CN112678414A - Anti-blocking device and anti-blocking method for fuel channel - Google Patents

Abstract

The invention provides an anti-blocking device of a fuel channel and an anti-blocking method thereof, comprising a rotary driving shaft, a support arm fixed on the rotary driving shaft and a flexible rope pendulum connected with the support arm, wherein the support arm is arranged along the direction parallel to the inner wall of a coal dropping pipe and rotates or swings along with the rotary driving shaft, the top end of the flexible rope pendulum is connected with the free end of the support arm, the bottom end of the flexible rope pendulum extends downwards along the coal dropping pipe, the flexible rope pendulum is positioned on one side of the support arm far away from the inner wall of the fuel channel, and simultaneously, before the belt conveyor is started to convey the fuel to the fuel channel, the working state that the top end of the flexible rope pendulum rotates or swings along with the support arm is kept, so that the whole flexible rope pendulum can be twisted and swung up and down along the inner wall of the fuel channel to continuously dredge the fuel, and the fuel accumulated on the side wall of the fuel channel is stirred down, so that the functions of preventing and dredging fuel blockage in the fuel channel are realized.

Description

Anti-blocking device and anti-blocking method for fuel channel

Technical Field

The invention relates to the field of material conveying anti-blocking, in particular to a fuel channel anti-blocking device and a coal breakage anti-blocking method thereof.

Background

The fuel channel is an important connecting channel of a fuel system of a thermal power plant, such as a coal dropping pipe or a coal dropping bucket, and the like, most of the existing fuel channels are made of carbon steel, the content of the pipe wall is easy to corrode, rust and roughen, so that fuel is accumulated on the surface of the pipe wall, especially when the granularity of coal is 5-50 mu m and the humidity is more than 15%, the fuel is easy to bond on the pipe wall, the resistance of the inner wall of the pipe is increased, and when the conveying amount is slightly large, instant expansion and collection can be generated, so that the problems of blockage and adhesion can; meanwhile, the existing fuel has complex sources, the inferior fuel and the ship fuel are increased, the coal age is short, the ash content is large, the total moisture content is high, and the like, so that the coal powder is accumulated and bonded, and is not easy to slide down to cause blockage; the two sides of the inclined through pipe and the dead angle of the bottom surface are easy to hang coal and agglomerate for a long time, so that the effective space of the pipeline is reduced, a bottleneck bayonet is generated, and the conveying capacity is increased, so that the inclined through pipe is easy to block.

The existing scheme for preventing the blockage of the coal dropping pipe mainly comprises the following steps: manually cleaning the blocked coal dropping pipe; laying a high-molecular wear-resistant material or a stainless steel plate lining on the inner wall of the coal dropping pipe to reduce the attachment and bonding of the coal powder; a rapping motor is arranged on the outer wall of the coal dropping pipe, and the coal is shaken down through mechanical vibration. However, the above anti-blocking or material-cleaning scheme inevitably brings the defects of labor and time waste, high labor intensity, high cost, difficult replacement and unobvious effect.

Patent document with application number 201811060638.9 discloses a stifled device is prevented to boiler feeder, and the installation is equipped with high-pressure tuber pipe on the communications tilt wall in coal bunker, and high-pressure tuber pipe is connected with the high compression pump that fixed mounting set up on the coal bunker outer wall, has seted up a plurality of ventilation hole on the pipe wall of high-pressure tuber pipe, is the drive belt that the coal breakage was carried under the coal bunker, but it prevents stifled effect and is not obvious.

Disclosure of Invention

The invention aims to provide a fuel channel anti-blocking device and a coal breakage anti-blocking method thereof, aiming at solving the technical problems.

In order to achieve the purpose, the invention provides the following scheme: the utility model provides a be applied to anti-blocking device on fuel passageway, include the rotation driving axle, fix last support arm of rotation driving axle and with the flexible rope pendulum that the support arm is connected, the support arm sets up and follows along the direction parallel with fuel passageway inner wall the rotation driving axle rotates or swings, the top of flexible rope pendulum is connected on the free end of support arm, the fuel passageway downwardly extending is followed to the bottom, just flexible rope pendulum is located keep away from one side of fuel passageway inner wall on the support arm.

