JP2011214602A - Flowing water detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flowing water detecting device which facilitates work of machining opening inside equipment.SOLUTION: A valve body 52 is formed with a vertically open internal flow path and a lateral opening 68 for machining, and a valve seat fitting hole 72, which faces upward at an angle, is formed by machining using a machining tool 100 passed at an angle from above through the opening 68 for machining to fit and fix the valve seat therein. A valve element is rotatably supported in the valve body 52, held in a closed position, which faces upward at an angle, while sitting on the valve seat in normal times and is rotated by a primary-side pressure to open when water flows. The opening 68 for machining is closed using a detachable door member.

Description

The present invention relates to a flowing water detection device that detects flowing water in a pipe.

  For example, in a fire extinguishing facility that radiates foam fire extinguishing agents using a conventional water flow detector, a mixer is inserted in the middle of the pipe, and the fire fighting water is mixed with the fire extinguishing agent that is the foam stock solution and connected via a simultaneous release valve. Spray foam with an open head. The simultaneous release valve is opened by the operation of the thermal head provided in the sensing pipe. A running water detection device is provided in the middle of the piping for the open head.

  Normally, since the primary and secondary sides are in the same pressure state, the flowing water detection device places the valve body in the closed position by its own weight. When the simultaneous opening valve is opened by the operation of the thermal head that has received a thermal airflow due to a fire, the valve body is opened by the primary side pressure due to the pressure drop on the secondary side due to the release of bubbles from the open type head. . The opening of the valve element is detected by the flowing water detector, and a flowing water detection signal is output after a predetermined delay time from the opening of the valve element.

  A running water detection signal from the running water detection device is sent to the control panel, and the operation of the head is displayed. Also, the pressure stop of the water supply main pipe accompanying the foam discharge from the head is detected, the fire extinguishing pump is activated, the water for fire extinguishing is supplied under pressure, and the fire extinguishing chemical (foam concentrate) supplied from the chemical tank is mixed and opened. Supply to the head to discharge fire extinguishing bubbles continuously. In addition to foam fire extinguishing equipment that discharges foam fire extinguishing equipment, various running fire detection equipment such as sprinkler fire extinguishing equipment that emits water, and other devices that detect running water in pipes are often used.

In such a running water detection device, it is necessary to periodically perform an inspection to confirm that the running water detection device operates normally. For example, in the case of foam extinguishing equipment, open the manual start valve provided at the end of the sensing pipe of the simultaneous opening valve and open the simultaneous opening valve in the same way as when the thermal head was opened due to a fire, so that the foam extinguishing liquid is put into the piping. The actual flow is inspected to check that the water flow detector operates normally. When the running water detection device does not work properly, the inside of the running water detection device is visually inspected. In this case, after draining the fire extinguisher in the secondary pipe of the water flow detector, open the inspection window provided in the main body of the water detector and remove the dust around the valve body and valve seat, Clean. Depending on the situation, the running water detection device may be removed from the piping to clean the inside of the device.

JP 2009-072642 A

  However, in such a conventional water flow detection device, there is a communication hole in the partition wall in the main body between the primary side inlet and the secondary side outlet, and the valve seat provided in the communication hole Although it has a valve body that can be opened and closed, the valve body has a larger diameter than the inflow port and the outflow port, and the valve body part that houses the valve body is generally formed larger than the inflow port and the outflow port. . And when manufacturing the valve body, it is necessary to insert a boring tool from a narrow inlet and outlet and to process a large internal space of the valve body, such as processing the valve body and valve seat mounting holes. The work was complicated.

  In addition, when performing inspections such as cleaning the inside of the running water detection device, open the inspection window and put your hands inside to perform cleaning and inspection, but the inside of the device is very narrow and the valve body can be moved from the inspection window. Even if it is difficult to rotate and open the valve body and check the surroundings of the valve body and the valve seat, it is difficult to see the surroundings of the valve body and the valve seat. There is a problem that the side member is hidden and the inspection work becomes complicated.

  An object of this invention is to provide the flowing water detection apparatus which makes easy the process operation of the opening part inside an apparatus.

Another object of the present invention is to provide a flowing water detection device that can easily and easily check the inside of the device.

