JPH0369732A - Water feeder in both upper direction and lower direction - Google Patents

Abstract

PURPOSE:To enable water to be fed even at the time of service interruption and the fault of a pump by penetrating a building vertically with a cistern on a low-story section and an elevated water tank on a roof section, and by connecting them to a feed water vertical-pipe via a stack pipe projected from the roof. CONSTITUTION:On the lower floor and roof of a building A, a cistern 1 and an elevated water tank 2 are arranged respectively, and a feed water vertical- pipe 3 is set to penetrate the respective floors of the building A with. After that, to the apex section of the feed water vertical-pipe 3, a stack pipe 4 is extended, and the tip of the stack pipe 4 is released into the elevated water tank 2. After that, between the cistern and the feed water vertical-pipe 3, a storage pump 5 is placed, and on the jet port of the pump 5 connected to the feed water vertical-pipe 3, a check valve 6 is fitted. Then, an apex section feed water pipe 8 with a check valve 7 placed is connected between the bottom section of the elevated water tank 2 and the stack pipe 4. Besides, water taps 9 on the respective floors are connected to the feed water vertical-pipe 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bidirectional water supply device for buildings with three or more floors, such as offices and apartment buildings.

(Prior Art) Conventionally, in buildings with two floors or less, water is generally supplied to each floor by a direct connection to a water main.

Typical water supply systems for buildings with three or more floors are i) downward water supply system (elevated water tank type, gravity type) and 11) upward water supply system (pressure tank type, pressurized type).

In the former case, as shown in Figure 3, there is a water tank (a) on the lower level.
) and a lift pump (b) connected to the water receiving tank (a), an elevated water tank (C) is installed on the roof, and an elevated water tank (C) is installed on the discharge side of the pump (b). A lift pipe (e) connected to the water tank and equipped with a check valve (d) is connected to the elevated water tank (C), and a vertical water supply pipe (f) is connected to the bottom of the elevated water tank (C). If the water level of C) is low, the pump (
b) supplies water to the elevated water tank (C) via the lift pipe (e).

When the water level in the water tank (C) rises, the pump (b) stops and gravity moves the water from the elevated water tank (C) to the water supply pipe (f).
) Water is supplied to faucets (g)i on each floor.

The check valve (d) is open when the pump (b) is in operation and closed when the pump (b) is stopped, thereby preventing water from falling into the pump pipe (e). In the latter case, as shown in Figure 4, a water tank (b), a pressure pump (i), and a pressure tank (j) are installed on the lower level, and are connected to pressure tank 0) and pressure tank (j), and the upper end is the water supply pipe <e> connected to the air chamber (k)
The inside of the building will be pressurized at a constant level, and water will be supplied from the water supply pipe (1) to the faucets (e) on each floor. When the water pressure in the pipes falls below a certain level, the pump (i) is activated and water is supplied to each floor via the water supply pipe (i) at pressure (j).

(Problem to be solved by the invention) However, the former requires two main vertical pipes, a lift pipe and a water supply pipe, and lacks ease of construction and maintenance.
The space for the pipe shaft becomes large. In addition, all the water used in the building is pumped onto the roof before use.
It becomes a waste of energy.

In the latter case, water cannot be supplied during a power outage, breakdown, or maintenance, and water hammer prevention measures such as the air chamber described above are required. In addition, the capacity of the water tank is larger than that of the elevated water tank, and pressure control is required to install a pressure tank, which increases equipment costs and complicates maintenance.

As described above, the conventional device increases initial costs, maintenance costs, and running costs.

The present invention was proposed in view of the problems of the prior art, and it is possible to supply water even in the event of a power outage or pump failure, has a single main vertical pipe, simplifies the configuration, and pumps water to an elevated water tank. Another object of the present invention is to provide a bidirectional water supply device that can supply water to each floor.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the vertical water supply device according to the present invention includes a water receiving tank and an elevated water tank installed in a low-rise area and a rooftop area, respectively, and a water tank that extends vertically through a building. , and a water supply vertical pipe connected to the elevated water tank via a top pipe protruding from the rooftop, a water pump interposed between the water supply vertical pipe and the water receiving tank, and a bottom part of the elevated water tank and the water supply. a top water supply pipe connected between the vertical pipe, and a check valve for blocking the water supply pipe when the pump is stopped is interposed on the discharge side of the water pump; A check valve is interposed to close the pipeline while the pump is in operation.

(Function) Since the present invention is configured as described above, when water is used on each floor and the water level in the elevated water tank falls below a certain water level, the water pump is started and the water in the water tank is pumped into the water supply shaft. Water is pumped up to an elevated water tank via pipes and an extension, and during this time water can be used on each floor via the water supply vertical pipe.

At this time, the check valve of the top water supply pipe connected to the bottom of the elevated water tank is closed to prevent water from flowing back into the elevated water tank.

When the water is pumped up by the pump and the water level in the elevated water tank reaches a high level, the pump stops, and water is supplied from the elevated water tank by gravity to the water supply pipe via the top water supply pipe, and from the same water supply pipe to each floor. Water is supplied.

