1. The utility model provides a dredger sweeps shallow with dismantling drag head truss, its characterized in that comprises curb plate, back girder steel, scraper blade and support, the curb plate divide into main curb plate and vice curb plate, main curb plate, vice curb plate are located the both sides of back girder steel and scraper blade respectively, and back girder steel, main curb plate, scraper blade and vice curb plate constitute confined rectangle structure, the support is located inside the confined rectangle structure.

2. The detachable drag head truss for cleaning shallow of dredger according to claim 1, wherein the shape of the main side plate is the same as that of the drag head body side plate, the shape of the sub side plate is the same as that of the main side plate, and the main side plate or the sub side plate and the drag head body are fixed by stainless steel bolts.

3. The detachable drag head truss for dredging of dredger according to claim 1, wherein the rear steel beam is seamless steel pipe with diameter phi 219mm and wall thickness of 20 mm.

4. The demountable drag head truss for dredger shallow water sweeping of claim 1, wherein the lower end of the scraper is a scraping edge.

5. The detachable drag head truss for dredging of dredger according to claim 1, wherein the scraper is an arc plate, and the bending radian of the scraper is pi/3 radian.

6. The detachable drag head truss for dredging of dredger according to claim 1, wherein the material of the scraper is Q345 steel, and the thickness of the scraper is 20 mm.

7. The detachable drag head truss for shallow sweeping of a dredger according to claim 1, wherein the support is divided into a rib plate and an inclined plate, the rib plate equally divides the inner space of the closed rectangular structure into a plurality of chambers, the two ends of the rib plate are connected with the rear steel beam and the scraper, and the inclined plate is in a cross shape and is welded in each chamber divided by the rib plate.

8. The detachable drag head truss for dredging of dredger according to claim 1, wherein the drag head truss is integrally welded.

9. A dredger shallow-sweeping method is characterized in that the dredger according to any one of claims 1-8 is adopted for shallow-sweeping operation by using detachable drag head trusses which are respectively installed on the left side and the right side, namely the near side and the far side, of a drag head body, and the alarm distance between the near side of the drag head body and a ship body is set to be less than or equal to 2 m;

when the dredger turns, the rudder angle of the dredger is controlled within 15 degrees, and the dredger is adjusted for multiple times at 5-10 degrees each time;

when the dredger turns around, the drag head is lifted to a position 3m away from the bottom of the dredger.

10. The dredger shallow-sweeping method of claim 9, wherein the main side plate or the auxiliary side plate of the drag head truss is connected with the drag head body through a bolt, and the scraping edge at the lower end of the scraper is required to protrude out of the lower edge of the drag head body side plate so as to scrape soil; the width of the near side drag head truss structure is controlled within 1m, and the width of the far side drag head truss structure is controlled within 2 m.

Background

At present, in the construction of a dredging engineering quality layer, although an s-shaped line method is adopted by a trailing suction hopper dredger, the existence of shallow points is reduced as much as possible, the underwater progress control is difficult to be accurate due to the flexible connection of the drag heads during the construction, and the shallow points, shallow ridges and the like are inevitably generated, so shallow sweeping operation is required. When the working condition that the soil quality is loose and the shallow point area is wide is met, the construction coverage area of the double rakes is limited, the more the position is, the more the shallow soil is, the higher the upper shallow difficulty is, the slower the whole construction efficiency is, the more difficulty and trouble are brought to the dredging process, the effective construction progress is influenced, the node construction period is delayed, and the technical problems of huge loss and the like are caused.

Disclosure of Invention

The invention provides a detachable drag head truss for sweeping shallow of a dredger and a shallow sweeping method, aiming at solving the problems in the prior art, so that the transverse operation area of drag head operation is increased, and the shallow sweeping efficiency is improved; through dismantling and lightweight design, under the condition of guaranteeing its rigidity, rational utilization drag head dead weight improves the effort to the ground, strengthens sweeping shallow effect, and it has the portability simultaneously, easily assembles in boats and ships, and occupation space is little.

The invention is realized in such a way that the detachable drag head truss for shallow sweeping of the dredger comprises side plates, a rear steel beam, a scraper and a support, wherein the side plates are divided into a main side plate and an auxiliary side plate, the main side plate and the auxiliary side plate are respectively positioned at two sides of the rear steel beam and the scraper, the rear steel beam, the main side plate, the scraper and the auxiliary side plate form a closed rectangular structure, and the support is positioned in the closed rectangular structure.

