JP2009112484A - Water discharge joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent erroneous water discharge by preventing a valve body from being opened even when pressurized fire extinguishing water is filled rapidly. <P>SOLUTION: Sealing liquid 30 such as oil or water is filled in a thermosensitive port 38 in a closed state by the mounting of a second cylinder chamber 28 and a thermosensitive decomposition part 44. The movement of a piston 24 when filling and pressurizing the fire extinguishing water from a primary port 14 to a first cylinder chamber 26 is suppressed by the damper action of the sealing liquid 30, the sealing liquid 30 is discharged to the outside when the thermosensitive port 38 is opened by the operation of the thermosensitive decomposition part, the piston 24 is moved exceeding a first lift amount L1, and the valve body 34 is opened. <P>COPYRIGHT: (C)2009,JPO&INPIT

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 watering head is installed in a portion where there is an obstacle such as a ceiling beam that hinders watering, a water discharge joint for connecting a head provided with a heat sensitive part is used.

  FIG. 13 shows an example of a conventional water discharge joint. In FIG. 13, 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 thermal 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.
JP 2002-306626 A

  However, in such a conventional water discharge joint, when installation of the water discharge joint was completed and the water for fire extinguishing was first charged from the primary port of the water discharge joint, it was slowly pressurized. If the water for fire extinguishing is not filled, there is a problem that the valve body is temporarily opened, water flows to the secondary port side, and the fire extinguishing water is accidentally discharged from the open type head connected to the secondary port.

  In the water discharge joint of FIG. 13, when the primary port 102 is rapidly filled with pressurized fire extinguishing water, the water on the sensing port 108 side through the small hole 114 is delayed. The valve body 112 is lifted by the pressurization due to the rapid water filling 102, and the fire-extinguishing water temporarily flows out to the secondary port 104.

An object of the present invention is to provide a water discharge joint that prevents a valve body from opening even when water is rapidly charged with pressurized fire extinguishing water and reliably prevents erroneous water discharge.

The present invention provides a water discharge joint. The water discharge joint of the present invention,
A cylinder formed inside the body,
A piston that is slidably disposed in the cylinder and divides the cylinder into a first cylinder chamber and a second cylinder chamber;
A primary port that communicates with the first cylinder chamber and supplies pressurized fire-fighting water;
A secondary port located in the first cylinder chamber and connected to the watering head;
A thermal port communicating with the second cylinder chamber;
A thermal decomposition part that attaches to and closes the thermal port, disassembles when receiving a hot air current, and opens the thermal port;
Formed on the first cylinder chamber side of the piston, provided at a position to close the flow path communicating the primary port and the secondary port, the piston moves to the second cylinder chamber side beyond the first lift amount (L1) A valve body that opens a flow path that communicates the primary port and the secondary port when
A plunger that is formed on the second cylinder chamber side of the piston and restricts the valve body to be movable from the closed position by a second lift amount (L2) smaller than the first lift amount (L1) in the closed state of the heat sensitive port;
The second cylinder chamber and the thermal port in the closed state are filled, and the movement of the piston when the fire-extinguishing water is charged and pressurized from the primary port to the first cylinder chamber is suppressed within the second lift amount (L2), When the thermal port is opened by the operation of the thermal decomposition unit, the encapsulation is released and the enclosing medium moves the piston beyond the first lift amount (L1) to open the valve body;
It is provided with.

Here, the encapsulating medium is an aqueous solution mixed with oil or an antifreezing agent. The encapsulating medium may be a high-pressure inert gas. Furthermore, the encapsulating medium may be a spring.

  According to the present invention, when the pressurized fire-extinguishing water is rapidly charged, the first cylinder chamber on the primary port side is also rapidly charged, thereby moving the piston to the second cylinder chamber side. By placing an oil, an aqueous solution mixed with an antifreezing agent, or an inert gas such as high-pressure nitrogen gas as the sealing medium in the second cylinder chamber and the heat sensitive port, the sealing medium functions as a damper against the movement of the piston. Therefore, even if the valve body moves due to the water filling, the movement is restricted to a movement amount smaller than the first lift amount (L1) necessary for opening the flow path.

