JP2019152494A - Check valve device having water leakage blocking function - Google Patents

Abstract

To provide a check valve device having a water leakage blocking function that can certainly block the water leakage and has a structure solely requiring a small number of components.SOLUTION: The check valve device includes: a main valve 6 having a large circulation opening area; an auxiliary valve 9 having a small circulation opening area; a needle 14 moving in a fluid channel A with a movement of the main valve 6 or auxiliary valve 9; a sensor 17 for detecting the movement of the needle 14 and outputting a detection signal; a valve closing mechanism 40 that drives the main valve 6 and auxiliary valve 9 so that both of them block the fluid by controlling the movement in the fluid channel A; and a controller 30 for controlling the driving of the valve closing mechanism 40 on the basis of the detection signal coming from the sensor 17.SELECTED DRAWING: Figure 1

Description

  The present invention provides a check valve having a water leakage blocking function capable of blocking water leakage when detecting water leakage while detecting water leakage by providing the water pipe drawn into a house or building. Relates to the device.

  Leakage of water pipes in buildings not only increases the burden of water charges, but also causes damage to buildings, households, etc. depending on the degree of water leakage and the location of water leakage, resulting in significant damage to residents. In particular, in apartment buildings such as condominiums, hotels, etc., leakage at one location can cause a great deal of damage to many houses and rooms downstairs. In reality, leakage damage frequently occurs to a considerable extent. is doing. Therefore, especially in apartment buildings where damage is easy to spread and the residents are not in close contact, and hotels where people are staying in an unspecified number of people, water leakage is constantly monitored. It is necessary to issue warnings to residents, guests, building managers, etc. to take action and prevent the spread of damage.

  There are two causes of water leakage that damage buildings and household assets. The first is minute water leakage that occurs naturally due to aging of water pipes, or a considerable amount of water leakage. The second is artificial water leakage due to forgetting to close the faucet, malfunction of the facility using the water supply or incorrect operation. In order to prevent the leakage of water, it is necessary to detect these two types of water leakage.

  As a method of monitoring water leakage in a building, as described in Patent Document 1, a method of detecting water leakage by measuring acoustic vibration transmitted to a water pipe, or as described in Patent Document 2, ultrasonic waves are used. Discloses a method for detecting water leakage. However, these require a large-scale device and can only be detected if there is a considerable amount of water leakage. Also, it cannot cope with artificial water leakage such as forgetting to close the faucet.

  On the other hand, Patent Document 3 discloses a water leakage detection method in which a pulse-like signal is taken out by a sensor attached to a rotary flow meter, and this data is collected and analyzed to determine the presence or absence of water leakage. However, this method is intended only for the detection of spontaneously small water leaks, and cannot cope with artificial large-scale water leaks.

  The system of patent document 4 is disclosed as a method of detecting both a small amount of water leak and a large amount of water leak with respect to the above prior art. In this system, a check valve is formed by a main valve and a sub valve, and this check valve is used for detecting water leakage. This system is provided with a main valve with a large flow opening area, a sub valve with a small flow opening area, and a mover that moves with these movements. The movement of the mover is detected by a sensor, and a pulse signal from the sensor is obtained. Based on this, a small amount of water leakage and a large amount of water leakage are discriminated, an alarm is issued when there is a small amount of water leakage, and a shut-off valve of the water pipe is closed when there is a large amount of water leakage.

JP 2002-122502 A JP 2002-131170 A JP 2000-205447 A Japanese Patent No. 3650812

  However, in the check valve of the system of Patent Document 4, even if a small amount of water leakage and a large amount of water leakage can be discriminated, the structure of the water leakage is not blocked, and the water leakage itself cannot be blocked. In addition, in the case of a large amount of water leakage, the on-off valve of the water pipe is closed, but the on-off valve itself is a member outside the check valve, and not only can the water leakage be blocked by the check valve itself. In addition, a large number of members for shutting off the external on-off valve are necessary, which causes a complicated problem.

