JP2013209961A - Pump device including separation prevention structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of flow separation and an eddy current in a connected portion where a column pipe of a pump device and a discharge pipe are orthogonal to each other.SOLUTION: A pull-out type device (100) includes: a column pipe (102); an in-water motor pump (104) disposed in the column pipe (102); a discharge pipe (122) that is perpendicularly connected to the column pipe at the downstream side of flow (124) between the column pipe and the in-water motor pump; and a separation preventing structure (150) that provides a continuous surface where an inner circumferential surface of the discharge pipe is extended at the corner of orthogonally-connected portion of the column pipe to the discharge pipe, and that suppresses the flow from separating from the inner circumferential wall of the discharge pipe.

Description

  The present invention relates to a pump device provided with a peeling prevention structure.

  In recent years, rainwater tends to flow into a water tank of a pump facility rapidly and in large quantities due to improvement of the pavement rate due to urbanization and residential land development in urban areas and the spread of sewer pipes. However, it may be economically difficult to install a water tank having a capacity sufficient to allow a large amount of rainwater to flow in because the land is expensive. As a result, the capacity of the water absorption tank is insufficient, and the water level is likely to cause a drastic change. A pull-out type pump device is widely used as an example of a pump that removes rainwater from the water tank.

  In addition, a pull-out type pump device is provided to quickly drain water even when there is a risk of water discharge due to a large amount of rainfall caused by a natural disaster such as a typhoon, which may cause a water discharge disaster in lowlands. Is used.

  As a publicly known technique of the publication of the pull-out type pump device, for example, there is a technique disclosed in Patent Document 1.

  FIG. 1 is a diagram illustrating a conventional pump device 700 having a configuration in which a pump unit 704 is inserted into a column pipe 702. A sole plate 732 is attached to the lower part of the column pipe 702 attached so as to be immersed in the pumped water reservoir, and the pump unit 704 is fixed on the sole plate 732. This pump unit 704 has a discharge bowl 734 having guide vanes for guiding the pumped liquid discharged from the impeller 726 in the axial direction into the column pipe 702, a suction bell 736 attached to the lower part thereof, and an upper part attached to the upper part. The motor 716 is composed of main components such as a motor 716 and an impeller 726 attached to the shaft of the motor 716. Further, a power cable 710 is attached to the upper part of the motor 716 and passes through the column hatch 712 of the pumping pipe 702, and is pulled out to the outside. A mechanical seal 738 is attached to the lower part of the motor 716. This prevents the pumped liquid from entering the motor chamber.

  Moreover, there is also a technique disclosed in Patent Document 2 as a publication technique related to a pumping device using a submersible motor pump that is suspended in water and performs pumping work.

  In a liquid pumping device in which a submersible motor pump unit is detachably mounted in a fixed outer casing, the lower end of the suspension pipe is fixed to the upper part of the submersible motor pump unit, and the upper end of the suspension pipe is supported by the upper part of the outer casing. In addition, there is disclosed a technique in which a cable leading to a motor and a cable gland are positioned in a suspension pipe.

  Furthermore, there is also a technique disclosed in Patent Document 3 as a publication technique that enables continuous operation without causing the submersible motor pump to be damaged by heating even in the idling state.

  A plurality of radiating fins are projected from the motor frame in parallel with the water flow into the flow path between the outer peripheral wall of the motor frame of the submersible motor pump and the inner peripheral wall of the column pipe. A technique for providing an air valve for forming an air flow path in an idle state in a column hatch is disclosed.

Japanese Utility Model Publication No. 60-32599 JP 58-138293 A Japanese Patent No. 2632466

  By the way, in the column pipe provided with the pump device, the discharge pipe is usually connected orthogonally to the column pipe. FIG. 2 is a view showing the column pipe 602 in which the pump device 600 is installed.

