CN101070934A - Corrugated pipe made of thermoplastic plastics - Google Patents
Corrugated pipe made of thermoplastic plastics Download PDFInfo
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- CN101070934A CN101070934A CN 200610075775 CN200610075775A CN101070934A CN 101070934 A CN101070934 A CN 101070934A CN 200610075775 CN200610075775 CN 200610075775 CN 200610075775 A CN200610075775 A CN 200610075775A CN 101070934 A CN101070934 A CN 101070934A
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Abstract
The invention relates to a sylphon made of thermoplastic plastics (1), including inside tube (2) and waveform outer tube which is combined with inside tube (3), the figure of outer tube includes the first part of the first average diameter (4), the second part of the second average diameter(5) and the side wall between them(6), the second average diameter mentioned above is greater than the first average diameter, the side wall mentioned above linked (4)and every adjacent (5)together. The geometric ratio of (1) provides not only great rigidity against the radial pressure of sylphon but also great flexibility in the direction of crossed longitudinal axis, and is lighter than traditional ones. Thus, it needs less plastic in production, and is facilitate to operate the sylphon when lay down.
Description
Invention field
The present invention relates to a kind of bellows of making by thermoplastic.
Background technique
EP0385465B2 discloses a kind of conduit that is made of plastics, be specially adapted to waste water, waveform (gewe11t) outer tube that this conduit has smooth interior pipe and combines with it, this conduit can connect and links to each other with identical conduit or smooth single wall conduit through sleeve.
EP0820566B1 discloses a kind of multiply bellows, and this pipe has smooth interior pipe, outer tube in wave shape and plastic layer therebetween.
Summary of the invention
The object of the present invention is to provide a kind of improved bellows, this pipe has high rigidity to the pressure that radially is applied to bellows, and having high flexible for crooked ripple pipe on the direction of intersecting with its longitudinal axis line, this bellows also should have as far as possible little weight simultaneously.This little weight bellows makes only needs a small amount of plastics in the preparation, and can be convenient to operation when laying bellows.
This purpose realizes by the bellows of claim 1.Dependent claims relates to favourable scheme of the present invention.
The bellows of being made by thermoplastic of the present invention comprises interior pipe and the outer tube in wave shape that combines with it, the profile of this outer tube comprises with first average diameter first section, have second section of second average diameter and place therebetween sidewall (Flanken), this second average diameter is greater than first average diameter, and this sidewall links to each other first section adjacent with each second section.This first section can be described as trough; Comprise in abutting connection with this second section of sidewall and can be described as crest.
By the present invention, second section-be the top-not only in tangent direction of crest, and bellows vertically, all be crooked, protruding side can be outwards or is inside.Second section bellows longitudinally the radius of curvature of curved section preferably less than the external diameter of bellows, particularly less than 1/6 or 1/12 of the external diameter of bellows.The centre of curvature of second section curved section on bellows is vertical is positioned at the wall of pipe approximately or in its scope, then is particularly preferred.
By this structure of crest, realized having high rigidity, because can reduce the resistance of bellows bending by convex for the pressure that radially puts on bellows.Simultaneously, also increased flexible for crooked bellows on the direction of intersecting with the bellows longitudinal axis.Because the cause of the convex of crest, so, under bent state, can extend by the extension of curved section with little energy consumption in the pulling force side that is subjected to of bellows, and can be easy to shorten by the further compression of curved section on the pressure side.By this favourable mechanical property, the result can form thin wall, so that bellows of the present invention is obviously lighter than common bellows.
Particularly advantageously by the present invention be, from the longitudinal cross-section of bellows, second section cross section that always has waveform, wherein at least one protruding side inwardly is, and at least two protruding sides are outside.Because this section is easy to elongate or shorten, therefore, bellows can be easy to bending, can not reduce the rigidity of bellows for radial pressure simultaneously again.Second section in wave shape can respectively have at least two crests and at least one trough, but especially preferably three crests and two troughs.
