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CN-121993665-A - Nonmetallic pipeline with heat preservation performance and manufacturing method thereof

CN121993665ACN 121993665 ACN121993665 ACN 121993665ACN-121993665-A

Abstract

The invention discloses a nonmetallic pipeline with heat preservation performance and a manufacturing method thereof, the nonmetallic pipeline comprises a nonmetallic pipe body, a heat preservation layer and a polyethylene outer protective pipe, wherein the heat preservation layer and the polyethylene outer protective pipe are coaxially sleeved outside the nonmetallic pipe body in sequence, a plurality of supports are sleeved outside the nonmetallic pipe body, the other free ends of the supports are abutted to the polyethylene outer protective pipe, the heat preservation layer is prepared by foaming and curing a heat preservation material, the heat preservation material comprises a component A and a component B, the component A comprises 1% -5% of ethylenediamine polyether, 0.5% -2.5% of triethanolamine trifluorotrichloroethane silicone oil and 5% -10% of B-trichloroethyl phosphate according to mass percentage, the balance is I-type flame retardant polyether, the component B comprises polyphenyl polyisocyanate, and the mass ratio of the component A to the component B is 1 (1-1.05). The nonmetallic pipeline has good heat preservation effect.

Inventors

  • Shao Zhicui
  • NIU ZHENYU
  • LI YONGJUN
  • LIU JIAMING
  • WANG QING
  • SUN YINJUAN
  • QIAO GUANGHUI
  • ZHOU ZIDONG
  • CHANG ZHIBO
  • PANG YONGLI
  • GUO YAHONG
  • SHEN FURONG
  • LIU XIAOLI

Assignees

  • 长庆工程设计有限公司
  • 中国石油天然气股份有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (10)

  1. 1. The nonmetal pipeline with the heat preservation performance is characterized by comprising a nonmetal pipe body (1), a heat preservation layer (2) and a polyethylene outer protection pipe (3) which are coaxially sleeved outside the nonmetal pipe body (1) in sequence, wherein a plurality of brackets (4) are sleeved outside the nonmetal pipe body (1), and the other free ends of the brackets (4) are abutted with the polyethylene outer protection pipe (3); The heat-insulating layer (2) is prepared by foaming and curing a heat-insulating material; the heat insulation material comprises a component A and a component B; According to the mass percentage, the component A comprises 1-5% of ethylenediamine polyether, 0.5-2.5% of triethanolamine trifluorotrichloroethane silicone oil, 5-10% of B-trichloroethyl phosphate and the balance of I-type fire-retardant polyether; The component B comprises polyphenyl polyisocyanate; when the adhesive is used, the mass ratio of the component A to the component B is 1 (1-1.05).
  2. 2. A non-metallic pipe with thermal insulation according to claim 1, characterized in that the support (4) comprises a support ring (41) and several supports (42) circumferentially spaced along the support ring (41).
  3. 3. A non-metallic pipe with thermal insulation properties according to claim 2, characterized in that the inner diameter of the support ring (41) corresponds to the outer diameter of the non-metallic pipe body (1), and the height of the support (42) in the radial direction of the support ring (41) corresponds to the thickness of the thermal insulation layer (2).
  4. 4. The nonmetallic pipeline with heat preservation performance according to claim 2, characterized in that 4-10 supporting pieces (42) are uniformly arranged along the circumferential direction of the supporting ring (41) at intervals.
  5. 5. The nonmetallic pipeline with the heat preservation performance according to claim 2 is characterized in that one bracket (4) is arranged outside the nonmetallic pipeline body (1) at intervals of 0.5-2 m.
  6. 6. The method for manufacturing a nonmetallic pipeline with heat preservation performance as set forth in claim 1 to 5, which is characterized by comprising the following steps: S1, sleeving a plurality of supports (4) along the axial direction of a nonmetallic tube body (1), then extending the nonmetallic tube body (1) sleeved with the supports (4) into a polyethylene outer protective tube (3), enabling the free ends of the supports (4) to be abutted with the polyethylene outer protective tube (3), and fixing the nonmetallic tube body (1) and the polyethylene outer protective tube (3), wherein an insulating layer cavity is formed between the outer wall of the nonmetallic tube body (1) and the inner wall of the polyethylene outer protective tube (3); s2, injecting the heat-insulating material into the heat-insulating layer cavity, performing foaming treatment, and then performing curing treatment to obtain the nonmetallic pipeline with heat-insulating performance.
  7. 7. The method for manufacturing a non-metal pipeline with heat preservation performance according to claim 6, wherein in the foaming treatment process, the foaming temperature is 18-30 ℃, the holding time is 38-40 s, and the fiber time is 206-210 s.
  8. 8. The method for manufacturing a nonmetallic pipeline with heat preservation performance according to claim 6, wherein the free polishing density is monitored to be 33-35 kg/m 3 in the curing process.
  9. 9. The method for manufacturing a nonmetallic pipeline with heat preservation performance according to claim 6, wherein in the curing treatment process, the curing time is 2-4 hours at room temperature.
  10. 10. The method for manufacturing a non-metal pipe with heat preservation performance according to claim 6, wherein in the step S1, before a plurality of brackets (4) are sleeved along the axial direction of the non-metal pipe body (1), the surface of the non-metal pipe body (1) is cleaned, and the cleaning process is specifically to wash the surface of the non-metal pipe body (1).

