CN105485446A - Pressure lubrication system and welded type tube joint device thereof - Google Patents
Pressure lubrication system and welded type tube joint device thereof Download PDFInfo
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- CN105485446A CN105485446A CN201410483699.1A CN201410483699A CN105485446A CN 105485446 A CN105485446 A CN 105485446A CN 201410483699 A CN201410483699 A CN 201410483699A CN 105485446 A CN105485446 A CN 105485446A
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Abstract
The invention discloses a welded type tube joint device. The welded type tube joint device comprises a connecting tube, a joint body and a hard tube. The first end of the connecting tube is connected with the joint body. The second end of the connecting tube and the first end of the hard tube can move relatively and are in nested connection with each other so that the connecting tube and the hard tube can move in a telescopic mode. The length of the hard tube is indirectly adjusted in the moving process, and the accuracy of the relative length of the hard tube can be still guaranteed during connection even if the cutting size of the hard pipe is not accurate, so that the cutting time of the hard tube is shortened, and the cutting efficiency of the hard tube is improved. The invention further discloses a pressure lubrication system which comprises the welded type tube joint device. The cutting efficiency of the hard tube of the pressure lubrication system can be effectively improved, and meanwhile the regularity of a tube array in the pressure lubrication system is achieved.
Description
Technical field
The present invention relates to technical field of engineering machinery, a kind of Welded fitting device of special design.In addition, the invention still further relates to a kind of force-feed lubrication system comprising above-mentioned Welded fitting device.
Background technique
In modern mechanical transmission, the normal force-feed lubrication system that adopts provides necessary lubricating condition, to ensure the normal operation of driving mechanism for driving mechanism.
Hard tube and pipe joint, as auxiliary element important in force-feed lubrication system, for connecting the fluid passage of whole system, are the link general names of energy dismounting in fluid passage.According to the Placement of hard tube and pipe joint, the classification of pipe joint has a variety of, and wherein Welded fitting is connected firmly because of it, seals reliable, obtains comparatively general use.
Welded fitting is primarily of compositions such as fittings body, adapter, nut and seal rings.Usual nut sleeve is contained in adapter, couples together with nut one end by fittings body and adapter, and the other end of adapter is then connected with welding manner with hard tube end, the other end of fittings body can with another hard tube or equipment connection.Hydraulic equipment and hard tube or hard tube and hard tube just connect by such pipe joint, form the seal structure that hydraulic oil flows wherein.
The structure of Welded fitting in prior art and Placement are as shown in Figure 1, nut 03 is by the left end compact siro spinning technology of the right-hand member of fittings body 04 with adapter 02, adapter 02 and hard tube 01 have identical axle external diameter, right-hand member and the hard tube 01 of adapter 02 have employed the Type of Welding of typical end face to end face and are connected, and soldering point is selected in the end face outer rim of the two joint.In conventional welding technique, in order to ensure welding quality, reduce welding deformation, also need the edge of weldment end face to be processed into groove, carry out groove butt welding.The end face of hard tube 01 and the end face of adapter 02 are similarly the bevel shape of chamfering form, and both ends of the surface are welded at groove place after fitting completely.
When using this kind of method, if the length intercepting hard tube before welding is inaccurate, a lot of impact can be produced.The long meeting of hard tube causes the crooked of hard tube position, interferes with other hydraulic equipments, has an impact to overall structure; Hard tube is too short, and the other end of hard tube can be caused cannot to be connected to follow-up hydraulic equipment, causing difficulty, so before welding, needing the length accurately determining hard tube for connecting.
But in a practical situation, the length of hard tube needs to determine according to the spatial position of connected hydraulic equipment.During on-site measurement, use tape measure and ruler to measure, these means can only determine approximate dimensions, are difficult to very accurate.Generally for and intercept precisely, need the cutting to hard tube carries out repeatedly to polish.Simultaneously owing to adopting end face to the groove welding of end face, the end face to hard tube is connected with adapter is also needed to carry out retaining wall on slope before welding.Above reason causes the blanking process of hard tube too complicated, and the time of at substantial.
Therefore, how effectively to improve hard tube blanking efficiency, be the current technical issues that need to address of those skilled in the art.
Summary of the invention
The object of this invention is to provide a kind of Welded fitting device, this device can significantly improve hard tube blanking efficiency.Another object of the present invention is to provide a kind of force-feed lubrication system comprising above-mentioned Welded fitting device.
