CN103791177A - Muffling pipe fitting - Google Patents
Muffling pipe fitting Download PDFInfo
- Publication number
- CN103791177A CN103791177A CN201410013281.4A CN201410013281A CN103791177A CN 103791177 A CN103791177 A CN 103791177A CN 201410013281 A CN201410013281 A CN 201410013281A CN 103791177 A CN103791177 A CN 103791177A
- Authority
- CN
- China
- Prior art keywords
- pipe fitting
- sound deadening
- deadening pipe
- noise reduction
- main body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/21—Rigid pipes made of sound-absorbing materials or with sound-absorbing structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/20—Double-walled hoses, i.e. two concentric hoses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/26—Hoses, i.e. flexible pipes made of sound-absorbing materials or with sound-absorbing structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Sink And Installation For Waste Water (AREA)
Abstract
The invention discloses a muffling pipe fitting comprising an inner pipe (2) and an outer pipe (3). The inner pipe (2) and the outer pipe (3) are coaxial. The outer wall of the inner pipe (2) is connected with the inner wall of the outer pipe (3) through a connector (21). The pipe fitting is in the two-layer structure; after the inner and outer pipes are connected through the connector (21), a plurality of air cavities form preferably; sound travels in solid and air at different speeds, and travels in the air far faster than in the pipe made of plastic; meanwhile, the overall thickness of the pipe wall is increased; the increased wall thickness greatly blocks propagation of sound, and the presence of the air cavities also decreases the speed of propagation, and noise is reduced accordingly. The muffling pipe fitting is capable of greatly decreasing high noise produced in the water transport process.
Description
Technical field
The present invention relates to pipe fitting, particularly, relate to a kind of sound deadening pipe fitting.
Background technique
Pipe fitting is as a kind of means of delivery, in daily life with extensive use in producing.In daily life and producing, pipe fitting is convenient with its using method, have wide range of applications and receive much concern.
But in practice, the impact as the pipe fitting of transport liquid because of current, often can produce larger noise, bring great inconvenience to daily life and production.So, a kind of sound deadening pipe fitting that can reduce current noise in transportation process is provided, be the problem that the present invention needs solution badly.
Summary of the invention
For above-mentioned prior art, the object of the invention is can produce in current transportation process in order to overcome existing pipe fitting the deficiency of larger noise, a kind of new sound deadening pipe fitting is provided.
To achieve these goals, the invention provides a kind of sound deadening pipe fitting, wherein, described sound deadening pipe fitting comprises the inner and outer tubes of coaxial setting, between the outer wall of described inner tube and the inwall of described outer tube, connects by link.
Preferably, described link is plate, and one group of opposite side on the outer wall that is connected to inner tube of described plate and the inwall of outer tube extends along the axial direction of sound deadening pipe fitting, and another group opposite side extends along the radial direction of sound deadening pipe fitting.
Preferably, the number of described link is 10-30 bar, and more preferably, multiple links are divided equally and arranged along the circumferencial direction of sound deadening pipe fitting.
Preferably, on described outer tube outer wall, also dispose noise reduction band.
Preferably, described outer tube disposes the end at main body and main body two ends, and described noise reduction band is disposed on described main body outer surface.
Preferably, described noise reduction band is disposed at along the circumferential direction of described outer tube on the periphery wall of described main body, and described noise reduction band is circular arc and/or annulus.
Preferably, described noise reduction band is many, and described noise reduction band is annulus, and arranges in the periphery wall equal intervals of described main body; Or described noise reduction band comprises circular arc and annulus, and described circular arc and annulus are in the periphery wall equal intervals of described main body and be intervally arranged.
Preferably, also dispose spiral bar on the internal surface of described inner tube, preferably, described spiral bar is many, and many spiral bars on described interior pipe internal surface are parallel to each other.
Preferably, between the inwall of described outer tube and the outer wall of described inner tube, be also filled with quieter material.
Preferably, described sound deadening pipe fitting is structure as a whole.
The present invention is set to double layer construction by pipe fitting, after connecting by link between two-layer body, be preferably formed multiple air cavitys, and then utilize sound velocity of propagation inconsistent in solid and air, for the body of plastic material, the aerial velocity of propagation of sound is much smaller than the velocity of propagation in plastics, simultaneously, also increased the integral thickness of tube wall, both because of the increase of pipe thickness, greatly intercept the propagation of sound, also because of the existence of air cavity, reduced velocity of propagation, thereby reduced noise simultaneously.Utilize sound deadening pipe fitting provided by the invention, can greatly be reduced in the larger noise producing in current transportation process.
