CN101813225A - Low-resistance square pant tee joint - Google Patents
Low-resistance square pant tee joint Download PDFInfo
- Publication number
- CN101813225A CN101813225A CN 201010181508 CN201010181508A CN101813225A CN 101813225 A CN101813225 A CN 101813225A CN 201010181508 CN201010181508 CN 201010181508 CN 201010181508 A CN201010181508 A CN 201010181508A CN 101813225 A CN101813225 A CN 101813225A
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- intrados
- pant
- tee joint
- threeway
- pants
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Abstract
The invention discloses a low-resistance square pant tee joint which comprises a main pipe and branch pipes. The branch pipes symmetrically and divaricately extend to both ends along the end of the main pipe, inner arc surfaces are arranged on the connection sections of the main pipe and the branch pipes, and an outer arc surface is arranged on either branch pipe corresponding to the inner arc surface. The low-resistance square pant tee joint is characterized in that another inner arc surface is arranged on the connection section between an inner arc surface and the main pipe to form two inner arc surfaces in transition connection, and the two sections of inner arc surfaces are respectively connected with the outer arc surfaces of the two branch pipes and the four sides of the main pipe to form a rectangular tee joint with an inlet passage and two outlet passages. The unique design of the pant tee joint simultaneously eliminates a vortex region generated by fluid flowing by the inner arc surfaces of the pant tee joint and a vortex region generated at the joint between the fluid and the pant tee joint so as to reduce the resistance of the fluid passing by the pant tee joint.
Description
Technical field
The present invention relates to a kind of local member of air conditioner, especially a kind of low-resistance square pant tee joint member.
Background technique
The pants threeway belongs to the pipe fitting that changes direction of flow and shunting, in distribution pipeline, because the turning of fluid, occurred from the centrifugal force of centre of curvature to the pipe outer arced surface, this with regard to make fluid from the straightway of pipeline carry out the transition to bending tube section (turn round finish before) time, the increased pressure of outer arced surface and the pressure reduction of intrados.So flow rate of fluid will reduce at the outer arced surface place, and correspondingly increase in intrados place flow rate of fluid.Therefore, diffusion effect occurs, and blockage effect occurring near the intrados place at the outer arced surface annex.When fluid carries out the transition to straight length (back of turning round) from bending tube section, there is opposite phenomenon to take place again, promptly produces diffusion effect near the intrados, produce blockage effect near the outer arced surface.Diffusion effect makes fluid break away from wall, and the bending tube section fluid motion that flows to outer arced surface owing to inertia has simultaneously more aggravated the separation from intrados.
Fluid flows in pants three-way shunt (being equivalent to bend pipe), and suffered centrifugal force is directly proportional with square of flow velocity, and the centrifugal force of Gu Gaoliusuquchu is greater than the centrifugal force near wall place.This moment makes current generate secondary circulation (vortex pair) on pants three-way shunt (being equivalent to bend pipe) transverse section.Promptly form so-called eddy current pair.It is attached on the main flow with the pipeline parallel axes, and it is spiral-shaped that streamline is had, and this spirality form of current is not limited to ram's horns itself, also continues on the straight line pipeline section of certain-length behind the ram's horns.Pants threeway local resistance is because these the 2 kinds of phenomenons in the above-mentioned pants threeway water flow structure: the vortex on (1) pants threeway intrados.(2) the secondary vortex of pants threeway and straight tube connecting part, as shown in Figure 1.Flow in the vortex that forms and axial flow has stronger momentum transfer at the interface place because the boundary layer breaks away from, and consumed the energy of main flow, formed the local resistance loss of pants threeways.Wherein the vortex that forms of intrados place plays a major role, and it has determined the deformation in flow field on certain straight length after the resistance of pants threeways and the pants threeway basically.Experiment shows that eddy region is big more, vortex intensity is big more, and local resistance loss is also big more.Secondary flow then plays an important role to the distribution again of pants threeway axial flow velocity, and this is the once mobile energy of distributed process consumption again, has increased pants threeway local resistance loss.The characteristics of the eddy current that intrados forms pipeline velocity distribution after secondary flow has determined to turn basically.These are influenced the space and far are not limited to pants threeway itself, but expanded to the upstream and downstream of pants threeway by the energy consumption that flows and form in the pants threeway.The pants threeway influences to 1-2 times of caliber farthest to the influence of upstream, and the downstream then influences to 5 times of calibers.
The past people in ventilation and air conditioning system main utilization be common pants threeway, as shown in Figure 3, and common pants threeway is regardless of and confluxes and shunting.Simultaneously, because the intrados radius of common pants threeway is too small, cambered surface is less, make fluid in vortex zone through negative pressure of generation, high flow rate in it.Very big resistance itself can be caused in this vortex zone, and it also can make and produce a big vortex district at fluid after through the pants threeway simultaneously.And the resistance of these two vortex districts when directly causing fluid to pass through increases.In other words, the intrados of pants threeway is the main position that resistance increases when causing fluid through the pants threeway.
