Steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting

Abstract

The utility model discloses a steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting which comprises a steel skeleton, an ultra-high molecular weight polyethylene inner pipe body and a polyethylene outer pipe body, the steel skeleton comprises a first steel pipe and a second steel pipe, and the second steel pipe is connected to one side of the first steel pipe to form the steel skeleton of a three-way structure. The ultrahigh molecular weight polyethylene inner pipe body comprises a first inner pipe and a second inner pipe, the first inner pipe is embedded in the first steel pipe, the second inner pipe is embedded in the second steel pipe and connected with the first inner pipe, and the polyethylene outer pipe body comprises a first outer pipe and a second outer pipe. The first outer pipe is arranged on the outer side of the first steel pipe in a wrapping mode, and the second outer pipe is arranged on the outer side of the second steel pipe in a wrapping mode and connected with the first outer pipe. According to the mode, the steel framework reinforced ultra-high molecular weight polyethylene three-way pipe fitting has the advantages that the structural strength is improved, the service life is prolonged, electric hot melting connection can be realized, the construction is quick, and the operation is reliable.

Description

Technical Field

[0001] The utility model relates to the field of pipe fittings, in particular to a steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting. Background Art

[0002] Ultra-high molecular weight polyethylene has super wear resistance and self-lubrication, and has relatively high strength and stable chemical properties. The pipes made from it are relatively wear-resistant and can be used to transport a variety of liquids or powders, thus extending the service life of the pipeline.

[0003] At present, ultra-high molecular weight polyethylene tee pipe fittings are usually welded and formed by ultra-high molecular weight polyethylene pipe sections and connected by flanges. If the pipeline pressure requirement is high, it can be lined with steel pipes. Therefore, the outer dimensions of the tee pipe fittings are large and inconsistent, and it is impossible to achieve electric fusion connection between pipes and pipe fittings, and between pipe fittings. In particular, it does not meet the design and design specification requirements under the following working conditions:

[0004] 1) Process pipelines laid in trenches and pipe racks with small space and close arrangement;

[0005] 2) When laying underground, the design specifications require that an inspection well must be added at the flange connection, which is expensive and needs to be improved. Utility Model Content

[0006] The main technical problem solved by the utility model is to provide a steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting, which improves the structural strength, can be connected by electric hot melt, and improves the construction convenience and operation safety.

[0007] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting, including: a steel skeleton, an ultra-high molecular weight polyethylene inner tube body and a polyethylene outer tube body, the steel skeleton includes a first steel pipe and a second steel pipe, the second steel pipe is connected to one side of the first steel pipe to form a steel skeleton with a three-way structure, the ultra-high molecular weight polyethylene inner tube body includes a first inner tube and a second inner tube, the first inner tube is embedded in the first steel pipe, the second inner tube is embedded in the second steel pipe and connected to the first inner tube, the polyethylene outer tube body includes a first outer tube and a second outer tube, the first outer tube is wrapped on the outside of the first steel pipe, and the second outer tube is wrapped on the outside of the second steel pipe and connected to the first outer tube.

[0008] In a preferred embodiment of the present invention, positioning holes are respectively arranged at intervals on the outer walls of the first steel tube and the second steel tube.

[0009] In a preferred embodiment of the present invention, the second steel pipe is vertically connected to the middle part of the first steel pipe.

[0010] In a preferred embodiment of the present invention, the first inner tube and the second inner tube adopt an integrated ultra-high molecular weight polyethylene three-way structure.

[0011] In a preferred embodiment of the present invention, the first outer tube and the second outer tube adopt an integrated polyethylene three-way structure.

[0012] In a preferred embodiment of the present invention, the end of the first inner tube is integrally provided with a first extension tube located in front of the end of the first steel tube.

[0013] In a preferred embodiment of the present invention, the inner diameter of the first extension tube is the same as the inner diameter of the first inner tube, a second extension tube wrapped around the outside of the first extension tube is provided at the end of the first outer tube, and the outer diameter of the first extension tube, the inner diameter of the second extension tube and the inner diameter of the first outer tube are the same.

[0014] In a preferred embodiment of the utility model, the end of the second inner tube is integrally provided with a third extension tube located in front of the end of the second steel tube, the inner diameter of the third extension tube is the same as the inner diameter of the second inner tube, and the end of the second outer tube is provided with a fourth extension tube wrapped around the outside of the third extension tube, and the inner diameter of the second outer tube, the outer diameter of the third extension tube and the inner diameter of the fourth extension tube are the same.

[0015] In a preferred embodiment of the utility model, a cylindrical first thickened layer is integrally provided on the outer circle of the first outer tube, and the outer diameter of the first thickened layer is larger than the outer diameter of the first outer tube to form a first step at both ends of the first thickened layer; a cylindrical second thickened layer is integrally provided on the outer circle of the second outer tube close to one end of the first outer tube, and the outer diameter of the second thickened layer is larger than the outer diameter of the second outer tube to form a second step.

[0016] In a preferred embodiment of the present invention, the first thickened layer is located at the connection between the first outer tube and the second outer tube, and the length of the first thickened layer is greater than the outer diameter of the second outer tube, and the first thickened layer is connected to the second thickened layer.

[0017] The beneficial effects of the utility model are as follows: the steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting pointed out by the utility model can pre-set the steel skeleton in the mold of the ultra-high molecular weight polyethylene inner pipe body, and press-form the ultra-high molecular weight polyethylene inner pipe body, which is convenient for production, and can realize the embedded fixation of the steel skeleton on the outer wall of the ultra-high molecular weight polyethylene inner pipe body, thereby improving the structural strength, and then use the polyethylene outer pipe body for covering, avoiding the exposure and corrosion problems of the steel skeleton, and having a long service life. Moreover, the polyethylene outer pipe body can be connected by electric hot-melt connection without flanges, thereby improving the convenience of on-site connection construction of the pipe fittings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0019] Figure 1 This is a structural schematic diagram of a preferred embodiment of a steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting of the utility model;

[0020] Figure 2 This is a structural schematic diagram of another preferred embodiment of a steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting of the utility model;

[0021] Figure 3 yes Figure 1 or Figure 2 Schematic diagram of the matching structure of the steel skeleton and the ultra-high molecular weight polyethylene inner tube;

[0022] Figure 4 yes Figure 1 or Figure 2 Schematic diagram of the structure of the steel skeleton. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1~Figure 4 , the utility model embodiment includes:

[0025] like Figure 1 The steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting shown includes: a steel skeleton 2, an ultra-high molecular weight polyethylene inner tube body 1 and a polyethylene outer tube body 3, the steel skeleton 2 includes a first steel tube 21 and a second steel tube 22, the second steel tube 22 is connected to one side of the first steel tube 21 to form a steel skeleton of a three-way structure, which can be fixed by welding, and the structure is firm. In this embodiment, the second steel tube 22 is vertically connected to the middle of the first steel tube 21 to form a T-shaped structure.

[0026] The ultra-high molecular weight polyethylene inner tube body 1 includes a first inner tube 11 and a second inner tube 12. The first inner tube 11 is embedded in the first steel tube 21, and the second inner tube 12 is embedded in the second steel tube 22 and connected to the first inner tube 11. In this embodiment, the first inner tube 11 and the second inner tube 12 adopt an integrated ultra-high molecular weight polyethylene tee structure to ensure the wear resistance inside the pipe fitting. The inner diameters of the first inner tube 11 and the second inner tube 12 are the same or different, forming a straight tee or a reducing tee pipe fitting, which has a wide range of applications.

[0027] like Figure 4 As shown, positioning holes 23 are arranged at intervals on the outer walls of the first steel tube 21 and the second steel tube 22, respectively. The positioning holes 23 are distributed in an array on the first steel tube 21 and the second steel tube 22, which can not only reduce the dead weight, but also improve the bonding strength between the steel skeleton 2 and the ultra-high molecular weight polyethylene inner tube body 1 and the polyethylene outer tube body 3. Since the first inner tube 11 and the second inner tube 12 adopt an integrated ultra-high molecular weight polyethylene structure, during the production process, the steel skeleton 2 is first pre-set in the mold of the ultra-high molecular weight polyethylene inner tube body 1, and the steel skeleton 2 is positioned by the mold, and then the ultra-high molecular weight polyethylene material is poured into the mold to press the ultra-high molecular weight polyethylene inner tube body 1, and the steel skeleton 2 is embedded and fixed on the outer wall of the ultra-high molecular weight polyethylene inner tube body 1, thereby improving the structural strength.

[0028] In addition, if Figure 3 As shown, during the pressing process of the ultra-high molecular weight polyethylene inner tube body 1, part of the ultra-high molecular weight polyethylene material enters the positioning hole 23 to form an ultra-high molecular weight polyethylene positioning column connected to the ultra-high molecular weight polyethylene inner tube body 1, thereby improving the bonding strength between the ultra-high molecular weight polyethylene inner tube body 1 and the steel skeleton 2.

[0029] The outer side of the steel skeleton 2 is exposed outside the ultra-high molecular weight polyethylene inner tube body 1. In order to avoid corrosion problems, the steel skeleton 2 needs to be protected. In this embodiment, the polyethylene outer tube body 3 includes a first outer tube 31 and a second outer tube 32. The first outer tube 31 is wrapped and arranged on the outer side of the first steel tube 21, and the second outer tube 32 is wrapped and arranged on the outer side of the second steel tube 22 and connected to the first outer tube 31. The first outer tube 31 and the second outer tube 32 adopt an integrated polyethylene tee structure, which can not only complete the covering and protection of the steel skeleton 2, but also facilitate electric hot melt connection, thereby improving the convenience of on-site connection construction of pipe fittings.

[0030] like Figure 1As shown, the end of the first inner tube 11 is integrally provided with a first extension tube 13 located in front of the end of the first steel tube 21. In this embodiment, the inner diameter of the first extension tube 13 is the same as the inner diameter of the first inner tube 11, and the transition is smooth, which reduces the obstruction when conveying materials. The end of the first outer tube 31 is provided with a second extension tube 33 wrapped around the outside of the first extension tube 13. The outer diameter of the first extension tube 13, the inner diameter of the second extension tube 33 and the inner diameter of the first outer tube 31 are the same, and the fit is tight. The first extension tube 13 can be used to limit the end of the first steel tube 21, thereby improving the axial stability of the first steel tube 21.

[0031] The end of the second inner tube 12 is integrally provided with a third extension tube 14 located in front of the end of the second steel tube 22. The inner diameter of the third extension tube 14 is the same as the inner diameter of the second inner tube 12, and the transition is smooth. The end of the second outer tube 32 is provided with a fourth extension tube 34 wrapped around the outside of the third extension tube 14. The inner diameter of the second outer tube 32 and the outer diameter of the third extension tube 14 are the same as the inner diameter of the fourth extension tube 34, and the fit is tight. The end of the second steel tube 22 can also be limited by the third extension tube 14, thereby improving the axial stability of the second steel tube 22.

[0032] In order to facilitate the electric hot melt connection, Figure 2 As shown, a cylindrical first thickening layer 35 is integrally provided on the outer circle of the first outer tube 31, and the outer diameter of the first thickening layer 35 is larger than the outer diameter of the first outer tube 31 to form first steps 36 at both ends of the first thickening layer 35, which is convenient for plugging and limiting with the hot melt connection sleeve. A first hot melt zone is formed between the first step 36 and the end of the first outer tube 31, and the length of the first steel tube 21 in the first hot melt zone is not less than half of the length of the first hot melt zone, ensuring the structural strength after connection.

[0033] A cylindrical second thickening layer 37 is integrally provided on the outer circle of the second outer tube 32 near one end of the first outer tube 31. The outer diameter of the second thickening layer 37 is larger than the outer diameter of the second outer tube 32 to form a second step 38. When the second outer tube 32 is plugged into the hot-melt connection sleeve, the second step 38 is used to limit the axial position. A second hot-melt zone is formed between the second step 38 and the end of the second outer tube 32. The length of the second steel tube 22 in the second hot-melt zone is not less than half of the length of the second hot-melt zone, which can ensure the structural strength after connection.

[0034] In this embodiment, the first thickened layer 35 is located at the connection between the first outer tube 31 and the second outer tube 32, and the length of the first thickened layer 35 is greater than the outer diameter of the second outer tube 32. The first thickened layer 35 is connected to the second thickened layer 38, thereby improving the structural strength of the connection between the first outer tube 31 and the second outer tube 32.

[0035] In summary, the utility model discloses a steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting, which has high structural strength, good wear resistance, wide application range, long service life, and convenient on-site electric hot-melt connection construction.

[0036] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting, characterized in that: include: A steel skeleton, an ultra-high molecular weight polyethylene inner tube body and a polyethylene outer tube body, the steel skeleton includes a first steel tube and a second steel tube, the second steel tube is connected to one side of the first steel tube to form a steel skeleton with a three-way structure, the ultra-high molecular weight polyethylene inner tube body includes a first inner tube and a second inner tube, the first inner tube is embedded in the first steel tube, the second inner tube is embedded in the second steel tube and connected to the first inner tube, the polyethylene outer tube body includes a first outer tube and a second outer tube, the first outer tube is wrapped around the outside of the first steel tube, the second outer tube is wrapped around the outside of the second steel tube and connected to the first outer tube.

2. The steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting according to claim 1, characterized in that: Positioning holes are respectively arranged at intervals on the outer walls of the first steel pipe and the second steel pipe.

3. The steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting according to claim 1, characterized in that: The second steel pipe is vertically connected to the middle part of the first steel pipe.

4. The steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting according to claim 1, characterized in that: The first inner tube and the second inner tube adopt an integrated ultra-high molecular weight polyethylene three-way structure.

5. The steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting according to claim 1, characterized in that: The first outer tube and the second outer tube adopt an integrated polyethylene three-way structure.

6. The steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting according to claim 1, characterized in that: The end of the first inner tube is integrally provided with a first extension tube located in front of the end of the first steel tube.

7. The steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting according to claim 6, characterized in that: The inner diameter of the first extension tube is the same as that of the first inner tube. The end of the first outer tube is provided with a second extension tube wrapped around the outside of the first extension tube. The outer diameter of the first extension tube, the inner diameter of the second extension tube and the inner diameter of the first outer tube are the same.

8. The steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting according to claim 1, characterized in that: The end of the second inner tube is integrally provided with a third extension tube located in front of the end of the second steel tube, and the inner diameter of the third extension tube is the same as the inner diameter of the second inner tube. The end of the second outer tube is provided with a fourth extension tube wrapped around the outside of the third extension tube, and the inner diameter of the second outer tube, the outer diameter of the third extension tube and the inner diameter of the fourth extension tube are the same.

9. The steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting according to claim 1, characterized in that: A cylindrical first thickened layer is integrally provided on the outer circle of the first outer tube, and the outer diameter of the first thickened layer is larger than the outer diameter of the first outer tube to form a first step at both ends of the first thickened layer; a cylindrical second thickened layer is integrally provided on the outer circle of the second outer tube near one end of the first outer tube, and the outer diameter of the second thickened layer is larger than the outer diameter of the second outer tube to form a second step.

10. The steel skeleton reinforced ultra-high molecular weight polyethylene three-way pipe fitting according to claim 9, characterized in that: The first thickened layer is located at the connection between the first outer tube and the second outer tube, and the length of the first thickened layer is greater than the outer diameter of the second outer tube, and the first thickened layer is connected to the second thickened layer.

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