JP6556527B2 - Pump device - Google Patents

Description

  The present invention relates to a pump device.

  In recent years, sewers have been developed like spider webs, especially in urban areas in developed countries. For this reason, the pump apparatus which transfers the contaminated water of a sewer has become an important facility for city life. The contaminated water in the sewage system transported by the pump device may contain not only liquid but also solid foreign matters such as clothes, strings, wood, metal products, vinyls, or ceramics. These foreign substances include those of various materials, sizes, and shapes. Even if such foreign matter enters the pump of the pump device, the foreign matter can pass through the impeller of the pump device when the size of the foreign matter contained in the contaminated water is small. On the other hand, when the size of the foreign matter contained in the contaminated water is large, the foreign matter may be clogged or entangled in the impeller, causing the performance of the pump device to deteriorate and the life of the pump device to be shortened. Therefore, when foreign matters are mixed in the contaminated water, maintenance costs such as repair and replacement of the pump device increase. For this reason, countermeasures against contamination by foreign substances have been demanded.

  Examples of the method for removing the foreign matter include collection by a filter. However, since the size of the foreign matter contained in the sewer is large and the amount thereof is large, the filter is clogged in a short time. For this reason, conventionally, a pump device having few impeller blades (for example, one or two) is used so that foreign matters can easily pass through the impeller of the pump device. There has also been proposed a grinder provided with a foreign object to be introduced into the pump. Further, there has been proposed one that adjusts the number of rotations of the pump so that the pump device is not clogged according to the size and shape of foreign matter flowing into the pump device.

Japanese Patent Laid-Open No. 56-129797 JP 58-38396 A JP 2006-283597 A

  However, even if the above measures are taken, foreign substances contained in the sewer include various materials, sizes, and shapes, so it is difficult to pass the impeller without clogging the foreign substances. In some cases.

  The present invention has been made in view of at least a part of the above problems, and an object of the present invention is to provide a pump device having a simple configuration capable of suppressing pump troubles due to foreign matter in a pump device for transferring a fluid containing foreign matter. And

The pump device of the present invention includes a pump for transferring a fluid, an inflow pipe connected to the suction port of the pump, an outflow pipe connected to the discharge port of the pump, and a connection pipe connected to the inflow pipe and the outflow pipe. And a jet pump unit. The jet pump unit can be switched between a first state in which the connection pipe is closed and a second state in which the connection pipe is opened and the opening degree of the outflow pipe is reduced.
With this configuration, the jet pump unit can transfer the fluid in the connection pipe to the outflow pipe using the fluid discharged from the pump as the working fluid in the second state. Thereby, when the foreign material which is not preferable to penetrate | invade into a pump is contained in a fluid, a jet pump part can be made into a 2nd state and it can suppress that a foreign material penetrate | invades into a pump. Therefore, troubles of the pump due to foreign matters can be suppressed. In addition, since the jet pump unit uses the fluid discharged from the pump as the working fluid, the jet pump unit can have a simpler configuration than that provided with a plurality of pumps.

Moreover, in the 2nd state of a jet pump part, you may make small the opening degree of the outflow piping in the connection part of a connection pipe and an outflow piping. In this case, the jet pump unit may include a flap valve that is provided at a connection part between the connection pipe and the outflow pipe and is rotatable with the connection part as one end. In the first state, the flap valve may close the connecting pipe by rotating the flap valve in the first direction. In the second state, the flap valve may reduce the opening degree of the outflow pipe by rotating the flap valve in the second direction.
If it carries out like this, a jet pump part can be comprised with a simple structure.

The pump device has an inlet connected to the inlet pipe, a first outlet connected to the inlet of the pump, and a second outlet connected to the connecting pipe, and is introduced from the inlet. You may further provide the foreign material guide part which guides the foreign material contained in the fluid to a 2nd outflow port.
In this way, it is possible to further suppress foreign matters from entering the pump.

Further, the foreign matter guide unit may guide the foreign matter to the second outlet using a specific gravity difference between the fluid and the foreign matter.
In this way, the foreign matter guide unit can be configured with a simple configuration.

In addition, the pump device may further include a foreign matter detection unit and a control unit. The foreign matter detector is provided upstream of the foreign matter guide and detects whether or not the fluid contains foreign matter. A control part makes a jet pump part a 2nd state, when the foreign material detection part detects that the foreign material is contained in the fluid.
In this way, when the foreign matter is not included in the fluid, the fluid can be transferred by the pump with the jet pump portion in the first state. Moreover, when the foreign material is contained in the fluid, the jet pump part can be set to the second state, and pump troubles due to the foreign material can be suppressed.

The pump device may further include a changeover switch capable of switching the state of the jet pump unit regardless of detection by the foreign object detection unit.
In this way, it is possible to switch between operation and stop of the jet pump, for example, based on the judgment of the administrator.

The pump, the inflow pipe, the outflow pipe, the connection pipe, and the jet pump unit may constitute a set of pump units. A plurality of sets of pump units may be connected in series, and the outflow piping of the final set of pump units may be provided with a foreign matter collecting section that collects foreign matters contained in the fluid.
In this way, management of the foreign material collecting part can be facilitated.

