JP3030857B2 - Method and apparatus for preventing damage to airtight ring for selection valve of fire fighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for preventing damage to an airtight ring for a selection valve of a fire fighting equipment, and more particularly, to a method for preventing damage to an airtight ring provided in a discharge pipe of a fire fighting equipment. The present invention relates to a method and a device for preventing damage to an airtight ring for a selection valve of fire fighting equipment for preventing airtight rings used for airtightness between a plunger and a selection valve.

[0002]

2. Description of the Related Art With the development of industry, dwellings and office buildings tend to be increasingly high-rise and sophisticated. In response to these trends, in each area related to building management,
Automation of building management is being continued. Typical examples of facilities that have automated building management include fire prevention facilities and fire suppression facilities. In the fire prevention and extinguishing facilities as described above, usually, a large number of fire extinguishing means such as fire detecting means and sprinklers are distributed in each layer of the building, and a control device for controlling the fire extinguishing means is provided on the first or second basement floor. It is provided so that the administrator can check these at all times. In such a fire prevention and extinguishing facility, a fire detector provided on each floor of the building detects smoke or heat and sends a fire occurrence signal to a control device disposed underground. When a fire detection signal is input to the control system in this way, sound signals,
That is, by sounding an alarm signal, a few seconds after the residents and users are evacuated, fire suppression gas and fire suppression water are supplied to sprinklers provided in advance on each floor of the building, and the fire is spouted to cause an early fire. Can be extinguished.

In this case, the fire extinguishing gas is supplied through an operation process of the following system according to an operation signal of the control system. First, the solenoid is operated by an electric signal to open the flow path of the compressed gas for opening the selection valve. Thereby, the opening compressed gas is supplied to the flow passage along the guide hose. The supplied compressed gas for opening operates the actuator provided at the upper part of the selection valve, and presses the operating piece connected laterally with the pin to the outside of the end of the operating rod, which is horizontally disposed while being elastically held by the spring. Then, the operating rod is rotated in one direction. When the operating rod is rotated by a predetermined amount in one direction by the compressed gas for opening, the end of the stopper supported on the lower surface of the space formed in the middle of the operating rod is located in the space, and the elastic pressure is maintained. The held stopper is released from its holding and rotated upward by the elastic force of the spring, and the plunger located inside the selection valve becomes operable. By releasing the stopper in this manner, the plunger provided in the main body of the selection valve is made operable, and then the opening compressed gas flows along the discharge port on one side of the actuator and its guide hose. Then, the actuator provided on the upper part of the fire extinguishing gas container is operated to open the passage of the fire extinguishing gas. The open compressed gas is then recovered and reused or, if harmless, is released to the atmosphere. When the fire extinguishing gas passage is opened by the opening compressed gas, the fire extinguishing gas flows along the pipeline, reaches the lower part of the selection valve, and the gas pressure causes the fixed-released plunger to move to the upper part. Open the inside of the main body of the selection valve while pushing it up. The fire extinguishing gas flows along a gas flow passage communicating with one side inside the main body of the selection valve. In this way, the fire extinguishing gas flowing from the gas flow passage is supplied to the sprinklers of the respective layers of the building where the fire is generated, and is injected and ejected, whereby fire extinguishing work can be performed.

However, the plunger provided inside the selection valve is formed so as to form a gas flow passage therein while being pushed up by the jet pressure of the fire-extinguishing gas, that is, the gas pressure. An air-tight ring (O-ring) fitted on the lower side surface of the plunger is pushed up while abutting on the inner surface of the selection valve while rapidly rising due to the jetting pressure of the fire-extinguishing gas, and the contact surface is turned upside down. Detach from the lower side of the plunger while being deformed,
There was a problem of being separated. The airtight ring detached from the lower side surface of the plunger as described above,
If the selection valve is reused without finding the detached hermetic ring in the recovery process after the fire extinguishing work because it remains inside the selection valve as it is, the remaining detached hermetic ring will This may cause an accident, for example, when the pipe is partially closed or gas may leak through a place where the airtight ring is detached. In order to eliminate the danger of inducing such accidents, during recovery work after a fire, the used selection valve was discarded and replaced with a new product, and this was replaced with simple parts. The expensive selection valve itself must be replaced in order to prevent detachment of the airtight ring from the plunger due to structural defects, which is very uneconomical and shortens the service life of the selection valve. .

