JP2019170479A - Sprinkler head - Google Patents

Abstract

To provide a sprinkler head capable of preventing lodgment when a side wall type sprinkler head is operated.SOLUTION: A sprinkler head includes: a body 1 having a nozzle 12 connected to a water supply pipe inside; a valve 3 that closes the nozzle 12 normally; a pair of frames 14 extending in a water discharge direction of the nozzle 12 from the body 1; a main deflector 21 installed at a tip of the frame 14; a thermosensitive decomposition part 4 installed between the valve 3 and the main deflector 21; and an auxiliary deflector 22 installed substantially in parallel with a nozzle center axis A and a virtual plane B passing through the frame 14, and separated from the virtual plane B. A hanger 5 being close to or in contact with the frame 14 is installed in a space opposite to a space where the auxiliary deflector 22 is installed with respect to the virtual space B.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fire extinguishing sprinkler head.

  The sprinkler equipment is installed in the building and senses the heat of the fire and automatically operates to fire and extinguish water. The sprinkler head has a nozzle inside, and the nozzle is connected to a pipe following the water supply source, and the nozzle is normally closed. When a fire occurs and the sprinkler head is activated by heat, the nozzle is opened, and the water filled in the pipe is discharged from the nozzle. The sprinkler head is equipped with a deflector that scatters water in all directions on the extension of the nozzle outlet, and the water that collides with the deflector is sprayed over a predetermined range to suppress and extinguish the fire.

  As an example of the configuration of the sprinkler head, there is a frame type sprinkler head. The frame-type sprinkler head has a horseshoe-shaped frame installed in the direction of water discharge of the main body having a nozzle inside, and a deflector that collides water discharged from the nozzle and scatters it in all directions at the tip of the frame. .

  A valve that closes the nozzle at all times is installed between the nozzle and the deflector, and the valve is supported by the thermal decomposition unit. A thermal decomposition part using a glass bulb or a low melting point alloy is widely known. When the thermal decomposition unit is operated by the heat of the fire, a phenomenon (lodgement) in which the components and valves of the thermal decomposition unit are moored to the deflector by the water flow of the nozzle rarely occurs.

  In order to prevent lodgement, there is a sprinkler head with a spring installed to bias the valve away from the water flow direction. (For example, refer to Patent Document 1).

  In the side wall type sprinkler head (see, for example, Patent Document 2), an auxiliary deflector having a plane substantially parallel to the central axis of the nozzle is installed together with the deflector. When the sprinkler head is actuated, there is rarely a case where a component or valve of the thermal decomposition section is caught in a gap between the deflector and the auxiliary deflector to form a lodgement.

JP 2006-346497 A US Pat. No. 5,727,737

In view of the above problems, an object of the present invention is to provide a sprinkler head capable of preventing a lodgement during operation of the side wall type sprinkler head.

In order to achieve the above object, the present invention provides the following sprinkler head.
That is, a main body internally provided with a nozzle connected to a water supply pipe, a valve that normally closes the nozzle, a pair of frames extending from the main body in the direction of water discharge of the nozzle, and a main deflector installed at the tip of the frame And a thermal decomposition part installed between the valve and the main deflector, and an auxiliary deflector which is substantially parallel to the virtual plane passing through the center axis of the nozzle and the frame and spaced apart from the virtual plane. This is a sprinkler head in which a hanger close to or in contact with the frame is installed in a space opposite to the space where the auxiliary deflector is installed with respect to the virtual plane.

  By installing the hanger in the space opposite to the space where the auxiliary deflector is installed with respect to the virtual plane, the hanger collides with the frame when the valve moves due to the water flow discharged from the nozzle when the sprinkler head is activated. Can be removed in a direction away from the virtual plane. As a result, the valve moves in a direction away from the auxiliary deflector, so that a lodgement in which the valve is moored in the gap between the main deflector and the auxiliary deflector can be prevented.

  The hanger has an annular engaging portion that engages with the outer peripheral portion of the valve, and a guide portion that extends from the engaging portion to the frame side. The guide part is installed close to or in contact with the frame. The hanger can be formed integrally with the valve. Moreover, you may comprise an engagement part in the C shape which a part lacked.

  Further, the hanger has elasticity, both ends of the guide portion bent in a substantially W shape are engaged with a pair of frames, and the valve body is placed inside the engaging portion installed between the both ends. It can be configured to accommodate. As a result, the lodgement can be prevented by dropping the valve away from the virtual plane due to the elasticity of the hanger when the sprinkler head is operated.

