CN104934077A - Component for transferring or receiving fluid and method for testing component - Google Patents

Abstract

The invention relates to a component for transferring or receiving a fluid and a method for testing the component. The component (20a-e) for transferring or receiving the fluid is a component (20a-e) particularly for a fluid transfer pipeline system (20) of industrial facilities and a three-stage cooling circuit pipeline system of a nuclear power station, and the wall of the component comprises a glass fiber reinforced support structure (2). The component is provided with an electrically insulated inner protective layer and an electrically insulated outer protective layer (4 and 6) on the surface of an inner component and the outer surface of an outer component respectively. A conducting inner middle layer (10) is positioned between the inner protective layer (4) and the support structure (2), the layer is provided with an electric terminal (8), a conducting outer middle layer (14) is positioned between the outer protective layer (6) and the support structure (2), and the layer is provided with an electric terminal (12) and is electrically insulated from the inner middle layer (10).

Description

For transmitting or receive the parts of fluid and the method for test component

The present invention relates to the parts for transmitting or receive fluid, particularly industrial plant fluid transfer conduit system, the parts of the particularly piping system of three grades of cooling circuits of nuclear power station.In addition, the present invention relates to the method for testing this parts.

The steel conduit that in industrial plant, the parts of the fluid transfer conduit system (cooling ducts in three grades of cooling circuits of such as nuclear power station) of (in such as chemical industry factory or in generating plant) usually coat rubber by underground, inside and outside or concrete pipe are formed.But the pipe of two types is due to corrosion or corrode through frayed, and usually must be replaced in older nuclear power station.Particularly when the nuclear power station by cooled with seawater, as long as rubberised layer is attacked or damaged, the corrosion of steel conduit just presents serious problems.Due to this reason; the parts of these piping systems be made up of steel or concrete by parts-by glass fiber reinforcement plastics (such as; the compound substance be made up of glass fibre and epoxy resin (EP)) the load-carrying members element that constructs replaces, and all parts is provided with protective seam or enhancement layer therein with on its outside in addition.But the shortcoming of the parts of this type is its limited testability, because usual acceptable method (such as, eddy-current test) not may be utilized, because these methods take conductive material as condition precedent.Although supersonic ultrasonic testing method is possibility fundamentally, but is not suitable for actual use due to the compound structure of complexity.Therefore, at present, parts that are that constructed by composite glass fiber/plastic material and that can be not only piping system and be that the test of this parts of the container that can be filled with fluid is carried out by means of only visual inspection, because executor is inserted in parts to be tested and the inside surface of the latter uses video camera to check.But visual inspection is difficult, because the parts emptied are usually wet and sometimes there is sediment, mud and biological membrane on inwall.On inside pipe wall, only therefore significant change can establish by means of visual inspection.

The object that the present invention is based on is the parts illustrated for transmitting or receive fluid, and described parts construct based on the plastics of glass fiber reinforcement, and can test the existence of damage in a straightforward manner.In addition, the object that the present invention is based on is the method for the parts illustrated for testing this type.

About parts, object according to the present invention realizes by means of the feature of Patent right requirement 1.According to these features; the wall of parts comprise be made up of the plastics of glass fiber reinforcement and within it surface and outside surface on be respectively arranged with the internal protection layer of electrical isolation and the bearing structure of exterior cover sheets; the bosom layer being provided with the conduction of electric terminal is arranged between internal protection layer and bearing structure, and be provided with electric terminal and and the outside middle layer of the conduction of bosom layer electrical isolation be arranged between exterior cover sheets and bearing structure.

In this context, the pipeline of fluid transfer conduit system and parts and the fixing of fluid (namely receiving fluid) can be filled with and transportable container should be understood to the parts in meaning of the present invention.

Measure by means of these, if the fluid being arranged in parts conducts electricity in essence or become conduction in Measuring Time by adding suitable chemical substance, then the leakage of bearing structure can be detected by the resistance measured between bosom layer and outside middle layer in a straightforward manner.

Owing to as a rule being carried out the production of bearing structure to the method being called as winding method rotated on steel core by cross traverse winding with the fibre glass roving of wherein resin-dipping, if middle layer or multiple middle layer are formed by conductive fabric, then the production of parts is simplified, because this can be employed with the winding identical with bearing structure or application technology.