  The present invention has been made in consideration of such conventional problems, and it is possible to reliably shut off water leakage only by a check valve, and it is possible to shut off water leakage with a structure without increasing the number of components. It aims at providing the non-return valve apparatus which has a function.

The check valve device having a water leakage blocking function of the present invention is urged toward the inlet side of the fluid passage by a casing formed so as to penetrate a cylindrical fluid passage and a main valve spring, and the inlet side The main valve having a large flow opening area that allows passage of a large amount of liquid by movement toward the outlet side of the fluid passage and the sub valve spring is biased toward the main valve while blocking the passage of fluid by movement to A sub-valve having a small flow opening area that allows passage of a small amount of fluid by movement toward the outlet side of the fluid passage while blocking passage of fluid by movement in the direction of the main valve, and is attached to the sub-valve. A mover that moves in the fluid passage as the main valve or the sub-valve moves toward the outlet side, and a casing that is disposed on the outlet side to detect movement of the mover. Detection And a valve closing mechanism that is disposed on the outlet side of the fluid passage and that drives both the main valve and the subvalve to shut off the fluid by controlling movement in the fluid passage. And a controller for controlling the driving of the valve closing mechanism based on a detection signal from the sensor.

  In the present invention, the valve closing mechanism includes a passage through which the fluid passes and at least an outer surface is a magnet. The valve closing mechanism is attached to the sub valve and is located on the outlet side and reciprocates in the fluid passage. And a coil provided in the casing so as to correspond to the plunger and controlled by the controller to generate a magnetic field for movement of the plunger.

  The controller includes a determination unit that determines whether the water leakage is a small amount or a large amount of water leakage based on a detection signal from the sensor, and the valve closing mechanism is configured to block the fluid based on the determination to the determination unit. A driving unit for driving, and a reset unit for stopping driving by the driving unit.

  In addition, the reset unit detects that the button reset unit that forcibly stops driving the drive unit by operating the reset button and the use of the water meter after a long period of non-use, drives the drive unit. And a monitoring reset unit that automatically stops.

  A guide rail for guiding the valve closing mechanism to move linearly is provided on the inner surface of the casing on the outlet side.

  The plunger has a plunger body that is formed of a resin and is attached to the subvalve so that the flow path through which the fluid passes is formed, and the magnet is formed on an outer surface of the plunger body. Has been.

  In the present invention, the sub-valve moves and opens due to a small amount of water leakage, while the main valve moves and opens due to a large amount of water leakage, and the mover moves along with the movement of these valve bodies. The sensor detects it and outputs it to the controller. The valve drive mechanism forcibly closes the main valve and the sub-valve under the control of the controller to block water leakage.

  In the present invention, the movable element and the sensor monitor water leakage, and the controller drives the valve closing mechanism to shut off the water leakage according to the detection result of the sensor. Therefore, even if a small amount of water leaks or a large amount of water leaks, it can be shut off only by the check valve device, so that it is possible to reliably shut off the water leak. In addition, since leakage of water is blocked only by the components of the check valve device, it is possible to block leakage of water with a simple structure that does not require many components.

It is sectional drawing which shows the water leakage interruption | blocking state in the non-return valve apparatus of one Embodiment of this invention. It is sectional drawing which shows the small amount of water leak state in a non-return valve apparatus. It is sectional drawing which shows a lot of water leakage states in a non-return valve device. It is a block diagram which shows the basic composition of a non-return valve apparatus. It is a block diagram which shows the structure of a non-return valve apparatus in detail.

  1 to 3 show a check valve device 1 according to an embodiment of the present invention. FIG. 1 shows a normal state in which no fluid leaks, and FIG. 2 shows a state in which a sub valve 9 is opened due to a small amount of water leakage. FIG. 3 shows a state where the main valve 6 is opened due to a large amount of water leakage. As will be described later, when water leakage is detected, the valve closing mechanism 40 is driven to forcibly close the main valve 6 and the sub-valve 9, thereby closing the fluid passage A and entering the state shown in FIG.

