CN103216687B - Dual tube and connecting structure thereof - Google Patents
Dual tube and connecting structure thereof Download PDFInfo
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- CN103216687B CN103216687B CN201210017271.9A CN201210017271A CN103216687B CN 103216687 B CN103216687 B CN 103216687B CN 201210017271 A CN201210017271 A CN 201210017271A CN 103216687 B CN103216687 B CN 103216687B
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- outer tube
- pipe
- interior pipe
- sidewall
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Abstract
The invention provides a dual tube and a connecting structure thereof. When a common part of an outer tube and an inner tube undergoes stamping perforation processing for connecting the inner tube, defective conditions caused by stamping of waste materials are avoided. An inner tube (12) is arranged inside an outer tube (11); parts of the outer tube (11) and the inner tube (12) are unified into a whole; the inner tube (12) is provided with side walls (121) extending oppositely in parallel from a common part (13) of the outer tube (11) and the inner tube (12) with the diameter direction of the outer tube (11) between the side walls; and the depth end of the side wall (121) and opposite depth walls (122) of the common part (12) of the outer tube (11) and the inner tube (12) are not expanded to a degree exceeding the space between the side walls (121).
Description
Technical field
The invention belongs to relate to pipe in portion's arranging within the outer tube and circulate respectively in outer tube and interior pipe and have the dual pipe of the fluid such as liquid, gas and the technical field of its linkage structure.
Background technique
Recently, in order to make the circulation path compactness of fluid, popularize dual pipe at large-scale industrial field, various improvement has been attempted to the relative configurations of outer tube and interior pipe.
In the prior art, as dual pipe, such as, there will be a known the formation described in patent documentation 1.
In patent documentation 1, describe and bending is carried out to sheet metal and dual pipe outer tube and interior pipe formed as one.
In the dual pipe of patent documentation 1, a part for outer tube and interior pipe is changed jointly, decreases manufactured materials amount, and manufacture cost reduces.In addition, by carrying out perforation processing to the common ground of outer tube and interior pipe, direction that internally Guan Xiangyu axle direction is orthogonal the connection of direct branch can be carried out.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 48-57715 publication
Summary of the invention
The problem that invention will solve
In the dual pipe of patent documentation 1, in order to the branch carrying out interior pipe connects, carry out perforation at the common ground utilizing the impact style that do not produce chip to outer tube and interior pipe and add man-hour, there is following problem: when interior pipe is little, because stampings conflicts with interior pipe, therefore interior pipe sustains damage because of stampings or stampings crimping is fixed on interior pipe and can not removes; When interior pipe is large, because stampings is hidden in the corner of internal tube, therefore the removal of stampings becomes trouble.And then, in order to carry out branch's connection, in inaccessible near the hole offered during the port of pipe, there is following problem: the hole offered and by the port of pipe in obturation between form useless space, can be there is retention or interference in fluid, so can damage fluid circulation.
The present invention considers these problems and makes, and the punching type perforation that the first problem is to provide carrying out being connected for the branch of interior pipe to outer tube and the common ground of interior pipe adds the dual pipe not producing the undesirable condition caused because of stampings man-hour.In addition, the second problem is to provide and does not damage fluid circulation just easily can be carried out the dual pipe of branch's connection by pipe in the dual pipe jointly changed linkage structure to the part of outer tube and interior pipe.
Solve the means of problem
In order to solve the first above-mentioned problem, dual pipe of the present invention adopts following means, it is characterized in that, this dual pipe is pipe in the inside of outer tube arranges, a part for outer tube and interior pipe is formed as one by jointly changing, in this dual pipe, interior pipe has sidewall, this sidewall from the common ground of outer tube and interior pipe across outer tube diametric(al) abreast in opposite directions and extend, do not expanded to the degree at the interval exceeding sidewall at the depth end of sidewall and the facing depth wall of the common ground of outer tube and interior pipe.