It is a figure which shows schematic structure of the pump apparatus of this embodiment. It is a figure which expands and shows the flap valve periphery of FIG. It is a figure which shows schematic structure of a jet pump. It is a figure which shows a pump apparatus when a flap valve is rotating in the 1st direction. It is a figure which shows schematic structure of the pump apparatus of 1st Embodiment which showed the foreign material guide part concretely. It is a figure which shows the pump apparatus of 2nd Embodiment which showed the foreign material guide part concretely. It is a figure which shows the pump apparatus of 3rd Embodiment which showed the foreign material guide part concretely. It is a figure which expands and shows the foreign material guide part of 3rd Embodiment. It is a figure which shows the pump apparatus of 4th Embodiment which showed the foreign material guide part concretely. It is a figure which shows the foreign material guide part of 4th Embodiment from another direction. It is a figure which shows the structure outline of the pump apparatus of 5th Embodiment. It is a figure which shows an example of a foreign material collection part. It is a figure which shows another example of a foreign material collection part. It is a figure which shows the structure outline of the pump apparatus of 6th Embodiment. It is a figure which shows the structure outline of the pump apparatus of 7th Embodiment. It is a figure which shows the structure outline of the pump apparatus of 8th Embodiment. It is a figure which shows the structure outline of the jet pump part periphery of 9th Embodiment. It is a figure which shows the structure outline of the jet pump part periphery of 9th Embodiment. It is a figure which shows the structure outline of the jet pump part periphery of 10th Embodiment. It is a figure which shows the structure outline of the jet pump part periphery of 10th Embodiment. It is a figure which shows the structure outline of the jet pump part periphery of 11th Embodiment. It is a figure which shows the structure outline of the jet pump part periphery of 11th Embodiment.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In addition, the following description shows an example to the last and is not the meaning which limits the technical scope of this invention to the following embodiment. Moreover, the component which comprises each embodiment can be combined arbitrarily, and is not limited to the combination demonstrated below.

<First Embodiment>
FIG. 1 is a diagram illustrating a schematic configuration of a pump device according to the present embodiment. In addition, the triangle in FIG. 1 schematically shows the foreign matter Fm contained in the fluid. As shown in FIG. 1, the pump device 10 includes a pump 12 that transfers fluid from an inflow pipe 13 to an outflow pipe 14. The pump 12 may have any configuration as long as it can transfer a fluid. In addition, it is preferable that the pump 12 extremely reduces the number of impellers (not shown) to about 1 or 2 sheets. By so doing, it is possible to prevent troubles such as clogging of the pump 12 even when foreign matter from the inflow pipe 13 unintentionally enters the pump 12. The pump 12 may include a grinder that pulverizes foreign matter that enters the pump 12.

  A foreign matter guide 20 is provided in the inflow pipe 13 upstream of the pump 12. In the foreign material guide part 20, an inflow port 21, a first outflow port 22, and a second outflow port 23 are formed. The inlet 21 is connected to the inlet pipe 13, and the first outlet 22 is connected to the inlet 12 a of the pump 12. The second outlet 23 is connected to the connecting pipe 16 and is connected to the downstream of the pump 12 via the connecting pipe 16. With such a configuration, the fluid that has flowed into the foreign matter guide 20 from the inlet 21 flows out from the first outlet 22 toward the pump 12, or flows out from the second outlet 23 to the connection pipe 16. Will head.

  A connection pipe 16 is connected to the outflow pipe 14 downstream of the pump 12. One end of the connection pipe 16 is connected to the outflow pipe 14, and the other end is connected to the second outlet 23 of the foreign matter guide 20. The connecting pipe 16 is preferably connected to the discharge port 12b side of the pump 12 so as to have an acute angle (θc <90 °). A flap valve 42 is attached to the connecting portion 17 between the connecting pipe 16 and the outflow pipe 14.

  FIG. 2 is an enlarged view showing the periphery of the flap valve of FIG. The flap valve 42 is formed in a plate shape having a plate surface in a direction perpendicular to the paper surface of FIG. 2, and the side surface of the flap valve 42 is shown in FIGS. 1 and 2. As shown in FIG. 2, one end of the flap valve 42 is rotatably attached to an end portion 17 a close to the discharge port 12 b of the pump 12 in the connection portion 17 between the connection pipe 16 and the outflow pipe 14. Specifically, the flap valve 42 rotates in a direction perpendicular to the plane including the flow direction Aa of the outflow pipe 14 and the fluid flow direction Ab of the connection pipe 16 (a direction perpendicular to the plane of FIG. 2). It has a shaft 44 and rotates around the rotation shaft 44. In the present embodiment, the flap valve 42 is rotated by an actuator 48 (for example, a motor). However, without providing the actuator 48, the flap valve 42 may be rotated by an operation of an administrator or the like.

  When the flap valve 42 rotates in the first direction (counterclockwise in FIG. 2), it covers the connecting pipe 16 (broken line in FIG. 2). At this time, the flap valve 42 rotates to a position where the outflow pipe 14 (the discharge port 12b of the pump 12) is opened and the connection pipe 16 is closed. On the other hand, when the flap valve 42 rotates in the second direction (clockwise in FIG. 2), it covers the outflow pipe 14 (discharge port 12b of the pump 12) (solid line in FIG. 2). At this time, the flap valve 42 is rotated to a position where the opening degree (flow path area) of the outflow pipe 14 is reduced to form the orifice 46 and the connection pipe 16 is opened. The flap valve 42 constitutes a part of the jet pump unit 40. In the present embodiment, the outflow pipe 14, the connection pipe 16, and the flap valve 42 constitute the jet pump unit 40. Here, the operation principle of a general jet pump will be described.

