JP2010075398A - Sprinkler device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sprinkler device without generating stagnant water in the vicinity of a sprinkler head. <P>SOLUTION: The sprinkler device 100 includes the sprinkler head 1, and an approximately Y-shaped branch joint 13 which can be connected to the sprinkler head 1 and two feed-water pipes 15a and 15b. The branch joint 13 includes an inflow part 13a for letting water flow in from one feed-water pipe 15a, an outflow part 13b for letting water out into the other feed-water pipe 15b, a sprinkler outflow part 13c for letting water flow out into the sprinkler head 1, and a branch part 13d where water flowing from the inflow part 13a branches into the outflow part 13b and into the sprinkler outflow part 13c. The cross-sectional area of the inflow part 13a in the direction of water flow W1 becomes smaller toward the branch part 13d, and the cross-sectional area of the outflow part 13b in the direction of water flow W2 becomes larger toward the feed-water pipe 13b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sprinkler device that is connected to a water supply that is a water supply source and injects water using tap water supply pressure.

  Among sprinkler devices that automatically detect fires and sprinkle water from the ceiling, etc., in sprinkler devices that are connected to the water supply and inject water using tap water supply pressure, the middle part of the water pipe (branch joint) Since the sprinkler head is attached to the part), stagnant water called “dead water” may be generated in the vicinity of the sprinkler head.

  If such stagnant water is generated in the sprinkler device arranged in the middle of the water pipe, it is impossible to use it as a water supply, so prevention of stagnant water is a very important issue. Then, the sprinkler apparatus using the branch joint which has a function which prevents generation | occurence | production of stagnant water is proposed (for example, refer patent document 1, 2).

  In the sprinkler device (fire fighting watering device) described in the cited document 1, the branch joint portion is formed of a bent pipe, and in the sprinkler device (sprinkler head branch joint) described in the cited document 2, a substantially Y-shaped branch joint is provided. It is used. And generation | occurrence | production of stagnant water is prevented by generating a vortex | eddy_current in the tap water head connection port vicinity with the tap water which flows in these branch joints.

JP-A-2-239877 JP-A-5-15614

  In the sprinkler devices described in Patent Documents 1 and 2, stagnant water can be suppressed by the vortex generated in the bent or substantially Y-shaped branch joint, but the occurrence of stagnant water in the vicinity of the sprinkler head is completely prevented. The reality is that it cannot be lost.

  The problem to be solved by the present invention is to provide a sprinkler device in which stagnant water does not occur in the vicinity of the sprinkler head portion.

The sprinkler device of the present invention is a sprinkler device including a sprinkler head portion and a substantially Y-shaped branch joint that can be connected to the sprinkler head portion and two water supply pipes,
The branch joint includes an inflow portion into which water flows from the one water supply pipe, an outflow portion from which water flows out to the other water supply pipe, a sprinkler outflow portion from which water flows out to the sprinkler head portion, and the inflow portion. The water that has flowed in further has a branch part that branches into the outflow part and the sprinkler outflow part,
The cross-sectional area of the inflow portion with respect to the water flow direction decreases toward the branch portion, and the cross-sectional area of the outflow portion with respect to the water flow direction increases toward the other water supply pipe. .

  In such a configuration, the cross-sectional area of the inflow portion decreases toward the branch portion, and the cross-sectional area of the outflow portion increases from the branch portion toward the water supply pipe. The water that has entered from the reduced inflow part flows into the sprinkler outflow part because it has sufficient water volume and flow velocity to generate eddy currents to prevent stagnant water. Is generated, and the stagnant water at the sprinkler outlet can be eliminated.

Here, when the inflow part and the outflow part are an upper inflow part and a lower inflow part, and an upper outflow part and a lower outflow part with respect to the flow direction of water,
It is desirable that the cross-sectional area of the upper inflow portion with respect to the water flow direction decreases toward the branch portion, and the cross-sectional area of the upper outflow portion with respect to the water flow direction increases toward the other water supply pipe. .

  With such a configuration, since the cross-sectional area with respect to the flow direction on the upper side of the inflow portion and the outflow portion is changed, the flow rate of water in the inflow portion is increased, and the protrusion for changing the cross-sectional area is By providing in this, the effect of inducing the flow of water to the sprinkler outflow portion is generated, so that overflow is more likely to occur, which is effective in eliminating stagnant water in the sprinkler outflow portion.

  Moreover, it is desirable to provide a male screw part on the outer peripheral surface of the sprinkler outflow part. With such a configuration, the height can be adjusted by installing a sprinkler fixing member provided with a female threaded portion that is screwed into the male threaded portion on the ceiling portion or the component member where the sprinkler device is installed. It can be installed in a safe state.

