JPH04105098A - Facility against overflow - Google Patents

Abstract

PURPOSE:To prevent an effect upon important equipment in the same building, upon occurrence of a large amount of water overflow due to a large-scale fracture event at a source of water leakage by providing water leakage detectors in the direction of a certain height in the building, and arranging the detectors at accessible positions. CONSTITUTION:Leakage detectors 1a and 1b are arranged in the vicinity of a pipe line 2, a pump 3 or the like for transferring a large amount of liquid in a building. When water leakage takes plate, leaking water 5 at a fractured section 4 is immediately detected with the detectors 1a on a floor 6. If a large amount of water leaks instantaneously, however, the detectors 1a may be instantaneously immersed in water and the function thereof may be lost. For this reason, the detectors 1b are laid above the detectors 1a for detecting a large amount of water leakage, and such an amount of water leakage is identified and detected with the detectors 1b, according to a vertical level difference. The detector signals are sent to an auxiliary relay panel 8 actuated with the sensing operation of a plurality of or more detectors 1b laid for preventing an erroneous system operation. An alarm signal, then, is sent from the aforesaid panel 8 to a central control panel 9. At the same time, a signal for stopping the pump 3 is automatically sent to a power supply panel 10 for supplying power to the pump 3.

Description

[Detailed Description of the Invention] [Industrial Application Field] This description is directed to pumps for transferring liquids that may cause flooding in buildings containing important equipment and equipment that may lose functionality due to flooding, and Concerning flood countermeasures for buildings where piping systems connected to the water are installed.

[Conventional technology]

Conventional techniques related to flood countermeasures in buildings include drainage equipment in buildings, which will be explained below based on the contents of JP-A-63-284495 and JP-A-59-27292.

As shown in Fig. 3, conventional drainage equipment inside buildings collects leaked liquid generated on each floor using drain funnel equipment 17 installed on each floor of the building, and drain collection pipes 18 are installed on the lowest floor of the building. A system is adopted in which the water is collected in a drain sump pit 19. In addition, with conventional technology, when a flood occurs, it is detected by a detector installed at a certain height from the floor, and the information is displayed to the operation manager, who then manually stops the source of the flood.

[Problem to be solved by the invention]

This method can only be applied to a relatively small amount of water leaking due to cracks in the drain funnel or piping inside the building as shown in Figure 3. As a result, the operation manager cannot determine whether or not it is a large-scale overflow, and the leaked water eventually overflows into the building, affecting important equipment inside the building.

An object of the present invention is to avoid the influence of a large amount of water overflow on important equipment in the same building in the case of a large-scale damage event at a water leak source, as described above.

[Means to solve the problem]

In order to achieve the object of the present invention, detectors for detecting water leakage are provided in the building, distributed in the height direction, and means for displaying the information so that the operation manager can understand it is provided. Furthermore, in order to achieve the object of the present invention, means is provided for automatically stopping the active power supply to the pump or the like that is the source of water leakage based on the detection signal of the detector that detects water leakage.

[Effect]

The water leakage prevention equipment according to the present invention is designed to prevent water leakage when a large amount of liquid overflows in a building due to damage to equipment such as piping and pumps that transport large amounts of liquid. Detect water leaks distributed in the height direction in the equipment room where the piping and pumps mentioned above are installed, where a large amount of liquid may overflow and this overflow may cause water leakage to important equipment. Install multiple detectors. Then, the detection results are displayed to the operation manager. As a result, by installing detectors distributed in the height direction, the operation manager can grasp the extent of water leakage, making it possible to take some measures before important equipment is affected.

In addition, when a water leak is detected, unlike conventional methods, the source of the water leak, such as a pump, is automatically stopped without the intervention of an operation manager, which prevents the water leak from expanding. 1. The object of the present invention can be achieved.

Of course, by combining these two means, it is possible to provide even more reliable flood prevention equipment.

〔Example〕

Hereinafter, one embodiment of this description will be explained with reference to FIGS. 1 and 2.

Figure 1 shows the structure of the flood prevention equipment inside the building. Leak detectors 1a and lb are installed near piping 2, pump 3, etc. that transfer a large amount of liquid in the building. In the event that liquid leaks due to damage to these devices, the overflowing water 5 from the damaged part 4 will be immediately detected by the conventionally installed leak detector 1a on the floor.
Detected at On the other hand, if a large amount of liquid leaks instantaneously, it is expected that the conventionally installed leak detector 1a will instantly leak water and lose its function. For this reason, by installing leak detectors 1b for detecting large amounts of water leakage distributed above the conventionally installed leakage detectors 1a, large amounts of water leakage can be determined from the vertical level difference, and large amounts of leakage can be detected. The signal detected by the leakage detector 1b is sent to the relay panel 7. The signal is further transmitted to an auxiliary relay board 8. In the auxiliary relay board, at least the leak detector 1 is used as a malfunction prevention mechanism.
It is designed to work only when more than one of b is detected, after which an alarm is displayed on the central control panel 9 and a pump stop signal is automatically sent to the power supply panel 10 that supplies power to the transfer pump. Upon receiving the stop signal at the power panel, the power to the transfer pump is switched off. For this purpose, a line is provided to send signals from the auxiliary relay panel 8 to the power supply panel 10. This operation will immediately stop the transfer pump, and by stopping water from overflowing into the building in a short time, it will be possible to minimize water leakage, etc.

