Steel wire mesh framework reinforced polyethylene composite pipe

Abstract

The utility model discloses a steel wire mesh framework reinforced polyethylene composite pipe, which belongs to the technical field of steel wire mesh framework polyethylene composite pipes, and adopts the technical scheme that the steel wire mesh framework reinforced polyethylene composite pipe comprises a composite pipe main body, and a plurality of annular reinforcing ribs are sleeved on the surface of the composite pipe main body. A plurality of longitudinal reinforcing ribs are annularly adhered to the inner wall of the composite pipe main body; the annular reinforcing rib comprises a rubber base, the rubber base is bonded to the surface of the composite pipe body, and the overall strength and stability of the composite pipe body are effectively improved through the cooperative use of the annular reinforcing rib and the longitudinal reinforcing ribs and the internal and external combined reinforcing structure design; the annular reinforcing ribs can enhance the external pressure resisting capacity of the composite pipe body in the circumferential direction, the longitudinal reinforcing ribs mainly enhance the pressure resisting capacity of the composite pipe body in the axial direction, and it is guaranteed that the pipe can keep good shape and structural integrity when bearing axial pressure such as soil gravity.

Description

Technical Field

[0001] The utility model relates to the technical field of steel mesh skeleton polyethylene composite pipes, in particular to a steel mesh skeleton reinforced polyethylene composite pipe. Background Art

[0002] Steel mesh skeleton polyethylene composite pipe is a new type of pipe that uses a mesh skeleton formed by spirally winding high-strength steel wire as a reinforcement, high-density polyethylene as a matrix, and high-performance HDPE modified adhesive resin to tightly connect the steel wire skeleton with the inner and outer layers of high-density polyethylene. Steel mesh skeleton polyethylene composite pipe is often used in urban water supply and drainage pipelines, most of which are buried underground for a long time.

[0003] Existing steel wire mesh skeleton polyethylene composite pipe fittings are insulated by inner and outer polyethylene layers, but their heat resistance is not good enough and their thermal expansion coefficient is large. When the temperature of the fluid in the pipe fluctuates greatly, the inner and outer polyethylene layers are prone to rapid cracking due to local defects and stress concentration under the action of persistent hoop stress, which reduces the reliability and service life of the composite pipe fittings.

[0004] The existing patent (publication number: CN207796298U) discloses a steel wire mesh skeleton polyethylene composite pipe fitting, which includes an outer protective layer, a first hot melt adhesive layer, a polyurethane insulation layer, a second hot melt adhesive layer and an inner base material from the outside to the inside. The inner base material is polyethylene embedded with glass fiber cotton. The polyurethane insulation layer is embedded with a steel wire mesh skeleton. The first hot melt adhesive layer and the second hot melt adhesive layer respectively bond the polyurethane insulation layer to the outer protective layer and the inner base material. This utility model has good temperature stability, good thermal insulation effect and long service life.

[0005] In response to the above problems, existing patents have provided solutions. During actual use, the wire mesh skeleton polyethylene composite pipe, especially when the pipe is buried in the soil, will face continuous pressure from the soil, including the gravity of the soil itself and additional pressure caused by factors such as ground subsidence and external loads. The existing wire mesh skeleton polyethylene composite pipe has certain limitations when it comes to withstanding such soil burial pressure. On the one hand, although its conventional wire mesh skeleton and polyethylene composite structure can provide a certain pressure resistance, when facing large, complex and changeable soil pressure, the pipe may still be deformed or ruptured, affecting the normal operation of the pipeline system. On the other hand, there is a lack of an effective pressure-resistant reinforcement structure designed specifically for the characteristics of the soil burial environment, and it cannot fully meet the high pressure resistance requirements for long-term stable operation under soil burial conditions.

[0006] Therefore, a steel wire mesh skeleton reinforced polyethylene composite pipe is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide a steel mesh skeleton reinforced polyethylene composite pipe, which can solve the certain limitations of existing steel mesh skeleton polyethylene composite pipes when bearing such soil burial pressure. On the one hand, although its conventional steel mesh skeleton and polyethylene composite structure can provide a certain pressure resistance, when facing large, complex and changeable soil pressure, the pipe may still be deformed, ruptured, etc., affecting the normal operation of the pipeline system. On the other hand, there is a lack of an effective pressure-resistant reinforcement structure designed specifically for the characteristics of the soil burial environment, and it is unable to fully meet the high pressure resistance requirements for long-term stable operation under soil burial conditions.

