JP6546444B2 - Gas system fire extinguishing equipment and pressure regulator - Google Patents

Description

  The present invention relates to a gas fire extinguishing system that releases gas as a fire extinguishing agent, and a pressure regulator that regulates the pressure of gas in the gas fire extinguisher.

  Among the gas fire extinguishing facilities, particularly those using nitrogen gas or a part of mixed gas, etc., since the storage form is a gas, the volume of the container for storage is compared with liquefied gas such as carbon dioxide. Increase the number of storage containers correspondingly. As a countermeasure against this, the number of installation has been reduced using an extra-high pressure container. For example, in the case of nitrogen gas, while the normal storage pressure is 15 MPa, the number of storage containers can be halved by setting the storage pressure to 30 MPa.

  However, in this case, since it is necessary to raise the pressure resistance grade of the secondary side equipment of the fire extinguishing equipment, the equipment cost becomes high and it can not be applied to the existing equipment. Therefore, in a gas fire extinguishing system using a conventional ultra-high pressure container, a pressure control valve (pressure control valve) is incorporated in the container valve to integrate both in order to maintain the pressure resistance grade of the secondary device (for example, Patent Document 1).

Patent No. 2813318

  However, since the pressure control valve incorporated in the container valve needs to flow high pressure and high flow rate gas, the component parts have a complicated structure or the apparatus becomes large. Therefore, in the former case, the risk of failure is high, and in the latter case, the production cost is high. Further, in the case of a product having a structure in which the container valve and the pressure control valve are integrated, maintenance of the pressure control valve is not easy.

  The present invention has been considered in view of such problems, and in the gas fire extinguishing equipment, without raising the pressure resistance grade of the secondary side equipment, without complicating the structure of components for adjusting the pressure, the apparatus. The purpose is to facilitate maintenance without increasing the size, increasing the risk of failure, and increasing the production cost.

  The present invention for solving the above-mentioned problems is a pressure regulator connected to the container valve of the extinguishing gas storage container via the primary side piping, which is a gas inlet connected to the primary side piping, and extinguishing gas The sizes of the open portions of the gas outlet communicating with the secondary side pipe connected to the ejection head to be discharged, the gas circulating portion communicating the gas inlet and the gas outlet, and the gas inlet and the gas circulating portion The adjusting unit includes a cylinder and a piston housed in the cylinder, and the cylinder is formed at one end of the cylinder and is a first pressure member pressurized by the gas in the constant pressure gas container. The pressure port and the second pressure port formed at the other end of the cylinder and pressurized by the gas in the secondary side pipe, the piston is accommodated in the cylinder, and pressure is applied from the first pressure port Attached in one direction by the Supported from below by the first piston, and the spring housed in the cylinder and at the lower end of the cylinder, and the gas and the spring pressurized from the second pressure port are applied in the opposite direction to one direction. A second piston to be energized, a piston rod connecting the first piston and the second piston, and a piston rod integrally formed with the first piston and the second piston; The position of the piston in the cylinder is moved up and down according to the relationship between the pressure in the secondary side piping and the repulsive force of the spring to adjust the size of the open portion of the gas inlet and Control the pressure in the next piping.

The first piston has a first pressure receiving surface for receiving the pressure of gas pressurized from the first pressure port, and the piston extends to the first piston and the opposite side of the first pressure receiving surface of the first piston. A piston rod provided and having a diameter smaller than that of the first piston, and a second piston extending from the piston rod to the opposite side of the first pressure receiving surface and having a diameter larger than that of the piston rod are integrally elevatingly movable. Has a first exposed surface exposed toward the piston rod at the interface with the piston rod, and a second piston has a second exposed surface exposed toward the piston rod at the interface with the piston rod The second piston has a second pressure receiving surface supported by the spring and receiving the pressure of the gas pressurized from the second pressure port, and according to the value of the pressure in the target secondary side pipe , The first pressure receiving surface is the first The sum of the value of the force received by the pressure of the constant pressure gas introduced from the pressure port and the value of the force received by the second exposed surface by the pressure in the secondary piping is the pressure of the first exposed surface in the secondary piping Of the pressure of the constant pressure gas to be equal to the sum of the value of the force received by the second pressure receiving surface and the value of the force received by the pressure in the secondary side pipe introduced from the second pressure port and the repulsive force of the spring . It is preferable to define the value, the area of the first pressure receiving surface, the area of the second exposed surface, the area of the first exposed surface, the area of the second pressure receiving surface, and the repulsive force of the spring . Moreover, it is preferable that a seal part is arrange | positioned by the inner peripheral surface which slides a piston in a cylinder, and a primary side piping and a secondary side piping are interrupted | blocked by closing a seal part by a piston.

