CN205165142U

CN205165142U - Two commentaries on classics formula cylinder machines of screening coal

Info

Publication number: CN205165142U
Application number: CN201520813764.2U
Authority: CN
Inventors: 王宇光
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-10-21
Filing date: 2015-10-21
Publication date: 2016-04-20
Anticipated expiration: 2025-10-21

Abstract

The utility model provides a two commentaries on classics formula cylinder machines of screening coal for the coal -fired of thermal power plant is handled. Including the frame, a screen cloth section of thick bamboo is located rotor, actuating mechanism that a screen cloth section of thick bamboo is compriseed rotor shaft, wheel hub or spoke pole, rake head, the improvement of doing is: the rake head leaves the clearance at the outer circumference of wheel hub or spoke pole end fixed mounting between rake head and the screen cloth section of thick bamboo, front portion that the rake head is close to a screen cloth section of thick bamboo is for parallel or be close to the slab structure that is on a parallel with screen cloth section of thick bamboo axis, and front portion that the rake head is close to a screen cloth section of thick bamboo appears for T to the working face of coal, and there is the stock guide at the rake head rear portion. The utility model discloses an actively the effect is: fixed rake head is littleer than the frictional resistance that rotatable rake head produced, and overall machine stability is good in the work, and the claw does not have the fragmentation to the raw coal, reaches that screening efficiency is the highest, the wearing resistance is minimum and resist to glue the coal and block up the strongest utmost point of ability and can sieve the effect. Reduce idle energy loss and save energy consumption. Rotate relatively the rake head the machine of screening coal, improved complete machine job stabilization nature, a screen cloth section of thick bamboo and rotor work safe and reliable.

Description

A kind of dual-rotor drum coal sieving machine

Technical field

The utility model belongs to Work machine, is specifically related to the coal screen that the places such as thermal power plant use.

Background technology

Screen cloth is surrounded cylinder and make it rotate drum-type coal screening machine, be that Present Thermal Power factory uses one of more coal treatment facility.Owing to being transported to the high-moisture of the Domestic Coal of power plant, high ash content, many impurity, common rotary screen is caused can not normally to run because blocking up the reasons such as sieve.Before this, once proposed in the screen barrel of rotary screen, set up the rotor reversely rotated with screen barrel, by being hinged on multiple claw effect coal seams of rotor circumference, boosting coal sieves thoroughly, originates in domestic colm to tackle.Use practice through some power plant's more than ten years shows, although the more traditional rotary screen of its operating efficiency increases significantly, preferably for CFB power plant completes the work of screening coal.But through the further observation to its running, analysis, also have the following disadvantages.Drag head is hinged installation on wheel hub, forms extruding in rotation under centrifugal action to screen barrel and the coal seam between drag head and screen barrel, and comparatively greatly, idle wearing and tearing are more obvious for resistance cylinder being rotated be subject to.Screening efficiency and the sticky coal blocking ability of opposing still have to be hoisted.

Utility model content

The purpose of this utility model is to provide a kind of dual-rotor drum coal sieving machine, for the fire coal process of thermal power plant, overcomes existing this kind of coal screen above shortcomings.

Coal screen of the present utility model comprises frame, cylindrical screen cylinder on installation frame, be positioned at the rotor of screen barrel, what be made up of motor, reductor, driving member makes screen barrel and the mutual counter-rotational driving mechanism of rotor, rotor wherein comprises the armature spindle be positioned on screen barrel axis, be fixed on the wheel hub on armature spindle or be distributed in the spoke bar (raking arm) on armature spindle, be arranged on the drag head of wheel hub or each spoke bar excircle end; The improvement done is: described drag head, in the excircle end fixed installation of wheel hub or spoke bar, leaves gap between drag head and screen barrel, drag head near the front portion of screen barrel for being parallel or nearly parallel to the slab structure of screen barrel axis.It is more than basic technical scheme of the present utility model.

Promote the better effects of coal-fired sieve thoroughly and drag head had to flow down the function of roam all around the would to guide at the axial coal of screen barrel for playing drag head, of the present utility model improving further is, drag head is T-shaped near the front portion of screen barrel to the acting surface of coal, have the stock guide impelling coal to screen barrel output flow at the drag head rear portion of rotor turns direction of advance side, the side that stock guide is connected with drag head tilts to screen barrel Way out.