  For this reason, even if the fire-fighting water pressurized by the water discharge joint according to the present invention is rapidly charged, the valve body does not open the flow path, and can reliably prevent erroneous water discharge from the secondary port side. Can speed up the construction work using this water discharge joint.

In addition, the encapsulated medium is placed in the second cylinder chamber and the thermal port, so that the encapsulated medium functions as a damper to suppress the movement of the piston, and the plunger tip is attached to the thermal port. Prevents deformation and distortion caused by mechanical impact on the thermal decomposition part and prevents water leakage from the thermal decomposition part without damaging the closed part of the part. it can.

  FIG. 1 is an explanatory view showing an embodiment of a water discharge joint according to the present invention. In FIG. 1, the water discharge joint 10 of this embodiment forms a cylinder 22 in the axial direction of the joint body 12, and a piston 24 with an O-ring 23 mounted in the cylinder 22 is slidably provided. The piston 24 divides the interior of the cylinder 22 into an upper first cylinder chamber 26 and a lower second cylinder chamber 28.

  A primary port 14 is formed on the side of the joint body 12 facing the first cylinder chamber 26, and pressurized fire-extinguishing water can be supplied from a fire pump system (not shown) by connecting a water supply pipe 16. In addition, a secondary port 18 is formed on the end side of the first cylinder chamber 26 of the joint body 12, and an open type head 20 that is a watering head is connected via a head pipe 21.

  A valve body 34 that is integrally formed coaxially with the piston 24 is disposed for the communication path 32 that extends from the first cylinder chamber 26 to the secondary port 18. The valve body 34 is attached to the communication path 32 by mounting an O-ring 36. It is closed. When the valve body 34 moves downward by a first lift amount L1 that is the distance from the center position of the O-ring 36 in the illustrated closed position to the opening on the first cylinder chamber 26 side, the communication passage 32 is opened, Fire extinguishing water can flow from the secondary port 14 to the secondary port 18.

  At the end of the joint body 12 on the second cylinder chamber 28 side, a thermal port 38 is formed by screwing and fixing a connecting member 40 fitted with an O-ring 42. A thermal decomposition portion 44 is screwed and fixed to the thermal port 38, and the thermal port 38 is closed by a head valve body 48 built in the thermal decomposition portion 44.

  A plunger 45 formed integrally with the piston 24 through the shaft hole of the connecting member 40 is positioned with respect to the heat-sensitive port 38 which is closed by mounting the heat-sensitive decomposition portion 44. An interval that becomes the second lift amount L2 is set as a predetermined gap between the head valve body 48 that is a closed portion of the port 38.

Here, the second lift amount L2 on the plunger 45 side is smaller than the first lift amount L1 on the valve body 34 side,
L1> L2
Is set to be a relationship.

  Therefore, when the piston 24 moves with the force in the opening direction of the valve body 34, the movement of the plunger 45 is restricted by the movement of the second lift amount L2 in which the tip of the plunger 45 abuts against the head valve body 48. The valve body 34 that is opened with the first lift amount L1 longer than the lift amount L2 does not open the communication path 32.

  In the present embodiment, the second cylinder chamber 28 and the thermal port 38 are filled with an encapsulating liquid 30 such as an aqueous solution mixed with oil or an antifreezing agent as an encapsulating medium.

  An injection valve 25 is provided on a side surface of the second cylinder chamber 28, and oil or an antifreezing agent is supplied to the second cylinder chamber 28 and the heat sensitive port 38 by screwing and injecting an injection hose to the injection valve 25. Filled liquid such as mixed aqueous solution can be filled.

  FIG. 2 is a cross-sectional view showing the thermal decomposition portion 44 of FIG. In FIG. 2, the thermal decomposition unit 44 uses an open type head.

  The thermal decomposition unit 44 includes a head body 46 and a body 47. The upper part of the head body 46 is screwed and fixed to the joint body 12. The head main body 46 opens at the bottom, and the body 47 is screwed to assemble both.

  In a state where the body 47 is screwed and fixed to the head main body 46, a head valve body 48 integrally provided with a deflector 56 having a water spray port is provided. The head valve body 48 is disposed at a position for closing the opening of the inflow passage and is sealed by an O-ring.

