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CN-121993680-A - Thermal insulation wear-resistant nonmetal connecting joint and preparation and connecting methods thereof

CN121993680ACN 121993680 ACN121993680 ACN 121993680ACN-121993680-A

Abstract

The invention discloses a heat-insulating wear-resistant nonmetal connecting joint and a preparation method and a connecting method thereof, wherein the heat-insulating wear-resistant nonmetal connecting joint comprises a hollow joint sleeve, a fiber reinforcement layer is arranged on the outer side of the joint sleeve, a resistance type sensing chip is arranged between the hollow joint sleeve and the fiber reinforcement layer, and the resistance type sensing chip is in wireless connection with a data processing end; the inside winding of joint sleeve is provided with the resistance wire, and resistance wire both ends are connected with the terminal, and the inner wall of joint sleeve is sleeve internal cone. The preparation method comprises the steps of placing thermoplastic plastic powder, masterbatch, polyolefin elastomer and carbon aerogel powder into a stirrer, stirring to obtain uniform mixed materials, sequentially passing the mixed materials through an extruder, a granulator and an injection molding machine to obtain a preparation joint, and finally winding glass fiber or basalt fiber-soaked vinyl resin on the outer surface of the preparation joint to form a fiber reinforced layer, so as to obtain the nonmetal connecting joint. The invention solves the problem of lower bearing capacity of the nonmetallic joint in the prior art, and has higher pressure resistance, heat preservation and wear resistance.

Inventors

  • GAO MANTONG
  • CHEN FENG
  • LIU YAMING
  • ZHAO MIAOMIAO
  • LIU DEJUN
  • LIANG HANG
  • Zhang Ayu

Assignees

  • 中油国家石油天然气管材工程技术研究中心有限公司
  • 中国石油天然气集团有限公司
  • 中国石油集团宝石管业有限公司

Dates

Publication Date
20260508
Application Date
20241108

Claims (10)

  1. 1. The heat-insulating wear-resistant nonmetal connecting joint is characterized by comprising a hollow joint sleeve (1), wherein a fiber reinforced layer (2) is wrapped on the outer surface of the joint sleeve (1), a resistance type sensing chip (5) is arranged between the joint sleeve (1) and the fiber reinforced layer (2), and the resistance type sensing chip (5) is in wireless connection with a data processing end; The inside winding of joint sleeve (1) is provided with resistance wire (11), and open at joint sleeve (1) and fibre enhancement layer (2) relative resistance wire (11) both ends has the conductive hole, wears to have terminal (4) in the conductive hole, and terminal (4) are connected with the both ends of resistance wire (11) respectively, and the inner wall of joint sleeve (1) is sleeve internal cone (3).
  2. 2. The heat-insulating wear-resistant nonmetallic connecting joint according to claim 1, characterized in that the taper of the sleeve inner conical surface (3) is 0.5-20 degrees.
  3. 3. The thermal insulation wear-resistant nonmetallic connection joint according to claim 1, characterized in that at least one pair of resistive sensing chips (5) is provided.
  4. 4. The heat-insulating wear-resistant nonmetallic connecting joint according to claim 1, characterized in that the fiber reinforcement layer (2) is formed by winding glass fiber or basalt fiber-impregnated vinyl resin onto the outer surface of the joint sleeve (1).
  5. 5. The preparation method of the heat-insulating wear-resistant non-metal connecting joint is characterized by being used for preparing the heat-insulating wear-resistant non-metal connecting joint according to any one of claims 1-4, and specifically comprising the following steps: step 1, respectively weighing the following raw materials in percentage by mass: 60-70% of thermoplastic plastic powder, 5-10% of masterbatch, 5-10% of polyolefin elastomer and 20% of carbon aerogel powder, wherein the total content of the raw materials is 100%; Step 2, placing thermoplastic plastic powder, masterbatch, polyolefin elastomer and carbon aerogel powder into a stirrer, and stirring to obtain uniform mixed materials; step 3, adding the mixed materials into a hopper of an extruder, and extruding to obtain a linear compound; Step 4, granulating the composite strip-shaped composite by a granulator to obtain composite particles; step 5, arranging a chip groove and an inner cone structure in an injection molding machine, performing injection molding on composite particles through the injection molding machine to obtain a joint sleeve (1), then placing the joint sleeve (1) into a wire distribution machine for winding and embedding a resistance wire (11), and then embedding a resistance sensing chip (5) into the groove to obtain a preparation joint; And 6, winding glass fiber or basalt fiber infiltrated vinyl resin on the outer surface of the preparation joint to form a fiber reinforced layer (2) so as to obtain the heat-insulating wear-resisting nonmetal connecting joint.
  6. 6. The method for preparing a heat-insulating wear-resistant nonmetallic connecting joint according to claim 5, wherein the rotating speed of the stirrer in the step 2 is 60-80 r/min, and the stirring time is 0.5-1 h.
  7. 7. The method for preparing a heat-insulating wear-resistant nonmetallic joint according to claim 5, wherein the operation temperature of the extruder in the step 3 is 180-220 ℃, and the screw speed in the extruder is 50-60 rpm.
  8. 8. The method for preparing a thermal insulation wear-resistant non-metal connecting joint according to claim 5, wherein in the step 6, glass fiber or basalt fiber is soaked in vinyl resin, wound on the outer surface of the prepared joint, and then cured for 24 hours at normal temperature to obtain the fiber reinforced layer (2).
  9. 9. The method for preparing the heat-insulating wear-resistant nonmetallic connecting joint according to claim 5, wherein the thermoplastic powder in the step 1 is one or more of PP, PA and PE and is compounded according to any proportion.
  10. 10. The connection method of the heat-insulating wear-resistant nonmetal connecting joint is characterized by comprising the following steps of: S1, firstly, sleeving a non-metal joint on a pipe body of a one-side composite pipe, and then cutting a composite pipe reinforcing layer (7) and a composite pipe outer protective layer (8) at the connecting pipe ends of the two-side composite pipe to leak out of a composite pipe lining layer (6); S2, the inner liners (6) of the composite pipes, which are leaked from the two sides, are bonded into a whole through hot melting butt joint, and the joint is manually polished by sand paper, so that the surface of the inner liner (6) of the composite pipe at the joint is smooth; s3, filling glass fiber materials and bonding resin at the joint of the inner liners (6) of the composite pipes in hot melting butt joint until the glass fiber materials and the bonding resin are flush with the outer protective layer (8) of the composite pipes, and grinding the surface of the outer protective layer (8) of the composite pipes to form taper matched with the inner conical surface (3) of the sleeve; s4, moving the nonmetallic joint to the joint of the composite pipe, enabling the reverse conical structure to correspond to the nonmetallic joint, and then heating the resistance wire (11) through the binding post (4) to realize electric melting heating, so that the joint sleeve (1) is bonded to the outer side of the composite pipe.

