CN1065331C - Sealing method for sleeved hydraulic pipe joint - Google Patents
Sealing method for sleeved hydraulic pipe joint Download PDFInfo
- Publication number
- CN1065331C CN1065331C CN97109816A CN97109816A CN1065331C CN 1065331 C CN1065331 C CN 1065331C CN 97109816 A CN97109816 A CN 97109816A CN 97109816 A CN97109816 A CN 97109816A CN 1065331 C CN1065331 C CN 1065331C
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- China
- Prior art keywords
- pipe
- nut
- cutting ferrule
- fittings body
- cutting
- 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 - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000007789 sealing Methods 0.000 title abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 57
- 230000003292 diminished effect Effects 0.000 claims description 20
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 239000000314 lubricant Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000010687 lubricating oil Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 3
- 239000008041 oiling agent Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 101100366060 Caenorhabditis elegans snap-29 gene Proteins 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- Joints With Pressure Members (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a sealing method for cutting sleeve type hydraulic pipe joints, which is suitable for connecting pipelines in hydraulic systems of mechanical equipment in a sealing mode. The sealing method for cutting sleeve type hydraulic pipe joints comprises: a nut, a cutting sleeve and a joint body are processed in a heat treatment mode on the basis of the original cutting sleeve type pipe joint so that the hardness of the cutting sleeve is smaller than that of the nut and the joint body, and greater than that of a pipe head; the front edge of the cutting edge of the cutting sleeve is provided with a sealing ring, and a conical shaft is prepared and then sheathed with a conical sleeve; when the pipe joint is installed, the conical shaft and the conical sleeve are firstly hammered in the pipe head, and the cutting sleeve and the nut are then installed; then the joint body is installed so that the whole cutting edge on the cutting sleeve is pressed in the outer wall of the pipe head, and the conical shaft is dismounted; thus, the present invention ensures no leakage of pipelines of equipment, eliminates the pollution and saves the lubricating oil.
Description
The present invention relates to a kind of encapsulating method that is used for sleeved hydraulic pipe joint, be applicable to the high, medium and low connection of depressing pipeline in the hydraulic system of machinery.
The quality of equipment leakage problems pipe joint was crucial in the past.Sleeved hydraulic pipe joint originally is made up of cutting ferrule nut connector body, not cutting ferrule card not tight, and tube drawing easily, the pressure effect of cutting ferrule makes pipe easily shrink bending, and promptly influencing rigidity has resistance to liquid stream again.Only be that the contact seal of dependence stiff dough is not tight, be in vibrational state especially for a long time, temperature often changes again, impels surface of contact easier to be loosening, leaks heavy more often more.Easily install because its cost simple in structure is low, so China's machinery, especially machine tool generally use it for many years.Again because its said structure feature, so its leakage problems never solves, and becomes nationwide hard nut to crack.Looked round the new large-scale production automatic control line of installing of certain factory in the recent period, found almost whole seepages of all pipe joints, all be provided with oil trap below every equipment, on the about ground of groove and the oil of seepage is all arranged on the pipe, problem is serious.
In view of above-mentioned existing problem, the purpose of this invention is to provide a kind of encapsulating method that makes the sleeved hydraulic pipe joint of pipeline ne-leakage, and have the performance that is difficult for tube drawing.
The objective of the invention is to be realized by following technological scheme: this method comprises the nut of pipe joint, the cutting ferrule with cutting edge, fittings body, between the tube head outer wall in the forward position of cutting ferrule cutting edge and the fittings body rubber seal is housed, between fittings body inner groovy bottom surface and the tube head rubber gasket is housed, the tube head mouth, the contacting of the chamfering complementation at the bottom of the groove of internal diameter chamfering and fittings body; It is characterized in that having earlier a diminished shaft, its butt end has horizontal through hole, thin end has horizontal through hole and has pin to closely cooperate, diminished shaft is with the tapered hub with its Spielpassung outward, and diminished shaft carefully holds the pin biend length of horizontal through hole must not be greater than the internal diameter of tapered hub above the tapered hub external diameter; The diminished shaft jacket wall has the mouth of axial disconnection.
