JP6492150B1 - Pressure increase water supply device and water leak detector - Google Patents

Abstract

To provide an intensified water supply device and a water leak detector capable of detecting water leak with a simple and compact configuration. A pump device (14), an outer shell (33), a first check valve (31) provided in the outer shell (33), and an outer shell (33) are provided. A second check valve 32 provided on the secondary side, a relief port 33b provided between the first check valve 31 and the second check valve 32 of the shell 33, and a relief for opening and closing the relief port 33b. A decompression type backflow prevention device 12 provided on the primary side of the pump device 14 having a valve 34, and a first electrode 42 and a first electrode provided in the relief port 33b located radially outward of the relief port 33b And a water leak detector 18 having a second electrode 44 provided on the insulating packing 43 and located radially outward. [Selected figure] Figure 1

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a pressurized water supply device having a depressurization type backflow prevention device, and a water leak detector used for the boosted pressure water supply device.

  It is known that a pressure increasing water supply device used for a building or the like has a pressure reduction type backflow prevention device in order to prevent water from flowing back to the primary side of the device. Such a decompression type backflow prevention device is provided between the first check valve, the second check valve provided on the secondary side of the first check valve, and the first check valve and the second check valve. A relief valve provided in the middle chamber of the inner shell is provided in the tubular shell, and in a predetermined case, the relief valve is opened to release water in the middle chamber. Moreover, the structure provided with two pressure reduction type backflow prevention apparatuses is also known by the pressure increase water supply apparatus (for example, refer patent document 1).

  When the relief valve of the decompression type backflow prevention device is opened, there is a situation where a leak of the first check valve or the second check valve occurs, or a reverse siphon phenomenon occurs due to the negative pressure on the primary side. The case etc. may be mentioned. For this reason, when the relief valve of the decompression type backflow prevention device is opened and the water in the intermediate chamber is discharged, it is at the time of abnormality of the decompression type backflow prevention device or the pressure increase water supply device. There is a need for an intensified water supply device having a water leak detector having a function of detecting and displaying or notifying an alarm.

  For example, as a water leak detector, the structure which provides the piping by which two electrodes were provided in the inner surface on the secondary side of a relief valve can be considered. Further, in Patent Document 1, an electrode of a collective type drainage pipe for collecting and draining water leaked from the relief valve is connected to the relief holes of two decompression type backflow prevention devices, and an electrode is provided with two electrodes on the collective pipe. An arrangement is disclosed that uses a scheme.

  However, in the configuration using the electrode type water leak detector, if dew condensation occurs between the two electrodes, there is a possibility that the dew condensation water may cause a malfunction. In order to prevent this malfunction, a technique may be considered in which two electrodes are disposed apart from each other at a distance at which the two electrodes do not conduct even if condensation occurs.

Patent No. 4589278

  The above-described water leak detector has a long and thin shape in a configuration in which two electrodes are disposed apart from each other in order to prevent malfunction due to condensation. Since the pressurized water supply device is configured to be covered by the cover, it is difficult to secure a space for disposing a long and thin water leak detector in the cover, and there is a design limitation.

  In addition, the above-mentioned water leak detector requires an AC electrode circuit in the control panel, and it is necessary to separately provide an alarm panel for warning of water leakage, which causes a problem that the manufacturing cost of the pressurized water supply device increases. . That is, the circuit for detecting the conduction between the electrodes due to the water leakage is designed using the circuit for detecting the water level of the water receiving tank conventionally used. The circuit for detecting the water level in the water receiving tank is a low voltage AC circuit in order to avoid electric shock and prevent electrolysis because the electrodes are always submerged. However, only DC voltage can be input to the microcomputer. Therefore, the circuit for detecting the water level of the water receiving tank needs, for example, a transformer for stepping down the voltage of the power supply from 200 V to 12 V and a circuit for converting the AC circuit to a DC ON / OFF circuit. It was easy to become complicated. For example, it is conceivable to provide an impeller type flow meter and detect water leakage by rotation of the flow meter, but in order to detect water leakage, piping for introducing the water into the flow meter is required, and foreign matter in the water leakage There is also a problem that the configuration becomes complicated, such as the need for a filter for eliminating

  Then, an object of this invention is to provide the pressure increase water supply apparatus and leak detection apparatus which can detect leak with simple and small structure.

