JP2017141723A - Pump system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the energy conservation for the water level regulation in a storage area.SOLUTION: A pump system 1 comprises: a partition wall part forming a storage area capable of storing water separately from external water; a pump P for pumping up water from the external water; a delivery pipe DP connected to the pump for blowing out the water pumped up by the pump to the storage area; a delivery valve DV provided along the delivery pipe; and a siphon pipe SP with one end connected to the delivery pipe on the storage area side or being immersed in the water stored in the storage area and the other end being immersed in the water of an area other than the storage area. After the pump is stopped, in a state that the siphon pipe and the delivery pipe are filled with water, when the water level in the storage area increases over the water level of an area other than the storage area, the water in the storage area is discharged to an area other than the storage area through the siphon pipe.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pump system.

  In a storage area (for example, a boat race track) used for experiments, competitions, aquaculture, etc., it is necessary to strictly control and set the water level for the purpose and condition setting. In order to adjust the water level in the storage area, a water injection pump for raising the water level and a drainage pump for lowering the water level are usually installed. However, when these storage areas are installed outdoors, it is necessary to consider the influence on the water level such as inflow of rainwater. In addition, from the viewpoint of securing a water source for controlling the water level in the storage area, a sea with abundant water sources is the most efficient, and the storage area is often installed in a beach area.

  In such a case, for the water level adjustment in the storage area, it is necessary to perform the water level maintenance and fine adjustment under a condition that is closed to some extent and under outdoor conditions that are subject to various external influences. In particular, while maintaining the specified water level, it is necessary to operate for a long period of time while replacing the water to ensure the water quality. Until now, water level maintenance and fine adjustment have been carried out by operating water injection pumps and drainage pumps.

JP 2002-98085 A JP 2006-233865 A JP 2013-79648 A

  However, since it is necessary to operate the pump at the time of fine adjustment of the water level, there is a problem that a lot of energy is used and the running cost (for example, electricity usage fee, fuel cost, etc.) increases.

  This invention is made | formed in view of the said problem, and it aims at providing the pump system which makes it possible to improve the energy-saving property of the water level adjustment of a storage area.

  A pump system according to a first aspect of the present invention is connected to a partition wall portion that forms a storage area capable of storing water isolated from outside water, a pump that pumps water from outside water, and the pump. A discharge pipe for discharging water pumped up by the pump to the storage area; a discharge valve provided in the discharge pipe; or one end connected to the discharge pipe closer to the storage area than the discharge valve or the storage area And a siphon pipe whose other end is immersed in water other than the storage area, and after the pump stops, the siphon pipe and the discharge pipe are filled with water. Then, when the water level in the storage area rises beyond the water level in the area other than the storage area, the water in the storage area is discharged to the area other than the storage area via the siphon tube.

  Thereby, when the water level of a storage area rises, since the water level of a storage area can be reduced without driving without operating a pump, energy saving property can be improved.

  The pump system according to a second aspect of the present invention is the pump system according to the first aspect, further comprising a water receiving tank in which water is stored up to a specified water level, and the other end of the siphon pipe is connected to the receiving system. When the water level of the storage area rises above the specified water level in a state where the water is filled in the siphon pipe and the discharge pipe after the pump is stopped after being immersed in water of the aquarium, the storage area Water is discharged to the water receiving tank through the siphon tube.

  Accordingly, the siphon action in the siphon tube can be maintained because the other end of the siphon tube is surely immersed in the water in the water receiving tank regardless of the fluctuation in the water level of the outside water.

  The pump system according to a third aspect of the present invention is the pump system according to the second aspect, wherein the specified water level is an upper limit height of a water surface that can be stored in the water receiving tank, and an upper surface of the water receiving tank. Excess water is discharged out of the water receiving tank.

  Thereby, when the water of a storage area is discharged | emitted to a water receiving tank and the water level exceeds the upper limit height of the water surface which can be stored in a water receiving tank, the water of that amount is discharged out of a water receiving tank. For this reason, since the water level of the water receiving tank is maintained at the upper limit of the water level that can be stored in the water receiving tank, that is, the specified water level, the water level continues to decrease until the water level in the storing area reaches the specified water level, Return to the specified water level. Therefore, even if the water level in the storage area rises temporarily, the water corresponding to the rising water level is discharged by the siphon action and returns to the specified water level, so that the stability of the water level adjustment in the storage area can be improved.

