JP3610468B2 - Sprinkler fire extinguishing equipment with simultaneous opening valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sprinkler fire extinguishing equipment having a simultaneous opening valve .
[0002]
[Prior art]
Conventionally, various types of sprinkler fire extinguishing equipment such as wet, pre-actuated and wet pre-actuated are known. 4 to 6 are system diagrams of these wet, pre-actuated and wet pre-actuated sprinkler fire extinguishing equipments. FIG. 4 is a wet type, FIG. 5 is a pre-actuated type, and FIG. Each is shown.
As shown in FIG. 4, in the wet process, a closed sprinkler head 105 is installed on the front end side of the water supply pipe 103 connected to the fire extinguishing water tank 100, and the inside of the water supply pipe 103 is always filled with fire extinguishing water. When the sprinkler head 105 is opened by the heat of the fire, the fire extinguishing water is discharged from the sprinkler head 105 to extinguish the fire.
A water flow detection device 107 having a check valve structure is provided on the secondary side of the water supply pipe 103, and a water flow signal from the water flow detection device 107 is input to the control panel 109 to confirm water discharge from the sprinkler head 105. It was.
[0003]
In addition, as shown in FIG. 5, the pre-operation type is provided with an open valve 113 called a pre-operation valve in the middle of the water supply pipe 111 connected to the fire-extinguishing water tank 100, and a high-pressure fire extinguishing is provided on the primary side of the water supply pipe 111. Water is filled, pressurized air is sealed on the secondary side, a closed sprinkler head 105 is provided at the tip of the secondary side, and a fire detector 115 is installed in addition to the closed sprinkler head 105 It is. Then, the open valve 113 is opened by the operation of the fire detector 115 due to a fire to fill the closed sprinkler head 105 with extinguishing water, and further, the closed sprinkler head 105 is opened by the heat of the fire to discharge water. It is.
Further, a water flow detection device 107 is provided on the secondary side of the open valve 113 of the water supply pipe 111, and a water flow signal from the water flow detection device 107 is input to the control panel 117 to confirm water discharge from the sprinkler head 105. .
[0004]
The wet pre-actuation type is disclosed in Japanese Patent Publication No. 7-12382, and an open valve 121 referred to as a pre-actuation valve is provided in the middle of the water supply pipe 119 connected to the fire extinguishing water tank 100, and the water supply pipe 119 is provided. The primary side is filled with high-pressure fire-extinguishing water, the secondary side is filled with low-pressure fire-extinguishing water, a closed sprinkler head 105 is provided at the tip of the secondary side, and the water supply pipe 119 A pressure switch 123 is installed on the secondary side, and a fire detector 115 is installed. Then, when both the fire signal due to the operation of the fire detector 115 due to fire and the signal of the pressure switch 123 notifying the pressure drop on the secondary side due to the opening of the closed sprinkler head 105 are output, the release valve 121 is output. Is to release.
Further, it is presumed that the water flow detection device 107 is provided on the secondary side of the release valve 121, and the water flow signal from the water flow detection device 107 is input to the control panel 125 to confirm the water discharge from the sprinkler head 105.
[0005]
[Problems to be solved by the invention]
However, the above-described wet, pre-actuated and wet pre-actuated sprinkler fire extinguishing facilities have the following problems.
First, the wet problems will be described. In the case of the wet type, a maximum pressure of 10 kgf / cm ² is constantly applied in the pipe to the sprinkler head 105. In addition, since a check valve is installed in the middle of the water supply pipe 103, water hammer generated when the pump is started / stopped or when water discharge is started / stopped in other areas can easily enter the secondary side of the check valve. The pressure in the secondary side pipe may become high. Moreover, due to the structure of the check valve, once the pressure becomes high, the high pressure state is maintained, and excessive stress may be applied to the secondary side piping. Furthermore, the pressure in the secondary side pipe may become an abnormally high pressure due to the expansion of the volume of the fluid in the secondary side pipe due to a change in the environmental temperature.