As one aspect of the present invention, the pressurized water supply device includes a pump device, an outer shell, a first check valve provided in the outer shell, and a second side of the first check valve provided in the outer shell. A second check valve provided in the housing, a relief port provided between the first check valve and the second check valve of the shell, and a relief valve for opening and closing the relief port, A pressure reducing type backflow prevention device provided on the primary side of a pump device, and a first electrode provided on the relief port and located radially outward of the inner circumferential surface of the relief port, provided on the first electrode And a water leakage detector having a second electrode provided on the insulating packing and located radially outward of the inner circumferential surface of the relief port .

As one aspect of the present invention, the water leak detector includes an outer shell, a first check valve provided in the outer shell, a second check valve provided in the outer shell, and a second check valve provided on the secondary side of the first check valve. 2) A check valve, a relief port provided between the first check valve and the second check valve of the outer shell, and a relief valve for opening and closing the relief port on the primary side of the pump device It is a water leak detector provided in said relief opening of decompression type backflow prevention device provided, and the 1st electrode provided in said relief opening located in the radial direction outside rather than the inner skin of said relief opening and An insulation packing provided on the first electrode, and a second electrode provided on the insulation packing and positioned radially outward of the inner circumferential surface of the relief port .

  According to the present invention, it is possible to provide an intensified water supply device and a water leak detector capable of detecting water leak with a simple and compact configuration.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which partially abbreviate | omits and shows the structure of the pressure increase water supply apparatus which concerns on one Embodiment of this invention. Sectional drawing which shows the structure of the decompression type backflow prevention apparatus and leakage detection apparatus which are used for the same pressure increase water supply apparatus. Explanatory drawing which shows typically the structure of the control panel used for the same pressure increase water supply apparatus. Sectional drawing which shows the structure of the decompression type backflow prevention apparatus and leakage detector which are used for the pressure increase water supply apparatus which concerns on other embodiment of this invention.

Hereinafter, a pressure-boosting water supply device 1 having a water leak detector 18 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is a front view partially showing the configuration of a pressure increasing water supply device 1 according to an embodiment of the present invention, and FIG. 2 is a pressure reducing type backflow prevention device 12 and a water leak detector 18 used in the pressure increasing water supply device 1. FIG. 3 is an explanatory view schematically showing the configuration of the control panel 22 used in the pressure-boosting water supply device 1. As shown in FIG.

  As shown in FIG. 1, the pressure-increasing water supply device 1 is provided on the suction pipe 11, the decompression type backflow prevention device 12 provided on the secondary side of the suction pipe 11, and the secondary side of the decompression type backflow prevention device 12. A plurality of pump devices 14 provided on the secondary side of the branch pipe 13, discharge pipes 15 provided in the plurality of pump devices 14, and a plurality of A junction pipe 16 for joining the discharge pipes 15, a pressure accumulator 17 provided in the junction pipe 16, a water leak detector 18 provided in the decompression type backflow prevention device 12, and a first pressure detection provided in the suction pipe 11. , A flow meter 20 provided in each of the discharge pipes 15, a second pressure detector 21 provided in the junction pipe 16, and a control panel 22.

  The intensified water supply device 1 further includes a base 24, a support plate 25 provided on the base 24, and a cover 26 covering the support plate 25. Each component described above is fixed on the base 24 and the front surface of the support plate 25, and the intensified water supply device 1 is configured by covering the front side of the support plate 25 and each component on the base 24 with the cover 26. .

  The suction pipe 11 is connected to a water pipe or the like on the primary side of the intensified water supply device 1.

  As shown in FIG. 2, the decompression type backflow prevention device 12 includes a first check valve 31, a second check valve 32 provided on the secondary side of the first check valve 31, and a first check valve. While accommodating 31 and the 2nd nonreturn valve 32, the shell 33 which constitutes middle room 33a, and the relief valve 34 arranged at middle room 33a are provided.

  The first check valve 31 is provided on the primary side of the outer shell 33. The second check valve 32 is provided on the secondary side of the outer shell 33. The first check valve 31 and the second check valve 32 prevent backflow of fluid from the secondary side of itself.

  The outer shell 33 is formed in a cylindrical shape. The outer shell 33 is made of a conductive material and a metal material. The outer shell 33 has an intermediate chamber 33a configured between the first check valve 31 and the second check valve 32 at the center, and an escape port 33b opened and closed by the relief valve 34 that connects the intermediate chamber 33a and the outside. Have. The outer shell 33 is connected to the suction pipe 11 and the branch pipe 13.

