Screen cloth pressing device of vibrating screen

Abstract

The invention aims to provide a screen cloth pressing device of a vibrating screen, and belongs to the technical field of material vibrating screening equipment. The device comprises a wedge block and a pressing piece fixed to a screen box side plate, a driving wheel and a guide wheel are arranged at the two ends of the screen box side plate respectively, and rack parts meshed with the driving wheel and the guide wheel are arranged at the two ends of the wedge block respectively. At least two guide grooves are formed in the wedge block, a positioning pin shaft is fixed on the screen box side plate, and the free end of the positioning pin shaft extends into the guide grooves; and a handheld part for pushing and pulling the wedge block is arranged at the front end of the wedge block. The wedge block is driven to move back and forth through rotation of the driving wheel, the screen is pressed or loosened, operation is convenient, the structure is firm, the occupied space is small, good abrasion resistance and corrosion resistance are achieved, the service life of the device is prolonged, the device is not limited by a well site air source, and the application place of a product is expanded.

Description

technical field [0001] The invention relates to the technical field of material vibrating screening equipment, in particular to a vibrating screen mesh pressing device. Background technique [0002] The drilling fluid vibrating screen is the primary solids control equipment used in the drilling mud purification system. When the drilling vibrating screen is working, in order to prevent harmful solid particles from entering the screened liquid drilling fluid through the gap between the screen and the screen box, a pressing device is used to compress the screen. Due to the complex composition of the mud and the short service life of the screen, the screen needs to be replaced after a period of use. For this reason, in order to facilitate the replacement of the screen mesh, many researchers have made efforts and explorations for the structural design of the screen mesh pressing device. [0003] Chinese patents CN104646282A, CN204194291U and CN208894619U all disclose a device f...

AI Technical Summary

Problems solved by technology

The use of strip airbags to compress the screen has the following problems: the strip airbags have a long strip structure, the mold accuracy is difficult to guarantee, and the processing is difficult; the cost of the airbags is high, and due to the harsh working environment, the airbags need to have better pressure resistance and Grinding characteristics, the price of the material used is relatively high; the strip-shaped air bag is in direct contact with the screen, which is easily corroded by the mud and punctured by the substances in the mud, resulting in air leakage; when the gas source of the drilling team is unstable or insufficient, the screen will be affected Compression effect

The use of cylinders to compress the screen has the following problems: Since the vibrating screen is a high-frequency vibration device, it is in a state of constant vibration during use, and the cylinder is installed on the screen box, which is not conducive to its use; the rubber seal in the cylinder is in the vibration process. It is easy to wear and cause air leakage, which shortens its service life; the cylinder is installed on the vibrating screen. Due to the small space on site, it is not easy to confirm the installation position. At the same time, the vibrating screen is soaked in mud, and the cylinder is easy to enter sludge and sewage. , is not conducive to maintenance

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