The present invention provides a flowing water detection device that is connected to a pipe and includes a rotatable valve body inside the valve body, and detects flowing water in the pipe and outputs a flowing water detection signal.
A valve body that forms an internal flow path that opens up and down, and a processing opening formed on the side;
A detachable door member for closing the processing opening;
An obliquely upward valve seat mounting hole formed by a processing tool disposed obliquely from above through the processing opening;
A valve seat fitted and fixed in the valve seat mounting hole and arranged obliquely upward;
A valve body that is instructed to freely rotate in the valve body, is seated on the valve seat, and is held in an obliquely upward closed position;
It is provided with.

  Here, the inclination angle of the valve seat mounting hole formed obliquely upward is set so that the machining axis passing through the center of the valve seat mounting hole passes through the machining opening.

  Further, the processing opening is used as an inspection port by removing and opening the door member at the time of inspection.

Further, the valve body is rotated from the processing opening that is opened by removing the door member at the time of inspection, and can be exposed to the outside of the valve body.

  According to the present invention, the valve body is formed with an internal flow path that opens upward and downward, and a processing opening is formed on the side, and the processing tool such as a boring machine disposed obliquely from above through the processing opening is inclined upward. The valve seat mounting hole is machined and the valve seat and valve body are arranged obliquely upward with respect to the internal flow path above and below the valve body, making it easy to insert the boring machine into the device. In addition, since the machining opening can be widely opened without being affected by the stipulations of the inlet and outlet diameters, the machining operation inside the running water detection device using a tool can be easily performed.

  Further, if the valve seat and the valve body can be arranged obliquely in this way, the door member is removed at the time of inspection, the processing opening is used as an inspection opening, and the interior is illuminated obliquely from the inspection opening. The closed state of the valve body can be easily confirmed. Further, since the valve body is disposed obliquely, an operation of directly opening and closing the valve body by putting a hand through the inspection port can be facilitated, and the operation can be confirmed by directly opening and closing the valve body.

  In addition, if the valve body is rotated so that it can be taken out from the inspection port, the valve body can be more easily inspected, and if foreign matter such as dust adheres to the valve body and the valve seat in the valve body. Can be removed by cleaning.

Furthermore, when the valve body is opened, the running water detection unit operates and a running water detection signal is output after a predetermined delay time, so that the operation of the running water detection switch and the situation around the running water detection switch can be easily visually confirmed.

Explanatory drawing which showed the fire-fighting installation in which the flowing water detection apparatus of this invention was installed Explanatory drawing which showed the embodiment of the flowing water detection apparatus by this invention about the front Sectional drawing which showed the internal structure in embodiment of FIG. Sectional drawing which showed processing of the valve seat mounting hole inside the valve body in the embodiment of FIG. Sectional drawing which showed the plane cross section of the valve body in embodiment of FIG. Explanatory drawing which showed the side in embodiment of FIG. 2 with the detail of the flowing water detection part.

  FIG. 1 is an explanatory view showing a foam fire-extinguishing facility provided with a flowing water detection device of the present invention. In FIG. 1, a fire pump 10 is installed in a pump room such as a basement floor of a building and is driven by a motor 12. The motor 12 is started and stopped by the pump control panel 14. The fire-extinguishing pump 10 is driven by a motor 12, sucks fire-extinguishing water from a water source tank 15, and supplies pressurized fire-extinguishing water to a water supply main 16 disposed in the height direction of the building.

  An expiratory water tank 17 is provided for the fire pump 10. A pressure tank 18 is provided to start the fire pump 10. The pressure tank 18 is connected to the water supply main pipe 16 and introduces pressurized fire-extinguishing water in the pipe to compress the air inside. A pressure switch 19 is provided in the pressure tank 18, and the pressure switch 19 detects that the pressure inside the water supply main pipe 16 has dropped below a specified pressure, and outputs a pressure drop detection signal to the pump control panel 14, thereby The motor 12 is driven to start the fire pump 10.

  The water supply main pipe 16 is provided with a mixer 20. A water film fire extinguisher, for example, is supplied as a foam fire extinguisher from the chemical tank 22 and mixed with the mixer 20. In this embodiment, the chemical tank 22 is an open tank, and the stock solution of the water film fire extinguisher filled in the tank is sent out by the chemical pump 24 and supplied to the mixer 20. The The drug pump 24 is driven by a motor 25, and a pump control panel 26 is provided for the motor 25.