[0008] To achieve the above object, the present invention provides the following technical solution: a steel wire mesh skeleton reinforced polyethylene composite pipe, comprising a composite pipe body, a surface of the composite pipe body being sleeved with a plurality of annular reinforcing ribs, and an inner wall of the composite pipe body being annularly bonded with a plurality of longitudinal reinforcing ribs;

[0009] The annular reinforcing rib includes a rubber base, the rubber base is bonded to the surface of the composite pipe body, a connecting ring is provided on the surface of the rubber base, and a rubber outer ring is provided on the surface of the connecting ring. The inner wall and surface of the connecting ring are both provided with an elastic metal skeleton in an annular shape, and the elastic metal skeleton is connected to the rubber base and the rubber outer ring on one side thereof;

[0010] The composite pipe body includes an outer polyethylene main layer and an inner polyethylene main layer. A steel mesh reinforcement layer is provided between opposite sides of the outer polyethylene main layer and the inner polyethylene main layer. A protective layer is provided on the surface of the outer polyethylene main layer.

[0011] Preferably, the steel wire mesh reinforcement layer includes an inner steel wire mesh, which is coated on the surface of the inner polyethylene main layer, and an intermediate buffer layer is provided on the surface of the inner steel wire mesh, and an outer steel wire mesh is provided on the surface of the intermediate buffer layer, and the outer steel wire mesh is connected to the inner wall of the outer polyethylene main layer.

[0012] Preferably, the middle buffer layer is made of elastic rubber, and the middle buffer layer is connected to the inner layer of steel wire mesh and the outer layer of steel wire mesh respectively through an adhesive.

[0013] Preferably, the inner layer of steel wire mesh is made of high-strength fine steel wire, and a skeleton with smaller mesh is formed through a weaving process, and the outer layer of steel wire mesh is made of high-strength thick steel wire, and a skeleton with larger mesh is formed through a welding process.

[0014] Preferably, the protective layer includes an impact-resistant layer, which is arranged on the surface of the outer polyethylene main layer, the surface of the impact-resistant layer is provided with an anti-corrosion layer, and the surface of the anti-corrosion layer is provided with a wear-resistant layer.

[0015] Preferably, the impact-resistant layer is a polyurethane elastomer coating and is evenly coated on the surface of the outer polyethylene main layer.

[0016] Preferably, the anti-corrosion layer is made of polyurethane coating and is evenly coated on the surface of the impact-resistant layer.

[0017] Preferably, the wear-resistant layer is composed of a ceramic coating and is evenly coated on the surface of the anti-corrosion layer.

[0018] Preferably, the cross-section of the annular reinforcement ribs is trapezoidal, and the annular reinforcement ribs are arranged on the surface of the composite pipe body at intervals of 10-20 cm.

[0019] Preferably, a groove is provided at the connection between the composite pipe body and the annular reinforcement rib, and a plurality of connecting plates are provided inside the groove. A plurality of glue injection holes are opened in a ring shape inside the annular reinforcement rib, and the glue injection holes are connected to the groove. A sealing plug is provided inside the glue injection hole.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This application effectively improves the overall strength and stability of the composite pipe body by providing a combination of annular reinforcement ribs and longitudinal reinforcement ribs, creating a combined internal and external reinforcement structure. The annular reinforcement ribs can enhance the composite pipe body's ability to resist external pressure in the circumferential direction, while the longitudinal reinforcement ribs mainly enhance the composite pipe body's ability to resist axial pressure, ensuring that the pipe can maintain good shape and structural integrity when subjected to axial pressure such as soil gravity.

[0022] 2. This application provides a composite pipe body, which can extend the service life of the composite pipe body when the pipe is buried in the soil, ensure that its performance is not affected by corrosion, and enhance resistance to wear of the composite pipe body surface by external objects, thereby maintaining the appearance and performance of the composite pipe body, and comprehensively improving the durability and reliability of the composite pipe body in complex use environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the overall structure diagram of the steel wire mesh skeleton reinforced polyethylene composite pipe of the present invention;

[0024] Figure 2 This is an exploded schematic diagram of the annular reinforcing rib of the utility model;

[0025] Figure 3 This is a schematic diagram of the connection between the annular reinforcement rib and the composite pipe body of the utility model;

[0026] Figure 4 For this utility model Figure 3 A magnified schematic diagram of point A in the middle;

[0027] Figure 5 This is an exploded schematic diagram of the composite pipe body of the utility model;

[0028] Figure 6 This is an exploded schematic diagram of the protective layer of the utility model;

[0029] Figure 7 This is a schematic diagram of the decomposition of the wire mesh reinforcement layer of the utility model.

