JP5714971B2 - Closed foam head - Google Patents

Description

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

Some conventional closed-type foam heads utilize 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

A conventional closed type foam head is composed of a frame type sprinkler head composed of two arms, and a glass bulb is held by the arm. Since the glass bulb is made of glass, it may be broken by external force. Like the conventional closed-type foam head, if there are only two arms around the glass bulb, the glass bulb is exposed and the impact from the outside There is a problem that it is easy to receive.

The present invention provides a head main body having a water outlet formed therein, a cylindrical frame connected to a lower portion of the head main body and having a water spray port formed on the outer periphery thereof, and provided in the frame. sealed, a valve body drops at the time of a fire, provided in the frame, a closed foam head and a heat sensitive member supporting the valve member, the valve body in the opening of Chuo is held wire mesh Is provided in the frame, and a holding portion for holding the outer periphery of the wire mesh is provided on the inner wall of the frame, and the length of the heat sensitive member is longer than the vertical length from the lower end of the inner wall of the frame to the height of the holding portion. The valve body is held in the opening, or the heat sensitive member is inserted .

Since the frame constituting the closed-type foam head is cylindrical and has a water spout on the outer periphery, the glass bulb that supports the valve element inside the frame is not exposed to the outside and is not easily subjected to external force. Therefore, it is possible to prevent the glass bulb from being broken by an external force.

Since the wire mesh is provided above the glass bulb and is normally provided at a position where the water spout is not blocked, fragments of the glass bulb are discharged from the water spout of the frame after the glass bulb ruptures. Therefore, glass bulb fragments do not remain in the frame and do not hinder watering. In addition, since the water spout is not blocked by the wire mesh, a hot air current is likely to hit the glass bulb.

Further, since the valve body is held at the center of the wire mesh and the outer periphery of the wire mesh is held by the inner wall of the frame, the valve body is lowered to a predetermined position by the wire mesh after the glass valve is ruptured. Therefore, the wire mesh also has a function as a guide member, and a guide member for lowering the valve body is not necessary.

It is sectional drawing of the closed type foam head (before an operation | movement) of this invention. It is a side view of the closed type foam head of the present invention (before operation). It is a bottom view of the closed type foam head of the present 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 FIGS. 1 to 3. 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 at the lower portion of the head 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 water spout 7 is screwed thereto. The frame 4 has, for example, a substantially conical shape whose diameter is reduced downward or a bottomed cylindrical shape having a trapezoidal cross section.

The frame 4 is composed of eight arms formed radially, and a water spout 7 is formed between the arms. The water spout 7 of the frame 4 is formed on the peripheral surface of the frame 4 with a predetermined size. The water spray ports 7 are provided at equal intervals in the circumferential direction. For example, eight water spray ports 7 are provided in the frame 4. The size of the water spout 7 is preferably larger than the width of the heat-sensitive member 6 described later. Thereby, the flow of the hot air flow into the frame 4 is improved, the detection accuracy is improved, and when a heat sensitive member 6 described later is ruptured, the fragments can be discharged out of the frame 4. Although the shape of the water spout 7 is formed in the substantially triangular shape which the downward side sharpened, the shape is not specifically limited.

Further, a holding portion 8 that holds an outer peripheral portion 10 </ b> A of a wire mesh 10 described later is formed on the inner wall of the frame 4. The holding portion 8 is provided below the position of the valve body 5 in the normal state, that is, on the heat sensitive member 6 side. The holding portion 8 is a notch provided in a circular shape along the horizontal direction on the inner wall of the frame 4, and the outer peripheral portion 10 </ b> A of the wire mesh 10 is press-fitted or fitted into the notch and is locked.