Description

Nonmetallic pipeline with heat preservation performance and manufacturing method thereof Technical Field The invention belongs to the technical field of nonmetal pipeline heat preservation engineering, and relates to a nonmetal pipeline with heat preservation performance and a manufacturing method thereof. Background Nonmetallic pipelines, by virtue of their continued advancement in manufacturing and installation technology, have demonstrated a wide range of application potential in a variety of fields. In particular, in energy chemical industry, municipal construction and our daily lives, nonmetallic pipelines gradually replace part of the positions of metallic pipelines with their unique advantages. However, when nonmetallic pipelines are applied to specific scenes such as oilfield gathering and transportation, the heat preservation problem becomes a key for improving the transportation efficiency of the nonmetallic pipelines. At present, the heat preservation mode of the nonmetallic pipeline mainly uses the heat preservation technology of the metallic pipeline. This includes coating composite silicate, rock wool, microporous calcium silicate and other pipe shells in situ, foaming polyurethane foam in situ and other methods. These methods meet the insulation requirements of nonmetallic pipelines to some extent, but also expose some problems. Because the single delivery length of nonmetallic pipelines is usually far from that of nonmetallic pipelines, and a coil transportation mode is adopted, the traditional metallic pipe shell heat preservation or in-situ foaming mode is challenged in practical application. Particularly, the mode of bundling the heat-insulating pipe shell on site has low cost of raw materials, but high cost of labor on site and difficult lasting heat-insulating effect. Because the elastic bearing capacity difference between the heat-insulating pipe shell and the nonmetallic pipeline body is huge, the heat-insulating layer is often broken and invalid after a period of operation, so that the heat-insulating performance and the service life of the pipeline are affected. To solve these problems, the industry has begun to search for new ways of insulating heat. Wherein, the hollow PE anti-corrosion heat-insulation pipe is an innovative solution. The end face shape of the pipeline is designed to be that a plurality of hollows are symmetrically distributed relative to a central hollow, and the design not only enhances the rigidity of the pipeline body, but also plays roles of internal and external corrosion prevention and heat preservation. More importantly, the hollow PE anti-corrosion heat-insulation pipe and the pipe body are molded at one time, the production process is simple, and the cost is low. However, the pipeline has certain limitation, and is mainly suitable for pipeline transportation engineering in middle-low pressure and non-alpine regions at present. Disclosure of Invention Aiming at the problems in the prior art, the invention provides a nonmetallic pipeline with heat preservation performance and a manufacturing method thereof, thereby solving the technical problem that the nonmetallic pipeline in the prior art has poor heat preservation effect. The invention is realized by the following technical scheme: The nonmetallic pipeline with the heat preservation performance comprises a nonmetallic pipe body, a heat preservation layer and a polyethylene outer protection pipe, wherein the heat preservation layer and the polyethylene outer protection pipe are coaxially sleeved outside the nonmetallic pipe body in sequence; the heat-insulating layer is prepared by foaming and curing a heat-insulating material; the heat insulation material comprises a component A and a component B; According to the mass percentage, the component A comprises 1-5% of ethylenediamine polyether, 0.5-2.5% of triethanolamine trifluorotrichloroethane silicone oil, 5-10% of B-trichloroethyl phosphate and the balance of I-type fire-retardant polyether; The component B comprises polyphenyl polyisocyanate; when the adhesive is used, the mass ratio of the component A to the component B is 1 (1-1.05). Preferably, the bracket comprises a support ring and a plurality of support pieces circumferentially spaced along the support ring. Preferably, the inner diameter of the support ring is consistent with the outer diameter of the nonmetallic tube body, and the height of the support piece along the radial direction of the support ring is consistent with the thickness of the heat insulation layer. Preferably, 4-10 supporting pieces are uniformly arranged along the circumferential direction of the supporting ring at intervals. Preferably, one support is arranged outside the nonmetallic tube body at intervals of 0.5-2 m. The manufacturing method of the nonmetallic pipeline with the heat preservation performance comprises the following steps of: S1, sleeving a plurality of brackets along the axial direction of a non-metal pipe