By the present invention, also advantageously, second section-be crest the top-and the sidewall of each adjacency between transition zone also curved section is arranged on vertically at bellows, and the radius of curvature of this curved section preferably less than second section-promptly the top of this crest-radius of curvature.First section-be trough-and the sidewall of each adjacency between transition zone also be kindred circumstances, and the radius of curvature of this transition zone also Ying Gengxiao is a little, not weaken the connection between this zone middle external tube and the interior pipe.
In order further to save material, according to the present invention, also advantageously, bellows first section-be trough-axial area in wall less than second section-be crest the top-wall thickness and the wall thickness sum of the interior pipe in the axial area of this crest.Particularly advantageously be, bellows first section-be trough-axial area in wall thickness be this and about 90%.
In addition, according to the present invention, what also can help saving material is, the sidewall radially outward becomes thinner, particularly from abutting connection with first section sidewall up in abutting connection with second section sidewall attenuation 20-30% at least.
Press another aspect of the present invention, that the profile of outer tube can partly or entirely be is parabola shaped, cosine-shaped and/or index deltoid.That this outer surface that is interpreted as outer tube especially is on cross section is parabola shaped, cosine-shaped and/or index deltoid, and this curve can use parabolic function, cosine function and/or exponential function to describe.The parameter of the profile of outer tube-Yi respective function select-can have the high rigidity of the radial pressure on the bellows and have high flexible for crooked bellows on the direction of intersecting with the bellows longitudinal axis.
Second section-be crest the top-and the sidewall of each adjacency between respectively have-as mentioned above-have second transition zone of curved section on vertically at bellows.Correspondingly, first section-be trough-and the sidewall of each adjacency between also respectively have first transition zone that has curved section at bellows on vertically.
In first scheme, second section individually or with each second transition zone, can be corresponding to the shape of parabolic function, cosine function and/or exponential function.In alternative plan, second section can be corresponding to the shape of parabolic function, cosine function and/or exponential function with each second transition zone and part or all of sidewall.
For making outer tube shape be symmetric figure about crest and trough, first section can be individually or with each first transition zone corresponding to shape along corresponding parabolic function, cosine function and/or the exponential function that longitudinal axis showed of bellows.In another program, first section can with each first transition zone and partly or entirely sidewall corresponding to shape along corresponding parabolic function, cosine function and/or the exponential function that longitudinal axis showed of bellows.
Oneself shows that the symmetry properties profile of outer tube may be undesirable, because the radius of curvature of first transition zone should be less than the radius of curvature of second transition zone, not weaken outer tube and interior pipe being connected in this zone concerning some is used.Therefore can produce compression (gestaucht) and/or be out of shape along the shape of corresponding parabolic function, cosine function and/or the exponential function that longitudinal axis showed of bellows.
The profile of outer tube can have those contemplated system of coordinates that parabolic function, cosine function and/or exponential function relate to.The initial point of contemplated system of coordinates can be positioned at second section maximum of points-be the top of crest, and promptly second section has maximum diameter in this maximum of points.The x-direction can be parallel to the vertical of bellows, and the y-direction is parallel to the horizontal of bellows.
In one embodiment of the invention, parabolic function is corresponding to the function y=-α of containing parameter α and m | x
m|.
Be the scale (Skalierung) that the parameter that occurs below is provided, can be with x-value and y-value standardization (normiert) to value A, this value A corresponding between second section the two adjacent maximum of points-promptly between the top at two adjacent wave peaks-spacing.
To parabola shaped profile, parameter alpha can be arithmetic number, and particularly 1-50, especially 2-20 especially are the numbers between the 5-10.To parabola shaped profile, parameter m can should be positive integer, particularly 2-10, the especially 2-4 greater than 1 mutually, especially is m=2 or m=3.
In yet another embodiment of the present invention, cosine function can be corresponding to the function y=cos (α x) of containing parameter α and m
m-1.In addition, the function y=|cos (α x) of also available containing parameter α of cosine function and m
m|-1 expression.
