CN101625056A - Double-ferrule type pipe joint of double-sealing and double-fastening support and using method thereof - Google Patents
Double-ferrule type pipe joint of double-sealing and double-fastening support and using method thereof Download PDFInfo
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- CN101625056A CN101625056A CN200810012277A CN200810012277A CN101625056A CN 101625056 A CN101625056 A CN 101625056A CN 200810012277 A CN200810012277 A CN 200810012277A CN 200810012277 A CN200810012277 A CN 200810012277A CN 101625056 A CN101625056 A CN 101625056A
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- 238000007789 sealing Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 18
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000007747 plating Methods 0.000 claims abstract description 7
- 229910052709 silver Inorganic materials 0.000 claims abstract description 7
- 239000004332 silver Substances 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims description 121
- 150000004767 nitrides Chemical class 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 5
- 238000005275 alloying Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 4
- 238000005121 nitriding Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to technology of ferrule type pipe joints, in particular to a double-ferrule type pipe joint of a double-sealing and double-fastening support and a using method thereof. The double-ferrule type pipe joint consists of a joint body, a front ferrule, a rear ferrule and a nut; the joint body is connected with the nut by screw thread; the front ferrule and the rear front ferrule are arranged between the joint body and the nut in turn; the surface of the rear ferrule is subjected to Cr-rich ion nitrizing treatment; and the inner surface of the nut is subjected to silver plating treatment. A pipe is inserted into the joint body, the nut is screwed down by a spanner, then the nut pushes the rear ferrule to move forwards, simultaneously the rear ferrule pushes the front ferrule forwards, an inner conical hole in the joint body inwards extrudes the front ferrule so that the front ferrule eliminates the clearance between the inside diameter thereof and the outside diameter of the pipe, and a double-insurance high-strength pressure-proof sealing structure of the double-sealing and double-fastening support is formed. The double-ferrule type pipe joint has the advantages of reliable sealing property, convenient use and good repeated assembly and disassembly properties, can greatly improve the connection strength of a pipeline system, and greatly reduce the mounting moment.
Description
Affiliated technical field
The present invention relates to the Bite type fittings technology, the withstand voltage pair of Bite type fittings of dual fail-safe high strength and the using method thereof that especially work in oil, gas and the general aggressive medium and require double-sealing, two-restriction to support admittedly.
Background technique
Pipe-line system is the carrier of various flowing mediums, is widely used in all trades and professions, and it not only plays an important role in industrial and agricultural production, national defence and scientific research, and closely related with our daily life.Along with every science and technology development, the application area of pipe-line system is not only more and more wider, its Placement is also constantly increasing and is upgrading, and the safety reliability that the convenience of pipe-line system installation and pipe-line system are used had higher requirement, therefore FERRULETYPE pipeline joint produces.
Bite type fittings is a kind of convenient, reliable, is easy to the connecting mode of the mesohigh pipeline of installing/dismounting.Invented in nineteen thirty by German ERMETO company the earliest, through the development of over half a century, Bite type fittings has become the most advanced in the world a kind of pipe joint.At present, Bite type fittings is widely used in industries such as chemical industry, machinery, electronics, electric power, space flight, military project, medicine, light industry and scientific research, and working pressure can be up to 40MPa.
Bite type fittings specifically is divided into single deck tape-recorder shell type pipe joint and two kinds of two Bite type fittingss again, and the deficiency of single deck tape-recorder shell type pipe joint is: (1) no temperature difference compensation function, and sealability descends greatly in the big environment of temperature variation; (2) repeat the dismounting poor performance, dismounting repeatedly back is easily leaked, and cutting ferrule or fittings body just can not be used; (3) assembling technical ability is required height, need the cutting ferrule prepackage device of special special use, the conformity of assembling is poor; (4) shock resistance, vibrations poor-performing.
In order to overcome the above defective of single deck tape-recorder shell type pipe joint, two Bite type fittingss have been developed subsequently again the America and Europe, because its consummate technology, good quality, graceful outward appearance, the sealability that leak outstanding " 0 " is a dark horse, show one's capabilities in fields such as machinery, hydraulic pressure, air-conditioning, space flight, become a kind of outstanding pipeline connecting mode.
