CN202202348U - Reamer with hydraulic characteristic used for dredger - Google Patents

Abstract

The utility model relates to a reamer with hydraulic characteristics for a dredger. The utility model belongs to the technical field of environmental protection dredging. A reamer with hydraulic characteristics for a dredger, including a cutter arm, a wheel hub and a large ring, is characterized in that: the inner side of the cutter arm (3) has a depression (10), the large ring (6) has an inner ring cavity, and the cutter arm ( 3) The inner depression (10) extends to communicate with the ring cavity of the large ring (6), and plays the role of diversion of mud flowing in the direction of the large ring (6). The utility model has the advantages of simple structure, easy realization, good adaptability to soil quality, no easy leakage of sediment, high construction efficiency and the like.

Description

A reamer with hydraulic characteristics for a dredger

technical field

The utility model belongs to the technical field of environmental protection dredging, in particular to a reamer with hydraulic characteristics for a dredger. the

Background technique

At present, in the dredging industry, the reamer is mainly used for the excavation of underwater soil, and the most common use is the closed reamer equipped with movable teeth. As the tonnage of ocean-going ships is getting larger and the draft is getting deeper and deeper, the depth of excavation required by dredgers is getting deeper and deeper, and the soil quality for excavation is getting harder and harder. In order to meet the needs of hard soil, the shape of the reamer has changed from high to short. The original top was wide, but now the top is narrow, and the knife arm has become much thicker. At the same time, the curve of the arm of the reamer is gradually improved, which is conducive to the entry of mud into the reamer. the

The hub of the reamer is connected to the drive shaft, and the rotation of the drive shaft drives the hub of the reamer to rotate. Driven by the hub, the knife arm rotates around the center line, and the knife teeth fixed on the knife arm cut the underwater soil and destroy the internal structure of the soil. At the same time, the mud is disturbed and mixed with water to form mud. Under the suction of the underwater pump, the mud enters the suction pipe from the suction port. During this process, a large part of the mud fails to enter the suction port, but from the Leakage in the gap of the knife arm, forming a residue. In recent years, due to the deepening of the research on the reamer, the continuous improvement of the curved surface of the reamer arm makes the reamer have a certain ability to entrain the surrounding fluid into the reamer (similar to the axial flow pump), but this This effect is not obvious. the

A certain U.S. patent proposes a solution to prevent leakage. A specific shovel is arranged on the side of the large ring of the reamer to guide the cut silt to the suction port. However, since these blades extend only a limited height, the silt still leaks out between the arms before it enters the suction port.

A patent in the Netherlands also proposes a solution to prevent leakage of cutter suction dredgers. This solution allows the suction port to go as deep as possible inside the reamer to improve the suction effect and reduce leakage. However, this solution does not prevent leakage between the two arms, especially due to the centrifugal force generated during the rotation of the reamer. the

Practice has proved that a considerable part of the sand that has been cut remains at the bottom of the water, forming a residual layer. When a horizontal swing is performed, when the bridge frame is not placed and the trolley is not placed, when the original road is reversed, there is still water. Sediment remains, especially for projects with relatively hard soil. The prior art causes problems such as increased cost and reduced engineering efficiency. the

Contents of the invention

In order to solve the problems in the prior art, the utility model provides a reamer with hydraulic characteristics for a dredger. the

The purpose of the utility model is to provide a reamer with hydraulic characteristics for a dredger, which has the characteristics of simple structure, easy realization, good adaptability to soil quality, difficult leakage of sediment and high construction efficiency. the

The scheme of the present invention is mainly improved on the two parts of the knife arm and the large ring. There is a depression on the inner side of the knife arm, and an arc-shaped groove is arranged on the inner edge of the knife arm. Shaped cavity, the flow area gradually decreases along the water flow direction, and the flow rate is increased, which is equivalent to moving the suction port forward. The invention has a simple structure and is easy to realize, but the effect is obvious. the