  As shown in FIG. 2, a submersible motor pump is installed in the column pipe. For example, the submersible motor pump is disposed such that the pump portion is on the upstream side and the motor portion is on the downstream side, and the motor portion has a sealed structure and is directly connected to the pump portion. Water is taken into the pump device from the water inlet of the column pipe. The column pipe is connected at right angles to the discharge pipe on the downstream side of the submersible motor pump. As shown in FIG. 2, during operation of the submersible pump, the fluid taken from the opening flows through the flow path between the column pipe and the submersible motor pump. The fluid that has flowed to the downstream side of the submersible motor pump suddenly changes the flow direction from the upward flow to the lateral flow at the orthogonal connection between the column pipe and the discharge pipe. At this time, flow separation may occur at the connecting portion between the column pipe and the discharge pipe, and vortex flow may occur. If this is the case, the fluid transfer efficiency naturally decreases.

  The present invention has been made to solve the above problems, and the problem is to suppress the separation of flow and the generation of vortex flow at the connection portion where the column pipe and the discharge pipe of the pump device are orthogonal to each other. It is to provide a pump device.

  Hereinafter, means for solving the above-mentioned problems will be described. In order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are added in parentheses, but the present invention is not limited to the illustrated embodiment.

  In order to solve the above problems, a pull-out type pump device (100, 200, 300, 400, 500) includes a column pipe (102, 202, 302, 402, 502) and a submersible motor pump disposed in the column pipe. (104, 404, 504) and a discharge pipe (122, 222, 322) connected orthogonally to the column pipe on the downstream side of the flow (124, 424, 524) between the column pipe and the submersible motor pump. 422, 522) and an anti-separation structure that provides a continuous surface in which the inner peripheral surface of the discharge pipe is extended at the corner of the orthogonal connection portion between the column pipe and the discharge pipe, and the flow is the inner peripheral wall of the discharge pipe And an anti-peeling structure that suppresses peeling from the substrate.

  Here, the peeling prevention structure (150) is provided on the inner peripheral wall of the column pipe around the orthogonal connection portion, and the cross section is formed in a semicircular shape or a streamline shape. Flow separation and vortex generation at the corner can be suppressed.

  Further, the peeling prevention structure (250) is provided on the inner peripheral wall of the column pipe at a corner portion closer to the submersible motor pump than the center of the discharge pipe cross section at the orthogonal connection portion, and the cross section is semicircular or streamlined If it is characterized by being formed in a shape, it is possible to suppress the separation of the flow and the generation of the vortex on the side with the higher flow velocity (A part) in the orthogonal corner part.

Furthermore, the column pipe has a column hatch (412) on the side farther from the submersible motor pump than the orthogonal connection point, and the peeling prevention structure (450) is a curved plate adapted to the inner peripheral wall of the column pipe. A curved surface plate (452) having a hole (454) that matches the discharge hole of the discharge pipe, and a semicircular or streamline cross section around or part of the hole in the curved surface plate for fixing. If it has the formed projection part (456) and it is characterized by being fixed to a column hatch, it can prevent interfering with the work of attachment and detachment of a submersible motor pump.

  Furthermore, if the peeling prevention structure (350, 550) is formed in a shape (360, 560) for smoothly discharging the flow, the corner on the side farther from the submersible motor pump than the center of the cross section of the discharge pipe. The separation of the flow of the part (B part) and the generation of vortex can be suppressed.

  Furthermore, the protective pipe further includes a protective pipe (570) attached to the downstream side of the submersible motor pump, for protecting the power cable (510) of the submersible motor pump (504). If the body (550) is fixed to the protection pipe, the power cable can be prevented from being entangled and damaged, and an efficient pump device can be provided.

  According to the present invention having the above-described configuration, since the separation suppressing structure is mounted in the portion where the column pipe and the discharge pipe are orthogonally connected, that is, in the corner column pipe, the fluid flows in the direction of flow rapidly. The flow direction can be changed smoothly without changing the flow, and the separation of the flow and the generation of the vortex are suppressed, and the fluid is efficiently moved.