  The relief valve 34 opens and closes the relief port 33b. The relief valve 34 always closes the relief port 33b, and when the first check valve 31 or the second check valve 32 leaks, and the reverse siphon phenomenon due to the negative pressure on the primary side. In the case such as occurs, the relief port 33b is opened.

  The branch pipe 13 is connected to the secondary side of the shell 33. The branch pipe 13 constitutes a flow path on the secondary side of the shell 33, and branches the flow path into a plurality of, in the present embodiment, two.

  The pump device 14 includes a motor 14a and a pump 14b. The motor 14 a is electrically connected to the control panel 22. The pump 14b is driven by a motor 14a. The pump 14 b is a single stage or multistage pump. The pump 14 b is connected to the branch pipe 13 at the primary side.

  The discharge pipe 15 is connected to the secondary side of the pump 14b. The merging pipe 16 merges the discharge pipes 15 connected to the respective pumps 14 b. The junction pipe 16 is connected with a pipe connected to a water supply destination such as a faucet of a building or a shower head. The pressure accumulation device 17 is an accumulator provided to the merging pipe 16.

  The water leak detector 18 includes a first insulating packing 41, a first electrode 42, a second insulating packing 43, a second electrode 44, and a fastening member 45. In the water leakage detector 18, the first insulating packing 41, the first electrode 42, the second insulating packing 43 and the second electrode 44 are sequentially stacked from the end face of the escape port 33 b, and the fastening member 45 integrally forms the end face of the escape port 33 b It is fixed to In the leak detector 18, the first electrode 42 and the second electrode 44 are electrically connected to the control panel 22. Further, the water leak detector 18 includes an electrode voltage application circuit 52, which will be described later, provided on the control panel 22, a storage unit 53, and a control unit 54.

  The first insulating packing 41 is made of an insulating material and has an annular shape. One main surface of the first insulating packing 41 abuts on the end face of the escape opening 33b. The inner diameter of the first insulating packing 41 is configured to be the same diameter as the inner diameter of the relief port 33b. The first insulating packing 41 is made of an elastically deformable resin material, for example, a rubber material.

  The first electrode 42 includes a first electrode plate 42 a and a first wiring 42 b connected to the first electrode plate 42 a. The first electrode plate 42a is formed in an annular shape. The inner diameter of the first electrode plate 42 a is larger than the inner diameter of the first insulating packing 41. The outer diameter of the first electrode plate 42 a is equal to or larger than the outer diameter of the first insulating packing 41. In addition, the first electrode plate 42a protrudes in the radial direction, and has a protruding seat portion 42c for attaching the first wiring 42b on a part of the outer peripheral surface. One main surface of the first electrode plate 42 a abuts on the main surface of the first insulating packing 41.

  One end of the first wiring 42 b is fixed to the seat 42 c of the first electrode plate 42 a by a fastening member 42 d such as a screw, and the other end is connected to the control panel 22. For example, a round or Y-shaped crimp terminal is provided at one end of the first wiring 42 b.

  The second insulating packing 43 is made of an insulating material and has an annular shape. One main surface of the second insulating packing 43 abuts on the other main surface of the first electrode 42. The inner diameter of the second insulating packing is the same diameter as the inner diameter of the first insulating packing 41, and is smaller than the inner diameter of the first electrode plate 42a. The second insulating packing 43 is made of an elastically deformable resin material, such as a rubber material.

  The second electrode 44 includes a second electrode plate 44 a and a second wire 44 b connected to the second electrode plate 44 a. The second electrode plate 44a is formed in an annular shape. The inner diameter of the second electrode plate 44 a is larger than the inner diameter of the first insulating packing 41 and the inner diameter of the second insulating packing 43. The inner diameter of the second electrode plate 44a is the same as the inner diameter of the first electrode plate 42a.

  The outer diameter of the second electrode plate 44 a is equal to or larger than the outer diameter of the second insulating packing 43. In addition, the second electrode plate 44a has a protruding seat portion 44c that protrudes in the radial direction and to which the second wiring 44b is attached, at a part of the outer peripheral surface. One main surface of the second electrode plate 44 a abuts on the main surface of the second insulating packing 43.

