JPH0712382B2 - Wet pre-actuated running water detector - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a wet pre-actuation type running water detection device for discharging water for extinguishing water in a sprinkler fire extinguishing facility when a fire occurs.

(Prior Art) Conventionally, in this type of pre-operation fluid detection device, in order to avoid water discharge for fire extinguishing when an abnormality occurs in the closed type sprinkler head, compression is applied to the secondary chamber side of the open valve. A so-called dry type in which air is enclosed or emptied is used.

Then, while the gas is exhausted from the sprinkler heads by the operation of a number of sprinkler heads attached to the secondary chamber side piping, the fire extinguishing water on the primary chamber side is opened when the open valve is opened by the operation of a fire detector or the like. Is sent to each sprinkler head via piping etc., and water discharge is started.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional means, since the secondary chamber side including the pipe is filled with gas, the operation of the sprinkler head in the event of a fire actually occurs. It takes a considerable amount of time for the fire extinguishing water on the primary chamber side to be sent from a large number of sprinkler heads to the sprinkler head. There is a fatal problem that the size of the entire device becomes large, because the size of the device must be large and the amount of water in the water source must be large.

Therefore, the present invention was made in order to solve the above-mentioned conventional problems, without making the piping equipment and the fire extinguishing equipment large, it makes the fire extinguishing water discharge by each sprinkler head good, and the initial fire extinguishing The task is to contribute greatly to the flights.

Another problem is that even if an abnormal situation occurs in the sprinkler head due to a mechanical shock or the like, processing can be performed only in the secondary chamber side without operating the primary chamber side.

(Means for Solving the Problem) That is, according to the present invention, the communication part between the primary chamber 2 to which the fire extinguishing water is sent and the secondary chamber 3 to which the closed type sprinkler head 33 is connected via the pipe 51 is opened and closed. And an opening valve 20 having a valve body 6 for operating the opening valve 20. The opening valve 20 is configured to maintain a closed state in a state where a pressure fluid is filled in the pipe 51 and the secondary chamber 3. In the pre-operation type water flow detection device, when the secondary valve 3 side of the opening valve 20 has a lower pressure than the primary chamber side 2 and an abnormality occurs in the sprinkler head 33, the primary chamber side 2 is It is a wet type pre-operation type running water detection device in which a liquid that flows out to the outside is sealed regardless.

(Operation) Therefore, in the device characterized by the above structure, when an abnormal situation such as the sprinkler head 33 is inadvertently destroyed due to a mechanical shock or the like, not an actual fire, Only the liquid sealed in the secondary chamber 3 side flows out, but since the primary chamber 2 side is in a closed state, the fire extinguishing water in the primary chamber 2 side is never discharged, and in such an abnormal situation It can be dealt with.

Moreover, by enclosing the liquid in the secondary chamber 3 side, if a fire actually occurs, the sprinkler head 33
The valve body 6 of the release valve 20 is opened by both operations of the fire alarm and the fire detector. At that time, the liquid enclosed in the secondary chamber 3 is first discharged from the sprinkler head 33, so that the conventional dry type is used. It is possible to start water discharge immediately without increasing the diameter of the pipe as in the device of No.

Example An example of the present invention will be described below.

In FIG. 1, reference numeral 1 designates a primary chamber 2 and a secondary chamber 3 in a horizontal direction, and a valve seat 4 is opened between the two chambers 2 and 3 to establish a communication port 5.
The valve casing formed by forming is shown. Reference numeral 6 denotes a bottomed, substantially cylindrical valve element provided facing the upper surface side of the valve seat 4,
A diaphragm 7 whose outer peripheral edge is sandwiched between a valve casing 1 and an upper cover body 10 is attached to the upper portion thereof, and a fluid pressure chamber 8 is formed by the valve body 6, the diaphragm 7 and the upper cover body 10. Are formed.

Reference numeral 9 is a latch mechanism portion for maintaining the lifted state of the valve body 6 when the valve body 6 is raised. The mechanism portion 9 is an upper cover body.
Vertically screw the spindle 11 to the 10
A holder 14 having an engaging portion 13 projecting on the upper surface of the bottom portion of the valve body 6 and engageable with the engaging portion 13 at the lower end portion is provided on the outer peripheral side of the valve body 11, and is projecting on the inner peripheral surface of the holder 14. The mountain-shaped convex portion 15 is pressed by the convex portion 16 of the spindle 11 so that the holder 14 opens the leg with the upper supporting portion 17 as a fulcrum.

Reference numeral 18 denotes a hole formed at an upper position of the valve casing 1 so as to face the diaphragm 7, and is connected with a pressure detector 19 which is activated to give an alarm when the water for extinguishing the fire reaches a predetermined pressure value. ing. Reference numeral 20 is an open valve having the above configuration.

