JP2009156839A - Water leakage detecting method of water supply line, and water shut off valve with water leakage detecting function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein an electric method such as a cable system with electric wiring and a wireless system is conventionally used as a water leakage detecting method of water supply line, while an accident such as disconnection frequently occurs, needing great effort for construction, especially, it is difficult or impossible to detect water leakage by minute flow due to loose tightening of a faucet plug, aging of packing or the like. <P>SOLUTION: An inner valve object 43 for blocking an impeller rotation channel if the flow rate reaches a predetermined value or more, and an intermediate axis channel 33 communicating with the impeller rotation channel 41 are disposed. An on-off valve 3 on a main valve secondary side opening or closing with the flow rate is set in the secondary side channel of a channel main on-off valve of the water shut off valve, and an impeller mechanism rotated by water leakage flow coming into the impeller rotation channel through the intermediate axis channel is disposed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a water leak detection method for water pipes for detecting leaks in water pipes due to minute flow rates, such as loosening of faucet faucets or aging of water stop packings, and a water stop cock with a water leak detection function used therefor It is.

  Conventionally, as shown in, for example, Patent Document 1, a water leak detection method for a water pipe is a plate-like electrode that contacts the ground, one end is in contact with water in the water pipe, and the other end is on the ground via a manhole. Measure the ground current that flows by the AC power that applies a constant AC voltage between the lead wire drawn out, the electrode and the other end of the lead wire, and the AC voltage output from this AC power source. There has been a method of determining water leakage when the value exceeds a predetermined value.

  In such a wired system using electrical wiring such as lead wires, the flow sensor and automatic shutoff valve installed in the ground communicates with the water flow controller installed on the ground via electrical wiring, so accidents such as disconnection It was easy to occur, and it required a lot of labor for the construction, and it also took cost. A wireless system according to Patent Document 2 is also proposed for such a wired system.

In contrast to the electrical water leakage detection means shown in Patent Documents 1 and 2, as a simple means of water leakage detection in the house, all the water taps in the house are closed and the rotation indicator of the water meter is rotated. There is also a way to check if you want to.
JP 2000-258280 A JP 2002-340300 A

  However, the electrical leakage detection means shown in Patent Documents 1 and 2 both require large-scale facilities and construction, and require a large amount of cost. In addition, the method of checking whether the rotation indicator of the water meter rotates with all the water taps closed is that when the amount of water leakage is small, it does not rotate or continues to watch for a certain amount of time even if it rotates. Otherwise, there was a problem that it could not be determined whether the rotation index was moving.

  Moreover, all the conventional water leak detection methods are performed as detection means by a separate device regardless of the stop cock and the water meter, and only the position of the water administrator who is not related to the end user is considered. However, it is the end user who turns the water meter due to water leakage and is charged up to the price of unused water, and the end user has the most interest in water leakage.

  In addition, water leakage due to loosening of faucet faucets or aging of water-stopping packing is often attributed to the carelessness and responsibility of end users. have. However, water conservation should be carried out with the cooperation of end users and water supply managers, and it is possible to quickly detect leaks due to loosening of faucet faucets and aging of water-stopping packings, which are difficult for users to notice in the aging society. It is necessary to deal with it.

  The present invention is intended to address the above-described problems, and integrates a water stopcock and a water leak detection mechanism that can also be set on the primary side of a water meter, and uses the water leak detection mechanism as a water stopcock with a water leak detection function. By setting it as the secondary flow path of the main valve opening / closing valve of the plug, if water leakage is confirmed, it can also serve as a shut-off valve by closing the stop cock as a means for blocking this Is.

  In other words, by setting a water leak detection mechanism on the primary side of the water meter, it is possible to quickly detect the idling of the water meter due to minute water leaks, so that end users can be greatly interested in water leaks. did. For this reason, an impeller rotating passage through which a leakage flow flows into the secondary side of the main valve opening / closing main valve of the stopcock and an impeller mechanism that rotates by the inflow of the leakage flow are provided. The leak was able to be confirmed.

  In addition, a transparent window is provided on the upper surface of the impeller rotating flow path to the outer surface of the water faucet so that the end user can easily leak water from the outer surface of the water faucet by visually checking the rotational flaw of the impeller. In addition, a magnet was embedded in the upper part of the impeller, and the pulse waveform output by the rotation of the impeller due to the water leakage flow was captured by a reading device so that the water leakage could be confirmed more clearly.

  Water supply by branch piping to general households is such that the main valve is open, and when the terminal faucet is opened, water is passed by the water supply pressure from the water distribution main, and the meter rotates. Therefore, if the impeller rotates due to the water flow pressure inside the plug by opening the terminal faucet, water leakage cannot be detected, so an internal valve is provided on the secondary valve on the secondary side of the main valve to pass through the plug. With respect to the normal water pressure, the inner valve body is configured to close the impeller rotating flow path.

