DSSP hollow square double-wall polyolefin reinforced anti-leakage pipe

Abstract

The utility model provides a DSSP hollow square double-wall polyolefin reinforced anti-leakage pipe, and relates to the field of composite pipelines. The DSSP hollow square double-layer-wall polyolefin reinforced anti-leakage pipe is formed by bonding a plurality of pipe section units, and is characterized in that the pipe wall of each pipe section unit comprises a trough part and a crest part, the trough parts and the crest parts are formed by a chord fiber PE layer, the trough parts extend in the axial direction of the composite pipe, and the crest parts are integrally formed at the two ends of the trough parts and extend in the radial direction of the composite pipe; the outer PE layer wraps the outer side of the string fiber PE layer, and the inner PE layer is arranged on the inner side of the string fiber PE layer; through the three-layer structure of the PE outer layer, the chord fiber PE layer and the PE inner layer, the composite pipe has the advantages of being high in rigidity and strength and not prone to deformation at high temperature, damage and breakage caused by abrasion are not prone to occurring, and the problem that in the prior art, a polyolefin pipeline is prone to deformation and damage under the impact condition is solved.

Description

Technical Field

[0001] The utility model relates to the field of composite pipes, in particular to a DSSP hollow square double-wall polyolefin reinforced anti-leakage pipe. Background Art

[0002] In modern industries, pipes are used everywhere. Polyolefin pipes (such as common plastics) have replaced traditional metal pipes and concrete pipes in many fields such as liquid medium transportation and cable protection due to their low cost, light weight and corrosion resistance.

[0003] However, the existing general polyolefin pipes have low stiffness and strength, and are easily deformed, damaged or even broken under impact or high temperature, and cannot meet the needs of complex industrial production sites. Basalt fiber reinforced polyolefin materials are materials that are further improved to improve the stiffness and strength of polyolefin materials. Compared with general polyolefin materials, basalt fiber reinforced polyolefin materials do improve stiffness and strength, and have better impact resistance, but their surface properties have some disadvantages, such as the surface is not wear-resistant, and the worn parts are difficult to repair and easily lead to further fracture. Therefore, the durability of pipes made directly from basalt fiber reinforced polyolefin materials is not ideal. Utility Model Content

[0004] The utility model provides a DSSP hollow square double-wall polyolefin reinforced anti-leakage pipe to solve the problems in the prior art that polyolefin pipes have low rigidity and strength, are easily deformed, damaged or even broken when subjected to impact or high temperature, and cannot adapt to the needs of complex industrial production sites.

[0005] The technical solution adopted by the utility model is:

[0006] DSSP hollow square double-wall polyolefin reinforced anti-leakage pipe is composed of multiple spiral pipe section units connected together. The pipe wall of any pipe section unit includes:

[0007] A trough portion and a crest portion formed by a black fiber PE layer, wherein the trough portion extends along the axial direction of the composite tube, and the crest portion is integrally formed at both ends of the trough portion and extends along the radial direction of the composite tube; and

[0008] A PE outer layer and a PE inner layer, wherein the PE outer layer is coated on the outer side of the black fiber PE layer, and the PE inner layer is arranged on the inner side of the black fiber PE layer.

[0009] Furthermore, a cavity is provided inside the trough portion and / or the peak portion.

[0010] Furthermore, there are multiple cavities inside the trough portion, and the cavities are spaced apart from each other.

[0011] Furthermore, the cross-sectional shape of the multiple cavities is square.

[0012] Furthermore, an inner steel wire is arranged at the crest portion adjacent to the PE inner layer, and the inner steel wire is spirally wound along the pipe wall of the composite pipe.

[0013] Furthermore, the number of the inner steel wires is two or more.

[0014] Furthermore, a PE bonding layer is provided between each pipe segment unit, and each pipe segment unit is bonded to form the composite pipe through the PE bonding layer.

[0015] Furthermore, a PE cap top layer is commonly provided on the outer sides of adjacent wave crests between adjacent pipe section units.

[0016] Furthermore, an outer steel wire is also arranged inside the top layer of the PE cap, and the outer steel wire is spirally wound along the pipe wall of the composite pipe.

