JP2009197648A - Liquid pump and liquid pump system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid pump and a liquid pump system comprising simple and original performance and suitable for precedent stand-by operation. <P>SOLUTION: This liquid pump 10 comprises a pump body 30, a fixed pipe 20 and an air flow-in mechanism 28. The pump body 30 has impellers 31, a motor 33 for rotating the impellers 31, and an impeller casing 34 surrounding to cover the impellers 31 around the rotating direction. The fixed pipe 20 has a cylindrical column pipe 21 in which the pump body 30 is housed freely to be put in and pulled out, and a suction pipe 25 fitted to a lower end of the column pipe 21 so that liquid flows upward toward the impeller 31. The fixed pipe 20 forms a lower gap 11 vertically under the impeller housing 34, and forms a side gap 12 communicating with the inside of the impeller casing 34 through the lower gap 11 outside in the horizontal direction. The air flow-in mechanism 28 supplies air to the side gap 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pumping pump and a pumping pump system, and more particularly to a so-called column type pumping pump suitable for a prior standby operation and a pumping pump system including the pumping pump.

In recent years, in the construction of drainage stations, pumps that are easy to install and inspect and have excellent operability are required from the viewpoints of cost reduction and improvement in maintenance and management. As such a pump, it is a submersible pump (so-called column type submersible pump) configured such that the motor impeller assembly can be easily put in and out of the discharge casing body (column pipe), and is more than the tip of the impeller. Operation with an air pipe that allows air to flow into the lower suction pipe, and avoiding entrainment of the suction vortex that accompanies the generation of vibration even when the water level drops by letting the impeller inhale air with water. There is a submersible pump that is suitable for the preceding standby operation that makes it possible (see, for example, Patent Document 1). On the other hand, in a pump suitable for advanced standby operation, an annular air chamber that uniformly distributes the air introduced through the air pipe into the suction pipe is formed on the inner wall of the suction pipe to ensure that air flows into the suction pipe. The air chamber communicates with the inside of the suction pipe through an air inlet connected to an air pipe, and there is a pump having a swirl prevention plate between the impeller and the air inlet (for example, see Patent Document 2).
JP 2004-308508 A (paragraphs 0091-0115, etc.) Japanese Patent Laying-Open No. 2004-204834 (paragraph 0007, FIG. 1, etc.)

  However, if the air chamber as shown in Patent Document 2 is formed in the suction pipe of the column-type submersible pump as shown in Patent Document 1, the shape of the suction pipe becomes complicated, and inspection around the air chamber is performed. However, it is difficult to say that the advantages of the column type pump can be fully enjoyed.

  In view of the above-described problems, an object of the present invention is to provide a pumping pump having a simple and original property and a pumping pump system using the characteristics of the pumping pump.

  In order to achieve the above object, the pump according to the first aspect of the present invention includes an impeller 31, an electric motor 33 for rotating the impeller 31, and an impeller 31 as shown in FIG. A pump main body 30 having an impeller casing 34 enclosing so as to cover around the direction; a cylindrical column pipe 21 in which the pump main body 30 is housed so as to be able to be taken in and out; and a column pipe 21 arranged so that its axis is vertical. A fixed pipe 20 having a suction pipe 25 that flows upward toward the impeller 31 of the accommodated pump main body 30, with respect to the impeller casing 34 of the accommodated pump main body 30. Thus, a lateral gap 1 is formed between the suction pipe 25 in the vertical direction and communicated with the inside of the impeller casing 34 via the lower gap 11 with the fixed pipe 20 in the horizontal direction. A fixed pipe 20 that forms a; and a air inlet mechanism 28 for supplying air to the side gap 12.

  If comprised in this way, the fixed pipe which forms the side clearance which communicates with the inside of an impeller casing through a lower gap between a fixed pipe in the horizontal direction with respect to the impeller casing of the stored pump body, and the side Since it is equipped with an air inflow mechanism that supplies air to the side gap, it becomes possible to supply the air that is distributed substantially uniformly in the side gap from the lower gap into the suction pipe, This is a so-called column-type pump that is simple and uses the structure for demonstrating the original function and is suitable for the preceding standby operation having the original properties.

  Further, the pump according to the second aspect of the present invention is, for example, as shown in FIG. 2, in the pump according to the first aspect of the present invention, the pump body 30 accommodated in the fixed pipe 20. A rotation preventing member 41 that is attached to the inner surface of the column pipe 21 outside the impeller casing 34 and prevents the liquid pumped by the rotation of the impeller 31 is provided.

  With this configuration, it is possible to reduce the negative pressure generated near the inside of the lower gap in order to cause air to be sucked into the suction pipe, so that the suction of air from the side gap can be reduced. The obstruction can be reduced, and a decrease in the amount of air supplied from the side gap can be suppressed.

  Moreover, as shown in FIG.3 (c) and FIG.15 (c), the lifting pump which concerns on the 3rd aspect of this invention is a fixed pipe in the lifting pump which concerns on the said 1st aspect of this invention, for example. 20 is a swirl prevention member that prevents swirling of the liquid pumped by rotation of the impeller 31 below the impeller 31 on the inner surface of the impeller casing 34 of the pump body 30 accommodated in the inner surface of the pump body 30 or on the inner surface of the suction pipe 25B. 41C (see, for example, FIG. 3C) and 41A (see, for example, FIG. 15C).

  With this configuration, it is possible to reduce the negative pressure generated near the inside of the lower gap in order to cause air to be sucked into the suction pipe, so that the suction of air from the side gap can be reduced. The obstruction can be reduced, and a decrease in the amount of air supplied from the side gap can be suppressed.

  Moreover, the pump according to the fourth aspect of the present invention is, for example, as shown in FIG. 4, in the pump according to any one of the first to third aspects of the present invention, A temperature rise prevention means is provided for preventing the temperature of the electric motor 33 from rising when the impeller 31 is turned into an air lock state or an air operation state.

  With this configuration, even if the temperature of the motor rises due to the air lock state or the air operation state where liquid is not pumped while the liquid stays in the upper part of the impeller during the preliminary standby operation, a failure due to overheating of the motor will occur. This can be prevented beforehand.

  Further, the pump according to the fifth aspect of the present invention is in any one of the first to fourth aspects of the present invention as shown in FIGS. 7, 8, and 9, for example. In such a pump, the fixed pipe 20 reduces support members 22s (for example, see FIG. 7), 61 (for example, see FIG. 8), 62 (for example, FIG. 9).

  With this configuration, the pumping pump in which the pump body is housed so that it can be inserted into and removed from the fixed pipe has a relative vibration between the fixed pipe and the pump body during an air-water mixing operation in which vibration may increase. Movement can be suppressed.

  Moreover, the pump according to the sixth aspect of the present invention is a pump according to any one of the first to fifth aspects of the present invention as shown in FIG. The pump body 30 has a bearing 36 that supports a rotating shaft 32 that rotates the impeller 31 on the upstream side of the impeller 31.

  If comprised in this way, it can prevent that an impeller contacts an impeller casing.

  Moreover, the pumping pump system according to the seventh aspect of the present invention is a pumping system according to any one of the first to fourth aspects of the present invention, as shown in FIGS. A plurality of liquid pumps (10A, 10B, 10C); each pump body 30, 30, 30 is configured to be interchangeable with each fixed pipe 20, 20, 20; 10C is configured to start steady operation at different liquid levels.

  If comprised in this way, since each pumping pump starts a steady operation at a different liquid level, the fluctuation | variation of a water level can be made loose and the frequent start / stop of a pumping pump can be reduced. . Moreover, since each pump main body is comprised so that it can mutually replace | exchange for each fixed pipe, the accumulated operation time of each pump main body can be equalized. Furthermore, the design of the pump body other than the fixed pipe can be made uniform and the parts can be shared, so that the product is excellent in economy and reliability.

