JP5852430B2 - Closed foam head - Google Patents

Description

  The present invention relates to a closed bubble head for extinguishing a fire.

  Conventionally, there are closed sprinkler heads that operate by the heat of fire in the compartment. Since a large amount of water for fire extinguishing is discharged from this closed type sprinkler head, once it is operated, the equipment in the compartment is damaged due to water loss. On the other hand, there is a foam fire extinguisher attached to a parking lot. The foam head attached to the foam fire extinguishing equipment has a foam metal net attached to an open nozzle and is discharged through a simultaneous open valve. In such a foam fire extinguishing system, a separate sensing head for operating the simultaneous opening valve is separately installed, so extra piping is required, and costs and maintenance are troublesome.

  Therefore, a closed type foam head is desired, and for example, there is one using a frame type sprinkler head. This includes a main body having a threaded portion connected to a water supply pipe and a water outlet penetrating through the central portion, a valve body that seals the water outlet of the main body, and two pieces provided downward from the main body. A frame-type sprinkler head comprising a frame composed of an arm and a glass valve that supports a valve body, is provided with a bottomed cylindrical wire mesh for foaming on the lower surface of the main body.

  In this closed type foam head, a valve body is accommodated inside a wire mesh, and this valve body is supported by a glass valve from the outside of the wire mesh. When the glass bulb ruptures during a fire, the valve element is guided and lowered by the guide member provided at the lower part of the valve element, and is seated on the bottom surface inside the wire mesh, and the water outlet is opened. In this way, the foam aqueous solution flowing out from the water discharge port diffuses into the wire mesh at the head of the valve body, and is discharged as bubbles when exiting from the wire mesh. (See Patent Document 1).

  Design registration No. 1317638

  The conventional closed type foam head is provided with two arms around the wire mesh, and the arm protects the wire mesh from external force. However, like the conventional closed type foam head, there are two arms around the wire mesh. If there is only an arm, the wire mesh is exposed and there is a problem that it is easy to receive an impact from the outside.

  The present invention includes a head main body having a water discharge port through which an aqueous foam solution is discharged, an arm connected to a lower portion of the head main body, a valve body that always seals the water discharge port and descends in the event of a fire. A closed-type foam head comprising a heat-sensitive member provided between the valve body and the arm and supporting the valve body at a position where the water outlet is sealed, and a deflector provided at the lower end of the arm, A cylindrical flange portion provided on the outer periphery of the main body, a first foamed net having a smaller diameter than the deflector and provided with an opening in the center of the flange portion, and heat from the valve body An insertion portion provided on the member side, and a lower end of the insertion portion protrudes toward the heat sensitive member from the first foam net, and the foam aqueous solution foamed by the first foam net collides with the deflector to further foam. It is characterized by that.

  Since the foaming net is provided inside the closed type foam head (inside the cylindrical flange portion), the foaming net is not exposed to the outside at normal times and is not easily subjected to external force. Therefore, it is possible to prevent the foam net from being deformed by an external force.

It is sectional drawing of the closed type foam head (before an operation | movement) of this invention. It is sectional drawing of the closed type foam head (at the time of operation | movement) of this invention.

  Hereinafter, the closed-type foam head 1 of the present invention will be described with reference to FIG. In FIG. 1, reference numeral 2 denotes a head main body, and a water discharge port 3 through which fire-extinguishing water (foam aqueous solution) is discharged penetrates the center of the head main body 2. On the outer periphery of the upper portion of the head main body 2, a thread portion for connecting to the falling pipe is formed. A flange portion 2A is formed in the lower portion of the head main body 2, a female screw is formed inside the outer peripheral portion of the flange portion 2A, and the upper portion of the frame 4 having the deflector 7 is screwed thereto.

The frame 4 is provided so as to oppose two arms formed in a plate shape, and a deflector 7 is formed at the lower end of the arm. The deflector 7 is provided with bent plates at equal intervals in the circumferential direction.
Further, a locking step portion 8 that locks the outer periphery of a first foam net 10 described later is formed inside the frame 4. The locking step portion 8 is an upper portion of the frame 4 and is formed at the same height as the lower end of the flange portion 2A, and is formed below the center of the valve body 5 described later, that is, on the heat sensitive member 6 side. The locking step 8 is a step provided along the horizontal direction on the inner upper portion of the frame 4, and the outer periphery of the first foam net 10 is locked to this step.

  Reference numeral 5 denotes a valve body having a large diameter portion 5B below the head portion 5A and an insertion portion 5C below the large diameter portion 5B. The side surface of the insertion portion 5C is inclined so as to become smaller toward the lower end, and further, the lower end of the insertion portion 5C has a recess into which the upper end of the heat sensitive member 6 described later is inserted.

  Reference numeral 6 denotes a heat sensitive member, for example, a glass bulb. Hereinafter, in this embodiment, the heat sensitive member 6 will be described as the glass bulb 6. The glass bulb 6 is provided in the frame 4 and supports the valve body 5. The upper end of the glass bulb 6 is inserted into a recess formed on the lower inner side of the valve body 5, and the lower end is placed on the center of the deflector or a set screw provided at a position where the lower end of the arm 4 is coupled. In this way, the water discharge port 3 is always sealed by the valve body 5.

