JP2012036868A - Underwater line pump, and water pumping apparatus utilizing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily maintained underwater line pump with simple structure utilizing compressed air, and to provide a water pumping apparatus utilizing the same.SOLUTION: The pump 1 includes a cylindrical rotor 3 held axially freely rotatably in a housing 2 and whose both end openings are communicated to outside, a turbine 32 formed on an outer circumferential side of the rotor, an impeller 33 formed on an inner circumferential side of the rotor, and a nozzle 7 squirting compressed air to a blade 32a of the turbine. One end opening side of the rotor is a sucking opening 31a, and the another end opening side is a discharging opening 31b. The turbine is covered with a casing 6, and two stages of the turbine are arranged in a rotor axis direction. The pumping apparatus A is constituted with a water transferring pipe 8A connected to the pump discharging opening and extending to over a water surface, a water sucking pipe 8B connected to the sucking opening and extending to around a lake bottom, a bowl 9 opening downwards and mounted on a tip of the water sucking pipe, and a filtering unit mounted on the opening rim of the bowl.

Description

  The present invention belongs to the technical field of submersible line pumps that are placed in the water of dams and lakes and perform pumping of water and sediment, and in particular, submersible line pumps that are driven by externally supplied compressed air, and pumping devices using the pumps About.

  Traditionally, line pumps placed in water have been used for pumping up water from dams and lakes and sucking sediment from the lake bottom.

  In recent years, there has been a demand for an underwater line pump that is downsized while maintaining a high head, and that further simplifies the structure and does not require high processing accuracy. Therefore, an “external drive type line pump” of Patent Document 1 and a “line pump” of Patent Document 2 are proposed and disclosed.

  According to these documents, the “external drive type line pump” of Patent Document 1 includes a rotor in which a drive magnet is disposed around and a blade portion for boosting is provided inside, and a rotor for rotating the rotor. A stator that forms a rotating magnetic field; a stator that is attached to the periphery; and a partition that has a fixed shaft holding portion that rotatably supports the rotor. It is the structure arrange | positioned between these.

  In addition, the “line pump” of Patent Document 2 is a cylindrical shape including a housing in which a suction port and a discharge port are arranged in a straight line, and a driven magnetic body rotatably supported by a bearing in the housing. The rotor, a fan fixed in the cylinder of the rotor and integrally formed with blades on the inner wall surface of the cylindrical body, and a drive unit disposed around the housing and provided to face the magnetic body provided in the rotor It is a configuration. Since there are only blades between the suction port and the discharge port, the stator is configured to be low output. In the case of downsizing, since parts other than the blades are not present in the fluid passage, there is a feature that does not require machining accuracy.

JP 2000-274386 (page 3-8, Fig. 1) JP 2009-270512 A (page 3-6, FIG. 1)

  However, all of the submerged line pumps in the above document are configured by an electromagnet and a coil having a drive source arranged on the rotor or stator side. For this reason, when the pump main body is placed in water, in addition to configuring the inside of the pump body to be watertight, it is necessary to also configure the electric wire itself for sending power and electric signals to the devices in the pump to be watertight. . For this reason, the pump of the above-mentioned document increases the number of parts due to the installation of watertight parts (for example, sealing materials, packing materials, etc.) and requires high assembling accuracy, so that not only product costs but also maintenance management costs increase. There was a problem.

  Therefore, the present invention pays attention to the above-mentioned problem, focuses on using compressed air without worrying about leakage without using electric power as a power source, and is easy to maintain and has a relatively simple structure. An underwater line pump and a pumping device using the same are provided.

  The underwater line pump of the present invention (hereinafter referred to as “the present pump”) employs the following configuration in order to solve the above-described problems.

  That is, a cylindrical rotor that is rotatably held in the housing and has both end openings communicated to the outside, a turbine formed on the outer peripheral side of the rotor, an impeller formed on the inner peripheral side of the rotor, A nozzle that is arranged in a housing and injects compressed air from an external supply source to the blades of the turbine, and has a suction opening at one end opening side of the rotor and a water discharge at the other end opening side to an external system. It is characterized by an exit.

  Further, one or two or more nozzles corresponding to the turbine are arranged. More specifically, it is preferable to arrange a plurality of nozzles at the outer peripheral position of the turbine so that the injection angle of each nozzle to the blade can be adjusted.

