JP2003310783A - Valve device for fire-extinguishing agent storage container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the storage amount of a fire-extinguishing agent by increasing a filling pressure, and in addition, to miniaturize the overall device, and to perform the miniaturization at a low cost. <P>SOLUTION: In a housing (2), an inlet path (5), a closing valve chest (6) and an outlet path (7) are formed in order, and a closing member (15) is slidably inserted in the closing valve chest (6). On the outlet path (7) side of the closing valve chest (6), a closing valve seat (16) is formed, and the closing member (15) is urged to the closing valve seat (16) by an urging means (17). An actuating chamber (18) is formed on the opposite side from the closing valve seat (16) across the closing member (15). The actuating chamber (18) is equipped with an exhaust path (20) which is sealed by a sealing plate (21). An endless ring- shaped sealing member (26) is fitted on the outer peripheral surface of the closing member (15), and a sliding surface is formed on the inner peripheral surface of the closing valve chest (6). On the sealing member (26), a communicating path which communicates the closing valve chest (6) with the actuating chamber (18) is formed. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a valve device for rapidly discharging a fire extinguishing agent stored in a fire extinguishing agent storage container into a fire extinguishing target compartment. The present invention relates to a valve device for a fire extinguisher storage container, which can be reduced in size while increasing the filling pressure to increase the amount of fire extinguishing agent stored, and furthermore, can reduce the size of the entire device. [0002] Conventionally, a valve device attached to a container storing a fire extinguishing agent such as nitrogen gas and rapidly discharging the fire extinguishing agent from the storage container into a fire extinguishing target compartment is described in, for example, FIG. Some of them include an armature type closing member. [0003] That is, the valve device (51) has a housing
The foot screw (53) of (52) is connected to the neck of the fire extinguishing agent storage container (not shown), and the pipe (not shown) of the fire extinguishing equipment is connected to the nozzle (54) formed on the left side in the figure. You. In the housing (52), an inlet passage (55), a closing valve chamber (56) and an outlet passage (5
7) are sequentially formed, and an idler, that is, a piston-like closing member (58) is slidably inserted into the closing valve chamber (56). A closing valve seat (59) is formed on the outlet path (57) side of the closing valve chamber (56), and the closing member (58) is closed by a valve closing spring (60). They are being repressed. [0004] The closing valve seat (59) sandwiches the closing member (58).
A working chamber (61) is formed on the opposite side of the working chamber.
(61) is provided with a clearance between the outer peripheral surface (62) of the closing member (58) and the sliding surface (63) of the inner surface of the closing valve chamber (56) facing the closing member (58). It communicates with the room (56) and the entrance way (55).
Further, a lid member (64) is fixed behind the above-mentioned working chamber (61) (right side in the figure), and the working chamber (61) is attached to the lid member (64).
An exhaust path (65) is formed which communicates with the outside space, and the exhaust path (65) is sealed by a sealing plate (66) provided on the inner end side. [0005] When charging the fire extinguishing agent into the fire extinguishing agent storage container from the above valve device, the charging device is connected to the outlet passage (57).
(Not shown) is connected. The fire extinguishing agent supplied to the outlet path (57) closes the closing member (58) with the charging pressure and closes the valve spring (60).
The valve is opened against the resilient pressure of the fire extinguishing agent, and is charged into the fire extinguishing agent storage container via the closing valve chamber (56) and the inlet passage (55). At this time, the outer peripheral surface (62) of the closing member (58) and the sliding surface facing the outer peripheral surface (62)
(63), a portion of the extinguishing agent flows into the working chamber (61) from this gap, and as the extinguishing agent fills up, the inside of the shut-off valve chamber (56) and the working chamber (61) The pressure difference between the parentheses disappears. Thereby, when the filling is completed, the closing member (58) is resiliently pressed by the valve closing spring (60) and switches to the valve closing posture. [0006] When a fire occurs, a blade is inserted from an operation port (67) formed in the lid member (64), and the sealing plate (6) is inserted.
An opening is formed in 6). As a result, the fire extinguishing agent in the working chamber (61) is discharged to the external space from the exhaust path (65), and the fire extinguishing agent is discharged from the shutoff valve chamber (56) to the closing member (58) and the sliding surface.