Reference numeral 21 is a pipe portion for supplying a liquid such as water to each portion of the opening valve 20, and is provided with a base pipe 25 connected to a liquid supply source such as a pump 22 and having a maintenance control valve 23 and an orifice valve 24. ing. Reference numeral 26 is a pipe on one side where the base pipe 25 is branched, the pipe 26 is connected to the fluid pressure chamber 8 of the release valve 20, and the liquid in the pipe 26 and the fluid pressure chamber 8 is connected in the middle of the pipe. A manual release valve 28 for releasing to the outside, and a solenoid valve as an example of opening means for opening the release valve 20 of the present invention.
27 are connected to each other.

The solenoid valve 27 and the manual opening valve 28 are normally closed, and the mounting state of the solenoid valve 27 will be described later.

32 is the other pipe branched from the base pipe 25.
Is connected to the inside of the secondary chamber 3 of the opening valve 20 via the control valve 34 for maintenance. Reference numeral 29 denotes a pressure switch that is turned on when the pressure in the pipe 32 is detected and the pressure value becomes lower than a predetermined set value.

Reference numeral 30 denotes a relay which is connected to a fire detector 31 separately provided in the fire extinguishing area and is turned on by a fire detection reaction of the fire detector 31. A power supply for driving the solenoid valve 27 is connected to one side of the relay 30, and the pressure switch 29 is connected to the other side.
Is electrically connected to the solenoid valve 27 via.

The present embodiment has the above configuration, and its operation will be described below.

First, a pipe 51 having a closed type sprinkler head 33 attached thereto is connected to the secondary chamber 3 side of the open valve 20 as shown by a chain double-dashed line. Further, while the other primary chamber 2 is connected to the water supply side of the fire extinguishing water, the liquid is supplied into the fluid pressure chamber 8 through the pipes 25 and 26 to reduce the pressure P ₂ in the fluid pressure chamber 8. For example, it is set to 3 kg / cm ² , and the valve body 6 is lowered against the primary pressure P ₁ on the primary chamber 2 side to close the open valve 20. At that time, the liquid is also supplied into the secondary chamber 3 through the pipe 32 to keep the inside of the secondary chamber 3 at a predetermined pressure. The pressure in the secondary chamber 3 is the pressure switch.
It suffices to set the pressure low enough to operate 29, so that the pressure on the side of the secondary chamber 3 becomes lower than that on the side of the fluid pressure chamber 8 and the side of the primary chamber 2. The pressure is adjusted by the control valve 34 or the like.

Thus, in this state, when only the fire detector 31 provided in the fire extinguishing area operates for a reason other than a fire, the relay 30 is turned on, but at that time, the sprinkler head 33 is not opened at all, and the piping Since the liquid having a predetermined pressure exists in the 51, the secondary chamber 3, and the pipe 32, the pressure switch 29 remains off.
Therefore, there is no conduction between the relay 30 and the solenoid valve 27,
The solenoid valve 27 is kept closed to maintain the liquid pressure in the fluid pressure chamber 8, and the open valve 20 may be opened depending on the malfunction of the fire detector 31.
Does not open.

On the other hand, if the fire detector 31 does not show a fire reaction and the sprinkler head 33 is subjected to a mechanical shock or the like and an abnormal situation such as accidental opening or destruction occurs, the secondary chamber 3 and the pipe 51 The liquid flows out through the sprinkler head 33 to turn on the pressure switch 29.

However, since the other relay 30 remains off, the solenoid valve 27 is not opened even in this case, and the open valve
20 closed states are retained.

Therefore, since the amount of liquid flowing out from the sprinkler head 33 is small and low in pressure, not only is water discharged over a wide range and there is no actual damage, but an abnormal situation can be confirmed by the liquid flowing out from the secondary chamber 3 side. Of.

Next, when a fire actually occurs in the fire-extinguishing area, the relay 30 is turned on, and at the same time, the liquid in the secondary chamber 3 and the pipe 51 is released from the sprinkler head 33 opened due to the fire to the outside. The pressure switch 29 is turned on when the pressure in the pipe 32 drops due to the outflow.

Therefore, the solenoid valve 27 is brought into conduction and is brought into an open state, the liquid in the fluid pressure chamber 8 is discharged through the solenoid valve 27, and the pressure in the fluid pressure chamber 8 is lowered. As a result, the pressure balance between the pressure P ₂ in the fluid pressure chamber 8 and the primary pressure P ₁ on the primary chamber 2 side is disrupted, the valve body 6 rises as shown in FIG. 2 and the open valve 20 is opened, From the sprinkler head 33, appropriate fire extinguishing water is discharged.

That is, by enclosing the liquid in the secondary chamber 3 side, when a fire actually occurs, the valve body 6 of the opening valve 20 is opened by both operations of the sprinkler head 33 and the fire detector. In that case, first, the liquid enclosed in the secondary chamber 3 is discharged from the sprinkler head 33, and the fire extinguishing water sent from the primary chamber 2 side is continuously discharged, so that the conventional dry type device is used. Water discharge can be started immediately without increasing the pipe diameter.

