JPS604840A - Fluid detecting apparatus - Google Patents

Abstract

PURPOSE:To make it possible to easily detect the position of a fluid leak place or a damaged place, by allowing a radio wave to be incident on the interior of an arranged pipe or a tank from an adaptor while detecting the reflected radio wave or the transmitted radio wave by a receiver. CONSTITUTION:In order to accurately detect the leakage of a fluid from an arranged pipe or a tank or the leak position of said fluid without receiving an obstacle such as a heat insulating material or underground concrete, a radio wave 3 is supplied into the arranged pipe 1 through an adaptor 7 equipped with a radio wave oscillator 2 and the leaked radio wave 5, the reflected radio wave 6 and the transmitted radio wave 9 from the damaged place 4 of the arranged pipe 1 are detected by a receiver 8. When the leaked radio wave 5 is issued while affected by an obstacle 10 such as the metal around the arranged pipe 1, the position of the damaged place is calculated and estimated from the intensity distribution of the radio waves detected by a large number of the receivers 8. According to circumstances, one receiver may be provided so as to make the position thereof movable.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for detecting leakage of fluids (including liquids and gases) from piping, tanks, and the like.

Conventionally, the method of detecting fluid leaks is to directly detect the fluid, and the leakage method is to directly detect the fluid. Highly accurate detection of leaks and their locations has the drawback of being difficult to detect because it largely depends on the installation location of the detection device.

In view of the above, the present invention enables accurate detection of fluid leakage from piping and tanks and its location without being hindered by insulation, underground, concrete, etc. covering the piping or tanks. This was done with the purpose of providing a detection device. Hereinafter, the present invention will be explained based on examples.

FIG. 1 is a diagram showing the principle of the fluid detection device of the present invention. In the figure, a radio wave oscillator 2 is provided in a fluid pipe 1, a radio wave 3 is supplied through an adapter 7 to a receiver 1-7, and leakage radio waves 5, reflected waves 6, and transmitted waves 9 from a damaged part 4 of the pipe are received by a receiver. Detected according to 8. Leaked radio waves 5, reflected waves 6, transmitted waves 9,
The position of the damaged part 4 of the pipe is calculated from the spatial distribution and frequency characteristics. An adapter 7 is prepared to transmit radio waves 3 without leaking fluid.

Figures 2 to 6 are schematic configuration diagrams of the embodiment, and Figures 7 to 6 are schematic configuration diagrams of the embodiment.
FIG. 8 is a schematic configuration diagram of the adapter.

The embodiment shown in FIG. 2 will be described. The leakage radio wave 5 of the radio wave 3 supplied from the adapter 7 is directly detected by a receiver 8 to know the position 4 of the damaged part.

The embodiment shown in FIG. 3 will be explained. Figure 3 shows leakage radio waves 5
This is a case where the position is affected by an obstacle 10 such as metal around the pipe, and its position is calculated and estimated from the intensity distribution of radio waves detected by a large number of receivers 8.

The embodiment of FIG. 4 detects a leak by providing a movable position of one receiver instead of the multiple receivers shown in FIG. 3, and calculates and estimates the position. This is what I did.

The embodiment shown in FIG. 5 will be explained. The position of the damaged part 4 is detected using the characteristics of the reflected wave 6.
There are two types of radio waves 3: one that sweeps the frequency and one that uses pulses.

In both cases, the leak position and the size of the damaged area are estimated from the relationship between the reflected waves 6 and the radio waves 3.

The embodiment shown in FIG. 6 will be described. It utilizes transmitted waves 9, and the receiver 8 detects changes in the transmitted waves 9 due to the damaged part 4 of the pipe and measures the position.

In addition, in FIGS. 1 to 6, the oscillator 2 and receiver 8 may be replaced.

Next, the adapter used in the present invention will be explained.

FIG. 7 is a schematic configuration diagram of the adapter, in which 11 is a bar antenna or a loop antenna, 12 is a transparent body 16 for preventing fluid leakage, 13 is a connector adapter, and 14 is a coaxial or waveguide.

FIG. 8 is a schematic diagram of another example of an adapter in which a coaxial waveguide converter 15 is sandwiched between a conductive plate or thin film 16 and a flange 170 to prevent fluid leakage.

As explained above, the present invention is a device that injects radio waves into pipes or tanks and easily detects the location of fluid leakage or damage by the reflected radio waves. It has the advantage of not being affected by wind, etc. at the leak location.
When using transmitted waves or reflected waves, by installing transmitters and receivers at two fixed locations, it is possible to inspect the site directly and monitor it constantly. In the case of simple piping, due to the reflection of radio waves,
Leak positions can be easily and accurately measured.

[Brief explanation of the drawing]

Fig. 1 is a diagram of the principle of the present invention, Fig. 2 is a schematic configuration diagram of an embodiment when there are no obstacles around, Fig. 3 is a schematic diagram of the embodiment when there are obstacles around, and Fig. 4 The figure is a schematic diagram of an embodiment in which the receiver can be moved when there are obstacles in the surroundings, and Figure 5 is a schematic diagram of an embodiment in which damaged parts of pipes are detected using reflected waves within the pipes. , Fig. 6 is a schematic diagram of a case where a damaged part of a pipe is detected by transmitted waves inside the pipe, Fig. 7 is a schematic diagram of an adapter used in the present invention, and Fig. 8 is a schematic diagram of another adapter used in the present invention. FIG. In the figure, 1 is a pipe, 2 is an oscillator, 3 is a radio wave, 4 is a damaged part of the pipe, 5 is a leakage radio wave, 6 is a reflected wave, 7 is an agitator, 8
is a receiver, 9 is a transmitted wave, 10 is an obstacle, 11 is a bar antenna or loop antenna, 12 is a transparent body, 13 is a connector adapter, 14 is a waveguide, 15 is a coaxial waveguide converter, 16 is a The dielectric thin film 17 is a flange. Fang 4 figure 76 figure

Claims (1)

[Claims] A device for detecting leakage and wet locations in fluid piping or tanks, comprising an adapter for injecting radio waves into the piping or tank, and a receiver for detecting transmitted radio waves to the outside of the piping or tank. A fluid detection device comprising: an adapter and a receiver for detecting radio waves reflected inside the pipe.