JP2009197572A - Deep water intake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to take a large amount of deep water by an inexpensive device while keeping a water intake port of a water-pumping pipe at a fixed position of a predetermined depth and eliminating breakage of the water-pumping pipe which may be caused by the action force of the tidal current. <P>SOLUTION: The rigid water-pumping pipe comprises a head part 4, a rigid water-pumping pipe body 3 and an intermediate water-intake part 5. The head part 4 is formed to have the diameter larger than that of the rigid water-pumping pipe body 3. An ejection port for the compressed air opens inside the head part 4, and a strainer 13 is arranged on the lower face opening in a stretching manner. An upper end of the rigid water-pumping pipe body 3 is opened and placed in the intermediate water-intake part 5 at the midway position in the axial direction of the pipe. Guide plates 23 are arranged radially, in plan view, around the peripheral surface of the rigid water-pumping pipe body 3 to be continuous with a cylindrical body part 19. The lower face opening of the intermediate water-intake part 5 is partitioned by the guide plates 23 in the peripheral direction. A flexible water-pumping pipe 2 is continuously connected to an upper end of the midway water-intake part 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a deep water intake device for taking deep water from a deep part of an ocean or a lake.

  Deep water existing in the deep layer of the ocean or the like where the amount of sunlight reaching the water surface is less than 1% has firstly low temperature stability that maintains a substantially constant temperature year-round compared to surface layer water, Phytoplankton cannot be synthesized because sunlight does not reach 2, and as a result, inorganic salts such as nitrogen, phosphorus, and silicic acid are not consumed and precipitated into the deep layers, and rich in inorganic salts. Third, plankton and pathogenic microorganisms In other words, it has very few microorganisms, in other words, it has physical and biological cleanliness. Fourth, it is less affected by air and land water, and its chemical contamination is low. Although it is harmful, it contains a good balance of essential trace elements, such as copper and zinc, that are relevant to human health, and sixth, deep water is aged seawater that has circulated through the Pacific Ocean, P in comparison with surface water In recent years, the aquatic resources field of aquaculture farms, environmental fields such as water purification of dam lakes, lakes, oceans, harbors, etc., and energy such as ocean temperature difference power generation and concentration difference power generation It is used in a wide variety of fields such as environmental fields for the purpose of preventing environmental destruction such as fields, and health fields such as drinking water and lotion.

As an apparatus for taking deep water, the lower end of the air pipe is connected to the middle of the upwelling pipe consisting of the same diameter pipes with both upper and lower ends open, and the air pipe is connected to the air on the water surface. A chamber and a compressor are installed, and a rotary vane is provided at the upper end of the air pipe so that air can be taken into the air pipe. The upwelling flow is generated, and this upwelling flow promotes the generation of the upwelling flow also in the water below the lower end opening of the air pipe, and the upwelling flow draws deep water from the lower opening of the upwelling pipe. An apparatus has been proposed (see, for example, Patent Document 1).
The apparatus described in Patent Document 1 is used in a state where the upwelling pipe is suspended from an upper layer portion below the sea surface to a deep layer portion in a state where the upwelling pipe has a fixed form. Therefore, a lateral force acts on the upwelling pipe due to the tidal current, the upper end of the upwelling pipe tilts in a state of holding a fixed position, and the air pipe can not cope with the positional change of the upwelling pipe and breaks, Or the position of the lower end opening of the upwelling pipe, which is a deep water intake, rises, and there is a problem that it is difficult to take water existing in the deep layer where water intake is scheduled.

At the top of the pumping pipe with the same diameter and open at both upper and lower ends, the end of the advection pipe is connected to the inside of the pumping pipe at an angle of about 90 degrees with the axis of the pumping pipe, and the advection pipe mounting position A water amount stabilizer consisting of a circular plate with a large number of perforations and the same diameter as the inner diameter of the pumping pipe is attached to the inner side of the pumping pipe at a slightly lower position, and one end of the air pipe is opened at the lower inner side of the pumping pipe. The other end is connected to the compressed air generator outside the upper opening of the pumping pipe, and the compressed air fed from the other end of the air pipe discharges the compressed air at the lower inner side of the pumping pipe. An apparatus has been proposed in which the size of bubbles generated during pumping of an air lift pump that pumps water with a specific gravity difference of water is made uniform by a water amount stabilizing device (see, for example, Patent Document 2).
The device described in Patent Document 2 is used for a septic tank, but assuming that the length of the pumping pipe is formed to reach the depth of the ocean, the pumping pipe has an angle of approximately 90 degrees with respect to the water surface. It is necessary to fix and use it above the water surface so as to be suspended underwater. If so, as in the invention of Patent Document 1, there is a high possibility that the lengthwise midway portion of the pumping pipe will be damaged by tidal currents, and a steel pumping pipe having a length of several tens of meters or more is manufactured. Had an economic problem of high costs.

