JPS61172026A - Apparatus for detecting leaked water - Google Patents

Abstract

PURPOSE:To obtain the title detection apparatus generating no erroneous operation by attaining to enhance the reliability of a detector, by setting a detection cable to an under-floor embedding system and receiving the same in a protective cover. CONSTITUTION:A water gathering trough 16 is constituted around installed machinery 2 and a part of said trough 16 is connected to a drain pipe 17 to make it possible to discharge inflow water out of the system. One end of a detector holder 19 is fixed to a protective cover 18 and the other end thereof is fixed to a leaked water detector 11 and a detector 11 is held so as not only to set height thereof to a dimension (h) spaced apart from the bottom surface of the water gathering groove 16 but also to be provided at the almost central position of the cover 18 without being offset to the left and right. A plurality of water inflow ports 20 are provided to both side surfaces of the cover 18 and the height thereof is set so as to be made slightly larger than the height (h). Therefore, when a small amount of water is temporarily flowed in the water gathering trough 16, said water is diffused i the water gathering trough 16 and prevented from rising up to the height (h) and inflow water flows along the surface of the cover 18 and, therefore, said water is prevented form th contact with the detector 11 and erroneous operation can be prevented. The detector 11 is received no mechanical damage and the adhesion of dust thereto is also reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a leakage water detection device for water-cooled equipment installed indoors.

[Background of the invention]

Detectors are installed on the floor around equipment in order to detect water leaking from equipment as early as possible, stop the supply of cooling water, and minimize water damage. As a result, disadvantages such as mechanical damage due to movement of equipment or walking by people, malfunction due to moisture in floor cleaners, water-based wax, etc., and fluctuations in operating sensitivity due to adhesion of dust were common.

FIG. S shows a configuration diagram of a conventionally used cooling water supply device and leakage water detection system. 1 is an equipment installation room, and 2 is equipment that requires water cooling and is installed in the equipment installation room 1, and has a cooling pipe line 3 inside.

4 is a water pipe connection port, and 5 is a water pipe for supplying and draining cooling water. 6 is a manual stop valve, which is used to temporarily stop the cooling water during maintenance and inspection. 7 is a cooling water cutoff valve that opens and closes the cooling water line in response to an external operation command. A cooling water device 8 supplies cooling water at a constant temperature to the equipment 2. Therefore, a heat exchanger 9 and a water pump 10 are included. (Detailed explanation of the cooling water system 8 is omitted), 11 is a water leak detector which generally includes equipment 2, water pipe 5, manual stop valve 6, (area where water is drawn into the equipment installation room 1 and is likely to cause leakage) ) is placed on the floor surface 1a of the equipment installation room 1 so as to surround the periphery of the device. No. 11 measures the resistance between two electrodes in principle; it uses an electrode type in which two metal rods are placed facing each other at a certain distance, and a method in which two electrode wires are connected through a porous insulator. Two types of cable type, which are formed into a twisted cable shape, are in practical use, but in the case of the electrode type shown in Figure 5, the number of units installed increases, the cost and installation man-hours increase, and space is also a problem. Because of this, recently cable-type devices have come into widespread use. The present proposal will also be explained below, focusing on the cable type. 12 is a detection amplifier inside the equipment installation room 1 that receives the water leakage signal detected by the water leakage detector 11 and sends a stone activation command f to the cooling water cutoff valve 7 via a signal cable 13 to the outside. If water leaks from the cooling water line, it falls onto 11a and collects, and after a certain period of time, it spreads to the water leak detector 11 where it is detected as leaking water.

At this time, the cooling water cutoff valve 7 is closed by a command from the detection amplifier 12, and the supply of cooling water to the d-device 2 is stopped. FIG. 6 is a side view of FIG. 5. Figure 7 shows water leak detector 1
1 shows the floor fixed row. The water leakage detector 11 is held in close contact with the floor surface 1a by a presser metal fitting 13 which also serves as a protective cover, and the signal cable 13 is fixed to the floor surface by a fixing screw 13a. Figure 8 also shows an example of fixing to the floor, where 14 is a holding metal fitting, and the water leakage detector 1 is mouth-shaped and has water inlets 15 (notches) on both sides.
1 is stored in the inner surface of the presser metal fitting 14, and its lower end is on the floor surface 1a.
Closely attached to. This structure causes unevenness on the floor surface, making it inconvenient to move the equipment. 1. Malfunctions may occur due to moisture on the floor other than leaked water such as the cleaning water mentioned above, and dust on the floor may accumulate inside. There were problems such as fluctuations in operating sensitivity due to moisture absorption.

[Purpose of the invention]

The purpose of the present invention is to detect water leakage from water-cooled equipment installed mainly indoors at an early stage, promptly stop the supply of cooling water, and minimize damage caused by water leakage. The objective is to provide a detection device that is improved and does not malfunction.

