JP2001164606A - Piping device of water supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the connection and disconnection between a piping unit and a pump of a direct coupled water supply booster pump device. SOLUTION: The row of three-way valves connected to the suction port of a pump and the row of three-way valves connected to the delivery port of the pump are disposed on a same plane parallel with each other, and the three-way valves on the suction port side and delivery port side of the same pump are allowed to rotate simultaneously about a same axis so that the valves can be switched simultaneously by the operation of a same handle. The row of the three-way valves on the suction side and the row of the three-way valves on the delivery side communicate with each other through communication pipes, respectively, and the communication pipes in the row of the suction side three-way valves is connected to the communication pipes in the row of the delivery side three-way valves through bridging pipes where a check valve allowing fluid to flow only from the suction side to the delivery side is installed. The row of the suction side three-way valves and the row of the delivery side three- way valves connected to each other through the pumps, communication pipes, and bridging pipes with check valve are used as one unit to form a piping unit. The piping unit and the suction and delivery ports of the pumps on the same plane are connected to the suction port side opening and delivery port side opening in the upper end part of the three-way valve piping unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection between a piping device including a control valve and a pump in a piping device of a water supply device.

[0002]

2. Description of the Related Art Conventionally, in a demand destination that consumes a large amount of clean water such as a commercial building, an apartment house, etc., directly from a water supply pipe.
Or, a direct feed water booster pump type water supply device that sends a boosted pressure to a demand destination by a small pump has been widely used. In this case, in order to reliably prevent the water of the supply destination from flowing back into the water distribution pipe, a backflow prevention device including a combination of the first and second check valves and a relief valve is provided on the suction side or the discharge side of the pump. Is required. In such a water supply apparatus piping, it is common to arrange a plurality of pumps in parallel so as to prevent water supply stoppage due to a pump failure or the like. Such a water supply device can send fresh water to a demand destination and can effectively use the pressure in the water distribution pipe, so that the power of the pump can be saved.When the amount of water used at night is small, the pump is stopped and the water distribution pipe is stopped. The water pressure in the distribution pipe is sent directly to the demand destination by utilizing the water pressure of the water, contributing to energy saving.

[0003]

In such a water supply device, a control valve for suction and discharge to each pump, a backflow prevention device and a pressure tank are provided between a water supply pipe and a water supply pipe to a demand destination. How it is arranged affects the space savings, especially in narrow indoor or basement rooms. In addition, it is necessary to remove or relocate the pump from the piping system as necessary.In such a case, it is important to determine whether the connection between the piping and the pump or the removal of the pump from the piping can be easily performed. This is a plumbing issue.

[0004]

According to the present invention, a row of three-way valves connected to a suction port of a pump and a row of three-way valves connected to a discharge port of a pump are arranged in parallel on the same plane. The three-way valves on the suction port side and the discharge port side of the same pump can be simultaneously rotated by the same shaft so that the valves can be simultaneously switched by operating the same handle, and the rows of suction-side three-way valves and the discharge side The three-way valve rows are respectively connected by communication pipes, and a check is made between the suction-side three-way valve row communication pipes and the discharge-side three-way valve row communication pipes only from the suction side to the discharge side while communicating with the communication pipes. Connected by a bridge pipe provided with a valve, these communication pipes, a row of suction-side three-way valves and a row of discharge-side three-way valves connected by a cross-linking pipe with a check valve, etc., as one unit,
In a piping device of a water supply device in which a plurality of pumps are connected on this unit, a suction port and a discharge port of each pump are on the same plane, and a suction port side opening of an upper end portion of each three-way valve piping unit. And a discharge port side opening.

