KR200445432Y1 - A combined alarm valve for fire fighting - Google Patents

Abstract

The present invention relates to a fire alarm composite alarm valve, the primary inlet chamber 122 through which water of the supply pressure is introduced and the secondary side outlet chamber 124 and the size of the opening degree through which the high-pressure water flows through the opening degree A fire fighting combined alarm valve (20) having a main valve (12) including a diaphragm chamber (126), the predetermined pressure being lower than the supply pressure of the fire water flowing through the outlet chamber (124). Decompression means for reducing the pressure between a first set pressure and a second predetermined set pressure higher than the predetermined first set pressure but lower than the supply pressure; And it may include an alarm means for outputting an alarm signal when the size of the opening degree of the main valve 12 reaches a predetermined level. Accordingly, by improving and integrating the decompression function and the alarm function into one valve, the structure of the fire water piping system is simplified and the structure is simple, so that the system can be easily installed and maintained and inexpensively configured. You can get it.

Fire Protection, Alarm Valve, Pressure Reducing Valve, Limit Switch, Check Valve, Pilot Valve, Relief

Description

A COMBINED ALARM VALVE FOR FIRE FIGHTING

The present invention generally relates to a fire valve for a fire sprinkler facility or an indoor fire hydrant system in a building. More specifically, an alarm function and a high pressure fire water to notify a situation such as fire water sprayed through a sprinkler or a fire hydrant are maintained at a constant pressure. The present invention relates to a new fire alarm combination alarm valve that can significantly reduce system configuration and cost by improving and integrating a pressure reducing function.

In general, indoor sprinkler equipment and indoor fire hydrant systems in firefighting systems must satisfy the regulations that fire fighting pressure at each end should not exceed 12kg / cm2 (spring cooler) and 7kg / cm2 (fire hydrant), respectively. . Since water pressure above this specified pressure is normally supplied through a pump, for example, before each sprinkler and pre-fired pipe supply, the pressure must be reduced through a decompression device, and then fire water of a reference pressure according to legal regulations must be supplied.

However, as shown in FIG. 1, when building a fire fighting system in a high-rise building of, for example, 60 floors, generally, the fire fighting water from the ground fire fighting tank 1 should be supplied for each floor. Normally as the pressure rises from the ground level to the upper level, the pressure naturally falls by gravity, so very high pressure fire water must be supplied from the ground level to maintain proper water pressure to the last top layer. For this purpose, the high pressure fire water is raised to the upper layer by using the high pressure pumps 4 and 5.

An example of the conventional fireman piping system shown is applied to a 60-storey building, divided into three zones, the first to the 20th floors are the lower floor zone 3a, and the 21st to 40th floors are the middle floor zone ( 2) and the 41st to 60th floors are managed by the high-rise zone (3). In the ground floor, the fire pumps are supplied to the 21st to 40th floors through the mezzanine supply pipes 6 using the mezzanine pump 4, and again supplied to the schedule pipes 6a and 6b branched to the respective floors at an appropriate pressure. Pressure reducing valves 9a and 9b are provided for this purpose. High-rise zone (3) is a high-pressure fire water supply through the high-rise supply pipe (7) through a high-rise supply pipe (7) to supply the fire water from the 41st to 60th floor, the schedule piping (7a, branched to each floor) 7b) are provided with pressure reducing valves 9c and 9d in order to supply them at an appropriate pressure again. On the other hand, in the lower zone zone 3a, the fire water once depressurized through the high-rise and low-pressure relief valve 9 is supplied to the first to twenty-first floors through the high-rise and the low-pressure relief valves 9 branched from the high-rise supply pipe 7. The pressure reducing valves 9e and 9f are provided in the schedule pipes 8a and 8b branching to the respective floors so as to supply them at an appropriate pressure again. In addition, drain pipes 6c, 7c, and 8c for leaking water are connected to each pipe.

An example of a valve that can be used as the pressure reducing valves 9, 9a, 9b, 9c, 9d, 9e, and 9f installed in the schedule pipe inlet for each floor will be described with reference to the pressure reducing valve 10 illustrated in FIG. . The illustrated pressure reducing valve 10 is a type of the OCV Pressure Reducing valve Series 127 series manufactured by OCV Control Valves, for example. The diaphragm-type main valve 12 and the pilot valve which flow out after being decompressed after being supplied with high pressure water 14, and the ejector 16 has a configuration. At the time of supply of the fire water, high pressure water is supplied to the primary side of the main valve 12, that is, the inflow chamber 122, in the operation of the pressure reducing valve 10, and the central diaphragm is supplied by the high pressure of the supplied water. The decompressed water flows out to the secondary side, that is, toward the outlet chamber 124 while moving and opening.