A plurality of air intakes 9 are provided in the flange portion 2A of the head main body 2, and the outside of the closed-type foam head 1 and the inside of the head main body 2 communicate with each other. When the foam aqueous solution is discharged from the water outlet 3, air is taken in from the air intake 9 and foamed.
Reference numeral 10 denotes a first foam net, which is formed in a donut shape and has an opening for inserting the insertion portion 5C at the center. The opening is formed to have a smaller diameter than the large-diameter portion 5B of the valve body 5, and the lowering of the valve body 5 is stopped when the large-diameter portion 5B is engaged with the opening.
Reference numeral 11 denotes a second foam net that is formed in a cylindrical shape that is the same as or slightly larger in diameter than the outer shape of the valve body 5 and is provided in the head body 2 between the water outlet 3 and the first foam net 10. . In addition, the center of the water discharge port 3, the valve body 5, the 1st foaming net | network 10, the 2nd foaming net | network 11, the glass valve | bulb 6, and the deflector 7 is provided so that it may be on the same straight line.

Then, the operation | movement at the time of the fire of the closed type foam head in this invention is demonstrated using FIG.
In the event of a fire, the glass bulb 6 is ruptured by the heat of the fire, the valve body 5 that has sealed the water outlet 3 is lowered, and the water outlet 3 is opened. When the glass bulb 6 is ruptured, broken pieces of the glass bulb 6 fall from between the frames 4. Then, the valve body 5 supported by the glass valve 6 is lowered. When the valve body 5 starts to descend, the insertion portion 5 </ b> C provided at the lower portion of the valve body 5 lowers the valve body 5 vertically along the central opening of the first foam net 10.

  At this time, since the side surface of the insertion portion 5 </ b> C is inclined, the insertion portion 5 </ b> C can be smoothly lowered without being caught by the opening of the foam net 10. Furthermore, since the second foamed net 11 is formed to have the same or a larger diameter than the outer diameter of the large diameter portion 5B of the valve body 5, the second foamed net 11 is Since it also serves as a guide member that guides the lowering of the body 5, the valve body 5 descends more smoothly. And the large diameter part 5B latches in the opening part of the foaming net | network 10, and the valve body 5 stops a descent | fall at the height of the latching step part 8 of the arm 4. FIG.

When the valve body 5 is opened, the aqueous foam solution is discharged from the water outlet 3. Then, the foam aqueous solution passes through the second foaming net 11, then entrains the air taken in from the air intake 9, collides with the first foaming net 10 and foams. At this time, since the foam aqueous solution is pre-foamed when passing through the second foam net 11, it can be more efficiently foamed when colliding with the first foam net 10.
Thereafter, the foamed aqueous foam solution is further foamed by the force of impinging on the deflector 7 provided at the lower end of the arm 4 and radiated into the protection area.

  As described above, since the first foamed net 10 and the second foamed net 11 are provided inside the head main body 2 according to the present invention, the foamed net is not exposed to the outside and is not easily affected by external force. It is possible to prevent deformation of the foamed net.

  In the present embodiment, the second foam net 11 is provided between the water outlet 3 and the first foam net 10, but the second foam net 11 may be eliminated.

  In the present embodiment, the air intake 9 is provided in the flange portion 2 </ b> A, but may be provided in the upper portion of the head main body 2. In particular, as shown by a broken line in FIG. 2, an opening that communicates from the head main body 2 so as to go to the large-diameter portion 5B side and the inside of the second foam net 11 from the water discharge port 3 may be provided. Thereby, when foam aqueous solution hits the 2nd foaming net | network 11, since it entrains and foams, air expansion ratio can be adjusted highly.

  Further, a radial or spiral groove may be provided in the head portion 5A of the valve body 5 so that the aqueous foam solution radiated from the discharge port 3 may be equally applied to each foamed net.

DESCRIPTION OF SYMBOLS 1 Closed-type foam head, 2 Head main body, 2A flange part, 3 Outlet, 4 Arm, 5 valve body, 5A head, 5B large diameter part, 5C insertion part, 6 Thermal member (glass valve), 7 Deflector, 8 Locking step, 9 air intake, 10 first foamed net, 11 second foamed net.

Claims (4)

A head body through which a water discharge port through which aqueous foam solution is discharged is provided; an arm connected to a lower portion of the head body; a valve body that normally seals the water discharge port and descends in the event of a fire; A closed-type foam head comprising a heat sensitive member provided between a valve body and the arm and supporting the valve body at a position where the water outlet is sealed, and a deflector provided at a lower end of the arm. And
A cylindrical flange provided on the outer periphery of the head body;
A first foamed net that is provided on the inside of the flange portion and has an opening formed in the center and having a smaller diameter than the deflector ;
And interpolation communicating portion provided on the thermosensitive member side from said valve body,
With
The lower end of the insertion passage part protrudes thermosensitive member side than the first foam network,
A closed-type foam head characterized in that the foam aqueous solution foamed by the first foaming net is caused to collide with the deflector and further foamed .
The second foaming net having the valve body therein and having a larger diameter than the valve body is provided between the water outlet and the first foaming net. The closed-type foam head according to claim 1.
Claim 1 or 2 closed foam head according to characterized in that a suction port in the side surface of the head body.
A head body having a water outlet formed therein; an arm connected to a lower portion of the head body; a valve body that normally seals the water outlet and descends in the event of a fire; the valve body and the arm; A closed-type foam head provided with a heat sensitive member that supports the valve body at a position that seals the water outlet,
A cylindrical flange provided on the outer periphery of the head body;
A plate-like first foamed net provided inside the flange portion and having an opening formed in the center;
An insertion portion provided on the heat sensitive member side from the valve body;
With
The lower end of the insertion portion protrudes toward the heat sensitive member from the first foam net,
A closed type characterized in that the second foaming net having the valve body therein and having a larger diameter than the valve body is provided between the water outlet and the first foaming net. Foam head.