JP2757295B2 - Hydraulic nozzle for wetland dredging - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic nozzle for dredging a muddy bottom of a wetland, and more particularly, to a hydraulic nozzle for dredging a wetland suitable for harvesting crops collected from the muddy bottom of a wetland such as a lotus root. About.

[0002]

2. Description of the Related Art When harvesting a crop that grows in the muddy bottom of a wetland, such as a lotus root, for example, pressurized water sent from a water pump is sprayed toward the muddy bottom of the wetland with a nozzle. Then, dredging the mud on the surface of the mud bottom and collecting lotus roots floating in the water.

[0003] As a hydraulic nozzle for dredging the mud bottom of such a wetland, for example, the one shown in Japanese Patent Application Laid-Open No. 1-240110 is known. this is. This hydraulic nozzle is a tapered nozzle and is connected to a water pump mounted on a float via a flexible hose.

For example, when performing a lotus root harvesting operation using this hydraulic nozzle, while holding the nozzle by hand, insert the tip of the nozzle into the water with the tip directed toward the mud bottom of the wetland, and drive the water pump. Inject water at high pressure from the nozzle. Then, the mud on the surface of the mud bottom is removed by the pressure of the water, and the lotus root buried therein is exposed on the surface of the mud bottom. As a result, the lotus root comes up in the water, and the worker raises it by hand and collects it.

[0005]

When harvesting a lotus root using this hydraulic nozzle, an operator holds the nozzle with one hand while spraying water vigorously toward the mud bottom to dredge the mud bottom. Grasp the rising lotus root with the other hand and pull it up on a boat. However, since water is jetted from the nozzle at a high pressure, the nozzle receives the reaction force. Therefore, the operator must support the nozzle with one hand while resisting the reaction force of the water pressure, and a considerable effort is required to hold the nozzle. Moreover, the nozzle moves to every corner of the wetland, searching for lotus roots buried in the mud bottom,
Dredging of the mud bottom and sampling of the lotus root must be done simultaneously. For this reason, lotus root harvesting requires considerable labor.

The present invention has been made in view of such conventional problems,
An object of the present invention is to provide a wetland dredging hydraulic nozzle that can reduce the effect of water pressure reaction force when supporting the nozzle and that can perform the planar movement of the nozzle extremely easily, and reduce the harvesting operation as described above. I do.

[0007]

According to the present invention, in order to achieve the above object, a nozzle body 6 for jetting high-pressure water sent from a water pump P is attached to the float 1, and the gravity and buoyancy of the float 1 are reduced. This balances the reaction force due to the water pressure and facilitates holding and planar movement of the nozzle body 6.

[0008] That is, the hydraulic pressure pad for the wetland limping according to the present invention.
The swell is a ring-shaped float 1 that has buoyancy against water.
If, when the float 1 is floating in the water, the discharge port of the water off
Float 1 so that it faces downward along the central axis of funnel 1
And a joint 8 for connecting the nozzle body 6 to a hose 9 of the water pump P.

[0009]

With the hydraulic nozzle for dredging wetland according to the present invention, when water is not jetted from the tip of the nozzle body 6, if the float 1 is floated on the surface of the wetland, the nozzle body 6 can be held on the water surface. it can. On the other hand, when water is jetted from the tip of the nozzle body 6 toward the mud bottom, the float 1 floats up due to the reaction force of the water pressure. When the buoyancy, gravity, and reaction force of the water pressure applied to the float 1 are balanced, the nozzle body 6 Will be retained. Therefore, even when water is being sprayed from the nozzle body 6, the nozzle body 6 can be held at a fixed position simply by holding it lightly by hand.

Further, when the nozzle body 6 is moved in a plane, the float 1 can be moved while sliding along the water surface. This allows the operator to easily harvest crops such as lotus roots while easily dredging the mud bottom of the wetland with one hand without lifting the burden of water pressure reaction force.