In these means, by interior pipe, there is the sidewall that the diametric(al) across outer tube extends abreast, with sidewall, the punching type perforation processing being carried out action by the diametric(al) at outer tube to be produced and bulged-in stampings guides to depth direction swimmingly from the common ground of outer tube and interior pipe, thus can avoid conflict, do not expanded to the degree at the interval exceeding sidewall by the depth wall of interior pipe, directed stampings can be prevented to be hidden in the corner of internal tube.
In addition, about these means, the section shape of the depth wall of interior pipe is formed as the semicircle protruded laterally, the standby resistance to pressure relative to the fluid at internal circulation of interior pipe can be made.In addition, the outer side surface of the sidewall of interior pipe and the boundary portion of outer tube are formed as curved surface, close gap can not be formed in the boundary portion of the sidewall of interior pipe and outer tube.
In order to solve the second above-mentioned problem, the linkage structure of dual pipe of the present invention adopts following means, it is characterized in that, the joint structure of this dual pipe connects dual pipe, this dual pipe is pipe in the inside of outer tube arranges, a part for outer tube and interior pipe is formed as one by jointly changing, interior pipe has sidewall, this sidewall from the common ground of outer tube and interior pipe across outer tube diametric(al) abreast in opposite directions and extend, the degree at the interval exceeding sidewall is not expanded at the depth end of sidewall and the facing depth wall of the common ground of outer tube and interior pipe, wherein, offer with the common ground of interior pipe the hole be connected at outer tube, hole becomes and has in a part incomplete that non-cut-off portion divides and offer hole, the cut off machine defining hole extends in the mode that the inside of the inside pipe of common ground from outer tube and interior pipe is outstanding.
In these means, give prominence to from the inside of the inside pipe of common ground of outer tube and interior pipe by making the cut off machine defining the hole that branch connects at interior pipe, cut off machine blocking is formed at by the hole offered and by the space between the port of obturation, plays function as the delay of anti-fluid, the current plate of interference.In addition, tunnel-type is formed as by sidewall and depth wall by interior pipe, when the hole connected has been offered in processing of being bored a hole by punching type, cut off machine is guided swimmingly by sidewall and to avoid to depth direction and the conflicting of each portion of interior pipe, and is not avoided by the depth wall more expanded form useless gap by comparing sidewall.
In addition, about these means, cut off machine is tilted with the fluid of the acutangulate mode of the axis shape inside pipe relative to hole circulation upstream side, the smooth fluid circulated can be guided in the hole connected in interior pipe.In addition, abut by the sidewall and depth wall making cut off machine and interior pipe and implement soldering, substantially fully can block space by cut off machine.
The effect of invention
Dual pipe of the present invention, by interior pipe, there is the sidewall that the diametric(al) across outer tube extends abreast, by sidewall, the processing of boring a hole of the punching type by carrying out action in the diametric(al) of outer tube to be produced and bulged-in stampings guides swimmingly to depth direction from the common ground of outer tube and interior pipe, thus can avoid conflict, the degree at the interval exceeding sidewall is not expanded to by the depth wall of interior pipe, directed stampings can be prevented to be hidden in the corner of internal tube, so add man-hour in the punching type perforation carrying out being connected for the branch of interior pipe to outer tube and the common ground of interior pipe, there is the effect that can not produce the undesirable condition caused because of stampings.
The linkage structure of dual pipe of the present invention, the connection of pipe in the dual pipe linkage structure of the dual pipe of patent documentation 1 being applicable to patent documentation 2, give prominence to from the inside of the inside pipe of common ground of outer tube and interior pipe by making the cut off machine defining the hole connected at interior pipe, cut off machine blocking is formed at by the hole offered with by the space between the port of obturation, as the delay of anti-fluid, the current plate of interference plays function, so have the circulation not damaging fluid just easily can be carried out branch's connection by pipe in the dual pipe jointly changed effect to the part of outer tube and interior pipe.In addition, tunnel-type is formed as by sidewall and depth wall by interior pipe, when the hole connected has been offered in processing of being bored a hole by punching type, because cut off machine is guided swimmingly by sidewall and to avoid to depth direction and the conflicting of each portion of interior pipe, do not avoided by the depth wall more expanded form useless gap by comparing sidewall, so have carry out in punching type perforation processing can the effect of the inside inner inclination ground configuration cuts sheet of pipe exactly.