  Further, the turbine is covered with a casing held in a housing. The casing may cover most of the upper and lower sides and the outer periphery of the turbine, and may have a configuration in which nozzles are arranged at predetermined positions of the casing.

  Furthermore, the constituent unit including the nozzle and the casing corresponding to the turbine may be arranged in multiple stages along the axial direction of the rotor.

  Next, the structure of the pumping device using the pump of the above configuration is connected to the discharge port of the pump and extended to the surface of the water, and connected to the suction port of the pump and extended to the vicinity of the bottom of the lake. A water-absorbing pipe, a downward-opening housing attached to the end opening edge of the water-absorbing pipe so as to be parallel to the axial direction of the pipe, and a filtering means extending in a circular fashion from the opening edge of the housing. It is characterized by that. It is preferable that the casing is in contact with the bottom of the lake through a filtering means by extending the water absorption pipe.

  Further, the casing is characterized in that it can be translated in the axial direction of the water absorption pipe by a manual operation or by a contact force from another place. Furthermore, since the area of the opening shape of the housing defines a region in one suction work process, a larger diameter is preferable than the opening diameter of the water absorption pipe, but the work efficiency at the time of the lateral movement and The optimum opening diameter is determined in consideration of the degree of copying contact with the lake bottom. Moreover, it is good also as exchangeable suitably according to the condition of the lake bottom of work object.

The filtering means is characterized by a fence shape, a mesh shape, a lattice shape, or a turtle shell shape having an opening shape that can prevent passage of gravel, twigs, leaves.
[Action]

  In this pump, compressed air is blown out from the nozzle arranged in the housing toward the blades of the turbine, the entire rotor rotates, and the impeller formed on the inner peripheral side of the rotor removes water and sediment on the bottom of the rotor. And sucking out from the discharge port.

  Further, since a plurality of nozzles corresponding to the turbine are arranged, the number of rotations of the turbine can be appropriately increased or decreased by adjusting the pressure of compressed air from each nozzle. In the case where the turbine is covered with a casing held in the housing, the injection path of the compressed air from the nozzle is limited, and the compressed air can be injected to a predetermined position of the blade. In this case, the rotor can be efficiently rotated without the compressed air diffusing around.

  Furthermore, in the case of a configuration in which the turbine, the nozzle, and the component unit including these casings are arranged in multiple stages along the axial direction of the rotor, the rotation speed and torque of the entire pump can be doubled, and the pump capacity is improved. As a result, the range of application is expanded.

  When the pump is driven in contact with the bottom of a lake, such as a dam, the pumping device used by this pump will have fluidity such as humus, sludge, turbid water, and gravel that stays at the bottom of the lake from the opening edge of the pump. A certain sediment (hereinafter abbreviated as “precipitate etc.”) is sucked and pumped up on the water surface and sent out. In addition, the housing attached to the pumping device according to the present application descends along the axial direction of the water absorption pipe as the sediments are pulled up, and large sediments etc. enter the pump by filtration means. Is blocking.

This pump has the following effects by the above configuration.
First, since the externally supplied compressed air acts on the turbine to rotate the rotor, it is necessary to use a water resistant wire for the electric wire in addition to the water leakage treatment of the housing as compared with the conventional submersible line pump using an electric motor as a drive source. Absent. For this reason, the structure of the entire pump can be simplified, not only the product cost but also the maintenance management cost can be reduced, and the repair at the time of failure can be performed quickly.

  Moreover, since this pump supplies compressed air from the drive source of the external arrangement (mainly on the ground or on the water) into the housing, the interior of the housing under the water surface (appropriate water depth position) is compared to the outside. The air pressure becomes high and water can be prevented from entering the pump. From this point of view, it is not necessary to perform advanced watertight treatment on the pump body, and the structure can be further simplified. And even if it is immersed inside the housing, it can be discharged together with compressed air to the outside of the housing, so that it is possible to reduce the malfunction of the equipment due to rust and deposits due to stagnant water in this pump, improving its maintainability and durability be able to.

  This pump is particularly effective when applied to a pumping device for the purpose of pumping sediment from the lake bottom. In consideration of this, the pumping device of the present application can be used for one suction operation process by attaching a housing to the tip opening of a water absorption pipe that is connected to one or more of the suction ports of this pump. The range can be specified to the range covered by the enclosure and the vicinity thereof, and the sediment in the region can be pumped up reliably and effectively.