In the above technical solution, preferably, the shape of the main side plate is the same as that of the drag head body side plate, the shape of the auxiliary side plate is the same as that of the main side plate, and the main side plate or the auxiliary side plate is fixedly connected with the drag head body through a stainless steel bolt, so as to ensure the connection strength.

In the technical scheme, preferably, the rear steel beam is a phi 219mm seamless steel pipe, and the wall thickness of the pipe is 20 mm.

In above-mentioned technical scheme, preferred, the scraper blade lower extreme is for scraping the sword, and when the drag head truss was installed, it need bulge in drag head body curb plate lower limb to scrape the effect of earth.

In the above technical solution, preferably, the scraper is an arc-shaped plate, and the bending radian of the scraper is pi/3 radian.

In the above technical solution, preferably, the material of the scraper is Q345 steel, and the thickness of the scraper is 20 mm.

In the above technical scheme, preferably, the support is divided into a rib plate and an inclined plate, the rib plate equally divides the inner space of the closed rectangular structure into a plurality of chambers, and two ends of the rib plate are connected with the rear steel beam and the scraper plate to play a supporting role. The inclined plates are in a cross form and welded in each cavity divided by the rib plates to play a role in supporting and reinforcing.

In the above technical solution, preferably, the drag head truss is integrally welded.

When the detachable drag head truss is adopted to carry out shallow sweeping operation of the dredger, the drag head truss is respectively arranged at the left side and the right side of the drag head body, namely the near side and the far side, and the alarm distance between the near side of the drag head body and the dredger body is set to be less than or equal to 2m (the lengthened structure is prevented from touching the dredger body when a side slope or a furrow is constructed);

when the dredger steers, instantaneous large-angle steering is avoided, the rudder angle of the dredger is controlled within 15 degrees and is adjusted for multiple times at 5-10 degrees each time, and damage caused by concentrated stress after the protruding part is instantaneously steered is avoided;

when the dredger turns around, the drag head is lifted to a position 3m away from the bottom of the dredger, and turning around with the drag is strictly forbidden.

Preferably, the main side plate or the auxiliary side plate of the drag head truss is connected with the drag head body through a bolt, and the scraping edge at the lower end of the scraping plate needs to protrude out of the lower edge of the drag head body side plate so as to scrape soil; the width of the near side drag head truss structure is controlled within 1m, and the width of the far side drag head truss structure is controlled within 2 m.

The invention has the advantages and positive effects that:

because the invention adopts a brand new technical scheme, compared with the prior art, the drag head truss has light dead weight, large transverse width and rigidity, meets the use requirement, increases the transverse operation area of drag head operation on the basis of not damaging the original drag head body structure, and improves the shallow sweeping efficiency of the drag suction boat; through the detachable and lightweight design, the double-harrow type soil sweeping device is arranged on the harrow head body in the shallow sweeping stage of the dredging engineering, the self weight of the harrow head is reasonably utilized to ensure the pressure on the ground and the sufficient cutting force, the shallow sweeping effect is enhanced, the effective operation width of the double-harrow type soil sweeping device is ensured by simultaneously mounting the double-harrow type soil sweeping device, the stress balance can be better facilitated, and the shallow sweeping quality is improved; during non-shallow construction, the detachable ship is detached, is simple and convenient to operate, is easy to place in an idle position of a ship, and has portability and small overall occupied space. The invention is applied to construction and production, can bring huge economic benefits and has good popularization value.

Drawings

Fig. 1 is a first perspective view of a detachable drag head truss for shallow sweeping of a dredger according to an embodiment of the present invention;

fig. 2 is a second perspective view of a detachable drag head truss for shallow sweeping of a dredger according to an embodiment of the present invention;

fig. 3 is a top view of a removable drag head truss for use in shallow water sweeping of a dredge vessel according to an embodiment of the present invention;

fig. 4 is a side view of a removable drag head truss for use in a dredge boat for shallow sweeping provided by an embodiment of the present invention;

fig. 5 is a schematic view of the installation of a detachable drag head truss for the shallow sweeping of a dredger according to an embodiment of the present invention.

