High-ring-stiffness thermal-state winding metal framework structure wall pipe

Abstract

The utility model discloses a high-ring-stiffness thermal-state winding metal framework structure wall pipe, and aims to solve the problems that a metal net is adopted as a middle layer in a winding pipe in the prior art, the metal net is not easy to shape and is easily extruded by polyolefin of an inner layer and an outer layer, so that the middle layer is eccentric and even leaks outwards. The technical problem is solved through the following technical scheme that the pipe comprises a pipe body inner layer polyolefin layer, a pipe body middle metal belt layer and a pipe body outer layer polyolefin layer which are sequentially arranged from inside to outside, wherein the pipe body mesh metal belt layer is formed by spirally welding metal belts; a rib pipe is spirally wound on the outer side of the middle metal belt layer of the pipe body, and the rib pipe is wrapped by polyolefin on the outer layer of the pipe body. The middle layer is formed by welding the metal belts, the concentricity of the middle layer is ensured by a welding positioning device in actual production, and the wall thickness of polyolefin on the inner layer and the outer layer can be ensured; after welding, a spirally wound framework is also formed at a welding seam, and the inner and outer plastic layers are uniform in wall thickness.

Description

Technical Field

[0001] The utility model relates to the technical field of wall tubes, and more specifically to a wall tube with a high ring rigidity hot-wound metal skeleton structure. Background Art

[0002] Hot winding high-density polyethylene (HDPE) winding structural wall pipe, also known as "carat pipe". This pipe is made of high-density polyethylene resin as the main raw material, adopts hot winding molding process, and uses polypropylene (PP) single-wall corrugated pipe as the reinforced rib pipe support structure. It is the main pipe material of choice in the current buried sewage and drainage market.

[0003] At present, the biggest problem of buried high-density polyethylene (HDPE) winding structure wall pipe in application is that the ring stiffness is relatively low, the resistance to external pressure is relatively poor, and the construction requirements are high. Even with the spirally wound reinforced rib pipe structure, the pipe body is prone to deformation, resulting in dents and instability, and even landslides, resulting in serious economic losses.

[0004] Chinese patent announcement number CN209196309U, announcement date August 2, 2019, the name of the utility model is a winding reinforced tube that is easy to install and has a built-in metal mesh. The application discloses a winding tube, which has a metal mesh in the middle layer to increase its rigidity and thus durability. However, the metal mesh has little effect on increasing the rigidity and external pressure resistance of the pipe, and can only help the pipe enhance its internal pressure resistance. In addition, the metal mesh production process is not easy to shape, and in actual production, it is easily squeezed by the inner and outer layers of polyolefins, resulting in the middle layer being eccentric, and even the risk of leakage of the middle layer. Utility Model Content

[0005] The utility model overcomes the problem that the metal mesh is used as the middle layer inside the winding tube in the prior art, but the metal mesh has little effect on increasing the rigidity and external pressure resistance of the tube and can only help the tube to enhance its internal pressure resistance. In addition, the metal mesh is not easy to shape during the production process and is easily squeezed by the inner and outer layers of polyolefin in actual production, resulting in eccentricity of the middle layer and even leakage of the middle layer. A high-ring-rigidity hot-wound metal skeleton structure wall tube is provided, which has high rigidity and is not prone to eccentricity, so that the concentricity of the middle layer can be guaranteed, thereby ensuring the uniform wall thickness of the inner and outer plastic layers.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a high ring stiffness hot-wound metal skeleton structure wall tube, comprising: an inner polyolefin layer of the tube body, an intermediate metal belt layer of the tube body and an outer polyolefin layer of the tube body arranged in sequence from the inside to the outside, the mesh metal belt layer of the tube body is formed by spiral welding of metal belts, and the metal belts are evenly distributed with through holes.