About method, object according to the present invention realizes by means of the feature of Patent right requirement 3, detects the resistance between outside middle layer and bosom layer according to described method.Therefore, if fluid is conduction, then the defect in bearing structure detects by carrying out simple electrical continuity test (that is, by measuring the resistance between outside middle layer and bosom layer).

In order to explain the present invention further, illustrated exemplary in reference diagram, in the drawings:

Fig. 1 shows according to the wall of parts of the present invention with the details of xsect,

Fig. 2 shows the parent map by the monitoring device of the piping system of multiple assembling parts to be monitored.

According to Fig. 1, the wall of the parts of fluid transfer conduit system is constructed by the bearing structure 2 serving as bearing partition part.Bearing structure 2 is nonconducting and is made up of the compound substance of glass fiber reinforcement.Wall surface and outside surface is respectively arranged with internal protection layer 4 and the exterior cover sheets 6 of electrical isolation within it.Be provided with the bosom layer 10 of the conduction of electric terminal 8 between internal protection layer 4 and bearing structure 2; and similarly, be provided with electric terminal 12 and by the outside middle layer 14 of the conduction of bearing structure 2 and bosom layer 10 electrical isolation between exterior cover sheets 6 and bearing structure 2.In other words: bearing structure 2 is provided with internal protection layer 4 within it on the surface and is applied to the bosom layer 10 of its conduction and is provided with the outside middle layer 14 that exterior cover sheets 6 is applied to its conduction on its outer surface.Internal protection layer 4 and exterior cover sheets 6 respectively guard block from from inner and from the damage of outside.Wherein the abrasive grain conduit component that such as husky cooled agent is carried secretly is usually provided with the internal protection layer 4 be made up of the rubber that about 2mm is thick.

The electric terminal 8 in inner conductive middle layer 10 and the electric terminal 12 in external conductive middle layer 14 can be close from outside, such as, be arranged on the outside of exterior cover sheets 6.

Conductive intermediate layer 10 and 14 is by net (netting) or fabric manufacture, and net or fabric such as, fine silver net, high grade steel fabric, have and weave into glass fiber mesh wiry or glass fabric or carbon fibre composite.

So by means of measurement mechanism 16, the resistance R between bosom layer 10 and outside middle layer 14 can be monitored.If bearing structure 2 and internal protection layer 4 leak, then the fluid permeability being arranged in components interior is to bearing structure 2 and force its path through bearing structure 2, until outside middle layer 14.If the fluid (being usually water) being positioned at components interior is conduction, then the electrical insulation characteristics of bearing structure 2 is correspondingly impaired, and the Ohmage R between bosom layer 10 and outside middle layer 14 reduces.Nonconducting fluid can become conduction by admixing adjuvant during measuring.For leak generation parts simple and reliable monitoring from but possible.

According to Fig. 2, in order to monitor constructed by multiple parts 20a-e and so in figure by being connected to the illustrated piping system 20 of line segments each other via flange 22, arrange center monitors device 30, the Ohmage between the conductive intermediate layer of wherein all parts 20a-e is detected.Therefore, not only can the parts that are affected of the generation of the leakage of testing pipes system but also identifiable design automatically.

Claims (3)

1. one kind for transmitting or receive the parts (20a-e) of fluid, the particularly fluid transfer conduit system (26) of industrial plant, the particularly parts (20a-e) of the piping system of three grades of cooling circuits of nuclear power station, the wall of described parts comprises the bearing structure (2) be made up of the plastics of glass fiber reinforcement, and surface and outside surface are respectively arranged with internal protection layer and the exterior cover sheets (4 and 6) of electrical isolation within it, the bosom layer (10) being provided with the conduction of electric terminal (8) is arranged between described internal protection layer (4) and described bearing structure (2), and be provided with electric terminal (12) and and the outside middle layer (14) of the conduction of described bosom layer (10) electrical isolation be arranged between described exterior cover sheets (6) and described bearing structure (2).

2. parts as claimed in claim 1, wherein said middle layer (10,14) are formed by conductive fabric.

3. a method for the parts of test as described in aforementioned claim, the resistance (R) between wherein said outside middle layer and described bosom layer (10,14) is detected.