CN220519095U - Broken coal anti-blocking device - Google Patents

Abstract

The utility model discloses a crushed coal anti-blocking device, which comprises a coal hopper, a crushed coal mechanism and a tensioning driving mechanism, wherein the crushed coal mechanism is arranged at the upper end of the coal hopper; the coal crushing mechanism comprises a plurality of groups of crushing mechanisms, each group of crushing mechanisms comprises two crushing units, and a heat drying channel is arranged in each crushing unit. The crushing mechanism with the rotating shaft is arranged, so that the purpose of crushing coal and preheating can be realized, and the tensioning driving mechanism ensures the stability of the transmission of the rotating shaft; the coal hopper with the cavity, the coal scraping mechanism and the coal conveying assembly are arranged, so that not only can the dry coal materials be heated, but also the coal blocks attached in the coal hopper can be scraped, and meanwhile, accumulated coal in the coal hopper is stirred loose, and the coal materials are quickly moved out under the driving of the coal conveying assembly, and the coal conveying device is simple and practical in structure and convenient to operate.

Description

Broken coal anti-blocking device

Technical Field

The utility model relates to the technical field of coal for power generation boilers, in particular to a crushed coal anti-blocking device.

Background

Peat in coal is also called turf, is the coal with the lowest coal degree, namely the most original state of the coal, is formed by incomplete decomposition and accumulation of residues of swamp plants under the condition of much water, therefore, the peat contains a large amount of water, the water in the peat is easy to agglomerate in the transportation process, the water in the peat is not easy to discharge, the phenomenon of blockage of the feeding of a coal conveying system caused by accumulation of the peat is caused on the non-vertical surface in a coal conveying system, particularly in a coal hopper, the water in the coal is more, the heating efficiency of a boiler is influenced, the power generation load of the boiler is reduced instantaneously, and the allocation of the power load of the power transmission and distribution system is seriously influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to solve the technical problems that: the coal crushing anti-blocking device not only can crush coal blocks and thermally dry coal materials, but also is convenient for scraping and loosening the coal materials and is beneficial to coal feeding.

In order to solve the technical problems, the utility model adopts a technical scheme that: the coal crushing anti-blocking device comprises a coal hopper, a coal crushing mechanism arranged at the upper end of the coal hopper and a tensioning driving mechanism for driving the coal crushing mechanism to operate so as to crush coal blocks, wherein the coal hopper comprises an inner cavity and a shell covering the outer side of the inner cavity, a cavity communicated with an air preheater is formed between the shell and the inner cavity, a transmission shaft is rotatably arranged in the inner cavity, and a coal scraping mechanism and a coal conveying assembly are arranged on the transmission shaft; the coal crushing mechanism comprises a plurality of groups of crushing mechanisms, each group of crushing mechanisms comprises a first crushing unit and a second crushing unit which rotate in opposite directions to be matched with crushing, and a heat drying channel for transmitting heat media is arranged in each of the first crushing unit and the second crushing unit; during the use, the coal material that is smashed by the coal crushing mechanism falls into the coal scuttle after preheating, and the air preheater provides steam for the cavity, makes the deposited coal in the inner chamber intensify and discharge the aqueous vapor that adheres to, the coal scraping mechanism is used for striking off the deposited coal piece that adheres to on the inner wall of inner chamber and stirs the deposited coal in the inner chamber simultaneously to remove from the discharge gate of inner chamber fast under the drive of coal feeding subassembly.

By adopting the structure, each group of crushing mechanism comprises two crushing units, the two crushing units are driven by two rotating shafts which rotate relatively and crush coal blocks, and meanwhile, a heat drying channel for a heat supply medium to pass through is formed in the rotating shafts, so that the rotating shafts can heat and dry the coal blocks while rotating and crushing the coal blocks, and the path extension structure is used for prolonging the passing time of the heat medium in the heat drying channel and saving heat energy while improving the heat exchange efficiency; the tensioning driving mechanisms are arranged at the two ends of the crushing mechanism, so that the problem of synchronization of power at the two ends of the mechanism is solved, meanwhile, the damage of abrupt torque to the transmission mechanism caused by impact load is overcome, and the transmission stability is ensured; the air preheater provides heated air to a cavity formed between the shell and the inner cavity, so that the wall of the inner cavity is heated, the coal is heated, the moisture in the coal is volatilized, and the aim of drying the coal is fulfilled; the coal scraping mechanism is driven by the rotation of the transmission shaft to synchronously drive the coal scraping mechanism and the coal conveying assembly to rotate, the coal scraping mechanism scrapes the coal attached to the inner side wall of the coal hopper and simultaneously stirs accumulated coal in the coal hopper, the accumulation state of the accumulated coal is relaxed, and the coal conveying resistance is reduced, so that the coal is quickly moved out of the discharge hole of the coal hopper under the drive of the coal conveying assembly, and the coal scraping mechanism is simple and compact in structure and convenient to operate.

The beneficial effects are that: the crushing mechanism with the rotating shaft is arranged, so that the purpose of crushing coal and preheating can be realized, and the tensioning driving mechanism ensures the stability of the transmission of the rotating shaft; the coal hopper with the cavity, the coal scraping mechanism and the coal conveying assembly are arranged, so that not only can the dry coal materials be heated, but also the coal blocks attached in the coal hopper can be scraped, and meanwhile, accumulated coal in the coal hopper is stirred loose, and the coal materials are quickly moved out under the driving of the coal conveying assembly, and the coal conveying device is simple and practical in structure and convenient to operate.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 3 is a schematic structural view of the first pulverizing mechanism.

FIG. 4 is a schematic flow diagram of a thermal medium during use of the present utility model.

Fig. 5 is a schematic view of the first through plate, the first air flow disturbance plate, the second air flow disturbance plate, and the like.

Fig. 6 is a schematic structural view of the first pulverizing unit and the second pulverizing unit.

FIG. 7 is a schematic diagram of the coal pulverizing process of the present utility model.