  The deflector 56 formed integrally with the head valve body 48 includes a plurality of radially-divided arm-shaped members around the shaft portion, and a stopper 57 is integrally formed on the outer peripheral side thereof. A coil spring 55 is incorporated in between.

  A thermal decomposition assembly is provided on the opening side of the body 47. The thermal decomposition assembly is composed of a slider 52, a balancer 54, a ball 47, a low-temperature solder 58, and a heat collecting plate 60, and is assembled and fixed to the body 47 with the head valve body 48 held in the closed state shown in the figure.

  The thermal decomposition assembly is mounted and fixed by the set bolt 59 after the slider 52 and the balancer 54 are assembled on the body 47 side via the ball 50.

  When the thermal decomposition unit 44 receives a hot air flow due to a fire, the low-temperature solder 58 melts when the temperature reaches a predetermined temperature, and the balancer 54 descends. For this reason, the support of the ball 50 is lost, and the slider 52, the balancer 54, and the thermal decomposition assembly are dropped by thermal decomposition. As a result, the support of the closed state of the head valve body 48 is released, and the head valve body 48 integrally formed with the deflector 56 is dropped by the hydraulic pressure of the sealing liquid applied to the water discharge hole and the force of the coil spring 57, and the head main body is dropped. The water discharge hole 46 is opened, and the sealed liquid filled on the heat sensitive port 38 side is discharged.

  FIG. 3 is a sectional view showing the injection valve 25 of FIG. In FIG. 3, the injection valve 25 forms a valve chamber 61 on the cylinder side wall of the joint body 12, and the valve chamber 61 has an injection hole 72 opened inside.

  A screw hole is formed on the outside of the valve chamber 62, and a stopper ring 68 is screwed and fixed with a seal packing 67 interposed therebetween with a valve body 64 having a knob 66 interposed through a spring 70. Yes.

  The through hole of the stopper ring 68 is also a screw hole, and the knob 66 is pushed against the spring 70 by screwing and fixing the tip of the hose for injecting oil or aqueous solution into the screw hole inside the stopper ring 68. When the valve body 64 is separated from the seal packing 67, the valve body 64 is opened, and oil or an aqueous solution can be injected from the connected injection hose into the internal second cylinder chamber through the injection hole 72.

  When the injection hose is removed from the inner screw hole of the stopper ring 68, the valve body 64 is returned to the closed position shown in the figure by the spring 70, and the filled liquid is held in a sealed state. Note that if the knob 66 is left exposed after the filling liquid is filled, the injection valve 25 may be opened when an object hits the knob, and the sealing liquid inside may leak. It is desirable to wear a protective cover such as a cap that protects 66.

  FIG. 4 is an explanatory view showing the operation when the pressurized fire-extinguishing water is rapidly charged in the embodiment of FIG. After the installation work of the water discharge joint 10 of the present embodiment is completed, pressurized fire extinguishing water is supplied to the water discharge joint 10 from a fire pump system (not shown) to fill the water, but in this embodiment, the water discharge joint 10 On the other hand, even if rapid water filling is performed, no erroneous water discharge from the open-type head 20 occurs.

  In FIG. 4, when pressurized fire-extinguishing water is rapidly charged from the water supply pipe 16 to the primary port 14 as indicated by an arrow A, the fire-extinguishing water is filled in the first cylinder chamber 26, With rapid water filling, the piston 24 is pushed and moved to the open side which is the thermal decomposition part 44 side.

  However, since the second cylinder chamber 28 located on the open side of the piston 24 is filled with the filled liquid 30 in advance, the piston 24 tries to move to the open side by the rapid filling of the fire extinguishing water to the first cylinder chamber 26. However, the piston 24 hardly moves to the open side due to the damping action by the filled liquid 30 filled in the second cylinder chamber 28, so that the valve body 34 holds the communication passage 32 in the closed state. In spite of rapid water filling, there is no accidental water discharge from the open head 20 connected to the secondary port 18.

  In addition, when the filled liquid 30 in the second cylinder chamber 28 is not completely filled, and a slight amount of air is mixed, the piston 24 is subjected to a force in the opening direction by the rapid filling of the first cylinder chamber 26. Is added, the piston 24 may move to the open side due to the compression of the air in the second cylinder chamber 28.