For achieving the above object, the invention provides following technological scheme:
A kind of Welded fitting device, comprise adapter, fittings body and hard tube, the first end of described adapter is connected with described fittings body, and wherein, the second end of described adapter and the first end of hard tube are relatively-movable nested encryptions.
Preferably, the outer wall of described adapter is annular table terrace, and the second end port outside diameter of described adapter is less than the external diameter at the close fittings body place of described adapter, and the second end of described adapter is nested in inside the first end of described hard tube.
Preferably, the inwall of described hard tube is annular table terrace, and the first end port inner diameter of described hard tube is greater than the internal diameter away from first end place of described hard tube, and the second end of described adapter is nested in inside the first end of described hard tube.
Preferably, the inwall of described adapter is annular table terrace, and the second end port inner diameter of described adapter is greater than the internal diameter at the close fittings body place of described adapter, and the second end of described adapter is enclosed within outside the first end of described hard tube.
Preferably, the outer wall of described hard tube is annular table terrace, and the first end port outside diameter of described hard tube is less than the external diameter away from first end place of described hard tube, and the second end of described adapter is enclosed within outside the first end of described hard tube.
Preferably, the second end of described adapter and the first end of hard tube are Spielpassung.
Preferably, the second end of described adapter is connected with thread connecting mode with the first end of described hard tube.
Preferably, the port of described adapter and the port of described hard tube all adopt chamfering form.
A kind of force-feed lubrication system, comprise Welded fitting device, wherein, described Welded fitting device is the Welded fitting device as described in above-mentioned any one.
Preferably, described force-feed lubrication system is speed reducer force-feed lubrication system.
By nested inside and outside adapter in prior art and the position relationship of hard tube to be changed into end face by end face, thus the first end that the second end of adapter can be stretched into hard tube is inner, or the second end first end of hard tube being stretched into adapter is inner, the Telescopic moving of both realizations.This moving process, changes adapter and the entire length of hard tube, can be regarded as the length indirectly changing hard tube, and when the two shrinks, the distance of movement can be regarded as and indirectly hard tube reduced corresponding length.So hard tube length can suitably exceed actual demand length when using this method blanking, and the maximum value that exceeds allowed is exactly hard tube relatively-movable ultimate range when being socketed with adapter.Even if such an approach achieves hard tube blank size inaccuracy, but still the accurate connection of hard tube can be ensured, thus shorten the time of hard tube blanking, improve efficiency and the degree of accuracy of hard tube blanking.
Present invention also offers a kind of force-feed lubrication system, comprise above-mentioned Welded fitting device.Owing to have employed above-mentioned Welded fitting device, described force-feed lubrication system achieves hard tube at blanking and connection procedure rapidly and efficiently, ensure that when hard tube blanking in the coarse situation of length, still can ensure hard tube and take over the accuracy be connected; And and then achieve the regularity of the inner comb of force-feed lubrication system.
Accompanying drawing explanation
Fig. 1 is Welded fitting design proposal schematic diagram in prior art;
Fig. 2 is the structural representation of specific embodiment one provided by the present invention;
Fig. 3 is the structural representation of specific embodiment two provided by the present invention;
Fig. 4 is the structural representation of specific embodiment three provided by the present invention;
Fig. 5 is the structural representation of specific embodiment four provided by the present invention;
Fig. 6 is the structural representation of specific embodiment five provided by the present invention.
Embodiment
Core of the present invention is to provide a kind of Welded fitting device, and this device can significantly improve hard tube blanking efficiency.Another core of the present invention is to provide a kind of force-feed lubrication system comprising above-mentioned Welded fitting device.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 2, Fig. 2 is the structural representation of a kind of embodiment of Welded fitting device provided by the present invention.
Specifically implement in mode of execution at the first, Welded fitting device provided by the present invention is arranged in force-feed lubrication system, connects each function device of lubrication system, as relief valve, accumulator etc., for the formation of the fluid passage of complete hydraulic oil.
As shown in Figure 2, Welded fitting device provided by the present invention comprises hard tube 1, adapter 2 and fittings body 4, and hard tube 1 is the logical straight tube that internal diameter and external diameter all remain unchanged, and adapter 2 is also the logical straight tube that internal diameter and external diameter remain unchanged.