  FIG. 3 is a diagram showing a schematic configuration of the jet pump. As shown in FIG. 3, the jet pump 100 includes a jet nozzle 102 and a suction pipe 104 that each form a flow path. The discharge port 103 of the jet nozzle 102 and the discharge port 105 of the suction pipe 104 are arranged adjacent to each other in the same direction. Further, the discharge port 103 of the jet nozzle 102 is an orifice having a small diameter. The jet nozzle 102 and the suction pipe 104 communicate with the discharge pipe 106.

  In the jet pump 100, a high-pressure fluid is applied to the jet nozzle 102 to discharge a high-speed jet from the jet nozzle 102. Then, the fluid in the suction pipe 104 is drawn into the discharge pipe 106 along with the jet flow from the jet nozzle 102, and is mixed with the jet flow from the jet nozzle 102 in the discharge pipe 106. In this manner, the jet pump 100 pumps the fluid in the suction pipe 104 using the jet flow from the jet nozzle 102 as the working fluid.

  Returning to FIG. 1 and FIG. The flap valve 42 rotates in the second direction to form the orifice 46, thereby bringing the jet pump unit 40 into a jet pump state (second state). As described above, the flap valve 42 is provided in the outflow pipe 14 downstream of the pump 12. For this reason, when the orifice 46 is formed in the outflow pipe 14 by the flap valve 42, the fluid from the pump 12 is discharged from the orifice 46 as a high-speed jet. Thereby, the fluid in the connection pipe 16 is drawn with the jet flow from the orifice 46. That is, when the jet pump unit 40 is in the jet pump state, the flap valve 42 and a part of the outflow pipe 14 correspond to the jet nozzle 102 in FIG. 3, and the connection pipe 16 corresponds to the suction pipe 104 in FIG. As described above, the jet pump unit 40 can pressure-feed the fluid in the connection pipe 16 using the jet flow from the orifice 46 as a working fluid.

  FIG. 4 is a diagram illustrating the pump device when the flap valve is rotating in the first direction. The flap valve 42 rotates in the first direction to open the outflow pipe 14 and close the connection pipe 16, thereby bringing the jet pump unit 40 into a stopped state (first state). At this time, the fluid discharged from the pump 12 flows into the outflow pipe 14 as it is, and no fluid flows from the connection pipe 16 into the outflow pipe 14.

  Thus, when the jet pump unit 40 is stopped, the fluid from the inflow pipe 13 is transferred to the outflow pipe 14 through the pump 12 (see FIG. 4). On the other hand, when the jet pump unit 40 is in the jet pump state, a part of the fluid from the inflow pipe 13 passes through the pump 12 and is transferred from the orifice 46 to the outflow pipe 14, and the remaining part passes through the connection pipe 16 to the outflow pipe 14. Be transported. Here, in the jet pump state, the flow rate transferred to the outflow pipe 14 through the orifice 46 is small, and a lot of fluid is transferred to the outflow pipe 14 through the connection pipe 16. For this reason, in the state of a jet pump, compared with the case where all the fluid passes the pump 12, it can suppress that the foreign material contained in the fluid penetrate | invades into the pump 12. FIG. Therefore, troubles of the pump 12 due to foreign matters can be suppressed. Moreover, in this embodiment, the pump apparatus 10 is provided with the foreign material guide part 20 which guides a foreign material to the 2nd outflow port 23 to which the connection pipe 16 was connected. For this reason, it can suppress suitably that a foreign material penetrate | invades a pump by making the jet pump part 40 into a jet pump state.

  Next, the foreign matter guide unit 20 will be described in detail. The foreign material guide 20 guides the foreign material to the second outlet 23 to which the connection pipe 16 is connected so that the foreign material contained in the fluid from the inflow pipe 13 does not enter the pump 12. The foreign matter guide unit 20 guides foreign matter contained in the fluid from the inlet 21 to the second outlet 23 by applying fluid action or fluid force. Specifically, the foreign material guide unit 20 guides the foreign material contained in the fluid to the second outlet 23 using the specific gravity difference between the fluid and the foreign material.

  FIG. 5 is a diagram illustrating a schematic configuration of the pump device according to the first embodiment, which specifically illustrates the foreign matter guide portion. In FIG. 5, the actuator 48 and the like are not shown. The foreign matter guide unit 20 of the first embodiment guides the foreign matter Fm to the second outlet 23 using the sedimentation of the foreign matter Fm with respect to the fluid when the specific gravity of the foreign matter Fm is larger than that of the fluid.