Other features and advantages of the present invention are described in detail the embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the schematic diagram of a kind of sound deadening pipe fitting provided by the invention;
Fig. 2 be a kind of sound deadening pipe fitting provided by the invention along axial sectional drawing.
Description of reference numerals
2-inner tube 3-outer tube
11-end 12-main body
13-noise reduction band 21-link
22-spiral bar.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
Fig. 1 is the surface structure schematic diagram of a kind of sound deadening pipe fitting provided by the invention; Fig. 2 be a kind of sound deadening pipe fitting provided by the invention along axial sectional drawing.As shown in Figure 1, the invention provides a kind of sound deadening pipe fitting, wherein, described sound deadening pipe fitting comprises inner tube 2 and the outer tube 3 of coaxial setting, between the outer wall of described inner tube 2 and the inwall of described outer tube 3, connects by link 21.As shown in Figure 2, under preferable case, in order to reach better reinforing function, and form multiple air cavitys and there is better silencing function, the number of described link 21 is 10-30 bar, and more preferably, multiple links 21 are divided equally and arranged along the circumferencial direction of sound deadening pipe fitting.Described link 21 is plate, and one group of opposite side on the outer wall that is connected to inner tube 2 of described plate and the inwall of outer tube 3 extends along the axial direction of sound deadening pipe fitting, and another group opposite side extends along the radial direction of sound deadening pipe fitting.
The present invention is set to double layer construction by pipe fitting, between two-layer body, form cavity, and then utilize sound velocity of propagation inconsistent in solid and air, for the body of plastic material, the aerial velocity of propagation of sound is much smaller than the velocity of propagation in plastics, meanwhile, also increase the integral thickness of tube wall, both because of the increase of pipe thickness, greatly intercept the propagation of sound, also because of the existence of cavity, reduced velocity of propagation, thereby reduced noise simultaneously.Simultaneously also by link 21 is set between inner and outer tubes, in the cavity that described link 21 is formed with outer tube 3 in inner tube 2, divide equally arrange and shape consistent, thereby above-mentioned cavity is divided into multiple air cavitys of the same size, and then avoids causing because of unbalance stress the reduction in sound deadening pipe fitting life-span.Preferably, described link 21 is integrated molding and forming with described inner tube 2 and outer tube 3.
In addition, described link 21, if the material of plate can be the various materials that are applicable in pipe fitting, for example, can be polyolefine material, concrete, can be polyethylene.
One of the present invention preferred embodiment in, as shown in Figure 1, on described outer tube 3 outer walls, also dispose noise reduction band 13, and preferred described noise reduction band 13 is integrated molding and forming with described body.Described noise reduction band is the protruding band being arranged on outer tube 3 outer walls.
According to the present invention, because pipe fitting two ends water impact pressure is larger, in order to strengthen the intensity at sound deadening pipe fitting two ends, preferably, described outer tube 3 disposes the end 11 at main body 12 and main body 12 two ends.End 11 pipe thicknesses at main body 12 and main body 12 two ends can be consistent or inconsistent, in order to increase the intensity of end, two ends 11, one preferred embodiment in, the outer diameter of described main body 12 is less than the outer diameter of end 11 at described main body 12 two ends and the inner diameter of the end 11 at main body 12 and main body 12 two ends equates, the pipe thickness of described main body 12 is less than the pipe thickness of the end 11 at described main body 12 two ends.More preferred, described noise reduction band 13 is circular arc and/or circular being equidistantly disposed on described main body 12 outer surfaces along the circumferential direction of described outer tube 3.According to one wherein, preferred embodiment, described noise reduction band 13 is annulus; According to another preferred embodiment, described noise reduction band 13 comprises annulus and circular arc, and described annulus and circular arc are in the periphery wall equal intervals of described main body 12 and be intervally arranged.By noise reduction band 13 is set on outer wall, promote the intensity of body largelyr, use noise reduction band 13 simultaneously, reduce current by time the body resonance that produces, and then further reduce the noise producing.