Two Bite type fittingss are introduced external product in the application of China since the eighties in last century, and the history in more than 20 year has been arranged.The nineties in last century, domestic many enterprises begin imitated two Bite type fittingss of producing.Yet up to the present product performance are compared still with external imported product and are had a long way to go.The enterprise that major part is had relatively high expectations still spends high price from external import, and is in great demand.But, too high from external import cost, therefore can't realize in batches, further apply thereby hindered it.Its main deficiency is: (1) join strength is low; (2) anti-vibration performance is poor; (3) insufficient strength of back cutting ferrule cutting edge or cutting edge hardness are too high and cause the cutting edge cracking and peel off; (4) along with the increase sealability variation of load and ambient temperature.
Summary of the invention
Low in order to overcome the join strength that has two Bite type fittingss now, the insufficient strength of back cutting ferrule cutting edge or cutting edge hardness are too high and cause cutting edge cracking and peel off and along with the defectives such as increase sealability variation of load and ambient temperature, the invention provides a kind of double-sealing, two Bite type fittingss and using method thereof that two-restriction supports admittedly, the two Bite type fittingss of this kind have not only increased substantially the join strength of pipe joint, and the cutting ferrule cutting edge has under the prerequisite of intensity after satisfying, thereby the good plasticity and toughness of assurance cutting edge maintenance can be avoided the cracking of cutting ferrule cutting edge and peel off, make pipe joint sealability be improved significantly, the join strength of pipe-line system and sealability are significantly improved under heating environment.
The present invention solves the technological scheme that its technical problem takes:
Two Bite type fittingss that a kind of double-sealing, two-restriction support admittedly, have fittings body, cutting ferrule, nut, fittings body and nut are by being threaded, between fittings body, nut, be provided with cutting ferrule, cutting ferrule is two cutting ferrules that preceding cutting ferrule, back cutting ferrule are formed, preceding cutting ferrule, back cutting ferrule are installed between fittings body, the nut successively, preceding cutting ferrule is a cone-shaped ring, preceding cutting ferrule and fittings body pass through cone match, back cutting ferrule is flanged (FLGD) annulus, the flange end of back cutting ferrule cooperates with the nut internal surface, and the back cutting ferrule the other end and preceding cutting ferrule pass through cone match; There is rich Cr nitriding layer on the surface of back cutting ferrule, and the nut internal surface has silver plating layer.
Two Bite type fittingss that described double-sealing, two-restriction support admittedly, the back inner conical surface angle [alpha] of preceding cutting ferrule is the 76-85 degree.
Two Bite type fittingss that described double-sealing, two-restriction support admittedly adopt the brush silver plating process that the nut internal surface is carried out silver-plated processing.
Two Bite type fittingss that described double-sealing, two-restriction support admittedly, the surface of back cutting ferrule adopt Cr ion-rich nitride to handle, and Cr content is 20-40wt% in the Cr ion-rich nitride layer, and nitrided layer hardness is at Hv
0.34The 00-800 scope is interior, alloying layer thickness is adjustable in 0.02-0.1 millimeter scope.
The using method of two Bite type fittingss that described double-sealing, two-restriction support admittedly, concrete steps are as follows:
(1) pipe is inserted in the fittings body, pipe is inserted into fittings body one bottom portion always;
(2) fastening nut, nut propelling back cutting ferrule travels forward, and while back cutting ferrule promotes preceding cutting ferrule forward, cutting ferrule before the internal taper hole of fittings body inwardly pushes, its internal diameter of cutting ferrule elimination and the gap between the tube outer diameter before making;
(3) along with the inwardly motion forward of preceding cutting ferrule, the trailing edge of preceding cutting ferrule is lifted by the back cutting ferrule and shifts to the position that the fittings body internal taper hole seals, and along with the increase of nut thrust, preceding cutting ferrule is pressed into pipe makes pipe produce the support that bigger distortion becomes first order fit sealing; The increase of fittings body internal taper hole and preceding cutting ferrule area of contact simultaneously, bigger resistance force the front end of back cutting ferrule to move inward, thereby form the support of second level fit sealing on pipe;
(4) when screwing up with a wrench nut 11/4 circle, nut has been finished sealing and tight effect together in the movement process that advances, so just formed the dual fail-safe high strength cylindrical sealing structure that double-sealing, two-restriction support admittedly.