  On the other hand, when the height adjustment is made by providing a male screw part etc. on the inner peripheral surface of the sprinkler outflow part, it is necessary to form irregularities such as a male screw part in the sprinkler outflow part. When the male screw portion is provided on the outer peripheral surface, it is not necessary to form irregularities such as the male screw portion on the inner peripheral surface, so that the inner peripheral surface can have a streamline structure without more irregularities. For this reason, even if it is comparatively small inflow, the eddy current required for prevention of stagnant water can be generated. Furthermore, if there are no irregularities on the inner peripheral surface of the sprinkler outflow part, the water pressure loss at the branch joint will be reduced, so it is an accessory to make up for the lack of water pressure necessary for sprinkling from the sprinkler device in low water pressure areas. The possibility of an increase in equipment is reduced, and a sprinkler can be installed at a relatively low cost.

  Furthermore, it is desirable to provide a fixing screw portion above the branch portion of the branch joint. With such a configuration, it is possible to install the sprinkler device so as to be suspended from the beam or the like of the ceiling portion by screwing an arbitrary suspension to the fixing screw portion provided on the upper side of the branch portion. Because it becomes possible, it can cope with more various installation methods.

  On the other hand, the opening portions of the inflow portion and the outflow portion are in a state in which the axial center is inclined with respect to the horizontal direction, and the opening portions of the inflow portion and the outflow portion are located above the branch portion. It is desirable to provide it. With such a configuration, connection with a water pipe that is often piped above the sprinkler device is facilitated, and bending of the connection portion between the opening and the water pipe can be eliminated, so that pressure loss is also reduced. .

  According to the present invention, it is possible to provide a sprinkler device that provides a sprinkler device in which stagnant water does not occur in the vicinity of the sprinkler head portion.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a vertical sectional view showing a sprinkler device according to an embodiment of the present invention, FIG. 2 is an enlarged view of the sprinkler device shown in FIG. 1, and FIG. 3 is a front view of a branch joint constituting the sprinkler device shown in FIG. 4 is a plan view of the branch joint shown in FIG. 3, and FIG. 5 is a side view of the branch joint shown in FIG. FIG. 6 is a vertical sectional view showing a state after the installation work of the sprinkler device shown in FIG. 1 is completed.

  As shown in FIGS. 1 and 2, the sprinkler device 100 of the present embodiment includes a sprinkler head portion 1, a substantially Y-shaped branch joint 13 that can be connected to the sprinkler head portion 1 and the two water supply pipes 15 a and 15 b. And arranged on the back side of the ceiling surface 3. The branch joint 13 has an inflow portion 13a for allowing water to flow in from one water supply pipe 15a, an outflow portion 13b for allowing water to flow out to the other water supply pipe 15b, and a water flow out to the sprinkler head portion 1. The sprinkler outflow part 13c and the branch part 13d into which the water which flowed in from the inflow part 13a branches in the outflow part 13b direction and the sprinkler outflow part 13c direction are provided.

  As shown in FIG. 1, between two parallel field edges 5 fixed to the back surface of the ceiling surface 3 by a mounting plate 4 having an L-shaped cross section, two corners are perpendicular to the field edge 5. A bar 7 is detachably attached via a clip 6, and a sprinkler device 100 is fixed to a pedestal 9 that is mounted so as to cross these square bars 7. The outer periphery of the sprinkler outflow portion 13c of the branch joint 13 constituting the sprinkler device 100 is disposed so as to penetrate the mounting hole 9a provided in the base 9, and the retaining ring 10 and the lock nut disposed above and below the mounting hole 9a. 8 is screwed to the male thread portion 13m on the outer peripheral surface of the sprinkler outlet portion 13c, and is fastened so that the base 9 is sandwiched between the retaining ring 10 and the lock nut 8.

  In addition, a circular opening 3 a is formed in the ceiling surface 3, and a disk-like board 16 is attached to the opening 3 a via the attachment plate 11, and the sprinkler attached to the sprinkler outflow part 13 c of the branch joint 13. The head 1 is maintained in a state where it passes through an opening 6a provided at the center of the board 16 and is exposed to the indoor side. A ring-shaped cover 2 is attached to the lower surface of the ceiling surface 3 so as to cover the gap between the opening 3 a and the outer periphery of the board 16. A ball chain 12 that connects one mounting plate 11 and the sprinkler head 1 is provided.

  As shown in FIG. 2, the cross-sectional area of the inflow portion 13a with respect to the water flow direction W1 of the inflow portion 13a decreases toward the branch portion 13d, and the breakage of the outflow portion 13b with respect to the water flow direction W2 of the outflow portion 13b. The area is formed so as to increase toward the other water supply pipe 15b. Here, the said cross-sectional area means the area of the cross section orthogonal to the flow direction W1, W2 of water.