  Furthermore, the filter means is arranged at the opening edge of the casing to prevent entry of twigs, pebbles and the like that damage the impeller in the pump. The filtering means is attached by making the total cross-sectional area of the fluid flow path flowing into the opening edge of the housing smaller than the opening diameter of the water absorption pipe, thereby reducing the negative pressure in the housing (in other words, An internal / external pressure difference) can be formed. As a result, it is possible to increase the pulling-up force or the pumping-up force of the precipitates in the housing, which contributes to the improvement of work efficiency.

  In addition, since these suction operations are mainly performed as a batch operation (batch operation) every time the housing is moved, it is necessary for the range of the work suction process (the copying area of the housing) and the suction in that range. Once the work time (required suction time in the housing) is determined, the overall work process time can be predicted with a relatively high value based on the target construction work area, and the work plan can be formulated quickly and reliably. be able to.

It is the schematic which shows the pumping apparatus of this application. It is a longitudinal cross-sectional view of this pump. It is a partially cutaway assembly perspective view of this pump. It is a partially notched top view which shows the rotor of this pump. It is a longitudinal cross-sectional view of the housing of the pumping apparatus of this application.

  Hereinafter, embodiments of the present pump and a pumping device using the pump will be described in detail with reference to the accompanying drawings. 1 shown in FIG. 1 is a main pump, and a plurality of water supply pipes 8 </ b> A and water absorption pipes 8 </ b> B connected to the top and bottom of the pump are disposed in water such as a desired dam, lake, and the like to constitute a pumping device A. In the following description, the water surface side of a dam or the like is defined as the upper side and the lake bottom side is defined as the lower side.

  First, the pumping device A is configured by connecting the water supply pipe 8A to the upper side of the pump 1 and connecting the water absorption pipe 8B to the lower side as described above. A plurality of the water supply pipes 8A connected to the upper side are extended to the work table W arranged on the water surface S by flange connection. On the other hand, a plurality of water-absorbing pipes 8B connected to the lower side are extended to the lake bottom side by flange connection, and a housing 9 that contacts the lake bottom B is disposed on the lower end side thereof. The position of the pump 1 in water is preferably about 30% of the depth from the water surface S.

  In the pumping device A, the water supply pipe 8A and the water absorption pipe 8B are connected to the main pump 1, so that the pump 1 is driven so that the lake water (arrow a in FIG. The mixture such as the precipitate is sucked up and pulled up to the work table W on the water surface S (arrow b in FIG. 1).

  Next, a specific configuration of the pump 1 will be described. First, the pump 1 mainly includes a housing 2, a rotor 3 that is rotatably held inside the housing 2, a suction port 31 a on one end opening side, and a discharge port 31 b on the other end opening side, and a rotor 3 is composed of a driving nozzle 7 (hereinafter referred to as “driving nozzle”) that rotates the rotor 3 by injecting compressed air into the nozzle 3.

  First, the housing 2 has an open bottomed cylindrical shape, and the bus bar on the side peripheral surface is inclined about 3 degrees in a predetermined direction, not in the vertical direction, with respect to the bottom surface portion 21. That is, as a result of inclining the vertical line of the bottom surface portion 21 and the bus bar on the side peripheral surface by about 3 degrees, the bus line on the side peripheral surface of the housing 2 and the rotation axis of the rotor 3 held therein are inclined by about 3 degrees. . Further, the axes of the water supply pipe 8A and the water absorption pipe 8B other than those connected to the immediate upper and lower sides of the pump 1 are also inclined by about 3 degrees. In other words, the housing 2 and the pipes are connected such that the vertical direction and the axis of the rotation axis of the rotor 3 are not on the same straight line but have an inclination of about 3 degrees.

  As shown in FIG. 1, in the arrangement of the pump 1 in water, the rotation axis of the rotor 3 is inclined, so that the opening directions of the suction port 31 a and the discharge port 31 b are also inclined. For this reason, the water supply pipe 8A and the water absorption pipe 8B connected to the immediate upper and lower sides of the pump 1 form one flange with an angle for correcting this inclination. Note that inclining the rotation axis of the rotor 3 by about 3 degrees from the vertical direction is a general measure adopted to prevent the entire pump from rotating in water. Further, it is sufficient that only the rotation axis of the rotor 3 is inclined with respect to the vertical direction, and the housing 2 may be formed in such a manner that the generatrix of the side peripheral surface of the housing 2 and the rotation axis of the rotor 3 are parallel without inclination.

