CN212120844U - Unpowered fire coal sundries screening device - Google Patents

Abstract

The utility model discloses an unpowered fire coal debris screening plant, which comprises two bearing seats, two impellers and a filter screen, wherein the two bearing seats are symmetrically arranged at the two sides above a coal dropping port of a coal conveying belt; the lower back of the impeller is provided with a filter screen which is distributed in an inclined shape, a sundry box which is not covered is arranged at the lower edge of the filter screen, and a steel plate is clamped between the upper end edge of the right side surface of the sundry box and the lower edge end of the filter screen. The utility model discloses a top in impeller below and coal breakage mouth is provided with the filter screen that is the slope form and distributes to be provided with the storage tank in the low limit department of filter screen, on the coal passes through the leaf and takes turns to the filter screen, the impurity of cubic can slide into in the debris case, the buggy can pass through the blade clearance or see through the filter screen and fall into the coal breakage mouth, the staff only need regularly clear up the storage tank can, convenient to use, easy operation.

Description

Unpowered fire coal sundries screening device

The technical field is as follows:

the utility model relates to a get rid of device of stone, billet, gangue etc. that mix in the coal, in particular to unpowered coal-fired debris screening plant.

Background art:

a large amount of power coal is burned in a coal-fired power plant every year, and the power coal can be doped with stones and coal gangue in the process of mining tailings and corner mines, and even wood for supporting a roadway, woven bags for water plugging and other sundries; the stones and the coal gangue can reduce the calorific value of coal, reduce the output of a coal mill and increase the service power; wood, woven bags and the like can block the powder pipe and the coal feeder; therefore, a sundry removing machine is required to be arranged in the coal conveying system of the power plant to remove the sundries which influence the operation of the equipment; in the last two decades, the impurity removing machine is subjected to various evolution improvements, at present, the common impurity removing machine is more in variety, and the main flow is a multi-row and multi-bent-strip-shaped impeller type which is symmetrically arranged and rotates against coal flow; in order to prevent the coal flow from being blocked by the impurity remover, the arrangement distance of the bent strip-shaped impellers is large, usually about 50-100 mm, large stones, coal gangue and the like can be removed, small blocks cannot be removed, and therefore the effect is not good.

The condition that the coal flow is blocked by the impurity removing machine is observed, and two reasons for the large blocked coal flow are found, namely, a large block is loaded on the blade, the blade rotates against the coal flow, and the coal flow is quickly accumulated on the block, so that the coal moves to the coal-free side together with the block and falls down; secondly, small blocks are clamped between the blades, coal flow is accumulated on the blocks and the blades, coal moves to a non-coal side along with the blocks to fall down, and the coal blockage is more serious especially under the condition that the coal is wet.

The utility model has the following contents:

the utility model discloses the technical problem that will solve is: the shortcomings of the prior art are overcome, and the unpowered fire coal sundry screening device is provided, so that sundries in coal can be better removed, and the coal blockage situation is prevented.

The utility model discloses a technical scheme who solves technical problem and take is:

an unpowered fire coal impurity screening device comprises two bearing seats, impellers and a filter screen, wherein the two bearing seats are symmetrically arranged at two sides above a coal dropping port of a coal conveying belt, a fixed shaft is arranged between the two bearing seats, and the impellers are arranged on the fixed shaft; the lower rear of impeller is provided with the filter screen that is the slope form and distributes the low limit department of filter screen is provided with the debris case of uncovered form the steel sheet is equipped with to the centre gripping between debris case right side upper end border department and the filter screen low limit tip.

The impeller is at least four groups, each group of impeller is at least provided with four blades, and the blades uniformly surround the impeller shaft; the tail part of each blade is in spoon-shaped distribution with an inverted trapezoid cross section, each blade is in inverted trapezoid distribution, and the back surface of each blade is provided with a reinforcing rib.

The steel plate and the filter screen form an included angle of 90 degrees, the steel plate is distributed in an inclined shape, and the high end of the steel plate is fixedly connected with the low end of the filter screen and the right side edge of the upper port of the glove compartment respectively; the lower end of the steel plate extends to the coal dropping port.

The filter screen is 30 contained angles with ground the bottom surface of filter screen is provided with the connecting rod, the bottom of connecting rod sets up on the floor of coal breakage mouth both sides.

Each impeller is arranged on the fixed shaft through a shaft sleeve, the shaft sleeve is sleeved on the fixed shaft, and the shaft sleeve and the fixed shaft are locked and fixed together through bolts; and each impeller is respectively and rotatably connected with the corresponding shaft sleeve.

The filter screen is located the top of next belt coal breakage mouth, the glove compartment is located the left outside of next belt coal breakage mouth.

