Forming Technology of Polymer Reinforced Prestressed Steel Cylindrical Concrete Pipe

A prestressed steel, forming technology, applied in applications, tubular items, other household appliances, etc., can solve problems such as electrochemical corrosion, corrosion failure of steel wires and steel cylinders, perforation leakage, etc., to reduce the formation of micro-cracks, prevent The effect of micro-crack initiation and enhancement of mixing uniformity

Active Publication Date: 2020-09-04
江苏致乐管业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Concrete member products in the soil environment, if the prestressed steel cylinder concrete pipe does not take effective protection measures, as the service time prolongs, the aggressive medium in the soil environment of the outer wall of the prestressed steel cylinder concrete pipe and the water medium in the pipe will invade If the mortar protection layer and concrete layer in the prestressed steel cylinder concrete pipe reach the surface of the steel wire and steel cylinder, the steel wire and steel cylinder will undergo electrochemical corrosion, which will lead to corrosion failure of the steel wire and steel cylinder, perforation leakage or even explosion. The pipe phenomenon will cause hidden dangers to the safe operation of the pipeline system and directly threaten the operation reliability of the pipeline system. The corrosion of the prestressed steel wire and the steel cylinder is the main factor affecting the durability of the structure. If the steel wire and the steel cylinder are damaged due to corrosion Damage will directly lead to corrosion damage of the prestressed steel cylinder concrete pipe, thus affecting the safe operation of the entire pipeline system
[0005] The steel cylinder steel wire, the main component inside the existing prestressed steel cylinder concrete pipe, is prone to breakpoints, resulting in a decrease in the performance of the steel wire, which cannot effectively protect the steel cylinder, resulting in performance defects such as compression resistance and tensile resistance, and will also affect the outer layer of mortar. The anti-seepage and anti-crack effect of the protective layer brings hidden dangers to the safe operation of the pipeline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1), the preparation of lining mould: on the concrete pipe core that has steel tube, wind the hoop prestressed steel wire, prepare into PCCP pipe semi-finished product, this PCCP pipe semi-finished product is directly used as lining mould, prefabricated in described concrete pipe core There is a reinforced net; the setting of the reinforced net is to improve the mechanical properties of the pipeline such as compression resistance and tensile strength, prevent cracks, and reduce the burden on the steel cylinder in the pipeline;

[0035] (2), external mold pretreatment: coat a layer of release agent on the inner wall of the external mold;

[0036](3) Construction of the pouring structure: from the inside to the outside, the lining mold, the reinforcement net, and the outer mold are sequentially composed of the pouring structure, and polymer concrete is poured into the pouring structure, and the outer mold is removed after molding to obtain polymer reinforced prestressed st...

Embodiment 2

[0052] The difference from Example 1 is:

[0053] The polymer concrete includes 92% of aggregates, 8% of resin binders and auxiliary agents in total by mass percentage, and the aggregates include 1- 3 mesh quartz sand, 5-9 mesh quartz sand, 20-30 mesh quartz sand, 40-60 mesh quartz sand, 80-100 mesh quartz sand, 140-200 mesh quartz sand.

[0054] In terms of mass percentage, the auxiliary agent includes a curing agent accounting for 1.8% of the mass of the resin adhesive, an accelerator accounting for 0.4% of the mass of the resin adhesive, a coupling agent accounting for 2% of the mass of the resin adhesive, and an accounting for 2% of the mass of the resin adhesive. 0.03% of the polymerization inhibitor by mass of the mixture, and 5% of the flame retardant by the mass of the resin binder.

[0055] During the preparation of polymer concrete, the gelation time of step D is 3 minutes. When gelling, the ambient temperature is controlled at 20°C-21°C, and the humidity is 51%-53%...

Embodiment 3

[0057] The difference from Example 1 is:

[0058] The polymer concrete includes 93% of aggregates, 7% of resin binders and auxiliary agents in total by mass percentage, and the aggregates include 2- 3 mesh quartz sand, 6-8 mesh quartz sand, 15-25 mesh quartz sand, 35-55 mesh quartz sand, 90-110 mesh quartz sand, 150-180 mesh quartz sand.

[0059] In terms of mass percentage, the auxiliary agent includes a curing agent accounting for 1.4% of the mass of the resin adhesive, an accelerator accounting for 0.3% of the mass of the resin adhesive, a coupling agent accounting for 1.5% of the mass of the resin adhesive, and accounting for 1.5% of the mass of the resin adhesive. Mixture quality 0.025% polymerization inhibitor, accounting for 6% flame retardant resin binder quality.

[0060] During the preparation of the polymer concrete, the gelation time of step D is 4 minutes. During the gelation, the controlled environment temperature is 20° C.-22° C., and the humidity is 52%-54%. ...

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Abstract

The invention provides a polymer-reinforced prestressed concrete cylinder pipe molding technology, and belongs to the technical field of pipeline manufacturing. The polymer-reinforced prestressed concrete cylinder pipe molding technology comprises the following steps that (1) manufacturing of a lining mold is conducted, wherein circumferential prestressed wires are wound around a concrete pipe core with a steel cylinder, a PCCP semi-finished product is formed and directly serves as the lining mold, and a reinforcing net is prefabricated in the concrete pipe core; (2) pretreatment of an outer mold is conducted, wherein a release agent coats the inner wall of the outer mold; and (3) construction of a pouring structure is conducted, wherein the lining mold, the reinforcing net and the outer mold are combined in sequence from inside to outside so as to form the pouring structure, polymer concrete is poured into the pouring structure, the outer mold is removed after molding is accomplished,and therefore a polymer-reinforced prestressed concrete cylinder pipeline is obtained. The polymer-reinforced prestressed concrete cylinder pipe molding technology is simple, and the manufactured polymer-reinforced prestressed concrete cylinder pipeline is excellent in performance and has the advantages of being high in sealing performance, strength and anti-permeability and resistant to corrosion.

Description

technical field [0001] The invention belongs to the technical field of pipeline production, and relates to a prestressed concrete pipeline, in particular to a polymer reinforced prestressed steel cylinder concrete pipeline forming process. The molding process of the invention is simple, and the prepared polymer-reinforced prestressed steel cylinder concrete pipeline has excellent performance in all aspects, and has the advantages of high sealing performance, high strength, high impermeability, corrosion resistance and the like. Background technique [0002] Prestressed steel cylinder concrete pipe, referred to as PCCP pipe, refers to a water delivery pipe made by winding a hoop prestressed steel wire on a high-strength concrete core with a steel cylinder, and then spraying a dense cement mortar protective layer on it. PCCP pipe is a new type of composite pipe composed of four basic materials: steel plate, prestressed steel wire, concrete and cement mortar, after steel cylind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C39/10B29C39/26B29C33/38C04B26/02B29K503/08B29L23/00
Inventor 温振刚李先众谢云龙
Owner 江苏致乐管业科技有限公司
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