Flap structure capable of being automatically triggered

Abstract

The invention relates to a tipping structure capable of being automatically triggered. The tipping structure comprises a tipping valve, an outer cylinder, a core cylinder and a trigger mechanism, wherein the trigger mechanism comprises a trigger inner cylinder and a trigger block, the trigger block is arranged in a through hole of the side wall of the trigger inner cylinder, a protrusion part matched with the trigger block is arranged on the core cylinder, and an avoiding opening matched with the triggering block is formed on the inner wall of the outer cylinder; elastic clamping teeth are arranged on the outer wall of a valve seat, and the elastic clamping teeth are operationally abutted against the through hole on the side wall of the outer cylinder; one end of a spring piece is connected with a valve clack in a sliding mode, and the other end of the spring piece is connected with the outer cylinder; when the core cylinder is located in the valve seat, the lower ends of the elastic clamping teeth are abutted against the through hole, and the valve clack is opened and is located between the trigger inner cylinder and the outer cylinder; and when the core cylinder is lifted upwardsto a certain height, the valve clack returns to the top surface of the valve seat to be in sealing contact with the valve seat, and the trigger inner cylinder is pressed on the valve clack. Accordingto the tipping structure, when the valve is closed, the valve clack is pressed by the trigger inner cylinder, the sealing specific pressure is large, and the sealing performance is reliable; and triggering can be conducted outside the outer cylinder during butt joint operation, so that automatic opening is realized, and the rock core can be pushed into a test cabin from the core cylinder.

Description

Technical field [0001] The invention relates to the technical field of coring equipment, and in particular to an automatically triggered flap structure. Background technique [0002] At present, in the field of pressure keeping and coring, the upper end of the pressure keeping cylinder is generally sealed by a piston, and the lower end of the pressure keeping cylinder is usually sealed by a ball valve or a flap valve. The structure of the ball valve is relatively complex and takes up a large space, which limits the diameter of the drilled core. The processing technology of the ball valve is demanding. When the pressure is high, the liquid in the pressure holding cylinder will seep out from the gap between the ball valve and the core cylinder. , Cannot maintain higher pressure. [0003] Such as figure 1 As shown in the existing flap valve structure, the flap valve includes a valve seat (No. 1) and a valve disc (No. 2). The valve seat is installed on the inner wall of the outer cyli...

AI Technical Summary

Problems solved by technology

In the coring stage, after the core barrel is lifted up to a certain height, the valve clack is automatically closed under the action of the shrapnel (No. 3), but this flap valve structure has poor sealing performance when the sealing specific pressure is small

In addition, when docking with the test chamber, the valve flap can only be opened upwards, and the valve flap is blocked when it is opened, making it difficult to open and inconvenient to operate

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