In Placement, nut 3 is sleeved on outside adapter 2, and by the first end of nut 3 by adapter 2, the left end namely shown in Fig. 2, together with one end compact siro spinning technology of fittings body 4; The other end of fittings body 4 can be taken over other, hard tube or equipment are connected; Second end of adapter 2, the right-hand member namely shown in Fig. 2, is enclosed within the outside of one end of hard tube 1, the inwall of adapter 2 and the outer wall Spielpassung of hard tube 1.
The connecting means of this Welded fitting device comprises the following steps.First measure the needed length between two elements or equipment that hard tube 1 connects, element alleged here or equipment are the hydraulic equipment in above-mentioned force-feed lubrication system.After intercepting the hard tube 1 of this length, one end of this hard tube 1 is embedded the second end of adapter 2, then hard tube 1 is carried out telescopic moving in adapter 2, the relative position of adjustment hard tube 1 and adapter 2, if hard tube 1 is longer than required length after embedding, then appropriate hard tube 1 to be stretched into adapter 2 inside, until meet the position needs connected, then stop stretching into; If hard tube 1 length is less than required length, then appropriate hard tube 1 to be moved, to increase entire length outside the outside of adapter 2, but the first end of hard tube 1 still needs to remain in adapter 2, the second end of adapter 2 can not be shifted out, until meet the position needs connected, then stop outer moving.The two length can carrying out indentation is exactly the length indirectly changing hard tube.
In present embodiment, one end of adapter 2 is adopted to be enclosed within the outside of hard tube 1 one end, hard tube 1 is allowed to stretch in adapter 2, in order to reach the object changing entire length, one end of adapter 2 can be embedded the inner side of one end of hard tube 1 equally, the outside allowing hard tube 1 be enclosed within adapter 2 is moved, and can serve the same role.
It is coaxality in order to improve two pipes that Spielpassung is carried out in hard tube 1 and adapter 2, is beneficial to follow-up welding step.After having connected, butt tube 2 and hard tube 1 is needed to weld, so need to be fixed two pipe relative positions before welding.If adapter 2 inner diameter differs comparatively large with hard tube 1 outer diameter, easily produce the crooked of position, be not easy to welding.When hard tube is selected materials, select the Spielpassung of the unit bore system determined according to the internal diameter of adapter 2, this kind of fit system had both met moveable nest relation, increased again the coaxality of two pipes.Optionally, the two may not be Spielpassung, also can be aperture more be greater than the diameter of axle, as long as meet can relative movement.
In order to achieve the above object, also adapter 2 can be threaded with hard tube 1.Stamp internal thread at adapter 2 inwall, stamp corresponding outside thread at hard tube 1 outer wall, make the two coordinate accordingly, above-mentioned nested procedure then needs, by turn-knob operation, hard tube 1 is rotated into adapter 2 inside.It is crooked that this kind of method not only avoids when not carrying out move operation in radial direction, and ensure that the fixing of axial position simultaneously.
In present embodiment, optionally, the external diameter of the internal diameter of adapter 2 port and hard tube 1 port can be carried out chamfer machining, make both be easy to assembling, and it be concentrated to reduce stress.
In present embodiment, the inwall of hard tube 1 and the outer wall of adapter 2 can not be straight tube shape faces, and other shape and structures also go in this embodiment.The axial cross section shape of hard tube 1 and adapter 2 is also not only confined to circle in addition, needed for reality, can expand to shapes such as ellipse, rectangles.
Use above-mentioned Welded fitting device, by the relative movement of hard tube 1 with adapter 2, change the entire length of hard tube 1 and adapter 2, indirectly change the length of hard tube 1, thus adapt to ground above-mentioned two elements of connection or equipment.Do not need the chip to hard tube 1 carries out repeatedly to polish, also can reach the object accurately connected, the linkage structure of this kind of method use is simple, saves the time of hard tube 1 of polishing, improves the efficiency of hard tube 1 feeding.
On the basis of above-described embodiment, the change of shape and structure can be carried out by butt tube 2.
Please reference drawing 3, Fig. 3 be specifically the structural representation of Welded fitting device specific embodiment two provided by the present invention.
In Welded fitting device in the present embodiment, the outer wall of adapter 2 is designed to the form with annular table terrace, namely from the left end of adapter 2 to right-hand member transient process, at this step surface place, the external diameter of adapter 2 has and significantly reduces, second end port outside diameter of adapter 2, the external diameter of the port namely on the right side of adapter 2 shown in Fig. 3, is less than relatively near the external diameter of other parts of the adapter 2 of fittings body 4.The internal diameter of hard tube 1 is greater than the external diameter of the second port of adapter 2.