The outlet chamber 124 and the diaphragm chamber 126 at the upper portion of the diaphragm are connected by a pilot valve 14, and the inlet chamber 122 and the diaphragm chamber 126 are also ejectors 16 and The strainers 18 are connected to each other. If the pressure of the outlet chamber 124 is set to be equal to the water pressure prescribed in the fire law, the pilot valve 14 maintains a constant opening degree, and passes through the pilot valve 14 from the inlet chamber 122. Although water flows into the outlet chamber 124, the water pressure of the water prevents the inflow / outflow of water from the diaphragm chamber 126. In this case, since the main valve 12 maintains a constant opening degree, water of a constant water pressure, that is, fire water is supplied through the main valve 12.

If the pressure of the outlet chamber 124 is less than the set pressure, the pilot valve 14 detects the low pressure of the outlet chamber 124 and is further opened, passing through the control valve 15 from the diaphragm chamber 126. Water flows out through the pilot valve 14 into the outflow chamber 124, and thus the diaphragm is lifted up so that the main valve 12 is opened slightly further from the inflow chamber 122 to the outflow chamber 124. Since more water flows, the pressure in the outlet chamber 124 may be increased to the set pressure.

If the pressure of the outflow chamber 124 is higher than the set pressure, the pilot valve 14 detects the high pressure of the outflow chamber 124 and automatically closes slightly. In this case, since water is supplied from the inlet chamber 122 to the diaphragm chamber 126 and a small amount of water is supplied, the main valve 12 is slightly closed, and thus the pressure of the outlet chamber 124 may be dropped to become the set pressure. .

As such, when the pressure reducing valve as shown in FIG. 2 is applied, an advantage of reducing the supply pressure of the fire water to the set pressure could be provided. However, in general, the fire fighting pipe is characterized by being in a state of not using the fire water for a long time. In fire-fighting systems, the use of fire-fighting water is longer than in the case of use of fire-fighting water (ie in the event of a fire), but even when no fire-fighting water is used, the set pressure required by the installation must always be maintained.

However, due to the following reasons, the secondary pressure of the pressure reducing valve is excessively higher than the set pressure may cause a lot of problems in the fire fighting equipment.

1) Change in the pressure of fire water inlet (primary side)

2) Pressure change by changing water temperature and dissolved oxygen in the pipe

3) Pressure rise due to leakage of pressure reducing valve

4) Pressure rise that may occur before and after the pressure reducing valve

The main reason that the secondary pressure of the pressure reducing valve becomes higher than the set pressure when the fire water is not used is because of the reason of the above 3), that is, very small leakage of water continuously occurs on the secondary side of the pressure reducing valve. This is a structural problem in which leakage from the pilot valve is essential. As a result, the pressure reducing valve primary side and the secondary side pressure are changed to the same pressure state, that is, the equal pressure state. For this reason, the problem that a secondary pipe may not be able to withstand pressure and it may burst may arise, and the complaints of fire-fighting officials are prevalent.

On the other hand, although not shown in Figure 1, each floor schedule pipe (6a, 6b, 7a, 7b, 8a, 8b) to be alarmed in the event of a fire is sprayed from a terminal device such as a sprinkler, for example Alarm valves for the purpose of operation, check valves for preventing the backflow and other safety devices are installed.

As described above, in the fire-fighting piping system installed in a high-rise building and the like, in addition to the pressure control problem due to the structural defect of the pressure reducing valve, the alarm valve and the check valve are all installed as separate parts, so the overall structure is complicated and installed. There are various problems such as difficulty in making it difficult and time-consuming to diagnose and repair in case of failure.

Therefore, it is possible to improve the alarm function for notifying the situation that fire water is sprayed through sprinkler or fire hydrant, and to reduce the high pressure fire water to a certain pressure, and to reduce the integrated system configuration and cost significantly. There is an urgent need for new fire alarm combinations that eliminate unnecessary costs in piping.