  Further, the present invention is a gas system fire extinguishing facility for releasing gas into a fire extinguishing target compartment and extinguishing the fire, the fire extinguishing gas storage container storing the gas, and the container valve controlling emission of the gas from the fire extinguishing gas storage container. , The primary side piping connected to the container valve, the pressure regulator connected to the primary side piping, the secondary side piping connected to the pressure regulator, and the secondary side piping to inject a gas And a jet head.

  The pressure regulator according to the present invention operates the piston according to the pressure in the secondary side piping to perform feedback control to adjust the size of the open portion between the gas inlet and the gas circulation unit, thereby performing secondary control. The pressure in the side piping can be controlled to a predetermined value. In addition, since the pressure regulator is separated from the container valve, the structure of parts is not complicated, the apparatus does not become large, the risk of failure can not be increased, the production cost can be reduced, and maintenance is easy. Become.

  In addition, control is performed based on the relationship between the force received by the first pressure receiving surface, the second exposed surface, the first exposed surface, and the second pressure receiving surface by the pressure of the constant pressure gas and the pressure in the secondary side piping. Since the pressure in the secondary pipe can be kept constant, the pressure in the secondary pipe does not fluctuate, and the discharge pressure of the extinguishing gas can be made constant.

  Furthermore, the pressure regulator can be provided with the function of a valve by providing the seal portion and making it possible to shut off the primary side piping and the secondary side piping.

  In the gas fire extinguishing system provided with the pressure regulator, the pressure regulator can stably control the pressure in the secondary side piping to a predetermined value, and there is no need to raise the pressure resistance grade of the secondary side device The gas can be stably jetted from the jet head.

It is a block diagram which shows the example of gas system fire extinguishing installation. It is a block diagram which shows a fire extinguishing gas storage container, a pressure regulator, and its periphery. It is a sectional view showing an example of a pressure regulator. It is a sectional view showing another example of a pressure regulator.

The gas-based fire extinguishing installation 1 shown in FIG. 1 is an installation for releasing a gas as a extinguishing agent in a plurality of fire extinguishing target sections 30a, 30b to extinguish the fire. The gas fire extinguishing system 1 includes a plurality of fire extinguishing gas storage containers 20a, 20b, 20c, 20d and 20e. In each of the fire extinguishing gas storage containers 20a, 20b, 20c, 20d and 20e, a fire extinguishing gas such as nitrogen gas (N ₂ gas) is sealed at a storage pressure of 30 [MPa].

  Attached to the extinguishing gas storage containers 20a, 20b, 20c, 20d, and 20e are container valves 21a, 21b, 21c, 21d, and 21e that control the emission of gas from the individual extinguishing gas storage containers. As shown in FIG. 2, the container valve 21a, 21b, 21c, 21d, 21e has an outlet 211 for discharging the gas stored in the extinguishing gas storage container 20a, 20b, 20c, 20d, 20e, and the container valve 21a. , 21b, 21c, 21d, and 21e, and an open / close gas inlet 212 for introducing a gas for controlling the opening and closing of the discharge port 211, and the outlet 211 is connected through connection pipes 22a, 22b, 22c, 22d, and 22e. One end of the collecting pipe 23 is connected. Further, the opening and closing gas inlets 212 are connected to the opening and closing gas pipelines 24a, 24b, 24c, 24d and 24e, respectively.

  The opening and closing gas pipelines 24a, 24b, 24c, 24d and 24e are connected to the constant pressure gas container 27 via the solenoid valve 25 and the three-way solenoid valve 26, and the gas in the constant pressure gas container 27 is opened and closed. The gas passes through the passages 24a, 24b, 24c, 24d, 24e to the open / close gas inlet 212 provided in the container valves 21a, 21b, 21c, 21d, 21e to open or close the container valves 21a, 21b, 21c, 21d, 21e. . That is, the constant pressure gas container 27 functions as an operation container for opening and closing the container valves 21a, 21b, 21c, 21d and 21e.