The invention has the beneficial effects as follows:
(1) correction of cutting ferrule geometrical shape size of the present invention and the silver-plated processing of nut internal surface.The back inner conical surface angle design of preceding cutting ferrule is about 80 degree, thereby has improved the variable and the moment of cutting ferrule; Adjust fittings body bottom geometrical shape, change the partial circle taper into from intrinsic right angle type, both guaranteed the straightness accuracy of pipe like this when pipe is installed, the trace that has increased again when pipe is installed is regulated.Therefore, mounting torque can reduce greatly.After adopting the brush silver plating process that the nut internal surface is carried out silver-plated processing, the self-lubricating property in the time of not only can improving screw-thread fit, reduce moment, and can prevent effectively that screw-thread fit from killing phenomenon;
(2) the surface-functional enhancement process of cutting ferrule behind the present invention.Through textual criticism in many ways, final definite back cutting ferrule adopts Cr ion-rich nitride to handle.Cr content is 20-40wt% in the Cr ion-rich nitride layer, and nitrided layer hardness is at Hv
0.34The 00-800 scope is interior, alloying layer thickness is adjustable in 0.02-0.1 millimeter scope.Handle by Cr ion-rich nitride, its material internal still can keep enough plasticity and toughness when the surface strength of back cutting ferrule was improved, thereby can increase substantially the join strength of pipe joint, had suppressed the cracking of cutting edge effectively and peeled off.In addition, owing to high Cr content in the Cr ion-rich nitride layer, can significantly improve the join strength and the sealing of pipe-line system under heating environment.
(3) the present invention is simple in structure, sealability is reliable, easy to use, the repeated disassembled and assembled performance is good, can increase substantially the join strength of pipe-line system, mounting torque reduces greatly, anti-vibration and anti-threaded engagement performance be improved significantly, the join strength of pipe-line system and sealability are significantly improved under heating environment.
Description of drawings
Fig. 1 (a)-Fig. 1 (b) is a linkage structure principle schematic of the present invention.Fig. 1 (a) is a plan view; Fig. 1 (b) is preceding cutting ferrule profile.Wherein, 1 fittings body; Cutting ferrule before 2; 3 back cutting ferrules; 4 nuts; Male cone (strobilus masculinus) before 5; 6 back inner conical surfaces.
Fig. 2 is embodiment's 1 linkage structure schematic representation.
Fig. 3 is embodiment's 2 linkage structure schematic representation.
Fig. 4 is embodiment's 3 linkage structure schematic representation.
Fig. 5 is embodiment's 4 linkage structure schematic representation.
Fig. 6 is embodiment's 5 linkage structure schematic representation.
Fig. 7 is embodiment's 6 linkage structure schematic representation.
Fig. 8 is embodiment's 7 linkage structure schematic representation.
Fig. 9 is embodiment's 8 linkage structure schematic representation.
Figure 10 is embodiment's 9 linkage structure schematic representation.
Figure 11 is embodiment's 10 linkage structure schematic representation.
Figure 12 is embodiment's 11 linkage structure schematic representation.
Figure 13 is embodiment's 12 linkage structure schematic representation.
Figure 14 is embodiment's 13 linkage structure schematic representation.
Figure 15 is embodiment's 14 linkage structure schematic representation.
Figure 16 is embodiment's 15 linkage structure schematic representation.
Figure 17 is embodiment's 16 linkage structure schematic representation.
Figure 18 is embodiment's 17 linkage structure schematic representation.
Figure 19 is embodiment's 18 linkage structure schematic representation.
Figure 20 is that the stainless steel pipe connection back cutting ferrule photo in back is handled in rich Cr nitriding.