It is a figure explaining the conventional pump apparatus which has the structure by which the submersible motor pump was inserted in the column pipe. It is a figure which shows the column pipe in which the pump apparatus was installed. It is a figure which shows the pump apparatus which has the peeling prevention body which concerns on 1st Embodiment. It is an enlarged view which shows the surrounding structure of the orthogonal connection part of the pump apparatus which has a peeling prevention body which concerns on 2nd Embodiment. It is an enlarged view which shows the structure of the circumference | surroundings of the orthogonal connection part of the pump apparatus which has a peeling prevention body and deflector which concern on 3rd Embodiment. It is a figure which shows the pump apparatus which has the peeling prevention body which concerns on 4th Embodiment. It is a figure which shows the pump apparatus which has the peeling prevention body which concerns on 5th Embodiment.

  First, a conventional pull-out type pump device will be described. FIG. 2 is a view showing the column pipe 602 in which the pump device 600 is installed. A submersible motor pump 604 is installed in the column pipe 602. The column pipe 602 provided with the pump device 600 is connected to the discharge pipe 622 at right angles to the downstream side of the submersible motor pump 604.

  In this embodiment, as shown in FIG. 2, the submersible motor pump 604 is disposed such that the pump unit 615 is on the upstream side and the motor unit 616 is on the downstream side. The motor unit 616 has a sealed structure and is directly connected to the pump unit 615. The submersible motor pump 604 takes fluid into the pump device 600 from the water inlet 620.

  During the operation of the pump device 600, the fluid taken in from the water inlet 620 flows through the flow path 624 between the column pipe 602 and the submersible motor pump 604. The fluid that flows to the downstream side of the submersible motor pump 604 abruptly changes the flow direction from the upward flow to the lateral flow at the orthogonal connection portion between the column pipe 602 and the discharge pipe 622. At this time, separation of the flow may occur at the connection portion between the inner peripheral wall of the column pipe 602 and the discharge pipe 622, and a vortex flow may be generated.

  In FIG. 2, the flow of the fluid is indicated by a thick arrow. However, in the vicinity of the connection portion of the discharge pipe 622 that is connected orthogonally to the column pipe 602, as shown in FIG. Fluid separation occurs at both the corner (A part) near the submersible motor pump 604 and the corner (B part) far from the submersible motor pump 604 from the cross-sectional center of the discharge pipe 622, and a vortex flow 640 is generated. . As a result, the fluid transfer efficiency decreases. This fluid separation and vortex flow are noticeable when the connection angle between the column pipe 602 and the discharge pipe 622 is small.

  Next, a pull-out type pump device having the peel preventing structure according to this embodiment will be described. FIG. 3 is a diagram illustrating the pump device 100 including the peeling prevention body 150 according to the first embodiment.

  As shown in FIG. 3, the pump device 100 includes a column pipe 102 and a submersible motor pump 104 disposed in the column pipe 102. The submersible motor pump 104 is disposed, for example, so as to be the pump unit 115 on the upstream side of the flow and the motor unit 116 on the downstream side. The motor unit 116 has a sealed structure and is directly connected to the pump unit 115. In addition, the pump device 100 includes a water suction port 120 on the upstream side of the submersible motor pump 104 and takes water into the pump device 100.

  The column pipe 102 is connected to a discharge pipe 122 orthogonally on the downstream side of the submersible motor pump 104. Further, the column pipe 102 has a column hatch 112 on the most downstream side on the extension line from the water inlet 120 passing through the flow path 124 between the column pipe 102 and the submersible motor pump 104.

  As shown in FIG. 3, the pump device 100 includes a peeling prevention body 150 as an example of a peeling prevention structure on the entire circumference of the orthogonal connection portion between the column pipe 102 and the discharge pipe 122. The peeling prevention body 150 is configured by a continuous surface in which the inner peripheral surface of the discharge pipe 122 is extended to the column pipe 102 side so as to hide the corner portion of the orthogonal connection portion.