The present invention is designed to solve the problems of the above-described conventional fire valve, and the alarm function for notifying the situation such as the fire water is sprayed through the sprinkler or fire hydrant and the decompression function for reducing the high pressure fire water to a constant pressure, etc. It is possible to reduce the system configuration and cost by improving and integrating, and to maintain the constant pressure difference between the primary side and the secondary side of the pressure reducing valve even in the absence of fluid flow. The aim is to provide a new fire fighting composite alarm valve that eliminates unnecessary costs.

The object is achieved by a combined fire alarm valve provided in accordance with the present invention.

Fire alarm composite alarm valve according to an embodiment of the present invention, the primary inlet chamber into which the water of the supply pressure is introduced and the secondary side outlet chamber through which the high-pressure water is discharged through the opening and the diamond for adjusting the size of the opening A fire fighting composite alarm valve having a main valve including a fram chamber, wherein the pressure of the fire water flowing in the outlet chamber is higher than the predetermined first set pressure and the predetermined first set pressure but lower than the supply pressure. Decompression means for depressurizing within a predetermined second set pressure lower than the pressure; And it may include an alarm means for outputting an alarm signal when the size of the opening degree of the main valve reaches a predetermined level.

In another embodiment of the present invention, the alarm means is a limit switch assembly configured to operate when the linear movement made according to the size of the opening degree of the main valve reaches a predetermined level.

In another embodiment of the present invention, the ejector for connecting the inlet chamber and the diaphragm chamber from the outside of the main valve; And a pilot valve connecting the outlet chamber and the diaphragm chamber to the outside of the main valve via the ejector, wherein the pressure of the outlet chamber is lower than the first set pressure. An ejector and the pilot valve operate to allow a small amount of water from the diaphragm chamber to flow out of the outflow chamber, thereby increasing the opening of the main valve; On the other hand, when the pressure of the outlet chamber is higher than the second set pressure, the ejector and the pilot valve may be configured to operate so that a small amount of water flows into the diaphragm chamber so that the opening degree of the main valve is smaller. have.

In another embodiment of the present invention, it further comprises a check valve installed between the ejector and the inlet chamber to block the fire water flowing back from the ejector side to the inlet chamber side.

In another embodiment of the present invention, further comprises a relief pilot valve for connecting between the outlet chamber and the outlet communicated from the outlet chamber, when the pressure of the outlet chamber is higher than the second set pressure, The relief pilot valve may be configured to allow a small amount of water to be discharged from the outlet chamber so that the pressure of the outlet chamber falls below the second set pressure.

In still another embodiment of the present invention, the second set pressure may be 0.2 ~ 0.5 kg / ㎠ higher than the first set pressure.

The present invention having the purpose and configuration as described above, the alarm function for notifying the situation such as the fire water is sprayed through the sprinkler or fire hydrant and the decompression function for reducing the high pressure fire water to a constant pressure, etc. and integrated system configuration It is possible to reduce the complexity and greatly reduce the cost of the fire extinguisher, and to provide a significant fire protection alarm valve, which eliminates unnecessary costs in the installation and maintenance of the piping of the fire fighting equipment.

Hereinafter, with reference to the accompanying drawings illustrating the present invention with a specific example as follows.

2 is a schematic piping diagram showing the structure of a fire alarm composite alarm valve according to an embodiment of the present invention.

As shown, the combined fire alarm valve 20 according to an embodiment of the present invention, the pressure reducing means of the configuration as shown in Figure 2, the main valve 12 of the configuration similar to that shown in Figure 2, Pilot valve 14, ejector 16, and the like, in addition, it may include a limit switch assembly 22 as an alarm means interlocked with the operation of the main valve (12). Furthermore, according to embodiments of the present invention, various functions such as check valve 23 and / or relief pilot valve 24 may be configured with a more complex alarm.

As described with reference to FIG. 2, the main valve 12 is a valve for depressurizing relatively high pressure water, that is, supplied fire water, into fire water of relatively low pressure. Specifically, the main valve 12 has a primary inlet chamber 122 through which water at a supply pressure flows in, a secondary side outflow chamber 124 through which the high pressure water is decompressed, and an opening degree at which the primary side and the secondary side are connected. And a diaphragm chamber 126 for adjusting the position of the diaphragm for determining the size. The pressure reducing function of the main valve 12 may be determined by the size of the opening degree, and the size of the opening degree may be adjusted by the pressure of the water filled in the diaphragm chamber 126.

