JPS59154334A - Detector for leakage of piping - Google Patents

Abstract

PURPOSE:To detect a leakage when a pipeline is damaged and prevent effectively radioactivity from being flowed out much and dispersed to the external, by providing a leakage dispersion preventing vessel on the outside of the piping and setting an electrode in the piping. CONSTITUTION:Pipings 1 and 2 are connected by a joint flange 3, and a half cylindrical cover 4 is provided for the purpose of preventing water leaked from the joint part from being flowed out to the floor surface. An insulating layer 6 of a liquid having a low degree of acid or alkali tolerance is provided on the inside of the cylindrical cover 4 so as to be brought closely to a side plate 5 of an electrode band cover for the purpose of detecting the leakage from the joint part. If leaked water is picked out from near the joint flange because of a damage or the like, the liquid is stored on an electrode rod, and an electric circuit is formed to flow a current. This current value is sensed to detect the leakage, and radioactivity is prevented effectively from being flowed out much and dispersed to the external.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to transportation piping, and in particular to piping and joints through which corrosive liquids other than neutral, such as concentrated waste liquid from plants, and liquids containing highly radioactive gold flow. related to leak detection.

[Prior art]

In conventional plants, etc., leakage of highly acidic, highly alkaline, and highly corrosive liquids, such as plant waste liquids, can cause accidents.V. Is there no way to do this and a large amount of leakage causes a p accident? There was a problem in that the detection device would make malfunctioning noises due to water droplets, water droplets, etc.

[Purpose of the invention]

An object of the present invention is to provide a detection device that instantly and accurately notifies the user of the presence or absence of a leak and prevents malfunctions when a pipe through which a non-neutral liquid flows is damaged and the liquid leaks.

[Embodiments of the invention]

The present invention will be explained below with reference to FIG. 1, which is an example of a piping flange.

The pipes 1 and 2 are connected by a joint 7 and a flange 3, and a 40% cylindrical cover is provided to prevent water leaking from the joint from flowing out onto the floor. In order to detect all leakage from the joint, the cylindrical cover is provided with an insulating layer 6 on the inside that is in close contact with the side plate of the battery cover 5 and is weak against acid or alkaline liquids. In the 1[, f1M band, seed rods 7 as shown in FIG. 2 are arranged in parallel and a voltage is applied. If there is no leakage, no current will flow between the electrodes.

When leakage water is extracted from the vicinity of the joint flange due to damage, etc., the liquid collects in the electrode rod, an electric circuit is formed, and current flows. By sensing all of this current value, it is possible to quickly confirm the presence or absence of leakage and the location of the leakage. In addition, if there is an oily surface that is susceptible to operation due to dew condensation, etc., the electrode rod is covered with an insulating layer made of a material that is susceptible to acidic or alkaline liquids flowing inside the pipe.

Table 1 As an example, Table 1 shows the type of liquid (pH concentration) and the type of insulating material. Furthermore, by coating all of these resins separately, it becomes possible to detect both acidic and alkaline liquids.

When pressure is applied to the liquid in the piping, by connecting the half-split cylindrical cover, electrode strips, and insulating strips all over the top and bottom, it becomes possible to detect flying leakage water. By providing a similar detection mechanism for the straight pipe section, it becomes possible to detect leaks due to damage to the pipe section. Furthermore, by separating the leakage detection cover metal between the piping section and the flange section and making it removable, maintenance becomes easier.

〔Effect of the invention〕

According to the present invention, highly radioactive waste such as concentrated waste liquid in nuclear power generation facilities is destroyed, and leakage can be detected when piping through which highly corrosive liquid flows is damaged for some reason. It is highly effective in preventing large amounts of radioactivity from leaking out and dispersing it to the outside, as leakage points in piping can be instantly confirmed. In addition, since it is only necessary to install a cylindrical cover metal with an electrode band and an insulating layer fully adhered to the outside of the existing piping, it can be easily carried out during regular inspections, etc.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a leakage mechanism shown in this embodiment at a pipe joint, and FIG. 2 is a schematic view of an electrode band that is in close contact with a half-split cylindrical cover.

Claims (1)

[Claims] 1. When detecting leaks by installing a leak diffusion prevention container with gold film on the outside of the pipe and all electrodes in one ivy part, there is no corrosion or A piping leak detection mechanism featuring a leak detection electrode made of easily damaged insulating material. 2. The piping leak detection according to claim 1, characterized in that the insulating material is acrylic resin gold for acidic liquids, and phenolic resin full coachia f-f for alkaline liquids. mechanism.