Working principle of lifting machinery
The hoisting machinery lifts or lifts and lifts the weight by means of a lifting hook or other pick-up device. The working process of the lifting machine generally includes steps of lifting, running, lowering and returning to the original position. The hoisting mechanism lifts the heavy object from the picking point by the taking device, shifts the weight through the running, turning or luffing mechanism, and returns the weight to the original position after placing the heavy object at the designated place.
Drive unit
The drive unit is used to drive the power unit of the working mechanism. Common drive devices include electric drives, internal combustion engine drives, and manual drives. Electrical energy is a clean, economical energy source. Electric drive is the main driving type of modern cranes. Almost all rail cranes, elevators, elevators, etc. that operate within a limited range are electrically driven. For mobile cranes that can be moved over long distances (such as truck cranes, tire cranes and crawler cranes), internal combustion engine drives are often used. The human drive is suitable for some light and small lifting equipment, and is also used as a temporary power for auxiliary, backup drive and accident (or accident status) of certain equipment.
Working Organization
Working institutions include: hoisting mechanism, operating mechanism, luffing mechanism and rotating mechanism, which are called the four major institutions of cranes.
(1) The hoisting mechanism is a mechanism for realizing the vertical lifting of materials. It is an indispensable part of any hoisting machinery and is therefore the most important and basic mechanism of the crane.
(2) The operating mechanism is a mechanism for realizing material handling by crane or lifting trolley. It has the functions of trackless operation and rail operation. It is divided into two types according to its driving mode: self-propelled and traction.
(3) The luffing mechanism is a unique working mechanism of the boom crane. The luffing mechanism changes the working range by changing the length and elevation of the boom.
(4) The rotating mechanism is to make the boom rotate around the vertical axis of the crane to transport the material in the annular space. The crane achieves the purpose of carrying materials by a single movement of a mechanism or a combination of multiple mechanisms.
What is a plastic expansion tube and what is its purpose
Refers to a type of plastic fastener used to expand the wall part of the screw.
Plastic expansion pipes, also known as wall expansion rubber particles, are characterized by good elasticity, high tensile strength, impact resistance, non cracking, strong hardness, non rusting, and high elasticity. They are made of PP, PA, PE, and material injection molding. The styles include fish type wall expansion rubber particles, straight through expansion rubber particles, etc., and are used with coarse tooth self tapping screws.
Plastic expansion pipes are suitable for fixing products to concrete solid and hollow walls, gypsum boards, and dense natural stones, base plates, support plates, brackets, railings, windows, doors, curtain walls, machines, beams, purlins, brackets, stairs, exterior wall decorations, and electrical accessories.
Plastic expansion tube referred to as expansion tube, and the expansion tube is called two kinds of products, one is oil expansion tube; One is plastic fastener, plastic expansion tube refers to a plastic fastener type of expansion tube, used for fastening the connection of objects, supporting the use of self-tapping screws.
Plastic Expansion
Material:Carbon steel
color:yellow,white,blue
specification:DIN ANSI
Yellow Good Quality Plastic expansion screw Factory
Plastic expansion screw,Plastic expansion Factory,Yellow Good Plastic expansion
Plastic Expansion
Plastic expansion screw,Plastic expansion Factory,Yellow Good Plastic expansion
Hebei Qianmu Fastener Manufacturing Co., Ltd , https://www.qmjgjfasteners.com