When the open valve 20 in the present embodiment is opened, the valve body 6 is latched by the latch mechanism portion 9 as shown in the figure, so the valve body 6 unduly descends during fire extinguishing and water discharge is interrupted. There is nothing to do. At the time of returning work after extinguishing water by extinguishing the fire, the spindle 11 may be lowered to release the engagement between the holder 14 and the engaging portion 12 of the valve body 6, and the valve body 6 may be lowered again.

Further, when the valve body 6 is lifted and the open valve 20 is in the open state, the seal closing of the hole 18 bored in the valve casing 1 by the diaphragm 7 is released and the fire extinguishing water flows into the hole 18 for alarming. Since the switch 19 operates, the rising state of the valve body 6 can be easily confirmed from the outside by the alarm.

In the above embodiment, the same liquid supply source 22 is connected to the fluid pressure chamber 8 and the secondary chamber 3 of the open valve 20 to simplify the piping structure, but the present invention is by no means limited to this. Not done.
The liquid supply sources for the secondary chamber 3 and the fluid pressure chamber 8 may be separately provided.

For example, as shown in FIG. 3, the fluid pressure chamber 8 and the primary chamber 2 of the opening valve 20.
It is also possible to connect with and to introduce the fire extinguishing water into the fluid pressure chamber 8 and to close the opening valve 20 by the pressure of the fire extinguishing water in the fluid pressure chamber 8.

In this case, an electromagnetic valve 27 is provided in the connecting pipe between the fluid pressure chamber 8 and the primary chamber 2, and a liquid supply means is separately provided on the secondary chamber 3 side so as to supply a liquid having a lower pressure than the primary chamber 2. It should be provided.

Further, in the above embodiment, the pressure switch 29 is provided between the solenoid valve 27 for opening the open valve 20 and the relay 30 connected to the power source, but the present invention never uses these connection modes. Not limited to.

Further, in the above embodiment, the electromagnetic valve 27 is mentioned as an example of the means for opening the opening valve 20, but the present invention is not limited to such means. For example, a motor-operated valve may be used instead of the solenoid valve 27, and as shown in FIG. 4, the valve shaft 35 is moved up and down in order to open and close the valve body 6 of the opening valve 20 by moving the valve shaft 35 up and down. It does not matter even if the electric motor 36 is connected and provided.

In addition, in the present invention, all the specific configurations of the relay 30, the pressure switch 29, and the release valve 20 can be arbitrarily changed in design within the scope intended by the present invention.

Further, the specific numerical value or the like at which the pressure switch 29 is turned on can be appropriately changed as necessary.

(Effects of the Invention) As described above, the present invention is such that an abnormal situation occurs in the secondary chamber side of the open valve to which the closed type sprinkler head is connected via piping, at a pressure lower than that of the primary chamber side, and in the sprinkler head. In this case, since the liquid that flows out to the outside regardless of the primary chamber side is sealed, for example, when an abnormal situation occurs in the sprinkler head, only the liquid on the secondary chamber side flows out from the sprinkler head. However, the fire extinguishing water on the primary chamber side is never discharged, and the amount of liquid flowing out is small.

On the other hand, when a fire actually occurs, the valve element of the release valve opens due to the operation of both the sprinkler head and the fire detector.In that case, first, the liquid enclosed in the secondary chamber side is the sprinkler head. Since it is discharged from the water, without increasing the pipe diameter etc. like the conventional dry type device,
As a result of being able to start water discharge immediately, it has achieved a remarkable effect that it can greatly contribute to the flight of the initial fire extinguishing.

As described above, the present invention relates to a pre-operation type fluid detection device,
Since a so-called wet system in which a low-pressure liquid is preliminarily filled in the secondary chamber side is adopted, the above-mentioned special effect is obtained as compared with the conventional dry system.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a flowing water detection device according to the present invention. FIG. 2 is an explanatory view showing the operating state thereof. FIG. 3 and FIG. 4 are cross-sectional views of essential parts showing another embodiment. 2 …… Primary chamber, 3 …… Secondary chamber 6 …… Valve body, 20 …… Open valve 33 …… Closed type sprinkler head 51 …… Piping

Claims (1)

[Claims] 1. An open valve having a valve body 6 for opening and closing a communication part between a primary chamber 2 to which water for extinguishing water is sent and a secondary chamber 3 to which a closed type sprinkler head 33 is connected via a pipe 51. A pre-operation type water flow detection device comprising 20 and configured such that the opening valve 20 is maintained in a valve closed state in a state where a pressure fluid is enclosed in the pipe 51 and the secondary chamber 3. ,
On the secondary chamber 3 side of the release valve 20 at a lower pressure than the primary chamber side 2,
A wet type pre-operation type running water detection device is characterized in that when a malfunction occurs in the sprinkler head 33, a liquid that flows out to the outside regardless of the primary chamber side 2 is sealed.