Occur some in recent years and reduced the streamline turning pipe fitting of resistance in the fluid corner, as Chinese patent, the patent No. is the disclosed a kind of elbow with stator of ZL95102932.0, Chinese patent for another example, and publication number is the disclosed a kind of smoke canal elbow of CN101315194.They have stator in inside, by the water conservancy diversion of stator convection cell the vortex at bend pipe intrados place are eliminated, thereby are reached the effect that reduces resistance.But because it need add guide vane in the bend pipe again, its manufacturing and installation relative complex, cost also can be higher relatively.
Summary of the invention
The purpose of this invention is to provide the square pants threeway of a kind of novel low-resistance, the unique design of this pants threeway has been eliminated the vortex district that fluid produces simultaneously through pants threeway intrados the time; The vortex district that produces in pants threeway and straight tube connecting part with fluid, thus finally reach resistance when reducing fluid through the pants threeway.
To achieve these goals, the objective of the invention is to be achieved through the following technical solutions, provide a kind of novel low-resistance square pants threeway, comprise that one is responsible for and the arm that extends to the two ends SYMMETRIC BIFURCATION along this person in charge termination, be respectively equipped with intrados along this person in charge and two arm linkage sections, the arm of corresponding two intrados is provided with two outer arced surface, it is characterized in that: establish another intrados at described intrados with being responsible for linkage section, constitute two sections transition and connect intrados; These two two sections transition connect intrados respectively with described two arms on outer arced surface and four sides being responsible for be connected, be formed with an inlet channel and the rectangle threeway of two outlet passages arranged.
It is first intrados and second intrados that described two sections transition connect intrados, and first intrados is on the person in charge side of the described second intrados lower end; The radius of described first intrados and arc length are greater than the radius and the arc length of outer arced surface; The radius of outer arced surface and arc length are greater than the radius and the arc length of second intrados; And the center of circle of first intrados and second intrados is respectively on the elongated surfaces of inlet section and outlet section.
As seen from the above, the present invention is at first slowed down to the fluid that becomes a mandarin of pressing close to the intrados place and slowly break-in by first intrados, makes fluid slowly by producing the front half part intrados in negative pressure, high speed vortex district.Fluid through behind the front half part intrados in order to make the fluid fast steering, second intrados radius and arc length all less.After just making fluid through the pants threeway, this is not forming vortex with pants threeway joining part.Thereby vortex and the fluid of eliminating pants threeway intrados place simultaneously pass through the vortex that produces after the pants threeway, as shown in Figure 4.Thereby reach effect than slight drag.
The present invention compares with prior art, need not to eliminate the vortex at bend pipe intrados place by the guide functions of adding the stator convection cell in bend pipe, thereby reaches the purpose that reduces resistance.Its manufacturing is relative simple with installation, and cost is low, and is easy to utilize.
Description of drawings
Fig. 1 is common pants threeway flow field and vortex schematic representation; Fig. 2 is novel low-resistance square pants threeway flow field and vortex schematic representation; Fig. 3 is existing square pants threeway schematic representation; Fig. 4 is the square pants threeway of a novel low-resistance schematic representation.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is done explanation in further detail.
As shown in Figure 4, the square pants threeway of novel low-resistance of the present invention, comprise that one is responsible for and the arm that extends to the two ends SYMMETRIC BIFURCATION along this person in charge termination, be respectively equipped with intrados along this person in charge and two arm linkage sections, the arm of corresponding two intrados is provided with two outer arced surface 3, wherein: establish another intrados at described intrados with being responsible for linkage section, constitute two sections transition and connect intrados; These two two sections transition connect intrados respectively with described two arms on outer arced surface 3 and four sides 4 being responsible for be connected, be formed with an inlet channel and the rectangle threeway of two outlet passages arranged.
It is first intrados 1 and second intrados 2 that above-mentioned two sections transition connect intrados, and first intrados 1 is on the person in charge side of described second intrados 2 lower ends; The radius of first intrados 1 is greater than the radius of outer arced surface 3; The radius of outer arced surface 3 is greater than the radius of second intrados 2; The arc length of first intrados 1 is greater than the arc length of outer arced surface 3; The arc length of outer arced surface 3 is greater than the arc length of second intrados 2; The center of circle non-overlapping copies of the center of circle of the center of circle of first intrados 1, second intrados 2, outer arced surface 3; The center of circle of first intrados 1 is on the elongated surfaces of being responsible for the inlet section; The center of circle of second intrados 2 goes out on the elongated surfaces of a mouth of pipe section in its correspondence.
