Gate plate locking device of blowout preventer

Abstract

A gate plate locking device of a blowout preventer comprises a housing, a lateral gate, a hydraulic cylinder, a gate plate spindle, a piston, a locking rod and a locking device. The locking device comprises a locking hydraulic cylinder, a locking piston and a display mechanism. A first hole communicated with a second hole is arranged inside the locking hydraulic cylinder. Two ends of the first hole are respectively provided with a locking end cap and an unlocking end cap. One end of the second hole is connected with the hydraulic cylinder; and the other end is enclosed by the display mechanism. The locking piston is provided with an inclined plane which can be matched with an end face of the locking rod when the locking piston is in a locking position. A hole which is communicated with a hole inside the locking rod is arranged inside the gate plate spindle along a vertical axis of the gate plate spindle. The gate plate locking device of the blowout preventer has the advantages that: 1, a sequence valve does not need to be used; 2, the locking piston is driven to compress by a gravitational force, an elastic force, a magnetic force, a fluid pressure or a force of any combination of the forces above, thereby getting rid of the dependency on the fluid pressure and simplifying the structure and the oil path, accordingly lowering down the processing cost and the failure rate, and increasing the reliability as well as the maintenance convenience.

Description

technical field [0001] The invention relates to a device used for sealing or sealing off boreholes or wells in the drilling of soil layers or rocks, in particular to a ram locking device of a blowout preventer. Background technique [0002] The function of the ram BOP locking device is to lock the ram of the BOP after the BOP is closed, to prevent the ram from moving outward under the fluctuating pressure in the well, and to ensure the stability and safety of the BOP closure. reliability. Locking devices are divided into manual and automatic, and the latter can be divided into electric locking devices and hydraulic locking devices. Hydraulic locking devices account for the majority of automatic locking devices. [0003] "Petroleum Mine Machinery" Volume 36, Issue 10, Pages 1-4, published in 2007, "Research Status of Ram BOP Hydraulic Locking Devices" and "Petroleum Drilling Technology" published in July 2008. Volume 36, No. 4, paper "Research on the Current Situation an...

AI Technical Summary

Problems solved by technology

[0004] Up to now, the inclined piston self-locking mechanism has realized the locking and unlocking actions through the cooperation of sequential valves. And the oil circuit is complicated, processing and maintenance are inconvenient, the locking liquid cylinder is large in size, and the failure rate is high, and hydraulic pressure must be used to actuate the slope piston to move and lock, etc.

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