A water intake device consisting of a water intake pump and a drive device such as a water wheel is installed on the sea floor, pressure water or a pressure working medium is sent from the land or the ocean, and the water wheel drive device provided on the water bottom is rotated by this pressure medium, and the water intake pump A water intake device such as deep layer water has been proposed in which the water used for water intake is pumped to the destination with a water intake hose made of a soft tube or a rigid tube (see, for example, Patent Document 3).
In the case of using a soft pipe for the intake hose, the water intake device described in Patent Document 3, for example, is folded and transported during transportation, and on the site it is extended from the transport ship while putting air into the hose. The water intake is made up of a water intake pump and a water wheel drive device on the sea floor, although it has the advantage of being able to extract air from the water and re-injecting the air extracted during maintenance work. The number of parts required for installing the apparatus is large, and man-hours and time are required for assembling the apparatus, resulting in high costs.
JP 2001-123999 A JP-A-8-4700 JP-A-8-4657

  The present invention was devised in view of the above-mentioned problems of the prior art, and when the pumping pipe is suspended from the intake to the deep water intake depth of the ocean, the pumping pipe is also affected by the action of the force received from the tidal current. Without damage, the water intake of the pumping pipe maintains a fixed position at a certain depth, and a large amount of deep water can be taken with a low-cost device.

The invention according to claim 1 of the present application is composed of a rigid pumping pipe in which a head part is integrally provided at a lower end of a rigid pumping pipe main body and an intermediate intake part is provided at an upper end, and a flexible pumping pipe, and the head part Is formed in a cylindrical shape having a diameter larger than the diameter of the rigid pumping pipe main body, and an outlet for compressed air sent from an air pipe connected to a compressed air generator provided outside is connected to the inside of the head portion. The lower surface of the head portion is opened, and a strainer is attached to the opening. The intermediate intake portion is provided with a cylindrical body portion having a diameter larger than the tube diameter of the rigid pumping pipe main body. An upper end of the rigid pumping pipe main body is opened in the cylindrical body portion so that an axial center of the rigid pumping pipe main body is located on the same straight line, and the rigid pumping pipe inside the cylindrical body portion A guide plate is arranged radially from the outer peripheral surface of the main body, and the cylindrical body portion The surface is provided with a plurality of openings for absorbing water divided in the circumferential direction by the guide plate, and the upper end of the cylindrical body portion is provided with a connection portion with the flexible pumping pipe, and the connection portion is provided with the movable portion. The lower end of the flexible pumping pipe is connected in the direction of the pipe axis to form a single pumping path, and compressed air is jetted out from the compressed air jetting port * opened in the head part. Due to the difference, the deep water is sucked and pumped from the lower surface opening of the head portion and the lower surface opening of the midway intake portion.
The invention according to claim 2 is composed of a rigid pumping pipe in which a head part is integrally provided at the lower end of the rigid pumping pipe main body and an intermediate intake part is provided at the upper end, a flexible pumping pipe, and an upper rigid pumping pipe. The head part is formed in a cylindrical shape having a diameter larger than the pipe diameter of the rigid pumping pipe main body, and a jet port of compressed air fed from an air pipe connected in communication with a compressed air generator provided outside is provided for the head part. An opening is arranged inside the head part, a lower surface of the head part is opened, a strainer is attached to the opening, and the midway intake part is provided with a cylindrical body part having a diameter larger than the pipe diameter of the rigid pumping pipe main body. , The axial center of the cylindrical body part and the axial center of the rigid pumping pipe main body are located on the same straight line, and the upper end of the rigid pumping pipe main body is opened in the cylindrical body part, and is disposed inside the cylindrical body part. A guide plate is mounted radially on the outer peripheral surface of the rigid pumping pipe main body. A plurality of water-absorbing openings partitioned in the circumferential direction by the guide plate on the lower surface of the cylindrical body part, and a connection part with the flexible pumping pipe is provided on the upper end of the cylindrical body part, The lower end of the flexible pumping pipe is connected in communication with the connecting portion in the pipe axis direction, and the upper rigid pumping pipe has an axial center of the cylindrical body part and an axial center of the pumping pipe located on the same straight line, and the cylinder An upper end of the pumping pipe is disposed in the body portion, a guide plate is attached radially to the outer peripheral surface of the pumping tube inside the cylindrical body portion, and the guide plate is mounted on the lower surface of the cylindrical body portion. A plurality of water-absorbing openings partitioned in the circumferential direction by the lower end of the pumped-up pipe, the upper end of the flexible pumped-up pipe connected in the axial direction, the rigid pumped-up pipe, the flexible pumped-up pipe, And a compressed air jet that forms a single pumping path with the upper rigid pumping pipe and opens into the head section. Compressed air is ejected from the mouth, and deep water is sucked and pumped from the lower surface opening of the head portion, the lower surface opening of the midway intake portion, and the lower surface opening of the upper rigid pumping tube due to the difference in specific gravity of water inside and outside the pipe. And
The invention described in claim 3 is characterized in that an inner diameter of the head portion and an inner diameter of the midway intake portion are set to be four times larger than an inner diameter of the rigid pumping pipe main body.
The invention described in claim 4 is characterized in that an inner diameter of the flexible pumping pipe is set to ½ of an inner diameter of the midway intake section.

