CA1235166A - High pressure hose fitting - Google Patents
High pressure hose fittingInfo
- Publication number
- CA1235166A CA1235166A CA000516827A CA516827A CA1235166A CA 1235166 A CA1235166 A CA 1235166A CA 000516827 A CA000516827 A CA 000516827A CA 516827 A CA516827 A CA 516827A CA 1235166 A CA1235166 A CA 1235166A
- Authority
- CA
- Canada
- Prior art keywords
- hose
- end segment
- fitting
- ferrule
- cords
- 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.)
- Expired
Links
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
ABSTRACT
A high pressure hose fitting which includes a crimpable sleeve for use over a hose and a conical ferrule that separates the cord layer of the hose from the inner linings and clamps the cord layer to the sleeve. A housing enclosed the fitting and provides the clamping force. An O-ring between the ferrule and the housing aids in sealing. All parts are so designed that an increase in pressure increases the sealing force and clamping force.
A high pressure hose fitting which includes a crimpable sleeve for use over a hose and a conical ferrule that separates the cord layer of the hose from the inner linings and clamps the cord layer to the sleeve. A housing enclosed the fitting and provides the clamping force. An O-ring between the ferrule and the housing aids in sealing. All parts are so designed that an increase in pressure increases the sealing force and clamping force.
Description
12~16~
HIGH PRESSURE HOSE FITTING
FIELD OF INVENTION:
This invention pertain to hose fittings, particularly, to ultra high pressure hose fitting for use at pressures over A Jo, owe Go .0,00~ psi, with still greater particularity to ultra high pressure hose fittings for use with reinforced hose.
BACKGROUND OF INVENTION:
In water jet cutting and other high pressure fluid applications it is often desirable to use flexible hose to convey the fluid. In applications where the pressure is ultra high as in those over 10,000 pounds per square inch, the hose it commonly constructed of a plastic line surrounded by multiple layers of reinforcing material. Hose fitting are required to attach such a hose to another hose or to equipment such as intensifiers or cutters.
An ultra high pressure hose fitting normally includes a barbed nipple which is pressed inside the liner tube of the hose. An outer sleeve is then swayed over the reinforcing layers of the hose. The hose is thus clamped between the nipple and the sleeve. As pressure is applied to the hose a force is generated that tends to separate the nipple from the hose permitting a leak. This tendency is resisted by the clamping force exerted by the sleeve. When the pressure is very high the clamping force must be increased. If the nipple is not increased in thickness it wilt be collapsed by the clamping ' , . . .
12:~53L66 force when high pressure is not present, when, for example, the intensifier is off. The thickening of the nipple results in a Constriction of the bore at the fitting. The constriction produced become the limiting factor in the carrying capacity of the hose. Accordingly, a demand exists for an ultra high pressure hose fitting which does not constrict the hose but is able to withstand pressures in excess of 10,000 psi.
SUMMARY OF THE INVENTION: -The invention provides an ultra high pressure hose fitting which does not constrict the hose. The fitting is comparable in cost and complexity to present fittings.
The invention includes a sleeve which is swayed to the reinforcing layers of the hose which are flared away from the liner by a conical ferrule. The ferrule also surrounds the liner but does not obstruct the flow path. A housing surrounds the device and provides the proper tension. An O-ring seals to the housing and the hose liner to prevent leakage. The fitting is so designed that the pressure present in the hose increases the sealing and retention forces. This structure it particularly useful at pressures between 10,000 and 100,000 psi.
BRIEF DESCRIPTION OF THE Drawings Figure 1 it a section elevation view of the invention.
DETAILED DESCRIPTION OF THE DRAWINGS:
-Figure 1 is a section elevation view of the invention through a centerline. It is understood that all parts are I, _ symmetrical around the centerline unless otherwise indicated. Arose 1 having an inner lining 2 and reinforcing cords 3 enters the outer housing 4 at one end 6. Hose 1 is the type used in ultra high pressure applications which usually includes a plastic liner 2 around which are wound cords of reinforcing material in thermoplastic. Upon entering housing 4 hose 1 is surrounded by a crimped sleeve 7 which is lightly swayed to reinforcing cord 3. Sleeve 7 is flat at one end 8 which it butted up against end 6 of housing 4 and tapered internally at the other end 19. A gap 11 remains between the outer surface of sleeve 7 and the inner surface of housing 6. Cords 3 of hose 1 are flared away from liner 2 and pass over a conical ferrule 12.
