JP2009209684A - Vacuum pump unit and method of controlling vacuum pump unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum pump unit capable of priming by surely starting and stopping a vacuum pump. <P>SOLUTION: This vacuum pump unit comprises the vacuum pump 10 in which the suction side is connected to a part of the casing of the water pump 102 of a water supply device 100 through a priming pipe 15, a make-up water tank 20 having a float switch 29 for stopping the vacuum pump 10 at a reference level W, a vacuum pressure detector 18 installed in the priming pipe 15 and capable of detecting the pressure in the casing of the water pump 102, and a control panel 50 for operating the vacuum pump 10. When the vacuum pressure in the priming pipe 15 is lower than a predetermined vacuum pressure, the control panel 50 operates the vacuum pump 10 by electric signals from the vacuum pressure detector 18. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vacuum pump unit that performs exhalation and a method for controlling the vacuum pump unit, and more particularly to a device that can reliably start and stop a vacuum pump.

  At present, when using seawater for water work in an aquarium tank or a port, etc., a water supply device that uses a pump to pump well water is used. A pump used in such a water supply apparatus may be in a function stop state where water cannot be pumped even if the pump is operated when a gas such as air flows into the pump more than a certain amount. When such a pump has stopped functioning, the water-sealed vacuum pump is operated manually, and the pump's pump water is drawn by sucking the gas inside the intake pipe, which is the pump's suction pipe, or inside the pump. A method is known in which the pump is operated by filling the pump with water.

  Moreover, since the water-sealed vacuum pump is overloaded as compared with the normal exhaust operation when expiration is completed and the casing is filled with liquid, it is necessary to stop the water-sealed vacuum pump.

For this purpose, a detector such as a float switch or electrode is installed on the suction or discharge piping of the pump or the suction side of the water-sealed vacuum pump to detect the flow of gas or the falling or inflow of conductive seawater due to moisture. It is known to automatically start and stop a vacuum pump. Also, before the bubbles in the liquid flow into the suction port of the water supply device, a chamber space portion having a cross-sectional area larger than the cross-sectional area of the suction pipe is provided, and gas is separated into the chamber space portion and exhausted by a vacuum pump Is also known (see, for example, Patent Document 1).
JP 2003-193984 A

  The vacuum pump unit as described above has the following problems. That is, in the vacuum pump unit in which the detector such as the float switch is provided in the pipe as described above, the gas becomes a turbulent flow and flows through the pipe line during intake by the vacuum pump. Such a turbulent gas flow may cause malfunction of the detector. Further, since the seawater is pumped up, there is a possibility that foreign matter or the like adheres to the detector, or the corrosion of the detector may be corroded by the seawater, which may cause malfunction such as start / stop of the vacuum pump.

  In addition, the vacuum pump is started by providing a vacuum pressure (pressure) detector such as a vacuum switch in the suction pipe of the vacuum pump, and detecting the decrease in vacuum pressure, so that the pump can be started cheaply and easily. It was possible to do. However, when the expiration is completed, that is, when the instruction to stop the vacuum pump is determined by the vacuum pressure, the vacuum pressure changes depending on the installation position of the water supply device and the vacuum pump, etc., and malfunctions such as continuous operation and stop occur. There was a fear.

  Furthermore, since the sealed water flows into the exhaust (discharge) piping from the water-sealed vacuum pump even during exhaust, it is difficult to distinguish between the exhaust operation and the operation when the expiration is completed. There was also a problem that it was difficult to detect what was done.

  For this reason, a method of detecting the presence or absence of seawater in the pipe in a non-contact manner using a capacitive proximity sensor is also known, but pipe installation and sensitivity adjustment are required during construction, Manufacturing cost increased.

  Therefore, the present invention provides a vacuum pump unit and a method for controlling the vacuum pump unit that can detect the end of exhalation reliably and start and stop the vacuum pump even if a float switch is used. It is an object.

  In order to solve the problems and achieve the object, the vacuum pump unit and the control method of the vacuum pump unit of the present invention are configured as follows.

  The vacuum pump unit is provided between a vacuum pump that performs exhalation by sucking gas in a water intake pipe of the water supply pump, and between the water supply pump and the vacuum pump, and a reverse flow of fluid from the vacuum pump to the water supply pump A non-return valve, a pressure detection unit that is provided between the water supply pump and the check valve, and that detects a pressure between the water supply pump and the check valve; and Connected to the discharge side, a replenishing water tank capable of storing water therein, a water level detector for detecting the water level inside the replenishing water tank, and connected to the vacuum pump, the pressure detector and the water level detector When the pressure detected by the pressure detector is higher than a predetermined pressure, the vacuum pump is operated and the water level detected by the water level detector is higher than a predetermined reference water level. Expediently, characterized in that it comprises a control unit for stopping the operation of the vacuum pump.

