KR101057860B1 - Device for measuring amount of stock and leakage in storage tank using magnetostrictive technology - Google Patents

Abstract

PURPOSE: A storage quantity and leakage measurement apparatus for a storage tank by the magnetostrictive technology is provided to prevent an environmental damage resulting in soil contamination by accurately detecting the amount of fluid leaking from a storage tank. CONSTITUTION: A storage quantity and leakage measurement apparatus for a storage tank by the magnetostrictive technology comprises a storage tank, a measuring unit(30), a first float(51), a second float(52), a pulse generating unit(40), and a control unit. The measuring unit detects the level of water and oil stored in the storage tank and the internal temperature of the storage tank. The first and second floats are embedded with magnetic materials(51a,52a) and installed on the exterior of the measuring unit to detect the level of oil and water. The pulse generating unit is inserted and installed inside the measuring unit. The pulse generating unit comprises a brass tube(41), an insulating tube(42) which is overlapped inside the brass tube, and a magnetostrictive wire(43) which is installed to pass through the center of second spacers installed at regular intervals inside the insulating tube. The control unit measures the storage quantity of oil and water and the leakage amount of oil using data provided from the measuring unit.

Description

Device for measuring amount of stock and leakage in storage tank using magnetostrictive technology}

The present invention relates to a storage amount and leakage measuring device of the tank for storing the oil, and more specifically, to measure the storage amount or leakage of the oil stored in the tank by using the magnetostrictive technology (Magnetostrictive technology), which is used when measuring The present invention relates to a storage tank and a leak measuring device of a storage tank using magnetostrictive technology, which is inexpensive to produce, as well as enabling highly accurate measurement by improving the material of the magnetostrictive wire.

The well-known method of detecting the storage amount or leakage of oil stored in the tank using magnetostrictive technology is generated in the magnetic field generated by the magnetic material and the magnetostrictive wire (material) during the measurement of the liquid level. The level of the oil or other stored matter is detected using the pulse signal, and the amount of storage and the oil leakage are calculated based on the level data.

Oil leakage is very important here. Oil leaking from the storage tanks very finely is not detected and is also a major contributor to environmental pollution, which is slowly polluting the surrounding soil.

As described above, the measuring method using the magnetostriction technique is a technique for measuring the minutely varying water level with high precision for a vast amount of contents stored in a large storage tank.

Therefore, the sensitive pulse generated in the magnetostrictive wire has a profound effect on the water level measurement, and thus its component (material) plays a very important role.

At present, most of these magnetostrictive wires are imported from foreign countries and are very expensive. In addition, domestically produced products had a problem that the performance is very poor.

In order to achieve the above object, the present invention measures the amount of storage or leakage of oil stored in a tank by using magnetostrictive technology, and improves the material of the magnetostrictive wire used for the measurement, thereby making very precise measurement. It is possible, of course, to provide a storage tank and leakage measuring device of a storage tank using a magnetostrictive technology which is inexpensive to produce.

In another aspect, the present invention provides a storage tank and leakage measuring device of the storage tank using a magnetostrictive technology that can detect the accurate amount of leakage by improving the material of the magnetostrictive wire, to prevent environmental damage leading to soil pollution.

In order to achieve the above object, the present invention provides a storage tank, a measuring unit for detecting the level of oil and water stored in the storage tank and a temperature inside the storage tank, and installed on an outer circumferential surface of the measuring unit. A first float and a second float in which a magnetic level is detected and a magnetic material is respectively inserted, and inserted into the measuring unit, a brass tube, an insulating tube configured to overlap the inside of the brass tube, and an inside of the insulating tube A pulse generator including a magnetostriction wire installed to penetrate the center of the second spacer at regular intervals, and the oil and water level data received from the measuring unit and temperature data for each level, Storage volume and leakage of storage tanks using magnetostriction techniques, including control means for measuring storage volume, moisture storage volume and oil leakage In the device, the magnetostrictive wire is 54 to 55.5% by weight of iron (Fe), 43.82 to 45.32% by weight of nickel (Ni), 0.25% by weight of chromium (Cr), 0.19% by weight of manganese (Mn), cobalt (Co ) 0.13% by weight, silicon (Si) 0.06% by weight, aluminum (Al) 0.02% by weight, phosphorus (P) 0.014% by weight, carbon (C) 0.011% by weight, sulfur (S) 0.005% by weight It is characterized by.

As described above, the present invention measures the storage amount or leakage of oil stored in the tank by using the magnetostriction technology, and improves the material of the magnetostrictive wire used for the measurement thereof, thereby making it possible to measure very precisely. When leaking, accurate leak volume can be detected, preventing environmental damage leading to soil pollution.

In addition, the magnetostrictive wire according to the present invention is a useful invention that the production unit price is low, bringing the effect of import substitution to help the national interest.

1 is an overall configuration diagram of a storage tank and a leak measuring device of a storage tank using a magnetostriction technology to which the present invention is applied,
2 is an enlarged cross-sectional view of a measuring unit to which the present invention is applied;
3 is a partial perspective view of a measuring unit to which the present invention is applied.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

1 is an overall configuration diagram of a storage tank and a leak measuring device of a storage tank using the magnetostriction technology to which the present invention is applied.

