CN105537104A

CN105537104A - Coupling type comb type coal screening machine

Info

Publication number: CN105537104A
Application number: CN201610030223.1A
Authority: CN
Inventors: 马奎山
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-01-18
Filing date: 2016-01-18
Publication date: 2016-05-04
Anticipated expiration: 2036-01-18
Also published as: CN105537104B

Abstract

Disclosed is a coupling type comb type coal screening machine. A screen cloth of the coal screening machine is composed of a plurality of screen discs and a plurality of screen disc shafts; a set of screen discs are assembled on each screen disc shaft, and the screen discs on the same screen disc shaft are equidistantly and perpendicularly fixed to the corresponding screen disc shaft; the screen disc shafts are mounted on a rack in a vertical inclined face in parallel, and the screen discs on one screen disc shaft in adjacent screen disc shafts stretch into the position between adjacent screen discs on the other screen disc shaft; a screen cloth drive mechanism comprises a drive motor, a speed reducer, cranks, driving connecting rods, driven connecting rods and screen disc shaft rocking rods with the equal length; and the driving motor and the speed reducer are mounted on the rack, the cranks are fixed to an output shaft of the speed reducer, one ends of the driving connecting rods are connected with the cranks, the driven connecting rods are hinged to the driving connecting rods, and the screen disc shaft rocking rods are fixed to the screen disc shafts and hinged to the driven connecting rods in parallel. The coupling type comb type coal screening machine has the beneficial effects that the screen discs have the positive and negative coupling repeated effect on to-be-screened materials entering screen disc gaps, and self-blocking and self-clamping can be prevented; and the experiment shows that weeds, plastic bags and rag are mixed in coal, and under the serious viscous state of the coal, the screen cloth is still not blocked.

Description

Manifold type comb coal screen

Technical field

The invention belongs to Work machine, be specifically related to the screen subset that thermal power plant etc. uses with coal yard.

Background technology

In the past, large-scale, the relatively large using coal enterprise such as thermal power plant, the screen extension set used had swing, comb-tooth-type, roller shaft type.Above-mentioned screening machine, when sieving non-colm (ash content, moisture, impurity do not exceed standard), can meet production requirement.But in China, the domestic raw coal of the many uses of enterprise of large-scale use coal.The irrefragable fact is that domestic raw coal ubiquity ash content is many, water content is high, and is mixed with stone, wooden unit, metal derby, fabric etc.This kind of ature of coal gives the process before using, and particularly in the first screening of inclusion granule size difference large (from bulk to powder), brings many difficult problems.The colm using existing sieving machine to sieve most enterprise to use, the stifled sieve of sticky coal is in the field of business to be accustomed to, and rare have sieve not block up.Screen blocking disadvantage is very serious.Making to screen coal, link production efficiency is low, power consumption is many, and equipment failure rate is high, and coal screen blocking, must cause duff and enter coal breaker in a large number, threaten the safe operation of coal breaker.Time serious, by system closing.

Summary of the invention

The object of this invention is to provide a kind of manifold type comb coal screen, for the screening to coal, improve screening efficiency, overcome the moisture height that existing coal screen uses in a large number in the current China of screening, the colm above shortcomings that ash content is large, impurity is many.

Coal screen of the present invention comprises frame, screen cloth, screen cloth surrounding baffle, screen cloth driving mechanism, screen cloth is wherein made up of multiple screen tray and several screen tray axle, every root screen tray axle assembles one group of screen tray, and the screen tray on same screen tray axle is equidistant, be vertically fixed on screen tray axle.Described screen tray axle is parallel to each other and is arranged in frame in a vertical inclined plane, and the screen tray on a screen tray axle in adjacent screen tray axle stretches between the adjacent screen tray on another root screen tray axle; Described screen cloth surrounding baffle is at least located at screen cloth both sides, described screen cloth driving mechanism comprises rack-mounted drive motors, reductor, be fixed on the crank on speed reducer output shaft or wheel, the drive connecting rod of one end connecting crank free end, one end be hinged on drive connecting rod free end follower link, be separately fixed at isometric on every root screen tray axle and the parallel screen tray axle rocking bar be hinged in follower link, the ratio of crank wherein and rocking bar length meets crank one week rocking bar within the scope of set angle back and forth.

For improving screening percentage further, the ratio of the crank in driving mechanism and rocking bar length meets crank one week rocking bar in about angle back and forth, described screen tray is the shape of disk disappearance about right angle portions, screen tray lack part position on same screen tray axle is identical, the part that each screen tray lacks swings on rear side of screen tray axle within the scope of semicircle, and the circumference of screen tray presses close to adjacent screen tray axle.

For making the coal on compass screen surface obtain larger coal flow path direction active force from screen tray circumference, after screen tray is installed, be positioned at the several ratchet of circumferentially distribution of upside.

For ease of assembling and maintenance, described crank, connecting rod are divided into two covers, and casing is stretched out at braking maneuver power output shaft two ends, often hold by shaft coupling connecting crank axle, two crank axles install crank respectively, and crank connects drive connecting rod; By rise from the odd positions screen tray axle of screen cloth either end be one group, even number screen tray axle is one group, the rocking bar of two groups of screen tray axles divides and is located at screen cloth both sides, is connected respectively with the follower link of respective side, two suite handles, connecting rod drive two groups of screen tray axles in the same way, synchronous axial system.