  The method of controlling the vacuum pump unit includes a step of detecting a pressure in the feed water pump by a pressure detector provided between the feed water pump and the vacuum pump, and a pressure detected by the pressure detector is determined from a predetermined pressure. If it is too high, the vacuum pump sucks the gas in the water supply pump and performs exhalation, and the gas is allowed to flow into the make-up water tank, and is provided on the wall of the make-up water tank. A step of closing an electromagnetic valve that opens and closes a drain outlet provided to drain water up to a predetermined level below a reference water level when the pressure detected by the pressure detector is higher than a predetermined pressure; and Expiration of the water supply pump is terminated, and the vacuum pump sucks the water in the water supply pump and flows the water into the makeup water tank, and the water level in the makeup water tank is A step of detecting whether or not the reference water level has been reached by a water level detector, and when the water level detector detects that the water level in the makeup water tank is the reference water level, the operation of the vacuum pump is stopped. And opening the electromagnetic valve.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the control method of the vacuum pump unit which can perform expiration water by starting and stopping a vacuum pump reliably, and a vacuum pump unit.

  Hereinafter, the vacuum pump unit 1 according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory diagram showing a configuration of the vacuum pump unit 1, FIG. 2 is an explanatory diagram showing a control circuit used in the vacuum pump unit 1, and FIG. 3 is a flowchart showing an example of a control operation of the vacuum pump unit 1. is there. 1 to 3, D indicates the sea (water source), E indicates the flow direction of pumping water, F indicates the flow direction of gas and water, S indicates the signal line, and W indicates the predetermined water level.

  As shown in FIG. 1, the vacuum pump unit 1 has a vacuum pump 10, a vacuum pump 10 fixed to the upper portion thereof, a replenishing water tank 20 in which tap water is stored inside, and a control panel that controls the vacuum pump 10 ( Control unit) 50, and is connected to a water supply apparatus 100 that pumps seawater.

  Here, the water supply apparatus 100 is extended to the sea (sea D), such as offshore, as a water source, and is connected to a suction pipe (water intake pipe) 101 for sucking seawater and the suction pipe 101, and a motor or the like. And a discharge pipe 104 connected to the pump 102 via a check valve 103 for pumping seawater and discharging it to the downstream (for example, an aquarium tank). Note that various pumps may be used as the pumping pump 102 as long as a predetermined amount of water can be pumped. For example, a multistage pump using a turbine pump or an impeller, or a piston pump may be used. Moreover, the suction pipe line 101 is a water intake pipe, and a hose or the like may be connected from the sea to a certain distance (to the middle part).

  For example, a water-sealed vacuum pump is used as the vacuum pump 10, and has a motor 11 that is turned on and off and operated. The motor 11 is connected to the control panel 50 via a signal line S. The vacuum pump 10 seals a suction flange 12 provided on the suction side for sucking gas and liquid, a discharge flange 13 for discharging gas and liquid, and a case of the vacuum pump 10 and a compression part such as a blade by a water film. And a sealing port 14 for sucking the sealing water for the purpose.

  Further, the suction side of the vacuum pump 10 is connected to a part of the casing of the pumping pump 102, for example, the uppermost part or the suction pipe 101, and the priming pipe for exhausting the gas in the pumping pump 102 at the time of priming. The suction flange 12 is connected to 15 via a check valve 16. The check valve 16 may be built in the suction flange 12 of the vacuum pump 10. Further, the discharge flange 13 of the vacuum pump 10 is connected to the replenishing water tank 20 via the discharge pipe 17.

  Here, as long as the pump can draw water into the pumping pump 102, the pumping pump 102 or the suction pipe 101 may be connected to the suction side of the vacuum pump 10. Hereinafter, a description will be given of a configuration in which the suction side of the vacuum pump 10 is connected to the uppermost part of the pumping pump 102.

  The expiratory water pipe 15 includes a pressure detector such as a vacuum switch (hereinafter referred to as “vacuum pressure detection”) that can electrically detect the vacuum pressure (pressure) in the expelled water pipe 15 between the pumping pump 102 and the check valve 16. Device ") 18 is provided. This vacuum pressure detector 18 is connected to the control panel 50 via a signal line S, and when the vacuum pressure of the priming pipe 15 is lower than a predetermined vacuum pressure (the pressure of the priming pipe 15 is predetermined). In the case where the pressure is higher than the pressure of the first pressure), or when the atmospheric pressure is reached, the information is transmitted to the control panel 50 as an electrical signal. Here, the predetermined vacuum pressure is a pressure that is a negative pressure from the atmospheric pressure and does not require expiratory water. When the vacuum pressure is lower than the predetermined vacuum pressure, the atmospheric pressure or the vacuum pump This is the pressure that requires expiratory water due to factors such as the installation position of 10 and the falling water.

  The replenishing water tank 20 includes a tank part 21 in which less corrosive water such as tap water or pure water (hereinafter referred to as “tap water”) is stored, and a lid 22 that covers the upper part of the tank part 21. A partition plate 23 is provided that partitions the inside of the tank portion 21 and is provided from the upper end to the middle of the tank portion 21 toward the lower end. That is, the tank part 21 is the upper part by the partition plate, and at least the water surface is partitioned, and the lower part is continuous.

  The replenishing water tank 20 has a ball tap 24, a drain port 25, an electromagnetic valve 26 provided at the drain port 25, and a seal that feeds the sealed water to the vacuum pump 10 on one side separated by the partition plate 23 of the tank unit 21. A water tube 27 is provided.

  Further, on the other side of the tank section 21 separated by the partition plate 23, a water level meter 28 that can visually check the water level of the stored tap water, a float switch (water level detector) 29, and a lower end of the tank section 21. A drain 30 provided on the side, and a manually opened and closed valve 31 provided on the drain 30 are provided.