[0005]

In order to solve such a conventional problem, the applicant of the present application has proposed an invention as shown in FIGS. 7 and 8 in an earlier application.

According to the present invention, a stopper is provided in which an airtight ring 3 is fitted to a lower portion of a plunger body 2 which is provided inside a selection valve 1 so as to be able to move up and down, and an upper surface of the plunger body 2 is elastically supported by an upper outside of the selection valve 1. 4 is configured as a fire-fighting facility that opens and closes an internal passage of the selection valve 1.

Below the plunger main body 2, there is provided a coupling body 5 which is configured as a separate member separate from the plunger main body 2 and is coupled to the plunger main body 2, as shown in FIG. An airtight ring 3 formed so as not to be detachable is inserted and supported on the upper surface of the coupling body 5, and the plunger body 2 and the coupling body 5 are mutually coupled by screws. More specifically, the lower surface of the plunger body 2 has a round edge 21.
Are formed integrally with the plunger body 2 in such a manner as to protrude. On the other hand, the upper surface of the combined body 5 is formed integrally with the combined body 5 in such a manner that a round edge 41 protrudes.

The airtight ring 3 has an upper hanging piece 31 fitted on an inner surface of a round edge 21 formed on a lower surface of the plunger 2 main body, and a projecting surface 33 at an intermediate portion thereof formed on a lower portion of the plunger 2 main body. It is provided so as to be exposed between the round edge 21 and the round edge 41 protrudingly formed on the outer periphery of the combined body 5. In addition, the airtight ring 3 is fitted on the inner surface of a round edge 41 in which the lower hanging piece 32 protrudes from the upper surface of the combined body 5. A screw hole 22 is formed in the center of the plunger body 2. On the other hand, screw holes 22
Is formed. The plunger body 2 and the connecting portion 5 are connected by screwing the screw hole 22 and a screw portion formed on the upper portion of the connecting body 5.

According to the invention of the applicant's earlier application having the above-described configuration, the connection structure of the airtight ring of the plunger mounted inside the selection valve is improved so that the airtight ring is separated from and separated from the plunger. As a result, the service life of the hermetic ring can be maintained for a long time, and the economy, that is, the cost and time required for the restoration work can be reduced. However, in general, when the plunger 2 is mounted in the selection valve 1 by the gas pressure of the fire extinguishing gas, the hermetic ring 3 is deformed between the inner surface of the selection valve 1 and the hermetic ring 3 and the protruding round edge 41. A space is created between them.

[0010] Therefore, in the invention of the earlier application by the present applicant, when the plunger 2 is raised by the selection valve 1, the fire extinguishing gas is drawn into the space between the hermetic ring 3 and the protruding round edge 41. I will be. Further, when the plunger 2 in an operable state is pushed upward by the gas pressure of the fire-extinguishing gas, the moment of the gas generated when the fire-extinguishing gas maintaining a high pressure is ejected from between the plunger 2 and the selection valve 1. Ring 3
Of the airtight ring 3 is dropped from the mounting position, or the airtight ring 3 is detached from the mounting position toward the outside where a relatively negative pressure is formed. In this case, the space formed between the hermetic ring 3 and the protruding round edge 41 is filled with the fire extinguishing gas, and the hermetic ring 3 cannot be returned to the original position. there were.

Accordingly, the present invention prevents damage to the airtight ring and disengagement of the airtight ring, eliminates the need to replace the airtight ring after use, saves the original material, and makes it easy to perform the recovery work for the next use. It is an object of the present invention to provide a method and an apparatus for preventing damage to an airtight ring for a selection valve of a firefighting facility, which can be completed.

