JP3046549B2 - Suction port structure of sand pump for sediment collection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port structure of a sand pump for collecting sediment deposited on the bottom of a sea, a river, a lake, a dam or the like.

[0002]

2. Description of the Related Art As a facility for collecting this kind of earth and sand, for example, in the sea, a discharge pipe (suction pipe) P is sent from a ship S into the sea through a wire W as shown in FIG. At the end of P, the water depth (for example, G ₁ : 15 m, G ₂ : 3
_{0m, G 3: 45m, G} 4: 51.5m guide sawn on the seabed G in correspondence to), which suck up sediment on board is generally by suction. The suction operation is performed by a pump in the ship S or by a submersible pump A as shown in the figure. The submersible pump A is of a hydraulic type or an electric type.

[0003] In the submersible pump type, the conventional suction port structure comprises a truncated conical tubular trumpet tube 1 fixed to the suction port of a pump A as shown in Fig. 9 (see Figs. 5 and 6). A lattice rod 2 is provided in a large-diameter opening of a trumpet tube 1. The reason why the trumpet tube 1 is used is that the conical shape is a shape that easily sucks in earth and sand, and the lattice rod 2 prevents foreign matters other than earth and sand from being mixed.

As shown in FIGS. 10 and 11, a lattice-shaped cylindrical frame 3 is provided on the outer periphery of the front surface of the wrapper tube 1 and an injection (jet) nozzle 4 is provided around the frame 3. 4 excavates the sediment on the seabed by injecting water to improve the efficiency of sucking up sediment.

[0005]

SUMMARY OF THE INVENTION
The suction force of the pump A alone sucks up the earth and sand. Generally, sediment deposited for many years is very hard, and the suction force alone cannot sufficiently loosen the hardened earth and sand. Can't get enough sediment.

[0006] The suction port structure shown in FIGS. 10 and 11 ejects water from the ejection nozzle 4 to loosen the sediment deposited layer.
Although high soil and sand collection efficiency can be obtained, since the injection nozzle 4 is suspended from the cylindrical frame 3 via the bracket 5, the injection nozzle 4 and the water pipe 6 to the nozzle 4 are weak in strength. Things.

Therefore, when the pump A is pulled and moved on the seabed G, the pump A moves with its own weight applied to the nozzles 4 and the like. It is easily deformed and damaged by friction. If it is deformed, the suction operation is disturbed such that the suction port is displaced from the injection position, and the flow of the jet flow is deteriorated due to the bending of the pipe. The impact and friction increase as the depth of the seabed G increases. For this reason, the suction port structure shown in FIG. 10 is not used in the case of a heavy pump such as an electric submersible pump, and the wrapper tube 1 shown in FIG.
Only those that are used. In other words, the suction port structure shown in FIG. 10 cannot be used for an electric or hydraulic submersible pump that collects sediment from the deep sea floor G, and even if it is used, it cannot be used to smoothly perform sediment collection due to deformation or the like. .

An object of the present invention is to provide a suction port structure with a jet nozzle having a strong strength under the above circumstances.

[0009]

In order to solve the above problems, in the present invention, a drilling injection nozzle is provided on the outer surface of a trumpet pipe having a large diameter side as a suction port and a small diameter side connected to a sand pump. A suction port structure of a sand pump for collecting soil and sand, wherein the spray nozzle and the spray water pipe to the nozzle are provided on the outer surface of the wrapper pipe.
Is welded to the trumpet tube over the entire length to provide a supplementary structure.

As described above, if the injection nozzle and the injection water pipe are provided along the outer surface of the wrapper tube by welding , the nozzle and the pipe project from the outer surface of the wrapper tube by the thickness (outer diameter) of the nozzle and the pipe. However, the bulk of the suction port structure does not increase, and the strength can be much stronger than that of FIG.

In this configuration, an annular pipe may be attached to the outer peripheral surface of the small diameter portion of the wrapper pipe by welding , and the plurality of injection nozzles may be connected to the annular pipe via an injection water pipe to the nozzle. 2). In this way, the annular pipe and the like are attached, so that the bulk does not increase,
Injection efficiency can be increased. Also, when the suction port is large and it is desired to obtain effective injection water also at the center of the injection area, an injection nozzle is provided inside the wrapper pipe separately from the plurality of injection nozzles, and It is preferable that the injection water pipe is guided from the inside of the trumpet pipe to the outer surface and connected to the annular pipe (claim 3), so that the jet is also injected from the inside of the trumpet pipe.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment relates to a suction port structure of a submersible sand pump A shown in FIG. 8, and as shown in FIGS. The trumpet tube 10 is screwed to the suction port via the flange 11. The wrapper tube 10 has a cylindrical base at the side of the flange 11 and an approximately frustoconical tube continuously connected from its end (see FIG. 9). A lattice rod 12 is provided at the large-diameter opening of the wrapper tube 10, that is, at the suction port, to prevent suction of large lumps.

On the outer surface of the wrapper tube 10, spray water pipes 13 and 13 a are additionally provided in six equal parts around the circumference thereof, and one pipe 13 a enters the wrapper tube 10 from the middle to reach the opening. The other pipe 13 is obtained by halving a cylindrical pipe and welding the halved end face thereof to the outer surface of the wrapper pipe 10 (see FIG. 1). The pipe 13 is strong against external force . Contact name pipe 13a leading to internal wrapper tube 10, the diameter and additionally provided state does not protrude from the height of the half pipe 13.