Preferably, the support arm is provided with a connecting shaft parallel to the axis of the rotary driving shaft, and the flexible rope pendulum is hinged on the connecting shaft.

Preferably, the flexible rope pendulum with be provided with the adapter sleeve between the connecting axle, the adapter sleeve rotates the cover and establishes on the connecting axle, be equipped with first annular flange on the outer wall of connecting axle and with the annular that first annular flange interval set up fills up, the adapter sleeve presss from both sides tightly and sliding connection is in first annular flange with between the annular fills up.

Preferably, the connecting shaft and the outer side of the connecting sleeve are provided with a protective cover which is fixedly connected to the connecting sleeve, and the protective cover is provided with two through holes which are respectively used for the connecting shaft and the flexible rope to pass through.

Preferably, be equipped with on the outer wall of connecting axle and be located first annular flange reaches second annular flange between the support arm, first annular flange with second annular flange interval sets up, and is used for the through-hole that the connecting axle passed cup joints and sliding seal connects and is located on the part connecting axle between first annular flange and the second annular flange.

Preferably, a driving mechanism for driving the rotary driving shaft is arranged outside the fuel channel, the rotary driving shaft penetrates through the outer wall of the fuel channel and extends into the fuel channel, a connecting seat for mounting the driving mechanism is fixed on the outer wall of the fuel channel in a sealing manner, a connecting seat through hole for the rotary driving shaft to penetrate through is formed in the connecting seat, and the inner wall of the connecting seat through hole and the outer wall of the rotary driving shaft are sealed in a sliding manner.

Preferably, the outward flange of connecting seat court actuating mechanism extends and constitutes ring shape arch, the bellied inboard of ring shape is equipped with to cup joint and is in the last ring dish of rotation driving axle, the outward flange of ring dish is close to the bellied inner wall of ring shape, just the bellied bottom of ring shape is offered and is used for deriving the opening of buggy, the opening is located the ring dish with between the connecting seat.

Preferably, the outer wall of the connecting seat is hermetically sleeved with an annular cover, and the annular cover is hermetically connected to the outer wall of the fuel channel.

Preferably, the support arm is used for connecting the one end of rotatory drive shaft has seted up the connecting hole, the connecting hole can be dismantled the cup joint and be in on the rotatory drive shaft.

Also provides a fuel channel anti-blocking method, which comprises the following steps:

s1, preparation: the driving mechanism is started to drive the rotary driving shaft to rotate and drive the support arm to rotate or swing, and the top end of the flexible rope pendulum rotates or swings along with the support arm, so that the whole flexible rope pendulum can be twisted and swung up and down along the inner wall of the fuel channel to slide and the working state is kept;

s2, thinning: starting a belt conveyor to convey fuel into a fuel channel, guiding and transporting the fuel by using the fuel channel, dredging the fuel by the flexible rope pendulum continuously, and stirring the fuel accumulated on the side wall of the fuel channel;

s3, material clearing stage: and stopping the belt conveyor after the fuel conveying is finished, and closing the driving mechanism after the fuel in the fuel channel is cleaned.

Compared with the prior art, the invention has the following technical effects:

it is first, the support arm sets up and rotates or the swing along with the direction parallel with the fuel passageway inner wall and along with the rotation of rotation drive axle, the top of flexible rope pendulum is connected on the free end of support arm, fuel passageway downwardly extending is followed to the bottom, and flexible rope pendulum is located the one side of keeping away from the fuel passageway inner wall on the support arm, make the top of flexible rope pendulum rotate or swing along with the support arm, and then make whole flexible rope pendulum slide along the interior wall twist and turn from top to bottom of fuel passageway, continuous dredging the fuel, and will pile up the fuel of piling up on the fuel passageway lateral wall and dial, the prevention that has realized fuel jam in the fuel passageway and dredge the function.

