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Reamer for cutter-suction dredger

A cutter suction dredger and reamer technology, applied in mechanically driven excavators/dredgers, etc., can solve the problems of short life, easy breakage, poor wear resistance of the reamer teeth, etc. Reduced wear and improved installation angle

Active Publication Date: 2013-08-28
HARBIN GUANGHAN POWER TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a cutter suction dredger reamer to solve the problems of poor wear resistance, easy breakage and short service life of integrally cast reamer teeth

Method used

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  • Reamer for cutter-suction dredger
  • Reamer for cutter-suction dredger
  • Reamer for cutter-suction dredger

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0010] Specific implementation mode one: combine Figure 1 to Figure 5 Describe this embodiment, this embodiment comprises reamer tooth 1 and reamer seat 2, and the head of reamer seat 2 is provided with seven-sided wedge-shaped head 2-1, and seven-sided wedge-shaped head 2-1 is the first slope 2-1 respectively. 1-1, the second slope 2-1-2, the third slope 2-1-3, the fourth slope 2-1-4, the fifth slope 2-1-5, the sixth slope 2-1-6 and the Seven inclined planes 2-1-7, the end face of the tail of the reamer tooth 1 is provided with a seven-sided wedge-shaped groove 1-1 matched with the seven-sided wedge-shaped head 2-1, and the seven-sided wedge-shaped groove 1-1 is the eighth inclined plane 1 -1-1, ninth slope 1-1-2, tenth slope 1-1-3, eleventh slope 1-1-4, twelfth slope 1-1-5, thirteenth slope 1-1 -6 and the fourteenth bevel 1-1-7, the seven-sided wedge-shaped head 2-1 is closely connected with the seven-sided wedge-shaped groove 1-1, so that the design of the reamer tooth 1 ...

specific Embodiment approach 2

[0011] Specific implementation mode two: combination Figure 8 Describe this embodiment, the sand-facing surface 2-2 thickness of the reamer seat 2 of this embodiment increases 10mm~15mm, reduces the thickness of front end grinding surface 1-2 correspondingly, the grinding of the thickness of front end grinding surface 1-2 The amount is that the total weight of the reamer tooth 1 and the reamer seat 2 is reduced by 5% to 10%. The thickness of the sand-facing surface of the existing reamer used for dredgers is 8 mm. After the thickness of the sand-facing surface 2-2 of the reamer 2 of the present invention is increased by 10 mm to 15 mm, the service life of the reamer 2 is improved. At the same time, reducing the thickness of the grinding surface 1-2 at the front end reduces the total weight of the reamer and correspondingly reduces the load on the motor. Other compositions and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0012] Specific Embodiment Three: This embodiment is described in conjunction with 1. The reamer teeth 1 and reamer seat 2 of this embodiment are casted with ZG34. The reamer teeth and the reamer seat of the existing dredger reamer adopt medium-strength cast steel materials such as ZG35Mn, ZG35CrMnSi or ZG35CrMo. ZG35 is high-strength cast steel, therefore, the reamer tooth 1 and the reamer seat 2 of the present invention have high strength, high hardness and high toughness, thereby improving the wear resistance of the reamer tooth 1 and the reamer seat 2, making it difficult to break off. Other compositions and connections are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

A reamer for a cutter-suction dredger relates to a reamer for a dredger and aims to solve the problems of poor abrasion resistance, high possibility of fracture and short service life of integrally cast reamer tooth. A seven-face wedged head is arranged at the head part of a reamer seat 2; a seven-face wedged groove matched with the seven-face wedged head is formed at the end surface at the tail part of the reamer tooth; the grinding surface at the front end of the reamer tooth is a plane surface and forms an included angle of 14 to 16 degrees with the center line of the reamer seat; the included angle between the bearing surface of the reamer tooth and the center line of the reamer seat is 12 to 14 degrees; the thickness of top end of the tooth tip of the reamer tooth is 20 mm to 30 mm; the included angle between the front end surface of the reamer tooth and the grinding surface at the front end of the reamer tooth is 43 to 45 degrees; the included angle between each of two side surfaces of the reamer tooth and the grinding surface at the front end of the reamer tooth is 50 to 60 degrees; and the installation angle of the reamer tooth and the reamer seat is 61 to 64 degrees. The reamer disclosed by the invention is used on the cutter-suction dredger.

Description

technical field [0001] The invention relates to a reamer for a dredger. Background technique [0002] At present, the cutter suction dredger is the main equipment used in the dredging industry in my country to clean up geological conditions such as sediment, sandstone and weathered rock in the channel. As the main vulnerable part of the cutter suction dredger, the reamer is often used in construction according to different geological conditions. Three types of reamer teeth are wide-toothed, discreet-toothed and sharp-toothed, among which the reamer is the most commonly used. For a long time, due to the poor wear resistance and easy breakage of the cutter teeth, coupled with frequent replacement time, the working efficiency of the dredger has been seriously affected. In order to improve the use efficiency of dredgers, relevant domestic scientific research institutes and factories have adopted various technological measures to solve the problem of low service life, mainly in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F3/92
Inventor 吕成林李东明李桂英张馨
Owner HARBIN GUANGHAN POWER TECH DEV CO LTD