Chain armor type flap valve

Abstract

The invention relates to a chain armor type flap valve which comprises a valve base and a chain armor type valve clack. The valve clack comprises elastic sealing rings, elastic connecting strips, sealing parts and multiple lock strips sequentially arranged in parallel. The elastic connecting strips connect all the lock strips in series, and the elastic sealing rings hoop all the lock strips together to form a whole structure. Each lock strip is provided with a clamping groove fit with the corresponding elastic sealing ring. The elastic sealing rings are installed in the clamping grooves. The sealing parts are arranged between every two adjacent lock strips. One end of the valve clack is movably connected to the outer side wall of the upper end of the valve base. The top of the valve base is provided with a valve opening sealing face matched with the valve clack. When the valve clack makes contact with the valve base in a sealing manner, the two adjacent lock strips make contact in a sealing manner. According to the flap valve, the deformation ability of the valve clack is high, the sealing and fitting position can be adjusted automatically, the success rate of matching is high, andthe sealing performance is reliable. The flap valve is particularly applicable to sealing of the lower end of a pressure keeping cylinder in the pressure keeping and core pulling process, in the opening process, the valve clack can be attached to the outer wall of the pressure keeping cylinder closely, space is saved, and the flap valve has a reverse self-locking characteristic in the pressure keeping and stressing process.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a chain mail flap valve. Background technique [0002] Core drilling is an exploration method often used in geological exploration of solid minerals. The cylindrical drill bit and the drilling tool break the rock along the circumference at the bottom of the hole, and a columnar core is kept in the center of the hole bottom, and the core is taken out from the hole to study the geological and mineral conditions, so it is called core drilling. [0003] The coring barrel usually includes the outer barrel of the drilling rig and the core barrel. The cylindrical drill bit is installed at the bottom of the outer barrel of the drilling rig. The core barrel is located at the inner periphery of the outer barrel of the drilling rig. , the core enters the core barrel from the lower end of the core barrel and is grasped by the core catcher. After drilling, the core barrel is pulled up, and t...

AI Technical Summary

Problems solved by technology

The structure of the ball valve is relatively complex and occupies a large space, which limits the diameter of the drilled core. The processing technology of the ball valve is high, and when the pressure is high, the liquid in the pressure-holding cylinder will leak from the gap between the ball valve and the core cylinder. High pressure cannot be maintained; although the existing flap valve has a simple structure and can maintain high pressure, its disc is in a fixed shape and cannot be deformed, and the matching success rate is low

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