[0007] The middle layer of the utility model is welded by metal strips. In actual production, there is a welding positioning device to ensure the concentricity of the middle layer, which can ensure the wall thickness of the inner and outer layers of polyolefin; after welding, a spirally wound skeleton is also formed at the weld, and the wall thickness of the inner and outer plastic layers is uniform. The rib tube is originally used as a supporting structure to prevent the tube body from being deformed; the ring stiffness is stronger, and products with higher ring stiffness levels can be made.

[0008] Preferably, a rib tube is spirally wound around the outer side of the middle metal belt layer of the pipe body, and the rib tube is covered by a polyolefin layer on the outer layer of the pipe body.

[0009] The rib tube is originally used as a supporting structure to prevent the tube body from deforming easily; the stronger the ring stiffness, the more products with higher ring stiffness grades can be made.

[0010] Preferably, the fin tube is arranged along the weld seam of the metal strip.

[0011] The present application arranges the rib tube on the outside of the spiral weld of the metal strip, so that when the tube body as a whole is under pressure, the rib tube can reduce the pressure at the position of the spiral weld.

[0012] Preferably, annular grooves are evenly distributed on the outer side wall of the rib tube along its axial direction, and annular convex rings are formed between adjacent annular grooves.

[0013] An annular convex ring is formed between adjacent annular grooves. The annular groove and the annular convex ring cooperate to make the rib tube a bellows, which can further improve the strength of the rib tube, thereby improving the strength of the overall tube body.

[0014] Preferably, the rib tube is a rectangular rib tube having a rectangular cross-section, the rectangular rib tube comprising a rectangular inner side edge arranged close to the inner polyolefin layer of the tube body, a rectangular outer side edge away from the inner polyolefin layer of the tube body, and supporting side edges supported at both ends of the rectangular inner side edge and the rectangular outer side edge.

[0015] The supported sides can withstand greater pressure.

[0016] Preferably, the rib tube is a trapezoidal rib tube, the cross section of the trapezoidal rib tube is an isosceles trapezoid, the trapezoidal rib tube comprises a bottom side, a top side and an isosceles side, and the bottom side corresponds to the spiral weld of the metal strip.

[0017] The isosceles side edges play a supporting role, so that the pressure on the top side edges can be transferred to the isosceles side edges, and the spiral weld is arranged between the isosceles side edges, so as to reduce the pressure on the spiral weld of the metal strip.

[0018] Preferably, the rib tube is a U-shaped rib tube having a U-shaped cross section, comprising a U-shaped side and a first opening side arranged at the opening position of the U-shaped side, and the first opening side corresponds to the spiral weld of the metal strip.

[0019] The U-shaped side plays a supporting role, so that the pressure can be transferred to the two ends of the U-shaped side, and the spiral weld is arranged between the positions of the U-shaped side openings, thereby reducing the pressure on the spiral weld of the metal strip.

[0020] Preferably, the rib tube is a V-shaped rib tube, the cross section of the V-shaped rib tube is V-shaped, the V-shaped rib tube includes a V-shaped side and a second opening side arranged at the opening position of the V-shaped side, and the second opening side corresponds to the spiral weld of the metal strip.

[0021] The V-shaped side plays a supporting role, so that the pressure can be transferred to the two ends of the V-shaped side, and the spiral weld is arranged between the positions of the V-shaped side openings, thereby reducing the pressure on the spiral weld of the metal strip.

[0022] Preferably, the material of the fin tube is a PP single-wall corrugated tube or a metal corrugated tube.

[0023] Compared with the prior art, the utility model has the following beneficial effects: the middle layer of the utility model is welded by metal strips, and in actual production, a welding positioning device is used to ensure the concentricity of the middle layer, which can ensure the wall thickness of the inner and outer polyolefin layers; after welding, a spirally wound skeleton is also formed at the weld, and the wall thickness of the inner and outer plastic layers is uniform. The ribbed tube is originally used as a supporting structure to prevent the tube body from being deformed; the ring stiffness is stronger, and products with a higher ring stiffness level can be made. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of Example 1 of the utility model.