  However, even if the piston 24 moves to the open side, if the plunger 45 moves by the second lift amount L2 as shown in FIG. 1, the movement is restricted by contacting the head valve body 48 of the thermal decomposition unit 44. . For this reason, even if the piston 24 moves to the open side, the valve body 34 does not move beyond the first lift amount L1 necessary for opening the communication passage 32 in FIG. 1, and the piston 24 opens with rapid water filling. Even if it moves to the side, the valve body 34 does not open, and erroneous water discharge from the open head 20 can be reliably prevented.

  FIG. 5 is an explanatory view showing an operation in which the thermal decomposition part receives the thermal airflow from the fire in the steady monitoring state after the rapid filling of the fire-extinguishing water of FIG.

  In the state of FIG. 4, when the thermal decomposition unit 44 receives a thermal airflow due to a fire, as shown in FIG. 2, the low temperature solder 58 is melted by heating the heat collecting plate 60, and the slider 52, balancer 54 and ball 50 are supported. The lever 52, the saddle 50, and the head valve body 48 are disassembled and dropped due to the assembly load, and the deflector 56 is lowered and opened as shown in FIG.

  As a result of the decomposition operation of the thermal decomposition unit 44, the thermal port 38 that has been in a closed state until then is opened, and the sealed liquid 30 filled in the second cylinder chamber 28 as shown in FIG. 4 is released from the opened thermal port 38. In response to the pressurization of the fire extinguishing water in the first cylinder chamber 26, the piston 24 moves to the open side, and the plunger 45 protrudes from the thermal port 38 to the thermal decomposition unit 44 side.

  For this reason, the valve body 34 is released from the communication path 32 and is in an open state, as shown in the arrow B, the fire-extinguishing water is supplied from the primary port 14 to the secondary port 18, and the open head 20 connected by the head pipe 21. Will be discharged from.

  FIG. 6 is an explanatory view showing another embodiment in which high-pressure nitrogen gas is sealed in the second cylinder chamber for the damper, and shows the operation when the pressurized fire-extinguishing water is rapidly charged.

  In FIG. 6, in this embodiment, the second cylinder chamber 28 located on the open side of the piston 24 is filled with high-pressure nitrogen gas 62 as the sealing medium. The other configuration is the same as that of the embodiment of FIG. When the pressurized fire extinguishing water is rapidly charged to the primary port 14 as shown by the arrow A in the state where the high pressure nitrogen gas 62 is sealed in the second cylinder chamber 28, the first cylinder chamber 26 is also rapidly charged at the same time. The piston 24 is pushed to the open side with rapid filling of pressurized fire-extinguishing water.

  Here, assuming that the pressure of the high-pressure nitrogen gas 62 is lower than the pressure of the pressurized fire-extinguishing water rapidly filled, the high-pressure nitrogen gas 62 is compressed by the movement of the piston 24 to the open side, Although it moves to a position where the same pressure is reached, the movement at this time is performed while pressurizing the high-pressure nitrogen gas 62, so that it is a damped gentle movement, and the piston 24 moves in the opening direction, as shown in FIG. Even when the position is restricted by moving by the second lift amount L2 and coming into contact with the head valve body 48 of the thermal decomposition unit 44, the impact due to the contact hardly occurs because of the gentle movement.

  Further, if the pressure of the high-pressure nitrogen gas 62 is not so low as compared with the pressurized fire-extinguishing water, the piston 24 stops moving and contacts the head valve body 48 before the tip of the plunger 45 contacts the head valve body 48. There is no impact at all.

  Furthermore, the second lift amount L2 shown in FIG. 1 in which the tip of the plunger 45 abuts against the head valve body 48 and the movement is restricted is smaller than the first lift amount L1 required for opening the valve body 34. Even if the piston 24 moves in the opening direction, the valve body 34 does not open the communication path 32, and erroneous water discharge from the open type head 20 is reliably prevented.

