JP4008461B2 - Piping equipment - Google Patents

Description

  The present invention relates to a sprinkler piping facility which is disposed on each floor of a building such as a condominium or an office building and used to prevent the spread of fire due to watering.

  As shown in FIG. 2, a loop pipe 1 is arranged on each floor of a building such as an apartment, and branch pipes 2 are provided from the loop pipe 1 to each room, and a sprinkler head 3 is connected to the branch pipes 2. A sprinkler piping facility in which a base end portion 4 of the loop piping 1 is connected to a water supply pipe 5 passing through the building via an automatic alarm valve 6 has been known.

  When a fire breaks out in a room, the sprinkler head 3 operates and sprinkles water. At this time, the sprinkler head 3 mainly passes through the flow path in the shorter loop pipe 1 between the sprinkler head 3 and the water pipe 5 to send water. Water is sent from the water pipe 5 to the sprinkler head 3, and the automatic alarm valve 6 is actuated by detecting the water supply and transmits an alarm to the management room or the like.

  Then, it is periodically inspected whether or not the operation as described above is normally performed for all the sprinkler heads 3 on the floor. For this periodic inspection, in the conventional sprinkler piping equipment of the loop piping system, the terminal branch pipe 2a for feeding water to the sprinkler head 3a having the worst water feeding condition, that is, the sprinkler head 3a located farthest from the water feeding pipe 5. One end of the end test valve pipe 7a is connected to the other end of the end test valve pipe 7a, and the end test valve apparatus 8 is connected to the other end of the end test valve pipe 7a. It is connected to the drain pipe 9.

  The terminal test valve device 8 is configured to allow water to flow out in the same manner as when the sprinkler head 3 is operated. By operating the terminal test valve device 8, the sprinkler head 3 is not sprinkled. Even under the condition, it can be determined whether or not the sprinkler piping equipment is in a normal state based on whether or not the alarm operation of the automatic alarm valve is normally performed.

  In buildings such as condominiums and office buildings, the water supply pipe and the drain pipe are often arranged side by side at positions close to each other so as to pass through the building. This is because it is required to arrange the piping in a common place in the building. For this reason, in the above conventional example, as shown in FIG. 2, the start point of the terminal test valve pipe 7 a is the fastest position from the water supply pipe 5 and the drain pipe 9, and the end point is a position close to the drain pipe 9. The terminal test valve pipe 7a had to be provided over a long distance. Since the end test valve pipe 7a is long, it is necessary to increase the pipe diameter to prevent an increase in the flow resistance.

  As described above, in the conventional technology using loop piping, the end test valve piping provided for checking whether the sprinkler piping equipment is normal or not by checking the operation of the automatic alarm valve is long and has a pipe diameter. However, there is a problem in that the cost of the piping itself is increased, and the construction for routing the terminal test valve piping for a long distance is required, resulting in an increase in the construction cost.

  An object of this invention is to provide the piping equipment which can eliminate the problem of the said prior art.

  In order to solve the problems of the conventional example described above, the present invention provides a loop pipe on each floor of a building such as an apartment, a branch pipe is provided in each room from the loop pipe, and a sprinkler head is connected to the branch pipe. In a piping facility in which a base end portion of the loop pipe is connected to a water pipe passing through the building via an automatic alarm valve, and a drain pipe penetrating the building is disposed at a position near the water pipe. A maintenance on-off valve is provided in the vicinity of the base end of the loop pipe to restrict the flow direction of the water supply from the water supply pipe to be one direction in the loop pipe when the valve is closed. One end of the end test valve pipe is connected to the branch pipe for the sprinkler head at the most downstream position in the loop pipe when the valve is closed, and the other end of the end test valve pipe is connected to the other end of the end test valve pipe. Connect the valve device, and wherein the drainage portion of the terminal test valve device is connected to the drain pipe.

