JP5244690B2 - Booster water supply device - Google Patents

Description

  The present invention relates to a pressure-increasing water supply apparatus that can reduce periodic fluctuations in pressure generated on the primary side and converge it quickly.

  2. Description of the Related Art In recent years, a directly connected water supply method has been performed in which a pressure-increasing water supply device is connected in series to a pressure-increasing water supply device, and tap water is directly supplied to a higher floor. Specifically, a booster water supply device is installed on the ground part of the building and the intermediate floor, respectively, and a booster water supply device installed in the vicinity of the ground (hereinafter referred to as “ground pressure booster water supply device”) and an intermediate floor. The increased pressure water supply device (hereinafter referred to as “intermediate pressure increase water supply device”) is connected in series, and the tap water supplied by the ground pressure increase water supply device is pressurized by the intermediate pressure increase water supply device. This is a method of supplying water directly to higher floors. Such a directly-connected water supply method does not require a large water tank on the top floor of the building, simplifies the structure of the building, and directly supplies water, which is preferable in terms of the quality of tap water.

  Furthermore, the intermediate pressure increasing water supply device needs to realize stable water supply at each level across the intermediate pressure increasing water supply device. When the intermediate pressure boosting water supply device is operated, it is necessary to prevent the water supply pressure from dropping significantly on the floor below the floor where the intermediate pressure boosting water supply device is installed before the ground pressure boosting water supply device is activated. is there.

  For example, in Patent Document 1, in order to prevent the suction side water supply pipe and the distribution main pipe from becoming negative pressure when the booster pump is started, means for limiting the amount of water flowing into the pressure tank is provided in the middle of the pressure tank pipe. The invention has been described.

JP-A-7-54382

  However, when a pressure tank such as an accumulator is installed in the water supply pipe, the pressure in the water supply pipe may fluctuate periodically due to the elasticity of the pressure tank. That is, when the pump is operated and the air chamber of the pressure tank is compressed and contracted at a high pressure, the air chamber is expanded by the swing back. In addition, it is repeatedly performed to be compressed by the reaction, which may cause long-term pressure fluctuations, that is, hunting.

  Furthermore, when supplying water by connecting the pressure-increasing water supply apparatus in series, the pipe length of the piping between the pressure-increasing water supply apparatuses becomes long. Therefore, for example, the intermediate pressure increasing water supply device is operated, and the time difference until the pressure drop generated on the primary side reaches the pressure sensor of the ground pressure increasing water supplying device and the ground pressure increasing water supplying device is activated increases. In particular, if the pipe is bent, it is assumed that the pressure wave is reflected in the pipe and it takes time to reach and the start-up is further delayed.

  Therefore, a pressure tank with sufficient capacity is installed in the intermediate pressure increasing water supply device installed after the second stage when the pressure increasing water supply devices are connected in series, and the pressure fluctuation on the primary side of the intermediate pressure increasing water supply device It is necessary to suppress fluctuations in flow rate. Then, the change in the capacity of the pressure tank becomes large, causing a larger fluctuation of the pressure cycle, which is continued for a long time.

  Further, the directly connected water-type inflow pressure fluctuation mitigation device of the above-mentioned conventional example is an invention which attempts to solve the pressure drop on the suction side of the booster pump by a pressure tank provided on the discharge side, and is provided on the suction side of the booster pump. It is not an invention in which the flow rate of the pressure tank is adjusted.

  This invention solves the said subject, and it aims at providing the pressure increase water supply apparatus which can suppress the periodic fluctuation of the feed water pressure by a pressure tank effectively.

In order to solve the above-described problem, in the present invention, the pressure increasing water supply apparatus is configured as follows.
A flow rate adjusting unit in which the amount of outflow per hour is larger than the amount of inflow per hour is provided in the pipe connection portion of the pressure tank provided on the suction side of the pressure increasing water supply apparatus.

The flow rate adjustment unit was a check valve provided with a bypass passage.
A plurality of pressure tanks were connected in series to the suction side of the pressure increasing water supply apparatus.
A plurality of pressure tanks were connected in parallel to the suction side of the pressure increasing water supply apparatus, and a flow rate adjusting unit was provided in each pressure tank.

  The said structure was set as the structure accommodated in one package.

  The increased pressure water supply apparatus of the present invention has the following effects.

  When the pressure-increasing water supply device starts and the pressure on the suction side of the pressure-increasing water supply device decreases, tap water stored in the pressure tank flows out without a large flow resistance, and tap water pressure fluctuation on the suction side And fluctuations in flow rate can be suppressed.

