JP2014104004A - Automatic valve device - Google Patents

Abstract

[PROBLEMS] To sufficiently drain residual water in a drive control system of an automatic valve when water discharge from a water spray head is stopped, and to prevent damage to equipment due to the residual water.
An automatic valve device that supplies pressurized water to a water spray head installed in a tunnel and discharges the water is provided with an automatic valve drive unit having a piston / cylinder mechanism in addition to an automatic valve and a test water control valve, and a pilot. An automatic valve drive control system including a valve 20, a manual start valve 22, a pressure adjustment valve 24, and an automatic drain valve 26 is provided. An intake mechanism 32 is provided in the automatic valve drive control system, and when the water discharge by the automatic valve 12 is stopped, the intake mechanism 32 is opened to suck in the atmosphere, and the pilot valve 20, manual start valve 22, pressure in the automatic valve drive control system It facilitates drainage from the automatic drain valve 26 of pressurized water filled in the regulating valve 24 and the cylinder chamber 46a of the automatic valve drive unit 14 and the like.
[Selection] Figure 3

Description

The present invention relates to an automatic valve device that sprays water by applying pressure to a water spray nozzle installed in a tunnel or the like under pressure.

  Conventionally, an emergency facility has been installed in a tunnel for an automobile exclusive road in order to protect a person and a vehicle from a fire accident occurring in the tunnel. Such emergency equipment includes a fire detector and emergency telephone for fire monitoring and reporting, and sprays water from a fire hydrant device and a water spray head for tunnel protection to extinguish the fire and prevent fire spread. An automatic valve device is provided.

  Like the fire hydrant device, the automatic valve device is installed at intervals of 50 meters, and one automatic valve device has a function of spraying water from a plurality of water spray heads arranged at intervals of 5 meters.

  The automatic valve device connects a fire extinguishing pipe to the primary side of the automatic valve to supply pressurized water, and connects the secondary side of the automatic valve to a water spray head disposed in the tunnel via a water control valve for testing. Yes. The automatic valve is opened and closed by a drive unit equipped with a piston / cylinder mechanism. As a drive control system for the automatic valve, a pilot valve and a manual start valve are connected in parallel, followed by a stop valve for supplying primary-side pressurized water, and then connected to a drive part of the automatic valve via a pressure adjustment valve. Yes.

  During operation, the stop valve is released and the pilot valve and the manual start valve are closed, so that the automatic valve is closed by shutting off the supply of pressurized water to the automatic valve drive unit. In the event of a fire, the pilot valve is remotely controlled to open, and the automatic valve is opened by supplying the primary-side pressurized water to the automatic valve drive unit via the pressure regulating valve, and the pressurized water is supplied to the water spray head and discharged. During the water discharge of the water spray head, the secondary side water discharge pressure is controlled to a predetermined set pressure by the pressure control of the pressure adjusting valve. When the fire is extinguished, when the pilot valve is remotely controlled to be closed, the supply of pressurized water to the automatic valve driving unit is stopped, the automatic valve is closed, and water discharge from the water spray head is stopped.

The emergency facilities in the tunnel are regularly inspected once every six months or once a year. Among them, the inspection of the automatic valve device is carried out by the inspector going into the tunnel and closing the test water control valve provided on the secondary side of the automatic valve by operating the handle, and switching from the secondary side of the automatic valve to the drainage system. In this state, for example, a manual start valve is opened to open an automatic valve, and a test spray is discharged to the drainage system without actually discharging water from the water spray head to confirm the operation performance. When the inspection is completed, the manual start valve is closed to close the automatic valve, and the automatic control valve on the secondary side of the closed automatic valve is reopened to return to the steady state.

JP 2002-120898 A JP 2012-040064 A

  By the way, in a tunnel automatic valve device, when a fire or a test water discharge, the automatic valve is opened to discharge pressurized water from the water spray head, and then the automatic valve is closed to stop the water discharge. Stays and becomes residual water. Therefore, an automatic drain valve is provided to discharge residual water in the automatic valve drive control system. The automatic drain valve is automatically opened when the pressure of the pressurized water in the automatic valve drive control system is reduced due to the stoppage of water discharge, and the residual water remaining in the automatic valve drive system can be discharged.

  However, when the automatic drain valve opens due to the pressure drop of the pressurized water, the automatic drain valve opens because there is no air inlet except for air flowing in from the secondary side of the automatic drain valve connected to the drain side. However, the remaining water in the automatic valve drive control system could not be sufficiently drained, and there was a risk of damage to the equipment due to corrosion or freezing due to the remaining water.