  The other end of the collecting pipe 23 is connected to the pressure regulator 50. Further, the secondary side piping 28 is connected to the pressure regulator 50. The pressure regulator 50 is a pressure regulator that uses the collecting pipe 23 as a primary side pipe, and adjusts the pressure in the secondary side pipe 28 by feedback control according to the pressure in the secondary side pipe 28. The secondary side piping 28 is provided with a piping safety valve 35, and when the pressure in the secondary side piping 28 becomes too high, the piping safety valve 35 is opened.

  As shown in FIG. 1, the ejection heads 31a and 31b provided in the fire suppression target sections 30a and 30b are connected to the secondary side piping 28 via a plurality of selection valves 29a and 29b. The selection valves 29a and 29b are connected to the activation gas containers 32a and 32b, respectively, and the activation valves from the activation gas containers 32a and 32b open the selection valves 29a and 29b, respectively. The activation gas containers 32a and 32b operate in accordance with instructions from the openers 33a and 33b. A pressure switch 34 and a piping safety valve 35 are connected to the secondary side piping 28. When the gas pressure in the secondary side piping 28 becomes too high, the pressure switch 34 operates to close the solenoid valve 25 and exhaust the three-way solenoid valve 26. The solenoid valve 25, the three-way solenoid valve 26, the opener 33 a, the opener 33 b, and the pressure switch 34 are electrically connected to the control panel 41 and can be operated by a signal from the control panel 41.

  The selection valve 29 a is connected to the constant pressure gas container 27 via the non-return valve 38. Further, the selection valve 29 b is connected to the constant pressure gas container 27 via the non-return valve 37. When the opener 33a operates, the gas in the activation gas container 32a is supplied to the constant pressure gas container 27, and the gas in the constant pressure gas container 27 is released. In addition, when the opener 33b operates, the gas in the activation gas container 32b is supplied to the activation container 27a.

As shown in FIG. 2, the pressure regulator 50 includes a first pressure port 51 and a second pressure port 52. The first pressurizing port 51 is formed in the upper part in the illustrated example, and is connected to the opening and closing gas pipelines 24a, 24b, 24c, 24d, and 24e through a pipe 39. Starting containers 32a and 32b are connected to the constant pressure gas container 27, for example, CO ₂ gas is enclosed in the starting containers 32a and 32b, and CO ₂ gas is released from the starting containers 32a and 32b. The valve provided in the constant pressure gas container 27 can be opened to release nitrogen gas. The pressure in the constant pressure gas container 27 is kept constant (for example, 15 [MPa]), and when nitrogen gas is released from the constant pressure gas container 27, a constant pressure is always applied to the first pressurizing port 51.

  The second pressurizing port 52 is formed in the lower part of the pressure regulator 50 in the illustrated example. The gas in the secondary side pipe 28 is injected into the second pressurizing port 52 via the pipe 40 connected to the secondary side pipe 28.

  As shown in FIG. 3, a gas inlet 53 communicating with the collecting pipe 23 and a gas outlet 54 communicating with the secondary pipe 28 are formed on the side of the pressure regulator 50. As shown in FIG. 3, the pressure regulator 50 is internally provided with a cylinder 55 along the longitudinal direction (vertical direction), and the cylinder 55 has a gas inlet 53 and a gas outlet 54 at its side. It is in communication. Further, the upper end of the cylinder 55 is provided with a first pressure port 51, and the lower end thereof is provided with a second pressure port 52. A piston 56 is accommodated in the cylinder 55. The cylinder 55 includes an upper cavity 550 and a lower cavity 551 having different inner diameters, and the upper cavity 550 is formed to have a larger inner diameter than the lower cavity 551.

  The piston 56 includes a first piston 57 accommodated in the upper cavity 550, a second piston 58 accommodated in the lower cavity 551, and a piston rod 59 connecting the first piston 57 and the second piston 58. Are integrally formed.

  The first piston 57 has a first pressure receiving surface 572 which receives the pressure of the gas pressurized from the first pressurizing port 51. The first pressure receiving surface 572 is formed in a planar shape in a direction orthogonal to the elevating direction (vertical direction) of the piston 56.