  In addition, in direct-coupled pressure-increasing water supply devices in the second and subsequent stages, in which the pressure-increasing water supply devices are connected in series, even if there is a slight delay in the startup of the pressure-increasing water supply device connected to the primary side, Pressure fluctuations and flow fluctuations can be suppressed. And when the pressure increase water supply apparatus connected with the primary side starts and a pressure rises, tap water will flow in into a pressure tank gradually. As a result, the tap water does not continuously flow into the pressure tank after the pressure has reached equilibrium, and periodic fluctuations in pressure caused by excessive inflow can be suppressed. Moreover, pressure fluctuations can be converged at an early stage to stabilize the pressure.

  Since generation of periodic pressure fluctuations can be suppressed, a pressure tank having a large capacity can be used, and water pressure fluctuations and flow rate changes on the primary side can be efficiently reduced. By configuring the flow rate adjusting unit with a check valve with a bypass passage, the structure can be simplified and the cost can be reduced.

It is a block diagram which shows one Embodiment of the pressure increase water supply apparatus concerning this invention. It is front sectional drawing which shows a pressure increase water supply apparatus. It is sectional drawing which shows a pressure increase water supply apparatus. It is side surface sectional drawing which shows a pressure increase water supply apparatus. It is sectional drawing which shows a check valve. It is sectional drawing which shows the other example of a check valve. It is a block diagram which shows other embodiment of a pressure increase water supply apparatus. It is a block diagram which shows the arrangement | positioning state of a pressure increase water supply apparatus.

  One Embodiment of the pressure increase water supply apparatus concerning this invention is described.

  In FIG. 2, the direct connection type pressure increase water supply apparatus 10 is shown. The direct connection type pressure increase water supply apparatus 10 includes a gantry body 12, a primary side pipe 14, a pressurizing pump 16, a secondary side pipe 18 (see FIG. 3), an accumulator 20, and the like. Hereinafter, the direct connection type pressure-increasing water supply device 10 will be described with the upstream and the downstream determined according to the pumping direction of tap water by the direct connection type pressure-increasing water supply device 10. When a certain position is used as a reference, the upstream side of the reference position is also called a primary side, and the downstream side is also called a secondary side.

  The gantry body 12 is vertically long, and is provided with a door 22 (see FIG. 4) that can be opened and closed on the front surface. A storage chamber 24 is formed in the upper part of the gantry body 12, and a control device 30, a power supply device 32, and the like are stored in the storage chamber 24. A pressurizing pump 16, an accumulator 20, and the like are stored in the lower portion of the storage chamber 24.

  The pressurizing pump 16 is an electric pump having a predetermined water supply performance, and three pumps of the same type are provided in the gantry body 12. As shown in FIG. 1, a power line 33 from a power supply device 32 is connected to the pressurizing pump 16 via a drive unit 34, and according to an instruction from the control device 30, individually and with an arbitrary driving force. It can be driven.

  A connecting pipe 36 is connected to each suction port of the pressurizing pump 16. The other end side of each connecting pipe 36 is connected to the primary side pipe 14. Further, a connecting pipe 38 is connected to each discharge port of the pressurizing pump 16. The other end of each connecting pipe 38 is connected to the secondary pipe 18.

  Each connection pipe 36 is provided with a water stop valve 37 and a check valve 39, respectively. Each connecting pipe 38 is provided with a check valve 41, a flow meter 49, and a water stop valve 45. The water stop valve 37 and the like are valves that open and close the passage by operating the handle. The check valve 39 or the like is a valve that circulates tap water only in one direction. The check valve 39 and the check valve 41 are attached so as to flow along the flow direction of the pressurizing pump 16.

  As shown in FIG. 2, the primary side pipe 14 is mounted substantially horizontally inside the gantry body 12 via a stay 120 (see FIG. 4). At the left and right ends of the primary side pipe 14, flanges 40 and 42 are provided, respectively, and the water supply pipe can be connected via the flanges 40 and 42 on either side. In the direct connection type pressure increasing water supply apparatus 10, as shown in FIG. 2, an inlet 28 is formed at the left end of the primary side pipe 14. A water supply pipe 102 described later is connected to the inflow port 28. A first pressure sensor 52 is attached to the primary side pipe 14. The first pressure sensor 52 measures the pressure in the primary side pipe 14 and sends the measurement result to the control device 30.

  Further, an accumulator 20 as a pressure tank is attached to the primary side pipe 14. The accumulator 20 is a pressure accumulator provided with an elastic body such as a rubber bellows and a spring (both not shown), and stores tap water in accordance with the pressure. Two accumulators 20 are provided and are connected to each other by a connecting pipe 46. A connecting pipe 48 is connected to the connecting pipe 46, and the connecting pipe 46 is connected to the primary side pipe 14 via the connecting pipe 48. The accumulator 20 absorbs pressure fluctuations in the primary side pipe 14, stores water therein, discharges the stored water, and adjusts the flow rate of tap water flowing through the primary side pipe 14. A stop valve 47 and a check valve 3 as a flow rate adjusting unit are attached to the connection pipe 48.

