Trailing suction hopper dredger side suction port air bag sealing device

An airbag sealing and airbag technology, which is applied to earth movers/shovels, mechanically driven excavators/dredgers, construction, etc., can solve problems such as lack of sealing effect, shortened life of airbags, lack of support, etc., to achieve Guaranteed reliability, sufficient compensation margin, and extended service life

Pending Publication Date: 2020-03-31
NANJING CHANGJIANG WATERWAY ENG BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relative movement between the slider and the mud suction port, the inflated airbag will be rubbed against; if the airbag inflation pressure is too small, the sealing effect will not be achieved. Or too small will accelerate the wear of the airbag; because the airbag is an elastic part and lacks support, when it is installed into the slider, if it is installed improperly, it will easily cause a small part of the airbag to protrude from the slider, so that it will be broken when it is put into the water
At present, many design units and shipyards in the industry are tackling this problem, but have not been able to solve it

Method used

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  • Trailing suction hopper dredger side suction port air bag sealing device
  • Trailing suction hopper dredger side suction port air bag sealing device
  • Trailing suction hopper dredger side suction port air bag sealing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A side suction airbag sealing device 12 of a raking suction dredger, comprising a slider 11 body, an airbag chamber 21, a top tongue 31, a pressure plate, a pushback spring, and an airbag 23.

[0033] The airbag cavity 21 is an annular groove with a rectangular cross section, which is arranged on the side of the slider 11 body facing the hull 14. The opening direction of the annular groove is towards the hull 14, and its diameter matches the 13 mouths of the hull 14 suction pipes. 21 is provided with an opening at the bottom.

[0034]The top tongue 31 is an annular sliding block, the bottom of the section is wider, and the top has a boss, forming a "convex" shape; the bottom of the top tongue 31 is located in the airbag cavity 21, and the top boss of the top tongue 31 faces the hull 14 and is fixed on the boss. There is a self-lubricating polymer elastic ring 32, and the inner diameter, outer diameter, and thickness of the top tongue 31 bottom match the airbag cavity 21...

Embodiment 2

[0036] A side suction airbag sealing device 12 of a raking suction dredger, comprising a slider 11 body, an airbag chamber 21, a top tongue 31, a pressure plate, a pushback spring, and an airbag 23.

[0037] The airbag cavity 21 is an annular groove with a rectangular cross section, which is arranged on the side of the slider 11 body facing the hull 14. The opening direction of the annular groove is towards the hull 14, and its diameter matches the 13 mouths of the hull 14 suction pipes. 21 is provided with an opening at the bottom; the bottom of the airbag cavity 21 is provided with stop steps 22 above the opening, and the distance between the stop steps 22 is smaller than the width of the bottom of the top tongue 31 . The top tongue 31 is an annular sliding block, the bottom of the section is wider, and the top has a boss, forming a "convex" shape; the bottom of the top tongue 31 is located in the airbag cavity 21, and the top boss of the top tongue 31 faces the hull 14 and i...

Embodiment 3

[0039] Such as Figure 1~5 As shown, a side suction airbag sealing device 12 of a trailing suction dredger includes a slider 11 body, an airbag cavity 21 , a top tongue 31 , a pressure plate, a reverse thrust spring, and an airbag 23 .

[0040] The airbag cavity 21 is an annular groove with a rectangular cross section, which is arranged on the side of the slider 11 body facing the hull 14. The opening direction of the annular groove is towards the hull 14, and its diameter matches the 13 mouths of the hull 14 suction pipes. 21 is provided with an opening at the bottom; the bottom of the airbag cavity 21 is provided with stop steps 22 above the opening, and the distance between the stop steps 22 is smaller than the width of the bottom of the top tongue 31 . The top tongue 31 is an annular sliding block, the bottom of the section is wider, and the top has a boss, forming a "convex" shape; the bottom of the top tongue 31 is located in the airbag cavity 21, and the top boss of the...

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Abstract

The invention relates to the technical field of dredging engineering machinery and discloses a trailing suction hopper dredger broadside suction port air bag sealing device. The device comprises a sliding block body, an air bag cavity, a top tongue, a pressing plate, a reverse thrust spring and an air bag, wherein the air bag cavity is formed on a side, facing a ship body, of the sliding block body, the top tongue is located in the air bag cavity, a top tongue top boss faces the ship body, an elastic ring is fixed to the boss, the pressing plate is fixed to a sliding block and presses two sides of the top tongue boss, a reverse thrust spring is located between an inner side of the pressing plate and the top tongue, and the air bag is located in a cavity between the top tongue and the air bag cavity. The device is advantaged in that the elastic ring has certain thickness, stroke compensation allowance of a piston is sufficient, friction loss can be reduced, the device can adapt to relative movement and slight inclination between sealing surfaces, and good sealing is kept; the air bag is not directly rubbed with a dredge pipe, so the risk of mechanical damage is avoided, a fault occurrence rate is reduced, and the service life of the air bag is prolonged; the air bag directly pushes the top tongue, and telescopic reliability of the top tongue is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of dredging engineering machinery, and in particular relates to a side suction air bag sealing device of a trailing suction dredger. Background technique [0002] The existing trailing suction dredger is a large self-propelled trailing suction dredger equipped with a drag head excavator and a hydraulic dredging device. When dredging, the rake suction pipe is lowered along the side of the ship, and the slider installed on the upper end of the rake suction pipe moves to the port of the dredge suction pipe on the side to connect with the hull suction port, and the lower end of the rake suction pipe falls on the river / sea bed. The river / sea bed is broken by the weight of the rake head itself, and a sealed space is formed inside the rake head for mud mixing. Using the vacuum effect of the mud pump in the cabin, the mud is absorbed from the river / seabed through the rake head and the suction pipe and enters the dre...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): E02F5/28E02F3/88
CPCE02F5/28E02F3/885
Inventor张春芮迪文李小波彭陵生李志朋陈康陆小霞王坤林海王成革汪英明徐景欣吕德永丁媛媛朱文博刘奇孔华杰汪开华杨涛王立东田效东程东张大伟刘利娜刘娟施家慧董光辉
OwnerNANJING CHANGJIANG WATERWAY ENG BUREAU