JP4598997B2 - Reservoir gas phase ventilation system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water tank vapor phase ventilation system, and more particularly, to a water tank vapor phase ventilation system comprising a stainless steel water tank.
[0002]
[Prior art]
Conventionally, a storage tank is an indispensable facility in construction facilities. In this water tank, stainless steel is a material that is less likely to corrode than iron or the like, and is often used for water tanks such as a water tank. However, chlorinated chemicals and the like introduced for the purpose of sterilizing clean water may gasify and stay in the gas phase near the water storage surface, which may corrode the stainless steel in the gas phase.
[0003]
Generally, the water storage tank is provided with a ventilation portion on the ceiling surface. However, since chlorine gas has a higher specific gravity than air, it is difficult for the chlorine gas to be discharged to the outside from the ventilation part provided on the ceiling surface of the water storage tank, and it tends to stay near the water storage surface.
For this reason, conventionally, measures have been taken, such as using a material such as a duplex stainless steel having excellent corrosion resistance against chlorine as the material in the gas phase portion of the water storage tank.
[0004]
[Problems to be solved by the invention]
However, when using materials with excellent corrosion resistance such as duplex stainless steel, there is a problem that the cost is higher than when using general stainless steel such as SUS316 or SUS444. .
[0005]
In addition, when different materials are used for the gas phase part and the liquid phase part in the water tank, if this contact part is always below the lower water level, two types of stainless steel must be present in the liquid phase. As a result, an electrical circuit is formed, and even the duplex stainless steel may be corroded.
[0006]
The present invention has been made in view of the above-described problems, and its purpose is to prevent corrosion even when chemicals that generate corrosive gas are introduced into a stainless steel water tank, and to reduce costs. It is to provide a water tank vapor phase ventilation system.
[0007]
[Means for Solving the Problems]
In order to achieve the above-described object, a water tank vapor phase ventilation system according to claim 1 of the present invention is provided with a first slide pipe that can be vertically expanded and contracted on a ceiling surface of the water tank. An air supply port and a first float member are attached to the lower side, and air is supplied by floating the first float member on the water storage surface in the water storage tank, and at the same time, vertically on the ceiling surface of the stainless steel water storage tank. By attaching an extendable second slide tube, attaching an exhaust port and a second float member to the lower side of the second slide tube, and exhausting the second float member by floating on the water storage surface, the water storage The corrosive gas staying in the gas phase part of the tank is discharged to the outside to prevent the water tank from being corroded by the corrosive gas generated in the gas phase part.
[0011]
According to this water tank vapor phase ventilation system, the exhaust port on the float member floating on the water storage surface moves up and down following the water level change, so corrosive chlorine-based gas that tends to stay on the water storage surface is always outside. It is discharged and corrosion of, for example, stainless steel in the gas phase portion can be prevented.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a water tank vapor phase ventilation system according to the present invention will be described in detail based on the drawings.
[0013]
FIG. 1 is a cross-sectional view showing a water tank vapor phase ventilation system of the present invention, and shows a state in which a water storage surface moves up and down. FIG. 2 is a schematic plan view showing the positions of the air supply port and the exhaust port, as viewed from the direction indicated by the arrow A in FIG.
[0014]
As shown in FIG. 1, in the water tank vapor phase ventilation system 1 of the present embodiment, the water tank 10 is made of stainless steel and is substantially sealed, and is made of lightweight vinyl chloride on one side of the ceiling surface 11 thereof. A first slide tube 12 formed of a pipe or the like is attached with a configuration that can expand and contract in the vertical direction (D direction).
[0015]
An air supply port 13 is provided at the lower end of the first slide tube 12. A first float member 14 is provided on the lower side of the air supply port 13. Furthermore, an outside air inlet 15 is provided on the upper side of the first slide tube 12.
[0016]
A second slide tube 16 similar to the first slide tube 12 described above is attached to the ceiling surface 11 on the opposite side of the air supply port 13 with a structure that can be expanded and contracted in the vertical direction. A mouth 17 is provided. A second float member 18 is provided on the lower side of the exhaust port 17.
Furthermore, a discharge port 19 is provided on the upper side of the second slide tube 16. An exhaust fan 20 is attached in the discharge port 19.
Note that two air supply ports 13 and two exhaust ports 17 are provided, as shown in FIG.
[0017]