In the present invention, since the rigid pumping pipe and the flexible pumping pipe are connected in communication, when subjected to the action of force by tidal current, the flexible pumping pipe is bent by the action force of tidal current, and the rigid pumping pipe part is underwater. Hold the suspended state without tilting. In other words, by not having a reaction force in the flexible pumping pipe, it is possible to keep the position in the deep part of the deep water intake of the rigid pumping pipe at a constant position and to take water from the deep part of the planned water intake depth In addition, there is an effect of preventing the rigid pumping pipe from being damaged.
Since the present invention is provided with a midway intake section, there is an effect that the intake volume can be increased as a result by sucking deep-layer water and taking it into the channel even in the middle of the pumping path of the pumping pipe.
This invention has the effect that the temperature of the water pumped up from a deep layer part can be raised by attracting | sucking water from the lower surface opening of an upper rigid pumping pipe.

  When rigid pumps and flexible pumps are connected in the longitudinal direction for the purpose of preventing damage to the pumped pipes due to the reaction of the pumped pipe to the action of force due to tidal currents, This was realized by bending the flexible pumping pipe. In addition, the purpose of reducing the cost of the apparatus and increasing the amount of water intake was realized by providing a cylindrical midway intake portion having a diameter larger than the inner diameter of the rigid pumping pipe main body at the upper end of the rigid pumping pipe main body.

  The first embodiment will be described with reference to FIGS. 1 to 4, the deep water intake apparatus has a rigid pumping pipe 1 and a flexible pumping pipe 2 that are lowered toward the deep sea part of the ocean connected in the length direction (tube axis direction). The flexible pumping pipe 2 is formed in a single pipe shape in which the hollow portion communicates. The rigid pumping pipe 1 is made of a material having rust prevention, corrosion resistance, chemical resistance, and high rigidity, for example, stainless steel or hard plastic, and the rigid pumping pipe main body 3 has a head portion 4 at the lower end and an upper end at the upper end. Is provided with an intermediate intake section 5. The rigid pumping pipe main body 3 is formed in a hollow tube having the same diameter with a perfect circular cross section, and has a flange portion projecting outward at an angle of 90 degrees with the axial center line of the rigid pumping pipe main body 3 at the lower end outer periphery. 6 are provided integrally. Bolt mounting holes are formed in the flange portion 6 at regular intervals along the circumferential direction. The reinforcing rib 7 is provided between the lower end outer surface of the rigid pumping pipe body 3 and the flange part 6 for the purpose of stably maintaining the positional relationship between the flange part 6 and the rigid pumping pipe body 3 and increasing the connection strength. ing. A wire rope attachment portion 8 is attached to the reinforcing rib 7.