[0012]

In order to solve the above-mentioned problems, a method for preventing damage to a gas-tight ring for a selection valve of a fire-fighting equipment according to the present invention is described below. A ring is fitted, and an upper surface of the plunger main body is held by a stopper elastically supported at an outer upper portion of the selection valve to open and close an internal passage of the selection valve. While the insertion part is formed on the surface and the coupling part is formed in the center,
An insertion portion is formed on an outer peripheral surface of a coupling body coupled to a lower portion of the plunger body, and a coupling portion is formed at the center, and the hermetic ring having a T-shaped cross section is formed between the insertion portion of the plunger body and the coupling body. In the firefighting equipment inserted between the plunger body and the coupling body through the respective coupling portions of the plunger body and the coupling body, At the upper end of the outer peripheral surface of the insertion portion, a reverse flow guiding groove is formed along the outer peripheral surface of the insertion portion of the plunger body, and a discharge hole communicating with the insertion portion of the coupling body is formed in the insertion portion of the coupling body. A large number of holes are drilled along the outer peripheral surface, a curved concave portion is formed in the lower center of the coupling body, and a stopper that supports and fixes the upper portion of the plunger is released,
When the plunger is raised by the fire-extinguishing gas to form a flow path for the fire-extinguishing compressed gas inside the selection valve, the compressed gas drawn into the insertion portion of the combination is discharged to the outside along the discharge hole. at the same time when the air tight ring so as to to block the position disengaged by the compressed gas, that was so that to reach the airtight ring the compressed gas released to the outside by reflux in the reflux induction groove portion Features.

Further, in the fire prevention equipment according to the present invention, the airtight ring for a selection valve is prevented from being damaged. The airtight ring 3 is fitted to a lower portion of a plunger body 2 provided inside the selection valve 1 so as to be movable up and down. Is supported by a stopper 4 that supports the outer portion of the selection valve 1 by resilient pressure to open and close an internal passage of the selection valve 1. An insertion portion 51 is provided on a lower surface of the plunger body 2, and a coupling screw portion 52 is provided at the center. Are respectively formed, and are connected to the lower portion of the plunger body 2.
The insertion portion 61 on the outer peripheral surface of formed coupling screw part 62 at the center, respectively, the insertion portion 61 of the coupling member 5 in cross-section air-tight ring 3 which is configured in the form T is the insertion portion 51 of the plunger body 2
In the fire-fighting equipment in which the plunger main body 2 and the coupling body 5 are coupled with each other, the upper end of the outer peripheral surface of the insertion portion 51 of the plunger main body 2 A backflow guide groove 53 is formed along the outer peripheral surface, and a large number of discharge holes 63 are formed in the insertion portion 61 of the combined body 5 along the outer peripheral surface of the insertion portion 61 of the combined body 5. It is characterized by the following.

Further, the present invention is preferably characterized in that the curved concave portion 64 formed at the center of the joint body 5 is formed with an inclined portion 64 'at an end portion inside the inner peripheral edge thereof.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to FIGS. In the embodiments of the present invention, parts having the same configuration as the invention of the earlier application of the applicant of the present application are partially omitted from the drawings and will be described with reference to FIGS. 7 and 8. . FIG. 1 is a cross-sectional view of a main part showing a connected state of a plunger used in a selection valve, showing an embodiment of an apparatus used in a method for preventing damage to a gas-tight ring for a selection valve of a firefighting equipment of the present invention. FIG. 2 is a reference perspective view showing the airtight ring assembly of the present embodiment. FIG. 3 is a cross-sectional view illustrating a modification of the hermetic ring combination according to the present embodiment. FIG. 4 is a sectional view of a main part showing a closed state of the selection valve of the present embodiment. FIG. 5 is a sectional view of a main part showing an opening operation state of the selection valve of the present embodiment. FIG. 6 is a sectional view of a main part showing an open state of the selection valve of the present embodiment. The firefighting equipment according to the present embodiment has a configuration in which the plunger body 2 opens and closes the selection valve 1 through an internal passage of the selection valve 1 as shown in FIG. The plunger body 2 is provided inside the selection valve 1 so as to be movable up and down. An airtight ring 3 is fitted to a lower portion of the plunger body 2. The upper surface of the plunger main body 2 is supported by a stopper 4 which is elastically supported on the upper outside of the selection valve 1.

