JP4083540B2 - Pump equipment with siphon break device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pumping facility having a siphon break apparatus capable of improving the reliability of a siphon break. <P>SOLUTION: A siphon pipeline 30 is connected to the discharge side of a pump 10, and the siphon break apparatus 50 is mounted to lead air into the siphon pipeline 30. The siphon break apparatus 50 is provided with a siphon break pump 51 driven by driving of a driving means 15 of the pump 10, and a valve 60 operated by water pressure generated by driving the siphon break pump 51 to open or shut off lead-in of outside air to the siphon pipeline 30. When the pump 10 is driven, the valve 60 is operated to shut off the lead-in of air to the siphon pipeline 30 by driving the siphon break pump 51, and water in a water tank 20 is discharged to a water tank 40 using a siphon phenomenon. During the stop of the pump 10, the valve 60 is operated to open the lead-in of outside air to the siphon pipeline 30 by the stop of the siphon break pump 51, and the siphon phenomenon is released to prevent the backflow of water. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pump facility with a siphon break device.
[0002]
[Prior art]
Conventionally, as shown in FIG. 10, a pump facility used for drainage or the like has a pump 450 installed in a water tank 400 on the suction side, and a discharge side of the pump 450 is connected to a water tank 500 on the discharge side. An open / close valve 461 is attached in the discharge side pipe 460, and a flap valve 463 is attached to the end of the discharge side pipe 460 (see, for example, Patent Document 1). And the impeller 451 of the pump 450 is rotationally driven by the drive means 455 connected to the pump shaft 453, thereby pumping the water in the water tank 400 to the water tank 500. On the other hand, when the pump 450 is stopped, the reverse flow of water is prevented by the flap valve 463. However, since the flap valve 463 may malfunction, the on-off valve 461 is further closed to reliably prevent the reverse flow of water.
[0003]
However, in the pump facility having the above-described structure, it is necessary to install an on-off valve 461 for shutting off flowing water in addition to the flap valve 463 in the discharge side pipe 460, so that the cost increases. Therefore, as shown in FIG. 11, a pump facility in which a siphon pipe 600 is connected to the discharge side of the pump 550 is considered. In this pump facility, the operation / stop state of an electric valve (or electromagnetic valve) 651 that introduces / blocks air into the siphon piping 600 and the driving means 555 that rotationally drives the pump 550 is detected in the siphon piping 600. A siphon break device 650 including an operation / stop detector 653 and a valve control device 655 for controlling opening / closing of the electric valve (or electromagnetic valve) 651 by a signal from the operation / stop detector 653 is attached. .
[0004]
When the pump 550 is operated, the operation / stop detector 653 detects that the drive means 555 is driven simultaneously with the rotation of the pump impeller 551 by the drive means 555 (or by an operation switch from the operation panel). Then, the signal is transmitted to the valve control device 655, and further, a signal is sent from the valve control device 655 to the motor-operated valve (or electromagnetic valve) 651 to close the siphon piping 600, and thus from the suction port of the pump 550. A siphon phenomenon is caused when the water in the suction-side water tank 700 is discharged into the discharge-side water tank 750.
[0005]
On the other hand, when stopping the pump 550, the driving / stop detector 653 detects that the driving unit 555 is stopped simultaneously with the driving unit 555 stopping the pump impeller 551 (or by a stop switch from the operation panel). The signal is transmitted to the valve control device 655, and further, a signal is sent from the valve control device 655 to the motor-operated valve (or electromagnetic valve) 651 to open it, and the siphon piping 600 is opened to the atmosphere. Introduce air to release the siphon phenomenon (siphon break) to prevent backflow of water from the discharge side to the suction side.
[0006]
By the way, in this pump equipment, if the siphon break does not operate well, water flows backward from the discharge side having a high water level to the suction side having a low water level at the same time as the pump is stopped, causing serious damage such as inundation on the suction side. Therefore, it is necessary to simplify the pump equipment as much as possible, reduce the number of failures, and increase the reliability.
[0007]
However, the siphon break device requires an operation / stop detector 653, a valve control device 655, and a motorized valve (or electromagnetic valve) 651 as the equipment configuration, and the control thereof also transmits and receives signals across a plurality of devices. Since it is necessary, in order to further improve the reliability, further simplification of the equipment configuration and simplification of control have been demanded.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-70782
[Problems to be solved by the invention]
This invention is made | formed in view of the above-mentioned point, The objective is to provide the pump installation with a siphon break apparatus which can improve the reliability of a siphon break.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 of the present invention includes a siphon break device that connects a siphon pipe to the discharge side of the pump and introduces air into the siphon pipe. The siphon break pump or compressor driven by the driving power of the pump, and the hydraulic pressure or water flow or air pressure generated by driving the siphon break pump or compressor to open / block air introduction to the siphon piping And a siphon break device-equipped pumping facility.
