CN211475112U

CN211475112U - Double-wall corrugated pipe

Info

Publication number: CN211475112U
Application number: CN202020007927.9U
Authority: CN
Inventors: 张菲
Original assignee: Jiangsu Endong Plastic Technology Co ltd
Current assignee: Jiangsu Endong Plastic Technology Co ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-09-11
Anticipated expiration: 2030-01-03

Abstract

The utility model relates to a double-wall corrugated pipe, which comprises a hollow inner pipe layer and a corrugated outer pipe layer, wherein the surface of the outer pipe layer is provided with spaced outer wave crests, inner wave crests concentric with the outer wave crests are arranged in the outer wave crests, reinforcing ribs are arranged between the inner wall of the outer wave crests and the outer wall of the inner wave crests, enhancement layer wave crests are arranged in the wave troughs between the adjacent outer wave crests, metal reinforcing ribs are embedded in the enhancement layer wave crests, a heat preservation layer is arranged between the outer pipe layer and the inner pipe layer, the heat preservation layer is of two semicircular structures and is coated on the outer surface of the inner pipe layer, two sides of any semicircular structure are provided with outer buckles, the other semicircular structure is correspondingly provided with inner buckles, the two semicircular structures form a clamping fit when coating the inner pipe layer, the structure of the double-wall corrugated pipe is improved, and the heat preservation layer is added between the inner pipe, improving the adaptability of the device to low-temperature environment.

Description

Double-wall corrugated pipe

Technical Field

The utility model relates to a can be used to municipal works/drainage/water supply/agricultural irrigation etc. purpose's water pipe, concretely relates to double-walled bellows.

Background

The double-wall corrugated pipe is a novel pipe with an outer wall with an annular structure and a smooth inner wall, has been greatly popularized and applied in developed countries such as Europe and America due to excellent performance and relatively economic manufacturing cost, and is mainly applied to large-scale water delivery, water supply, drainage, pollution discharge, exhaust, subway ventilation, mine ventilation, farmland irrigation and the like with the working pressure of below 0.6 MPa.

The double-wall corrugated pipe is a novel light pipe made of high-density polyethylene, has the characteristics of light weight, high pressure resistance, good toughness, fast construction, long service life and the like, and has an excellent pipe wall structure design, so that the cost is greatly reduced compared with pipes of other structures.

The double-wall corrugated pipe has excellent chemical stability, aging resistance and environmental stress cracking resistance. HDPE double-wall corrugated pipe produced by using the HDPE double-wall corrugated pipe as a raw material belongs to flexible pipes. The outer wall is of an annular corrugated structure, so that the annular rigidity of the pipe is greatly enhanced, and the resistance of the pipeline to soil load is enhanced.

In certain geographical locations where settlement is a frequent occurrence, the corrugated pipe is installed at a deeper location, requiring better toughness and rigidity of the double-walled corrugated pipe to resist the pressure exerted by the soil.

In cold areas, accumulated water is easy to freeze, and the drainage effect is affected.

SUMMERY OF THE UTILITY MODEL

To the not enough of prior art existence, the utility model aims to provide a double-walled bellows.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a double-wall corrugated pipe comprises a hollow inner pipe layer and a corrugated outer pipe layer, wherein spaced outer wave crests are arranged on the surface of the outer pipe layer, inner wave crests concentric with the outer wave crests are arranged in the outer wave crests, reinforcing ribs are arranged between the inner wall of each outer wave crest and the outer wall of each inner wave crest, enhancement layer wave crests are arranged in wave troughs between adjacent outer wave crests, metal reinforcing ribs are embedded in the enhancement layer wave crests, a heat insulation layer is arranged between the outer pipe layer and the inner pipe layer, the heat insulation layer is of two semicircular structures and is wrapped on the outer surface of the inner pipe layer, outer buckles are arranged on two sides of any one semicircular structure, inner buckles are correspondingly arranged on the other semicircular structure, and the two semicircular structures form clamping fit when wrapping the inner pipe layer.