  The bottom surface portion 21 of the housing 2 is formed with an opening through which a lower end portion of a cylindrical body 31 of the rotor 3 described later passes. The lower end portion of the cylindrical body 31 penetrating the bottom surface portion 21 communicates with the water absorption pipe 8B provided with the housing 9.

  The housing 2 is closed on the open side by the upper cover 23. An opening through which an upper end portion of a cylindrical body 31 of the rotor 3 to be described later passes is formed in the central portion of the upper cover 23. The upper end portion of the cylindrical body 31 penetrating the upper cover 23 communicates with the water supply pipe 8A extending to the work table W. An air supply pipe 71 and an exhaust pipe 23 a of the drive nozzle 7 are connected to the upper cover 23.

  In addition, posture control nozzles 22 (hereinafter referred to as “posture nozzles”) are disposed at two positions opposite to each other on the outer peripheral surface of the housing 2. Two of these posture nozzles 22 are installed at each arrangement location, and both are installed in opposite directions with respect to the outer peripheral direction. The posture nozzle 22 is connected to a compressor C that is a supply source of compressed air installed on the work table W, and an air supply pipe 22a that branches in the middle is provided to inject compressed air into water. The posture nozzle 22 is supplementarily arranged to prevent the entire pump from rotating when it cannot be dealt with only by the inclination applied to the rotating shaft of the rotor 3. The posture nozzle 22 is capable of adjusting the injection pressure and the injection direction of the compressed air.

  Inside the housing 2, a rotor 3 is rotatably disposed so as to support the vertical direction of the housing 2. The rotor 3 includes a cylindrical body 31 having an upper end portion and a lower end portion communicating with the water supply pipe 8A and the water absorption pipe 8B, a turbine 32 composed of a plurality of blades 32a disposed at substantially intermediate positions on the outer periphery of the cylindrical body 31, and a cylindrical body. An impeller 33 fixed to the inside of 31.

  The cylindrical body 31 of the rotor 3 is axially supported by a bearing 41 held by the lower plate 4 at the lower end side and is axially supported by a bearing 51 held by the upper plate 5 at the upper end side. As described above, the lower end portion of the cylindrical body 31 penetrates the bottom surface portion 21 of the housing 2 to form the suction port 31a and is connected to the water absorption pipe 8B, and the upper end portion penetrates the upper cover 23 to form the discharge port 31b. And it is connected with the water supply pipe 8A.

  A plurality of blades 32 a are attached to the outer peripheral portion of the cylindrical body 31 of the rotor 3. The blade 32a has a substantially square shape in a top view, and the side that receives the compressed air from the drive nozzle 7 is curved. The plurality of blades 32 a are arranged in the circumferential direction of the cylindrical body 31 while being sandwiched between two disk plates to constitute the turbine 32. The turbine 32 is arranged in two stages in the axial direction of the cylindrical body 31.

  Casings 6 are disposed on the outer periphery of each of the two-stage turbines 32 described above. The casing 6 has a shape that substantially covers the outer periphery and top and bottom of the turbine 32. The arrangement of the casing 6 with respect to the turbine 32 is performed such that the casing 6 divided into two in the horizontal direction is sandwiched with respect to the turbine 32 from the left and right. Further, the positioning is performed by arranging a plurality of strip-like frames 61 extending in the vertical direction on the outer periphery to connect the two casings 6 vertically, and the upper and lower ends of each frame 61 are connected to the lower plate 4 and the upper plate. It is fixed to 5.

  Each of the casings 6 is fixed with drive nozzles 7 to be described later at predetermined four locations, and the compressed air sprayed from the drive nozzles 7 is adjusted so as to hit the curved portion of the blade 32a by the side shape of the casing 6 (arrows in FIG. 4). f). Each casing 6 includes four rectangular cylindrical collection pipes 62 that collect compressed air after rotating the turbine 32. The recovery pipe 62 connects the casings up and down and extends upward to connect the upper end to the upper plate 5. An opening through which compressed air passes is formed in the upper plate 5 and the upper cover 23 of the housing 2, and an exhaust pipe 23 a is connected to the upper cover 23.