In the figure: 1. a rear steel beam; 2. a squeegee; 3. a secondary side plate; 4. a main side plate; 5. a sloping plate; 6. a rib plate.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:

referring to fig. 1 to 5, an embodiment of the present invention provides a detachable drag head truss for shallow cleaning of a dredger, the drag head truss is integrally welded, and is formed by combining a rear steel beam 1, a scraper 2, a secondary side plate 3, a main side plate 4, an inclined plate 5, and a rib plate 6, the main side plate 4 and the secondary side plate 3 are respectively located at two sides of the rear steel beam 1 and the scraper 2, and the rear steel beam 1, the main side plate 4, the scraper 2, and the secondary side plate 3 form a closed rectangular structure. The inside of the closed rectangular structure is divided into a plurality of chambers by rib plates 6, the two ends of the rib plates 6 are connected with the rear steel beam 1 and the scraper 2 to play a supporting role, in the embodiment, 3 rib plates 6 are adopted to equally divide the inside space of the closed rectangular structure into 4 chambers, and inclined plates 5 in a cross form are welded in each chamber to play roles of reducing weight, supporting and strengthening and improving rigidity.

As a preferred embodiment, the shape of the main side plate 4 is the same as that of the drag head body side plate, the shape of the auxiliary side plate 3 is the same as that of the main side plate 4, so that the drag head truss is conveniently connected with the drag head body, when in use, the main side plate 4 or the auxiliary side plate 3 is fixedly connected with the drag head body by stainless steel bolts so as to ensure the connection strength, increase the operation width of the drag head, and the two sides of the drag head body are arranged simultaneously, so that the stress balance can be facilitated, and the shallow sweeping quality can be improved.

As a preferred embodiment, the rear steel beam 1 is a seamless steel pipe with the diameter of phi 219mm, the wall thickness of the pipe is 20mm, and the self weight of the drag head truss can be reduced to a certain extent.

As a preferred embodiment, the lower end of the scraper 2 is a scraping edge, and when the drag head truss is installed, the scraping edge needs to protrude out of the lower edge of the drag head body side plate to play a role in scraping soil. The material of scraper blade 2 is Q345 steel, guarantees intensity, and scraper blade 2 thickness is 20 mm. The scraper 2 is an arc-shaped plate, and the bending radian of the scraper 2 is pi/3 radian.

According to the detachable drag head truss, through optimizing the structural form, the detachable drag head truss is light in self weight, high in strength, large in transverse width and large in width shallow sweeping operation area. And has the advantages of simple structure, convenient assembly, reduced construction period, wide application range and the like. In the shallow sweeping stage of the dredging engineering, the cutting blade is arranged on two sides of the drag head body, and the self weight of the drag head body ensures enough cutting force.

In order to reduce the dead weight of the drag head truss, the truss structure is adopted, and the function of large-area shallow sweeping is achieved on the basis that the original drag head body structure is not damaged; the invention is specially designed for large-area shallow sweeping construction of the dredger on a quality layer, and improves the shallow sweeping effect and efficiency by increasing the shallow sweeping coverage area of the drag head.

The specific implementation process of the invention comprises the following steps:

the drag head truss is respectively arranged at the left side and the right side of the drag head body, namely the near side and the far side, a main side plate or an auxiliary side plate of the drag head truss is connected with the drag head body by bolts, and a scraping edge at the lower end of the scraping plate needs to protrude out of the lower edge of the drag head body side plate so as to scrape soil; increase the harrow head operation width, harrow head body both sides set up simultaneously, can be more favorable to the atress balance, improve and sweep shallow quality. During non-shallow-sweeping construction, the detachable ship is detached and placed in an idle position of a ship, and the whole occupied space is small.

When the dredger is used for shallow sweeping construction operation, the alarm distance between the near side of the drag head body and the ship body is set to be less than or equal to 2m (the lengthened structure is prevented from touching the ship body during construction of a side slope or a furrow), the width of the near side drag head truss structure is controlled within 1m, and the width of the far side drag head truss structure is controlled within 2 m.

When the dredger steers, instantaneous large-angle steering is avoided, the rudder angle of the dredger is controlled within 15 degrees and is adjusted for multiple times at 5-10 degrees each time, and damage caused by concentrated stress after the protruding part is instantaneously steered is avoided; when the dredger turns around, the drag head is lifted to a position which is about 3m away from the bottom of the dredger, and turning around with the drag is strictly forbidden.

In conclusion, the detachable drag head truss for sweeping the shallow depth of the dredger provided by the invention has the advantages that the drag head shallow depth sweeping operation area is enlarged, and the shallow depth sweeping efficiency of the trailing suction dredger is improved; through configuration optimization, the rigidity of the drag head truss is improved, the weight is reduced, the drag head truss is convenient to disassemble and store, the stress is average during use, the effect is good, the construction period is shortened, and the cost is saved.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.