JP4937399B2 - Firewood pump - Google Patents

Description

  The present invention relates to a bag pump.

  As shown in FIG. 6, the conventional dredge pump 60 includes a high-pressure water jet pipe 63 having an ejector nozzle 62 at a tip portion 61 bent in a U-shape, and the ejector nozzle 62 in the vicinity of a suction port 64. And a sand discharge pipe 65 for sucking and delivering surrounding soil water (slurry) by jetting high-pressure water into the suction port 64, and a stirring jet nozzle 66 below the suction port 64. The jet pipe 67 provided in the above was installed horizontally.

  In addition, as shown in FIG. 7, the dredger device 68 has a plurality of dredging pumps 71 suspended in a straight line from a pier 69 installed at a place where sand is accumulated to a sedimentation section 70 on the seabed. A water supply pipe 72 that pumps high-pressure water and a sand discharge pipe 73 that discharges the collected earth and sand water are connected to 71. Another soot pump and soot device is disclosed in, for example, Japanese Patent Application Laid-Open No. 2002-266369.

JP 2002-266369 A

However, the dredging pump 60 as described above has the jet pipe 67 installed horizontally, and the jet nozzle 66 for stirring is installed on the lower side thereof, so that the flow of drift sand into the sand pocket is reduced and stirring is performed. There was a problem that efficient suction could not be done without success.
As a solution to this problem, without deepening the installation position of the dredge pump (when the installation position of the dredge pump is deepened, the water pressure sent to the discharge pipe is increased, which increases the cost of electricity and the efficiency is reduced), and the sand pocket The size of the sand pocket is increased by increasing the size of the sand pocket and increasing the amount of sand that can be collected, and liquefying a wide range of sand (injecting sand by jetting high-pressure water from the jet nozzle of the jet pipe). There are times when it expands.

The present invention has been made in view of the problems as described above, and the purpose of the present invention is to improve the size of sand pockets by liquefying a wide range of sand without deepening the installation position. Is to provide a pump.

The gist of the dredging pump of the present invention is a high-pressure water injection pipe that is provided with an ejector nozzle at the tip bent upward and is fed from a water supply pipe, and the ejector nozzle is located in the vicinity of the suction port. A high-pressure water jet that sucks in the surrounding sediment water and pumps it upward, and is sandwiched between the high-pressure water jet pipe and sandwiched in the left-right direction, and is suspended and connected via a connecting member. A jet pipe, a water supply pipe for branching high-pressure water to the jet pipe, and a lower end of the jet pipe extending to an arbitrary position below the suction port And an annular jet part having a jet nozzle that blows sand toward the suction port of the sand discharge pipe at appropriate intervals in the circumferential direction of the annular part. It is.

The gist of the dredging pump of the present invention is a high-pressure water injection pipe that is provided with an ejector nozzle at the tip bent upward and is fed from a water supply pipe, and the ejector nozzle is located in the vicinity of the suction port. A high-pressure water jet that sucks in the surrounding sediment water and pumps it upward, and is sandwiched between the high-pressure water jet pipe and sandwiched in the left-right direction, and is suspended and connected via a connecting member. A branched water supply pipe, and a jet pipe arranged at the tip of the branched water supply pipe in an L-shape and arranged below the suction port and extending from the tip to directly below the ejector nozzle And a plurality of jet nozzles which are provided in the jet pipe in any direction and liquefy sediment sand.

  By providing the jet nozzle on the annular jet pipe (three-dimensional position), the bottom area of the sand pocket formed by the eaves is increased, and the required amount is increased. When the sand pocket becomes large in this way, even if the sand is drowned with the same energy, a lot of sand can be dredged over a wide area, so that the dredging can be done efficiently. Further, since the jet nozzle is installed toward the suction port, the earth and sand water around the jet pipe can be smoothly sucked into the suction port. Further, by providing the jet nozzle extending in the downward direction with the jet pipes directed in multiple directions, the liquefaction range of the sand pocket can be expanded, so that the sand pocket can be enlarged.

It is sectional drawing of the scissors pump of 1st Embodiment. It is a perspective view of the dredge pump of 1st Embodiment. It is a conceptual diagram of a sand pocket. It is a front view of the dredge pump of 2nd Embodiment. It is a conceptual diagram of a sand pocket. It is a perspective view of the conventional bag pump. It is a conventional dredge apparatus, (1) is sectional drawing, (2) is a top view, (3) And (4) is sectional drawing of a sand pocket.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the dredge pump of the present invention will be described with reference to the drawings. First, the dredge pump will be described, and then the dredge apparatus using the dredge pump will be described. In each embodiment, the same components are described with the same reference numerals, and only different components are different. A description will be given with reference numerals.

1 and 2 show a bag pump 1 according to the first embodiment. The dredge pump 1 includes a high-pressure water injection pipe 4 having an ejector nozzle 3 at a tip 2 bent into a U-shape, and the ejector nozzle 3 is located in a suction port 5. Are constructed of a sand discharge pipe 6 that sucks in the surrounding earth and sand water and an annular jet pipe 7 positioned below the ejector nozzle 3 and the suction port 5.

The high-pressure water injection pipe 4 and the jet pipe 7 are installed opposite to each other with the sand discharge pipe 6 interposed therebetween, and these are connected by two connecting members 8. The high-pressure water injection pipe 4 and the jet pipe 7 are connected to a water supply pipe 9 that is branched in two. The centrifugal pump 10 installed in the water supply pipe 9 supplies high-pressure water. ing.