  The piston rod 59 is extended on the opposite side of the first pressure receiving surface 572 of the first piston 57 and has a smaller diameter than the first piston 57. The first piston 57 is provided with a first exposed surface 573 exposed toward the piston rod 59 at the boundary with the piston rod 59. The first exposed surface 573 is formed in a planar shape in a direction perpendicular to the elevating direction (vertical direction) of the piston 56.

  The second piston 58 is extended from the piston rod 59 to the opposite side of the first pressure receiving surface 572 and has a diameter larger than that of the piston rod 59. The second piston 58 is provided with a second exposed surface 582 exposed toward the piston rod 59 at the boundary with the piston rod 59. The second exposed surface 582 is formed flat in a direction perpendicular to the elevating direction (vertical direction) of the piston 56.

  The gas inlet 53 and the gas outlet 54 are disposed at different heights, and the second piston 58 faces the gas inlet 53 when the second piston 58 is at the uppermost position. 58 is located.

  The middle portion 570 of the first piston 57 is formed to have an outer diameter smaller than that of the upper and lower sides, and an O-ring 571 is wound around it, and the O-ring 571 is an outer periphery of the middle portion 570 and the upper hollow portion 550. It is in contact with the inner periphery, and prevents the gas introduced from the first pressure port 51 from leaking downward from the O-ring 571.

  A spring 61 is inserted below the lower cavity 551, and a second piston 58 is inserted above the spring 61. The lower end of the spring 61 is in contact with the bottom surface of the cylinder 55, the upper end of the spring 61 is in contact with the lower surface of the second piston 58, and the lower surface of the second piston 58 is supported by the spring 61 and The second pressure receiving surface 583 receives the pressure of the gas to be pressurized. The second pressure receiving surface 583 is formed in a planar shape in a direction orthogonal to the elevating direction (vertical direction) of the piston 56.

  The middle portion 580 of the second piston 58 is smaller in outer diameter than the upper and lower portions, and an O-ring 581 is wound therearound, and the O-ring 581 is formed on the outer periphery of the middle portion 580 and the lower cavity 551. , And prevents the gas introduced from the second pressure port 52 from leaking above the O-ring 581.

  There is a gap between the outer periphery of the piston rod 59 and the inner periphery of the cylinder 55, and this gap causes the gas inlet 53 and the gas outlet 54 to communicate with each other, and the gas from the collecting pipe 23 which is the primary side piping. To the secondary side pipe 28. The size of the opening of the gas flow portion 64 is adjusted by the vertical position of the piston 56 in the cylinder 55. That is, the cylinder 55 and the piston 56 function as the adjustment unit 63 that adjusts the size of the open portion of the gas inlet 53 and the gas circulation unit 64.

  The second pressure receiving surface 583 of the second piston 58 is biased upward by the pressure in the secondary pipe 28 and the spring 61. Therefore, the pressure of the gas in the constant pressure gas container 27 introduced from the first pressurizing port 51, the pressure of the gas in the secondary side pipe 28 introduced from the second pressurizing port 52, and the repulsive force of the spring The position of the piston 56 in the vertical direction is determined according to the relationship with. That is, when the pressure of the gas introduced from the first pressurizing port 51 is larger than the pressure of the gas introduced from the second pressurizing port 52 and the repulsive force of the spring 61, the piston 56 is moved downward. As a result, the opening of the gas inlet 53 is enlarged, and the cross-sectional area of the opening of the gas circulation portion 64 is increased. On the other hand, if the pressure of the gas introduced from the first pressurizing port 51 is smaller than the pressure of the gas introduced from the second pressurizing port 52 and the repulsive force of the spring, the opening of the gas inlet 53 The portion becomes smaller, the piston 56 is pushed upward, and the cross-sectional area of the gas flow portion 64 becomes smaller.

  Below, the pressure of the gas introduced from the first pressurization port 51 is set to 15 [MPa] by setting the pressure of the gas in the constant pressure gas container 27 shown in FIGS. 1 and 2 to 15 [MPa]. On the other hand, the filling pressure of the gas in the extinguishing gas storage containers 20a, 20b, 20c, 20d and 20e is made as high as 30 [MPa] for the purpose of reducing the number of cylinders. In order to lower the pressure grade, it is assumed that the pressure in the secondary side pipe 28 is to be controlled to 6 [MPa]. Further, in a normal state (initial state) in which the fire extinguishing facility is not activated, the piston 56 is pushed up to the upper end of the cylinder 55 by the repulsive force of the spring 61.

