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Manufacturing technology of frp reinforced prestressed steel cylinder concrete pressure pipe

A technology of prestressed steel and pressure pipes, applied in coatings, anti-corrosion coatings, etc., can solve problems such as interruption or damage of prestressed steel wires, high water absorption rate of cement concrete, and poor protection of steel bars, etc., to achieve small hydraulic flow resistance, The effect of long service life and low construction cost

Active Publication Date: 2020-07-17
义乌市超强管业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The outer protective layer is made vertically by spraying grouting. During the spraying process, the large particles in the cement mortar will easily break or damage the prestressed steel wires, which will cause defects. PCCP mainly relies on the prestressed steel wires to bear the pressure. hidden dangers in the process
[0006] 2. In the process of making the outer protective layer by spraying, it is easy to form uncompacted places, and the protection of the steel bars is not strict, forming cavities or hollows, bumping during transportation and installation, and the hollows are damaged
[0007] 3. Cement concrete has a high water absorption rate and poor impermeability. If the pipeline is buried underground, water will enter the interior of the cement concrete, which will cause corrosion of steel bars for a long time
[0008] 4. The socket is made of steel, and the working surface is exposed outside, which is easy to corrode and cause leakage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]FRP reinforced prestressed steel cylinder concrete pressure pipeline manufacturing process, pouring cement concrete on the inner wall of the steel cylinder with a socket to prepare the pipe core or embedding the steel cylinder in the middle of the concrete to form the pipe core, and then spirally wound on the outer wall of the pipe core The hoop prestressed steel wire is made into a semi-finished PCCP pipe, and the outer surface of the semi-finished PCCP pipe is coated with an interface treatment agent, and then the polymer concrete is wound on the outer wall of the semi-finished PCCP pipe with gauze to form a polymer concrete layer of 6-10mm. The purpose is to compact and fill the gap between the prestressed steel wire and the prestressed steel wire, wind a layer of glass fiber on the outer surface of the polymer concrete layer to make a 2-5mm thick glass fiber reinforced layer, and finally wrap the outer surface of the glass fiber reinforced layer The resin-rich layer o...

Embodiment 2

[0064] 1. Preparation of interface treatment agent:

[0065] By weight percentage, get vinyl resin 70.2%, flexible resin 5%, styrene 4%, defoamer 1%, silane coupling agent 2%, fumed silica 3%, 200 mesh aluminum hydroxide 6%, 70-100 mesh aluminum hydroxide 8%, accelerant (1% cobalt liquid) 0.8%, spare.

[0066] To operate in an environment with a temperature of 23-30°C, add methyl ethyl ketone peroxide (1.5% by weight of the interface treatment agent) to the raw material of the interface treatment agent, stir evenly, and then evenly roll-coat it on the surface of the steel cylinder to form an interface treatment layer.

[0067] Vinyl resin has always had the problem of insufficient bonding strength with concrete. At present, most solutions are to modify vinyl resin and supplement it with adhesives. This method requires pretreatment or reprocessing of vinyl resin. Processing increases the complexity of operation, increases the difficulty of construction, and makes it inconvenie...

Embodiment 3

[0087] The difference from Example 2 is:

[0088] 1. Preparation of interface treatment agent:

[0089] By weight percentage, get vinyl resin 74.7%, flexible resin 4.5%, styrene 3.5%, defoamer 0.8%, silane coupling agent 1.5%, fumed silica 2.5%, 200 mesh aluminum hydroxide 4.5%, 7.5% aluminum hydroxide of 70-100 mesh, 0.5% accelerator (1% cobalt solution), set aside.

[0090] 2. Preparation of polymer concrete:

[0091] Weigh the aggregate according to the following weight percentage: 53% of 10-30 mesh quartz sand, 23% of 30-70 mesh quartz sand, 16% of 70-100 mesh quartz sand, 8% of 200-300 mesh quartz sand; by weight percentage Weigh auxiliary materials: 85% unsaturated resin, 4% styrene, 8.8% flexible resin, 0.1% defoamer, 1.6% silane coupling agent, 0.5% accelerator, and set aside.

[0092] 3. Configuration of rich resin agent

[0093] By weight percentage, take vinyl resin 90%, thixotropic agent (fumed silica) 2%, propylene glycol 0.3%, ultraviolet absorber 1%, defoame...

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Abstract

The invention provides a manufacturing technology of an FRP (Fiber Reinforce Plastic) enhanced prestressed cylinder concrete pressure pipeline and belongs to the technical field of pipeline manufacturing. Cement concrete is poured into a steel cylinder inner wall with a socket opening to be prepared in a pipe core, or a steel cylinder is buried into the concrete to prepare the pipe core; then an annular prestressed steel wire is wound on an outer wall of the pipe core to prepare a PCCP (Prestressed Concrete Cylinder Pipe) semi-finished product; then the outer surface of the PCCP semi-finishedproduct is coated with an interface treatment agent; then polymer concrete is wound on the outer wall of the PCCP semi-finished product by adopting bag gauze to form a polymer concrete layer; one layer of glass fibers are wound on the outer surface of the polymer concrete layer to prepare a glass fiber enhanced layer; finally a surface resin-enriching layer is manufactured on the outer surface ofthe glass fiber enhanced layer to manufacture the FRP enhanced prestressed cylinder concrete pressure pipeline. The manufacturing technology provided by the invention is simple; the manufactured FRP enhanced prestressed cylinder concrete pressure pipeline has excellent performance on all aspects and has the advantages of high sealing property, high strength, high anti-permeability, corrosion resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of pipeline production, and relates to prestressed concrete pipelines, in particular to a fabrication process of FRP reinforced prestressed steel cylinder concrete pressure pipelines. The manufacturing process of the invention is simple, and the manufactured FRP reinforced prestressed steel cylinder concrete pressure pipe 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] In the 1940s, Europe and the United States competed to start development, among which the United States is the country that produces and uses the most prestressed steel cylinder concrete pipes. So far, the United States has used prestressed steel cylinder concrete pipes for 28,000km, with a maximum diameter of 7600mm. More than 90% of urban water supply projects use prestressed steel cylinder concre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/02C04B41/48C09D201/00C09D5/08C09D7/61
CPCC04B26/02C04B41/009C04B41/4857C08K2003/2227C08K2201/014C08L2203/18C09D5/08C09D201/00C04B24/00C04B24/24C04B2103/50C04B24/42C04B2103/0068C04B14/06C04B20/0076C08L101/00C08K3/36C08K3/22
Inventor 温振刚高晨晓吴青玉
Owner 义乌市超强管业有限公司
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