  When the pump device 100 having such a configuration is operated, the fluid is taken into the pump device 100 from the water inlet 120 by the pump unit 115. The fluid passes through the flow path 124 between the column pipe 102 and the submersible motor pump 104 and is discharged from the discharge pipe 122 with the direction changed by 90 ° on the downstream side of the submersible motor pump 104. Since the separation preventing body 150 is provided, it is possible to suppress the occurrence of fluid separation and eddy current generated on the discharge pipe 122 side of the orthogonal connection portion, and efficient fluid transfer is possible.

  FIG. 4 is an enlarged view showing a configuration around the orthogonal connection portion of the pump device 200 having the peeling prevention body 250 according to the second embodiment. In the pump device 200 according to the second embodiment, the anti-peeling body 250 as an example of the anti-peeling structure body is a submersible motor pump (not configured) from the center of the cross section of the discharge pipe 222 at the orthogonal connection portion between the column pipe 202 and the discharge pipe 222. It is formed only at the corner (A section) on the side close to the illustration), and is not formed at the corner (B section) on the side farther from the submersible motor pump (not shown) than the center of the cross section of the discharge pipe 222. This is different from the pump device 100 (FIG. 3) according to the first embodiment in which the peeling prevention body 150 (FIG. 3) is formed on the entire circumference of the orthogonal connection portion.

  Specifically, the peeling prevention body 250 has an inner peripheral surface of the discharge pipe 222 in a column (A part) closer to the submersible motor pump (not shown) than the center of the cross section of the discharge pipe 222 in the orthogonal connection portion. As shown in FIG. 4, the cross-section has a continuous surface extending toward the pipe 202 and is semicircular or streamlined. In the second embodiment, the fluid smoothly flows along the separation preventing body 250 in the portion A having a high flow velocity among the orthogonal corner portions, and fluid separation and generation of vortices are suppressed.

  FIG. 5 is an enlarged view showing a configuration around the orthogonal connection portion of the pump device 300 having the peeling prevention body 350 and the deflector 360 according to the third embodiment. The pump device 300 according to the third embodiment has a deflector 360 as an example of a peeling prevention structure in addition to the peeling prevention body 350 as an example of a peeling prevention structure, and thus has a deflector according to the second embodiment. This is different from the pump device 200 according to FIG.

  Similar to the peeling prevention body 250 (FIG. 4) of the second embodiment, the peeling prevention body 350 has a corner (A part) closer to the submersible motor pump (not shown) than the center of the cross section of the discharge pipe 322 in the orthogonal connection part. ), The inner peripheral surface of the discharge pipe 322 has a continuous surface extended to the column pipe 302 side. Further, the peeling prevention body 350 is provided at the corner (B portion) on the side farther from the submersible motor pump (not shown) than the center of the cross section of the discharge pipe 322 at the orthogonal connection portion between the column pipe 302 and the discharge pipe 322. It has a deflector 360 formed so that the fluid flowing inside smoothly enters the discharge pipe 322. By having such a configuration, in the third embodiment, the fluid smoothly flows along the anti-peeling body 350 or the deflector 360 in both the A part and the B part, and fluid exfoliation and generation of vortices are suppressed.

  FIG. 6 is a view showing a pump device 400 having a peel preventing body 450 according to the fourth embodiment. In the pump device 400 according to the fourth embodiment, the peeling prevention body 450 as an example of the peeling prevention structure is fixed to the column patch 412, and the peeling prevention body 250 (FIG. 4) is a column hatch (not shown). This is different from the pump device 200 (FIG. 4) according to the second embodiment that is not fixed to.