  That is, when the main valve opening / closing main valve of the stop cock is open and the terminal faucet is closed, the water flow in the main cock does not move, but the main valve secondary side flow opening / closing valve A flow path is formed through the middle shaft flow path from the impeller rotation flow path to the main body secondary side, and if there is water leakage due to loosening of the water tap or aging of the packing, the water leakage flow is caused by this flow path to the main body secondary. When the normal flow rate flows through normal operation of opening the terminal faucet, the inner valve body is closed and water is passed through the impeller. The configuration is such that the impeller is not rotated by passing it to the secondary side of the main body without passing through the vehicle rotation passage.

  In addition, by installing this stopcock on the primary side of a water meter, it is possible to detect water leaks by reading meter wheel readings, impeller rotation and pulse waveforms by end users themselves, etc. In order to solve the cause, the main valve for opening and closing the channel is closed for the first time to shut off the water leakage.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a stop cock main body, the inflow port 11 from the water distribution main pipe opens to the primary side, and water flows into the outflow port 12 through the channel opening / closing main valve 2 by the ball valve body, A valve seat 31 and a casing 32 of the main valve secondary side flow opening / closing valve 3 are set in the upper part of the valve chamber 13 of the flow opening / closing main valve 2, and a holder frame 5 for storing the impeller 4 is supported on the upper part. It is fixed.

  The main valve secondary side flow path opening / closing valve 3 is a floating valve that is housed in a bowl-shaped casing 32, rises due to the water passage pressure in the normal terminal faucet opening operation, and settles by its own weight. A central shaft channel 33 communicating with the inlet 42 to the impeller rotating channel 41 formed by the holder frame 5 is opened in the part.

  The upper end portion of the central shaft channel 33 is fitted into the lower end portion of the holder frame 5, and the outer peripheral surface thereof is in sliding contact with the inner peripheral surface of the central shaft channel 33 to raise and lower the main valve secondary side channel on / off valve 3. To guide. The lower end of the holder frame 5 that fits in the upper part of the middle shaft flow path 33 is fitted with a C-shaped retaining ring 45 that projects from the inner periphery and supports the inner valve body 43 that opens and closes the impeller rotation flow path. A groove 44 is formed, and the inner valve body 43 is inserted into the lower end portion of the holder frame 5, and then the C-shaped retaining ring 45 is inserted into the insertion groove 44 to support the inner valve body 43 in the holder frame 5. Has been.

  The holder frame 5 is formed with an impeller rotating flow path 41 for accommodating the impeller at the upper portion and an inner valve chamber 51 for accommodating the inner valve element 43 at the lower portion, and the intermediate portion has a solid knot structure. The rotating support shaft 46 is embedded and penetrated and supported, and also includes a structure portion 52 that opens a flow path connecting the impeller rotation flow path 41 and the inner valve chamber 51.

  The impeller 4 is formed of a material such as Duracon that is easy to rotate even by a micro flow, and is provided with a rotation indicator portion 4a at the top and a rotating blade 4b at the shaft periphery, and standing through the structure portion 52 of the holder frame. The impeller rotating support shaft 46 is inserted and covered in a freely rotating state. Further, the lower end of the impeller rotating support shaft 46 is inserted into the inner shaft hole 43 a of the inner valve body 43 in the inner valve chamber 51 to guide the raising and lowering of the inner valve body 43.

  The inner valve body 43 has a disk shape as shown in FIG. 4, and the impeller rotation support shaft 46 is inserted into the center shaft hole 43a in a free state. As described above, the inner valve body 43 is accommodated in the inner valve chamber 51 and is a C-shaped retaining ring. The bottom portion of the inner valve body 43 is smoothly blocked by the inlet 45 and the leaked water flowing from the middle shaft passage 33 of the main valve secondary side passage opening / closing valve 3 smoothly flows into the impeller rotation passage 41. An inflow groove 43b is formed in a cross shape.

  The flow path communicating from the inner valve chamber 51 to the impeller rotation flow path 41 is divided into a circular groove flow path 52a formed in the bottom of the holder frame structure 52 and circular groove flow paths 52a on both sides of the outer diameter. It consists of two vertical flow paths 52b, 52b set at a position where a part of the crossing. The water leakage flow from the inner valve chamber 51 flows into the vertical flow path 52b from the intersection 52c between the circular groove flow path 52a and the vertical flow path 52b.

  A flange 53 that engages with the upper surface of the casing 32 of the main valve secondary side flow path opening / closing valve 3 is provided on the upper portion of the holder frame 5, and an encircling protrusion 53 a is formed on the outer peripheral end of the flange 53. Four notches 53b are formed in a cross shape with respect to the outer peripheral surface.

