Multi-support compression-resistant W-shaped steel belt reinforced corrugated pipe

Abstract

The utility model belongs to the technical field of corrugated pipes, and discloses a multi-support compression-resistant W-shaped steel belt reinforced corrugated pipe, which adopts a steel belt with a W-shaped top to further increase the compression capacity of the top, and when the corrugated pipe is bent, the middle wave crest at the top of the steel belt can further protrude outwards or sink inwards to reduce the component force between the bottom of the steel belt and the pipe wall at the moment, so that the service life of the corrugated pipe is prolonged. The separation probability of the steel belt and the pipe wall is further reduced, so that the durability of the corrugated pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of corrugated pipes, in particular to a multi-support compression-resistant W-shaped steel belt reinforced corrugated pipe. Background Art

[0002] Steel belt corrugated pipes are widely used in drainage and sewage scenes in various fields due to their strong radial extrusion resistance. However, the cross-section of the steel belt of the corrugated pipe in the prior art is mostly n-shaped, and there is only one wave peak in the cross-section. When radially extruded, the capacity of absorbing potential energy through elastic deformation is low. Therefore, in order to increase the anti-extrusion performance, it is necessary to increase the wall thickness, thereby increasing the production cost;

[0003] The Chinese patent application number 202321639527.X discloses a double-wall mesh steel belt reinforced PE spiral corrugated pipe, whose steel belt cross-section is an M-shaped structure. In addition to the two groups of wave peaks on the top, a group of wave troughs is added. During radial extrusion, in addition to the side wall of the raised part being able to deform radially and absorb energy, it can also squeeze the wave peaks and wave troughs on the top to further absorb energy. However, in actual use, when the pipeline is subjected to a large radial pressure or is repeatedly bent, there is a situation where the steel belt is separated from the pipe wall. After analysis, it is found that when the pipeline is bent or radially stressed, when the peaks and valleys at the top are compressed, a reverse force is applied to the bottom of the steel belt, that is, the axial force between the bottom of the steel belt and the pipe wall increases. Due to the production process of the corrugated pipe, the outer covering layer and the pipe wall are not extruded sequentially, and the degree of fusion between the two is limited. When the axial force is large, there is a possibility of stratification, so the steel belt is separated from the pipe wall, and its radial bearing capacity is lost or severely reduced. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a multi-support, pressure-resistant W-shaped steel belt reinforced corrugated pipe. A steel belt with a W-shaped top is used to further increase the compression capacity of the top, and when the corrugated pipe is bent, the middle wave peak at the top of the steel belt can further bulge outward or sink inward, reducing the force between the bottom of the steel belt and the pipe wall at this time, further reducing the probability of separation between the steel belt and the pipe wall, thereby improving the durability of the corrugated pipe, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-support compression-resistant W-shaped steel belt reinforced corrugated pipe, which includes a pipe wall, a steel belt and an outer covering layer in sequence from the inner cavity to the outer wall;

[0006] The steel belt is spirally wound and covered on the outside of the pipe wall, and the cross section is a convex structure in the middle, and the top of the convex structure is W-shaped;

[0007] The outer covering layer covers the outside of the pipe wall and steel strip.

[0008] As a preferred technical solution of the utility model, the steel strip includes a horizontal portion, a peak wall portion and a peak top portion;

[0009] The peak is a W-shaped structure, and the middle peak is the same height as or different from the peaks on both sides;

[0010] When designing, the middle peak can be at the same height as the peaks on both sides, which has better comprehensive performance;

[0011] The middle peak can be higher than the peaks on both sides, in which case it has better radial anti-extrusion performance;

[0012] The middle peak can be lower than the peaks on both sides. In this case, it has better bending ability.

[0013] As a preferred technical solution of the utility model, the peak wall portion is a plate-shaped surface or an arc-shaped surface;

[0014] By changing the structural design of the peak wall, the deformation direction of the peak top can be guided to achieve different energy orientations.