Furthermore, if the thermal decomposition unit is placed in a space opposite to the space where the auxiliary deflector is installed with respect to the virtual plane, the components of the thermal decomposition unit will drop off in the direction away from the virtual plane when the sprinkler head is activated. Can be prevented.

As described above, according to the present invention, it is possible to prevent the occurrence of a lodge in which a component of a valve or a thermal decomposition part is moored to the deflector when the side wall type sprinkler head is operated.

The top view of the state by which the sprinkler head of this invention was installed in the wall surface. The perspective view of the sprinkler head of this invention. The front view of the sprinkler head of FIG. IV-IV sectional drawing of FIG. The expanded sectional view of a thermal decomposition part. (A) is a front view of a hanger, (b) is VI-VI sectional drawing shown in FIG. (C) The front view of the modification of a hanger, (b) is VI-VI sectional drawing shown in FIG.

  The sprinkler head S1 of the present invention includes a main body 1, a deflector 2, a valve 3, a thermal decomposition unit 4, and a hanger 5.

  The sprinkler head S1 is a side wall type sprinkler head, and is installed on the wall surface W as shown in FIG. The sprinkler head S1 has a rectangular protection area E, and water is sprayed in the protection area E evenly.

  The main body 1 has a hollow shape, and a male screw 11 for connecting to a pipe arranged near or inside the wall surface of the building is provided outside, and the inside is a nozzle 12. The size of the nozzle 12 is such that the K factor value derived from the flow rate of the nozzle 12 and the discharge pressure is in the range of 3 to 5.8, and in this embodiment, the K factor value is 5.6. The size of the male screw 11 connected to the pipe is NPT1 / 2 or R1 / 2.

  Near the outlet of the nozzle 12, a substantially rectangular base 13 is installed, and a pair of frames 14 extending from the base 13 in the water discharge direction of the nozzle 12 are installed. The frame 14 has a straight portion 14A (first arm) extending substantially parallel to the central axis A of the nozzle, and an intersecting portion connected to the boss 15 installed on the central axis A of the nozzle 12 from the end of the straight portion 14A. 14B (second arm). As shown in FIG. 5, the crossing portion 14B is thinner than the straight portion 14A, and the cross-sectional shape is elliptical.

  The boss 15 has a cylindrical shape with a taper, and the deflector 2 is installed at the tip thereof. The diameter D1 of the boss 15 on the side in contact with the deflector 2 is 9 to 10 mm. The outer peripheral diameter of the end of the boss 15 on the nozzle 12 side is smaller than the diameter D1 on the deflector 2 side. The outer peripheral end 15A on the nozzle 12 side of the boss 15 has a curved surface shape, and the radius of the curved surface is in the range of 1 mm to 3 mm, and in this embodiment is 2 mm.

  A female screw 15B is installed inside the boss 15, and an impress screw 16 is screwed therein. The tip 16A of the impress screw 16 is pointed and has a slope 16B. The tip 16A faces the nozzle 12, and the angle α of the inclined surface 16B is in the range of 80 ° to 100 °, and is 90 ° in this embodiment. The apex of the tip 16A has a spherical shape, and the spherical radius is preferably 2 mm or less, and is 1 mm or less in this embodiment.

  The impress screw 16 has a function of pressing the valve 3 toward the nozzle 12 via the thermal decomposition unit 4. In FIG. 5, the extension line 16C along the inclined surface 16B of the tip 16A of the impress screw 16 is close to or in contact with the curved surface of the outer peripheral end 15A of the boss 15, and the water flowing along the surface of the tip 16A is at the outer peripheral end. When passing through 15A, the flow is not hindered and the occurrence of turbulence is prevented. At this time, the distance a between the inclined surface 16B of the impress screw 16 and the end face on the nozzle 12 side of the boss 15 is 2 mm or less, more preferably 1 mm or less. If the interval increases beyond this, the possibility of turbulent flow increases.

  The deflector 2 shown in FIGS. 2 to 4 includes a main deflector 21 that intersects the central axis A of the nozzle and an auxiliary deflector 22 that is installed in the vicinity of the main deflector 21. The main deflector 21 is installed at the tip of the boss 15 and has a substantially disk shape. A plurality of slits 21 </ b> A and protrusions 21 </ b> B are formed on the periphery of the main deflector 21.