  The pump system according to a fourth aspect of the present invention is the pump system according to the third aspect, further comprising a water surface height changing unit capable of changing the upper limit height of the water surface that can be stored in the water receiving tank, In the state where the siphon tube and the discharge tube are filled with water, the specified water level is changed by changing the upper limit height of the water surface that can be stored by the water surface height changing unit.

  Thereby, the water level which a storage area maintains can be changed.

  The pump system which concerns on the 5th aspect of this invention is a pump system which concerns on a 4th aspect, Comprising: The said water surface height change part is the weir which was installed in the side surface which comprises the said water-receiving tank, and whose height is adjustable. It is.

  Thereby, the water level which a storage area maintains can be changed.

  The pump system according to a sixth aspect of the present invention is the pump system according to any one of the second to fifth aspects, and includes a water level detection unit that detects the water level of the water receiving tank.

  Thereby, since the water level of the storage area is maintained at the same water level as the water level of the water receiving tank by the siphon action, the water level of the storage area can be determined by measuring the water level of the water receiving tank. Since the water receiving tank is installed separately from the storage area, it is possible to prevent undulations caused by disturbances such as wind, boats or canoes, and there is no influence of undulations in the storage area. Can be determined with high accuracy.

  The pump system which concerns on the 7th aspect of this invention is a pump system which concerns on a 6th aspect, Comprising: The alerting | reporting device which can alert | report to the circumference | surroundings, and the water level detected by the said water level detection part are predetermined lower limits. And a control device that controls to notify from the alarm when the water level is below or when a predetermined upper limit water level is exceeded.

  Thereby, the manager of the pump system can be notified of an abnormal water level drop.

  The pump system according to an eighth aspect of the present invention is the pump system according to any one of the first to seventh aspects, further comprising a check valve provided in the siphon tube, wherein the check valve is Stop the flow of water from one end of the siphon tube to the other end of the siphon tube.

  Thereby, since water does not return from a water receiving tank to a storage area, it is possible to prevent fluctuations in the water level such as waves from being transmitted to the water receiving tank. For this reason, disturbance of the water surface of the water receiving tank can be suppressed.

  The pump system according to a ninth aspect of the present invention is the pump system according to any one of the first to seventh aspects, wherein the siphon pipe and the discharge pipe are filled with water after the pump stops. In the state, when the water level of the storage area falls below the water level of the water other than the storage area, the water other than the storage area is supplied to the storage area via the siphon tube.

  Thereby, since the water level of a storage area rises until it becomes the same as the water level of a receiving tank, the water level of a storage area is recoverable.

  According to one embodiment of the present invention, when the water level in the storage area rises, the water level in the storage area can be reduced without driving the pump without operating the pump. Therefore, energy saving can be improved.

It is the schematic of the pump system 1 which concerns on 1st Embodiment. It is a flowchart which shows an example of the water injection operation | movement by a pump driving | operation. It is a state transition diagram in case the water level of the storage area T1 rises from a regulation water level. It is a state transition figure in case the water level of the storage area T1 falls from the regulation water level. It is a flowchart which shows an example of operation | movement of the control apparatus CON. It is the schematic of the pump system 2 which concerns on 2nd Embodiment. It is a flowchart which shows an example of the water injection operation | movement by a pump driving | operation. It is the schematic of the pump system 3 which concerns on 3rd Embodiment. It is the schematic of the pump system 4 which concerns on the modification of 1st Embodiment.

Each embodiment will be described below with reference to the drawings.
<First Embodiment>
FIG. 1 is a schematic view of a pump system 1 according to the first embodiment. As shown in FIG. 1, the pump system 1 includes a partition wall T <b> 1 that forms a storage area that can store water by being isolated from outside water (e.g., sea, river, lake, swamp, etc.), and a storage area A water level gauge WG for measuring the water level of the water. The storage area is, for example, a water area of a motor boat stadium, a water area of a canoe stadium, or a large aquarium.