  As shown in FIG. 5, the foreign matter guide unit 20 includes a main body 24 in which an inflow port 21, a first outflow port 22, and a second outflow port 23 are formed to define a fluid flow path. The inflow port 21 and the first outflow port 22 are formed vertically above the main body 24. On the other hand, the second outlet 23 is formed vertically below the main body 24. That is, a space that extends vertically downward from the first outlet 22 is formed in the main body 24 of the foreign matter guide portion 20, and the second outlet 23 is formed vertically below the first outlet 22. Yes. With such a configuration, when the specific gravity of the foreign matter Fm is larger than that of the fluid, the foreign matter Fm that has entered the main body 24 from the inflow port 21 settles inside the main body 24 and is guided to the second outflow port 23. In the present embodiment, the inflow port 21 is formed vertically above the main body 24, but is not limited to this example, and may be formed, for example, vertically below the main body 24.

  In the foreign material guide unit 20, when the jet pump unit 40 is in a jet state, the fluid in the connection pipe 16 is pumped and the second outlet 23 of the foreign material guide unit 20 has a negative pressure. As a result, part of the fluid that has flowed into the foreign matter guide 20 from the inlet 21 and the foreign matter Fm flow out from the second outlet 23. Then, the fluid and the foreign matter Fm that have flowed out from the second outlet 23 go to the outflow pipe 14 without entering the pump 12.

  Returning to FIG. The control unit 50 controls the overall operation of the pump device 10 and also functions as a foreign object detection unit 51 and a flap valve control unit 52. In the present embodiment, the control unit 50 is configured as an information processing apparatus having a CPU and a memory, and a CPU executes a program stored in the memory to realize a required function. However, at least a part of the function of the control unit 50 may be realized by a dedicated hardware circuit. Each function of the control unit 50 may be distributed and arranged in two or more devices.

  The foreign matter detection unit 51 detects whether or not the fluid flowing through the inflow pipe 13 contains foreign matter that is not preferable to enter the pump 12 (hereinafter referred to as “predetermined foreign matter”). The foreign object detection unit 51 may have any configuration as long as it can detect a foreign object. For example, the foreign matter detector 51 may detect foreign matter contained in the fluid using light such as a laser, sound waves such as ultrasonic waves, or electromagnetic waves such as X-rays. Moreover, the foreign material detection part 51 may be installed in the inflow piping 13, and may detect the foreign material contained in the fluid using the mechanical sensor turned on / off by contacting with a foreign material. Further, the foreign matter detection unit 51 may perform image analysis using an underwater camera or the like installed in the inflow pipe 13. Alternatively, the foreign matter detection unit 51 may perform image analysis using a camera or the like that images the inside of the inflow pipe 13 from the outside through a partially transparent window formed in the inflow pipe 13. Further, the foreign object detector 51 may detect a predetermined foreign object based on the material of the foreign object.

  The foreign matter detection unit 51 detects that a predetermined foreign matter is contained in the fluid when, for example, a foreign matter having a size larger than a predetermined size is included in the inflow pipe 13. For example, the foreign object detection unit 51 detects that a predetermined foreign object is included when the length of the longest part of the foreign object or the representative dimension is longer than a predetermined length. Here, the predetermined size (for example, length) may be determined based on the structure of the pump 12 such as the interval between the impellers of the pump 12.

  The flap valve control unit 52 controls the actuator 48 that rotates the flap valve 42 based on the detection by the foreign matter detection unit 51. Specifically, when the foreign matter detector 51 detects that the fluid flowing through the inflow pipe 13 does not contain a predetermined foreign matter, the flap valve controller 52 rotates the flap valve 42 in the first direction (see FIG. 4). ). As a result, the jet pump unit 40 is stopped, and the fluid in the inflow pipe 13 is guided to the pump 12. At this time, foreign matter and fluid that do not pose a problem even if they enter the pump 12 pass through the pump 12 and are transferred to the outflow pipe 14. On the other hand, when the foreign substance detection unit 51 detects that a predetermined foreign substance is included in the fluid flowing through the inflow pipe 13, the flap valve control unit 52 rotates the flap valve 42 in the second direction (see FIG. 1). As a result, the jet pump unit 40 enters a jet pump state, and predetermined foreign matter contained in the inflow pipe 13 is transferred to the outflow pipe 14 through the connection pipe 16. Therefore, foreign matter that is not preferable to enter the pump 12 can be transferred to the outflow pipe 14 without entering the pump 12.

  In the present embodiment, a changeover switch 19 that can switch the rotational position of the flap valve 42 is provided separately from the control unit 50. For this reason, the administrator of the pump apparatus 10 can rotate the flap valve 42 by the changeover switch 19 regardless of the detection by the foreign matter detection unit 51. Thereby, for example, it is possible to cope with a case where a defect occurs in the foreign object detection unit 51. The changeover switch 19 may drive the actuator 48 or physically rotate the flap valve 42.

  In the pump device 10 described above, the foreign matter contained in the fluid is guided by the foreign matter guide portion 20 to the second outlet 23 to which the foreign matter collecting portion 30 is connected. Thereby, it can suppress that a foreign material penetrate | invades into the pump 12. FIG. Therefore, troubles of the pump 12 such as a decrease in performance caused by foreign matters entering the pump 12 can be suppressed. In addition, the maintenance frequency of the pump 12 can be reduced. And the fluid from the 2nd outflow port 23 is pumped by the jet pump part 40 which makes the fluid discharged from the pump 12 the working fluid. For this reason, in order to transfer the fluid of the 2nd outflow port 23, the structure including a control system can be simplified compared with what provides a pump newly.