  The tank portion 21 is, for example, a rectangular parallelepiped and has an opening at the top, and is formed by processing a material that prevents corrosion due to seawater, water, or the like, or a protective film. In addition, the wall surface of the tank portion 21 has a plurality of openings to which each component such as the drain port 25 and the sealing tube 27 can be connected, and is appropriately formed so that each component can be connected. In addition, the opening provided in the wall surface of the tank part 21 is formed so that obstruction | occlusion is possible. Furthermore, tap water or the like is formed in the tank portion 21 so that it can flow in. When the water level of the tank portion 21 is below a certain level, tap water flows in and when the water level becomes above a certain level, The inflow of water can be stopped.

  The vacuum pump 10 is fixed to the upper portion of the lid body 22 via a fixing base 32. Further, the lid 22 has a connecting portion 33 formed so that the discharge pipe 17 can be connected thereto, a discharge pipe 34 provided on the inner surface side of the lid 22 and connected to the connecting portion 33, and a tip of the discharge pipe 34. And a muffler filter 35 provided in.

  The partition plate 23 is formed such that the main surface has a length in the height direction shorter than the inner wall height of the tank portion 21, and the width direction length is substantially the same as the width of the tank portion 21. It fixes so that the upper end of the tank part 21 and the upper end of the partition plate 23 may become a substantially the same position (surface position). For this reason, when the partition plate 23 is fixed to the tank part 21, the tank part 21 is divided (partitioned) into two parts above the tank part 21, and the lower end of the partition plate 23 is opened. And the tank part 21 will continue from the lower end of the partition plate 23 below.

  The ball tap 24 is formed so as to be able to stop the inflow of tap water by closing a built-in valve when the water inside the tank portion 21 becomes a certain level or more. Moreover, when the water level of the tank part 21 becomes below a certain level, the built-in valve is opened, and the tap water is allowed to flow again, so that the tap water can be turned on and off.

  The drain port 25 is provided on the wall surface of the tank portion 21 so that the lower end of the inner periphery thereof is disposed below the reference water level W. Here, the reference water level W refers to a water level (water level increased by the completion of exhalation by the vacuum pump 10 from the level of tap water stored in the replenishing water tank 20 in advance and seawater flows in through the vacuum pump 10 ( Line). For this reason, the constant water level related to ON / OFF of the inflow of tap water is set to a water level lower than the reference water level W, thereby making it possible to determine the inflow of seawater accompanying the completion of expiration.

  In addition, the drain port 25 is provided with an electromagnetic valve (solenoid valve) 26 that opens and closes the drain port 25 according to an instruction from the control panel 50. The solenoid valve 26 is connected to the control panel 50 via the signal line S, and is normally opened (always), and is closed when an instruction (for example, application of a predetermined voltage) is issued from the signal line S. It becomes.

  The sealed water tube 27 is provided at the lower end of the tank part 21, and the upper part thereof is connected to the suction flange 12 so that a predetermined amount of sealed water is sucked into the vacuum pump 10 when the vacuum pump 10 is operated. Is formed.

  The water level meter 28 is, for example, a water level meter 28 in which a float is provided inside a glass tube, and the position of the float is provided on the wall portion of the tank portion 21 so as to be visible from the outside.

  The float switch 29 is provided on the lid so that the water level information can be transmitted to the control panel 50 by turning on (or turning off) the switch when the water level inside the tank unit 21 exceeds the reference water level W. And connected to the control panel 50 via a signal line S.

  The drain 30 is provided in the lower end part of the tank part 21, and is formed so that the water stored in the tank part 21 can be discharged | emitted outside. In addition, an open / close valve 31 capable of manually opening and closing the drain 30 is provided in the pipe line of the drain 30, and water can be discharged from the drain 30 by opening the open / close valve 31. Normally, the drain 30 is closed by an on-off valve 31, and is opened by the on-off valve 31, for example, during maintenance of the replenishing water tank 20, and the water in the tank section 21 is forcibly drained.

  The fixing base 32 is formed so as to be connectable to the lid body 22 with a bolt or the like, for example, and is formed integrally with the vacuum pump 10 or formed so as to be connectable with a bolt. The connection part 33 is, for example, a pipe joint or the like, and is connected to the discharge pipe 17 and the discharge pipe 34. Further, the discharge pipe 34 is formed by the same pipe as the discharge pipe 17.

  The muffler filter 35 is designed to reduce the bubbles when the gas passes through the muffler filter 35, thereby obtaining a muffler effect at the time of gas discharge, and by reducing the discharge speed, It is formed to prevent waves as much as possible. Even if it is not possible to prevent undulations, it is only necessary to have a silencing effect.

  As shown in FIG. 2, the control panel 50 can receive information about the power source 51 for supplying power from the outside, the vacuum pressure detector 18 and the float switch 29 via the signal line S, and based on this information. And a control circuit unit 52 formed so as to be able to control the vacuum pump 10 and the electromagnetic valve 26. In addition, the control panel 50, for example, when the water level is below (or above) a certain level from the ball tap 24 and tap water flows (or stops), the signal is transmitted via the signal line S, so An informing means (for example, using an LED or the like) capable of informing information on the inflow of water may be provided.

