JPH0626910U - Flash type sprinkler head - Google Patents

Abstract

(57) [Summary] [Purpose] In a flash-type sprinkler head in which a deflector and a valve body are rotatably fitted together, the deflector and the valve body are concentrically arranged so that the deflector is activated when the flash-type sprinkler head operates. Be sure to drop to the specified position and spray the fire-extinguishing liquid normally. [Structure] Protrusion 22 and deflector 3 on the lower surface of valve body 20
The center hole 37 of No. 1 has a centering structure. In the centering structure, the protrusion on the lower surface of the valve body is made into a conical shape so that the center hole of the deflector is shaped like a mortar, or the protrusion on the lower surface of the valve body is shaped like a trumpet.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flash type sprinkler head for extinguishing a fire, and more particularly to a flash type sprinkler head in which a valve body and a deflector are rotatably fitted.

[0002]

[Prior art]

 To assemble the flash type sprinkler head, engage the disassembled part with the inner flange of the frame, place the deflector on the disassembled part via the pressure plate, and then mount the valve body integrated with the deflector on the main body. Screw the frame onto the main body while pressing it against the valve seat.

The valve body has a soft copper packing adhered to the valve body in order to improve the sealing condition with the valve seat. When the frame and the main body are screwed together, the valve seat bites into the packing to prevent the extinguishing liquid from leaking. When assembling the flash type sprinkler head, that is, when the valve body rotates together with the frame when screwing the frame into the main body, the packing is damaged by the valve seat and the fire extinguishing liquid leaks. It will be

Further, in a flash type sprinkler head (refer to Japanese Patent Publication No. 58-36985) having a structure in which the deflector falls along the support, the support straddles the pressure plate and the disassembled portion, so that the deflector is screwed when the frame is screwed. If is fixed to the valve body and cannot be rotated, the column will be bent by the pressure plate and the disassembled part. In other words, in the flash type sprinkler head in which the valve body and the deflector are integrally fixed, the valve body does not rotate with the rotation of the frame because the copper packing bites into the valve body, and the support plate rotates with the frame. It may be bent at the disassembly part.

Even if a flash-type sprinkler head with bent props is activated in the event of a fire, the deflector does not fall to the bottom of the props, but stops or is tilted in the middle and spouts from the water holes in the main unit. Since the fire extinguishing liquid will not be spread normally, it will cause a serious problem that the initial fire cannot be extinguished.

When the frame is screwed, the above-mentioned problems do not occur unless the valve body rotates with the rotation of the frame. That is, even if the deflector rotates with the rotation of the frame, the valve body does not have to rotate. Therefore, a flash type sprinkler head in which a valve element and a deflector are rotatably fitted is proposed in Japanese Utility Model Publication No. 58-35266. This flash type sprinkler head has a hole formed in the center of a deflector, and a protrusion of a valve element is rotatably fitted in the hole. The valve element used here has a columnar projection with an umbrella-shaped end protruding from the center of the lower surface of the valve element. The central hole of the deflector into which the projection is fitted has a diameter larger than that of the cylinder and smaller than that of the umbrella, and the wall surface of the hole is straight, that is, vertical.

[0007]

[Problems to be solved by the device]

 By the way, in the conventional flash type sprinkler head in which the valve body and the deflector are rotatably fitted, it has been difficult to assemble the deflector and the valve body in a concentric state. If the deflector and valve body are not concentric as shown in Fig. 5, even if the valve body is installed in the normal position with respect to the valve seat, the deflector will be installed unevenly. When the deflector is biased, the deflector comes close to the inner wall of the frame, and the deflector comes into contact with the frame and tilts when the sprinkler head is activated, or it is also caught by the inner flange at the bottom of the frame and tilts. As a result, the fire-extinguishing liquid is sprayed to unnecessary places, and efficient fire extinguishing cannot be performed.

An object of the present invention is to provide a flash type sprinkler head in which a valve element and a deflector are always in a concentric state when assembled.

[0009]

[Means for Solving the Problems]

 The present inventor has conducted extensive studies on making the valve body and the deflector concentric, and as a result, completed the present invention by paying attention to the fact that when an object is placed on an inclined position, the object itself moves along the inclination. It was

According to the present invention, in a sprinkler head in which a protrusion formed in the center of the lower surface of the valve body is inserted into the center hole of the deflector, and moreover, the valve body and the deflector are rotatably fitted, It is a flash type sprinkler head characterized in that the fitting portion between the deflector and the deflector has an aligning structure.

The centering structure referred to in the present invention is a structure in which two or more circular objects are always in a concentric state. The aligning structure adopted in the present invention means, for example, that the root of the protrusion formed on the lower surface of the valve body is conical, the hole of the deflector is mortar-shaped, or the root of the protrusion on the lower surface of the valve body is trumpet-shaped. It is a structure such as.

The present invention will be described below with reference to the drawings. 1 is a front sectional view of a flash type sprinkler head of the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is an enlarged sectional view of a centering structure, and FIG. 4 is an enlarged sectional view of another centering structure.

The flash type sprinkler head is composed of a main body 10, a valve body 20, a sliding drop portion 30, a disassembled portion 40, a pressure plate 50, a spiral spring 60, and the like.

The main body 10 is provided with a water guide hole 11 in the center, an upper part is provided with an unillustrated male screw 12 for screwing with a descending pipe, and a lower end of the water guide hole is provided with a valve seat 13. Has become. A cylindrical frame 15 having a lower end serving as an inner flange 14 is screwed into the lower portion of the main body. A little above the inner flange 14, a pair of slits 16 and 16 are formed to allow the sprinkler head to have a bend. Further, a large number of grooves 17 for holding a sealing plate (not shown) are engraved on the outer periphery of the frame.