[0011]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show a wetland dredging hydraulic nozzle according to a first embodiment of the present invention. A rim portion 4 of a ring-shaped nozzle mounting member 2 is fixed on a ring-shaped float 1 made of a foam or a tube. The nozzle mounting member 2 has a cylindrical hub portion 10 at the center thereof, and the hub portion 10 and the rim portion 4
They are integrally connected by radial spokes 3. The center axis of the hub portion 10 is on the common center axis of the float 1 and the nozzle mounting member 2, and the adjusting screw 5 is screwed in a radial direction of the hub portion 10 in a penetrating state.

The nozzle body 6 is fitted into the hub portion 10. When the float 1 is directed downward with respect to the nozzle mounting member 2, the water discharge port at the tip of the nozzle body 6 is directed downward along the central axis of the float 1. The upper part of the nozzle mounting member 2 of the nozzle body 6 is
It is divided into a holding portion 7 extending straight upward and a duct portion 11 extending laterally at a right angle. The duct portion 11 communicates with a water outlet at the tip of the nozzle body 6, and a joint 8 is provided at an end of the duct portion 11. A flexible hose 9 connected to a water pump P (not shown) via the joint 8 is connected to the duct portion 11.

In the embodiment shown in FIGS. 1 and 2, the tip of the nozzle body 6 is flat and spreads on both sides. The nozzle body 6 is fixed to the hub portion 10 by tightening the adjusting screw 5, and by loosening the adjusting screw 5,
It becomes slidable in the center axis direction and the rotation direction with respect to the hub portion 10. Therefore, the height and angle of the nozzle body 6 can be adjusted with the adjustment screw 5 loosened, and then the nozzle body 6 can be fixed by tightening the adjustment screw 5.

When using the wetland dredging hydraulic nozzle, the mounting position of the nozzle body 6 is appropriately adjusted by the adjusting screw 5 described above in accordance with the depth of the wetland, etc. The connected hose 9 is connected to the joint 8. Then, as shown in FIG. 3, the float 1 is floated on the water surface of the wetland, and the tip of the nozzle body 6 is directed downward in the water a. In this state, the float 1 can be maintained substantially horizontal on the water surface by holding either the holding portion 7 or the duct portion 11 with one hand, and at this time, the tip of the nozzle body 6 is Inside it is held towards the layer of mud b at its bottom. At this time, as shown in FIG.
When the middle part of the hose 9 is held on the water surface by the boat 12 or the like so that the middle of the float 1 does not sink in the water a, the float 1 can be more stably maintained on the water surface.

On the other hand, when water is pressure-fed from the water pump P to the nozzle body 6 through the hose 9 and is jetted downward from the tip thereof, the water is jetted due to the reaction force of the pressure of the jetted water. Float 1 floats up compared to when not. However, the float 1 is stabilized at a height at which the gravity applied to the float 1, the nozzle mounting member 2 and the nozzle body 6, the buoyancy applied to the float 1, and the reaction force of the water pressure are balanced. Therefore, also at this time, the nozzle body 6 can be easily held with one hand.

The water sprayed in the direction of the arrow from the tip of the nozzle body 6 blows off the surface layer of the mud b at the bottom of the water a. Therefore, the crop c such as the lotus root buried in the mud b
Appears in water a from inside and floats in water a. Thus, the operator can collect the crop c with the other hand. Furthermore, when digging the crop c from the mud b while moving the tip of the nozzle body 6, it is possible to move the nozzle body 6 to an arbitrary position in the plane direction only by sliding the float 1 along the water surface. it can.

In the embodiment shown in FIGS. 1 and 2, the tip of the nozzle body 6 is flat and spreads on both sides, so that water is jetted from the tip of the nozzle body 6 in a strip shape.
For this reason, it is advantageous to excavate a long continuous lotus root from the mud b. Further, the nozzle body 6 is adjusted by the adjusting screw 5.
Can be adjusted, so it can be easily applied to wetlands with different water depths. Further, since the hose 9 is connected in the lateral direction of the nozzle body 6, the hose 9 can be used while being substantially straightened by water pressure. That is,
Since it is not necessary to bend the hose 9 against the water pressure, the nozzle body 6 can be easily held.