  FIG. 7 is an explanatory diagram showing a steady monitoring state after the rapid water filling shown in FIG. When the rapid charging of the pressurized fire-extinguishing water to the primary port 14 in FIG. 6 is completed, the shocking force that presses the piston 24 accompanying the filling to the open side disappears, and the pressure of the filled fire-extinguishing water and the second cylinder The piston 24 returns to a position where the pressure of the high-pressure nitrogen gas 62 in the chamber 28 becomes the same, and in this state, a steady monitoring state is established.

  Then, when a thermal airflow due to a fire is received and thermally decomposed by the thermal decomposition unit 44 in a steady monitoring state, as shown in FIG. 5, the thermal port 38 is opened and the valve body 34 opens the communication path 32, so that the open type head is opened. 20 will be discharged.

  FIG. 8 is an explanatory view showing another embodiment of the water discharge joint according to the present invention, and the primary port and the secondary port in the embodiment of FIG. 1 are reversed in the embodiment of FIG. A closed head with a glass bulb is used as the heat sensitive part.

  In FIG. 8, the joint body 12 of the water discharge joint 10 is slidably provided with a piston 24 having an O-ring 23 attached to the cylinder 22 in the axial direction so that the lower first cylinder chamber 26 and the upper first cylinder chamber 26 are slidable. It is divided into two cylinder chambers 28.

  The primary port 14 is formed at the end of the joint body 12 on the first cylinder chamber 26 side, and the primary port 14 communicates with the first cylinder chamber 26 via the communication path 32. Is provided with a valve body 34 equipped with an O-ring 36 provided coaxially with the piston 24, and the communication passage 32 is closed.

  A secondary port 18 is formed on the side of the first cylinder chamber 26, and an open type head 20 installed outside is connected to the secondary port 18 through a head pipe 21.

  A connecting member 40 is screwed and fixed to the end of the joint body 12 on the second cylinder chamber 28 side by mounting an O-ring 42, and a heat sensitive port 38 is formed here. The thermal decomposition part 44 is screwed and fixed to the thermal port 38, whereby the thermal port 38 is closed. A plunger 45 that is integrally formed coaxially with the piston 24 is located in the thermal port 38.

  The thermal decomposition unit 44 is a closed head using a glass bulb 80. That is, the thermal decomposition unit 44 screws and fixes the mounting screw portion of the head main body 74 to the connecting member 40 on the thermal port 38 side, and arranges the head valve body 76 through the washer 78 in the opening of the water discharge hole. 76 is fixedly supported in a closed state by screwing a set screw 82 on the front end side through a glass bulb 80. A heat collecting plate 84 is attached to the tip side.

  When the valve body 34 provided in the communication path 32 on the primary port 14 side moves in the opening direction by a first lift amount L1 that is a distance from the center position of the O-ring 36 to the opening of the first cylinder chamber 26, The passage 32 can be opened and pressurized fire-extinguishing water can flow from the primary port 14 to the secondary port 18.

On the other hand, a second lift amount L2 is set between the tip of the plunger 45 located at the thermal port 38 and the contact surface of the head valve body 76 provided in the thermal decomposition unit 44. This relationship is shown in FIG. As in the first embodiment,
L1> L2
It has become.

  That is, even if the piston 24 moves in the opening direction and the tip of the plunger 45 moves by the second lift amount L2 in contact with the head valve body 76, the first lift amount L1 necessary for the valve body 34 to open is reduced. Since the movement does not exceed, erroneous water discharge due to the opening of the communication path 32 by the valve body 34 is not performed.

  Further, an injection valve 25 is provided on the side surface of the joint body 12 facing the second cylinder chamber 28, and the injection valve 25 has the structure shown in FIG. The injection valve 25 is used to fill the second cylinder chamber 28 with a sealing liquid 30 such as an aqueous solution mixed with oil or an antifreeze agent even in the embodiment of FIG.

  FIG. 9 is an explanatory view showing the operation when the pressurized fire-extinguishing water is rapidly charged in the embodiment of FIG. Prior to the start of use of the equipment, when the pressurized water for fire extinguishing is rapidly filled with the water supply pipe 16 from the fire pump equipment to the primary port 14 of the water discharge joint 10 as indicated by the arrow A, the force associated with the rapid filling is received. The valve body 34 is pushed in the opening direction.