For improving the action effect that drag head impels coal thoroughly to sieve, cross-peen (with the screen barrel surface parallel portion) width in screen barrel radial direction in drag head T-shaped part is less than the average thickness in coal seam in screen barrel.Drag head working face and screen barrel are 35-45o angle.

Good effect of the present utility model is: drag head is at the hard-wired fixing drag head of excircle end of wheel hub or spoke bar, less than the frictional resistance of the rotatable drag head generation with rotating shaft installation in the past, in work, complete machine stability is good, claw is to raw coal without fragmentation, and reaching the pole that screening efficiency is the highest, wearing resistance is minimum and the sticky coal blocking ability of opposing is the strongest can screening effect.Reduce quadergy loss to save energy.Relatively rotate the coal screen of drag head, improve the stability of complete machine work, screen barrel and working rotor safe and reliable, Maintenance and Repair workload is few.

Accompanying drawing explanation

Fig. 1 is the radial cross-section of the utility model screen barrel and rotor combination.

Fig. 2 is claw and screen barrel location diagram in the utility model.

Fig. 3 is claw top view.

Fig. 4 is drag head A-A sectional view.

Fig. 5 is drag head B-B sectional view.

Detailed description of the invention

Coal screen of the present utility model comprises frame, the cylindrical screen cylinder on installation frame, is supported in frame, is positioned at the rotor of screen barrel, makes screen barrel and the rotor counter-rotational driving mechanism be made up of motor, reductor, driving member mutually.

Consult Fig. 1, Fig. 2, rotor wherein comprises the armature spindle 2 be positioned on screen barrel 1 axis, is distributed in the spoke bar (raking arm) 3 on armature spindle, is arranged on the drag head 4 of each spoke bar radial circumference end.The circumferential end fixed installation that described drag head 4 rotates at spoke bar 3, leaves gap between drag head 4 and screen barrel 1, drag head 4 near the front portion of screen barrel 1 for being parallel or nearly parallel to the slab structure of screen barrel axis.The action plane of drag head 4 pairs of coals and screen barrel are 35-45o angle.

Consult Fig. 3, Fig. 4, drag head 4 is projected as T-shaped near the front portion of screen barrel on the axial cross section of screen barrel.Cross-peen (with the screen barrel surface parallel portion) width in screen barrel radial direction in drag head T-shaped part is less than the average thickness in coal seam in screen barrel.

Consult Fig. 1, Fig. 2, Fig. 5, the stock guide 5 impelling coal to screen barrel output flow is had at the rear portion of rotor turns direction of advance side drag head 4, the side that stock guide 5 is connected with drag head 4 tilts to screen barrel 1 coal outlet direction, and angle of inclination is be 40-50o angle with screen barrel axis.

Claims

1. a dual-rotor drum coal sieving machine, comprise frame, cylindrical screen cylinder on installation frame, be positioned at the rotor of screen barrel, what be made up of motor, reductor, driving member makes screen barrel and the mutual counter-rotational driving mechanism of rotor, rotor wherein comprises the armature spindle be positioned on screen barrel axis, is fixed on the wheel hub on armature spindle or is distributed in the spoke bar on armature spindle, is arranged on the drag head of wheel hub or each spoke bar excircle end; It is characterized in that: described drag head, in the excircle end fixed installation of wheel hub or spoke bar, leaves gap between drag head and screen barrel, drag head near the front portion of screen barrel for being parallel or nearly parallel to the slab structure of screen barrel axis.

2. a kind of dual-rotor drum coal sieving machine according to claim 1, it is characterized in that: drag head is T-shaped near the front portion of screen barrel to the acting surface of coal, have the stock guide impelling coal to screen barrel output flow at the drag head rear portion of rotor turns direction of advance side, the side that stock guide is connected with drag head tilts to screen barrel Way out.

3. a kind of dual-rotor drum coal sieving machine according to claim 2, is characterized in that: the cross-peen in drag head T-shaped part is less than the average thickness in coal seam in screen barrel at the width of screen barrel radial direction, and drag head working face and screen barrel are 35-45o angle.