The ends of the pipes 13 and 13a are closed.
An injection nozzle 14 is provided, and the tip of each nozzle 14 substantially coincides with the open end face of the trumpet tube 10. As is well known, the nozzle 14 is composed of a bend tube, a socket, and a plug, and by appropriately selecting them, it is possible to obtain an arbitrary ejection force and an ejection area.

An annular pipe 15 is attached to the base of the wrapper tube 10. This pipe 15 is also semicircular in cross section, and its half-split end face is welded to the trumpet pipe 10 (see FIG. 1), and is a connecting pipe to each of the jet water pipes 13 and the jet water supply pipe 16 from the ship 16a is provided.

The suction port structure of this embodiment has the above-described structure. As in the conventional case, as shown in FIG. 8, the jet water is guided to the sea floor G and jetted from the ship to the annular pipe 15 via the jetted water supply pipe 16. (Squirt water) is sent in, and the sand pump A is driven while the water is spouted from the nozzle 14 through the spray water pipe 13 to loosen the earth and sand on the seabed G, and the loosened earth and sand is carried on the ship via the discharge pipe P. .

At the time of this operation, the weight of the sand pump A and the like is added to the wrapper pipe 10, but since it is reinforced by the addition of the pipe 13, it is less likely to be damaged as compared with the conventional one shown in FIG. Further, the pipe 13 is also attached to the trumpet pipe 10,
Since they do not protrude greatly, they are less likely to be damaged as compared with those shown in FIGS. Further, the fact that the pipe 13 does not protrude greatly is that, even when the trumpet tube 10 (suction port) is buried in the earth and sand and pulled out, it is easier to draw out the pipe 13 than in FIGS. There is little fear.

The positions and numbers of the pipes 13 and 13a and the nozzles 14 are arbitrary based on the water depth and the like, and the positions and numbers of the pipes 13a guided into the wrapper tube 10 are also arbitrary. Further, as the cross-sectional shape of the pipes 13 and 15,
In addition to those described above, those shown in FIGS. 7A to 7D can be considered. In addition, the sand pump A is not limited to the underwater pump, and it is needless to say that the present invention can be applied to a suction pipe guided from a pump on the ship, even if the sand pump A is on a ship.

[0019]

As described above, according to the present invention, the flapper pipe is provided with a spouting water pipe or the like on the outer surface thereof, so that the flapper pipe is reinforced and the strength of the pipe is high, resulting in damage to the pipe. It is difficult. For this reason, even in the deep seabed, the earth and sand can be loosened smoothly by the jet water and collected.

In particular, in the case of a sea sand sampling device, except for the sand for sampling (shells, stones, sedimentary wood, clay) repeatedly flows out of the ship for sorting on board. That is, since they are discarded on the seabed, they are constantly deposited on the seabed surface, and the operation is performed in the sea area. For this reason, in the prior art, the excavation ability is poor (FIG. 9), the penetration into the earth and sand cannot be taken deeply (FIG. 10), and the operation is performed at a shallow position. Sea shells, shards of wood, clay, etc. are also very much mixed in the sorted sand.
On the other hand, according to the present invention, the surface is collected only at the beginning of the operation, but as described above, since there is no problem even if the penetration into the soil is taken deeply, from the beginning, the surface is deeply sunk. As a result, it is always a new excavation,
Very good quality sand is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a left side view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is a right side view of the same.

FIG. 5 is a front view of the same embodiment mounted on a sand pump.

FIG. 6 is an enlarged view of FIG.

FIG. 7 is a cross-sectional view of each example of the injection water pipe.

FIG. 8 is an explanatory diagram of soil collection.

FIG. 9 is a perspective view of a conventional example.

FIG. 10 is a perspective view of a conventional example.

FIG. 11 is a fragmentary front view of the same example.

[Explanation of symbols]

1,10 trumpet 2,12 grating rods 13,13a connected water jet pipes 4, 14 nozzle 15 annular pipe 16 ejecting water supply pipe 16a pipe A sand pump _{G 1, G 2, G 3} , G 4 submarine P discharge pipe S ship W wire

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E21C 47/10 E21C 50/00 E02F 3/88 E02F 3/92

Claims (3)

(57) [Claims] 1. A suction port structure for a sand pump A for earth and sand collection, wherein a drilling injection nozzle 14 is provided on an outer surface of a wrapper pipe 10 having a large diameter side as a suction port and a small diameter side connected to a sand pump, the outer surface of the wrapper tube 10, the water jet pie injection water pipe 13 into the injection nozzle 14 and the nozzle 14
By welding the loop 13 to the wrapper tube 10 over its entire length.
Additionally provided with inlet structure of sediment collected for sand pump, characterized in that the Ri. 2. A additionally provided by welding an annular pipe 15 to the trumpet 10 the small diameter portion an outer peripheral surface, a plurality of the injection nozzles 14 into the annular pipe 15 through the water jet pipe 1 3 to the nozzle 14 connected The suction port structure of the sand pump for collecting earth and sand according to claim 1, wherein 3. A provided inside the injection nozzle 14 separately from the wrapper tube 10 and the plurality of injection nozzles 14, Shirubebiite above the outer surface of the injection water pipe 13a to the nozzles 14 from the interior of the wrapper tube 10 The suction port structure for a sand pump for collecting soil and sand according to claim 2, wherein the suction port is connected to the annular pipe (15).