  One end of the second wire 44 b is fixed to the seat 44 c of the second electrode plate 44 a by a fastening member 44 d such as a screw, and the other end is connected to the control panel 22. For example, a round or Y-shaped crimp terminal is provided at one end of the second wiring 44 b.

  The fastening member 45 is made of a non-conductive material, for example, a resin material. The fastening member 45 is inserted into the first insulating packing 41, the first electrode plate 42a, the second insulating packing 43, and the second electrode plate 44a, and is fastened to the escape port 33b of the outer shell 33. The first electrode plate 42a, the second insulating packing 43, and the second electrode plate 44a are fixed to the escape port 33b.

  The first pressure detector 19 detects the pressure on the primary side of the decompression type backflow prevention device 12. The first pressure detector 19 is electrically connected to the control board 22 via a signal line or the like, converts the detected pressure into a signal, and transmits the signal to the control board 22.

  The flow meter 20 is, for example, an impeller type flow meter. The flow meter 20 detects the flow rate on the secondary side of the pump 14b. The flow meter 20 is electrically connected to the control board 22 via a signal line or the like, converts the detected flow rate into a signal, and transmits the signal to the control board 22.

  The second pressure detector 21 detects the pressure of the junction pipe 16. The second pressure detector 21 is electrically connected to the control board 22 via a signal line or the like, converts the detected pressure into a signal, and transmits the signal to the control board 22.

  As shown in FIG. 3, the control panel 22 includes a display unit 50, an inverter 51, an electrode voltage application circuit 52, a storage unit 53, and a control unit 54. The control panel 22 has a case 55 fixed to the support plate 25 that accommodates the inverter 51, the electrode voltage application circuit 52, the storage unit 53, and the electrical components constituting the control unit 54. In addition, the control panel 22 may have a notification unit that notifies information to the outside by sound.

  The display unit 50 is a display, an LED or the like capable of displaying the driving condition of the pump device 14, the presence or absence of abnormality of the pressure increasing water supply device 1, the presence or absence of water leakage from the escape port 33b, and the like. The display unit 50 is electrically connected to the control unit 54 via the signal line 99. The display unit 50 is a notification means for notifying the outside that there is water leakage from the escape port 33b. In addition, when it has an alerting | reporting part, the said alerting | reporting part becomes an alerting | reporting means to alert | report outside that there is leaked water from an escape opening outside with sound.

  Inverter 51 is electrically connected to motor 14 a and control unit 54 via signal line 99. In the present embodiment, for example, two inverters 51 having the same number as that of the motor 14a are provided. The inverter 51 varies the number of rotations of the motor 14a.

  The electrode voltage application circuit 52 is electrically connected to the first electrode plate 42 a (first wire 42 b), the second electrode plate 44 a (second wire 44 b), and the control unit 54. The electrode voltage application circuit 52 includes a reference resistor 52a, a diode bridge 52b, and a diode 52c for over voltage protection. The electrode voltage application circuit 52 applies an AC voltage, for example, AC 12 V supplied by the control unit 54, between the first electrode plate 42a and the second electrode plate 44a.

  The storage unit 53 stores a first threshold and a second threshold to be compared with the resistance value between the first electrode plate 42 a and the second electrode plate 44 a. The first threshold is a resistance value, and is set to, for example, 30 kΩ. The second threshold is a resistance value larger than the first threshold, and is set to, for example, 70 kΩ.

  The control unit 54 controls the inverter 51 based on the pressure and flow rate detected by the first pressure detector 19, the flow meter 20 and the second pressure detector 21 so that the discharge pressure becomes constant or the estimated terminal pressure becomes constant. , Control the pump device 14.

  The control unit 54 supplies an alternating voltage to the electrode voltage application circuit 52, and detects the resistance between the first electrode plate 42a and the second electrode plate 44a. The control unit 54 compares the resistance value between the detected first electrode plate 42 a and the detected second electrode plate 44 a with the first threshold value. When the resistance value is equal to or less than the first threshold (30 kΩ), in other words, when the AD input voltage of the control unit 54 becomes 2.2 V or less, the control unit 54 controls the first electrode plate 42a and the It is determined that the current is supplied between the two electrode plates 44a, in other words, the relief valve 34 is opened, and water leakage is generated. If the control unit 54 determines that water leakage is occurring, the control unit 54 transmits information on the occurrence of an abnormality to the display unit 50, and causes the display unit 50 to display the abnormality. In addition to the display unit 50, when the notification unit is provided, the control unit 54 warns of an abnormality by sound.