  Further, the pump system 1 includes a pump P that pumps water from outside water, and a discharge pipe DP that is connected to the pump P and discharges the water pumped by the pump P to a storage area. Further, the pump system 1 includes a check valve RV that connects the pump P and the discharge pipe DP to prevent the backflow of water from the discharge pipe DP to the pump P, and a discharge valve DV provided in the discharge pipe DP. When the pump P is in operation, water is pumped from outside water as indicated by an arrow A1, and the pumped water is discharged from the discharge pipe DP to the storage area as indicated by an arrow A2 through the pump P and the discharge pipe DP. The Since the check valve RV is added as necessary, the pump system 1 may not include the check valve RV.

  Further, the pump system 1 includes a water receiving tank T2 capable of storing water, a water level detecting unit WD for detecting the water level of the water receiving tank T2, one end connected to the discharge pipe DP on the storage area side from the discharge valve DV, and the other end Includes a siphon pipe SP that is immersed in water other than the storage area (here, water in the water receiving tank T2). The water level detection unit WD may be a water level meter that directly measures the water level, or may determine the water level from an image captured by imaging the water receiving tank T2 with a camera.

  The pump system 1 further includes a siphon valve SV provided in the siphon pipe SP and a siphon break valve SBV provided in the pump P. The siphon break valve SBV eliminates the siphon action by opening the valve during emergency stop or emergency stop and mixing air into the siphon tube. The siphon valve SV and the siphon break valve SBV according to the present embodiment are electric valves as an example, but may be manual valves. Since the siphon break valve SBV is added as necessary, the pump system 1 may not include the siphon break valve SBV.

  Further, the pump system 1 includes an opening / closing device OC that is provided in the storage area and can be opened and closed. The opening / closing device OC is, for example, a gate or a valve. The water level in the storage area may be adjusted by discharging the water in the storage area to the outside water as indicated by arrow A3 by the switchgear OC, or the water level may be adjusted in combination. Since the opening / closing device OC is added as necessary, the pump system 1 may not include the opening / closing device OC.

  The pump system 1 further includes a control device CON connected to the water level gauge WG, the water level detection unit WD, the discharge valve DV, the siphon valve SV, and the siphon break valve SBV. The control device CON controls the discharge valve DV, the siphon valve SV, and the siphon break valve SBV. Furthermore, the pump system 1 includes an alarm AL that is connected to the control device CON and can notify the surroundings.

  Furthermore, the pump system 1 includes a water surface height changing portion (water receiving tank outlet) WHC that can change the upper limit height of the water surface that can be stored in the water receiving tank T2. The water surface height changing unit WHC according to the present embodiment is a weir G that is installed on the side surface of the water receiving tank T2 and can be adjusted in height. The weir G may be a movable gate or a structure that can be increased or decreased (for example, a square member, a plate member, a pipe, etc.). The movable gate may be manual or electric. If the structure can be increased or decreased, the structure can be further stacked when the height is increased, and the structure can be dropped when the height is decreased.

Then, operation | movement of the pump system 1 which concerns on this embodiment is demonstrated. In the storage area, the water level is normally maintained at the specified level. However, the water level may rise above the specified water level due to rainfall or an overshoot phenomenon that pumps water excessively without stopping the operation of the pump P.
In the water receiving tank T2, water is stored up to a specified water level. In addition, when the siphon pipe SP and the discharge pipe DP are filled with water, the water moves between the storage area and the water receiving tank T2 so that the water level of the storage area and the water receiving tank T2 becomes the same by the siphon action. To do. For this reason, when the water level of the storage area rises above the specified water level (that is, the water level of the water receiving tank T2) with the siphon pipe SP and the discharge pipe DP filled with water after the pump P is stopped, Water is discharged into the water receiving tank T2 through the siphon pipe SP. Thereby, when the water level of a storage area rises, without operating the pump P, the water level of a storage area can be reduced without power, so that energy saving can be improved. Moreover, since the other end of the siphon pipe SP is surely immersed in the water in the water receiving tank T2 regardless of the fluctuation of the external water level, the siphon action in the siphon pipe SP can be maintained.

