CN208221800U - Spiral reinforced polypropylene bellows - Google Patents
Spiral reinforced polypropylene bellows Download PDFInfo
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- CN208221800U CN208221800U CN201820440832.9U CN201820440832U CN208221800U CN 208221800 U CN208221800 U CN 208221800U CN 201820440832 U CN201820440832 U CN 201820440832U CN 208221800 U CN208221800 U CN 208221800U
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Abstract
The utility model relates to bellows fields, in particular to a kind of spiral reinforced polypropylene bellows: it includes outer layer, enhancement layer and plastic-coated steel bar layer, outer layer includes outer layer wave crest and outer layer trough, the inner surface of outer layer wave crest is a helical form cavity, enhancement layer is located in helical form cavity, the sectional area of plastic-coated steel bar layer is the 14%~16% of enhancement layer sectional area, plastic-coated steel bar layer is helical form, there is accommodating cavity in enhancement layer, plastic-coated steel bar layer includes spiral and coating layer, and coating layer outer surface is fixedly connected with accommodating inner cavity surface；The utility model provides a kind of spiral reinforced polypropylene bellows, it is equipped in solid wave crest enhancement layer and enhancement layer in the outer layer wave crest of the bellows and is equipped with plastic-coated steel bar layer, not only make the bellows that there is more excellent compression strength but also spiral and polypropylene plastics to play humidification jointly, make the unstressed centrostigma of tubing, each position compressive property is uniform, substantially prolongs service life.
Description
Technical field
The utility model relates to bellows field, in particular to a kind of spiral reinforced polypropylene bellows.
Background technique
The tubing in the fields such as draining blowdown at present is generally steel plastic compount helical bellows and HDPE double-wall corrugated pipe, wherein
Steel plastic compount helical bellows have the shortcomings that as follows: 1, the cementability of steel and plastics is poor, and in process, steel band exists
Great internal stress, cause tubing outdoor placement after a certain period of time, because of the influence for the factors such as expand with heat and contract with cold, steel modeling occurs serious
Segregation phenomenon, to cause tubing after buried, ring stiffness degradation causes engineering accident；2, resistance to due to steel band
Corrosivity is poor, in production and work progress, easily causes steel band to corrode, so that destroying tubing causes engineering accident；3, it impacts
Performance is poor, and when by external impacts, steel modeling is easily layered steel-plastics composite pipe；4, anti-destructive is poor, is at tubing wave crest
Unicast peak structure, as long as being destroyed at wave crest by external force, aqueous or foreign matter will be intracavitary into wave, corrode in steel band and destruction
Layer ultimately causes the whole of tubing and destroys.
HDPE double-wall corrugated pipe haves the shortcomings that as follows: 1, being unicast peak structure at tubing wave crest, while ectonexine wall thickness
Relatively thin, shock resistance and anti-destructive are poor；2 unicast peak structure, tubing compressive property are poor because being at wave crest, therefore integral loop
Rigidity is lower, is usually no more than 8kN/m2, if you need to improve ring stiffness, then need that unit materials dosage, higher cost is significantly increased；3,
Production equipment investment is high, usually 8 times or more of screw thread ripple tubing equipment, while producing more heavy caliber more having limitation, makes
At high production cost；It is more than 1500mm tubing that diameter cannot be produced at present by technical restriction simultaneously.
Utility model content
The purpose of the utility model is to overcome disadvantage mentioned above, provide a kind of spiral reinforced polypropylene bellows, should
It is equipped in solid wave crest enhancement layer and enhancement layer in the outer layer wave crest of bellows and is equipped with plastic-coated steel bar layer, not only make the bellows
With more excellent compression strength, shock resistance is destructive and ring is flexible, and spiral and polypropylene plastics play increasing jointly
Use is pretended, makes the unstressed centrostigma of tubing, is more uniformly stressed, each position compressive property is uniform, substantially prolongs service life.