  Further, in this embodiment, pressure sensors 45 and 46 are provided on the primary side and the secondary side of the mixer 20, and the pressure sensor 48 and the control valve 50 are provided in the extinguishing agent supply pipe from the drug pump 24. Is provided. The pressure detection signals of the pressure sensors 45, 46, and 48 are input to the control panel 44, and the control panel 44 is controlled so that the ratio between the differential pressure in the mixer 20 and the extinguishing agent supply pressure from the pressure sensor 48 is a constant ratio. The valve 50 is controlled to open and close, thereby controlling the concentration of the extinguishing agent aqueous solution supplied from the mixer 20 at a predetermined constant concentration.

  A branch pipe 28 is drawn from the water supply main pipe 16 on the secondary side of the mixer 20 to a fire extinguishing target section, for example, a parking lot of a building. The flowing water detection device 30 of the present invention is provided at a branch portion of the branch pipe 28. When the flow detection device 30 flows in the branch pipe 28 due to water spraying from the head, the flow detection device 30 outputs a flow detection signal to the control panel 42 by this flow.

  A plurality of open-type heads 32 are installed in the branch pipe 28 on the secondary side of the flowing water detection device 30 via the simultaneous open valve 34. A closed type thermal head 38 is connected to the sensing pipe drawn from the simultaneous opening valve 34, and the end of the sensing pipe is connected to the drain pipe via the manual activation valve 40.

  The simultaneous opening valve 34 normally receives the pressure water from the branch pipe 28 on the primary side and closes the flow path to the secondary side to which the open type head 32 is connected. When the valve 38 is activated, the valve is opened, and the pressure water from the branch pipe 28 is supplied to the open side head 32 on the secondary side to spray the fire-extinguishing water.

  Next, the operation of the foam fire extinguishing equipment of FIG. 1 will be described. In the foam fire-extinguishing equipment of FIG. 1, the fire-extinguishing pump 10 is operated in a state where the supply of the fire-extinguishing agent is stopped by closing the control valve 50 at the start of the use of the equipment, For this reason, during monitoring, only the water for fire extinguishing is filled in the branch pipe 28 on the secondary side of the flowing water detector 30.

  Assuming that the thermal head 38 is actuated by a fire and the simultaneous release valve 34 is opened, the water pressure in the water supply main pipe 16 drops below a specified pressure due to water spraying from the open type head 32, and the fire extinguishing pump 10 and the chemical pump 24 are turned on. The fire extinguishing agent aqueous solution in which the fire extinguishing agent is mixed with the pressurized fire extinguishing water so as to have a constant concentration is supplied by the mixer 20 and sprayed from the open type head 32.

  Here, the fire pump 10 is activated by detecting that the pressure inside the water supply main pipe 16 has dropped below a specified pressure by the pressure switch 19 of the pressure tank 18 and outputting a pressure drop detection signal to the pump control panel 14. 12 is activated. When the fire pump 10 is activated by the pump control panel 14, this activation signal is transmitted to the control panel 44 via the control panel 42, and the control panel 44 drives the motor 25 by the pump control panel 26 to operate the medicine pump 24. The fire extinguishing agent is pressurized and supplied to the mixer 20 from the open type chemical tank 22.

  The control panel 44 feedback-controls the opening degree of the control valve 50 so that the ratio of the differential pressure between the primary side and the secondary side in the water supply main pipe 16 of the mixer 20 and the pressure of the extinguishing agent supply pipe becomes a constant ratio. The chemical concentration of the aqueous fire extinguisher solution supplied from the mixer 20 is accurately controlled to a specified concentration.

  When water is sprayed from the open type head 32, the water flow detection device 30 provided in the branch pipe 28 is operated by opening the valve body provided inside by the water flow, and a water flow detection signal is transmitted to the control panel 42. The alarm is displayed on the control panel 42 or the disaster prevention reception panel. The flowing water detection device 30 can check the state and operation of the valve by an inspection structure provided in the device itself as will be described later.