Fig. 8 is a schematic structural view of a first tension transmission assembly.

Fig. 9 is a schematic view of a partial structure at a in fig. 2.

Fig. 10 is a schematic view of a partial structure at B in fig. 2.

Fig. 11 is a schematic structural view of the tensioning assembly.

Fig. 12 is a schematic view of the mounting structure of the inner cavity.

FIG. 13 is a schematic illustration of the flow of gas at the location of the mixing hood.

Fig. 14 is a schematic view of the structure of the coal scraping device and the coal feeding assembly.

Fig. 15 is an enlarged view at C in fig. 14.

The meaning of the reference numerals in the drawings are:

the first pulverizing unit 1, the first rotating shaft 11, the first positive oblique blades 12, the first negative oblique blades 13, the first fins 14, the first pulverizing teeth 15, the first pulverizing grooves 16, the first pulverizing space 17, the first heat drying passage 18, the first path extension structure 19, the first through plate 191, the first perforations 192, the first air flow disturbance piece 193, the second air flow disturbance piece 194;

the second pulverizing unit 2, the second rotating shaft 21, the second positive oblique blades 22, the second negative oblique blades 23, the second fins 24, the second pulverizing teeth 25, the second pulverizing grooves 26, the second pulverizing space 27, the second heat drying passage 28, and the second path extending structure 29;

the first bracket 3, the first base 31, the first support column 32, the first support 33, the first boss 34, the first mounting seat 35, the second boss 36, the second mounting seat 37 and the second bracket 4;

the first tension transmission assembly 5, the first drive assembly 51, the first motor 510, the first primary drive wheel 511, the first secondary drive wheel 512, the first drive belt 513, the first spacing protrusion 514, the second spacing protrusion 515, the first outer gear ring 516, the second outer gear ring 517, the first driving gear 518, the first driven gear 519, the second drive assembly 52, the second motor 520, the second primary drive wheel 521, the second secondary drive wheel 522, the second drive belt 523, the third spacing protrusion 524, the fourth spacing protrusion 525, the third outer gear ring 526, the fourth outer gear ring 527, the second driving gear 528, the second driven gear 529;

The tensioning assembly 53, the support base 531, the first moving member 532, the first slider 5321, the first tensioning wheel 5322, the first fixing piece 5323, the first vertical plate 5324, the first support piece 5325, the first mounting end 5326, the fifth limiting protrusion 5327, the second moving member 533, the second slider 5331, the second tensioning wheel 5332, the second fixing piece 5333, the second vertical plate 5334, the second support piece 5335, the second mounting end 5336, the sixth limiting protrusion 5337, the chute 534, the rotating lever 535, the third motor 536;

cavity 61, inner cavity 610, heat absorbing sheet 6101, bracket 6102, power motor 6103, service passage 6104, sealing gate 6105, shell 611, auger blade 612, drive shaft 613;

an air inlet pipe 620, an air pipe 6201, a hot air pipe 6202, a thermometer 6203 and an air outlet pipe 621;

base 63, strut 630, scraper 631, transition ramp 6311, connecting rod 632, first flap 633, second flap 634, cutting edge ramp 6341, relief ramp 6342.

Detailed Description

As shown in fig. 1 to 15, the present utility model comprises a coal hopper, a coal crushing mechanism arranged at the upper end of the coal hopper, and a tension driving mechanism for driving the coal crushing mechanism to operate to crush coal, wherein the coal hopper comprises an inner cavity 610 and a shell 611 covering the outer side of the inner cavity 610, a cavity 61 communicated with an air preheater (not shown) is formed between the shell 611 and the inner cavity 610, a transmission shaft 613 is rotatably arranged in the inner cavity 610, and a coal scraping mechanism and a coal feeding assembly are arranged on the transmission shaft 613; the coal crushing mechanism comprises a plurality of groups of crushing mechanisms, each group of crushing mechanisms comprises a first crushing unit 1 and a second crushing unit 2 which rotate in opposite directions to be matched with each other for crushing, and a heat drying channel for transmitting heat media is arranged in each of the first crushing unit 1 and the second crushing unit 2; during use, coal crushed by the coal crushing mechanism falls into the coal hopper after being preheated, the air preheater provides hot air for the cavity 61, so that accumulated coal in the inner cavity 610 is heated and attached water vapor is discharged, and the coal scraping mechanism is used for scraping off coal blocks attached to the inner side wall of the inner cavity and stirring loose the accumulated coal in the inner cavity 610 at the same time so as to be quickly moved out of a discharge hole of the inner cavity 610 under the drive of the coal conveying component.

Specifically, as shown in fig. 2 and 3, the pulverizing mechanisms are defined as two groups, which are a first pulverizing mechanism and a second pulverizing mechanism that are located on the same horizontal plane and are adjacently disposed, respectively. The first crushing mechanism comprises a first crushing unit 1 and a second crushing unit 2 which can rotate in opposite directions to be matched with crushing, the first crushing unit 1 comprises a first rotating shaft 11 and a first crushing part arranged on the first rotating shaft 11, the second crushing unit 2 comprises a second rotating shaft 21 and a second crushing part arranged on the second rotating shaft 21, and the first rotating shaft 11 and the second rotating shaft 21 can rotate in opposite directions to drive the first crushing part and the second crushing part to rotate in opposite directions to crush and crush coal.

The first crushing portion comprises a plurality of first blades uniformly distributed on the first rotating shaft 11 at intervals along the length direction of the first rotating shaft 11, and each first blade is arranged around the periphery of the first rotating shaft 11. The first blades are divided into two groups to form two groups of first blades with the same number, and the two groups of first blades are arranged at two sections of the first rotating shaft 11 by taking the perpendicular bisectors of the first rotating shaft 11 as demarcation points; wherein, a group of first blades positioned at the left side of the perpendicular bisector are defined as first positive oblique blades 12, and a plurality of first positive oblique blades 12 are connected end to form a first positive helical blade; the first blades positioned on the right side of the perpendicular bisector are defined as first reverse inclined blades 13, and a plurality of first reverse inclined blades 13 are connected end to form first reverse spiral blades with the spiral direction opposite to that of the first positive spiral blades.