  However, since the second cylinder chamber 28 on the upper side of the piston 24 is filled with the filled liquid 30, even if the piston 24 tries to move to the open side, the movement is blocked by the filled liquid 30, which is an incompressible medium. The piston 24 hardly moves even when the valve body 34 receives an impact due to water filling, and the closed state of the communication path 32 by the valve body 34 is maintained. Can be surely prevented.

  In addition, when some air or the like is mixed in the filled state of the filled liquid 30 in the second cylinder chamber 28, the air portion of the second cylinder chamber 28 receives a force to the open side due to rapid water filling. It is also conceivable that the piston 24 moves to the open side due to compression.

  However, even if the piston 24 moves to the open side, if the plunger 45 at the tip moves the second lift amount L2 shown in FIG. 8, the movement is restricted by contacting the head valve body 76 of the thermal decomposition portion 44, and the valve body. Since 34 does not move beyond the first lift amount L1 required for opening, the closed state of the communication path 32 by the valve body 34 is maintained, and even if the piston 24 moves to the opening side, Can prevent accidental water discharge.

  In addition, since the second cylinder chamber 28 is filled with the filled liquid 30, even if the piston 24 hardly moves or moves due to the rapid filling of the primary port 14, it is mixed into the filled liquid 30 in the second cylinder chamber 28. Since the movement is due to the compression of the air that is being compressed, even if the tip of the plunger 45 hits the head valve body 76, a sudden impact force is not generated, and the head valve body 76 of the thermal decomposition unit 44 is rapidly charged. Oil leakage and water leakage due to distortion and deformation due to the accompanying mechanical impact force do not occur.

  FIG. 10 is an explanatory view showing an operation in which the thermal decomposition section receives the hot air current from the fire in the steady state after the rapid water filling in FIG. 9 is completed and the water is decomposed and discharged.

  In the state of steady monitoring after rapid water filling in FIG. 9, if a thermal airflow due to a fire is received by the thermal decomposition unit 44, the glass bulb 80 is heated with the heat sensing of the heat collecting plate 84 and enclosed in the glass bulb 80. The alcohol which is being destroyed is boiled and expanded, and is removed when the support of the head valve body 76 is lost, and the thermal port 38 is opened.

  For this reason, the filled liquid 30 filled in the second cylinder chamber 28 and the heat sensitive port 38 side is discharged to the outside from the opened heat sensitive port 38, and the support at the closed position of the piston 24 is released accordingly. As shown in FIG. 10, the piston 24 is pushed by the pressure of the pressure-extinguishing water from the primary port 14 and moves to a position where it abuts on the connecting member 40 on the heat sensitive port 38 side. The fire-extinguishing water is supplied from the primary port 14 to the secondary port 18 as shown by the arrow B, and the fire-extinguishing water can be discharged from the open head 20.

  FIG. 11 shows the operation when the pressurized fire-extinguishing water is rapidly filled in another embodiment in which the second cylinder chamber 28 side is filled with the high-pressure nitrogen gas 62 in the embodiment of FIG.

  In FIG. 11, when the gas pressure of the high-pressure nitrogen gas 62 filled in the second cylinder chamber 28 by the injection valve 25 is lower than the pressure of the pressure-extinguishing water rapidly charged in the primary port 14, the valve body The piston 24 moves while compressing the high-pressure nitrogen gas 62 in the second cylinder chamber 28 on the open side in response to the pressing force due to the rapid filling of water 34.

  The movement amount of the piston 24 is restricted when the plunger 45 on the front end side comes into contact with the head main body 74 of the thermal decomposition unit 44. The movement amount of the plunger 45 is the second lift amount L2 shown in FIG. Since the body 34 does not exceed the first lift amount L1 for opening the communication path 32, even if the piston 24 moves to the open side due to rapid water filling of the primary port 14, the erroneous water discharge from the open head 20 Is prevented.

  Further, when the piston 24 is moved to the open side under the force of rapid water filling, a damping action is obtained because the high-pressure nitrogen gas 62 filled in the second cylinder chamber 28 is moved while being compressed. This movement is slow due to the damping action associated with the compression of the high-pressure nitrogen gas 62, and even if the tip of the plunger 45 comes into contact with the head body 74 of the thermal decomposition unit 44, no impact force is generated by the contact.

