JP3928105B2 - Sprinkler head fitting - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sprinkler head fixture connected to a fire extinguishing pipe.
[0002]
[Prior art]
The closed-type sprinkler head includes a valve body that closes the water outlet, a heat-sensitive part that presses the valve body to support the valve in a normally closed state, releases the pressure by heat and opens the valve in the event of a fire, and the water outlet And a sprinkler for dispersing the fire-fighting water supplied from the water.
This head is usually disposed in a hot air flow path near the lower surface of the ceiling so that the heat sensitive part can sense heat generated at the time of fire early.
[0003]
However, when there is an obstacle such as a duct in the vicinity of the lower surface of the ceiling, if the head is disposed in the hot air flow passage, the obstacle becomes an obstacle during watering, and water cannot be sprayed as designed. Accordingly, the head is installed below the obstacle to prevent the occurrence of watering trouble, and a heat collecting plate is provided immediately above the head to improve heat collection.
[0004]
In the conventional example, since the head is positioned below the hot air flow path near the ceiling lower surface, when a fire occurs, the hot air flows upward from the head.
Therefore, only the hot air flow of the fire directly under the head can be collected, and even if a heat collecting plate is attached, heat collection cannot be improved, so the operation of the head is greatly delayed, and effective fire extinguishing is It becomes difficult. In addition, since the heat collecting plate is exposed, it becomes unsightly and aesthetically undesirable.
[0005]
Therefore, in order to solve this problem, a tubular main body having a pipe connection port at one end, a mounting port for a heat sensitive part at the other end, and a head connection port formed between both ends, a valve unit, A valve body having a valve stem portion, the valve portion blocking between the two connection ports, and a guide having a through hole inserted into the other end side and into which the rear end portion of the valve stem portion is inserted. A ball inserted into the through-hole and sandwiched between the rear end portion of the valve stem portion and the glass bulb receiver, and provided in an attachment port of the heat sensitive portion, and projecting in the moving direction of the valve stem portion. Sprinkler head mounting tool comprising: a support frame; and a glass valve that is held by the support frame, presses the valve body to be normally closed, and releases the pressing force by heat in the event of a fire. , Has been developed.
[0006]
[Problems to be solved by the invention]
In the conventional sprinkler head fixture, the valve stem and glass bulb holder are pressed against the ball by the assembly load, so that when the glass valve ruptures and the valve body moves in the event of a fire, they do not disassemble. It may move in the state of sticking to the support frame and get stuck on the support frame to obstruct the movement of the valve body.
Therefore, the valve cannot be opened sufficiently, and it becomes difficult to supply a necessary amount of fire-extinguishing water to the head, which may hinder fire-fighting activities.
[0007]
In view of the above circumstances, an object of the present invention is to enable smooth and reliable valve opening.
[0008]
[Means for Solving the Problems]
This invention has a pipe connection port at one end, a mounting port for a heat sensitive part at the other end, and a cylindrical main body formed with a head connection port between both ends, and is inserted into the other end side, A guide that restricts the movement of the valve body, a valve body that is provided in the main body and that blocks between the two connection ports, and a mounting port for the heat sensitive part, and that supports the valve body in a normally closed state. A sprinkler head mounting tool comprising a heat sensitive part that is opened by heat when a fire occurs, and an open sprinkler head provided via a head connecting pipe connected to the head connecting port ;
The valve body is formed by a valve portion that closes the pipe connection port, and a valve rod portion that is inserted into a through hole formed in the guide, and a valve rod portion that is inserted into the through hole of the guide. The diameter of the rear end portion is formed to have a diameter that can be slidably fitted into the through hole of the guide, and between the rear end portion of the valve stem portion and the valve portion facing the head connection port, It is formed in a thin rod portion having a smaller diameter than the rear end portion, and the outer diameter of the thin rod portion is smaller than the inner diameter of the through hole of the guide .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present inventor considered the cause of the difficulty of disassembling the valve stem, ball, and glass bulb holder of the valve body when a fire occurred.
(1) The valve body is always concentric with the central axis of the fixture and slides instantaneously.