Each of the first positive oblique blades 12 and the first negative oblique blades 13 have a plurality of first fins 14 uniformly spaced from the outer periphery thereof, and each of the first fins 14 is formed by extending the outer edge of the corresponding first positive oblique blade 12 or the corresponding first negative oblique blade 13 outwardly in the respective radial direction. Each first fin 14 is provided with a first crushing tooth 15, and a plurality of first crushing teeth 15 arranged on the first positive oblique blade 12 are formed by extending corresponding outer edge of the first fin 14 along the axial direction away from the first negative oblique blade 13, and a plurality of first crushing teeth 15 arranged on the first negative oblique blade 13 are formed by extending corresponding outer edge of the first fin 14 along the axial direction away from the first positive oblique blade 12. A first crushing groove 16 is formed between every two adjacent first crushing teeth 15. Each of the first blades, the first fins 14 and the first crushing teeth 15 are enclosed to form a first crushing space 17 which is half-enclosed.

Referring to fig. 4 to 6, the first rotary shaft 11 has a first heat drying passage 18 penetrating along an axial direction thereof and for transferring a heat medium, and the first heat drying passage 18 is defined as a cylindrical hollow passage. The first heat drying channel 18 is internally provided with a first path extension structure 19 for extending the heat medium transmission path. The first path extension structure 19 includes a first perforated plate 191 disposed therein along the length direction of the first thermal drying channel 18, a plurality of first air flow disturbance portions and a plurality of second air flow disturbance portions disposed on the first perforated plate 191. The width of the first through-plate 191 is matched with the inner diameter of the first thermal drying channel 18 so as to be clamped inside the first thermal drying channel 18. The first perforated plate 191 is provided with a plurality of first perforations 192 distributed along the length direction thereof, a plurality of first perforations 192 penetrate through the first perforated plate 191 along the thickness direction of the first perforated plate 191, and a plurality of first perforations 192 are semicircular holes matched with the inner diameter of the first thermal drying channel 18 and are uniformly distributed on the first perforated plate 191 at intervals.

The plurality of first air flow disturbance parts are defined as a plurality of first air flow disturbance plates 193 which are uniformly spaced along the length direction of the first through plate 191, the plurality of first air flow disturbance plates 193 are each semicircular plates which are matched with the inner diameter of the first heat drying tunnel 18, each of the plurality of first air flow disturbance plates 193 is vertically provided on a first side surface of the first through plate 191 along the thickness direction of the first through plate 191, and each of the first air flow disturbance plates 193 is adjacent to a corresponding odd number of first through holes 192 along the conveying direction of the heat medium and is located on a rear side of the corresponding first through holes 192 (in the illustrated embodiment, the front side and the rear side are along the conveying direction of the heat medium, namely, the inlet end close to the first heat drying tunnel 18 is defined as the front side, and the outlet end is defined as the rear side). The first air flow disturbance plate 193 and the corresponding odd number first perforations 192 are formed by tearing the second side to the first side of the first perforated plate 191.

The plurality of second air flow disturbance parts are defined as a plurality of second air flow disturbance plates 194 uniformly spaced along the length direction of the first through plate 191, the plurality of second air flow disturbance plates 194 are semicircular plates matched with the inner diameter of the first thermal drying channel 18, each second air flow disturbance plate 194 is vertically arranged on the second side surface of the first through plate 191 along the thickness direction of the first through plate 191, each second air flow disturbance plate 194 is adjacent to the corresponding even number of first through holes 192 along the transmission direction of the thermal medium and is positioned at the rear side of the corresponding first through holes 192, and the plurality of second air flow disturbance plates 194 and the plurality of first air flow disturbance plates 193 are staggered along the length direction of the first through plate 191, namely, each first air flow disturbance plate 193 is opposite to the interval between the corresponding two second air flow disturbance plates 194, and each second air flow disturbance plate 194 is opposite to the interval between the corresponding two first air flow disturbance plates 193. The second air flow disruption piece 194 and the corresponding even number of first perforations 192 are formed by tearing the first side to the second side of the first perforated plate 191.

The second crushing portion includes a plurality of second blades uniformly spaced apart from each other along the length direction of the second rotating shaft 21 on the second rotating shaft 21, and each of the second blades is disposed around the outer periphery of the second rotating shaft 21. Referring to fig. 6 and 7, a plurality of the second blades and a plurality of the first blades are disposed in pairs one by one to form a pair of crushing blades, each pair of crushing blades is aligned, the first blades and the second blades are staggered along the length direction of the first rotating shaft 11/the second rotating shaft 21, and when the first blades and the second blades rotate around the respective rotating shafts in opposite directions, the projections of the first crushing teeth 15 and the second crushing teeth 25 in the length direction are at least partially dislocated. The second blades are divided into two groups to form two groups of second blades with the same number, and the two groups of second blades are respectively arranged at two sections of the second rotating shaft 21 by taking the perpendicular bisectors of the second rotating shaft 21 as demarcation points; wherein, a group of second blades positioned at the left side of the perpendicular bisector are defined as second positive oblique blades 22, and a plurality of second positive oblique blades 22 are connected end to form a spiral second positive spiral blade; the set of second blades positioned on the right side of the perpendicular bisector is defined as second reverse inclined blades 23, and a plurality of second reverse inclined blades 23 are connected end to form second reverse spiral blades with the spiral direction opposite to that of the second positive spiral blades.