Ferrule 12 is a hollow conical member with a projection 13. An outlet fitting 14 is thread ably attached to the other end 16 of housing 6. When outlet fitting 14 is rotated into housing 6 ferrule 12 is pushed against cords 2 clamping cords 2 into place. Housing 4 reacts against sleeve 7 to prevent slippage of sleeve 7. An O-ring 17 is situated between projection 13 of ferrule 12, the outside of liner 2 and a cavity 18 on outlet fitting 14. O-ring 17 seals liner 2 against leakage to the outsit-. Extrusion of O-ring 17 it prevented by projection 13 of ferrule 12. Projection 13 expands outward toward housing 14 when high pressure it present Inside liner 2 closing any extrusion gaps.
In operation, as pressure inside liner 2 it increased, all ,7 ....
HIGH PRESSURE HOSE FITTING
FIELD OF INVENTION:
This invention pertain to hose fittings, particularly, to ultra high pressure hose fitting for use at pressures over A Jo, owe Go .0,00~ psi, with still greater particularity to ultra high pressure hose fittings for use with reinforced hose.
BACKGROUND OF INVENTION:
In water jet cutting and other high pressure fluid applications it is often desirable to use flexible hose to convey the fluid. In applications where the pressure is ultra high as in those over 10,000 pounds per square inch, the hose it commonly constructed of a plastic line surrounded by multiple layers of reinforcing material. Hose fitting are required to attach such a hose to another hose or to equipment such as intensifiers or cutters.
An ultra high pressure hose fitting normally includes a barbed nipple which is pressed inside the liner tube of the hose. An outer sleeve is then swayed over the reinforcing layers of the hose. The hose is thus clamped between the nipple and the sleeve. As pressure is applied to the hose a force is generated that tends to separate the nipple from the hose permitting a leak. This tendency is resisted by the clamping force exerted by the sleeve. When the pressure is very high the clamping force must be increased. If the nipple is not increased in thickness it wilt be collapsed by the clamping ' , . . .
12:~53L66 force when high pressure is not present, when, for example, the intensifier is off. The thickening of the nipple results in a Constriction of the bore at the fitting. The constriction produced become the limiting factor in the carrying capacity of the hose. Accordingly, a demand exists for an ultra high pressure hose fitting which does not constrict the hose but is able to withstand pressures in excess of 10,000 psi.
SUMMARY OF THE INVENTION: -The invention provides an ultra high pressure hose fitting which does not constrict the hose. The fitting is comparable in cost and complexity to present fittings.
The invention includes a sleeve which is swayed to the reinforcing layers of the hose which are flared away from the liner by a conical ferrule. The ferrule also surrounds the liner but does not obstruct the flow path. A housing surrounds the device and provides the proper tension. An O-ring seals to the housing and the hose liner to prevent leakage. The fitting is so designed that the pressure present in the hose increases the sealing and retention forces. This structure it particularly useful at pressures between 10,000 and 100,000 psi.
BRIEF DESCRIPTION OF THE Drawings Figure 1 it a section elevation view of the invention.
DETAILED DESCRIPTION OF THE DRAWINGS:
-Figure 1 is a section elevation view of the invention through a centerline. It is understood that all parts are I, _ symmetrical around the centerline unless otherwise indicated. Arose 1 having an inner lining 2 and reinforcing cords 3 enters the outer housing 4 at one end 6. Hose 1 is the type used in ultra high pressure applications which usually includes a plastic liner 2 around which are wound cords of reinforcing material in thermoplastic. Upon entering housing 4 hose 1 is surrounded by a crimped sleeve 7 which is lightly swayed to reinforcing cord 3. Sleeve 7 is flat at one end 8 which it butted up against end 6 of housing 4 and tapered internally at the other end 19. A gap 11 remains between the outer surface of sleeve 7 and the inner surface of housing 6. Cords 3 of hose 1 are flared away from liner 2 and pass over a conical ferrule 12.