[0025] Figure 2 It is a structural schematic diagram of Example 2 of the present utility model.

[0026] Figure 3 It is a structural schematic diagram of Example 3 of the present utility model.

[0027] Figure 4 It is a structural schematic diagram of Example 4 of the present utility model.

[0028] Figure 5 It is a structural schematic diagram of Example 5 of the present utility model.

[0029] Figure 6 It is a schematic structural diagram of the utility model when no rib tube is provided.

[0030] In the figure: 1. The inner layer of the tube is a polyolefin layer.

[0031] 2. The middle metal belt layer of the pipe body, 21. The metal belt, 22. The through-hole, 23. The weld,

[0032] 3. The outer layer of the tube body is a polyolefin layer, 31. Rib tube;

[0033] 4. rectangular rib tube, 41. rectangular inner side, 42. rectangular outer side, 43. supporting side;

[0034] 5. Trapezoidal rib tube, 51. bottom side, 52. top side, 53. isosceles side;

[0035] 6. U-shaped rib tube, 61. U-shaped side, 62. first opening side;

[0036] 7. V-shaped rib tube, 71. V-shaped side, 72. second opening side. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0038] Example 1: Reference Figure 1 and Figure 6 As shown, a high ring stiffness hot-wound metal skeleton structure wall tube comprises: an inner polyolefin layer 1 of the tube body, an intermediate metal belt layer 2 of the tube body and an outer polyolefin layer 3 of the tube body, which are arranged in sequence from the inside to the outside; the mesh metal belt layer of the tube body is formed by spiral welding of metal belts 21, and the metal belts are evenly distributed with through belt holes 22; after the hot polyolefin material is squeezed by external force, the through belt holes 22 and the materials of the inner and outer polyolefin layers of the tube body are fused into one; a rib tube 31 is spirally wound on the outer side of the intermediate metal belt layer 2 of the tube body, and the rib tube 31 is covered by the outer polyolefin layer 3 of the tube body.

[0039] The fin tube 31 is covered by the outer polyolefin layer 3 of the tube body, which can further improve the ring stiffness of the tube material, reduce the weight of the tube material, and save the amount of polyolefin material.

[0040] The inner polyolefin layer of the pipe body and the outer polyolefin layer of the pipe body can be made of PE material layer, PA material layer, PBT material layer, PET material layer, PP material layer, or one of thermoplastic plastic materials. The middle metal belt layer of the pipe body is formed by spiral welding of metal belts, and the metal belt can be a metal belt of a material such as a mesh steel belt or a mesh aluminum belt directly formed by spiral welding. The welding method can be any one of lap welding, butt welding or caulking welding. By welding the metal belt, a middle metal belt layer of the pipe body with a mesh is formed.

[0041] The outer wall of the rib tube 31 is evenly distributed with annular grooves along its axial direction, and annular convex rings are formed between adjacent annular grooves. The annular grooves and the annular convex rings cooperate to make the rib tube a bellows, which can further improve the strength of the rib tube. Thereby improving the strength of the overall tube body. The material of the rib tube can be a metal bellows, or the material of the rib tube is a PP single-wall bellows.

[0042] The processing technology of the utility model is as follows: firstly, an inner layer of polyolefin is wound on a roller mold, then a metal belt is spirally wound and welded, then polyolefin is wound on the outside of the metal belt as an outer layer, and finally a rib tube is spirally wound on the outside of the outer layer of polyolefin.

[0043] The beneficial effects of the utility model are:

[0044] 1. Previously, the middle layer was a metal mesh or glass fiber. The middle layer of the utility model is made of a porous metal belt, which is spirally wound and welded. After welding, the metal belt layer can withstand higher internal and external pressures.

