Double-crest enhanced spiral corrugated pipe

Abstract

The utility model discloses a double-crest reinforced spiral corrugated pipe, and relates to the technical field of corrugated pipes. The double-wave-crest reinforced spiral corrugated pipe comprises at least two coaxially-connected annular corrugated cylinders, each annular corrugated cylinder comprises a pipe inner wall of a solid wall structure, two sets of second wave crests symmetrically arranged, first wave crests, a reinforcing structure and a protection structure, and the second wave crests are fixedly installed on the outer wall of the pipe inner wall; the first wave crest is fixedly installed on the outer wall of the pipe inner wall and located between the two sets of second wave crests, the first wave crest and the two sets of second wave crests are arranged at intervals and do not make contact with each other, the reinforcing structures are arranged on the inner walls of the second wave crests, and the protection structures are arranged on the inner wall of the pipe inner wall. According to the double-wave-crest reinforced spiral corrugated pipe, local deformation can be restrained, fracture caused by stress concentration can be avoided, meanwhile, bending deformation of the two sets of second wave crests in butt joint can be induced through the arrangement of the annular stress buffering grooves, stress can be smoothly dispersed, deformation can be guided, stress concentration points can be reduced, and fracture caused by stress concentration is further avoided.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe technology, and in particular to a double-peak reinforced spiral corrugated pipe. Background Technology

[0002] Chinese patent document CN215674048U discloses a glass fiber reinforced polypropylene double-walled corrugated pipe, comprising: a hollow inner tube body and an outer spiral structure. The inner wall of the inner tube body is a smooth cylindrical surface. A steel corrugated pipe is sandwiched between the inner tube body and the outer spiral structure. The steel corrugated pipe is formed by spirally winding a reinforcing steel strip around the outer wall of the inner tube body. The reinforcing steel strip includes a straight portion and a wave-shaped portion. The wave-shaped portion includes a first wave peak formed by protrusions on both sides and a first wave trough formed by a depression in the middle. There is a cavity between the wave-shaped portion and the inner tube body. The outer spiral structure includes several spaced second wave peaks and second wave troughs. The second wave peaks cover the wave-shaped portion, and the second wave troughs cover the straight portion. An elastic structure is provided between the second wave peaks and the first wave troughs. In this invention, the elastic structure is provided to increase the impact resistance of the corrugated pipe and prevent damage to the inner tube body, thus possessing practicality.

[0003] The aforementioned glass fiber reinforced polypropylene double-walled corrugated pipe has a corrugated peak structure strength that needs further improvement. Furthermore, when the peaks bend and deform, it is difficult to smoothly disperse stress and guide deformation, which can easily lead to stress concentration and breakage. Utility Model Content

[0004] The purpose of this invention is to provide a double-peak reinforced spiral bellows, which can solve the problems that the strength of the peak structure needs to be further improved, and that when the peak is bent and deformed, it is difficult to smoothly disperse stress and guide deformation, which easily leads to stress concentration and cracking.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-peak reinforced spiral corrugated pipe, comprising at least two coaxially connected annular corrugated cylinders, each annular corrugated cylinder comprising a solid-walled inner wall, two symmetrically arranged sets of second peaks, a first peak, a reinforcing structure, and a protective structure. The second peaks are fixedly installed on the outer wall of the inner wall, and the first peaks are fixedly installed on the outer wall of the inner wall and located between the two sets of second peaks. The first peaks are spaced apart from the two sets of second peaks and do not contact each other. The reinforcing structure is disposed on the inner wall of the second peaks, and the protective structure is disposed on the inner wall of the inner wall.

[0006] Preferably, the vertical cross-section of the first wave crest is an isosceles trapezoid.

[0007] Preferably, the second wave crests of the two adjacent annular corrugated cylinders are fixedly connected to each other, and the combined vertical cross section of the two second wave crests after connection is an isosceles trapezoid, with an annular stress buffer groove formed at the top of the connection.

[0008] Preferably, the reinforcing structure is an annular reinforcing rib embedded in the inner wall of the second wave crest.

[0009] Preferably, the protective structure includes a first protective layer, a second protective layer, a third protective layer, and a fourth protective layer. The first protective layer is fixedly installed on the inner wall of the pipe, the second protective layer is fixedly installed on the inner wall of the first protective layer, the third protective layer is fixedly installed on the inner wall of the second protective layer, and the fourth protective layer is fixedly installed on the inner wall of the third protective layer.

[0010] Preferably, the first protective layer is epoxy resin, the second protective layer is nano-silica modified polymer, the third protective layer is ceramic fiber layer, and the fourth protective layer is porous sound-absorbing material layer.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] (1) The double-peak reinforced spiral corrugated pipe has two sets of second peaks symmetrically distributed on both sides of the first peak to form a triple load-bearing structure, which works together to disperse external pressure and significantly improve its compressive strength. The setting of the annular reinforcing rib can suppress local deformation and avoid stress concentration leading to cracking. At the same time, the adjacent corrugated cylinders are joined by the second peaks to form a continuous support surface in a trapezoidal structure, which greatly improves the overall stiffness and enhances the resistance to deformation. Meanwhile, the setting of the annular stress buffer groove can induce the bending deformation of the two sets of second peaks joined together, which can smoothly disperse stress and guide deformation, reduce stress concentration points, and further avoid stress concentration leading to cracking.

[0013] (2) The double-peak reinforced spiral corrugated pipe can resist chemical media corrosion and extend its service life through the setting of the first protective layer. Through the setting of the second protective layer, it can prevent scale and sludge from adhering and reduce flow resistance. Through the setting of the third protective layer, it can keep the conveying pipeline warm. Through the setting of the fourth protective layer, it can reduce fluid turbulence noise and reduce fluid boundary layer resistance, thereby improving conveying efficiency. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a perspective view of the annular corrugated cylinder of this utility model;

[0017] Figure 3 This utility model Figure 1 Enlarged view of part A in the image.