A plurality of second fins 24 are uniformly spaced on the outer periphery of each of the second positive oblique blades 22 and the second negative oblique blades 23, and each of the second fins 24 is formed by extending the outer edge of the corresponding second positive oblique blade 22 or the second negative oblique blade 23 outwards along the respective radial direction. Each second fin 24 is provided with a second crushing tooth 25, and a plurality of second crushing teeth 25 arranged on the second positive oblique blade 22 are formed by extending the outer edge of the corresponding second fin 24 along the axial direction towards the direction close to the second positive oblique blade 22, and a plurality of second crushing teeth 25 arranged on the second positive oblique blade 23 are formed by extending the outer edge of the corresponding second fin 24 along the axial direction towards the direction close to the second positive oblique blade 22. A second crushing groove 26 is formed between every two adjacent second crushing teeth 25. Each of the second blades, the second fins 24 and the second crushing teeth 25 are surrounded to form a second crushing space 27 which is half-surrounded, and the second crushing space 27 is arranged opposite to the first crushing space 17 in the axial direction.

The second rotary shaft 21 has a second heat drying passage 28 penetrating in an axial direction thereof and for transferring a heat medium therein, and the second heat drying passage 28 is defined as a cylindrical hollow passage. The second heat drying passage 28 is provided therein with a second path extending structure 29 for extending a heat medium transmission path. The second path extension structure 29 and the first path extension structure 19 have the same structure and principle, and thus are not described herein.

The second crushing mechanism comprises a third crushing unit and a fourth crushing unit which can rotate in opposite directions to be matched with crushing, the third crushing unit comprises a third rotating shaft and a third crushing part arranged on the third rotating shaft, and the fourth crushing unit comprises a fourth rotating shaft and a fourth crushing part arranged on the fourth rotating shaft. The structural arrangement and the cooperation between the two pulverizing units are the same as those of the first pulverizing unit 1 and the second pulverizing unit 2, so that the description thereof is omitted.

The tensioning driving mechanism comprises a bracket and a tensioning transmission assembly arranged on the bracket, the bracket comprises a first bracket 3 arranged at the right end of the coal crushing mechanism and a second bracket 4 arranged at the left end of the coal crushing mechanism, and the tensioning transmission assembly comprises a first tensioning transmission assembly 5 arranged on the first bracket 3 and a second tensioning transmission assembly arranged on the second bracket 4.

The first bracket 3 includes a first base 31, a first support column 32 disposed on an upper end surface of the first base 31, and a first support 33 disposed on upper end surfaces of the two first support columns 32. The first base 31 is disposed along a width direction of the first crushing mechanism, the two first support columns 32 are disposed along a width direction of the first base 31 and are respectively located at two lateral sides of the first base 31, and the first support 33 is horizontally disposed on upper end surfaces of the two first support columns 32 along a length direction of the first base 31. The first bracket 3 further comprises a first boss 34 and a first mount 35 for mounting the first tension transmission assembly 5 and a second boss 36 and a second mount 37 for mounting the second tension transmission assembly. The first boss 34 and the second boss 36 are disposed on the upper end surface of the first base 31 and are disposed on two lateral sides of the first base 31, and the first boss 34 and the second boss 36 are disposed along the length direction of the first base 31. The first mounting seat 35 and the second mounting seat 37 are disposed on the upper end surface of the first support 33 and are respectively located at positions corresponding to the first boss 34 and the second boss 36, and the first mounting seat 35 and the second mounting seat 37 are disposed along the length direction of the first support 33. The first mounting seat 35 is located between the first rotating shaft 11 and the second rotating shaft 21, and the second mounting seat 37 is located between the third rotating shaft and the fourth rotating shaft.

Referring to fig. 8 to 11, the first tensioning transmission assembly includes a first driving assembly 51, a second driving assembly 52, and a tensioning assembly 53 disposed between the first driving assembly 51 and the second driving assembly 52 for tensioning the first crushing mechanism and the second crushing mechanism.

The first driving assembly 51 is in transmission connection with the right ends of the first rotating shaft 11 and the second rotating shaft 21, and includes a first motor 510 installed on the left side of the first boss 34, and a first transmission structure for transmitting the power of the first motor 510 to the first rotating shaft 11 and the second rotating shaft 21. The first transmission structure comprises a first belt pulley assembly arranged on one side of the first convex seat 34 and the first mounting seat 35, and a first transmission gear assembly arranged on the other side of the first mounting seat 35. The first pulley assembly includes a first main driving wheel 511 provided at a side (i.e., right side) of the first boss 34 away from the first motor 510, a first secondary driving wheel 512 provided at a right side of the first mount 35, and a first driving belt 513 provided around the first main driving wheel 511 and the first secondary driving wheel 512 to drivingly connect the two. The first main driving wheel 511 is coaxially arranged with the first motor 510 and can rotate around its own axis, and the first sub driving wheel 512 is rotatably arranged on the right side of the first mounting seat 35 and can rotate around its own axis. The inner peripheral surface of the first transmission belt 513 is provided with a plurality of first limiting protrusions 514, and the corresponding positions of the side walls of the first main transmission wheel 511 and the first auxiliary transmission wheel 512 are provided with second limiting protrusions 515 in a limiting fit with the plurality of first limiting protrusions 514. The first gear assembly includes a first driving gear 518 and a first driven gear 519 disposed on the left side of the first mounting seat 35 and engaged with each other. The first driving gear 518 is coaxially disposed with the first slave driving wheel 512 and is in transmission connection therewith, and the first driving gear 518 can rotate around its own axis under the driving of the first slave driving wheel 512. The first driven gear 519 is the same size and number of teeth as the first driving gear 518 and is disposed on the same horizontal plane as the first driving gear 518. The first rotary shaft 11 is provided with a first external gear ring 516 engaged with the first driving gear 518 at a position corresponding to the first driving gear 518, and the second rotary shaft 21 is provided with a second external gear ring 517 engaged with the first driven gear 519 at a position corresponding to the second driven gear 519.

