JP4434392B2 - Plumbing equipment for water supply equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a piping device of a water supply device such as a direct connection water booster pump provided with a plurality of pumps in parallel.
[0002]
[Prior art]
Conventionally, in demand destinations that consume a large amount of water, such as commercial buildings and apartment buildings, the water is once stored in the water receiving tanks on the roof and distributed to the customers from there. The pressure is increased directly from the water pipe or with a small pump and sent to the customer. In this case, in order to reliably prevent the water at the supply destination from flowing back into the distribution pipe, a backflow preventer comprising a combination of the first and second check valves and the relief valve is provided on the suction side or the discharge side of the pump. It is obliged to establish. In this way, by removing the water receiving tank and boosting the water from the distribution pipe with the pump, it is possible to send fresh water directly to the demand destination, while sending fresh water to the demand destination, and the pressure in the distribution pipe is effective. The pump power can be saved, and when the amount of water used at night is low, the pump is stopped and the water pressure in the distribution pipe is used to directly send the water in the distribution pipe to the customer. Contributing to
[0003]
[Problems to be solved by the invention]
In such a water supply device such as a directly connected water booster pump, the influence on the water pressure of the distribution pipe is reduced, and the discharge pressure is also adjusted according to the change in the flow rate by the constant control of the estimated terminal pressure against the pressure fluctuation on the pump suction side. It is necessary to determine and make it possible to continuously operate with high energy saving effect. For this reason, it is necessary for the water supply device to arrange a plurality of pumps in parallel and to arrange a series of control valves in preparation for the operation, switching or stopping of the pumps so as not to cause water supply stoppage due to pump failure or the like. is there. One is to reduce the space occupied by control valves, check valves, etc. in a water supply system that is required to be compact, and the other is to improve operability. ) And discharge piping (pipe to the customer) are required to be easily adaptable according to the situation at the installation site.
[0004]
[Means for Solving the Problems]
The present invention provides a piping device for a water supply device such as a directly connected water booster pump, which is connected to a connection port to a water supply water distribution pipe and is connected to each suction port of a plurality of pumps and communicates with each other via a suction side communication pipe. a suction-side three-way valve train consisting of a plurality of rows of suction side three-way valves, are connected to the pipe connection port to the demand end, to each other discharge-side communicating pipe while being connected to each outlet of the plurality of pumps a discharge-side three-way valve train consisting of a plurality of rows of the discharge side three way valve communicates through the connecting the suction side three-way valve and the discharge-side three-way valve for each pump, handle Misao a rotary shaft intends line switching at the same time the valve Ri by the work, connecting between the discharge side consolidated tube and the suction side consolidated tube, provided with a check valve Ru was circulated only from the suction side to the discharge side and a cross-linking tube, the suction-side three-way valve train, the discharge-side three-way valve train Turned into one unit in parallel placing the rotary shaft and the cross-linking tube on the same plane, it is characterized in that the unit arranged to fit to the parallel arrangement of the plurality of pumps. And, for example, a water supply water pipe is connected to one end of the suction side three-way valve train of the unit via a backflow preventer, and the other end of the discharge side three-way valve train communicates with the pipe connection port of the customer Yes. In this case, the pressure tank is communicated with one end of the discharge side three-way valve train.
[0005]
If the water supply pressure of the water supply pipe is higher than the resistance of the backflow preventer, there is no problem with the backflow preventer provided in the middle of the pump inlet side piping, but if the water supply pressure is low, It is possible that water will not flow after the check valve. For this reason, in such a case, one end of the suction side three-way valve train of the unit is directly connected to the water supply water pipe, and a reverse flow occurs between the other end of the discharge side three-way valve train and the pipe connection port of the customer. A preventer will be placed. In this case, the pressure tank is disposed between 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.
[0006]
As described above, in the piping device of a water supply device such as a directly connected water booster pump, since a plurality of three-way valves and check valves are unitized, the space occupied by the control valve and check valve is reduced, and the water supply device In addition, the operability can be improved, and the connection direction of the suction side pipe (distribution pipe) and the discharge pipe (pipe to the customer) can be easily handled according to the situation at the installation site.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
As an embodiment of the present invention, FIG. 1 shows a unit arrangement in the case where two pumps are arranged in parallel. A row of three-way valves 3 and 4 (suction side three-way valve) connected to each suction port of pump 1 and pump 2 and a three-way valve 5 and 6 (discharge side) connected to the discharge ports of pumps 1 and 2 The three-way valves 3 and 5, 4 and 6 on the suction port side and the discharge port side of the same pump are simultaneously operated by operating the same handles 7 and 8. The valves can be switched by rotating simultaneously by the same rotary shafts 9 and 10 so as to perform switching.