  A water stopcock with a water leakage detection function configured as described above is provided when a terminal faucet is opened with the main valve 2 opened by the operation handle 2a of the flow path opening / closing main valve 2. The water flow from the inflow port 11 pushes up the main valve secondary side flow path opening / closing valve 3 by the feed water pressure from the pipe and separates from the valve seat 31 to the secondary side outflow port 12 from between the ribs 32a of the casing 32. Pass water, turn the water meter and water will come out from the faucet.

At this time, the water flow simultaneously flows into the inner valve chamber 51 through the middle shaft flow path 33 of the main valve secondary side flow path opening / closing valve 3, but the water flow pressure inside the plug pushes up the inner valve body 43, It does not flow into the impeller rotating flow path 41 because it closes the circular groove flow path 52a and closes the flow path.
The circular groove channel 52a is configured to have a smaller diameter than the interval between the two vertical channels 52b corresponding to the blade surface position that gives rotational force to the impeller rotor blades at the upper portion thereof. Since the diameter of the holder frame 5 is reduced by reducing the diameter, the diameter of the inner valve body 43 and the diameter of the holder frame 5 can be increased to match the interval between the two vertical flow paths 52b. In such a case, a plurality of vertical flow paths may be formed above the inner valve body 43.

  When water leakage occurs, the water leakage flow flows into the inner valve chamber 51 through the central shaft flow path 33 and does not generate a flow rate due to the operation of the terminal water faucet. Therefore, the structure of the holder frame from the cross inflow groove 43b at the bottom of the inner valve body 43 While flowing in the circular groove channel 52a at the bottom of the part 52, the angle is determined by the inflow from the intersection 52c with the vertical channel 52b while circulating in the groove, and each of the two vertical channels 52b is turned as a swirl flow. It flows into the impeller rotating flow path 41 so as to collide with the rotating blade 4b from the two opposite directions, and the impeller 4 is rotated.

  The start of the water meter is normally 0.01 cubic meter / hour as the old standard of JWWA B127 Table 4, so the impeller must start rotating at a lower flow rate than the water meter starts. Therefore, with the above-described flow path configuration, rotation started at about 100 milliliters / minute, and at this time, the rotation speed could be set at about 150 rotations / minute.

  The water leakage flow that has rotated the impeller 4 flows out to the upper flange 53 of the holder frame 5 surrounded by the surrounding ridge 53a, and is discharged from the four notches 53b to the outlet 12 on the stop cock secondary side. The The upper part of the flange 53 at the upper part of the holder frame is a rotation indicator space 15 of the impeller 4 that passes through the top of the water faucet body 1, and is covered with a transparent plate 14 through the transparent plate from the top of the water faucet body 1. The rotational wrinkles of the impeller 4 can be confirmed visually.

  As another embodiment, as shown in FIG. 9, a magnet 4c is embedded in the side portion of the tip rotation indicator portion 4a that the impeller 4 rotates (after the embedding, the magnet 4c is completely covered with a cap so that it can be seen from the outside. In addition, a support frame 61 is provided at the cover position, the magnetic force sensor 6 is set, and the pulse waveform output intermittently due to the rotation of the impeller 4 due to the leakage water flow is detected by reading with a reading device.

  For example, when a DC voltage of 3 V is applied to the magnetic force sensor 6, the magnetic lines of force are blocked or released according to the rotation of the impeller 4, so that an intermittent output of 3V−0V−3V−0V. The pulse waveform as shown in Fig. 5 is displayed on the reading device, and water leakage is captured more reliably. As the reading device, for example, an analyzing recorder manufactured by Yokogawa Electric is used.

  FIG. 11 shows a state in which the water faucet with a water leak detection function according to the present invention is set on the primary side of the water meter and configured in the water meter unit, and the water faucet detects water leakage by configuring in this way. In this case, the main valve 2 can be closed immediately by the operation handle 2a of the flow path opening / closing main valve 2, and the convenience of being able to check the water leakage by the user himself / herself in addition to the presence or absence of water leakage at every meter reading. There is.

  Since the present invention is configured as described above, it is difficult to find until now, and the meter is rotated by flowing water unnecessarily, putting an extra burden on the user or causing trouble, etc. As a result, it was possible to easily detect the micro water leakage due to the water and to contribute to the saving of water resources.

