CN2285267Y

CN2285267Y - Contacltess check device with hydraulic load equalizing device

Info

Publication number: CN2285267Y
Application number: CN 96230375
Authority: CN
Inventors: 蒋卫粮; 潘敏献
Original assignee: SHANGHAI BRANCH OF COAL SCIENCE GENERAL INST
Current assignee: SHANGHAI BRANCH OF COAL SCIENCE GENERAL INST
Priority date: 1996-07-30
Filing date: 1996-07-30
Publication date: 1998-07-01
Anticipated expiration: 2006-07-30

Abstract

The utility model relates to a contactless backstop device with a hydraulic load equalizing device, and the utility model is important equipment used for preventing an upper conveying belt conveyor driven by multiple machines from reversing when the upper conveying belt conveyor stops. The utility model utilizes oil cylinders and pipelines arranged among the oil cylinders of backstop devices to connect the backstop devices together, and back stop torque on a conveyer can be homogeneously dispersed on each of the backstop devices. The utility model solves problems that when an upper conveying belt conveyor is driven by multiple machines, the backstop devices are not safe in use and the load of each of the backstop devices is not homogeneous; besides, the utility model enables the design and the model selection of the backstop devices to be economical and reasonable.

Description

Non-the connecing of band hydraulic load-equalizing device separated the formula holdback

The utility model belongs to the anti-reversing equipment of the upper conveying belt type conveyer of multimachine driving.

Contactless holdback is the important preventive device of upper conveying belt type conveyer; late nineteen eighties; China introduces the technology of German BORG-WARNE company; produce contactless holdback; these facility have advantages such as volume is little, in light weight, the check effect is big, are widely used on upper conveying belt type conveyer.This holdback is installed on the retarder high speed shaft of driver element, rigidly fix with anti-shaft seat, and utilize the characteristics of the angle of obliquity of eccentric voussoir and inside and outside circle less than its angle of internal friction, the fixation by the anti-shaft seat that links to each other with the outer ring guarantees reliable check.

Because high-power, upper conveying belt type conveyer with large inclination angle develops rapidly in recent years, the mode that has adopted multimachine to drive, holdback is correspondingly disperseed to be installed on the retarder high speed shaft of each driver element, because the difference of holdback torsional stiffness, holdback backlash, driving drum diameter etc., make certain holdback when non-return effect takes place, might bear major part even whole check moment, the destruction that causes holdback or reducer shaft, the grave accident that causes conveyer to reverse driving.Put very greatly although will be installed in the safe clearance of each holdback on the multimachine driving upper conveying belt type conveyer in the design, make that equipment volume increases, cost rises the generation that can't guarantee to stop this type of accident.

Problem at above-mentioned existence, the utility model provides a kind of hydraulic load-equalizing device of contactless holdback, by hydraulic ram and pipeline, each holdback is coupled together, the check moment of conveyer can be dispersed on each holdback, each holdback carries inequality, uses unsafe problem when solving the driving of upper conveying belt type conveyer multimachine.

The purpose of this utility model can realize by following proposal: 2～6 holdbacks are installed in respectively on the retarder high speed shaft of each driver element, the piston rod of each holdback outer ring and hydraulic ram is hinged, connect with pipeline between each oil cylinder, when holdback is had an effect, the outer ring that at first produces the holdback of non-return effect rotates an angle under the effect of eccentric voussoir, thereby promote the oil cylinder piston bar and move a segment distance to the oil cylinder afterbody, be pressed towards other oil cylinders by pipeline behind the oily pressurized in this oil cylinder, piston rod by each oil cylinder drives pivotally attached holdback outer ring rotation with it again, makes each holdback progressively enter non-return state.Because hydraulic oil can flow between each oil cylinder and reach equilibrium of pressure, therefore, check moment suffered on each holdback finally also reaches balance.

Compared with prior art, the technical solution of the utility model can make each holdback stand under load even, guarantees the safe check of conveyer, can also make the design selection economy of holdback, rationally.

Fig. 1 holdback structural representation

The hydraulic load-equalizing device scheme drawing of two holdbacks of Fig. 2 band

The hydraulic load-equalizing device scheme drawing of three holdbacks of Fig. 3 band

Below in conjunction with accompanying drawing, most preferred embodiment of the present utility model is described in detail.

As shown in Figure 1: holdback is installed on the retarder high speed shaft, rigidly fix with anti-shaft seat 11, during check, eccentric voussoir 14 contact and utilizes the characteristics of the angle of obliquity of eccentric voussoir 14 and inner ring 13, outer ring 15 less than its angle of internal friction with inner ring 13, outer ring 15 under the effect of torsion spring 16, by the fixation of the anti-shaft seat 11 that links to each other with outer ring 15, carry out check.

As shown in Figure 2, the outer ring of the piston rod of oil cylinder 4 and holdback 1 is hinged, the outer ring of the piston rod of oil cylinder 5 and holdback 2 is hinged, be communicated with by pipeline 10 between oil cylinder 4 and the oil cylinder 5, the afterbody of oil cylinder 4 is fixed on the conveyer frame with tailstock 7, and the afterbody of oil cylinder 5 is fixed on the conveyer frame with tailstock 8.

When the conveyer normal operation, the inner ring of holdback 1 and holdback 2 is done the anticlockwise direction rotation with the retarder high speed shaft, and eccentric voussoir also rotates with inner ring, and disengages with inside and outside circle under action of centrifugal force.When conveyer was shut down, eccentric voussoir contacted with inside and outside circle under the effect of torsion spring 16, and utilized the characteristics generation non-return effect of the angle of obliquity of eccentric voussoir and inside and outside circle less than its angle of internal friction.Set holdback 1 and be introduced into mode of operation, because the effect that the upper conveying belt type conveyer adhesive tape glides, retarder high speed shaft and inner ring reverse, drive θ angle of outer ring clickwise of holdback 1, thereby the piston rod that promotes oil cylinder 4 moves a segment distance Δ L to the oil cylinder afterbody, be pressed towards oil cylinder 5 by pipeline 10 behind the oily pressurized in the oil cylinder 4, piston rod by oil cylinder 5 drives θ angle of anticlockwise direction rotation, outer ring of pivotally attached holdback 2 with it, makes holdback 2 progressively enter the check mode of operation.Because hydraulic oil can flow between each oil cylinder and reaches equilibrium of pressure, therefore, check moment suffered on holdback 1 and the holdback 2 finally also reaches balance: if holdback 2 is introduced into mode of operation, situation is with above-mentioned the same.

As shown in Figure 3, the principle of work of three holdback combinations is the same with the principle of work of above-mentioned two holdbacks composition.Suppose holdback 1 ' be introduced into mode of operation, oil cylinder 4 ' in oil be pressed towards oil cylinder 5 ' and oil cylinder 6 in, drive oil cylinder 5 ' and the piston rod of oil cylinder 6 outwards move, make holdback 2 ' and holdback 3 ' progressively enter non-return state, until complete check.Because hydraulic oil can flow between each oil cylinder and reach equilibrium of pressure, therefore, suffered check moment finally also reaches balance on three holdbacks.

Claims

1, the band hydraulic load-equalizing device used of a kind of upper conveying belt type conveyer non-connects and separates the formula holdback and be made up of the holdback on 2 to 6 retarder high speed shafts that are installed in each driver element respectively, it is characterized in that, the piston rod of each holdback outer ring and hydraulic ram is hinged, connect with pipeline between each oil cylinder, the afterbody of each oil cylinder is fixed on the conveyer frame with tailstock.