[0017] Furthermore, the outer steel wire is arranged in the middle of adjacent wave crest portions.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model sets a three-layer structure of a PE outer layer, a black fiber PE layer, and a PE inner layer. On the one hand, the black fiber PE layer is used as the main body, so that the composite pipe has the advantages of high rigidity and high strength and is not easy to deform at high temperatures, which solves the problem that the polyolefin pipeline in the prior art has low rigidity and strength, and is easy to deform, damage or even break under impact; on the other hand, the PE layer is covered on the inner and outer sides, which utilizes the wear resistance, corrosion resistance, and good flexibility of general polyolefin materials, reduces the wear of the black fiber PE layer, reduces the probability of its damage and breakage, and reduces the difficulty of repairing the pipeline.

[0020] 2. The utility model further improves the performance of the DSSP hollow square double-wall polyolefin reinforced anti-leakage pipe by setting a cavity in the black fiber PE layer. On the one hand, the existence of the cavity makes the composite pipe of this embodiment lighter under the condition of the same thickness, reducing the risk of breakage caused by excessive deadweight load; on the other hand, the cavity forms a buffer space inside the composite pipe, enhancing the impact resistance of the composite pipe of this embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic cross-sectional view of a composite tube in an embodiment of the utility model.

[0023] Figure 2 It is a schematic cross-sectional view of a pipe section unit in an embodiment of the utility model.

[0024] Figure 3 It is a partial schematic cross-sectional view of a pipe section unit in an embodiment of the utility model.

[0025] Figure 4 It is a schematic cross-sectional view of the PE adhesive layer and the PE cap top layer in the embodiment of the utility model.

[0026] Reference numerals:

[0027] S-DSSP hollow square double-wall polyolefin reinforced anti-leakage pipe, S1-pipe section unit, S2-PE bonding layer, S3-PE cap top layer;

[0028] 100-PE outer layer;

[0029] 200-Xuan fiber PE layer, 201-cavity, 220-wave trough, 221-valley cavity, 240-wave peak, 241-peak cavity, 242-inner steel wire;

[0030] 300-PE inner layer;

[0031] 442-External steel wire. DETAILED DESCRIPTION

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0034] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0035] In one or more embodiments, it should be pointed out that the so-called basalt fiber PE layer refers to the tube wall layer made of basalt fiber reinforced polyolefin material; the so-called PE layer refers to the tube wall layer made of polyolefin material; the so-called inner side refers to the side close to the axial direction of the composite tube; the so-called outer side refers to the side away from the axial direction of the composite tube.

[0036] See also Figure 1-Figure 3 The first embodiment provides a DSSP hollow square double-wall polyolefin reinforced anti-leakage pipe S. Figure 1 , Figure 2 As shown in , the composite pipe of this embodiment is mainly formed by hot-melt bonding of multiple spiral pipe segment units S1. It should be noted that in addition to the hot-melt bonding method, the embodiment of the present application is not limited to the above bonding method, and can be other mature connection methods or processes in the industry.

[0037] like Figure 3 As shown in FIG. 1 , the pipe wall of the pipe section unit S1 mainly comprises a black fiber PE layer 200 , an outer PE layer 100 on the outside thereof, and an inner PE layer 300 on the inner side of the black fiber PE layer 200 , which together form a three-layer structure.

[0038] The PE layer 200 of the black fiber is made of basalt fiber reinforced polyolefin material. Compared with ordinary polyolefin materials, this material has higher rigidity and strength, and better high temperature resistance. It is not easy to soften at high temperatures, which significantly reduces the rigidity and strength. In this embodiment, the PE layer 200 of the black fiber is the main body of the composite pipe, and the thickness is relatively thick, which ensures the rigidity and strength of the composite pipe as a whole, and prevents the main structure of the composite pipe from being deformed due to high or low temperature. At the same time, Figure 3 As shown in , the black fiber PE layer 200 also constitutes a trough portion 220 and a peak portion 240. Among them, the trough portion 220 extends along the axial direction of the composite pipe, and the peak portion 240 is formed integrally at both ends of the trough portion 220 and extends along the radial direction of the composite pipe. The outwardly extending peak portion 240 is provided mainly to block the direct impact of debris falling on the pipeline during the construction process and reduce the pipeline damage rate during the construction process. In addition, the peak portion 240 is provided with two inner steel wires 242 near the PE inner layer 300, and the two inner steel wires 242 are spirally wound along the pipe wall of the composite pipe. By embedding two inner steel wires 242, the deformation resistance of the black fiber PE layer 200 and the rigidity of the pipe are further improved, so that the overall strength of the black fiber PE layer 200 is further improved.