  In addition, the control unit 54 continues to supply an alternating voltage to the electrode voltage application circuit 52 even after determining that water leakage has occurred, and detects the resistance between the first electrode plate 42a and the second electrode plate 44a. Do. The control unit 54 compares the resistance value between the detected first electrode plate 42 a and the detected second electrode plate 44 a with the second threshold value. When the resistance value is equal to or higher than the second threshold (70 kΩ), in other words, when the AD input voltage of the control unit 54 becomes 4.4 V or more, the water leakage is stopped, that is, normal. I will judge. The control unit 54 transmits normal information to the display unit 50 as normal recovery, and cancels the display of the abnormality of the display unit 50.

  The pressure increasing water supply device 1 having the water leakage detector 18 configured as described above, the inner diameter of the first electrode plate 42 a and the inner diameter of the second electrode plate 44 a, the inner diameter of the first insulating packing 41 and the second insulating packing 43. The diameter is larger than the inner diameter. With this configuration, even when condensation occurs, the water leakage detector 18 stays between the first electrode plate 42a and the second electrode plate 44a by the condensation water, and the first electrode plate 42a and the second electrode plate It can prevent conducting 44a.

  That is, the space between the first electrode plate 42a and the second electrode plate 44a is interrupted by the second insulating packing 43, and the inner circumferential surfaces of the first electrode plate 42a and the second electrode plate 44a are radially separated from each other. It is located outside the inner circumferential surface of 43. With this configuration, for example, even if dew condensation water is generated in the groove formed by the first insulating packing 41, the first electrode plate 42a, and the second insulating packing 43, the groove and the second electrode plate 44a are the second insulating It will be interrupted by the packing 43. The same applies to water that has leaked and that is attached to the first electrode plate 42a.

  Thus, the water leakage detector 18 can prevent malfunction when condensation occurs, and the first electrode plate 42 a and the second electrode plate 42 a after the water leakage occurs and when the water leakage stops thereafter. Conduction between the electrode plates 44a can be prevented. In addition, since water leakage flows along the 1st insulation packing 41, the 1st electrode board 42a, the 2nd insulation packing 43, and the 2nd electrode board 44a, the fall of the water leakage detector sensitivity of the water leakage detector 18 arises. There is no

  Further, the first electrode plate 42 a and the second electrode plate 44 a of the water leak detector 18 are mutually insulated by the first insulating packing 41 and the second insulating packing 43 and fixed by the fastening member 45 made of a resin material. Therefore, it may be a thin plate configuration. Since the leak detector 18 can shorten its axial length, it can reduce the space required for installation in the intensified water supply device 1. In other words, the leak detector 18 can be small in size, can be installed in a narrow area, and has a high degree of freedom with respect to placement.

  Moreover, while providing the two electrode plates 42a and 44a by interposing the 2nd insulating packing 43, the inner surface (inner peripheral surface) of the two electrode plates 42a is disposed outward from the second insulating packing 43. Configuration is acceptable. For this reason, the water leak detector 18 can be manufactured inexpensively.

  Further, unlike normal water level detection in a water receiving tank, the electrode for detecting water leakage is not conductive at the normal time, and is not conductive for a long time even if it is conductive. For this reason, there is no fear of corrosion of the electrode due to electrolysis even if a direct current voltage is applied between the electrodes. Therefore, the electrode voltage application circuit 52 may be configured to apply a DC voltage to the electrodes 42 and 44. Further, in the case of applying a DC voltage to the electrodes 42 and 44, for example, a pulsed DC voltage may be applied every 5 ms for every 100 ms. By pulsing the direct current voltage applied to the electrodes 42 and 44, the electrolysis of the electrodes 42 and 44 can be prevented as much as possible even when condensation or the like occurs.

  As described above, according to the pressure-boosting water supply device 1 having the water leak detector 18 according to the embodiment of the present invention, it is possible to have a simple, compact configuration at low cost.

