JP2012029764A - Water discharge joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water discharge joint surely preventing false water discharge by preventing a valve body from being opened even when pressurized fire extinguishing water is filled rapidly by virtue of a simple and miniaturized structure.SOLUTION: A joint body 12 includes a primary port 14, a secondary port 16 and a thermosensitive port 18 its one end mounting a thermosensitive decomposition part 28, and a valve hole 24 is formed at a position coaxial to the thermosensitive port 18 of a partition 22. A disc member 44 forms a valve body part 46 for opening and closing a flow path by inserting one end thereof into the valve hole 24, and forms at the other end an abutting part 50 abutting to the closing part of the thermosensitive port 18 by the thermosensitive decomposition part 28, and is held at an initial position by a spring 52. A first lift amount L1 from the initial position required for the valve body part 46 to open the valve hole 24 is set so as to be larger than a second lift amount L2 from the initial position required for the abutting part 50 to be abutted on the closing part of the thermosensitive port 18 and stopped by filling of pressurized fire extinguishing water on the primary port side.

Description

The present invention relates to a water discharge joint that includes a heat sensitive part and discharges water from a head connected separately by the operation of the heat sensitive part.

  Conventionally, when a head is installed in a portion where there is an obstacle such as a ceiling beam which hinders water spraying, a water discharge joint for connecting a head provided with a heat sensitive portion is used.

  FIG. 4 shows an example of a conventional water discharge joint. In FIG. 4, the main body 100 of the water discharge joint is provided with a primary port 102 serving as a pipe connection port, a secondary port 104 serving as a head connection port, and a heat sensitive port 108 to which a thermal decomposition unit 106 is attached. A valve body 112 is provided at a position of the communication port 110 that connects the primary port 102 and the secondary port 104, and the valve body 112 is provided with a small hole 114.

  In this water discharge joint, the fire extinguishing water pressurized to the primary port 102 in the installed state is filled with a pipe connection, and further, the fire fighting water is also filled into the heat sensitive port 108 side through the small hole 114 of the valve body 112. The valve element 112 is held in the closed position by the pressure by the primary side water filling.

  When the thermal decomposition unit 106 is thermally decomposed in response to a thermal airflow due to a fire, the thermal port 108 is opened, the valve body 112 is lifted, the communication port 110 is opened, and fire-extinguishing water is flowed from the primary port 102 to the secondary port 104. Water is discharged from an open-type watering head connected to the secondary port by piping.

  However, in such a conventional water discharge joint, when the water is completely filled with pressurized fire-extinguishing water after the installation work of the water discharge joint has been completed, There is a problem that the body opens temporarily and water flows, and fire-fighting water is accidentally discharged from the open head.

  The erroneous water discharge of this water discharge joint will be described with reference to the water discharge joint of FIG. 4. When the primary port 102 is rapidly filled with pressurized fire-extinguishing water, the water charge on the thermal port 108 side through the small hole 114 is delayed. The valve body 112 is lifted by the pressurization due to the rapid filling of the next port 102, and the fire-extinguishing water temporarily flows out to the secondary port 104.

  In order to solve this problem, the present applicant has proposed a water discharge joint shown in FIG. 5 (Patent Document 2). In FIG. 5, the water discharge joint 210 forms a cylinder 222 in the axial direction of the joint body 212, a piston 224 is slidably provided inside the cylinder 222, and a first cylinder chamber 226 is formed above the piston 224. A second cylinder chamber 228 is formed on the lower side.

  A primary port 214 is provided at a position of the joint body 212 opposite to the first cylinder chamber 226, and a water supply pipe 216 from the fire pump system is connected to receive the supply of pressurized fire water. A secondary port 218 is provided at the end of the first cylinder chamber 226, and an open type head 220, which is a watering head, is connected to the secondary port 218 via a head pipe 221.