  For this reason, the mechanical impact force is applied to the thermal decomposition part 44 due to the movement of the piston 24 on the open side accompanying the rapid water filling with respect to the primary port 14, and it is ensured that the leakage or the like occurs due to distortion or deformation. Can be prevented. As a result, even if the closed head used for the thermal decomposition unit 44 has, for example, a simple structure that easily causes water leakage due to impact force, the present embodiment is used as the thermal decomposition unit 44 without any problem. can do.

  FIG. 12 is an explanatory view showing another embodiment of the water discharge joint according to the present invention. Instead of sealing the sealing liquid 30 in the second cylinder chamber 28 in the embodiment of FIG. A buffering spring 82 is disposed between the head valve body 76 and the head valve body 76.

  Even in this embodiment, when the pressurized fire-extinguishing water is rapidly filled as indicated by the arrow A from the fire pump system to the primary port 14 of the water discharge joint 10 by the water supply pipe 16, the piston 24 will move to the open side. However, the movement is restrained by the spring 82 and hardly moves, and the closed state of the communication path 32 by the valve body 34 is maintained, so that it is possible to reliably prevent erroneous discharge from the open-type head 20 due to rapid water filling. .

  Even if the plunger moves, the impact of the plunger tip against the thermal decomposition part can be reduced by the buffering action of the spring, so that the thermal decomposition part can be prevented from being deformed.

  On the other hand, when the glass bulb 80 is destroyed due to the thermal airflow caused by the fire at the thermal decomposition unit 44, the head valve body 76 is detached and the thermal port 38 is opened, and the piston 24 is heated from the primary port 14. It is pushed by the pressure-extinguishing water pressure and moves to a position where it abuts on the connecting member 40, whereby the valve body 34 is detached from the communication path 32, and the fire-extinguishing water is supplied from the primary port 14 to the secondary port 18 and opened Fire extinguishing water can be discharged from the mold head 20.

  Here, in the water discharge joint 10 of the present embodiment shown in FIGS. 1, 6, 8, 11, and 12, it is insufficient to directly receive the hot air flow at the place where the open type head 20 is installed. Used when there is an obstacle, installed so that the thermal decomposition part 44 of the water discharge joint 10 is located at a position where the thermal air flow away from the installation place close to the obstacle of the open type head 20 is properly received, The open head 20 is connected via a head pipe 21 so that an appropriate thermal air flow sensing position and a water discharge position by the open head 20 can be separated.

  Depending on the installation location, installation with the thermal decomposition unit 44 facing downward as shown in FIG. 1 or FIG. 6 or installation with the thermal decomposition unit 44 facing upward as shown in FIG. 8 or FIG. You can choose. Depending on the installation location, it may be turned 90 degrees.

  Further, from the installation relationship between the water supply pipe 16 and the head pipe 21, the primary port 14 is in the horizontal direction, the secondary port 18 is in the vertical direction, as shown in FIG. 1 or FIG. 6, or the primary port is shown in FIG. An appropriate installation direction in which 14 is in the vertical direction and the secondary port 18 is in the horizontal direction can be handled as necessary. Further, depending on the installation form, the open-type head 20 may be directly set to the secondary port without using the pipe 2.

  In the above embodiment, a case where a closed head having a simple structure that easily causes water leakage when subjected to a mechanical impact force is used for the thermal decomposition unit 44 is taken as an example. For example, a closed type head having a structure in which a head valve body is incorporated in an open type by a seal with an O-ring may be used.

  That is, in the present embodiment, a closed head that is weak against mechanical shock can be used for the thermal decomposition unit 44, but a closed head that is resistant to mechanical shock is used as the thermal decomposition unit 44. It does not prevent you from using it.

  Further, the closed head used in the thermal decomposition section of the present invention is not limited to the structure shown in the above embodiment, and it is needless to say that a closed head having an appropriate structure can be used.

  The length of the plunger 45 may be changed so that the second lift amount L2 can be adjusted according to the structure of the head attached as the thermal decomposition part.