A specific example in a building of a nuclear power plant will be described with reference to FIG. Inside the turbine equipment building 11 in this sectional view, a large-capacity transfer pump 3 for transferring cooling water to the turbine equipment is installed. The cooling water is transferred from the main transfer pump through the cooling water piping 2 to the turbine equipment in the building.

On the other hand, in the building configuration as described above, when important equipment 12 of the nuclear power plant equipment is installed in the same building, ・Protect against flooding that may occur in large quantities due to breakage of the transfer pipe, etc. In order to do this, leak detectors 1a and 1b are installed in the room where the transfer piping and pump are installed. - In the event of damage to the piping or pump section, the leak detector 1a will detect it immediately in the same way as the overflow countermeasure equipment configuration shown in Figure 1. In case of occurrence.

A leak detector 1 installed above the leak detector 1a.
b detects. A detection signal from this leakage detector is transmitted through a cable 14 in a trench 13 inside the building, and is sent to a relay electrical panel 7 in an electrical equipment building 15 where electrical equipment is centrally arranged.

Furthermore, after the signal is sent to the auxiliary relay panel 8, an alarm is displayed on the central control panel 9, while a pump stop signal is sent to the power supply panel 10. Immediately after receiving the signal at the power panel, stop power supply to the cooling water pump. After this operation, the pump will stop immediately and the inflow of cooling water into the building will be stopped, making it possible to minimize the amount of water overflowing into the building. In addition, the leak detector 1
By setting the installation height b at a level below which the important equipment will not be flooded, taking into consideration the amount of water that will occur until the pump completely stops after the overflow is detected, a measure can be taken to maintain the functionality of the equipment. According to this embodiment, even if a large amount of water overflows, it can be detected early and the transfer pump can be stopped, thereby minimizing the amount of water overflowing into the building, and important equipment installed. By preventing flooding of nuclear power plants, a flood countermeasure method can be easily obtained without changing the layout and equipment configuration of conventional nuclear power plants.

In addition, the relay panel 7, the auxiliary relay number 8, which is involved in the signal to the electric construction pJ 15 and the power cutoff to the pump 3,
By making the power supply panel 10, the central control panel 9, the cables and leakage detectors related to the functions between these panels stronger than the pumps and piping, even if water overflows from the pumps and piping due to an earthquake, , the pump cutoff function described above can be maintained.

[Detailed description of the invention Since the invention is configured as described above, it produces the effects described below.

■Even in the event of a large amount of liquid overflowing inside a building, multiple leak detectors are installed that are distributed in the height direction.
By displaying the results to the operation manager, it is possible to reliably detect the occurrence of flooding and take immediate action.

(2) Furthermore, pumps and the like that are the source of overflow can be automatically stopped, making it possible to avoid flooding of important equipment.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating the construction of a facility for preventing flooding in a building according to an embodiment of the present invention, and FIG. 2 is a diagram showing an embodiment in which the present description is applied to a nuclear power plant. FIG. 3 is a diagram showing the prior art related to the present invention.

Claims (1)

[Claims] 1. A building having piping for transferring liquid, a drive source for transferring the liquid, and a drive source distributed in the height direction within the building to detect leakage of the liquid into the building. 1. A flood countermeasure equipment comprising: a detection group consisting of a plurality of detectors; and means for displaying the contents of the detector group. 2. A building having piping for transferring liquid, a driving source for transferring the liquid, a water leak detector capable of detecting the height of the liquid leaking into the building, and the result of the water leak detector. Overflow prevention equipment characterized by having a means for displaying. 3. A building having piping for transferring a liquid, a drive source for transferring the liquid, a water leak detector for detecting leakage of the liquid into the building, and a signal from the water leak detector. ,
1. Overflow countermeasure equipment characterized by having a means for stopping a driving source. 4. A building having pipes for transferring the liquid, a driving source for transferring the liquid, a water leak detector capable of detecting the height of the liquid leaking into the building, and a result of the water leak detector. and means for automatically stopping the drive source when the output of the water leakage detector indicates a certain height or more. 5. In claim 1, 2, 3 or 4, the drive source is:
Overflow countermeasure equipment, characterized in that it is installed in the building. 6. Claim 1, 2, 3 or 4, characterized in that the detector, the means for displaying the detection result, and the means for stopping the drive source have stronger earthquake resistance than the piping for moving the liquid and the drive source. Flooding prevention equipment.