JPH049699A - Structure of drip tray - Google Patents

Abstract

PURPOSE:To surely collect a leaked solution from a tank by a simple structure by arranging a base plate expanded under a tank barrel and guiding the leaked solution leaked from the tank barrel into a skirt to a drip tray by a guide structure. CONSTITUTION:When the solution is leaked from the bottom part of the tank barrel 16, the leaked solution is dropped into the base plate 15 in the skirt 17 and flows into a lower part along the inclined shape of the upper face of the base plate 15. Since a notched hole 18 is formed in the skirt 17 on the lowest position, the leaked solution is allowed to flow into the outside of the skirt 17 through the hole 18, passes on the surface of the base plate 15, flows through the outside of a gap 19 and then drops to a seal welding 20, a template 11 and a drip tray 14.

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to a drip tray structure for collecting liquid leaked from a tank used in a reprocessing facility of a nuclear power plant, etc.
In particular, the present invention relates to a drip tray structure that takes into consideration connection with a skirt-type vertical tank. .

(Prior technology) Conventional tank types had a small capacity, so in order to avoid the complexity of the structure for connecting to the tank, they were either a Japanese leg type or a type that took a seat from the wall. Ta.

Figures 8 and 9 show the drip tray structure of such a Nippo tank.
A rectangular template 2 of a thick plate that is embedded during pouring is placed on top, and a foundation bolt 3 is provided passing through this template 2. 5 Most of it is embedded in concrete]-.Legs 5 are welded to four places on the side of the tank body 4.
The lower ends of these legs 5 are installed on the temple 21 and further fixed to the foundation bolts 3. Foundation bolt 3
Seal welding 6 is applied around the area. A drip tray made of a thin plate is installed on top of the tray 1-1.
Welding 8 is done around the notebook 2 and it is fixed.

(Problem to be solved and attempted by the invention) As mentioned above, the connection between the drip tray and the tank is made using the template 2 embedded during concrete pouring.
Previously, the drip tray 7 was simply welded to the base bolt 3 and the seal weld 6 was applied around the foundation bolt 3. ]・I was able to do it.

However, recently, tanks have become larger in capacity, and we have no choice but to adopt skirt-type vertical tanks due to earthquake-resistant design.3 This brings us to the problem. The question is how to install the drip tray within the skirt.゛, The size of the building is limited to reduce bosses, and there is also no piping from the bottom of the tank, so the skirt height required for human work cannot be secured sufficiently, so there is a risk of dripping inside the skirt. The task of installing the tray may be extremely difficult or even impossible.

One option is to install the drip tray before installing the tank, but in this case, the work of installing the drip tray itself becomes a critical barrier, which lengthens the construction process of the facility and requires the curing of the drip tray itself. become,
This is not a good idea as it increases costs.

The present invention has been made in consideration of the above circumstances, and provides a drip tray structure that allows easy installation of the drip tray without becoming a critical path in the process, and that also minimizes cost increase. The purpose is to

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a structure in which a tank body is supported by a base plate through a skirt, this base plate is welded and fixed to a template placed on concrete, and these base plates and The upper part of the foundation bolt fixing the template to the concrete is covered with a cap, a drip tray is arranged around the template, and a guide structure is provided to guide leaked liquid leaked into the skirt from the tank body to the drip tray. It is something that

(Function) The liquid leaking from the tank is a base play!・Or it falls onto the template and flows along a plane or slope,
It flows through the guide structure to the outside of the skirt and down into the drip tray.

(Embodiments) Hereinafter, embodiments of the drip tray structure according to the present invention will be described with reference to the accompanying drawings.

1 to 3 show a first embodiment of the present invention,
An annular template L/-1-11 is installed at the top of the concrete (concrete) 10 to be embedded during pouring.
A plurality of foundation bolts 1 are installed on the circumference through the hole 11-.
3 will be installed. The lower part of the foundation bolt 13 is embedded in the concrete 10, and the upper part projects above the template 1.