  The auxiliary deflector 22 is provided in the vicinity of the main deflector 21 and includes a rectangular plane 22A that is substantially parallel to the central axis A of the nozzle. The auxiliary deflector 22 is installed so as to be substantially parallel to the virtual plane B passing through the center axis A of the nozzle and the pair of frames 14 or inclined upward by several degrees from the virtual plane B, and further away from the virtual plane B. is set up.

  The main deflector 21 has an extended portion 21 </ b> C longer than the protrusion 21 </ b> B on the virtual plane B. The extension portion 21 </ b> C is continuous with the curved portion 23 connected to the auxiliary deflector 22, and connects the main deflector 21 and the auxiliary deflector 22. The curved portion 23 is bent from the main deflector 21 toward the nozzle 12 as shown in FIG. A plane 22 </ b> A of the auxiliary deflector 22 intersects with an extension of the plane of the main deflector 21, and water discharged from the nozzle 12 is supplied to the auxiliary deflector 22 between the main deflector 21 and the auxiliary deflector 22. A gap 24 is formed.

  In the figure, the flowing water above the virtual plane B collides with the main deflector 21. The water flowing along the protrusion 21B is diffused away from the central axis A of the nozzle and guided toward the auxiliary deflector 22. Water reaches the auxiliary deflector 22 through the gap 24, flows along the plane 22A, and is sprayed on the portion E1 away from the sprinkler head S1 in the protection area E.

  On the other hand, the water flow below the imaginary plane B reaches the main deflector 21 and is diffused away from the central axis A of the nozzle by the slits 21A and the fins 21C between the slits 21A and sprinkler head S1 in the protection area E. It is sprayed on the part of E2 near.

  The valve 3 closes the outlet of the nozzle 12 during normal times. The valve 3 includes a valve cap 31, a disk 32, and a disc spring 33. The valve cap 31 has a bottomed cylindrical shape, and one end side is a spherical bottom portion 31A. The other end is enlarged in diameter, and a step 31B is provided.

  A disk-shaped disk 32 is placed on the inner peripheral side of the step 31B. The disk 32 has a recess 32 </ b> A at the center, and the recess 32 </ b> A is engaged with one end of the column 42 of the thermal decomposition unit 3.

  A disc spring 33 is locked to the outer peripheral side of the step 31B. The disc spring 33 is inserted from the bottom 31 </ b> A of the valve cap 31. The surface of the disc spring 33 is covered with a fluororesin. The outer peripheral edge of the disc spring 33 is disposed at the outlet end of the nozzle 12, and the disc spring 33 is pressed through the thermal decomposition portion 4 when the impress screw 16 is screwed into the female screw 15B of the boss 15, and is crushed by elastic deformation. Become. At that time, the fluororesin serves as a sealing material to seal the nozzle 12.

  The thermal decomposition unit 4 includes a link 41, a support 42, and a lever 43. The link 41 is a heat sensitive body that operates by the heat of fire, and is formed by joining two thin metal plates 44 with a low melting point alloy. A low melting point alloy having a melting point in the range of 60 to 200 ° C. is used, and a low melting point alloy having a melting point of 72 ° C. or 96 ° C. is generally used.

  The two metal plates 44 having a substantially square shape have a hole 45 at one end, and a U-shaped lacking portion 46 is provided at the other end. The two metal plates 44 are joined by a low melting point alloy. At that time, the lacking portion 46 of the other metal plate 44 is superimposed on the position of the hole 45 of one metal plate 44. The support column 42 and the lever 43 are inserted through the two holes 45 of the link 41 after joining (see FIG. 5).

  The support 42 has a strip shape, and one end is engaged with the disk 32 of the valve 3 installed at the outlet of the nozzle 12, and the other end is engaged with the tip of the lever 43. As described above, the support column 42 is inserted into the hole 45 of the link 41. A protrusion 47 is provided in the middle of the column 42, and the link 41 is locked in a groove 47 </ b> A provided in the vicinity of the protrusion 47.

  The lever 43 is formed by bending an elongated plate into a substantially L shape. As described above, one end side of the lever 43 is inserted into the hole 45 of the link 41. The other end side of the lever 43 is engaged with the column 42, and a groove 48 in which the tip of the column 42 is engaged is provided in the lever 43.

  A recess 49 is provided on the back surface of the surface on which the groove 48 is provided. The recessed portion 49 is installed at the other end of the lever 43 rather than the groove 48. The impress screw 16 is in contact with the recess 49. When the tip of the impress screw 16 presses the concave portion 49 of the lever 43, a rotating force acts on the lever 43 around the groove 48 where the support column 42 is locked. However, a hole 45 of the link 41 is inserted into one end side of the lever 43 to prevent the lever 43 from rotating. Thereby, the link 41, the support | pillar 42, and the lever 43 which comprise the thermal decomposition part 4 are maintaining the engagement state. Further, the impress screw 16 presses and holds the valve 3 toward the nozzle 12 via the thermal decomposition unit 4.