  The impeller 33 is configured by disposing two blades at the base of a circular tube so as to protrude inside, and is disposed at two locations above and below the cylindrical body 31. The impeller 33 is set so that water, sediment, etc. are sent upward (arrow u in FIG. 2) when rotated right (arrow r in FIG. 4) when viewed from above, that is, the right rotation side is inclined downward. Yes. Note that the number and shape of impellers 33 can be appropriately changed depending on the use environment and the like.

  An air supply pipe 71 is piped to the drive nozzle 7, and compressed air is injected to the turbine 32 of the rotor 3 to constitute a rotational drive source of the rotor 3. Four drive nozzles 7 are connected for each casing, and a total of eight drive nozzles 7 are connected in the two-stage casing 6. All the air supply pipes 71 are connected to a compressor C installed on the work table W, and are connected to a predetermined drive nozzle 7 via the upper cover 23. Note that the arrangement position and number of the drive nozzles 7 can be appropriately changed in order to adjust the rotation speed of the rotor 3 and the torque of the pump 1. For example, the number of arrangement positions with respect to the casing 6 can be increased or decreased. A plurality of drive nozzles 7 may be connected to the arrangement position.

  Further, as described above, a total of four recovery pipes 62 that collect and exhaust the compressed air injected from the drive nozzle 7 are disposed in the casing 6. The recovery pipe 62 passes through the upper plate 5 and the upper cover 23 and communicates with the exhaust pipe 23 a, and the exhaust pipe 23 a extends to the work table W.

  At the lower end of the water absorption pipe 8 </ b> B connected to the suction port 31 a of the pump 1, a housing 9 that constitutes the pumping device A together with the pump 1 is disposed. The housing 9 has a bottomed cylinder shape with the lower surface opened, and a tubular body 91 is disposed in the center of the inside. The tubular body 91 is externally mounted on the outer peripheral portion of the water absorption pipe 8B so as to form a double tube structure. The whole is attached. The casing 9 is free to translate in the pipe axial direction of the water absorption pipe 8B (hereinafter, defined as “movable up and down”) (arrow m1 in FIG. 5).

  At the opening edge of the housing 9, a cover body 92 that is movable up and down with respect to the outer periphery of the housing via a guide (not shown) is disposed. At the lower end opening edge of the cover 92, a rod body bent in a U-shape is arranged in a circular shape, and a filtering portion 92a that functions as filtering means is provided. The filtration unit 92a has a bent portion of a U-shaped rod body on the lower end side to prevent the lower end of the casing 9 from sticking into the lake bottom B or becoming in a close contact state. , Twigs, leaves, small fish, etc.) and a plurality of U-shaped rods are arranged with gaps through which water can pass. The filtration unit 92a may be appropriately changed to a fence shape, a mesh shape, a lattice shape, or a tortoiseshell shape as long as the passage of the dust and the like can be prevented.

Further, the cover body 92 is provided with a wire 92b for eliminating the state when the cover body 92 is in close contact with the lake bottom B. The wire 92b can move the cover body 92 up and down (arrow m2 in FIG. 5) by an operation from the work table W, and when the cover body 92 reaches top dead center, the housing 9 also moves up and down ( The arrow m1 in FIG.
[Operation of this embodiment]

  The main pump 1 having the above configuration is driven by rotating the rotor 3 and rotating the impeller 33 by injecting compressed air supplied by the compressor C installed on the work table W from the drive nozzle 7 to the turbine 32. In addition, the rotation at the time of the drive of this pump 1 is prevented by the inclination of the rotating shaft of the rotor 3 and the injection of the compressed air from the attitude nozzle 22 disposed on the outer periphery of the housing 2.

  In the present pump 1, the turbine 32 is covered with the casing 6 as described above, and the drive nozzles 7 are arranged at a plurality of positions of the casing 6. With this configuration, it is possible to efficiently rotate the turbine 32 by limiting the injection flow path of the compressed air from the drive nozzle 7, and maintain a high head as a pump. Further, since it is possible to adjust the injection pressure appropriately in each drive nozzle 7, it is easy to control the rotation speed and torque of the rotor 3.

  In addition, since the compressed air is injected into the housing when the pump 1 is driven, the internal pressure rises and as a result, water intrusion into the housing is prevented.