  Specifically, by providing a smooth protrusion 23 that hangs down toward the branch portion 13d on the inner surface of the branch joint 13 that is located immediately above the branch portion 13d above the sprinkler outlet portion 13c, the inflow portion 13a and the outflow portion 13b are connected to each other. The upper inflow portion is divided into an upper inflow portion 13au and a lower inflow portion 13ad, and an upper outflow portion 13bu and a lower outflow portion 13bd with respect to the respective water flow directions W1 and W2 with the axis as a boundary. The cross-sectional area with respect to the water flow direction W1 of 13au decreases toward the branch portion 13d, and the cross-sectional area with respect to the water flow direction W2 of the upper outflow portion 13bu increases toward the other water supply pipe 15b. .

  As a result, the cross-sectional area of the inflow portion 13a decreases toward the branch portion 13d, and the cross-sectional area of the outflow portion 13b increases from the branch portion 13d toward the water supply pipe 15b. The water that has entered from the inflow portion 13a that has decreased toward the water becomes a sufficient amount of water and flow velocity to generate a vortex to prevent stagnant water, and flows into the sprinkler outflow portion 13c. Overflow T occurs in the portion 13c, and stagnant water in the sprinkler outflow portion 13c can be eliminated.

  Further, by providing a smooth projection 23 that hangs down toward the branch portion 13d, the cross-sectional area of the upper inflow portion 13au is reduced toward the branch portion 13d, and the cross-sectional area of the upper outflow portion 13bu is directed toward the water supply pipe 15b. Since the cross-sectional area with respect to the flow direction of the water on the upper side of the inflow portion 13a and the outflow portion 13b is changed due to the configuration so as to increase, overflow T is likely to occur, and stagnant water in the sprinkler outflow portion 13c is reduced. It is effective in eliminating.

  Further, since the male screw portion 13m is provided on the outer peripheral surface of the sprinkler outlet portion 13c, the fixing position with respect to the base 9 is changed by changing the screwing position of the retaining ring 10 and the lock nut 8 that are screwed into the male screw portion 13m. Can be changed. That is, the entire sprinkler device 100 can be installed in a state where the height can be adjusted.

  On the other hand, as shown in FIGS. 3 to 5, the openings 25 a and 25 b of the inflow portion 13 a and the outflow portion 13 b are provided in a state in which the respective shaft centers 25 ac and 25 bc are inclined with respect to the horizontal direction. Therefore, as shown in FIG. 1, connection with water pipes (water supply pipes 15 a and 15 b) often piped above the sprinkler device 100 is facilitated, and the openings 25 a and 25 b and the water pipes (water supply pipes 15 a and 15 a, Since the bending of the connecting portion with 15b) can be eliminated, the pressure loss is also reduced.

  Moreover, as shown in FIG. 6, by screwing the fixing screw portion 24 provided on the upper side of the branch portion 13d of the branch joint 13 to the male thread-like lifting tool 20 fixed to the roof or the upper floor slab, Since the sprinkler device 100 can be installed on the ceiling surface 3 without using the pedestal 9 described above, various installation methods can be supported. In addition, the outer periphery of the openings 25a and 25b and the water supply pipes 15a and 15b can be covered with a heat insulating material 26 in order to prevent the occurrence of condensation in summer and freezing in winter.

  Next, other embodiments related to the branch joint will be described with reference to FIGS. FIG. 7 is a vertical sectional view showing another embodiment related to the branch joint, and FIG. 8 is a vertical sectional view showing another embodiment related to the branch joint. In addition, the part which has the same structure, function, etc. as the component part of the branch joint 13 shown in FIGS. 1-6 attaches | subjects the same code | symbol, and abbreviate | omits description.

  In the branch joint 30 shown in FIG. 7, the boundary portion between the inner surface of the inflow portion 13a and the inner surface of the sprinkler outflow portion 13c, and the boundary portion between the inner surface of the outflow portion 13b and the inner surface of the sprinkler outflow portion 13c are smoothly projected toward the branch portion 13d. Protrusion 31 is provided. That is, the cross-sectional area of the lower inflow portion 13ad with respect to the water flow direction W1 decreases toward the branch portion 13d, and the cross-sectional area of the lower outflow portion 13bd with respect to the water flow direction W2 increases toward the other water supply pipe 15b. Is configured to do. With such a configuration, the cross-sectional area of the lower inflow portion 13ad with respect to the water flow direction W1 decreases toward the branch portion 13d, and the cross-sectional area of the lower outflow portion 13bd with respect to the water flow direction W2 decreases. It will be in the state which increased toward.