  As shown in FIG. 4, the thermal decomposition unit 4 is arranged in a space opposite to the space where the auxiliary deflector 22 is installed with respect to the virtual plane B. In particular, the lever 43 is greatly displaced in the direction of separating the link 41 when the sprinkler head S1 is operated, so that the lever 43 is disposed in a space opposite to the space where the auxiliary deflector 22 is installed. By doing so, when the sprinkler head S1 is operated, the link 41, the column 42, and the lever 43 are released in a direction away from the auxiliary deflector 22, and these components are locked in the gap 24 between the main deflector 21 and the auxiliary deflector 22. Can be prevented.

  Further, in the sprinkler head S1 configured as described above, the auxiliary deflector 22 is disposed on the ceiling side, and the thermal decomposition unit 4 is disposed on the floor surface side. When the thermal decomposition unit 4 is decomposed during the operation of the sprinkler head S1, the components of the thermal decomposition unit 4 drop off to the floor surface due to the water discharge from the nozzle 12 and its own weight, and thus move away from the auxiliary deflector 22.

  The hanger 5 shown in FIG. 6 has an annular engaging portion 51 and a guide portion 52 extending from the engaging portion 51 to the frame 14 side. A valve cap 31 is accommodated inside the engaging portion 51. The inner peripheral diameter of the engaging portion 51 is substantially the same as the outer peripheral diameter of the valve cap 31 on the side where the disk 32 is installed, and is smaller than the outer peripheral diameter of the flange 34 installed at the open end of the valve cap 31. The hanger 5 is incorporated into the valve cap 31 at a stage before the disc spring 33 is inserted into the valve cap 31.

  The leading end of the guide portion 52 is disposed in the vicinity of the frame 14 and is disposed in a space opposite to the space where the auxiliary deflector 22 is disposed with respect to the virtual plane B. When the sprinkler head S1 is operated, the guide portion 52 moves along the frame 14 so that the hanger 5 and the valve 3 do not move above the frame 14 in the drawing. This prevents the lodgement in which the valve 3 is locked in the gap 24 of the deflector 2.

  Next, the operation of the sprinkler head S1 during a fire will be described.

  The sprinkler head S1 shown in FIG. 1 is always connected with a pipe (not shown) and a male screw 11. The nozzle 12 is filled with pressurized water, but the nozzle 12 is closed by the valve 3 and the thermal decomposition unit 4.

  When a fire occurs and the low melting point alloy of the link 41 is melted, the lever 43 rotates and the metal plate 44 engaged with the lever 43 is peeled off from the metal plate 44 engaged with the support column 42. As a result, the engaged state of the thermal decomposition unit 4 is released, the link 41, the support column 42, and the lever 43 are disengaged, and the valve 3 supported by the support column 42 is detached from the nozzle 12 and the nozzle 12 is opened. Is done.

  At this time, the valve 3 and the hanger 5 move due to the water flow discharged from the nozzle 12, but the guide portion 52 moves while being in contact with or close to the frame 14, and is discharged to the outside of the sprinkler head S1. Or the guide part 52 collides with the flame | frame 14 with the force of a water flow, bounces off, and is discharge | released outside the sprinkler head S1.

  The water discharged from the nozzle 12 collides with the main deflector 21 and is sprayed on the portion E2 in the vicinity of the sprinkler head S1. Further, the water that has passed through the gap 24 and reached the auxiliary deflector 22 flows along the plane 22A of the auxiliary deflector 22 and is accelerated, and is sprayed on a portion E1 that is away from the sprinkler head S1.

  A modification of the hanger is shown in FIG. The hanger 6 of FIG. 7 is comprised from the wire which has elasticity. The hanger 6 is bent in a substantially W shape, and both ends 61 and 61 function as guide portions and engage with the pair of frames 14. The valve 3 is accommodated inside the bending portion 62 that functions as an engaging portion in the intermediate portion. The bending portion 62 has an opening 63 through which the valve cap 31 can be inserted into the bending portion 62.

  The space | interval of the ends 61 and 61 is wider than the space | interval of a pair of flame | frame 14 in the state before incorporating in the sprinkler head S1. When the hanger 6 is locked to the frame 14, the ends 61 and 61 are in a state of pressing the frame 14.