The valve body 20 closes the valve seat 13. A packing 21 is attached to the upper portion of the valve body 20, and the lower surface of the valve body 20 is a protrusion 22 whose tip is spread like an umbrella. As shown in FIGS. 1 and 3, the protrusion has a conical shape in which a portion protruding from the valve body, that is, a root portion is thick and gradually becomes thinner as it goes forward.

The sliding drop portion 30 is composed of a deflector 31, a plurality of sliding rods 32, 32, 32 and a guide ring 33. The deflector 31 is circular and has a plurality of blades 34 ... Formed on the outer periphery, and a plurality of sliding holes 35, 35, 35 are formed on the inner periphery of the deflector 31. The sliding rod is inserted. A locking piece 36 is installed at the lower end of the sliding rod 32, and the upper end is fixed to the guide ring 33.

Further, the deflector has a hole 37 formed in the center thereof, and the protrusion 22 of the valve body is inserted into the hole. The hole 37 has a mortar shape as shown in FIG. 3, and the diameter of the hole is the same as or slightly smaller than the root of the protrusion. Therefore, the valve body protrusion does not come out of the deflector hole, and the deflector moves along the inclined protrusion of the valve body, so that the deflector and the valve body are concentric.

FIG. 4 shows another centering structure used in the flash type sprinkler head of the present invention. In this centering structure, the root of the protrusion 22 of the valve body 20 is a trumpet shape. Also in this structure, the deflector moves along the protrusion of the valve body, and the deflector and the valve body are concentric.

In the disassembled portion 40, the two levers 41, 41 are engaged with the inner flange 14 of the frame 15 and also with the heat sensitive body 42, and the valve body 20 is connected via the pressure plate 50. Is pressing. The structure of the disassembled part is well known, and since it is not related to the gist of the present invention, detailed description thereof will be omitted.

The heat collecting cover 43 is installed on the heat sensitive body 42. This has the effect of collecting heat to the heat-sensitive body, the effect of blinding the inside of the sprinkler head, and the effect of preventing dust from entering the inside.

The pressure plate 50 has four legs 52, and serves as an intermediary for transmitting the pressing force from the disassembly portion 40 to the valve body 20.

Reference numeral 60 denotes a spiral spring having a thin upper part and a thicker lower part. The upper part is installed around the valve seat of the main body, and the lower part is placed on the sliding ring 33 to cause a fire. At this time, the sliding force of the sliding member is surely slid and dropped due to the bending force.

Next, the assembly of the flash type sprinkler head of the present invention will be described. Assembling the valve body and the deflector, a hole is formed in the center of the deflector so that the protrusion of the valve body can be passed through. Then, after passing the umbrella portion of the protrusion through this hole, caulk the periphery of the hole of the deflector to the extent that the umbrella portion does not come out, and reduce the diameter of the hole. Then, the protrusion is caught in the hole and cannot be removed, but the caulked hole is not so small as to push the protrusion, and therefore the valve body and the deflector are rotatably fitted.

The assembly of the flash type sprinkler head engages the two levers 41, 41 of the pre-assembled disassembly part 40 with the inner flange 14 of the frame 15. Then, the pressure plate 50 is placed on the upper end of the lever, and the valve body 20 in which the deflector is rotatably fitted is placed on the pressure plate. At this time, the lower end of the valve body projection 22 is in a pivoted state on the pressure plate.

Then, the main body 10 and the frame 15 are screwed together with an appropriate force, and this force is applied from the two levers engaged with the inner flange of the frame to the valve body projection via the pressure plate and to the valve body. Presses the valve seat to prevent leakage of the extinguishing liquid in the nozzle.

When the main body and the frame are screwed together, the valve body projection and the pressure plate are in a pivot state, so this is used as a contact point for rotation, and the valve body and the pressure plate are integrated with the frame. The valve body and the deflector never rotate as a unit. Further, since the valve body and the deflector are fitted in a concentric state, the deflector is always located concentrically with respect to the frame, that is, in the center of the frame.

In the embodiment of the present invention, the flash type sprinkler head having a structure in which the deflector falls along the sliding rod is shown. However, the present invention is not limited to this structure, and the deflector has a constant distance when a fire occurs. It goes without saying that it can be applied to any structure as long as it only drops.

[0028]

[Effect of device]

 In the flash type sprinkler head of the present invention, since the deflector is always located in the center of the frame, even if the sprinkler head operates due to a fire, the deflector may come into contact with the frame or catch on the inner flange of the frame. It slides down to a predetermined position without tilting. Therefore, the flash type sprinkler head of the present invention has an excellent effect that the fire-extinguishing liquid ejected from the water guide hole is uniformly dispersed in a predetermined range to effectively extinguish the fire.

[Brief description of drawings]

FIG. 1 is a front sectional view of a flash type sprinkler head of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is an enlarged cross-sectional view of a centering structure used in the flash type sprinkler head of the present invention.

FIG. 4 is an enlarged cross-sectional view of another centering structure used in the flash type sprinkler head of the present invention.

FIG. 5 is an enlarged sectional view of an essential part of a conventional flash type sprinkler head.

[Explanation of symbols]

 10 Main body 20 Valve body 22 Protrusion 31 Deflector 37 Deflector center hole

Claims (3)

[Scope of utility model registration request] 1. A sprinkler head in which a projection formed in the center of the lower surface of a valve body is inserted into a center hole of a deflector, and further, the valve body and the deflector are rotatably fitted to each other. A flash-type sprinkler head, characterized in that the fitting part of is a centering structure. 2. The flash type sprinkler head according to claim 1, wherein in the centering structure, the root of the protrusion is conical and the center hole of the deflector is mortar-shaped. 3. The flash type sprinkler head according to claim 1, wherein the center of the protrusion has a trumpet shape at the base thereof.