braiding layer, steel wire braid and layer of polyurethane.
8. plastic flexible pipe according to claims 1 or 2 or 3 or 4 withholds connection method, it is characterised in that：The housing
Internal face be equipped with inner groove, the inner groove has the inclined-plane for meeting direction of insertion to plastic flexible pipe.
9. plastic flexible pipe according to claim 8 withholds connection method, it is characterised in that：The section of the inner groove is
Right-angled trapezium, the short transverse of right-angled trapezium and the axial direction of housing are consistent, and the inclined-plane is by inner groove and right angle ladder
The corresponding cell wall of oblique waist of shape is formed.
10. plastic flexible pipe component, including plastic flexible pipe, the pipe fitting being plugged in the port of plastic flexible pipe, withhold it is soft in plastics
Pipe and the housing on the coupling part of pipe fitting, it is characterised in that：The pipe fitting and housing appointing by claim 1-9
Connection method connection is withheld described in meaning one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710691750 | 2017-08-14 | ||
| CN2017106917501 | 2017-08-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108223943A true CN108223943A (en) | 2018-06-29 |
| CN108223943B CN108223943B (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710750587.1A Active CN108223943B (en) | 2017-08-14 | 2017-08-28 | Plastic hose buckling connection method and plastic hose assembly |
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| Country | Link |
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| CN (1) | CN108223943B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533357A (en) * | 2018-11-14 | 2019-03-29 | 中国直升机设计研究所 | A kind of easily broken self-sealing joint for helicopter fuel tank anti-crash |
| WO2020182037A1 (en) * | 2019-03-08 | 2020-09-17 | 厦门市得尔美卫浴有限公司 | Flexible pipe |
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| CN1206368A (en) * | 1995-09-20 | 1999-01-27 | 尤波诺尔股份有限公司 | Method of socketing pipe |
| CN2427704Y (en) * | 2000-05-24 | 2001-04-25 | 山东龙口特种胶管厂 | Well control rubber tube joint assembling |
| CN201496698U (en) * | 2009-07-29 | 2010-06-02 | 常州市盛士达汽车空调有限公司 | Buckle structure for automotive air conditioning pipeline |
| CN201731204U (en) * | 2009-04-23 | 2011-02-02 | 贵州航天精工制造有限公司 | Oil pipe assembly for being connected with fuel oil server of aircraft engine |
| CN201925632U (en) * | 2011-01-14 | 2011-08-10 | 李志雄 | Pressing type combined pressure pipe joint and pipe connecting structure |
| CN102414498A (en) * | 2009-02-25 | 2012-04-11 | 乔治麦尔有限公司 | Improved end connector for high pressure reinforced rubber hose |
| CN202252493U (en) * | 2011-10-18 | 2012-05-30 | 上海市塑料研究所 | Multiple-groove type sealing joint |
| CN203067985U (en) * | 2012-10-24 | 2013-07-17 | 河南航天液压气动技术有限公司 | Flexible pipe |
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2017
- 2017-08-28 CN CN201710750587.1A patent/CN108223943B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1206368A (en) * | 1995-09-20 | 1999-01-27 | 尤波诺尔股份有限公司 | Method of socketing pipe |
| CN2427704Y (en) * | 2000-05-24 | 2001-04-25 | 山东龙口特种胶管厂 | Well control rubber tube joint assembling |
| CN102414498A (en) * | 2009-02-25 | 2012-04-11 | 乔治麦尔有限公司 | Improved end connector for high pressure reinforced rubber hose |
| CN201731204U (en) * | 2009-04-23 | 2011-02-02 | 贵州航天精工制造有限公司 | Oil pipe assembly for being connected with fuel oil server of aircraft engine |
| CN201496698U (en) * | 2009-07-29 | 2010-06-02 | 常州市盛士达汽车空调有限公司 | Buckle structure for automotive air conditioning pipeline |
| CN201925632U (en) * | 2011-01-14 | 2011-08-10 | 李志雄 | Pressing type combined pressure pipe joint and pipe connecting structure |
| CN202252493U (en) * | 2011-10-18 | 2012-05-30 | 上海市塑料研究所 | Multiple-groove type sealing joint |
| CN203067985U (en) * | 2012-10-24 | 2013-07-17 | 河南航天液压气动技术有限公司 | Flexible pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533357A (en) * | 2018-11-14 | 2019-03-29 | 中国直升机设计研究所 | A kind of easily broken self-sealing joint for helicopter fuel tank anti-crash |
| WO2020182037A1 (en) * | 2019-03-08 | 2020-09-17 | 厦门市得尔美卫浴有限公司 | Flexible pipe |
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|---|---|
| CN108223943B (en) | 2020-04-28 |
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