In annexation, nut 3 is by fittings body 4 and adapter 2 compact siro spinning technology, and the second end of adapter 2 is nested in the inner side of described hard tube 1 one end.
The connecting means of this Welded fitting device comprises the following steps.The method identical with embodiment one intercepts the hard tube 1 of Len req, one end of this hard tube 1 is enclosed within the outside of the second end of adapter 2, then adapter 2 is carried out telescopic moving in hard tube 1, the relative position of adjustment hard tube 1 and adapter 2.With embodiment one unlike, hard tube 1 moves to the left to certain position, the end face of hard tube 1 can contact with the annular table terrace of adapter 2, now, hard tube 1 also just reaches maximum indentation place, the distance of its indentation is the length that hard tube 1 changes indirectly, so the length change maximum flow of hard tube 1 equals the annular table terrace of adapter 2 and the distance of adapter 2 second end end face.
Also for ease of the coaxality of raising two pipes, avoid welding crooked, when hard tube 1 is selected materials, the Spielpassung of unit shaft system can be carried out according to the external diameter of adapter 2.
In order to achieve the above object, also adapter 2 can be threaded with hard tube 1.Stamp internal thread at adapter 2 outer wall, stamp corresponding outside thread at hard tube 1 inwall, make the two coordinate accordingly.
In present embodiment, optionally, the internal diameter of the external diameter of adapter 2 port and hard tube 1 port can be carried out chamfer machining, make both be easy to assembling, and it be concentrated to reduce stress.
In present embodiment, the shape of the outer wall of hard tube 1 and the inwall of adapter 2 is not limited to cylindrical shape, can have the shapes such as step surface; The axial cross section shape of hard tube 1 and adapter 2 is also not only confined to circle in addition.
Above-mentioned mode of execution saves the time of polishing hard tube 1, improves the efficiency of hard tube 1 feeding.Special, due to the existence of its annular table terrace, can limit the position of hard tube 1, ensure in follow-up welding process, hard tube 1 can not weld together with nut 3, ensures the detachability of nut 4 and adapter 2.
Similarly with it by the design of the step surface of adapter 2 in the inner side of adapter 2, can to connect for the hard tube 1 selecting diameter less.
Please refer to Fig. 4, Fig. 4 is the structural representation of Welded fitting device specific embodiment three provided by the present invention.
In Welded fitting device in the present embodiment, the inwall of adapter 2 is designed to the form with annular table terrace, namely from the left end of adapter 2 to right-hand member transient process, at this step surface place, the internal diameter of adapter 2 has obvious increasing, second end port inner diameter of adapter 2, the internal diameter of the port namely on the right side of adapter 2 shown in Fig. 4, is greater than relatively near the external diameter of other parts of the adapter 2 of fittings body 4.
In annexation, the second end of adapter 2 is nested in the outside of described hard tube 1 one end.Special, the internal diameter of the external diameter of hard tube 1 and the second port of adapter 2 has the screw thread matched.
The connecting means of this Welded fitting device comprises the following steps.First the hard tube 1 of Len req is intercepted, then by the matching thread of one end of hard tube 1 according to hard tube 1 and adapter 2, be socketed in the outside of adapter 2 in rotary manner, manage relative turn-knob by two, entire length is lengthened or reduces, in order to adjust hard tube 1 to the link position be applicable to.The present embodiment just changes in adapter 2 and hard tube 1 nested position, thus soldering point also there occurs corresponding change, in embodiment two, although soldering point can not overlap with nut 3, nut 3 and hard tube 1 can not be fixed, but the location comparison of soldering point is narrow and small, is unfavorable for welding; And the welding position of the present embodiment is in the port of adapter 2, be more conducive to welding operation.
In above-mentioned mode of execution, optionally the Placement of two pipes is adopted screw-thread fit, the Spielpassung in axle and hole can certainly be selected, or other nested encryptions modes, as long as can meet relatively-movable nested, all can be used as the application scheme of this embodiment.
In above-mentioned Welded fitting device, optionally, the external diameter of the internal diameter of adapter 2 port and hard tube 1 port can be carried out chamfer machining, make both be easy to assembling, and it be concentrated to reduce stress.