[0015] As a preferred technical solution of the utility model, mesh holes are evenly arranged on the surface of the horizontal portion;

[0016] The mesh holes are arranged in the horizontal part, so that when the outer covering layer is extruded, part of the rubber material passes through the steel belt and connects with the pipe wall, thereby increasing the resistance to the axial relative movement of the steel belt and the pipe wall and reducing the probability of separation between the two.

[0017] As a preferred technical solution of the utility model, the outer part of the tube wall is provided with a friction layer;

[0018] By setting friction lines on the outside of the tube wall, the contact and adhesion area between the outer covering layer and the tube wall is increased, thereby increasing the adhesion and effectively reducing the probability of separation between the two.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. This multi-support compression-resistant W-shaped steel belt reinforced corrugated pipe adopts a W-shaped steel belt to increase the number of peaks at the top of the peak, effectively increasing the deformation capacity of the peak top, thereby effectively improving the radial extrusion resistance and bending capacity of the corrugated pipe;

[0021] 2. After adopting the W-shaped steel belt, its performance can be further changed by designing the height of the three groups of peaks at the top of the peak. For example, increasing the middle peak can improve its radial anti-extrusion ability, lowering the middle peak can improve its bending ability, and making the three groups of peaks rise higher can obtain better comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a partial schematic diagram of the axial section of the utility model;

[0024] Figure 3 It is a partial schematic diagram of the radial extrusion force of the axial section of the utility model;

[0025] Figure 4 It is a partial schematic diagram of the bending force of the axial section of the utility model;

[0026] Figure 5 It is a schematic diagram of the steel belt of the utility model.

[0027] In the figure: 1, pipe wall; 101, friction pattern; 2, steel belt; 201, horizontal part; 202, peak wall part; 203, peak top part; 3, outer covering layer. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Embodiment 1:

[0030] See also Figure 1-Figure 2 , the utility model provides a technical solution: a multi-support compression-resistant W-shaped steel belt reinforced corrugated pipe, which includes a pipe wall 1, a steel belt 2 and an outer covering layer 3 from the inner cavity to the outer wall;

[0031] The steel belt 2 is spirally wound and covered on the outside of the pipe wall 1, and has a cross section with a convex structure in the middle, and the top of the convex structure is W-shaped;

[0032] The outer covering layer 3 is covered on the outside of the pipe wall 1 and the steel strip 2.

[0033] The steel strip 2 includes a horizontal portion 201, a peak wall portion 202 and a peak top portion 203;

[0034] The peak top 203 is a W-shaped structure, and the middle peak has the same height as the peaks on both sides;

[0035] See also Figure 3 ,When designing, the middle peak can be equal in height to the peaks on both sides, which has better comprehensive performance;

[0036] When the middle peak is at the same height as the peaks on both sides and is subjected to radial extrusion, the three groups of peaks are subjected to force at the same time, the force is relatively uniform, and there is friction between the three groups of peaks and the force-applying objects, that is, the axial compression between them is limited, and more potential energy is absorbed by the deformation of the peak wall portion 202.

[0037] The peak wall portion 202 is an outwardly concave arc surface. When the corrugated tube is subjected to a radial extrusion force F, an outward extrusion component force F1 and an outward expansion component force F2 of the base are generated. F1 is larger than the plate-shaped peak wall portion 202, while F2 is reduced, guiding the peak top portion 203 to stretch to both sides. At this time, the friction between the peak tops on both sides and the force-applying objects can also absorb part of the potential energy, reduce the deformation of the peak wall portion 202, and reduce the interaction force between the horizontal portion 201 and the pipeline 1.

[0038] See also Figure 5 , meshes are evenly arranged on the surface of the horizontal portion 201; the meshes are arranged on the horizontal portion 201, so that when the outer covering layer 3 is extruded, part of the rubber passes through the steel belt 2 and connects with the pipe wall, thereby increasing the resistance to the axial relative movement of the steel belt 2 and the pipe wall 1 and reducing the probability of separation between the two;

[0039] See also Figure 2 A friction pattern layer 101 is arranged on the outside of the tube wall 1; by arranging the friction pattern on the outside of the tube wall 1, the contact and adhesion area between the outer covering layer 3 and the tube wall is increased, thereby increasing the adhesion and effectively reducing the separation probability of the two.