And secondly, a connecting shaft parallel to the axis of the rotary driving shaft is arranged on the supporting arm, and the flexible rope pendulum is hinged on the connecting shaft, so that the situation that the connecting part of the flexible rope pendulum and the connecting shaft is excessively bent in the swinging or rotating process is avoided, and the fracture damage is easily caused.

And thirdly, the outer wall of the connecting shaft is provided with a first annular flange and an annular sealing gasket arranged at an interval with the first annular flange, the connecting sleeve is clamped and slidably connected between the first annular flange and the annular sealing gasket, and then the annular sealing gasket and the first annular flange are utilized to form sealing between the connecting sleeve and the connecting shaft, so that the service life of the connecting sleeve is prolonged.

Fourth, the outward flange of connecting seat extends towards actuating mechanism and constitutes ring shape arch, and the bellied inboard of ring shape is equipped with the ring dish of cup jointing in the rotation driving axle, and the outward flange of ring dish is close to the bellied inner wall of ring shape, and then forms approximate sealed cavity in the rotation driving axle outside, if the buggy in the fuel passageway flows along the rotation driving axle also can restrict it in above-mentioned cavity, avoids spouting to cause the damage to drive arrangement on the drive arrangement.

Fifth, the bottom of the circular ring bulge is provided with an opening for guiding out the pulverized coal, the opening is located between the circular ring disc and the connecting seat, and if the pulverized coal in the fuel channel flows out, the pulverized coal can be recovered from the opening in a centralized manner, so that the pulverized coal is prevented from being scattered all around to pollute the environment.

Sixthly, the outer wall of the connecting seat is hermetically connected with an annular cover, and the annular cover is hermetically connected to the outer wall of the fuel channel to form sealing between the outer side of the connecting seat and the fuel channel, so that the sealing connection effect between the driving mechanism and the fuel channel is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a side view of an anti-clogging device for a fuel passage;

FIG. 2 is a rear view of the anti-clogging means of the fuel passage;

FIG. 3 is an enlarged view at the connecting shaft;

FIG. 4 is an enlarged view of the connecting seat;

FIG. 5 is a side view of a coal dropping pipe equipped with an anti-clogging means for a fuel passage;

FIG. 6 is a front view of a coal dropping pipe equipped with an anti-clogging means for a fuel passage;

FIG. 7 is a schematic view showing the connection between the anti-clogging device of the fuel passage and the coal dropping pipe;

FIG. 8 is an enlarged view of the flexible rope pendulum;