  As shown in FIG. 6, the pump device 400 includes a column pipe 402 and a submersible motor pump 404 disposed in the column pipe 402. The submersible motor pump 404 is disposed, for example, so as to be a pump unit 415 on the upstream side of the flow and a motor unit 416 on the downstream side. The motor unit 416 has a sealed structure and is directly connected to the pump unit 415. The pump device 400 includes a water inlet 420 on the upstream side of the submersible motor pump 404 and takes water into the pump device 400.

  The column pipe 402 is connected to a discharge pipe 422 orthogonally on the downstream side of the submersible motor pump 404. Further, the column pipe 402 has a column hatch 412 on the most downstream side on the extension line from the water inlet 420 passing through the flow path 424 between the column pipe 402 and the submersible motor pump 404.

  The peeling prevention body 450 is configured by forming a projection 456 having a semicircular or streamlined cross section similar to the peeling prevention body 250 (FIG. 4) of the second embodiment on the curved curved plate 452 for fixation. . The fixing curved plate 452 has a hole 454 having the same size as the discharge pipe 422 at a position corresponding to the discharge pipe 422 when the peeling prevention body 450 is fixed to the column patch 412. The protrusion 456 as an example of the peeling prevention structure is an angle on the side closer to the submersible motor pump 404 than the center of the cross section of the discharge pipe 422 in the orthogonal connection portion, similarly to the peeling prevention body 250 (FIG. 4) of the second embodiment. In the portion (A portion), the inner peripheral surface of the discharge pipe 422 has a continuous surface extended to the column pipe 402 side. The method of attaching the protruding portion 456 to the fixing curved plate 452 may be welding, or the fixing curved plate 452 and the protruding portion 456 may be integrally formed by casting.

  By having such a configuration, when the submersible motor pump 404 is attached to the column pipe 402 or removed from the column pipe 402, the peeling prevention body 450 can be removed in advance, thereby preventing troubles in work. Can do. The protrusions may be formed on the entire circumference of the orthogonal connection part of the discharge pipe, similarly to the peeling prevention body 150 shown in FIG.

FIG. 7 is a view showing a pump device 500 having a peel preventing structure 580 according to the fifth embodiment. The peeling prevention structure 580 as an example of the peeling prevention structure includes a protective pipe 570 that houses the power cable 510 and the like therein. Moreover, the peeling prevention structure 580 has the peeling prevention body 550 as an example of a peeling prevention structure, and the deflector 560 as an example of a peeling prevention structure similarly to 3rd Embodiment shown in FIG. The peeling prevention body 550 and the deflector 560 are fixed to the outer peripheral portion of the protective pipe 570. This may be fixed by welding, or may be integrally formed by casting.

  As shown in FIG. 7, the pump device 500 includes a column pipe 502 and a submersible motor pump 504 disposed in the column pipe 502. The submersible motor pump 504 is disposed, for example, so as to be a pump unit 515 on the upstream side of the flow and a motor unit 516 on the downstream side. The motor unit 516 has a sealed structure and is directly connected to the pump unit 515. Further, the pump device 500 includes a water inlet 520 on the upstream side of the submersible motor pump 504, and takes in water into the pump device 500.

  The column pipe 502 is connected orthogonally to the discharge pipe 522 on the downstream side of the submersible motor pump 504. Further, the column pipe 502 has a column hatch 512 on the most downstream side on the extension line from the water inlet 520 that passes through the flow path 524 between the column pipe 502 and the submersible motor pump 504.

  The peeling prevention body 550 is configured by forming a protrusion 556 having a semicircular or streamline cross section on a curved curved plate 552 for fixation. The fixing curved plate 552 has a hole 554 having the same size as the inner diameter of the discharge pipe 522 at a position corresponding to the discharge pipe 522 when the peeling prevention body 550 is fixed to the protective pipe 570 and installed in the pump device 500. It is worn. The protrusion 556 as an example of the peeling prevention structure has a discharge pipe 522 having a column pipe whose inner peripheral surface is at a corner (A part) closer to the submersible motor pump 504 than the center of the cross section of the discharge pipe 522 in the orthogonal connection portion. It has a continuous surface extended to the 502 side.