Accompanying drawing explanation
Fig. 1 is the plan view (comprising partial enlarged drawing) of the first case of mode of execution for implementing dual pipe of the present invention.
Fig. 2 is the stereogram of the Production Example representing Fig. 1.
Fig. 3 is the sectional view of the perforation processing instances of Fig. 1, and (A) represents preperforative state, and (B) represents the state in perforation procedure.
Fig. 4 is the sectional view of the perforation finishing stage of the perforation processing instances of Fig. 1.
Fig. 5 is the plan view of the second case of mode of execution for implementing dual pipe of the present invention.
Fig. 6 is the longitudinal section of the mode of execution of linkage structure for implementing dual pipe of the present invention.
Fig. 7 is the X-X line sectional view of Fig. 1.
Fig. 8 is the stereogram of the perforation processing instances of Fig. 6.
Fig. 9 is the amplification longitudinal section of Fig. 8.
Embodiment
Below, based on accompanying drawing, the mode of execution for implementing dual pipe of the present invention and linkage structure thereof is described.
First, based on Fig. 1 ~ Fig. 5, the mode of execution for implementing dual pipe of the present invention is described.
Fig. 1 ~ Fig. 4 is the figure of the first case of the mode of execution represented for implementing dual pipe of the present invention.
In first case, expression be suitable as that the refrigerant passage etc. of on-vehicle air conditioner uses be formed as the smaller dual pipe of diameter.
As shown in Figure 1, the dual pipe 1 of first case is made up of outer tube 11 and interior pipe 12.
As shown in Figure 2, outer tube 11 and interior pipe 12, by the metallic material of aluminium series good for heat transfer property is squeezed into straight shape by extrusion die (punch die) D and is formed as one, become the shape that interior pipe 12 is disposed in the inside of outer tube 11.When the refrigerant passage as on-vehicle air conditioner etc. uses, the gas that the fluid of circulation has been refrigerant vapor in outer tube 11, in interior pipe 12, the fluid of circulation is the liquid of refrigeration agent.Therefore, outer tube 11 is low-voltage tubes, and interior pipe 12 is high-voltage tubes, but considers overall rigidity, is set to the wall thickness a of outer tube 11 thicker than the wall thickness b of interior pipe 12 (with reference to Fig. 1).
The section shape of outer tube 11 is formed as positive circle.
As indicated in figure 1, the section shape of interior pipe 12 is formed as tunnel-type.The tunnel-type of interior pipe 12 is formed in the following manner: using a part for the circular arc of outer tube 11 (common ground 13) as antetheca, sidewall 121 from common ground 13 across outer tube 11 diametric(al) abreast in opposite directions and extend, at the depth end of sidewall 121, the semicircular depth wall 122 that section shape protrudes in (depth direction) is laterally facing with common ground 13.The inner side surface 121a of sidewall 121 and the boundary portion of common ground 13 are formed as the little curved surface 14 as the minimum curve surface needed for extrusion process.Outer side surface 121b and the boundary portion of outer tube 11 of sidewall 121 are formed as the curved surface 15 larger than little curved surface 14.
As shown in Figure 3, according to first case, when the punching type perforation processing carrying out being connected for the branch of interior pipe 12 to outer tube 11 and the common ground 13 of interior pipe 12, certainly select the drift P of the size in the interval of the sidewall 121 of interior pipe 12.As shown in Fig. 3 (A), drift P carries out punching press action from the diametric(al) of the lateral outer tube 11 of common ground 13, as shown in Fig. 3 (B), offer hole 16 at common ground 13, be pressed into depth direction (depth wall 122 direction of interior pipe 12) along with the stampings 17 offering hole generation.