A thin drip tray 1 is provided on the outer periphery of the template 11.
4 is installed, and the edge of this drip tray 14 is welded and fixed to the outer peripheral surface of the template 11. template 1
A disk-shaped base plate 15 whose first surface is inclined is installed on the top of the base plate 1 . On the base plate 15 is a skirt 17 welded to the lower part of the tank body 16.
) The ends are fixed by welding. - of the lower end of the scar 417
A guide structure and a notch hole 18 are formed in the base plates 1 and 15. The base plates 1 and 15 have an inclined shape that becomes lower toward the notch hole. 15. The tank body 16 and the skirt 17 are welded and fixed in advance and installed on the template 11 as one body at the construction site. (Then, they are fixed on the template 11 with the foundation bolts 13.Foundation bolts) The upper end protrusion is covered with a cap 19, and the periphery of this cap 19 is seal welded 20 to the base plate 15. Furthermore, the periphery of the base plate 1-15 is also covered with a cap 19.
Seal welding 20 is applied to the sieve plate 1]-.

Next, the action will be explained.

In the event that there is a leak from the bottom of the tank body 1-6, the leaked liquid will fall onto the base plate 15 in the skirt bow 7 [2, it will flow to a lower force along the sloped shape of dJj on the base plate 15. . Since a notch hole 18 is formed in the skirt 17 at the bottom, the leaking liquid flows through this notch hole 1.
8 to the outside of the skirt 17, then through the base plate 150 and outside the gap 19.
The water flows down to the seal weld 20, the template 11, and the drip tray 14.

In this way, since the base plate 15 has the role of a drip tray, the tank body 16,
By providing the base plate 15 on the skirt 17 and body, a drip tray is formed inside the skirt 17 at the bottom of the tank body 16. 7 Therefore,
At a construction site, the work to form a drip tray around the bottom of the tank is about the installation of the cap 19 and its seal welding 20, and the seal welding 20 of the base plate 15 and template 11, so the time required for this work is limited. A small amount is sufficient. Therefore, it does not become a critical path in the process, and the work is easy. Therefore, the total cost increase can be kept to the minimum necessary.

FIG. 4 shows a second embodiment of the present invention, in which the skirt 1
Instead of forming the notch hole 18 in the base plate 15, a drain hole 22 is formed as a guide structure. The drain hole 22 opens its entrance at the bottom of the base plate 15 inside the skirt 17;
The outlet is opened at the outer periphery of the tube. In FIG. 4, the same parts as in FIG. 1 are designated by the same reference numerals and redundant explanation will be omitted.

In this embodiment, when there is leakage from the bottom of the tank body 16, the leaked liquid falls onto the base plate 15 and then flows downward along the sloped shape of the top surface of the base plate 15. And the drain hole 2 provided at the bottom
Water flows into the drain hole 22 from the input C1T of No. 2, flows to the outside of the skirt 17 through the water drain hole 22, and flows from the outlet opening at the outer periphery of the base plate 1-5 to the seal weld 20 and the template. 11 and flows down into the drip tray 14.

FIG. 5 shows a third embodiment of the present invention, in which the skirt 1
Skirt at the bottom of 7] Connects the inside and outside of 7, skirt 1
A drain pipe 23 is provided to guide leaked liquid in the drip tray 14 to the drip tray 14. The base plate 15A is formed into a disk shape with five horizontal sides. It is also possible to provide the base plate 15 having an inclined plane "-7" so that the bottom of the inclined shape is on the inlet side of the drain pipe 23. The drain pipe 23 extends horizontally so as to connect the inside and outside of the skirt 17, and is further bent toward the drip tray 14 to form an L-shape. In FIG. 5, the same parts as in FIG. 1 are given the same reference numerals, and redundant explanation will be omitted.

In this embodiment, if there is a leak from the bottom of the tank body 16, the leaked liquid will first flow to the base plate 5A.
When it falls on top and accumulates a certain amount, it will naturally turn into a base.
The water flows into the inlet of the drain pipe 23 installed on the streak plate 15A, and is guided by the water drain pipe 23 and flows down to the drip tray 14. 3. FIG. 6 shows a fourth embodiment of the present invention. The base plate/heave i-ff, 5B has an inclined shape such that the center portion is lower. The drain pipe 24 is opened in the center of the base plate 15B. Drain pipe 24
extends downward from the center of the base plate 5B, curves laterally, and extends through the concrete 10;
It penetrates the thin plate of the drip tray 14, and the drip tray 1
1 is opened inside 4 and exits. This drain pipe 24 is installed when concrete 10 is cast, and when the base plate 151 is installed,
,, 5 B and the -1 part of the drain pipe 24 are welded and fixed.