As shown in FIG. 1, an insertion portion 51 is formed on the lower surface of the plunger main body 2 and a connecting screw portion 52 is formed at the center thereof. The plunger main body 2 is connected to the connecting body 5 at a lower portion thereof. It is supposed to. An insertion portion 61 is formed on the outer peripheral surface of the coupling body 5, and a coupling screw portion 52 is formed in the center. The hermetic ring 3 is formed in a T shape. Further, the airtight ring 3 is inserted into the insertion portion 5 of the plunger body 2.
1 and the insertion portion 61 of the combined body 5. Then, the plunger body 2 and the joint body 5 are connected to the hermetic ring 3
Are connected to each other with the connecting tool 70 via the connecting screw portions 52 and 62 in a state where they are fitted. At the upper end of the outer peripheral surface of the insertion portion 51 of the plunger body 2, a backflow guiding groove 53 is formed along the outer peripheral surface. Insertion part 6 of combined body 5
1 and 2, a large number of discharge holes 63 communicating with the insertion portion 61 are formed along the outer peripheral surface of the insertion portion 61. Further, a curved concave portion 64 is formed at the lower center of the combined body 5 as shown in FIG.

An actuator (not shown) is provided above the selection valve 1. As shown in FIG. 7, an assembly 11 for supporting the plunger body 2 fitted on the inner surface thereof is provided below the selection valve 1.

The lower portion of the plunger body 2 of the present embodiment is fitted into the main body of the selection valve 1 according to an existing assembling method, and the lower portion is supported and fixed by the assembly 11. In this case, the hermetic ring 3 is inserted into the main body of the selection valve 1 while being in close contact with the inner peripheral surface of the assembly 11, so that the hermetic ring 3 is inserted in a direction opposite to the insertion direction as shown in FIG. Deflected deformation occurs.

The operation of the fire-fighting equipment having the above-described structure of the fire-fighting equipment according to the present embodiment and having the apparatus for preventing damage to the airtight ring for the selection valve will be described. When a fire occurs, a control system (not shown) that detects the fire and receives a fire detection signal emits an alarm sound, and a few seconds after the alarm sounds, the release compressed gas is released by the operation of the solenoid. An actuator (not shown) provided on the upper part of the device 1 is operated.

The stopper 4 supporting the upper part of the plunger body 2 is released from the fixed state by the operation of the actuator, and the support of the plunger body 2 by the stopper 4 is released.

When the fire-extinguishing gas container is opened in such a state, the fire-extinguishing high-pressure gas is supplied to the main line 80 shown in FIG.
And pushes up the plunger body 2 which has been released from being supported at the lower part of the selection valve 1 (FIG. 5). As a result, the flow path of the fire extinguishing high-pressure gas is opened inside the selection valve 1 (FIG. 6).

When the flow path of the high-pressure fire extinguishing gas is opened in this way, the high-pressure fire extinguishing gas flowing along the pipe line 80 passes through the sprinkler already provided at each of the fire occurrence locations in the building. It can be erupted to extinguish fires.

In this case, when the high-pressure fire extinguishing gas pushes up the plunger body 2 by the high-pressure fire extinguishing gas to open the flow passage of the high-pressure fire extinguishing gas inside the selection valve 1 as described above, the high-pressure fire extinguishing gas is combined with the plunger body 2. It is discharged from a fine space formed between the three-dimensional object 11.