  Here, outside that affects the water level of the storage area, such as inflow of rainwater into the storage area, leakage from the storage area, wind, swell due to disturbance such as boat or canoe, or tidal influence (in the case of beach area) There is a known factor. When the capacity in the storage area is large, the water level varies depending on the location even in the storage area due to these external factors (for example, ripples). It is difficult to accurately detect the amount of water in the storage area. For this reason, when fine adjustment of the flow rate for maintaining the water level is performed by a valve or rotation speed control, a deviation occurs between the adjustment amount and the increase or decrease of the water amount in the water area. Thereby, conventionally, there has been a problem that the frequency of pump start / stop increases and the water level adjustment is not stable.

  On the other hand, the specified water level according to the present embodiment is the upper limit height of the water surface that can be stored in the water receiving tank T2, and the water exceeding the upper surface of the water receiving tank T2 is discharged outside the water receiving tank T2. As a result, when the water in the storage area is discharged to the water receiving tank T2, and the water level exceeds the upper limit of the water level that can be stored in the water receiving tank T2, the corresponding water is discharged outside the water receiving tank T2. Is done. For this reason, since the water level of the water receiving tank T2 is maintained at the upper limit height of the water surface that can be stored in the water receiving tank T2, that is, the specified water level, the water level continues to decrease until the water level in the storage area reaches the specified water level. The water level returns to the specified water level. Therefore, even if the water level in the storage area rises temporarily, the water corresponding to the rising water level is discharged by the siphon action and returns to the specified water level, so that the stability of the water level adjustment in the storage area can be improved.

  Further, in the present embodiment, in a state where the siphon pipe SP and the discharge pipe DP are filled with water, the specified water level is changed by changing the upper limit height of the water surface that can be stored by the water surface height changing unit WHC. Thereby, the water level which a storage area maintains can be changed. As described above, in the present embodiment, the water surface height changing unit WHC is the weir G that is installed on the side surface of the water receiving tank T2 and can be adjusted in height. Thereby, the water level which a storage area maintains can be changed.

  Furthermore, the pump system 1 according to the present embodiment includes a water level detection unit WD that detects the water level of the water receiving tank T2. Thereby, since the water level of the storage area is maintained at the same water level as the water level of the water receiving tank T2, the water level of the storage area can be determined by measuring the water level of the water receiving tank T2. Since the water receiving tank T2 is installed separately from the storage area, it is possible to prevent undulations caused by disturbances such as wind, boat or canoe, and there is no influence of undulations in the storage area. The water level can be determined with high accuracy. Further, even when it is desired to raise the specified water level by a predetermined height (for example, several centimeters) smaller than the wave height (for example, several tens of centimeters), while looking at the highly accurate water level detected by the water level detection unit WD. The weir G can be raised by a predetermined height.

  In addition, during normal times, the storage area maintains the specified water level, but the water level may decrease from the specified water level due to the occurrence of water leakage from the storage area as indicated by the arrow A4 in FIG. In this case, after the pump is stopped, the water level in the storage area falls below the water level in the storage area other than the storage area (here, the water receiving tank T2) with the siphon pipe SP and the discharge pipe DP filled with water. Water other than the storage area (here, the water receiving tank T2) is supplied to the storage area via the siphon pipe SP. Thereby, since the water level of a storage area rises until it becomes the same as the water level of the receiving tank T2, the water level of a storage area can be recovered | restored.

  Next, the water injection operation by the pump operation will be described with reference to FIG. FIG. 2 is a flowchart showing an example of the water injection operation by the pump operation. The following explanation is based on the assumption that the discharge valve DV is fully closed, the siphon valve SV is fully closed, and the siphon brake valve SBV is fully closed.

  (Step S101) First, the control device CON determines whether or not the water level in the storage area is less than the specified water level, using the measurement value of the water level gauge WG. If the water level is not less than the specified water level, the control device CON stands by.

  (Step S102) When it is determined in step S101 that the water level is lower than the specified water level, the control device CON opens the discharge valve DV from fully closed to fully open and starts the operation of the pump P.