The head portion 4 is provided with mounting flange portions 10 and 11 projecting outward on the entire outer peripheral edge of the upper and lower opening edge of the hollow cylindrical body portion 9 having a perfect circular cross section and opened at both upper and lower ends. In the first embodiment, the hollow cylindrical body portion 9 is formed so that the height and the outer diameter are substantially the same length, but the present invention is not limited to the height and the outer diameter of the same length. In addition, the inner diameter of the hollow cylindrical body portion 9 of the first embodiment is formed to be four times the inner diameter of the rigid pumping tube main body 3. The ratio of the inner diameter of 3 is not limited to 4: 1. The strainer mounting plate 12 has a strainer 13 stretched in an inner space surrounded by an inner peripheral edge of a ring-shaped plate provided with inner and outer peripheral edges of a concentric circle in a plan view. The outer diameters of the flange portion 6, the flange portions 10 and 11, and the strainer mounting plate 12 are formed to be the same diameter. When the outer peripheral edges of the flange portion 10 and the flange portion 6 are aligned with each other in the vertical direction, bolt mounting holes corresponding to the bolt mounting holes drilled in the flange portion 6 are formed in the flange portion 10. . The flange portion 6 overlaps with the flange portion 10 so as to coincide with the respective bolt mounting holes, and the bolts are inserted into the bolt mounting holes, and nuts 14 and 15 are fastened to the upper and lower ends of the bolts, and the flange portion 6 is inserted. And the flange portion 10 are tightened, and the head portion 4 is attached to the rigid pumped pipe main body 3. Bolt mounting holes are formed in the flange portion 10 and the strainer mounting plate 12 with the same interval in the circumferential direction, and the outer peripheral edges of the flange portion 11 and the strainer mounting plate 12 are vertically aligned and overlapped. Bolts are inserted into the bolt mounting holes, tightened with nuts 16 and 17 at both upper and lower ends of the bolts, and a strainer 13 is stretched on the bottom of the hollow cylindrical body 9.
An air pipe 18 communicating with a compressed air generator (not shown) provided outside penetrates the flange portion 6 in an airtight and watertight manner, and a compressed air jet port is opened inside the head portion 4. .

  The midway intake portion 5 is provided with a flange portion 20 projecting outward at the upper end outer edge of the cylindrical body portion 19 whose cross section is a perfect circle and whose both upper and lower ends are open. In the first embodiment, the ratio of the inner diameter of the cylindrical body portion 19 of the midway intake section 5 to the inner diameter of the rigid pumping pipe main body 3 is set to 4: 1. The ratio of the inner diameter of the main body 3 is not limited to this. Bolt mounting holes are formed in the flange portion 20 so as to be spaced apart from each other by a certain distance in the circumferential direction. A side plate is connected to the flange portion 20 and the cylindrical body portion 19 and a mounting plate 21 is attached. The attachment plate 21 is provided with a wire rope insertion portion 22. The upper end of the rigid pumping pipe main body 3 has a longitudinal direction (axis) from the lower end opening of the cylindrical body part 19 so that the axial center of the rigid pumping pipe main body 3 coincides with the axial center of the cylindrical body part 19. (Direction) It is arranged over the middle position. A guide plate 23 is connected between the outer peripheral edge of the rigid pumping pipe main body 3 disposed inside the cylindrical body part 19 and the inner surface of the cylindrical body part 19, and the rigid pumping pipe main body 3 is connected to the cylindrical body part 19. It is fixedly arranged inside. The guide plate 23 is provided in a plan view radially with the outer peripheral edge of the rigid pump-pipe main body 3 spaced apart in the circumferential direction by a certain distance, and a plurality of lower end openings of the cylindrical body portion 19 are partitioned in the circumferential direction by the guide plate 23.

  The connecting pipe 24 is open at both upper and lower ends, has an inner diameter that is substantially the same as the inner diameter of the midway intake section 5, has irregularities formed alternately on the outer peripheral surface along the pipe axis direction, and is stretched outward at the lower end. A flange portion 25 is provided. The outer diameter of the flange portion 25 and the outer diameter of the flange portion 20 are formed to be the same diameter. Bolt mounting holes are formed in the flange portion 25 at positions corresponding to the bolt mounting holes of the flange portion 20. The upper surface of the flange portion 20 and the lower surface of the flange portion 25 are brought into contact with each other, the respective bolt mounting holes are vertically aligned, the bolts are inserted into the bolt mounting holes, and the nuts 26 and 27 are screwed and tightened to both upper and lower ends of the bolts. The connecting pipe 24 is connected to the midway intake section 5 in communication. Concavities and convexities provided on the outer periphery of the connecting pipe 24 are fitted inside the lower end of the flexible pumping pipe 2, and the flexible pumping pipe 2 is connected to the connecting pipe 24 by an annular fastener 28 on the outer periphery of the flexible pumping pipe 2. Communication connection is impossible. The flexible pumping pipe 2 is formed to have the same inner diameter as the cylindrical body portion 19 of the midway intake portion 5 and is made of a polyvinyl chloride hose, a rubber hose, a cloth rubberized hose, or the like.