  When the manual start valve 40 provided at the end of the sensing pipe is opened, the simultaneous release valve 34 is opened and water is sprayed from the open type head 32 as in the case where the thermal head 38 is operated.

  Further, when the pressure inside the water supply main pipe 16 drops below a specified pressure through the branch pipe 28, the fire control pump 10 and the chemical pump 24 are activated by the pump control panel 14 and the control panel 44, and the fire extinguishing supplied from the mixer 20 is performed. The agent aqueous solution is sprinkled from the open head 38.

  FIG. 2 is an explanatory view showing an embodiment of the flowing water detection device according to the present invention. In FIG. 2, the flowing water detection device 30 of this embodiment has a valve body 52, and a primary flange 54 is integrally formed at the lower end in the installed state, and a secondary flange 56 is integrally formed on the upper side. is doing. A processing opening is opened on the left side of the valve body 52 as will be clarified later, and the door member 70 is normally fixed by a bolt 74 and closed. Further, on the front side of the valve body 52, the shaft end of the rotary shaft 64 of the valve body incorporated therein is positioned, and a secondary drain valve 82 is further provided.

  FIG. 3 is a cross-sectional view showing the internal structure of FIG. In FIG. 3, a valve seat mounting hole 72 is machined and formed obliquely upward above the inflow side flow passage 54 a that opens in the primary flange 54 on the lower side of the valve body 52. The ring 66 is fitted and fixed. A valve body 60 is arranged to be openable and closable with respect to the valve seat ring 66. Thus, the valve seat mounting hole 72 is processed and formed obliquely upward, whereby the valve seat ring 66 and the valve body 60 are disposed obliquely upward in the closed state.

  The valve body 60 is rotatably supported in the valve body 52 by passing the rotating shaft 64 through the left arm portion 65, and a rubber valve body sheet 62 is mounted on the lower side thereof. And is closed at a closed position where the valve seat 62 is attached to the illustrated valve seat ring 66.

  Further, a flowing water detection receiving portion 86 is extended to the right end of the valve body 60, and the tip of a stem 88 extended from the flowing water detection portion, which will be clarified later, is locked. Further, a gripping member 78 used for opening the machining opening 68 and rotating the valve body 60 to the outside is raised on the upper part of the valve body 60.

  A processing opening 68 is formed on the left side of the valve body 52, and the door member 70 is fixed by a bolt 74 through a packing 76 and closed. The machining opening 68 is formed to insert a machining tool of a boring machine into the valve seat mounting hole 72 obliquely from above and machine it.

  Further, the machining opening 68 is used as an inspection port for inspecting the internal valve structure after the processing of the valve seat mounting hole 72 is completed and the assembly is completed and is installed in the foam fire extinguishing equipment as shown in FIG. Used.

  When using the processing opening 68 as an inspection port, the door member 70 is removed, the processing inspection port 68 is opened, the closed state of the internal valve body 60 is confirmed, and the valve body 52 is further disposed. The valve body 60 is rotated about the rotating shaft 64 beyond the open position, and as shown by the valve body 60a, the valve body 60 can be taken out from the processing opening 70 and inspected.

  The gripping member 78 provided on the upper portion of the valve body 60 is configured so that the gripping member 78 hits the door member 70 when the valve body 60 is rotated to the processing opening 68 side by running water during a fire or the like. The valve body 60 is prevented from rotating too much, and when flowing water stops, the valve body 60 is surely returned to the valve seat ring 66 side. Without the gripping member 78, the valve body 60 rotates to the left side of the rotating shaft 64, so that it cannot return to the valve seat side by its own weight. In order to prevent this, even if the valve body 60 is rotated, the gripping member 78 does not rotate to the left side of the rotating shaft 64 when the gripping member 78 hits the inspection door 70. You can sit back on the ring 66.

  FIG. 4 is a cross-sectional view showing the processing of the valve seat mounting hole by taking out the valve body of FIG. In FIG. 4, a machining opening 68 opened to the side of the valve body 52 is used for machining a valve mounting hole 72 formed in a portion that partitions the internal flow path.