[0010]
(2) The inner end surface of the glass bulb holder is in surface contact with the inner end surface of the screw hole of the support frame and is not easily dropped.
(3) The glass bulb holder and the valve stem of the valve body are in surface contact with the ball.
[0011]
Therefore, the present inventor has provided an obstacle drop assisting means for dropping off the valve body moving obstacle in the support frame when the valve is opened.
[0012]
Examples of the obstacle drop assist means include the following.
(1) The valve rod slides between the rear end portion of the valve stem portion inserted into the through hole of the guide and the valve portion with a smaller diameter than the rear end portion, and the valve body slides. When the rear end portion of the portion comes out of the through hole, the thin rod portion is brought into contact with the inner surface of the through hole to cause misalignment.
[0013]
(2) The inner end surface of the glass bulb receiver or the inner end surface of the screw hole portion of the support frame is inclined so that the glass bulb holder does not come into contact with the screw hole portion and is unstable.
(3) The rear end portion of the valve rod portion holding the ball and / or the inner end portion of the glass bulb receiver, or any one of them, is made spherical and brought into point contact with the ball.
[0014]
In addition, although a glass bulb is used as the heat sensitive member of the heat sensitive portion, it is not necessarily limited thereto, and for example, a soluble metal or a bimetal may be used.
[0015]
【Example】
Embodiments of the present invention will be described with reference to the accompanying drawings. A hot air passage 22 is located near the lower surface 20 a of the ceiling 20. The hot air flow passage 22 is a passage through which a hot air flow generated at the time of a fire passes, and is usually positioned about 10 cm below the lower surface 20a of the ceiling.
[0016]
A fire extinguishing pipe K is disposed in the hot air passage 22, and a sprinkler head F is connected to the fire extinguishing pipe K through a sprinkler head mounting tool 1 and a head connecting pipe E.
[0017]
The sprinkler head mounting tool 1 includes a cylindrical main body H. A pipe connection port A connected to the fire extinguishing pipe K is formed at the front end of the main body H, a mounting port J for the heat sensitive part D is formed at the rear end, and a head connection port B projects at the center of both ends. The main body H has a T-shape as a whole.
[0018]
A valve body C is disposed in the main body H. The valve body C is a piston-type valve body including a valve portion 3a, a valve rod portion 3b on the back surface side of the valve portion 3a, and a columnar small-diameter protrusion portion 3c on the front surface side of the valve portion 3a.
[0019]
The protruding portion 3c is provided with a disc spring 8 having a diameter larger than that of the valve portion 3a. The disc spring 8 is pressed against the valve seat 25 of the main body H to communicate between the connection ports A and B. Cut off.
Moreover, the sealing performance can be enhanced by applying Teflon coating to the disc spring 8.
[0020]
The valve stem portion 3b is a smaller diameter cylindrical body from the valve portion 3a, and its length is L _0.
The rear end 3d of the valve stem 3b is slidably fitted into the through hole 26 of the guide 4. The rear end surface 3f of the rear end portion 3d is hemispherical so as to make point contact with the ball 9. When formed in a hemispherical shape in this way, separation between the ball 9 and the rear end 3d of the valve stem portion is facilitated. The length L ₁ of the rear end portion 3 d is shorter than the length L ₂ of the through hole 26.
Between the rear end portion 3d and the valve stem portion 3b, a thin rod portion 3e having a circular cross section having a smaller diameter than the rear end portion 3d is formed. The diameter and shape of the thin rod portion 3e are appropriately selected as necessary. For example, a circular shape or a polygonal shape such as a triangle or a quadrangle is selected.
The length L ₀ of the valve stem portion 3b is selected such that the rear end portion 3d of the valve stem portion 3b does not contact the screw hole portion 2A of the support frame 2 when sliding.
[0021]
More specifically, when the valve is opened, the rear end 3d of the valve stem 3b is separated from the set screw 6 by a distance d so that the back surface of the valve 3a contacts the valve seat surface 4a of the guide valve 4. The length of the valve stem portion 3b is determined, so that when the valve is opened and the water is discharged, the water discharge is not impaired by the valve body C.