Next, the action will be explained.

In this embodiment, if there is a leak from the bottom of the tank body 16, the leaked liquid will first flow to the base plate L/-)],
, 5 B's top IkoA1・shi, after, base sp[・
-G. ．． 5 Water drains along the slanted shape of the upper 6 sides of B and flows to the center of the tile, with an opening D t,,z in the center.W24
The water flows into the inlet of the drip tray 14 through the drain pipe 24, and exits from the outlet L1 of the drip tray 14.

FIG. 7 shows five embodiments of the present invention.
-+-15C is Tank IIi! 3. Open the bottom of 6 “-”
It is formed into a circular ring shape. First of all, the blur plate is formed in a disc shape that expands to the T part of the tank body 16Q), and its upper surface is formed in an inclined shape that becomes lower toward the center. The drain pipe 24 is this template 1
, The person 1'1 is welded and fixed to the bottom of the central part of A.

In this embodiment, if there is a leak from the bottom of the tank body 16, the leaked liquid will first flow to the tank body 1-1.
After falling on top of A, Denji) Note 11,”,f
- The flow flows into the central part along the sloped shape of the surface, flows into the inlet of the drain pipe 24 which is open in the central part, flows through the drain pipe 24, and flows out of the drain pipe 24. Flows from J into drip tray]4.

The second to fifth embodiments also have the same effects as the first embodiment.

[Effects of the Invention J As explained above, the base plate or template extending under the tank body is provided, and a guide structure is provided to guide leaked liquid leaking from the tank body into the skirt to the drip tray, so the structure is simple. The leakage liquid from the tank can be reliably collected, and the time required for on-site installation work is short, so it does not become a critical path in the process, and the drip tray and related installation work can be done because there is plenty of work space. This has the advantage of being relatively easy to perform and minimizing cost increases.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the drip tray structure according to the present invention, FIG. 2 is a view taken along the n-1 X line in FIG. 1, and FIG. 3 is a view taken in the direction of the FIG. 4 is a vertical sectional view showing a second embodiment of the invention, FIG. 5 is a longitudinal sectional view showing a third embodiment of the invention, and FIG. 6 is a longitudinal sectional view showing a fourth embodiment of the invention. 7 is a vertical cross-sectional view showing the fifth embodiment of the present invention, FIG. 8 is a vertical cross-sectional view showing the conventional drip tray structure, and FIG. 9 is a vertical cross-sectional view showing the conventional drip tray structure. It is a view from the arrow. 10...Concrete, 11...Tembray 1-
11-3...Foundation bolt, 1-4...Drip top 1
/A, 15...Base play h, 16...Tank body, 17...Skirt, 1-8...Notch hole,]]9
... Cap, 20 ... Seal welding 1,

Claims (1)

[Claims] 1. The tank body is supported by a base plate through a skirt, this base plate is welded and fixed to a template placed on concrete, and the upper part of the foundation bolt that fixes the base plate and template to the concrete is capped. A drip tray structure, characterized in that a drip tray is arranged around the template, and a guide structure is provided for guiding leaked liquid leaked from the tank body into the skirt to the drip tray. 2. The drip tray structure according to claim 1, wherein the guide structure comprises a cutout hole formed in the lower part of the skirt. 3. The drip tray structure according to claim 1, wherein the guide structure comprises a guide hole penetrated through the base plate. 4. The drip tray structure according to claim 1, wherein the guide structure comprises a guide tube that communicates between the inside and outside of the skirt. 5. The drip tray structure according to claim 1, 2, 3, or 4, wherein the base plate has an upper surface shape that extends over the entire lower part of the tank body and slopes toward the guide structure. 6. The base plate has an upper surface that extends over the entire lower part of the tank body and becomes lower toward the center, and the guide structure includes a guide pipe that connects from the center of the base plate through the concrete to the drip tray. The drip tray structure according to claim 1, comprising: 7. The template has an upper surface that extends over the entire lower part of the tank body and becomes lower toward the center, and the guide structure includes a guide pipe connected to the drip tray from the center of the template through the concrete. Claim 1 consisting of
Drip tray structure as described.