Now, because the inner side surface 121a of the sidewall 121 of interior pipe 12 and the boundary portion of common ground 13 are formed as little curved surface 14, the cut-out stress of drift P is easily concentrated, so easily cut off common ground 13, forms hole 16 effectively.In addition, to be subject to the guiding of the sidewall 121 of interior pipe 12 in both sides because of the stampings 17 that is pressed into by drift P and to slide at inner side surface 121a, being damaged by stampings 17 or stampings 17 is crimped the situation being fixed on interior pipe 12 so interior pipe 12 can not be there is.In addition, because the depth wall 122 being positioned at the depth end of the sidewall 121 of pipe 12 is not expanded to the semicircle of the degree at the interval exceeding sidewall 121, so stampings 17 can not be hidden in the internal corners of interior pipe 12.For this reason, as shown in Figure 4, after making drift P retrogressing, stampings 17 can be discharged simply by spraying air etc.
Therefore, the punching type perforation carrying out being connected for the branch of interior pipe 12 at outer tube 11 and the common ground 13 of interior pipe 12 adds man-hour, and the undesirable condition because stampings 17 causes can not occur.
And then, when using first case, because the depth wall of interior pipe 12 122 is semicircle, possess resistance to pressure, so the function as pipe in high-voltage tube 12 can be ensured effectively.
And then, because interior pipe 12 is formed as the shape being supported depth wall 122 by the sidewall 121 as two legs, even if so stubborn sth. made by twisting carry out pipe arrangement time interior pipe 12 also can not ulceration.Therefore, degree of gaining freedom in piping engineering.
And then, because the outer side surface 121b of the sidewall 121 of interior pipe 12 and the boundary portion of outer tube 11 are formed as curved surface 15, be the structure not forming close gap S (with reference to Fig. 1), so do not hinder the circulation of the fluid of outer tube 11 inside.In addition, curved surface 15 reinforces the sidewall 121 of interior pipe 12, and the pipe arrangement such to above-mentioned stubborn sth. made by twisting also plays resistance to stubborn sth. made by twisting, also contributes to the resistance to pressure improving interior pipe 12.
And then, because can in the direction orthogonal with the axle direction of outer tube 11 effectively internally pipe 12 carry out branch's connection, so be connected to the degree of gaining freedom such as the pipe arrangement system of connecting tube of interior pipe 12 or the configuration of flange connector.
Fig. 5 is the figure of the second case of the mode of execution represented for implementing dual pipe of the present invention.
Second case reduces the interior pipe 12 of first case, relative to the center of outer tube 11 with radial configuration three.
According to second case, the circulation path of multiple fluid can be gathered compactly.And, can more improve overall rigidity than first case, improve resistance to stubborn sth. made by twisting.
Then, based on Fig. 6 ~ Fig. 9, the mode of execution of the linkage structure for implementing dual pipe of the present invention is described.
As shown in Figure 6, this mode of execution is made up of each several part of dual pipe 1, interior effective connecting tube 2, outer effective connecting tube 3, connection flange 4.
Dual pipe 1 is made up of above-mentioned outer tube 11 and interior pipe 12.
As shown in Figure 8, Figure 9, relative to this dual pipe 1, when carrying out the perforation of the punching type for being connected interior pipe 12 processing to outer tube 11 and the common ground 13 of interior pipe 12, certainly select the drift P of the size in the interval of the sidewall 121 of interior pipe 12.In addition, as the shape of the cutting blade of drift P, secant plane is U-shaped (with reference to Fig. 8), tilts (with reference to Fig. 9) in the mode that the base portion Pa side of U-shaped is more outstanding than the Pb side, opening portion of U-shaped.In addition, on the end limit of the Pb side, opening portion of the U-shaped of drift P, do not have to arrange the blade with cutting function.
As shown in Figure 9, drift P carries out punching press action from the diametric(al) of the lateral outer tube 11 of common ground 13, offer the hole 16 connected at common ground 13, press to depth direction (depth wall 122 direction of interior pipe 12) along with the cut off machine 18 offering hole generation.In addition, the Pb side, opening portion of the U-shaped of drift P is positioned at port one 11,123 side of the connecting end becoming outer tube 11 and pipe 12.