  The machining of the valve mounting hole 72 is performed by inserting and positioning the machining tool 100 from the direction indicated by the machining axis 102 passing through the center of the machining hole with the valve body 52 fixed on the bed of the boring machine. By rotating, the valve seat mounting hole 72 is formed by boring.

  Here, if the inclination angle with respect to the horizontal direction of the valve seat mounting hole 72 is θ, the machining inclination angle with respect to the horizontal direction of the machining axis 102 on which the machining tool 100 is set is (90 ° −θ).

The inclined arrangement of the valve body 60 in the present embodiment is to make it possible to easily confirm the state of the valve body 60 by illuminating the inside when the processing opening 68 is opened. At the same time, the inclination angle θ of the valve body 60 determined by the arrangement of the valve seat ring 66 is set such that the closed state can be sufficiently secured by the dead weight of the valve body 60. When the weight W of the valve body 60 is here, the pressing force F that presses the valve body 60 against the valve seat 66 is:
F = W cos θ (1)
Therefore, the inclination angle θ is determined in consideration of this relationship.

  That is, when the predetermined pressing force F necessary for securing the closed state is determined by the dead weight of the valve body 60, the weight W of the valve body 60 can be determined so that the predetermined value F is obtained with respect to the change in the inclination angle θ. It ’s fine.

  When the inclination angle θ is set, it is necessary to set the opening position of the machining opening 68 so that the machining axis 102 passing through the center of the machining hole passes through the machining opening 68. By setting the machining axis 102 so as to pass through the machining opening 68, the rotation axis of the machining machine to be machined by rotation is positioned at the machining opening 68, and the machining part at the tip of the tool is positioned in the valve body. The valve seat mounting hole 72 with an angle θ can be machined from the outside.

  FIG. 5 is a cross-sectional view showing a portion of the valve body of FIG. 2 as a plane cross section. In FIG. 5, a processing opening 68 is formed by projecting a side portion of the valve body 52 outward, and is closed by a door member 70. The valve body 60 is accommodated in the valve body 52 in a closed position due to its own weight, and is disposed obliquely upward toward the processing opening 68 side. The rotary shaft 64 penetrates an arm portion 65 that supports the valve body 60 from the valve body 52 side and rotatably supports the arm portion 65.

  The secondary side drain valve 82 is taken out in the right direction of the secondary side partitioned by the valve body 60 of the valve body 52, and the secondary side drainage can be performed by removing the bolt attached to the tip.

  A flowing water detector 84 is provided on the left side of the valve body 52 corresponding to the valve body 60, and the tip of a stem 88 extending into the valve body 52 from the flowing water detector 84 is provided integrally with the valve body 60. The stem 88 is locked in the closed position of the valve body 60 shown in the figure under the receiving portion 86.

  FIG. 6 is an explanatory view showing the door member side of FIG. 2, and also shows the details of the flowing water detection unit 84 in cross section. The flowing water detector 84 is provided with a stem 88 that is pivotally supported by a shaft pin 90. The stem 88 extends into the valve body 52, and the tip of the flowing water is integrally formed with the valve body 60 as shown in FIG. The detection receiving portion 86 is locked.

  The stem 88 is biased counterclockwise around the shaft pin 90 by a spring 98. The distal end of a plunger 96 provided in the timer unit 92 is in contact with the stem 88. When the stem 88 is unlocked by opening the valve body 60, the timer unit 92 is pushed up by the rotation of the stem 88 by the force of the spring 98, and the plunger 96 moves using an orifice such as oil or air. The limit switch 94 is turned on after a predetermined delay time, and the running water detection signal is output to the outside.

  Next, inspection of the flowing water detection device 30 will be described. At the time of checking the flowing water detection device 30, the bolt 74 of the door member 70 shown in FIG. When the machining opening 68 is opened, the valve body 60 is in a closed position in the valve body 52 so as to be obliquely upward. By illuminating from the opened machining opening 68 and viewing the internal state, the valve body 60 The closed state can be easily checked visually.

