JP3136361B2 - Automatic pressure regulating on-off valve for fire hydrant equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-regulating on-off valve for a fire hydrant device.

[0002]

2. Description of the Related Art A plurality of fire hydrant devices are provided on a wall of a tunnel or a building. This device is provided with a main valve (fire hydrant valve), that is, a valve that is opened for water discharge during fire extinguishing, and a nozzle that is connected to the main valve via a hose or the like and that can move to a fire extinguishing point. I have. And
When the main valve is opened, water discharge is started from the nozzle. If the water discharge pressure of the fire-extinguishing liquid to be discharged becomes too high, the nozzle operator is swung and becomes extremely dangerous.

Therefore, conventionally, an automatic pressure regulating valve is provided between the main valve and the nozzle in order to automatically adjust the water discharge pressure.
In this automatic pressure regulating valve, a slidable stem is provided through a valve chamber communicating with a fire extinguishing liquid supply source, a first valve body and a second valve body are provided in the stem, and both ends of the stem are provided. A first flam chamber and a second flam chamber having different pressure receiving areas are formed by respectively fixing the flams, and the two flam chambers are communicated with the fire extinguishing nozzle to adjust the water discharge pressure. (Japanese Patent Laid-Open No. 2
-95384 gazette)

[0004]

In the conventional automatic pressure regulating valve, the internal pressure of the hose and the water discharge pressure are constant regardless of the supply pressure of the fire extinguishing liquid, so that the operation of the fire extinguishing nozzle can be performed safely. However, in this automatic pressure regulating valve, if the valve of the fire extinguishing nozzle is closed while the main valve is open, the supply pressure is applied to the hose as it is, which is very dangerous. Therefore, it cannot be used unless a safety valve is provided on the hose side. In addition, the main valve and the automatic pressure regulating valve must be provided separately.

[0005] Further, after the fire is extinguished, in order to stop the water supply to the nozzle, it is troublesome because the operator must move to the position of the main valve and close the valve. Further, since water cannot be discharged from the nozzle unless the main valve is opened, for example, a worker who is in a panic during a fire may extend the hose without opening the main valve and carry the nozzle to the fire extinguishing position. In this case, it is necessary to return to the vicinity of the main valve and open the main valve again, so that the start of the fire extinguishing operation is delayed and the initial fire extinguishing becomes difficult.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide an on-off valve having the function of an automatic pressure regulating valve.

[0007]

SUMMARY OF THE INVENTION The first invention, the opening and closing valve which opens when the water discharge of the extinguishing liquid from the nozzle for digestion fire extinguishing nozzle is connected to the secondary side, the secondary side of the opening and closing valve Pressure
Pressure regulating means for automatically adjusting the pressure on the secondary side of the on-off valve to a predetermined pressure by adjusting the opening degree of the valve body in accordance with the receiving pressure of the receiving flam. Is a self-regulating on-off valve of a fire hydrant device,

In a second aspect of the present invention, a slidable stem is provided through a valve chamber communicating with a fire extinguishing liquid supply source, and a valve body seated on a seat of the valve chamber when the valve is closed. Provided,
An automatic pressure regulating on-off valve for a fire hydrant device, characterized in that a flam is fixed to at least one end of the stem to form a flam chamber, and the flam chamber is connected to a fire extinguishing nozzle.

[0009]

When the fire extinguishing liquid is supplied from the fire extinguishing liquid supply source to the automatic pressure regulating on-off valve, the pressure on the secondary side of the on-off valve is increased.
Stem slides in response to pressure forces Hula arm receiving, opening of the valve body is adjusted. Therefore, the water supply pressure on the secondary side is adjusted to a predetermined pressure. When the valve body is seated by sliding the stem, the valve closes and the discharge of water from the nozzle stops.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the accompanying drawings, wherein the same reference numerals have the same names and functions. For example, a fire hydrant hydrant 3 and an automatic pressure regulating on-off valve 5 that communicate with a fire extinguishing liquid supply source 1 are provided in a housing (not shown) of a forward tilting fire hydrant device. The self-regulating on-off valve 5 includes a body 6, a hood 8 covering an upper opening of the body 6, and a spring case 9 covering a lower opening of the body 6.

