AU2007202586B2

AU2007202586B2 - Passive hydraulic control deviation-correcting linkage machine

Info

Publication number: AU2007202586B2
Application number: AU2007202586A
Authority: AU
Inventors: Gang Lin
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-06
Filing date: 2007-06-06
Publication date: 2012-07-05
Anticipated expiration: 2027-06-06
Also published as: AU2007202586A1

Abstract

The Passive Hydraulic Control Deviation-Correcting Linkage Machine, which can prevent and correct deviation of belt on belt conveyors, is composed of Hydraulic Control Detecting and Driving subsystem and Deviation-Correcting Linkage subsystem. The Hydraulic Control Detecting and Driving subsystem is composed of detecting-driving wheels, oil pumps, oil cylinder, program control station, temperature and level meter, which are connected by oil pipes. The Deviation Correcting Linkage subsystem consists of several individual rollers, roller brackets, universal joints, arm bars, connecting rods, pin shafts and framework. The combination of Hydraulic Control Detecting-Driving subsystem and Deviation-Correcting Linkage subsystem determines the following working procedure. When the running belt deviates from the middle operation position, the corresponding Detecting-Driving Wheel contacts with the belt and is driven by it as well. Then the revolving wheel drives Oil Pump outputting oil to the Program Control Station. The logical compact valves of Program Control Station instruct the piston rod of cylinder pushing or pulling. The action of Deviation-Correcting Linkage driven by the piston rod result in every rollers deflecting in the same direction synchronously. Thanks to the deviation of rollers, an angle is generated between line speed direction of rotating rollers and that of the running belt. The transverse friction of rollers and belt, due to the angle, drives the belt running back to the middle operation position. The Passive Hydraulic Control Linkage Deviation-Correcting Machine has following distinctive features. 1. No electric power needed 2. Automatic work under hydraulic principle 3. Reliable, robust and no maintenance needed 4. Linkage rectifying deviation synchronously 5. Automatic detecting and drive 6. Independent self-adaptive system