  Subsequently, the holding member 78 protruding above the valve body 60 is held, and the valve body 60 is rotated around the rotation shaft 64 in the opening direction, and is further rotated so as to be taken out from the processing opening 68. Thus, if the valve body 60 in the closed position can be rotated so as to be taken out beyond the processing opening 68, it can be confirmed that the valve body 60 can be normally opened and closed. Since the valve body 60 itself is exposed to the outside of the valve body 52, it can be easily visually confirmed outside, and the state of the valve body sheet 62 and the like can be visually confirmed and parts can be easily replaced. Further, since the valve body 60 is taken out from the inspection port 68 as shown in the figure, the internal parts inside the valve body are reduced and the inside can be easily checked. Although it was difficult to see the periphery of the valve seat ring because it was hidden behind, it was difficult to clean, but in the configuration of the present invention, it was confirmed that there was no foreign matter such as dust around the valve body and the valve seat ring. Once cleaned, it can be easily removed.

  Also, whether or not foreign matter such as dust adheres to the valve seat ring 66 in the valve body 52 and the valve body sheet 62 of the valve body 60 with the valve body 60 taken out from the machining opening 68 as shown in the figure. Check and clean off any foreign objects.

  Further, when the valve body 60 is rotated in the opening direction from the closed position, the stem 88 is unlocked by the flowing water detection receiving portion 86 formed integrally with the valve body 60, and the stem 88 becomes free. The limit switch 94 is turned on after a predetermined delay time by the timer 92 shown in FIG. 5 to output a running water detection signal, and the operation of the running water detection switch can be confirmed. Since the valve body goes out of the valve body, the movement of the stem 88 and the like can be easily grasped, and it is easy to repair at the time of failure.

  When the valve body 60 is rotated until it is exposed to the outside of the valve body 52, the valve body 60 itself can be detached from the valve body 52 by removing the rotating shaft 64, and the valve body can be easily replaced. Can be done.

  In addition, in this embodiment, although it is a case where it applies to the flowing water detection apparatus of foam fire extinguishing equipment, it is applicable not only to this but to the flowing water detection apparatus of sprinkler fire extinguishing equipment etc. which do not mix foam.

  Further, the structure of the flowing water detection switch or the like is not limited to the above-described configuration, and may be one that detects the rotation of the valve shaft, or a pressure switch that operates with the pressure water pressure introduced when the valve body is opened. The used running water detection switch may be used.

  In addition, when using a machining tool with a machining part with a larger outer diameter than the shaft diameter attached to the tip of the rod-shaped shaft part, the rod-shaped shaft part has an insertion angle (90 ° -θ) and a machining opening. 68, and the line parallel to the machining axis 102 extending from the outer peripheral portion of the valve seat mounting hole 72 is not necessarily located in the machining opening 68.

  If only the ease of processing of the flowing water detection device is to be solved, it is only necessary to set the angle so that the central axis of the valve seat mounting hole 72 is located in the processing opening 68, and the valve body 60 is not necessarily provided. It is not necessary to have an opening that can be exposed to the outside from the processing opening 68.

The present invention is not limited to the above-described embodiments, includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above-described embodiments.

30: Flowing water detection device 52: Valve body 60: Valve body 64: Rotating shaft 66: Valve seat ring 68: Opening for processing 70: Door member 78: Holding member 100: Processing tool

Claims (4)

In the flowing water detection device that is connected to the piping and has a rotatable valve body inside the valve body, detects the flowing water in the piping and outputs a flowing water detection signal.
A valve body that forms an internal flow path that opens up and down and that has a processing opening in the side surface direction;
A door member that freely opens and closes the processing opening;
An obliquely upward valve seat mounting hole formed by a processing tool disposed obliquely from above through the processing opening;
A valve seat fitted and fixed in the valve seat mounting hole and arranged obliquely upward;
A valve body seated on the valve seat so as to be rotatable in the valve body and held in an obliquely upward closed position;
A running water detection device characterized by comprising:
2. The flowing water detection device according to claim 1, wherein an inclination angle of the valve seat mounting hole formed obliquely upward is set such that a machining axis passing through the center of the valve seat mounting hole passes through the machining opening. A flowing water detection device characterized by:
The flowing water detection device according to claim 1, wherein the processing opening is used as an inspection port by removing and opening the door member during inspection.
  4. The flowing water detection device according to claim 3, wherein the valve body can be rotated and exposed to the outside of the valve body from the processing opening that is opened by removing the door member during inspection. apparatus.

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