The utility model discloses an actively beneficial effect is:

1. the utility model realizes the separation of the block and the coal powder by the coal with the block gangue on the blades and the coal powder falling into the coal bunker through the gaps between the blades; when the blade rotates to lower rear portion, nevertheless on the filter screen is fallen to the cubic thing on the blade, be provided with the filter screen that is the slope form and distributes below the impeller and the top in coal bunker to be provided with the storage tank in the low limit department of filter screen, the impurity of cubic thing can slide in the storage tank, and the buggy can see through the filter screen and fall into in the coal bunker, realizes the separation of cubic thing rather than the buggy of adhesion. The worker only needs to clean the storage box regularly; through setting up the steel sheet in filter screen bottom border department and glove compartment right side upper end border department, the low side department of steel sheet stretches into in the coal breakage mouth, is favorable to the buggy through the filter screen to fall into coal breakage mouth department.

2. The utility model designs the end part of the blade into the spoon shape with the inverted trapezoid cross section, so that the coal powder can preferentially fall into the coal bunker in the rotation process of the impeller, and the block can slide to the tail part of the blade and fall off in the place far away from the coal flow; the card is also the fritter thing of blade simultaneously, and in the motion process, because vibrations can make the fritter thing drop from the blade, can be fine get rid of the cubic impurity. The blades can enable coal gangue carried on the blades or clamped between the blades to be more easily brought to the side far away from the coal flow and fall.

The impeller of the utility model is arranged on the fixed shaft through the shaft sleeve and is locked and fixed through the bolt; when the adjustable impeller is used, the distance between the impellers can be adjusted by moving the shaft sleeve on the fixed shaft left and right according to the diameter of the stone, so that the adjustable impeller is convenient to use and flexible to operate; the reinforcing ribs are arranged on the back of the blade, so that the service life of the blade is prolonged.

Description of the drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic structural view of the bottom of the blade of the present invention;

FIG. 4 is a cross-sectional view of the blade tip of the present invention;

fig. 5 is a side view of the impeller of the present invention.

The specific implementation mode is as follows:

the invention will be further explained and explained with reference to the drawings, in which:

referring to fig. 1-5, an unpowered fire coal sundries screening device comprises two bearing seats 1, impellers 3 and a filter screen 5, wherein the two bearing seats 1 are symmetrically arranged at two sides above a coal dropping port of a coal conveying belt, a fixed shaft 2 is arranged between the two bearing seats 1, and the impellers 3 are arranged on the fixed shaft 2; the filter screen 5 is arranged below and behind the impeller 3 and distributed in an inclined shape, the uncovered sundry box 7 is arranged at the lower edge of the filter screen 5, and the steel plate 9 is arranged between the upper end edge of the right side surface of the sundry box 7 and the lower edge of the filter screen 5 in a clamping mode.

The impellers 3 are at least four groups, each group of impellers 3 is provided with at least four blades, and the blades uniformly surround the central shaft of the impeller; the tail 3-1 of each blade is in inverted trapezoid-shaped spoon-shaped distribution with the cross section, each blade is in inverted trapezoid-shaped distribution (namely, one wider end is positioned at the spoon-shaped end part of each blade, the whole length of the whole blade is in inverted trapezoid-shaped distribution, and the tail end is bent into spoon-shaped, so that the tail 3-1 of each blade is in inverted trapezoid-shaped spoon-shaped distribution with the cross section), and the back of each blade is provided with a reinforcing rib 3-2.

The steel plate 9 and the filter screen 5 form an included angle of 90 degrees, the steel plate 9 is distributed in an inclined shape, and the high end of the steel plate 9 is fixedly connected with the low end of the filter screen 5 and the upper end of the right side surface of the sundries box 7 respectively; the lower end of the steel plate 9 extends to the coal dropping port and is distributed.

The filter screen 5 and the ground form an included angle of 30 degrees, the bottom parts of two sides of the filter screen 5 are provided with connecting rods 8, and the bottom parts of the connecting rods 8 are positioned on the floor slabs 6 at two sides of the coal dropping port.

Each impeller 3 is arranged on the fixed shaft 2 through a shaft sleeve 4, each shaft sleeve 4 is sleeved on the fixed shaft 2, and the shaft sleeve 4 and the fixed shaft 4 are locked and fixed together through a bolt 4-1; each impeller 3 is rotatably connected with a corresponding shaft sleeve 4.

The filter screen 5 is positioned above the coal dropping port of the next belt (below the head of the coal conveying belt), and the sundry box 7 is positioned outside the left side of the coal dropping port of the next belt.

The tips around the impeller in fig. 2 indicate the direction of rotation of the impeller; in fig. 2 a denotes the coal stream input.