The reinforcement layer peaks have a ring stiffness rating that is higher than a ring stiffness rating of the inner and outer tubular layers.

The surface of the outer pipe layer is corrugated to form at least one spiral line, and cavities are formed between the outer wave peak and the surface of the outer pipe layer and between the inner wave peak and the surface of the outer pipe layer.

The height of the outer wave peak is greater than or equal to that of the inner wave peak.

The reinforcing ribs are connected to the middle parts of the inner wave crest and the outer wave crest.

The reinforcing rib, the outer wave peak and the inner wave peak are integrally formed.

The height of the reinforcing layer wave peak is equal to or less than the height of the inner wave peak.

The outer surface of the inner pipe layer is of a concave-convex structure.

And a gap is arranged between the convex part in the concave-convex structure and the outer wall of the inner pipe layer.

The utility model has the advantages that: the structure to the double-walled bellows improves, increases the heat preservation between inner tube layer and outer tube layer, improves its adaptability to low temperature environment, sets up interior crest and the strengthening rib that has the additional strengthening including for support outer crest, promote the intensity, toughness and the shock resistance of double-walled bellows, be applicable to more abominable environment, and be equipped with the enhancement layer crest in the trough, and at the embedded metal strengthening rib that covers of establishing of enhancement layer crest, promote the impact property and the ring flexibility of double-walled bellows.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged schematic view of a point a in fig. 1.

Figure 3 is the cross-sectional schematic view of the heat preservation layer of the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

As shown in the figure, the utility model provides a double-walled bellows, it includes that hollow inner tube layer 4 and surface are corrugated outer tube layer 1, outer tube layer surface has the outer crest of spaced, be equipped with in outer crest 11 with outer concentric interior crest 13 of crest, be equipped with strengthening rib 12 between the inner wall of outer crest and the outer wall of interior crest for set up interior crest and the strengthening rib that has the additional strengthening including, be used for supporting outer crest, promote intensity, toughness and the shock resistance of double-walled bellows, be applicable to more abominable environment.

The wave trough between adjacent outer wave peaks is internally provided with an enhancement layer wave peak 2, and a metal reinforcing rib 21 is embedded in the enhancement layer wave peak.

And a heat insulation layer 3 is arranged between the outer pipe layer and the inner pipe layer, the heat insulation layer is of two semicircular structures and is coated on the outer surface of the inner pipe layer, outer buckles 32 are arranged on two sides of any one semicircular structure, an inner buckle 31 is correspondingly arranged on the other semicircular structure, and the outer buckle and the inner buckle form clamping fit when the inner pipe layer is coated.

The internal surface of heat preservation has the radian the same with interior pipe layer surface, and the heat preservation combines fixedly with interior pipe layer with two semicircle structures parcel interior pipe layer and with the mode of negative and positive buckle, and outer pipe layer then wraps up the outer wall of heat preservation in addition, utilizes interior outer pipe layer to wrap whole heat preservation, plays fine heat preservation effect.

The ring stiffness is a comprehensive parameter of the external pressure load resistance of the plastic buried drain pipe, and the selection of the ring stiffness is one of the keys in the design in order to ensure the safe operation of the double-wall corrugated pipe under the external pressure load. If the loop stiffness of the tubing is too low, the tubing may deform excessively or buckle destabilization may occur. On the contrary, if the ring stiffness is selected too high, an excessively large section moment of inertia is inevitably adopted, which results in too much material and high cost.

Meanwhile, the wave crests of the enhancement layer are connected with two adjacent external wave crests, so that the strength, toughness and impact resistance of the double-wall corrugated pipe are improved, and the strength, toughness and impact resistance of the double-wall corrugated pipe are further improved by embedding the metal reinforcing ribs inside the double-wall corrugated pipe.

The surface of the outer pipe layer is corrugated to form at least one spiral line, and cavities are formed between the outer wave peak and the surface of the outer pipe layer and between the inner wave peak and the surface of the outer pipe layer. The outer wall adopts a spiral ripple type, so that the process is simple, the product ring has high rigidity, the weight is light, the quality is reliable, and the flexibility is good.