As shown in Figure 2, the fluid that becomes a mandarin that the present invention at first presses close to the intrados place by 1 pair of first intrados slows down and slowly break-in, makes fluid slowly by producing the front half part intrados in negative pressure, high speed vortex district.Fluid through behind the front half part intrados in order to make the fluid fast steering, second intrados 2 radius and arc length all less.After just making fluid through the pants threeway, this is not forming vortex with pants threeway joining part.Thereby vortex and the fluid of eliminating pants threeway intrados place simultaneously pass through the vortex that produces after the pants threeway.Thereby the resistance when reducing fluid and flowing through the pants threeway.
Claims (3)
1. low-resistance square pant tee joint, comprise that one is responsible for and the arm that extends to the two ends SYMMETRIC BIFURCATION along this person in charge termination, be respectively equipped with intrados along this person in charge and two arm linkage sections, the arm of corresponding two intrados is provided with two outer arced surface (3), it is characterized in that: establish another intrados at described intrados with being responsible for linkage section, constitute two sections transition and connect intrados; These two two sections transition connect intrados respectively with described two arms on outer arced surface (3) and four sides (4) of being responsible for be connected, be formed with an inlet channel and the rectangle threeway of two outlet passages arranged.
2. low-resistance square pant tee joint according to claim 1, it is characterized in that: it is first intrados (1) and second intrados (2) that described two sections transition connect intrados, and first intrados (1) is on the person in charge side of described second intrados (2) lower end.
3. low-resistance square pant tee joint according to claim 1 is characterized in that: the radius of described first intrados (1) and arc length are greater than the radius and the arc length of outer arced surface (3); The radius of outer arced surface (3) and arc length are greater than the radius and the arc length of second intrados (2); And the center of circle of first intrados (1) and second intrados (2) is respectively on the elongated surfaces of inlet section and outlet section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101815088A CN101813225B (en) | 2010-05-25 | 2010-05-25 | Low-resistance square pant tee joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101815088A CN101813225B (en) | 2010-05-25 | 2010-05-25 | Low-resistance square pant tee joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101813225A true CN101813225A (en) | 2010-08-25 |
| CN101813225B CN101813225B (en) | 2011-06-15 |
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ID=42620547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101815088A Expired - Fee Related CN101813225B (en) | 2010-05-25 | 2010-05-25 | Low-resistance square pant tee joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101813225B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691528A (en) * | 2011-03-25 | 2012-09-26 | 株式会社东芝 | Steam valve device and steam turbine plant |
| CN104455872A (en) * | 2014-12-05 | 2015-03-25 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Low-flow-resistance tee joint structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61102589A (en) * | 1984-10-25 | 1986-05-21 | 石川島播磨重工業株式会社 | Quencher for nuclear-reactor main steam escape pipe |
| JPH11287378A (en) * | 1998-04-03 | 1999-10-19 | Kurimoto Ltd | Branch pipe |
| CN1828115A (en) * | 2006-03-29 | 2006-09-06 | 河北宏润管道集团有限公司 | Preparation method of Y-shaped hot-pressed three-way pipe fitting |
| JP2009002099A (en) * | 2007-06-25 | 2009-01-08 | Sekisui Chem Co Ltd | Pipe joint for by-pass ventilation, and drainage system using the pipe joint for by-pass ventilation |
-
2010
- 2010-05-25 CN CN2010101815088A patent/CN101813225B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61102589A (en) * | 1984-10-25 | 1986-05-21 | 石川島播磨重工業株式会社 | Quencher for nuclear-reactor main steam escape pipe |
| JPH11287378A (en) * | 1998-04-03 | 1999-10-19 | Kurimoto Ltd | Branch pipe |
| CN1828115A (en) * | 2006-03-29 | 2006-09-06 | 河北宏润管道集团有限公司 | Preparation method of Y-shaped hot-pressed three-way pipe fitting |
| JP2009002099A (en) * | 2007-06-25 | 2009-01-08 | Sekisui Chem Co Ltd | Pipe joint for by-pass ventilation, and drainage system using the pipe joint for by-pass ventilation |
Non-Patent Citations (1)
| Title |
|---|
| 《暖通空调》 20091231 李安桂等 管道弯头和三通近距离耦合阻力系数实验研究 23-28 1-3 第39卷, 第10期 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691528A (en) * | 2011-03-25 | 2012-09-26 | 株式会社东芝 | Steam valve device and steam turbine plant |
| CN102691528B (en) * | 2011-03-25 | 2015-09-30 | 株式会社东芝 | Steam valve device and steam turbine installation |
| US9790805B2 (en) | 2011-03-25 | 2017-10-17 | Kabushiki Kaisha Toshiba | Steam valve device and steam turbine plant |
| EP2503105A3 (en) * | 2011-03-25 | 2017-12-20 | Kabushiki Kaisha Toshiba | Steam valve device and steam turbine plant |
| CN104455872A (en) * | 2014-12-05 | 2015-03-25 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Low-flow-resistance tee joint structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101813225B (en) | 2011-06-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20110615 Termination date: 20180525 |