In the above description, the steel plates are distributed in an inclined shape, and the lower section of the steel plates, namely the downward end, extends into the coal dropping port of the coal bunker, so that the pulverized coal penetrating through the filter screen can conveniently slide into the coal bunker; the back of the blade is provided with the reinforcing ribs which are arranged along the whole length of the back of the blade so as to improve the strength of the blade.

The working principle is as follows:

in the embodiment, four blades on each impeller are distributed in a cross shape, and are not stressed and are in a natural stop state in an idle load state; when coal flow falls from the upper right of the impeller and coal falls on the blades, analyzing the stress condition of the coal flow by five angles; considering the position of the blade vertically above the fixed shaft, coal cannot fall on the blade but can fall on the blade below the coal flow, and the blade can move along the coal flow direction under the impact of the coal flow and the gravity of the coal; when the blade moves to the direction deviated to 30 degrees of coal flow, the spoon-shaped tail end of the blade is basically vertical to the direction of the coal flow, coal cannot fall onto the blade, and the gravity of the blade and the coal flow on the lower blade impact and move downwards; when the blade moves to the position below the coal flow and in the horizontal position, the blade is extended to the longest length and is stressed to the greatest extent, a large amount of coal flow impacts the blade, and coal powder is accumulated on the blade and the block and moves downwards quickly; the coal dust accumulated on the blades and the blocks falls from gaps among the blades and the tail parts of the blades in a row along with the downward inclination of the blades, and the blocks can move downwards along the blades; when the blades move to a position vertical to the large shaft below the coal flow, the coal powder basically falls off, the blocks also move to the tail ends of the spoon-shaped blades and can hook the blocks, the blocks continue to move backwards due to inertia, and when the impeller rotates to the tail of the blades and is vertically downward, the blocks fall off after being subjected to the action of gravity and not staying on the blades; the blade continues to turn to and keeps away from the coal flow direction, during the horizontality, press from both sides the fritter object between the blade, receive the coal flow to drop the impact to the blade, vibrations, also can not stay on, can only drop to the filter screen of slope form, the buggy collision of being stained with on the cubic drops, on falling on the steel sheet through the filter screen, the steel sheet is the slope form, and the tip of steel sheet falls into down in the coal breakage mouth, debris are detached and in the sliding storage tank, the staff regularly clear up the storage tank can.

Claims (6)

1. The utility model provides a coal fired debris screening plant that does not have power, includes bearing frame (1), impeller (3) and filter screen (5), its characterized in that: the two bearing blocks (1) are symmetrically arranged at two sides above a coal dropping port of the coal conveying belt, a fixed shaft (2) is arranged between the two bearing blocks (1), and an impeller (3) is arranged on the fixed shaft (2); the lower rear of impeller (3) is provided with filter screen (5) that are the slope form and distribute be provided with uncovered form glove compartment (7) in the low limit department of filter screen (5) be equipped with steel sheet (9) between glove compartment (7) right flank upper end border department and filter screen (5) low limit tip.

2. The unpowered coal-fired sundry screening device according to claim 1, characterized in that: the number of the impellers (3) is at least four, at least four blades are arranged on each group of the impellers (3), and the blades uniformly surround the center shaft of the impeller; the tail part (3-1) of each blade is distributed in a spoon shape with an inverted trapezoid cross section, each blade is distributed in an inverted trapezoid shape, and a reinforcing rib (3-2) is arranged on the back surface of each blade.

3. The unpowered coal-fired sundry screening device according to claim 1, characterized in that: the steel plate (9) and the filter screen (5) form an included angle of 90 degrees, the steel plates (9) are distributed in an inclined manner, and the high end of the steel plate (9) is fixedly connected with the low end of the filter screen (5) and the upper end of the right side face of the sundry box (7) respectively; the lower end of the steel plate (9) extends to the coal dropping port and is distributed.

4. The unpowered coal-fired sundry screening device according to claim 1, characterized in that: filter screen (5) and ground are 30 contained angles the bottom of filter screen (5) both sides is provided with connecting rod (8), the bottom of connecting rod (8) is located floor (6) of coal breakage mouth both sides.

5. The unpowered coal-fired sundry screening device according to claim 1 or 2, characterized in that: each impeller (3) is arranged on the fixed shaft (2) through a shaft sleeve (4), the shaft sleeve (4) is sleeved on the fixed shaft (2), and the shaft sleeve (4) and the fixed shaft (2) are locked and fixed together through a bolt (4-1); each impeller (3) is rotatably connected with the corresponding shaft sleeve (4) respectively.

6. The unpowered coal burning sundry screening device according to claim 3, characterized in that: the filter screen (5) is positioned above the next belt coal dropping opening, and the sundry box (7) is positioned outside the left side of the next belt coal dropping opening.

Images