At first the pipe joint member of cutting ferrule, nut, fittings body is all heat-treated, method can be undertaken by relative national standards, and the surface hardness that guarantees to make cutting ferrule will be lower than nut and fittings body greater than pipe.Manufacturing this part of diminished shaft with common iron processing then is a taper, and butt end is established a horizontal through hole, prepares against its usefulness of extracting from pipe.Thin end is also established a horizontal pin through hole, and a close-fitting pin is installed in the hole, and its both ends of the surface must not exceed the external diameter of axle sleeve, can not be lower than the internal diameter of axle sleeve, so that axle sleeve can not leave diminished shaft.A tapered hub Spielpassung with tapering is overlapped at the middle part of diminished shaft, and its axial jacket wall has one to disconnect groove, so that axle sleeve can change diameter.Above diminished shaft and tapered hub can be equipped with a plurality of special purpose parts according to the different-diameter of various pipes, and heat-treat to strengthen rigidity and surface abrasion resistance.The pipe end face should be processed into smooth smooth, and vertical with tube's axis, internal orifice fall shuttle should with the groove shapes complementation.Diminished shaft and tapered hub only can be standby for a long time otherwise damage.
Before cutting ferrule is installed, earlier the thin end of tapered hub is suppressed in the mouth of pipe, must not be higher than the pipe end face will align with the mouth of pipe, will squeeze in the taper axial pipe again, makes it fastening not loosening.If pipe not circle can firmly be suppressed again and makes till its fourth contact.To refill upper cap nut and cutting ferrule on the pipe then, pipe end is inserted exert oneself in the fittings body with the nut handle tightly two road cutting ferrule cutting edges are all snapped in the tube wall, till outward appearance is seamless again.Under the inexperienced situation of first operation, must check like this, after being arranged, experience to spot-check.And then unload the taking-up diminished shaft, on the position of cutting ferrule chucking, have other sealing material of toughness and flexible strong adhesion after putting the oil resistant rubber seal ring or also can coating curing again, as the sealer class again tightly both can.Perhaps add oil resistant rubber sealing gasket or sealer silicon sealant and so at groove.The oiling agent that will should be coated with the anti-extreme pressure of last layer on the inclined-plane attrition surface of nut and screw thread and fittings body in advance is as molybdenum disulfide, graphite etc.Groove should be processed in the place that contacts with pipe end on fittings body in addition, and pipe end face internal diameter is answered chamfered edge, and shape and groove complementation are with the contraction deformation of avoiding pipe and the rigidity of reinforced pipe.
The present invention compared with the prior art, between each assembly parts, the surface hardness of cutting ferrule is greater than pipe and be lower than nut and fittings body, the distribution of hardness has not only guaranteed the dark of cutting ferrule two road cutting edge cards like this, tight, good seal, and improved the working life and the wear resistance of fittings body and nut, through loading and unloading repeatedly also chamfered edge not.Increase the anti-extreme pressure oiling agent again and also significantly reduce friction, most power is used on the chucking of cutting ferrule two road cutting edges and makes the darker of its card.Two road cutting edges of cutting ferrule used to stick into together, and present two road cutting edges stick into entirely and do not stay the slit in the tube wall.The interaction energy of diminished shaft keeps the pipe rigidity, has avoided the consumption in power pipe elasticity and the plastic deformation.Ropy in addition pipe out of roundness is very big, and the cutting ferrule pipe joint can not be used, and diminished shaft can make its fourth contact, has satisfied quality requirement.Pure rigid sealing is insecure, because it is subjected to multiple factor affecting, the degree of workpiece surface finish contact and rising-heat contracting-cold and impact etc. all easily make surface of contact become flexible and produce seepage.On the key position of this cutting ferrule chucking, add a soft elastic material, increased by an elastic soft sealing again, remedied the deficiency of hard sealing.Make sealing more closely reliable, this elastic material has been blocked all three roads that liquid may pass through.Groove has increased pipe end rigidity, reduces the rigidity that distortion has also strengthened whole pipe joint, has also avoided the resistance that liquid is produced because of pipe end shrink mouth.Facts have proved the pipe joint ne-leakage of this device, pipe is undergauge not, tube drawing not, and long service life thoroughly solves the long-term seepage of sleeved hydraulic pipe joint, short big old difficult problem of tube drawing oil spout and working life occurs.
Fig. 1 is a sleeved hydraulic pipe joint structural representation of the present invention.