  (Step S103) Water is poured from the outside water into the storage area by the pump operation.

  (Step S104) The control unit CON determines whether or not the water level in the storage area has reached the specified water level using the measured value of the water level gauge WG. If the water level in the storage area has not reached the specified water level, the control device CON stands by as it is.

  (Step S105) When it is determined in step S104 that the water level in the storage area has reached the specified water level, the controller CON opens the siphon valve SV from fully closed to fully open, and fills the siphon pipe SP with water. Thus, the siphon tube SP is filled with water by the operation of the pump P. After filling the siphon pipe SP with water, the controller CON closes the discharge valve DV from fully open to fully closed, and stops the pump P. Thereby, water injection is completed.

  The siphon valve SV may be always fully open. Thereby, since water always flows through the siphon tube SP, the siphon tube SP can be always filled with water.

  Next, the water level adjustment by the siphon action after the pump P is stopped will be described with reference to FIGS. As a premise, the following description will be made assuming that the discharge valve DV is fully closed, the siphon valve SV is fully open, and the siphon brake valve SBV is fully closed. First, the state transition in the case where the water level in the storage area has risen above the specified water level will be described with reference to FIG.

FIG. 3 is a state transition diagram when the water level in the storage area rises above the specified water level.
Assume a case where water level overshoot due to pump P stop delay or the like, or the occurrence of rainfall after the completion of water injection with the pump P. It is assumed that such a situation usually occurs.
(State C11) First, the water level in the storage area rises above the specified water level.

  (State C12) Next, water flows from the storage area to the water receiving tank T2 by siphon action.

  (State C13) Next, when the water level in the storage area decreases to the specified water level, the flowing water by the siphon action stops. At this time, both the storage area and the water receiving tank T2 return to the specified water level. This completes the fine adjustment of the water level in the storage area by siphon action.

  Subsequently, the state transition in the case where the water level in the storage area falls below the specified water level will be described with reference to FIG. FIG. 4 is a state transition diagram when the water level in the storage area falls below the specified water level. Assume that water leaks outside the storage area. Such a situation is an abnormal situation.

  (State C21) First, the water level in the storage area falls below the specified water level.

  (State C22) Next, water flows from the water receiving tank T2 to the storage area by siphon action. Thereafter, there are two states, state C23 and state C24.

  (State C23) When the water level in the storage area rises to the water level of the water receiving tank T2, flowing water by the siphon action stops. At this time, both the storage area and the water receiving tank T2 are below the specified water level.

  (State C24) When the water in the water receiving tank T2 becomes empty, flowing water due to the siphon action stops. At this time, the storage area is below the specified water level, and the water in the water receiving tank T2 is empty.

  (State C25) Thereafter, the pump P is operated manually or automatically so that both the storage area and the water receiving tank T2 are at the specified water level.

  Further, in the case of descending from the specified water level as shown in FIG. 4, the control device CON operates as shown in FIG. FIG. 5 is a flowchart showing an example of the operation of the control device CON.

  (Step S201) First, the control device CON determines whether or not the water level of the water receiving tank T2 is lower than a predetermined lower limit water level, using the measurement value of the water level detection unit WD. When the water level in the water receiving tank T2 does not fall below the lower limit water level, the control device CON stands by as it is.

  (Step S202) When it is determined in step S201 that the water level of the water receiving tank T2 is lower than the predetermined lower limit water level, the control device CON controls the alarm device AL so as to issue an alarm from the alarm device AL.

  As described above, the control device CON controls the notification device AL to notify when the water level detected by the water level detection unit WD falls below a predetermined lower limit water level or exceeds a predetermined upper limit water level. To do. Thereby, it is possible to notify the administrator of the pump system 1 of an abnormal water level drop.

  In the present embodiment, the other end of the siphon tube SP is immersed in the water in the water receiving tank T2, but may be immersed in outside water. Thereby, the water level of a storage area can be match | combined with the water level of external water.