Operation principle of the present invention is: during screening operation, and screen cloth axle group is with same frequency, the upper and lower rotation of identical spinning movement.Enter the raw coal of coal screen, rush at highest order axle group with certain speed, to enter after tooth screen tray under fixed fingers coordinates, sieved and push coal on sieve to the way of escape.Every coal entering into often forward and backward two between centers, under every two adjacent teeth screen traies " positive and negative coupling repeatedly " effect, through coupling part screening, and pushes outlet to by coal on the sieve on coupling part.This through coupling part screening, because of in the coupling of adjacent teeth screen tray.Two adjacent teeth screen tray must balance coal between two tooth screen traies and foreign material active force, causes thing, disk detachment, facilitates coal under gravity, and Low ESR falls.

Good effect of the present invention is: screen tray that is synchronous, rotating in same direction wherein has " positive and negative coupling repeatedly " unique effect to the material to be sieved entered in screen tray gap, can prevent coupling locked, occurs from the stifled phenomenon from card.Adopt circular but lack the screen tray of a right angle portions and lack part is located at limited position, compass screen surface can be obtained and alternately occur lacking screen tray and without coupling unit, reducing compass screen surface with the saturating coal resistance of lower part with lower part.Experiment use shows, reach under serious viscous state appears in ature of coal even if ature of coal is mixed with the foreign material such as weeds, polybag, rag, straw rope and a large amount of ash content and water content, screen cloth is still not blocked.Eliminate the chronic illness that coal screen cannot be treated in decades, its smooth and easy sieve function, improves operating efficiency; significantly reduce the power consumption of coal screen; coal screen fault is few, long service life, and the normal operation of protection coal pulverizer, has potential economic worth to whole coal handling system.

Accompanying drawing explanation

Fig. 1 is screen cloth top view.

Fig. 2 is screen tray location diagram.

Fig. 3 is driving mechanism front view.

Fig. 4 is driving mechanism top view.

Detailed description of the invention

Consult Fig. 1, Fig. 2, coal screen of the present invention comprises frame, screen cloth, screen cloth surrounding baffle, screen cloth driving mechanism, screen cloth is wherein made up of the circular screen tray 1 of longitudinal arrangement, several screen tray axles 2 of installing one group of screen tray, described screen tray 1 is the shape of disk disappearance about right angle portions 3, and what be in upside in the rear position of screen tray installation has circumferentially cut several ratchet 4.One group of screen tray 1 on same screen tray axle is equidistant, be vertically fixed on screen tray axle 2, screen tray lack part 3 position on same screen tray axle is identical, screen tray axle 2 dips one by one to be parallel to each other and is arranged in frame from the feeding end of screen cloth, and the screen tray on a screen tray axle in adjacent screen tray axle stretches between the adjacent screen tray on another root screen tray axle; The circumference of screen tray presses close to adjacent screen tray axle.The at least edge-on enclosing of described screen cloth surrounding baffle lives screen cloth both sides, screen cloth driving mechanism comprises rack-mounted drive motors 5, reductor 6, two crank axles 7 at speed reducer output shaft two ends are connected by shaft coupling, be arranged on two cranks 8 on two crank axles respectively, two drive connecting rod 9 of one end connecting crank free end, one end is hinged on two groups of follower link 10 of drive connecting rod free end, be separately fixed at the screen tray axle group of odd positions from screen cloth one end and two groups of screen tray axle rocking bars 11 of even number screen tray axle group screen tray axle head of screen cloth both sides, often organize screen tray axle rocking bar 11 isometric and be parallelly connected in follower link group 10, crank 8 meets crank with the length ratio relation of rocking bar 11 and circles, rocking bar is reciprocal in an angle.Two suite handles, connecting rod drive two groups of screen tray axles in the same way, synchronous reciprocating rotation in about angle.

Claims

1. manifold type comb coal screen, comprise frame, screen cloth, screen cloth surrounding baffle, screen cloth driving mechanism, it is characterized in that: described screen cloth is made up of multiple screen tray and several screen tray axle, every root screen tray axle assembles one group of screen tray, the screen tray on same screen tray axle is equidistant, be vertically fixed on screen tray axle; Described screen tray axle is parallel to each other and is arranged in frame in a vertical inclined plane, and the screen tray on a screen tray axle in adjacent screen tray axle stretches between the adjacent screen tray on another root screen tray axle; Described screen cloth surrounding baffle is at least located at screen cloth both sides, described screen cloth driving mechanism comprises rack-mounted drive motors, reductor, be fixed on the crank on speed reducer output shaft or wheel, one end connecting crank free end or the drive connecting rod near wheel week, one end is hinged on the follower link of drive connecting rod free end, is separately fixed at isometric on every root screen tray axle and the parallel screen tray axle rocking bar be hinged in follower link; The ratio of crank wherein and rocking bar length meets crank one week rocking bar within the scope of set angle back and forth.

2. manifold type comb coal screen according to claim 1, it is characterized in that: the ratio of the crank in driving mechanism and rocking bar length meets crank one week rocking bar in about angle back and forth, described screen tray is the shape of disk disappearance about right angle portions, screen tray lack part position on same screen tray axle is identical, the part that each screen tray lacks swings on rear side of screen tray axle within the scope of semicircle, and the circumference of screen tray presses close to adjacent screen tray axle.

3. manifold type comb coal screen according to claim 1 and 2, is characterized in that:, after screen tray is installed, be positioned at the several ratchet of circumferentially distribution of upside.

4. manifold type comb coal screen according to claim 1, it is characterized in that: described crank, connecting rod are divided into two covers, casing is stretched out at braking maneuver power output shaft two ends, often holds by shaft coupling connecting crank axle, two crank axles install crank respectively, and crank connects drive connecting rod; By rise from the odd positions screen tray axle of screen cloth either end be one group, even number screen tray axle is one group, the rocking bar of two groups of screen tray axles divides and is located at screen cloth both sides, is connected respectively with the follower link of respective side, two suite handles, connecting rod drive two groups of screen tray axles in the same way, synchronous axial system.