In above-mentioned mode of execution, the shape of tubing is not only confined to circle, needed for reality, can expand to shapes such as ellipse, rectangles.
Described embodiment saves the time of polishing hard tube 1, improves the efficiency of hard tube 1 feeding.Special, due to the existence of its annular table terrace, can limit the position of hard tube 1, ensure to weld together with nut 3 at hard tube 1, and compared to embodiment two, the position of its soldering point will be openr, be conducive to the operation of welding.
Carry out expansion by above-mentioned three kinds of mode of executions to extend, in the improving one's methods of Welded fitting, be not only the change of butt tube shape, can change the shape of hard tube equally.
Please refer to Fig. 5, Fig. 5 is the structural representation of the specific embodiment of the invention four.
In Welded fitting device in the present embodiment, hard tube 1 becomes the ladder pipe with ladder surface, and the port diameter of hard tube 1 is greater than the port outside diameter of adapter 2.By nut 3 by adapter 2 and fittings body 4 compact siro spinning technology, the port of hard tube 1 is enclosed within outside the second end port of adapter 2.Identical with above-described embodiment, adapter 2 and hard tube 1 carry out relative movement, to adjust overall length.
Please refer to Fig. 6, Fig. 6 is the structural representation of the specific embodiment of the invention five.Nest relation in above-mentioned mode of execution is also to exchanging, and the relevant adjustment preferred embodiment also thereupon carrying out correspondence, method is with the change of embodiment two with embodiment three.In the present embodiment, the port of hard tube 1 is enclosed within inside the second end port of adapter 2.
Use above-mentioned Welded fitting device, identical with previous embodiment, do not need repeatedly to polish to hard tube 1, can by the relative movement of hard tube 1 with adapter 2, the length that both changes are overall, thus the connection carrying out equipment adapted to.
Above embodiment is the change of geomery that one of them carries out inwall, outer wall by hard tube 1 or adapter 2, thus make hard tube 1 and adapter 2 change position relationship nested inside and outside two pipes into from the position relationship of end face to end face, make two pipes carry out axial relative movement.Wherein do not limit the concrete shape of another pipe, the structure of straight-through tube can be remained, under the nest relation prerequisite ensureing relative movement, certain change can be carried out yet.Even further, hard tube 1 and adapter 2 can being set as the ladder tubular structure with ladder surface simultaneously, when connecting, two pipes being carried out inside and outside nested.Other parts of which are identical with above-described embodiment content; reach the beneficial effect of above-described embodiment; namely by changing the position relationship of hard tube 1 and adapter 2 into relatively-movable inside and outside nest relation by end face to end face; thus achieve the change of entire length; hard tube 1 is made to be easier to adapt to link position relation; save the time of hard tube 1 blanking, and utilize ladder to ensure that the restriction of axial position, protection link is not easily damaged.
Except above-mentioned Welded fitting device, the present invention also provides a kind of force-feed lubrication system comprising Welded fitting device disclosed in above-described embodiment, and the structure of these other each several parts of force-feed lubrication system please refer to prior art, repeats no more herein.
Need it is to be noted that Welded fitting is not only limited to for force-feed lubrication system, can expand to a lot, system and equipment of needing carrying fluid relevant to fluid; In addition, the medium that Welded fitting can be suitable for has non-aggressive medium or the aggressive mediums such as Oil, Water, Gas body, so its purposes is also not limited to loading and the transmission of oil, can be applicable to equally in the relevant devices of above medium.
Particularly, above-mentioned force-feed lubrication system can be speed reducer force-feed lubrication system.
Above force-feed lubrication system provided by the present invention and Welded fitting device thereof are described in detail.Apply specific case herein to set forth principle of the present invention and mode of execution, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a Welded fitting device, comprise adapter (2), fittings body (4) and hard tube (1), the first end of described adapter (2) is connected with described fittings body (4), it is characterized in that, the second end of described adapter (2) and the first end of hard tube (1) are relatively-movable nested encryptions.
2. device according to claim 1, it is characterized in that, the outer wall of described adapter (2) is annular table terrace, second end port outside diameter of described adapter (2) is less than the external diameter at the close fittings body place of described adapter (2), and the second end of described adapter (2) is nested in inside the first end of described hard tube (1).
3. device according to claim 1 and 2, it is characterized in that, the inwall of described hard tube (1) is annular table terrace, the first end port inner diameter of described hard tube (1) is greater than the internal diameter away from first end place of described hard tube (1), and the second end of described adapter (2) is nested in inside the first end of described hard tube (1).