1 shows an embodiment of a water stop cock with a water leak detection function according to the present invention, and is a longitudinal cross-sectional side view of the whole water stop cock with a main section showing a water-passage in the open state of a flow path opening / closing main valve as a cutaway cross section. Similarly, an enlarged vertical cross-sectional side view of the top of the stop cock showing the relationship between the main valve secondary side flow path opening / closing valve, the inner valve body and the impeller rotation flow path, and the inflow passage path of the leakage flow Similarly, the longitudinal cross-sectional side view of the impeller holder frame part which shows the structure of the impeller rotation flow path and the holder frame which accommodated the impeller Similarly, AA sectional view of FIG. Similarly, a bottom view and a longitudinal sectional side view of the valve body showing the structure of the inner valve body Similarly, a longitudinal sectional side view of the impeller holder frame Similarly, top view of impeller holder frame Similarly, bottom view of impeller holder frame Similarly, a longitudinal cross-sectional side view of the entire stop cock showing the structure according to the embodiment in which a magnet is embedded in the impeller index portion and the pulse waveform due to the index portion rotation is read and detected. Similarly, a pulse waveform reading diagram in the case of embedding a magnet in the impeller index portion and reading and detecting a pulse waveform due to rotation of the index portion The side view of the water meter unit which made the principal part which shows the state which set the water faucet with a water leak detection function by this invention to the primary side of a water meter, and was comprised in the water meter unit made into the notch cross section

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stop cock main body 11 Primary side inlet 12 from the water main of a stop cock main body Secondary side outlet 13 of a stop cock main body Valve chamber 14 of a flow-path main valve 14 Cover cover transparent of impeller rotation indicator space Plate 15 Impeller rotation indicator space at the top of the stop cock body 2 Flow path opening / closing main valve 2a by ball valve body of the stop cock body Operation handle 3 of the flow path opening / closing main valve 3 Main valve Secondary side flow path opening / closing valve 31 Main valve Valve seat 32 of the secondary side flow path on / off valve Casing 32a of the main valve secondary side flow path on / off valve Casing rib 33 of the main valve secondary side flow path on / off valve casing Middle shaft flow of the main valve secondary side flow path on / off valve Road 4 Impeller 4a Impeller rotation indicator portion 4b Impeller rotation blade 4c Indicator portion embedded magnet 41 Impeller rotation passage 42 Inlet 43 to impeller rotation passage Inner valve element 43a for opening and closing the impeller rotation passage Center shaft hole 43b of inner valve body Leakage flow inflow groove 44 on bottom surface of inner valve body C-shaped retaining ring of impeller holder frame Entrance groove 45 C-shaped retaining ring 46 for supporting the inner valve body Impeller rotating support shaft 5 Impeller holder frame 51 Inner valve chamber 52 Impeller holder frame structure 52a Circular groove channel 52b on the bottom of the holder frame structure Vertical flow path 52c that intersects with the circular groove flow path Crossing portion 53 between the circular groove flow path and the vertical flow path 53a Flange 53a on the upper surface of the holder frame Enclosure protrusion 53b on the upper surface flange of the holder frame 6 61 Magnetic sensor support frame

Claims (6)

An inner valve body that closes the impeller rotation flow path with a flow rate greater than or equal to a predetermined flow rate,
A main valve secondary side flow path opening / closing valve that opens at a flow rate of the predetermined value or more provided with an intermediate shaft flow path communicating with the inlet to the impeller rotation flow path on the middle shaft;
Set the secondary side flow path of the main valve of the stop cock,
A water stop cock provided with an impeller mechanism that rotates by a leakage flow that flows into the impeller rotation passage through the middle shaft passage of the main valve secondary passage opening / closing valve is attached to the water pipe, and the rotation of the impeller Water leak detection method for water supply pipes characterized by detecting water leaks   The water leak detection method for water pipes according to claim 1, wherein a stop cock provided with an impeller mechanism rotating by a water leak flow is attached to the primary side of the water meter.   A magnet is embedded in the upper part of the rotating impeller, and a magnetic sensor is set at the cover position so that the pulse waveform intermittently output by the rotation of the impeller caused by the leakage flow is captured by the reading device to detect leakage. The water leak detection method for water pipes according to claim 1, An inner valve body that closes the impeller rotation flow path with a flow rate greater than or equal to a predetermined flow rate,
A main valve secondary side flow path opening / closing valve that opens at a flow rate of the predetermined value or more provided with an intermediate shaft flow path communicating with the inlet to the impeller rotation flow path on the middle shaft;
Set the secondary side flow path of the main valve of the stop cock,
A water stopcock with a water leakage detection function, characterized in that an impeller mechanism that rotates by a water leakage flow that flows into the impeller rotation flow path through the center shaft flow path of the main valve secondary flow path opening / closing valve is provided.   5. With a water leak detection function according to claim 4, wherein a transparent window is provided on the upper surface of the impeller rotating flow path that passes through the outer surface of the water faucet, so that the rotational flaw of the impeller can be visually confirmed from the outer surface of the water faucet. Stopcock   Readout device that captures and reads the pulse waveform that is intermittently output by rotation of the impeller caused by the leakage of the water and the faucet body in which the magnet is embedded in the upper part of the rotating impeller and a magnetic sensor is set at the cover position The water stop cock with a water leak detection function according to claim 4

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