The ejector 16 preferably connects between the inlet chamber 122 via the strainer 18 and the diaphragm chamber 126 via the control valve 15, outside the main valve 12. The strainer 18 is a means for preventing foreign substances from flowing into the pipe connected to the ejector 16 having a relatively small diameter and the diaphragm chamber 126 from the inlet chamber 122. Ejector 16 is a device for controlling the flow of water between the inlet chamber 122 and the diaphragm chamber 126 in order to sense the pressure of the diaphragm chamber 126 to provide a decompression adjustment effect as described below. .

The pilot valve 14 is a small-diameter valve connecting the outlet chamber 124 and the diaphragm chamber 126 to the outside of the main valve 12 via the ejector 16. The pilot valve 14 serves to adjust the opening degree of the main valve 12 by sensing the pressure of the outflow chamber 124 to regulate the flow of water between the diaphragm chamber 126 and the outflow chamber 124. Means.

The alarm means may be a limit switch assembly 22 which is configured to operate when a linear movement made according to the size of the opening degree of the main valve 12 reaches a predetermined level. For example, the limit switch assembly 22 may include an axis that is linked to the movement of the diaphragm in the main valve 12 and a limit switch that operates when the axis moves by a predetermined level distance. If, for example, the sprinkler is operated by a sensor that senses smoke or flame or temperature according to a fire occurrence and the main valve 12 is completely opened, the limit switch assembly 22 which is linked thereto is operated as a result. The alarm device connected to the limit switch assembly 22 may then be activated and an alarm may be sounded or displayed to indicate that the fireman, ie water is being sprayed through the sprinkler, for example.

In general, such an alarm function is well known in the art, but according to the present invention, it has a unique feature of operating together with the structure of a conventional pressure reducing valve. Therefore, in the related art, the operation of the pressure reducing valve and the alarm valve was made and controlled at all, but according to the present invention, the operation of the pressure reducing valve and the operation of the alarm valve can be interlocked, thereby enabling a more reliable alarm function, and the system complexity. The advantage is that it can be reduced and facilitated installation and maintenance.

On the other hand, the pilot valve 14 is a small amount of water from the high pressure inlet chamber 122 even when the fire water is not used, even when the high pressure water is stagnated in the inlet chamber 122 and the main valve 12 is closed. The leakage to the outflow chamber 124 has a problem that eventually the pressure of the outflow chamber 124 is equal to the pressure of the inflow chamber 122. Therefore, in order to solve the leakage problem of the pilot valve 14, according to the present invention, it may further include a relief pilot valve 24 for connecting between the outlet chamber 124 and the outlet 25.

The relief pilot valve 24 is a small-diameter relief valve that senses the pressure in the outlet chamber 124 to drain a small amount of water from the outlet chamber 124 when the pressure is greater than a predetermined pressure, and consequently, the pressure in the outlet chamber 124. It is in charge of the function of lowering below a certain pressure. Accordingly, the relief pilot valve 24 can solve the leak problem of the pilot valve 14.

In the operation of the fire alarm composite alarm valve 10, when the pressure of the outlet chamber 124 is lower than the first predetermined pressure lower than the supply pressure, the ejector 16 and the pilot valve 14 is diaphragm A small amount of water from the chamber 126 flows out the outflow chamber 124 and acts to open the main valve 12 further. In addition, when the pressure of the outlet chamber 124 is higher than the predetermined first set pressure but lower than the predetermined second set pressure lower than the supply pressure, the ejector 16 and the pilot valve 14 are separated from the outlet chamber 124. A small amount of water flows from the diaphragm chamber 126 to act to close the main valve 12 further.

In this case, in order to prevent the fire water moving from the diaphragm chamber 126 to the outlet chamber 124 to pass through the ejector 16 to the inlet chamber 122, the ejector 16 and the inlet chamber ( The check valve 23 may be installed between the 122. In addition, the check valve 23 may also serve to prevent fire water moving from the outflow chamber 124 to the diaphragm chamber 126 to flow through the ejector 16 to the inflow chamber 122. .

Further, when the pressure of the outflow chamber 124 is higher than the preset second set pressure, the relief pilot valve 24 causes a small amount of water to be discharged from the outflow chamber 124 to the outlet 25, so that the outflow chamber The pressure of 124 is operated to fall below the second preset pressure.

