CN209891265U

CN209891265U - Drag suction dredger drag head capable of ensuring mud passing performance

Info

Publication number: CN209891265U
Application number: CN201920491489.5U
Authority: CN
Inventors: 刘昊; 牛丽泽; 陈景利; 周锋
Original assignee: CCCC TDC Binhai Environmental Channel Dredging Co Ltd
Current assignee: CCCC Tianjin Dredging Engineering Co Ltd
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2020-01-03
Anticipated expiration: 2029-04-12

Abstract

The utility model relates to a trailing suction hopper dredger harrow head of assurance mud trafficability characteristic. The device comprises an outer shell and an inner shell nested in the outer shell, wherein the outer shell and the inner shell are hinged and connected by two rotating shafts respectively positioned at two sides; the bottom of the outer shell is provided with a water guide box, the top of the outer shell is provided with a water inlet pipe, the lower end of the water inlet pipe extends into the outer shell, the end part of the water inlet pipe is communicated with the water guide box, and the bottom of the water guide box is provided with a plurality of water spray holes; the inner shell comprises an inner shell, a front frame and a cover plate, wherein the left side and the right side of the front part of the inner shell are fixedly welded with side plates, a cross beam is arranged between the two side plates, two inner side bases are arranged on the cross beam, the bottom of the cross beam is provided with the front frame, and the cover plate is provided with two outer side bases; the lifting device also comprises two lifting arms with connecting holes; the bottom of the cross beam is provided with a plurality of mounting seats with threaded holes along the length direction, and rake teeth are mounted on the mounting seats through fastening screws. The utility model has the advantages of simple and compact structural design, convenient to use guarantee the trafficability characteristic of mud.

Description

Drag suction dredger drag head capable of ensuring mud passing performance

Technical Field

The utility model belongs to the technical field of the construction equipment of dredging, especially, relate to a trailing suction hopper dredger harrow head of guaranteeing mud trafficability characteristic.

Background

The trailing suction dredger is one of suction type and pumping type, and it sucks mud through the drag heads arranged on the two sides or tail of the ship body, and operates in the way of sucking mud and sailing. The soil is loosened by using the mud rake, a bottom mud cabin is arranged in the ship, and the volume of the cabin represents the size of the ship. The drag suction dredger is a large self-propelled and bin-loading dredger equipped with a drag head excavator tool and a hydraulic mud suction device. When the dredger is used for dredging, the rake suction pipe is put down to the river bottom, mud is absorbed from the river bottom through the rake head and the mud suction pipe by utilizing the vacuum action of the mud pump and enters a mud bin of the dredger, after the mud bin is full, the rake is lifted to sail to a mud throwing area, a mud door is opened, mud is discharged, or the dug mud is directly discharged out of the dredger. Some dredger can also automatically suck out the soil unloaded from the mud bin for hydraulic filling. The self-propelled. The method is suitable for excavation and maintenance of a long and narrow coastal harbor channel without shielding, and the efficiency is highest when sludge is excavated.

The drag suction dredger is generally provided with a drag head, in the process of ship navigation, the drag head dragged at the bottom sucks mud on a flight line and conveys the mud into a mud cabin for storage through a pipeline, a mud barge stops on the drag suction dredger regularly, and the mud stored in the mud cabin is loaded and conveyed to the shore for dredger fill construction. Because the underwater condition is usually complex, if impurities such as stones exist, the stones can enter the drag head and the pipeline in the drag head drag suction process, and the conditions of blocking a port, a pipe, a pump and the like can be generated in serious conditions, so that the drag suction construction process is influenced. After the drag head is blocked, the passing property of slurry is difficult to ensure, so that the time efficiency of equipment is reduced, and the construction period of a project is prolonged. Therefore, the structure of the drag head needs to be optimally designed to solve the problem of insufficient mud passing performance.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drag suction dredger drag head which has simple and compact structure design and convenient use and guarantees the mud passing performance for solving the technical problems existing in the prior art.

The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a drag suction dredger drag head for ensuring mud passing performance comprises an outer shell and an inner shell nested in the outer shell, wherein the outer shell and the inner shell are hinged and connected by two rotating shafts respectively positioned at two sides; the bottom of the outer shell is provided with a water guide box, the top of the outer shell is provided with a water inlet pipe, the lower end of the water inlet pipe extends into the outer shell, the end part of the water inlet pipe is communicated with the water guide box, and the bottom of the water guide box is provided with a plurality of water spray holes; a cone is arranged behind the outer shell, and a connecting pipe with a flange plate is arranged behind the cone; the inner shell comprises an inner shell, a front frame and a cover plate, wherein the left side and the right side of the front part of the inner shell are fixedly welded with side plates, a cross beam is arranged between the two side plates, two inner side bases are arranged on the cross beam, the bottom of the cross beam is provided with the front frame, and the cover plate is provided with two outer side bases; the suspension arm is hinged with the inner side base and the outer side base on the left side, and the other suspension arm is hinged with the inner side base and the outer side base on the right side; the bottom of the cross beam is provided with a plurality of mounting seats with threaded holes along the length direction, and rake teeth are mounted on the mounting seats through fastening screws.