  As shown in FIGS. 1 to 3, the check valve device 1 includes a cylindrical casing 4 disposed between the inlet side pipe B and the outlet side pipe C. The casing 4 is formed by connecting an inlet side casing member 18 connected to the inlet side pipe line B and an outlet side casing member 16 connected to the outlet side pipe line C by screwing or the like.

In the casing 4, a main valve seat 5 that can be attached to and detached from the casing 4 and a main valve spring 7 in the fluid passage A are urged toward the inlet 2 toward the inlet 2 side, The main valve 6 having a large flow opening area provided with the sub-valve seat 8 and the sub-valve spring 10 in the fluid passage A is biased toward the inlet 2 side toward the main valve 6 (sub-valve seat 8). A sub-valve 9 having a small flow opening area and a mover 14 provided in the fluid passage A on the outlet 3 side of the sub-valve 9 and moving in conjunction with the movement of the main valve 6 or the sub-valve 9 toward the outlet 3 And a sensor 17 that outputs a detection signal to the controller 30 when the mover 14 moves to a predetermined position and enters the detection region.
Since the main valve 6 and the sub-valve 9 move depending on the presence or absence of water leakage, it is preferable that the whole is formed of resin. The main valve 6 and the sub-valve 9 are in contact with the main valve seat 5 and the sub-valve seat 8, respectively. The packing 12 formed in a tubular shape with a material such as hard rubber is embedded.

  The mover 14 is formed in a thin disk shape through which the flow path 15 penetrates, and is arranged perpendicular to the fluid passage A. The mover 14 is made of a metal such as stainless steel, aluminum, or copper alloy. The sensor 17 is a normal proximity switch that switches by changing the impedance when the movable element 14 approaches, and is embedded in the outlet casing member 16.

  In addition to the above, in the check valve device 1 of this embodiment, a valve closing mechanism 40 and a controller 30 are provided.

The valve closing mechanism 40 is formed by a plunger 41 and a coil 42, which are arranged on the outlet side casing member 16 in the casing 4. The plunger 42 has a plunger main body 43 attached to the auxiliary valve 9 and a magnet 44 attached to the plunger main body 43.
Here, in the auxiliary valve 9, a shaft portion 19 that extends toward the outlet 3 along the fluid movement direction in the fluid passage A is integrally formed, and a plunger main body 43 is attached to the distal end side of the shaft portion 19. Yes. The plunger main body 43 is formed in a drum shape having a diameter close to the inner surface of the casing 4 on the outlet 3 side (outlet side casing member 16), and the magnet 44 is screwed to the outer surface of the drum-shaped plunger main body 43 by welding or the like. It is fixed.
The drum-shaped plunger main body 43 has a fluid passage 45 passing therethrough and is entirely formed of resin. Thus, the flow path 45 is formed in the plunger main body 43 and the plunger main body 43 is formed of resin, whereby the weight of the plunger 41 can be reduced, and the plunger 41 can move smoothly in the casing 4.

  The plunger main body 43 is formed in a drum shape having a diameter close to the inner surface of the outlet side (outlet side casing member 16) of the casing 4, so that the magnet 44 on the outer surface of the plunger main body 43 approaches the inner surface of the outlet side casing member 16. We face in state that we did. The magnet 44 is formed to be thin and fixed to the outer surface of the plunger main body 43. Since the magnet 44 is thin, an increase in the weight of the plunger 41 can be suppressed.

  The coil 42 is embedded in the outlet side casing member 16 so as to be closer to the outlet side conduit C than the sensor 17. At this position, the coil 42 circulates around the outside of the plunger 41, and generates a magnetic field for moving the plunger 41 toward the inlet 2 by energizing the coil 42. Energization of the coil 42 is controlled by the controller 30. When the plunger 41 moves to the inlet 2 side, the plunger 41 moves the auxiliary valve 9 to the inlet 2 side and simultaneously moves the main valve 6 to the inlet 2 side via the auxiliary valve 9. As the valves 9 and 6 move toward the inlet 2 side, the sub-valve 9 and the main valve 6 come into contact with the valve seats 8 and 5, respectively, so that the fluid is forcibly cut off. Thereby, since the fluid does not flow to the downstream side of the fluid passage A, the water leakage can be forcibly blocked.