[0011]
Further, in the invention according to claim 2 of the present invention, the valve blocks the introduction of air into the siphon piping by driving the siphon break pump or compressor, and the siphon break pump or compressor stops the siphon piping to the siphon piping. The pump equipment with a siphon break device according to claim 1, wherein the pump equipment is configured to open air.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing pump equipment with a siphon break device according to an embodiment of the present invention. As shown in the figure, this pump equipment with a siphon break device has a pump 10 installed in a water tank 20 on the suction side, a siphon pipe 30 is connected to the discharge side of the pump 10, and the discharge side of the siphon pipe 30 is connected to the discharge side. It is configured to be connected to the water tank 40. The impeller 11 of the pump 10 is rotationally driven by driving means 15 connected to the pump shaft 13. On the other hand, the drive means 15 is constituted by an engine, a motor, or the like, and a siphon break pump 51 is connected to the shaft end of the drive shaft coaxially or via a gear (or belt). That is, the siphon break pump 51 is mechanically connected to the drive shaft of the drive means 15 and is driven simultaneously with the drive of the drive means 15. The suction-side piping 53 of the siphon break pump 51 is introduced into the suction-side water tank 20, and the discharge-side piping 55 is connected to a predetermined position of the siphon piping 30 (in the vicinity of the top in this embodiment) via a valve 60. At the same time, it is branched and put into the water tank 40 on the discharge side. The valve 60 switches between introducing air into the siphon piping 30 and blocking it. That is, the valve 60 blocks the introduction of air (outside air, atmosphere) to the siphon piping 30 when a water pressure of a predetermined value or more is supplied from the pipe 55, and siphons when the water pressure becomes a predetermined value or less. It operates to introduce air (outside air, air) into the pipe 30. The siphon break device 50 is constituted by the siphon break pump 51, the valve 60, and the pipes 53 and 55.
[0013]
Next, the operation of the pump equipment with the siphon break device will be described. In FIG. 1, when the driving means 15 is first driven, the impeller 11 is rotationally driven to start pumping of the pump 10, and water in the water tank 20 is pumped to the water tank 40 through the pump 10 and the siphon pipe 30. At the same time, the siphon break pump 51 is driven to rotate, and the water in the water tank 20 is sucked into the siphon break pump 51 through the pipe 53 and supplied to the valve 60 through the pipe 55, thereby closing the valve 60. Thus, the introduction of air (outside air) into the siphon piping 30 is blocked. As a result, the siphon pipe 30 is filled with water to cause a siphon phenomenon, and the actual head of the pump 10 is the difference in water level between the two water tanks 20 and 40.
[0014]
On the other hand, when the driving means 15 is stopped, the rotation of the impeller 11 is stopped and pumping of the pump 10 is stopped. At the same time, the siphon break pump 51 is stopped and water supply to the pipe 55 is stopped, so that the valve 60 is opened. As a result, air (outside air) is introduced into the siphon pipe 30, thereby releasing the siphon phenomenon of the siphon pipe 30 (siphon break), and the backflow of water from the discharge side to the suction side is reliably prevented.
[0015]
If the siphon break device 50 is configured as in this embodiment, the siphon break pump 51 and the valve 60 are both driven by mechanical force (rotation driving force of the driving means 15, ie, pump driving power and water pressure). Since the electrical control is not performed and only the siphon break pump 51, the valve 60, and the pipes 53 and 55 are simple, the reliable operation reliability of the siphon break device 50 is obtained. Can do.
[0016]
2 to 5 are conceptual diagrams showing valves 60-1 to 60-4 having various structures (however, commercially available water pressure, water flow, and pneumatic valves (general purpose valves) can also be used). That is, as shown in FIG. 2, the valve 60-1 connects the atmosphere release pipe 63 to the side wall of the pipe 61 connecting the siphon pipe 30 and the pipe 55, and stores the valve body 65 so as to be pulled upward by the spring 64. Configured. When water is supplied into the pipe 55 and becomes a water pressure higher than a predetermined pressure, the valve element 65 descends against the contraction force of the spring 64 as shown in FIG. And siphon piping 30 is shut off from the atmosphere. On the other hand, when the supply of water into the pipe 55 is stopped and the water pressure is lowered, the valve element 65 is raised by the contraction force of the spring 64 as shown in FIG. The pipe 30 is opened to the atmosphere.