  In addition, the pump according to the eighth aspect of the present invention is, for example, as shown in FIG. 4, an electric motor 33 that rotates the rotary shaft 32 arranged in the vertical direction around the axis; An impeller 31; a column pipe 21 that houses the electric motor 33 and the impeller 31, and causes liquid to flow upward by rotation of the impeller 31; and is connected to the column pipe 21 on the upstream side of the impeller 31, and is connected to the impeller 31. A suction pipe 25 that forms a flow path for flowing liquid toward the inside; an air inflow mechanism 28 that supplies air into the column pipe 21 or the suction pipe 25 upstream of the impeller 31 (see, for example, FIG. 14); And a control means 50 for controlling the electric motor 33 so as to avoid the failure due to overheating when the impeller 31 is brought into an air lock state or an air operation state.

  With such a configuration, since the motor is controlled so as to avoid the failure due to overheating when the impeller is in an air lock state or an in-air operation state, the liquid is impeller during the preceding standby operation. Even if the temperature of the electric motor rises due to an air lock state in which the liquid is not pumped while remaining in the upper part of the air or in the air operation, it is possible to prevent a failure due to overheating of the electric motor.

  According to the present invention, a fixed pipe that forms a lateral gap communicating with the inside of the impeller casing via a lower gap between the fixed pipe in the horizontal direction with respect to the impeller casing of the accommodated pump body, and the side Since it is equipped with an air inflow mechanism that supplies air to the side gap, it becomes possible to supply the air that is distributed substantially uniformly in the side gap from the lower gap into the suction pipe, This is a so-called column-type pump that is simple and uses the structure for demonstrating the original function and is suitable for the preceding standby operation having the original properties.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or similar members are denoted by the same or similar reference numerals, and redundant description is omitted.

  First, with reference to FIG. 1, the structure of the pumping pump 10 which concerns on the 1st Embodiment of this invention is demonstrated. FIG. 1 is a front sectional view of a pumping pump 10 as a pumping pump. The pumping pump 10 is a pump for preceding standby operation that pumps water as a liquid. The pumping pump 10 includes a fixed pipe 20 fixed to the structure 99, a pump main body 30 housed in the fixed pipe 20 so as to be able to be taken in and out, and an air pipe 28 as an air inflow mechanism for introducing air at a low water level. I have. Typically, the pump main body 30 is accommodated in the fixed pipe 20 during operation of the pumping pump 10, and the pump main body 30 is handled so as to be pulled out from the fixed pipe 20 during inspection.

  The fixed pipe 20 includes a column pipe 21 that mainly accommodates the pump body 30 and a suction pipe 25. The column pipe 21 is a member that has a length that can cover the pump body 30 and is formed in a cylindrical shape, typically a cylindrical shape. The column pipe 21 is typically made of steel or cast iron. The column pipe 21 is arranged so that its axis is vertical, and is fixed to the structure 99 (slab located above the water tank 98 in the present embodiment). Here, “vertical” is a concept that includes a state in which the pump main body 30 is tilted in a range that does not hinder access. The column pipe 21 is provided with a branch pipe 21p extending in the horizontal direction above a predetermined height above the upper end of the accommodated pump main body 30. The “predetermined height” is a height that secures a distance that can stabilize the flow of the pumped water. The branch pipe 21p forms a flow path of pumped water. Further, the column pipe 21 is provided with a mounting seat 24 for fixing to the structure 99 on the outer periphery. The column pipe 21 has an upper flange 21a at the upper end and a lower flange 21b at the lower end. A removable column lid 22 is airtightly attached to the upper flange 21a. A suction pipe 25 is attached to the lower flange 21b.

  The suction pipe 25 is a member formed integrally by attaching a different diameter pipe 25p to a suction pipe flange 25f in which an opening 25h having a diameter smaller than the inner diameter of the column pipe 21 is formed. The suction pipe 25 is typically made of steel or cast iron, and the whole is integrally formed. The suction pipe 25 is formed such that, when attached to the column pipe 21, the axis of the column pipe 21 and the axis of the different diameter pipe 25p coincide, and this axis passes through the center of the opening 25h. The different diameter pipe 25p is formed in a bell mouth shape in which the diameter is gradually reduced from the suction pipe flange 25f downward, and then the diameter is rapidly increased to the same extent as the diameter of the column pipe 21 near the lower end. ing. The size of the opening 25 h formed in the suction pipe flange 25 f is substantially the same as the inner diameter of the suction port of the pump body 30.

  The pump body 30 includes an open-type impeller 31 and an electric motor 33 with the impeller 31 attached to the tip of a rotating shaft 32. The electric motor 33 is a submersible motor, and the pumping pump 10 of the present embodiment is configured as a column type submersible motor pump. The pump main body 30 is configured to be able to be taken in and out of the column pipe 21 as an electric motor impeller assembly in which an electric motor 33 and an impeller 31 are integrally assembled. When the pump body 30 is accommodated in the column pipe 21, the rotating shaft 32 coincides with the axis of the column pipe 21, and the impeller 31 is positioned below the electric motor 33. The electric motor 33 is a dry motor, and the inside is sealed and sealed from the outside. The whole is surrounded by a motor casing 337 so that water does not enter the inside when operated in water. A lower portion of the motor casing 337 has a penetrating portion of the rotating shaft 32, and a mechanical seal 336 as a shaft seal device is provided in the penetrating portion.

  Inside the rotor sealed by the mechanical seal 336 and the motor casing 337, the rotor 332 fixed to the rotating shaft 32, the stator 333 disposed on the outer periphery with a slight clearance from the rotor 332, and the rotating shaft 32 are rotated. A lower bearing 334 and an upper bearing 335 that can be supported are accommodated. The stator 333 is fixed to the motor casing 337. The lower bearing 334 and the upper bearing 335 are preferably lubricant-enclosed bearings that do not require lubrication. In the present embodiment, a rolling bearing filled with grease is used. Since the impeller 31 is attached to the rotating shaft 32 common to the electric motor 33, the bearings can be two rolling bearings 334 and 335. In particular, at least one of the rolling bearings 334 and 335 is an angular contact type so that a thrust load (the weight of the rotating body including the impeller 31, the rotating shaft 32, and the rotor 332 and the fluid force applied to the impeller 31) is also received. Ball bearings. A power cable 33c for driving is drawn out from the upper part of the motor casing 337. The cable drawer is sealed so that water does not enter the motor.

  The pump body 30 further has an impeller casing 34 that surrounds the side surface of the impeller 31 (around the rotation direction). A guide vane 35 is disposed on the discharge side of the impeller 31. The impeller casing 34 has a length that surrounds the guide vane 35 in addition to the impeller 31 so as to cover the side surface. The impeller casing 34 is formed so that the inner diameter of the lower end is substantially the same as the opening 25h of the suction pipe flange 25f (the inner diameter of the different diameter pipe 25p), and the outer diameter of the upper end is slightly smaller than the inner diameter of the column pipe 21. Has been. The impeller casing 34 is formed so that the diameter gradually increases from the lower end toward the upper end. In the figure, the impeller 31 is an oblique flow impeller, but it may be an axial impeller. In the case of an axial flow impeller, the impeller casing 34 is formed with the same diameter from the lower end to the upper end.