The holding unit 8 only needs to be able to hold the wire mesh 10 during operation, and may move from a normal position. For example, the holding unit 8 may be configured as follows. When the frame 4 has a substantially triangular pyramid shape having a straight portion connected to the head body 2 and a tapered portion that is reduced in diameter below the straight portion, the boundary between the straight portion and the tapered portion may be used as the holding portion 8. . In normal times, the outer peripheral portion 10A of the wire mesh 10 is held by the elastic force of the wire mesh 10 on the inner wall of the straight portion above the boundary. That is, since the outer peripheral portion 10A of the wire mesh 10 is not fixed to the frame 4, the wire mesh 10 is lowered during operation, but the wire mesh 10 is stopped by the straight portion of the frame 4 and the tapered portion that is reduced in diameter downward. It is held there. In operation, the wire mesh 10 is inverted by the water discharge pressure of the foam aqueous solution discharged from the water discharge port 3, but has a hardness sufficient to maintain the inverted state.

Reference numeral 5 denotes a valve body having a flange portion 5B below the head portion 5A. The valve body 5 always seals the water outlet 3. 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 a set screw provided at a place where each arm of the frame 4 is joined at the lower part of the frame 4 (frame bottom). It is. The glass bulb 6 is formed longer than the vertical length from the lower end of the inner wall of the frame 4 to the height of the holding portion 8.

A plurality of air intakes 9 are provided on the flange portion 2A of the head main body 2, and the outside of the closed type foam head 1 communicates with the inside of the frame 4. When the foam aqueous solution is discharged from the water outlet 3, air is taken in from the air intake 9 and foamed.

A wire mesh 10 has a donut shape, and has an opening for holding the valve body 5 at the center. The outer diameter of the metal mesh 10 is preferably longer than the inner diameter of the frame 4, but the outer diameter of the metal mesh 10 may be longer than the diameter of the holding portion 8 formed in a circle along the horizontal direction on the inner wall of the frame 4. The inner diameter of the opening at the center of the wire mesh 10 is substantially the same as the outer diameter of the flange portion 5B of the valve body 5. The wire mesh 10 before the operation is provided in the frame 4 with the center side convex upward, and is warped by the water discharge pressure of the foam aqueous solution discharged from the water discharge port 3 so that the center side protrudes downward. It has reversible hardness so as to be in a shape.

The outer peripheral portion 10A of the wire net 10 is held by the holding portion 8 of the frame 4, and the outer peripheral portion 10A continues to be held by the holding portion 8 even after the valve body 5 is lowered. The inner peripheral portion 10B of the wire mesh 10 is connected to and held by the flange portion 5B of the valve body 5. For example, the inner peripheral portion 10B of the wire mesh 10 and the flange portion 5B of the valve body 5 are, for example, The lower part of the flange part 5B is caulked and combined. And even after the valve body 5 is lowered, the inner peripheral portion 10B continues to hold the flange portion 5B.

The holding portion 8 that holds the outer peripheral portion 10 </ b> A of the wire mesh 10 is located above the frame 4 and is located above the water spout 7 of the frame 4. Further, the flange portion 5B of the valve body 5 connected to the inner peripheral portion 10B of the wire mesh 10 is at a higher position in the vertical direction than the holding portion 8 in a normal state. Therefore, at the normal time, the water spout 7 is not blocked by the wire mesh 10. Further, during operation, the flange portion 5 </ b> B descends to a position lower than the holding portion 8, and the discharged foam aqueous solution collides with the valve body 5 and the wire net 10, and then is discharged from the water spout 7. More specifically, the length of the wire mesh 10 is set so that the position of the valve body 5 during operation remains at a position above the lower end of the water spout 7.

Next, the operation of the sprinkler head in the present invention during a fire will be described with reference to 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. At this time, the glass bulb 6 is provided in the frame 4, but since the water spout 7 is somewhat larger than the glass bulb 6, the hot air flow is easy to hit. When the glass bulb 6 is ruptured, the ruptured pieces of the glass bulb 6 are dropped from the water spout 7 formed larger than the width of the glass bulb 6. Therefore, no fragments of the glass bulb 6 remain in the frame 4 and the watering is not hindered.