At this time, the check valve on the discharge side of the water pump closes to prevent backflow into the water tank, water from falling into the water supply pipe, and air from entering.

(Example) The present invention will be described below with reference to the illustrated embodiments.

A water tank (1) and an elevated water tank (2) are installed on the lower floors and the roof of the building (4), respectively, and a water supply pipe (3) is installed through each floor of the building (4). A top pipe (4) extending above the rooftop is installed at the top of the pipe (3), and the tip of the top pipe (4) is open into the elevated water tank (2).

A pump (5) is interposed between the water receiving tank (1) and the water supply vertical pipe (3), and a check valve (6) is installed at the discharge port of the pump (5) connected to the water supply vertical pipe (3). is interposed.

Between the bottom of the elevated water tank (2) and the top tube (4),
A top water supply pipe (8) equipped with a check valve (7) is connected.

In the figure, (9) is a faucet that is installed on each floor and connected to the vertical water supply pipe (3).

Since the illustrated embodiment is configured as described above, water is used on each floor, and when the water level in the elevated water tank (2) drops below a predetermined water level, the water pump (5) is activated to supply water. Water is pumped up through a vertical pipe (3) and stored in an elevated water tank (2) through an elongated pipe (4). On the other hand, water is supplied from the water supply pipe (3) to the faucets (9) on each floor, making it possible to use water on each floor.

At this time, the check valve (7) of the top water supply pipe (8) connected to the lower part of the elevated water tank (2) is closed, and the elevated water tank (2)
Backflow into the body is prevented. (See Figure 1) Water is pumped up by the water pump (5), and when the elevated water tank (2) reaches a high water level and exceeds a predetermined water level, the water pump (5) stops and the water in the elevated water tank (2) is pumped by gravity. The top water supply pipe (8) and vertical water supply pipe (3) are dropped to supply water to each water stop valve (9). (See Figure 2) At this time, the check valve (6) on the discharge side of the water pump (5) is closed, preventing backflow to the water tank (1), water falling into the water supply pipe (3), and air contamination. Prevented.

Note that pressure fluctuations can be further suppressed by detecting the water pressure in the water supply vertical pipe (3) with a sensor and controlling the water pump (5) with an inverter or the like.

The present invention is applicable not only to buildings with three or more floors, but also to one-story buildings with high floor heights, such as factories.

(Effects of the Invention) According to the present invention, as described above, the water receiving tanks and the elevated water tanks installed in the low-rise area and the rooftop area are connected vertically through the building, and the top pipe protruding from the rooftop is connected to the upper end. Water is stored in the elevated water tank using a pump interposed between the water supply pipe and the water receiving tank, and during this time, water is supplied to each floor from the water supply pipe. Also, when the water level of the elevated water tank reaches a high level, the water pump is stopped, and water is supplied by gravity from the elevated water tank to the top water supply pipe and water supply vertical pipe connected to the bottom of the elevated water tank, and water is supplied to each floor from the water supply vertical pipe. In this way, water was supplied to both the top and bottom.
The lift pipe and water supply pipe are served by a single pipe, which improves ease of construction and maintenance and saves shaft space.

Furthermore, according to the present invention, water is directly supplied while the water pump is in operation, resulting in effective energy-saving operation and reduced running costs.

Furthermore, even during power outages, failures, and maintenance, water can be supplied as long as residual water is secured in the elevated water tank.

Furthermore, since the elongated top pipe at the upper end of the water supply vertical pipe is opened into the elevated water tank and communicates with atmospheric pressure, water hammer pressure is released, preventing water hammer and alleviating pressure fluctuations.

Furthermore, according to the present invention, installation of a pressure tank and pressure control are not necessary, and initial costs and maintenance fees are reduced.

In addition, a check valve installed on the discharge side of the water pump prevents backflow into the water tank, and a check valve installed in the top water supply pipe ensures that water always flows from top to bottom. , stagnant water or dead water is prevented.

[Brief explanation of drawings]

FIGS. 1 and 2 are longitudinal cross-sectional views, respectively, showing the state in which the water pump is stopped in the tray during operation in an embodiment of the vertical water supply device according to the present invention, and FIGS. 3 and 4 are respectively the conventional It is a longitudinal cross-sectional view showing a downward water supply device as well as an upward water supply device. (1)...Water tank, (2)...Elevated water tank, (3)...Water supply vertical pipe, (4)...Top pipe, (5)...Lifting pump, (6) ... Check valve, (7) ... Check valve, (8) ... Top water supply pipe. The first calm, the second circle

Claims (1)

[Claims] A water receiving tank and an elevated water tank installed in the lower floors and the rooftop, respectively, a water supply vertical pipe that runs through the building and is connected to the elevated water tank via a top pipe that protrudes from the rooftop, and the water supply vertical pipe. It consists of a water pump interposed between the pipe and the water receiving tank, and a top water supply pipe connected between the bottom of the elevated water tank and the water supply vertical pipe, and the pump stop on the discharge side of the water pump. A check valve for blocking the water supply pipe is installed in the pump, and a check valve for blocking the water supply pipe is installed in the top water supply pipe during operation of the pump. Water supply device.