Novel automatic bidirectional throttle valve

Abstract

The invention discloses a novel automatic bidirectional throttle valve which is mainly applied to regulation on the moving speed of a hydraulic cylinder piston. The aim of bidirectional throttling is achieved by arranging a check valve (2) and a needle valve (4) which are used for controlling and regulating the oil inlet amount and oil return amount in the same valve body (1). According to the novel automatic bidirectional throttle valve disclosed by the invention, the check valve (2) is vertically arranged in the valve body (1), the needle valve (4) is horizontally arranged on the oil inlet relief road and oil return main road of the valve body (1), and the needle end is toward one side of a gap of a valve core (7) at the lower part of the check valve (2). The end part of the needle valve (4) is provided with a lock nut (5) which can adjust the oil way gap of the needle valve (4), so that the oil return amount can be adjusted in a stepless manner. The check valve (2) and the needle valve (4) are used in a matching manner, so that automatic bidirectional throttling control can be carried out on the oil inlet return pipeline of the hydraulic system, potential safety hazards such as a vacuum state of a drilling machine, which is formed by negative pressure produced by the rear part of the piston under the action of gravity, and up-down swinging of a drilling rig, which is produced by non-uniform motion of the piston can be eliminated, and the service life of the drilling machine can be effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of mechanical hydraulics, and mainly relates to a novel automatic two-way throttle valve used for balancing and regulating the movement speed of hydraulic cylinder pistons. Background technique [0002] The CS-165E down-the-hole drilling rig is an open-air deep-hole blasting and perforating equipment. It has the following defects during use: the speed of the drilling frame is not uniform during the falling process, and the drilling frame will swing up and down continuously. Cylinder, boom, and the wear-resistant bearings at the six joints of the drill rig cause severe impacts, which shorten their service life. In severe cases, it may cause a fracture accident of the pitching hydraulic cylinder, causing the drill rig to lose its support and fall, directly threatening the operator and equipment safety. The reason for the up and down swing of the drilling rig is: the pitching hydraulic cylinder of the drilling...

AI Technical Summary

Problems solved by technology

Eliminate and solve the vacuum state formed by the negative pressure at the rear of the piston of the hydraulic cylinder under the action of gravity under the action of gravity, as well as the unsafe hidden dangers of the drilling rig swinging up and down caused by the uneven movement of the piston, and improve Rig life

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