The utility model is realized in this way: a kind of spiral reinforced polypropylene bellows, it is characterised in that: the ripple
Pipe includes outer layer, enhancement layer and the plastic-coated steel bar layer being set in enhancement layer, and the outer layer includes alternateing setting and edge
The outer layer wave crest and outer layer trough that bellows axial direction helically extends, the inner surface of the outer layer wave crest are a helical form
Cavity, the enhancement layer is solid peak structure and extends spirally setting along bellows axial direction, and the enhancement layer is located at spiral shell
It revolves in shape cavity, the outer surface of the enhancement layer and the inner surface of outer layer wave crest are sticked fixed and enhancement layer inner surface and outer layer
The inner surface of trough is concordant, and the sectional area of the plastic-coated steel bar layer is the 14%~16% of enhancement layer sectional area, the Clad Steel
Muscle layer is helical form, the accommodating cavity for accommodating plastic-coated steel bar layer is equipped in the enhancement layer, the plastic-coated steel bar layer includes spiral shell
Line reinforcing bar and cladding are set to the coating layer of spiral periphery, the coating layer outer surface and the fixed company of accommodating inner cavity surface
It connects.
Preferably, the outer layer and enhancement layer are polypropylene layer, and the coating layer is grafted polyolefinic resin layer.
Preferably, the spiral is not less than 300MPa, elasticity not less than 450MPa, yield strength using tensile strength
Modulus is the spiral of 205000MPa~215000MPa, elongation percentage not less than 25%.
In order to further increase ring stiffness, the height of the outer layer wave crest is the 4.5%~5.5% of inside diameter of bel, institute
The screw pitch for stating bellows is the 11.5%~13.5% of inside diameter of bel, and the width of the outer layer wave crest is inside diameter of bel
5%~7%, the width of the outer layer trough is the 6.5%~8.5% of inside diameter of bel, and the width of the outer layer trough is outer
1.25~1.35 times of the width of layer wave crest, the angle of outer layer wave crest two sidewalls extension line is 20 °~24 °.
Preferably, the outer layer uses section to form for the linear profile spiral winding of zigzag shape, linear profile phase
The lap of adjacent side mutually it is melting adhered together.
For the prior art, the utility model is had the advantage that
(1) spiral reinforced polypropylene bellows provided by the utility model is equipped in the outer layer wave crest of the bellows
Plastic-coated steel bar layer is equipped in solid wave crest enhancement layer and enhancement layer, not only make the bellows have more excellent compression strength,
Shock resistance destructiveness and ring are flexible, and spiral and polypropylene plastics play humidification jointly, make the unstressed collection of tubing
Midpoint is more uniformly stressed, and each position compressive property is uniform, substantially prolongs service life；
(2) spiral reinforced polypropylene bellows provided by the utility model passes through setting enhancement layer and plastic-coated reinforcing bar
Layer makes tubing have more excellent ring stiffness, and ring stiffness is up to 24kN/m2More than；
(3) spiral reinforced polypropylene bellows provided by the utility model, plastic-coated steel bar layer include spiral with
And cladding is set to the coating layer of spiral periphery, and spiral surface is in shape of threads, and surface area is big, after surface plastic coating,
Composite effect is good between polypropylene enhancing wave crest, and synchronous material is good both when being expanded with heat and contract with cold by external environment influences, pole
The naturally occurring stress problem of steel plastic compount is overcome greatly, is avoided between reinforcing bar and polypropylene because the coefficient of expansion and contraction are different
Caused stress rupture problem enhances the collaboration resistance to compression effect and mutual protective effect of steel plastic compount；
(4) spiral reinforced polypropylene bellows provided by the utility model, the sectional area of plastic-coated steel bar layer are to reinforce
The 14%~16% of layer cross section product, as much as possible stress problem existing for reduction steel plastic compount, improve the enhancing effect of steel plastic compount
Fruit；
(5) spiral reinforced polypropylene bellows provided by the utility model, each layer are all made of the good material of compatibility
Matter, and it is compound through high-temperature fusion, it is ensured that and each layer is compound good, and tubing is made to have good structural behaviour, long service life；
(6) spiral reinforced polypropylene bellows provided by the utility model, ingenious in design, service performance is reliable, tool
There is vast market prospect.