  A valve body 234 that is integrally formed coaxially with the piston 224 is provided for the communication passage 232 that communicates the first cylinder chamber 226 and the secondary port 218, and an O-ring 236 is attached to the valve body 234, By being stored in the passage 232 at the initial position, the primary port 214 and the secondary port 218 are separated from each other via the first cylinder chamber 226.

  The valve body 234 opens the communication path 232 by moving the piston 224 downward. To open the communication path 232, the valve body 234 has a distance from the center of the O-ring 236 to the opening of the communication path 232 on the first cylinder chamber 226 side. Movement beyond a certain first lift amount L1 is necessary.

  A connecting member 240 is attached to the end of the joint body 212 on the second cylinder chamber 228 side, and a thermal port 238 is formed here. A thermal decomposition unit 244 is attached to the thermal port 238, and the thermal port 238 is closed. The valve body 248 is supported by a thermal decomposition part 244 incorporated in the lower side thereof. When the thermal airflow is received, the thermal decomposition part 244 is decomposed to drop the thermal mechanism side including the valve body 248 and open the thermal port 238. .

A plunger 245 that is integrally formed coaxially with the piston 224 is disposed for the thermal port 238. The plunger 245 formed integrally with the piston 224 passes through the shaft hole of the connecting member 240, the tip is located at the thermal port 238, and the closed end of the head valve body 248 provided at the tip of the plunger 245 and the thermal decomposition unit 244. The clearance of the second lift amount L2 is set in the initial state. Here, the second lift amount L2 is smaller than the first lift amount L1 for opening the valve body 234. L1> L2
It has become.

  When the installation work for the drainage joint is completed, the fire pumping equipment is started and pressurized fire-fighting water is supplied to the piping. At this time, pressurized fire-extinguishing water is rapidly charged from the water supply pipe 216 to the primary port 214 of the water discharge joint 210, and the piston 224 receives pressure from the rapid water filling and moves downward. However, at the position where the tip of the plunger 245 has moved by the second lift amount L2, the movement is restricted by contacting the head valve body 248 of the thermal decomposition unit 244, which is less than the first lift amount L1 required for opening the valve body 234. Since only the second lift amount L2 moves, the communication path 232 is not opened, and it is possible to reliably prevent accidental water discharge from the open head 220.

JP 2002-306626 A JP 2009-112485 A

  However, in the conventional water discharge joint shown in FIG. 5, even if the pressurized fire-extinguishing water is rapidly filled, the valve body is prevented from opening and erroneous water discharge can be reliably prevented. In addition, a moving member in which the piston and the plunger are integrally formed in the axial direction is required, and since the shape is complicated, there is a problem that the processing is complicated and the cost is increased.

  In addition, since the valve body, piston and plunger are integrally formed in the axial direction, the axial dimension becomes longer, and the joint body that accommodates it movably also becomes longer. There is a problem that the installation space becomes large.

An object of the present invention is to provide a water discharge joint that can prevent erroneous water discharge reliably by preventing a valve body from opening even when pressurized fire-extinguishing water is rapidly charged with a simple and downsized structure.

The present invention relates to a water discharge joint,
A primary port that supplies pressurized fire-extinguishing water, a secondary port to which a sprinkling head is connected, and a thermal port are provided, and a valve hole is formed at a position that is coaxial with the thermal port of the partition that separates the primary port and the secondary port. The joint body,
A thermal decomposition part that is attached to the thermal port and closes and decomposes when receiving a thermal airflow to open the thermal port;
It is incorporated into the joint body so that it can move coaxially with the axial line passing through the heat sensitive port and the valve hole, and a valve body part that is inserted into the valve hole to open and close the flow path is formed at one end, and a heat sensitive decomposition part is provided at the other end. A disc member having a contact portion that contacts the closed portion of the heat sensitive port;
A spring member for holding the disc member in a predetermined initial position;
With
The disc member is formed by the first lift amount L1 from the initial position necessary for the valve body portion of the disc member to open between the primary port and the secondary port, and filling of the water for pressurized fire extinguishing on the primary port side. The first lift amount L1 is set to be larger than the second lift amount L2 with respect to the second lift amount L2 from the initial position necessary for moving and contacting the closed part of the thermal port and stopping. It is characterized by.