Next, the use state of Example 1 is demonstrated with reference to FIG. As shown in FIG. 4, the deep water intake apparatus according to the first embodiment attaches the upper end of the wire rope 30 to a predetermined position on the sea surface 29, and passes the wire rope 30 through the wire rope insertion part 22 in the sea to wire the wire rope 30. A lower end is attached to the wire rope attachment part 8, and it aims at the further positional stability in the sea of a deep water intake device. The head part 4 is suspended in a desired deep layer part, and the upper end discharge port of the flexible pumping pipe 2 is used on the sea surface 29.
The compressor 31 is driven, and the generated compressed air is ejected to the inside of the head portion 4 through the air pipe 18 from the compressed air jet opening opened to the inside of the head portion 4. The air ejected to the inside of the head part 4 becomes bubbles and rises in the rigid pumping pipe 1 and the flexible pumping pipe 2. Due to the rise of the bubbles, the water above the compressed air outlet starts to rise together with the bubbles, and an upwelling flow is generated. The upwelling flow in the upper part of the pipe promotes the upwelling flow in the lower part of the pipe, and the deep water filtered by the strainer 13 from the lower surface opening of the head part 4 rises in the pipe from the head part 4. In addition, the water above the bubbles rises along with the bubbles rising upward from the upper end opening of the rigid pumping pipe main body 3, and the upwelling flow is generated in the flexible pumping pipe 2. The upwelling flow in the flexible pumping pipe 2 takes deep water from the lower surface opening defined by the guide plate 23 of the midway intake section 5, and rises in the flexible pumping pipe 2 through the cylindrical body section 19. . The guide plate 23 is provided in order to increase the amount of sucked water by sucking water from the lower surface opening of the cylindrical body portion 19 into a static flow (laminar flow).

Embodiment 2 will be described with reference to FIG. A head part 4 is provided at the lower end of the rigid pump-pipe main body 3, and a midway intake part 32 is provided at the upper end. The midway intake portion 32 is provided with a flange portion 34 at the upper end of the cylindrical body portion 33, and an attachment plate 35 is provided on the outer surface of the upper end. The attachment plate 35 is provided with a wire rope insertion portion 36. The connecting portion fitted inside the lower end of the flexible pumping pipe 37 is formed in a cylindrical shape having irregularities on the peripheral surface, and the outer diameter is about ½ of the outer diameter of the cylindrical body portion 33. Is set to An annular tightening tool 38 prevents the flexible pumping pipe 37 from falling off the connecting portion. The upper rigid pumping pipe 39 is provided with a pumping pipe 41 and a guide plate 42 inside the cylindrical body part 40, and a mounting plate 45 having a flange part 43 and a wire rope insertion part 44 at the upper end of the cylindrical body part 40. ing. The pumping pipe 41 protrudes from the midway position in the tube axis direction of the cylindrical body part 40 to the lower side of the lower end of the cylindrical body part 40, and the axis of the pumping pipe 41 is arranged to coincide with the axial center of the cylindrical body part 40. The lower end of the pumping pipe 41 is connected by a fastening tool 38 so that the upper end of the flexible pumping pipe 37 does not fall off. Inside the cylindrical body portion 40, a guide plate 42 is continuously connected to the cylindrical body portion 40 radially from the peripheral surface of the pumping pipe 41, and a plurality of lower surface openings of the cylindrical body portion 40 are partitioned by the guide plate 42. Yes. A flange 47 is provided at the lower end of the rigid pumping pipe 46, and the perforations of the flange 43 and the perforations of the flange 47 are overlapped and aligned with each other, and bolts are inserted and tightened with nuts 48 and 49.
By absorbing water also from the lower surface opening of the upper rigid pumping pipe 39, there is an effect that the water temperature of the deep water taken from the midway intake part 5 or the head part 4 can be raised.

  By applying high-pressure water or the like below the head portion without providing a strainer on the lower surface of the head portion, the present invention can also be used as a device for removing earth and sand accumulated on the bottom of the ocean.