the device comprises a driving mechanism 1, a flange plate 2, a complementary plate 3, a frame plate 4, a circular ring plate 5, a connecting seat 6, a support arm 7, a flexible rope pendulum 8, a shield 9, a connecting shaft 10, a connecting sleeve 11, a second annular flange 12, a first annular flange 13, an annular sealing gasket 14, an oil seal 15, a shaft end baffle 16, a coal dropping pipe 17, a split pin 18, a coal dropping pipe outer wall 19, an anti-blocking device 20 and a rope pendulum sleeve 21.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide an anti-blocking device and an anti-blocking method for a fuel channel, aiming at solving the technical problems.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1 to 8, an anti-blocking device 20 applied to a fuel channel is provided, where the applicable fuel channel includes a coal chute, a coal hopper, or other transportation channels, and the embodiment specifically exemplifies an implementation manner applied to the coal chute, the anti-blocking device 20 includes a rotary driving shaft, a supporting arm 7 fixed on the rotary driving shaft, and a flexible rope pendulum 8 connected to the supporting arm 7, and the supporting arm 7 and the flexible rope pendulum 8 are selected to have certain strength and wear resistance, such as steel material, so as to ensure that when pulverized coal or coal slag flows in the coal chute 17, the supporting arm 7 and the flexible rope pendulum 8 can bear impact and friction of the pulverized coal or coal slag; the support arms 7 are arranged in a direction parallel to the inner wall of the coal dropping pipe 17 and rotate or swing along with the rotating driving shaft, for example, the rotating driving shaft performs reciprocating swing at a certain angle to drive the support arms 7 to perform reciprocating swing or the rotating driving shaft rotates to drive the support arms 7 to rotate around the axis of the rotating driving shaft, one or more preferable support arms 17 can be arranged, and each support arm 17 is connected with a flexible rope pendulum 8; the top end of the flexible rope pendulum 8 is connected to the free end of the support arm 7, and the bottom end extends downwards along the coal dropping pipe 17, wherein the flexible pendulum rope is far longer than the support arm 7 to ensure the swing amplitude and the material cleaning range, preferably, the flexible rope pendulum 8 is a 9 x 16 or other steel wire rope with similar specification, or a rope-shaped structure with certain flexibility and rigidity such as a plate chain, a chain or a steel bar is adopted, meanwhile, the radian of the flexible rope pendulum 8 is matched with the radian of the inner wall of the coal dropping pipe 17 in the vertical direction, and the bottom end of the flexible rope pendulum is close to the inner wall of the coal dropping pipe 17 or directly attached to the inner wall of the coal dropping pipe 17, particularly attached to a position where the content of the coal dropping pipe 17 is easy to block; when using, the top of flexible rope pendulum 8 rotates or the swing along with support arm 7, the torsion pendulum slides from top to bottom along the inner wall of coal breakage pipe 17 in its bottom, continuous dredging the cinder, and will pile up the cinder on the coal breakage pipe 17 inner wall and dial down, the prevention and dredging function to coal material jam in coal breakage pipe 17 has been realized, simultaneously for reducing the swing or the rotation of flexible rope pendulum 8 not obstructed, and avoid the friction between flexible rope pendulum 8 and the support arm 7, flexible rope pendulum 8 is located one side of keeping away from coal breakage pipe 17 inner wall on the support arm 7, and set up with certain interval and support arm 7 interval, the bottom of preferred flexible rope pendulum 8 is equipped with rope pendulum cover 21, in order to reduce the top of rope pendulum to the friction of coal breakage pipe 17 inner wall.

In order to avoid the flexible rope pendulum 8 from being easily damaged at the joint, the preferred support arm 7 and the flexible rope pendulum 8 are hinged together, for example, in a hinge connection or a hinge connection mode, as a preferred embodiment of the present invention, a connection shaft 10 parallel to the axis of the rotating drive shaft is arranged on the support arm 7, and the flexible rope pendulum 8 is hinged on the connection shaft 10, on one hand, the connection shaft 10 is parallel to the axis of the rotating drive shaft, so that the swinging or rotating plane of the flexible rope pendulum 8 is perpendicular to the axis of the rotating drive shaft, and the effectiveness of the swinging or rotating amplitude of the flexible rope pendulum 8 is ensured, on the other hand, the top end of the flexible rope pendulum 8 can swing or rotate around the connection shaft 10, and the situation that the joint on the flexible rope pendulum 8 and the connection shaft 10 is excessively bent in the swinging or rotating process is avoided.

Moreover, a connecting sleeve 11 is arranged between the flexible rope pendulum 8 and the connecting shaft 10, the connecting sleeve 11 is rotatably sleeved on the connecting shaft 10, a hidden bearing is arranged in the connecting sleeve 11, in order to ensure the rotation effect of the connecting sleeve 11 around the connecting shaft 10 and avoid the influence or damage of the pulverized coal or the cinder on the rotation of the connecting sleeve 11, the outer wall of the connecting shaft 10 is provided with a first annular flange 13 and an annular sealing gasket 14 arranged at an interval with the first annular flange 13, the connecting sleeve 11 is tightly clamped and slidably connected between the first annular flange 13 and the annular sealing gasket 14, the annular sealing gasket 14 and the first annular flange 13 are utilized to form sealing between the connecting sleeve 11 and the connecting shaft 10, the service life of the connecting sleeve 11 is prolonged, in order to ensure the sliding effect between the connecting sleeve 11 and the annular sealing gasket 14 and between the connecting sleeve 11 and the connecting sleeve 11, the connecting sleeve 11 is preferably a graphite copper sleeve or a graphite sleeve; as a preferred embodiment of the present invention, one end of the connecting sleeve 11, which is used for connecting the flexible rope pendulum 8, is provided with an annular groove, and the annular groove is sleeved on the outer circumferential wall of the flexible rope pendulum 8, so as to ensure the connection strength between the connecting sleeve 11 and the flexible rope pendulum 8.

In order to further avoid the influence of the pulverized coal and the cinder on the connection between the connecting shaft 10 and the connecting sleeve 11, as a preferred embodiment of the present invention, a protective cover 9 is arranged outside the connecting shaft 10 and the connecting sleeve 11, the protective cover 9 is fixedly connected to the connecting sleeve 11, preferably, the protective cover 9 is fixed on one side of the connecting sleeve 11, which is not connected with the flexible rope pendulum 8, by using bolts and the like, and the protective cover 9 is provided with two through holes respectively used for the connection shaft 10 and the flexible rope pendulum 8 to pass through, so as to cover the whole connecting structure, so as to fully ensure the blocking effect on the pulverized coal and the cinder, preferably, the through hole used for the connection shaft 10 to pass through is sleeved on the outer wall of the connecting shaft 10, and forms a sliding seal with the connecting shaft 10, the through hole used for the flexible rope pendulum 8 to pass through is sleeved on the outer wall of the connecting sleeve, the sealing between the connecting sleeve 11 and the connecting shaft 10 can be ensured, preferably, a split pin 18 is arranged on the connecting shaft 10 at one side of the annular sealing gasket 14 far away from the connecting sleeve 11, the split pin 18 is used for forming a squeezing effect on the annular sealing gasket 14, and the sealing effect of the annular sealing gasket 14 on the connecting part of the connecting sleeve 11 and the connecting shaft 10 is ensured.

As a preferred embodiment of the present invention, a second annular flange 12 located between the first annular flange 13 and the support arm 7 is disposed on an outer wall of the connecting shaft 10, the first annular flange 13 and the second annular flange 12 are disposed at an interval, and a through hole for the connecting shaft 10 to pass through is sleeved and connected to a portion of the connecting shaft 10 located between the first annular flange 13 and the second annular flange 12 in a sliding and sealing manner, so that the sliding and sealing between the shield 9 and the connecting shaft 10 is blocked by the first annular flange 13 and the second annular flange 12, thereby preventing the sliding and connecting portion from being damaged by pulverized coal or coal slag.

Furthermore, a driving mechanism 1 for driving a rotary driving shaft is arranged outside the coal dropping pipe 17, the driving mechanism 1 preferably adopts a speed reducing motor and the like, the rotary driving shaft is an output shaft of the speed reducing motor, the rotary driving shaft penetrates through the outer wall 19 of the coal dropping pipe and extends into the coal dropping pipe 17, a connecting seat 6 for installing the driving mechanism 1 is fixed on the outer wall of the coal dropping pipe 17 in a sealing manner, the preferred connecting seat 6 is detachably attached to the outer wall of the coal dropping pipe 17 through a bolt and other structures, a sealing element is arranged between the connecting seat 6 and the coal dropping pipe 17, or the connecting seat 6 is directly welded on the outer wall of the coal dropping pipe 17 in a sealing manner, one side of the connecting seat 6, which is not connected with the coal dropping pipe 17, is connected with the driving mechanism 1, and when the flange plate 2; offer the 6 through-holes of connecting seat that are used for the rotation drive axle to pass on the connecting seat 6, sliding seal between the inner wall of 6 through-holes of connecting seat and the outer wall of rotation drive axle, for example adopt a plurality of oil blanket 15 etc. the oil blanket 15 cup joints on the outer wall of rotation drive axle to be equipped with the spacer sleeve of cup jointing in the rotation drive axle between oil blanket 15.

The outward flange of connecting seat 6 extends towards actuating mechanism 1 and constitutes ring shape arch, the bellied inboard of ring shape is equipped with cup joints ring dish 5 in the rotation driving axle, the outward flange of ring dish 5 is close to the bellied inner wall of ring shape, and then form approximate sealed cavity in the rotation driving axle outside, coal dust in the coal breakage pipe 17 flows along the rotation driving axle and also can be restricted it in above-mentioned cavity, avoid spouting to cause the damage to drive arrangement on the drive arrangement, and the bellied bottom of ring shape is offered and is used for deriving the opening of buggy, the opening is located between ring dish 5 and the connecting seat 6, coal dust in the coal breakage pipe 17 flows and also can follow the opening part and concentrate recovery to it, avoid coal dust to spout the polluted environment all around.

Seal the cover seal on the outer wall of connecting seat 6 and have connect the annular cover, annular cover sealing connection is on coal breakage pipe 17's outer wall, in order to form the sealing between the connecting seat 6 outside and coal breakage pipe 17, the sealing connection effect between actuating mechanism 1 and coal breakage pipe 17 has been guaranteed, preferred annular cover is including stacking frame plate and the benefit board 3 that is together and all be annular structure mutually, the frame plate cup joints around the outer wall upper shed of coal breakage pipe 17, benefit board 3 seals cup joints on connecting seat 6's outer wall, and can dismantle connection and sealing connection on frame plate 4.

Simultaneously, the connecting hole has been seted up to the one end that support arm 7 is used for connecting the rotation drive axle, the connecting hole can be dismantled and cup joint on the rotation drive axle, it is preferred to be equipped with the parallel key between the inner wall of connecting hole and rotation drive axle, form the joint with the rotation drive axle, and can dismantle in the connecting hole and be connected with axle head baffle 16 in one side of keeping away from coal breakage pipe outer wall 19, not only can block support arm 7 and break away from the rotation drive axle, and can further place buggy or cinder and cause the damage to the junction of connecting hole and rotation drive axle, it is preferred to lead to the rotation drive axle to damage easily for avoiding the contact between rotation drive axle and the connecting seat 6, the connecting hole extends towards the outer wall of coal breakage pipe 17 and forms tubular structure, tubular structure pierces into in the connecting.

The invention also provides a fuel channel anti-blocking method, which comprises the following steps:

s1, preparation: the opening driving mechanism 1 drives the rotating driving shaft to operate and drives the supporting arm 7 to rotate or swing, and the top end of the flexible rope pendulum 8 rotates or swings along with the supporting arm 7, so that the whole flexible rope pendulum 8 is twisted and swung up and down along the inner wall of the coal dropping pipe 17 to slide and keep the working state; so as to carry out direct dredging function on subsequent blanking and assist the falling of the coal material; according to the actual working condition, a plurality of groups of anti-blocking devices 20 can be arranged, and the adjacent anti-blocking devices 20 are arranged at intervals, so that the swinging of the flexible rope pendulum 8 is not influenced mutually, and the effectiveness of anti-blocking material cleaning is ensured;

s2, thinning: starting a belt conveyor to convey the fuel into the coal dropping pipe 17, guiding and transporting the fuel by using the coal dropping pipe 17, continuously dredging the fuel by the flexible rope pendulum 8 at the moment, and stirring the fuel accumulated on the side wall of the coal dropping pipe 17; the fuel accumulation formed in the initial stage is dispersed and falls, so that the phenomenon that the blockage situation is aggravated due to excessive accumulation is avoided, and the prevention work of coal breakage blockage is realized;

s3, material clearing stage: the belt conveyor is closed after the fuel conveying is finished, and the driving mechanism 1 is closed after the fuel in the coal dropping pipe 17 is cleaned, so that the influence on the next blanking is avoided.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (10)

1. The utility model provides a be applied to and prevent stifled device on fuel passageway, its characterized in that includes the rotation driving axle, fixes last support arm of rotation driving axle and with the flexible rope pendulum that the support arm is connected, the support arm sets up and follows along the direction parallel with fuel passageway inner wall the rotation driving axle rotates or swings, the top of flexible rope pendulum is connected on the free end of support arm, the fuel passageway downwardly extending is followed to the bottom, just flexible rope pendulum is located keep away from one side of fuel passageway inner wall on the support arm.