[0005] The suction port and the discharge port of each pump are on the same plane, and the suction port side opening and the discharge port at the upper end of each three-way valve are provided via O-ring grooves and O-rings provided on the respective surfaces. To be connected to the side opening. Further, instead of the O-ring, the suction port and the discharge port of each pump are on the same plane, and the suction port side opening and the discharge port side of the upper end of each three-way valve are interposed via a gasket sandwiched between the respective faces. It can be connected to the opening. In the direct water supply booster pump device configured as described above, a water supply pipe is connected to one end of the suction-side three-way valve train via the backflow preventer, and the other end of the discharge-side three-way valve train is connected to the demand destination. It communicates with the piping connection port. In this case, the pressure tank is arranged to communicate with one end of the discharge-side three-way valve train.

[0006] In a place where a water supply device including such a direct water supply booster pump device is installed, a connection port to a water supply pipe and a pipe connection port of a demand destination may be located on the right or left side. In addition, the backflow preventer is provided in the middle of the suction port side of the pump when the water supply pressure of the water supply pipe is higher than the resistance of the backflow preventer, but there is no problem. In some cases, water may not flow after the backflow preventer. Therefore, in such a case, the unit connects the right end or the left end of the suction-side three-way valve train directly to the water supply pipe, and connects the other end of the discharge-side three-way valve train with the pipe connection port of the demand destination. A backflow arrestor will be placed in between. In this case, the pressure tank is disposed at one end of the discharge-side three-way valve train, or between one end of the discharge-side three-way valve train and the demand destination pipe connection port.

As described above, in the direct feed water booster pump, the suction port and the discharge port of each pump are on the same plane, and the suction port side opening and the discharge port side opening at the upper end of each three-way valve piping unit. Since the pump is connected to the pump, if a problem such as a failure of the pump occurs, the pump can be quickly attached to and detached from the piping for inspection and repair.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As one embodiment of the present invention, FIG. 1 shows a unit arrangement in which two pumps are arranged in parallel. The rows of the three-way valves 3 and 4 connected to the respective suction ports of the pumps 1 and 2 and the rows of the three-way valves 5 and 6 connected to the discharge ports of the pumps 1 and 2 are arranged on the same plane. Three-way valves 3 on the suction port side and the discharge port side of the same pump.
, 5, 4, and 6 can be simultaneously rotated by the same rotating shafts 9 and 10, respectively, so that the valves can be switched by operating the same handle 7, 8.

The rows of the inlet-side three-way valves 3 and 4 and the rows of the outlet-side three-way valves 5 and 6 are communicated by communicating pipes 11 and 12, respectively.
The communication pipes 12 in the row of the three-way valves on the discharge port side are connected by a bridge pipe 14 provided with a check valve 13 that flows only from the suction port side to the discharge port side. One end of the three-way valve 3 on the suction port side of the piping unit 15 of the pumps 1 and 2 thus formed is connected to the connection port 1 of the water supply pipe via the backflow preventer 16.
7, and the other end of the discharge port side three-way valve 6 is connected to a pipe connection port 18 of a demand destination. Further, a pressure tank 19 can be arranged to communicate with one end of the discharge port side three-way valve 5.

As shown in FIGS. 2 and 3, the suction port 20 of the pump 2 is connected to a suction port opening 21 at the upper end of the three-way valve 4 on the suction port side of the piping unit 15.
Are connected to a discharge port side opening 23 at the upper end of the discharge side three-way valve 6 of the piping unit 15, and their connection surfaces are on the same plane 24. For this reason, when the pump 2 is attached to or removed from the piping unit 15, the suction port 20 and the discharge port 21 of the pump 2 are simultaneously placed on the piping unit 15, and
5, the pump 2 can be removed from the piping unit 15. This operation is particularly necessary when the pump device is placed in a narrow space, or when the pump, piping unit, backflow prevention device, pressure tank, etc. are installed as a set in the cabinet, and only the pump is removed from the narrow cabinet. It is convenient to exchange. The above description is the same for the pump 1.

The suction port 20 of the pump 2 and the piping unit 1
As shown in FIG. 2, a normal type O-ring groove 25 is provided around the suction side opening 21 at the upper end of the suction side three-way valve 4 for connecting the pump to the piping unit. Insert the ring 26. Instead of the O-ring, a normal gasket 27 can be laid between the pump suction port and the suction port side opening of the piping unit as shown in FIG. The above description also applies to the discharge port of the pump 2 and the pump 1.