Fig. 2 is the schematic representation of cutting ferrule two road cutting edges of the present invention and fittings body upper groove and sealing material position.
1--carefully holds pin-and-hole, 2--tapered hub opening, 3--tapered hub, 4--diminished shaft, the horizontal through hole of 5--diminished shaft butt end, 6--oil resistant rubber seal ring, 7--tube head, 8--cutting ferrule, 9--nut, 10, fittings body, 11-fittings body groove, 12--cutting ferrule two road junctions.
Specifically describe embodiments of the invention below in conjunction with accompanying drawing:
For example to a kind of external diameter Φ 28mm, internal diameter 24mm of pipeline, wall thickness 2mm, the end face filing also makes it smooth smooth vertical with tube's axis, the internal diameter chamfered edge, oil resistant rubber seal ring external diameter Φ 22mm, diameter of phi 1.5mm, anti-extreme pressure oiling agent are its shape and groove 11 complementations behind the molybdenum disulfide pulvis tube head chamfered edge.Each parts material of pipe joint and heat treatment method are the same with NBS.Hardness profile: cutting ferrule 8 surfaces are HV500, fittings body and nut surface HV800.And with molybdenum disulfide pulvis on inclined-plane in the fittings body and nut inner thread and the coated on bottom side.Diminished shaft butt end Φ 22mm has a Φ 5mm hole apart from end face 5mm, and oil end Φ 18mm has a Φ 5mm hole apart from end face 5mm place, in adorn one and the long 23mm of the friction tight pin in hole.Taper axial length 77mm, a tapered hub is adorned at the middle part, and tapering is identical with axle, the external diameter Φ 24mm of butt end, internal diameter Φ 20mm axially opens a wide 2mm of mouth.
Operating process:
It is vertical with tube's axis that Φ 28mm wall thickness 2mm is managed the whole polishing of an end face filing, end face internal orifice chamfered edge and groove 11 complementary dimensioned, load onto nut and cutting ferrule successively, refill the epicone oblique crank Z, axle sleeve will flush with the pipe end face, suppress diminished shaft more inwards, tube opening and tapered hub are tightly contacted firmly, refill the upper connection body, nut is exerted oneself tight with removing son, tight degree is wanted two road cutting edges of cutting ferrule are sticked in the tube wall entirely, till outward appearance is seamless.Take off pipe again and unload diminished shaft, again the oil resistant rubber seal ring is enclosed within the outside of cutting ferrule cutting edge chucking, refill in fittings body,, unload inspection oil resistant rubber seal ring and should not have breakage with removing son tight, and the cutting ferrule cutting edge should to stick into tube wall entirely seamless.
Reach 60MPa through product quality supervision and testing institute test result Φ 28 specifications, do not take place to leak and the structural failure situation in 20 minutes.
Claims (1)
1, the encapsulating method that is used for sleeved hydraulic pipe joint, comprise the nut (9) of pipe joint, cutting ferrule (8), fittings body (10) with cutting edge, between tube head (7) outer wall in the forward position of cutting ferrule (8) cutting edge and the fittings body (10) rubber seal is housed, between fittings body (10) inner groovy (11) bottom surface and the tube head (7) rubber gasket is housed, tube head (7) mouthful, the contacting of the chamfering complementation at the bottom of the groove of internal diameter chamfering and fittings body (10); It is characterized in that having earlier a diminished shaft (4), its butt end has horizontal through hole (5), thin end has horizontal through hole and has pin (1) to closely cooperate, diminished shaft (4) is outer to be with tapered hub (3) with its Spielpassung, and diminished shaft (4) is carefully held pin (1) the biend length of horizontal through hole to surpass tapered hub (3) external diameter and is greater than the internal diameter of tapered hub (9); Tapered hub (3) wall has the mouth (2) of axial disconnection; Nut (9), cutting ferrule) (8), fittings body (10) to heat-treat make cutting ferrule (8) surface hardness greater than the hardness