(63) and flows into the working chamber (61). However, since the exhaust path (65) has a large diameter of, for example, about 8 mm, the discharge amount from the exhaust path (65) is larger than the inflow of the fire extinguishing agent, and the working chamber (61) is at atmospheric pressure. The pressure is quickly reduced until: As a result, the closing member (58) is closed by the closing valve chamber (5).
Due to the internal pressure of 6), the valve opens and moves against the elastic pressure of the valve closing spring (60), and the fire extinguishing agent flows from the storage container through the inlet path (55), the closing valve chamber (56), and the outlet path (57) in that order. It is supplied to the fire extinguishing target compartment. [0007] In recent years, the use of nitrogen gas or the like as the fire extinguisher has been proposed in place of halon gas due to the problem of destruction of the ozone layer. Since a large amount of gas is required for extinguishing the nitrogen gas as a fire extinguishing agent, the fire extinguishing agent storage container is desired to have a high pressure of, for example, 30 MPa so that a large amount of fire extinguishing agent can be stored compactly. I have. However, the above-mentioned conventional valve device is
When the storage pressure is increased, the internal pressure of the working chamber is also increased. Therefore, it is necessary to increase the wall thickness or use a high-strength material in order to increase the strength of the sealing plate. In addition, when the strength of the sealing plate is increased, a large force is required to break the blade by inserting the blade, so that the blade needs to be strengthened. Furthermore, it is necessary to tighten the sealing plate with a high tightening axial force. As a result, there is a problem that the entire apparatus is expensive and large. In order to increase the pressure of the fire extinguishing agent storage container without increasing the strength of the sealing plate, it is conceivable to reduce the size of the exhaust passage to, for example, a diameter of about 3 mm. In this case, since the discharge speed of the fire extinguishing agent from the working chamber becomes slow when the sealing plate is opened, the sliding member and the housing slide in order to sufficiently reduce the inflow from the closing valve chamber to the working chamber. It is necessary to reduce the gap with the moving surface. However, the gap for allowing the above-mentioned closing member to slide smoothly in the closing valve chamber cannot be made extremely small from the viewpoint of machining accuracy. For this reason, there is a problem that the flow rate of the fire extinguishing agent cannot be sufficiently reduced, and the closing member cannot be quickly opened. It is also conceivable to mount a spiral ring member (a so-called backup ring) having a cut end surface between the closing member and the sliding surface of the housing. However, since this backup ring does not originally seal between the members, it is not possible to seal the space between the closing surface and the sliding surface over the entire circumference of the closing member. Therefore, it is not easy to limit the amount of the fire extinguishing agent that passes between the closing member and the sliding surface to a predetermined amount or less. The present invention solves the above problems and provides a valve device for a fire extinguisher storage container that can be inexpensively implemented while increasing the filling pressure to increase the amount of fire extinguishing agent stored, and furthermore, can reduce the size of the entire device. Is a technical task. In order to solve the above problems, the present invention will be described with reference to FIGS. 1 to 7 showing an embodiment of the present invention. Is configured as follows. That is, the housing
In (2), an inlet passage (5), a closing valve chamber (6) and an outlet passage (7) are formed in this order, and a closing member (15) is slidably inserted into the closing valve chamber (6). Closed valve seat on exit path (7) side of closed valve chamber (6)
(16) is formed, and the closing member (15) is urged toward the closing valve seat (16) by the urging means (17), and the closing member is formed.
A working chamber (18) is formed on the opposite side of the closing valve seat (16) with (15) interposed therebetween, and the working chamber (18) is an exhaust passage sealed by a sealing plate (21).
(20), and an endless annular sealing member is provided on one of the outer peripheral surface (24) of the closing member (15) and the inner peripheral surface (27) of the closing valve chamber (6) opposed thereto. (26) is attached, a sliding surface (28) on which the sealing member (26) slides is formed on the other side, and at least one of the sealing member (26) and the sliding surface (28) is formed on the sliding surface (28). A communication path (30) for communicating the above-mentioned closing valve chamber (6) with the working chamber (18);
Is formed. When the communication path is provided in the annular sealing member, it may be provided in a groove shape on the surface of the sealing member.