The utility model has the advantages that: the utility model provides a simple compact trailing suction hopper dredger harrow head of assurance mud trafficability characteristic of structural design compares with current harrow head, sets up the water guide box and the inlet tube that the installation set up and the water guide box link up through the bottom at the shells in this technical scheme, makes the harrow head get into in the water guide box and via the hole for water spraying blowout via the supply channel at the high pressure water source in the course of the work, carries out the brute force to erode the ground of harrow head below, the mode of stirring while scouring and trailing suction has so obviously promoted the efficiency of trailing suction. Because the high-pressure water source dilutes the mud near the drag head, the trafficability of the mud is ensured, and large mud blocks can be crushed. Through set up anterior frame and set up by pull rod, the apron that davit control verts in the front portion at the drag head, make the front portion of drag head can be by the apron complete closing cap or open completely, when the apron was opened completely, in near the hydroenergy of drag head can get into the drag head, produced an impact action towards the cone direction or the disturbance to the inside mud of drag head, can further guarantee the trafficability characteristic of mud.

Preferably: an inner fixed grid is arranged at the connecting position of the inner cavities of the outer shell and the cone.

Preferably: and all the mounting seats are welded and fixed on the cross beam.

Preferably: a plurality of wear-resisting blocks are arranged at the bottom of the side plate on the left side and the bottom of the side plate on the right side along the length direction, and each wear-resisting block is fixedly connected with the side plate through bolts.

Preferably: and pull rods are connected in the connecting holes of the two suspension arms.

Preferably: the included angle a between the spraying direction of the water spraying holes and the vertical direction is more than or equal to 15 degrees and less than or equal to 30 degrees.

Drawings

Fig. 1 is a schematic side view of the present invention;

fig. 2 is a schematic structural view, a lower view, of the present invention;

fig. 3 is a schematic structural view of the present invention, the lower view.

In the figure: 1. a connecting pipe; 2. a cone; 3. a water inlet pipe; 4. an outer housing; 5. a rotating shaft; 6. an inner housing; 7. a side plate; 8. an inner base; 9. a pull rod; 10. a suspension arm; 11. an outer base; 12. a cover plate; 13. a wear-resistant block; 14. fastening screws; 15. a mounting seat; 16. a water guiding box; 16-1, water spraying holes; 17. a front frame; 18. and the inner fixed grid.

Detailed Description

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

referring to fig. 1 to 3, the drag head of the drag suction dredger for ensuring mud passing performance of the present invention includes an outer shell 4 and an inner shell 5 embedded in the outer shell 4, and the two are hinged to each other by two rotating shafts 5 respectively located at two sides. The inner housing 6 can be turned up due to the hinged connection between the inner housing 6 and the outer housing 4.

The bottom of the outer shell 4 is provided with a water guide box 16, the top of the outer shell 4 is provided with a water inlet pipe 3, the lower end of the water inlet pipe 3 extends into the outer shell 4, the end part of the water inlet pipe is communicated with the water guide box 16, and the bottom of the water guide box 16 is provided with a plurality of water spray holes 16-1. In the process of trailing suction construction, an external water supply pipeline connected with the water inlet pipe 3 presses a high-pressure water source into the water guide box 16, and the high-pressure water source is sprayed out through the water spray holes 16-1, so that a strong scouring effect is generated on the ground below the drag head, and the trailing suction efficiency of slurry is improved. Under the scouring action of a high-pressure water source, the slurry near the drag head is diluted, so that the passing property of the slurry is improved, and the accidents of port plugging, pipe plugging and pump plugging are not easy to happen.

In the embodiment, the included angle a between the spraying direction of the water spraying holes 16-1 and the vertical direction is more than or equal to 15 degrees and less than or equal to 30 degrees, and preferably is 20 degrees.

A cone 2 is arranged behind the outer shell 4, and a connecting pipe 1 with a flange plate is arranged behind the cone 2. In the process of trailing suction construction, the connecting pipe 1 is in butt joint connection with a mud discharge pipeline through a flange plate, and mud obtained by trailing suction enters a drag head and is conveyed to a mud cabin of a trailing suction dredger along the cone 2, the connecting pipe 1 and the mud discharge pipeline.

The left side and the right side of the front part of the inner shell 6 are respectively welded and fixed with a side plate 7, a cross beam is arranged between the two side plates 7, two inner side bases 8 are arranged on the cross beam, and a front frame 17 is arranged at the bottom of the cross beam. The device also comprises a cover plate 12, and two outer bases 11 are arranged on the cover plate 12. And the lifting arm comprises two lifting arms 10 with connecting holes, wherein one lifting arm 10 is hinged with the left inner base 8 and the outer base 11, and the other lifting arm 10 is hinged with the right inner base 8 and the outer base 11.

In this embodiment, the two inner bases 8 are welded and fixed to the cross beam, and the two outer bases 11 are welded and fixed to the cover plate 12. In this embodiment, the tie rods 9 are connected in the connecting holes of the two suspension arms 10, and the two suspension arms 10 are driven to synchronously tilt through the tie rods 9.