Next, the embodiment of FIG. 4 will be described.
In this embodiment, a ring-shaped float 1 has radial spokes 3, and a hub portion 1 is provided at the intersection of the spokes 3.
0 is provided. The nozzle body 6 is slidably fitted into the hub portion 10 and the nozzle body 6 is fixed to the hub portion 10 with the adjusting screw 5 as in the above-described embodiment. The tip of the nozzle body 6 is tapered with a straight taper. In addition, the other end of the nozzle body 6 is not provided with the duct portion 11 as described above, and the holding portion 7 extending straight up substantially also serves as the duct portion. That is, a joint 8 is provided at the upper end of the holding portion 7, and the hose 8 of the water pump is connected to the nozzle body 6 by the joint 8.

In this embodiment, since the hose 9 is vertically connected to the upper end of the nozzle body 6, there is an advantage that the flow resistance of the water in the nozzle body 6 is small. However, since the hose 9 must be bent before the joint 8, when the hose 9 tries to be straightened by the internal water pressure, a force is applied in a direction in which the nozzle body 6 falls. Therefore, the stability of the nozzle body 6 is slightly deteriorated.

Next, the embodiment of FIG. 5 will be described.
In this embodiment, the float 1 is not circular but has a square shape with rounded corners. In addition, the nozzle body 6
Is flat, and a duct portion 11 is obliquely attached to the upper end side of the nozzle body 6. further,
The adjusting screw 5 is a lever-shaped bolt and can be rotated by hand without using a tool. The other points are the same as those of the embodiment of FIGS. 1 and 2. In this embodiment, the nozzle body 6
The hose 9 is connected obliquely to the upper end of the
And the stability of the nozzle body 6 is relatively good.

The above-mentioned embodiment shows only a few preferred examples of the present invention, and the present invention is not limited to these examples. For example, although a float 1 is used as the float 1, the float may be a drum.
Further, not only one nozzle body 6 but also two or more nozzle bodies 6 can be attached. In addition, the holding unit 7 may be provided on a part of the float 1 or on the periphery thereof without providing the holding unit 7 on the nozzle body 6.

[0022]

As described above, according to the present invention, the water pressure which is jetted from the tip of the nozzle body 6, the buoyancy of the float 1 and the balance between the gravitational force of the float 1 and the nozzle body 6 balance the water pressure. The operator can easily hold the nozzle body 6 with one hand without receiving a load of force, and can smoothly move the nozzle body 6 in a plane along the water surface. As a result, the worker can easily harvest the lotus root and other crops with the other hand while dredging the muddy bottom of the wetland with one hand without lifting the burden of water pressure. And efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a hydraulic nozzle for wetland dredging according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of a wetland dredging hydraulic nozzle according to the embodiment.

FIG. 3 is a partially longitudinal side view in which the mud bottom of the wetland is dredged using the wetland dredging hydraulic nozzle according to the embodiment, and an operator who harvests crops such as lotus roots is omitted.

FIG. 4 is a perspective view of a hydraulic nozzle for dredging wetlands according to another embodiment of the present invention.

FIG. 5 is a perspective view of a wetland dredging hydraulic nozzle according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Float 6 Nozzle body 9 Hose 8 Joint P Water pump

Claims (1)

(57) [Claims] 1. A towards the mud bottom of Shitsuden water jet, in Shitsuden MinatoFukashiyo pressure nozzles used to eliminate mud bottom surface of the mud, the ring-shaped front with buoyant in water < When the float (1) and the float (1) float on the water,
A nozzle body (6) attached to the float (1) such that a water discharge port is directed downward along the central axis of the float (1), and a water pump for the nozzle body (6). A wet nozzle for deep water in wetlands, comprising: a joint (8) connected to the hose (9) of (P).