In another preferred embodiment of the present invention, on the internal surface of described inner tube 2, also dispose spiral bar 22, preferred described spiral bar 22 is many, and many spiral bars 22 on described inner tube 2 internal surfaces are parallel to each other.The spiral bar 22 configuring on inner tube 2 internal surfaces, for being arranged on the raised item on inner tube 2 internal surfaces, for example, can be arranged to spiral-shaped raised line.Preferably, described spiral bar 22 is integrated molding and forming with described body.By spiral bar 22 is set at inboard wall of tube body, utilize spiral bar 22 to carry out water conservancy diversion to current, current in pipeline are stayed by rotation, because of current in the time flowing and the inwall of pipe fitting be close together, so in lateral current inlet pipe part, just can pipe fitting inner wall not produced repeatedly and be impacted, thereby reduction noise, simultaneously in the time that current flow down along tube wall, have a unimpeded whirlpool air column in pipeline the inside, make internal pipe pressure that larger fluctuation can not occur, can greatly reduce when current after colliding, hung down touch with air together with time the various noises and the bubble sound that send, while is because of the configuration of spiral bar 22, increase the compressive strength of body, promote water displacement.
In another embodiment of the present invention, between the inwall of described outer tube 3 and the outer wall of described inner tube 2, be also filled with quieter material.By filling quieter material, more effectively intercept the noise that current produce, thereby further reduce noise.Described quieter material can be the various quieter materials of related domain routine, and for example, described quieter material can be selected from one or more in wave cotton, oil cellucotton and glass fibre cotton.
Preferably, described sound deadening pipe fitting is structure as a whole.The sound deadening pipe fitting of this integrative-structure is that the conventional production method production using in related domain obtains, a for example mould molding and forming, by described sound deadening pipe fitting is arranged to integrative-structure, separation between the each parts of sound deadening pipe fitting of having avoided causing because of factors such as water impact, avoids the increase of the cost of repairs causing because of various external force factors.
According to a kind of concrete mode of execution of the present invention, as shown in Figure 1, the invention provides a kind of sound deadening pipe fitting, wherein, described sound deadening pipe fitting comprises inner tube 2 and the outer tube 3 of coaxial setting, between the outer wall of described inner tube 2 and the inwall of described outer tube 3, connects by link 21.As shown in Figure 2, described link 21 is plate, and one group of opposite side on the outer wall that is connected to inner tube 2 of described plate and the inwall of outer tube 3 extends along the axial direction of sound deadening pipe fitting, and another group opposite side extends along the radial direction of sound deadening pipe fitting.The number of described link 21 is 20 and divides equally and arrange along the circumferencial direction of sound deadening pipe fitting.Described outer tube 3 disposes the end 11 at main body 12 and main body 12 two ends, the outer diameter of end 11 is greater than the outer diameter of main body 12, the inner diameter of the inner diameter of end 11 and main body 12 equates, on described outer tube 3 outer walls, also dispose many noise reduction bands 13, described noise reduction band 13 is circular along the circumferential direction of described outer tube 3 and is equidistantly disposed on described main body 12 outer surfaces.Many the spiral bars 22 that also dispose on the internal surface of described inner tube 2 on many spiral bars 22 and described inner tube 2 internal surfaces are parallel to each other.Described body is a mould molding and forming.Between the outer wall of the inwall of described outer tube 3 and described inner tube 2, be also filled with quieter material glass fibre cotton.
The concrete mode of execution of another kind according to the present invention, the invention provides a kind of sound deadening pipe fitting, and wherein, described sound deadening pipe fitting comprises inner tube 2 and the outer tube 3 of coaxial setting, between the outer wall of described inner tube 2 and the inwall of described outer tube 3, connects by link 21.Described link 21 is plate, and one group of opposite side on the outer wall that is connected to inner tube 2 of described plate and the inwall of outer tube 3 extends along the axial direction of sound deadening pipe fitting, and another group opposite side extends along the radial direction of sound deadening pipe fitting.The number of described link 21 is 20 and divides equally and arrange along the circumferencial direction of sound deadening pipe fitting.Described outer tube 3 disposes the end 11 at main body 12 and main body 12 two ends, the outer diameter of end 11 is greater than the outer diameter of main body 12, the inner diameter of the inner diameter of end 11 and main body 12 equates, on described outer tube 3 outer walls, also dispose many noise reduction bands 13, described noise reduction band 13 comprises circular arc and annulus, and circular arc and annulus are staggered and equidistantly arrange along the circumferential direction of described outer tube 3.Preferably, the arc length of every circular arc all equates, and described circular arc aligned fashion, or, described circular arc relatively distribute (for example, the body surface at the place of every major arc can to form the minor arc part of annulus relative with this major arc).Alternately arrange by noise reduction band 13 being arranged to annulus and circular arc, both reached the as above consistent erasure effect of a mode of execution, also relatively saved material, reduced cost of production.Many the spiral bars 22 that also dispose on the internal surface of described inner tube 2 on many spiral bars 22 and described inner tube 2 internal surfaces are parallel to each other.Described body is a mould molding and forming.Between the outer wall of the inwall of described outer tube 3 and described inner tube 2, be also filled with quieter material wave cotton.
In addition, according to the present invention, the material of described inner tube 2 and outer tube 3 can be the material of the conventional pipe fitting in related domain, and for example, polyolefin, is specifically as follows polyethylene.
The sound deadening pipe fitting of said structure is set to double layer construction and between double layer construction, is filled quieter material by body, thereby intercept the propagation of sound, reduce the generation of noise, pass through at body outer installment noise reduction band 13 again, increase the intensity of body and reduced resonance, thereby having reached the object that reduces noise.Simultaneously by spiral bar 22 is set at inner surface of tube body, thereby current are carried out to water conservancy diversion, also improved the intensity of tubing simultaneously, both increased the intensity of body, also improved water displacement.Design by said structure, thereby reduced the noise producing in water flow process, played the effect of noise reduction.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between various mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a sound deadening pipe fitting, is characterized in that, described sound deadening pipe fitting comprises inner tube (2) and the outer tube (3) of coaxial setting, between the outer wall of described inner tube (2) and the inwall of described outer tube (3), connects by link (21).
2. sound deadening pipe fitting according to claim 1, it is characterized in that, described link (21) is plate, one group of opposite side on the outer wall that is connected to inner tube (2) of described plate and the inwall of outer tube (3) extends along the axial direction of sound deadening pipe fitting, and another group opposite side extends along the radial direction of sound deadening pipe fitting.
3. sound deadening pipe fitting according to claim 1 and 2, is characterized in that, the number of described link (21) is 10-30 bar, and preferably, multiple links (21) are divided equally and arranged along the circumferencial direction of sound deadening pipe fitting.
4. sound deadening pipe fitting according to claim 1, is characterized in that, on described outer tube (3) outer wall, also disposes noise reduction band (13).
5. sound deadening pipe fitting according to claim 4, is characterized in that, described outer tube (3) disposes the end (11) at main body (12) and main body (12) two ends, and described noise reduction band (13) is disposed on described main body (12) outer surface.
6. according to the sound deadening pipe fitting described in claim 4 or 5, it is characterized in that, described noise reduction band (13) is disposed on the periphery wall of described main body (12) along the circumferential direction of described outer tube (3), and described noise reduction band (13) is circular arc and/or annulus.
7. sound deadening pipe fitting according to claim 6, is characterized in that, described noise reduction band (13) is many, and described noise reduction band (13) is annulus, and arranges in the periphery wall equal intervals of described main body (12); Or described noise reduction band (13) comprises circular arc and annulus, and described circular arc and annulus are in the periphery wall equal intervals of described main body (12) and be intervally arranged.
8. sound deadening pipe fitting according to claim 1 and 2, it is characterized in that, on the internal surface of described inner tube (2), also dispose spiral bar (22), preferably, described spiral bar (22) is many, and many spiral bars (22) on described inner tube (2) internal surface are parallel to each other.
9. according to the sound deadening pipe fitting described in any one in claim 1-8, it is characterized in that, between the inwall of described outer tube (3) and the outer wall of described inner tube (2), be also filled with quieter material.