[0022]
Depending on the length of the main body H and the valve body C, the ball 9 may be unnecessary. The ball 9 serves as a spacer, thereby increasing the stroke of the valve stem portion 3b.
[0023]
A bottomed cylindrical glass bulb receiver 5 is inserted into the through hole 26 of the guide 4 of the valve body C. An inner end surface 5b of the glass bulb receiver 5 is formed in a hemispherical shape so as to make point contact with the ball 9, and an insertion hole 27 of the glass bulb 7 is provided in the outer end portion 5a. The end surface of the outer end portion 5a is formed vertically. The glass bulb receiver 5 can be omitted by making the valve rod portion 3b longer and further providing a glass valve 7 insertion hole at the rear end portion 3d. The glass bulb holder 5 and the ball 9 are examples of a valve body movement obstacle.
[0024]
As a heat sensitive member of the heat sensitive part D, a glass bulb 7 is used. The glass bulb 7 is composed of a glass tube and alcohol enclosed in the glass tube. The front end of the glass bulb 7 is inserted into the insertion hole 27 of the glass bulb receiver 5, and the rear end thereof is pressed by a set screw 6 screwed into the screw hole portion 2 </ b> A of the support frame 2.
The inner end of the screw hole portion 2A is an inclined surface 2t, and this inclined surface 2t serves as an obstacle drop assisting means. That is, when the glass bulb receiver 5 collides with the inclined surface 2t in the event of a fire, the valve receptacle 5 is made unstable and the valve body moving obstacle is easily dropped. In addition, by using the glass bulb 7 for the heat sensitive part D, the corrosion resistance can be improved.
[0025]
The frame 2 includes, for example, three support portions 2a that are screwed into the outlet J at the other end of the main body H and disposed at intervals of 120 ° in the circumferential direction.
In this way, the heat sensitive part having the shape of a so-called frame-type sprinkler head is arranged at the outlet J because the opening between the support parts 2a is large, and the ball 9 and the glass bulb receiver 5 fall from the through hole 26 in the event of a fire. This is because it is easy to do.
[0026]
The head connection port B is formed at the center of both ends of the main body H, but the position thereof can be selected as appropriate. A head coupling pipe E is connected to the head coupling port B. The length of the pipe E is such that the tip e of the reducer R provided on the head coupling pipe E is at the design arrangement position of the sprinkler head F. It is decided.
This design arrangement position is a position where watering failure due to the duct G or the like does not occur and water can be efficiently sprayed.
[0027]
An open sprinkler head F is provided at the tip of the reducer R. As this head F, for example, a head that has been installed as a closed type sprinkler head in the past and opened in a fire and brought into a state similar to an open type sprinkler head is used, and a so-called used closed type sprinkler head is opened. It can be reused as a mold sprinkler head. This head F is provided with a sprinkler 28 for dispersing a fire extinguishing agent. This watering part 28 is comprised from the deflector 29 and the cone 30 provided in the upper surface center of this deflector.
Note that an open sprinkler head may be provided from the beginning instead of the used sprinkler head.
[0028]
Next, the operation of this embodiment will be described. At all times, that is, when monitoring a fire, as shown in FIG. 1, the valve element C is pressed by the glass valve 7 of the heat sensitive part D to maintain the valve closed state, so that the fire extinguishing water W in the fire extinguishing pipe K is sprinkler head fittings. It does not flow into 1.
[0029]
When a fire occurs, the hot air current passes through the hot air flow passage 22 near the ceiling lower surface 20a and heats the glass bulb 7. Then, the alcohol of the glass bulb 7 to break the glass tube expands, the valve body C is pressed by the fire extinguishing water W, as well as open the valve slides in the arrow A ₁ direction while being restricted by the guide 4, the ball 9 and the glass bulb receiver 5 are pushed by the valve body C and are integrally pushed out from the through hole 26, and the glass bulb receptacle 5 collides with the inclined surface 2t at the inner end of the screw hole portion to be in the state of FIG. That is, the glass bulb receiver 5 collides with the inclined surface 2t at the inner end of the screw hole portion 2A and comes into line contact with each other.