Figure 21 is the end face pattern of Cr ion-rich nitride layer after the etch processes.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1, the two Bite type fittingss of the present invention are by fittings body 1, preceding cutting ferrule 2, the sealing of the compact structure that back cutting ferrule 3 and nut 4 are formed and step up device, fittings body 1 and nut 4 are by being threaded, preceding cutting ferrule 2, back cutting ferrule 3 is installed on fittings body 1 successively, between the nut 4, preceding cutting ferrule 2 is a cone-shaped ring, preceding cutting ferrule 2 passes through cone match with fittings body 1, back cutting ferrule 3 is flanged (FLGD) annulus, the flange end of back cutting ferrule 3 cooperates with the nut internal surface, the preceding male cone (strobilus masculinus) 5 of back cutting ferrule 3 the other ends passes through cone match with the back inner conical surface of preceding cutting ferrule 26, and the back inner conical surface angle [alpha] of cutting ferrule 2 is 80 degree before the present embodiment.During use, at first pipe is inserted in the fittings body 1 and (must be inserted into the bottom to pipe always), nut 4 screws up with a wrench, nut 4 advances back cutting ferrule 3 to travel forward, cutting ferrule 2 forward before back cutting ferrule 3 promoted simultaneously, the internal taper hole of fittings body 1 is the preceding cutting ferrule 2 of extruding inwardly, cutting ferrule 2 is eliminated its internal diameter and the gap between the tube outer diameter before making, along with the inwardly motion forward of preceding cutting ferrule 2, its trailing edge is lifted by back cutting ferrule 3 and shifts to the position of fittings body 1 internal taper hole sealing, increase along with nut 4 thrusts, preceding cutting ferrule 2 is pressed into pipe makes pipe produce the support that bigger distortion becomes first order fit sealing, the increase of fittings body 1 internal taper hole and preceding cutting ferrule 2 area of contact simultaneously, bigger resistance force the front end of back cutting ferrule 3 to move inward, thereby form the support of second level fit sealing on pipe.When screwing up with a wrench nut 11/4 circle, nut has been finished sealing and fastening effect in the movement process of certain distance that advances.Like this, just formed the dual fail-safe high strength cylindrical sealing structure that double-sealing, two-restriction support admittedly.
As shown in Figure 2, embodiment is directintermination joint (an A type), and main body (fittings body) is straight-through unit, and the one end is metric system outside thread (diameter d), and the other end is pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).As shown in Figure 3, embodiment is directintermination joint (Type B), and main body is straight-through unit, and the one end is pipe outside thread (diameter d) or Taper Pipe outside thread (diameter d), and the other end is pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in Figure 4, embodiment is directintermination joint (a C type), and main body is straight-through unit, and the one end is metric system internal thread (diameter d), and the other end is pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in Figure 5, embodiment is directintermination joint (a D type), and main body is pipe internal thread (diameter d) or Taper Pipe internal thread (diameter d) for straight-through unit, one end, and the other end is pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in Figure 6, embodiment is right angle END CONNECTOR (an A type), and main body is the logical unit of quarter bend, and the one end is metric system outside thread (diameter d), and the other end is pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in Figure 7, embodiment is the logical unit of quarter bend for right angle END CONNECTOR (Type B) main body, and the one end is pipe outside thread (diameter d) or Taper Pipe outside thread (diameter d), and the other end is pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in Figure 8, embodiment is that right angle END CONNECTOR (C type) main body is the logical unit of quarter bend, and the one end is metric system internal thread (diameter d), and the other end is pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in Figure 9, embodiment is that right angle END CONNECTOR (D type) main body is the logical unit of quarter bend, and the one end is pipe internal thread (diameter d) or Taper Pipe internal thread (diameter d), and the other end is pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in figure 10, embodiment is straight-through unit for straight-through transition joint, main body, and its two end is same specification pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in figure 11, embodiment is straight-through unit for reducer fitting in the middle of straight-through, main body, and its two end is different size pipe arrangement (the diameter D of two cutting ferrule Connecting format
0, D
0').
As shown in figure 12, embodiment is the right angle transition joint, and main body is the logical unit of quarter bend, and its two end is same specification pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in figure 13, embodiment is reducer fitting in the middle of the right angle, and main body is the logical unit of quarter bend, and its two end is different size pipe arrangement (the diameter D of two cutting ferrule Connecting format
0, D
0').