It is a partially notched front view which shows the principal part of a deep water intake apparatus. Example 1 It is a center longitudinal cross-sectional view of FIG. Example 1 It is an AA line expanded sectional view of FIG. Example 1 It is explanatory drawing which shows a use condition. Example 1 It is a partially-omission front view which shows the principal part of a deep water intake apparatus. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rigid pumping pipe 2, 37 Flexible pumping pipe 3 Rigid pumping pipe main body 4 Head part 5, 32 Midway intake part 13 Strainer 18 Air piping 19, 33, 40 Cylindrical body part 23, 42 Guide plate 39 Upper rigid pumping pipe 41 , 46 Pumping pipe

Claims (4)

The rigid pumping pipe is composed of a rigid pumping pipe having a head part at the lower end of the rigid pumping pipe main body and an intermediate water intake part at the upper end, and a flexible pumping pipe,
The head portion is formed in a cylindrical shape having a diameter larger than the tube diameter of the rigid pumping pipe main body, and a jet port of compressed air fed from an air pipe connected to a compressed air generator provided outside is connected to the head. An opening is arranged inside the part, the lower surface of the head part is opened, and a strainer is attached to the opening.
The midway intake portion is provided with a cylindrical body portion having a diameter larger than the diameter of the rigid pumping pipe main body, and the axial center of the cylindrical body section and the axial center of the rigid pumping pipe main body are positioned on the same straight line. An upper end of the rigid pumping pipe main body is opened in the cylindrical body part, a guide plate is disposed radially from the outer peripheral surface of the rigid pumping pipe main body inside the cylindrical body part, Provided with a plurality of water absorption openings partitioned in the circumferential direction by the guide plate, and provided with a connection portion with the flexible pumping pipe at the upper end of the cylindrical body portion,
A lower end of the flexible pumping pipe is connected to the connecting portion in the pipe axis direction to form one pumping path;
Compressed air is ejected from a compressed air jet opening opened in the head portion, and deep water is sucked and pumped from the lower surface opening of the head portion and the lower surface opening of the midway intake portion by a difference in specific gravity of water inside and outside the pumping pipe. Deep water intake device characterized by. The rigid pumping pipe consists of a rigid pumping pipe that is integrally formed with a head part at the lower end of the rigid pumping pipe body and an intermediate intake part at the upper end, a flexible pumping pipe, and an upper rigid pumping pipe,
The head portion is formed in a cylindrical shape having a diameter larger than the tube diameter of the rigid pumping pipe main body, and a jet port of compressed air fed from an air pipe connected to a compressed air generator provided outside is connected to the head. An opening is arranged inside the part, the lower surface of the head part is opened, and a strainer is attached to the opening.
The midway intake portion is provided with a cylindrical body portion having a diameter larger than the tube diameter of the rigid pumping pipe main body, the axial center of the cylindrical body portion and the axial center of the rigid pumped water pipe main body are located on the same straight line, and An upper end of the rigid pumping pipe main body is opened in the cylindrical body part, and a guide plate is attached radially to the outer peripheral surface of the rigid pumping pipe main body inside the cylindrical body part, The lower surface is provided with a plurality of water absorption openings partitioned in the circumferential direction by the guide plate, the upper end of the cylindrical body portion is provided with a connection portion with the flexible pumping pipe, and the flexible portion is provided at the connection portion. Connect the lower end of the pumping pipe in the direction of the pipe axis,
The upper rigid pumping pipe has an axial center of the cylindrical body portion and an axial center of the pumping pipe located on the same straight line, and the upper end of the pumping pipe is opened in the cylindrical body portion, and is disposed inside the cylindrical body portion. A guide plate is attached to the outer peripheral surface of the pumping pipe radially in plan view, and a plurality of water absorption openings partitioned in the circumferential direction by the guide plate are provided on the lower surface of the cylindrical body portion, and the lower end of the pumping pipe is The upper end of the flexible pumping pipe is connected in communication in the pipe axis direction,
The rigid pumping pipe, the flexible pumping pipe and the upper rigid pumping pipe form one pumping path, and the compressed air is ejected from a compressed air jet opening opened in the head portion, and water inside and outside the pipe is discharged. A deep water intake apparatus characterized in that deep water is sucked and pumped from the lower surface opening of the head part, the intermediate water intake part lower surface opening, and the upper rigid pumping pipe lower surface opening due to a difference in specific gravity.   3. The deep water intake apparatus according to claim 1, wherein an inner diameter of the head part and an inner diameter of the midway intake part are set to be four times as large as an inner diameter of the rigid pumping pipe main body.   The deep water intake apparatus according to claim 2, wherein an inner diameter of the flexible pumping pipe is set to ½ of an inner diameter of the midway intake section.

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