  Next, the operation of the gas fire extinguishing system 1 shown in FIG. 1 will be described by taking the case where a fire occurs in the fire suppression target section 30a as an example.

  When a fire occurs in the fire extinguishing target section 30a, the activation signal from the push button is input to the control panel 41, or the sensor detects heat or smoke, whereby the opener 33a is used as a gas for activation. The container 32a is operated. Then, the gas released from the activation gas container 32a opens the selection valve 29a, and it becomes possible to release the extinguishing gas flowing through the secondary side pipe 28 from the injection head 31a.

  The gas released from the starting gas container 32 a opens the valve of the constant pressure gas container 27, and the nitrogen gas in the constant pressure gas container 27 is released.

  The nitrogen gas released from the constant pressure gas container 27 opens the container valves 21a, 21b, 21c, 21d and 21e attached to the extinguishing gas storage containers 20a, 20b, 20c, 20d and 20e. Then, nitrogen gas is released from the extinguishing gas storage containers 20a, 20b, 20c, 20d and 20e.

  The nitrogen gas released from the fire extinguishing gas storage containers 20a, 20b, 20c, 20d and 20e flows from the gas inlet port 53 of the pressure regulator 50 shown in FIG. Then, the nitrogen gas flows out from the gas outlet 54 and is jetted from the jet head 31 a that has reached via the secondary pipe 28.

  When the extinguishing gas starts to flow out of the extinguishing gas storage containers 20a to 20e, first, the pressure in the collecting pipe 23 becomes an ultrahigh pressure state close to approximately 30 [MPa]. In the initial state, the piston 56 in the pressure regulator 50 is raised to the upper limit position, so that the second piston 58 almost blocks the path from the gas inlet 53 to the gas circulation portion 64. Large pressure loss is generated. In this initial state, when the pressure in the collecting pipe 23 is 30 [MPa], the pressure in the secondary side pipe 28 is designed to be 6 [MPa]. Furthermore, the sum of the value of the force that the first pressure receiving surface 572 receives from the pressure of the constant pressure gas introduced from the first pressurizing port 51 and the value of the force that the second exposed surface 582 receives from the pressure in the secondary pipe 28 However, the value of the force that the first exposed surface 573 receives by the pressure in the secondary pipe 28 and the value of the force received by the second pressure receiving surface 583 by the pressure in the secondary pipe 28 introduced from the second pressure port 52 The value of the pressure of the constant pressure gas, the area of the first pressure receiving surface 572, the area of the second exposed surface 582, the area of the first exposed surface 573, and the second pressure receiving surface 583 so as to be equal to the sum of the values. Define the area of the

  When nitrogen gas is injected from the injection head 31a, the gas in the extinguishing gas storage containers 20a to 20e gradually decreases, so the pressure in the collecting pipe 23 decreases. Here, if the piston 56 in the pressure regulator 50 continues to be at the upper limit position in the initial state, a large pressure loss continues to occur between the gas inlet 53 and the gas circulation portion 64, so the pressure in the collecting pipe 23 The pressure in the secondary side pipe 28 also decreases as the

  However, if the pressure in the secondary side pipe 28 which pushes the piston 56 upward is less than 6 [MPa], the force of the constant pressure gas which flows in from the first pressure port 51 and pushes the piston 56 wins At the beginning, the piston 56 is pushed downward. Then, the piston 56 descends and the second piston 58 also descends, so the path between the gas inlet 53 and the gas circulation portion 64 becomes large, the pressure loss decreases, and the pressure in the secondary pipe 28 decreases. When the pressure reaches 6 [MPa], the position of the piston 56 is determined. By keeping such balance, the pressure in the secondary side pipe 28 is a constant value (here, 6 MPa, even if the pressure in the collecting pipe 23 continues to decrease gradually as time passes from immediately after radiation. ] Is kept.

  Furthermore, when the radiation in the gas continues and most of the gas in the extinguishing gas storage containers 20a to 20e flows out, the pressure in the collecting pipe 23, which was originally 30 [MPa], drops to nearly 6 [MPa] Comes. Then, the piston 56 descends, and the pressure loss between the gas inlet 53 and the gas circulation portion 64 is almost eliminated, and the pressure in the collecting pipe 23 and the pressure in the secondary side pipe 28 are about 6 [MPa]. It becomes almost the same state. Then, when the pressure in the collecting pipe 23 eventually falls below 6 [MPa], the pressure in the secondary side pipe 28 also falls below 6 [MPa] accordingly. After this, the piston 56 in the pressure regulator 50 is pressed downward only by constant pressure gas pressure, and there is almost no pressure loss between the gas inlet 53 and the gas circulation portion 64, and the collecting pipe is followed The pressure in the secondary side pipe 28 also decreases following the decrease in pressure in the line 23.