<Second Embodiment>
FIG. 6 is a view showing the pump device of the second embodiment specifically showing the foreign matter guiding portion. In the following second to fourth embodiments, the foreign matter guide unit 20 and the like are different from those of the first embodiment. Therefore, in the second to fourth embodiments, only portions different from the first embodiment will be described, and description of overlapping portions will be omitted.

  As shown in FIG. 6, the pump device 10A of the second embodiment guides the foreign matter Fm to the second outlet 23A using the floating of the foreign matter Fm with respect to the fluid when the specific gravity of the foreign matter Fm is smaller than the fluid. . As shown in FIG. 6, the foreign matter guide portion 20A includes a main body 24A in which an inflow port 21A, a first outflow port 22A, and a second outflow port 23A are formed to define a fluid flow path. The inflow port 21A and the first outflow port 22A are formed vertically below the main body 24A. On the other hand, the second outlet 23A is formed vertically above the main body 24A. That is, the main body 24A of the foreign matter guide portion 20A is formed with a space extending vertically upward from the first outlet 22A, and the second outlet 23A is formed vertically upward from the first outlet 22A. Yes. With such a configuration, when the specific gravity of the foreign matter Fm is smaller than that of the fluid, the foreign matter Fm that has entered the main body 24A from the inlet 21A floats inside the main body 24A and is guided to the second outlet 23A. In the second embodiment, the inflow port 21A is formed vertically below the main body 24A, but is not limited to such an example, and may be formed vertically above the main body 24A, for example.

  The pump device 10A according to the second embodiment described above can achieve the same effects as the pump device 10 according to the first embodiment.

<Third Embodiment>
FIG. 7 is a view showing the pump device of the third embodiment specifically showing the foreign matter guide portion. As shown in FIG. 7, the pump apparatus 10B of the third embodiment guides the foreign matter Fm to the second outlet 23B by utilizing the fact that the relatively large foreign matter Fm is likely to go straight due to inertia. As shown in FIG. 7, the foreign matter guide portion 20B includes a main body 24B in which an inflow port 21B, a first outflow port 22B, and a second outflow port 23B are formed to define a fluid flow path. And in the foreign material guide part 20B of 3rd Embodiment, the 2nd outflow port 23B is formed on the extension line | wire of the inflow direction Af of the fluid from the inflow port 21B. On the other hand, the first outlet 22B is formed at a position deviating from the inflow direction Af of the fluid from the inlet 21B.

  FIG. 8 is an enlarged view of the foreign matter guide portion of the third embodiment. The main body 24B of the foreign matter guide portion 20B has a tapered portion 25B formed in a tapered shape whose diameter gradually increases as the distance from the inflow port 21B increases, and a cylindrical portion 26B having a diameter D2 larger than the diameter D1 of the inflow port 21B. The cylindrical portion 26B is formed in a cylindrical shape having a bottom portion 27B, and the first outlet 22B is formed on the outer peripheral surface. The main body 24B has a foreign matter guide tube 28B penetrating the bottom portion 27B inside the cylindrical portion 26B. The foreign matter guide tube 28B is formed such that the internal flow path is on an extension line in the fluid inflow direction Af from the inflow port 21B, and communicates with the second outflow port 23B.

  Here, it is preferable that the taper portion 25B of the foreign matter guide portion 20B has an incident angle (taper angle) θt of 5 to 15 °. However, the present invention is not limited to this example, and the incident angle θt may be set arbitrarily (0 to 180 °).

  Moreover, it is preferable that the diameter D2 of the cylindrical part 26B of the foreign matter guide part 20B is formed to be 1.1 to 5.0 times the diameter D1 of the inflow port 21B. Furthermore, the diameter D3 of the foreign matter guide tube 28B of the foreign matter guide portion 20B is preferably formed to be 0.8 to 2.0 times the diameter D1 of the inflow port 21B. And the foreign material guide part 20B of 3rd Embodiment guides a foreign material especially suitably, when the average particle diameter (representative dimension) of a foreign material is 1/4 or more with respect to the aperture diameter D2 of the cylindrical part 26B. be able to.

  With such a configuration, in the foreign matter guide portion 20B of the third embodiment, when fluid and foreign matter enter the main body 24B from the inlet 21B, a relatively large foreign matter Fm is guided to the foreign matter guide tube 28B by inertia force (FIG. 7). reference). For this reason, also in the pump apparatus 10B of 3rd Embodiment, there can exist an effect similar to the pump apparatuses 10 and 10A of 1st, 2nd embodiment.

<Fourth embodiment>
FIG. 9 is a view showing the pump device of the fourth embodiment specifically showing the foreign matter guiding portion. As shown in FIG. 9, the pump device 10C of the fourth embodiment guides the foreign matter Fm to the second outlet 23C by utilizing the fact that the specific gravity of the foreign matter Fm is larger than that of the fluid. As shown in FIG. 9, the foreign matter guide portion 20 </ b> C includes a main body 24 </ b> C in which an inflow port 21 </ b> C, a first outflow port 22 </ b> C, and a second outflow port 23 </ b> C are formed to define a fluid flow path. And in the foreign material guide part 20C of 4th Embodiment, the main body 24C produces a swirl flow in the fluid which flowed in from 21 C of inflow ports.

