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Combination type pulley for arm support of portal hoist, maintaining and installing technique thereof

An installation process and combined technology, which is applied to portable hoisting devices, hoisting devices, mechanical equipment, etc., can solve the problems of long downtime, waste, and poor wear resistance of pulley rope groove rings, etc., and improve production efficiency , improve the utilization rate, easy maintenance effect

Inactive Publication Date: 2008-07-09
NO 4 WATER TERMINAL CORP TIANJIN PORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of pulley has the advantage of light weight, the wear resistance of the pulley groove ring is poor, so when the pulley groove ring is worn out, the whole pulley needs to be replaced, resulting in waste; Use a through shaft to string together the three parts of the elephant trunk, tie rod, and pulley. Therefore, replacing the pulley requires dismantling the boom system, which not only costs a lot of money, but also takes a long time for the door machine to be shut down, which affects production.

Method used

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  • Combination type pulley for arm support of portal hoist, maintaining and installing technique thereof
  • Combination type pulley for arm support of portal hoist, maintaining and installing technique thereof
  • Combination type pulley for arm support of portal hoist, maintaining and installing technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] see figure 1 , be shaped on six spoke plates 3 on the large hump pulley hub 4 of the door machine jib. In order to facilitate the replacement of the pulley groove ring 1, the outer end surface of each web is spliced ​​with a pulley groove ring 1 with a U-shaped groove 5 on the outer peripheral surface welded by two semi-circular splicing, see figure 2 , the pulley groove ring and each web are connected by welding, so that a new pulley groove ring can be replaced by cutting and welding. In order to increase the connection strength between the pulley groove ring and each spoke plate, welded reinforcing rib plates 2 are installed on both sides of the splice between the spoke plate and the pulley groove ring.

Embodiment 2

[0030] Another structure for splicing the pulley grooves is that through holes 6 are formed on the outer ends of each web, splints 7 are welded on both sides of the pulley grooves corresponding to each web, and splints are formed on the splints corresponding to the through holes on the webs. Through holes 8, fastening bolts 9 are installed in the through holes of the web plate and the splint plate. A connecting plate 10 and a fastening screw 11 are installed on the inner peripheral surface of the splicing part of the pulley groove ring, so that the purpose of replacing a new pulley groove ring can also be achieved through the disassembly and assembly of bolts and screws, such as image 3 and Figure 4 shown.

Embodiment 3

[0032] The combined pulley repair and installation process for the door crane jib has the following steps:

[0033] Welding maintenance installation process:

[0034] (1) Make a complete pulley groove, the inner circle of the pulley groove has welding grooves, and then cut the complete pulley groove into two half-ring pulley grooves;

[0035] (2) Use a gas welding gun to accurately cut the web along the inner circle of the damaged pulley groove, and cut off the damaged pulley groove from the web;

[0036] (3) Set the new half of the annular pulley groove ring on the spoke plate and fix it with electric spot welding, and then set the other half of the annular pulley groove ring on the spoke plate and fix the two half ring pulleys with a clamp. The groove rings are connected together, and the angle of the pulley groove ring is measured and adjusted with a measuring instrument so that it is perpendicular to the pulley shaft;

[0037] (4) Weld and fix the pulley groove ring on t...

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PUM

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Abstract

The invention provides the combined pulley for arm support of portal hoist and its maintenance. It is characterizes in that the pulley slot ring jointly welded by two semi-circle pulley slot rings is on the outside end face of the assistant boards of the hub, and the reinforcing rib is welded at the splicing place of the pulley slot ring and the assistant boards; or equip the connecting boards and the tightening bolts at the inside circumference of the splicing place, and the clamping board and the tightening bolts are welded at the two sides of the slot ring. The invention has simple structure and materials, which shortens the maintaining time and improves the working efficiency.

Description

technical field [0001] The invention relates to a guide pulley used on the arm frame system of a door crane for loading and unloading goods in ports and wharves, in particular to a combined pulley used for the arm frame of a door crane and its maintenance and installation process. Background technique [0002] The door crane is the main equipment for loading and unloading goods in ports and wharves. The guide pulleys on the arm frame system of the M10t-30m gantry crane produced by Shanghai Port Machinery Factory in the 1980s are fixed in the "serial shaft" connection form, and each guide pulley adopts the "groove cold-rolled welded pulley" structure . Although this kind of pulley has the advantage of light weight, the wear resistance of the pulley groove ring is poor, so when the pulley groove ring is worn out, the whole pulley needs to be replaced, resulting in waste; A through shaft is used to string together the three parts of the elephant trunk beam, pull rod and pulle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/50
Inventor 杨祥海杨宗玖贾洪汪宝陈炳福郭高勇王美林
Owner NO 4 WATER TERMINAL CORP TIANJIN PORT
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