  In this valve closing mechanism 40, since the movement of the plunger 41 toward the inlet 2 is stopped by stopping energization of the coil 42, the moving force of the main valve 6 and the sub valve 9 in the same direction is released. . For this reason, the forced cutoff of the main valve 6 and the auxiliary valve 9 is released. As a result, the main valve 6 moves to the outlet 3 side when there is a large amount of water leakage, and the sub-valve 9 returns to the normal operation of moving to the outlet 3 side when there is a small amount of water leakage.

  In this embodiment, the guide rail 46 is provided so as to correspond to the plunger 41. A plurality of guide rails 46 are formed on the inner surface of the outlet side casing member 16 so as to extend along the direction of fluid movement. A rail groove (not shown) into which the guide rail 46 is fitted is formed on the outer surface of the plunger main body 43 with respect to the guide rail 46. The guide rail 46 guides the plunger 41 so as to move linearly, whereby the plunger 41 does not rotate carelessly and can be moved stably.

FIG. 4 is a block diagram of the control system of this embodiment, and FIG. 5 is a block diagram showing the details thereof.
As shown in FIG. 4, the sensor 17 detects the movement of the mover 14 attached to the sub valve 9 and outputs a detection signal to the controller 30. The controller 30 includes a determination unit 31, a reset unit 32, and a drive unit 33. The determination unit 31 receives a detection signal from the sensor 17 and determines whether the water leak is a small amount or a large amount based on the input detection signal.
That is, the detection signal of the sensor 17 is composed of a pulse signal and a pulse signal width. When the determination unit 31 of the controller 30 receives the next pulse signal within a time set longer than the pulse signal width, the number of pulse signals is counted. To do. When the count number reaches a predetermined value, the determination unit 31 determines that there is a small amount of water leakage. When this count continues further, the determination unit 31 determines that there is a large amount of water leakage. In this embodiment, the drive unit 33 drives the valve closing mechanism 40 in any determination result of a small amount of water leakage and a large amount of water leakage.

  Based on the determination result from the determination unit 31, the drive unit 33 energizes the coil 42 to drive the valve closing mechanism 40. The reset unit 32 stops driving by the driving unit 33. Specifically, the reset unit 32 stops energization of the coil 42 by the drive unit 33. The configuration of the reset unit 32 will be specifically described with reference to FIG.

  As shown in FIG. 5, the reset unit 32 of the controller 30 includes a button reset unit 35, a monitoring reset unit 36, and a sub-reset unit 34 that operates as necessary.

  The button reset unit 35 forcibly stops the drive of the drive unit 33 when the reset button 37 is operated. The reset button 37 is provided in a building such as a house or a hotel separately from the controller 30, and is provided to stop the drive of the drive unit 33 by interruption. For example, it is possible to cope with a case where it is necessary to urgently cancel the supply stop of fluid based on water leakage, or when it is desired to supply fluid immediately after completion of water leakage repair work.

The monitoring reset button 36 is used to cancel the at-home safety confirmation alarm. A water meter 50 is attached to the water pipe, and a meter monitoring unit 51 monitors usage measurement of the water meter 50. If the usage meter of the water meter 50 is not measured for a long period (for example, one week), the meter monitoring unit 51 determines that the meter is not used for a long period due to the absence of residents, and drives the driving unit 31 of the controller 30 to drive the main valve 6 and the auxiliary valve. The fluid is shut off by the valve 9. As a result, the water supply is suspended.
In addition, the meter monitoring unit 51 turns on the alarm device 52 and performs confirmation through a telephone line. Further, the meter monitoring unit 51 notifies the centralized management room 53 of a long-term absence through a telephone line, a net line, or the like. When this notification is received, the central management room 53 can confirm the visit.
On the other hand, when the meter monitoring unit 51 confirms the usage amount measurement of the water meter 50 after the water meter 50 is not used for a long period of time, the monitoring reset unit 36 stops driving the driving unit 33. As a result, the fluid shutoff by the main valve 6 and the subvalve 9 is released, so that water can be used.
Therefore, by providing such a monitoring reset unit 36, it is possible to manage the fluid supply according to the absence or at-home situation.