  FIG. 10 is a diagram illustrating the foreign matter guide unit of the fourth embodiment from another direction. As shown in FIGS. 9 and 10, the main body 24 </ b> C of the foreign matter guide portion 20 </ b> C is provided inside the first cylindrical portion 25 </ b> C and the first cylindrical portion 25 </ b> C and is positioned concentrically with the first cylindrical portion 25 </ b> C. The second cylindrical portion 26C is integrally formed. In the first cylindrical portion 25C on the outer peripheral side, an inflow port 21C is formed on one end side in the cylindrical axis direction, and a second outflow port 23C is formed on the other end side in the cylindrical axis direction. Here, the inflow port 21C is formed in the main body 24 so that the fluid from the inflow port 21C swirls inside the main body 24C. The second cylindrical portion 26C on the inner peripheral side communicates with the first outlet 22C.

  With such a configuration, in the foreign matter guide portion 20C of the fourth embodiment, when a fluid enters the main body 24C from the inflow port 21C, a swirling flow is generated inside the main body 24C. As a result, the fluid having a small specific gravity flows out from the first outlet 22C through the second cylindrical portion 26C on the inner peripheral side, and the foreign matter Fm having a large specific gravity flows on the outer peripheral side of the first cylindrical portion 25C to the second outlet 23C. Guided. For this reason, also in the pump apparatus 10B of 4th Embodiment, there can exist an effect similar to the pump apparatuses 10-10B of 1st-3rd embodiment.

<Fifth Embodiment>
FIG. 11 is a diagram illustrating a schematic configuration of a pump device according to the fifth embodiment. The pump device 10D of the fifth embodiment includes a plurality of sets of pump units 100A to 100X in which the pump device 10 of the first embodiment is a set of pump units. The plurality of sets of pump units 100A to 100X are connected in series. For example, when viewed from the upstream side, the outflow pipe 14 of the first set of pump units 100A is connected to the inflow pipe 13 of the second set of pump units 100B. When the fluid contains foreign matter, the foreign matter is guided to the second outlet 23 in the foreign matter guide portion 20 of each pump unit 100 and transferred to the next set of pump units 110 through the connection pipe 16. With such a configuration, the fluid can be transferred over a wide area.

  And the foreign material collection part 30 which collects a foreign material is provided in the downstream (outflow piping 14) of the pump unit 100X connected to the most downstream among several sets of pump units 100A-100X. Thus, the foreign material collection part 30 which collects a foreign material is provided in one place with respect to several sets of pump units 100A-100X, and the place of the foreign material collection part 30, an installation, etc. may be decreased. it can. Moreover, management of the foreign material collection part 30 becomes easy.

  FIG. 12 is a diagram illustrating an example of the foreign matter collecting unit. As shown in FIG. 12, the foreign material collection part 30 collects the foreign material Fm using the sedimentation of the foreign material Fm with respect to the fluid similarly to the foreign material guide part 20 of 1st Embodiment. Specifically, the foreign material collection part 30 has the main body 32 in which the inflow port 33 and the outflow port 34 are formed, and the flow path of a fluid is defined. The main body 32 is formed with a space extending vertically downward from the inflow port 33 and the outflow port 34. Thereby, when the fluid passes through the foreign matter collecting part 30, the foreign matter Fm contained in the fluid settles inside the main body 32 and is collected by the main body 32.

  Further, in the example shown in FIG. 12, an opening lid 34 is formed in the vertical upper part of the main body 32 of the foreign material collecting unit 30. Thereby, for example, the administrator of the pump apparatus 10D can easily collect the foreign matter collected in the main body 32 by opening the opening lid 34 during maintenance work.

  FIG. 13 is a diagram illustrating another example of the foreign matter collecting unit. As illustrated in FIG. 13, the foreign matter collecting unit 30A collects the foreign matter Fm using the floating of the foreign matter Fm with respect to the fluid, similarly to the foreign matter guide unit 20A of the second embodiment. Specifically, the foreign matter collecting section 30A has a main body 32A that defines a fluid flow path, and a space that extends vertically upward from the inlet 33A and the outlet 34A is formed in the main body 32A. Yes. Thereby, when the fluid passes through the foreign matter collecting part 30A, the foreign matter Fm contained in the fluid is floated inside the main body 32A and collected by the main body 32A. In the example shown in FIG. 13, similarly to the example shown in FIG. 12, an opening lid 34 </ b> A is formed in the vertical upper part of the main body 32 </ b> A of the foreign material collecting unit 30. Thereby, for example, the administrator of the pump device 10D can easily collect the foreign matter collected in the main body 32A by opening the opening lid 34A during maintenance work or the like.

  Further, the foreign matter collecting unit 30 may use a inertial force or a centrifugal force in place of or in addition to the use of sedimentation or levitation of the foreign matter with respect to the fluid in the same manner as the foreign matter guide units 20B and 20C. You may gather. Moreover, the foreign material collection part 30 may be provided with the filter which collects a foreign material.

<Sixth Embodiment>
FIG. 14 is a diagram illustrating a schematic configuration of a pump device according to the sixth embodiment. The pump devices according to the sixth and seventh embodiments are different from the pump device according to the first embodiment in that the foreign matter collecting unit 30 is provided. Therefore, the description of the same part as the first embodiment is omitted.

