Hydraulic impact wrench
A technology of impact wrench and water pressure, which is applied in the direction of fluid pressure actuating device, manufacturing tool, valve operation/release device, etc., which can solve the problems of increased loss along the oil inlet and oil return pipe, pollution of the environment, and adding devices, etc. , achieving the effects of reduced fault repair time, good environmental compatibility, and reduced MTTR
Inactive Publication Date: 2011-04-20
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
[0004] ●Strict requirements on sealing. Once the hydraulic oil and water leak into each other, it will not only pollute the environment, but also accelerate the damage of the system components, greatly reducing the reliability and service life of the tool, and when working at a large depth, this kind of leakage is will inevitably happen;
[0005] The viscosity of hydraulic oil is high, and its viscosity temperature and viscosity coefficient are large. With the expansion of operating depth and range, the loss along the oil inlet and return pipes of the system increases; When it exceeds 150m, special design is required, and the efficiency is low
[0006] ●Because it is a closed system, it is necessary to add devices to balance the water depth pressure, which increases the complexity of the system
Method used
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[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0016] figure 1 The torque-adjustable seawater hydraulic impact wrench shown adopts a modular design, and the whole is divided into components with relatively independent functions. It consists of a driving mechanism 1.1 and a wrench mechanism 1.2. The driving mechanism 1.1 is connected to the wrench mechanism 1.2, and drives the wrench mechanism 1.2 to work.
[0017] Driving mechanism 1.1 structure such as figure 2 As shown, it is mainly composed of a seawater hydraulic motor 2.1, a reversing valve assembly 2.3, a switch throttle assembly 2.4, an overcurrent handle 2.6, a trigger 2.5, and a quick change joint 2.7. The overflow handle 2.6 is a hollow structure as the water inlet pipe. The lower end of the handle 2.6 is provided with a quick-change joint 2.7, which is connected to the power source through the quick-change joint. 2.1. The trigger 2.5 ...
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The invention provides a hydraulic impact wrench, which comprises a driving mechanism and a wrench mechanism which are connected mutually, wherein the driving mechanism comprises an current passing handle, a switch throttle valve module, an inversing valve module and a seawater or fresh water hydraulic motor in turn from bottom to top; the switch throttle valve module is provided with a trigger; and the seawater or fresh water hydraulic motor is connected with the wrench mechanism. The tool directly takes seawater or fresh water as a working medium to carry out assembling / disassembling operation on threaded connecting pieces, is mainly used in the fields such as undersea repair and maintenance of ships, underwater buildings, and lake and riverway projects, and has the characteristics of high reliability, adjustable output torque, no limitation to underwater operational depth, wide operating range, high efficiency and good environmental compatibility.
Description
technical field [0001] The invention relates to an underwater working tool, in particular to a hydraulic impact wrench. Background technique [0002] The impact wrench is mainly used for the installation and disassembly of threaded connectors to improve work efficiency and assembly quality and reduce labor intensity. It is widely used in the fields of underwater repair and maintenance of ships and underwater construction. [0003] The earliest impact wrenches for underwater operations were generally refitted from land-use electric tools. Considering the requirements of water sealing, electrical insulation, and pressure compensation, the refitted tools were more complex, bulky, and less reliable and safe. According to the driving method, impact wrenches are divided into three types: electric, pneumatic and hydraulic. The pneumatic impact wrench does not need to consider the problem of electrical insulation, and the work safety is improved. Pneumatic tools generally have the...
Claims
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IPC IPC(8): B25B21/02F15B13/02F16K1/14F16K31/60
Inventor 刘银水吴德发赵立志蒋卓郭志恒毛旭耀
Owner HUAZHONG UNIV OF SCI & TECH