  According to the present invention, the disk member has a simple structure in which a valve body portion is formed at one end, and a contact portion that contacts a closed portion by a thermal decomposition portion of a thermal port is formed at the other end, and an axial dimension is also provided. It can be shortened, processing is easy, and cost can be reduced.

  The joint body has a structure that is almost the same as an ordinary valve body in which the primary port, secondary port, and heat sensitive port are arranged in a T shape, and is arranged in a direction perpendicular to the partition that partitions the primary port and the secondary port. By forming a valve hole coaxially with the heat-sensitive port and incorporating the valve member in such a manner as to be movable in the axial direction, the joint body can also be made as small as a normal valve. Therefore, the structure of the joint as a whole can be simplified and downsized, and can be realized at low cost.

In addition, when the pressurized fire-extinguishing water is rapidly filled, if the disc member moves by a second lift amount (L2) smaller than the first lift amount (L1) necessary for opening the valve body portion, the contact portion is heat sensitive. Accidental water discharge from the secondary port side can be reliably prevented without abutting and stopping against the closed part of the port, and the construction work using the water discharge joint of the present invention can be speeded up. it can.
Moreover, since the fire extinguishing water is filled only in the primary port and the heat sensitive port is not filled, the closed state of the valve body can be maintained with a simple structure without using the pressure of the fire fighting water.

In addition, when the pressurization due to rapid filling is stopped, the disk member is returned to the initial position by the spring member, and the disk member does not always press the closed part of the heat sensitive port. There is no adverse effect such as forcibly opening the port.

Sectional drawing which showed embodiment of the water discharge joint by this invention Explanatory drawing which showed the operation | movement at the time of rapidly filling pressurized fire extinguishing water in the 1st cylinder chamber of embodiment of FIG. Explanatory drawing which showed the operation | movement which a thermal decomposition part decomposes | disassembles and discharges in the state of FIG. Sectional view showing a conventional water discharge joint Sectional view showing a conventional water discharge joint that prevents accidental water discharge due to rapid water filling

  FIG. 1 is a sectional view showing an embodiment of a water discharge joint according to the present invention. In FIG. 1, the joint body 12 of the water discharge joint 10 is formed with a primary port 14 and a secondary port 16 on both the left and right sides, and a heat-sensitive port 18 is formed in the orthogonal lower direction to form a T-shaped joint.

  The primary port 14 is connected with a water supply pipe 15 from the fire pump equipment so as to be supplied with pressurized fire water. A head 20, which is a watering head, is connected to the secondary port 16 via a head pipe 21. The head 20 may be an open type or a closed type. Furthermore, a thermal decomposition portion 28 is screwed and fixed to the thermal port 18 via a guide bush 26.

  The thermal decomposition part 28 has a glass bulb 32 arranged inside a support frame 30, and the glass bulb 32 supports a holder 34 and a washer 36 arranged on the thermal port 18 side, and an adjustment screw 38 is placed on the opposite side via a holder 40. The outside of the adjusting screw 38 is closed with a seal cover 42 such as a paint.

  The glass bulb 32 is filled with a thermal expansion solution such as alcohol. When the temperature rises to a predetermined temperature by receiving a hot air current, the glass bulb 32 is destroyed by thermal expansion, the holder 34 and the washer 36 are scattered and dropped, and the thermal port 18 is opened. And

  A partition wall 22 is formed inside the joint body 12 that partitions the primary port 14 and the secondary port 16, and a valve hole 24 is formed at the position of the partition wall 22 through which the axial center line from the thermal port 18 passes.