The sub-reset unit 34 receives the determination result from the determination unit 31. Only when the determination result is a small amount of water leakage, the drive of the drive unit 33 is automatically stopped. Thereby, in the case of a small amount of water leakage, driving of the valve closing mechanism 40 is stopped, and the forced water blocking by the auxiliary valve 9 and the main valve 6 is released. This is because a small amount of water leakage is caused mainly by naturally occurring water leakage such as aging of water pipes, and the amount of water leakage is small. Note that when the determination result is a large amount of water leakage, the sub-reset unit 34 does not stop driving the drive unit 34. Thereby, in the case of a large amount of water leakage, the fluid is forcibly shut off by the main valve 6 and the sub valve 9. A large amount of water leakage is mainly due to forgetting to close the faucet, failure of water supply facilities, and operation mistakes, and it is necessary to stop water leakage reliably.
The sub-reset unit 34 can be omitted as necessary. Thereby, not only a large amount of water leakage but also a small amount of water leakage, the valve closing mechanism 40 is driven to forcibly shut off the fluid.

  FIG. 1 shows a state in which no fluid flows, the pressure in the inlet side pipe B and the pressure in the outlet side pipe C are equal, and the main valve 6 is driven by the elastic force of the main valve spring 7 and the sub valve spring 10. The secondary valve 9 is in contact with the secondary valve seat 8 by the elastic force of the secondary valve spring 10.

  In contrast to the state shown in FIG. 1, if there is a slight water leak in the outlet side pipe C, the pressure in the pipe C gradually decreases, and the differential pressure between the inlet side pipe B and the outlet side pipe C becomes the sub valve spring. Exceed 10 elastic force. Then, as shown in FIG. 2, the auxiliary valve 9 is pushed to the outlet side, the fluid 21 flows with a small flow opening area, the fluid passage A is opened, and the movable element 14 and the plunger 41 together with the auxiliary valve 9 are on the outlet 3 side. To the detection region of the sensor 17, the sensor 17 detects the mover 14 and outputs it to the controller 30. Based on the detection signal at this time, the determination unit 31 of the controller 30 determines a small amount of water leakage, and drives the drive unit 33 based on the determination result.

If there is a considerable amount of water leakage in the outlet side pipe C, the pressure in the outlet side pipe C drops rapidly, and the differential pressure cannot be eliminated simply by opening the auxiliary valve 9. That is, when the flow rate increases and the pressure difference between the inlet side and the outlet side of the auxiliary valve 9 is always larger than the urging pressure of the auxiliary valve spring 10 that urges the auxiliary valve 9 against the auxiliary valve seat 8, the auxiliary valve 9 Will remain open. In this case, when the differential pressure between the inlet side pipe B and the outlet side pipe C exceeds the combined elastic force of the main valve spring 7 and the sub valve spring 10, as shown in FIG. The fluid 22 flows with a large flow opening area, the fluid passage A is opened, the movement of the main valve 6 moves the mover 14 to the outlet side, and the detection by the sensor 17 is performed. Is output. Based on this detection signal, the determination unit 31 of the controller 30 determines a large amount of water leakage, and drives the drive unit 33 based on the determination result.

  As described above, the determination unit 31 drives the drive unit 33 in both a small amount of water leakage and a large amount of water leakage. That is, the drive unit 33 energizes the coil 42 of the valve closing mechanism 40 to cause the coil 42 to generate a magnetic field and move the plunger 41 to the inlet 2 side. When the plunger 41 moves to the inlet 2 side, the plunger 41 moves the auxiliary valve 9 to the inlet 2 side and simultaneously moves the main valve 6 to the inlet 2 side via the auxiliary valve 9. As the valve 9 and 6 move toward the inlet 2 side, as shown in FIG. Thereby, since the fluid does not flow to the downstream side of the fluid passage A, water leakage can be forcibly blocked.