At this time, the high-pressure fire extinguishing gas itself maintains a high pressure state, and at the moment when the plunger body 2 rises to open the gas flow passage, the gas is discharged into the flow passage. The fire extinguishing high-pressure gas is exhausted at a considerable speed because the space is smaller.

For this reason, when the conventional fire extinguisher is used, a part of the hermetic ring 3 is dropped due to the instantaneous jet power of the fire extinguishing high-pressure gas, and the pressure is relatively low.
The negative pressure causes the position to be released to the outside, and the insertion portion 61 of the combined body 5 is deformed by the deformation of the airtight ring 3 as described above.
Since a predetermined amount of space is formed and the space is filled with the compressed gas, there is a problem that the hermetic ring 3 cannot be returned to the original position.

In this respect, in this embodiment, since the curved concave portion 64 is formed at the lower center of the combined body 5, the fire-extinguishing compressed gas is
It is not immediately discharged to the outside, but once collides with the curved concave portion 64 of the combined body 5 and is induced to flow backward, and is discharged while weakening the flow (FIG. 5).

In the present embodiment, the insertion portion 6 of the combined body 5
Since a large number of discharge holes 63 communicating with this are formed along the outer peripheral surface of the fire extinguisher 1, a predetermined space of the insertion portion 61 of the combined body 5 is filled by deformation of the airtight ring 3 as described above. Since the compressed gas is drawn in and discharged to the outside along the discharge hole 63 at the same time, the hermetic ring 3 is prevented from being displaced by the fire-extinguishing compressed gas.

In this embodiment, the plunger body 2
Is formed at the upper end of the outer peripheral surface of the insertion portion 51 along the outer peripheral surface thereof.
When the compressed gas for fire extinguishing is discharged by flowing back at 3 and reaching the upper end of the hermetic ring 3, the force of the hermetic ring 3 to move in the direction in which the discharging force of the compressed gas for fire extinguishing is suppressed, The hermetic ring 3 is not detached from its original position (FIG. 6).

That is, in the present embodiment, by forcibly inducing the flow of the compressed gas to be discharged, the flow of the gas in the discharge direction is weakened, and the separation of the airtight ring can be prevented. .

Note that the curved concave portion 64 formed in the combined body 5 of the present embodiment is not limited to the form shown in FIG. For example, the inner peripheral edge inside the terminal if necessary a curved recess 64 formed in the bottom center of the coupling member 5, as shown in FIG. 3, another curved recess 64 to the outer peripheral surface of the coupling member 5
An inclined curved portion 64 'having a steeper inclination angle than that of the portion is formed to increase the backflow angle when discharging the fire-extinguishing compressed gas to further reduce the momentum of the flow discharged to the outside. It may be.

[0031]

As described above, according to the present invention, it is possible to prevent damage to the hermetic ring and disengagement of the hermetic ring, eliminate the need to replace the hermetic ring after use, save the original material, and recover the material for the next use. Work can be completed easily.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing a connected state of a plunger used in a selection valve, showing an embodiment of an apparatus used in a method for preventing damage to a gas-tight ring for a selection valve of a fire fighting equipment of the present invention.

FIG. 2 is a reference perspective view showing an airtight ring assembly according to the present embodiment.

FIG. 3 is a cross-sectional view showing a modification of the hermetic ring assembly according to the embodiment.

FIG. 4 is a cross-sectional view of a main part showing a closed state of the selection valve of the present embodiment.

FIG. 5 is a sectional view of a main part showing an opening operation state of the selection valve of the embodiment.

FIG. 6 is a sectional view of a main part showing an open state of the selection valve of the present embodiment.

FIG. 7 is a partial cross-sectional view showing a structure of a selection valve of a firefighting equipment applied to the present invention.