  The means for encapsulating the encapsulating medium is not limited to the injection hole 25, and the encapsulating medium is first introduced from the thermal port 38 before connecting the thermal decomposing unit 44 to the connecting member 40, and then the thermal decomposing unit 44. May be assembled and sealed.

Further, the present invention includes appropriate modifications that do not impair the object and advantages thereof.

Sectional drawing which showed embodiment of the water discharge joint by this invention Sectional view showing the thermal decomposition part of FIG. Sectional view showing the injection valve of FIG. Explanatory drawing which showed the operation | movement at the time of rapidly filling pressurized fire extinguishing water to embodiment of FIG. Explanatory drawing which showed the operation | movement which a thermosensitive decomposition | disassembly part decomposes | disassembles and discharges in the state of FIG. Explanatory drawing which showed the operation | movement at the time of rapidly filling pressurized fire-extinguishing water in the state which enclosed high pressure nitrogen gas in embodiment of FIG. Sectional drawing which showed the operation of the stable steady state after the quick water filling of FIG. 6 was completed Sectional drawing which showed other 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 to embodiment of FIG. Explanatory drawing which showed the operation | movement which a thermal decomposition part decomposes | disassembles and discharges in the state of FIG. Explanatory drawing which showed the operation | movement at the time of rapidly filling the water for pressurized fire extinguishing in the state which enclosed high pressure nitrogen gas in embodiment of FIG. Sectional drawing which showed other embodiment of the water discharge joint by this invention Sectional view showing a conventional water discharge joint

Explanation of symbols

10: Water discharge joint 12: Joint body 14: Primary port 16: Water supply pipe 18: Secondary port 20: Open type head 21: Head pipe 22: Cylinders 23, 36, 42: O-ring 24: Piston 25: Injection valve 26 : First cylinder chamber 28: Second cylinder chamber 30: Filled liquid 32: Communication path 34: Valve body 38: Thermal port 40: Connection member 44: Thermal decomposition unit 45: Plunger 46: Head body 47: Body 48: Head valve Body 50: Ball 51: Support ring 52: Slider 55: Coil spring 56: Deflector 57: Stopper 58: Low temperature solder 59: Set bolt 60, 84: Heat collecting plate 61: Valve chamber 62: High pressure nitrogen gas 64: Valve body 66 : Knob 67: Seal packing 68: Stopper ring 70: Spring 72: Injection hole 74:: Head body 76: Head valve body 78: Washer 80: Rasubarubu 82: screw 84: spring

Claims (4)

A cylinder formed inside the body,
A piston that is slidably disposed in the cylinder and partitions the cylinder into a first cylinder chamber and a second cylinder chamber;
A primary port that communicates with the first cylinder chamber and supplies pressurized fire-fighting water;
A secondary port located in the first cylinder chamber to which a watering head is connected;
A thermal port communicating with the second cylinder chamber;
A thermal decomposition part that is attached to the thermal port and closed, and decomposes when receiving a hot air current to open the thermal port;
Formed on the first cylinder chamber side of the piston, provided at a position to close the flow path communicating the primary port and the secondary port, the piston moves to the second cylinder chamber side beyond the first lift amount A valve body that opens a flow path communicating the primary port and the secondary port when
A plunger that is formed on the second cylinder chamber side of the piston, and restricts the valve body to be movable from a closed position by a second lift amount smaller than the first lift amount in a closed state of the heat sensitive port;
The second cylinder chamber and the heat-sensitive port in the closed state are filled, and the movement of the piston when the fire-extinguishing water is charged and pressurized from the primary port to the first cylinder chamber is within the second lift amount. An encapsulating medium that suppresses and releases the sealing when the thermal port is opened by the operation of the thermal decomposition unit, and moves the piston beyond the first lift amount to open the valve body;
A water discharge joint characterized by comprising:
The water discharge joint according to claim 1, wherein the encapsulating medium is an aqueous solution mixed with oil or an antifreezing agent.
2. The water discharge joint according to claim 1, wherein the sealing medium is a high-pressure inert gas.
  The water discharge joint according to claim 1, wherein the sealing medium is a spring.

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