The second driving assembly 52 is in transmission connection with the right ends of the third rotating shaft and the fourth rotating shaft, and comprises a second motor 520 arranged on the left side of the second boss 36 and a second transmission structure for transmitting the power of the second motor 520 to the third rotating shaft and the fourth rotating shaft. The second transmission structure comprises a second belt pulley assembly arranged on one side of the second convex seat 36 and the second mounting seat 37, and a second transmission gear assembly arranged on the other side of the second mounting seat 37. The second pulley assembly includes a second main driving wheel 521 provided at a side (i.e., right side) of the second boss 36 remote from the second motor 520, a second sub driving wheel 522 provided at a right side of the second mount 37, and a second driving belt 523 provided around the outer circumferences of the second main driving wheel 521 and the second sub driving wheel 522 to drivingly connect the two. The second main driving wheel 521 is coaxially arranged with the second motor 520 and can rotate around its own axis, and the second secondary driving wheel 522 is rotatably arranged on the right side of the second mounting seat 37 and can rotate around its own axis. The inner peripheral surface of the second driving belt 523 is provided with a plurality of third limiting protrusions 524, and corresponding positions of the side walls of the second main driving wheel 521 and the second auxiliary driving wheel 522 are provided with fourth limiting protrusions 525 in limiting fit with the third limiting protrusions 524. The second gear assembly includes a second driving gear 528 and a second driven gear 529 disposed on the left side of the second mounting base 37 and engaged with each other. The second driving gear 528 is coaxially disposed with the second slave driving wheel 522 and is in transmission connection with the second slave driving wheel 522, and the second driving gear 528 can rotate around its own axis under the driving of the second slave driving wheel 522. The second driven gear 529 has the same size and number of teeth as the second driving gear 528 and is disposed on the same horizontal plane as the second driving gear 528. The third rotating shaft is provided with a third external gear ring 526 in meshed fit with the second driving gear 528 at a position corresponding to the second driving gear 528, and the fourth rotating shaft is provided with a fourth external gear ring 527 in meshed fit with the fourth rotating shaft at a position corresponding to the second driven gear 529.

The tensioning assembly 53 includes a supporting seat 531 disposed on an upper end surface of the first base 31 along a length direction of the first base 31, a first moving member 532 and a second moving member 533 slidably disposed in the supporting seat 531, and a power assembly for driving the first moving member 532 and the second moving member 533 to move in opposite directions. The supporting seat 531 is located at a position between the first boss 34 and the second boss 36, a sliding slot 534 is formed at an upper end of the supporting seat 534 for sliding the first moving member 532 and the second moving member 533, and the sliding slot 534 extends along an upper side and two lateral sides of the supporting seat 531 to penetrate the supporting seat 531. The power assembly includes a rotating rod 535 rotatably fitted therein along the length of the chute 534 and a power member for driving the rotating rod 535 to rotate about its own axis. Two thread segments with opposite thread directions are respectively arranged at the two transverse ends of the rotating rod 535, the power piece is defined as a third motor 536, the third motor 536 is arranged on one side of the supporting seat 531 close to the first convex seat 34, and an output shaft of the third motor 536 is in transmission connection with the rotating rod 535.

The first moving member 532 includes a first slider 5321 screwed with the thread section near the first driving assembly, a first carriage provided on an upper end surface of the first slider 5321, and a first tension pulley 5322 provided on an end portion of the first carriage. The first slider 5321 is matched with the chute 534, and the first carriage includes a first vertical portion disposed on an upper end surface of the first slider 5321 and a first horizontal portion formed by extending from the first vertical portion to the first transmission belt 513. The first vertical portion includes a first fixing piece 5323 fixedly arranged on an upper end surface of the first slider 5321, and first vertical plates 5324 oppositely arranged on two lateral sides of the first fixing piece 5323. The first horizontal portion includes two first support pieces 5325 disposed along a length direction of the support base 531, the two first support pieces 5325 are disposed on opposite sides of the two first vertical plates 5324 and are parallel to each other, and a distance between the two first support pieces 5325 is matched with a width of the first transmission belt 513. The cross-sectional dimensions of the two first supporting plates 5325 gradually decrease from being far away from the first driving belt 513 to being close to the first driving belt 513 and form a first mounting end 5326, the first tensioning wheel 5322 is rotatably mounted between the two first mounting ends 5326 and is abutted to the inner side of the first driving belt 513, and a fifth limiting protrusion 5327 in limiting fit with the plurality of first limiting protrusions 514 is arranged on the outer peripheral wall of the contact between the first tensioning wheel 5322 and the first driving belt 513.

The second moving member 533 includes a second slider 5331 screwed to the threaded section near the second driving assembly, a second carriage provided on an upper end surface of the second slider 5331, and a second tensioning wheel 5332 provided on an end portion of the second carriage. The second slider 5331 is matched with the chute 534, and the second carriage includes a second vertical portion disposed on an upper end surface of the second slider 5331 and a second horizontal portion formed by extending the second vertical portion toward the second driving belt 523. The second vertical portion includes a second fixing piece 5333 fixedly arranged on the upper end surface of the second slider 5331 and second vertical plates 5334 oppositely arranged on two lateral sides of the first fixing piece 5323. The second horizontal portion includes two second supporting pieces 5335 disposed along a length direction of the supporting seat 531, the two second supporting pieces 5335 are disposed on opposite sides of the two second vertical plates 5334 and are parallel to each other, and a distance between the two second supporting pieces 5335 is matched with a width of the second driving belt 523. The cross-sectional dimensions of the two second supporting pieces 5335 gradually decrease from being far away from the second driving belt 523 to being close to the second driving belt 523 and form a second mounting end 5336, the second tensioning wheel 5332 is rotatably mounted between the two second mounting ends 5336 and is abutted to the inner side of the second driving belt 523, and a sixth limiting protrusion 5337 in limiting fit with the third limiting protrusions 524 is arranged on the outer peripheral wall of the contact between the second tensioning wheel 5332 and the second driving belt 523.

The structural arrangement and the working principle of the second bracket 4 and the first bracket 3 are the same, and the structural arrangement and the working principle of the second tensioning transmission assembly and the first tensioning transmission assembly 5 are the same, so that the description is omitted.