It may be provided in a hole shape penetrating the sealing member. When the communication path is provided in the sliding surface in a groove shape, the communication path may be formed in a spiral shape or may be provided in a straight line parallel to the axis of the closing member. In addition, this communication path may be provided at only one place, or may be provided at a plurality of places in the circumferential direction. When the fire extinguishing agent is charged, a part of the fire extinguishing agent flows from the shut-off valve chamber into the working chamber through the communication path. For this reason, at the end of filling, the pressure difference between the closing valve chamber and the working chamber disappears, and the closing member is resiliently pressed by the valve closing spring to switch to the valve closing position. On the other hand, other than the communication path, since the space between the closing valve chamber and the working chamber is sealed by the sealing member,
By setting the communication passage to a predetermined small flow passage area, the amount of the fire extinguishing agent flowing into the working chamber can be made sufficiently smaller than the discharge amount from the discharge passage. As a result, when the sealing plate is opened at the time of a fire, the fire extinguishing agent in the working chamber is discharged from the exhaust path, and the working chamber is quickly depressurized, so that the closing member opens smoothly. FIG. 1 to FIG. 4 show a first embodiment of the present invention. FIG. 1 is a vertical sectional view of a valve device for a fire extinguishing agent storage container, and FIG. FIG. 3 is a sectional view of FIG.
FIG. 4 is an enlarged sectional view of a portion A of FIG. As shown in FIG. 1, a housing (2) of the valve device (1) is provided with a leg screw portion (2a) below, and
The leg screw (2a) is connected to the fire extinguishing agent storage container (3).
An entrance hole (4) is opened in the lower surface of the leg screw (2a). In the housing (2), an inlet passage (5), a closing valve chamber (6), and an outlet passage (7) are formed in order from the inlet hole (4). As shown in FIG. 1 and FIG.
A pressure reducing valve (8) is provided in the middle part of (7), and an outlet path (7)
Has an outlet hole (9) at the outer end. This exit hole (9)
The pipe (not shown) of the fire extinguishing equipment is connected to the power supply. In addition, above the closing valve chamber (6), a filling path (1) is provided between the valve and the filling port (10).
1) is formed so that the filling path (11) can be opened and closed by a needle valve (12). In addition, the above-mentioned entrance road
(5) is an intermediate part, a gas release path communicating with the safety valve (13).
(14) is branched. An idler (15), which is a piston-like closing member, is slidably inserted into the closing valve chamber (6). Further, a closing valve seat (16) is formed around an open end where the outlet path (7) opens to the closing valve chamber (6), and
5) is pressed against the closing valve seat (16) by a valve closing spring (17) as biasing means. An operating chamber (18) is formed behind the above-mentioned idler (15) (right side in the figure), that is, on the opposite side of the idler (15) from the closing valve seat (16). The rear wall of the working chamber (18) is sealed by a lid member (19), and a small diameter (for example, a diameter of 3 mm) communicating the working chamber (18) and the external space to the lid member (19).
Exhaust path (20) is formed. A sealing plate (2) is provided at an intermediate portion of the exhaust path (20).
1) is fixed by a plate retainer (22), and the sealing plate (21) seals the exhaust path (20). The plate holder (22) is provided with an operation port (23), and an opening tool (not shown) such as a blade is used to open the sealing plate (21). Two
It is configured so that it can be inserted from 3). As shown in FIG. 1, the above mover (15)
It consists of a main body (15a) and a fixing ring (15b), and by fixing this fixing ring (15b) to the main body (15a) by screwing, an annular shape is formed on the outer peripheral surface (24) of the movable element (15). The concave groove (25) is formed. As shown in FIGS. 1 and 3, an endless annular sealing member (26) having a U-shaped cross section is mounted in the concave groove (25). On the other hand, the closing valve chamber facing the outer peripheral surface (24) of the armature (15)
A sliding surface (28) on which the sealing member (26) slides is formed on the inner peripheral surface (27) of (6). As shown in FIGS. 3 and 4, the above sealing member
The lip (29) on the outer side of (26) has a groove-shaped communication passage (30) formed by cutting out one portion thereof, and the above-described closing valve chamber (6) is formed.