  An annular fitting seat 34 s is formed on the outer periphery of the impeller casing 34. On the other hand, an annular receiving seat 23 is formed on the inner surface of the column pipe 21. The receiving seat 23 and the fitting seat 34s are in close contact with each other so that air and water do not pass through the entire circumference of the fitting portion when fitted. By fitting the receiving seat 23 and the fitting seat 34 s, the pump main body 30 is placed on the column pipe 21, and the position of the pump main body 30 with respect to the column pipe 21 when the pump main body 30 is accommodated in the column pipe 21. Is decided. At this time, the receiving seat 23 and the fitting seat 34s are formed at a position where the lower gap 11 having a predetermined width is formed between the lower end of the impeller casing 34 and the upper surface of the suction pipe flange 25f. ing. The lower gap 11 is typically formed horizontally across the lower end of the impeller casing 34. The lower gap 11 is a gap provided for introducing air into the impeller casing 34, and is a clearance set when the pump body 30 is accommodated in the fixed pipe 20 (a fitting seat 34 s with respect to the receiving seat 23. The effect (meaning) is different from that which is set so as not to float).

  When the position of the pump body 30 with respect to the column pipe 21 when the pump body 30 is accommodated in the column pipe 21 is determined, the inner surface of the column pipe 21, the outer surface of the impeller casing 34, and the upper surface of the suction pipe flange 25f A side gap 12 is formed which is a gap (space) surrounded by. The lateral gap 12 is formed on the entire circumference around the rotation shaft 32. The side gap 12 communicates with the inside of the impeller casing 34 via the lower gap 11.

  One end 28 a of the air pipe 28 is attached to the column pipe 21 in the part forming the side gap 12. The air pipe 28 communicates with the side gap 12 through one end 28a. The air pipe 28 extends upward without being lowered from the one end 28a, and the other end 28b is open to the atmosphere above the highest water level HWL. In this way, the other end 28b is not submerged, so that foreign matter existing in the water can be prevented from being sucked from the other end 28b. If the other end 28b is opened outside the water tank 98, it is possible to reliably prevent suction of foreign matter existing in the water. In addition, it is good also as opening the other end 28b inside the water tank 98 from a viewpoint which prevents that a strange odor dissipates outside where a maintenance manager may exist. One or a plurality of air pipes 28 may be attached.

  Next, the operation of the pumping pump 10 will be described. First, the pumping pump 10 is started in a state where the water level is lower than the water level A1 at the lower end (opening) of the suction pipe 25. For example, when there is rainfall information indicating that heavy rain has fallen upstream of the river, it is predicted that the water level will suddenly rise after a certain time. In such a case, the pumping pump 10 for the preceding standby operation is started in a state where the water level is lower than A1. This is the start of the preceding standby operation. In addition, the water level which starts the pumping pump 10 may be in a state above the water level A1, that is, operation is possible regardless of the water level.

  The water level in the water tank rises due to the inflow of rainwater and exceeds the lower end water level A1 of the suction pipe 25. Even if the water level exceeds the lower end water level A1 or exceeds the lower gap upper end water level TWL corresponding to the height of the upper end of the lower gap 11, water is not yet sucked up. The impeller 31 is idling (air operation). When the water level further rises and reaches the suction start water level SLWL, the impeller 31 starts to suck water. The suction start water level SLWL corresponds to the water level at the lower end portion of the impeller 31. At this time, air is also sucked into the impeller casing 34 through the air pipe 28, the side gap 12, and the lower gap 11, so that it is not an operation for discharging the total amount of water of the pumping pump 10 (steady operation). That is, the pumping pump 10 performs air-water mixing operation. When the water level further rises, the amount of intake air gradually decreases and the amount of water increases instead. Eventually, when the water level rises to the steady operation water level RWL, the intake air amount becomes zero, and the total water amount of the pumping pump 10 is discharged. That is, the steady operation is started. The water sucked up by the rotation of the impeller 31 rises in the column pipe 21 and is discharged through the branch pipe 21p.

Steady operation level RWL is only high water level h ≒ ^v 2 / 2g from below the gap upper water level TWL. Here, v is the flow velocity of water at that position, and g is the weight acceleration. In the lower gap 11 part, the pressure is lower than the case where there is no water flow by the amount of the speed head according to Bernoulli's theorem, so the position head is equal to the above speed head at the steady operation water level RWL. In such a position, the pressure is zero (atmospheric pressure). The lower gap 11 portion has a negative pressure when the water level falls below the steady operation water level RWL, and communicates with the atmosphere through the side gap 12 and the air pipe 28, so that the impeller casing 34 has the other end 28 b of the air pipe 28. Air is sucked into the interior.

  Further, the steady operation water level RWL is preferably equal to the minimum water level LWL from the viewpoint of entering the steady operation as soon as possible, but is usually set higher than that in view of safety. The steady operation water level RWL is arbitrarily set as a liquid level obtained by adding a height h to the lower clearance upper end water level TWL (lower end of the impeller casing 34), for example, by appropriately setting the length (height) of the impeller casing 34. Can be determined. The minimum water level LWL is a value peculiar to the pump, and if the water level falls below this level, the continuation of the pump operation is hindered if the air pipe 28 is not provided. If the air pipe 28 is not present, the air begins to be sucked in a spiral shape from the lower end of the suction pipe 25 below the minimum water level LWL, resulting in a water level where vibration and noise are generated and the continuation of operation becomes difficult. The minimum water level LWL is other than the spiral air suction. It may be determined by the conditions of By sucking air into the impeller casing 34 from the lower gap 11 until the water level exceeds the lower gap upper end water level TWL and reaches the lowest water level LWL, air is not sucked in from the lower end of the suction pipe 25, and vibration or The occurrence of problems such as noise can be avoided and the operation can be continued as it is.

  Further, the water level rises to a water level between the lowest water level LWL and the highest water level HWL, and the pumping pump 10 continues the steady operation. Thereafter, the water level is lowered by the drainage of the pumping pump 10, and when the water level falls below the steady operation water level RWL, the air begins to be sucked into the impeller casing 34 through the air pipe 28, the side gap 12, and the lower gap 11. That is, the air / water mixing operation is started again. As the water level falls, the amount of intake air increases and the amount of water decreases instead. When the water level further falls and reaches the lower end water level A1, the suction of water ends. At this time, the pump 10 is in an air lock state in which water is not sucked at all and water remains above the impeller 31. In the air lock state, water does not rise up to the branch pipe 21p, and the electric motor 33 agitates the water remaining above the impeller 31. When the water level drops to the lower gap upper end water level TWL, or when the water level falls to between the lower gap upper end water level TWL and the lower end water level A1, the impeller 31 is in the air operation state in which it is operated in the air. However, in this embodiment, when the water level drops to the lower end water level A1, the water suction ends. ing. If it continues to rain, continue driving.

  When the water level once falls below the lower end water level A1 and then rises again, if the water level is such that water remains above the impeller 31, the lower end water level A1 where the water level is the height of the suction pipe 25 The water starts to be sucked up when it reaches. On the other hand, in the aerial operation state in which no water remains above the impeller 31, water suction starts when the water level reaches the suction start water level SLWL as described above. In this way, the pumping pump 10 for the pre-standby operation can continue operation between the idle operation (air operation state or air lock state) and the operation of the total water amount regardless of the water level of the water tank 98. it can. The transition between the idle operation and the full water operation is smooth because the pump 10 sucks air from the air pipe 28 together with water.

  Next, with reference to FIG. 2, the pumping pump 102 which concerns on the 2nd Embodiment of this invention is demonstrated. FIG. 2 is a front sectional view of the pumping pump 102. The difference between the pumping pump 102 according to the second embodiment and the pumping pump 10 according to the first embodiment (refer to FIG. 1) is that the lower gap 11 is formed larger and upstream of the impeller 31. This is that a rotation preventing plate 41 as a rotation preventing member is provided on the inner surface of the column pipe 21. The other structure is the same as that of the pumping pump 10 (refer FIG. 1). The pump for the preliminary standby operation that performs the air-water mixing operation at the steady operation water level RWL or lower does not generate the swirl flow when the water level is low and the swirl flow is generated below the impeller 31 when air is sucked in together with water. Compared to the case, the negative pressure generated in the vicinity of the lower gap 11 is reduced, and sufficient intake is not performed, and the air-water mixing operation may not be performed as expected.