[Summary of the invention]

The detector detects the resistance between two detection cables (wires) and determines whether there is a water leak. Therefore, it is necessary to prevent damage to this cable, to make it insensitive to temporary small amounts of water during cleaning, and to prevent fluctuations in detection sensitivity due to adhesion of dust. For this purpose, the above-mentioned problems may be solved by making the detection cable embedded in the floor and housed within a protective cover. [Embodiment of the Invention] The drawings will be explained below.

Figure 1 shows the configuration according to the present proposal. Reference numeral 16 denotes a water collection groove constructed around 20, a part of which is connected to a drain pipe 17 so that water flowing into the water collection groove 16 can be discharged outside. FIG. 2 shows a side view of FIG. Figure 3 shows the arrangement of parts inside the water collection groove. 18 is a protective cover formed into a mouth shape and inserted into the water collecting groove 16, and its upper surface is made to be flush with the floor surface or slightly lower. Reference numeral 19 denotes a detector holder, which is fixed at one end to the protective cover 18 and at the other end to the water leakage detector 11, so that the height of the water leakage detector 11 is h from the bottom surface of the water collection groove 16, and it is not shifted to the left or right. It is held so that it is approximately at the center of the protective cover 18. A plurality of water flow holes 20 are provided on both sides of the protective cover 18, and the width of the water flow holes 20 is set to be slightly larger than h.

The advantage of this structure is (2) When a small amount of water temporarily flows in, such as when cleaning the floor, the water that flows into the water collection groove 16 will diffuse inside the water collection groove 16, and the water level will not rise to h. Water protection cover 18
Since the water flows along the surface of the water leakage detector 11, it does not come into contact with the water leakage detector 11, thereby preventing malfunctions.

2. Since there are no projecting parts on the floor, there is no problem in moving equipment or walking. - 3. Since the water leakage detector 11 is located inside the protective cover 18, it will not be mechanically damaged and will not be subject to dust build-up. The fluctuations in operating point and sensitivity can be ignored.

4. During inspection, the protective cover 18 can be pulled out at the same time, making the work easier.

5. By adjusting the drainage flow rate of the drain pipe 17, it is possible to set the minimum detection amount (the amount of load when the water level inside the water collection groove 16 rises to h).

FIG. 4 shows another implementation sequence for further speeding up the leakage water detection time in the above configuration. 21 is a protective cover, 22 is a plurality of notches provided on both sides of the protective cover 21, 23 is a plurality of protrusions provided on the bottom surface of the water collection groove 16,
Its height is made equal to the water level detection height h. In general, when leaking water occurs, it is unlikely that it will spread evenly around the point where it drips onto the floor, and it may be difficult to spread out evenly around the point where it drips onto the floor. Normally, the amount of outflow increases in a certain direction.

According to the structure shown in FIG. 4, these inflow waters accumulate in the area partitioned by a plurality of protrusions 23 (indicated by 8 in the figure).
Since its volume is much smaller than that of the structure shown in FIG. 2, even if the same flow rate of water flows in, the rate of rise in the water level will be greater, making it possible to detect it in a short time. Further, if the shape of the protrusion is made into a chevron shape as shown in the figure, it is convenient for cleaning inside the groove.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the implementation row of the leakage water detection device of the present invention, Fig. 2 is a detailed side view of a part of Fig. 1, and Fig. 3 (a) is a
Detailed sectional view of the water collection groove in Figure 2)) is a side sectional view of (A),
FIG. 4 shows another embodiment of the leakage water detector of the present invention, (
A) is a vertical cross-sectional view of the water collection groove, (B) is a cross-sectional view of (A), (C) is a cross-sectional perspective view of (A), and Figure 5 is a schematic diagram of a conventional leakage water detection system. Figure 6 is a side view of a part of Figure 5, Figures 7 and 8 (a) are explanatory diagrams of the detector fixed in Figure 5,
FIG. 8(B) is a side view of FIG. 8(C). 1...Equipment installation room, 1a...Installation room floor surface, 2...
Installation equipment, 3... Cooling pipe line, 4... Water pipe connection port,
5... Water pipe, 6... Manual stop valve, 7... Cooling water cutoff valve, 8... Cooling water device.

Claims (1)

[Claims] 1. In a leakage detection system that installs leakage water detectors around water-cooled equipment and stops the supply of cooling water or issues an alarm based on the detection signal, there is a water collection groove around the installed equipment and a water inflow into the groove. It has a water drain pipe, and inside the groove there is a protective cover that covers the top and sides and has an open bottom surface and has a height where the top surface is almost flush with the floor surface and multiple water inlets on both sides. A leakage water detection device characterized by being housed and holding and fixing a detection wire at a specified position on the inner surface of a protective cover.