The working chamber (18) communicates with each other via the communication path (30). In this embodiment, the communication path (30) is formed at one position of the sealing member (26). However, in the present invention, the communication path may be formed at a plurality of positions of the sealing member. Next, a procedure for charging the fire extinguishing agent into the fire extinguishing agent storage container (3) from the valve device (1) will be described.
As the fire extinguishing agent, any gas having a fire extinguishing performance or a liquefied product thereof can be used, and examples thereof include nitrogen, carbon dioxide, and a halide extinguishing agent such as heptafluoropropane. . A filling device (not shown) is connected to the filling port (10), and the needle valve (12) is opened. As a result, the fire extinguishing agent passes through the charging passage (11), the shut-off valve chamber (6) and the inlet passage (5) in order, and the inlet hole (4)
From the extinguishing agent storage container (3). At this time, since the internal pressure of the closing valve chamber (6) increases due to the filling pressure, the idler (15) moves in the valve opening direction against the elastic pressure of the valve closing spring (17). A part of the fire extinguishing agent in the shut-off valve chamber (6) flows into the working chamber (18) through the communication passage (30), whereby the internal pressure of the working chamber (18) is reduced. Gradually increase. Further, the filling further proceeds, and at the end of the filling operation, the pressure difference between the closing valve chamber (6) and the working chamber (18) disappears, so that the idler (15) is elastically pressed by the valve closing spring (17) and closed. Switch to valve position. In addition,
In the first embodiment, the fire extinguishing agent was charged from the charging port (10). Instead, the pressure reducing valve (8) was forcibly opened, and the fire extinguishing agent was supplied from the outlet hole. It may be configured to fill. When a fire occurs, a puncture means such as a blade is inserted from the operation port (23), and an opening is formed in the sealing plate (21). As a result, the fire extinguishing agent in the working chamber (18) is discharged from the exhaust path (20) to the external space, and
From (6), the fire extinguishing agent passes through the communication passage (30) and the working chamber
(18). However, since the communication passage (30) has a small flow passage area, the amount of the fire extinguishing agent passing through the communication passage (30) is limited to the above-described exhaust passage (2).
It is much less than the emission from (0). As a result, the working chamber (18) is quickly depressurized, and the idler (15) is closed by the valve closing spring (17).
The fire-extinguishing agent in the storage container (3) flows out through the inlet passage (5) and the shut-off valve chamber (6) to the outlet passage (7). After being reduced to a predetermined pressure in (8),
It is supplied to the fire extinguishing target compartment. In the first embodiment, a part of an outer lip of the U-shaped sealing member (26) that slides on the sliding surface (28) is cut out to form the communication path ( Although 30) is configured, communication paths of other shapes can be formed, for example, as in a modified example shown in FIG. That is, in the first modified example shown in FIG. 5A, a groove-shaped communication path (30) is formed over the entire width of the outer surface of the sealing member (26). In a second modified example shown in FIG. 5B, a communication path (30) is formed by a through hole penetrating the sealing member (26). In the first embodiment, the sealing member (26) is mounted on the outer peripheral surface of the closing member (15). Alternatively, the sealing member (26) is mounted on the inner peripheral surface of the closing valve chamber (6). May be. FIG. 6 is a sectional view of a main part of a valve device for a fire extinguishing agent storage container according to a second embodiment of the present invention. In the second embodiment, unlike the first embodiment, an endless annular sealing member (26) is mounted on the inner peripheral surface (27) of the closing valve chamber (6). A sliding surface (28) on which the sealing member (26) slides is formed on the outer peripheral surface (24) of the child (15).
The sealing member (26) has an inner peripheral surface formed on a uniform sealing surface, and does not have a communication path as in the first embodiment. On the other hand, the above-mentioned idler (15) has the above-mentioned sliding surface (28).