According to the check valve device 1 of the present invention, the sub-valve 9 moves due to a small amount of water leakage, the main valve 6 moves due to the large amount of water leakage, the mover 14 moves, and the mover 14 is moved. The sensor 17 detects and outputs it to the controller 30, and the controller 30 drives the valve drive mechanism 40 to forcibly close the main valve 6 and the subvalve 9 to shut off the fluid. As a result, even if there is a small amount of water leakage or a large amount of water leakage, the fluid can be shut off only by the check valve device 1, so that it is possible to reliably shut off the water leakage. In addition, since leakage of water is blocked only by the constituent members of the check valve device 1, a simple structure that does not require many constituent members can be achieved.

DESCRIPTION OF SYMBOLS 1 Check valve apparatus 2 Inlet 3 Outlet 4 Casing 6 Main valve 7 Main valve spring 9 Sub valve 10 Sub valve spring 14 Movable element 17 Sensor 30 Controller 31 Determination part 32 Reset part 33 Drive part 35 Button reset part 36 Monitoring reset part 40 Valve closing mechanism 41 Plunger 42 Coil 43 Plunger body 44 Magnet 46 Guide rail A Fluid passage B Inlet side conduit C Outlet side conduit

Claims (6)

A casing formed so that a cylindrical fluid passage extends therethrough;
A flow that is biased toward the inlet side of the fluid passage by the main valve spring and blocks passage of fluid by movement toward the inlet side, while allowing passage of a large amount of liquid by movement toward the outlet side of the fluid passage. A main valve with a large opening area,
A flow opening area that is biased toward the main valve by the secondary valve spring and blocks passage of fluid by movement in the direction of the main valve, while allowing passage of a small amount of fluid by movement toward the outlet side of the fluid passage With a small side valve,
A mover attached to the sub valve and moving in the fluid passage as the main valve or the sub valve moves to the outlet side;
A sensor that is provided on the casing so as to be located on the outlet side, detects a movement of the mover, and outputs a detection signal;
A valve closing mechanism that is disposed on the outlet side of the fluid passage, and that drives both the main valve and the sub-valve to shut off the fluid by controlling movement in the fluid passage;
And a controller for controlling the driving of the valve closing mechanism based on a detection signal from the sensor. The valve closing mechanism includes:
A plunger that passes through the flow path through which the fluid passes and has at least an outer surface as a magnet, is attached to the sub-valve, is located on the outlet side, and is capable of reciprocating in the fluid passage;
The water leakage blocking function according to claim 1, further comprising: a coil provided in the casing so as to correspond to the plunger and generating a magnetic field for movement of the plunger under the control of the controller. A check valve device. The controller is configured to determine whether a small amount of water leakage or a large amount of water leakage based on a detection signal from the sensor;
A driving unit that drives the valve closing mechanism to block the fluid based on the determination in the determination unit;
The check valve device having a water leakage blocking function according to claim 1, further comprising: a reset unit that stops driving by the driving unit. The reset unit
A button reset unit for forcibly stopping driving of the drive unit by an operation on a reset button;
4. A leakage reset function according to claim 3, further comprising: a monitoring reset unit that automatically stops driving of the driving unit when it is detected that the water meter has not been used for a long period of time. Check valve device.   The check valve device having a water leakage blocking function according to claim 1, wherein a guide rail for guiding the valve closing mechanism to move linearly is provided on an inner surface on the outlet side of the casing. The plunger has a plunger body that is formed of a resin and is attached to the sub-valve so that the passage through which the fluid passes is a drum, and the magnet is formed on an outer surface of the plunger body. The check valve device having a water leakage blocking function according to claim 2.

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