Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hydraulic lifting system of attached tower crane

A tower crane and attached technology, applied in cranes, mechanical equipment, fluid pressure actuating devices, etc., can solve the problems of attached tower cranes and personnel safety hazards, unfavorable energy saving, shortened hydraulic system life, etc. The effect of reducing safety hazards, increasing safety and reducing commutation time

Active Publication Date: 2015-03-11
NANJING TECH UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned method is only suitable for small tonnage and no hydraulic accidents. Once the hydraulic cylinder oil leaks seriously, the hydraulic rod breaks, the hydraulic system fails, and the tonnage is large, the attached tower crane and the tonnage will be damaged. Serious potential safety hazards for personnel, which will have a huge negative impact on society
And when the jacking tonnage is large, using a single hydraulic cylinder for jacking will shorten the life of the hydraulic system, which is not conducive to saving energy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydraulic lifting system of attached tower crane
  • Hydraulic lifting system of attached tower crane
  • Hydraulic lifting system of attached tower crane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The reference signs in the 4 drawings of this embodiment are as follows: fuel tank 1, filter 2, engine 3, one-way quantitative pump 4, first overflow valve 5, third electromagnetic reversing valve 6, pilot overflow valve 7. Pressure gauge 8, accumulator 9, stop valve 10, first electromagnetic reversing valve 11, first hydraulic control check valve 12, PLC controller 13, second electromagnetic reversing valve 14, first check valve 15a, the second one-way valve 15b, the third one-way valve 15c, the fourth one-way valve 15d, the speed regulating valve 15e, the fifth one-way valve 16a, the sixth one-way valve 16b, the seventh one-way valve 16c, the Eight one-way valves 16d, electromagnetic speed regulating valves 16e, second hydraulically controlled one-way valves 17, third hydraulically controlled one-way valves 18, fourth hydraulically controlled one-way valves 19, fifth hydraulically controlled one-way valves 20, working cylinders 21. Spare oil cylinder 22, first positio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a hydraulic lifting system of an attached tower crane. The hydraulic lifting system comprises a working oil cylinder and a spare oil cylinder, wherein the working oil cylinder and the spare oil cylinder are synchronously connected with a hydraulic system; the hydraulic system comprises a hydraulic loop, a control loop, a first bridge type rectification synchronizing loop, a second bridge type rectification synchronizing loop, a first locking loop connected with the working oil cylinder, and a second locking loop connected with the spare oil cylinder, wherein the hydraulic loop is respectively connected with the first bridge type rectification synchronizing loop and the second bridge type rectification synchronizing loop; the first bridge type rectification synchronizing loop is connected with the first locking loop; the second bridge type rectification synchronizing loop is connected with the second locking loop. When the lifting tonnage is lower, single cylinder is used for working; when the lifting tonnage is higher, two cylinders are adopted for synchronously working; when the working oil cylinder is broken down, the spare oil cylinder is adopted for work. The hydraulic lifting system improves the safety of the hydraulic system, solves the synchronism problem of two cylinders, saves the energy, and improves the service efficiency of the system.

Description

technical field [0001] The invention relates to the field of tower cranes, in particular to a hydraulic jacking system of an attached tower crane. Background technique [0002] With the rapid development of economic construction, my country's urbanization and industrialization continue to improve, which objectively leads to an increase in the demand for tower cranes. However, the safety of tower cranes is becoming more and more prominent. Once an accident occurs in the tower crane, it will definitely bring huge economic losses and casualties, which will have a major impact on society. The hydraulic jacking mechanism of the tower crane is one of the causes of major accidents to the tower crane. In the current market, most of the attached tower cranes use a single hydraulic cylinder jacking hydraulic system, and a balance valve is connected in series in the hydraulic system to prevent the crane from falling at a high speed, so as to ensure that the entire hydraulic jacking sy...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/62F15B11/028F15B11/22F15B1/02
Inventor 殷晨波王宝家夏勇葛中原吴福宝叶民镇
Owner NANJING TECH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products