  When the pressure in the pipe becomes too high (for example, when the pressure value becomes 11 [MPa] or more), the pressure switch 34 operates and the solenoid valve 25 is operated. By evacuating the three-way solenoid valve 26, the gas is not sent from the constant pressure gas container 27 to the container valves 21a to 21e and the container valves 21a to 21e are closed. Thus, the extinguishing gas is discharged from the extinguishing gas storage containers 20a to 20e. It will not be released. Moreover, when the pressure in the secondary side piping 28 rises in the meantime, the pressure in the secondary side piping 28 is prevented from rising by opening the piping safety valve 35. At the time of restart, after solving the problem of blockage of the secondary side piping 28, the pressure switch 34 is automatically reset and discharge of the extinguishing gas from the extinguishing gas storage containers 20a to 20e is started.

  As described above, in the pressure regulator 50, the piston 56 operates according to the pressure of the gas in the secondary side pipe 28 to adjust the size of the opening of the gas circulation unit 64, and thus the pressure regulator 50 is configured. It is possible to reduce the production cost without increasing the complexity of the structure of the parts to be manufactured, increasing the size of the pressure regulator 50, and increasing the risk of failure. Further, since the pressure regulator 50 is separated from the container valves 21a to 21e, maintenance is facilitated, and one pressure regulator 50 can be connected to the plurality of container valves 21a to 21e, The configuration of the gas fire extinguishing system 1 is simplified, and the cost can be reduced as a whole.

  Pressure adjustment is performed by changing the position of the piston 56 provided in the pressure regulator 50 according to the relationship between the constant pressure of the gas in the constant pressure gas container 27 and the pressure of the gas in the secondary side pipe 28. The structure of the vessel 50 can be simplified to reduce the risk of failure and the cost of production. Further, by using not only the pressure of the gas in the secondary side pipe 28 but also the repulsive force of the spring 61, it is possible to more flexibly set the condition when the piston 56 moves up and down.

  The pressure regulator 70 shown in FIG. 4 is configured by further including a seal portion 71 and a spring 73 in the pressure regulator 50 shown in FIG. 3.

  The seal portion 71 is provided on the inside of the cylinder 55, in the example of FIG. 4, on the inner peripheral surface of the lower cavity 551. The lower cavity 551 is a surface on which the second piston 58 slides, and the seal portion 71 is provided with an O-ring 72 for sliding the second piston 58. On the other hand, the spring 73 is interposed between the first pressure receiving surface 572 and the ceiling surface of the cylinder 55, and biases the piston 56 downward.

  As shown in FIG. 4, in the state where the piston 56 is lowered below the upper limit position, the seal portion 71 is located above the second piston 58, and the gas inlet 53 and the gas outlet 54 are the gas flow portion 64. It is open through. On the other hand, when the pressure in the secondary side pipe 28 rises and the piston 56 rises, the second piston 58 slides on the inside of the O-ring 72 and rises, and the O-ring 72 moves to the inner periphery of the lower cavity 551 Since the gas inlet 53 and the gas outlet 54 are divided by coming into contact with the outer periphery of the second piston 58, the collecting pipe 23 and the secondary pipe 28 are shut off. As described above, since the collecting pipe 23 and the secondary side pipe 28 are shut off by the change in the position of the piston 56 in the vertical direction, the pressure regulator 70 functions as a valve.