[0030]
At this time, since the ball 9 is spherical, the ball 9 moves smoothly in the through hole 26, and the rear end 3 d of the valve stem portion 3 b protrudes from the through hole 26. When the glass bulb receiver 5 collides with the inclined surface 2t at the inner end of the screw hole portion 2A, at that moment, force is applied to the valve stem portion 3b in addition to the axial direction. The valve rod portion 3 b is inclined, and the thin rod portion 3 e contacts the inner surface of the through hole 26.
As a result, the central axis of the valve body C deviates from the central axis 1C of the fixture.
Then, when the valve stem portion 3b is inclined, the position of the ball 9 is also displaced from the central axis 1C and is easily separated. Further, when the valve body C is pressed in the arrow A ₁ direction, the glass bulb receiving 5 balls 9 to drop, the back surface of the valve portion 3a of the valve body C is brought into contact with the valve seat surface 4a of the guide 4, The rear end 3d stops at a position separated from the set screw 6 by a distance d, and the state shown in FIG. 3 is obtained.
[0031]
The fire-extinguishing water W flowing in from the pipe connection port A flows down in the direction of the head connection port B by the valve body C, flows down, passes through the head connection tube E, and collides with the cone 30 and the deflector 29 of the open sprinkler head F. While being dispersed, water is sprayed to a fire extinguishing area (not shown).
At this time, since water does not flow to the attachment port J side by the valve body C, the fire-extinguishing water W can be sufficiently supplied to the sprinkler 28.
[0032]
At this time, since the open-type sprinkler head F is in the design arrangement position below the duct G, the watering trouble does not occur.
[0033]
A second embodiment of the present invention will be described with reference to FIGS.
FIG. 6 is an example of a fire extinguishing facility using the sprinkler head fixture 1.
The sprinkler head mounting tool 1 has the pipe connection port A connected to the branch part 53 of the sprinkler pipe 52 so that the heat sensitive part D is exposed from the ceiling material 51.
A tubular header 54 is connected to the head connection port B, and a sprinkler head F is connected to an attachment port 55 formed on the side of the header 54 via a resin tube 56 as a flexible tube.
[0034]
The header 54 is provided with a plurality of, for example, four attachment ports 55, and the sprinkler head F is arranged around the heat sensitive part D at equal intervals from the heat sensitive part D as shown in FIG. . The operating temperature of the heat sensitive part D is set lower than the operating temperature of the sprinkler head F, for example, 68 °, and the operating temperature of the sprinkler head F is set to 72 °.
[0035]
When a fire occurs in such a fire extinguishing equipment, first, the heat-sensitive part D having a low operating temperature operates to move the valve body C and supply water to the sprinkler head F.
When the solder (not shown) of the sprinkler head F melts, water is discharged from the sprinkler head F to extinguish the fire.
[0036]
Thus, in the present embodiment, among the heat sensitive bodies (sprinkler head F, heat sensitive portion D) arranged on the ceiling, those closest to each other, that is, when both the heat sensitive portion D and the sprinkler head F are activated. In addition, since the water is discharged for the first time, it becomes a fire extinguishing facility preferred in houses that dislike water discharge due to the sprinkler head's explosion.
[0037]
In particular, since water is always filled up to the head connection port B, there is no delay in water discharge unlike the dry pre-operation type fire extinguishing equipment.
Moreover, since the header is provided and the heat sensitive part D of the fixture 1 is arranged at the center of the plurality of sprinkler heads, a large range can be protected without increasing the number of sprinkler heads.
[0038]
The embodiment of the present invention is not limited to the above, and may be configured as follows, for example.
(1) As an obstacle drop assisting means, instead of the inner end of the screw hole 2A of the support frame being the inclined surface 2t, the outer end surface of the glass bulb receiver 5 may be an inclined surface.
Note that both of them can be inclined surfaces.