Ferrule 12 is a hollow conical member with a projection 13. An outlet fitting 14 is thread ably attached to the other end 16 of housing 6. When outlet fitting 14 is rotated into housing 6 ferrule 12 is pushed against cords 2 clamping cords 2 into place. Housing 4 reacts against sleeve 7 to prevent slippage of sleeve 7. An O-ring 17 is situated between projection 13 of ferrule 12, the outside of liner 2 and a cavity 18 on outlet fitting 14. O-ring 17 seals liner 2 against leakage to the outsit-. Extrusion of O-ring 17 it prevented by projection 13 of ferrule 12. Projection 13 expands outward toward housing 14 when high pressure it present Inside liner 2 closing any extrusion gaps.
In operation, as pressure inside liner 2 it increased, all ,7 ....
2~66 sealing and holding forces increase as well. The interface force between sleeve 7 and reinforcing cords 2 increases as pressure tries to swell hose 1. This, in turn, increase the friction forces tending to hold the fitting to hose 1. The increase in pressure also forces lines 2 more tightly against the interior of ferrule 12 assuring a liquid tight seal. Finally, the pressure presses projection 13 of ferrule 12 against the interior of outlet 14 providing a liquid tight seal without extrusion of O-ring 17. Parts 4, 7, 12 and 14 would normally be constructed of metal chosen for strength consistent with the forces present.
The embodiment shown its illustrative only, the invention being defined solely by the claims attached:
Jo "
The embodiment shown its illustrative only, the invention being defined solely by the claims attached:
Jo "
Claims (6)
1. A high pressure hose fitting for use in combination with a hose having an inner lining which is encircled by a layer of reinforcing cords and which defines the internal passageway of the hose, said hose fitting comprising:
an end portion of said hose, said end portion including an end segment of said inner lining and a corresponding end segment of said layer of reinforcement cords which has a lengthwise end section thereof separated from a lengthwise end section of said lining end segment, the latter being disposed in direct communication with said hose passageway along its entire extent and being constructed of a material such that high pressure within said passageway will cause it to swell outwardly to a limited extent;
a cylindrical housing having an opening for admission of said hose end portion at one end and a threaded opening at the other end for receiving an outlet fitting in a thread connected manner;
an outlet fitting threadably connected to said housing, said outlet fitting having a hollow interior for admission of and sealing to the liner end segment of said hose and a recess extending around the outside of said liner end segment;
a crimped sleeve disposed within said housing in intimate contact with the outside surface of the end segment of said cords layer, one end of said sleeve being disposed adjacent to the one end of said housing and defining a conical recess at its other end for gripping to and receiving the end segment of said cords layer;
a conical, barbless ferrule having a hollow interior for receiving and sealing to the exterior of said inner liner end section of said liner end segment and a conical outer surface for clamping the separated end section of said cords layer of said hose end portion to the conical recess of said sleeve, said ferrule also including a projection which is expandable to a limited extent and which is located adjacent to the recess of said outlet fitting for sealing to said outlet fitting; and an o-ring between said projection of said ferrule and said outlet fitting for sealing said outlet fitting to said ferrule.
an end portion of said hose, said end portion including an end segment of said inner lining and a corresponding end segment of said layer of reinforcement cords which has a lengthwise end section thereof separated from a lengthwise end section of said lining end segment, the latter being disposed in direct communication with said hose passageway along its entire extent and being constructed of a material such that high pressure within said passageway will cause it to swell outwardly to a limited extent;
a cylindrical housing having an opening for admission of said hose end portion at one end and a threaded opening at the other end for receiving an outlet fitting in a thread connected manner;
an outlet fitting threadably connected to said housing, said outlet fitting having a hollow interior for admission of and sealing to the liner end segment of said hose and a recess extending around the outside of said liner end segment;
a crimped sleeve disposed within said housing in intimate contact with the outside surface of the end segment of said cords layer, one end of said sleeve being disposed adjacent to the one end of said housing and defining a conical recess at its other end for gripping to and receiving the end segment of said cords layer;
a conical, barbless ferrule having a hollow interior for receiving and sealing to the exterior of said inner liner end section of said liner end segment and a conical outer surface for clamping the separated end section of said cords layer of said hose end portion to the conical recess of said sleeve, said ferrule also including a projection which is expandable to a limited extent and which is located adjacent to the recess of said outlet fitting for sealing to said outlet fitting; and an o-ring between said projection of said ferrule and said outlet fitting for sealing said outlet fitting to said ferrule.