To the cosine-shaped profile, parameter alpha can be arithmetic number, and particularly 1-20, especially 3-10 especially are the numbers between the 4-8.To the cosine-shaped profile, parameter m can be corresponding to arithmetic number, and particularly 1-10, the especially number between the 1-4 especially are m=1 or m=2.
If outer tube has index shape profile, then in another program of the present invention, exponential function is corresponding to the function of containing parameter α and m:
To index shape profile, parameter alpha can be arithmetic number, and particularly 1-100, especially 5-80 especially are the numbers between the 10-50.To index shape profile, parameter m can be corresponding to positive integer, and particularly 1-10, the especially number between the 1-5 especially are m=2 or m=4.
Press another aspect of the present invention, bellows vertically on, the profile of outer tube to small part is thread-shaped or spirality around interior pipe, is to be thread-shaped or spirality around the crest of interior pipe periphery and vertical curve of trough promptly, and not closed.Thus, have to the high rigidity of the radial pressure on the bellows and for crooked ripple pipe crisscross and have high flexible with the bellows longitudinal axis.
Description of drawings
Fig. 1 illustrates the bellows of being made by thermoplastic of the present invention;
Fig. 2 illustrates the longitudinal section in each crest district of the bellows of one embodiment of the invention;
Fig. 3 illustrates the longitudinal section in each crest district of the bellows of another embodiment of the present invention;
Fig. 4 illustrates two kinds of parabola shaped profiles of outer tube of the present invention;
Fig. 5 illustrates two kinds of cosine-shaped profiles of outer tube of the present invention;
Fig. 6 illustrates two kinds of index shape profiles of outer tube of the present invention;
Fig. 7 illustrates the longitudinal section in each crest district of the bellows with parabola shaped outer tube of one embodiment of the invention;
Fig. 8 illustrates the longitudinal section in 2 crest districts of the bellows with parabola shaped outer tube of one embodiment of the invention;
Fig. 9 illustrates the longitudinal section in each crest district of the bellows with cosine-shaped outer tube of one embodiment of the invention;
Figure 10 illustrates the longitudinal section in 2 crest districts of the bellows with cosine-shaped outer tube of one embodiment of the invention.
Embodiment
Fig. 1 illustrates the plastic tube that is specially adapted to the waste water tunnel system 1 with outer wall in wave shape and smooth inner wall.This plastic tube 1 preferably has sleeve or joint 9 to be connected with other plastic tube, and this joint 9 is by packing ring 10 sealings.10 districts can be provided with reinforcing band 11 at packing ring, leak at place, packing ring 10 districts to prevent joint 9.
It is d that Fig. 2 illustrates internal diameter of the present invention
1The longitudinal section in crest district of bellows.Outer tube has trough or first section 4 and crest alternately, the top that crest is a crest by two side 6 and second section 5--form.Second section 5 bellows vertically with radius of curvature R
3(based on the outer surface of outer tube) bending, this radius of curvature is about the outside diameter d of bellows
e1/18.Radius of curvature R
3Approximately corresponding to the high e of crest
c, in other words, be about outside diameter of bel d
eAnd inner diameter d
iBetween the difference 1/2.So this flexural center point is positioned on the inner tubal wall approximately.
By embodiment shown in Figure 2, the top that second section 5-is crest-and the sidewall 6 of each adjacency between transition zone curved section is also arranged, this curved section at bellows vertically based on outer tube outer surface with curvature half through R
1Crooked.On the contrary, first section-be that trough-and each is in abutting connection with the radius of curvature R of the transition zone between the sidewall
2Only be 1/2 R
1
For saving the material of preparation bellows, press Fig. 2, bellows first section 4-be trough-axial area wall e
4Wall thickness e less than second section
6The thick e of inner tubal wall with the crest axial area
5And (e
4＜e
5+ e
6).Bellows the wall of first section 4 axial area preferably only be about this and 90%.
In addition, sidewall 6 radially outward attenuation also can realize material saving of the present invention.In the embodiment of Fig. 2, by in abutting connection with first section sidewall up to sidewall attenuation about 30% gradually in abutting connection with second section.
Fig. 3 illustrates another embodiment of the present invention, and in this example, second section 5 vertically have a cross section in wave shape in bellows.In the embodiment shown, form by 3 crests 12 and 2 troughs 13 for second section 5.But also can form, or form for second section by 4 crests and 3 troughs by 2 crests and 1 trough.When bellows is crooked, alleviated second section 5 elongation and shortening in wave shape greatly by " accordion effect (Ziehharmonika Effekt) ", do not reduce the rigidity that radial pressure had on the bellows simultaneously.
Second section crest and trough in wave shape on Fig. 3 respectively have about 75 ° direction transformation, are mathematical hogging bending up to mathematical positive curve commutation.But also can only about 30 ° direction transformation.About 120 ° of especially preferably about 50-, especially 60-90 ° direction transformation.
The wall thickness e that second section 5 waveform is also available second section
6To the height difference e between crest 12 and the trough 13
7Description recently.In the embodiment shown in fig. 3, e
7/ e
6Ratio be about 2, but should be than also can be 1.3-5, especially 1.5-3.
By the present invention on the other hand, that the profile of outer tube 3 can be is parabola shaped, cosine-shaped and/or index shape.Should so understand especially, the outer surface 14 of outer tube 3 is parabola shaped curve (corresponding to Fig. 7 and Fig. 8) in cross section.Perhaps, or (kumulativ) in combination, this cross section also can be cosine-shaped and/or index deltoid.The cosine-shaped curve of cross section is shown in Fig. 9 and Figure 10.
The initial point U of those contemplated system of coordinates that parabolic function, cosine function and/or exponential function are related locates at second section maximum of points P (top of crest), i.e. this second section diameter (see figure 7) that has maximum at the maximum of points place.The x-direction can be parallel to vertical L of bellows, and the y-direction is parallel to the horizontal Q of bellows.
For the scale of the parameter that occurs below is provided, can be with x-value and the y-value value of being normalized into A, this value A corresponding to the top at two adjacent wave peaks of second section two adjacent maximum of points-promptly-between the spacing (see figure 8).
In the solution of the present invention illustrated in fig. 4, parabolic function is corresponding to the function y=-α of containing parameter α and m | x
m|, parameter shown in it is first curve of α=5 and m=2 and second curve that parameter is α=10 and m=3.But spell out, parameter alpha is arithmetic number, particularly 1-50, especially 2-20 arbitrarily among the present invention, is more preferably the number between the 5-10.Parameter m can be more preferably m=2 or m=3 corresponding to greater than 1 positive integer arbitrarily, particularly 2-10, the especially number between the 2-4 among the present invention.
In the solution of the present invention illustrated in fig. 5, the cosine function function y=cos (α x) of containing parameter α and m
m-1 expression.In addition, the function y=|cos (α x) of also available containing parameter α of cosine function and m
m|-1 expression.The parameter of first curve is α=4 and m=1.The parameter of second curve is α=8 and m=2.Also will spell out, parameter alpha is arithmetic number, particularly 1-20, especially 3-10 arbitrarily among the present invention, is more preferably the number between the 4-8.Parameter m can be more preferably m=1 or m=2 corresponding to arithmetic number, particularly 1-10, the especially number between the 1-4 arbitrarily among the present invention.
In another program of the present invention, exponential function is corresponding to the function of containing parameter α and m:
Parameter shown in Figure 6 is first curve of α=10 and m=2 and second curve that parameter is α=50 and m=4.But spell out, parameter alpha is arithmetic number, particularly 1-100, especially 5-80 arbitrarily among the present invention, is more preferably the number between the 10-50.Parameter m can be more preferably m=2 or m=4 corresponding to arithmetic number, particularly 1-10, the especially number between the 1-5 arbitrarily among the present invention.
As shown in Figure 7, top that second section 5-is crest-and the sidewall 6 of each adjacency between respectively have second transition zone 8 that on bellows 1 vertical L, has curved section.Correspondingly, first section 4--be trough-and the sidewall 6 of each adjacency between, also respectively have first transition zone 7 that on bellows 1 vertical L, has curved section.
In first scheme, second section 5 is individually, or with each second transition zone 8, can be corresponding to the shape of above-mentioned parabolic function, cosine function and/or exponential function.In alternative plan, second section 5 can be corresponding to the shape of parabolic function, cosine function and/or exponential function with each second transition zone 8 and part or all of sidewall 6.
For making outer tube be symmetry properties profile (see figure 10) about crest and trough, first section 4 can be individually, or with each first transition zone 7, corresponding to the shape of the corresponding parabolic function, cosine function and/or the exponential function that show along the longitudinal axis L of bellows 1.In another program, first section 4 can be with each first transition zone 7 and the shape of part or all of sidewall 6 corresponding to the corresponding parabolic function, cosine function and/or the exponential function that show along the longitudinal axis L of bellows 1.In contrast, in the scheme shown in Fig. 8, produce compression and/or distortion along the shape of corresponding parabolic function, cosine function and/or the exponential function that longitudinal axis showed of bellows.
Show that bellows of the present invention not only has the Gao Gang to the radial pressure on the bellows The property and have high flexible for Curved Corrugated pipe on crisscross with longitudinal axis, and with often With bellows compare, also have simultaneously littler weight. Thereby, when it is made, can subtract Lack the requirement of plastics, and when laying, can be convenient to the operation of this bellows.
Claims (36)
1. a bellows of making by thermoplastic (1), the outer tube in wave shape (3) that this bellows comprises interior pipe (2) and combines with it, the profile of its middle external tube comprises first section (4) with first average diameter, have second section (5) of second average diameter and place therebetween sidewall (6), described second average diameter is greater than first average diameter, second section (5) that described sidewall is adjacent with each with first section (4) link to each other, it is characterized in that described second section (5) vertically respectively have at least one buckled zone bellows.
2. the bellows of claim 1 (1) is characterized in that, described second section (5) are in the longitudinal bending of bellows, outside its protruding side direction.
3. the bellows of claim 1 (1) is characterized in that, described second section (5) are in the longitudinal bending of bellows, in its protruding side direction.
4. the bellows (1) of one of aforesaid right requirement is characterized in that, the radius of curvature (R of described second section (5) curved section on bellows is vertical
3) clear and definite external diameter (d less than bellows
e), particularly less than the external diameter (d of bellows
e) 1/6, especially less than the external diameter (d of bellows
e) 1/12.
5. the bellows (1) of one of aforesaid right requirement is characterized in that, the radius of curvature (R of described second section (5) curved section on bellows is vertical
3) approximately corresponding to outside diameter of bel (d
e) and inside diameter of bel (d
i) difference 1/2.
6. claim 1 or 2 bellows (1) is characterized in that, described second section (5) are positioned at the wall of pipe (2) or in its scope approximately at bellows curved portions central point on vertically.
7. claim 1 or 2 bellows (1) is characterized in that second section (5) respectively have cross section in wave shape, and wherein at least one protruding side (13) is inside, and at least two protruding sides (12) are outside.
8. the bellows of claim 7 (1) is characterized in that, second section (5) in wave shape have two inside protruding sides (13) and three outside protruding sides (12).
9. the bellows (1) of one of aforesaid right requirement is characterized in that, is respectively having second transition zone (8) that has curved section on bellows is vertical between the sidewall (6) of second section (5) and each adjacency.
10. the bellows (1) of one of aforesaid right requirement is characterized in that the radius of curvature (R of second transition zone (8)
1) greater than the external diameter (d of bellows (1)
e) and the internal diameter (d of bellows (1)
i) difference 1/8, particularly greater than this difference 1/6.
11. the bellows (1) of one of aforesaid right requirement is characterized in that the radius of curvature (R of second transition zone (8)
1) be about the external diameter (d of bellows (1)
e) and the internal diameter (d of bellows (1)
i) difference 1/6, particularly be about 1/4 of this difference.
12. the bellows (1) of one of aforesaid right requirement is characterized in that, is respectively having first transition zone (7) that has curved section on bellows is vertical, wherein its radius of curvature (R between the sidewall (6) of first section (5) and each adjacency
2) be about second transition zone (8) at the radius of curvature (R of bellows on vertically
1) 1/2.
13. the bellows (1) of one of aforesaid right requirement is characterized in that the wall of the wall of second section (5) or sidewall (6) is thicker than the wall of interior pipe (2) in second section (5) axial area.
14. the bellows (1) of one of aforesaid right requirement is characterized in that the wall (e of bellows (1) in first section (4) axial area
4) less than the wall thickness (e of second section (5)
6) and the wall thickness (e of interior pipe (2) in the axial area of second section (5)
5) and, particularly be about this and 90%.
15. the bellows (1) that aforesaid right one of requires is characterized in that, the axial area of the crest of forming by the sidewall (6) of second section (5) and two adjacency be about bellows external diameter 1/10,1/12-1/8 particularly.
16. the bellows (1) that aforesaid right one of requires is characterized in that, the spacing of two adjacent crests that each is made up of second section (5) and two adjacent sidewalls (6) is about 2 times of crest height of wave, particularly 1.5-2.5 times.
17. the bellows (1) of one of aforesaid right requirement is characterized in that sidewall (6) radially outward becomes thinner, particularly the sidewall in abutting connection with first section (4) will be as thin as few 20-30% up to the sidewall in abutting connection with second section (5).
18. the bellows (1) that aforesaid right one of requires is characterized in that, sidewall (6) tilts with angle (W) with respect to the plane perpendicular to the axis of bellows.
19. the bellows (1) of one of aforesaid right requirement is characterized in that bellows (1) prepares by high density polyethylene (HDPE) or by polypropylene.
20. the bellows (1) that aforesaid right one of requires is characterized in that, that the profile of outer tube (3) partly or entirely is is parabola shaped, cosine-shaped and/or index shape.
21. the bellows of claim 20 (1), it is characterized in that, respectively having second transition zone (8) that has curved section at bellows on vertically between the sidewall (6) of second section (5) and each adjacency, wherein second section (5) are individually or with the shape of each second transition zone (8) corresponding to parabolic function, cosine function and/or exponential function.
22. the bellows of claim 20 (1), it is characterized in that, respectively having second transition zone (8) that has curved section at bellows on vertically between the sidewall (6) of second section (5) and each adjacency, wherein second section (5) are with each second transition zone (8) and part or all of sidewall (6) shape corresponding to parabolic function, cosine function and/or exponential function.
23. the bellows of one of claim 20-22 (1), it is characterized in that, the profile of outer tube (3) has the system of coordinates of an imagination of parabolic function, cosine function and/or exponential function, wherein the initial point of the system of coordinates of this imagination is located in the maximum of points (P) of second section (5), these second section (5) locate to have maximum diameter in maximum value (P), and the x-direction is parallel to the vertical of bellows (1), and the y-direction is parallel to the horizontal of bellows (1).
24. the bellows of claim 22 or 23 (1) is characterized in that, parabolic function is corresponding to the function y=-α of containing parameter α and m | x
m|.
25. the bellows of claim 24 (1) is characterized in that parameter alpha is corresponding to arithmetic number, 1-50 particularly, especially the number between the 2-20, wherein x-value and the y-value value of being normalized into A, A is corresponding to the spacing between the maximum of points (P) of two second section adjacent (5) for this value.
26. the bellows of claim 24 (1), it is characterized in that, parameter m corresponding to big 1 in positive integer, the number between the 2-10 particularly, especially m=2 or m=3, wherein x-value and the y-value value of being normalized into A, A is corresponding to the spacing between the maximum of points (P) of two second section adjacent (5) for this value.
27. the bellows of claim 22 or 23 (1) is characterized in that, cosine function is corresponding to the function y=cos (α x) of containing parameter α and m
m-1.
28. the bellows of claim 22 or 23 (1) is characterized in that, cosine function is corresponding to the function y=|cos (α x) of containing parameter α and m
m|-1.
29. the bellows of one of claim 27 or 28 (1) is characterized in that parameter alpha is corresponding to arithmetic number, 1-20 particularly, especially the number between the 3-10, wherein x-value and the y-value value of being normalized into A, A is corresponding to the spacing between the maximum of points (P) of two second section adjacent (5) for this value.
30. the bellows of one of claim 27 or 28 (1), it is characterized in that, parameter m is corresponding to arithmetic number, the number between the 1-10 particularly, especially m=1 or m=2, wherein x-value and the y-value value of being normalized into A, A is corresponding to the spacing between the maximum of points (P) of two second section adjacent (5) for this value.
31. the bellows of claim 22 or 23 (1) is characterized in that, exponential function is corresponding to the function of containing parameter α and m:
32. the bellows of claim 31 (1) is characterized in that, parameter alpha is an arithmetic number, 1-100 particularly, especially the number between the 10-50, wherein x-value and the y-value value of being normalized into A, A is corresponding to the spacing between the maximum of points (P) of two second section adjacent (5) for this value.
33. the bellows of claim 31 (1) is characterized in that parameter m is corresponding to positive integer, the number between the 1-10 particularly, especially m=2 or m=4, wherein x-value and the y-value value of being normalized into A, A is corresponding to the spacing between the maximum of points (P) of two second section adjacent (5) for this value.
34. the bellows of one of claim 21-33 (1), it is characterized in that, respectively having first transition zone (7) that has curved section at bellows on vertically between each sidewall (6) of first section (4) and each adjacency, wherein first section (4) individually or with each first transition zone (7) corresponding to shape along corresponding parabolic function, cosine function and/or the exponential function that longitudinal axis showed and/or compressed of bellows (1).
35. the bellows of one of claim 21-33 (1), it is characterized in that, respectively having first transition zone (7) that has curved section at bellows on vertically between each sidewall (6) of first section (4) and each adjacency, wherein first section (4) with each first transition zone (7) and part or all of sidewall (6) corresponding to shape along corresponding parabolic function, cosine function and/or the exponential function that longitudinal axis showed and/or compressed of bellows (1).
36. the bellows (1) that aforesaid right one of requires is characterized in that, bellows vertically on, profile to the small part of outer tube (3) is thread-shaped or spirality around interior pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610075775 CN101070934A (en) | 2006-05-09 | 2006-05-09 | Corrugated pipe made of thermoplastic plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610075775 CN101070934A (en) | 2006-05-09 | 2006-05-09 | Corrugated pipe made of thermoplastic plastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101070934A true CN101070934A (en) | 2007-11-14 |
Family
ID=38898284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610075775 Pending CN101070934A (en) | 2006-05-09 | 2006-05-09 | Corrugated pipe made of thermoplastic plastics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101070934A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315271A (en) * | 2014-10-20 | 2015-01-28 | 戴爱清 | Single-direction curved corrugated pipe |
| CN106015764A (en) * | 2016-07-20 | 2016-10-12 | 德清全能管业科技有限公司 | Corrugated pipe |
| CN108413143A (en) * | 2018-04-24 | 2018-08-17 | 中天电力光缆有限公司 | A kind of stainless steel tube and attaching method thereof that can quickly connect |
-
2006
- 2006-05-09 CN CN 200610075775 patent/CN101070934A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315271A (en) * | 2014-10-20 | 2015-01-28 | 戴爱清 | Single-direction curved corrugated pipe |
| CN106015764A (en) * | 2016-07-20 | 2016-10-12 | 德清全能管业科技有限公司 | Corrugated pipe |
| CN108413143A (en) * | 2018-04-24 | 2018-08-17 | 中天电力光缆有限公司 | A kind of stainless steel tube and attaching method thereof that can quickly connect |
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Application publication date: 20071114 |