[0030] In the figure, 1. Composite pipe body; 2. Annular reinforcement rib; 21. Rubber base; 22. Connecting ring; 23. Rubber outer ring; 24. Elastic metal skeleton; 3. Longitudinal reinforcement rib; 4. Outer polyethylene main layer; 5. Inner polyethylene main layer; 6. Wire mesh reinforcement layer; 61. Inner wire mesh; 62. Intermediate buffer layer; 63. Outer wire mesh; 7. Protective layer; 71. Impact-resistant layer; 72. Anti-corrosion layer; 73. Wear-resistant layer; 8. Groove; 9. Connecting plate; 10. Glue injection hole; 11. Sealing plug. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figures 1-7 , this utility model provides a technical solution:

[0033] A steel wire mesh skeleton reinforced polyethylene composite pipe comprises a composite pipe body 1, a surface of the composite pipe body 1 is sleeved with a plurality of annular reinforcing ribs 2, and an inner wall of the composite pipe body 1 is annularly bonded with a plurality of longitudinal reinforcing ribs 3;

[0034] The annular reinforcing rib 2 includes a rubber base 21, which is bonded to the surface of the composite pipe body 1. A connecting ring 22 is provided on the surface of the rubber base 21, and a rubber outer ring 23 is provided on the surface of the connecting ring 22. An elastic metal skeleton 24 is provided on the inner wall and surface of the connecting ring 22 in an annular shape, and the elastic metal skeleton 24 is connected to the rubber base 21 and the rubber outer ring 23 on one side thereof.

[0035] The composite pipe body 1 includes an outer polyethylene main layer 4 and an inner polyethylene main layer 5. A steel mesh reinforcement layer 6 is provided between the opposite sides of the outer polyethylene main layer 4 and the inner polyethylene main layer 5. A protective layer 7 is provided on the surface of the outer polyethylene main layer 4.

[0036] In this embodiment, by providing the annular reinforcing rib 2, the rubber base 21 provides a certain buffering and shock-absorbing effect, while enhancing the bonding effect with the surface of the composite pipe body 1. The connecting ring 22 and the elastic metal skeleton 24 therein further strengthen the overall structural strength of the annular reinforcing rib 2, making it less likely to deform or be damaged when subjected to external forces. When the annular reinforcing rib 2 is subjected to pressure, the elastic metal skeleton 24 can effectively transmit and disperse stress, thereby ensuring the stability of the connection between the annular reinforcing rib 2 and the composite pipe body 1, thereby continuously playing its role in enhancing the pressure resistance of the composite pipe body 1.

[0037] By setting the composite pipe body 1 to consist of an inner polyethylene main layer 5, an outer polyethylene main layer 4, a steel mesh reinforcement layer 6 and a protective layer 7, the steel mesh reinforcement layer 6 provides multi-dimensional support and reinforcement for the composite pipe body 1, while avoiding stress concentration on the inner polyethylene main layer 5, further improving the pressure resistance of the composite pipe body 1, and the protective layer 7 can enhance the resistance of the composite pipe body 1 to interference from external environmental factors, thereby ensuring the usability and life of the composite pipe body 1.

[0038] Specifically, such as Figure 7 As shown, the steel wire mesh reinforcement layer 6 includes an inner steel wire mesh 61, which is covered on the surface of the inner polyethylene main layer 5, and an intermediate buffer layer 62 is provided on the surface of the inner steel wire mesh 61, and an outer steel wire mesh 63 is provided on the surface of the intermediate buffer layer 62, and the outer steel wire mesh 63 is connected to the inner wall of the outer polyethylene main layer 4.

[0039] Specifically, such as Figure 7 As shown, the middle buffer layer 62 is made of elastic rubber, and the middle buffer layer 62 is connected to the inner layer steel mesh 61 and the outer layer steel mesh 63 respectively through an adhesive.

[0040] Specifically, such as Figure 7 As shown, the inner layer steel mesh 61 is made of high-strength fine steel wire, and a skeleton with smaller mesh is formed through a weaving process. The outer layer steel mesh 63 is made of high-strength thick steel wire, and a skeleton with larger mesh is formed through a welding process.

[0041] In this embodiment: by providing a steel mesh reinforcement layer 6, the inner steel mesh 61 mainly provides fine radial support for the composite pipe body 1, effectively resisting radial deformation caused by internal pressure, and the outer steel mesh 63 mainly provides strong axial and circumferential support to ensure the overall stability of the pipe when it is subjected to external soil pressure, and prevent the pipe from deforming or rupturing in the axial and circumferential directions. When the composite pipe body 1 is subjected to pressure, the intermediate buffer layer 62 can buffer and disperse stress through its own elastic deformation, avoiding stress concentration on the steel mesh or polyethylene layer, and further improving the pressure resistance of the composite pipe body 1.