In the initial and final stages of the drag suction construction, facilities on the drag suction ship lift and lower the whole drag head through a pull rod 9; in the middle stage of the trailing suction construction, the boom 10 can be pulled or pushed by the pull rod 9 to enable the front cover plate 12 to tilt, the cover plate tilts downwards and then is buckled with the front frame 17, the front part of the drag head is blocked, the drag head tilts upwards and then is separated from the front frame 17, and the front part of the drag head is opened. When the rake head is opened, a large amount of mud-water mixture enters the rake head, certain impact and flushing effects can be generated on the inside of the rake head and a mud discharge pipeline, so that pipe blockage accidents are prevented, and the passing performance of mud is further improved. On the other hand, when the inside of the drag head is blocked, and sundries such as fishing nets enter the drag head, the whole front part of the drag head is lifted on land or on a ship (at the moment, the inner shell 6 is retracted inside the outer shell 4), which is beneficial to cleaning the inside.

The bottom of the cross beam is provided with a plurality of mounting seats 15 with threaded holes along the length direction, rake teeth are mounted on the mounting seats 15 through fastening screws 14, and the rake teeth are used for carrying out rake plowing on the water bottom in the rake suction construction, so that mud is turned and stirred, and the rake suction dredging efficiency of the rake suction ship is improved. In this embodiment, each mounting seat 15 is welded and fixed to the cross beam.

An inner fixed grid 18 is arranged at the position where the inner cavities of the outer shell 4 and the cone 2 are connected. The inner fixed grate 18 is present as a second barrier for the drag head, and impurities entering the drag suction port, such as fishing nets, stones and the like, are trapped at the inner fixed grate 18. As can be seen from fig. 2, the inner fixed grate 18 is located at the front of the inlet pipe 3, the inlet pipe 3 penetrates the middle of the cone 2, and after passing through the inner fixed grate 18, the slurry moves from the space on both sides of the inlet pipe 3 to the rear of the cone 2 and finally is discharged out of the sludge discharge pipe via the connecting pipe 1.

In this embodiment, a plurality of wear-resistant blocks 13 are mounted on the bottom of the left side plate 7 and the bottom of the right side plate 7 along the length direction, and each wear-resistant block 13 is fixedly connected with the side plate 7 by a bolt. The function of each wear block 13 is to prevent premature wear of the bottom of the drag head. Each wear-resistant block 13 can be made of wear-resistant alloy, and a wear-resistant layer can be arranged on the surface of a common steel ingot.

Claims

1. The utility model provides a guarantee trailing suction hopper dredger harrow head of mud trafficability characteristic: comprises an outer shell (4) and an inner shell (6) nested in the outer shell (4), wherein the two are hinged by two rotating shafts (5) respectively positioned at two sides; a water guide box (16) is arranged at the bottom of the outer shell (4), a water inlet pipe (3) is installed at the top of the outer shell (4), the lower end of the water inlet pipe (3) extends into the outer shell (4) and the end part of the water inlet pipe is communicated with the water guide box (16), and a plurality of water spray holes (16-1) are arranged at the bottom of the water guide box (16); a cone (2) is arranged behind the outer shell (4), and a connecting pipe (1) with a flange plate is arranged behind the cone (2);

the left side and the right side of the front part of the inner shell (6) are respectively fixedly welded with a side plate (7), a cross beam is arranged between the two side plates (7), two inner side bases (8) are arranged on the cross beam, a front frame (17) is arranged at the bottom of the cross beam, the inner shell further comprises a cover plate (12), and two outer side bases (11) are arranged on the cover plate (12); the suspension arm structure is characterized by further comprising two suspension arms (10) with connecting holes, wherein one suspension arm (10) is hinged with the inner side base (8) and the outer side base (11) on the left side, and the other suspension arm (10) is hinged with the inner side base (8) and the outer side base (11) on the right side;

a plurality of mounting seats (15) with threaded holes are arranged at the bottom of the cross beam along the length direction, and rake teeth are mounted on each mounting seat (15) through fastening screws (14).

2. A drag head for a drag suction dredger ensuring mud passage as claimed in claim 1, wherein: an inner fixed grid (18) is arranged at the position where the inner cavities of the outer shell (4) and the cone (2) are connected.

3. A drag head for a drag suction dredger ensuring mud passage as claimed in claim 1, wherein: each mounting seat (15) is welded and fixed on the cross beam.

4. A drag head for a drag suction dredger ensuring mud passage as claimed in claim 1, wherein: a plurality of wear-resistant blocks (13) are arranged at the bottom of the side plate (7) on the left side and the bottom of the side plate (7) on the right side along the length direction, and the wear-resistant blocks (13) are fixedly connected with the side plate (7) through bolts.

5. A drag head for a drag suction dredger ensuring mud passage as claimed in claim 1, wherein: the connecting holes of the two suspension arms (10) are connected with pull rods (9).

6. A drag head for a drag suction dredger ensuring mud passage as claimed in claim 1, wherein: the included angle a between the spraying direction of the water spraying holes (16-1) and the vertical direction is more than or equal to 15 degrees and less than or equal to 30 degrees.