  Next, a water leak detector 18A used in the depressurization type backflow prevention device 12 of the pressure increase water supply device 1 according to another embodiment of the present invention will be described with reference to FIG. FIG. 4 is a partially omitted cross-sectional view showing the configuration of the depressurization type backflow prevention device 12 and the leaked water detector 18A of the pressure increasing water supply device 1 according to another embodiment of the present invention. In the water leak detector 18A of the present embodiment, the same components as those of the water leak detector 18 of the above-described embodiment are denoted by the same reference numerals, and the detailed description thereof will be omitted.

  The water leak detector 18A includes a first electrode 42A, an insulating packing 43A, and a fastening member 45. The water leak detector 18A is configured by providing the insulating packing 43A and the first electrode 42A from the end face of the escape port 33b. The water leak detector 18A also includes an electrode voltage application circuit 52 of the control board 22, a storage unit 53, and a control unit 54.

  The first electrode 42A includes a first electrode plate 42Aa and a first wiring 42b connected to the first electrode plate 42Aa. The first electrode plate 42Aa is in the form of a small piece, and is disposed outward of the inner circumferential surface of the insulating packing 43A. For example, the first electrode plate 42Aa is configured of a round or Y-shaped crimp terminal provided at an end of the first wiring 42b. The first electrode plate 42Aa is disposed on the outer peripheral edge side of the end face of the relief port 33b, and the tip thereof is disposed more outward than the inner peripheral edge of the relief port 33b.

  The fastening member 45 is made of a non-conductive material, for example, a resin material. The fastening member 45 is inserted into the first electrode plate 42Aa and the insulating packing 43A, is fastened to the relief port 33b of the outer shell 33, and fixes the first electrode plate 42Aa and the insulating packing 43A to the relief port 33b.

The second electrode plate 44a and the shell 33 are insulated in the water leak detector 18A having such a configuration. Further, water leakage detector 18A includes a shell body 33 at the time of leakage, and a second electrode plate 44a disposed via an insulating packing 43 A conductive. Therefore, water leakage detector 18A is an effect similar to that of the leak detector 18 described above, in the configuration of the single insulating packing 43 A, the second electrode plate 44a of the annular provided relief port 33b Thus, the configuration can be simpler and smaller. Moreover, since the 1st electrode board 42Aa can use the terminal which distribute | circulates, the water leak detector 18A can be manufactured more cheaply.

  In addition, since the outer surface of the release port 33b of the shell 33 serves as the electrode surface, the surface area can be increased, so that the sensitivity can be improved by increasing the surface area of the first electrode plate 42Aa. Become.