Further, the sand discharge pipe 6 for pumping the earth and sand water is connected to a lateral movement cage 11, and this cage 11 is connected to the slurry pit 13. The tip 2 of the high-pressure water injection pipe that is bent in a U-shape and faces upward is positioned directly below the sand discharge pipe 6, and the ejector nozzle 3 at the tip is in the suction port 5 in the skirt 14 of the sand discharge pipe 6. Is located. The skirt portion 14 is connected to the diffusion portion 16 via the throat portion 15, and a suction portion 17 formed so as to be wide at the lower side and narrow toward the upper side is detachably installed inside the skirt portion 14.

On the other hand, as shown in FIGS. 1 and 2, the jet pipe 7 positioned below the suction port 5 is formed in a planar circular shape and is provided with an annular jet portion 7a , and one branched water supply pipe 9 is provided. It is connected. In the jet pipe 7, a jet nozzle 18 having an annular center point coincident with the center point of the suction port 5 is installed toward the suction port 5, and the agitated sand is jetted to the suction port 5 side. Yes. The jet nozzle 18 can be provided not in a concentric circle on the inner peripheral surface of the jet pipe 7 but in a vertical direction.

Therefore, when high-pressure water is supplied to the high-pressure water injection pipe 4 from the water supply pipe 9 by the centrifugal pump 10, this is jetted from the ejector nozzle 3 to the suction port 5.
The inside becomes a negative pressure and the surrounding water is sucked from the suction port 5. Meanwhile, the water supply pipe 9 is connected to the jet pipe 7.
When high-pressure water is supplied from the centrifugal pump 10, this is the jet nozzle 18 of the jet pipe 7.
From the suction port 5, it is jetted to the suction port 5 side, squirts sand, etc., and is sucked from the suction port 5. And
The earth and sand water sucked from the suction port 5 is raised to the upper ridge 11 through the sand discharge pipe 6, sent to the slurry pit 13 through this, and delivered from here to a predetermined place by the pressure feed pump 12.

FIG. 3 shows sand pockets 19 and 20 formed by the soot of this soot pump 1.
When a normal dredging pump is installed at a depth of 10 m from the seabed and the angle of repose is 45 °, the capacity of the sand pocket 19 is 1,047 m ³ . However, when the liquefaction range of the accumulated sand is increased by 1 m in diameter with the dredging pump 1 from this state, the capacity of the sand pocket 20 increases to 1,212 m ³ . At this time, since the installation depth of the ejector nozzle 3 is not changed, the efficiency of the soot can be basically increased without changing the supply energy.

In addition, the jet pipe 7 is not limited to a planar circle as described above, and may be an ellipse or a polygon.

FIG. 4 shows a bag pump 21 of the second embodiment. This dredging pump 21 has a jet pipe 7 extending downward at the tip of an L-shaped water supply pipe 9 and provided with jet nozzles 18 oriented in a plurality of directions. The configuration is the same as that of the bag pump 1 of the first embodiment. Since the center axis of the jet pipe 7 and the center point of the ejector nozzle 3 are aligned and provided directly below, the depth of the sand pocket can be easily expanded. Further, since the jet nozzle 18 is installed in various directions such as downward, upward, obliquely upward, and laterally, the sedimentary sand can be liquefied effectively.

FIG. 5 shows a sand pocket 22 formed by the soot of the soot pump 21.
In the case where a normal dredging pump is installed at a depth of 10 m from the seabed and the angle of repose is 45 °, the capacity of the sand pocket 22 is 1,047 m ³ . However, when the liquefaction range of the accumulated sand is increased by 1 m by using the dredge pump 21 from this state, the capacity of the sand pocket 23 increases to 1,394 m ³ . At this time, since the installation depth of the ejector nozzle 3 is not changed, the efficiency of the soot can be basically increased without changing the supply energy.

1, 21, 60, 71
2, 61 tip,
3, 62 Ejector nozzle,
4, 63 High-pressure water injection pipe,
5, 64 suction port,
6, 65, 73
7, 67 Jet pipe,
7a Annular jet part,
8, connecting material,
9, 72 water supply pipes,
10. Centrifugal pump,
11, 樋,
12, pump,
13, slur pit,
14, the skirt,
15, the throat,
16, diffusion part,
17, suction part,
18, 66 Jet nozzle,
19, 20, 22, 23, 74 Sand pocket,
69, pier,
70, sedimentation part,
76, wide part.

Claims (2)

A high-pressure water injection pipe that is provided with an ejector nozzle at the tip bent upward and is supplied with water from a water supply pipe ;
The ejector nozzle is located in the vicinity of the suction port, and a sand discharge pipe that sucks in the surrounding earth and sand water by jetting high-pressure water into the suction port and pumps it upward.
A jet pipe arranged opposite to the high-pressure water jet pipe across the sand pipe in the left-right direction and suspended and connected via a connecting member;
A water supply pipe for branching and supplying high-pressure water to the high-pressure water injection pipe and the jet pipe;
The lower end portion of the jet pipe extends to an arbitrary position below the suction port and is formed in an annular shape, and the suction port of the sand discharge pipe is provided at appropriate intervals in the circumferential direction of the annular portion. An annular jet part having a jet nozzle that blows sand toward the sand,
浚 渫 pump characterized by. A high-pressure water injection pipe that is provided with an ejector nozzle at the tip bent upward and is supplied with water from a water supply pipe ;
The ejector nozzle is located in the vicinity of the suction port, and a sand discharge pipe that sucks in the surrounding earth and sand water by jetting high-pressure water into the suction port and pumps it upward.
A branched water supply pipe that is arranged opposite to the high-pressure water injection pipe across the sand drain pipe in the left-right direction and is suspended and connected via a connecting member;
A jet pipe arranged at the tip of the branched water supply pipe in an L-shape and arranged below the suction port and extending from the tip of the feed pipe directly below the ejector nozzle;
A plurality of jet nozzles which are provided in the jet pipe in an arbitrary direction and liquefy sediment sand;
浚 渫 pump characterized by.

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