  The power supply unit 51 is formed so as to be able to supply power to each component of the vacuum pump unit 1 (for example, the motor 11 and the control circuit unit 52). In FIG. 2, the power supply unit 51 is shown as an AC power supply, but it may be a DC power supply instead of an AC power supply, and can be set as appropriate depending on the configuration of each circuit.

  As shown in FIG. 2, the control circuit unit 52 includes a control output circuit 53 that performs control based on the detection result of the vacuum pressure detector 18, an operation switching circuit 54 that switches start / stop of the operation of the vacuum pump 10, and an electromagnetic valve An electromagnetic valve opening / closing circuit 55 for switching the opening / closing of the signal output circuit 26, and a signal inverting circuit 56 for inverting the control signal of the control output circuit 53. The control circuit unit 52 is connected to the power supply unit 51, and a control output circuit 53, an operation switching circuit 54, a solenoid valve opening / closing circuit 55, and a signal inversion circuit 56 are connected in parallel.

  The control output circuit 53 includes a first switch (hereinafter “SW”) 61, a control output unit 62 that sends an instruction to each SW described later, a second SW 63, and a third SW 64. In the control output circuit 53, the second SW 63 and the third SW 64 are connected in series, and the first SW 61 and the second and third SW 63, 64 are connected in parallel. In addition, a control output unit 62 is connected in series downstream of the junction of the first SW 61 and the second and third SWs 63 and 63 connected in parallel.

The first SW 61 is connected to the vacuum pressure detector 18 and is configured to be switched on / off based on information transmitted from the vacuum pressure detector 18. More specifically, the first SW 61 is turned on when the vacuum pressure detector 18 receives a signal for detecting a vacuum pressure lower than a predetermined vacuum pressure, and the first SW 61 and the control output unit 62 are energized. That is, the first SW 61 is turned off in a predetermined vacuum pressure state to cut off the circuit and is turned on by a signal from the vacuum pressure detector 18 so that the control output circuit 53 can be energized. The vacuum pressure detector 18 does not transmit an electrical signal at a predetermined vacuum pressure, and if the electrical signal does not flow, the first SW 61 may be turned off. The control output unit 62 is energized. It is formed so that a switching instruction can be given so as to turn on the second SW 63 and a fourth SW 65 and a fifth SW 67 described later.

  The second SW 63 is configured to be switched ON / OFF according to an instruction from the control output unit 62. More specifically, when the control output unit 62 is energized, the second SW 63 is turned on to energize the circuit, and when the control output unit 62 is interrupted, the second SW 63 is turned off, and the second SW 63 is turned on. Blocked.

  The third SW 64 is configured to be switched ON / OFF according to an instruction from a signal inverting circuit 56 described later. More specifically, the third SW 64 is always ON. When the second SW 63 is ON, the circuit is energized. When the signal inversion circuit 56 is energized, the third SW 64 is OFF and the circuit is shut off. To do.

  The operation switching circuit 54 includes a fourth SW 65 and a motor operation instruction unit 66, and the fourth SW 65 and the motor operation instruction unit 66 are connected in series. The fourth SW 65 is always OFF, and is turned ON when the control output unit 62 is energized, and the operation switching circuit 54 is energized. When the operation switching circuit 54 is energized, the motor operation instruction unit 66 is configured to drive the motor 11 and drive the vacuum pump 10 by causing a current to flow through the motor 11 (or giving an operation instruction).

  The electromagnetic valve opening / closing circuit 55 includes a fifth SW 67 and an opening / closing instruction unit 68, and the fifth SW 67 and the opening / closing instruction unit 68 are connected in series. The fifth SW 67 is always OFF and is ON when the control output unit 62 is energized, and the solenoid valve opening / closing circuit 55 is energized. The open / close instruction unit 68 is configured to be able to close (close) the drain port 25 by switching the electromagnetic valve 26 to the closed state when the electromagnetic valve open / close circuit 55 is energized. The open / close instruction unit 68 is configured to be able to apply a voltage to the solenoid valve 26 to close the solenoid valve 26 by applying (energizing) the operating voltage of the solenoid valve 26 to the solenoid valve 26.

  The signal inversion circuit 56 includes a sixth SW 69 and an inversion instruction unit 70, and the sixth SW 69 and the inversion instruction unit 70 are connected in series. The sixth SW 69 is always OFF, and is turned ON when there is an instruction from the float switch 29, and the signal inversion circuit 56 is energized. The inversion instruction unit 70 is configured to be able to switch the third SW 64 to OFF when the signal inversion circuit 56 is energized.

The vacuum pump unit 1 configured as described above will first describe the basic operation of performing the exhalation of the water supply apparatus 100.
First, power is supplied to the water supply apparatus 100 and power is also supplied to the vacuum pump unit 1. In this state, the vacuum pressure at the uppermost end of the casing of the pumping pump 102 is detected by the vacuum pressure detector 18 via the expiratory water pipe 15. When the vacuum pressure detected by the vacuum pressure detector 18 is equal to or higher than the predetermined vacuum pressure, the pumping pump 102 of the water supply apparatus 100 is operated.