  In order to incorporate the hanger 6 into the sprinkler head S1, first, the valve 3 and the thermal decomposition unit 4 are incorporated into the main body 1 of the sprinkler head S1. Thereafter, the hanger 6 is locked to the frame 14 and the valve cap 31 is accommodated inside the curved portion 62. The hanger 6 passes between the link 41 and the valve 3 and moves in the direction indicated by the arrow D in FIG. 7B (perpendicular to the central axis A of the nozzle) so that the opening 63 and the support 42 face each other. Move. The ends 61 and 61 that interfere with the frame 14 are elastically deformed so that the ends 61 and 61 approach each other, and the opening 63 of the bending portion 62 expands.

  When the hanger 6 is further moved in the arrow D direction, the valve cap 31 passes through the opening 63 and is accommodated in the bending portion 62. When the hanger 6 is released in this state, both ends 61 and 61 of the hanger 6 are locked to the frame 14, the valve cap 31 is held inside the curved portion 62, and the hanger 6 is attached to the sprinkler head S1. Complete.

  Since the hanger 6 is urged by the end 61 in the direction opposite to the direction indicated by the arrow D, when the sprinkler head S1 is operated, the hanger 6 keeps the valve 3 inside the curved portion 62 and the nozzle. By the water flow discharged from 12, it flows in the direction away from the frame 14 and is discharged to the outside of the sprinkler head S1.

  As mentioned above, although embodiment of this invention was described, the structure and effect | action other than this are described below.

The guide part 52 and the valve cap 31 of the hanger 5 described above can be configured integrally. In addition, the engaging portion 51 has an annular shape, but if a missing portion is provided except between the broken lines 53 and 53 shown in FIG. 6A, the valve 3 and the thermal decomposition portion 4 are incorporated into the sprinkler head S1. At this stage, the hanger 5 can be installed on the valve 3. Furthermore, even if the thermal decomposition part 4 is constituted by a glass bulb, the same effect as described above can be obtained.

1 body
2 Deflector
3 Valve
4 Thermal decomposition part
5, 6 Hanger
12 nozzles
14 frames
15 Boss
21 Main deflector
21A slit
21B Protrusion
21C extension
21D Fin
22 Auxiliary deflector
23 Curved part
24 Clearance
31 Valve cap
32 discs
33 disc spring
41 links
42 props
43 Lever
51 engaging part
52 Guide part
61 end
62 Curved part
A Nozzle center axis
B Virtual plane

Claims (9)

A main body internally provided with a nozzle connected to the water supply pipe;
A valve that normally closes the nozzle;
A pair of frames extending from the body in the direction of water discharge of the nozzle,
A main deflector installed at the end of the frame;
A thermal decomposition part installed between the valve and the main deflector;
It is substantially parallel to a virtual plane passing through the nozzle central axis and the frame, and includes an auxiliary deflector installed apart from the virtual plane,
A sprinkler head, characterized in that a hanger close to or in contact with the frame is installed in a space opposite to the space where the auxiliary deflector is installed with respect to the virtual plane. 2. The sprinkler head according to claim 1, wherein the hanger has an annular engaging portion that engages with an outer peripheral portion of the valve, and a guide portion that extends from the engaging portion toward the frame. The sprinkler head according to claim 1 or 2, wherein the hanger is formed integrally with the valve. The sprinkler head according to claim 1 or 2, wherein the engaging portion has a C-shape that is partially missing. The hanger has elasticity, and both ends of the guide portion bent in a substantially W shape are engaged with the pair of frames, and the valve body is accommodated inside the engaging portion provided between the both ends. The sprinkler head according to any one of claims 1 to 4. The sprinkler head according to any one of claims 1 to 5, wherein the thermal decomposition part uses a link in which a plurality of thin plates are joined with a low melting point alloy, and includes a support column and a lever that are engaged with the link. The sprinkler head according to claim 6, wherein the lever is disposed in a space opposite to the space where the auxiliary deflector is installed with respect to the virtual plane. The sprinkler head according to any one of claims 1 to 5, wherein a glass bulb is used as the thermal decomposition portion. The valve has a cylindrical shape with a bottom, the bottom side of the valve is accommodated in the nozzle, one end of the thermal decomposition part is engaged with the opening side, and the opening side of the valve is accommodated inside the curved part of the spring The sprinkler head according to any one of claims 1 to 8.

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