[0045] 2. Metal mesh and glass fiber cannot be welded, and only the inner and outer plastic layers are connected by hot melt. In the actual production process, the metal mesh or glass fiber will be eccentric when it is wound due to its poor rigidity and the squeeze of the inner and outer plastic layers, and the concentricity of the middle layer cannot be guaranteed. At the same time, there is a risk of the metal mesh or glass fiber leaking to the outer wall or the inner wall. If the metal mesh leaks out of the pipe, the service life will be greatly shortened due to environmental factors, which may easily cause road collapse accidents and unnecessary economic losses. The porous metal belt used in the utility model is spirally welded. In actual production, there is a welding positioning device to ensure the concentricity of the middle layer and the wall thickness of the inner and outer layers of polyolefin. After welding, a spirally wound skeleton is also formed at the weld, and the wall thickness of the inner and outer plastic layers is uniform.

[0046] 4. Metal mesh and glass fiber cannot be welded, and adding this layer of metal mesh does not increase the actual ring stiffness much; however, the utility model is formed by spiral welding of porous metal belts, and the forming is stable. The spiral weld forms a skeleton, which greatly increases the ring stiffness of the pipe.

[0047] 5. The rib tube is used as a supporting structure to prevent the tube body from deformation. The rib tube is easy to bend. Compared with the PP single-wall rib tube, the ring stiffness is stronger and products with higher ring stiffness level can be made.

[0048] 6. After using metal finned tubes, compared with PP single-wall finned tubes, under the premise of the same weight per meter, the polyolefin used is lighter, and under the condition of the same ring stiffness, the production cost of the pipe will be reduced. Under the condition of the same weight per meter, the pipe has a stronger ability to withstand external pressure.

[0049] 7. The ring stiffness of traditional and previously improved products is not easy to meet the requirements of national standards, especially for large-diameter products. The ring stiffness of the product of the utility model is easier to meet the requirements of national standards, especially for large-diameter products.

[0050] 8. The ring stiffness of the utility model can meet the requirements of national standards and can even reach SN20 or higher. Under the conditions of the same caliber and the same ring stiffness, the manufacturing cost is lower.

[0051] Example 2: Reference Figure 2 As shown, a high ring stiffness hot-wound metal skeleton structure wall tube comprises: an inner polyolefin layer of the tube body, an intermediate metal belt layer of the tube body and an outer polyolefin layer of the tube body which are arranged in sequence from the inside to the outside, the mesh metal belt layer of the tube body is formed by spirally welding metal belts, and the metal belts are evenly distributed with through belt holes; a rib tube is spirally wound on the outer side of the intermediate metal belt layer of the tube body, and the rib tube is covered by the outer polyolefin layer of the tube body.

[0052] The inner polyolefin layer of the pipe body and the outer polyolefin layer of the pipe body can be made of PE material layer, PA material layer, PBT material layer, PET material layer, PP material layer, or one of thermoplastic plastic materials. The middle metal belt layer of the pipe body is formed by spiral welding of metal belts, and the metal belt can be a metal belt of a material such as a mesh steel belt or a mesh aluminum belt directly formed by spiral welding. The welding method can be any one of lap welding, butt welding or caulking welding. By welding the metal belt, a middle metal belt layer of the pipe body with a mesh is formed.

[0053] The metal strip is spirally welded, and the weld 23 formed is also spiral. Since problems are more likely to occur at the weld position in the middle metal strip layer of the welded pipe body, the present application arranges the rib tube on the outside of the spiral weld of the metal strip so that when the pipe body as a whole is under pressure, the rib tube can reduce the pressure at the spiral weld position.

[0054] The outer wall of the rib tube is evenly distributed with annular grooves along its axial direction, and annular convex rings are formed between adjacent annular grooves. The annular grooves and the annular convex rings cooperate to make the rib tube a bellows, which can further improve the strength of the rib tube, thereby improving the strength of the overall tube body.