[0008]
The rows of the suction side three-way valves 3 and 4 and the rows of the discharge side three-way valves 5 and 6 are communicated with the communication pipes 11 and 12, respectively, and the communication pipe 11 and the discharge side three-way valve in the row of the suction side three-way valves. The communication pipes 12 in the row are connected by a bridge pipe 14 provided with a check valve 13 that circulates only from the suction side to the discharge side. One end of the suction port side three-way valve 3 of the piping unit 15 of the pumps 1 and 2 formed in this way is connected to the connection port 17 of the water supply water pipe via the backflow preventer 16, and the discharge side three directions. The other end of the valve 6 is communicated with the pipe connection port 18 of the customer. Further, the pressure tank 19 can be communicated with one end of the discharge side three-way valve 5.
[0009]
FIG. 1 shows a typical three-way valve setting and line. In this figure, when the water supply pressure of the water supply pipe is lower than a set value determined so that necessary and sufficient water can be supplied at the demand destination, the pump 1 or 2 is operated to reach the set value. Increase the pressure. When the pump 1 is operated, water from the water supply pipe connection port 17 flows to the three-way valve 3, the pump 1, the three-way valve 5, the communication pipe 12, the three-way valve 6, and the pipe connection port 18 to the customer. Handles 7 and 8 are set to flow. Further, when the pump 2 is operated, water from the water supply water distribution pipe connection port 17 flows to the three-way valve 3, the communication pipe 11, the three-way valve 4, the pump 2, the three-way valve 6, and the pipe connection port 18 to the customer. And flow. The pumps 1 and 2 are operated alternately so that the respective operation times are averaged, and are not operated simultaneously. A check valve is provided at each discharge port of each pump.
[0010]
If the water supply pressure of the water supply distribution pipe is higher than the set value, it is not necessary to operate the pump, and the water supply pressure of the distribution pipe is used to supply water from the connection port 17 to the three-way valve 3 and the communication pipe (suction pipe ). (Side communication pipe) 11, cross-linking pipe 14, check valve 13, communication pipe (discharge side communication pipe) 12, and three-way valve 6, and can be sent to the pipe connection port 18 to the customer. In this case, the suction side three-way valve row (suction side three-way valve row) and the discharge side three-way valve row (discharge side three-way valve row ) so that the decrease in the feed water pressure is kept to a minimum in this path. ) Unit is designed.
[0011]
If the pump 1 or 2 fails and the pump must be removed from the water supply device for repair, the handle of the three-way valve connected to the suction port and the discharge port of the failed pump is operated. Shut off the connection with the pump and operate the pump on the side that does not fail to continue water supply. FIG. 2 shows a state where the handle 7 is operated when the pump 1 fails, and FIG. 3 shows a state where the handle 8 is operated when the pump 2 fails. Needless to say, when the water supply pressure in the water supply pipe is higher than the set value, it is not necessary to operate the pump on the non-failure side.
[0012]
Further, when the feed water pressure is low, there is a certain amount of pressure loss in the backflow preventer 16, so that water may not flow after the check valve 16. Therefore, as shown in FIG. 6, one end of the suction side three-way valve 3 is directly connected to the connection port 17 to the water supply water pipe, the other end of the discharge side three-way valve 6 and the pipe connection port 18 to the customer The backflow preventer 16 is disposed between the two. In this case, the pressure tank 19 is disposed between one end of the discharge-side three-way valve 5 or between the other end of the discharge-side three-way valve 6 and the demand destination pipe connection port 18.
[0013]
1 to 3 and FIG. 6 all show the case where the connection port 17 to the water supply pipe is on the left side of the pump unit, the connection port 17 is on the right side of the pump unit. An arrangement is also possible. When the connection port 17 is on the right side of the pump unit in FIG. 5 and the backflow preventer 16 is on the suction port side, i.e., the connection port 17 side to the water supply pipe, the connection port 17 is also connected to the pump unit in FIG. Although it is on the right side of the unit, a pipe diagram when the backflow preventer 16 is on the discharge side, that is, on the side of the pipe connection port 18 to the demand destination is shown.