  The check valve 3 is a one-way valve that opens from the accumulator 20 to the primary side pipe 14. Further, as shown in FIG. 5, the check valve 3 is formed so that the bypass passage 5 bypasses the valve 7. As a result, the check valve 3 flows from the accumulator 20 to the primary side pipe 14 without any great resistance when the valve 7 is opened, but the tap water flows from the primary side pipe 14 to the accumulator 20 through the narrow bypass passage 5. It flows in while receiving a large flow resistance.

  As shown in FIG. 3, the secondary side pipe 18 is attached to the inside of the gantry body 12 almost horizontally through the stay 120 like the primary side pipe 14. Flange 43,44 is each provided in the right-and-left both ends of the secondary side piping 18, and a water supply pipe can be connected through the flanges 43,44 of any side. As shown in FIG. 3, the direct connection type pressure increasing water supply apparatus 10 has a discharge port 26 formed at the right end of the secondary side pipe 18. A water supply pipe 104 to be described later is connected to the discharge port 26. A water stop valve 35 (see FIG. 1) for opening and closing the secondary side pipe 18 is provided upstream of the discharge port 26.

  Further, a second pressure sensor 54 and an accumulator 21 are attached to the secondary side pipe 18. The second pressure sensor 54 measures the pressure in the secondary side pipe 18 and sends the measurement result to the control device 30. The accumulator 21 has the same configuration as the accumulator 20 and has a function of adjusting the pressure and flow rate in the secondary side pipe 18.

  A bypass pipe 60 is provided between the primary side pipe 14 and the secondary side pipe 18. A check valve 62 is attached to the bypass pipe 60. The check valve 62 is a check valve that is opened from the primary side pipe 14 toward the secondary side pipe 18, and the primary side pipe 14 and the secondary side pipe 18 are connected via the check valve 62.

  In FIG. 8, the installation state of the direct connection type pressure increase water supply apparatus 10 is shown. The building 110 shown in FIG. 8 is a building of about 30 floors, and the pressure-increasing water supply device 100 is installed on the ground portion. A water supply pipe 102 and a water supply pipe 104 are laid throughout the building 110.

  The pressure increasing water supply device 100 is a model having a water supply capacity of 15 floors or more above the ground, and is directly connected to the water main 112, pressurizing the tap water of the water main 112 to a predetermined pressure, and via the water supply 102. Then, water is supplied from the first floor to the 15th floor in the building 110. A backflow prevention device 114 is provided between the pressure increasing water supply device 100 and the water main 112. The backflow prevention device 114 is a predetermined type of backflow prevention device that must be installed.

  Directly connected pressure increasing water supply apparatus 10 is installed on the 15th floor of building 110. The direct connection type pressure-increasing water supply device 10 is connected in series with the pressure-increasing water supply device 100 through the water supply pipe 102, takes in tap water from the water supply pipe 102, pressurizes it, and supplies water to the top floor of the building 110 through the water supply pipe 104. . Further, intake and exhaust valves 116 and 118 are provided at the uppermost portions of the water supply pipe 102 and the water supply pipe 104, respectively.

  In addition, the pressure increase water supply apparatus 100 may be the same pressure increase water supply apparatus as the direct connection type pressure increase water supply apparatus 10, or may be a different type pressure increase water supply apparatus. Further, the number of floors of the building 110, the number of floors where the direct connection type pressure increasing water supply apparatus 10 is installed, etc. are not particularly limited.

  As described above, the pressure-increasing water supply device 100 and the direct connection type pressure-increasing water supply device 10 are connected in series, so that the portion of the water supply pipe 102, that is, the ground to the 15th floor is supplied with water by the pressure-increasing water supply device 100. In the floor above the 15th floor, the tap water pumped by the pressure-increasing water supply apparatus 100 is pressurized by the direct connection type pressure-increasing water supply apparatus 10 and supplied.

  For example, it is assumed that water is used on the 17th floor in a state where the pressure-increasing water supply device 100 and the direct connection type pressure-increasing water supply device 10 are stopped. Then, since the pressure in the secondary side pipe 18 of the direct connection type pressure increasing water supply apparatus 10 decreases, the second pressure sensor 54 detects the pressure decrease, and the pressurizing pump 16 operates to pressurize and supply water. In addition, when the directly connected pressure increasing water supply apparatus 10 is operated, tap water is absorbed from the water supply pipe 102 and the pressure in the water supply pipe 102 is reduced.