For this reason, the secondary side piping in the conventional wet sprinkler fire extinguishing equipment has a risk of pipe breakage and water leakage due to breakage of pipe material and deterioration of strength due to creep during long-term use. Moreover, since there existed such a situation, there also existed a problem that the resin piping with low pressure resistance could not be used, and the cost reduction by use of resin piping could not be implement | achieved.
[0006]
Also, since in the case of pre-activated is to monitor the pressure within the secondary side piping ^{1kgf / cm 2 ~2kgf / cm 2} , there is no problem of deterioration in strength as described in wet, the resin pipe or the like Since the material has a problem in heat resistance as compared with the steel pipe, it can be used only when filling the pipe with water and cannot be applied to a pre-acting type in which air is sealed in the pipe. In addition, the pre-acting type requires an air pressurization device (compressor), and the number of simultaneous opening is 1.5 times that of the wet type. is there.
[0007]
Further, in the case of a wet pre-actuated type, the release valve 121 is opened only by both the operation of the fire sensor 115 and the operation of the pressure switch 123. Therefore, for example, a fire is directly under the sprinkler head 105. Even when the sprinkler head 105 is generated and the sprinkler head 105 is opened, there is a risk that a fire extinguishing delay occurs because the release valve 121 does not open until the fire detector 115 is activated. This problem also applies to the aforementioned pre-actuation type.
[0008]
In addition, the above-mentioned wet, pre-actuated and wet pre-actuated water flow detection devices can be used for extinguishing water when the check valve 107 or the open valves 113, 121 are opened to the check valve 107 or the open valves 113, 121. Is provided with a small hole through which fire extinguishing water flows into the small hole is detected by a pressure switch or the like, and a signal from the pressure switch is output as a flowing water signal. For this reason, there is a problem that the structure is complicated and the cost is increased accordingly.
[0009]
The present invention has been made in order to solve such a problem, and a piping with low pressure resistance such as a resin can be used as a secondary side piping, equipment is relatively simple, and there is a risk of delay in water discharge. The aim is to provide no sprinkler fire extinguishing equipment. Moreover, it aims at providing the sprinkler fire extinguishing equipment which can detect a flowing water with a simple structure.
[0010]
[Means for Solving the Problems]
The sprinkler fire extinguishing equipment having the simultaneous opening valve according to the present invention has the following configuration. That is, a primary chamber, a secondary chamber, a cylinder chamber, and a valve body that is seated on a valve seat to partition the primary chamber and the secondary chamber, and is movably disposed in the cylinder chamber, In a sprinkler fire extinguishing equipment having a simultaneous release valve that opens when the pressure in the secondary side pipe communicating with the secondary chamber drops, the valve element is opened when the pressure in the secondary side pipe drops. A valve opening lock mechanism for holding the state is provided, the valve opening lock mechanism is provided in the valve body, the communication pipe that communicates the cylinder chamber and the primary chamber, and when the simultaneous release valve is opened, The open end of the communicating pipe is in contact with the sealing body that closes the tip opening of the communicating pipe .
[0011]
The cylinder chamber is provided with an inner cylinder movable in the vertical direction, and the seal body is provided below the inner cylinder.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a system diagram of an embodiment of the present invention. As shown in the figure, the system of the present embodiment is provided in the middle of a water supply pipe 31 connected to a fire extinguishing water tank 30, and the simultaneous open valve 1 that partitions the water supply pipe 31 into a primary side pipe and a secondary side pipe. The closed-type sprinkler head 35 provided at the tip of the secondary side pipe of the water supply pipe 31 is monitored so that the pressure in the secondary side pipe does not become higher than a predetermined value, and the simultaneous release valve 1 is opened. A monitoring control valve 40 having a function as a start valve for monitoring, a monitoring valve 60 for monitoring so that the pressure in the secondary side pipe does not drop below a predetermined value, and a secondary side pipe of the water supply pipe 31; The main component is a pressure switch 90 that notifies a disaster prevention panel (not shown) that the pressure of the side pipe has dropped below a predetermined value. Reference numeral 91 denotes a test valve.
[0018]
First, the configuration of the simultaneous release valve 1 will be described. In FIG. 1, 3 is a valve box of the simultaneous opening valve 1, and the inside of the valve box 3 includes a cylinder chamber 7 in which a disc 6 having a function as a valve body is installed, a primary chamber 9 communicating with a primary side pipe, and It is partitioned into a secondary chamber 11 communicating with the secondary side piping.
The disc 6 is configured to be slidable along the inner wall of the cylinder chamber 7, and a seal member 13 made of an elastic body such as rubber for partitioning the primary chamber 9 and the cylinder chamber 7 is installed on the outer peripheral portion thereof. ing. Further, the lower end portion (right end portion in the figure) of the disc 6 is configured to be able to come into contact with a valve seat 14 that partitions the primary chamber 9 and the secondary chamber 11. In addition, a communication pipe 15 having one end connected to the inner wall of the disk 6 and having the other end opened toward the upper surface of the valve box 3 is provided inside the disk 6, and the cylinder chamber 7 and the primary chamber 9 are connected to each other. 15 communicates.
[0019]
The communication pipe 15 is provided with a check valve 17 that enables only the flow from the primary chamber 9 to the cylinder chamber 7. The disc 6 is urged in a direction to be always closed by a spring 19 installed in the cylinder chamber 7.
Reference numeral 21 denotes a valve opening lock mechanism which is provided in the cylinder chamber 7 and holds the disc 6 in the raised state and keeps the opened state when the disc 6 is lifted (moved to the left in the figure). The valve opening lock mechanism 21 includes an outer cylinder 23a, an inner cylinder 23b installed inside the outer cylinder 23a so as to be movable in the vertical direction (left-right direction in the figure), and an inner cylinder 23b installed inside the inner cylinder 23b. A spring 25 that biases the inner cylinder 23b downward when the 23b is pushed upward, and a seal body 27 that is provided at the lower end of the inner cylinder 23b and abuts the open end of the communication pipe 15 are provided. The operation of the valve opening lock mechanism 21 will be described later.
[0020]
FIG. 2 is an enlarged sectional view of the monitoring control valve 40. Next, the configuration of the monitoring control valve 40 will be described with reference to FIG. The monitoring control valve 40 includes a main body 41 and a lid body 43. The main body 41 communicates with the first chamber 45 that communicates with the secondary chamber 11 side, the second chamber 47 that communicates with a drain pipe (not shown), and communicates with the first chamber 45 and the simultaneous opening valve. The third chamber 49 communicates with one cylinder chamber 7. In addition, the inside of the lid body 43 is a cavity, and a bellophram 51 is installed between the cavity and the first chamber 45 of the main body 41 so as to partition the both.
[0021]
The communicating portion of the first chamber 45 and the second chamber 47 is reduced in diameter, and a packing 53 is installed in the reduced diameter portion. Further, a seal body 55 that blocks the communication portion is provided in the third chamber 49 so as to be movable at the communication portion between the second chamber 47 and the third chamber 49. It is urged in the direction to block the communication part.
[0022]
Further, inside the main body 41, a base 57 is installed on the bellowram 51, and a piston 57 is installed on the distal end side through the first chamber 45 to the second chamber 47. The base end side of the piston 57 is set to be approximately the same diameter as the communication portion of the first chamber 45 and the second chamber 47, and the tip end side is set to be smaller than this. In a normal state (when the bellophram 51 is not deformed), the large diameter portion is located at the communication portion between the first chamber 45 and the second chamber 47. In this state, the piston 57 is large. The diameter portion and the packing 53 are in close contact with each other, whereby the first chamber 45 and the second chamber 47 are completely partitioned.
[0023]
In addition, a spring 59 having one end connected to the upper end of the lid 43 and the other end connected to the bellophram 51 is installed in the cavity of the lid 43. The spring 59 has an action of biasing the bellophram 51 in a direction to return it to the original state when the bellophram 51 is deformed.
The operation of the monitoring control valve 40 will be described later.
[0024]
FIG. 3 is an enlarged sectional view of the monitoring valve 60. Next, the configuration of the monitoring valve 60 will be described based on FIG. The monitoring valve 60 includes a main body 61 and a lid body 63. The main body 61 includes a first chamber 65 that communicates with the secondary chamber 11 and a second chamber 67 that communicates with the first chamber 65 and communicates with the primary chamber 9. The inside of the lid 63 is hollow, and a bellophram 71 is installed between the hollow and the first chamber 65 of the main body 61 so as to partition the both.
[0025]
The communication portion between the first chamber 65 and the second chamber 67 has a reduced diameter, and a seal body 75 that blocks the communication portion is movably provided in the second chamber 67 at the reduced diameter communication portion. The seal body 75 is always urged by a spring 76 in a direction to block the communication portion.
[0026]
Further, inside the main body 61, a base 77 is installed on the bellowram 71, and a piston 77 extending on the tip side through the first chamber 65 to the communication portion with the second chamber 67 is installed. The piston 77 is set to have the same diameter over its entire length, and the diameter is set to be smaller than the diameter of the communication portion between the first chamber 65 and the second chamber 67.
As shown in the figure, the pinton 77 is selected so that its tip does not hit the seal body 75 when the bellophram 71 is not displaced.
[0027]
In addition, a spring 79 having one end connected to the upper end of the lid 63 and the other end connected to the bellophram 71 is installed in the cavity of the lid 63. The spring 79 has an action of urging in a direction to return the bellophram 71 when it is deformed. The pressure of the secondary chamber 11 is set by the springs 59 and 79. That is, the upper limit value of the pressure in the secondary chamber 11 is set by the spring 59, and the lower limit value of the secondary chamber 11 is set by the spring 79.
The operation of the monitoring valve 60 will be described later.
[0028]
Next, the operation of the present embodiment configured as described above will be described with reference to FIGS. In a normal monitoring state, the primary chamber 9, the cylinder chamber 7, and the secondary chamber 11 of the simultaneous opening valve 1 are filled with extinguishing water as a pressure liquid, and the water pressure in the primary chamber 9 is changed to P ₁ , the secondary pressure. When the water pressure in the chamber 11 is P ₂ and the water pressure in the cylinder chamber 7 is P ₃ , the relationship is set to satisfy P ₁ = P ₃ > P ₂ . The reason why P ₁ = P ₃ is that the primary chamber 9 and the cylinder chamber 7 communicate with each other via a communication pipe 15 provided in the disc 6.
[0029]
Incidentally, the water pressure P ₁ of the primary chamber 9 and the pressure P ₂ of the secondary chamber 11 acts in a direction (valve opening direction) to push up the disuccinimidyl 6, pressure P ₃ of the cylinder chamber 7 acts in a direction to push down the disuccinimidyl 6 . Therefore, the force P _d acting in the direction of pushing down the disc 6 is the sum of the force obtained from the product of the water pressure P ₃ and the effective area and the urging force of the spring 19, and conversely acts in the direction pushing up the disc 6. The force P _u is a force obtained from the product of the water pressure P ₁ and the water pressure P ₂ and their effective areas. In the monitoring state, the relationship P _d > P _u exists, and the disc 6 is pushed down and seated on the valve seat 14.
Therefore, the primary chamber 9 side and the secondary chamber 11 side are completely partitioned by the disc 6 so that a change in pressure on the primary chamber 9 side is not transmitted to the secondary chamber 11 side.
[0030]
Further, the first chamber 45 of the monitoring control valve 40 is filled with fire extinguishing water having the same pressure as the secondary chamber 11 side, and in this state, the belofram 51 maintains a flat state as shown in FIG. . The second chamber 47 is partitioned from the first chamber 45 by the piston 57, and the third chamber 49 is partitioned from the second chamber by the seal body 55.
