JP2024046986A - Deluge valve unit and fire extinguishing equipment - Google Patents

Abstract

To provide a deluge valve unit capable of reducing an amount of piping and reducing a piping size and simply and safely opening/closing a valve, and fire extinguishing equipment including the deluge valve unit.SOLUTION: A deluge valve unit includes: a deluge valve supplying fire extinguishing liquid from a primary side piping to a secondary side piping; a first air valve provided for the secondary side piping; and a controller which closes the first air valve as an operator operates and drains the fire extinguishing liquid from the deluge valve to a test piping branched from the secondary side piping.SELECTED DRAWING: Figure 2

Description

The present invention relates to a simultaneous opening valve unit and a fire extinguishing system including the simultaneous opening valve unit.

The simultaneous release valve is installed in the piping of sprinkler systems, water spray fire extinguishing systems, foam fire extinguishing systems, and foam fire extinguishing systems for specific parking lots, and is used as a control valve that supplies water to all heads in areas required for fire extinguishing (for example, Patent Document 1: JP 2014-66304 A).
When inspecting such fire extinguishing equipment, the gate valve provided on the secondary side of the simultaneous release valve is closed and water is drained from the test piping. For this reason, the simultaneous release valve and the gate valve have conventionally been placed at a position (height) within the reach of an operator.

JP 2014-66304 A

By the way, by laying a loop pipe near the ceiling and providing a simultaneous release valve, it is expected that the amount of pipes and the size of the pipes can be reduced.
In this case, however, it is necessary to install a simultaneous release valve near the ceiling, and work at a high altitude is required to close the gate valve on the secondary side of the simultaneous release valve. Working at a high altitude is time-consuming and increases the risk of the work.

The present invention aims to provide a simultaneous opening valve unit that can reduce the amount and size of piping, and that can perform valve opening and closing operations easily and safely, and a fire extinguishing system that includes the simultaneous opening valve unit.

In order to solve the above-mentioned problems, the present invention provides:
A simultaneous release valve that supplies fire extinguishing liquid from the primary side piping to the secondary side piping;
a first air valve provided in the secondary side piping;
a control device that closes the first air valve in response to an operation by an operator and discharges the fire extinguishing liquid from the simultaneous release valve into a test pipe branching off from the secondary side pipe;
The present invention provides a simultaneous opening valve unit comprising:

In addition, it is preferable that the simultaneous opening valve unit of the present invention further includes a second air valve provided in the test piping, and that the control device closes the first air valve and opens the second air valve in response to the operation of the operator.

The present invention also provides a fire extinguishing system including any of the above-described simultaneous release valve units, in which the simultaneous release valve and the first air valve are disposed on the ceiling side of the facility in which the fire extinguishing system is installed.

According to the present invention, the first air valve arranged on the secondary side of the simultaneous release valve can be operated from the control device, so the simultaneous release valve and the first air valve can be arranged on the ceiling side of the facility where the fire extinguishing equipment is installed. Therefore, for example, by making the primary side piping into a loop piping and arranging it on the ceiling side, the amount of piping can be reduced and the piping size can be reduced, and the valve can be opened and closed easily and safely.

1 is a schematic diagram showing a configuration example of a fire extinguishing system 1 according to an embodiment of the present invention. 1 is a schematic diagram of the simultaneous release valve 5 and air valves 7 and 8. FIG.

Below, a representative embodiment of the simultaneous release valve unit and fire extinguishing equipment according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these drawings. In addition, since the drawings are intended to conceptually explain the present invention, the dimensions, ratios, and numbers may be exaggerated or simplified for ease of understanding.

The fire extinguishing system 1 is a system that uses a fire extinguishing liquid (e.g., fire extinguishing water, a foam solution, etc.) to extinguish a fire, and examples of such systems include sprinkler systems, water spray fire extinguishing systems, and foam fire extinguishing systems. The fire extinguishing system 1 is installed in facilities such as commercial facilities, schools, accommodation facilities, and multi-storey car parks.