  In addition, an exhaust valve is provided on the secondary side of the water stop valve provided in the automatic valve drive control system, and the exhaust valve is used for venting the air between the water stop valve, the pilot valve and the manual start valve during construction. For this reason, when the automatic valve is closed and the water discharge is stopped, if the water stop valve is closed and the exhaust valve is opened, and further the manual start valve is opened, air is sucked from the exhaust valve and the remaining water in the automatic valve drive control system Can be sufficiently drained from the automatic drain valve. However, since the water stop valve is opened and the pilot valve and the automatic start valve are closed during normal operation, the exhaust valve cannot be used as an intake port. In order to inhale, it is necessary to close the water stop valve and open the manual start valve.After draining, the water must be returned to the original state. It is impossible to put it into practical use.

It is an object of the present invention to provide an automatic valve device that can sufficiently drain residual water in an automatic valve drive control system that accompanies stoppage of water discharge from a water spray head to prevent equipment damage due to residual water. And

(Automatic valve device)
The present invention
By opening the valve body provided inside the main body by an automatic valve drive unit equipped with a piston / cylinder mechanism, the pressurized water supplied from the primary side is supplied to the water spray nozzle on the secondary side to discharge the water, and the automatic valve is driven. An automatic valve that stops water discharge from the water spray nozzle by closing the valve body by the part,
A test water control valve which is arranged on the secondary side of the automatic valve, is opened in a steady state and is closed in a test water discharge;
A pilot valve that is opened when water spraying or test water discharge is performed, and that supplies the primary valve side pressurized water of the automatic valve to the automatic valve drive unit as the opening pressure of the valve body;
A manual start valve connected in parallel to the pilot valve and opened by manual operation to supply the primary pressure side pressurized water of the automatic valve to the automatic valve drive as the opening pressure of the valve body;
Adjusting the pressure of the primary side pressurized water supplied by opening the pilot valve or the manual start valve is supplied to the automatic valve drive unit, and the pressure of the secondary side pressurized water is controlled to a predetermined discharge pressure by driving the valve element. A pressure regulating valve to
Open when the pilot or manual start valve is closed and the pressure of the secondary pressurized water drops below the specified drainage release pressure due to the stoppage of the automatic valve. The pilot valve, manual start valve, pressure adjustment valve and automatic valve are opened. An automatic drain valve for draining pressurized water filled in an automatic valve drive control system including a drive unit;
In an automatic valve device equipped with
An air intake mechanism that sucks in air when water discharge by the automatic valve is stopped and promotes drainage from the automatic drain valve of pressurized water filled in the automatic valve drive control system is provided.

(The intake port is placed at a high position.)
The intake mechanism is provided at a predetermined position that is higher than the installation positions of the automatic valve, the pressure adjusting valve, the pilot valve, and the manual start valve.

(Pilot valve side intake mechanism)
An intake mechanism is provided in the secondary piping portion of the pilot valve and the manual start valve.

(Intake mechanism of automatic valve drive)
An intake mechanism is provided in the drive part of the automatic valve.

(Pilot valve side and automatic valve drive intake mechanism)
An intake mechanism is provided in each of the secondary side piping part and the automatic valve driving part of the pilot valve and the manual start valve.

(Details of intake mechanism of automatic valve drive)
Automatic valve drive
A piston connected to the valve body;
A cylinder slidably provided with a piston;
A spring that biases the piston in the closing direction of the valve body;
A pressurized water input / output port that causes the piston to stroke in the valve opening direction by supplying pressurized water to one cylinder chamber partitioned by the piston, and causes the piston to stroke in the valve closing direction by draining pressurized water;
With
The intake mechanism is provided in an intake port that communicates with one of the cylinder chambers.

(Details of intake mechanism)
The intake mechanism is a cap structure that opens and closes the intake port by attaching and detaching the cap member, an intake valve that opens and closes the intake port by opening and closing operation, or when the pressure of the filled pressurized water drops below the drainage release pressure of the automatic drain valve An automatic intake valve that opens to open the intake port.

(Basic effect)
According to the present invention, an intake mechanism is provided in an automatic valve drive control system including an automatic valve drive unit including a piston / cylinder mechanism of an automatic valve, a pilot valve, a manual start valve, and a pressure adjustment valve, and the automatic valve is closed to discharge water. When the pressure of the pressurized water in the automatic valve drive control system falls below the predetermined drainage release pressure and the automatic drain valve opens, the automatic valve drive control system Since the drainage from the automatic drain valve of pressurized water filled inside is facilitated, air is sucked into the automatic valve drive control system on the primary side of the automatic drain valve from the intake mechanism, and the automatic valve drive unit (Cylinder chamber), pressure control valve, pilot valve and manual start valve can be drained from the open automatic drain valve sufficiently, automatic valve drive part included in the automatic valve drive control system, pressure control valve , Pilot valve, manual start valve, pressure gauge The damage caused by freezing or corrosion of the residual water in various devices, such as pitch makes it possible to prevent.