1: Gas fire extinguishing equipment 20a, 20b, 20c, 20d, 20e: fire extinguishing gas storage containers 21a, 21b, 21c, 21d, 21e: container valve 211: outlet 212: open / close gas inlet 22a, 22b, 22c, 22d, 22e: Connecting pipe 23: Collecting pipe (primary side piping)
24a, 24b, 24c, 24d, 24e: opening and closing gas pipe 25: solenoid valve 26: three-way solenoid valve 27: constant pressure gas container 28: secondary side piping 29a, 29b: selection valve 30a, 30b: fire suppression target section 31a, 31b: injection head 32a, 32b: start-up gas container 33a, 33b: opening device 34: pressure switch 35: piping safety valve 37, 38: non-return valve 39, 40: piping 41: control panel 50: pressure regulator 51: First pressure port 52: second pressure port 53: gas inlet 54: gas outlet 55: cylinder 550: upper cavity 551: lower cavity 56: piston 57: first piston 570: middle 571: O ring 572: first pressure receiving surface 573: first exposed surface 58: second piston 580: middle portion 581: O ring 582: second exposed surface 583: second pressure receiving surface 59: piston Head 61: spring 63: adjuster 64: gas distribution part 70: pressure regulator 71: seal portion 72: O-ring 73: spring

Claims (4)

A pressure regulator connected to a container valve of a extinguishing gas storage container via primary piping, comprising:
A gas flow connecting the gas inlet connected to the primary side pipe, the gas outlet connected to the secondary side pipe connected to the injection head for releasing the extinguishing gas, and the gas inlet and the gas outlet And an adjusting unit for adjusting the size of the open portion between the gas inlet and the gas circulating unit,
The adjustment unit is
It consists of a cylinder and a piston housed in the cylinder,
The cylinder is
A first pressure port formed at one end of the cylinder and pressurized by the gas in the constant pressure gas container;
A second pressure port formed at the other end of the cylinder and pressurized by the gas in the secondary pipe;
Equipped with
The piston is
A first piston housed in the cylinder and biased in one direction by gas pressurized from the first pressure port;
It is supported from below by a spring housed in the cylinder and at the lower end of the cylinder, and biased in the direction opposite to the one direction by the gas pressurized from the second pressure port and the spring The second piston,
A piston rod connecting the first piston and the second piston and integrally formed with the first piston and the second piston;
Equipped with
The gas inlet is moved up and down by the position of the piston in the cylinder according to the relationship between the constant pressure of the gas in the constant pressure gas container, the pressure in the secondary side piping, and the repulsive force of the spring. The pressure regulator which controls the pressure in the said secondary side piping by adjusting the magnitude | size of the opening part of and the said gas distribution part. The first piston has a first pressure receiving surface that receives the pressure of gas pressurized from the first pressure port,
The piston includes the first piston, a piston rod extending to the opposite side of the first pressure receiving surface of the first piston and having a diameter smaller than that of the first piston, and the opposite side of the first pressure receiving surface from the piston rod A second piston having a diameter larger than that of the piston rod and configured to be able to move up and down integrally with
The first piston has a first exposed surface exposed toward the piston rod at a boundary with the piston rod,
The second piston has a second exposed surface exposed toward the piston rod at a boundary with the piston rod,
The second piston has a second pressure receiving surface which is supported by the spring and receives the pressure of gas pressurized from the second pressure port.
Depending on the value of pressure in the target secondary side piping,
The sum of the value of the force that the first pressure receiving surface receives by the pressure of the constant pressure gas introduced from the first pressure port and the value of the force that the second exposed surface receives by the pressure in the secondary pipe The value of the force that the first exposed surface receives by the pressure in the secondary piping, and the value of the force that the second pressure receiving surface receives by the pressure in the secondary piping introduced from the second pressure port To be equal to the sum of the repulsion of the spring and the
The value of the pressure of the constant pressure gas, the area of the first pressure receiving surface, the area of the second exposed surface, the area of the first exposed surface, the area of the second pressure receiving surface, and the repulsive force of the spring the pressure regulator of claim 1, wherein the defining the and. In the cylinder, a seal portion is disposed on an inner circumferential surface on which the piston slides.
The pressure regulator according to claim 2, wherein the primary side piping and the secondary side piping are shut off by closing the seal portion by the piston. A gas-based fire extinguishing facility that releases gas into the extinguishing area and extinguishes it,
A fire fighting gas storage container storing fire fighting gas;
A container valve for controlling the emission of the extinguishing gas from the extinguishing gas storage container;
Primary side piping connected to the container valve;
The pressure regulator according to any one of claims 1 to 3, which is connected to the primary side piping;
Secondary side piping connected to the pressure regulator;
An injection head connected to the secondary side pipe for injecting a extinguishing gas;
Gas-based fire extinguishing equipment composed of

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