The heat absorbing sheet 6101 extending outwards is spirally disposed on the outer side wall of the inner cavity 610 along the axial direction of the inner cavity 610, the extending ends of the heat absorbing sheet 6101 are all abutted with the inner side wall of the shell 611, and the heat absorbing sheet 6101, the inner cavity 610 and the shell 611 surround to form a cavity 61 spirally disposed.

An overhaul channel 6104 communicated with the inner cavity 610 is arranged in the cavity 61, an opening is communicated with the position of the shell 611 corresponding to the overhaul channel 6104, and a sealing door 6105 is arranged at the position of the opening;

an air inlet pipe 620 communicated with the cavity 61 is arranged on one side of the shell 611, an air outlet pipe 621 communicated with the cavity 61 is arranged on the other side of the shell 611, an air pipe 6201 is arranged on one side of an air inlet end of the air inlet pipe 620, a hot air pipe 6202 communicated with the air preheater is arranged on the other side of the shell 620, a mixing cover 622 is arranged in the air inlet pipe 620 at a position corresponding to the air inlet junction of the air pipe 6201 and the hot air pipe 6202, the cross section of the mixing cover 622 is of a U-shaped structure, and the opening direction of the mixing cover 622 is the same as the air inlet direction of the air inlet pipe 620.

A bracket 6102 is arranged on the inner side wall of the discharge port of the inner cavity 610, a power motor 6103 is arranged on the bracket 6102, and the output end of the power motor 6103 extends vertically upwards and is connected with a transmission shaft 613.

The coal feeding assembly comprises at least two auger blades 612 spirally arranged on the outer side wall of the connecting shaft 613 along the axial direction of the connecting shaft 613, and the blade width of each auger blade 612 is of a structure with a wide upper part and a narrow lower part.

The coal scraping mechanism comprises a base 63 sleeved on a connecting shaft 613, a supporting rod 630 connected with the base 63 and a scraping plate 631 obliquely connected with the supporting rod 630, a connecting rod group is connected between the scraping plate 631 and the connecting shaft 610 and comprises three connecting rods 632 which are arranged in parallel from top to bottom at equal intervals, and the distance between two connecting ends of each connecting rod 632 is reduced along the axial equal interval of the obliquely arranged scraping plate 631.

Each connecting rod 632 is a curved arrangement and each connecting rod 632 is a curved diameter with a distance between two connecting ends.

The supporting rod 630 and the scraping plate 631 are of an integrated structure, and a section of transition inclined plane 6311 is arranged at one side of the high end of the scraping plate 631 corresponding to the inner side wall of the coal bucket.

A first baffle 633 and a second baffle 634 are respectively arranged along the edges of the left side and the right side of the supporting rod 630 and the scraping plate 631 in the axial direction, and the baffles on the two sides and the outer side walls of the supporting rod 630 and the scraping plate 631 are surrounded to form a communicated L-shaped groove; one side of the second baffle 34, which is abutted against the inner wall of the coal bucket, is provided with an outer low and inner high cutting edge inclined plane 6341, and the other side is provided with a yielding inclined plane 6342 which is flush with the plane of the outer side wall of the transition inclined plane 6311.

The application principle of the utility model is as follows:

as shown in fig. 1 to 11, when the coal crushing mechanism is required to crush coal, the first tensioning transmission assembly 5 and the second tensioning transmission assembly are required to be started to drive the coal crushing mechanism to operate.

Taking the first driving assembly 51 in the first tensioning transmission assembly 5 as an example, the first motor 510 is started, the first motor 510 drives the first main driving wheel 511 to rotate, the first main driving wheel 511 drives the first secondary driving wheel 512 to rotate through the first transmission belt 513, so that the first secondary driving wheel 512 drives the first driving gear 518 to rotate, the first driving gear 518 drives the first rotating shaft 11 to rotate through the first outer gear ring 516, and simultaneously drives the second rotating shaft 21 to rotate in a direction opposite to the first rotating shaft 11 through the first driven gear 519 and the second outer gear ring 517. The second motor 520 is started to drive the third rotating shaft and the fourth rotating shaft to rotate oppositely through the second transmission structure in the same steps as the above.

The coal to be crushed is thrown into the space between the first crushing unit 1 and the second crushing unit 2, the coal blocks can fall into the first crushing space 17 and the second crushing space 27, the first rotating shaft 11 drives the first positive helical blade to rotate, the first positive helical blade and the first negative helical blade drive the first fin 14 and the first crushing tooth 15 to rotate in the same direction, the second positive helical blade and the second negative helical blade drive the second fin 24 and the second crushing tooth 25 to rotate in the same direction, the first fin 14 and the first crushing tooth 15 are embedded into the corresponding pitch space of the second crushing part and are opposite to the second rotating shaft 21, and the second fin 24 and the second crushing tooth 25 are embedded into the corresponding pitch space of the first crushing part and are opposite to the first rotating shaft 11, so that the coal blocks are crushed by extrusion. Simultaneously, the spiral first positive spiral blade, the spiral first negative spiral blade, the spiral second positive spiral blade and the spiral second negative spiral blade also have the function of pushing the crushed coal blocks to the middle parts of the first rotating shaft 11 and the second rotating shaft 21, so that the coal blocks can be conveniently conveyed to the next link.

Meanwhile, the heat medium is introduced from the right end of the first heat drying channel 18, and after entering the first heat drying channel 18, the heat medium circulates from the first side to the second side of the first through plate 191 to the first side under the shielding of the first air flow disturbance plate 193 and the second air flow disturbance plate 194, passes through a plurality of first through holes 192 in sequence, and is led out from the left side of the first heat drying channel 18. The first fins 14 and the first crushing teeth 15 are power points for tearing and extruding the lump coal and are heat dissipation surfaces for heat exchange, so that the path time of the high-temperature air flow tissue in the first heat drying channel 18 can be effectively prolonged, and the heat exchange efficiency is improved. The working principle of the second path extension structure 29 is the same as that of the first path extension structure 19, so that the description thereof will be omitted.