2. A high pressure hose fitting for use in combination with a hose having an inner lining which is encircled by a layer of reinforcing cords and which defines the internal passageway of the hose, said hose fitting comprising:
an end portion of said hose including an end segment of said inner lining and a corresponding end segment of said layer of reinforced cords which has a lengthwise end section thereof separated from a lengthwise end section of said lining end segment, the latter being disposed in direct communication with said hose passageway along its entire extent and being constructed of a material such that high pressures within said passageway will cause it to swell outwardly to a limited extent;
means surrounding said hose end portion for engaging the outer surface of said cords layer end segment including the outer surface of its lengthwise end section;
a conical, barbless ferrule having a hollow interior for receiving and sealing to the exterior surface of the lengthwise end section of said lining end segment and a conical outer surface for engaging against the inner surface of the lengthwise end section of said cords layer end segment;
means including an outlet fitting engaging both said barbless ferrule and a endmost part of the lengthwise section of said lining end segment; and an o-ring disposed around the lengthwise end section of said lining ing end segment between said ferrule and said outlet fitting for providing a seal thereat.
an end portion of said hose including an end segment of said inner lining and a corresponding end segment of said layer of reinforced cords which has a lengthwise end section thereof separated from a lengthwise end section of said lining end segment, the latter being disposed in direct communication with said hose passageway along its entire extent and being constructed of a material such that high pressures within said passageway will cause it to swell outwardly to a limited extent;
means surrounding said hose end portion for engaging the outer surface of said cords layer end segment including the outer surface of its lengthwise end section;
a conical, barbless ferrule having a hollow interior for receiving and sealing to the exterior surface of the lengthwise end section of said lining end segment and a conical outer surface for engaging against the inner surface of the lengthwise end section of said cords layer end segment;
means including an outlet fitting engaging both said barbless ferrule and a endmost part of the lengthwise section of said lining end segment; and an o-ring disposed around the lengthwise end section of said lining ing end segment between said ferrule and said outlet fitting for providing a seal thereat.
3. A high pressure fitting according to Claim 2 wherein said means surrounding said hose end portion includes a housing for containing said hose end portion and means separate from and within said housing serving as said means engaging the outer surface of said cords layer end segment, said housing and outlet fitting including cooperating means for thread connecting the two together in a way which causes the outlet fitting to engage both said ferrule and said o-ring.
4. A high pressure fitting according to Claim 3 wherein said housing and said separate means engaging the outer surface of said cords layer end segment are configured so that the latter means is slidable within said housing when there is ambient pressure within the hose end section.
5. A high pressure hose fitting according to Claim 2 wherein said barbless ferrule includes a projection which is expandable to a limited extent and which engages against one said of said o-ring, said projection and said outlet fitting together defining an annular recess for containing said o-ring.
6. A high pressure hose fitting according to Claim 2 wherein said inner lining end segment is constructed of plastic and wherein said means engaging the outer surface of said cords layer end segment, said ferrule and said outlet fitting are constructed of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000516827A CA1235166A (en) | 1986-08-26 | 1986-08-26 | High pressure hose fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000516827A CA1235166A (en) | 1986-08-26 | 1986-08-26 | High pressure hose fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1235166A true CA1235166A (en) | 1988-04-12 |
Family
ID=4133806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000516827A Expired CA1235166A (en) | 1986-08-26 | 1986-08-26 | High pressure hose fitting |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1235166A (en) |
-
1986
- 1986-08-26 CA CA000516827A patent/CA1235166A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |