JPS6348289Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an automatic fire extinguishing system for simultaneously opening floating roof tanks. To provide an automatic fire extinguishing system that can quickly and reliably extinguish fires all at once from nozzles.

Conventionally, a floating roof tank has been provided with a plurality of opening nozzles around its periphery to eject a large number of extinguishing agents. This opening nozzle is literally always open, so the extinguishing agent does not reach this opening nozzle at all times, and is kept on standby in the middle of the piping. It is said that the limit is up to the on-off valve. Therefore, when a fire is detected, it is necessary to open this on-off valve in order to forcefully send the extinguishing agent that has reached this on-off valve to the opening nozzle. A small number of on-off valves may be sufficient, but large-scale equipment requires a large number of on-off valves. In order to automatically open the on-off valve in conjunction with the detection of a fire, the system disclosed in Japanese Utility Model Publication No. 49-14076, for example, has been proposed. As schematically shown in Fig. 1, this automatic fire extinguishing system has a fire extinguishing pipe A with a large number of spouts and a detection pipe B with a detection nozzle installed in parallel, and this detection pipe B and a carbon dioxide gas , a pressure gas container C containing a pressure gas such as nitrogen gas, and a pipe D.
An automatic switching three-way valve E is provided in the middle of the connection. Further, the fire extinguishing pipe A and a fire extinguishing agent container F containing a fire extinguishing agent such as fluorinated ethane are connected by a pipe G, and an on-off valve H is provided in the middle thereof. The automatic switching three-way valve E is connected on one side to the pressure gas container C, on the other hand to the detection pipe B, and on the other hand to the pipe J; F, and the other is connected to an on-off valve H, respectively. The pressure gas in the pressure gas container C is detected by the detection pipe B.
Although the detection nozzle is always filled with water, it does not flow into the pipe J connected to the automatic switching three-way valve E. now,
If a fire occurs, the pressure gas in the detection pipe B is lost and the pressure decreases, causing the three-way valve E to operate and pressurized gas to be sent only in the direction of the pipe J, and this increase in pressure causes the opening/closing valve to At the same time as opening H, pressure is applied to the extinguishing agent in the extinguishing agent container F, and the extinguishing agent is force-fed and ejected from the spout.

However, this requires two types of containers, an extinguishing agent container and a pressurized gas container, and also requires two types of piping, one for detecting the fire and the other for spraying the extinguishing agent, which makes the piping system complicated and makes frequent inspections and repairs on the floating roof, which is difficult to work on, a considerable burden. Naturally, this complex piping and valves, which are exposed to the harsh weather conditions of the four seasons and installed on the floating roof, can malfunction due to rust and dust, or constantly leak expensive halon-based extinguishing agent, causing major losses. As a result, there is still no automatic fire extinguishing device that is worthy of recommendation.

In view of these points, the inventor of the present invention has devised a system that can safely and accurately detect a fire, thereby quickly and reliably extinguishing fire all at once from the open nozzle, and that also simplifies the overall structure and facilitates inspection and repair. In order to obtain an automatic fire extinguishing system that can be opened all at once, as a result of various studies, we arranged a fire extinguishing pipe with an opening nozzle and a sensing pipe with a sensing nozzle almost in parallel around the periphery of the floating roof, and A pressure storage tank is installed on the floating roof to store a fire extinguishing agent below and a pressure gas above it, and the bottom opening of this pressure storage tank and the fire extinguishing pipe are connected by a distribution pipe to reduce the pressure. The extinguishing agent pressurized by gas was passed through the pipe, and information processing holes were opened at appropriate positions in the distribution pipe, and the inlet side was sealed with a valve body with a cutter, and the outlet side was sealed with a sealing plate. A simultaneous release valve having a valve chamber is provided, and the upper opening of the pressure-resistant storage tank and the sensing piping are connected by a sensing and information transmission piping, and the pressure gas is filled with the sensing and information transmission piping. A leak valve having a leak hole through which a small amount of the pressure gas can pass through at any time is provided at an appropriate position of the service piping, and furthermore, a leak valve having a leak hole through which a small amount of the pressure gas can always pass is provided at an appropriate position in the sensing and information transmission piping between the leak valve and the sensing piping. By connecting the information receiving hole of the simultaneous release valve with the information transmission piping, the pressure in the sensing and information transmission piping is prevented from decreasing due to the ejection of pressure gas when the sensing nozzle detects a fire. It stops at the leak hole of the leak valve, preventing the pressure drop to reach the pressure storage tank, and this pressure drop passes through the information reception hole through the information transmission pipe that branches from the sensing and information transmission pipe, and reaches into the valve chamber. Therefore, by sliding the valve body and destroying the sealing plate with its cutter, the blocked passage for the pressurized extinguishing agent is opened, and the extinguishing agent is spouted all at once from the open nozzle. By using an open automatic fire extinguishing system, the purpose can be well achieved and the present invention has been achieved.

Next, an example of implementing the present invention will be described with reference to the accompanying drawings.

1 is a fire extinguishing pipe, and 2 is a sensing pipe. The fire extinguishing pipe 1 is provided with opening nozzles 3 at appropriate intervals, and the sensing pipe 2 is provided with sensing nozzles 4 also at appropriate intervals. Both the fire extinguishing piping 1 and the sensing piping 2 are arranged in parallel in the circumferential groove of the floating roof tank. Further, a pressure storage tank 5 is installed on the floating roof tank. Piping is provided between this pressure-resistant storage tank 5 and the fire extinguishing piping 1 and sensing piping 2 as follows. That is, a distribution pipe 7 is provided between the fire extinguishing pipe 1 and the bottom opening 6 of the pressure storage tank 5.
A simultaneous release valve 8 and a manual valve 9 are provided in the middle of the distribution pipe 7, with the simultaneous release valve 8 on the side of the fire extinguishing pipe 1 and the manual valve 9 on the side of the bottom opening 6 of the pressure storage tank 5. are provided at appropriate intervals.

Further, a sensing and information transmission piping 11 is provided between the sensing piping 2 and the upper opening 10 of the pressure storage tank 5, and in the middle of this sensing and information transmission piping 11, from the pressure storage tank 5 side, manual valve 12, leak valve 13,
Manual valves 14 are provided at appropriate intervals.
Also, a manual valve 1 installed on the side closer to the sensing pipe 2
4 and leak valve 13 for sensing and information transmission piping 1
A dedicated information transmission pipe 15 is provided between the distribution pipe 1 and the simultaneous release valve 8 provided in the distribution pipe 7.
Note that 16 is a manual valve provided in the middle of the information transmission pipe 15. Reference numeral 17 denotes a nitrogen gas supply conduit, which is connected to the sensing and information transmission piping 11 at a branch point 18, which is connected to the leak valve 13 of the sensing and information transmission piping 11 and the pressure storage tank 5.
It is preferable that the manual valve 12 be provided between the manual valve 12 and the upper opening 10 of the valve. Nitrogen gas whose pressure is regulated to 3 to 10 kg/cm ² is supplied from outside the oil embankment to this nitrogen gas supply conduit 17 and is fed from a branch point 18 into the sensing and information transmission pipe 11 to the upper part of the pressure storage tank 5. It is supplied to the pressure storage tank 5 from the port 10.

In addition, in order to supply nitrogen gas to the pressure-resistant storage tank 5, a part of the sensing and information transmission piping 11 is not used.
Although there is no problem in using a pipe exclusively for supply, the above-mentioned system is preferable from an economical point of view, such as loss of expensive halon gas.

Note that 19 is a safety valve provided in the pressure-resistant storage tank 5, and 20 is a pressure gauge.

A manual valve 9 provided in the above-mentioned distribution pipe 7,
Manual valve 1 installed in sensing and information transmission pipe 11
2 and 14 and the manual valve 16 provided in the information transmission piping 15 are both manually closed only when necessary for inspection or other purposes, and are normally open.

In such a piping system, the pressure storage tank 5 contains about half of Halon 2402, which is a fire extinguishing agent, and is liquid at room temperature, and the upper space of the tank is filled with pressurized nitrogen gas. This means that the distribution pipe 7 from the pressure storage tank 5 to the simultaneous release valve 8 is filled with the fire extinguisher. However, there is no extinguishing agent in the distribution pipe 7 between the simultaneous release valve 8 and the fire extinguishing pipe 1, and the pipe is empty and at atmospheric pressure. Further, pressurized nitrogen gas is filled from the pressure-resistant storage tank 5 to the sensing nozzle 4 of the sensing pipe 2 via the sensing and information transmission pipe 11.

If the sensing nozzle 4 detects a fire in such a state, a sudden ejection of pressurized nitrogen gas from the sensing nozzle 4 that senses the fire will cause
Leak valve 13 in sensing and information transmission piping 11
The pressure between the sensing nozzle 4 of the sensing pipe 2 and inside the information transmission pipe 15 connected to the sensing and information transmission pipe 11 rapidly decreases to atmospheric pressure. When the information transmission pipe 15 is suddenly displaced to atmospheric pressure, the simultaneous release valve 8 of the distribution pipe 7 is activated and the seal inside the valve is ruptured. The extinguishing agent that has been filled under pressure in the distribution pipe 7 up to 8 is ejected from the open nozzle 3 through the fire extinguishing pipe 1 via the simultaneous release valve 8 and extinguishes the fire. Next, the leak valve 13 and the simultaneous release valve 8 for this purpose will be explained.

First, an example of the implementation of the leakage valve will be explained mainly with reference to FIG. 21 is a valve chamber formed in the main body 22, into which a valve body 23 is tightly fitted. A spring 24 is placed on the valve body 23 and presses the valve body 23 at all times. 25 is a handle for adjusting the pressing force of the spring; 26 is a valve body 23;
The O-ring 27 provided on the valve body 23 is a sealing material such as a Teflon sheet, and is provided on the lower surface of the valve body 23 to maintain a more favorable seal with the valve seat 28.
The lower half of the valve chamber 21 serves as a nitrogen gas inflow passage 29 connected to the sensing and information transmission pipe 11' leading to the pressure storage tank 5. A filter 30 is provided on the inflow side (right side in the figure) of the valve body 22 forming the inflow passage 29, and a filter replacement hole 31 is provided for maintenance inspection or replacement of the filter 30. is provided, but is normally closed by a lid 32. The outflow side of the valve body 22 forming the inflow passage 29 , that is, directly below the valve body 23 is a valve seat 28 , which forms a valve port 33 and receives the valve body 23 . A leak hole 34 communicating with the valve chamber 21 is provided in a portion of the pedestal 28 to allow a small amount of gas to pass through at all times. Valve chamber 21
The other lower half is a nitrogen gas outflow passage 35 connected to the sensing and information transmission pipe 11'' leading to the sensing pipe 2, and a part of it is provided with a cleaning port 36 for cleaning and inspection. Note that 37 is a cleaning palate.

Considering the function that this leak valve should perform, it does not necessarily require a filter, filter replacement hole, cleaning port, etc., but it is suitable for long-term use as an automatic fire extinguishing system installed outdoors. From the point of view of forming a structural unit, the presence of these is extremely preferable.

This leak valve 13 is operated as follows. That is, since the valve element 23 is normally pressed against the valve seat 28 to close the valve port 33, the pressurized nitrogen gas in the pressure storage tank 5 is transferred from the pressure storage tank 5 through the sensing and information transmission piping 11. Sensing nozzle 4 of sensing piping 2
This leak valve 13
Even in this case, not only the inflow passage 29 from the sensing and information transmission piping 11' but also the outflow passage 35, which is a part of the valve chamber 21, and the sensing and information transmission piping 11'' are full. Due to the unavoidable leakage of gas from the sensing nozzle 4 of the sensing pipe 2, the gas from the sensing nozzle 4 to the outflow passage 35 decreases, but the gas from the inflow passage 29 side to the leak hole 34 decreases by the amount of decrease. If a fire were to occur and the sensing nozzle 4 detected it, a large amount of pressurized nitrogen gas would suddenly flow out as the sensing nozzle 4 opened. The leakage of pressurized nitrogen gas is detected from the leak hole 34 of the leak valve 13 to the sensing nozzle 4.
The gas that has flowed up to this point instantly flows away, and as a result, the pressure within the sensing and information transmission pipe 11 during this period decreases. As mentioned above, the sensing nozzle 4
The reduced amount due to natural flow from the leakage hole 34 of the leakage valve 13 flows into the leakage hole 34 of the leakage valve 13.
After that, the pressure between the pressure-resistant storage tank 5 side and the sensing nozzle 4 side is maintained in equilibrium, but the leakage hole 34 due to the detection of the sensing nozzle 4 due to a fire.
Since the inflow of pressurized gas from the leakage hole 34 is extremely small, it is difficult to cope with a sudden pressure drop between the leakage hole 34 and the sensing nozzle 4.

The pressure drop in the sensing and information transmission piping 11 between the leak valve 13 and the sensing nozzle 4 also extends to the information transmission piping 15 connected thereto. The sudden pressure drop in the dedicated pipe 15 causes the distribution pipe 7 to
This is a command for starting the simultaneous opening of the simultaneous opening valves 8 in . As is clear from this explanation, in the case of the leakage valve 13, the valve body 23 is connected to the valve seat 2.
8 to constantly seal the valve port 33,
Even when the gas pressure decreases in the event of a fire, there is no change in the sealing, and the reason for lifting the valve body 23 and opening the valve port 33 is to prevent leakage from the valve 13 due to inspection, cleaning, fire, etc. When the pressure up to the sensing nozzle 4 is restored to a newly pressurized state and the fire detection and simultaneous opening valves are activated again, a large amount of pressurized gas is supplied in a short period of time. This is done to increase the flow of water.

As for the size of the leak hole in this leak valve, it has been empirically determined that a diameter of 1 mm or less is sufficient even in equipment for the largest floating roof tank.

In addition, this leak valve must be installed in the route of the sensing and information transmission piping, and in particular, the leakage valve must be installed from the branch point 38 where the information transmission piping 15 branches from the sensing and information transmission piping 11 to the pressure storage tank 5.
must be installed between.

As mentioned above, the leak valve normally allows pressurized gas that decreases due to natural reduction to flow in and out from the leak hole, and maintains the pressure of the pressurized gas in equilibrium between the inflow side and the outflow side with the leak hole as the boundary. , the pressure drop caused by the outflow of pressurized gas from the sensing nozzle due to the occurrence of a fire is not applied to the inflow side of the leak hole, but is stopped only on the outflow side, so of the detailed structure of the leak valve explained above, Regarding the filter exchange hole part including the filter, which is a necessary part for dust removal, and the opening/closing part consisting of the valve seat and valve body etc. that allows a large amount of pressurized gas to flow from the outflow passage to the inflow passage at once, etc. It is possible to separate these and use a commercially available strainer or valve to connect the piping in series or parallel, and combine this with the leakage part where leakage should occur.

Further, in the above explanation, the sensing/information transmitting pipe 11'' is directly connected to the outflow passage 35, but the sensing/information transmitting pipe 11'' is removably connected to the outflow passage 35. Leak hole 3
4 is located close to the pipe 11', there is no need to provide the cleaning port 36.

Furthermore, this leak valve may be used as a three-way valve by incorporating the branch point 38 of the information transmission pipe 15, and the nitrogen gas supply pipe 17 may be connected to this leak valve to configure it as a multi-purpose valve. It is also often convenient for management.

Next, an example of the implementation of the simultaneous release valve used in the present invention will be explained mainly with reference to FIGS. 4 and 5. The simultaneous release valve 8 mainly includes a main body 39, a lid body 40, a valve body 41, a cutter 42, It consists of a sealing plate 43.

One end of the main body 39 is an inlet 44 for extinguishing agent, and a distribution pipe 7' leading to the pressure storage tank 5 is connected to this inlet 44. The interior of the main body 39 adjacent to the inlet 44 forms a valve chamber 45 together with the lid 40 . In addition, the inner wall surface 46 of the main body 39 has a small diameter portion 47 and a large diameter portion 4.
8, and a valve body 41 is provided inside the main body 39 so as to fit tightly into this small diameter portion 47. A protrusion 49 is provided on one side of the valve body 41, and a protrusion 50 is provided on the opposite side of the valve body 41. A spring 5 is provided between the valve body 41 and the lid body 40.
1 is provided to press the valve body 41 toward the bottom surface 52 of the main body 39, and a void chamber 53 is formed between the projection 49 and the bottom surface 52.

Further, a hollow cylindrical cutter 42 is provided at the center of the valve body 41. In addition, 54 is cutter 4
This is a circular hole provided in 2. On the other hand, the lid body 40 is tightened to the main body 39 with bolts 55;
0 is connected to a distribution pipe 7'' extending in a cylindrical shape and leading to the opening nozzle 3, and a filter 57 is provided in the space chamber 56 on the outlet side. is provided with a sealing plate 58. Reference numeral 59 is a gasket, and 60 is a screw holding the sealing plate 58.

The tip of the cutter 42 described above is fitted into the presser screw. The lid body 40 also has an information receiving hole 61, which has the above-mentioned information transmission pipe 1.
5 is connected. Along with this information receiving hole 61, the lid body 40 has a small hole 62.
A side pipe 63 is connected to the side pipe 63, and this side pipe 63 passes through a manual valve 64 to the cavity chamber 5 formed in the main body 39.
3. The simultaneous opening valve 8 is normally operated as follows. That is, the extinguishing agent enters through the inlet 44 of the main body 39 from the distribution pipe 7', fills the cavity 53, and presses the valve body 41. On the other hand, pressurized nitrogen gas from the information transmission pipe 15 enters the valve chamber 45 through the information receiving hole 61 and is filled with the valve chamber 45 . Therefore, the valve body 41 is kept in equilibrium by being pressed toward the bottom surface 52 of the main body 39 due to the pressure of the pressurized nitrogen gas in the valve chamber 45 and the pressing force of the spring 51.

Now, when a fire occurs and the sensing nozzle 4 senses it, pressurized nitrogen gas is ejected from the sensing nozzle 4, and the pressure inside the sensing and information transmission pipe 11 rapidly decreases, and the information transmission only It was explained in detail earlier in the explanation about the leak valve that the pressure in the pipe 15 also decreases at the same time, but the pressure drop in the information transmission pipe 15 is caused by the pressure inside the valve chamber 45 passing through the information receiving hole 61 connected to it. This causes the pressure in the valve chamber 45 to decrease rapidly.
A decrease in the pressure inside the valve chamber 45 means that the pressure of the extinguishing agent pressing against the valve body 41 becomes stronger.
The protrusion 50 rapidly slides toward the lid 40 against the force of the protrusion 50, and the sliding stops when the protrusion 50 collides with the lid 40. This sliding movement of the valve body 41 causes the valve body 41 to move from the small diameter part 47 of the valve chamber 45 to the large diameter part 48.
It will move to and stop at this position. At the same time, the cutter 42 of the valve body 41 also breaks the sealing plate 43 as it slides, and by breaking the sealing plate 43, the valve chamber 45 and the space chamber 56 on the outlet side are brought into communication. This allows the extinguishing agent to flow from the inlet 44 of the body 39 into the cylindrical cavity 56.

That is, the extinguishing agent is delivered to the large diameter portion 4 in the valve chamber 45.
8 and the circular hole 5 of the cutter 42 from between the valve body 41
4 and the interior of the cutter 42 to the cylindrical cavity 56.
As a result, the extinguishing agent in the pressure storage tank 5 reaches the fire extinguishing pipe 1 and is jetted out all at once from the opening nozzle 3, thereby starting a fire extinguishing operation.

The material of the sealing plate 58 used in the simultaneous opening valve 8 is preferably copper or other noble metals in view of its durability and other aspects, and light metals or polymeric materials are not so preferred. Various shapes can be used, including a flat shape as shown in the figure and a dome shape, but it is preferable that they have no pinholes or the like.

The thickness of the copper plate is 1mm if the gas pressure is less than 10Kg/ ^cm2 and the hole diameter is less than approximately 50mm.
The following may be used.

In order to effectively activate the automatic fire extinguishing system configured as described above, first close the manual valve 9 in the distribution pipe 7, put the extinguishing agent into the pressure storage tank 5, and then release it from outside the oil embankment. of nitrogen gas in a pressure-resistant storage tank 5
Put it in. At this time, turn the handle 25 of the leak valve 13 to close the valve port 33, close the manual valve 14 in the sensing and information transmission pipe 11, open the manual valve 12, and open the manual valve 16 in the information transmission pipe 15. Keep it closed. When the nitrogen gas has finished entering, close the manual valve 65 of the gas supply conduit 17, turn the handle 25 of the leak valve 13 to open the valve port 33, and at the same time open the manual valve 14 to supply nitrogen gas to the sensing nozzle. After filling, the handle 25 of the leak valve 13 is turned to close the valve port 33. In this state, the sealing plate 43 is assembled into the lid body 40 of the simultaneous opening valve 8, and the valve body 41 is assembled into the main body 39 along with the cutter 42 and spring 51, and the main body 39 and the lid body 40 are tightened with bolts 55 to open them all at once. Assemble the valves 8 and each inlet 44
The distribution piping 7' is connected to the cylindrical cavity 56, the distribution piping 7'' is connected to the information receiving hole 61, and the information transmission dedicated piping 15 is connected to the information receiving hole 61. Then, the manual valve 16 is opened to connect the information receiving hole. Nitrogen gas is supplied and filled into the valve chamber 45 from the valve chamber 61. At this time, the manual valve 64 is opened to measure the filling of nitrogen gas into the valve chamber 45. When this is finished, the manual valve 64 is closed, and then the manual valve 9 is opened. is opened and the cavity chamber 53 of the simultaneous opening valve 8 is filled with pressurized extinguishing agent to apply back pressure to the valve body 41. At this time, the repulsive force of the spring against the valve body 41 is equal to the extinguishing agent against the valve body 41. 10%~90% of back pressure preferably 50%~80
It is best to set it within the range of %. For example, when the nitrogen gas is set at 7 kg/cm ² , it is easy to obtain good operation if the pressure is balanced to 5 kg/cm ² .

The present invention is constructed as described above, and the pressure storage tank 5 is normally filled with a fire extinguishing agent, such as liquid Halon 2402, at the bottom, and the fire extinguishing agent is distributed from the bottom 6 to the void chamber 53 of the simultaneous release valve 8. Moreover, this extinguishing agent is under pressure from the nitrogen gas located above the pressure storage tank 5, so it is naturally pressurized and presses the valve body 41.
On the other hand, the area from the sealing plate 43 of the simultaneous release valve 8 to the opening nozzle is empty and under normal pressure.

In addition, the nitrogen gas above the extinguishing agent in the pressure-resistant storage tank 5 flows under pressure from the upper opening 10 through the detection and information transmission piping 11 to the detection nozzle 4 of the detection piping 2, and also flows under pressure from the information receiving hole 61 of the simultaneous release valve 8 to the valve chamber 45 through the information transmission dedicated piping 15.

If time passes without a fire occurring in this state, the nitrogen in the sensing and information transmission piping 11 beyond the leak valve 13 will leak due to the natural flow of nitrogen gas from the sensing nozzle 4. As the gas decreases and the pressure decreases, nitrogen gas is replenished from the leak hole 34 of the leak valve 13 to that extent, and the pressure within the sensing and information transmission piping bordered by this leak hole 34 is kept in balance.
In addition, since a balance is maintained with the nitrogen gas in the information transmission pipe 15 connected to this sensing and information transmission pipe, the nitrogen gas pressure is also maintained in the valve chamber 45 of the simultaneous release valve 8. As already explained, when a fire occurs, the sudden drop in pressure in the sensing and information transmission piping to the leak hole caused by the ejection of nitrogen gas from the sensing nozzle causes a sudden drop in the pressure in the information transmission piping 15 connected to it. This causes a sudden drop in the pressure in the valve chamber 45 in the simultaneous opening valve 8, causing the cutter 42 to destroy the sealing plate 43, and extinguishing agent to be released all at once from the opening nozzle to begin extinguishing the fire. It is something.

Since the present invention is constructed as explained above, there is no need for multiple storage tanks such as a storage tank for fire extinguishing agent and a storage tank for pressurized gas as in the past, and the system can be stored in a single pressure storage tank. Since the extinguishing agent is stored below and the pressurizing gas is stored above it, the number of storage tanks can be reduced, and pressure can be applied to the extinguishing agent at all times, making it easy to detect fire outbreaks. At the same time, the extinguishing agent under pressure can be instantly jetted out from the open nozzle at the same time as the simultaneous release valve is opened, making it possible to effectively carry out initial fire extinguishment. This simplifies the piping, making it easier to perform maintenance and inspections on floating roofs, which are difficult to work on, and also makes it possible to fill the distribution piping between the pressure storage tank and the simultaneous opening of the valves with extinguishing agent under pressure. As a result, the simultaneous release valve can be placed close to the opening nozzle from which extinguishing agent is spewed out, and the time difference between fire detection and extinguishing agent spouting is almost zero, and is now close to zero. Summer. In this way, floating roofs do not rely on electrical signals, which are considered dangerous, but provide stable sensing and transmission performance over many years with instantaneousness and reliability comparable to electrical signals.
It also eliminates the leakage loss of expensive halon-based extinguishing agents,
This is an epoch-making device that has completely eliminated malfunctions caused by leaks in the sensing system, and can be said to have put automatic fire extinguishing by simultaneously opening the system into practical use in floating roof tanks.

[Brief explanation of the drawing]

The attached drawings are for explaining the present invention.
The figure is a piping diagram for implementing conventional automatic fire extinguishing, Figure 2 is a piping diagram showing an example of implementation of the automatic fire extinguishing system in the present invention, and Figure 3 is a follow-up section showing an example of the leakage valve used in the present invention. Figures 4 and 5 show an example of the simultaneous opening valve used in the present invention, and Figure 4 shows the normal state (before the sealing plate).
FIG. 5 is a longitudinal side view of the fire detection (when the sealing plate is broken). 1... Fire extinguishing piping, 2... Sensing piping, 3...
Opening nozzle, 4... Sensing nozzle, 5... Pressure-resistant storage tank, 6... Bottom port, 7... Distribution piping, 8... Simultaneous release valve, 10... Upper port, 11... Sensing and information transmission Piping, 12...Leak valve, 15...Piping for information transmission, 34...Leak hole, 41...Valve body, 42
... cutter, 43 ... sealing plate, 45 ... valve chamber.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A fire extinguishing pipe having an opening nozzle and a sensing pipe having a sensing nozzle are arranged almost parallel to each other on the periphery of the floating roof, and teeth,
A pressure-resistant storage tank containing a fire extinguishing agent below and a pressurized gas above it is provided, and the bottom opening of this pressure-resistant storage tank and the fire extinguishing pipe are connected by a distribution pipe, so that the fire extinguishing agent is pressurized with the pressure gas. Through extinguishing agent,
In addition, this distribution piping is equipped with a simultaneous release valve at an appropriate position, which has an information receiving hole, a valve body with a cutter on the inlet side, and a valve chamber sealed with a sealing plate on the outlet side. The upper opening of the pressure storage tank and the sensing piping are connected by a sensing and information transmission piping to be filled with the pressure gas, and a small amount of the pressure gas is placed in an appropriate position of the sensing and information transmission piping. A leakage valve having a leakage hole that allows continuous access at all times is provided, and further information is provided between an appropriate position in the sensing and information transmission piping between the leakage valve and the sensing piping and the information receiving hole of the simultaneous release valve. By connecting with dedicated transmission piping, the pressure drop in the sensing and information transmission piping due to the ejection of pressure gas accompanying fire detection from the sensing nozzle is stopped at the leak hole of the leak valve, preventing pressure drop to the pressure-resistant storage tank. At the same time, this pressure drop passes through the information transmission piping that branches from the sensing and information transmission piping, passes through the information receiving hole, and reaches the valve chamber, causing the valve body to slide and its cutter to destroy the sealing plate. An automatic fire extinguishing system for simultaneous opening of a floating roof tank, which is characterized by opening a pressurized extinguishing agent passage that has been blocked, and spouting extinguishing agent all at once from an open nozzle. (2) A request for registration of a utility model characterized in that the leak valve has a valve port that is normally closed, and that the valve port has an overcoat on the inlet side and a leak hole cleaning port on the outlet side. Automatic fire extinguishing system for simultaneous opening of floating roof tanks as described in item 1. (3) A simultaneous release valve consists of a space chamber on the outlet side, a valve chamber, and a gap chamber that is a part of the inlet side of the valve chamber. The simultaneous opening automatic extinguishing of a floating roof tank according to claim 1 of the registered utility model claim, characterized in that the interior is filled with pressurized gas entering through the information processing hole and applying gas pressure to the front of the valve body. Device. (4) The simultaneous release valve is characterized in that the valve body thereof is slidable within the valve chamber and has a cutter on the front surface of the valve body, as described in claims 1 and 3 of the utility model registration claim. Automatic fire extinguishing system for simultaneous opening of floating roof tanks. (5) In the simultaneous release valve, the outlet side of the valve chamber has a diameter larger than the diameter of the valve body, and the cutter provided on the valve body is provided with a through hole that leads from the body to the tip. Therefore, when the sealing plate is broken, the extinguishing agent in the cavity chamber is forced to be fed from the large diameter part of the valve chamber, through the through hole, through the space chamber on the outlet side, and into the opening nozzle. An automatic fire extinguishing system for simultaneous opening of floating roof tanks as set forth in claims 1 and 3 of the utility model registration claims. (6) Utility model registration claims 1 and 3 to 5, characterized in that the simultaneous release valve has a side pipe that communicates the large diameter part on the outlet side of the valve chamber with the cavity chamber. Automatic fire extinguishing system for simultaneous opening of the floating roof tank mentioned above.