  When the pressure is equal to or lower than a predetermined vacuum pressure (a predetermined vacuum pressure or a vacuum pressure higher than the predetermined vacuum pressure), since the atmospheric pressure is higher than the pressure in the pumping pump 102, the seawater is indicated by an arrow E. As described above, the suction pump 101 is sucked up to the pumping pump 102, and is pumped up and discharged from the discharge pipe 104 by the operation of the pumping pump 102.

  When the vacuum pressure detected by the vacuum pressure detector 18 is lower than a predetermined vacuum pressure or equal to the atmospheric pressure due to the fall of seawater in the pump 102 or accumulation of gas contained in the seawater. The vacuum pressure detector 18 generates this information as an electrical signal. When the control panel 50 receives this electrical signal via the signal line S, the control panel 50 activates the motor 11 and drives the vacuum pump 10.

  This is because when the vacuum pressure detected by the vacuum pressure detector 18 is lower than a predetermined vacuum pressure, there is a high possibility that water in the pumping pump 102 has fallen, and the pumping pump 102 has a gas inside. Exists. Even if the pumping pump 102 is operated in this state, the pumping pump 102 is only operated and no pumping is performed, that is, the pumping function is stopped.

  Here, when the vacuum pump 10 is driven (operated) by an electrical signal from the vacuum pressure detector 18, the vacuum pump 10 draws in gas from the expiratory pipe 15, thereby reducing the pressure in the pump 120, Negative pressure (vacuum) rather than atmospheric pressure. That is, the vacuum pressure in the pumping pump 102 is set higher than a predetermined vacuum pressure.

  As shown by an arrow F, the gas sucked in by the vacuum pump 10 passes from the discharge pipe 17 connected to the discharge flange 13 to the inside of the tank section 21 via the connection portion 33 of the lid body 22, the discharge pipe 34, and the muffler filter 35. Move to.

  Thus, by sucking the gas in the pumping pump 102, the pumping pump 102 has a predetermined vacuum pressure, and the pumping pump 102 has a predetermined vacuum pressure (the pressure is more negative than the atmospheric pressure). For this reason, the pumping pump 102 is filled with seawater. When the pumping pump 102 is driven in this state, the pumping pump 102 pumps seawater downstream of the discharge pipe 104 as indicated by an arrow F.

  Even when the inside of the pumping pump 102 is set to a predetermined vacuum pressure, the seawater in the pumping pump 102 flows into the vacuum pump 10 because the vacuum pump 10 is driven. For this reason, when the inside of the pumping pump 102 (exhalation piping 15) becomes a predetermined vacuum pressure and seawater is pumped by the pumping pump 102, the driving of the vacuum pump 10 is stopped. Control operation is performed.

  Even if the driving of the vacuum pump 10 is stopped, the check valve 16 does not cause the gas and water (seawater and sealed water) in the vacuum pump 10 to flow back to the pumping pump 102. Thereby, there is no water fall of the pumping pump 102 by the reverse flow of the gas in the vacuum pump 10.

  When pumping of the vacuum pump 10 is stopped and the pumping pump 102 stops pumping water due to falling water or gas filling, etc., control is performed to drive the vacuum pump 10 again and perform priming. Driving is performed.

  Next, as a control method of the vacuum pump unit 1, an example of the control operation of the vacuum pump unit 1 will be described with reference to the flowchart of FIG.

  First, electric power is supplied to the water supply apparatus 100 and the vacuum pump unit 1 (step ST1), so that the vacuum pressure of the priming pipe 15 is detected by the vacuum pressure detector 18 before the pumping pump 102 is operated (step ST2). ).

  At this time, if the vacuum pressure of the priming pipe 15 is a predetermined vacuum pressure or higher than a predetermined vacuum pressure (below the predetermined pressure) (YES in step ST3), seawater is pumped into the pumping pump 102. Is full, seawater is pumped by the pumping pump 102. At this time, the vacuum pressure detector 18 transmits an electrical signal of a predetermined vacuum pressure of the priming pipe 15 to the first SW 61 via the signal line S. The first SW 61 is turned off based on this signal, and the control output circuit 53 is shut off. Since the control output circuit 53 is not energized (cut off) at a predetermined vacuum pressure, the control output unit 62 does not transmit an electrical signal to the second, fourth, and fifth SWs 63, 65, and 67. , Fourth and fifth SW 63, 65, 67 are also turned off.

  That is, since the operation switching circuit 54 and the electromagnetic valve opening / closing circuit 55 are cut off, the motor 11 is maintained in a stopped state and the electromagnetic valve 26 is open. By continuing to drive the pumping pump 102 in this state, it becomes possible to pump seawater from the discharge pipe 104 (water supply) with the vacuum pump 10 stopped.

  Next, when the vacuum pressure detected by the vacuum pressure detector 18 is lower than a predetermined vacuum pressure (for example, atmospheric pressure) (NO in step ST3), the vacuum pressure detector 18 sends an electric signal to the first SW 61. Send. When the first SW 61 receives this electrical signal, the first SW 61 switches from OFF to ON, and the control output circuit 53 is energized. When the control output circuit 53 is energized, the control output unit 62 transmits an electrical signal to the second, fourth, and fifth SWs 63, 65, and 67, and the second, fourth, and fifth SWs 63, 65, and 67 are also turned on. Switch. Thereby, the operation switching circuit 54 and the solenoid valve opening / closing circuit 55 are energized.