of having managed less than the hardness of nut (9) with fittings body (10); Before molybdenum disulfide or graphite lubricant are coated in the inclined-plane of nut (9) internal surface and fittings body (10) at installation cutting ferrule (8), earlier the thin end of tapered hub (3) is suppressed in the mouth of pipe and alignd with the mouth of pipe, diminished shaft (4) being squeezed in pipe makes it fastening motionless again, again pipe end is inserted in the fittings body (10) and firmly make the cutting edge on its cutting ferrule all be pressed in the tube wall nut tightening loading onto nut (9) and cutting ferrule (8) on the pipe (7) then, and then take off diminished shaft (4), the sealing material that after the position of cutting ferrule chucking puts oil resistant rubber seal ring (6) or coats curing, has toughness and flexible strong adhesion again, after tighten again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97109816A CN1065331C (en) | 1997-04-23 | 1997-04-23 | Sealing method for sleeved hydraulic pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97109816A CN1065331C (en) | 1997-04-23 | 1997-04-23 | Sealing method for sleeved hydraulic pipe joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1182179A CN1182179A (en) | 1998-05-20 |
| CN1065331C true CN1065331C (en) | 2001-05-02 |
Family
ID=5171218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97109816A Expired - Fee Related CN1065331C (en) | 1997-04-23 | 1997-04-23 | Sealing method for sleeved hydraulic pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1065331C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307470C (en) * | 2002-03-19 | 2007-03-28 | 富士通株式会社 | Apparatus and method for manufacturing bonded substrates |
| CN100510497C (en) * | 2004-08-10 | 2009-07-08 | 福士流体有限公司 | Metallic cutting ring |
| CN101137863B (en) * | 2005-02-14 | 2010-04-21 | 斯瓦戈洛克公司 | Union having fitting with lubricated ferrule and method for increasing fatigue cycle life |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2613120A1 (en) * | 2005-06-27 | 2007-01-04 | Swagelok Company | Tube fitting |
| CN100451423C (en) * | 2007-06-22 | 2009-01-14 | 江苏海纳机电制造有限公司 | Pipe joint rear cutting ferrule and heat processing method |
| CN101713479B (en) * | 2009-11-07 | 2012-05-02 | 浙江金字机械电器有限公司 | Stainless steel special rubber composite sealing cutting sleeve |
| CN102889439A (en) * | 2011-07-21 | 2013-01-23 | 贵州工信机电科技有限公司 | Hydraulic pipe joint sleeve |
| FR2987881B1 (en) * | 2012-03-07 | 2014-03-14 | Jpb Systeme | SECURE CONNECTION DEVICE, IN PARTICULAR FOR PIPING, TIP FOR THIS DEVICE AND METHOD FOR MANUFACTURING AN ASSOCIATED NUT. |
| CN105423013A (en) * | 2015-12-08 | 2016-03-23 | 四川海搏液压机械有限公司 | Hydraulic pipe connecting piece |
| CN107314142B (en) * | 2016-04-26 | 2024-03-19 | 全球能源互联网研究院 | A DC converter valve cooling waterway corrosion protection and anti-leakage device |
| CN107378431A (en) * | 2017-07-20 | 2017-11-24 | 苏州凯磊胜自动化科技有限公司 | Pen core assembly machine main shaft support meanss and main shaft installation method |
| CN111442142B (en) * | 2020-05-19 | 2025-03-04 | 上海开恒光岳机械制造有限公司 | Anti-loosening mechanism of a ferrule type joint |
| CN114688362A (en) * | 2022-04-24 | 2022-07-01 | 大连新钢液压管件有限公司 | Pressed Pipe Fittings |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0753698A1 (en) * | 1995-07-08 | 1997-01-15 | Armaturenfabrik Hermann Voss GmbH + Co. | Plug connector for connecting pressure conduits |
-
1997
- 1997-04-23 CN CN97109816A patent/CN1065331C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0753698A1 (en) * | 1995-07-08 | 1997-01-15 | Armaturenfabrik Hermann Voss GmbH + Co. | Plug connector for connecting pressure conduits |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307470C (en) * | 2002-03-19 | 2007-03-28 | 富士通株式会社 | Apparatus and method for manufacturing bonded substrates |
| CN100510497C (en) * | 2004-08-10 | 2009-07-08 | 福士流体有限公司 | Metallic cutting ring |
| CN101137863B (en) * | 2005-02-14 | 2010-04-21 | 斯瓦戈洛克公司 | Union having fitting with lubricated ferrule and method for increasing fatigue cycle life |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1182179A (en) | 1998-05-20 |
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