Description

Thermal insulation wear-resistant nonmetal connecting joint and preparation and connecting methods thereof Technical Field The invention belongs to the technical field of nonmetal flexible composite pipes, and particularly relates to a heat-insulating wear-resistant nonmetal connecting joint, a preparation method of the connecting joint and a connecting method. Background Compared with the traditional metal pipeline, the nonmetal flexible composite pipeline has the characteristics of light weight, good flexibility, corrosion resistance, small fluid conveying resistance, environmental protection, economy and the like. Meanwhile, due to the flexible design, the construction method can be conveniently adapted to various terrains and complex construction environments, and the installation difficulty and cost are reduced. Nonmetallic flexible composite tubing is becoming an important choice in oilfield gathering and transportation systems by virtue of its unique performance advantages. However, as the development of oil and gas fields proceeds to the middle and late stages, requirements on pipeline performance are gradually increased, and particularly heat preservation and wear resistance become key factors which cannot be ignored. On the one hand, crude oil or other fluid conveyed in the pipeline needs to keep stable temperature to avoid pipeline blockage and corrosion, and on the other hand, various media conveyed in the pipeline can scour and abrade the pipeline to reduce the service life of the pipeline system. The heat preservation and wear resistance treatment of the pipeline connection part is a key link for ensuring the use effect and service life of the whole pipeline system. The connecting method of the nonmetal flexible composite pipeline is mainly two, namely metal buckling connection and nonmetal joint connection. On the one hand, the metal joint connection has the problems of high cost and poor corrosion resistance, and on the other hand, the metal joint mainly adopts an inner/outer coating to carry out heat preservation treatment, but the problem of coating falling off can be generated under the influence factors of long-term medium conveying impact, external environment and the like. These greatly increase the maintenance and repair costs of the oil field and reduce the service life of the pipeline. The non-metal joint is used as one of the non-metal pipeline connection technologies, and has the advantages of corrosion resistance, low cost, large diameter, high automation degree and the like. However, the traditional nonmetallic joint has lower bearing capacity, does not have heat preservation performance, and the used high polymer material has poorer wear resistance, so that the existing pipeline gathering and transportation requirements of the oil field can not be met. Disclosure of Invention The first object of the invention is to provide a heat-insulating wear-resistant non-metal connecting joint, which solves the problem of lower bearing capacity of the non-metal joint in the prior art. The second purpose of the invention is to provide a preparation method of the heat-preservation wear-resistant nonmetal connecting joint, and the prepared nonmetal connecting joint has higher pressure resistance, heat preservation and wear resistance. The third object of the invention is to provide a connection method of a heat-insulating wear-resistant nonmetal connecting joint. The first technical scheme adopted by the invention is that the heat-insulating wear-resistant nonmetal connecting joint comprises a hollow joint sleeve, a fiber reinforcement layer is wrapped on the outer surface of the joint sleeve, a resistance type sensing chip is arranged between the joint sleeve and the fiber reinforcement layer, and the resistance type sensing chip is in wireless connection with a data processing end; The inside winding type of joint sleeve is provided with the resistance wire, and open at joint sleeve and the relative resistance wire both ends of fibre enhancement layer has the conductive hole, wears to have the terminal in the conductive hole, and the terminal is connected with the both ends of resistance wire respectively, and the inner wall of joint sleeve is sleeve internal cone. The first aspect of the present invention is also characterized in that, The taper of the inner conical surface of the sleeve is 0.5-20 degrees. The resistive sensor chip is provided with at least one pair. The fiber reinforcement layer is formed by winding glass fiber or basalt fiber soaked vinyl resin on the outer surface of the joint sleeve. The second technical scheme adopted by the invention is that the preparation method of the heat-preservation wear-resistant nonmetal connecting joint specifically comprises the following steps: step 1, respectively weighing the following raw materials in percentage by mass: 60-70% of thermoplastic plastic powder, 5-10% of masterbatch, 5-10% of polyolefin elastomer and 20% of carbon aerogel