Dropping prevention mechanism of device for lifting four-corner drill tower from ground

Abstract

The invention discloses a dropping prevention mechanism of a device for lifting a four-corner drill tower from the ground. The dropping prevention mechanism comprises a column, a lifting bracket, a dropping prevention rack, a trailer, a guiding wheel, a traction rope, a traction pin, a pawl, a fixing pin, a spring and a bolt, wherein an opening is formed in the side face of a column, teeth of the dropping prevention rack are zigzag, a working face is a right-angle side or an approximately right-angled bevel side, the other side is a bevel side greater than 90 degrees, the dropping prevention rack is installed on the side face of the column, the trailer is movably installed in the column, the guiding wheel is installed at the front end of the trailer in a rotary mode, the pawl is rotatably installed on the trailer by utilizing the fixing pin, and the fixing pin is located in the middle of the pawl. A ratchet is arranged at one end of the pawl and faces the dropping prevention rack, the other end of the pawl is rotatably provided with a connector by utilizing the traction pin, and the traction rope is connected with the connector. After the traction rope breaks, the springs rapidly presses the ratchet, the ratchet is matched with the dropping prevention rack due to the fact that the upper tooth-shaped side of the dropping prevention rack is the right-angle side, the right-angle side serves as a supporting surface for supporting the trailer, the trailer rapidly stops to prevent dropping.

Description

technical field [0001] The invention belongs to the technical field of protection devices for ground lifting devices of square drilling towers, and specifically relates to a fall prevention mechanism for ground lifting devices of square drilling towers. Background technique [0002] The ground lifting device of the four-corner drilling tower plays an important role in the vertical transportation of goods in production and life. Machine shaft breakage, working brake failure, gear breakage of the reducer or loosening of intermediate connectors, etc., cause heavy objects to fall over speed, causing major accidents that cause equipment casualties. The protection device is mostly a single fall arrester, which has certain potential safety hazards. When the ground lifting device of the four-corner drilling rig accidentally falls, due to the huge impact load generated instantaneously, the gear at the end of the fall arrester may be knocked off, causing The fall arrest device failed...

AI Technical Summary

Problems solved by technology

[0002] The ground lifting device of the four-corner drilling tower plays an important role in the vertical transportation of goods in production and life. Machine shaft breakage, working brake failure, gear breakage of the reducer or loosening of intermediate connectors, etc., cause heavy objects to fall over speed, causing major accidents that cause equipment casualties. The protection device is mostly a single fall arrester, which has certain potential safety hazards. When the ground lifting device of the four-corner drilling rig accidentally falls, due to the huge impact load generated instantaneously, the gear at the end of the fall arrester may be knocked off, causing Fall arrest device failure and fall casualties

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