  The pumping pump 102 is provided with a swirl prevention plate 41 that reduces the generation of swirling flow that causes the negative pressure generated near the lower gap 11 to be reduced as compared with the case where swirling flow does not occur. The anti-rotation plate 41 is typically a rectangular plate, and one side is fixed to the inner surface of the column pipe 21 so that the vertical line is horizontal, and the side opposite to the fixed side is the axis of the column pipe 21. It extends in the direction of heading. When the side extending in the direction toward the axis of the column pipe 21 extends the lower end of the impeller casing 34 until it contacts the suction pipe flange 25f, the anti-swivel plate 41 has an inner surface of the virtual portion of the impeller casing 34. It is formed so as not to protrude inward. The rotation preventing plate 41 is at a distance that does not interfere with the lower end of the impeller casing 34 when the pump body 30 is taken in and out, and the interval with the upper surface of the suction pipe flange 25f performs the air-water mixing operation. The distance is such that air can be inhaled. Typically, a plurality (four in this embodiment) of anti-swivel plates 41 are provided at intervals such that the central angles of the circumference in the horizontal cross section of the column pipe 21 are equal.

  When the pumping pump 102 performs the air / water mixing operation at the steady operating water level RWL or lower, even if a swirl flow is generated below the impeller 31, the swirl prevention plate 41 may interfere with the flow of water around the rotation shaft 32. Thus, the generation of swirling flow is reduced. As a result, the negative pressure generated in the lower gap 11 is reduced, and sufficient intake is performed. Therefore, it can be avoided that the operation such as the suction pipe 25 sucking air in a spiral shape from the water surface and causing vibrations becomes unstable.

  In FIG. 3, a part of front cross section of the pumping pump which concerns on the modification of the 2nd Embodiment of this invention is shown. (A) shows the pumping pump 102A according to the first modification, (b) shows the pumping pump 102B according to the second modification, and (c) shows the pumping pump 102C according to the third modification. In the pumping pump 102A, instead of the rectangular anti-rotation plate 41 provided in the lower part of the lateral gap 12 and the lower gap 11 in the pumping pump 102, an anti-rotation plate 41A formed of a right triangle or a trapezoidal plate is provided on the side. It is provided in the side gap 12. If comprised in this way, since there is no rotation prevention member in a main water flow, there will be no flow path loss and there will also be almost no catch of refuse. When the pumping pump 102B has a side extending in the direction toward the axis of the column pipe 21 of the anti-rotation plate 41 as compared with the pumping pump 102, the lower end of the impeller casing 34 is extended until it hits the suction pipe flange 25f. The imaginary portion is formed so as to protrude inward from the inner surface of the impeller casing 34. If comprised in this way, a swirl flow can be stopped in a larger area, and also a swirl flow can be reduced. In the pumping pump 102C, instead of the rectangular anti-rotation plate 41 provided in the lower portion of the lateral gap 12 and the lower gap 11 in the pumping pump 102, an anti-rotation plate 41C formed of a rectangular plate is provided by the impeller 31. Is also provided in the upstream impeller casing 34. The anti-rotation plate 41C has one side fixed to the inner surface of the impeller casing 34 so that the vertical line is horizontal, and the side facing the fixed side extends in a direction toward the axis of the impeller casing 34. A plurality of anti-rotation plates 41C are provided as in the other embodiments. The configuration may be such that the imaginary portion protrudes inward from the inner surface of the impeller casing 34.

  Next, with reference to FIG. 4, the pumping pump 103 which concerns on the 3rd Embodiment of this invention is demonstrated. FIG. 4 is a front sectional view of the pumping pump 103. The pumping pump 103 according to the third embodiment further includes a temperature rise prevention means for the electric motor 33 as viewed from the pumping pump 10 according to the first embodiment (see FIG. 1). As described above, the electric motor 33 only agitates the water remaining above the impeller 31 when in the air lock state, and only agitates the air around the impeller 31 when in the air operation state. In the operation of the air lock state or the air operation state in which water or air is not replaced, the electric motor 33 is not cooled, and if this is continued, the electric motor 33 may be broken. In order to avoid these disadvantages, the pump 103 has a control device 50, an ammeter 51, an electrode bar 52, a bypass pipe 53 provided with a bypass valve 53v, and an exhaust valve 54v that function as a temperature rise prevention means. An exhaust pipe 54 is provided.

  The ammeter 51 is a meter that detects the current value of the electric motor 33. The ammeter 51 detects a large value when the load of the electric motor 33 is large. Therefore, the current value in the air operation state is significantly smaller than the current value in the steady operation, the gas-liquid mixing operation, or the air lock state. The ammeter 51 is typically provided on a power board (not shown) that transmits electric power to the electric motor 33 or the like. The ammeter 51 may be a meter that detects the power factor value of the electric motor 33. The electrode bar 52 detects whether or not the water level in the column pipe 21 has reached a predetermined water level. The electrode bar 52 is disposed such that the lower end thereof is positioned at a height to which the branch pipe 21p in the column pipe 21 is connected. The electrode bar 52 detects whether or not the water level in the column pipe 21 has reached a predetermined water level by detecting the presence or absence of liquid contact with the electrode bar 52 in cooperation with a common electrode (not shown). be able to. When the electrode rod 52 detects liquid contact, water flows through the branch pipe 21p.

  The bypass pipe 53 can guide the water staying in the upper part of the impeller 31 into the water tank 98 in the air lock state. One end 53a of the bypass pipe 53 is connected to the outer surface of the column pipe 21 below the water level in the column pipe 21 and above the upper end of the impeller 31 when in the air lock state. It communicates with the pipe 21. The one end 53 a is typically connected to the outer surface of the column pipe 21 just above the upper end of the impeller casing 34. The one end 53 a is preferably provided at a height near the lower end of the electric motor 33. The bypass pipe 53 extends horizontally when viewed from one end 53a, and then changes its direction and extends downward. The other end 53b is opened below the impeller 31 and downward. The bypass pipe 53 is provided with a bypass valve 53v that can block the flow of water. The bypass valve 53v is typically an electric valve or an electromagnetic valve.

  The exhaust pipe 54 is capable of discharging the air in the column pipe 21 to the atmosphere outside the column pipe 21. It is preferable that the exhaust pipe 54 be provided above the column pipe 21 because it is possible to create a flow of air from below to above. The bypass pipe 54 is typically attached to the column lid 22 and is configured so that the inside of the column pipe 21 communicates with the outside air outside the column pipe 21. The exhaust pipe 54 is provided with an exhaust valve 54v that can block the flow path. The exhaust valve 54v is typically an electromagnetic valve or an electric valve.

  The control device 50 is configured to control each device constituting the temperature rise prevention means so as to prevent the temperature rise of the electric motor 33. The control device 50 is electrically connected to the ammeter 51 via a signal cable, and is configured to receive a current value detected by the ammeter 51 as a signal. Further, the control device 50 is electrically connected to the electrode rod 52 via a signal cable, and is configured to receive the detected water level as a signal. The control device 50 is electrically connected to the bypass valve 53v and the exhaust valve 54v via signal cables, respectively, and transmits an open / close signal to open or close the bypass valve 53v and the exhaust valve 54v, respectively. It is configured to be able to. In addition, the control device 50 has a timer (not shown) as time measuring means.