[0042] Specifically, such asFigure 6 As shown, the protective layer 7 includes an impact-resistant layer 71 , which is arranged on the surface of the outer polyethylene main layer 4 , an anti-corrosion layer 72 is arranged on the surface of the impact-resistant layer 71 , and a wear-resistant layer 73 is arranged on the surface of the anti-corrosion layer 72 .

[0043] Specifically, such as Figure 6 As shown, the impact-resistant layer 71 is a polyurethane elastomer coating and is evenly coated on the surface of the outer polyethylene main layer 4 .

[0044] Specifically, such as Figure 6 As shown, the anti-corrosion layer 72 is made of polyurethane coating and is evenly coated on the surface of the impact-resistant layer 71.

[0045] Specifically, such as Figure 6 As shown, the wear-resistant layer 73 is composed of a ceramic coating and is evenly coated on the surface of the anti-corrosion layer 72.

[0046] In this embodiment: by providing a protective layer 7, the impact-resistant layer 71 can absorb and disperse the external impact energy received by the composite pipe body 1 during use, thereby preventing the pipe from being broken or damaged due to impact, and ensuring the integrity of the composite pipe body 1; the anti-corrosion layer 72 can effectively resist the erosion of the composite pipe body 1 by corrosive substances in the external environment, especially when the pipe is buried in the soil or exposed to an environment with corrosive gases or liquids, it can extend the service life of the composite pipe body 1 and ensure that its performance is not affected by corrosion; the wear-resistant layer 73 mainly resists the wear of the surface of the composite pipe body 1 by external objects, prevents the surface of the pipe from being scratched and worn, thereby maintaining the appearance and performance of the composite pipe body 1, and comprehensively improving the durability and reliability of the composite pipe body 1 in complex use environments.

[0047] Specifically, such as Figure 1 、 Figure 3 As shown, the cross section of the annular reinforcement rib 2 is trapezoidal, and the annular reinforcement rib 2 is arranged on the surface of the composite pipe body 1 at intervals of 10-20 cm.

[0048] Specifically, such as Figure 4 As shown, a groove 8 is provided at the connection between the composite pipe body 1 and the annular reinforcing rib 2, and a plurality of connecting plates 9 are provided inside the groove 8. A plurality of glue injection holes 10 are opened in a ring shape inside the annular reinforcing rib 2, and the glue injection holes 10 are connected to the groove 8. A sealing plug 11 is provided inside the glue injection hole 10.

[0049] In this embodiment: the annular reinforcing ribs 2 with a trapezoidal cross-section are arranged on the surface of the composite pipe body 1 at intervals of 10-20 cm. The design of the trapezoidal cross-section enables the annular reinforcing ribs 2 to more effectively and evenly disperse the pressure along the circumferential direction when subjected to lateral pressure, thereby ensuring effective dispersion of the lateral pressure. Through the provided grooves 8 and other structures, when installing the annular reinforcing ribs 2, glue can be injected into the grooves 8 through the glue injection holes 10. The glue is filled between the grooves 8 and the connecting plates 9, further enhancing the bonding force between the composite pipe body 1 and the annular reinforcing ribs 2, ensuring that the annular reinforcing ribs 2 will not easily fall off or loosen from the surface of the composite pipe body 1 when subjected to external force, and the sealing plugs 11 provided in the glue injection holes 10 facilitate inspection and maintenance of the connection when necessary.