  A disk member 44 is slidably incorporated in the axial direction with respect to the valve hole 24 and the guide bush 26 on the side of the thermal port 18 arranged coaxially therewith. The disc member 44 forms a valve body 46 at one upper end, and an O-ring 48 is mounted in the ring groove. A valve body step 47 having a diameter larger than that of the valve body 46 is provided at the lower end of the valve body 46, and the valve body step 47 contacts the lower surface of the partition wall 22 around the valve hole 24, Restricts movement in the direction. A contact portion 50 is formed at the other lower end of the disk member 44.

  A coiled spring 26 is incorporated between the valve body 46 of the disk member 44 and the guide bush 26 to hold the disk member 44 at the initial position shown in the figure.

  The disk member 44 is in a valve closed state in which the O-ring 48 of the valve body 46 is positioned in the valve hole 24 at the initial position by the spring 52 and the primary port 14 and the secondary port 16 are separated. The amount of movement of the disk member 44 required to open the valve by communicating the primary port 14 and the secondary port 16 is the first from the center of the O-ring 48 to the opening of the valve hole 24 on the secondary port 16 side. The lift amount is L1. That is, when the disk member 44 moves downward by the first lift amount L1 from the illustrated initial position, the valve hole 24 is opened, and the valve is in an open state in which the primary port 14 and the secondary port 16 are communicated.

  On the other hand, the abutting portion 50 serving as the lower end of the disc member 44 is opposed to the holder 34 serving as a closed portion of the thermal decomposition portion 28 at a predetermined initial position with a predetermined gap therebetween. In order to come into contact with the holder 34 serving as the closed portion of the portion 28, it is necessary to move downward by the second lift amount L2 that is the distance between the two.

In the present embodiment, the first lift amount L1 necessary for opening the valve body portion 46 of the disc member 44 and the first lift amount L1 required for the abutting portion 50 to abut against the closed portion of the thermal decomposition portion 28. As for the 2 lift amount L2, the second lift amount L2 is made smaller than the first lift amount L1, that is, L1> L2.
It is set to become.

  For this reason, even if the disc member 44 is moved by receiving the rapid filling of pressurized fire-extinguishing water from the water supply pipe 15, the lift amount whose movement is restricted by the contact portion 50 coming into contact with the holder 34 of the thermal decomposition unit 28. Since it only moves by L2 and does not exceed the first lift amount L1 required to open the valve body 46, the valve body 46 does not open even if the disc member 44 moves downward.

  On the other hand, when the thermal decomposition portion 28 is decomposed and opened by receiving a hot air current, the disc member 44 is exposed to the outside through the opening portion of the opened thermal port 18, and the valve body portion 46 is thus in contact with the first. By moving downward beyond the lift amount L1, the valve hole 24 can be opened, and the primary port 14 and the secondary port 16 can be communicated with each other.

  FIG. 2 is an explanatory view showing the operation when the pressurized fire-extinguishing water is rapidly charged in the embodiment of FIG. When the installation work of the water discharge joint shown in FIG. 1 is completed, the fire extinguishing pump equipment is activated to supply pressurized fire extinguishing water to the pipe. At this time, the water discharge joint of this embodiment is rapidly charged with water for fire extinguishing. No accidental water discharge from the open head.

  In FIG. 2, when pressurized fire-extinguishing water is rapidly charged from the water supply pipe 15 to the primary port 14 of the water discharge joint 10 as indicated by an arrow A, the fire-extinguishing water pressurizes the upper end surface of the disc member 44, The disk member 44 moves downward as indicated by an arrow B while compressing the spring 52 under the pressure of.

  However, the movement of the disk member 44 is restricted by contacting the holder 34 of the thermal decomposition unit 28 that closes the thermal port 18 at the position where the contact part 50 at the tip of the disk member 44 has moved by the second lift amount L2 shown in FIG. Thus, even if the valve body portion 46 moves to the open side with the movement of the disc member 44 due to the rapid filling of the fire-extinguishing water, the first lift amount L1 required for opening the valve body portion 46 shown in FIG. Since the smaller second lift amount L2 moves, the valve hole 24 is not opened but is kept closed.