Detailed description of the invention
The utility model is described in further detail in conjunction with the embodiments with reference to the accompanying drawings:
Fig. 1 is the structural schematic diagram of the utility model spiral reinforced polypropylene bellows；
Fig. 2 is the partial enlargement diagram of A in Fig. 1；
Fig. 3 is the three dimensional structure diagram of the utility model enhancement layer；
Fig. 4 is the three dimensional structure diagram of the utility model linear profile.
Symbol description in figure: 1, outer layer, 11, outer layer wave crest, 12, outer layer trough, 13, linear profile, 2, enhancement layer,
21, accommodating cavity, 3, plastic-coated steel bar layer, 31, spiral, 32, coating layer, the angle of ɑ, outer layer wave crest two sidewalls extension line, b1、
The width of outer layer wave crest, b2, outer layer trough width, d, inside diameter of bel, the height of h, outer layer wave crest, the spiral shell of p, bellows
Away from.
Specific embodiment
The content of the present invention is described in detail with specific embodiment with reference to the accompanying drawings of the specification:
It is as shown in Figs 1-4 a kind of spiral reinforced polypropylene bellows provided by the utility model, it is characterised in that:
The bellows includes outer layer 1, enhancement layer 2 and the plastic-coated steel bar layer 3 being set in enhancement layer 2, and the outer layer 1 includes mutually handing over
For setting and along outer layer wave crest 11 and outer layer trough 12 that bellows axial direction helically extends, the outer layer wave crest 11 it is interior
Surface is a helical form cavity, and the enhancement layer 2 is solid peak structure and extends spirally setting along bellows axial direction,
The enhancement layer 2 is located in helical form cavity, the outer surface of the enhancement layer 2 and the inner surface of outer layer wave crest 11 be sticked it is fixed and
The inner surface of enhancement layer 2 is concordant with the inner surface of outer layer trough 12, and the sectional area of the plastic-coated steel bar layer 3 is 2 section of enhancement layer
Long-pending 14%~16%, the plastic-coated steel bar layer 3 are helical form, are equipped in the enhancement layer 2 for accommodating plastic-coated steel bar layer 3
Accommodating cavity 21, the plastic-coated steel bar layer 3 include the coating layer 32 that spiral 31 and cladding are set to 31 periphery of spiral,
32 outer surface of coating layer is fixedly connected with 21 inner surface of accommodating cavity.
Preferably, the outer layer 1 and enhancement layer 2 are polypropylene layer, and the coating layer 32 is grafted polyolefinic resin
Layer.
Preferably, the spiral 31 is not less than 300MPa, bullet not less than 450MPa, yield strength using tensile strength
Property modulus be 205000MPa~215000MPa, elongation percentage be not less than 25% spiral.
As shown in Figure 1, the height h of the outer layer wave crest 11 is the 4.5%~5.5% of inside diameter of bel d, the bellows
Screw pitch p be inside diameter of bel d 11.5%~13.5%, the width b of the outer layer wave crest 111It is the 5% of inside diameter of bel d
~7%, the width b of the outer layer trough 122It is the 6.5%~8.5% of inside diameter of bel d, the width b of the outer layer trough 122
For the width b of outer layer wave crest 1111.25~1.35 times, the angle ɑ of the 11 two sidewalls extension line of outer layer wave crest is 20 °~
24°。
As Figure 1 and Figure 4, the outer layer 1 uses section to form for 13 spiral winding of linear profile of zigzag shape, directly
The lap of linear 13 adjacent edge of profile mutually it is melting adhered together.
Table 1: the main performance contrast table of the utility model spiral reinforced polypropylene bellows and other bellowss
From table 1 it follows that the spiral reinforced polypropylene bellows of the utility model, ring stiffness, impact property,
Ring flexibility and tubing weight are substantially better than existing tubing.
Table 2: different wave crest angles, crest height, peaks and troughs width compare the influence of pipe workpiece quality and cost
Note: 1, above by taking DN800 pipe as an example；
2, peak/valley pressure-resisting ratio is the ratio between tubing wave crest ring stiffness and tubing trough ring stiffness, to examine tubing whole
Whether compressive property is uniform, avoids compressive property difference excessive, and the two illustrates that compressive property is more uneven compared to bigger, on the contrary
Then compressive property is more evenly；
3, the cost coefficient the high, illustrates that tubing cost is higher, on the contrary then lower；
It 4, is relatively above the conclusion made under the premise of consistent based on other three projects to any one purpose.