[0017]
Next, as shown in FIG. 3, the valve 60-2 connects the tip of the pipe 56 branched from the pipe 55 to the side wall of the atmosphere opening pipe 67 directly connected to the siphon pipe 30, and closes the tip of the pipe 56. A diaphragm 69 is attached. When water is supplied into the pipe 56 and becomes a water pressure equal to or higher than a predetermined pressure, the diaphragm 69 expands and closes the atmosphere release pipe 67 and blocks the siphon pipe 30 from the atmosphere as shown in FIG. On the other hand, when the supply of water to the pipes 55 and 56 is stopped and the water pressure drops, the diaphragm 69 contracts and the atmosphere release pipe 67 is opened to open the siphon pipe 30 to the atmosphere as shown in FIG. .
[0018]
Next, as shown in FIG. 4, the valve 60-3 is provided with a valve body 75 that opens and closes an opening 73 provided on the upper surface of the atmosphere release pipe 71 directly connected to the siphon pipe 30. A float 79 is attached to the upper end, and one pipe 55 is provided with a container-like float storage part 81 at the upper part and an opening 83 opened and closed by the float 79 at the center of the upper surface. Then, when water is supplied into the pipe 55 and water is accumulated in the float storage unit 81, the float 79 rises and closes the opening 83 as shown in FIG. The siphon piping 30 is cut off from the atmosphere. On the other hand, when the supply of water to the pipe 55 is stopped and the water level in the float storage unit 81 is lowered, the float 79 is lowered to open the opening 83 and the valve body 75 is also lowered as shown in FIG. Opening 73 is also opened, thereby opening siphon pipe 30 to the atmosphere. In the case of this example, the float 79 operates to open and close the valve 60-3 depending on the presence or absence of a water flow through which water flows in the pipe 55.
[0019]
Next, as shown in FIG. 5, the valve 60-4 is provided with a valve body 89 that opens and closes an opening 87 provided on the upper surface of the atmosphere release pipe 85 that is directly connected to the siphon pipe 30. The upper end is inserted into a branch chamber 93 branched from the pipe 55, and a piston 95 is fixed to the tip of the branch chamber 93, and a spring between the piston 95 and the lower surface of the branch chamber 93 is elastically formed by a coil spring 97. When water is supplied into the pipe 55 and water (water pressure) is supplied into the branch chamber 93, the piston 95 descends against the elastic force of the coil spring 97 as shown in FIG. The valve body 89 closes the opening 87 and blocks the siphon piping 30 from the atmosphere. On the other hand, when the supply of water to the pipe 55 is stopped, as shown in FIG. 5B, the piston 95 rises due to the elastic force of the coil spring 97 and the valve body 89 opens the opening 87, thereby the siphon pipe 30. To the atmosphere.
[0020]
FIG. 6 is a schematic configuration diagram showing pump equipment with a siphon break device according to another embodiment of the present invention. In the figure, the same reference numerals are given to the same or corresponding parts as in the embodiment, and the detailed description thereof is omitted. The pump equipment with the siphon break device shown in the figure is different from the pump equipment with the siphon break device shown in FIG. 1 in that the siphon break pump 51 is connected to the shaft end of the drive shaft of the pump 10 coaxially or via a gear. It is only the point which did. That is, in this embodiment, the siphon break pump 51 is mechanically connected to the drive shaft of the pump 10 and is driven simultaneously with the drive of the pump 10. Needless to say, this configuration produces the same functions and effects as those of the above embodiment.
[0021]
FIG. 7 is a schematic configuration diagram showing pump equipment with a siphon break device according to another embodiment of the present invention. In the figure, the same reference numerals are given to the same or corresponding parts as in the embodiment, and the detailed description thereof is omitted. Also in the pump equipment with a siphon break device shown in the figure, the pump 10 is installed in the water tank 20 on the suction side, the siphon pipe 30 is connected to the discharge side of the pump 10, and the discharge side of the siphon pipe 30 is connected to the water tank 40 on the discharge side. Connected to and configured. In this embodiment, the siphon break compressor 101 is connected coaxially or via a gear (or belt) to the shaft end of the drive shaft of the drive means 15 that drives the impeller 11 in the pump 10. That is, the siphon break compressor 101 is mechanically connected to the drive shaft of the drive means 15 and is driven simultaneously with the pump 10 being driven. Further, the piping 103 on the discharge side of the siphon break compressor 101 is connected to a predetermined position (the top portion in this embodiment) of the siphon piping 30, and the siphon piping 30 is connected to the siphon piping 30 depending on the presence or absence of air pressure from the compressor 101. A valve 105 for switching between the introduction of air (outside air) and the blocking thereof is attached. When the air pressure in the pipe 103 exceeds a predetermined value, the valve 105 blocks the introduction of air (outside air) into the siphon pipe 30 and when the air pressure in the pipe 103 falls below the predetermined value, the valve 105 operates to introduce air (outside air) into the siphon pipe 30. . In addition, in order to prevent the air pressure in the pipe 103 from rising abnormally, a safety valve 107 that vents air when the pressure exceeds a predetermined pressure is attached to the pipe 103. The siphon break compressor 110, the valve 105, the pipe 103, and the safety valve 107 constitute a siphon break device 110.