Here, the preset second set pressure is preferably 0.2 to 0.5 kg / cm 2 higher than the preset first set pressure. In this case, the preset first predetermined pressure may be, for example, 12 kg / cm 2 (spring cooler) and 7 kg / cm 2 (before indoor fire extinguishing).

In addition, the outlet chamber 124 side may be connected via another drain 27 and the isolation ball valve 26. This drain 27 may be used to, for example, discharge water and air or gas remaining in accordance with a test after installing a facility.

According to the present invention, the pressure of the outlet chamber 124 is used by the pilot valve 14 and the relief pilot valve 24. In addition to this, a pressure gauge 28 for measuring the pressure of the inlet chamber 122 may be used. It may be connected to the inlet chamber 122 via an isolation ball valve, and a pressure gauge 29 for measuring the pressure of the diaphragm chamber 126 may be connected, for example, via a check valve. The pressure value thus measured may be used for further control.

The present invention has been described through specific embodiments, but various modifications are possible to those skilled in the art by referring to and combining various features described herein. Therefore, it should be pointed out that the scope of the present invention is not limited to the described embodiments, but should be interpreted by the appended claims.

As described above, the present invention can be widely used, for example, in the field of fire fighting valves installed in a fire water piping system for a sprinkler or a fire hydrant.

1 is a schematic piping diagram showing the structure of a firefighting piping system of a conventional high-rise building.

Figure 2 is a schematic piping diagram showing the structure of a conventional fire reducing pressure valve.

Figure 3 is a schematic piping diagram showing the structure of the composite fire alarm valve according to an embodiment of the present invention.

<Brief description of the major symbols in the drawings>

10: fire fighting pressure reducing valve 12: main valve

122: inlet chamber 124: outlet chamber

126: diaphragm chamber 14: pilot valve

16: ejector 18: strainer

20: fire alarm composite alarm valve 22: limit switch assembly

23: check valve 24: relief pilot valve

25: outlet 26: isolation ball valve

27: drain 28, 29: pressure gauge

Claims (6)

Including a primary side inlet chamber 122 into which water at a supply pressure flows, a secondary side outlet chamber 124 through which the high-pressure water flows out through an opening, and a diaphragm chamber 126 for adjusting the size of the opening. A predetermined first set pressure lower than the supply pressure and a second predetermined second higher than the predetermined first set pressure but lower than the supply pressure, the pressure of the fire water flowing through the main valve 12 and the outlet chamber 124 configured A combined fire alarm system comprising a pressure reducing means for reducing the pressure between the set pressure and the alarm means for outputting an alarm signal when the size of the opening degree of the main valve 12 reaches a predetermined level, The decompression means may include: an ejector 16 connecting the inflow chamber 122 and the diaphragm chamber 126 from the outside of the main valve 12; And a pilot valve 14 connecting the outlet chamber 124 and the diaphragm chamber 126 to the outside of the main valve 12 via the ejector 16. When the pressure of the chamber 124 is lower than the first set pressure, the ejector 16 and the pilot valve 14 are a small amount of water from the diaphragm chamber 126 to the outlet chamber 124 To flow out so that the opening degree of the main valve 12 becomes larger; On the other hand, when the pressure of the outlet chamber 124 is higher than the second set pressure, the ejector 16 and the pilot valve 14 allows a small amount of water to flow into the diaphragm chamber 126 to the main Configured to operate so that the opening degree of the valve 12 becomes smaller, In addition, the alarm means: a combined fire alarm valve, characterized in that the limit switch assembly 22 is configured to operate when the linear movement made according to the size of the opening degree of the main valve 12 reaches a predetermined level. According to claim 1, It further comprises a check valve 23 is installed between the ejector 16 and the inlet chamber 122 to block the fire water flowing back from the ejector 16 side to the inlet chamber 122 side Composite alarm valve for fire, characterized in that. The method of claim 1, further comprising a relief pilot valve 24 for connecting between the outlet chamber 124 and the outlet 25 communicated from the outlet chamber 124, When the pressure of the outlet chamber 124 is higher than the second set pressure, the relief pilot valve 20 causes a small amount of water to be discharged from the outlet chamber 124, so that the pressure of the outlet chamber 124 is reduced. And actuate to fall below the second set pressure. delete delete delete

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