Now, because the inner side surface 121a of the sidewall 121 of interior pipe 12 and the boundary portion of common ground 13 are formed as little curved surface 14, the cut-out stress of drift P is easily concentrated, so easily cut off common ground 13, forms hole 16 effectively.This hole 16 is that the patent part side becoming U-shaped (tongue-shaped, horse shoe shaped) and U-shaped according to the shape etc. of the cutting blade of drift P divides stay incomplete to offer hole at common ground 13 as non-cut-off portion.Therefore, along with offering this hole 16, cut off machine 18 is pressed into interior pipe 12 in the mode making the base portion side of U-shaped tilt as fulcrum the patent part side of U-shaped, outstanding in the inside of interior pipe 12.That is, cut off machine 18 is configured to acute angle relative to the axis in hole 16, and the circulation upstream side to the fluid circulated at interior pipe 12 tilts.
In addition, slide at inner side surface 121a because the cut off machine 18 be pressed into by drift P is guided by the sidewall 121 of interior pipe 12 in both sides, to be damaged by cut off machine 18 or the situation of interior pipe 12 is fixed in cut off machine 18 crimping so interior pipe 12 can not be there is.In addition, because the base portion side becoming the U-shaped of the front end of the cut off machine 18 be pressed into by drift P is towards comparing the sidewall 121 of interior pipe 12 not by the depth wall 122 more expanded, so can not form useless gap between cut off machine 18 and interior pipe 12.
Therefore, outer tube 11 and the common ground 13 of interior pipe 12 are carried out the punching type for being connected interior pipe 12 perforation add man-hour, the undesirable condition because cut off machine 18 causes can not be produced.
In addition, be pressed into the cut off machine 18 of interior pipe 12 to abut with the sidewall 121 of interior pipe 12 and depth wall 122.For this reason, by implementing soldering, block plug structure completely can be formed substantially relative to interior pipe 12.
As shown in Figure 6, Figure 7, in the hole 16 offered, utilize effective connecting tube 2 in brazing.Interior effective connecting tube 2 connects and is supported on connection flange 41.This connection is the technology of the linkage structure of known dual pipe itself, can easily implement.
And then the port one 23 of interior pipe 12 is processed by conquassation and is crimped also soldering at outer tube 11 and common ground 13 with arc-shaped.Its result, forms space 19 between the port one 23 and above-mentioned cut off machine 18 of interior pipe 12.This space 19 becomes complete totally enclosed state substantially.
And then in the port one 11 of outer tube 11, chimeric outer effective connecting tube 3 also utilizes soldering to connect.Within connecting and support effective connecting tube 2 connection flange 4 on, jointly connect and support outer effective connecting tube 3.
When using this mode of execution, circulate and the fluid of effective connecting tube 2 is guided by cut off machine 18 in flowing in interior pipe 12, travel direction is changed swimmingly.And, because the space 19 being in the back of cut off machine 18 is completely closed by cardinal principle, so fluid can not be detained, disturb near cut off machine 18.Therefore, in the fluid circulating in interior pipe 12 and interior effective connecting tube 2, ensure that the circulation of height.
Except above illustrated each example, also can change the outer tube 11 of dual pipe 1, the high-voltage tube of interior pipe 12, low-voltage tube, also can suitably change wall thickness a, b thereupon.
And then the outer tube 11 also going for dual pipe 1 is non-orbicular situation.
And then, also the number of pipe 12 in the outer tube 11 being configured at dual pipe 1 can be set to more than two or four.
And then, also the shape of the depth wall 122 of pipe 12 in dual pipe 1 can be set as shape beyond semicircle.
And then, for the angle of inclination of cut off machine 18, can according to forming space 19 that port one 23 side of inside pipe 12 be recessed into, the scope angle of the axis being parallel in hole 16 (until with) in new delay portion that do not form fluid sets.