  Therefore, as in the case of the branch joint 13 (see FIG. 2) described above, the water that has entered from the inflow portion 13a whose cross-sectional area has decreased toward the branch portion 13d generates a vortex for preventing stagnant water. Since the water amount and the flow rate become sufficient, the water flows into the sprinkler outflow portion 13c, so that overflow occurs in the sprinkler outflow portion 13c, and stagnant water in the sprinkler outflow portion 13c can be eliminated.

  In the branch joint 40 shown in FIG. 8, the projection 23 similar to the branch joint 13 shown in FIG. 2 and the projection 31 similar to the branch joint 31 shown in FIG. 7 are provided. That is, the cross-sectional area of the upper inflow portion 13au and the lower inflow portion 13ad with respect to the water flow direction W1 decreases toward the branch portion 13d, and the upper outflow portion 13bu and the lower outflow portion 13bd have a cross section with respect to the water flow direction W2. The area is configured to increase toward the other water supply pipe 15b. With such a configuration, the cross-sectional area of the inflow portion 13a with respect to the water flow direction W1 sharply decreases toward the branch portion 13d, and the cross-sectional area of the outflow portion 13b with respect to the water flow direction W2 is directed toward the water supply pipe 15b. And suddenly increases. For this reason, an overflow is likely to occur in the sprinkler outflow portion 13c, which is effective in eliminating stagnant water in the sprinkler outflow portion 13c.

  The sprinkler device of the present invention can be widely used in buildings such as office buildings, factories, movie theaters and department stores.

1 is a vertical sectional view showing a sprinkler device according to an embodiment of the present invention. FIG. 2 is a partially omitted enlarged view of the vicinity of the sprinkler device shown in FIG. 1. It is a front view of the branch joint which comprises the sprinkler apparatus shown in FIG. FIG. 4 is a plan view of the branch joint shown in FIG. 3. FIG. 4 is a side view of the branch joint shown in FIG. 3. FIG. 2 is a vertical sectional view showing a state after the installation work of the sprinkler device shown in FIG. 1 is completed. It is a vertical sectional view showing other embodiments about a branch joint. It is a vertical sectional view showing other embodiments about a branch joint.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sprinkler head 2 Cover 3 Ceiling surface 3a, 6a, 25a, 25b Opening part 4 Mounting plate 5 Edge 6 Clip 7 Square bar 8 Lock nut 9 Base 9a Mounting hole 10 Stop ring 11 Mounting plate 12 Ball chain 13, 30 Branch joint 13a inflow portion 13b outflow portion 13c sprinkler outflow portion 13d branching portion 13au upper inflow portion 13ad lower inflow portion 13bu upper outflow portion 13bd lower outflow portion 13m male screw portion 14 joint 15a, 15b water supply pipe 16 board 20 hanging tool 23, 31 Protrusion 24 Fixing screw portion 25ac, 25bc Shaft center 26 Heat insulating material 100 Sprinkler device T Eddy current W1, W2 Water flow direction

Claims (5)

A sprinkler device comprising a sprinkler head portion and a substantially Y-shaped branch joint connectable to the sprinkler head portion and two water supply pipes,
The branch joint includes an inflow portion into which water flows from the one water supply pipe, an outflow portion from which water flows out to the other water supply pipe, a sprinkler outflow portion from which water flows out to the sprinkler head portion, and the inflow portion. The water that has flowed in further has a branch part that branches into the outflow part and the sprinkler outflow part,
The cross-sectional area of the inflow portion with respect to the water flow direction decreases toward the branch portion, and the cross-sectional area of the outflow portion with respect to the water flow direction increases toward the other water supply pipe. Sprinkler device. When the inflow portion and the outflow portion are an upper inflow portion and a lower inflow portion, and an upper outflow portion and a lower outflow portion with respect to the flow direction of water,
A cross-sectional area of the upper inflow portion with respect to the water flow direction decreases toward the branch portion, and a cross-sectional area of the upper outflow portion with respect to the water flow direction increases toward the other water supply pipe. The sprinkler device according to claim 1.   The sprinkler device according to claim 1, wherein a male screw portion is provided on an outer peripheral surface of the sprinkler outflow portion.   The sprinkler device according to any one of claims 1 to 3, wherein a fixing screw portion is provided above the branch portion of the branch joint.   The openings of the inflow part and the outflow part are provided in a state where the axial center is inclined with respect to the horizontal direction, and the opening part of the inflow part and the outflow part is located above the branching part. The sprinkler device according to any one of claims 1 to 4.

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