Description

EDITORIAL NOTE There are Four Pages of Description COMPLETE SPECIFICATION PASSIVE HYDRAULIC CONTROL DEVIATION-CORRECTING LINKAGE MACHINE This invention is designed for correcting deviation of running belt on belt conveyor. Nowadays, the mainstream deviation-correcting machines for all kinds of belt conveyors are center-adjusting roller, forward-tilt roller and electrohydraulic deviation-correcting device. But all the devices mentioned above have their own disadvantages. Center-adjusting rollers are not sensitive to belt deviation and react slowly. They can not self adjust their deflection angle properly according to the deviation of belt in order to generate proper deviation-correcting force and correct belt back to the middle position. Whether belt deviates or not, forward-tilt rollers always generate axial force which increases the resistance, which means power consumption, for running belt conveyor. Since the load has a direct proportion with the resistance, the power consumption will increase as soon as load increases. Especially, it increases the full load startup resistance dramatically. Since Electrohydraulic deviation-correcting device needs electric power and is sensitive to the working environment, it is not robust in the field and the deviation-correcting effect is not satisfied. In order to overcome disadvantages of current technologies, the Passive Hydraulic Control Deviation-Correcting Linkage Machine which doesn't need electric power and integrates hydraulic detecting and driving system with Deviation-Correcting Linkage system is proudly presented. The invention is composed of two subsystems. One is the Hydraulic Control Detecting-Driving subsystem which is designed for detecting deviation of belt and generating power of driving Deviation-Correcting Linkage subsystem as well. The other is Deviation-Correcting Linkage subsystem which operates belt conveyor directly to correct belt deviation. The Hydraulic Control Detecting-Driving subsystem concerned in this invention consists of two Detecting-Driving Wheels, two Oil Pumps, one Program Control Station, one Oil Cylinder, one Temperature and Level Meter, which are all connected by oil pipes. The Detecting-Driving Wheels are between two groups of roller brackets as well as on the two sides of the belt to detect whether the belt runs in the middle position of the belt conveyor. The Detecting-Driving Wheels are mounted on the shaft of Oil Pumps. When the running belt deviates from the middle position of the belt conveyor and contacts with the flange of Detecting-Driving Wheel, the Oil Pump driven by the connected Detecting-Driving Wheels begins to provide power for hydraulic system. The Oil Cylinder is on the same plane with the framework of Deviation-Correcting Linkage. The body of Oil Cylinder is hinged on the framework. The end of piston rod is hinged on the end of active connecting rod of Deviation-Correcting Linkage to drive Deviation-Correcting Linkage subsystem. The Program Control Station which is mounted on the framework of Deviation-Correcting Linkage is designed for controlling sequent actions of the piston rod. The Temperature and Level Meter, mounted on one side of Deviation-Correcting Linkage framework vertically should be higher than Oil Pumps in order to keep the input oil pressure of Oil Pumps to be positive as well as display temperature and level of oil. The typical connecting structure of the Hydraulic Control Detecting-Driving subsystem is described as follow. The left and right Oil Pumps' discharge port, suction port, leakage port (generally speaking, there is no leakage port on the single direction revolving gear pumps), the Oil Cylinder's pushing cavity oil port, pulling cavity oil port and the bottom oil port of the Temperature and Level Meter are all connected to the corresponding ports of logical valves of Program Control Station by oil pipes. The Deviation-Correcting Linkage subsystem concerned in this invention consists of several Rollers, Roller Brackets, Universal Joints, Arm Bars, Connecting Rods, Pin Shafts and Framework. The typical structure of the Deviation-Correcting Linkage for upper trough belt of belt conveyor is described as follow in detail. In the middle position, two rows of Roller Brackets of Deviation-Correcting Linkage are parallel. One row is group of Active Roller Brackets; the other is group of Passive Roller Brackets. Every Roller Bracket has its own revolving shaft. Each revolving shaft of tilted Roller Brackets, which are at each side of the middle Roller Bracket, is connected to the Universal Joint which makes the Active Arm Bars working in the same plane. Each Active Arm Bar is hinged uprightly on Active Connecting Rod respectively. One end of each Active Roller Bracket is hinged on the corresponding end of Passive Roller Bracket by the Passive Connecting Rod. The end of piston rod of Oil Cylinder is hinged on the Active Arm Bar of one of Active Roller Brackets or the upright extended rod of the Active Connecting Rod. So far, each rollers of the Deviation-Correcting Linkage can deflect in the same direction synchronically according to the pushing or pulling action of piston rod. Universal Joints are needed in the Passive Hydraulic Control Deviation-Correcting Linkage Machine for upper trough rollers and V type rollers of belt conveyor. Universal Joints are not needed in the Passive Hydraulic Control Deviation-Correcting Linkage Machine for parallel rollers of belt conveyor. In the Passive Hydraulic Control Deviation-Correcting Linkage Machine for parallel rollers of belt conveyor, the end of piston rod is hinged on the end of roller bracket directly instead of Active Arm Bars and Active Connecting Rods. More groups of passive roller brackets can be added in by connecting more passive connecting rods of passive roller brackets. The combination of Hydraulic Control Detecting-Driving subsystem and Deviation-Correcting Linkage subsystem determines the following working procedure. When the running belt deviates from the middle operation position, the corresponding Detecting-Driving Wheel contacts with the belt and is driven by it as well. Then the revolving wheel drives Oil Pump outputting oil to the Program Control Station. The logical compact valves of Program Control Station instruct the piston rod of cylinder pushing or pulling. The action of Deviation-Correcting Linkage driven by the piston rod result in every rollers deflecting in the same direction synchronously. Thanks to the deviation of rollers, an angle is generated between line speed direction of rotating rollers and that of the running belt. The transverse friction of rollers and belt, due to the angle, drives the belt running back to the middle operation position. The Deviation-Correcting Linkage can be driven by mechanical driver, electric driver, Electrohydraulic driver, Pneumatic driver or any kind of other power source drivers and be part of corresponding power source deviation-correcting machine. REFERRING NOW TO THE DRAWINGS: Figure 1 is the three dimensions drawing of the passive hydraulic control Deviation-Correcting Linkage machine for the upper belt of trough belt conveyor. Figure 2 is the looking-up view of the passive hydraulic control Deviation-Correcting Linkage machine for the upper belt of trough belt conveyor. Figure 3 the oil connection graph of Hydraulic Control Detecting-Driving system (oil pump with leakage port) HERE IS THE LIST OF ALL PARTS IN FIGURES: (1) Detecting-Driving Wheel (2) Oil Pump (3) Program Control Station (4) Oil Cylinder (5) Active Arm Bar (6) Active Connecting Rod (7) Universal Joint (8) Active Roller Bracket (9) Passive Connecting Rod (10) Passive Roller Bracket (11) Roller (12) Belt (13) Temperature and Level Meter (14) Framework The mounting and working procedure will be explained further under the help of drawings. The Belt(12) is put on the Passive Hydraulic Control Deviation-Correcting Linkage Machine. The Detecting-Driving Wheels(1) and Oil Pumps(2) are between rollers of Active Roller Bracket(8) and rollers of Passive Roller Brackets(10) and also on the two sides of Belt(1). The Temperature and Level Meter(13) is higher than Oil Pump(2) and mounted on the Framework(14). The Program Control Station is mounted on the Framework(14). The body of Oil Cylinder(4) is hinged on the Framework(14). The end of piston rod is hinged on the end of Active Arm Bar(5).

Each oil port of Oil Pump, Oil Cylinder, Temperature and Level Meter is connected to the Program Control Station(3). When the running belt(12) deviates from the middle operation position, the belt contacts with corresponding Detecting-Driving Wheel(1) and drives Detecting-Driving Wheel(1) revolving as well. Then the revolving Detecting-Driving Wheel(1) drives the Oil Pump(2) outputting oil to the Program Control Station(3). The logical compact valves of Program Control Station(3) control the piston rod of Oil Cylinder(4) pushing or pulling according to the pre-set sequence. The action of Oil Cylinder(4) drives the group of Active Arm Bars directly. The middle Active Arm Bar drives the shaft of the middle Active Roller Bracket(8) revolving. By Universal Joints, the two sides Active Arm Bars drive the shafts of the tilted Active Roller Brackets(8) revolving as well. The Active Roller Bracket(8) drives the corresponding Passive Roller Bracket(10) by Passive Connecting Rod(9) which is hinged on the end of Active Arm Bar and corresponding end of Passive Arm Bar. Then each roller on the Active Roller Brackets(8) and Passive Roller Brackets(10) deflects an angular in the same direction synchronically base on its own shaft. Thanks to the deflection of Rollers(11), an angle is generated between line speed direction of revolving Rollers(11) and that of the running Belt(12). The transverse friction of Rollers(11) and Belt(12), due to the angle, drives the belt running back to the middle of two Detecting-Driving Wheels(1), namely middle operation position.