Embodiment
When the mode of execution for implementing dual pipe of the present invention and linkage structure thereof being used as the refrigerant passage of on-vehicle air conditioner, the external diameter of the outer tube 11 of dual pipe 1 is 19mm, wall thickness a is 1.2mm, the wall thickness of the interior pipe 12 of dual pipe 1 is 1.0mm, the inner side surface 121a of sidewall 121 is spaced apart 5mm, and the center of depth wall 122 is set in be left the position of 4.61mm from the center of outer tube 11.
Industry utilizes possibility
Dual pipe of the present invention and linkage structure thereof also can be used for the purposes beyond for the refrigerant passage of on-vehicle air conditioner, go for the situation being formed as sizable diameter.
Claims (4)
1. a dual pipe, it is characterized in that, this dual pipe is pipe in the inside of outer tube arranges, a part for outer tube and interior pipe is formed as one by jointly changing, wherein, interior pipe has sidewall, this sidewall from the common ground of outer tube and interior pipe across outer tube diametric(al) abreast in opposite directions and extend, the degree at the interval exceeding sidewall is not expanded at the depth end of sidewall and the facing depth wall of the common ground of outer tube and interior pipe, the inside sidewalls face of interior pipe and the boundary portion of outer tube are formed as little curved surface, and the boundary portion of side-wall outer side face and outer tube is formed as large curved surface.
2. dual pipe as claimed in claim 1, it is characterized in that, the section shape of the depth wall of interior pipe is the semicircle protruded laterally.
3. the linkage structure of a dual pipe, it is characterized in that, the linkage structure of this dual pipe connects dual pipe, this dual pipe is pipe in the inside of outer tube arranges, a part for outer tube and interior pipe is formed as one by jointly changing, interior pipe has sidewall, this sidewall from the common ground of outer tube and interior pipe across outer tube diametric(al) abreast in opposite directions and extend, the degree at the interval exceeding sidewall is not expanded at the depth end of sidewall and the facing depth wall of the common ground of outer tube and interior pipe, the inside sidewalls face of interior pipe and the boundary portion of outer tube are formed as little curved surface, the boundary portion of side-wall outer side face and outer tube is formed as large curved surface, wherein, offer with the common ground of interior pipe the hole be connected at outer tube, hole becomes and has in a part incomplete that non-cut-off portion divides and offer hole, the cut off machine defining hole extends in the mode that the inside of the inside pipe of common ground from outer tube and interior pipe is given prominence to and abuts with the sidewall of interior pipe and depth wall.
4. the linkage structure of dual pipe as claimed in claim 3, is characterized in that, cut off machine tilts with the fluid of the acutangulate mode of the axis shape inside pipe relative to hole circulation upstream side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210017271.9A CN103216687B (en) | 2012-01-19 | 2012-01-19 | Dual tube and connecting structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210017271.9A CN103216687B (en) | 2012-01-19 | 2012-01-19 | Dual tube and connecting structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103216687A CN103216687A (en) | 2013-07-24 |
| CN103216687B true CN103216687B (en) | 2015-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210017271.9A Active CN103216687B (en) | 2012-01-19 | 2012-01-19 | Dual tube and connecting structure thereof |
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| CN (1) | CN103216687B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6803115A (en) * | 1968-03-05 | 1969-09-09 | ||
| JPS56103778U (en) * | 1980-01-09 | 1981-08-13 | ||
| JP4540430B2 (en) * | 2004-09-03 | 2010-09-08 | 芦森工業株式会社 | Pipelined lining method |
| JP2006336788A (en) * | 2005-06-03 | 2006-12-14 | Calsonic Kansei Corp | Terminal structure and terminal processing method for double pipe |
| US20080060199A1 (en) * | 2006-07-25 | 2008-03-13 | Christopher Alfred Fuller | Method of manufacturing a manifold |
| CN201177111Y (en) * | 2008-03-26 | 2009-01-07 | 超众科技股份有限公司 | Metal pipe for hot pipe |
| CN201457486U (en) * | 2009-06-30 | 2010-05-12 | 上海同济同捷科技股份有限公司 | Novel car doorsill beam |
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| CN103216687A (en) | 2013-07-24 |
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