  First, when the operation switching circuit 54 is energized, the motor operation instruction unit 66 gives an operation instruction to the motor 11. For example, the operation instruction of the motor operation instruction unit 66 is to operate the motor 11 by causing the rated current to flow through the motor 11. The vacuum pump 10 is driven by the motor 11 (step ST4). By driving the vacuum pump 10, water moves from the sealing tube 27 to the vacuum pump 10, and a water film that forms a seal of the vacuum pump 10 is formed on the sliding portion of the vacuum pump 10.

  Further, when the electromagnetic valve opening / closing circuit 55 is energized, a predetermined voltage is supplied from the opening / closing instruction unit 68 to the electromagnetic valve 26, the electromagnetic valve 26 is closed, and the drain port 25 is closed.

  In this manner, the vacuum pump 10 is driven in a state where the drain port 25 is closed, and the gas in the casing of the pumping pump 102 is sucked from the priming pipe 15. The gas sucked in by the vacuum pump 10 is discharged from the inside of the vacuum pump 10 into the tap water stored in the tank portion 21 through the discharge pipe 17, the connection portion 33, the discharge pipe 34 and the sound deadening filter 35 as indicated by an arrow F. Is done. Thus, the gas discharged into the tap water stored in the tank unit 21 is separated into the tap water and the gas in the makeup water tank 20. At this time, the sealed water that has flowed into the vacuum pump 10 from the sealed tube 27 together with the gas also moves to the tank portion 21 again.

  When all the gas in the casing of the pumping pump 102 is sucked by the vacuum pump 10, the vacuum pressure inside the pumping pump 102 becomes a predetermined vacuum pressure. Since the vacuum pressure in the pumping pump 102 is lower than the atmospheric pressure, seawater enters the pumping pump 102 and water is discharged (pumped) by driving the pumping pump 102. Thus, when the vacuum pump 10 is driven in a state where the pumping pump 102 is filled with seawater, the seawater is sucked in by the vacuum pump 10. The seawater sucked by the vacuum pump 10 is discharged into the tap water stored in the tank portion 21 through the discharge pipe 17, the connection portion 33, the discharge tube 34, and the muffler filter 35, similarly to the gas.

  Further, the vacuum pressure detector 18 detects that the predetermined vacuum pressure has been reached, and transmits an electrical signal indicating that the predetermined vacuum pressure has been reached to the first SW 61. When the first SW 61 receives this electrical signal, the first SW 61 is turned OFF, and the circuit between the first SW 61 and the control output unit 62 of the control output circuit 53 is cut off. Since the second SW 63 and the third SW 64 are turned on, the control output circuit 53 is energized, and the control output unit 62 keeps the second, fourth, and fifth SWs 63, 65, and 67 on.

  Thus, since seawater is discharged to tap water, the water level in the makeup water tank 20 rises. Along with this rise, the ball tap 24 also rises. When the water level of the make-up water tank 20 rises above a certain level, the inflow of tap water is stopped by the ball tap 24. In addition, the structure which the inflow of tap water stops with the ball tap 24 before seawater flows in may be sufficient.

  Next, when the water level of the replenishing water tank 20 reaches the reference water level W by seawater (YES in step ST5), electrical signals are transmitted from the float switch 29 to the control panel 50, respectively. When the sixth SW 69 receives an electrical signal from the float switch 29, the sixth SW 69 is switched from OFF to ON, and the signal inversion circuit 56 is energized. When the signal inversion circuit 56 is energized, the inversion instruction unit 70 transmits an electrical signal to the third SW 65 and switches the third SW 65 from ON to OFF.

  When the third SW 65 is turned OFF, the circuit of the control output circuit 53 with the third SW 64 and the control output unit 62 is cut off. Further, since the vacuum pressure detector 18 recognizes the predetermined vacuum pressure, the first SW 61 is OFF and the control output circuit 53 is shut off. For this reason, since the control output unit 62 does not output an electrical signal, the second, fourth, and fifth SWs 63, 65, and 67 are switched off.

  Thereby, the operation switching circuit 54 and the electromagnetic valve opening / closing circuit 55 are shut off, the vacuum pump 10 is stopped (step ST6), and the electromagnetic valve 26 is opened (step ST7). When the vacuum pump 10 is stopped, the seawater does not enter the replenishing water tank 20, and the water above the drain port 25 is drained from the drain port 25. In addition, the water level of the makeup water tank 20 is positioned lower than the reference water level W by draining water from the drain port 25. As a result, an electrical signal indicating that the water level is lower than the reference water level W is transmitted from the float switch 29 to the control panel 50. At this time, if the water level is below a certain level, tap water is introduced by the ball tap 24.

  With this signal, the sixth SW 69 is switched OFF, the signal inversion circuit 56 is shut off, and the vacuum pump 10 remains stopped. In this state, the pumping pump 102 is operated, and seawater is supplied (pumped) by the pumping pump 102. The pumping pump 102 may be operated after the vacuum pump 10 is stopped (step ST6) and before the electromagnetic valve 26 is opened (step ST7).