[0039] like Figure 3As shown in the figure, the PE inner layer 300 is relatively thin, and is made of a general polyolefin material without basalt fiber reinforcement, and is arranged to cover the inner wall of the basalt fiber PE layer 200. When in use, the inner side of the composite pipe is generally less worn, but it should also be considered that when the composite pipe is used as a liquid medium delivery pipeline, its inner side will be eroded by the liquid medium for a long time, and it also needs to be protected. General polyolefin materials have better wear resistance and corrosion resistance than basalt fiber reinforced polyolefin materials. Therefore, the inner side of the basalt fiber PE layer 200 is covered with a general polyolefin material, which can protect it and prevent it from being damaged by long-term erosion of the liquid.

[0040] like Figure 3 As shown in the figure, the PE outer layer 100 is also relatively thin, and is made of general polyolefin material without basalt fiber reinforcement, and is arranged to wrap the outer wall of the basalt fiber PE layer 200, that is, the PE outer layer 100 combined with the PE inner layer 300 covers the entire outer surface of the basalt fiber PE layer 200. One of its functions is to protect the inner basalt fiber PE layer 200, reduce the wear and tear on it, reduce the probability of its breakage, and ensure the service life of the pipe.

[0041] In this embodiment, a three-layer structure of a PE outer layer 100, a black fiber PE layer 200, and a PE inner layer 300 is set. On the one hand, the black fiber PE layer 200 is used as the main body, so that the composite pipe has the advantages of high rigidity and high strength and is not easy to deform at high temperatures, which solves the problem that the polyolefin pipeline in the prior art has low rigidity and strength, and is easy to deform, damage or even break under impact; on the other hand, the PE layer is covered on the inner and outer sides, which utilizes the better wear resistance and corrosion resistance of general polyolefin materials, reduces the wear of the black fiber PE layer 200, reduces the probability of its damage and breakage, and reduces the difficulty of repairing the pipeline.

[0042] In this embodiment, due to the use of a three-layer composite structure of a PE outer layer 100, a black fiber PE layer 200, and a PE inner layer 300, and the high density of the black fiber PE layer 200 as the main body, the DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe S in this embodiment has a large self-weight. In order to reduce the self-weight load of the composite pipe and improve its durability, a cavity 201 is also provided in the black fiber PE layer 200 in this embodiment.

[0043] like Figure 2 , Figure 3 As shown in the figure, the trough 220 and the peak 240 formed by the black fiber PE layer 200 are provided with cavities 201, which are the trough cavity 221 and the peak cavity 241. Through the setting of the cavity 201, on the one hand, the existence of the cavity 201 makes the composite pipe of this embodiment lighter under the same thickness, reducing the risk of fracture caused by excessive deadweight load; on the other hand, the cavity 201 forms a buffer space inside the composite pipe, enhancing the impact resistance of the composite pipe of this embodiment.

[0044] Furthermore, if Figure 2 , Figure 3 As shown in , a plurality of cavities 201 are arranged in a pipe section unit S1, including two valley cavities 221 and two peak cavities 241, thereby forming a plurality of connecting ribs connected between the inner and outer sides of the cavity 201. The plurality of connecting ribs are located perpendicular to the pipe wall direction and connect the inner pipe walls on both sides of the cavity 201, which reduces the deflection of the pipe, thereby mainly reducing the influence of shear stress on the pipe, and the connecting ribs are distributed in the cavity 201 in a ring shape to cover the shear stress that may exist in all directions and reduce its influence. By reducing the influence of shear stress on the composite pipe structure, the structural stability of the black fiber PE layer 200 with the cavity 201 is ensured, its tendency to break is reduced, and the overall strength of the composite pipe is improved.

[0045] In addition, in this embodiment, the cross-sectional shape of the multiple annular cavities 201 can be circular, elliptical, polygonal, etc. However, the cross-sectional shape of the cavity 201 is preferably square. This is mainly because the limit of the fracture resistance of the black fiber PE layer 200 depends to a large extent on the minimum thickness of its inner wall and the connecting rib 220. Under the condition that the minimum thickness of the inner wall of the black fiber PE layer 200 remains unchanged, the square cross-section can save the material usage of the black fiber PE layer 200 to the greatest extent, realize the most economical utilization of the material, further reduce its deadweight load, and improve durability. There is another preferred method, which is to set the cavity 201 as a rounded square, so that the junction between the connecting rib and the inner and outer side walls of the cavity 201 becomes a rounded transition. By introducing rounded corners, stress can be dispersed, stress concentration can be reduced, fatigue and stress accumulation of structural materials can be reduced, and durability can also be improved.