Because the rotating shafts have certain weight and crushing coal blocks needs certain force, the transmission belt can deform along with the increase of the service time, and the friction force between the transmission belt and the corresponding main transmission wheel and the corresponding auxiliary transmission wheel is insufficient, so that the synchronous rotation of the two rotating shafts in the same crushing mechanism is influenced, and the transmission belt needs to be tensioned by the tensioning assembly 53.

The third motor 536 is started, the third motor 536 rotates to drive the rotating rod 535 to rotate, and the two sections of threads on the rotating rod 535 are opposite in direction, so that the rotating rod 535 rotates to drive the first sliding block 5321 and the second sliding block 5331 to move in opposite directions through the two sections of threads, and when the first sliding block 5321 and the second sliding block 5331 move in opposite directions, the first sliding frame and the second sliding frame drive the first tensioning wheel 5322 and the second tensioning wheel 5332 to move in opposite directions respectively, so that the first transmission belt 513 and the second transmission belt 523 are tensioned respectively. The operation of the second tension transmission assembly is the same as the operation of the first tension transmission assembly 5, and thus will not be described in detail.

Meanwhile, hot air is discharged from an air preheater (not shown) and enters the air inlet pipe 620 through the hot air pipe 6202, meanwhile, normal-temperature air is pumped from the air pipe 6201 to adjust the air temperature in the air inlet pipe 620 in combination with the requirement of using temperature, in order to improve the cooling efficiency of the mixed air, a mixing cover 622 is arranged at the air inlet junction of the air pipe 6201 and the hot air pipe 6202, as shown in fig. 13, after the hot air and the normal-temperature air entering from two ends enter the air inlet pipe 620, a little mixing is performed, more air bounces are generated, the air bounces bounce and the positions of the air inlet ends respectively, the air bounces respectively, the air flows along the pipe wall of the corresponding end of the air inlet pipe 620 and the outer side wall of the mixing cover 622 under the action of the air pressure of the corresponding end, when the hot air and the normal-temperature air flow to the opening position of the mixing cover 622, the air at two ends can flow into the structure with the cross section of the mixing cover 622 of U-shaped, and the temperature meter 6203 is arranged at the position of the air inlet pipe 620 corresponding to the mixing cover 622 for accurately knowing the air temperature after the mixing; the fully mixed gas is continuously discharged into the cavity 61 through the air inlet pipe 620 under the action of air pressure, and the temperature is transferred to the inner cavity 610 through the heat transfer piece 6101 by the heat transfer of the air, so as to achieve the purpose of heating peat in the inner cavity 610, and the purpose of drying coal is achieved by volatilizing water vapor in the peat by heating.

As shown in fig. 1, 12, 14 and 15, after a great amount of peat enters the coal bucket, because the lower structure of the coal bucket contains non-vertical surfaces and the peat contains moisture, the phenomenon that the peat is stacked easily on the non-vertical surfaces is easy, at this time, the power motor 6103 is started to synchronously drive the connecting shaft 613 and the sleeved base 63 to rotate, that is, the scraper 631 synchronously rotates along with the rotation of the base 63, and the scraper 631 is provided with the cutting edge inclined surface 6341 in the rotation direction, so that rapid coal scraping is facilitated, meanwhile, the contact area between the scraper 631 and the inner side wall of the coal bucket is reduced due to the arrangement of the yielding inclined surface 6342, the resistance of coal scraping is reduced, and the front stress is reduced when the scraper 631 moves in the coal.

It should be noted that, three connecting rods 632 are further connected between the connecting shaft 613 and the scraper 631, the distance between the two connecting ends of each connecting rod 632 is reduced along the axial direction of the inclined scraper 631, each connecting rod 632 is curved, the distance between the two connecting ends of each connecting rod 632 is the curved diameter, the three connecting rods 632 with equal difference span are arranged from top to bottom to form a conical structure with a cross section being wider at the top and narrower at the bottom, thus, in the synchronous rotation process along with the connecting shaft 613, each connecting rod 632 moves in the coal material, a gap is generated after movement, the state of accumulated coal accumulation is changed, and the effect similar to the effect of loosening soil is achieved, so that the purpose of loosening the accumulated coal is achieved; the first baffle 633, second baffle 634 and the outer side wall of branch 630 and scraper 631 surround to form a recess of "L" shape of intercommunication, are favorable to carrying out orderly direction to the coal material of stirring pine, make the inside that the coal material is piled up more orderly, are convenient for send the coal ejection of compact.

Meanwhile, the rotation of the connecting shaft 613 synchronously drives the three auger blades 612 to rotate, the rotation direction of the auger blades 612 faces the discharge hole at the lower end of the coal hopper, and the widths of the auger blades 612 are of a structure with wide upper part and narrow lower part, so that the coal feeding is facilitated, and meanwhile, the blocking in the coal discharging direction is reduced; meanwhile, the bracket 6102 also adopts a cross-shaped structure, so that the discharge amount of the discharge port of the coal bucket is ensured to the maximum extent.

Finally, as shown in fig. 1 and 12, for easy maintenance, a maintenance hole is provided on the wall of the inner cavity 610 at the upper position corresponding to the scraping plate 631, a maintenance channel 6104 communicating with the maintenance hole is provided in the spiral cavity 61 between the outer shell 611 and the inner cavity 610, the maintenance channel 6104 is provided with an opening on the outer shell 611, and a sealing door 6105 is provided at the opening position; when in use, the sealing door 6105 is opened, a worker can access the maintenance channel 6104 to maintain Kong Weizhi and climb down the three connecting rods 632 to the inner cavity 610, thereby facilitating the temporary maintenance of related components such as the scraping plate 631 or the auger blade 612 by the worker; meanwhile, the service passage 6104 is provided at a position between the adjacent two sections of cavities to ensure smooth flow of hot air in the spiral cavity 61.