As shown in FIG. 1, the fire extinguishing equipment 1 includes piping (primary piping 2 and secondary piping 3), a water discharge head 4, a simultaneous release valve 5, a test piping 6, air valves 7 and 8, a control device 9, and a gas cylinder 10. Here, the simultaneous release valve 5, the air valve 7, and the control device 9 constitute a simultaneous release valve unit. The simultaneous release valve unit may further include an air valve 8.

The piping connects a water source (not shown), such as a water supply, well, river, or sea, to the water-jet head 4, and supplies extinguishing liquid (e.g., extinguishing water) in the water source to the water-jet head 4 by a pump (not shown).
For ease of explanation, the upstream side of the simultaneous release valve 5 in the piping will be referred to as the primary side piping 2 , and the downstream side of the simultaneous release valve 5 will be referred to as the secondary side piping 3 .

Here, from the viewpoint of reducing the amount of piping, it is preferable that the primary side piping 2 forms a loop piping (see FIG. 1). In other words, it is preferable that the annular primary side piping 2 is radially branched and connected to the simultaneous release valve 5.
In this case, for example, while a single pipe would use 125A, a smaller diameter 100A can be used for the loop pipe as the size of the primary pipe 2, and the pipe friction loss value can be kept at the same level. That is, while the inner diameter of a 125A pipe is 130.8 mm, in the case of a loop pipe, there are two 100A pipes (inner diameter 105.3 mm) up to the section (total inner diameter 210.6 mm), and the total inner diameter of the pipes can be increased, thereby reducing the pipe friction loss value.
In addition, it is preferable that the loop piping portion of the primary side piping 2 is arranged on the ceiling side of the facility in which the fire extinguishing equipment 1 is installed. By running the main piping around the ceiling, it becomes possible to take out the piping to the compartment from the nearest loop portion, and the amount of piping is reduced. In addition, by installing the simultaneous release valve 5 on the ceiling side, the amount of piping material is reduced, and it is expected that the installation cost will be reduced.

Multiple water-discharge heads 4 are attached to the secondary piping 3. In this embodiment, the secondary piping 3 is preferably arranged on the ceiling side of the facility in which the fire extinguishing equipment 1 is installed. Here, the ceiling side refers to a high place where a worker cannot work without a workbench or work vehicle, such as the ceiling or near the ceiling.

A simultaneous release valve 5 is provided between the primary side pipe 2 and the secondary side pipe 3. The simultaneous release valve 5 normally closes the area between the primary side pipe 2 and the secondary side pipe 3, and opens it when a fire occurs. The simultaneous release valve 5 may be any type of simultaneous release valve, including pressurized, depressurized, motorized, or electromagnetic. In this embodiment, the simultaneous release valve 5 is also preferably located on the ceiling side of the facility in which the fire extinguishing equipment 1 is installed.

An air valve 7 (first air valve) is installed in the secondary piping 3. The air valve 7 is, for example, a pneumatically automatically operated valve, and the opening and closing of a valve body is operated by compressed gas.
The air valve 7 may be composed of, for example, a valve body such as a ball valve or a butterfly valve, and an actuator designed to rotate the drive shaft of the valve by 90°. The actuator slides a piston from a first position to a second position (or from the second position to the first position) in response to the supply of compressed air to either of two ports, thereby rotating the drive shaft (and the valve body) (double acting type).
Therefore, by connecting the air valve 7 to a compressed air pipe, it is possible to easily automatically operate the air valve 7 and centrally manage the entire opening and closing process of the air valve 7. Such pneumatic operation is advantageous in terms of energy saving, and is safer than electric or hydraulic operation.

A test pipe 6 branches off from the upstream side of the air valve 7 in the secondary pipe 3. The test pipe 6 is used to test whether the fire extinguishing equipment starts up correctly. During the test, the extinguishing liquid flowing out from the simultaneous release valve 5 flows through the test pipe 6, but does not flow into the water-discharge head 4.
An air valve 8 (second air valve) is installed in the test pipe 6. As the air valve 8, the same type as the air valve 7 can be used.