[0022]
Next, the operation of the pump equipment with the siphon break device will be described. First, when the driving means 15 is driven, pumping of the pump 10 is started, and water in the water tank 20 is pumped to the water tank 40 through the pump 10 and the siphon pipe 30. The At the same time, the siphon break compressor 101 is driven to rotate and compressed air is supplied into the pipe 103, whereby the valve 105 blocks the introduction of air (outside air) into the siphon pipe 30. As a result, the siphon pipe 30 is sealed to cause a siphon phenomenon, and the actual head of the pump 10 becomes a difference in water level between the water tanks 20 and 40. On the other hand, when the driving means 15 is stopped, pumping by the pump 10 is stopped, and at the same time, the siphon break compressor 101 is stopped, the supply of compressed air to the valve 105 is stopped, and the valve 105 supplies air to the siphon piping 30 (outside air). Thus, the siphon phenomenon in the siphon pipe 30 is canceled (siphon break), and the backflow of water from the discharge side to the suction side is surely prevented.
[0023]
In the siphon break device 110 as in this embodiment, the siphon break compressor 101 and the valve 105 are both driven by mechanical force (rotation driving force of the driving means 15, that is, pump driving power and air pressure). In addition, since the electric control is not required and the components are simple components including the siphon break compressor 101, the valve 105, the pipe 103, and the safety valve 107, reliable operation reliability of the siphon break device 110 can be obtained. . As the valve 105 used in this embodiment, those shown in FIGS. 2, 3, and 5 can be used as they are.
[0024]
FIG. 8 is a schematic configuration diagram showing pump equipment with a siphon break device according to another embodiment of the present invention. In the figure, the same reference numerals are given to the same or corresponding parts as in the embodiment, and the detailed description thereof is omitted. Also in the pump equipment with siphon break device shown in the figure, the pump 10 is installed in the water tank 20 on the suction side, the siphon pipe 30 is connected to the discharge side of the pump 10, and the discharge side of the siphon pipe 30 is connected to the water tank 40. Configured. In this embodiment, a siphon break pump 121 is connected coaxially or via a gear (or belt) to the shaft end of the drive shaft of the drive means 15 that drives the impeller 11 in the pump 10. That is, the siphon break pump 121 is mechanically coupled to the drive shaft of the drive means 15 and is driven simultaneously with the drive means 15 being driven. The siphon break pump 121 is constituted by a self-contained pump or a vacuum pump, the pipe 123 on the suction side is connected to a predetermined position (in the vicinity of the top in this embodiment) of the siphon pipe 30, and the pipe 125 on the discharge side is gas-liquid. While being connected to a predetermined position (the top portion in this embodiment) of the siphon pipe 30 via a separator 127 and a valve 129, it is branched and put into the water tank 40 on the discharge side. The valve 129 switches between introduction of air into the siphon piping 30 and blocking thereof. That is, the valve 129 shuts off the introduction of air (outside air) to the siphon piping 30 when water pressure (or water flow) of a predetermined value or more is supplied from the pipe 125, and the water pressure (or water flow) becomes below a predetermined value. If so, the operation is such that air (outside air) is introduced into the siphon piping 30. The siphon break device 120 is configured by the siphon break pump 121, the gas-liquid separator 127, the valve 129, and the pipes 123 and 125.
