JPS5820681A - Structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] In structures that store a single liquid, various drain tanks and sump are installed to collect the drain generated within the building, but these are limited due to layout restrictions. In many cases, the tank is installed embedded in concrete.During the tank's service, the water is drained regularly and the internal surface of the tank is inspected using an appropriate M1 non-destructive inspection method to check its integrity. I needed to. However, completely emptying the tank is accompanied by various restrictions on plant operation, and depending on the liquid in the tank, there are health problems for workers.

If the liquid stored in the present invention were to leak from the structure into the surrounding environment, there is a possibility that this would develop into a serious social problem, so various measures have been taken to prevent leakage. Regarding the buried tank, it was invented for the purpose of improving the reliability of 19 leakage prevention, and it is very dangerous.

The present invention relates to a structure configured in a welded joint portion for storing a liquid pipe, in which an isolation*1 structure is provided on one side of the structure and watertightly covers the entire area of the welded joint 1 and its vicinity. Concerning structures that are installed across the entire welded joints of the building and are characterized by isolated and connected spaces, embedded tanks for various processing equipment and concrete lined with stainless steel materials. It can be applied to structural materials.

An embodiment of the structure of the present invention will be explained with reference to Fig. 1 and Fig. 2. Fig. 1 is an explanatory diagram of an embodiment of the structure of the present invention in which a temperature controller is attached to 11 of the welding lines. Fig. 2 is an explanatory view of another embodiment of the structure of the present invention in which the steel molding is attached outside the weld line. This shows the stainless steel lining or the tank body, and its shape can be either round or square. 2. The welded joint part is covered over the entire weld line in 1. In the W steel 5. An isolation trench is installed across the entire welded joint part of the structure, which is one side of the structure and covers the vicinity of the welded joint part watertightly, and all isolated #1lrt connections are connected to each other. has been done. The mms frame in Figure 1 is a 0.4ij water level detection register that can be installed either inside the weld line, or outside the weld line in Figure 2, and is connected to the lowest part of the steel mold 5, and the upper part is the water level detector. A detector nozzle 5 is connected. Water level detection #$
9. Connected vertically to 4. The structure allows for filling with gas and installing a pressure gauge. 7rj Water level detection electrode is attached to the water level detection nozzle 5.

The operation of the present invention will be explained. The liquid stored in the tank 1 can be used at the installation welded part of the type steel 5 (Fig. 511), or at the rji
l! If a defect occurs in the weld [2] shown in Figure 2, leakage will occur into the historical steel 3. The leaked liquid passes through the connected mold steel 3 and is collected and stored in the lowest mold steel 3. When the water level of the leaked liquid reaches the water level detection electrode 74C attached to the water level detector nozzle 5, the level detector is activated and an alarm can be sent to notify the operator of an abnormality. When confirming the soundness of the welded part, connect it to the pressurization test nozzle 6'1 and pressurize 5 yen of molded steel to an appropriate pressure with air or other gas. The filled gas pressurizes the entire welded joint from within the steel mold 5 which has been passed slowly i7. If there is a defect in the welded joint @.

Since the pressurized gas leaks out of the molded steel 3 through defects,
The indications of the pressure needles attached to the water level detector nozzle 5i/c will fall one after another, allowing you to know if there is an abnormality.

The above configuration 191 of the present invention provides the following effects.

(2) In stainless steel structures, there is internal residual stress due to welding heat in the welded parts, and the material structure is also sensitized, so there is a risk of stress corrosion cracking being induced in the usage environment.

Cover this entire line with a type VC such as VcL.
It has a double-walled pipe structure, and can ensure substantially the same level of reliability against leakage as a double-walled container.

(2) Even in the unlikely event that a leak occurs, the water level detector can detect the leak at an early stage. If necessary, pressurize with gas from the pressure test nozzle to reduce the pressure drop by 8f.
t-monitor. It is possible to check the presence or absence of C and VCC F leaks. (3) When manufacturing a tank, pressurization tests and bubble tests are carried out to confirm the integrity of welded parts (S gas is pressurized inside Wi steel, and S gas is pressurized on the outer surface. 9) Apply soapy water and check for foaming.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a simple embodiment of the structure of the present invention in which the steel molding is installed inside the weld line, and Fig. 2 is an explanatory diagram of another embodiment of the structure of the present invention in which the steel molding is installed outside the welding line. An explanatory diagram of what is installed is shown. 1... Structure, 2... Welded joint, 3
...Shaped steel, 4...Water level detection □ groove, 5.
...Nozzle holder for water level detector, 6... Nozzle holder for pressure test, 7... Electrode for water level detection. Figure 1 Figure 8) Figure 2

Claims (1)

[Claims] Liquid tube storage #! In a structure configured with a joint W5KL, one side of the structure and the above 1! A structure characterized in that when an isolation groove that watertightly covers the vicinity of the welded joint 1 of the structure is installed, all isolation grooves are communicated with each other.