[0040] Embodiment 2:

[0041] The difference from the first embodiment is that:

[0042] When designing, the middle peak can be higher than the peaks on both sides. In this case, it has better radial anti-extrusion performance;

[0043] When the middle peak is higher than the peaks on both sides and is subjected to radial extrusion, the middle peak is first contacted and sunken by the force, generating a component force F1 that causes the peak top 203 to be extruded toward the middle and a component force F2 that causes the horizontal portion 201 to expand outward. When the peaks on both sides are compressed and approach the middle peak, they come into contact with each other to bear the load. The deformation that occurs during the process can also absorb part of the potential energy. The peak top 203 of the first embodiment has a larger peak deformation capacity, the deformation of the peak wall portion 202 is relatively reduced, and the axial component force F2 between the horizontal portion 201 and the tube wall 1 is reduced. Therefore, this structure can withstand a larger radial extrusion pressure.

[0044] Embodiment three:

[0045] The difference from the first and second embodiments is that:

[0046] When designing, the middle peak can be lower than the peaks on both sides. In this case, it has better bending ability.

[0047] See also Figure 4 When the middle peak is lower than the peaks on both sides, when subjected to bending, the middle peak can be deformed before the peaks on both sides, and the peaks on both sides are close to or far away, and the deformation capacity between the two is increased compared with the first embodiment. Taking inward bending as an example, the horizontal portion 201 is subjected to an upward force F, and the steel strip is subjected to a force component F1 that compresses the peak top 203 toward the middle, and a force component F2 that reduces the spacing between the horizontal portions 201. By increasing the deformation of the peak top 203, the deformation of the peak wall portion 202 is further reduced, thereby reducing the axial force component F2 between the horizontal portion 201 and the tube wall 1. Therefore, this structure has a better bending ability.

[0048] Preferably, during pipeline production, the steel belt 2 is spirally wrapped around the outside of the polyethylene pipe wall 1, and then the polyethylene outer layer is extruded and covered. When the outer layer of polyethylene is extruded, the rubber can penetrate through the mesh of the horizontal portion 201 and combine with the inner layer of the pipe wall 1, and cooperate with the friction pattern 101 on the outer wall of the pipe wall 1 to increase the bonding area between the new and old rubbers, thereby increasing the bonding strength.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-support compression-resistant W-shaped steel belt reinforced corrugated pipe, characterized in that: The tube comprises a tube wall (1), a steel strip (2) and an outer covering layer (3) in sequence from the inner cavity to the outer wall; The steel strip (2) is spirally wound and covered on the outside of the pipe wall (1), and has a cross-section with a convex structure in the middle, and the top of the convex structure is W-shaped; The outer covering layer (3) covers the outside of the pipe wall (1) and the steel strip (2).

2. The multi-support compression-resistant W-shaped steel belt reinforced corrugated pipe according to claim 1 is characterized in that: The steel strip (2) comprises a horizontal portion (201), a peak wall portion (202) and a peak top portion (203); The peak top (203) is a W-shaped structure, and the height of the middle peak is the same as or different from the height of the peaks on both sides.

3. The multi-support compression-resistant W-shaped steel belt reinforced corrugated pipe according to claim 2 is characterized in that: The peak wall portion (202) is a plate-shaped surface or an arc-shaped surface.

4. The multi-support compression-resistant W-shaped steel belt reinforced corrugated pipe according to claim 2 is characterized in that: The surface of the horizontal portion (201) is evenly provided with mesh holes.

5. The multi-support compression-resistant W-shaped steel belt reinforced corrugated pipe according to claim 1, characterized in that: The exterior of the tube wall (1) is provided with a friction layer (101).

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