  As mentioned above, the pump system 1 which concerns on 1st Embodiment is connected with the storage area which can isolate | separate from external water and can store water, the pump P which pumps water from external water, and the pump P is connected to the pump P. A discharge pipe DP for discharging the pumped water to the storage area, a discharge valve DV provided in the discharge pipe DP, one end connected to the discharge pipe DP in the storage area from the discharge valve DV, and the other end other than the storage area (here And a siphon tube SP immersed in the water of the water receiving tank T2). After the pump P is stopped, when the water level in the storage area rises beyond the water level other than the storage area in a state where the siphon pipe SP and the discharge pipe DP are filled with water, the water in the storage area is changed to the siphon pipe SP. It is discharged outside the storage area.

  Thereby, when the water level of a storage area rises, without operating the pump P, the water level of a storage area can be reduced without power, so that energy saving can be improved.

<Second Embodiment>
Next, a second embodiment will be described. In the pump system 1 according to the first embodiment, one end of the siphon pipe SP is connected to the discharge pipe DP in the storage area from the discharge valve DV. On the other hand, as shown in FIG. 6, in the pump system 2 according to the second embodiment, one end of the siphon pipe SP is immersed in water stored in the storage area. FIG. 6 is a schematic diagram of the pump system 2 according to the second embodiment. As shown in FIG. 6, the pump system 2 according to the second embodiment includes an electric motor M connected to the control device CON, a vacuum pump VP connected to a rotating shaft of the electric motor M, a vacuum pump VP, and a siphon tube. It further includes a connecting pipe IP for connecting the SP and an intake valve IV provided in the connecting pipe IP and connected to the control device CON. In this way, the vacuum pump VP is connected to the siphon pipe SP via the connection pipe IP.

  Due to the evacuation action of the vacuum pump VP, water is sucked up from one end of the siphon tube SP immersed in the water stored in the storage area, and the siphon tube SP is filled with water. Thus, the siphon tube SP is filled with water by driving the vacuum pump VP.

  Subsequently, the water injection operation by the pump operation will be described with reference to FIG. FIG. 7 is a flowchart showing an example of the water injection operation by the pump operation. As a premise, the following description will be made assuming that the discharge valve DV is fully closed, the intake valve IV is fully closed, the siphon valve SV is fully closed, and the siphon brake valve SBV is fully closed. Since steps S301 to S305 are the same as steps S101 to S105, description thereof is omitted.

  (Step S306) After step S305, the controller CON opens the intake valve IV from fully closed to fully open. Then, the control device CON controls the electric motor M to operate the vacuum pump VP.

  (Step S307) Next, it is detected whether or not the siphon tube is full. If the siphon tube is not full, wait.

  (Step S308) When it is detected in step S307 that the siphon tube is full, the control device CON closes the intake valve IV from full open to full close, controls the electric motor M, and stops the vacuum pump VP.

<Third Embodiment>
Next, a third embodiment will be described. FIG. 8 is a schematic diagram of the pump system 3 according to the third embodiment. As shown in FIG. 8, the pump system 3 according to the third embodiment is different from the pump system 1 according to the first embodiment in that a check valve RV2 is further provided in the siphon tube. ing. This stops the flow of water from the other end of the siphon pipe SP (water receiving tank T2 side) to one end of the siphon pipe SP (storage area side). Thereby, since water does not return from the water receiving tank T2 to the storage area, it is possible to prevent the fluctuation of the water level such as undulation from being transmitted to the water receiving tank T2. For this reason, disturbance of the water surface of the water receiving tank can be suppressed.

In each embodiment, the check valve RV is provided. However, the check valve RV is not limited, and a flap valve may be used. In some cases, the check valve RV or the flap valve may not be installed.
In addition, in each embodiment, although demonstrated with the example of the water injection pump which injects water from an external water to a storage area, it is applicable not only to this but the drainage pump which discharges water from a storage area to external water.