Each of the float members 14 and 18 described above floats on the water storage surface 21 in the stainless steel water tank 10, and each slide slides when the water storage surface 21 changes between a high water level (HWL) and a low water level (LWL). The pipes 12 and 16 expand and contract, and the float members 14 and 18 move up and down following the water storage surface 21.
As a result, the air supply port 13 and the exhaust port 17 on each of the float members 14 and 18 move up and down following the change of the water storage surface 21.
[0018]
Thus, in the stainless steel water tank vapor phase ventilation system 1 of the present invention, the exhaust port 17 on the second float member 18 moves up and down following the change of the water storage surface 21, so that it stays on the water storage surface 21. The corrosive gas that is easily generated is effectively discharged to the outside through the exhaust port 17, the second slide tube 16, and the exhaust port 19.
[0019]
Therefore, even when chlorinated chemicals are put into the stainless steel water tank 10 for the purpose of sterilizing clean water, the chlorine gas is always discharged to the outside to prevent the stainless steel water tank 10 from being corroded. it can.
[0020]
Further, since the air supply port 13 also moves up and down in accordance with the change in the water storage surface 21, external air is taken in the vicinity of the water storage surface 21, so that the exhaust effect of the corrosive gas is improved.
Furthermore, since the slide tubes 12 and 16, the float members 14 and 18 and the exhaust fan 20 constituting the air supply / exhaust means can be made of inexpensive commercially available members, the cost can be reduced.
[0021]
The stainless steel water tank vapor phase ventilation system 1 according to the present invention determines the size and number of the air inlets 13 and the exhaust ports 17 and their positions according to the size of the stainless steel water tank 10 and the like. The corrosive gas staying in the vicinity can be appropriately set so that it can be discharged effectively and uniformly.
[0022]
For example, when the stainless steel water tank 10 is installed in a building, the corrosive gas can always be discharged to the outside by extending the discharge port 19 to the outside of the building by piping or the like. Furthermore, this stainless steel water tank vapor phase ventilation system can be applied not only to chlorine gas but also to various gases having a specific gravity heavier than air, and can also be applied to water tanks for chemicals and waste water.
[0023]
【The invention's effect】
As described above, in the water tank vapor phase ventilation system according to claim 1 of the present invention, the first slide pipe that can be vertically expanded and contracted is attached to the ceiling surface of the water tank, and the lower side of the first slide pipe is attached. An air supply port and a first float member are attached, and air is supplied by floating the first float member on the water storage surface in the water storage tank, and at the same time, it can be vertically expanded and contracted on the ceiling surface of the stainless steel water storage tank. A second slide tube is attached, an exhaust port and a second float member are attached to the lower side of the second slide tube, and exhaust is performed by floating the second float member on the water storage surface. Corrosive gas staying in the phase part is discharged to the outside, and corrosion of the water tank due to the corrosive gas generated in the gas phase part is prevented.
[0027]
That is, according to the water tank vapor phase ventilation system of claim 1 of the present invention, the exhaust port on the float member floating on the water storage surface moves up and down following the change in the water level, so that it is easily corroded on the water storage surface. The chlorine-based gas is always discharged to the outside, and corrosion of the stainless steel in the gas phase portion can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a water storage tank in a water tank vapor phase ventilation system according to the present invention.
FIG. 2 is a schematic plan view seen from the direction A in FIG.
[Explanation of symbols]
1 Reservoir gas phase ventilation system
10 Stainless steel water tank
11 Ceiling
12 First slide tube
13 Air inlet
14 First float member
16 Second slide tube
17 Exhaust port
18 Second float member

Claims (1)

Attach the first slide tube (12) that can be expanded and contracted vertically to the ceiling surface (11) of the water storage tank (10),
An air supply port (13) and a first float member (14) are attached to the lower side of the first slide tube,
At the same time as supplying air by floating the first float member on the water storage surface (21) in the water tank,
Attach a second slide pipe (16) that can be vertically expanded and contracted to the ceiling surface of the water tank,
An exhaust port (17) and a second float member (18) are attached to the lower side of the second slide tube,
By exhausting by floating the second float member on the water storage surface, the corrosive gas staying in the gas phase part of the water storage tank is discharged to the outside, and the corrosiveness generated in the gas phase part is generated. A water tank vapor phase ventilation system (1) characterized by preventing corrosion of the water tank by gas.

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