  Here, the operation of the pumping pump 103 will be described with reference to the flowchart of FIG. The pumping pump 103 is controlled by the control device 50 as described below. The pumping pump 103 performs the operation as described in the description of the operation of the pumping pump 10 according to the first embodiment (see FIG. 1) according to the fluctuation of the water level (S1). At this time, the bypass valve 53v and the exhaust valve 54v are closed. Then, during the operation of the pumping pump 103, the control device 50 determines whether or not the air lock state has been reached (S2). Whether or not it is in the air lock state is determined by the ammeter 51 to detect that the electric motor 33 is loaded, and when it is detected that the electrode bar 52 is not in contact with the liquid, the air lock state is determined. . When the air lock state is set, it is determined whether or not a first predetermined time has elapsed since the air lock state was set (S3). The “first predetermined time” can be arbitrarily determined within a time period in which the motor 33 does not reach such a high temperature that the motor 33 fails even if the airlock state continues. On the other hand, there is a significance of the pump suitable for the preceding standby operation in preparation for the rise of the water level in the air lock state. Therefore, it is preferable to continue the air lock state within a range where the electric motor 33 does not break down.

  In the step (S3) of determining whether or not the first predetermined time has elapsed since the air lock state has been entered, whether or not the air lock state has been entered if the first predetermined time has not elapsed The process returns to the step of determining (S2). On the other hand, when the first predetermined time has elapsed, the bypass valve 53v is opened (S4). When the bypass valve 53v is opened, the water that has been retained and stirred above the impeller 31 in the column pipe 21 flows out of the column pipe 21 through the bypass pipe 53. At this time, water may be pumped from the suction pipe 25 to above the impeller 31 so as to replenish the water that has flowed out, and the air lock state may continue, but the water flows out of the bypass pipe 53. Since the water in the column pipe 21 is replaced, the temperature rise of the electric motor 33 is suppressed.

  If the bypass valve 53v is opened, it is determined whether or not the air lock state has been eliminated (S5). When the control device 50 detects that the electrode rod 52 is in contact with the liquid (gas-liquid mixing operation or steady operation) or when the ammeter 51 detects that the electric motor 33 is not loaded (air operation) Status) is determined to have been released. When the air lock state has not been eliminated, the process returns to the step (S5) of determining whether or not the air lock state has been eliminated again while maintaining the state where the bypass valve 53v is opened. On the other hand, when the air lock state is eliminated, the temperature rise prevention measure is reset (S10), and the operation returns to the normal operation of the pumping pump 103 (S1). The reset here is to reset the time measurement after closing the bypass valve 53v and the air lock state.

  In the step (S2) of determining whether or not the air lock state is established, if the air lock state is not established, it is determined whether or not the air operation state is established (S6). Whether the motor 33 is in the air operating state is determined to be in the air operating state when the ammeter 51 detects that the motor 33 is not loaded. When the air operation state is entered, it is determined whether or not a second predetermined time has elapsed since the air operation state was established (S7). The “second predetermined time” can be arbitrarily determined within a time period in which the motor 33 does not reach such a high temperature that the motor 33 fails even if the air operation state continues. The second predetermined time may be the same as the first predetermined time. On the other hand, there is a significance of a pump suitable for the preceding standby operation in preparation for the rise of the water level in the air operation state. Therefore, it is preferable to continue the air operation state within a range where the electric motor 33 does not fail.

  In the step (S7) of determining whether or not the second predetermined time has elapsed since entering the aerial operation state, if the second predetermined time has not elapsed, whether or not the air lock state has been established. It returns to the process (S2) which judges. On the other hand, when the second predetermined time has elapsed, the exhaust valve 54v is opened (S8). When the exhaust valve 54v is opened, the air in the column pipe 21 flows out of the column pipe 21 through the exhaust pipe 54, and accordingly the impeller through the air pipe 28, the side gap 12, and the lower gap 11 is provided. Air flows into the casing 34. That is, an air flow from the lower gap 11 toward the exhaust pipe 54 is formed in the column pipe 21. Since the air is exchanged in this way, the temperature rise of the electric motor 33 is suppressed.

  When the exhaust valve 54v is opened, it is determined whether or not the in-air operation state has been resolved (S9). The control device 50 determines that the in-air operation state has been resolved when the ammeter 51 detects that the electric motor 33 is loaded. If the in-air operation state has not been eliminated, the process returns to the step of determining whether the in-air operation state has been eliminated while maintaining the state in which the exhaust valve 54v is opened (S9). On the other hand, when the aerial operation state is resolved, the temperature rise prevention measure is reset (S10), and the operation returns to the normal operation of the pumping pump 103 (S1). The reset here is performed by closing the exhaust valve 54v and resetting the time measurement after the air operation state is reached.

  In the above description of the lift pump 103, water is discharged from the bypass pipe 53 to the outside of the column pipe 21 when the air lock state is established, and the air is discharged from the exhaust pipe 54 when the air operation state is established. Although it was made to flow outside, you may comprise so that the control apparatus 50 may perform control which stops the electric motor 33, when it will be in an air lock state or an air operation state. With this configuration, the bypass pipe 53 provided with the bypass valve 53v and / or the exhaust pipe 54 provided with the exhaust valve 54v can be omitted, and the apparatus configuration is simplified. Further, in the pump 103, instead of automatically controlling the bypass valve 53v and the exhaust valve 54v, it may be manually opened and closed. In this case, it is preferable that an alarm or the like can be notified that the air lock state or the air operation state has been reached. Moreover, in the pumping pump 103, the exhaust pipe 54 may be omitted, and the apparatus configuration may be simplified by allowing the bypass pipe 53 to also function as the exhaust pipe 54.

  In FIG. 6, the detailed cross section around the side clearance 12 of the pumping pump which concerns on the modification of the 3rd Embodiment of this invention is shown. In the modified example shown in FIG. 6 (a), with the pumping pump 10 (see FIG. 1) as a basic configuration, a receiving seat hole 23h is formed in the receiving seat 23, and the upper and lower portions defined by the receiving seat 23 and the fitting seat 34s. The parts are configured to communicate with each other, the bypass pipe 53 provided with the bypass valve 53v provided in the pumping pump 103 (see FIG. 4), the exhaust pipe 54 provided with the exhaust valve 54v, and the control device 50. The ammeter 51 and the electrode rod 52 are omitted. In such a configuration, when the air lock state is established, water staying in the upper part of the impeller 31 passes through the receiving seat hole 23h, passes through the lateral gap 12 and the lower gap 11, and enters the lower part of the impeller 31. When a moving water flow is formed and the air operation state is reached, the air present in the upper part of the impeller 31 passes through the seat hole 23h, the side gap 12 and the lower gap 11 and the impeller 31 Since the flow of air moving to the lower part is formed, the temperature rise of the electric motor 33 can be suppressed. Moreover, when comprised in this way, when the water level rose and it became the gas-liquid mixing operation instead of the air lock state and the air operation state, the water that flowed in from the seat hole 23h and the air tube 28 flowed in. Air mixes in the side gap 12 and flows into the impeller casing 34 through the lower gap 11. Thus, in the modification shown in FIG. 6A, the device configuration can be simplified. Further, as shown in the modification of FIG. 6B, a through hole 25g may be formed in the suction pipe flange 25f in the lower part of the side gap 12.

  Next, with reference to FIG. 7, the pumping pump 104 which concerns on the 4th Embodiment of this invention is demonstrated. FIG. 7 is a front sectional view of the pumping pump 104. The pumping pump 104 according to the fourth embodiment is further supported to reduce vibration of the pump body 30 with respect to the fixed pipe 20 during operation as viewed from the pumping pump 10 according to the first embodiment (see FIG. 1). A member is provided. Since a so-called column type pump is configured such that a pump body can be attached to and detached from the column, vibration is likely to occur compared to a pump in which an impeller or the like is fixed to a casing. The pumping pump 104 includes a support member that reduces vibrations in consideration of such circumstances.