  Further, the peeling prevention body 550 flows in the column pipe 502 at a corner portion (B portion) farther from the submersible motor pump 504 than the center of the cross section of the discharge pipe 522 in the orthogonal connection portion between the column pipe 502 and the discharge pipe 522. A deflector 560 is formed so that the fluid smoothly enters the discharge pipe 522. By having such a configuration, in the fifth embodiment, in both the A part and the B part, the fluid flows smoothly along the peeling prevention body 550 or the deflector 560, and fluid peeling and vortex generation are suppressed. By having the protective pipe 570, the power supply cable 510 can be prevented from being entangled and damaged, and an efficient pump device 500 can be provided.

100, 200, 300, 400, 500: pump device, 102, 202, 302, 402, 502: column pipe, 104, 404, 504: submersible motor pump, 112, 412, 512: column hatch, 115, 415, 515 : Pump part, 116, 416, 516: motor part, 120, 420, 520: water inlet, 122, 222, 322, 422, 522: discharge pipe, 124, 424, 524: flow path, 150: peeling prevention body ( Peeling prevention structure), 250: Peeling prevention body (peeling prevention structure), 350: Peeling prevention body (peeling prevention structure), 360: Deflector (peeling prevention structure), 450: Peeling prevention body (peeling prevention structure) ), 452: curved curved plate for fixation, 454: hole, 456: protrusion (peeling prevention structure), 510: power cable, 550: peeling prevention body ( Separation prevention structure), 552: curved curved plate for fixation, 554: hole, 556: protrusion (peeling prevention structure), 560: deflector (peeling prevention structure), 570: protection pipe, 580: peeling prevention structure ( Peeling prevention structure)

Claims (6)

Column pipes (102, 202, 302, 402, 502);
A submersible motor pump (104, 404, 504) disposed in the column pipe;
A discharge pipe (122, 222, 322, 422, 522) connected orthogonally to the column pipe downstream of the flow (124, 424, 524) between the column pipe and the submersible motor pump;
A separation preventing structure for providing a continuous surface in which an inner peripheral surface of the discharge pipe is extended at a corner of an orthogonal connection portion between the column pipe and the discharge pipe, and the flow is separated from the inner peripheral wall of the discharge pipe. An anti-peeling structure that inhibits
A pull-out type pump device (100, 200, 300, 400, 500). The pump device according to claim 1,
The peeling prevention structure (150) is provided on the inner peripheral wall of the column pipe and around the orthogonal connection portion,
The peeling prevention structure is a pump device (100) having a semicircular or streamline cross section. The pump device according to claim 1,
The peeling prevention structure (250) is provided on the inner peripheral wall of the column pipe at a corner nearer the submersible motor pump than the center of the discharge pipe cross section at the orthogonal connection point,
The peeling prevention structure is a pump device (200) having a semicircular or streamline cross section. The pump device according to claim 2 or 3,
The column pipe has a column hatch (412) on the side farther from the submersible motor pump than the orthogonal connection point,
The peeling prevention structure (450)
A curved plate (452) for fixing, which is a curved plate adapted to the inner peripheral wall of the column pipe and has a hole (454) that matches the discharge hole of the discharge pipe;
A protrusion (456) having a semicircular or streamline cross section around or part of the hole of the fixed curved plate;
The peeling prevention structure is a pump device (400) fixed to the column hatch. The pump device according to claim 1,
The said peeling prevention structure (350,550) is a pump apparatus (300,500) formed in the shape (360,560) which discharges a flow smoothly. The pump device according to claim 5,
A protection pipe for storing and protecting the power cable (510) of the submersible motor pump (504), further comprising a protection pipe (570) attached to the downstream side of the submersible motor pump;
The peeling prevention structure (550) is a pump device (500) fixed to the protective pipe.

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