[0046] In practical applications, there are certain requirements for the length of the pipeline. Considering the convenience of processing, the DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe S in the above embodiment is composed of multiple pipe segment units S1 connected to form a pipeline as a whole. Figure 4 The second embodiment provides a DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe S. On the basis of the first embodiment, a PE adhesive layer S2 is further provided between each pipe segment unit S1. Through the PE hot-melt adhesive layer S2, each pipe segment unit S1 is hot-melt bonded to form a composite pipe. The PE adhesive layer S2 is made of a polyolefin material with better elasticity than the PE inner layer 300 and the PE outer layer 100, and its two sides are respectively bonded to the connection surfaces of the two pipe segment units S1. By providing the PE hot-melt adhesive layer S2, even if the hot-melt bonding between each pipe segment unit S1 is connected to form a pipeline as a whole.

[0047] Furthermore, if Figure 4As shown in , in the second embodiment, a PE cap top layer S3 is also provided on the outside of the adjacent wave peaks 240 between the adjacent pipe section units S1. The PE cap top layer S3 is also made of a polyolefin material with better elasticity, which can protect the peak 240 with a larger peak cavity 241 and improve the service life of the composite pipe. At the same time, an outer steel wire 442 is also embedded inside the PE cap top layer S3, and the outer steel wire 442 is spirally wrapped along the pipe wall of the composite pipe. The PE cap top layer S3 is fastened by the outer steel wire 442 and is sleeved on the outside of the two adjacent wave peaks 240 connected to each other by the two composite pipes, so that the two adjacent wave peaks 240 are more closely joined and the strength and rigidity of the composite pipe are further improved, so that the stability of the entire composite pipe is stronger. Preferably, the outer steel wire 442 is arranged in the middle of the adjacent wave peaks 240, so that the forces on both sides are more uniform. And to a certain extent, the PE cap top layer S3 can be prevented from deflecting.

[0048] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe (S), which is connected by a plurality of spiral pipe segment units (S1), characterized in that: The pipe wall of any pipe section unit (S1) includes: A trough portion (220) and a crest portion (240) formed by a black fiber PE layer (200), the trough portion (220) extending along the axial direction of the composite pipe, and the crest portion (240) being integrally formed at both ends of the trough portion (220) and extending along the radial direction of the composite pipe; and A PE outer layer (100) and a PE inner layer (300), wherein the PE outer layer (100) is coated on the outer side of the black fiber PE layer (200), and the PE inner layer (300) is arranged on the inner side of the black fiber PE layer (200).

2. The DSSP hollow square double-wall polyolefin reinforced anti-leakage pipe (S) as claimed in claim 1, characterized in that: A cavity (201) is provided inside the trough portion (220) and / or the peak portion (240).

3. The DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe (S) as claimed in claim 2, characterized in that: There are a plurality of cavities (201) inside the trough portion (220), and the cavities (201) are arranged at intervals from each other.

4. The DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe (S) as claimed in claim 3, characterized in that: The cross-sectional shape of the multiple cavities (201) is square.

5. The DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe (S) as claimed in claim 1, characterized in that: The crest portion (240) is provided with an inner steel wire (242) adjacent to the PE inner layer (300), and the inner steel wire (242) is spirally wound along the wall of the composite pipe.

6. The DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe (S) as claimed in claim 5, characterized in that: The number of the inner steel wires (242) is two or more.

7. The DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe (S) as claimed in claim 1, characterized in that: A PE bonding layer (S2) is provided between each pipe section unit (S1), and each pipe section unit (S1) is bonded to form the composite pipe through the PE bonding layer (S2).

8. The DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe (S) as claimed in claim 2, characterized in that: The outer sides of adjacent wave peaks (240) between adjacent pipe section units (S1) are commonly provided with a PE cap top layer (S3).

9. The DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe (S) as claimed in claim 8, characterized in that: An outer steel wire (442) is also provided inside the top layer (S3) of the PE cap, and the outer steel wire (442) is spirally wound along the wall of the composite pipe.

10. The DSSP hollow square double-walled polyolefin reinforced anti-leakage pipe (S) as claimed in claim 9, characterized in that: The outer steel wire (442) is arranged in the middle of adjacent wave crest portions (240).

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