[0012]

The present invention is configured as described above.
Taking into account various conditions such as the location of the water supply pipe and the pipe connection to the customer, the water supply pressure of the water pipe, and the water supply pressure to the customer, the connection of the water supply pipe to the customer and the pipe to the demand The present invention provides a combination of a piping unit and a pump capable of easily performing piping of a most directly connected feed water booster pump since the positions of a connection port, a backflow prevention device, and a connection portion of a pressure tank can be easily changed. In particular, the suction port and discharge port of each pump are connected to the suction port side opening and discharge port side opening at the upper end of each three-way valve piping unit on the same plane, so installation work on site is easy. During operation, even if one pump fails, a backup operation is performed by another pump, during which the failed pump can be removed and repaired or replaced.

[Brief description of the drawings]

FIG. 1 is a sketch drawing of a direct feed water booster pump in which a three-way valve piping unit and a pump of the present invention are combined.

FIG. 2 is a partial sectional view showing a state where an O-ring groove and an O-ring are arranged between a pump suction port and a suction port side opening of a piping unit.

FIG. 3 is a partial cross-sectional view showing a state where a gasket is laid between a pump suction port and a suction port side opening of a piping unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump 1 2 Pump 2 3 Three-way valve on the inlet side of pump 1 4 Three-way valve on the inlet side of pump 2 5 Three-way valve on the outlet side of pump 1 6 Three-way valve on the outlet side of pump 2 7 Handle 1 8 Handle 2 9 Rotating shaft 1 10 Rotating shaft 2 11, 12 Connecting pipe 13 Check valve 14 Cross-linking pipe 15 Piping unit 16 Backflow prevention device 17 Connection to water supply pipe 18 Pipe connection to demand 19 Pressure tank 20 suction port 21 suction port side opening 22 discharge port 23 discharge port side opening 24 plane 25 O-ring groove 26 O-ring 27 gasket

Continued on the front page F term (reference) 3H044 AA01 BB08 CC14 CC15 DD10 DD11 DD12 DD13 DD24 DD27 DD28 3H067 AA12 AA23 AA32 BB02 BB14 CC33 DD03 DD14 DD24 EA02 EC09 EC22 EC25 EC27 FF12 FF17 GG13 3H071 AA01 CC13 DD13 DD35 DD32 DD35 DD37 DD38

Claims (3)

[Claims] A row of three-way valves connected to a suction port of a pump and a row of three-way valves connected to a discharge port of the pump are arranged in parallel on the same plane, and the suction port of the same pump is provided. The three-way valves on the side and the outlet side can be simultaneously rotated by the same shaft so that the valves are simultaneously switched by operating the same handle, and the row of the three-way valves on the pump inlet side and the three-way valve on the pump outlet side Each of the rows is connected by a communication pipe, and a check is made such that only the suction port side and the discharge port side flow between the communication pipe of the suction port side three-way valve row and the communication pipe of the discharge port side three-way valve row. A row of a three-way valve on the suction port side and a row of a three-way valve on the discharge port side connected by a bridge pipe provided with a valve, and these communication pipes, a bridge pipe with a check valve, etc. A water supply system that connects multiple pumps on a piping unit Wherein the suction port and the discharge port of each pump are connected to the suction port side opening and the discharge port side opening at the upper end of each three-way valve piping unit on the same plane. Equipment plumbing equipment 2. The suction port and the discharge port of each pump are on the same plane, and the suction port side opening of each three-way valve piping unit and the discharge port are connected via O-ring grooves and O-rings provided on the respective surfaces. The piping device of the water supply device according to claim 1, wherein the piping device is connected to the outlet side opening. 3. A suction port and a discharge port of each pump are connected to a suction port side opening and a discharge port side opening of each three-way valve piping unit via a gasket sandwiched between the respective faces on the same plane. The piping device of the water supply device according to claim 1, wherein