[0031]
Further, the first chamber 65 of the monitoring valve 60 is filled with fire extinguishing water having the same pressure as the secondary chamber 11 side, and in this state, the belofram 71 maintains a flat state as shown in FIG. . Further, the second chamber 67 is filled with fire extinguishing water having the same pressure as the primary chamber 9, and the second chamber 67 and the first chamber 65 are blocked by the seal body 75.
[0032]
In the monitoring state as described above, for example, an operation when the pressure on the secondary chamber 11 side increases due to a change in environmental temperature or the like will be described. When the pressure on the secondary chamber 11 side rises, the pressure in the first chamber 45 of the monitoring control valve 40 communicating with the secondary chamber 11 side rises, and the lid 51 is resisted against the biasing force of the spring 59. It will be pushed to the 43 side. When the bellophram 51 is pushed to the lid body 43 side, the piston 57 is also moved to the lid body 43 side. When the piston 57 moves by a predetermined amount or more, the small diameter portion of the piston 57 is positioned at the communication portion between the first chamber 45 and the second chamber 47.
[0033]
In this state, a gap is formed between the piston 57 and the communication portion, and the fire extinguishing water in the first chamber 45 flows into the second chamber 47 and flows out to a drain pipe (not shown). When drainage from the second chamber 47 is performed and the pressure in the first chamber 45, that is, the pressure on the secondary chamber 11 side, falls below a predetermined value, the bellophram 51 is pushed back by the spring 59, and the piston 57 is moved in the distal direction along with this. Move to. When the piston 57 moves by a predetermined amount or more, the large diameter portion of the piston 57 is again positioned at the communication portion between the first chamber 45 and the second chamber 47. In this state, the gap between the piston 57 and the communication portion is closed, and the fire extinguishing water in the first chamber 45 cannot move to the second chamber 47, and the drainage is stopped.
Thus, in the monitoring state, when the pressure on the secondary chamber 11 side increases, the operation of automatically reducing the pressure by draining the fire water on the secondary chamber 11 side is performed. The pressure on the chamber 11 side is not maintained higher than a predetermined value for a long time, and there is no risk that the piping or the like is broken due to fatigue or the like.
[0034]
Next, an operation when water leakage or the like occurs in the piping on the secondary chamber 11 side and the pressure on the secondary chamber 11 side decreases will be described. When the pressure on the secondary chamber 11 side decreases, the pressure on the first chamber 65 of the monitoring valve 60 communicating with the secondary chamber 11 side decreases, and the bellowram 71 is biased by the spring 69 to the second chamber 67 side. Will be convexly deformed. When the bellophram 71 is convexly deformed to the second chamber 67 side, the piston 77 is also moved to the second chamber 67 side. When the piston 77 moves by a predetermined amount or more, the tip of the piston 77 pushes down the seal body 75 against the urging force of the spring 76.
[0035]
When the seal body 75 is pushed down, the first chamber 65 and the second chamber 67 communicate with each other. When the first chamber 65 and the second chamber 67 communicate with each other, the second chamber 67 communicates with the primary chamber 9. High pressure water flows into the first chamber 65 side. When high-pressure water flows into the first chamber 65 and the pressure in the first chamber 65, that is, the pressure on the secondary chamber 11 side recovers to a predetermined value, the bellophram 71 is moved to the lid 63 side by the pressure of the fire-extinguishing water in the first chamber 65. As a result, the piston 77 moves in the proximal direction. When the piston 77 moves by a predetermined amount or more, the tip of the piston 77 moves away from the seal body 75, the communication portion between the first chamber 65 and the second chamber 67 is shut off, and the first chamber of the fire extinguishing water in the second chamber 67 is shut off. Inflow to the 65 side is stopped.
Thus, in the monitoring state, when the pressure on the secondary chamber 11 side decreases, the fire pressure water on the primary chamber 9 side is automatically supplied to the secondary chamber 11 side to automatically increase the pressure on the secondary chamber 11 side. Can be recovered. Therefore, the pressure on the secondary chamber 11 side does not become lower than a predetermined value for a long time, and the pressure switch 90 does not operate due to a pressure drop due to piping leakage or the like.
[0036]
Next, an operation when a fire occurs from the above monitoring state will be described. When closed sprinkler head 35 fire occurs and extinguishing water opened is water discharge by the heat of a fire, the pressure P ₂ of the secondary chamber 11 side pressure switch 90 outputs a pressure drop signal decreases. Thus, since the pressure drop on the secondary chamber 11 side can be used as a running water signal, an extremely simple device can be used and the cost can be reduced. In this way, the pressure drop signal of the pressure switch 90 provided in the piping on the secondary chamber 11 side can be used as a running water signal, that is, a signal indicating that the simultaneous release valve 1 has been opened. This is because the secondary chamber 11 side is partitioned by a simultaneous opening valve, and the secondary chamber 11 side is filled with a low-pressure fluid, and the simultaneous opening valve 1 is opened when the pressure of the low-pressure fluid decreases.
In this regard, in the case of the conventional wet type, the primary side and the secondary side of the check valve are basically at the same pressure, and there is no significant drop in pressure even after the sprinkler is opened. A simple configuration in which a pressure switch is provided in the secondary side pipe cannot be employed.
[0037]
In addition, in the case of pre-actuated and wet pre-actuated systems, the release valve does not open unless there is a fire signal from the fire detector, so the pressure drop on the secondary side does not necessarily coincide with the release of the open valve. Therefore, even if a pressure switch is simply provided on the secondary side pipe, the signal of this pressure switch cannot be used as a flowing water signal, and a pressure switch is provided on the secondary side pipe as in this embodiment. It is not possible to adopt such a simple configuration.
[0038]
Returning to the explanation of the operation, when the pressure on the secondary chamber 11 side decreases, the fire extinguishing water on the primary chamber 9 side is supplied to the secondary chamber 11 side via the monitoring valve 60 as described above.
However, since the amount of water discharged from the closed sprinkler head 35 is much larger than the amount of fire water supplied to the secondary chamber 11 via the monitoring valve 60, the pressure on the secondary chamber 11 side does not recover.
[0039]
When the pressure on the secondary chamber 11 side decreases, the pressure in the first chamber 45 of the monitoring control valve 40 communicating with the secondary chamber 11 decreases. When the pressure in the first chamber 45 decreases, the belofram 51 is convexly deformed toward the second chamber 47 by the biasing force of the spring 59. When the bellophram 51 is convexly deformed to the second chamber 47 side, the piston 57 is also moved to the third chamber 49 side. When the piston 57 moves by a predetermined amount or more, the tip of the piston 57 pushes down the seal body 55 against the urging force of the spring 56.
[0040]
In a state where the seal body 55 is pushed down, the second chamber 47 and the third chamber 49 communicate with each other. When the second chamber 47 and the third chamber 49 communicate with each other, the high-pressure water in the third chamber 49 communicating with the cylinder chamber 7 of the simultaneous release valve 1 flows into the second chamber 47 side to a drain pipe (not shown). And leaked. When extinguishing water cylinder chamber 7 of simultaneous opening valve 1 is drained via the monitoring control valve 40, the pressure of the cylinder chamber 7 is reduced, than the force P _u force P _d depressing the disuccinimidyl 6 pushes up the disuccinimidyl 6 The disc 6 is raised, the disc 6 is raised, the lower end of the disc 6 is separated from the valve seat 14, and the simultaneous release valve 1 is opened.
[0041]
When the simultaneous opening valve 1 is opened, high-pressure water on the primary chamber 9 side flows into the secondary chamber 11 side via the valve seat 14 and is discharged from the closed sprinkler head 35 as fire extinguishing water. By the way, when high-pressure water on the primary chamber 9 side flows into the secondary chamber 11 side via the valve seat 14, the pressure on the secondary chamber 11 side rises, and as described in the above description of the monitoring control valve 40, the piston 57 moves to the lid 43 side. When the piston 57 moves to the lid body 43 side, the tip of the piston 57 moves away from the seal body 55, the second chamber 47 and the third chamber 49 are shut off, and the drainage of the pressure water in the cylinder chamber 7 is stopped. It will be. Note that it is preferable to restrict the flow rate by providing an orifice or the like in the drain pipe connected to the second chamber 47 of the monitoring control valve 40. By doing in this way, even if the pressure of secondary side piping increases at the time of water discharge, the quantity of the water which flows into the drain pipe through the 2nd chamber 47 can be restrict | limited.
[0042]
However, when the disc 6 is raised by a predetermined amount, the tip of the communication pipe 15 comes into contact with the seal body 27 of the valve opening lock mechanism 21 and closes the tip opening of the communication pipe 15. When the opening of the communication pipe 15 is blocked, the high-pressure water in the primary chamber 9 cannot flow into the cylinder chamber 7 and the pressure in the cylinder chamber 7 does not increase. Therefore, even if the second chamber 47 and the third chamber 49 of the monitoring control valve 40 are shut off and the drainage of the pressure water in the cylinder chamber 7 is stopped, the force P _d that pushes down the disc 6 is the force P that pushes up the disc 6. It does not become larger than _u , and the simultaneous opening valve 1 maintains the valve open state.
[0043]
Note that the simultaneous opening valve 1 of the present embodiment has been shown to be opened by the balance between the hydraulic pressure of the primary chamber 9, the secondary chamber 11, and the cylinder chamber 7 and the force of the spring 19, but instead of this, a pressure switch 90 is used. A motor-operated valve that opens in conjunction with the operation of may be used.
Further, in the above embodiment, the material of the piping on the secondary chamber 11 side is not particularly limited, but as described above, the secondary chamber 11 side is always kept at a low pressure in the monitoring state. Piping made of a material having low pressure resistance such as resin can be used.
[0044]
【The invention's effect】
Since the present invention is configured as described above, when the simultaneous release valve is opened, the front end opening of the communication pipe can be blocked by the sealing body, and the high pressure water in the primary chamber 9 is prevented from flowing into the cylinder chamber 7. It is possible to prevent the pressure in the cylinder chamber from increasing. For this reason, the force which pushes down a valve body does not become larger than the force which pushes up a valve body, and can hold | maintain the valve open state of a simultaneous release valve.
[Brief description of the drawings]
FIG. 1 is a system diagram of an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of a part used in an embodiment of the present invention.
FIG. 3 is an enlarged sectional view of a part used in an embodiment of the present invention.
FIG. 4 is a system diagram of a conventional wet sprinkler fire extinguishing facility.
FIG. 5 is a system diagram of a conventional pre-actuated sprinkler fire extinguishing facility.
FIG. 6 is a system diagram of a conventional wet pre-actuated sprinkler fire extinguishing facility.
[Explanation of symbols]
1 Simultaneous opening valve 6 Disc 7 Cylinder chamber 9 Primary chamber 11 Secondary chamber 14 Valve seat 31 Water supply pipe 35 Closed sprinkler head 40 Monitoring control valve 60 Monitoring valve 90 Pressure switch

Claims (2)

A primary chamber, a secondary chamber, a cylinder chamber, a valve body that is seated on a valve seat, partitions the primary chamber and the secondary chamber, and is movably disposed in the cylinder chamber; In the sprinkler fire extinguishing equipment having a simultaneous release valve that opens when the pressure in the secondary pipe communicating with the next chamber drops,
When the pressure in the secondary side pipe is reduced, a valve opening lock mechanism is provided to hold the opened state of the valve body,
The valve opening lock mechanism is
A communication pipe provided in the valve body and communicating the cylinder chamber and the primary chamber;
A sprinkler fire extinguishing equipment having a simultaneous release valve, comprising: a seal body that contacts an opening end of the communication pipe when the simultaneous release valve opens and closes a distal end opening of the communication pipe . In the cylinder chamber, an inner cylinder that is movable in the vertical direction is provided,
The sprinkler fire extinguishing equipment having a simultaneous release valve according to claim 1 , wherein the sealing body is provided on the lower side of the inner cylinder .

Images