4. device according to claim 1, it is characterized in that, the inwall of described adapter (2) is annular table terrace, second end port inner diameter of described adapter (2) is greater than the internal diameter at the close fittings body place of described adapter (2), and the second end of described adapter (2) is enclosed within outside the first end of described hard tube (1).
5. the device according to claim 1 or 4, it is characterized in that, the outer wall of described hard tube (1) is annular table terrace, the first end port outside diameter of described hard tube (1) is less than the external diameter away from first end place of described hard tube (1), and the second end of described adapter (2) is enclosed within outside the first end of described hard tube (1).
6. device according to claim 1, is characterized in that, the second end of described adapter (2) and the first end of hard tube (1) are Spielpassung.
7. device according to claim 1, is characterized in that, the second end of described adapter (2) is connected with thread connecting mode with the first end of described hard tube (1).
8. device according to claim 1, is characterized in that, the port of described adapter (2) and the port of described hard tube (1) all adopt chamfering form.
9. a force-feed lubrication system, comprises Welded fitting device, it is characterized in that, described Welded fitting device is the Welded fitting device as described in any one of claim 1 to 8.
10. system according to claim 9, is characterized in that, described force-feed lubrication system is speed reducer force-feed lubrication system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410483699.1A CN105485446A (en) | 2014-09-19 | 2014-09-19 | Pressure lubrication system and welded type tube joint device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410483699.1A CN105485446A (en) | 2014-09-19 | 2014-09-19 | Pressure lubrication system and welded type tube joint device thereof |
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| CN105485446A true CN105485446A (en) | 2016-04-13 |
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| CN201410483699.1A Pending CN105485446A (en) | 2014-09-19 | 2014-09-19 | Pressure lubrication system and welded type tube joint device thereof |
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|---|---|---|---|---|
| JPH1047557A (en) * | 1996-07-31 | 1998-02-20 | Ishikawajima Harima Heavy Ind Co Ltd | Clearance setting method and member for welded pipe joint |
| JPH10306889A (en) * | 1997-05-02 | 1998-11-17 | Nok Corp | Piping coupling |
| CN1451506A (en) * | 2003-04-17 | 2003-10-29 | 西北工业大学 | Method for connecting different material metal pipe joints |
| EP1811220A2 (en) * | 2006-01-18 | 2007-07-25 | Liebert Hiross S.p.A. | Method for joining tubular elements made of stainless steel, an alloy thereof, aluminum or other equivalent metallic materials |
| CN202691337U (en) * | 2012-08-04 | 2013-01-23 | 宁波华元机械科技有限公司 | Buckle-pressing type combination rubber pipe |
| CN202992436U (en) * | 2012-12-09 | 2013-06-12 | 浙江盾安热工科技有限公司 | Copper and aluminum joint structure of heat exchanger |
| CN204127512U (en) * | 2014-09-19 | 2015-01-28 | 沃德(天津)传动有限公司 | Force-feed lubrication system and Welded fitting device thereof |
-
2014
- 2014-09-19 CN CN201410483699.1A patent/CN105485446A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1047557A (en) * | 1996-07-31 | 1998-02-20 | Ishikawajima Harima Heavy Ind Co Ltd | Clearance setting method and member for welded pipe joint |
| JPH10306889A (en) * | 1997-05-02 | 1998-11-17 | Nok Corp | Piping coupling |
| CN1451506A (en) * | 2003-04-17 | 2003-10-29 | 西北工业大学 | Method for connecting different material metal pipe joints |
| EP1811220A2 (en) * | 2006-01-18 | 2007-07-25 | Liebert Hiross S.p.A. | Method for joining tubular elements made of stainless steel, an alloy thereof, aluminum or other equivalent metallic materials |
| CN202691337U (en) * | 2012-08-04 | 2013-01-23 | 宁波华元机械科技有限公司 | Buckle-pressing type combination rubber pipe |
| CN202992436U (en) * | 2012-12-09 | 2013-06-12 | 浙江盾安热工科技有限公司 | Copper and aluminum joint structure of heat exchanger |
| CN204127512U (en) * | 2014-09-19 | 2015-01-28 | 沃德(天津)传动有限公司 | Force-feed lubrication system and Welded fitting device thereof |
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Application publication date: 20160413 |