  The pressure drop is detected by a pressure sensor (not shown) provided in the pressure increase water supply apparatus 100, and the pressure increase water supply apparatus 100 is activated. The tap water stored in the accumulator 20 as a pressure tank passes through the check valve 3 and is connected to the primary side pipe until the pressure increase water supply device 100 is activated after the direct connection type pressure increase water supply device 10 is activated. 14, the flow rate drop and pressure drop on the primary side of the direct connection type pressure increasing water supply apparatus 10 are prevented.

  And if the pressure increase water supply apparatus 100 starts and water is supplied to the water supply pipe 102, the pressure in the primary side piping 14 will rise. When the pressure in the primary side pipe 14 becomes higher than the pressure in the accumulator 20, tap water flows into the accumulator 20. However, in the flow in such a direction, the valve 7 is in a closed state, so that the tap water flows into the accumulator 20 through the bypass passage 5. When tap water passes through the bypass passage 5, the flow resistance increases, so that the tap water gradually flows into the accumulator 20.

  In this way, the bypass passage 5 has a large flow resistance, and tap water gradually flows into the accumulator 20. Therefore, when the pressure in the primary side pipe 14 and the pressure in the accumulator 20 become substantially equal, the inflow almost stops. Therefore, the tap water does not flow into the accumulator 20 beyond the equilibrium pressure state, and the periodic pressure fluctuation due to the swinging back of the accumulator 20 does not occur.

  Therefore, according to the direct connection type pressure increasing water supply apparatus 10, the accumulator 20 having a large capacity is connected to the primary side pipe 14, or a plurality of accumulators 20 are provided in series so that the pressure fluctuation on the primary side of the pressure pump 16 Even when the change in the flow rate is reliably suppressed and the capacity is increased in this way, the pressure does not fluctuate periodically.

  FIG. 6 shows another example of the check valve. The check valve 3 bypasses the valve 7 to form the bypass passage 5, but the check valve 9 forms the bypass passage 5 in the valve 7. Even when the check valve 9 is configured in this manner, the tap water stored in the accumulator 20 is primarily passed through the check valve 9 until the pressure-increasing water supply device 100 is operated, as in the check valve 3. Since it supplies to the side piping 14, the flow volume fall and pressure fall by the primary side of the direct connection type | mold pressure increase water supply apparatus 10 are prevented.

  And when the pressure increase water supply apparatus 100 starts, the pressure in the primary side piping 14 will rise, and tap water will flow in in the accumulator 20, but since tap water flows in in the accumulator 20 through the bypass channel 5, it is a tap water. Water gradually and slowly flows into the accumulator 20 and does not cause periodic pressure fluctuations.

  FIG. 7 shows another example of the pressurized water supply apparatus. In this configuration, the accumulators 20 are connected in parallel to the primary side pipe 14, and the water stop valve 47 and the check valve 3 are provided in each accumulator 20. Even if it does in this way, the effect similar to the above can be acquired.

  In this example, the check valve may be the check valve 3 or the check valve 9. Further, the open spring pressure of the valve 7 of each check valve and the water flow resistance of the bypass passage 5 may be the same or different.

  INDUSTRIAL APPLICABILITY The present invention can be used for a pressure increasing water supply device including a pressure tank.

DESCRIPTION OF SYMBOLS 3 ... Check valve 5 ... Bypass passage 10 ... Direct connection type pressure increase water supply apparatus 14 ... Primary side piping 16 ... Pressure pump 18 ... Secondary side piping 20 ... Accumulator 26 ... Discharge port 28 ... Inlet port 29 ... Connection port 30 ... Control Device 35, 37, 47 ... Water stop valve 52 ... First pressure sensor 54 ... Second pressure sensor 100 ... Increase pressure water supply device

Claims (5)

In the pressurized water supply device that pressurizes the water sucked from the suction side pipe and discharges it to the discharge side pipe,
A pressure tank connected to the suction side piping;
A flow rate adjusting portion provided between the pressure tank and the suction side pipe,
Furthermore, the flow rate adjusting unit is characterized in that the flow rate per hour from the suction side pipe to the pressure tank is set smaller than the flow rate per hour from the pressure tank to the suction side pipe. Booster water supply device.   The said pressure tank consists of a some pressure tank, and connected each pressure tank in series with the said piping of the suction side, The pressure increase water supply apparatus of Claim 1 characterized by the above-mentioned.   The pressure tank is composed of a plurality of pressure tanks, each pressure tank is connected in parallel to the suction side pipe, and the flow rate adjusting unit is provided between each pressure tank and the suction side pipe. The pressure-increasing water supply device according to claim 1.   The pressure increase water supply device according to any one of claims 1 to 3, wherein the flow rate adjusting unit is formed of a check valve and a bypass passage parallel to the check valve.   Each pressure increase water supply apparatus of Claims 1-4 WHEREIN: Each pressure increase water supply apparatus was accommodated and comprised in one housing | casing, The pressure increase water supply apparatus characterized by the above-mentioned.

Images