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Bypass cutoff hydraulic lock

A hydraulic lock and bypass technology, which is applied in the direction of fluid pressure actuation device, fluid pressure actuation system safety, mechanical equipment, etc., can solve the problems of complex structure and insufficient function, and achieve simplified control system, small size and reduced The effect of operating force

Inactive Publication Date: 2010-06-30
704TH RES INST OF CHINA SHIPBUILDING IND CORP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Due to the special requirements of marine equipment, it is often required that the hydraulic machine has an emergency manual function. At this time, the working chamber of the hydraulic cylinder needs to be connected by two people; in view of this, the US patent US5349818 proposes a marine hydraulic steering gear with a low quiet zone. The steering system The hydraulic lock (blocking valve) of the company consists of a valve body with a spool valve that can reciprocate and slide in the valve sleeve. The first and second ports of the valve body are connected by a manual pump, and the third and fourth ports are connected to double-acting hydraulic cylinders. The cylinder is connected with the rudder or the steering motor, and a valve is set in the hydraulic lock to prevent the flow of liquid between the ports, so that the rudder can be kept at a fixed position. In addition to realizing the function of the hydraulic lock, the third and fourth ports beside the Compared with the existing schemes of setting two working oil chamber side oil passages on the hydraulic cylinder with a stop valve or setting a bypass circuit on the hydraulic circuit, it has made great progress, but its structure is still relatively complicated, and its function It is still insufficient to meet the special needs of marine equipment

Method used

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Embodiment Construction

[0012] refer to figure 1 , 2 , 4, bypass cut-off hydraulic lock includes valve body 1, hydraulic lock 2, left bypass valve 3, right bypass valve 3', cut-off valve 4 and main spool 5, hydraulic lock 2, left and right bypass The valves 3, 3', the shut-off valve 4 and the main valve core 5 are all accommodated in the valve body 1, and are formed with interrelated passages.

[0013] The valve body 1 is a block-shaped member, in which there is a cavity capable of accommodating various components, and its side is equipped with a hydraulic cylinder left oil circuit 11 and a hydraulic cylinder right oil circuit 11', and the two oil circuits are respectively connected to The left and right working chambers of the hydraulic cylinder.

[0014] The hydraulic lock 2 includes a hydraulic control valve core 21, a hydraulic lock valve seat 22, a hydraulic lock steel ball 23, a positioning sleeve 24, a hydraulic lock spring 25 and a hydraulic lock screw plug 26. The structure and function o...

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Abstract

The invention discloses a bypass cutoff hydraulic lock which mainly solves the technical problems of hydraulic device structure simplification and adopts the technical scheme that a left bypass valve and a right bypass valve are respectively and correspondingly arranged on the left and the right oil channels of a hydraulic cylinder on a valve body; a cutoff valve is arranged on an oil inlet of the valve body; and a main valve core is matched respectively and correspondingly with the left and the right bypass valves and the cutoff valve. The invention is applicable to any hydraulic control device, in particular to the marine hydraulic press in need of emergency manual operation.

Description

Technical field: [0001] The invention relates to a component of a hydraulic control system, in particular to a hydraulic lock of a marine hydraulic machine. Background technique: [0002] At present, the hydraulic lock is the main component of the marine hydraulic press to control the electromechanical equipment. It cooperates with the reversing valve and other hydraulic control components to make the hydraulic press stay at any working position according to the setting, thereby effectively controlling the movement of related equipment. Due to the special requirements of marine equipment, it is often required that the hydraulic machine has an emergency manual function. At this time, the working chambers of the two hydraulic cylinders need to be connected; in view of this, US Patent No. 5,349,818 proposes a marine hydraulic steering gear with a low quiet zone. The steering system The hydraulic lock (blocking valve) of the company consists of a valve body with a spool valve th...

Claims

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Application Information

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IPC IPC(8): F15B20/00
Inventor 柯明纯赵建斌唐勇余炅孙晔
Owner 704TH RES INST OF CHINA SHIPBUILDING IND CORP
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