As shown in figure 14, embodiment is the threeway transition joint, and main body is positive threeway unit, and its three end is same specification pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in figure 15, embodiment is the four-way transition joint, and main body is positive four-way unit, and its four end is same specification pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in figure 16, embodiment is straight-through unit for straight-through BULKHEAD UNION, main body, and threading is installed, and its two end is same specification pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in figure 17, embodiment is the pressure gauge straight coupling, and main body is straight-through unit, and the one end is exclusively used in manometric installation and connects internal thread (diameter d), and the other end is pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in figure 18, embodiment is a pipe plug, blocks terminal point pipe arrangement (the diameter D of pipe
0).
As shown in figure 19, embodiment is a valve body, and two ends of its connection are same specification pipe arrangement (the diameter D of two cutting ferrule Connecting format
0).
As shown in figure 20, rich Cr nitriding is handled the stainless steel pipe in back and is connected with back cutting ferrule photo, and its inner and outer surface all passes through polishing treatment, and the surface is silvery white in color.
As shown in figure 21, the end face pattern of Cr ion-rich nitride layer after etch processes, visible interior outside alloying layer thickness is continuous, even, and there is the corrosion resistant bright layer of one deck on the surface.
The present invention can adopt the brush silver plating process that the nut internal surface is carried out silver-plated processing; In addition, among the present invention Cr ion-rich nitride layer and preparation method thereof can referring to the Chinese invention patent application (application number: 200710012807.7, the applying date: on September 12nd, 2007).
Claims (5)
1. two Bite type fittingss that double-sealing, two-restriction support admittedly, have fittings body, cutting ferrule, nut, fittings body and nut are by being threaded, between fittings body, nut, be provided with cutting ferrule, it is characterized in that: cutting ferrule is two cutting ferrules that preceding cutting ferrule, back cutting ferrule are formed, preceding cutting ferrule, back cutting ferrule are installed between fittings body, the nut successively, preceding cutting ferrule is a cone-shaped ring, preceding cutting ferrule and fittings body pass through cone match, back cutting ferrule is flanged (FLGD) annulus, the flange end of back cutting ferrule cooperates with the nut internal surface, and the back cutting ferrule the other end and preceding cutting ferrule pass through cone match; There is rich Cr nitriding layer on the surface of back cutting ferrule, and the nut internal surface has silver plating layer.
2. two Bite type fittingss that double-sealing according to claim 1, two-restriction support admittedly is characterized in that: the back inner conical surface angle [alpha] of preceding cutting ferrule is the 76-85 degree.
3. two Bite type fittingss that double-sealing according to claim 1, two-restriction support admittedly is characterized in that: adopt the brush silver plating process that the nut internal surface is carried out silver-plated processing.
4. two Bite type fittingss that double-sealing according to claim 1, two-restriction support admittedly is characterized in that: the surface of back cutting ferrule adopts Cr ion-rich nitride to handle, and Cr content is 20-40wt% in the Cr ion-rich nitride layer, and nitrided layer hardness is at Hv
0.3The 400-800 scope is interior, alloying layer thickness is adjustable in 0.02-0.1 millimeter scope.
