JP2011200360A - Flowing water-detecting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flowing water-detecting apparatus capable of checking the inside of the apparatus simply and easily.SOLUTION: A flowing water-detecting apparatus 30 includes a check hole 68 in a valve body 52, and it is closed with a detachable check door. The check hole 68 is opened by taking the check door off during checking. The valve 60 is mounted obliquely and upward, and the condition of the valve 60 can be confirmed well when the inside is seen with illumination. The valve 60 in the valve body 52 is further rotated over the opening position by having the holding member 78 of the valve 60, so it is taken out of the check hole 68 and exposed, and it confirms the movement of the valve 60, the adhesion of dust on the valve 60 and the valve seat ring 66, and the operation of the flowing water-detecting unit by opening the valve 60.

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-A-7-265454

  However, in such a conventional water flow detection device, when performing inspection such as cleaning inside the water flow detection device, the inspection window is opened and a hand is put inside to perform cleaning and inspection. It is very narrow and it is difficult to move the valve body from the inspection window. Even if you try to check the surroundings of the valve body and the valve seat by opening the valve body, it is difficult to see the periphery of the valve body and the valve seat. Depending on the structure, there is a problem that the back side is hidden from the opened valve body and the inspection work becomes complicated.

An object of this invention is to provide the flowing water detection apparatus which can perform the inspection inside the apparatus easily and easily.

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.
An inspection port that opens to the side of the valve body that houses the valve body and rotates the valve body to expose it to the outside of the valve body;
An inspection door that can be attached to the inspection port to open and close the inspection port;
It is provided with.

Here, the valve body and the valve seat are disposed obliquely upward. In addition, the valve body is provided with a gripping member that rotates and extracts the valve body from the inspection port.

  According to the present invention, an inspection port that opens to the side of the valve body that houses the valve body and is exposed to the outside of the valve body by rotating the valve body is provided, and is closed by an inspection door that can be opened and closed. Therefore, during inspection, remove the inspection door, open the inspection port, rotate the valve body in the valve body in the opening direction, expose it to the outside through the inspection port, and check the movement of the valve body. Since there is no valve body inside the valve body, the inside of the body is easy to see, the valve body itself can be confirmed outside the body, the status of the valve seat inside other valve bodies can be easily confirmed, and foreign matter such as dust If it adheres, the work such as cleaning and removal becomes easy.

Further, when the valve body is opened, the running water detection unit operates to output a running water detection signal after a predetermined delay time, and 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 embodiment of the flowing water detection apparatus by this invention Sectional drawing which showed the internal structure in 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. Sectional drawing which showed the inspection in embodiment of FIG. Sectional drawing which showed other embodiment of the flowing water detection apparatus in this embodiment. Sectional drawing which showed the inspection in embodiment of FIG.

  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 pressurized fire-extinguishing water from the branch pipe 28 is supplied to the secondary open-type head 32 to spray the pressurized 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 use of the equipment, and pressurized fire-fighting water is supplied to the water supply main pipe 16 and the branch pipe 28. For this reason, during monitoring, only the pressurized fire-extinguishing water is filled in the secondary branch pipe 28 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. An inspection port is opened on the left side of the valve body 52 as will be clarified later, and the inspection door 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 ring 66 is disposed obliquely upward in an inflow side flow passage opened in the primary flange 54 that is the lower side of the valve body 52. A valve body 60 is arranged to be openable and closable with respect to the valve seat ring 66.

  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 is erected on the upper part of the valve body 60 to be used when the inspection port 68 is opened and the valve body 60 is rotated and taken out.

  An inspection port 68 is formed on the left side of the valve body 52, and the inspection door 70 is fixed by a bolt 74 through a packing 76 and closed. When the valve body 60 arranged in the valve body 52 is rotated about the rotation shaft 64 beyond the open position, that is, when the valve body 60 is rotated counterclockwise, the inspection body 68 is inspected. The opening is formed so as to be rotatable until it can be exposed to the outside.

  Further, on the lower left side of the valve body 52, a primary side pressure port 80 communicating with a primary side internal flow passage partitioned by the valve body 60 is formed, and a primary side pressure gauge is connected thereto. A secondary side pressure port (not shown) is formed in the secondary side internal flow passage partitioned by the valve body 60 of the valve body 52, and a secondary side pressure gauge is connected thereto. Further, since the valve seat ring 66 and the valve body 60 are disposed obliquely, the drainage connected to the drainage pipe on the primary side of the valve seat ring 66 and the body portion on the right side of the valve body 52 where the valve seat ring is raised. A valve may be provided to allow drainage on the primary side.

Here, the inclined arrangement of the valve body 60 is to make it possible to easily confirm the state of the valve body 60 by illuminating the inside when the inspection port 68 is opened. The inclination angle θ of the valve body 60 determined by the arrangement of the valve seat ring 66 is an angle at which a closed state can be sufficiently secured by the 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.