[0018] Reference numerals: 1. Annular corrugated cylinder; 101. Inner wall of the pipe; 102. First crest; 103. Second crest; 2. Annular reinforcing rib; 3. Protective structure; 301. First protective layer; 302. Second protective layer; 303. Third protective layer; 304. Fourth protective layer; 4. Annular stress buffer groove. Detailed Implementation

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0020] Please see Figure 1-3 This utility model provides a technical solution: a double-peak reinforced spiral corrugated pipe, including at least two coaxially connected annular corrugated cylinders 1. Each annular corrugated cylinder 1 includes a solid-walled inner wall 101, two symmetrically arranged sets of second peaks 103, a first peak 102, a reinforcing structure, and a protective structure 3. The second peaks 103 are fixedly installed on the outer wall of the inner wall 101, and the first peaks 102 are fixedly installed on the outer wall of the inner wall 101 and located between the two sets of second peaks 103. The first peaks 102 and the two sets of second peaks 103 are spaced apart and do not contact each other. The reinforcing structure is disposed on the inner wall of the second peaks 103, and the protective structure 3 is disposed on the inner wall of the inner wall 101.

[0021] The vertical cross-section of the first corrugated peak 102 is an isosceles trapezoid. The second corrugated peaks 103 of two adjacent annular corrugated cylinders 1 are fixedly connected to each other, and the combined vertical cross-section of the two second corrugated peaks 103 after connection is an isosceles trapezoid. An annular stress buffer groove 4 is formed at the top of the connection. The reinforcing structure is an annular reinforcing rib 2 embedded in the inner wall of the second corrugated peak 103. The two sets of second corrugated peaks 103 are symmetrically distributed on both sides of the first corrugated peak 102 to form a triple load-bearing structure, which synergistically disperses external pressure and significantly improves its compressive strength. The setting of the annular reinforcing rib 2 can suppress local deformation and avoid cracking caused by stress concentration. At the same time, the adjacent corrugated cylinders are connected through the second corrugated peaks 103, and the combined trapezoidal structure forms a continuous support surface, which greatly improves the overall rigidity and enhances the resistance to deformation. Meanwhile, the setting of the annular stress buffer groove 4 can induce the bending deformation of the two connected sets of second corrugated peaks 103, which can smoothly disperse stress and guide deformation, reduce stress concentration points, and further avoid cracking caused by stress concentration.

[0022] The protective structure 3 includes a first protective layer 301, a second protective layer 302, a third protective layer 303, and a fourth protective layer 304. The first protective layer 301 is fixedly installed on the inner wall of the pipe inner wall 101, the second protective layer 302 is fixedly installed on the inner wall of the first protective layer 301, the third protective layer 303 is fixedly installed on the inner wall of the second protective layer 302, and the fourth protective layer 304 is fixedly installed on the inner wall of the third protective layer 303. The first protective layer 301 is epoxy resin, which can resist chemical media corrosion and extend service life. The second protective layer 302 is a nano-silica modified polymer, which can prevent scale and sludge adhesion and reduce flow resistance. The third protective layer 303 is a ceramic fiber layer, which can insulate the conveying pipeline. The fourth protective layer 304 is a porous sound-absorbing material layer, which can reduce fluid turbulence noise and reduce fluid boundary layer resistance, thereby improving conveying efficiency.

[0023] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A dual peak enhanced spiral corrugated pipe characterized in that, include: At least two coaxially connected annular corrugated cylinders (1), each annular corrugated cylinder (1) comprising: The inner wall of the tube with a solid wall structure (101); Two sets of second wave peaks (103) are symmetrically arranged and fixedly installed on the outer wall of the inner wall (101) of the pipe; The first wave peak (102) is fixedly installed on the outer wall of the inner wall (101) of the pipe and located between the two sets of second wave peaks (103). The first wave peak (102) and the two sets of second wave peaks (103) are spaced apart and do not contact each other. A reinforcing structure is provided on the inner wall of the second wave crest (103); The protective structure (3) is installed on the inner wall of the pipe (101).

2. A dual hump reinforced spiral corrugated pipe according to claim 1, wherein: The vertical cross section of the first wave crest (102) is an isosceles trapezoid.

3. A dual hump reinforced spiral corrugated pipe according to claim 1, wherein: The second wave peaks (103) of two adjacent annular corrugated cylinders (1) are fixedly connected to each other, and the combined vertical cross section of the two second wave peaks (103) after connection is an isosceles trapezoid, and an annular stress buffer groove (4) is formed at the top of the connection.

4. A dual hump enhanced spiral corrugated pipe according to claim 1, wherein: The reinforcing structure is an annular reinforcing rib (2) embedded in the inner wall of the second wave crest (103).

5. A dual hump enhanced spiral corrugated pipe according to claim 1, wherein: The protective structure (3) includes a first protective layer (301), a second protective layer (302), a third protective layer (303), and a fourth protective layer (304). The first protective layer (301) is fixedly installed on the inner wall of the inner wall of the pipe (101), the second protective layer (302) is fixedly installed on the inner wall of the first protective layer (301), the third protective layer (303) is fixedly installed on the inner wall of the second protective layer (302), and the fourth protective layer (304) is fixedly installed on the inner wall of the third protective layer (303).

6. A dual peak enhanced spiral corrugated pipe according to claim 5, wherein: The first protective layer (301) is epoxy resin, the second protective layer (302) is nano-silica modified polymer, the third protective layer (303) is ceramic fiber layer, and the fourth protective layer (304) is porous sound-absorbing material layer.

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