  For this reason, even if water for pressure and fire extinguishing is rapidly filled in the water discharge joint 10 of this embodiment, the valve is not opened, and erroneous water discharge from the head 20 connected to the secondary port 18 by the head pipe 22. Can be reliably prevented.

  When the quick water filling to the primary side of the water discharge joint 12 is completed, the pressure applied to the upper end surface of the disc member 44 is stabilized, and accordingly, the disc member 44 is pushed back to the initial position side by the spring 52 and the lower end abuts. Even if the part 50 leaves | separates from the holder 34 or does not leave | separate, the pressing force with respect to the holder 34 will fall.

  For this reason, since the disk member 44 is not always pressed in the opening direction, there is no adverse effect such as destroying the thermal decomposition portion 28.

  FIG. 3 is an explanatory view showing the operation of the thermal decomposition unit disassembling and discharging water in the state of FIG. In FIG. 3, when a thermal airflow due to a fire is received by the thermal decomposition unit 28 in a normal monitoring state, the glass bulb 32 is thermally decomposed, the holder 34 and the thrust washer 36 are detached, and the thermal port 18 is opened.

  When the thermal port 18 is opened, the disc member 44 receives the force of pressurized charging on the first port 14 side and moves downward, and the restriction of the movement of the disc member 44 is released by opening the thermal port 18. Therefore, the disc member 44 moves to a position where the lower end contact portion 50 protrudes from the thermal port 18, and the valve body portion 46 moves beyond the first lift amount L1 shown in FIG. Thus, the valve hole 24 is opened, and fire-extinguishing water is allowed to flow from the primary port 14 to the secondary port 16 and discharged from the head 20 connected by the head pipe 21. When the disc member 44 is moved downward, the lower surface of the valve body step portion 47 comes into contact with the inner surface of the joint body 12 near the heat sensitive port 18 to suppress leakage of fire-extinguishing water from the heat sensitive port 18.

  In the above embodiment, the closed type head using the glass bulb 32 is taken as an example of the thermal decomposition unit 28, but it may be a thermal decomposition unit using low-temperature molten solder, and similarly from the outside. As long as the structure does not cause water leakage with respect to the impact, a closed head having an appropriate structure can be applied to this embodiment as it is.

Moreover, the foam head may be sufficient as the head 20 pipe-connected to the water discharge joint of this embodiment. In addition, the present invention includes appropriate modifications that do not impair the objects and advantages thereof.

10: Water discharge joint 12: Joint body 14: Primary port 16: Secondary port 22: Partition wall 24: Valve hole 28: Thermal decomposition part 32: Glass valve 44: Disc member 46: Valve body part 52: Spring

Claims (1)

A primary port for supplying pressurized fire-extinguishing water, a secondary port to which a sprinkling head is connected, and a thermal port, and a valve hole at a position coaxial with the thermal port of a partition partitioning the primary port and the secondary port A joint body formed with
A thermal decomposition part which is attached to the thermal port and closes and decomposes when receiving a thermal airflow to open the thermal port;
The valve body part is incorporated in the joint body so as to be movable coaxially with an axial line passing through the heat-sensitive port and the valve hole, and formed at one end into the valve hole to open and close the flow path, and at the other end A disc member having a contact portion that contacts the closed portion of the thermal port by the thermal decomposition portion;
A spring member for holding the disk member in a predetermined initial position;
With
The first lift amount L1 from the initial position necessary for the valve body portion of the disk member to open the space between the primary port and the secondary port, and charging of the pressure-extinguishing water on the primary port side. With respect to the second lift amount L2 from the initial position necessary for the disk member to move by water and come into contact with the closed portion of the thermal port and stop, the first lift amount L1 is set to the second lift amount. A water discharge joint which is set to be larger than L2.

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