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Umbrella reamer bit assembly

A reaming drill bit and umbrella-type technology, which is applied in the direction of drill bits, drilling equipment, earthwork drilling and mining, etc., can solve the problems of inability to carry out pile pressing work and difficulty in pile pressing, and achieve a large adjustment range of contraction angle, uniform force, The effect of simple structure

Active Publication Date: 2015-04-08
江苏谷登重型机械装备科技有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the construction of the traditional static pile driver, the pile is directly held and the pile is statically pressed downward without drilling or reaming. Pile is difficult, even under some geological conditions, the traditional static pile driver cannot carry out the pile pressing work

Method used

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  • Umbrella reamer bit assembly
  • Umbrella reamer bit assembly
  • Umbrella reamer bit assembly

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Embodiment Construction

[0034] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] like Figure 1 ~ Figure 4 Shown, the present invention is a kind of umbrella type reaming drill bit, comprises water cylinder body 19 and drill bit 15.

[0036] The water cylinder body 19 has an inner closed space 20 . The water cylinder body 19 includes a rear shell 4 and a front shell 11 which are fixedly connected to each other. The rear end of the rear shell 4 is connected with an end cover 13 , and the front end of the front shell 11 is connected with a sealing cover 3 . A closed space 20 is enclosed by the end cover 13 , the rear casing 4 , the front casing 11 and the sealing cover 3 . The rear end of the rear shell 4 is connected with an external connector 1 .

[0037] A hollow mandrel 10 penetrating through the e...

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Abstract

The invention relates to an umbrella reamer bit assembly comprising a water cylinder. A hollow mandrel is fitted in the water cylinder. The water cylinder is provided with a limiter which limits axial motion of the mandrel. The two ends of the mandrel are connected with an inner connector and a bit, respectively. The water cylinder is provided with an outer connector surrounding the inner connector. At least two reamer arms are hinged to the outer wall of the water cylinder. Each reamer arm is hinged to the bit through a connecting rod. A cylinder rod is slidably fitted in the water cylinder. A water cavity is formed among one end, corresponding to the bit, of the cylinder rod, the mandrel and the water cylinder. The water cavity is communicated with the outer connector through a water passage arranged in the water cylinder. A cylinder rod return spring is disposed between one end, corresponding to the inner connector, of the cylinder rod and the water cylinder. The cylinder rod is provided with an unlocking mechanism which opens the limiter. The umbrella reamer bit assembly has drilling and reaming functions, has a large contraction angle adjusting range, is capable of evenly bearing stress, high in structural strength and simple in structure and can meet the requirements on drilling and reaming.

Description

technical field [0001] The invention relates to a static pile driver used in a building construction site, in particular to an umbrella type reaming drill bit used for pile sinking and reaming when the static pile driver presses piles. Background technique [0002] Static pile driver refers to a pile mechanical construction equipment that uses static pressure to press piles into the ground. It is suitable for soft soil layered pile projects, such as underground railways, seaports, bridges, reservoir power stations, offshore oil production platforms and national defense projects. And other piling construction. [0003] During the construction of the traditional static pile driver, the pile is directly held and the pile is statically pressed downward without drilling or reaming. The pile is difficult, and even under some geological conditions, the traditional static pile driver cannot carry out the pile pressing work. Contents of the invention [0004] In view of the above...

Claims

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Application Information

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IPC IPC(8): E21B10/32
CPCE21B10/322
Inventor 陈凤钢戴斌安倪万兵程熙陈月华
Owner 江苏谷登重型机械装备科技有限公司
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