  For example, it may be configured as shown in FIG. FIG. 9 is a schematic diagram of a pump system 4 according to a modification of the first embodiment. Compared to FIG. 1, the pump system 4 according to the modification of the first embodiment shown in FIG. 9 further includes the following configuration. That is, the pump system 4 further includes a pump P3 that pumps water from the storage area, and a discharge pipe DP3 that is connected to the pump P3 and discharges the water pumped by the pump P3 to the outside water. Further, the pump system 4 includes a check valve RV3 that connects the pump P3 and the discharge pipe DP3 to prevent the backflow of water from the discharge pipe DP3 to the pump P3, and a discharge valve DV3 provided in the discharge pipe DP3. When the pump P3 is in operation, water is pumped from the storage area as shown by an arrow A5, and the pumped water passes through the pump P3 and the discharge pipe DP3 and is discharged from the discharge pipe DP3 to the outside water as shown by an arrow A6. The Since the check valve RV3 is added as necessary, the pump system 4 may not include the check valve RV3.

Further, the pump system 4 includes a water receiving tank T3 capable of storing water, a water level detecting unit WD3 for detecting the water level of the water receiving tank T3, one end connected to the discharge pipe DP on the storage area side from the discharge valve DV3, and the other end Includes a siphon tube SP that is immersed in the water in the water receiving tank T3. The water level detection unit WD3 may be a water level meter that directly measures the water level, or may determine the water level from an image captured by imaging the water receiving tank T3 with a camera.
Further, the pump system 4 includes a siphon valve SV3 provided in the siphon pipe SP3. Here, the siphon valve SV3 is an electric valve as an example, but may be a manual valve.

  Further, the pump system 4 includes a water surface height changing portion (water receiving tank outlet) WHC3 capable of changing the upper limit height of the water surface that can be stored in the water receiving tank T3. The water surface height changing part WHC3 according to the present embodiment is a weir G3 whose height is adjustable, which is installed on the side surface of the water receiving tank T3. The weir G3 may be a movable gate or a structure that can be increased or decreased (for example, a square member, a plate member, a pipe, or the like). The movable gate may be manual or electric. If the structure can be increased or decreased, the structure can be further stacked when the height is increased, and the structure can be dropped when the height is decreased.

  Next, the siphon action in the siphon pipe SP3 of the pump system 4 will be described. Water is stored in the water receiving tank T3 up to a specified water level. In addition, in a state where the siphon pipe SP3 and the discharge pipe DP3 are filled with water, the water moves between the storage area and the water receiving tank T3 so that the water level of the storage area and the water receiving tank T3 becomes the same by the siphon action. To do. For this reason, after the pump P3 is stopped, when the water level of the storage area rises above the specified water level (that is, the water level of the water receiving tank T3) in a state where the siphon pipe SP3 and the discharge pipe DP3 are filled with water, the storage area Water is discharged into the water receiving tank T3 through the siphon pipe SP3. Thereby, when the water level in the storage area rises, the water level in the storage area can be reduced without power without operating the pump P3, so that energy saving can be improved. Moreover, since the other end of the siphon pipe SP3 is surely immersed in the water in the water receiving tank T3 irrespective of the fluctuation of the water level of the outside water, the siphon action in the siphon pipe SP3 can be maintained.

  The specified water level according to this modification is the upper limit of the upper surface of the water surface that can be stored in the water receiving tank T2 and the water receiving tank T3, and the water that exceeds the upper surface of the water receiving tank T2 and the water receiving tank T3 It is discharged out of the water tank T3. As a result, when the water in the storage area is discharged to the water receiving tank T2 and the water receiving tank T3, and the water level exceeds the upper limit of the water surface that can be stored in the water receiving tank T2 and the water receiving tank T3, Is discharged out of the water receiving tank T2 and the water receiving tank T3. For this reason, since the water level of the water receiving tank T2 and the water receiving tank T3 is maintained at the upper limit of the water level that can be stored in the water receiving tank T2 and the water receiving tank T3, that is, the specified water level, the water level in the storage area becomes the specified water level. The water level continues to fall and the water level in the storage area returns to the specified water level. Therefore, even if the water level in the storage area rises temporarily, the water corresponding to the rising water level is discharged by the siphon action and returns to the specified water level, so that the stability of the water level adjustment in the storage area can be improved.