The air valves 7 and 8 are each connected to a gas cylinder 10 via an air pipe 11 and are controlled by a control device 9. For example, if the control device 9 is an automatic pneumatic valve operation panel, the control device 9 opens and closes a solenoid valve (not shown) provided on the air pipe 11 in response to an operator's operation of the base, thereby operating the air valves 7 and 8 by sending compressed gas from the gas cylinder 10 to the air valves 7 and 8.

Therefore, during normal operation, the control device 9 opens air valve 7 and closes air valve 8, so that even if water is sprayed from the water-jetting head 4 in the event of a fire, water will not flow into the test piping 6. During inspection, the control device 9 closes air valve 7 and opens air valve 8, so that water is not sprayed from the water-jetting head 4 and the extinguishing liquid is guided from the test piping 6 to the water flow test device (not shown).
The control device 9 can display the open/closed status of the air valves 7, 8.

The gas cylinder 10 may be, for example, a nitrogen gas cylinder, and may be operated with a capacity of, for example, 3 to 4 L and a pressure of 0.1 to 1.0 MPa.

Next, the operation of the fire extinguishing system 1 will be described.
During normal operation, air valve 7 is open and air valve 8 is closed.
When a fire breaks out, a pump (not shown) starts to supply extinguishing liquid to the primary piping 2. At the same time, the simultaneous release valve 5 opens to guide the extinguishing liquid from the secondary piping 3 to the water-discharge head 4, from which the liquid is sprayed. At this time, the extinguishing liquid does not flow into the test piping 6.

During inspection, the control device 9 closes the air valve 7 and opens the air valve 8 by supplying compressed gas from the gas cylinder 10 to the air valves 7 and 8. This allows inspection to be performed by directing water from the test pipe 6 to the water flow test device (not shown) without discharging water from the water-discharging head 4.

In particular, by making the primary piping 2 of the fire extinguishing equipment 1 into a loop piping, providing a simultaneous release valve 5 on the ceiling side of the facility where the fire extinguishing equipment 1 is installed, and providing automatic valves (air valves 7, 8) on the secondary side of the simultaneous release valve 5, the air valves 7, 8 can be closed or opened all at once. Since many simultaneous release valves 5 are installed in a facility of a certain size, the fire extinguishing equipment 1 of this embodiment significantly reduces the time required to close or open many air valves 7, 8 compared to the conventional method of closing the secondary valves of the simultaneous release valve one by one during inspection.

In addition, in this embodiment, the air valves 7, 8 located near the ceiling can be opened and closed from the ground by operating the control device 9. This eliminates the need for dangerous work at high altitudes, such as work using a high-altitude work vehicle, making the system safer.

In addition, by making the primary side piping 2 into a loop piping and placing a simultaneous release valve 5 etc. on the ceiling side, it is possible to shorten the length of the primary side piping 2 and reduce the pipe diameter, which leads to reduced installation costs.

The above describes typical embodiments of the present invention, but the present invention is not limited to these, and various design modifications are possible, which are also included in the present invention.

REFERENCE SIGNS LIST 1 Fire extinguishing equipment 2 Primary piping 3 Secondary piping 4 Water discharge head 5 Simultaneous release valve 6 Test piping 7, 8 Air valve 9 Control device 10 Gas cylinder

Claims (3)

A simultaneous release valve that supplies fire extinguishing liquid from the primary side piping to the secondary side piping;
a first air valve provided in the secondary side piping;
a control device that closes the first air valve in response to an operation by an operator and discharges the fire extinguishing liquid from the simultaneous release valve into a test pipe branching off from the secondary side pipe;
A simultaneous opening valve unit comprising: Further comprising a second air valve provided in the test piping;
the control device closes the first air valve and opens the second air valve in response to an operation by the operator;
The simultaneous opening valve unit according to claim 1 . A fire extinguishing system including the simultaneous opening valve unit according to claim 1,
A fire extinguishing system, wherein the simultaneous release valve and the first air valve are arranged on the ceiling side of a facility in which the fire extinguishing system is installed.