FIG. 8 is a cross-sectional view of a main part showing a connected state of a plunger used for a selection valve of fire fighting equipment applied to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Selection valve 2 Plunger main body 3 Airtight ring 4 Stopper 5 Combined body 11 Assembly 51, 61 Insertion part 53 Backflow guidance concave groove part 63 Discharge hole 64 Curved concave part 80 Pipe line

──────────────────────────────────────────────────続 き Continuation of the front page (73) Patent holders 597102945 448-188, Hakeun-Ri, Yangchon-Myun, Kimpo-Kun, Kyongki-Do, Korea (58) Fields investigated (Int. Cl. ⁷ , DB name) F16K 3/00-3/36 F16K 47/00-51/02 A62C 13/76

Claims (3)

(57) [Claims] An airtight ring is fitted to a lower portion of a plunger body provided to be able to move up and down inside a selection valve,
An upper surface of the plunger body is supported by a stopper which is elastically supported at an upper portion of the outside of the selection valve, and is configured to open and close an internal passage of the selection valve. The airtight ring is formed with an insertion portion on an outer peripheral surface of a coupling body coupled to a lower portion of the plunger body, a coupling portion formed at a center thereof, and a T-shaped cross section. The plunger body is inserted between the insertion portion of the plunger body and the insertion portion of the coupling body, and the plunger body and the coupling body are coupled via the coupling portions of the plunger body and the coupling body. In the fire-fighting equipment, a backflow guide is provided at the upper end of the outer peripheral surface of the insertion portion of the plunger body along the outer peripheral surface of the insertion portion of the plunger body. In addition to forming a groove, a large number of discharge holes communicating with the insertion portion of the combined body are drilled along the outer peripheral surface of the insertion portion of the combined body, and a curved concave portion is formed in the lower center of the combined body. When the fire extinguishing gas is discharged, the flow of the fire extinguishing compressed gas is reversed in the curved concave portion to weaken the flow, so that the fire extinguishing compressed gas is discharged to the outside. Out of the gas, the fire-extinguishing compressed gas drawn into the insertion portion of the combination is discharged to the outside along the discharge hole.
It is to so that so, damage prevention method of the airtight ring for selection valve being characterized in that so as to extinguishing compressed gas discharged to the outside by reflux in the reflux induction groove portion to reach the airtight ring. 2. An airtight ring 3 is fitted to a lower portion of a plunger body 2 provided inside the selection valve 1 so as to be able to move up and down, and an upper surface of the plunger body 2 is supported by a stopper 4 which is elastically supported by an upper outside of the selection valve 1. Being
A coupling body that is configured to open and close the internal passage of the selection valve 1, has an insertion portion 51 formed at a lower surface of the plunger body 2, and a coupling screw portion 52 formed at the center thereof, and is coupled to a lower portion of the plunger body 2. 5 on the outer peripheral surface
1, a hermetic ring 3 having a coupling screw portion 62 formed at the center thereof and having a T-shaped cross section is inserted between the insertion portion 51 of the plunger body 2 and the insertion portion 61 of the coupling body 5, In the fire-fighting equipment in which the plunger body 2 and the coupling body 5 are connected, a backflow guide groove is formed at the upper end of the outer peripheral surface of the insertion portion 51 of the plunger body 2 along the outer peripheral surface of the insertion portion 51 of the plunger body 2. 53, and a large number of discharge holes 63 communicating with the insertion portion 61 of the combined body 5 are formed along the outer peripheral surface of the insertion portion 61 of the combined body 5,
A device for preventing damage to an airtight ring for a selection valve of a fire fighting facility, wherein a curved concave portion 64 is formed in a lower center portion of a combined body 5. 3. A curved concave portion 6 formed at the center of the coupling body 5.
4 has an outer periphery of the combined body 5 at a terminal portion inside the inner periphery.
The device for preventing damage to a gas-tight ring for a selection valve of a fire fighting system according to claim 2, wherein an inclined portion 64 'having an inclination angle steeper than other portions of the curved concave portion 64 is formed with respect to the surface.