The height of the outer wave peak is greater than or equal to that of the inner wave peak. The height of the inner wave peak is preferably 1/2 lower than that of the outer wave peak, and the height of the inner wave peak is limited to be less than or equal to half of the height of the outer wave peak, so that the phenomenon that the inner wave peak is too high, occupies too much space in the outer wave peak and affects the ring flexibility of the double-wall corrugated pipe is avoided.

The reinforcing ribs are connected to the middle parts of the inner wave crest and the outer wave crest. Support including through the strengthening rib between crest and the outer crest, after outer crest atress, transmit to the crest through the strengthening rib, undertake the pressure that comes from the external world jointly, avoid pressure too big, lead to outer pipe layer to take place deformation.

And the middle part can better bear the pressure on the outer wave peak and evenly distribute the pressure on the inner wave peak.

The shape of the reinforcing rib can be designed according to requirements.

The pressure on two sides of the outer wave peak can be shared by the inner wave peak and the reinforcing ribs which are arranged in the outer wave peak, the pressure transmitted to the inner pipe layer is reduced, the toughness and the impact resistance are improved, and the corrugated pipe is not easy to deform.

The reinforcing rib, the outer wave peak and the inner wave peak are integrally formed, so that the rigidity and the structural strength can be better improved.

The height of the wave crest of the enhancement layer is equal to or less than that of the inner wave crest, so that the toughness is improved.

The outer surface of the inner tube layer is in a concave-convex structure 41. The bending rigidity of the double-wall corrugated pipe is reduced by utilizing a concave-convex structure.

Gaps 42 are arranged between the convex parts in the concave-convex structure and the outer wall of the inner pipe layer, so that the bending rigidity of the inner pipe layer is reduced.

The examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of the present invention.

Claims

1. A double-walled corrugated pipe, characterized by: the corrugated pipe comprises a hollow inner pipe layer and an outer pipe layer with a corrugated surface, wherein spaced outer wave crests are arranged on the surface of the outer pipe layer, inner wave crests concentric with the outer wave crests are arranged in the outer wave crests, reinforcing ribs are arranged between the inner wall of each outer wave crest and the outer wall of each inner wave crest, enhancement layer wave crests are arranged in wave troughs between adjacent outer wave crests, metal reinforcing ribs are embedded in the enhancement layer wave crests, a heat insulation layer is arranged between the outer pipe layer and the inner pipe layer, the heat insulation layer is of two semicircular structures and is wrapped on the outer surface of the inner pipe layer, outer buckles are arranged on two sides of any one semicircular structure, the other semicircular structure is correspondingly provided with an inner buckle, and the two semicircular structures are wrapped on the inner pipe layer to form clamping fit.

2. The double-walled corrugated pipe of claim 1, wherein: the reinforcement layer peaks have a ring stiffness rating that is higher than a ring stiffness rating of the inner and outer tubular layers.

3. The double-walled corrugated pipe of claim 1, wherein: the surface of the outer pipe layer is corrugated to form at least one spiral line, and cavities are formed between the outer wave peak and the surface of the outer pipe layer and between the inner wave peak and the surface of the outer pipe layer.

4. The double-walled corrugated pipe of claim 1 or 3, wherein: the height of the outer wave peak is greater than or equal to that of the inner wave peak.

5. The double-walled corrugated pipe of claim 4, wherein: the reinforcing ribs are connected to the middle parts of the inner wave crest and the outer wave crest.

6. The double-walled corrugated pipe of claim 1 or 3, wherein: the reinforcing rib, the outer wave peak and the inner wave peak are integrally formed.

7. The double-walled corrugated pipe of claim 1, wherein: the height of the reinforcing layer wave peak is equal to or less than the height of the inner wave peak.

8. The double-walled corrugated pipe of claim 1, wherein: the outer surface of the inner pipe layer is of a concave-convex structure.

9. The double-walled corrugated pipe of claim 8, wherein: and a gap is arranged between the convex part in the concave-convex structure and the outer wall of the inner pipe layer.