Then, the valve body 5 supported by the glass valve 6 is lowered. When the valve body 5 is lowered to the height of the holding portion 8 in the frame 4, the warping of the wire mesh 10 is reversed. Thereafter, the valve body 5 is lowered by the amount that the wire mesh 10 is inverted and lowered. Since the outer peripheral portion 10A of the wire mesh 10 is held by the holding portion 8 of the frame 4, and the inner peripheral portion 10B of the wire mesh 10 holds the flange portion 5B of the valve body 5, the valve body 5 is positioned in the space in the frame 4. To do. As described above, the valve body 5 is provided in the opening at the center of the wire mesh 10 and is held by the inner peripheral portion 10B of the wire mesh 10, and the outer peripheral portion 10A of the wire mesh 10 is held by the holding portion 8 on the inner wall of the frame 4. Therefore, after the glass bulb 6 is ruptured, the valve body 5 is lowered to a predetermined position by the wire mesh 10. Therefore, it is not necessary to provide a guide member for lowering the valve body 5.

When the valve body 5 is opened, the aqueous foam solution is discharged from the water outlet 3. The foam aqueous solution entrains the air taken in from the air intake 9 and collides with the wire mesh 10 to foam.

As described above, the present invention is a so-called multi-type head in which the frame 4 constituting the closed-type foam head 1 is conical or cylindrical, and the water spout 7 is provided on the peripheral surface. Therefore, the glass bulb 6 supporting the valve body 5 inside the frame 4 is not exposed to the outside and is not easily affected by external force, so that the glass bulb 6 can be prevented from being broken by the external force. Further, the appearance is improved by using a multi-type head as compared with the frame-type head.

In the present embodiment, the wire mesh 10 has a cross-sectional shape as described above, but the shape of the wire mesh 10 is not limited to this. The wire mesh 10 may be a flat plate extending horizontally. In this case, the wire mesh 10 has an opening through which the glass bulb 6 is inserted at the center. Then, the outer peripheral portion 10A of the wire net 10 is provided at a position above the water spout 7 of the frame 4 and is held by the holding portion 8 on the inner wall of the frame 4. The valve body 5 is not connected to the wire mesh 10 and stops the water outlet 3. In operation, when the glass bulb 6 is ruptured, the valve body 5 is lowered and seated on the central portion of the wire mesh 10. In this case, a guide member for guiding the lowering of the valve body 5 may be provided on the lower surface of the valve body 5. Even if the shape of the wire mesh 10 is set in this way, the closed bubble head 1 can be formed which can protect the glass bulb 6 from external force.

DESCRIPTION OF SYMBOLS 1 Closed-type foam head, 2 Head main body, 2A flange part, 3 Water discharge port, 4 Frame, 5 Valve body, 5A Head, 5B Flange part, 6 Thermal member (glass valve), 7 Sprinkling port, 8 Holding part, 9 Air intake, 10 wire mesh, 10A outer periphery, 10B inner periphery.

Claims (3)

A head main body having a water outlet formed therein, a cylindrical frame connected to a lower portion of the head main body and having a water spray port formed on the outer periphery thereof, and provided in the frame, the water outlet is normally sealed. A closed-type foam head including a valve body that stops and descends in the event of a fire, and a heat-sensitive member that is provided in the frame and supports the valve body ,
The wire mesh with openings in Chuo provided within said frame,
A holding portion for holding the outer periphery of the wire mesh is provided on the inner wall of the frame,
The length of the heat sensitive member is formed longer than the length in the vertical direction from the lower end of the inner wall of the frame to the height of the holding portion,
A closed-type foam head, wherein a valve body is held in the opening or the heat-sensitive member is inserted. 2. The closure according to claim 1 , wherein the wire mesh is provided in a convex shape toward the water outlet before operation, and is inverted by the discharge pressure of the fire water discharged from the water outlet after the operation. Mold foam head. The frame includes a straight portion connected to the head body and a tapered portion having a diameter reduced below the straight portion, and a boundary between the straight portion and the tapered portion serves as the holding portion. Item 3. A closed-type foam head according to item 1 or 2.

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