The present invention is not limited to the above embodiment, and can be variously modified in the implementation stage without departing from the scope of the invention. In addition, the embodiments may be implemented in combination as appropriate, in which case the combined effect is obtained. Furthermore, various inventions are included in the above-described embodiment, and various inventions can be extracted by a combination selected from a plurality of disclosed configuration requirements. For example, even if some configuration requirements are deleted from all the configuration requirements shown in the embodiment, the problem can be solved, and if an effect is obtained, a configuration from which this configuration requirement is removed can be extracted as the invention.
In the following, a description equivalent to the invention described in the claims at the beginning of the present application will be appended.
[1] pump device,
An outer shell, a first check valve provided in the outer shell, a second check valve provided in the outer shell and provided on the secondary side of the first check valve, the first of the outer shell A pressure reducing type backflow prevention device provided on the primary side of the pump device, having a relief port provided between a check valve and the second check valve, and a relief valve for opening and closing the relief port;
A first electrode provided on the relief port, which is located outward in the radial direction of the relief port, an insulating packing provided on the first electrode, and the insulating packing, which are provided outward in the radial direction A leak detector having a second electrode located on the
Water supply system with pressure.
[2] The water leak detector further includes a fastening member made of a nonconductive material,
The pressurizing water supply device according to [1], wherein the first electrode, the insulating packing, and the second electrode are fixed to the outer shell by the fastening member.
[3] The insulating packing includes an annular first insulating packing provided in the relief port, and an annular second insulating packing provided between the first electrode and the second electrode,
The first electrode and the second electrode are formed in an annular shape, and an electrode plate whose inner circumferential surface is located radially outward in relation to the inner circumferential surfaces of the first insulating packing and the second insulating packing is used. The intensifier water supply apparatus as described in [1] which each has.
[4] The first electrode is an annular first connected by a first wiring connected to a voltage application circuit that applies a pulsed DC voltage, and a crimp terminal provided at one end of the first wiring. And an electrode plate,
The second electrode includes a second wire connected to the voltage application circuit, and an annular second electrode plate connected by a crimp terminal provided at one end of the second wire [1]. The pressurized water supply device according to.
[5] The leak detector is
A voltage application circuit for applying a pulsed DC voltage to the first electrode and the second electrode;
A first threshold that is a resistance between the first electrode and the second electrode when the first electrode and the second electrode are conductive, and a second threshold that is a resistance higher than the first threshold. A storage unit to store;
The relief valve opens, and reporting means for reporting to the outside that there is water leakage from the relief port; Resistance value between the first electrode and the second electrode when a voltage is applied by the voltage application circuit And a control unit that determines that the escape opening is open when the measured resistance value is less than or equal to the first threshold value, and determines that water leakage has stopped when the resistance value is greater than or equal to the second threshold value; The pressurized water supply apparatus according to [1], further comprising
[6] Outer shell, first check valve provided in the outer shell, second check valve provided in the outer shell and provided on the secondary side of the first check valve, of the outer shell The pressure reducing type backflow prevention device provided on the primary side of a pump device, having a relief port provided between the first check valve and the second check valve, and a relief valve for opening and closing the relief port. A leak detector provided at the escape port,
A first electrode provided on the relief port, which is located radially outward of the relief port;
An insulation packing provided on the first electrode;
A second electrode provided on the insulating packing and positioned radially outward;
Leak detector with water.
[7] further comprising a fastening member made of a non-conductive material,
The water leak detector according to [6], wherein the first electrode, the insulating packing, and the second electrode are fixed to the outer shell by the fastening member.
[8] The insulating packing has a circular first insulating packing provided in the relief port, and a circular second insulating packing provided between the first electrode and the second electrode,
The first electrode and the second electrode are formed in an annular shape, and an electrode plate whose inner circumferential surface is located radially outward in relation to the inner circumferential surfaces of the first insulating packing and the second insulating packing is used. The water leak detector as described in [6] which each has.
[9] The first electrode is a ring-shaped first connected by a first wiring connected to a voltage application circuit that applies a pulsed DC voltage, and a crimp terminal provided at one end of the first wiring. And an electrode plate,
The second electrode includes a second wire connected to the voltage application circuit, and an annular second electrode plate connected by a crimp terminal provided at one end of the second wire [6]. Water leak detector as described in.
[10] A voltage application circuit for applying a voltage to the first electrode and the second electrode,
A first threshold that is a resistance between the first electrode and the second electrode when the first electrode and the second electrode are conductive, and a second threshold that is a resistance higher than the first threshold. A storage unit to store;
The relief valve opens, and reporting means for reporting to the outside that there is water leakage from the relief port; Resistance between the first electrode and the second electrode when the voltage is applied by the voltage application circuit A control unit that measures a value and determines that the escape opening is open when the measured resistance value is less than or equal to the first threshold, and determines that water leakage has stopped when it is greater than or equal to the second threshold When,
The water leak detector according to [6], further comprising:

DESCRIPTION OF SYMBOLS 1 ... Pressure increase water supply apparatus, 11 ... Suction pipe, 12 ... Decompression type backflow prevention apparatus, 13 ... Branch pipe, 14 ... Pump apparatus, 14a ... Motor, 14b ... Pump, 15 ... Discharge pipe, 16 ... Merge pipe, 17 ... Accumulator, 18: Water leak detector, 19: first pressure detector, 20: flow meter, 21: second pressure detector, 22: control panel, 24: base, 25: support plate, 26: cover, 31: First check valve, 32: second check valve, 33: outer shell, 33a: intermediate chamber, 33b: relief port, 34: relief valve, 41: first insulation packing (insulation packing), 42: first electrode , 42a ... first electrode plate, 42b ... first wiring, 42c ... seat, 42d ... fastening member, 43 ... second insulating packing (insulating packing), 44 ... second electrode, 4 4a ... second electrode plate, 44b ... 2nd wiring, 44c ... seat part 44d ... fastening member, 45 ... fastening member, DESCRIPTION OF SYMBOLS 50 ... Display part, 51 ... Inverter, 52 ... Electrode voltage application circuit, 52a ... Reference resistance, 52b ... Diode bridge, 52c ... Diode, 53 ... Storage part, 54 ... Control part, 55 ... Case, 99 ... Signal line.