  The inclination angle θ is preferably about θ = 30 degrees, for example. If a predetermined pressing force F can be ensured at this time, the inclination angle θ below that value may determine only the inclination angle θ without changing the weight W of the valve body 60.

  On the other hand, when the inclination angle θ is 30 degrees or more, the valve body weight W that secures the predetermined pressing force F is determined from the equation (1) for the inclination angle θ exceeding 30 degrees. However, when the inclination angle θ increases, the weight W of the valve body 60 increases and the size of the valve body 60 increases, so it is desirable that the upper limit of the inclination angle be about θ = 60 degrees, for example.

  Note that the gripping member 78 provided on the upper part of the valve body 60 is configured such that the gripping member 78 hits the inspection door 70 when the valve body 60 is rotated toward the inspection port 68 by running water in the event of a fire or the like. The body 60 does not rotate 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 a portion of the valve body of FIG. 2 as a plane cross section. In FIG. 4, an inspection port 68 is formed by projecting a side portion of the valve body 52 outward, and is closed by an inspection door 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 inspection port 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 drainage 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 drainage on the secondary side can be performed by removing the bolt 82 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. 5 is an explanatory view showing the inspection door side of FIG. 2, and also shows the details of the flowing water detector 84 in a 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.

  FIG. 6 is a cross-sectional view showing inspection of the flowing water detection device shown in FIGS. At the time of inspection of the flowing water detection device 30, the bolt 74 of the inspection door 70 shown in FIG. 3 is removed and the inspection port 68 is opened. When the inspection port 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 inspection port 68 and checking the internal state, the valve body 60 is closed. Can be easily inspected 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 further rotated so as to be taken out from the inspection port 68. Thus, if the valve body 60 in the closed position can be rotated so as to be taken out beyond the inspection port 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 of the valve body can be easily checked. Although it was difficult to see and clean the periphery of the valve seat ring, it was confirmed that there was no foreign matter such as dust around the valve body and the valve seat ring in the configuration of the present invention. You can also do it easily.

  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 60 goes out of the valve body 52, the movement of the stem 88 and the like can be easily grasped, and repair at the time of failure can be easily performed.

  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.

  FIG. 7 is a cross-sectional view showing another embodiment of the flowing water detection apparatus according to the present invention. This embodiment is characterized in that a valve body is horizontally arranged in a valve body.

  In FIG. 7, an inspection port 68 is formed by projecting the side portion of the valve body 52 outward, and the inspection port 68 is normally closed by an inspection door 70. The valve body 60 is accommodated in the valve body 52 in a closed position due to its own weight, and in the present embodiment, the valve body 62 is disposed in a horizontal direction orthogonal to the flowing water direction from the bottom to the top. The valve body 60 is rotatably supported between a closed position and an open position by passing a rotation shaft 64 penetrating from the valve body 52 side through the arm portion 65. Other configurations are the same as those of the embodiment shown in FIGS.

  FIG. 8 is a cross-sectional view showing the inspection of the flowing water detection device shown in FIG. 7. When checking the flowing water detection device 30, the bolt 74 of the inspection door 70 shown in FIG. Holding the holding member 78 protruding above the body 60, the valve body 60 is rotated in the opening direction around the rotation shaft 64 and further rotated so as to be taken out from the inspection port 68.

  As a result, it can be confirmed that the valve body 60 can be normally opened and closed, and 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 taken out to the outside is confirmed. If foreign matter is attached, clean and remove. 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, and the limit switch 94 is activated after a predetermined delay time by the timer 92 shown in FIG. Turns on and outputs a running water detection signal, confirms the operation of the running water detection switch, displays head operation based on the running water detection signal, and checks the fire pump activation.

  In this embodiment, the present invention is applied to a water flow detection device for foam fire extinguishing equipment. However, the present invention is not limited thereto, and a device for detecting water flow by connecting to a pipe such as a water flow detection device such as a sprinkler fire extinguishing equipment that does not mix foam Can be applied to.

  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.

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: Inspection port 70: Inspection door 78: Holding member 84: Flowing water detection unit 92: Timer 94: Limit switch

Claims (3)

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.
An inspection port that opens to the side of the valve body that houses the valve body and rotates the valve body to be exposed to the outside of the valve body;
An inspection door that is attached to the inspection port so that the inspection port can be freely opened and closed;
A running water detection device characterized by comprising:
The water flow detection device for a fire extinguishing facility according to claim 1, wherein the valve body and the valve seat are disposed obliquely upward.
  The water flow detection device for fire extinguishing equipment according to claim 1, wherein a gripping member is provided on the valve body to rotate and take out the valve body from the inspection port. .

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