  If the arrangement | positioning condition and capacity | capacitance of this pump 1 are explained in full detail, it is suitable to arrange | position and use for a dam or a lake 30-30m in depth, and the injection pressure of each nozzle is 0.6-0. If set to 8 Mpa, the rotation speed of the rotor 3 has a capacity of 3000 to 4000 rpm.

  The pumping device A is driven by the driving of the pump 1 to carry out the work of lifting the lake water, sediment, etc. from the lake bottom B to the work table W.

  Moreover, the pumping apparatus A arrange | positions the housing 9 in the lower end side of the water absorption pipe 8B, and is contact | abutting to such an extent that the opening part does not contact | adhere to the lake bottom B by the vertical movement of the whole or the cover body 92. And in order to drive in this state, the sediment etc. of the part which the opening part of the housing 9 opposes are mainly attracted | sucked. At the same time, the surrounding lake water is also sucked from the gap between the filtration parts 92b, and the passage of large dust through the filtration part 92b is prevented to prevent the pump 1 from being clogged. Note that the housing 9 and the cover body 92 are lowered by their own weight if the deposits or the like are reduced by the suction.

  When the lifting operation of the sediment or the like at the predetermined position is completed, the pumping device A releases the contact state of the chassis 9 with the lake bottom B, and sequentially moves the entire body to perform the lifting operation.

A pumping device 1 main pump 2 housing 21 bottom surface portion 22 attitude nozzle 22a air supply pipe 23 upper cover 23a exhaust pipe 3 rotor 31 cylindrical body 31a suction port 31b discharge port 32 turbine 32a blade 33 impeller 4 lower plate 41 bearing 5 upper plate 51 bearing 6 Casing 61 Frame 62 Recovery pipe 7 Drive nozzle 71 Air supply pipe 8A Water supply pipe 8B Water absorption pipe 9 Housing 91 Pipe body 92 Cover body 92a Filtration part 92b Wire W Work table C Compressor B Lake bottom S Water surface

That is, a turbine which is formed on the outer peripheral side of the rotor with cover the open ends and a cylindrical rotor which communicates with the outside, with a casing which is held in the housing holds freely pivoted within the housing, the rotor An impeller formed on the inner peripheral side of the turbine, and a nozzle that is arranged at a predetermined position of the casing and injects compressed air from an external supply source to the blades of the turbine. And the other end opening side is a discharge port for feeding water to an external system.

The casing is characterized by covering most of the top and bottom and the outer periphery of the turbine.

Moreover, the said nozzle has arrange | positioned 1 or 2 or more corresponding to a turbine to the casing, It is characterized by the above-mentioned. More specifically, a mode in which a plurality of nozzles are arranged so that the injection angle of each nozzle to the blade is adjustable is preferable.

Furthermore, the above turbine, the nozzle to correspond thereto, and a configuration unit plus the casing may be arranged in multiple stages in the axial direction of the rotor.

Claims (7)

A cylindrical rotor that is rotatably held in the housing and has both end openings communicating with the outside;
A turbine formed on the outer peripheral side of the rotor;
An impeller formed on the inner peripheral side of the rotor;
A nozzle that is arranged in the housing and injects compressed air from an external source to the blades of the turbine,
A submersible line pump characterized in that one end opening side of the rotor is a suction port and the other end opening side is a discharge port to an external system.   The submersible line pump according to claim 1, wherein one or more nozzles corresponding to the turbine are arranged.   The submersible line pump according to claim 1 or 2, wherein the turbine is covered with a casing held in a housing.   4. The submersible line pump according to claim 1, wherein the constituent units of the turbine and the corresponding nozzle are arranged in multiple stages along the axial direction of the rotor. An underwater line pump according to claim 1;
A water supply pipe connected to the discharge port of the submersible line pump and extended to the surface of the water;
A water absorption pipe connected to the suction port of the submersible line pump and extended to near the bottom of the lake;
A downwardly opened casing attached to the tip opening edge of the water-absorbing pipe so as to be movable in parallel with the pipe axis;
Filtration means extending in a circular fashion from the opening edge of the housing;
A pumping device characterized by comprising:   6. The pumping device according to claim 5, wherein the parallel movement of the housing in the pipe axial direction is performed by manual operation or by a contact force from another place.   6. The water pumping device according to claim 5, wherein the filtering means has a fence shape, a mesh shape, a lattice shape, or a turtle shell shape having an opening shape capable of preventing passage of gravel, twigs, and leaves.

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