10. according to the sound deadening pipe fitting described in any one in claim 1-8, it is characterized in that, described sound deadening pipe fitting is structure as a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410013281.4A CN103791177B (en) | 2014-01-10 | 2014-01-10 | Sound deadening pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410013281.4A CN103791177B (en) | 2014-01-10 | 2014-01-10 | Sound deadening pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103791177A true CN103791177A (en) | 2014-05-14 |
| CN103791177B CN103791177B (en) | 2016-11-23 |
Family
ID=50667106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410013281.4A Expired - Fee Related CN103791177B (en) | 2014-01-10 | 2014-01-10 | Sound deadening pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103791177B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795251A (en) * | 2020-07-05 | 2020-10-20 | 潍坊福泰机械有限公司 | Pipe fitting |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3903928A (en) * | 1972-08-15 | 1975-09-09 | Smiths Industries Ltd | Vehicle exhaust tubing |
| EP0342802A2 (en) * | 1988-05-20 | 1989-11-23 | Smiths Industries Public Limited Company | Ducting |
| CN201651598U (en) * | 2010-03-20 | 2010-11-24 | 永高股份有限公司 | Hollow wall spiral hush pipe |
| CN202100843U (en) * | 2011-01-27 | 2012-01-04 | 王领法 | Sound insulation drainage pipe |
| CN202215859U (en) * | 2011-07-30 | 2012-05-09 | 青阳县三宝塑业有限责任公司 | Helical vacuum sound deadening water pipe |
| CN203784488U (en) * | 2014-01-10 | 2014-08-20 | 芜湖新磊塑胶科技有限公司 | Silencing pipe |
-
2014
- 2014-01-10 CN CN201410013281.4A patent/CN103791177B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3903928A (en) * | 1972-08-15 | 1975-09-09 | Smiths Industries Ltd | Vehicle exhaust tubing |
| EP0342802A2 (en) * | 1988-05-20 | 1989-11-23 | Smiths Industries Public Limited Company | Ducting |
| CN201651598U (en) * | 2010-03-20 | 2010-11-24 | 永高股份有限公司 | Hollow wall spiral hush pipe |
| CN202100843U (en) * | 2011-01-27 | 2012-01-04 | 王领法 | Sound insulation drainage pipe |
| CN202215859U (en) * | 2011-07-30 | 2012-05-09 | 青阳县三宝塑业有限责任公司 | Helical vacuum sound deadening water pipe |
| CN203784488U (en) * | 2014-01-10 | 2014-08-20 | 芜湖新磊塑胶科技有限公司 | Silencing pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795251A (en) * | 2020-07-05 | 2020-10-20 | 潍坊福泰机械有限公司 | Pipe fitting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103791177B (en) | 2016-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103097710A (en) | Fluid line comprising a resonator | |
| WO2010100474A2 (en) | A fluid transfer pipe and fluid transfer apparatus and a fluid attenuator and attenuator apparatus | |
| CN103791176A (en) | Muffling pipe fitting | |
| CN203784488U (en) | Silencing pipe | |
| CN103791177A (en) | Muffling pipe fitting | |
| PL1806458T3 (en) | Plastic tank | |
| CN203784487U (en) | Silencing pipe | |
| RU2011102365A (en) | PIPE TRANSITION COUPLING FROM PLASTIC MATERIAL | |
| CN203784489U (en) | Silencing pipe | |
| CN105526436B (en) | The outer muscle enhancing bellows of internal-rib | |
| WO2008036583A3 (en) | Tubing and method for manufacture | |
| CN103791175A (en) | Muffling pipe fitting | |
| CN204254063U (en) | A kind of structure enhancement mode PE helical double-wall corrugated tube | |
| CN203784541U (en) | Helical silencing tee | |
| CN209414784U (en) | A kind of axially hollow wall plastic tube | |
| CN204099750U (en) | Steel band reinforced spiral ripple pipe | |
| CN204692779U (en) | A kind of two internal-rib strengthens winding structure pipe | |
| CN102679046A (en) | Flow- optimized fluid line | |
| CN106195462A (en) | Three-layer co-extruded sandwich honeycomb duct and production technology thereof | |
| CN104182574B (en) | Design method based on linear change helical angle concrete stirring vane | |
| JP2017019171A5 (en) | ||
| CN203628240U (en) | Plastic tubing | |
| CN208845880U (en) | A kind of enhanced dual anti-bellows of bilayer of internal-rib | |
| CN205239015U (en) | Prevent extrudeing automobile -used inner tube of a tyre | |
| CN108869901A (en) | A kind of double-wall corrugated pipe as structure-wall pipe material hollow reinforced rib |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20180110 |