A valve chamber 11 provided with a spool 10 is provided in the body 6, an inlet 11a of the valve chamber 11 is connected to a fluid inlet 14, and an outlet 11b of the valve chamber 11 is connected to a first port.
Fluid outlet 1 via flam chamber 12 and second flam chamber 13
5 is connected. A seat (valve seat) is provided on the inner peripheral surfaces of the upper end and the lower end of the spool 10 via a sheet retainer 17.
16 are provided. At the center of the spool 10, a stem 19 having two valve elements 18a and 18b having the same diameter is provided so as to pass therethrough. The valve bodies 18a and 18b are arranged at a predetermined distance from each other, and can be seated on the seat 16 at the same time.

At the upper and lower ends of the stem 19, the body 6 is provided.
Are provided, and a first flam chamber 12 and a second flam chamber 13 are formed. Both flams 20 and 21 are stems 19
The pressure receiving area of the second flam 21 is formed larger than that of the first flam 20.

A shaft 30 fixed to the stem 19 of the flam 22 on the side of the first flam chamber 12 is inserted through the bonnet 8 and has a lever 32. The lever 32 is a lever mount 3 fixed to the bonnet 8.
1 is provided rotatably. A trigger 40 for fixing the stem 19 via the shaft 30 is provided at the upper end of the hood 8.

The second flam chamber 1 is provided in the spring case 9.
Spring 42 for pressing is provided a three-side Fulham receive 22 to the valve chamber 11 side, that is the valve opening side. A magnet base 46 is fixed to the lower end of the stem 19, and a magnet 48 facing the proximity switch 47 is provided on the magnet base 46.

Next, the operation of this embodiment will be described.
Valve chamber 1 of self-regulating on-off valve 5 from fire extinguishing liquid supply source 1
1 is supplied with the fire extinguishing liquid A, but since the stem 19 is locked by being engaged with the trigger 40, the first valve body 18a and the second valve body 18b are seated and closed. I have. Therefore, the fire extinguishing liquid A is not supplied to the flam chambers 12 and 13.

When the fire extinguishing nozzle 35 is removed from the holder 34, the wire 50 is pulled in the direction A40, and the trigger 40 changes from the state of FIG. 2 to the state of FIG. Then, the stem 19 slides in the axial direction by the bias of the spring 42, and the valve bodies 18a and 18b gradually separate from the seat 16 and open. At this time, the magnet 48 also gradually moves upward, so that the proximity switch 47 is turned off and a pump (not shown) is turned on.
Start up and start water supply.

Then, the valve bodies 18a and 18b change from the half-open state in FIG. 4 to the fully-open state in FIG.
2, 13 and supply to the fire extinguishing nozzle 35 through the hose 33. At this time, if the water supply pressure in the hose becomes too high, the second flam 21 having a larger pressure receiving area than the first flam 20 can be used.
Moves downward against the bias of the spring 42 due to the pressure difference, and brings the valve bodies 18a and 18b closer to the seat 16 to bring them into a half-open state as shown in FIG. Therefore, valve room 1
The fire extinguishing liquid A flowing out of the nozzle 1 into the flam chambers 12 and 13 is adjusted in pressure, and at a predetermined pressure from the outlet 15 through the hose to the nozzle 3.
5 is supplied.

Conversely, when the fluid pressure on the side of the flam chambers 12 and 13 decreases, the pressure difference between the first flam chamber 12 and the second flam chamber 13 having different pressure receiving areas decreases, and the second flam 21 Is pushed up to the valve chamber 11 side, so that the stem 19 rises and the valve body 1
The fire extinguishing liquid A flowing out of the valve chamber 11 is separated from the seats 8a and 18b, the pressure thereof is regulated, and the fire extinguishing liquid A is discharged from the outlet 15 at a predetermined pressure. Then, after the fire extinguishing operation is completed, the lever 19 is turned to lower the stem 19, the valve bodies 18a and 18b are seated on the seat 16 to close the valve, and the trigger 40 is engaged to lock.

In the above embodiment, the case where the valve is closed using the trigger 40 has been described. However, the valve closed state can be maintained without the trigger 40 as follows. That is, the pressing force of the spring 42 of the self-regulating on-off valve 5 connected to the water supply source 1 is adjusted so that the valve bodies 18a and 18b close when the secondary pressure reaches a predetermined pressure. The fire extinguishing nozzle 35 is provided with an open / close valve. When the fire extinguishing nozzle is closed and the fire extinguishing liquid is fed from the supply source to fill the fire extinguishing nozzle with water, the stem 19 slides until the pressure on the secondary side becomes equal to a predetermined pressure.