As shown, the storage tank and leakage measuring device of the storage tank using the magnetostriction technology, the storage tank 20 is installed on the ground or underground below the ground surface 10, and the oil (21) stored in the storage tank 20 And a measuring unit 30 for detecting the water level of the water 22 and the temperature inside the storage tank.

In addition, the oil tank 21 is stored in the storage tank 20, and the oil oil 21 may be gasoline, diesel, kerosene, or chemical fluxes. In this case, water 22 may be stored in the storage tank 20. ) Will exist.

The water 22 is a product generated by natural environmental factors in the storage tank 20, and is located on the bottom surface of the tank 20 because the specific gravity is higher than that of the oil 21.

In addition, the measurement unit 30 will be described later, it is configured in the form of a rod, the first float 51 for detecting the water level of the oil 21 on the outer peripheral surface, and the second float 52 for detecting the water level of the water 22 ) Is installed to flow up and down.

In addition, an upper space portion 23 is formed at an upper portion of one side of the storage tank 20, and the upper space portion 23 has a PCB box 25 connected to an upper end of the measurement unit 30 through a spacer 26. Seated inside the vertical conduit 24, the communication data cable 28 drawn from the PCB box 25 passes through the sealing cap 27 of the vertical conduit 24, the ground control through the waterproof pipe 29 It is configured to be connected by means 60.

Here, the configuration of the measuring unit 30 will be described in more detail with reference to FIGS. 2 and 3.

The measuring unit 30 may include a metal tube 31 having a predetermined diameter, a pulse generator 40 mounted in the metal tube 31 through a plurality of first spacers 32, and the metal tube 31. And a sealing boot 33 for sealing the bottom surface.

In addition, the upper end of the metal tube 31 is connected to the PCB 25a inside the PCB box 25 so that the data measuring cable is connected to each other internally.

In addition, a first float 51 and a second float 52 are formed outside the metal pipe 31, and the first float 51 and the second float 52 are each formed of a magnetic material 51a ( 52a) is built-in.

On the other hand, the pulse generator 40 is to be inserted into the interior of the metal tube 31, the brass tube 41, the insulating tube 42 configured to overlap the inside of the brass tube 41, and The magnetostriction wire 43 is installed so as to pass through the center of the second spacer 44 installed at a predetermined interval inside the insulated tube 42, and a plurality of spaces are provided at a predetermined interval outside the brass tube 41 to provide an ambient temperature. And a thermistor 45 for detecting the magnetization wire, a fixing part 46 fixedly installed while fixing the magnetostrictive wire 43 to the bottom surface of the brass tube 41, and the magnetostrictive wire inside the fixing part 46. An elastic portion 43 'is formed in a spring shape so that the 43 has a constant tension.

The storage amount and leakage measuring device of the storage tank using the magnetostriction technology configured as described above, the oil level 21 and the water 22 stored in the storage tank 20, the level of each level (0.1MM), capacity (0.1 liter) ), Temperature (0.01 ° C), density (0.001), leakage (0.1 liters / hour), etc. are measured, calculated and monitored.

In detail, first, the first float 51 detects the water level of the oil 21, and the second float 52 detects the water level of the water 22.

Constant current flows through the magnetostrictive wire 43 so that a constant electromagnetic field is maintained around the magnetostrictive wire 43.

In addition, magnetic bodies 51a and 52a are embedded in the first float 51 and the second float 52, and the magnetostrictive wires on which the first float 51 and the second float 52 are located ( In the portion 43), a pulse deformed by the collision between the magnetic field and the electromagnetic field by the magnetic bodies 51a and 52a is generated, and the pulse spreads at both speeds of sound through the magnetostrictive wire 43 to the PCB 25a. Is sent.

The PCB 25a calculates the distance at which the magnetic bodies 51a and 52a are located by measuring the speed of the detected pulses (including the reflection wave), whereby the water level and the water level 22 of the oil 21 in the storage tank 20 are measured. ) Can be calculated.

In addition, the thermistor 45 installed in a plurality of (eg, five) outside the brass tube 41 of the pulse generator 40 is a sensor for detecting the temperature for each level, the temperature data detected at each level of the PCB Send it to (25a).

On the other hand, the PCB (25a) is a ground signal through the communication data cable 28 by processing the water level data and the temperature data of each level detected by the measuring unit 30 and the pulse generator 40 The control means 60 of the transmission.

The control means 60 calculates the following data based on a program already set by using the oil and water level data and the temperature data for each level transmitted from the PCB 25a.

Using the water level data of the oil 21 and the water 22, the storage amount of the oil and the storage amount of the water are measured.

The temperature correction capacity of oil or moisture is detected using the temperature value detected according to the water level. This is used to detect the exact level because the expansion coefficient is different depending on the type of solution. For reference, the temperature difference occurs in the storage tank depending on the water level (height).

In other words, by detecting the temperature at a plurality of water levels, averaging them, and calculating and correcting the density of oil or water, so as to detect the correct oil and water levels.

Therefore, the control means 60 detects this value and displays the current level and capacity of the oil 21, the level and capacity of the water 22, the amount of oil leakage, the temperature, and the like. When it is alerted.

