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Underwater hydraulic impacting shovel

A hydraulic impact and hydraulic cylinder technology, applied in the field of impact shovel, can solve the problems of increased friction force of the sealing structure, the sealing cannot meet the requirements, and the impact efficiency is greatly affected, so as to increase the impact force, improve the efficiency, and increase the impact energy.

Inactive Publication Date: 2008-11-26
CHINA NAT OFFSHORE OIL CORP +2
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AI Technical Summary

Problems solved by technology

When the hydraulic impactor used on land is used underwater, the material will first be in danger of corrosion, and because the external environment is water, the seal cannot meet the requirements
When the land-based hydraulic impact shovel is modified and used underwater, it is only modified in some parts, the friction of the sealing structure increases, and the impact of water on the impact efficiency is also great.

Method used

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Embodiment Construction

[0029] The invention discloses an underwater hydraulic impact shovel, such as figure 1 Shown is a schematic diagram of its working principle. In the figure, the hydraulic cylinder 1 is divided into a variable pressure chamber 11 and a normal high pressure chamber 12 by the piston 21 of the piston rod 2. In addition, a high pressure nitrogen chamber 13 is arranged at the rear of the hydraulic cylinder, and the piston rod 2 is divided into a front rod 22 and a rear bar 23. In the figure, the oil distributing valve 3 includes four ports A, B, C, and D, and a cone spool 31 and a spool 32 of the oil distributing valve are also arranged inside it. In addition, a through hole is also arranged in the spool 32. 33.

[0030] Such as figure 1 In the state shown, the high-pressure oil from the oil pump enters the oil distribution valve 3 through the D port, and then enters the left chamber 34 of the valve core through the through hole 33 of the valve core. The spring 35 pushes the spo...

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Abstract

The invention relates to a underwater hydraulic impact shovel, which comprises: a main body, a hydraulic cylinder arranged at the middle part of said main body; a nitrogen room at the back of hydraulic cylinder; a piston rod inside the hydraulic cylinder, whose piston is contacted to the inner wall of hydraulic cylinder and front rod extends to the front part of hydraulic cylinder and back rod extends to the back part of hydraulic cylinder to be inserted into the nitrogen room; a oil way control valve on the side wall of main body; a oil distributing valve inside the main body and via which said oil way control valve and hydraulic cylinder are connected; a handle at the back end of main body; and a impact shovel connected to the front rod of said piston rod. The invention can adjust the pre-tension force of spring of one-way valve, to adjust the opening pressure of one-way valve, and adjust the impact frequency of impact shovel. Therefore, the invention can adjust the impact frequency according to the object.

Description

technical field [0001] The invention relates to an impact shovel, in particular to an underwater hydraulic impact shovel. Background technique [0002] The maintenance work of underwater oil and gas pipelines is affected by the special working environment, and the work efficiency is low and the risk is high. Moreover, there is a lack of special equipment to assist the work, resulting in the inability to improve work efficiency and excessive labor intensity of workers. For example, to complete the demolition of the concrete counterweight layer on the surface of submarine oil and gas pipelines, or to complete the damage of underwater concrete components, it is necessary to use hydraulic impactors. At present, most of the hydraulic impactors used are hydraulic impactors suitable for land, and only a few Several foreign companies produce underwater hydraulic impactors transformed from land-based hydraulic impactors. When the hydraulic impactor used on land is used underwater, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B1/32
Inventor 王立权房晓明刘贺平孟庆鑫郭黎斌侯恕萍潘东民高峰
Owner CHINA NAT OFFSHORE OIL CORP
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