  As shown in FIG. 14, the pump device 10 </ b> E according to the sixth embodiment includes a foreign matter collection unit 30 between the second outlet 23 of the foreign matter guide unit 20 and the jet pump unit 40. Thus, by providing the foreign material collection part 30, it can suppress that a foreign material goes to the jet pump part 40 and the outflow piping 14. FIG.

<Seventh embodiment>
FIG. 15 is a diagram illustrating a schematic configuration of a pump device according to the seventh embodiment. As shown in FIG. 15, the pump device 10 </ b> F of the seventh embodiment includes a foreign matter collecting unit 30 downstream (outflow pipe 14) of the jet pump unit 40. If it carries out like this, the fluid which does not contain a foreign material can be transferred downstream of the pump apparatus 10F.

<Eighth Embodiment>
FIG. 16 is a diagram illustrating a schematic configuration of a pump device according to the eighth embodiment. As shown in FIG. 16, the pump device 10G of the eighth embodiment includes a jet pump unit 40A. In the pump device 10 </ b> G, the outflow pipe 14 that is downstream of the pump 12 and the connection pipe 16 are connected at the connection portion 17. In addition, an outflow branch pipe 14 a is connected to the outflow pipe 14 at a connection portion 17 </ b> A upstream from the connection portion 17. The outflow branch pipe 14 a has one end connected to the outflow pipe 14 and the other end connected to the connection pipe 16. The end of the outflow branch pipe 14a on the side of the connection pipe 16 is an orifice 46A having a small opening degree (flow channel area). In the pump device 10G, the valve 18A is provided between the connection portion 17 and the connection portion 17A in the outflow pipe 14, the valve 18B is provided in the outflow branch pipe 14a, and the connection pipe 16 downstream of the orifice 46A is provided. A valve 18C is provided. The valves 18A to 18C are controlled to open and close when the controller 30 drives an actuator (not shown).

  In the jet pump unit 40A of the eighth embodiment, the valve 18A is opened and the valves 18B and 18C are closed, whereby the connecting pipe 16 is closed and the jet pump unit 40A is stopped. At this time, the fluid discharged from the pump 12 flows as it is to the outflow pipe 14 and goes downstream. In the jet pump unit 40A, the valve 18A is closed and the valves 18B and 18C are opened, so that the connecting pipe 16 is opened and the opening degree of the outflow pipe 14 is reduced. The jet pump unit 40A is in the jet pump state. Become. At this time, the fluid discharged from the pump unit 12 flows into the outflow branch pipe 14a and is discharged from the orifice 46A. The fluid in the connecting pipe 16 is pumped downstream using the jet flow from the orifice 46A as the working fluid. Also in the jet pump unit 40A of the eighth embodiment, the same effect as that of the jet pump unit 40 of the first embodiment can be obtained. In addition, since the foreign substance passes through the valve 18C in the open state (open state), it is desirable to use a valve that does not have a narrow portion around the valve body in the open state.

<Ninth Embodiment>
FIGS. 17 and 18 are schematic diagrams showing the configuration around the jet pump unit of the ninth embodiment. As shown in FIGS. 17 and 18, in the jet pump unit 40 </ b> B of the ninth embodiment, the two connection pipes 16 are symmetrically connected to the inflow pipe 14. In addition, flap valves 42A and 42B are provided at a connection portion 17A between the two connection pipes 16 and the inflow pipe 14.

  Even in such a configuration, by controlling the flap valves 42A and 42B, it is possible to achieve the same effect as the jet pump unit 40 of the first embodiment. That is, as shown in FIG. 17, by rotating the flap valves 42A and 42B to one end side, the outflow pipe 14 can be opened and the connecting pipe 16 can be closed, so that the jet pump unit 40B can be stopped. . Further, as shown in FIG. 18, by rotating the flap valves 42A and 42B to the other end side, the opening degree of the outflow pipe 14 is reduced to form the orifice 46B, and the connection pipe 16 is opened, The pump unit 40B can be in a jet pump state. Further, by connecting the two connecting pipes 16 symmetrically with respect to the inflow pipe 14, the flow of fluid in the jet pump section 40 can be made symmetric, and energy loss can be reduced.

<Tenth Embodiment>
19 and 20 are schematic diagrams showing the configuration around the jet pump unit according to the tenth embodiment. As shown in FIGS. 19 and 20, in the jet pump section 40 </ b> C of the tenth embodiment, the outflow pipe 14 and the connection pipe 16 are connected at the connection section 17. In addition, an outflow branch pipe 14 b is connected to the outflow pipe 14 at a connection portion 17 </ b> A upstream from the connection portion 17. The outflow branch pipe 14 b has one end connected to the outflow pipe 14 and the other end connected to the connection pipe 16. The jet pump unit 40C is provided with a moving body 42C that moves linearly by the actuator 48A. The moving body 42 forms an orifice 46C in the outflow branch pipe 14b.