[0014]
As an example of the three-way valve on the suction side and the discharge side, a double ball valve 20 as shown in FIG. 7 is used. Each ball valve 20 includes a flow path 21 opened in a predetermined direction, and the suction side and discharge side valves are simultaneously rotated by a handle by a rotating shaft. The three-way valve on the suction side and the discharge side is not limited to the ball valve, and various modifications such as a cylindrical shaft and a spindle type are possible. The operation of these valves is not limited to manual operation, and can be automatically controlled by a motor or the like. FIG. 8 shows an embodiment in which the piping device of the present invention is incorporated into a water supply device. In addition, as shown in these examples, there are two rows of pumps and three-way valves, but it is possible to combine three or more rows of pumps and three-way valves depending on the customer and usage conditions. is there.
[0015]
【The invention's effect】
In the present invention, as described above, the rows of the suction side three-way valves 3 and 4, the row of the discharge side three-way valves 5 and 6, the rotary shafts 9 and 10, and the bridging pipe 14 are arranged in parallel on the same plane. 1 unitized Te, since a structure in which a unit arranged to fit to a parallel arrangement a plurality of pumps, piping as well as a compact, operability in switching the pump is good, also the water supply distribution pipes and demand end In consideration of various conditions such as the position of the connection port, the supply water pressure of the distribution pipe, the supply water pressure to the customer, the connection port with the water supply pipe, the connection port of the pipe to the customer, the backflow preventer and the pressure tank Since the position of the connecting portion can be easily changed, a water supply device with good workability can be provided.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a pipeline diagram showing an example of normal three-way valve settings and pipelines.
FIG. 2 is a conduit diagram showing a state in which a handle is operated when the pump 1 fails.
FIG. 3 is a conduit diagram showing a state in which a handle is operated when the pump 2 fails.
[Fig. 4] One end of the suction side three-way valve is directly connected to the connection port to the water supply pipe, and a backflow preventer is arranged between the other end of the discharge side three-way valve and the pipe connection port to the customer. A pipeline diagram is shown.
FIG. 5 is a pipeline diagram when the connection port to the water supply water distribution pipe is on the left side of the pump unit and the backflow preventer is on the connection port side to the water supply water distribution pipe.
FIG. 6 is a pipe diagram when the connection port to the water supply pipe is on the right side of the pump unit and the backflow preventer is on the piping connection port side to the customer.
FIG. 7 shows a sketch of a double ball valve as an example of a three-way valve.
FIG. 8 shows an embodiment in which the piping device of the present invention is incorporated into a water supply device.
[Explanation of symbols]
1 Pump 1
2 Pump 2
3 Three-way valve 4 on the inlet side of the pump 1 Three-way valve 5 on the inlet side of the pump 2 Three-way valve 6 on the outlet side of the pump 1 Three-way valve 7 on the outlet side of the pump 2 Handle 1
8 Handle 2
9 Rotating shaft 1
10 Rotating shaft 2
DESCRIPTION OF SYMBOLS 11, 12 Connection pipe | tube 13 Check valve 14 Bridge pipe 15 Piping unit 16 Backflow preventer 17 Connection port to waterworks water distribution pipe 18 Pipe connection port to a customer 19 Pressure tank 20 Double ball valve 21 Flow path

Claims (4)

Is connected to the connection port to the water supply distribution pipes, the suction side three way that consists of a sequence of a plurality of suction-side three-way valve which communicates through a suction-side communicating pipe together with connected to each inlet of the plurality of pumps A valve train ,
Is connected to the pipe connection port to the demand end, the discharge side three consisting of a plurality of rows of the discharge side three way valve communicates via a discharge-side communicating pipe together with coupled to the discharge port of the plurality of pumps A directional valve train ;
Wherein each said suction side three-way valve for each pump and connecting the discharge side three way valve, intends row switches the I Ri simultaneously valve handle operation rotating shaft,
The connecting between the suction side consolidated tube the discharge side consolidated tube, and a cross tube provided with a check valve Ru was circulated only from the suction side to the discharge side,
The suction side three-way valve train, the discharge side three-way valve train, the rotating shaft and the bridging pipe are arranged in parallel on the same plane to form one unit , and the unit arrangement according to the plurality of pumps arranged in parallel the piping system of the water supply equipment. The piping device of the water supply apparatus according to claim 1, further comprising a pressure tank arranged in communication with one end of the discharge side three-way valve train . Between the suction-side three-way valve train and the connection port to the water supply water pipe, or claim 1 is arranged the backflow preventer between the discharge side three way valve train and the pipe connection port to the demand end or The piping apparatus of the water supply apparatus of 2. The water supply device according to any one of claims 1 to 3 , wherein each of the three-way valves on the suction side and the discharge side of each pump is formed by a ball valve, and the two ball valves are connected by the rotating shaft . Plumbing equipment.

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