When the pressure on the secondary side becomes equal to a predetermined pressure, the sliding of the stem 19 is stopped, and the valve bodies 18a and 18b are seated on the seat 16 and automatically closed. Then, when the fire extinguishing nozzle is opened, the pressure on the secondary side becomes lower than the predetermined pressure, so that the stem 19 slides and the valve bodies 18a, 18
b is separated from the seat 16 and opens. Since the primary pressure during valve closing acts on the valve elements 18a and 18b having the same pressure receiving area in the opposite directions, the opening and closing of the valve is not affected by the primary pressure.

In the automatic pressure regulating on-off valve of this embodiment, the fire extinguishing liquid is reliably ejected from the nozzle simply by opening the fire extinguishing nozzle to the fire extinguishing position and there is no trouble in operation. Therefore, even if the fire extinguishing operation is unfamiliar, the fire extinguishing activity can be performed without fail, and early extinguishing is possible.

In the above embodiment, the first and second flams 20 and 21 are provided to provide two flam chambers 1 having different pressure receiving areas.
Although two and 13 are provided and the two valve bodies 18a and 18b are provided on the stem 19, a single flam chamber or valve chamber may be provided.

In FIG. 1, for example, the flam 20 at the upper end of the stem 19 is omitted, the upper end of the stem 19 is made to penetrate the bonnet 8 in a watertight manner, and a lever 32 is connected to the upper end of the flam 8 to connect the flam chamber to the second chamber. Only the flam chamber 13 is used.

With this configuration, the second flam chamber 13
When the pressure becomes equal to or less than a predetermined pressure, the stem 19 is pushed up by the action of the spring 42, and the fire extinguishing liquid A flowing out of the valve chamber 11 is regulated. extinguishing liquid A flowing out of the valve chamber 11 Te press under Gerare is pressure regulated.

When one valve element 18 is used, for example, the second valve element 18b and the lower seat 16 on which the second valve element 18b is seated are removed, and the stem 19 is passed through the valve chamber 11 in a watertight manner. Let it. In this case, unlike the above embodiment, when the valve is closed, a force acting upward is exerted by the primary water supply pressure acting on the first valve body 18a, so that the pressure receiving area of the second flam chamber 13 is reduced. It is sufficient to increase the force, reduce the force of the spring 42, or omit the spring 42.

[0026]

The present invention is configured as described above.
The pressure on the secondary side can be adjusted to a predetermined pressure, and the valve can be opened and closed. Therefore, since this on-off valve also has the function of the conventional automatic pressure regulating valve, unlike the conventional example, the automatic pressure regulating valve can be omitted, and the fire hydrant device can be provided with less equipment.

[Brief description of the drawings]

FIG. 1 is a longitudinal section showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 4;

FIG. 4 is a longitudinal sectional view showing another state of FIG. 1;

FIG. 5 is a longitudinal sectional view showing still another state of FIG. 1;

FIG. 6 is a schematic diagram showing the entire fire hydrant device of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 fire extinguishing liquid supply source 5 automatic pressure regulating on-off valve 11 valve chamber 12 first flam chamber 13 second flam chamber 18a first valve element 18b second valve element 19 stem 20 first flam 21 second flam 35 nozzle fire extinguishing nozzle

Claims (4)

(57) [Claims] A fire-extinguishing nozzle is connected to the secondary side , and an opening / closing valve that opens when the fire-extinguishing liquid is discharged from the fire-extinguishing nozzle is connected to a receiving pressure of a flam receiving a pressure on a secondary side of the opening-closing valve.
A self-regulating on-off valve for a fire hydrant device, comprising pressure regulating means for automatically adjusting the pressure on the secondary side of the on-off valve to a predetermined pressure by adjusting the degree of opening of the valve element accordingly . Wherein provided through the slidable stem into the valve chamber to supply and communication firefighting liquid, provided with a valve body seated on the seat of the valve chamber when the valve is closed to the stem, said stem at least one end fixed Fulham form Fulham chamber, self-pressure off valve extinguishing fire plug device being characterized in that allowed communicating the Fulham chamber to the nozzle for extinguishing fire. 3. A slidable stem is provided through a valve chamber communicating with a fire extinguishing liquid supply source, and the first and second seats of the valve chamber are simultaneously provided to the stem when the stem is opened. A first valve body and a second valve body to be seated are provided, flams are fixed to both ends of the stem to form two flam chambers having different pressure receiving areas, and the stem is urged toward the valve opening side. An automatic pressure regulating on-off valve for a fire hydrant device, wherein the two flam chambers are connected to a fire extinguishing nozzle. 4. The self-regulating on-off valve of a fire hydrant device according to claim 1, wherein a valve closing lock means is provided on the stem.