(Effect when the intake port is placed at a high position)
In addition, since the intake mechanism is provided at a predetermined position that is higher than the installation positions of the automatic valve, the pressure adjustment valve, the pilot valve, and the manual start valve, the automatic valve drive unit and the pressure adjustment valve that are filled with pressurized water Automatic release of residual water staying at a position lower than the intake mechanism by sucking air from a position higher than the staying position of the pressurized water filling the equipment such as pilot valve and manual start valve The drainage valve can be drained sufficiently in a short time.

(Effect when the pilot valve side intake mechanism is arranged)
Further, by providing an intake mechanism in the secondary piping portion of the pilot valve and the manual start valve, residual water in the path from the secondary side of the pilot valve and the manual start valve to the automatic drain valve via the pressure adjustment valve Can be drained sufficiently.

(Effect when the intake mechanism is arranged in the automatic valve drive)
Also, by providing the intake mechanism in the automatic valve drive unit, the remaining water in the path from the automatic valve drive unit (cylinder chamber) through the pressure adjustment valve to the automatic drain valve can be sufficiently drained.

(Effect when the intake mechanism is arranged on the pilot valve side and the automatic valve drive)
Further, by providing the intake mechanism in each of the secondary side piping section branch of the pilot valve and the manual start valve and the drive section of the automatic valve, the secondary side of the pilot valve and the manual start valve passes through the pressure adjustment valve. It is possible to sufficiently drain the remaining water on the path leading to the automatic drain valve and the remaining water on the path leading to the automatic drain valve from the driving part (cylinder chamber) of the automatic valve via the pressure regulating valve.

(Effects of intake mechanism structure)
The intake mechanism can be realized easily and at low cost by adopting a cap structure that opens and closes the intake port by attaching and detaching the cap member.

  Further, the intake mechanism is an intake valve that opens and closes the intake port by an opening / closing operation, so that the structure is simple and the operation can be facilitated.

Furthermore, when the pressure of the filled pressurized water drops below the drain opening pressure of the automatic drain valve, the intake mechanism is an automatic intake valve that opens and opens the intake port. The remaining water can be sufficiently drained by automatically inhaling outside air.

External appearance explanatory view showing a first embodiment of an automatic valve device according to the present invention Explanatory drawing which showed embodiment of the automatic valve drive control system in the automatic valve apparatus of FIG. 1 is an explanatory diagram showing an embodiment of an automatic valve drive control system in the automatic valve device of FIG. 1 using equipment symbols. Explanatory drawing which showed embodiment of the intake mechanism by a cap structure Explanatory drawing which showed embodiment of the intake mechanism by an intake valve Explanatory drawing which showed embodiment of the intake mechanism by an automatic intake valve Explanatory drawing which showed 2nd Embodiment of the automatic valve apparatus of this invention Explanatory drawing which showed the automatic valve apparatus of FIG. 7 using the apparatus symbol. Explanatory drawing which showed 3rd Embodiment of the automatic valve apparatus by this invention which provided the suction mechanism in two places.

[Outline of automatic valve device]
FIG. 1 is an external explanatory view showing an embodiment of an automatic valve device according to the present invention. As shown in FIG. 1, the automatic valve device 10 includes an automatic valve 12, a test water control valve 16, a water stop valve 18, a pilot valve 20, a manual start valve 22, a pressure adjustment valve 24, an automatic drain valve 26, a manual drain valve. The valve 28 and the pressure switch 30 are included, and in addition to this, the intake mechanism 32 is newly provided in the present invention.

  By providing the intake mechanism 32, when the automatic valve 12 is closed and the water discharge is stopped, the pressure of the pressurized water in the automatic valve drive control system drops below a predetermined drainage release pressure and the automatic drain valve 26 opens. In addition, air is sucked from the intake mechanism 32 to facilitate drainage from the automatic drain valve 26 of pressurized water filled in the automatic valve drive control system. An exhaust valve 31 is provided on the secondary side of the water stop valve 18.

[Configuration of automatic valve device]
2 is an explanatory view showing a first embodiment of the automatic valve device of FIG. 1, and FIG. 3 is an explanatory view showing an automatic valve drive control system in the automatic valve device of FIG. 2 using device symbols.

(Configuration of automatic valve)
As shown in FIGS. 2 and 3, the automatic valve 12 includes a valve body 34 and an automatic valve drive unit 14. The valve body 34 includes a primary side inlet 36 to which pressurized water is supplied from a water supply pipe (not shown) and a secondary side outlet 38 that connects the water spray head side through the test water control valve 16. The valve seat 40 is formed in the valve hole of the internal partition wall that partitions the two.

  The automatic valve drive unit 14 slidably houses a piston 44 in a cylinder 46, attaches a valve body 42 to a tip portion extending from the piston 44 into the valve body 34, and attaches the valve body 42 to the valve seat 40. Supports opening and closing freely. A stem 48 is connected to the valve body 42 in the axial direction. The stem 48 is taken out from the upper part of the cylinder 46 to guide the stroke of the piston 44. The valve body 42 is attached to the inside of the piston 44 in the closing direction. A spring 50 is provided.

  An input / output port 52 is connected to one cylinder chamber 46a partitioned by the piston 44, and by supplying pressurized water from this to the cylinder chamber, the piston 44 is stroked upward in the figure against the spring 50. The valve body 44 is moved away from the valve seat 40 to open the automatic valve 12, and the pressurized water is discharged from the input / output port 52, so that the piston 44 is stroked downward in the drawing by the spring 50 to bring the valve body 44 into contact with the valve seat 40. The automatic valve 12 is closed.

(Configuration of automatic valve drive control system)
The automatic valve drive control system for opening and closing the automatic valve 12 includes a water stop valve 18, a pilot valve 20, a manual activation valve 22, a pressure adjustment valve 24, an automatic drain valve 26 and a manual drain valve 28. The water stop valve 18 is opened in a steady monitoring state during operation. The pilot valve 20 is controlled to be closed in a steady monitoring state, and is remotely controlled to open when water spray or test water discharge is performed, and the pressurized water on the primary pressure side of the valve body 34 is supplied to the automatic valve drive unit 14 as an open pressure. Then, when the automatic valve 12 is opened and the water discharge is stopped, if the remote control is remotely performed, the supply of the pressurized water to the automatic valve driving unit 14 is stopped and the automatic valve 12 is closed.

  The manual start valve 22 is connected in parallel with the pilot valve 20 and is manually opened at the time of test discharge, etc., and the pressurized water on the primary pressure side is supplied as an open pressure to the automatic valve drive unit 14 to open the automatic valve 12 for testing. When the closing operation is performed at the end of water discharge, the supply of pressurized water to the automatic valve driving unit 14 is stopped and the automatic valve 12 is closed.

(Configuration of pressure regulating valve)
The pressure adjustment valve 24 supplies an adjustment pressure obtained by adjusting the pressure of the primary pressurized water supplied by opening the pilot valve 20 or the manual start valve 22 to the automatic valve drive unit 14, and the secondary pressure by driving the valve body 42 to open and close. The pressure of the side pressurized water is controlled to the specified discharge pressure.

  The details of the pressure regulating valve 24 have two switching positions divided into upper and lower parts as shown in FIG. 3 represented by symbols. These switching positions are the spring load of the pressure setting spring 54 provided on the lower side and the upper side. The pilot port PL is switched according to the balance of force applied by the secondary pressure.

  A second valve body 58 is provided in the pressure regulating valve 24. The second valve body 58 communicates with the primary pressure port P1, the cylinder port CL, and the secondary pressure port P2 by the water pressure of the pilot port PL. The amount is controlled, and in an initial state, it is in a state of being slightly disconnected and almost disconnected, and the amount of communication increases as the pressure of the pilot port PL increases.

  In an initial state in which primary pressurized water is applied to the primary pressure port P1 by opening control of the pilot valve 20, the pressure regulating valve 24 is in the lower switching position in the figure, and the primary pressure port P1 communicates with the cylinder port CL. Then, pressurized water is supplied to the cylinder chamber 46a of the automatic valve drive unit 14 to open the automatic valve 12.

  When the secondary pressure applied to the pilot port PL is lower than the specified discharge pressure determined by the pressure setting spring 54 due to the opening drive of the automatic valve 12, it is in the lower switching position in the figure and the primary pressure port P1 is the cylinder port CL. The secondary pressure port P2 is in a state where it is throttled and communicated with the primary pressure port P1 and the cylinder port CL by the second valve body 58.

  When the secondary pressure applied to the pilot port PL becomes higher than the specified water discharge pressure determined by the pressure setting spring 54, the pressure regulating valve 24 is switched to the upper switching position. In this upper switching position, the primary pressure port P1 is disconnected from the cylinder port CL, and the cylinder port CL and the secondary pressure port P2 are in complete communication.

  Further, a closed delay valve 56 is provided at a branch portion of the cylinder port CL, the secondary pressure port P2 and the pilot port PL of the pressure regulating valve 24. The closing delay valve 56 is integrally incorporated in the pressure regulating valve 24, and forms an orifice channel between the cylinder port CL and the pilot port PL communicating with the secondary side of the automatic valve 12, and is always in communication. The closing delay unit 56 softens the impact when closing the automatic valve 12 by slowly removing the pressurized water from the cylinder chamber when the automatic valve 12 is closed.

(Operation of automatic valve device)
Here, with reference to FIG. 2 and FIG. 3, the operation from the opening of the automatic valve 12 to the pressure control during the sprinkling of the head and the stop of the water discharge by closing the automatic valve 12 will be described.

  In the steady monitoring state during operation, both the pilot valve 20 and the manual start valve 22 are closed, the valve body 42 of the automatic valve 12 is closed by the force of the spring 50, and only from the water supply pipe to the primary side. Of pressurized water is added. If a fire has occurred in the section corresponding to the automatic valve 12 in this state, the pilot valve 20 is opened by remote control. Of course, the manual activation valve 22 may be opened manually when in the field.

  When the pilot valve 20 is opened, the pressurized water applied to the primary side of the automatic valve 12 is supplied to the primary pressure port P1 of the pressure regulating valve 24 via the stop valve 18 and the pilot valve 20, and the pressure regulating valve 24 is Then, the cylinder 44 is supplied from the cylinder port CL to the cylinder chamber 46 a of the automatic valve 12, and the piston 44 strokes downward against the spring 50 to open the valve body 42. When the valve body 42 is opened, the primary pressurized water flows to the secondary side, and is supplied to the water spray head from the secondary side pipe via the test water control valve 16 shown in FIG. Be started.

  When the automatic valve 12 is opened and pressurized water flows to the secondary side, the secondary side pressurized water is supplied to each of the secondary pressure port P2 and the pilot port PL of the pressure regulating valve 24, and the secondary pressure of the automatic valve 12 is applied.

  While the force due to the secondary pressure of the automatic valve 12 applied to the pilot port PL is lower than the specified water discharge pressure determined by the pressure setting spring 50, the valve body 42 continues to be opened by the piston 44, whereby the secondary pressure of the automatic valve 12 is increased. Rises toward the specified water pressure. When the secondary pressure increases, the amount of communication flowing through the second valve body 58 becomes larger than in the initial state.

  Next, when the secondary side pressure of the automatic valve 12 becomes higher than the specified water discharge pressure determined by the pressure setting spring 54 in the state of water discharge from the water spray head in which the automatic valve 12 is opened, the pressure adjustment valve 24 is moved to the lower side until then. Switch from position to upper position.

  When the pressure regulating valve 24 is switched to the upper position, the primary pressure port P1 is disconnected from the cylinder port CL, and the cylinder port CL is completely communicated with the secondary pressure port P2. For this reason, the pressurized water that has been the primary pressure in the cylinder chamber 46a is caused by the pressure difference between the lower secondary pressure of the automatic valve 12 and the second valve body 58 and the closing delay valve 56 of the pressure regulating valve 24. And flows to the secondary side of the automatic valve 12, thereby reducing the pressure in the cylinder chamber 46a.

  When the pressure in the cylinder chamber 46a decreases, the piston 44 strokes downward in the figure to receive the force of the spring 50 and closes the valve body 42, and the opening of the valve body 42 is reduced, so that the secondary pressure becomes the specified water discharge pressure. Be lowered.

  In the same manner, the automatic valve drive unit 14 is changed to a secondary state by switching the valve according to the magnitude relationship of the force due to the secondary pressure applied to the pilot port PL with respect to the specified discharge pressure determined by the spring load of the pressure setting spring 54 of the pressure adjusting valve 24. The valve body 42 is opened and closed so as to maintain the pressure at the specified water discharge pressure, whereby the pressurizing water supplied to the secondary water spray head is adjusted to the specified water discharge pressure.

  When it is confirmed that the fire has been extinguished due to water discharge from the water spray head, the pilot valve 20 is closed. When the pilot valve 20 is closed, the supply of the primary pressurized water to the primary pressure port P1 of the pressure adjustment valve 24 is cut off. At this time, the pressure adjustment valve 24 is in the upper switching position, but the pressure of the pilot port PL is applied. Therefore, the amount of flow due to the communication between the cylinder port CL and the secondary pressure port P2 is larger than that in the initial state.

  Further, the cylinder port CL and the secondary pressure port P2 are communicated with each other by a bypass flow path of the closing delay valve 56. For this reason, the pressurized water at the primary pressure in the cylinder chamber 46 a flows to the secondary side of the automatic valve 12 with the total flow rate of the throttle flow rate determined by the second valve body 58 of the pressure regulating valve 24 and the closing delay valve 56. The pressure in the cylinder chamber 46a decreases.

  As the pressure in the cylinder chamber 46a decreases, the piston 44 strokes quickly until it is completely closed in the direction to close the valve body 42, and then, immediately after the valve body 42 is completely closed, the pressure of the pilot pressure PL decreases. The second valve body 58 is in a substantially closed state in the initial state, and only the flow rate of the closing delay valve 56 is obtained. The valve body 42 strokes gently in the closing direction, closes without causing an impact, and is again pressurized to the primary side. It will be restored to the initial state where is filled.

(Configuration of automatic drain valve)
The automatic drain valve 26 is opened when the pilot valve 20 or the manual activation valve 22 is closed and the pressure of the secondary pressurized water drops below a predetermined drainage release pressure due to stoppage of the automatic valve 12, and the pilot valve 20, The pressurized water filled in the automatic valve drive control system including the manual start valve 22, the pressure adjustment valve 24, and the automatic valve drive unit 14 is drained.

  As shown in the symbol representation of FIG. 3, the automatic drain valve 26 is a check valve (check valve) that holds a ball valve body in an open position by a spring, and is controlled by the pressure of pressurized water charged in the automatic valve drive control system. When the force applied to the ball valve body exceeds a predetermined drainage release pressure determined by the spring load, the ball valve body closes.On the other hand, the force applied to the ball valve body by the water pressure of the pressurized water charged in the automatic valve drive control system falls below the drainage release pressure. When it drops, it opens and drains.

(Configuration of intake mechanism)
When the automatic drain valve 26 is opened due to the pressure drop of the pressurized water accompanying the stoppage of water discharge by the automatic valve 12, the intake mechanism 32 opens the intake port, for example, by opening the intake port. Inhalation facilitates drainage from the automatic drain valve 26.

  In the embodiment of FIGS. 2 and 3, the intake mechanism 32 is provided in a pipe portion connecting the pilot valve 22 and the pressure regulating valve 24, which are connected in parallel with the manual start valve 22. Specifically, as shown in FIG. 1, the intake mechanism 32 is provided at a position close to the lower side of the test water control valve 16 disposed above the automatic valve 12. Are higher than the arrangement positions of the pilot valve 20, the manual start valve 22, the pressure adjustment valve 24, the automatic valve drive unit 14 and the pressure switch 30 included in the automatic valve drive control system.

  Thus, by providing the intake mechanism 32 at a position higher than the stay position of the pressurized water filling the automatic valve drive control system and sucking the atmosphere, the remaining water staying at a position lower than the intake mechanism 32 is removed. The automatic drain valve 26 that is automatically opened can be sufficiently drained in a short time.

  In the drained state in which the automatic drain valve 26 opens due to the stop of water discharge by the automatic valve 12, the pressure adjustment valve 24 indicated by symbol representation in FIG. 3 is switched to the lower switching position in the drawing, and the opening operation of the intake mechanism 32 is performed. As the air is sucked in by the air, the pressurized water staying in the pipe L1 is surely drained from the primary pressure port P1 to the secondary pressure port P2 of the pressure regulating valve 24 and further from the pipe L3 through the automatic drain valve 26. it can.

  On the other hand, the pressurized water staying in the cylinder chamber 46a and the pipe L2 of the automatic valve driving unit 14 is not directly sucked into the atmosphere from the intake mechanism 32, but the pressurized water in the pipes L1 and L3 is surely received by the suction of the atmosphere. However, it takes time compared to the case where the intake mechanism 32 is provided and the air is directly sucked, but the automatic drain valve 26 can be sufficiently drained.

(Intake mechanism structure)
FIG. 4 is an explanatory view showing an embodiment of an intake mechanism having a cap structure provided in the automatic valve device of FIGS. 1 to 3.

  As shown in FIG. 4, the intake mechanism 32 of the present embodiment has a lower end of the main body 60 using the T joint, as is clear from FIG. 1, on the secondary side of the manual start valve 22 positioned below the lower end. The pipe cap is connected, the branch end is connected to the secondary side of the bilot valve 20, and the screw cap 66 is attached to the intake head 62 formed with the external screw located at the upper part of the main body 60 through the seat packing 65. The upper intake port leading to the internal intake passage 64 is closed.

  When the automatic drain valve 26 is opened due to the stop of water discharge by the automatic valve 12, when the screw cap 66 of the intake mechanism 32 is loosened by using a tool and then removed by hand, the intake passage 64 is opened. By sucking air from here, drainage from the automatic drain valve 26 of the pressurized water staying in the automatic valve drive control system can be facilitated, and the remaining water in the automatic valve drive control system can be sufficiently drained.

  FIG. 5 is an explanatory view showing an embodiment of an intake mechanism using an intake valve. As shown in FIG. 5, the intake function 32 of this embodiment has an intake valve 68 attached to the upper end of a main body 60 using the same T joint as in FIG. 4. The intake valve 68 includes an intake head 70 and a handle 72, and an internal passage communicating with an intake port of the intake head 70 can be opened and closed by operating the handle 70. As the intake valve 68, the same one as the exhaust valve 31 shown in FIG. 1 can be used.

  For this reason, when the automatic drain valve 26 opens due to the stop of water discharge by the automatic valve 12, the automatic valve drive control is performed by opening the intake valve 68 by rotating the handle 76 in the opening direction and sucking air from the intake head 70. It is possible to facilitate drainage of the pressurized water staying in the system from the automatic opening valve 26 and sufficiently drain the remaining water of the automatic valve drive control system. Moreover, since it can be opened and closed by operating the handle 70, the operation becomes easier compared to the embodiment of FIG.

  FIG. 6 is an explanatory view showing an embodiment of an intake mechanism using an automatic intake valve. FIG. 6 (A) shows the appearance of the intake mechanism, and FIG. 6 (B) shows the intake mechanism by symbol expression.

  As shown in FIG. 6, the intake mechanism 32 of the present embodiment has an automatic intake valve 74 attached to the upper end of a main body 60 using the same T joint as in FIG. The automatic intake valve 74 opens and sucks air when the pressure of the secondary pressurized water drops below a predetermined intake opening pressure due to the stop of water discharge of the automatic valve 12.

  The automatic intake valve 74 is a check valve (check valve) in which a ball valve body is held at an open position by a spring, as shown in the symbol representation of FIG. 6B, and pressurized water filled in the automatic valve drive control system. It closes when the force applied to the ball valve body by the water pressure exceeds a predetermined intake opening pressure determined by the spring load, while the force applied to the ball valve body by the water pressure of the pressurized water charged in the automatic valve drive control system opens the drainage When it drops below the pressure, it opens and inhales. As such an automatic intake valve 74, the same thing as the automatic drain valve 26 can be used.

  For this reason, when the automatic drain valve 26 is opened due to the stoppage of water discharge by the automatic valve 12, the automatic intake valve 74 is also opened, the atmosphere is sucked from the intake port 76, and the pressurized water staying in the automatic valve drive control system is retained. The drainage from the automatic drain valve 26 is promoted, and the remaining water in the automatic valve drive control system can be sufficiently drained. Further, unlike the intake function of FIGS. 4 and 5, there is an advantage that an operation for intake is not required.

[Second Embodiment of Automatic Valve Device]
FIG. 7 is an explanatory view showing a second embodiment of the automatic valve device of the present invention, and FIG. 8 is an explanatory view showing the automatic valve device of FIG. 7 using equipment symbols.

  As shown in FIGS. 7 and 8, the present embodiment is characterized in that the intake mechanism 32 is provided in the automatic valve drive unit 14. The automatic valve drive unit 14 is provided with an input / output port 52 that communicates with the cylinder chamber 46 a, but further includes an intake port 78 that communicates with the cylinder chamber 46 a, and an intake mechanism 32 outside the intake port 78. . As the intake mechanism 32, any of the embodiments shown in FIGS. 4, 5, or 6 can be used.

  Other configurations are the same as those in the embodiment of FIGS. 2 and 3, and thus the same reference numerals are given and description thereof is omitted.

  In a drained state in which the automatic drain valve 26 opens due to the stop of water discharge by the automatic valve 12, the pressure regulating valve 24 shown by symbol representation in FIG. 8 is switched to the lower switching position in the drawing and communicates with the cylinder chamber 46a. The pressurized water staying in the cylinder chamber 46a and the pipe L1 due to the suction of the air accompanying the opening of the suction mechanism 32 provided in the intake port 78 passes from the cylinder port CL of the pressure regulating valve 24 through the secondary pressure port P2, and further. Water can be reliably drained from the pipe L3 through the automatic drain valve 26.

  On the other hand, the pressurized water staying in the pipe L1 on the secondary side of the pilot valve 20 to which the manual start valve 22 is connected in parallel receives direct intake of air from the intake mechanism 32 provided in the automatic valve drive unit 14. Although the pressure water in the pipes L2 and L3 is surely drained by the suction of the atmosphere, it takes more time than the case where the suction mechanism 32 is provided and the atmosphere is directly sucked. It becomes possible to drain.

[Third embodiment of automatic valve device]
FIG. 9 is an explanatory view showing a third embodiment of the automatic valve device according to the present invention provided with two suction mechanisms. As shown in FIG. 9, in the present embodiment, an intake mechanism 32 a is provided in a pipe portion that connects the pilot valve 20 and the pressure regulating valve 24, in which the manual start valve 22 is connected in parallel, and the automatic valve driving unit 14. An intake mechanism 32b is provided outside an intake port 78 communicating with the cylinder chamber 46a. As the intake mechanisms 32a and 32b, any of the embodiments shown in FIG. 4, FIG. 5, or FIG. 6 can be used.

  In the drained state where the automatic drain valve 26 opens due to the stop of water discharge by the automatic valve 12, the pressure regulating valve 24 shown by symbol representation in FIG. 3 is switched to the lower switching position shown in the figure, and the suction mechanism 32a is opened. As the air is sucked in, the pressurized water staying in the pipe L1 can be reliably drained from the primary pressure port P1 of the pressure regulating valve 24 through the secondary pressure port P2 and further from the pipe L3 through the automatic drain valve 26. .

  Further, the pressurized water staying in the cylinder chamber 46a and the pipe L1 due to the suction of the air accompanying the opening of the suction mechanism 32b provided in the intake port 78 communicating with the cylinder chamber 46a is 2 from the cylinder port CL of the pressure regulating valve 24. Through the secondary pressure port P2, the water can be reliably drained from the pipe L3 through the automatic drain valve 26.

[Modification of the present invention]
Note that the structure of the intake mechanism is not limited to the above-described embodiment, and includes an appropriate structure that opens manually or automatically to intake air.

  Further, the position of the automatic valve drive control system in which the intake mechanism is provided is not limited to the above-described embodiment, and is located at an appropriate position that is higher than the retention position of the pressurized water charged in the automatic valve drive control system. Just place it.

  Further, even if the intake mechanism is installed at a predetermined position lower than the installation positions of the automatic valve drive unit, the pressure adjustment valve, the pilot valve, and the manual start valve, the effect of promoting the corresponding drainage can be obtained.

  Further, the pressure regulating valve is not limited to the above-described embodiment, and the pressurized water staying on the primary pressure port and cylinder port side of the pressure regulating valve is changed to 2 when the water discharge by the automatic valve is stopped. A pressure regulating valve having an appropriate structure is included as long as it can communicate with the next pressure port side and discharge from the automatic drain valve.

The present invention includes appropriate modifications without impairing the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Automatic valve device 12: Automatic valve 14: Automatic valve drive unit 16: Test water control valve 18: Stop valve 20: Pilot valve 22: Manual start valve 24: Pressure adjustment valve 26: Automatic drain valve 28: Manual drain Valve 30: Pressure switch 31: Exhaust valves 32, 32a, 32b: Intake mechanism 34: Valve body 42: Valve body 44: Piston 46: Cylinder 46a: Cylinder chamber 50: Spring 52: Input / output port 56: Closing delay valve 58: Second valve body 60: Main body 62, 70: Intake head 64: Intake passage 65: Seat packing 66: Screw cap 68: Intake valve 74: Automatic intake valve 76: Inlet port 78: Intake port

Claims (7)

When the valve body provided inside the main body is opened by an automatic valve drive unit having a piston / cylinder mechanism, the pressurized water supplied from the primary side is supplied to the water spray nozzle on the secondary side to discharge the water, and the automatic valve An automatic valve for stopping water discharge from the water spray nozzle by closing the valve body by the driving unit;
A test water control valve which is disposed on the secondary side of the automatic valve, is opened at a steady state, and is closed at a test water discharge;
A pilot valve that is opened when water spraying or test water discharge is performed, and supplies primary pressure side pressurized water of the automatic valve to the automatic valve drive unit as an opening pressure of the valve body;
A manual start valve connected in parallel to the pilot valve and opened by manual operation to supply the primary pressure side pressurized water of the automatic valve to the automatic valve drive unit as an opening pressure of the valve body;
An adjusted pressure obtained by adjusting the pressure of the primary side pressurized water supplied by opening the pilot valve or the manual start valve is supplied to the automatic valve driving unit, and the pressure of the secondary side pressurized water is released by driving the valve body. A pressure control valve that controls the water pressure,
The pilot valve or the manual start valve is closed and opened when the pressure of the secondary pressurized water drops below a predetermined drainage release pressure due to the stoppage of the automatic valve, and the pilot valve, the manual start valve, the pressure adjustment valve, An automatic drain valve for draining pressurized water filled in an automatic valve drive control system including an automatic valve drive unit;
In an automatic valve device equipped with
An air intake mechanism is provided that sucks in air when water discharge by the automatic valve is stopped and promotes drainage of pressurized water filled in the automatic valve drive control system from the automatic drain valve. Automatic valve device.
2. The automatic valve device according to claim 1, wherein the intake mechanism is provided at a predetermined position that is higher than the installation positions of the automatic valve driving unit, the pressure adjusting valve, the pilot valve, and the manual start valve. Automatic valve device.
2. The automatic valve device according to claim 1, wherein the intake mechanism is provided in a secondary side piping portion of the pilot valve and the manual start valve.
2. The automatic valve device according to claim 1, wherein the intake mechanism is provided in a drive portion of the automatic valve.
2. The automatic valve device according to claim 1, wherein the intake mechanism is provided in each of a secondary side piping section branch of the pilot valve and a manual start valve and a driving section of the automatic valve. apparatus.
In the automatic valve device according to claim 4 or 5,
The automatic valve drive unit is
A piston connected to the valve body;
A cylinder slidably provided with the piston;
A spring for urging the piston in the closing direction of the valve body;
A pressurized water input / output port that causes the piston to stroke in the valve opening direction by supplying pressurized water to one cylinder chamber partitioned by the piston, and causes the piston to stroke in the valve closing direction by draining the pressurized water;
With
The automatic valve device, wherein the intake mechanism is provided in an intake port communicating with the one cylinder chamber.
  7. The automatic valve device according to claim 1, wherein the intake mechanism includes a cap structure that opens and closes an intake port by attaching and detaching a cap member, an intake valve that opens and closes an intake port by opening and closing operation, or a charging mechanism. An automatic valve device that is an automatic intake valve that opens when the pressure of the pressurized pressurized water drops below the drain opening pressure of the automatic drain valve and opens the intake port.

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