Therefore, it prevents soil contamination due to oil leakage.

In the storage amount and leakage measuring apparatus of the storage tank using the present invention the magnetostriction having such a configuration and action,

The magnetostrictive wire 43 is a very important component, and since the strain pulse is generated by the first float 51 and the second float 52 which detect the water level of the oil 21 and the moisture 22, The occurrence should be very precise.

Usually, the magnetostrictive wire 43 is known to be made of an alloy containing iron (Fe) and nickel (Ni) as main components.

The present invention is to improve the water level detection accuracy by improving the material of the magnetostrictive wire 43.

The magnetostrictive wire 43 according to the present invention, iron (Fe) 54 ~ 55.5% by weight, nickel (Ni) 43.82 ~ 45.32% by weight, chromium (Cr) 0.25% by weight, manganese (Mn) 0.19% by weight, cobalt (Co) 0.13% by weight, silicon (Si) 0.06% by weight, aluminum (Al) 0.02% by weight, phosphorus (P) 0.014% by weight, carbon (C) 0.011% by weight, sulfur (S) 0.005% by weight Consists of alloys.

Hereinafter, the present invention will be described based on examples.

<Examples>

According to the embodiment of the present invention, the magnetostrictive wire 43,

The magnetostrictive wire 43 is 54.7% by weight of iron (Fe), 44.62% by weight of nickel (Ni), 0.25% by weight of chromium (Cr), 0.19% by weight of manganese (Mn), 0.13% by weight of cobalt (Co), silicon ( Si) 0.06% by weight, aluminum (Al) 0.02% by weight, phosphorus (P) 0.014% by weight, carbon (C) 0.011% by weight and sulfur (S) 0.005% by weight are composed of an alloy.

According to the present invention configured as described above, it is confirmed that the level of oil stored in the storage tank can be accurately sensed, thereby providing an advantage of calculating the leakage amount more accurately.

Experimental Example

According to the above embodiment, the magnetostrictive wire was manufactured and mounted in a storage tank having a diameter of 3.00 m and a length of 7.00 m in which a certain amount of oil was stored. The test as shown in Table 1 below was performed.

This test was conducted by the Korea Testing Laboratory, and the results <Table 1> were evaluated by the Korea Testing Institute.

Number of tests Random Leakage (L / H) Leak detection amount (L / H) of the present invention A company
Leakage Detection (L / H) One 0 0.261 0.817 2 0.863 1.238 1.946 3 0.42 0.374 0.695 4 0 0.64 0.655 5 0.288 0.426 0.505 6 0.26 0.326 0.499 7 0 0.583 0.78 8 0.868 0.829 0.992 9 0.765 0.655 0.844 10 0.2765 0.217 0.246 11 0.514 0.444 0.48 12 0.415 0.356 0.507

As can be seen from the result of <Table 1>, the oil of the storage tank intentionally leaked (random amount of leakage) at 12 times, and the experiment was performed to measure the amount of leakage, prepared according to an embodiment of the present invention. Magnetostrictive wires have been found to detect and measure more accurate leaks closer to the actual leak than A's.

Therefore, in the case of the present invention, it is possible to prevent the phenomenon of soil contamination with accurate leak detection in advance to provide an effect.

In addition, the present invention, the magnetostrictive wire is inexpensive to manufacture, and provides an import substitution effect.

20: storage tank 21: oil
22: Moisture 25: PCB Box
25a: PCB 30: measuring part
31: metal tube 32: first spacer
33: sealing boot 40: pulse generator
41: brass tube 42: insulated tube
43: magnetostrictive wire 44: second spacer
45: thermistor 43`: elastic portion
46: fixing part 51: the first float
52: second float 51a, 52a: magnetic material
60: control means

Claims (1)

A storage tank, a measuring unit for detecting the oil and water levels stored in the storage tank and a temperature inside the storage tank, and an outer circumferential surface of the measuring unit for detecting the oil level and the water level and having a magnetic material embedded therein. A first float and a second float, which are inserted into and mounted inside the measuring unit, include a brass tube, an insulated tube configured to overlap the inside of the brass tube, and an exact center of a second spacer installed at a predetermined interval inside the insulated tube. Measuring the oil storage amount, the water storage amount, and the oil leakage amount by using a pulse generator including a magnetostrictive wire installed to penetrate through the oil and water level data and temperature data for each level transmitted from the measuring unit. In the storage tank and leakage measuring device of the storage tank using a magnetostriction technique comprising a control means,
The magnetostrictive wire, iron (Fe) 54 ~ 55.5% by weight, nickel (Ni) 43.82 ~ 45.32% by weight, chromium (Cr) 0.25% by weight, manganese (Mn) 0.19% by weight, cobalt (Co) 0.13% by weight, Porcelain characterized in that the alloy is a mixture of silicon (Si) 0.06% by weight, aluminum (Al) 0.02% by weight, phosphorus (P) 0.014% by weight, carbon (C) 0.011% by weight, sulfur (S) 0.005% by weight Apparatus for measuring storage and leakage of storage tanks using deformation technology.

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