Claims (8)

A pump device,
An outer shell, a first check valve provided in the outer shell, a second check valve provided in the outer shell and provided on the secondary side of the first check valve, the first of the outer shell A pressure reducing type backflow prevention device provided on the primary side of the pump device, having a relief port provided between a check valve and the second check valve, and a relief valve for opening and closing the relief port;
Located outside in the radial direction than the inner peripheral surface of the escape opening, the first electrode provided on the relief port, the insulating packing provided on the first electrode, and provided on the insulating packing, the A water leakage detector having a second electrode located radially outward of the inner circumferential surface of the escape port ;
Equipped with
The insulating packing includes an annular first insulating packing provided in the escape port, and an annular second insulating packing provided between the first electrode and the second electrode,
The first electrode and the second electrode are formed in an annular shape, and an electrode plate whose inner circumferential surface is located radially outward in relation to the inner circumferential surfaces of the first insulating packing and the second insulating packing is used. increase that Yusuke each intermediate-pressure feed water system. The water leak detector further includes a fastening member made of a non-conductive material,
The pressurized water supply apparatus according to claim 1, wherein the first electrode, the insulating packing, and the second electrode are fixed to the outer shell by the fastening member. The first electrode is a first wiring connected to a voltage application circuit that applies a pulsed DC voltage, and an annular first electrode plate connected by a crimp terminal provided at one end of the first wiring. , And
The second electrode includes a second wire connected to the voltage application circuit, and an annular second electrode plate connected by a crimp terminal provided at one end of the second wire. The pressurized water supply device according to. The water leakage detector is
A voltage application circuit for applying a pulsed DC voltage to the first electrode and the second electrode;
A first threshold that is a resistance between the first electrode and the second electrode when the first electrode and the second electrode are conductive, and a second threshold that is a resistance higher than the first threshold. A storage unit to store;
The relief valve opens, and reporting means for reporting to the outside that there is water leakage from the relief port; Resistance value between the first electrode and the second electrode when a voltage is applied by the voltage application circuit And a control unit that determines that the escape opening is open when the measured resistance value is less than or equal to the first threshold value, and determines that water leakage has stopped when the resistance value is greater than or equal to the second threshold value; The pressurized water supply apparatus according to claim 1, further comprising An outer shell, a first check valve provided in the outer shell, a second check valve provided in the outer shell and provided on the secondary side of the first check valve, the first of the outer shell A relief port provided between the check valve and the second check valve, and a relief port of a decompression type backflow prevention device provided on the primary side of a pump device having a relief valve for opening and closing the relief port. It is a leak detector provided,
A first electrode provided in the relief port, which is located radially outward of the inner circumferential surface of the relief port;
An insulation packing provided on the first electrode;
A second electrode provided on the insulating packing and positioned radially outward of the inner circumferential surface of the relief port ;
Equipped with
The insulating packing includes an annular first insulating packing provided in the escape port, and an annular second insulating packing provided between the first electrode and the second electrode,
The first electrode and the second electrode are formed in an annular shape, and an electrode plate whose inner circumferential surface is located radially outward in relation to the inner circumferential surfaces of the first insulating packing and the second insulating packing is used. water leak detector that Yusuke, respectively. It further comprises a fastening member made of a non-conductive material,
The water leak detector according to claim 5 , wherein the first electrode, the insulating packing and the second electrode are fixed to the outer shell by the fastening member. The first electrode is a first wiring connected to a voltage application circuit that applies a pulsed DC voltage, and an annular first electrode plate connected by a crimp terminal provided at one end of the first wiring. , And
The second electrode includes a second wiring connected to the voltage applying circuit, and a second electrode plate annular connected by crimp terminal provided at one end of the second wiring, claim 5 Water leak detector as described in. A voltage application circuit that applies a voltage to the first electrode and the second electrode;
A first threshold that is a resistance between the first electrode and the second electrode when the first electrode and the second electrode are conductive, and a second threshold that is a resistance higher than the first threshold. A storage unit to store;
The relief valve opens, and reporting means for reporting to the outside that there is water leakage from the relief port; Resistance between the first electrode and the second electrode when the voltage is applied by the voltage application circuit A control unit that measures a value and determines that the escape opening is open when the measured resistance value is less than or equal to the first threshold, and determines that water leakage has stopped when it is greater than or equal to the second threshold When,
The water leak detector according to claim 5 , further comprising: