CN114655637B - Boiler material feeding unit - Google Patents

Abstract

The invention discloses a boiler feeding device which comprises a rack, a belt conveyor and at least one iron removing mechanism, wherein the belt conveyor comprises a conveying motor, a driving roller, a driven roller, a belt and two belt tensioning mechanisms, the driving roller is rotatably arranged at the first end of the rack and is in driving connection with an output shaft of the conveying motor, the driven roller is rotatably arranged at the second end of the rack, the belt is arranged between the driving roller and the driven roller, and the two belt tensioning mechanisms are symmetrically arranged at the second end of the rack. The rotary stirring mechanism is arranged to stir the coal to enable iron impurities in the coal to be easily exposed, so that the iron impurities in the coal can be absorbed by the adsorption mechanism, and the iron removal effect can be effectively improved; the height of the beam can be adjusted in a self-adaptive manner, so that the turnover driving lever can automatically avoid obstacles in a coal seam, and the turnover driving lever is prevented from being rigidly blocked by the obstacles and being incapable of rotating, so that the turnover driving lever is prevented from being damaged or a motor is prevented from being damaged due to the fact that the turnover driving lever is stuck.

Description

Boiler material feeding unit

Technical Field

The invention relates to the field of material conveying devices, in particular to a boiler feeding device.

Background

The boiler is a thermal energy conversion device, which generates thermal energy by using coal as fuel through combustion or the like, or converts the thermal energy into mechanical energy through a steam power device, or converts the thermal energy into electric energy through a generator. The addition of fuel is required to ensure real-time, sufficient quantity, and is therefore usually fed by belt conveyor equipment. As the coal is easy to mix into iron impurities such as spike, bolt, shaft pin and the like in mining or processing, the iron impurities have the main harm to the coal supplied to the boiler, such as easy damage to slag removal equipment of the boiler, and jamming of parts such as gears and the like, and the shutdown fault is caused. Therefore, the boiler coal conveying line needs to pick up iron by means of workers or adopt special equipment to automatically remove iron. The existing iron removal scheme is that an electromagnet is usually erected on a conveying path, and when bulk coal passes through the electromagnet, iron impurities are sucked out to remove iron. When this solution has the following drawbacks: the iron impurities in the coal are not easy to be sucked out, and especially when the coal is thick, the iron impurities in the deep position are difficult to be effectively sucked out, so that the iron removal effect is poor, and the use requirement is difficult to meet. A more reliable solution is now needed.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a boiler feeding device aiming at the defects in the prior art.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a boiler feeding device comprises a frame, a belt conveyor arranged on the frame and at least one iron removing mechanism arranged on the frame,

the belt conveyor comprises a conveying motor, a driving roller which is rotatably arranged at the first end of the rack and is in driving connection with an output shaft of the conveying motor, a driven roller which is rotatably arranged at the second end of the rack, a belt arranged between the driving roller and the driven roller and two belt tensioning mechanisms which are symmetrically arranged at the second end of the rack;

the belt tensioning mechanism comprises a first mounting plate fixedly connected to the first end of the rack, a second mounting plate vertically connected to the first mounting plate, two slide rails fixedly connected to the upper end and the lower end of the first mounting plate, a sliding mounting block slidably arranged between the two slide rails, a driving nut fixedly connected to the sliding mounting block, and a tensioning screw rod, wherein the first end of the tensioning screw rod is in threaded connection with the second mounting plate, the second end of the tensioning screw rod is in threaded connection with the driving nut, and the upper end face and the lower end face of the sliding mounting block are provided with sliding chutes matched with the slide rails;

the sliding installation block is further provided with a bearing, an adjusting groove is formed in the first installation plate along the material conveying direction, and the end portion of a driven shaft connected to the driven roller penetrates through the adjusting groove to be inserted into the bearing in a matched mode.

Preferably, the slide mounting piece be close to the holding tank that the second end of confession tensioning lead screw stretched into is seted up to the one end of second mounting panel, drive nut sets up the port department of holding tank.

Preferably, arc-shaped clamping pieces are arranged on the inner walls of the two sides of the sliding groove, and clamping grooves for the arc-shaped clamping pieces to be clamped into are formed in the outer walls of the two sides of the sliding rail along the material conveying direction;

the first end and the second end of the arc-shaped clamping piece are fixedly connected with the inner wall of the sliding chute, and an arc-shaped bulge far away from the inner wall of the sliding chute is formed between the first end and the second end of the arc-shaped clamping piece;

the distance between the arc-shaped protrusion and the first end of the arc-shaped card is smaller than the distance between the arc-shaped protrusion and the second end of the arc-shaped card;

the arc protruding with form first rake between the first end of arc card, the arc protruding with form the second rake between the second end of arc card, the inclination of first rake is greater than the second rake.

Preferably, the iron removing mechanism comprises a mounting bracket, a rotary turning mechanism rotatably arranged on the mounting bracket, an adsorption mechanism arranged on the mounting bracket and above the rotary turning mechanism, and an auxiliary drum rotatably arranged on the rack and below the belt;

the adsorption mechanism is an electromagnet or a permanent magnet, the mounting bracket is arranged above the belt in a crossing manner, and the rotary turning mechanism can turn over the material of the belt and absorb iron impurities in the material through the adsorption mechanism.

Preferably, the auxiliary roller is arranged behind the mounting bracket along the feeding direction, and the cross section of the auxiliary roller is elliptical or cam-shaped.

Preferably, the rotary turning mechanism comprises a rotating shaft rotatably arranged on the mounting bracket, an iron removal motor for driving the rotating shaft to rotate, an iron removal roller fixedly sleeved on the rotating shaft, a plurality of mounting rings with adjustable intervals sleeved on the iron removal roller, and a turning lever fixedly connected to the mounting rings;

the outer wall of the iron removing roller is provided with a plurality of mounting threaded holes, and the mounting ring is connected with the mounting threaded holes through fixing screws;

the turning and shifting rod comprises a plurality of turning and shifting rods which are uniformly arranged on the periphery of the mounting ring at intervals, and the turning and shifting rods face the fire coal on the fire coal conveying device to rotate so as to turn and shift.

Preferably, the mounting bracket comprises two bases, two upright posts movably inserted into the insertion holes of the two bases respectively, and a cross beam connected between the two upright posts;

the adsorption mechanism is arranged on the cross beam, and two ends of the rotating shaft are rotatably connected to the two upright posts;

the bottom of stand with be connected with the extension spring between the bottom inner wall of jack, the stand can slide from top to bottom in the jack of base with the height of self-adaptation regulation the crossbeam.

Preferably, the upright post is contacted with the inner wall of the jack through two groups of roller groups which are arranged at intervals up and down and can be rotatably arranged on the outer wall of the upright post, each roller group comprises a first pulley block positioned above and a second pulley block positioned below, and each roller group comprises a plurality of pulleys which are arranged along the circumferential direction of the upright post and can be rotatably connected to the outer wall of the upright post;

the inner wall of the jack is connected with a limiting ring, and the limiting ring is located between the first pulley block and the second pulley block.

Preferably, the turnover rod is integrally in a hook shape and comprises an arc-shaped part connected with the periphery of the mounting ring, a column part connected with the tail end of the arc-shaped part and a magnetic inner cone connected with the column part.

Preferably, the turning over deflector rod further comprises an outer taper sleeve which is rotatably sleeved outside the magnetic inner cone and a reinforcing rib which is spirally and circularly arranged on the outer wall of the outer taper sleeve;

an annular mounting groove is formed in the outer wall of the cylindrical part, and a top column is arranged at the tail end of the magnetic inner cone;

the cover of establishing including outer taper sleeve is established outer column cover in the column body portion and with the cover that column cover is connected is established outer taper sleeve in the magnetism, be connected with rotatable setting on the inner wall of column cover and be in go-between in the annular mounting groove, the confession has been seted up on the top inner wall of taper cover the male overhead tank of overhead column cooperation, go-between and annular mounting groove pass through the arcwall face contact, overhead column and overhead tank pass through the arcwall face contact.

The invention has the beneficial effects that: the boiler feeding device can realize continuous and automatic feeding of the boiler, and the rotary stirring mechanism is arranged to stir the coal so as to expose iron impurities in the coal easily, so that the iron impurities in the coal can be absorbed by the adsorption mechanism, and the iron removal effect can be effectively improved;

in the mounting bracket, the height of the cross beam can be adjusted in a self-adaptive manner, so that the turnover rod can automatically avoid obstacles (such as overlarge iron impurities, gangue and the like) in a coal seam, and the turnover rod is prevented from being rigidly blocked by the obstacles and being incapable of rotating, so that the turnover rod is prevented from being damaged or a motor is damaged due to the fact that the turnover rod is clamped;

according to the invention, through the structural design of the turning rod and the matching of the mounting bracket structure capable of adaptively adjusting the height of the cross beam, the performance of the turning rod for adaptively crossing the obstacle can be improved; according to the invention, the outer taper sleeve at the tail end of the turning and shifting rod is rotatably sleeved outside the magnetic inner cone, and the outer taper sleeve can rotate around the magnetic inner cone due to the resistance of fire coal in the process of rotating the turning and shifting rod for working; then the functional structure that the upright post moves upwards is driven by the counterforce of the obstacle in the mounting bracket to the turnover driving lever, so that the turnover driving lever rises upwards and can finally smoothly pass over the obstacle.

According to the invention, the arrangement of the magnetic inner cone enables a certain amount of iron impurities to be adsorbed by the magnetic inner cone when the fire coal is turned over, and the adsorption effect of the magnetic inner cone is obviously smaller than that of the adsorption mechanism, so that when the turning over lever rotates to the highest point, the adsorbed iron impurities are adsorbed by the adsorption mechanism; thereby further improving the iron removal effect, in particular to the absorption of small iron particle impurities which are not easy to be absorbed directly by an absorption mechanism buried in the fire coal;

according to the invention, the outer wall of the outer taper sleeve is provided with the reinforcing ribs which are spirally arranged, so that the strength of the outer taper sleeve can be improved, more importantly, the spiral reinforcing ribs can rotate when being turned over by means of the rotation of the outer taper sleeve, so that the coal bed can be loosened and burned more favorably, the coal bed can be lifted, iron impurities in the coal bed can be separated from the coal, and the iron removal effect can be further improved;

the belt tensioning mechanism is arranged to realize tensioning, so that the conveying efficiency of the belt can be ensured; and the belt tensioning mechanism is convenient to operate and has a good tensioning effect.

Drawings

FIG. 1 is a schematic structural view of a boiler feed assembly of the present invention;

FIG. 2 is a schematic structural view of the belt tensioner mechanism of the present invention;

FIG. 3 is a schematic view of the belt tensioner mechanism of the present invention with portions of the assembly removed;

FIG. 4 is a schematic view of the structure of an arc card according to the present invention;

FIG. 5 is a schematic top view of an arc card of the present invention;

FIG. 6 is a schematic structural diagram of the iron removing mechanism of the present invention (the auxiliary roller is omitted);

fig. 7 is a front view of a state of the iron removing mechanism of the present invention (the supplementary drum is omitted);

FIG. 8 is an enlarged view taken at A of FIG. 7 in accordance with the present invention;

fig. 9 is a front view showing another state of the iron removing mechanism of the present invention (the supplementary drum is omitted);

FIG. 10 is an enlarged view of the invention at B of FIG. 10;

FIG. 11 is a schematic view of the construction of the mounting ring of the present invention;

FIG. 12 is a schematic view of the structure of the rotary flipping mechanism of the present invention cooperating with the auxiliary roller;

FIG. 13 is a schematic structural diagram of a toggle lever according to an embodiment of the present invention;

fig. 14 is a partial sectional structural schematic diagram of the toggle lever according to an embodiment of the present invention.

Description of reference numerals:

1, a frame;

2-a belt conveyor; 20-a conveyor motor; 21-a driving roller; 22-a driven drum; 23-a belt; 24-driving shaft; 25-a driven shaft;

3-a deironing mechanism;

31-mounting a bracket; 310-a base; 311, a column; 312-beam; 313-a receptacle; 314-a tension spring; 315-first pulley block; 316-second pulley block; 317-a pulley; 318-a stop collar;

32-rotating the flipping mechanism; 320-a rotating shaft; 321-iron removing motor; 322-iron removal roller; 323-mounting ring; 324-turning over the deflector rod; 325-mounting threaded holes; 326-fixing screws;

33-an adsorption mechanism;

3240-arc portion; 3241-column part; 3242-magnetic inner cone; 3243-external taper sleeve; 3244-reinforcing rib; 3245-annular mounting groove; 3246-top column; 32430-cylindrical sleeve; 32431-conical sleeve; 32432 — connecting ring; 32433 — top groove;

34-an auxiliary roller; 340-mounting block;

4-belt tensioning mechanism; 40-a first mounting plate; 41-a second mounting plate; 42-a slide rail; 43-a sliding mounting block; 44-a drive nut; 45-tensioning screw rod; 46-a chute; 47-a bearing; 48, an adjusting groove; 420-card slot; 430-accommodating grooves; 450-a spin cap; 460-arc cards; 461-first end of arc card; 462-a second end of the arc card; 463-arc projection; 464-a first inclined portion; 465-second inclined portion.

Detailed Description

The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or combinations thereof.

Example 1

As shown in fig. 1-5, the feeding device for the boiler of the present embodiment includes a frame 1, a belt 23 conveyor 2 disposed on the frame 1, and at least one iron removing mechanism 3 disposed on the frame 1,

the belt 23 conveyor 2 comprises a conveying motor 20, a driving roller 21 rotatably arranged at a first end of the frame 1 and in driving connection with an output shaft of the conveying motor 20, a driven roller 22 rotatably arranged at a second end of the frame 1, a belt 23 arranged between the driving roller 21 and the driven roller 22, and two belt tensioning mechanisms 4 symmetrically arranged at the second end of the frame 1.

The working principle of the invention is as follows: the conveying motor 20 drives the belt 23 to convey materials (fire coal), the iron removing mechanism 3 turns over the fire coal to expose iron impurities in the fire coal, and the iron impurities are absorbed through the adsorption mechanism 33, so that iron removal is realized. The adsorption mechanism 33 is an electromagnet or a permanent magnet, and adsorbs iron impurities by magnetic force. The iron impurities adsorbed on the adsorption mechanism 33 are cleaned after a certain period of use. The coal on the conveyor belt 23 is subjected to iron impurity removal through the iron removal mechanism 3 so as to prevent iron impurities from damaging boiler equipment.

After the transmission belt 23 works for a period of time, the transmission belt 23 can generate permanent deformation to loosen the belt, and the working capacity of belt transmission is influenced, so that a certain initial tension needs to be ensured by taking a tensioning measure. In the present invention, the belt tensioning mechanism 4 achieves tensioning of the belt 23 by adjusting the distance between the driving roller 21 and the driven roller 22 to ensure the conveying efficiency. In this embodiment, the driving roller 21 is rotatably disposed at the first end of the frame 1 through the driving shaft 24, and cannot move in the material conveying direction. The drive shaft 24 is drivingly connected to the conveyor motor 20. The two ends of the driven shaft 25 connected to the driven roller 22 are rotatably provided on the two belt tensioning mechanisms 4, respectively, and the belt tensioning mechanisms 4 can move the driven roller 22 in the transport direction, thereby increasing the distance between the driven roller 22 and the driving roller 21 to tension the belt 23.

Specifically, in this embodiment, referring to fig. 2 to 3, the belt tensioning mechanism 4 includes a first mounting plate 40 fixedly connected to a first end of the rack 1, a second mounting plate 41 vertically connected to the first mounting plate 40, two slide rails 42 fixedly connected to upper and lower ends of the first mounting plate 40, a sliding mounting block 43 slidably disposed between the two slide rails 42, a driving nut 44 fixedly connected to the sliding mounting block 43, and a tensioning screw 45 having a first end in threaded connection with the second mounting plate 41 and a second end in threaded connection with the driving nut 44, wherein upper and lower end surfaces of the sliding mounting block 43 are both provided with sliding grooves 46 matched with the slide rails 42; the second mounting plate 41 is provided with a threaded hole matched with the tension screw rod 45. The first end of the tensioning screw 45 is further connected with a rotating cap 450 to facilitate rotation of the tensioning screw 45.

The sliding installation block 43 is further provided with a bearing 47, an adjusting groove 48 is formed in the first installation plate 40 in the material conveying direction, and the end portion of the driven shaft 25 connected to the driven roller 22 penetrates through the adjusting groove 48 to be inserted into the bearing 47 in a matched mode. One end of the sliding mounting block 43 close to the second mounting plate 41 is provided with a receiving groove 430 for the second end of the tension screw 45 to extend into, and the driving nut 44 is arranged at the port of the receiving groove 430. The tension screw 45 is axially movable therein by providing the receiving groove 430.

The working principle of the belt tensioning mechanism 4 is as follows: when the belt 23 needs to be tensioned, the tensioning screw 45 is rotated, the sliding mounting block 43 slides on the sliding rail 42 towards the direction away from the second mounting plate 41 through the matching of the driving nut 44, so that the driven roller 22 is driven to move towards the direction away from the driving roller 21, and the belt 23 is tensioned.

Referring to fig. 4-5, in a preferred embodiment, the inner walls of the sliding groove 46 are provided with arc-shaped clamping pieces 460, and the outer walls of the sliding rail 42 are provided with clamping grooves 420 for clamping the arc-shaped clamping pieces 460 along the material conveying direction;

the first end 461 and the second end of the arc-shaped clamping piece are fixedly connected with the inner wall of the sliding groove 46, and an arc-shaped bulge 463 far away from the inner wall of the sliding groove 46 is formed between the first end 461 and the second end of the arc-shaped clamping piece;

the distance between the arc-shaped protrusion 463 and the first end 461 of the arc-shaped card is smaller than the distance between the arc-shaped protrusion 463 and the second end 462 of the arc-shaped card;

a first inclined portion 464 is formed between the arc protrusion 463 and the first end 461 of the arc card, a second inclined portion 465 is formed between the arc protrusion 463 and the second end 462 of the arc card, and the inclination angle of the first inclined portion 464 is larger than that of the second inclined portion 465. When the slide rail 42 is disposed in the slide groove 46, the arc locking piece 460 is locked into the locking groove 420, and through the design of the above structure of the arc locking piece 460, the arc protrusion 463 can generate elastic force toward the second inclined part 465 from the first inclined part 464 on the inner wall of the locking groove 420, so that a pretensioning force toward the direction away from the driving roller 21 can be generated on the driven roller 22, a better tensioning effect can be achieved, and the driven roller 22 is prevented from moving toward the driving roller 21.

Example 2

Referring to fig. 6-10, as a further improvement on embodiment 1, in this embodiment, the mounting bracket 31 includes two bases 310, two upright posts 311 movably inserted into the insertion holes of the two bases 310, and a cross beam 312 connected between the two upright posts 311;

the adsorption mechanism 33 is arranged on the cross beam 312, and two ends of the rotating shaft 320 are rotatably connected to the two upright columns 311;

a tension spring is connected between the bottom of the upright post and the inner wall of the bottom of the insertion hole, and the upright post 311 can slide up and down in the insertion hole 313 of the base 310 to adjust the height of the cross beam 312 in a self-adaptive manner.

A tension spring 314 is connected between the bottom of the upright 311 and the inner wall of the bottom of the insertion hole 313, and the upright 311 can slide up and down in the insertion hole 313 of the base 310 to adjust the height of the cross beam 312 in a self-adaptive manner.

The upright column 311 is arranged at the contact position of the inner wall of the insertion hole 313 and two groups of roller wheels which are arranged at intervals up and down and can be rotatably arranged on the outer wall of the upright column, each group of roller wheels comprises a first pulley block 315 positioned above and a second pulley block 316 positioned below, and each group of roller wheels comprises a plurality of pulleys 317 which are arranged along the circumferential direction of the upright column 311 and can be rotatably connected to the outer wall of the upright column 311.

The upright column 311 is in rolling contact with the inner wall of the insertion hole 313 through the pulley 317, and the upright column 311 can be ensured to smoothly slide up and down along a straight line.

In this embodiment, under the action of the tension spring 314, when the toggle lever 324 on the cross beam 312 does not receive the external force, the tension of the tension spring 314 makes the upright column 311 at the lowest position; when the toggle lever 324 is acted by external force of the coal seam below and transmitted to the beam 312, the beam 312 exerts upward acting force on the column 311, the column 311 stretches the tension spring 314 to rise, and finally the beam 312 drives the toggle lever 324 to rise to pull the distance from the coal seam below, thereby realizing the purpose of pulling the distance from the coal seam below to the coal seam below

The main purpose of the adaptive adjustment of the height is to avoid obstacles (such as excessive iron impurities, gangue, etc.) in the coal seam, so as to prevent the overturning rod 324 from being rigidly blocked by the obstacles and being unable to rotate, thereby preventing the overturning rod 324 from being damaged or preventing the overturning rod 324 from being stuck to cause motor damage. Specifically, when a barrier (such as an excessive iron impurity, gangue) occurs in the coal seam and the reaction force on the toggle lever 324 is excessive, the upward acting force generated by the toggle lever 324 on the upright column 311 is greater than the downward pulling force of the tension spring 314, so that the upright column 311 moves upward, the height of the cross beam 312 is finally increased, the toggle lever 324 is increased, the distance between the toggle lever and the coal seam is increased, and the toggle lever 324 can conveniently cross the current barrier.

It should be understood that, since the coal seam needs to be turned by the turning lever 324, a certain degree of reaction force needs to be allowed, and therefore the tension spring 314 needs to have enough tension in a certain range, so that when a normal coal seam is turned, the upright column 311 basically does not move upwards or only moves upwards by a small amount, so that the distance between the turning lever 324 and the coal seam below is kept moderate for effective turning; only when the reaction force applied to the toggle lever 324 is too large due to the obstacle in the coal burning seam, the tension spring 314 is obviously stretched, so that the toggle lever 324 is obviously lifted.

In a preferred embodiment, a stop collar 318 is attached to an inner wall of the receptacle 313, the stop collar 318 being positioned between the first pulley arrangement 315 and the second pulley arrangement 316. The inner race of the stop collar 318 is dimensioned such that any slippage of the first pulley arrangement 315 and the second pulley arrangement 316 cannot pass over the stop collar 318 and is thereby restricted in its position of movement.

In this embodiment, 2 limit positions at which the upright column 311 moves up and down can be limited by a single limiting ring 318, specifically, when the lower part of the pulley 317 in the first pulley block 315 is in contact with the upper surface of the limiting ring 318 and is blocked, the upright column 311 is at the lowest position (the flipping lever 324 does not receive an external force, the tension of the tension spring 314 is that the upright column 311 descends to the lowest, and a certain gap H1 still remains between the flipping lever 324 and the belt below), see fig. 7-8; when the upper part of the pulley 317 in the second pulley block 316 contacts with the lower surface of the limiting ring 318 and is blocked, the upright 311 is at the highest position (the turning rod 324 does not receive the external force, the upright 311 rises to the highest position, referring to fig. 9-10, the distance between the turning rod 324 and the belt below is the largest H2), so as to prevent the upright 311 from being excessively lifted to influence the stability of the upright 311 and the cross beam 312, and further prevent the upright 311 from sliding out of the base 310.

Example 3

Referring to fig. 11 to 14, as a further improvement on the basis of embodiment 1, in this embodiment, the iron removing mechanism 3 includes a mounting bracket 31, a rotary flipping mechanism 32 rotatably disposed on the mounting bracket 31, an adsorbing mechanism 33 disposed on the mounting bracket 31 and above the rotary flipping mechanism 32, and an auxiliary drum rotatably disposed on the rack and below the belt;

the adsorption mechanism is an electromagnet or a permanent magnet, the mounting bracket 31 is arranged above the belt 23 in a crossing manner, the rotary turning mechanism 32 can turn over the material of the belt 23, and the adsorption mechanism 33 is used for adsorbing iron impurities in the material.

The rotary turning mechanism 32 includes a rotating shaft 320 rotatably disposed on the mounting bracket 31, an iron removing motor 321 for driving the rotating shaft 320 to rotate, an iron removing drum 322 fixedly disposed on the rotating shaft 320, a plurality of mounting rings 323 disposed on the iron removing drum 322 and having adjustable intervals, and a turning lever 324 fixedly connected to the mounting rings 323.

Wherein, the auxiliary roller 34 is positioned behind the mounting bracket 31 along the feeding direction, and the cross section of the auxiliary roller 34 is elliptical or cam-shaped; in the present embodiment, the elliptical shape is preferable, and the following description will be given taking this as an example. The two ends of the auxiliary roller 34 are pivoted on the mounting blocks 340, and the two mounting blocks 340 are fixedly connected on the frame. In the embodiment, the coal seam turning device comprises 2 groups of iron removing mechanisms 3, each group is provided with an auxiliary roller 34 in a matching mode, the auxiliary rollers 34 are used for matching with the rotary turning mechanism 32, and the coal seam on the belt is loosened through the bumping effect generated by the rotation of the auxiliary rollers 34 so as to improve the subsequent turning effect. Specifically, the auxiliary drum 34 is pressed below the belt, and when the belt conveys the fire coal, the auxiliary drum 34 below is driven to rotate by friction force, and since the auxiliary drum 34 is elliptical and the height of the auxiliary drum is greater than the height of the belts in front and at the back of the auxiliary drum, an upward convex arc peak is formed on the belt above the auxiliary drum 34, so that the fire coal on the arc peak is closer to the turnover rod 324. Referring to fig. 12, solid lines and broken lines indicate the highest position and the lowest position of the belt herein, respectively; secondly, because the elliptical auxiliary roller 34 rotates, the height of the arc peak point changes along with the rotation of the auxiliary roller 34, so that an up-and-down bumping effect is formed at the arc peak point, a coal layer on a belt is pre-loosened by the bumping effect generated by the auxiliary roller 34 before entering the turning position below the turning lever 324, the coal layer is lifted, the coal layer is closer to the turning lever 324, the turning effect of the turning lever 324 on the coal is improved, and the iron removal effect is improved. It should be understood that the height and size of the supplementary drum 34 should be designed appropriately and should not be too large to prevent the accumulation of the coal above the supplementary drum 34.

Wherein, a plurality of mounting threaded holes 325 are arranged on the outer wall of the iron removing roller 322, and the mounting ring 323 is connected with the mounting threaded holes 325 through fixing screws 326. Referring to fig. 6, 7 and 11, the mounting screw holes 325 include a plurality of rows, and the distance between the mounting rings 323 can be adjusted by adjusting the fixing positions of the mounting rings 323 on the plurality of rows of mounting screw holes 325, and the number of the mounting rings 323 can also be adjusted. The iron removal effect is adjusted by adjusting the distance between the mounting rings 323, when the distance is reduced, the overturning rod 324 is arranged more densely, the material is overturned more thoroughly, and therefore the adsorption mechanism 33 can be more beneficial to absorbing iron impurities.

Therefore, when the coal-fired boiler is used, the distance between the mounting rings 323 can be adjusted according to the content of iron impurities in the coal-fired materials, and when the content of the iron impurities is higher or the content of the iron impurities in the coal-fired materials after impurity removal is too high, the distance can be reduced; when the content of iron impurities is reduced, the distance can be enlarged, the number of the mounting rings 323 is reduced, and the energy consumption of the motor is reduced. Through the design of above-mentioned mechanism, can improve the adaptability of device, and adjust the convenience.

The turning over lever 324 comprises a plurality of turning over levers which are uniformly arranged on the periphery of the mounting ring 323 at intervals, the whole turning over lever 324 is in a hook shape, and the turning over lever 324 rotates towards the fire coal on the fire coal conveying device to turn over the fire coal. The bent hook shape can facilitate the turning over deflector rod 324 to fully turn over the fire coal, and simultaneously can reduce the resistance effect of the fire coal on the turning over deflector rod 324.

In a further preferred embodiment, the toggle lever 324 is generally hook-shaped and includes an arcuate portion 3240 coupled to an outer periphery of the mounting ring 323, a cylindrical portion 3241 coupled to an end of the arcuate portion 3240, and an inner magnetic cone 3242 coupled to the cylindrical portion 3241.

The arrangement of the magnetic inner cone 3242 with a sharp end can facilitate the insertion of the poking rod 324 into a coal burning seam for poking. Due to the shape of the arc portion 3240, it has a certain elasticity, which can reduce the rigid contact, and provide a certain protection for the toggle lever 324 and the mounting ring 323, for example, when the toggle lever 324 touches a hard object such as a piece of iron or gangue, the toggle lever 324 can pass through the hard object through a deformation action, thereby preventing the toggle lever 324 or other components from being stuck or damaged. The arcuate portion 3240 may be made of iron, stainless steel, or the like.

Referring to fig. 13-14, in a further preferred embodiment, the toggle lever 324 further comprises an outer taper sleeve 3243 rotatably fitted over the inner magnetic cone 3242 and a rib 3244 spirally wound around an outer wall of the outer taper sleeve 3243;

an annular mounting groove 3245 is formed in the outer wall of the cylinder portion 3241, and a top column 3246 is arranged at the tail end of the magnetic inner cone 3242;

the outer taper sleeve 3243 comprises a cylindrical sleeve 32430 sleeved outside the cylindrical portion 3241 and a taper sleeve 32431 connected with the cylindrical sleeve 32430 and sleeved outside the magnetic inner taper body 3242, a connecting ring 32432 rotatably arranged in the annular mounting groove 3245 is connected to the inner wall of the cylindrical sleeve 32430, and a top groove 32433 for the top column 3246 to be inserted in a matched mode is formed in the inner wall of the top of the taper sleeve 32431.

Wherein, the connection ring 32432 and the annular installation groove 3245 are contacted through an arc surface, and the top column 3246 and the top groove 32433 are contacted through an arc surface.

That is, the outer wall of the connection ring 32432 contacting the annular installation groove 3245 is arc-shaped, and the bottom surface of the annular installation groove 3245 is also arc-shaped concave. The end of the top pillar 3246 is spherical or arc-shaped, and the bottom surface of the top groove 32433 is spherical concave or arc-shaped concave. Because the outer taper sleeve 3243 is rotatably disposed outside the inner magnetic cone 3242 by the engagement of the top pillar 3246, the connection ring 32432 and the corresponding groove, the friction between the contact surfaces can be reduced by the contact of the arc surfaces, and the service life is prolonged. The top column 3246 is used for realizing axial limiting, the connecting ring 32432 is used for realizing circumferential limiting, and the outer taper sleeve 3243 can be firmly arranged on the magnetic inner cone 3242 and cannot fall off in the using process.

The tapered sleeve 32431 is preferably made of iron, so that the inner magnetic cone 3242 can adsorb part of iron impurities in the coal through the tapered sleeve 32431.

Obstacles such as coal gangue, iron impurity hard objects or massive objects are inevitably mixed in the fire coal, and when the turning over deflector rod 324 meets the obstacles, if the obstacles cannot be avoided in a self-adaptive manner, the turning over deflector rod 324 is easily damaged, and even the turning over deflector rod 324 cannot rotate, so that a motor providing rotating power for the turning over deflector rod is jammed and damaged. In this embodiment, the structural design of the turning lever 324 is matched with the structure of the mounting bracket 31 capable of adaptively adjusting the height of the beam 312, so that the situation can be effectively avoided, the turning lever 324 can adaptively avoid obstacles during turning operation, effective turning of fire coal can be ensured, and mechanism damage can be avoided. The principle of this will be specifically described below.

In this embodiment, the height of the cross beam 312 in the mounting bracket 31 can be adaptively adjusted within a certain range along with the reaction force of the coal seam on the toggle lever 324, specifically, when an obstacle (such as an excessive iron impurity, gangue, etc.) occurs in the coal seam and the reaction force on the toggle lever 324 is too large, the upward acting force generated by the toggle lever 324 on the upright column 311 is greater than the downward pulling force of the tension spring 314, so that the upright column 311 moves upward, and finally the height of the cross beam 312 rises, the toggle lever 324 rises, the distance between the toggle lever 324 and the coal seam increases, and the toggle lever 324 can conveniently pass over the current obstacle, so as to avoid damage to the toggle lever 324 or other related mechanisms. In the present embodiment, the structural design of the toggle lever 324 can further cooperate with the above-mentioned functions of the mounting bracket 31, so as to enhance the function of the toggle lever 324 for adaptively crossing obstacles. In this embodiment, since the outer taper sleeve 3243 at the end of the toggle lever 324 is rotatably sleeved outside the inner magnetic cone 3242, the outer taper sleeve 3243 rotates around the inner magnetic cone 3242 due to the resistance of the coal during the rotation of the toggle lever 324, when the end of the toggle lever 324 encounters an obstacle, the outer taper sleeve 3243 contacts the obstacle, and the acting force generated by the contact collision between the toggle lever 324 and the obstacle can be largely removed by the rotation of the outer taper sleeve 3243; then, the functional structure of the upright column 311 is moved upward by the reaction force of the obstacle in the mounting bracket 31 to the toggle lever 324, so that the toggle lever 324 is lifted upward, and finally the obstacle can be smoothly passed over.

On the other hand, due to the arrangement of the magnetic inner cone 3242, when the fire coal is turned over, a certain amount of iron impurities can be adsorbed by the magnetic inner cone 3242, and the adsorption effect is obviously smaller than that of the adsorption mechanism 3, so that when the turning over rod 324 rotates to the highest point, the adsorbed iron impurities are adsorbed by the adsorption mechanism 3; thereby further improving the iron removal effect, and particularly absorbing and removing small-particle iron impurities which are not easy to be directly absorbed by the adsorption mechanism 3 buried in the coal.

Furthermore, as the outer wall of the outer taper sleeve 3243 is provided with the reinforcing ribs 3244 which are spirally arranged, the strength of the outer taper sleeve 3243 can be improved, more importantly, the reinforcing ribs 3244 which are spirally arranged can be rotated during turning so as to be more beneficial to turning over and loosening a burning coal bed and generate a lifting effect on coal, so that iron impurities in the coal can be conveniently separated from the burning coal, the iron impurities are firstly adsorbed by the magnetic inner cone 3242 and then are absorbed by the adsorption mechanism 3, the iron removal effect can be improved by the absorption of the turning rod 324 during turning over, and the iron impurities adsorbed on the turning rod 324 can be prevented from falling into the burning coal when the turning rod 324 is turned over again, in addition, adverse effects on turning over again due to adsorption can be prevented, and the turning effect can be further improved.

The outer taper sleeve 3243 can well protect the inner magnetic inner cone 3242, so that the service life of the inner magnetic cone 3242 is prolonged; the outer taper sleeve 3243 can be replaced conveniently when damaged, and cost can be reduced.

In a further preferred embodiment, the adsorption mechanism 33 is removably attached to the beam 312, and after a period of use, the adsorption mechanism 33 can be removed to remove the adsorbed iron impurities.

While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.

Claims (8)

1. A boiler feeding device is characterized by comprising a frame, a belt conveyor arranged on the frame and at least one iron removing mechanism arranged on the frame,

the belt conveyor comprises a conveying motor, a driving roller which is rotatably arranged at the first end of the rack and is in driving connection with an output shaft of the conveying motor, a driven roller which is rotatably arranged at the second end of the rack, a belt arranged between the driving roller and the driven roller and two belt tensioning mechanisms which are symmetrically arranged at the second end of the rack;

the belt tensioning mechanism comprises a first mounting plate fixedly connected to the first end of the rack, a second mounting plate vertically connected to the first mounting plate, two slide rails fixedly connected to the upper end and the lower end of the first mounting plate, a sliding mounting block slidably arranged between the two slide rails, a driving nut fixedly connected to the sliding mounting block, and a tensioning screw rod, wherein the first end of the tensioning screw rod is in threaded connection with the second mounting plate, the second end of the tensioning screw rod is in threaded connection with the driving nut, and sliding grooves matched with the slide rails are formed in the upper end face and the lower end face of the sliding mounting block;

the sliding installation block is also provided with a bearing, the first installation plate is provided with an adjusting groove along the material transportation direction, and the end part of a driven shaft connected to the driven roller penetrates through the adjusting groove to be inserted into the bearing in a matching manner;

one end of the sliding mounting block, which is close to the second mounting plate, is provided with a holding groove into which the second end of the tensioning screw rod extends, and the driving nut is arranged at the port of the holding groove;

arc-shaped clamping pieces are arranged on the inner walls of the two sides of the sliding groove, and clamping grooves for the arc-shaped clamping pieces to be clamped into are formed in the outer walls of the two sides of the sliding rail along the material conveying direction;

the first end and the second end of the arc-shaped clamping piece are fixedly connected with the inner wall of the sliding chute, and an arc-shaped bulge far away from the inner wall of the sliding chute is formed between the first end and the second end of the arc-shaped clamping piece;

the distance between the arc-shaped protrusion and the first end of the arc-shaped card is smaller than the distance between the arc-shaped protrusion and the second end of the arc-shaped card;

the arc protruding with form first rake between the first end of arc card, the arc protruding with form the second rake between the second end of arc card, the inclination of first rake is greater than the second rake.

2. The boiler feeding device according to claim 1, wherein the iron removing mechanism comprises a mounting bracket, a rotary turning mechanism rotatably arranged on the mounting bracket, an adsorption mechanism arranged on the mounting bracket and above the rotary turning mechanism, and an auxiliary roller rotatably arranged on the rack and below the belt;

the adsorption mechanism is an electromagnet or a permanent magnet, the mounting bracket is arranged above the belt in a crossing manner, and the rotary turning mechanism can turn over the material of the belt and absorb iron impurities in the material through the adsorption mechanism.

3. The boiler feeding device according to claim 2, wherein the auxiliary roller is positioned behind the mounting bracket along the feeding direction, and the cross section of the auxiliary roller is elliptical or cam-shaped.

4. The boiler feeding device according to claim 3, wherein the rotary turning mechanism comprises a rotating shaft rotatably disposed on the mounting bracket, an iron removing motor for driving the rotating shaft to rotate, an iron removing roller fixedly disposed on the rotating shaft, a plurality of mounting rings with adjustable intervals and sleeved on the iron removing roller, and a turning lever fixedly connected to the mounting rings;

the outer wall of the iron removing roller is provided with a plurality of mounting threaded holes, and the mounting ring is connected with the mounting threaded holes through fixing screws;

the turning and shifting rod comprises a plurality of turning and shifting rods which are uniformly arranged on the periphery of the mounting ring at intervals, and the turning and shifting rods face the fire coal on the fire coal conveying device to rotate so as to turn and shift.

5. The boiler feeding device according to claim 4, wherein the mounting bracket comprises two bases, two upright columns movably inserted into the insertion holes of the two bases, and a cross beam connected between the two upright columns;

the adsorption mechanism is arranged on the cross beam, and two ends of the rotating shaft are rotatably connected to the two upright posts;

the bottom of stand with be connected with the extension spring between the bottom inner wall of jack, the stand can slide from top to bottom in the jack of base with the height of self-adaptation regulation the crossbeam.

6. The boiler feeding device according to claim 5, wherein the upright post is contacted with the inner wall of the jack through two sets of roller groups which are arranged at intervals up and down and are rotatably arranged on the outer wall of the upright post, each roller group comprises a first pulley block positioned at the upper part and a second pulley block positioned at the lower part, and each roller group comprises a plurality of pulleys which are arranged along the circumferential direction of the upright post and are rotatably connected on the outer wall of the upright post;

the inner wall of the jack is connected with a limiting ring, and the limiting ring is located between the first pulley block and the second pulley block.

7. The boiler feeding device according to claim 4, wherein the toggle lever is integrally in a hook shape and comprises an arc-shaped portion connected with the outer periphery of the mounting ring, a cylindrical portion connected with the end of the arc-shaped portion, and a magnetic inner cone connected with the cylindrical portion.

8. The boiler feeding device according to claim 7, wherein the toggle rod further comprises an outer taper sleeve rotatably sleeved outside the inner magnetic cone and a reinforcing rib spirally and circumferentially arranged on the outer wall of the outer taper sleeve;

an annular mounting groove is formed in the outer wall of the cylindrical part, and a top column is arranged at the tail end of the magnetic inner cone;

the cover of establishing including outer taper sleeve is established outer column cover in the column body portion and with the cover that column cover is connected is established outer taper sleeve in the magnetism, be connected with rotatable setting on the inner wall of column cover and be in go-between in the annular mounting groove, the confession has been seted up on the top inner wall of taper cover the male overhead tank of overhead column cooperation, go-between and annular mounting groove pass through the arcwall face contact, overhead column and overhead tank pass through the arcwall face contact.

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