[0025]
Next, the operation of the pump equipment with the siphon break device will be described. First, when the driving means 15 is driven, pumping by the pump 10 is started, and water in the water tank 20 is pumped to the water tank 40 through the pump 10 and the siphon pipe 30. To go. At the same time, the siphon break pump 121 is driven to rotate, and the air in the siphon pipe 30 is sucked and released to the outside by the gas-liquid separator 127. Next, the pump 10 pumps the water up to the upper part of the siphon pipe 30, exceeds it, and is discharged into the water tank 40. At this time, water begins to be sucked into the pipe 123 together with air, and the water is supplied to the valve 129 so that the valve 129 is activated and the valve 129 blocks the introduction of air into the siphon pipe 30. The air accumulated at the top of the siphon pipe 30 is gradually discharged toward the water tank 40 along with the flow of water, and at the same time, the air is sucked from the pipe 123 to be discharged. Is filled with water to form a siphon, and after that, water can be pumped efficiently. In this embodiment, after the introduction of air into the siphon piping 30 is blocked by the valve 129, the air remaining in the siphon piping 30 is also discharged by the siphon break pump 121. Can be efficiently discharged, and siphon formation time can be shortened. On the other hand, when the driving unit 15 is stopped, pumping by the pump 10 is stopped, and at the same time, the siphon break pump 121 is stopped and the supply of water to the valve 129 is stopped, and the valve 129 supplies air to the siphon piping 30 (outside air). As a result, air is introduced into the siphon piping 30 to eliminate the siphon phenomenon (siphon break), and the backflow of water from the discharge side to the suction side is reliably prevented.
[0026]
Also in the siphon break device 120 as in this embodiment, the siphon break pump 121 and the valve 129 are both driven by mechanical force (rotation driving force of the driving means 15, that is, pump driving power and water pressure). Therefore, the electric control is not used, and since the siphon break pump 121, the valve 129, the pipes 123 and 125, and the gas-liquid separator 127 are simple components, the operation of the siphon break device 120 is ensured. Reliability can be obtained. In this embodiment, the suction side pipe 123 of the siphon break pump 121 is attached near the top of the siphon pipe 30, but instead, the suction side pipe 123 is connected to the discharge side of the pump 10 as shown in FIG. 9. It may be attached to the vicinity.
[0027]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. Note that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, the valve structure is not limited to the structure of each of the above-described embodiments. In short, air to the siphon piping (outside air, air pressure or air pressure generated by driving a siphon break pump or compressor or air pressure) Any structure may be used as long as it is a valve that opens and shuts off the introduction of air). In the above embodiment, the water in the suction-side water tank 20 (or the water in the siphon pipe 30) is sucked into the siphon break pump, but the water in the discharge-side water tank 40 or other water is siphoned. You may comprise so that it may inhale into the pump for a break. In the above embodiment, the water discharged from the siphon break pump is configured to be sent to the water tank 40 on the discharge side. However, the water may be configured to be supplied to the water tank 20 on the suction side or other places. Good.
[0028]
【The invention's effect】
As described in detail above, according to the present invention, the siphon break pump or compressor is driven by a mechanical force called pump drive power, and the valve is driven by a mechanical force called water pressure, water flow or air pressure. Electrical control is not required, and components such as electrical instrumentation and control equipment can be omitted, resulting in a simple configuration. From these, reliable operation reliability of the siphon break device can be obtained. .
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing pump equipment with a siphon break device according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram showing a valve 60-1.
FIG. 3 is a conceptual diagram showing a valve 60-2.
FIG. 4 is a conceptual diagram showing a valve 60-3.
FIG. 5 is a conceptual diagram showing a valve 60-4.
FIG. 6 is a schematic configuration diagram showing pump equipment with a siphon break device according to another embodiment of the present invention.
FIG. 7 is a schematic configuration diagram showing pump equipment with a siphon break device according to another embodiment of the present invention.
FIG. 8 is a schematic configuration diagram showing pump equipment with a siphon break device according to another embodiment of the present invention.
FIG. 9 is a schematic configuration diagram showing pump equipment with a siphon break device according to another embodiment of the present invention.
FIG. 10 is a schematic configuration diagram showing a conventional pump facility.
FIG. 11 is a schematic configuration diagram showing pump equipment with a siphon break device.
[Explanation of symbols]
10 pump 11 impeller 13 pump shaft 15 drive means 20 water tank (suction side)
30 Siphon piping 40 Water tank (discharge side)
50 Siphon Break Device 51 Siphon Break Pump 60 (60-1-4) Valve 101 Siphon Break Compressor 105 Valve 107 Safety Valve 110 Siphon Break Device 120 Siphon Break Device 121 Siphon Break Pump 127 Gas-Liquid Separator 129 Valve

Claims (2)

While connecting siphon piping to the discharge side of the pump, attach a siphon break device that introduces air into this siphon piping,
The siphon break device is operated by a siphon break pump or compressor driven by the driving power of the pump, and water pressure, water flow or air pressure generated by driving the siphon break pump or compressor, and air is supplied to the siphon piping. A pumping equipment with a siphon break device, comprising a valve for opening / closing the introduction. The valve is configured to block the introduction of air into the siphon piping by driving the siphon break pump or compressor and to release the introduction of air into the siphon piping by stopping the siphon break pump or compressor. The pump equipment with a siphon break device according to claim 1.

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