Claims (10)

1. The utility model provides a broken coal anti-blocking device which characterized in that: the coal crushing device comprises a coal hopper, a coal crushing mechanism arranged at the upper end of the coal hopper and a tensioning driving mechanism for driving the coal crushing mechanism to operate so as to crush coal blocks, wherein the coal hopper comprises an inner cavity and a shell covering the outer side of the inner cavity, a cavity communicated with an air preheater is formed between the shell and the inner cavity, a transmission shaft is rotatably arranged in the inner cavity, and a coal scraping mechanism and a coal conveying assembly are arranged on the transmission shaft; the coal crushing mechanism comprises a plurality of groups of crushing mechanisms, each group of crushing mechanisms comprises a first crushing unit and a second crushing unit which rotate in opposite directions to be matched with crushing, and a heat drying channel for transmitting heat media is arranged in each of the first crushing unit and the second crushing unit; during the use, the coal material that is smashed by the coal crushing mechanism falls into the coal scuttle after preheating, and the air preheater provides steam for the cavity, makes the deposited coal in the inner chamber intensify and discharge the aqueous vapor that adheres to, the coal scraping mechanism is used for striking off the deposited coal piece that adheres to on the inner wall of inner chamber and stirs the deposited coal in the inner chamber simultaneously to remove from the discharge gate of inner chamber fast under the drive of coal feeding subassembly.

2. A crushed coal anti-blocking device according to claim 1, wherein: the first crushing unit comprises a first rotating shaft and a first crushing part arranged on the first rotating shaft, the second crushing unit comprises a second rotating shaft and a second crushing part arranged on the second rotating shaft, and the heat drying channel is arranged in the first rotating shaft and the second rotating shaft and penetrates through the corresponding rotating shaft along the axial direction.

3. A crushed coal anti-blocking device according to claim 2, wherein: the first crushing part comprises a plurality of first blades which are uniformly and alternately distributed on the first rotating shaft along the length direction of the first rotating shaft, each first blade is arranged around the periphery of the first rotating shaft, a plurality of first crushing teeth are uniformly and alternately distributed on the periphery of the first blade, and a first crushing groove is formed between every two adjacent first crushing teeth;

the second crushing part comprises a plurality of second blades which are uniformly distributed on the second rotating shaft at intervals along the length direction of the second rotating shaft, the plurality of second blades and the plurality of first blades are arranged in pairs one by one to form crushing blade pairs, each second blade is arranged around the periphery of the second rotating shaft, a plurality of second crushing teeth are uniformly distributed on the periphery of the second blade at intervals, and a second crushing groove is formed between every two adjacent second crushing teeth;

each pair of crushing blades is centered, the first blades and the second blades are distributed in a staggered mode along the length direction, and when the first blades and the second blades rotate around respective rotating shafts in opposite directions, the first crushing teeth and the second crushing teeth are at least partially misplaced in the projection of the length direction.

4. A crushed coal anti-blocking device according to claim 2, wherein: each heat drying channel is internally provided with a path extension structure for extending a heat coal medium transmission path, the path extension structure comprises a plurality of first air flow disturbance parts which are uniformly arranged on one side of the heat drying channel at intervals along the length direction of the heat drying channel and a plurality of second air flow disturbance parts which are uniformly arranged on the other side of the heat drying channel at intervals along the length direction of the heat drying channel, and the plurality of first air flow disturbance parts and the plurality of second air flow disturbance parts are distributed in a staggered manner along the length direction of the heat drying channel.

5. A crushed coal anti-blocking device according to claim 1, wherein: the tensioning driving mechanism comprises a bracket and a tensioning transmission assembly arranged on the bracket; the support with tensioning transmission assembly is all including being located two sets of coal crushing mechanism length direction both ends, every group tensioning transmission assembly all includes and is used for the drive coal crushing mechanism moving drive assembly and is used for right drive assembly carries out tensioning.

6. A crushed coal anti-blocking device according to claim 1, wherein: the outer side wall of the inner cavity is spirally provided with an outwards extending heat absorbing sheet along the axial direction of the inner cavity, the extending ends of the heat absorbing sheet are all abutted with the inner side wall of the shell, and a cavity which is spirally arranged is formed by encircling the heat absorbing sheet, the inner cavity and the shell.

7. The crushed coal anti-blocking device according to claim 6, wherein: a bracket is arranged on the inner side wall of the discharge hole of the inner cavity, a power motor is arranged on the bracket, and the output end of the power motor extends vertically upwards and is connected with a transmission shaft; the coal conveying assembly comprises at least two auger blades which are spirally arranged on the outer side wall of the connecting shaft along the axial direction of the connecting shaft, and the blade width of each auger blade is of a structure with wide upper part and narrow lower part.

8. A crushed coal anti-blocking device according to claim 1, wherein: the coal scraping mechanism comprises a base sleeved on a connecting shaft, a supporting rod connected with the base and a scraping plate obliquely connected with the supporting rod, wherein a connecting rod group is connected between the scraping plate and the connecting shaft and comprises three connecting rods which are arranged in parallel from top to bottom at equal intervals, and the distance between two connecting ends of each connecting rod is reduced along the axial equal interval of the obliquely arranged scraping plate.

9. The crushed coal anti-blocking device according to claim 8, wherein: the edges of the left side and the right side of the supporting rod and the axial direction of the scraping plate are respectively provided with a first baffle plate and a second baffle plate, and the two sides of the baffle plates, the supporting rod and the outer side wall of the scraping plate are surrounded to form a communicated L-shaped groove.

10. The crushed coal anti-blocking device according to claim 9, wherein: one side of the second baffle, which is abutted against the inner wall of the coal bucket, is provided with an edge inclined plane with the outer side low and the inner side high, and the other side is provided with an abdication inclined plane which is flush with the plane where the outer side wall of the transition inclined plane is positioned.