  The pump pump 104 according to the fourth embodiment is different from the pump 10 according to the first embodiment (see FIG. 1) in that a support pipe 22s as a support member is attached to the column lid 22. That is. The support pipe 22s extends vertically downward with respect to the inner surface of the column lid 22, and the lower end of the support pipe 22s can be pressed by the inner surface of the support pipe 22s. It has an inclined surface that spreads downward. A rubber pad 22r is attached to the inner surface of the support pipe 22s at the inclined surface portion. When the pump body 30 is accommodated in the fixed pipe 20 and the column lid 22 is closed, the inner surface of the support pipe 22s in the inclined surface portion is connected to the upper end corner of the casing of the electric motor 33 via the rubber pad 22r. By pressing, the relative position change (movement due to vibration) between the fixed pipe 20 and the pump main body 30 that can occur when the pumping pump 104 is operated can be reduced. In addition, a member for preventing movement in the rotation direction may be provided on the fitting seat 34 s of the impeller casing 34 or the receiving seat 23 of the column pipe 21 to further suppress the movement.

  FIG. 8A shows a front sectional view of a pumping pump 104A according to a first modification of the fourth embodiment of the present invention. The pumping pump 104 </ b> A is configured to hold the pump body 30 against the fixed pipe 20 using a support member 61 as a support member separate from the fixed pipe 20 and the pump body 30. As shown in the perspective view of FIG. 8B, the support member 61 is configured by connecting two ring members 61c with a plurality of (for example, four) rod-shaped members 61b. The ring member 61 c has an inner diameter that is larger than the outer diameter of the motor casing 337 (see FIG. 1) of the electric motor 33, and the outer shape is slightly smaller than the inner diameter of the column pipe 21. The rod-shaped member 61 b is formed in a length such that the height of the support member 61 is equal to the vertical distance between the upper end of the impeller casing 34 and the inner surface of the column lid 22. A rubber sheet 61r is affixed to the end surface of one ring member 61c constituting the support member 61. In the pump 104A, after the pump main body 30 is accommodated in the fixed pipe 20, the support member 61 is fitted around the pump main body 30 so that the rubber sheet 61r is on the upper side, and then the column lid 22 is attached. Try to close. As a result, the inner surface of the column lid 22 presses the pump main body 30 against the fixed pipe 20 via the support member 61, and the relative relationship between the fixed pipe 20 and the pump main body 30 that may occur when the pumping pump 104A is operated. Change in position (movement due to vibration) can be reduced. Further, the column lid 22 may be provided with a loose mechanism for adjusting the pressing force.

  FIG. 9A shows a front sectional view of a pumping pump 104B according to a second modification of the fourth embodiment of the present invention. The pumping pump 104B includes a lock mechanism 62 as a support member. As shown in the detailed view of FIG. 9B, the lock mechanism 62 includes a lock member 63 in which a protrusion enters and exits from the inner wall of the column pipe 21 into the column pipe 21, and a lock member 63 that moves in and out of the column pipe 21. And a moving link mechanism 64. In the pumping pump 104B, a lock hole 21h is formed on the side surface of the column pipe 21 at a height where the guide vane 35 is located when the pump main body 30 is accommodated in the column pipe 21. A bush 63b is attached to the lock hole 21h, and the lock member 63 is inserted into the hole of the bush 63b. The lock member 63 has a flange formed on the outside, and is inserted into the hole of the bush 63b after the O-ring 63r is attached so that the O-ring 63r is interposed between the flange and the bush 63b. Two L-shaped members 64 a and 64 c constituting the link mechanism 64 are attached to the outside of the column pipe 21 with a space in the vertical direction. The L-shaped members 64a and 64c are respectively the tops of the L-shaped peaks, and both ends of the L-shaped members are pivotally supported by the column pipe 21 with pins or the like so as to be rotatable up and down. The lower end of the L-shaped member 64 a attached to the upper side of the column pipe 21 and the upper end of the L-shaped member 64 c attached to the lower side are respectively turned around each end of the I-shaped member 64 b constituting the link mechanism 64. It is attached with pins and so on. The end portion of the L-shaped member 64 c that is not attached to the I-shaped member 64 b is attached to the collar of the lock member 63. A plurality of (for example, four) lock mechanisms 62 are provided on the outer periphery of the column pipe 21. In the pumping pump 104B, when the upper end of the L-shaped member 64a is in the raised state, the tip of the lock member 63 does not protrude inside the column pipe 21, so that when the pump main body 30 is accommodated in the fixed pipe 20 in this state, Lower the upper end of the L-shaped member 64a. Then, the tip of the lock member 63 protrudes inside the column pipe 21 and presses the impeller casing 34 from the outside. Thereby, the relative movement of the fixed pipe 20 and the pump main body 30 that can be generated when the pumping pump 104B is operated can be reduced. At this time, since the O-ring 63r is interposed between the flange of the lock member 63 and the bush 63b, water is prevented from leaking from the lock hole 21h.

  Next, with reference to FIG. 10, the pumping pump 105 which concerns on the 5th Embodiment of this invention is demonstrated. FIG. 5 is a front sectional view of the pumping pump 105. The pumping pump 105 according to the fifth embodiment is different from the pumping pump 10 according to the first embodiment (see FIG. 1) in that the rotary shaft 32 of the pump body 30 extends downward, and the rotary shaft That is, a bearing 36 that supports the bearing 32 is provided on the upstream side of the impeller 31. The other structure is the same as that of the pumping pump 10 (refer FIG. 1). The bearing 36 is fixed to the impeller casing 34 by a plurality of (for example, four) ribs 37 extending inward from the inner surface of the impeller casing 34. By providing the bearing 36 on the upstream side of the impeller 31, both ends of the impeller 31 are supported so that the load on the bearing on the electric motor 33 side can be reduced and the life of the pumping pump 105 can be extended. it can. In addition, by forming the rib 37 in a rectangular plate shape, the rib 37 can have the function of the rotation preventing plate 41C (see FIG. 3C) of the pumping pump 102C according to the second embodiment. Become.

  Next, with reference to FIG. 11, the pumping pump 106 which concerns on the 6th Embodiment of this invention is demonstrated. FIG. 11 is a front sectional view of the pumping pump 106. The pumping pump 106 according to the sixth embodiment is different from the pumping pump 10 according to the first embodiment (see FIG. 1) in that an air pipe 28 (see FIG. 1) is provided as an air inflow mechanism. The column pipe 21 </ b> A is formed in a double pipe, and air is supplied to the side gap 12 using the space between the double pipes. Specifically, in the pumping pump 106, the column pipe 21A forms an air flow path 29 between the outer pipe 21j disposed on the outer side and the outer pipe 21j on the inner side of the outer pipe 21j. And an inner tube 21k disposed therein. The upper flange 21a is attached so as to spread outward from the upper end of the inner tube 21k, and the upper end of the outer tube 21j is in contact with the upper flange 21a. The lower flange 21b is attached to the lower end of the outer tube 21j. The lower end of the inner pipe 21k is bent inward in the horizontal direction at a position corresponding to the position where the receiving seat 23 (see FIG. 1) is formed in the pumping pump 10 (see FIG. 1), and the impeller casing 34 A receiving seat 21m (corresponding to the receiving seat 23 in FIG. 1) is formed to be fitted to the fitting seat 34s formed on the outer periphery. An intake hole 21i connected to the air flow path 29 is formed on the side surface of the outer pipe 21j above the highest water level HWL. In the example shown in FIG. 11, the intake holes 21 i are opened outside the water tank 98, but may be opened inside the water tank 98. The branch pipe 21p is connected to the inner pipe 21k and extends outward through the outer pipe 21j. The configuration other than these is the same as that of the pumping pump 10 (see FIG. 1). The pumping pump 106 can supply a sufficient amount of air to the lateral gap 12 while being compact.

