Lightweight FRP water conveying pipe and processing technology thereof

A processing technology and water pipe technology, which is applied in the direction of general water supply saving, pipes, rigid pipes, etc., can solve the problems of poor synergy, strong vibration of water pipes, and short service life of pipes, so as to reduce damage and enhance bending resistance Rigidity, the effect of enhancing the service life

Pending Publication Date: 2022-08-02
NANJING UNIV OF TECH +1
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AI-Extracted Technical Summary

Problems solved by technology

Filament winding molding process is used to prepare water conveying components. Most of the existing FRP water conveying elbows use the same winding angle, which has poor synergy under hydrodynamic loads; At the same time,...
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Abstract

The invention discloses a lightweight FRP water delivery pipe and a processing technology thereof.The water delivery pipe comprises a water delivery straight pipe and a water delivery bent pipe, the water delivery straight pipe and the water delivery bent pipe are connected through an FRP flange or an FRP hoop, and the water delivery straight pipe and the water delivery bent pipe are both formed by winding resin pre-impregnated fiber reinforced composite material winding wires; a plurality of buffering mechanisms are arranged on the water conveying straight pipe in an array mode and detachably connected to the pipeline. The processing technology comprises the following steps: winding by taking steel as a core mold, and taking out the component core mold after the resin pre-impregnated fiber reinforced composite material is cured and formed; and assembling. The resin pre-impregnated fiber reinforced composite material winding wires are integrally formed for multiple times, the interface performance between winding layers at different angles is greatly improved, the overall synergistic effect of water delivery is improved, and the bending rigidity of the water delivery pipe is remarkably enhanced.

Application Domain

Pipe supportsGeneral water supply conservation +3

Technology Topic

Water deliveryMachining process +4

Image

  • Lightweight FRP water conveying pipe and processing technology thereof
  • Lightweight FRP water conveying pipe and processing technology thereof
  • Lightweight FRP water conveying pipe and processing technology thereof

Examples

  • Experimental program(1)

Example Embodiment

[0025] The present invention will be further explained below in conjunction with the accompanying drawings.
[0026] A lightweight FRP water delivery pipe, the water delivery pipe comprises a water delivery straight pipe 1 and a water delivery elbow 2, and the water delivery straight pipe 1 and the water delivery elbow 2 are connected by a FRP flange 3 or a FRP hoop 4, and the water delivery is straight. The pipe 1 and the water delivery elbow 2 are both wound with resin pre-impregnated fiber reinforced composite materials. The straight water delivery pipe 1 is provided with a plurality of buffer mechanisms 5 in an array, and the plurality of buffer mechanisms 5 can be detachably connected to the pipeline.
[0027] The resin pre-impregnated fiber reinforced composite material is resin pre-impregnated pultruded sheet or resin pre-impregnated fiber yarn, and the resin of the resin pre-impregnated fiber reinforced composite material is unsaturated resin, vinyl resin, epoxy resin or phenolic resin; The impregnated fiber yarn adopts uniaxial, biaxial or multiaxial carbon fiber, glass fiber, basalt fiber, aramid fiber or hybrid fiber.
[0028] Each of the plurality of buffer mechanisms 5 includes an outer ring 51 , a plurality of buffer blocks 52 are arranged in an array on the inner wall of the outer ring 51 , and a spring 53 is arranged in each of the plurality of buffer blocks 52 , and one end of the spring 53 is provided with a slide plate 54 , and the slide plate 54 is slidably connected. Inside the buffer block 52 , one end of the sliding plate 54 is fixedly connected to the buffer rod 55 .
[0029] Preferably, the cross-sectional shape of the connecting block 56 is circular, and is connected with the straight water conveying pipe 1 to increase the contact area with the straight water conveying pipe 1 .
[0030] Preferably, the two sides of the outer wall of the outer ring 51 are symmetrically provided with mounting plates 57, two mounting plates 57 are provided with a plurality of teeth, both sides of the pipeline are provided with fixed plates 58, and the fixed plates 58 are also provided with teeth , the mounting plate 57 and the fixing plate 58 are snap-connected, the mounting plate 57 and the fixing plate 58 are also provided with screw holes, and the mounting plate 57 and the fixing plate 58 are connected by bolts.
[0031] A processing technology for a lightweight FRP water delivery pipe, comprising the following steps:
[0032] 5) Winding with steel as the core mold, the straight water delivery pipe 1 is manually spirally wound with resin pre-impregnated fiber reinforced composite material along the length of the core mold, the winding angle is 15 degrees, the overall number of winding layers is 2, and the bent pipe is along the steel The resin pre-impregnated fiber reinforced composite material is manually spirally wound in the length direction of the mold, the winding angle is 15 degrees, and the number of overall winding layers is 2 layers.
[0033] 6) After the resin pre-impregnated fiber reinforced composite material is cured and formed, the component core mold is taken out;
[0034] 7) Bond the prefabricated resin pre-impregnated fiber reinforced composite material flange, looper flange 3, and straight water delivery pipe 1 and water delivery elbow 2 by hand lay-up process, and assemble the water delivery pipe with bolts; or The prefabricated resin pre-impregnated fiber reinforced composite material hoop 4 is connected with the water delivery straight pipe 1 and the water delivery elbow 2 by bolts;
[0035] 8) The prefabricated buffer mechanism is connected to the straight water delivery pipe 1 by gluing, that is, the connecting block 56 is glued to the straight water delivery pipe 1 .
[0036] The winding mode of the winding surface layer of the water conveying straight pipe 1 in the step 1) can also be spirally wound 4 layers as a whole along the length direction of the core mold, and the winding angle of each layer of the winding surface layer is respectively 75 degrees and 60 degrees from the inside to the outside. 45 degrees and 15 degrees, the water delivery elbow 2 is spirally wound in 4 layers along the direction of the mandrel, and the winding angles of each layer of the winding surface layer are 75 degrees, 60 degrees, 45 and 15 degrees respectively from the inside to the outside.
[0037] Working principle: When installing the water delivery pipe, first fit the mounting plate 57 and the fixing plate 58. At this time, the mounting plate 57 and the fixing plate 58 are engaged with each other. When subjected to vibration, the engaged part can offset the lateral force, and then screw in the bolts. The mounting plate 57 and the fixing plate 58 are fixed. During water delivery, the vibration received by the water delivery pipe is transmitted to the spring 53 through the connecting block 56, and the spring 53 deforms to buffer the vibration and protect the water delivery pipe.
[0038] The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.
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PUM

PropertyMeasurementUnit
Winding angle15.0deg
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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