A groove-shaped communication passage (30) is formed in a double spiral shape. The rest of the configuration is the same as that of the first embodiment and operates in the same manner, so that the description is omitted. In the second embodiment, two communication passages (30) are formed on the sliding surface. However, only one communication passage may be formed, or three or more communication passages may be formed. . Further, for example, as in a modified example shown in FIG. 7, the communication path (30) may be formed in a straight line parallel to the axis of the idler (15). In the above-described second embodiment, the sealing member (26) is mounted on the inner peripheral surface (27) of the closing valve chamber (6). A sliding surface (28) is formed on the inner peripheral surface (27) of the closing valve chamber (6), and a groove-shaped communication passage is formed on the sliding surface (28). May be formed. In the above embodiment, the valve device provided with the pressure reducing valve has been described. However, the present invention can be applied to a valve device not provided with the pressure reducing valve. Needless to say, it is not limited to the form. Since the present invention is configured as described above, the following operational effects can be obtained. Even if the exhaust path from the working chamber is formed with a small diameter,
The working chamber can be quickly depressurized, and the closing member can be smoothly opened. Therefore, it is possible to increase the filling pressure and increase the amount of fire extinguisher stored without strengthening the sealing plate attached to the exhaust path. Moreover, since the exhaust path can be formed with a small diameter, a high tightening axial force is not required, and further, the sealing plate does not need to be strengthened, so that it is not necessary to strengthen the blade body and the like and to enlarge the opening device. Therefore, the entire apparatus can be configured in a small size and can be implemented at a low cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical elevation view of a valve device for a fire extinguishing agent storage container, showing a first embodiment of the present invention. FIG. 2 is a sectional view taken along the line II-II in FIG. FIG. 3 is an enlarged sectional view of a portion A in FIG. 1; FIG. 4 is a plan view of the annular sealing member according to the first embodiment. FIG. 5 shows a modification of the first embodiment, and FIG.
FIG. 5B is an enlarged cross-sectional view of the vicinity of a sealing member according to a second modified example. FIG. 6 is a sectional view of a main part of a valve device, showing a second embodiment of the present invention. FIG. 7 is a side view of a mover, showing a modification of the second embodiment of the present invention. FIG. 8 is an elevational view showing a conventional technique, in which main parts are broken. [Description of Signs] 1 ... Valve device, 2 ... Housing, 5 ... Inlet path, 6 ... Closed valve chamber, 7 ... Outlet path, 15 ... Closed member (attractor), 16 ... Closed valve seat, 17 ... Biasing means (Valve closing spring), 18 ... working chamber, 20 ... exhaust path, 21 ... sealing plate, 24 ... outer peripheral surface of closing member (idle), 26 ... sealing member, 27 ... inner peripheral surface of closing valve chamber, 28 ... Sliding surface.

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor: Comet Oi             4-6-1 Shimosakabe, Amagasaki City, Hyogo Prefecture             Inside the company Neriki (72) Inventor Mitsumasa Kagomoto             4-6-1 Shimosakabe, Amagasaki City, Hyogo Prefecture             Inside the company Neriki (72) Inventor Fuuji Maekawa             4-6-1 Shimosakabe, Amagasaki City, Hyogo Prefecture             Inside the company Neriki (72) Inventor Shigeru Tsuzuka             3-2-16 Takatsudai, Nishi-ku, Kobe-shi, Hyogo Prefecture             Kawaju Disaster Prevention Industry Co., Ltd. F-term (reference) 2E189 BA03 BB04 BC01

Claims (1)

Claims: 1. An inlet passage (5) and a closing valve chamber in a housing (2).
(6) and an outlet path (7) are formed in order, and a closing member (15) is slidably inserted into the closing valve chamber (6), and the outlet path (7) of the closing valve chamber (6) is formed. A closing valve seat (16) is formed on the side, and the closing member (15) is urged toward the closing valve seat (16) by a biasing means (17), thereby closing the closing member (15). A working chamber (18) is formed on the opposite side to the closing valve seat (16), and the working chamber (18) includes an exhaust passage (20) sealed with a sealing plate (21). Attaching an endless annular sealing member (26) to one of the outer peripheral surface (24) of the closing member (15) and the inner peripheral surface (27) of the closing valve chamber (6) facing the same, On the other hand, this sealing member
(26) forms a sliding surface (28) in sliding contact, and at least one of the sealing member (26) and the sliding surface (28) has the closing valve chamber (6) and the working chamber (18). ), A communication passage (30) for communication with the extinguishing agent storage container is formed.