  Even when the vacuum pump 10 is driven, when the water level of the makeup water tank 20 does not reach the reference water level W due to seawater (NO in step ST5), the water level of the makeup water tank 20 reaches the reference water level W. Until then, the vacuum pump 10 is driven.

  For example, in step ST4, when seawater once flows into the replenishing water tank 20 by the vacuum pump 10, the tap water continues to flow into the replenishing water tank 20 for a predetermined time and flows in via the vacuum pump 10. Dilute seawater. When the water level of the make-up water tank 20 reaches the height of the drain port 25 by this dilution, the water in which the seawater is diluted is drained, and the water in the make-up water tank 20 is replaced with non-corrosive tap water. To do. This control may not be performed.

  As described above, according to the vacuum pump unit 1 of the present invention, the vacuum pump 10 can be operated by the vacuum pressure in the pumping pump 102 to reliably perform the exhalation. In addition, the vacuum pump 10 can be surely stopped by detecting the reference water level W with the float switch 29 after the expiration.

  In addition, since the partition plate 23 is provided between the discharge switch 34 and the muffler filter 35, which are gas and seawater discharge ports provided in the makeup water tank 20, and the float switch 29, the gas and seawater are discharged. It is possible to cause the water surface to collide with the partition plate 23. Thereby, it is possible to prevent the water surface on the float switch 29 side continuous below the partition plate 23 from being rippled as much as possible, and to prevent malfunction due to the ripple of the float switch 29. As a result, the reference water level W can be accurately detected, and the gas can be reliably removed from the pumping pump 102.

  In addition, when the seawater sucked from the vacuum pump 10 contains foreign matter, the sedimentary foreign matter settles in the replenishment water tank 20 even if the foreign matter enters the replenishment water tank 20 from the vacuum pump 10. At the same time, the floating foreign matter is discharged from the drain port 25. In addition, such floating foreign matter is restricted in movement by the partition plate 23 and floats on the water surface on the side where the ball tap 24 is provided. That is, foreign matter does not enter the water surface of the makeup water tank 20 on the side where the float switch 29 is provided, and it is possible to prevent malfunction of the float switch 29 due to foreign matter. Thereby, the reliability of the operation of the vacuum pump 10 can be improved. Here, even if the ball tap 24 malfunctions, the inflow of seawater can be reliably detected by the float switch 29 because the inflow of tap water only stops.

  Moreover, even if seawater enters, the water in the replenishing water tank 20 is diluted with tap water and drained from the drain port 25. For this reason, the tap water mixed with seawater is eventually replaced with tap water, and the components of the float switch 29 and the makeup tank 20 can be prevented from being corroded by the seawater. As a result, malfunction due to corrosion or the like is prevented, the number of maintenance operations is reduced, and maintenance performance and maintenance costs are also reduced.

  Furthermore, when the vacuum pump 10 is stopped, the electromagnetic valve 26 of the drain port 25 provided below the reference water level W is opened to allow drainage, so that the water level of the replenishing water tank 20 can be reliably set from the reference water level W. Can also be lowered. That is, by setting the water level of the make-up water tank 20 below the reference water level W, it is possible to reliably reset the water level in the make-up water tank 20, and to reliably detect the end of expiration at the next pumping. Is possible.

  As described above, according to the vacuum pump unit 1, the float switch 29 is arranged on the other side (position) continuous only below from the one provided with the discharge pipe 34 of the tank portion 21 partitioned by the partition plate 23. As a result, malfunction of the float switch 29 can be prevented. Further, by controlling the operation of the vacuum pump 10 with the float switch 29 capable of preventing malfunction, it is possible to prevent malfunction of the vacuum pump 10 and to improve the reliability of the operation of the vacuum pump unit 1. .

  Moreover, even if seawater enters the replenishing water tank 20, when the water surface is positioned above the drainage port 25 after being diluted with tap water, each component of the seawater is drained from the drainage port 25. It is possible to prevent the product from corroding and to prevent malfunction of the vacuum pump 10 due to the corrosion.

  For this reason, it is possible to reliably perform the exhalation with the vacuum pump 10 and stop the vacuum pump 10 at the end of the exhalation without fail, thereby preventing unnecessary operation of the vacuum pump 10 and saving energy. Is also possible.

  Further, by using such a vacuum pump unit 1 for the water supply device 100, the water can be reliably discharged, so that the pumping efficiency of the water supply device 100 is improved, and the pumping pump 102 is prevented from operating idle. Can be made possible.

  The present invention is not limited to the above embodiment. For example, the above-described vacuum pump unit 1 has been described as being used in the water supply device 100 that pumps seawater. For example, the vacuum pump unit 1 is used in a device that supplies liquid that frequently requires expiratory water, such as natural firing water or hot springs. Also good. Moreover, you may use for the water supply apparatus used for a lake, a swamp, etc. When supplying water of various water quality (including hot water), the vacuum pump unit 1 detects the vacuum pressure and reliably performs exhalation to prevent deterioration (and stop) of the function of the pumping pump 102 due to gas as much as possible. As a result, the operating efficiency of the pumping pump 102 can be improved.