As shown in FIG. 19, the moving body 42 </ b> C closes the connection pipe 16 and the outflow branch pipe 14 b and stops the jet pump unit 40 </ b> C when moving to one end side. At this time, the fluid discharged from the pump 12 flows as it is to the outflow pipe 14 and goes downstream. Further, as shown in FIG. 20, the moving body 42C closes the outflow pipe 14 and opens the connection pipe 16 and the outflow branch pipe 14b when moving to the other end side, so that the jet pump unit 40C is in a jet pump state. And At this time, the fluid discharged from the pump 12 flows into the outflow branch pipe 14b and is discharged from the orifice 46C of the moving body 42C. The fluid in the connecting pipe 16 is pumped downstream using the jet flow from the orifice 46C as the working fluid. In the jet pump unit 40A of the tenth embodiment, the same effect as that of the jet pump unit 40 of the first embodiment can be obtained.

<Eleventh embodiment>
21 and 22 are schematic diagrams showing the configuration around the jet pump unit of the eleventh embodiment. The jet pump unit 40D of the eleventh embodiment includes a moving body 42D that moves linearly by an actuator 48A instead of the valves 18A to 18C of the jet pump unit 40A of the eighth embodiment. As shown in FIG. 21, the moving body 42D closes the connecting pipe 16 and the outflow branch pipe 14a and stops the jet pump section 40D when moving to one end side. Further, as shown in FIG. 22, the moving body 42D closes the outflow pipe 14 and opens the connection pipe 16 and the outflow branch pipe 14b when moving to the other end side, so that the jet pump unit 40D is in a jet pump state. And Also in the jet pump unit 40A of the eleventh embodiment, the same effect as the jet pump unit 40 of the first embodiment can be obtained.

<Modification>
In the embodiment described above, one foreign matter guide portion 20 to 20C is provided. However, a plurality of foreign matter guide portions 20 to 20C are provided, for example, the inlet 21A of the foreign matter guide portion 20A of the second embodiment is connected to the first discharge port 22 of the foreign matter guide portion 20 of the first embodiment. May be.

  In the above embodiment, the flap valve 42 is rotated by the control unit 50 and the changeover switch 19. However, only one of the control unit 50 and the changeover switch 19 may be provided.

  Although the embodiments of the present invention have been described above, the above-described embodiments of the present invention are for facilitating the understanding of the present invention and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof. In addition, any combination of the embodiment and the modified example is possible within a range where at least a part of the above-described problems can be solved or a range where at least a part of the effect can be achieved, and is described in the claims and the specification. Any combination or omission of each component is possible.

10, 10A to 10C Pump device 12 Pump 13 Inflow pipe 14 Outflow pipe 16 Connection pipe 19 Changeover switch 20, 20A to 20C Foreign matter guide portions 21, 21A to 21C Inlet 22, 22A to 22C First outlet 23, 23A to 23C Second outlet 24, 24A-24C Main body 30, 30A Foreign matter collecting part 32, 32A Main body 34, 34A Opening lid 40, 40A-40D Jet pump part 42, 42A, 42B Flap valve 42C, 42D Moving body 44 Rotating shaft 46 , 46A to 46D Orifice 48, 48A Actuator 50 Control unit 51 Foreign matter detection unit 52 Flap valve control unit 100A to 100X Pump unit

Claims (8)

A pump for transferring fluid;
An inflow pipe connected to the suction port of the pump;
An outflow pipe connected to the discharge port of the pump;
A connecting pipe connected to the inflow pipe and the outflow pipe;
A jet pump section capable of switching between a first state in which the connection pipe is closed and a second state in which the connection pipe is opened and the opening degree of the outflow pipe is reduced;
A pump device comprising: The pump device according to claim 1,
In the second state of the jet pump part, the opening degree of the outflow pipe in the connection part of the connection pipe and the outflow pipe is reduced.
Pump device. The pump device according to claim 2,
The jet pump unit includes a flap valve that is provided at a connection portion between the connection pipe and the outflow pipe and is rotatable with the connection portion as one end. In the first state, the flap valve rotates in a first direction. The flap valve closes the connecting pipe, and in the second state, the flap valve rotates in the second direction, thereby reducing the opening degree of the outflow pipe.
Pump device. The pump device according to any one of claims 1 to 3,
An inflow port connected to the inflow pipe, a first outflow port connected to the suction port of the pump, and a second outflow port connected to the connection pipe, the fluid flowing in from the inflow port A foreign matter guide for guiding foreign matter contained in the second outlet;
A pump device further provided. The pump device according to claim 4,
The foreign matter guide unit guides the foreign matter to the second outlet using a specific gravity difference between the fluid and the foreign matter.
Pump device. The pump device according to claim 4 or 5, wherein
A foreign matter detector provided upstream of the foreign matter guide and detecting whether the fluid contains the foreign matter;
When the foreign matter detection unit detects that the fluid contains the foreign matter, a control unit that sets the jet pump unit to the second state;
A pump device further comprising: The pump device according to claim 6,
A changeover switch capable of switching the state of the jet pump part regardless of the detection by the foreign matter detection part,
A pump device further provided. The pump device according to any one of claims 1 to 7,
The pump, the inflow pipe, the outflow pipe, the connection pipe, and the jet pump unit constitute a set of pump units,
A plurality of sets of the pump units are connected in series, and the outflow piping of the final set of the pump units is provided with a foreign matter collecting portion for collecting foreign matters contained in the fluid.
Pump device.

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