[0055] The rib tube is a rectangular rib tube 4, the cross section of which is a rectangle. The rectangular rib tube includes a rectangular inner side edge 41 arranged close to the inner polyolefin layer of the tube body, a rectangular outer side edge 42 away from the inner polyolefin layer of the tube body, and supporting side edges 43 supported at both ends of the rectangular inner side edge and the rectangular outer side edge.

[0056] The processing technology of the utility model is as follows: firstly, an inner layer of polyolefin is wound on a roller mold, then a metal belt is spirally wound and welded, then polyolefin is wound on the outside of the metal belt as an outer layer, and finally a rib tube is spirally wound on the outside of the outer layer of polyolefin.

[0057] The beneficial effects of the utility model are:

[0058] 1. Previously, the middle layer was a metal mesh or glass fiber. The middle layer of the utility model adopts a porous metal belt, and the metal belt layer can withstand higher pressure.

[0059] 2. Metal mesh and glass fiber cannot be welded, and only the inner and outer plastic layers are connected by hot melt. In the actual production process, the metal mesh or glass fiber will be eccentric when it is wound due to its poor rigidity and the squeeze of the inner and outer plastic layers, and the concentricity of the middle layer cannot be guaranteed. At the same time, there is a risk of the metal mesh or glass fiber leaking to the outer wall or the inner wall. If the metal mesh leaks out of the pipe, the service life will be greatly shortened due to environmental factors, which may easily cause road collapse accidents and unnecessary economic losses. The porous metal belt used in the utility model is spirally welded. In actual production, there is a welding positioning device to ensure the concentricity of the middle layer and the wall thickness of the inner and outer layers of polyolefin. After welding, a spirally wound skeleton is also formed at the weld, and the wall thickness of the inner and outer plastic layers is uniform.

[0060] 4. Metal mesh and glass fiber cannot be welded, and adding this layer of metal mesh does not increase the actual ring stiffness much; however, the utility model is formed by spiral welding of porous metal belts, and the forming is stable. The spiral weld forms a skeleton, which greatly increases the ring stiffness of the pipe.

[0061] 5. The rib tube is used as a supporting structure to prevent the tube body from deformation. The rib tube is easy to bend. Compared with the PP single-wall rib tube, the ring stiffness is stronger and products with higher ring stiffness level can be made.

[0062] 6. After using metal finned tubes, compared with PP single-wall finned tubes, under the premise of the same weight per meter, the polyolefin used is lighter, and under the condition of the same ring stiffness, the production cost of the pipe will be reduced. Under the condition of the same weight per meter, the pipe has a stronger ability to withstand external pressure.

[0063] 7. The ring stiffness of traditional and previously improved products is not easy to meet the requirements of national standards, especially for large-diameter products. The ring stiffness of the product of the utility model is easier to meet the requirements of national standards, especially for large-diameter products.

[0064] 8. The ring stiffness of the utility model can meet the requirements of national standards and can even reach SN20 or higher. Under the conditions of the same caliber and the same ring stiffness, the manufacturing cost is lower.

[0065] Example 3: Reference Figure 3 As shown, the structure of this embodiment is similar to that of embodiment 1 or embodiment 2, except that the rib tube is a trapezoidal rib tube 5, the cross section of the trapezoidal rib tube is an isosceles trapezoid, the trapezoidal rib tube includes a bottom side 51, a top side 52 and an isosceles side 53, and the bottom side corresponds to the spiral weld of the metal strip.

[0066] The isosceles side edges play a supporting role, so that the pressure on the top side edges can be transferred to the isosceles side edges, and the spiral weld is arranged between the isosceles side edges, so as to reduce the pressure on the spiral weld of the metal strip.

[0067] Example 4: Reference Figure 4 As shown, this embodiment is similar in structure to Embodiment 1 or Embodiment 2, except that the rib tube is a U-shaped rib tube 6, the cross section of the U-shaped rib tube is U-shaped, the U-shaped rib tube includes a U-shaped side 61 and a first opening side 62 arranged at the opening position of the U-shaped side, and the first opening side corresponds to the spiral weld of the metal strip.