2. The anti-blocking device applied to the fuel passage as claimed in claim 1, wherein the support arm is provided with a connecting shaft parallel to the axis of the rotary driving shaft, and the flexible rope pendulum is hinged to the connecting shaft.

3. The anti-blocking device applied to the fuel channel as claimed in claim 2, wherein a connecting sleeve is arranged between the flexible rope pendulum and the connecting shaft, the connecting sleeve is rotatably sleeved on the connecting shaft, a first annular flange and an annular sealing gasket are arranged on the outer wall of the connecting shaft at an interval with the first annular flange, and the connecting sleeve is tightly clamped and slidably connected between the first annular flange and the annular sealing gasket.

4. The anti-blocking device applied to the fuel channel as claimed in claim 3, wherein a protective cover is arranged outside the connecting shaft and the connecting sleeve, the protective cover is fixedly connected to the connecting sleeve, and the protective cover is provided with two through holes for the connecting shaft and the flexible rope to pass through respectively.

5. The anti-blocking device applied to the fuel channel as claimed in claim 4, wherein a second annular flange is disposed on an outer wall of the connecting shaft and located between the first annular flange and the supporting arm, the first annular flange and the second annular flange are disposed at an interval, and the through hole for the connecting shaft to pass through is sleeved and connected with a portion of the connecting shaft located between the first annular flange and the second annular flange in a sliding and sealing manner.

6. The anti-blocking device applied to the fuel channel according to claim 1 or 5, wherein a driving mechanism for driving the rotary driving shaft is arranged outside the fuel channel, the rotary driving shaft penetrates through the outer wall of the fuel channel and extends into the fuel channel, a connecting seat for installing the driving mechanism is fixed on the outer wall of the fuel channel in a sealing manner, a connecting seat through hole for the rotary driving shaft to penetrate through is formed in the connecting seat, and the inner wall of the connecting seat through hole and the outer wall of the rotary driving shaft are sealed in a sliding manner.

7. The anti-blocking device applied to the fuel channel is characterized in that the outer edge of the connecting seat extends towards the driving mechanism and forms a circular ring-shaped protrusion, a circular ring disc sleeved on the rotating driving shaft is arranged on the inner side of the circular ring-shaped protrusion, the outer edge of the circular ring disc is close to the inner wall of the circular ring-shaped protrusion, an opening used for guiding pulverized coal is formed in the bottom of the circular ring-shaped protrusion, and the opening is located between the circular ring disc and the connecting seat.

8. The anti-blocking device applied to the fuel passage as claimed in claim 6, wherein an annular cover is hermetically sealed on the outer wall of the connecting seat, and the annular cover is hermetically connected to the outer wall of the fuel passage.

9. The anti-blocking device applied to the fuel channel as claimed in claim 1, wherein a connecting hole is formed at one end of the support arm for connecting the rotating driving shaft, and the connecting hole is detachably sleeved on the rotating driving shaft.

10. A fuel passage blockage preventing method using a blockage preventing means as claimed in any one of claims 1 to 9 applied to a fuel passage, comprising the steps of:

s1, preparation: the driving mechanism is started to drive the rotary driving shaft to rotate and drive the support arm to rotate or swing, the top end of the flexible rope pendulum rotates or swings along with the support arm, and the whole flexible rope pendulum is twisted and swung up and down along the inner wall of the fuel channel to slide and keep the working state;

s2, thinning: starting a belt conveyor to convey fuel into a fuel channel, guiding and transporting the fuel by using the fuel channel, dredging the fuel by the flexible rope pendulum continuously, and stirring the fuel accumulated on the side wall of the fuel channel;

s3, material clearing stage: and stopping the belt conveyor after the fuel conveying is finished, and closing the driving mechanism after the fuel in the fuel channel is cleaned.

Images