[0039]
(2) Instead of the rear end surface 3f of the rear end portion 3d of the valve stem portion 3b and the inner end surface of the glass bulb receiver 5 being hemispherical, one of them may be hemispherical.
[0040]
(3) Instead of using the glass bulb 7 as the heat sensitive member of the heat sensitive part D, a soluble metal, a bimetal or the like is used.
[0041]
(4) Instead of using the head connection pipe E, the head connection port B is extended so that the tip of the head connection port B is at the design arrangement position of the sprinkler head F.
[0042]
(5) Instead of attaching a heat-sensitive part having the shape of a frame-type sprinkler head to the head connection port, a heat-sensitive part having the shape of a flash-type sprinkler head may be attached.
(6) The attachment state of the sprinkler head attachment 1 is not limited. For example, the state of FIG. 1 is rotated 90 degrees to the left, and only the glass valve 7 is provided near the top. May be moved upward rather than sideways.
If it installs in this way, since it will become easy to receive the hot air flow from which direction a glass bulb, sensitivity will increase.
[0043]
【The invention's effect】
Since the present invention is configured as described above, all the valve element moving obstacles drop off when a fire is detected, so that a sliding passage for the valve element can be secured. Therefore, the valve can be opened smoothly and reliably.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and showing a closed valve state.
FIG. 2 is a longitudinal sectional view showing another state of FIG. 1 and showing a half-open state.
FIG. 3 is a view showing another state of FIG. 1, and is a longitudinal sectional view showing a valve open state.
FIG. 4 is a front view showing a state in which a sprinkler head is attached to a fire extinguishing pipe via a sprinkler head attachment.
FIG. 5 is a front view showing an arrangement state of a fire extinguishing device.
FIG. 6 is a front view of a second embodiment of the present invention.
FIG. 7 is a bottom view of the second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sprinkler head mounting tool 2A Screw hole part 2t Inclined surface 3a Valve part 3b Valve rod part 3d Rear end part 5 Glass valve receptacle 7 Glass valve A Pipe connection port B Head connection port C Valve body D Heat sensitive part E Head connection pipe F Opening Type sprinkler head

Claims (4)

A tubular body with a pipe connection port at one end and a mounting port for a heat sensitive part at the other end, and a head connection port formed between the both ends, and a valve body inserted and attached to the other end side A guide that regulates the valve, a valve body that is provided in the main body and that cuts off between the two connection ports, and is provided at an attachment port of the heat sensitive part, and supports the valve body in a normally closed state, in the event of a fire. A sprinkler head mounting tool comprising: a heat-sensitive part that is opened by heat sensing; and an open-type sprinkler head provided through a head coupling pipe connected to the head coupling port ;
The valve body is formed by a valve portion that closes the pipe connection port and a valve rod portion that is inserted into a through hole formed in the guide,
A diameter of a rear end portion of the valve stem portion inserted into the through hole of the guide is formed to have a diameter that can be slidably fitted into the through hole of the guide, and the valve rod is opposed to the head connection port. Between the rear end portion of the guide portion and the valve portion, a narrow rod portion having a smaller diameter than the rear end portion is formed, and the outer diameter of the thin rod portion is made smaller than the inner diameter of the through hole of the guide. Sprinkler head mounting tool characterized by A support frame provided at an attachment port of the heat sensitive part and projecting in a moving direction of the valve stem part, a rear end of the glass bulb of the heat sensitive part is pressed by the support frame, and a tip of the glass bulb is 2. The sprinkler head mounting tool according to claim 1, wherein the sprinkler head mounting tool is inserted into an insertion hole provided in a rear end portion of the valve stem portion . The length of the valve stem portion is set so that the rear end portion of the valve stem portion does not come into contact with the screw hole of the support frame when sliding, and the back surface of the valve portion is opened when the valve is opened. The sprinkler head mounting tool according to claim 2, wherein the sprinkler head mounting tool is in contact with the valve seat surface . 4. The sprinkler head mounting tool according to claim 1 , wherein a length of a rear end portion of the valve stem portion is shorter than a length of a through hole of the guide .

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