Above-mentioned specific embodiment is only explained in detail the technical solution of the utility model, and the utility model is not
It is only limited only to above-described embodiment, all any improvement or replacement according to the utility model principle should all be practical new at this
Within the protection scope of type.
Claims (5)
1. a kind of spiral reinforced polypropylene bellows, it is characterised in that: the bellows include outer layer (1), enhancement layer (2) with
And it is set to the plastic-coated steel bar layer (3) in enhancement layer (2), the outer layer (1) includes alternateing setting and along bellows axial direction
The outer layer wave crest (11) and outer layer trough (12) that direction helically extends, the inner surface of the outer layer wave crest (11) are a spiral
Shape cavity, the enhancement layer (2) are solid peak structure and extend spirally setting, the enhancement layer along bellows axial direction
(2) it is located in helical form cavity, the outer surface of the enhancement layer (2) and the inner surface of outer layer wave crest (11) are sticked fixed and reinforce
The inner surface of layer (2) is concordant with the inner surface of outer layer trough (12), and the sectional area of the plastic-coated steel bar layer (3) is enhancement layer (2)
The 14%~16% of sectional area, the plastic-coated steel bar layer (3) are helical form, are equipped in the enhancement layer (2) for accommodating plastic-coated
The accommodating cavity (21) of steel bar layer (3), the plastic-coated steel bar layer (3) include that spiral (31) and cladding are set to spiral
(31) coating layer (32) of periphery, coating layer (32) outer surface are fixedly connected with accommodating cavity (21) inner surface.
2. spiral reinforced polypropylene bellows according to claim 1, it is characterised in that: the outer layer (1) and add
Strong layer (2) is polypropylene layer, and the coating layer (32) is grafted polyolefinic resin layer.
3. spiral reinforced polypropylene bellows according to claim 1, it is characterised in that: the spiral (31)
Use tensile strength not less than 450MPa, yield strength not less than 300MPa, elasticity modulus for 205000MPa~215000MPa,
Elongation percentage is not less than 25% spiral.
4. spiral reinforced polypropylene bellows according to claim 1, it is characterised in that: the outer layer wave crest (11)
Height (h) be the 4.5%~5.5% of inside diameter of bel (d), the screw pitch (p) of the bellows is inside diameter of bel (d)
11.5%~13.5%, the width (b of the outer layer wave crest (11)1) it is the 5%~7% of inside diameter of bel (d), the outer layer wave
Width (the b of paddy (12)2) it is the 6.5%~8.5% of inside diameter of bel (d), the width (b of the outer layer trough (12)2) it is outer layer
Width (the b of wave crest (11)1) 1.25~1.35 times, the angle (ɑ) of outer layer wave crest (11) two sidewalls extension line is 20 °~
24°。
5. spiral reinforced polypropylene bellows according to claim 1, it is characterised in that: the outer layer (1) uses
Section is that linear profile (13) spiral winding of zigzag shape forms, and the lap of linear profile (13) adjacent edge is mutually molten
Melt and bonds together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820440832.9U CN208221800U (en) | 2018-03-28 | 2018-03-28 | Spiral reinforced polypropylene bellows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820440832.9U CN208221800U (en) | 2018-03-28 | 2018-03-28 | Spiral reinforced polypropylene bellows |
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| Publication Number | Publication Date |
|---|---|
| CN208221800U true CN208221800U (en) | 2018-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820440832.9U Active CN208221800U (en) | 2018-03-28 | 2018-03-28 | Spiral reinforced polypropylene bellows |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108407345A (en) * | 2018-03-28 | 2018-08-17 | 康命源（安徽）塑料科技发展股份有限公司 | Spiral reinforced polypropylene bellows and its manufacturing method |
-
2018
- 2018-03-28 CN CN201820440832.9U patent/CN208221800U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108407345A (en) * | 2018-03-28 | 2018-08-17 | 康命源（安徽）塑料科技发展股份有限公司 | Spiral reinforced polypropylene bellows and its manufacturing method |
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