5. the using method of two Bite type fittingss that double-sealing according to claim 1, two-restriction support admittedly is characterized in that concrete steps are as follows:
(1) pipe is inserted in the fittings body, pipe is inserted into fittings body one bottom portion always;
(2) fastening nut, nut propelling back cutting ferrule travels forward, and while back cutting ferrule promotes preceding cutting ferrule forward, cutting ferrule before the internal taper hole of fittings body inwardly pushes, its internal diameter of cutting ferrule elimination and the gap between the tube outer diameter before making;
(3) along with the inwardly motion forward of preceding cutting ferrule, the trailing edge of preceding cutting ferrule is lifted by the back cutting ferrule and shifts to the position that the fittings body internal taper hole seals, and along with the increase of nut thrust, preceding cutting ferrule is pressed into pipe makes pipe produce the support that bigger distortion becomes first order fit sealing; The increase of fittings body internal taper hole and preceding cutting ferrule area of contact simultaneously, bigger resistance force the front end of back cutting ferrule to move inward, thereby form the support of second level fit sealing on pipe;
(4) when screwing up with a wrench nut 11/4 circle, nut has been finished sealing and fastening effect in the movement process that advances, so just formed the dual fail-safe high strength cylindrical sealing structure that double-sealing, two-restriction support admittedly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100122770A CN101625056B (en) | 2008-07-11 | 2008-07-11 | Double-ferrule type pipe joint of double-sealing and double-fastening support and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100122770A CN101625056B (en) | 2008-07-11 | 2008-07-11 | Double-ferrule type pipe joint of double-sealing and double-fastening support and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101625056A true CN101625056A (en) | 2010-01-13 |
| CN101625056B CN101625056B (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100122770A Expired - Fee Related CN101625056B (en) | 2008-07-11 | 2008-07-11 | Double-ferrule type pipe joint of double-sealing and double-fastening support and using method thereof |
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| CN (1) | CN101625056B (en) |
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| CN105715884A (en) * | 2016-03-09 | 2016-06-29 | 张素平 | Air inlet pipe connector of experimental type vacuum coating equipment |
| CN107350744A (en) * | 2017-07-25 | 2017-11-17 | 江苏星河阀门有限公司 | A kind of production technology of Double-ferrule type pipe joint for nuclear power generating sets |
| CN110057460A (en) * | 2018-01-17 | 2019-07-26 | 国核华清（北京）核电技术研发中心有限公司 | Multipoint thermocouple mounting assembly and multipoint thermocouple measuring device |
| CN110500455A (en) * | 2018-05-16 | 2019-11-26 | 深圳市飞托克实业有限公司 | Double card covers connection component |
| CN111971232A (en) * | 2018-04-12 | 2020-11-20 | 普罗特克纳有限公司 | Fixing device for an extraction device |
| CN115111429A (en) * | 2022-06-15 | 2022-09-27 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Installation process method of water-cooled complex pipeline |
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|---|---|---|---|---|
| CN2154942Y (en) * | 1993-05-14 | 1994-02-02 | 颜扬标 | Double-clamping sleeve blow-out patch |
| CN2200744Y (en) * | 1994-08-08 | 1995-06-14 | 陈小祥 | Tube coupling piece |
| CN2365495Y (en) * | 1998-10-27 | 2000-02-23 | 王华胜 | Cutting sleeve type pipe coupling sealed with rubber sealing ring |
| EP1536175A3 (en) * | 1999-09-13 | 2005-10-19 | Swagelok Company | Tube fitting with indicating means |
| CN100406615C (en) * | 2005-03-15 | 2008-07-30 | 中国科学院金属研究所 | Ni-CrN hard composite coating, its prepn. process and application |
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2008
- 2008-07-11 CN CN2008100122770A patent/CN101625056B/en not_active Expired - Fee Related
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| CN105715884A (en) * | 2016-03-09 | 2016-06-29 | 张素平 | Air inlet pipe connector of experimental type vacuum coating equipment |
| CN107350744A (en) * | 2017-07-25 | 2017-11-17 | 江苏星河阀门有限公司 | A kind of production technology of Double-ferrule type pipe joint for nuclear power generating sets |
| CN110057460A (en) * | 2018-01-17 | 2019-07-26 | 国核华清（北京）核电技术研发中心有限公司 | Multipoint thermocouple mounting assembly and multipoint thermocouple measuring device |
| CN111971232A (en) * | 2018-04-12 | 2020-11-20 | 普罗特克纳有限公司 | Fixing device for an extraction device |
| CN110500455A (en) * | 2018-05-16 | 2019-11-26 | 深圳市飞托克实业有限公司 | Double card covers connection component |
| CN110500455B (en) * | 2018-05-16 | 2021-11-09 | 深圳市飞托克实业有限公司 | Double-clamping sleeve connecting assembly |
| CN115111429A (en) * | 2022-06-15 | 2022-09-27 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Installation process method of water-cooled complex pipeline |
| CN115111429B (en) * | 2022-06-15 | 2024-04-16 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Mounting process method of water-cooling complex pipeline |
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| CN101625056B (en) | 2011-07-20 |
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