  Next, with reference to FIG. 12, the water pump system 107 which concerns on the 7th Embodiment of this invention is demonstrated. FIG. 12 is a partial cross-sectional view illustrating the pumping pump system 107. The pumping pump system 107 includes a plurality of the pumping pumps 10 and 102 to 106 according to the first to sixth embodiments described above (including modifications). In the present embodiment, description will be made assuming that three pumps 10 according to the first embodiment are provided (different codes 10A, 10B, and 10C are assigned to the respective pumps for easy distinction). In the pumping pump system 107, pumping pumps 10A, 10B, and 10C having the same size are fixed to the structure 99 at the same height. By providing the pumps 10 </ b> A, 10 </ b> B, and 10 </ b> C having the same size, the pump main bodies 30 can be interchanged with respect to the respective fixed pipes 20. In addition, as long as it is possible to mutually replace the pump main body 30 with respect to each fixed pipe 20, the size may be different.

  And each pumping pump 10A, 10B, 10C differs in the internal diameter of the upper end part of the different diameter pipe | tube 25p of the suction pipe 25, respectively. In the present embodiment, the inner diameter dA of the pumping pump 10A is the smallest, the inner diameter dB of the pumping pump 10B is the middle, and the inner diameter dC of the pumping pump 10C is the largest (see FIG. That is, each inner diameter has a relationship of dA <dB <dC.) As a result, the flow velocity of water near the lower gap 11 is the fastest in the pumping pump 10A, the pumping pump 10B is at an intermediate speed, the pumping pump 10C is the slowest, and the pumping pumps 10A, 10B, and 10C have the same height. The stationary operation water level RWL (see FIG. 1) is the highest for the pumping pump 10A and the lowest for the pumping pump 10C. Accordingly, the time for the steady operation (full speed operation) is the longest for the pumping pump 10C and the shortest for the pumping pump 10A. Thus, since the water level which becomes a steady operation (full-speed operation) can be changed, a sudden water level fluctuation | variation and the load fluctuation | variation of a power supply can be suppressed. Furthermore, by changing the resistance of the air flowing through the air pipe 28 (for example, changing the diameter of the air pipe 28, installing a valve on the air pipe 28, etc.), the water level at which the inflow amount of air is individually changed to achieve steady operation. The same effect can be given by changing the. Since the pumping pump system 107 can interchange the pump main body 30 with respect to the fixed pipe 20, the load applied to each pump main body 30 can be leveled by rotating the pump main body 30. The life of the main body 30 can be extended. In each of the pumps 10A, 10B, and 10C, the pumping pump system 107 has the same structure of the pump body 30 and the column pipe 21, and only by changing the shape of the different diameter pipe 25p of the suction pipe 25, the steady operation water level RWL (see FIG. 1) can be changed, and smooth drainage can be performed against fluctuations in the water level.

  Next, with reference to FIG. 13, the pump pump system 107A which concerns on the modification of the 7th Embodiment of this invention is demonstrated. FIG. 13 is a partial cross-sectional view illustrating the pumping pump system 107A. Compared to the pumping pump system 107 (see FIG. 12), the pumping pump system 107A has the same inner diameter at the upper end portion of the different diameter pipe 25p of the suction pipe 25, while the lower end of the different diameter pipe 25p is The difference is that the pumps 10A, 10B, and 10C are fixed to the structure 99 so that the heights are different. Other configurations are the same as the pumping pump system 107 (see FIG. 12). Since the heights of the lower ends of the different diameter pipes 25p are different from each other, the pumping start timings accompanying the rise in the water level are different from each other. In the pumping pump system 107A, the pumping start time associated with the rise in the water level is the earliest in the pumping pump 10A having the lowest lower end of the different diameter pipe 25p, and then the pumping is started in the order of the pumping pump 10B and the pumping pump 10C. It will be. The operation stop timing when the water level is lowered is, conversely, that the pumping pump 10C is the earliest and stops in the order of the pumping pump 10B and the pumping pump 10A, and therefore the operating time of the pumping pump 10A is the longest. Moreover, the time of steady operation will also differ so as to correspond to the pumping start timing or operating time between the pumps 10A, 10B, 10C. Since the operation time is different, the load on the pumping pump 10A that is operated for the longest time becomes the largest. The pumping pump system 107A can interchange the pump main body 30 with respect to the fixed pipe 20, so that the operation time of each pump main body 30 can be leveled by rotating the pump main body 30, and each pump The load applied to the main body 30 can be leveled, and the life of each pump main body 30 can be extended. In the pumping pump system 107A, in each of the pumping pumps 10A, 10B, and 10C, the structure of the pump body 30 is the same (the length of the pump rotating shaft does not need to be changed even if the suction start position is changed), Above all, the column pipe 21 having a simple configuration is different in length, so that the manufacture is easy, and the pump efficiency can be maintained higher than that of the pumped pump system 107 (see FIG. 12). In addition, you may comprise so that a pumping start time may be changed by changing the installation height (height of the impeller 31) of the pump main body 30, without changing the position of the lower end of the different diameter pipe 25p mutually.

  14, the above-described pumping pump system 107 (FIG. 12) is used even in the column type pumping pump 10 </ b> X in which the air pipe 28 is connected to the suction pipe 25 instead of the column pipe 21. (Refer to FIG. 13) or the pumping pump system 107A (see FIG. 13).

  Next, FIG. 15 shows the pumps 10 and 102 to 106 according to the first to sixth embodiments (including modifications) of the present invention described above (the pump system according to the seventh embodiment of the present invention). 107 and 107A are also included), and a modified example of the suction pipe applicable to the above will be shown. As shown in FIG. 15A, the suction pipe 25A may be configured by attaching a straight pipe 25x to the suction pipe flange 25f instead of the different diameter pipe 25p (see, for example, FIG. 1). Further, as shown in FIG. 15 (b), an end portion where the lower end is smoothly bent upward from the different diameter tube 25p (see, for example, FIG. 1) and the outer end portion is located on the inner side. Alternatively, the suction pipe 25B may be configured by deforming like a streamlined pipe 25y configured to extend further upward and attaching the outer end to the suction pipe flange 25f. In this case, when the pump main body 30 is accommodated in the fixed pipe 20, a part of the impeller casing 34 passes through the suction pipe flange 25f and is positioned in the suction pipe 25B. Also in this case, the pump body 30 is positioned with respect to the column pipe 21 at a position where the lower gap 11 and the side gap 12 are formed. As shown in FIG. 15B, when the side gap 12 is formed between the suction pipe 25B and the impeller casing 34, the air pipe 28 is connected to the suction pipe 25B. When the suction pipe 25B having the streamlined pipe 25y is adopted, the loss (pressure loss) on the suction side can be reduced, and the side gap 12 that can distribute the air substantially uniformly around the impeller casing 34 is formed. can do. The lower portion of the suction pipe 25B may be filled with a filling (not shown) so that water does not enter the bent lower end portion of the suction pipe 25B, or the bent lower end portion of the suction pipe 25B may be You may form the drain hole (not shown) which drains the water which entered inside. FIG. 15 (c) shows an example in which a turn prevention plate 41A formed of a right triangle or trapezoidal plate is provided in the side gap 12 when the suction pipe 25B is employed. In this case, the turning prevention plate 41A can be formed in various shapes according to the shape of the suction pipe 25B in which the side gap 12 is formed. Although illustration is omitted, even when the suction pipe 25B is employed, the lower gap 11 is formed large as shown in FIG. 2 or FIG. 11 may be provided with a rectangular anti-rotation plate 41, or as shown in FIG. 3C, the anti-rotation plate 41C formed of a rectangular plate may be disposed in the impeller casing 34 upstream of the impeller 31. May be provided.