  Further, the partition plate 23 of the vacuum pump unit 1 described above partitions the tank part 21 with the water surface, and the length in the height direction of the main surface is formed shorter than the height of the inner wall of the tank part 21. The length in the height direction of the main surface may be the same as the inner wall height of the tank portion 21. In the case of the partition plate 23 having such a shape, mesh holes and openings may be provided on the main surface located on the bottom side of the tank portion 21 so as to be continuous. By using such a partition plate, movement of foreign matter in seawater is prevented as much as possible.

  In the vacuum pump unit 1 described above, the makeup water tank 20 has two drain ports 25 and a drain 30, but a configuration in which a discharge port having an electromagnetic valve is further provided below the drain port 25. It is good. The manual on-off valve 31 provided in the drain 30 is used in the event of an emergency such as a failure of the vacuum pump 10 or the maintenance of the replenishing water tank 20, but the operator moves to the replenishing water tank 20 and opens and closes it. There must be. However, as one of the operational controls, forcibly when a drainage port 25 having an electromagnetic valve 26 does not stop even if the vacuum pump 10 is instructed to stop, or when the drainage port 25 is clogged with foreign matter, etc. By incorporating the control to open the solenoid valve of the discharge port, it is possible to prevent the water in the makeup water tank 20 from overflowing. In addition, various modifications can be made without departing from the scope of the present invention.

Explanatory drawing which shows the structure of the vacuum pump unit which concerns on the 1st Embodiment of this invention. Explanatory drawing which shows the structure of the control panel used for the vacuum pump unit. The flowchart which shows an example of the control driving | operation of the vacuum pump unit.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vacuum pump unit, 10 ... Vacuum pump, 11 ... Motor, 12 ... Suction flange, 13 ... Discharge flange, 14 ... Seal port, 15 ... Expiratory piping, 16 ... Check valve, 17 ... Discharge piping, 18 ... Vacuum Pressure detector (pressure detector), 20 ... replenishing water tank, 21 ... tank section, 22 ... lid, 23 ... partition plate, 24 ... ball tap, 25 ... drain port, 26 ... solenoid valve, 27 ... sealed tube, 29 ... Float switch (water level detector), 30 ... Drain, 31 ... Open / close valve, 32 ... Fixed base, 33 ... Connector, 34 ... Discharge pipe, 35 ... Sound filter, 50 ... Control panel (control part), 51 ... Power supply , 52 ... Control circuit part, 53 ... Control output circuit, 54 ... Operation switching circuit, 55 ... Electromagnetic valve switching circuit, 56 ... Signal inversion circuit, 61 ... First SW, 62 ... Control output part, 63 ... Second SW, 64 ... 3rd SW, 65 ... 4th SW, 66 ... 67 ... 5th SW, 68 ... Opening / closing instructing unit, 69 ... 6th SW, 70 ... Reversing instructing unit, 100 ... Water supply device, 101 ... Suction pipe (intake pipe) path, 102 ... Pumping pump, 103 ... Check valve, 104 ... discharge pipe, D ... sea (water source), E ... flow direction of pumping water, F ... flow direction of gas and water, S ... signal line, W ... water level.

Claims (4)

A vacuum pump that performs exhalation by sucking at least one of the gas in the intake pipe connected to the water supply pump and the water supply pump;
A check valve provided between the water supply pump and the vacuum pump to prevent a backflow of fluid from the vacuum pump to the water supply pump;
A pressure detector provided between the feed water pump and the check valve, and detecting a pressure between the feed water pump and the check valve;
A replenishing water tank connected to the discharge side of the vacuum pump and capable of storing water therein;
A water level detector for detecting the water level in the makeup tank;
When the pressure detected by the pressure detector is higher than a predetermined pressure, connected to the vacuum pump, the pressure detector and the water level detector, the vacuum pump is operated and detected by the water level detector. And a controller that stops the operation of the vacuum pump when the water level is higher than a predetermined reference water level.   A solenoid valve connected to the control unit, and further comprising a discharge port for discharging water from the reference water level to a predetermined lower water level when the reference water level is detected by the water level detector; A featured vacuum pump unit. Partitioning the interior of the replenishing water tank at least at the level of the water surface, and further comprising a partition plate for continuing the bottom of the replenishing water tank
The discharge side of the vacuum pump is disposed on one side of the makeup water tank partitioned by the partition plate,
The vacuum pump unit according to claim 1, wherein the water level detector is disposed on the other side of the makeup water tank partitioned by the partition plate. Detecting a pressure in the water supply pump by a pressure detector provided between the water supply pump and the vacuum pump;
When the pressure detected by the pressure detector is higher than a predetermined pressure, the vacuum pump sucks the gas in the water supply pump and performs exhalation, and causes the gas to flow into a makeup water tank;
A solenoid valve that opens and closes a drain outlet provided on the wall of the replenishing water tank and capable of draining water up to a predetermined level lower than a predetermined reference water level is detected by the pressure detector. Closing when the pressure is higher than a predetermined pressure;
Expiring water from the water supply pump, further sucking water in the water supply pump by the vacuum pump, and flowing the water into the makeup water tank;
Detecting whether or not the water level in the makeup tank has become the reference water level by a water level detector;
A step of stopping the operation of the vacuum pump and opening the electromagnetic valve when the water level detector detects the water level in the makeup water tank as the reference water level. Control method of vacuum pump unit.

Images