[0050] Working principle: When the composite pipe body 1 is in use, the annular reinforcement ribs 2 can be arranged on the surface of the composite pipe body 1 at intervals of 10-20 cm and in the position of the groove 8. Glue is injected into the groove 8 through the glue injection hole 10. The glue is filled between the groove 8 and the connecting plate 9 to enhance the bonding force between the composite pipe body 1 and the annular reinforcement rib 2. Then the sealing plug 11 is used to seal the glue injection hole 10. When the composite pipe body 1 is subjected to the pressure of the buried soil, the annular reinforcement ribs 2 and the longitudinal reinforcement ribs 3 are used in conjunction with each other. The annular reinforcement ribs 2 enhance the ability of the composite pipe body 1 to resist external pressure in the circumferential direction, and the longitudinal reinforcement ribs 3 mainly enhance the compressive resistance of the composite pipe body 1 in the axial direction. The wire mesh reinforcement layer 6 provides multi-dimensional support and reinforcement for the composite pipe body 1, while avoiding stress concentration on the inner polyethylene main layer 5, further improving the pressure resistance of the composite pipe body 1, and the protective layer 7 can enhance the resistance of the composite pipe body 1 to interference from external environmental factors, thereby ensuring the usability and life of the composite pipe body 1.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A steel wire mesh skeleton reinforced polyethylene composite pipe, comprising a composite pipe body (1), characterized in that: The surface of the composite pipe body (1) is sleeved with a plurality of annular reinforcing ribs (2), and the inner wall of the composite pipe body (1) is annularly bonded with a plurality of longitudinal reinforcing ribs (3); The annular reinforcing rib (2) comprises a rubber base (21), the rubber base (21) being bonded to the surface of the composite pipe body (1), a connecting ring (22) being provided on the surface of the rubber base (21), and a rubber outer ring (23) being provided on the surface of the connecting ring (22), an elastic metal skeleton (24) being provided on the inner wall and the surface of the connecting ring (22) in an annular shape, and the elastic metal skeleton (24) being connected to the rubber base (21) and the rubber outer ring (23) on one side thereof; The composite pipe body (1) comprises an outer polyethylene main layer (4) and an inner polyethylene main layer (5); a steel mesh reinforcement layer (6) is provided between opposite sides of the outer polyethylene main layer (4) and the inner polyethylene main layer (5); and a protective layer (7) is provided on the surface of the outer polyethylene main layer (4).

2. The steel wire mesh skeleton reinforced polyethylene composite pipe according to claim 1, characterized in that: The steel wire mesh reinforcement layer (6) comprises an inner steel wire mesh (61), the inner steel wire mesh (61) is coated on the surface of the inner polyethylene main layer (5), and an intermediate buffer layer (62) is provided on the surface of the inner steel wire mesh (61), an outer steel wire mesh (63) is provided on the surface of the intermediate buffer layer (62), and the outer steel wire mesh (63) is connected to the inner wall of the outer polyethylene main layer (4).

3. The steel wire mesh skeleton reinforced polyethylene composite pipe according to claim 2, characterized in that: The intermediate buffer layer (62) is made of elastic rubber, and the intermediate buffer layer (62) is connected to the inner layer steel wire mesh (61) and the outer layer steel wire mesh (63) respectively through an adhesive.

4. The steel wire mesh skeleton reinforced polyethylene composite pipe according to claim 2, characterized in that: The inner layer steel wire mesh (61) is made of high-strength fine steel wire and is formed into a skeleton with smaller mesh openings through a weaving process, and the outer layer steel wire mesh (63) is made of high-strength thick steel wire and is formed into a skeleton with larger mesh openings through a welding process.

5. The steel wire mesh skeleton reinforced polyethylene composite pipe according to claim 1, characterized in that: The protective layer (7) comprises an impact-resistant layer (71), the impact-resistant layer (71) being arranged on the surface of the outer polyethylene main layer (4), the surface of the impact-resistant layer (71) being provided with an anti-corrosion layer (72), and the surface of the anti-corrosion layer (72) being provided with a wear-resistant layer (73).

6. The steel wire mesh skeleton reinforced polyethylene composite pipe according to claim 5, characterized in that: The impact-resistant layer (71) is a polyurethane elastomer coating and is evenly coated on the surface of the outer polyethylene main layer (4).

7. The steel wire mesh skeleton reinforced polyethylene composite pipe according to claim 5, characterized in that: The anti-corrosion layer (72) is made of polyurethane coating and is evenly coated on the surface of the impact-resistant layer (71).

8. The steel wire mesh skeleton reinforced polyethylene composite pipe according to claim 5, characterized in that: The wear-resistant layer (73) is composed of a ceramic coating and is evenly coated on the surface of the anti-corrosion layer (72).

9. The steel wire mesh skeleton reinforced polyethylene composite pipe according to claim 1, characterized in that: The cross section of the annular reinforcement ribs (2) is arranged in a trapezoidal shape, and the annular reinforcement ribs (2) are arranged on the surface of the composite pipe body (1) at intervals of 10-20 cm.

10. The steel wire mesh skeleton reinforced polyethylene composite pipe according to claim 1, characterized in that: A groove (8) is provided at the connection between the composite pipe body (1) and the annular reinforcing rib (2), and a plurality of connecting plates (9) are provided inside the groove (8). A plurality of glue injection holes (10) are provided in an annular shape inside the annular reinforcing rib (2), and the glue injection holes (10) are communicated with the groove (8). A sealing plug (11) is provided inside the glue injection hole (10).

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