  Furthermore, in this modification, in the state where the siphon pipe SP and the discharge pipe DP are filled with water and the siphon pipe SP3 and the discharge pipe DP3 are filled with water, the water surface height changing unit WHC and the water surface height changing unit WHC3 can store the water. The specified water level is changed by changing the upper limit height of the water surface to another same height. Thereby, the water level which a storage area maintains can be changed.

  Furthermore, the pump system 4 according to this modification includes a water level detection unit WD3 that detects the water level of the water receiving tank T3. Thereby, since the water level of the storage area is maintained at the same water level as the water level of the water receiving tank T3 by siphon action, the water level of the storage area can be determined by measuring the water level of the water receiving tank T3. Since the water receiving tank T3 is installed separately from the storage area, it is possible to prevent undulations caused by disturbances such as wind, boat or canoe, and there is no influence of undulations in the storage area. The water level can be determined with high accuracy. Further, even when it is desired to raise the specified water level by a predetermined height (for example, several centimeters) smaller than the wave height (for example, several tens of centimeters), while looking at the highly accurate water level detected by the water level detection unit WD3 The weir G3 can be raised by a predetermined height.

  In addition, the storage area normally maintains the specified water level, but the water level may decrease from the specified water level due to the occurrence of water leakage from the storage area as indicated by the arrow A4 in FIG. In this case, after the pump is stopped, the water level in the storage area is changed between the receiving tank T2 and the receiving tank in a state where the siphon pipe SP and the discharge pipe DP are filled with water and the siphon pipe SP3 and the discharge pipe DP3 are filled with water. When descending below the water level in the water tank T3, the water in the water receiving tank T2 and the water receiving tank T3 is supplied to the storage area via the siphon pipe SP2 and the siphon pipe SP3, respectively. As a result, the water level in the storage area rises until it becomes the same as the water level in the water receiving tank T2 and the water receiving tank T3, so that the water level in the storage area can be recovered and water from both the water receiving tank T2 and the water receiving tank T3. Since it is supplied, the time required for water level recovery can be shortened compared to the first embodiment.

  As described above, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  1, 2, 3, 4: Pump system, T1: Bulkhead, WG: Water level gauge, P, P3: Pump, DP, DP3: Discharge pipe, RV, RV2, RV3: Check valve, DV: Discharge valve, T2 , T3: water receiving tank, WD, WD3: water level detection unit, SP, SP3: siphon tube, SV, SV3: siphon valve, SBV: siphon break valve, OC: switching device, CON: control device, AL: alarm, WHC , WHC3: water surface height changing section (water tank outlet), G: weir, M: electric motor, VP: vacuum pump, IP: connection pipe, IV: intake valve

Claims (5)

A partition that forms a storage area capable of storing water isolated from outside water; and
A pump for pumping water from outside water;
A discharge pipe connected to the pump and for discharging water pumped up by the pump to the storage area;
A discharge valve provided in the discharge pipe;
A siphon tube having one end connected to the discharge pipe on the side of the storage area from the discharge valve or immersed in water stored in the storage area, and the other end immersed in water other than the storage area;
With
After the pump is stopped, when the water level in the storage area rises above the water level other than the storage area with the siphon pipe and the discharge pipe filled with water, the water in the storage area A pump system that is discharged outside the storage area through the siphon tube. A water receiving tank in which water is stored up to a specified water level;
The other end of the siphon tube is immersed in the water in the water receiving tank,
After the pump is stopped, when the water level in the storage area rises above the specified water level in a state where the siphon pipe and the discharge pipe are filled with water, the water in the storage area passes through the siphon pipe. The pump system according to claim 1, wherein the pump system is discharged to the water receiving tank. The pump system according to claim 2, wherein the specified water level is an upper limit height of a water surface that can be stored in the water receiving tank, and water that exceeds the upper surface of the water receiving tank is discharged to the outside of the water receiving tank. A water surface height changing unit capable of changing the upper limit height of the water surface that can be stored in the water receiving tank;
The state in which the specified water level is changed by changing the upper limit height of the water surface that can be stored by the water surface height changing unit in a state where the siphon tube and the discharge tube are filled with water. The pump system described. The pump system according to claim 4, wherein the water surface height changing unit is a weir whose height is adjustable, which is installed on a side surface of the water receiving tank.