  According to the present invention, the branch pipe connected to the terminal test valve pipe is closed by closing the maintenance on-off valve at the time of periodic inspection to determine whether or not the sprinkler installation equipment is normal by checking the operation of the automatic alarm valve. The sprinkler head can be placed at the most downstream position in the loop piping or in the vicinity thereof, and water feeding experiments corresponding to the sprinkler head with the worst water feeding conditions can be conducted. Experiments along can be performed. According to the present invention, since the terminal test valve pipe can be disposed near the maintenance on-off valve and eventually the drain pipe, its length is shortened and its diameter is small. It is possible to simplify the piping work for the terminal test valve piping.

  Therefore, according to the present invention, in the sprinkler piping facility using the loop piping, there is an effect that the facility for the periodic inspection can be constructed at a low cost.

  An embodiment of the present invention will be described with reference to FIG.

  In FIG. 1, 1 is a loop pipe, 2 is a branch pipe, 3 is a sprinkler head, 4 is a base end portion of the loop pipe 1, 5 is a water supply pipe, 6 is an automatic alarm valve, 8 is a terminal test valve device, and 9 is drainage. These tubes are equivalent to those described in the conventional example of FIG.

  In the present embodiment, a maintenance on-off valve 10 is disposed in the vicinity of one side of the base end portion 4 of the loop pipe 1. This maintenance on-off valve 10 is configured to manually open and close the valve, and is closed only during the periodic inspection. When the valve is normally opened, the water supply from the water supply pipe 6 is divided from the base end portion 4 in the vertical direction of the figure and sent to the sprinkler heads 3. When the maintenance on-off valve 10 is closed, the water supply from the water supply pipe 6 is sent from the base end portion 4 only in the upward direction in the figure, and reaches each sprinkler head through the counterclockwise flow path in the figure. . Therefore, the branch pipe shown by 2b and the sprinkler head shown by 3b in the figure are positioned at the most downstream position in the loop pipe when the maintenance on-off valve 10 is closed in the loop pipe 1.

  The end of the branch pipe 2b and the end test valve device 8 connected near the drain pipe 9 are communicated with each other by a terminal test valve pipe 7b. The branch pipe 2b is disposed at a location close to the maintenance on-off valve 10 and thus the drain pipe 9, and the terminal test valve device 8 is also disposed at a position close to the drain pipe 9. The terminal test valve pipe 7b connecting the two 2b and 8 can be short and have a small pipe diameter.

  The periodic inspection is performed with the maintenance on-off valve 10 closed, and when the terminal test valve device 8 is operated (opened), the water from the water supply pipe 5 enters the loop pipe 1 from the base end 4. It flows in, loops around the loop pipe 1 almost, reaches the branch pipe 2b, then flows into the end test valve device 8 through the end test valve pipe 7b, and enters the drain pipe 9 from the drainage portion 8a. Discharged.

  By this periodic inspection, a water supply experiment corresponding to the sprinkler head 3b having the worst water supply conditions can be performed. When the sprinkler piping facility is functioning normally, an automatic alarm valve that operates by detecting the water supply state This can be confirmed by 6 alarms.

The block diagram which shows the sprinkler piping equipment which concerns on embodiment of this invention. The block diagram which shows the sprinkler piping installation which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loop piping 2, 2b Branch pipe 3, 3b Sprinkler head 4 Base location 5 Water supply pipe 6 Automatic alarm valve 7b Terminal test valve piping 8 Terminal test valve apparatus 8a Drain part 9 Drain pipe 10 Maintenance on-off valve

Claims (1)

Loop piping is installed on each floor of a building such as a condominium, branch pipes are provided in each room from the loop piping, sprinkler heads are connected to these branch pipes, and the base end portion of the loop pipe passes through the building. In a piping facility that is connected to a water pipe through an automatic alarm valve, and a drain pipe that passes through the building is disposed near the water pipe,
A maintenance on-off valve is provided in the vicinity of the base end of the loop pipe to restrict the flow direction of the water supply from the water supply pipe to be one direction in the loop pipe when the valve is closed. One end of the end test valve pipe is connected to the branch pipe for the sprinkler head at the most downstream position in the loop pipe when the valve is closed, and the end test valve device is connected to the other end of the end test valve pipe. A piping facility characterized in that the drainage part of the terminal test valve device is connected to the drainage pipe.

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