In this solution, a concave part is designed on the inner side of the knife arm, and an arc-shaped groove is designed on the inner edge of the knife arm. When the reamer rotates, the cutter teeth installed on the outer edge of the cutter arm cut the soil, and some of the loosened soil is mixed into mud, and some are in the form of blocky sand, which enters the inside of the reamer. The outer edge is closer to the center line, and the mud and sand are driven by the knife arm to flow along the inner edge of the knife arm. When the mud and sand reach the inner edge of the knife arm, a large part will leak out in the gap of the knife arm , but when the present invention reaches the inner edge, because the arc-shaped groove is designed, the mud and sediment will be blocked back to reduce leakage. At the same time, the groove also has a guiding effect in the axial direction, and finally in the Driven by the knife arm, the mud and sediment are transported to the place close to the large ring inside the reamer to reduce leakage. the

The reamer with hydraulic characteristics of the utility model dredger adopts the following technical scheme:

A reamer with hydraulic characteristics for a dredger, including a cutter arm, a wheel hub and a large ring, is characterized in that: the inner side of the cutter arm has a depression, the large ring has an inner ring cavity, and the inner side of the cutter arm is concave and extends to communicate with the large ring ring cavity. The role of diversion to the flow of mud to the direction of the large ring.

The reamer with hydraulic characteristics of the utility model dredger can also adopt the following technical measures:

The hydraulic characteristic reamer for dredging ships is characterized in that: there is an arc-shaped groove at the inner edge of the cutter arm.

The reamer with hydraulic characteristics for the dredger is characterized in that the inner ring cavity structure of the large ring is wide at the upper part of the large ring, and the lower part of the large ring is narrowed to form a trumpet-shaped cavity structure, and the wide ring cavity at the upper part is carried on The end of the arm groove. the

The reamer with hydraulic characteristics for the dredger is characterized in that tooth seats are arranged on the outer edge of the knife arm, and each tooth seat is equipped with a detachable cutter tooth. the

The utility model has advantages and positive effects:

The reamer with hydraulic characteristics used by dredgers adopts the new technical solution of the utility model. Compared with the prior art, the upper part of the large ring of the utility model is wide and gradually shrinks in the shape of a bell mouth, and the lower part of the large ring becomes larger. Narrow and small, when the mud and sand conveyed by the knife arm reach the large ring, because the large ring is an overall arc, the sand is not easy to leak out of the reamer, and the effect of axially pushing the mud and sand by the knife arm, large The suction port near the ring is easier to suck away the mud and sand, which also plays a role in reducing leakage.

The present invention is obviously superior to various previous reamers for reducing leakage. This scheme not only ensures the area of the mud inlet channel, but also effectively reduces the chance of the mud and sand leaking out of the reamer. At the same time, it has a simple structure, is suitable for most soil properties, is easy to implement, and has high work efficiency. the

Description of drawings

Fig. 1 is a schematic diagram of the external overall structure of the utility model reamer;

Fig. 2 is a schematic diagram of the internal overall structure of the reamer;

Fig. 3 is a horizontal cross-sectional structure schematic diagram of the reamer;

Fig. 4 is a schematic diagram of the longitudinal sectional structure of the reamer;

Fig. 5 is a schematic diagram of the structure of the cutter arm of the reamer.

In the figure, 1, reamer, 2, hub, 3, knife arm, 4, outer edge, 5, inner edge, 6, large ring, 7, upper part of large ring, 8, lower part of large ring, 9, groove, 10 , depression. the

Detailed ways

In order to further understand the technical content, characteristics and effects of the present utility model, the following examples are listed hereby, and the detailed description is as follows in conjunction with the accompanying drawings:

Example 1

With reference to accompanying drawing 1 to Fig. 5. the

A reamer with hydraulic characteristics for a dredger, including a knife arm, a hub and a large ring, the inner side of the knife arm 3 has a depression 10, the large ring 6 has an inner ring cavity, and the inner side of the knife arm The depression 10 extends to connect with the large ring 6 ring cavity , play the role of diversion of mud flowing in the direction of the large ring 6. There is an arc-shaped groove 9 at the inner edge 5 of the knife arm 3 . The structure of the inner ring chamber of the large ring 6 is that the upper part 7 of the large ring is wide, and the lower part 8 of the large ring is narrowed to form a trumpet-shaped cavity structure. Tooth holders are arranged at the outer edge of the knife arm 3, and a detachable knife tooth is housed on each tooth holder. the

Concrete implementation process of the present utility model:

The cutter suction dredger uses a reamer 1 with hydraulic characteristics, and the reamer is connected with the drive shaft on the bridge through the hub thread. There is a suction port below it. During construction, the reamer extends into the underwater mud layer and rotates around the central axis to cut and loosen the soil. Then the mud is pumped out through the mud suction port by the mud pump. The reamer 1 includes a large ring 6 with a wide top and a narrow bottom that is bell-shaped, a hub 2, and a plurality of knife arms 3 that extend from the large ring 6 to the hub 2 and are axially symmetrically distributed; the edge of the knife arm 3 on the side away from the central axis Hereinafter referred to as the knife arm outer edge 4 is arranged with some tooth seats by a certain angle, and a detachable knife tooth is housed on each seat. There is a depression 10 on the inner side of the knife arm, and an arc-shaped groove 9 is designed on the edge near the central axis side for short as the inner edge 5 of the knife arm. This reamer big ring 6 is divided into upper and lower two parts, and the reamer big ring top 7 is wide, and is bell mouth shape and shrinks gradually, and the big ring bottom 8 becomes narrow.

When the reamer 1 is working underwater, the teeth on the outer edge 4 of the knife arm will cut the underwater soil, and some of the loosened silt will be mixed with water to form mud, and some will be blocky silt, which will enter the reamer 1 Inside, because the inner edge 5 of the knife arm is closer to the center line than the outer edge 4, the mud and sand are driven by the knife arm 3 and flow along the inner edge of the knife arm depression 10, and the mud and sand reach the inner edge of the knife arm , a large part will leak out in the gap of the knife arm, but in the present invention, when the silt reaches the inner edge, because the arc-shaped groove 9 is designed, the mud and silt will be blocked back. , to reduce leakage. At the same time, the groove 9 also has a guiding effect in the axial direction. Finally, driven by the knife arm 3, the mud and sand are transported to the place close to the large ring 6 inside the reamer, and the mud and sand transported by the knife arm 3 When the mud and silt reach the big ring 6, because the big ring is an overall arc, the silt is not easy to leak out of the reamer 1, plus the effect of the knife arm 3 axially pushing the mud and sand, the suction port near the big ring It is easier to suck up the mud and sand, and finally play a role in reducing leakage. the

Claims (4)

1. a dredge boat comprises tool arm, wheel hub and big ring with the reamer with hydraulic characteristic(s), and it is characterized in that: there is depression (10) tool arm (3) inboard, and ring (6) has interior ring cavity greatly, and the inboard depression of tool arm (3) (10) is extended the big ring of connection (6) ring cavity.

2. use the reamer with hydraulic characteristic(s) according to the described dredge boat of claim 1, it is characterized in that: tool arm (3) inward flange (5) has been located arcuate furrow (9).

3. use reamer according to claim 1 or 2 described dredge boats with hydraulic characteristic(s); It is characterized in that: big ring (6) interior ring cavity structure is roomy for big ring top (7); The cavity body structure that is bell mouth shape is narrowed in big ring bottom (8), encircles the end that the roomy ring cavity in top (7) is undertaken on tool arm groove (9) greatly.

4. use the reamer with hydraulic characteristic(s) according to claim 1 or 2 described dredge boats, it is characterized in that: tool arm (3) outer edge is placed with toothholder, and a dismountable cutter tooth is housed on each toothholder.

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