  As shown in FIG. 16, the pumps 10 and 102 to 106 according to the above-described first to sixth embodiments (including modifications) of the present invention (pumping according to the seventh embodiment of the present invention). In the pump systems 107 and 107A), a shutoff valve 58 capable of shutting off the flow path is provided in the air pipe 28 (in the case of the pumping pump 106 shown in FIG. 11, the intake hole 21i). A water level detector 59 and a control device 50A for detecting the water level in the water tank 98 are provided, and the shutoff valve 58 is controlled to open and close in accordance with the detected water level, and the impeller casing 34 is opened via the side gap 12 and the lower gap 11. You may comprise so that the timing which introduces air in may be controlled.

  Moreover, as shown in FIG. 17, the pumps 102, 102A, 102C, etc. (FIG. 2, FIG. 3 (a), FIG. 3 (b)) according to the above-described second embodiment (including modifications) of the present invention. 15 (c)), the air tube 28 may be protruded into the side gap 12, and the portion of the air tube 28 existing in the side gap 12 and the rotation preventing member may be configured integrally. In the example shown in FIG. 17A, the anti-swivel plate 41E having a thickness that is smaller than the diameter of the air tube 28 and that is longer than the diameter of the air tube 28 is provided at the front end opening of the air tube 28. The rotation prevention plate 41E is attached so that the portion is blocked by the thickness of the rotation prevention plate 41E and the longitudinal direction of the rotation prevention plate 41E is vertical. In the example shown in FIG. 17B, a plate-like anti-rotation plate 41F is attached to the side wall portion of the air pipe 28 so as to stand in the vertical direction. Such a modified example in which the part of the air pipe 28 and the swirl prevention member that are present in the side gap 12 are configured integrally is the configuration of the pumping pump systems 107 and 107A according to the seventh embodiment of the present invention. It can also be applied to elements.

  Further, a temperature rise prevention means (including a control device 50 (including a sequence for stopping the electric motor 33 when the temperature rises), an ammeter 51, an electrode rod 52, and a bypass valve 53v as provided in the above-described pumping pump 103 (see FIG. 4). The bypass pipe 53 provided with the exhaust pipe 54 and the exhaust pipe 54 provided with the exhaust valve 54v are connected to the air pipe 28 in which the air pipe 28 is connected to the suction pipe 25 instead of the column pipe 21, as shown in FIG. The present invention may be applied to a column type pumping pump 10X, and although not shown, it may be applied to a submersible motor pump that is not a column type.

  The characteristic structures of each of the pumps 102 to 106 according to the second to sixth embodiments (including modifications) of the present invention described above are arbitrary two or more (all) May be applied to the pumping pump 10 according to the first embodiment of the present invention in a superimposed manner.

It is front sectional drawing of the pumping pump which concerns on the 1st Embodiment of this invention. It is front sectional drawing of the pumping pump which concerns on the 2nd Embodiment of this invention. It is a figure which shows a part of front cross section of the pumping pump which concerns on the modification of the 2nd Embodiment of this invention. (A) is a figure which shows a 1st modification, (b) is a figure which shows a 2nd modification, (c) is a figure which shows a 3rd modification. It is front sectional drawing of the pumping pump which concerns on the 3rd Embodiment of this invention. It is a flowchart explaining operation | movement of the pumping pump which concerns on the 3rd Embodiment of this invention. It is a figure which shows a part of front cross section of the pumping pump which concerns on the modification of the 3rd Embodiment of this invention. (A) is a figure which shows a 1st modification, (b) is a figure which shows a 2nd modification. It is front sectional drawing of the pumping pump which concerns on the 4th Embodiment of this invention. It is a figure explaining the pumping pump which concerns on the 1st modification of the 4th Embodiment of this invention. (A) is front sectional drawing, (b) is a perspective view of a support member. It is a figure explaining the pumping pump which concerns on the 2nd modification of the 4th Embodiment of this invention. (A) is front sectional drawing, (b) is detail drawing of a locking mechanism. It is front sectional drawing of the pumping pump which concerns on the 5th Embodiment of this invention. It is front sectional drawing of the pumping pump which concerns on the 6th Embodiment of this invention. It is a fragmentary sectional view of the pumping-up pump system concerning a 7th embodiment of the present invention. It is a fragmentary sectional view of the pumping pump system which concerns on the modification of the 7th Embodiment of this invention. It is front sectional drawing which shows the example of the pumping pump applicable to the pumping pump system which concerns on the 7th Embodiment of this invention. It is sectional drawing which shows the modification of the suction pipe applicable to the pumping pump which concerns on embodiment of this invention. It is a fragmentary sectional view which shows the modification of the air inflow mechanism applicable to the pumping pump which concerns on embodiment of this invention. It is a fragmentary perspective view which shows another structural example of a rotation prevention member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pumping pump 11 Lower clearance 12 Side clearance 20 Fixed pipe 21 Column pipe 22s Support pipe 25 Suction pipe 28 Air pipe 29 Air flow path 30 Pump main body 31 Impeller 32 Rotating shaft 33 Electric motor 34 Impeller casing 36 Bearings 41, 41A, 41C Turning prevention member 50 Control device 61 Support member 62 Lock mechanism 102-106 Pumping pump 107, 107A Pumping pump system

Claims (8)

A pump body having an impeller, an electric motor that rotates the impeller, and an impeller casing that surrounds the impeller so as to cover the rotation direction;
A cylindrical column pipe in which the pump main body is accommodated so as to be able to be taken in and out, and attached to the lower end of the column pipe arranged so that the axis is vertical, and upward toward the impeller of the accommodated pump main body A fixed pipe having a suction pipe for flowing liquid to the impeller casing of the accommodated pump body, and forming a downward gap between the suction pipe in the vertical direction and the horizontal direction in the horizontal direction. A fixed pipe that forms a lateral gap communicating with the inside of the impeller casing via the lower gap between the fixed pipe;
An air inflow mechanism for supplying air to the side gap;
Pumping liquid. A rotation preventing member that is attached to the inner surface of the column pipe outside the impeller casing of the pump body housed in the fixed pipe and prevents the liquid pumped by the rotation of the impeller from rotating;
The pump according to claim 1. Swirling that prevents swirling of the liquid pumped by rotation of the impeller below the impeller on the inner surface of the impeller casing of the pump body accommodated in the fixed pipe or on the inner surface of the suction pipe Providing a prevention member;
The pump according to claim 1. Provided with a temperature rise prevention means for preventing the temperature of the motor from rising when the impeller rotates to enter an air lock state or an air operation state;
The pump according to any one of claims 1 to 3. The fixed pipe has a support member that reduces movement due to vibration during operation of the pump body with respect to the fixed pipe;
The pump according to any one of claims 1 to 4. The pump body has a bearing on the upstream side of the impeller for supporting a rotating shaft for rotating the impeller;
The pump according to any one of claims 1 to 5. A plurality of pumps according to any one of claims 1 to 6;
Each of the pump bodies is configured to be interchangeable with each of the fixed pipes;
Each said pump is configured to start steady operation at a different liquid level;
Pumping liquid system. An electric motor that rotates a rotating shaft arranged in a vertical direction around the axis;
An impeller attached to the rotating shaft;
A column pipe that houses the electric motor and the impeller, and causes liquid to flow upward by rotation of the impeller;
A suction pipe connected to the column pipe on the upstream side of the impeller and forming a flow path for flowing liquid toward the impeller;
An air inflow mechanism for supplying air into the column pipe or the suction pipe upstream from the impeller;
Control means for controlling the electric motor so as to avoid a failure due to overheating when the impeller rotates to enter an air lock state or an air operation state;
Pumping liquid.

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