[0068] The U-shaped side plays a supporting role, so that the pressure can be transferred to the two ends of the U-shaped side, and the spiral weld is arranged between the positions of the U-shaped side openings, thereby reducing the pressure on the spiral weld of the metal strip.

[0069] Example 5: Reference Figure 5 As shown, this embodiment is similar in structure to Embodiment 1 or Embodiment 2, except that the rib tube is a V-shaped rib tube 7, the cross section of the V-shaped rib tube is V-shaped, the V-shaped rib tube includes a V-shaped side edge 71 and a second opening side edge 72 arranged at the opening position of the V-shaped side edge, and the second opening side edge corresponds to the spiral weld of the metal strip.

[0070] The V-shaped side plays a supporting role, so that the pressure can be transferred to the two ends of the V-shaped side, and the spiral weld is arranged between the positions of the V-shaped side openings, thereby reducing the pressure on the spiral weld of the metal strip.

[0071] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A high ring stiffness hot-wound metal skeleton structure wall tube, characterized in that: include: The inner polyolefin layer of the pipe body, the middle metal belt layer of the pipe body and the outer polyolefin layer of the pipe body are arranged in sequence from the inside to the outside. The mesh metal belt layer of the pipe body is formed by spiral welding of metal belts, and the metal belts are evenly distributed with through holes.

2. The high ring stiffness hot-wound metal skeleton structure wall tube according to claim 1 is characterized in that: The outer side of the metal belt layer in the middle of the pipe body is spirally wound with a rib tube, and the outer polyolefin layer of the pipe body covers the rib tube.

3. The high ring stiffness hot-wound metal skeleton structure wall tube according to claim 2 is characterized in that: The ribbed tubes are arranged along the weld seams of the metal strips.

4. The high ring stiffness hot-wound metal skeleton structure wall tube according to claim 2 is characterized in that: The outer side wall of the rib tube is evenly distributed with annular grooves along the axial direction thereof, and annular convex rings are formed between adjacent annular grooves.

5. The high ring stiffness hot-wound metal skeleton structure wall tube according to claim 2, 3 or 4, characterized in that: The rib tube is a rectangular rib tube with a rectangular cross-section. The rectangular rib tube includes a rectangular inner side edge arranged close to the inner polyolefin layer of the tube body, a rectangular outer side edge away from the inner polyolefin layer of the tube body, and supporting side edges supported at both ends of the rectangular inner side edge and the rectangular outer side edge.

6. The high ring stiffness hot-wound metal skeleton structure wall tube according to claim 2, 3 or 4, characterized in that: The rib tube is a trapezoidal rib tube, the cross section of which is an isosceles trapezoid. The trapezoidal rib tube comprises a bottom side, a top side and an isosceles side, and the bottom side corresponds to the spiral weld of the metal strip.

7. The high ring stiffness hot-wound metal skeleton structure wall tube according to claim 2, 3 or 4, characterized in that: The rib tube is a U-shaped rib tube with a U-shaped cross section. The U-shaped rib tube includes a U-shaped side and a first opening side arranged at the opening position of the U-shaped side. The first opening side corresponds to the spiral weld of the metal strip.

8. The high ring stiffness hot-wound metal skeleton structure wall tube according to claim 2, 3 or 4, characterized in that: The rib tube is a V-shaped rib tube, the cross section of the V-shaped rib tube is V-shaped, the V-shaped rib tube comprises a V-shaped side and a second opening side arranged at the opening position of the V-shaped side, and the second opening side corresponds to the spiral weld of the metal strip.

9. The high ring stiffness hot-wound metal skeleton structure wall tube according to claim 1 is characterized in that: The outer polyolefin layer of the tube body is made of PP material.

10. The high ring stiffness hot-wound metal skeleton structure wall tube according to claim 2, 3 or 4, characterized in that: The material of the fin tube is PP single-wall corrugated tube or metal corrugated tube.

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