CN213084803U

CN213084803U - Sleeve type self-rotating spiral unloading machine

Info

Publication number: CN213084803U
Application number: CN202020954587.0U
Authority: CN
Inventors: 高向前
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-30
Filing date: 2020-05-30
Publication date: 2021-04-30
Anticipated expiration: 2030-05-30

Abstract

A sleeve type self-revolving screw unloader comprises an outer sleeve, a screw unloading mechanism, a center driving device and a revolution driving device; the spiral discharging mechanism is positioned inside the outer sleeve; the near end of the outer sleeve is provided with a center driving device, the far end of the outer sleeve is provided with a revolution driving device, the center driving device is positioned at the center of the bottom in the storage bin, the revolution driving device is positioned at the circumferential position of the bottom of the inner wall of the storage bin, and the outer sleeve is provided with a blanking hole; utilize the rotation of outer sleeve, the distal end that will drive power is transmitted to the storage silo inner wall by central drive arrangement drives for distal end drive arrangement obtains simplifying by a wide margin, has solved the problem that traditional major diameter spiral shedding mechanism exists, has solved the clear storehouse of major diameter flat storehouse difficult problem of unloading of long-term puzzlement, makes major diameter flat storehouse technique of unloading can obtain wide application.

Description

Sleeve type self-rotating spiral unloading machine

Technical Field

The utility model belongs to flat storage silo application relates to a from gyration screw unloader, is applied to wharf, steel mill, power plant, grain depot, chemical fertilizer factory etc. and stores industry such as coal, ore, grain, chemical fertilizer, agricultural bulk cargo storage field.

Background

With the increasing of environmental protection requirements, environmental protection requirements such as closed dust suppression and the like are provided for controlling dust emission of bulk material stacking places such as wharfs, steel plants, power plants, grain depots, fertilizer plants and the like for storing coal, ore, grain, fertilizer and the like, so that a large amount of totally-closed storage technologies such as silos or spherical bins and the like are adopted at present. At present, annual storage capacity of bulk materials reaches over billions of tons of demands only domestically, and the demand of society on bulk material storage is huge.

Bulk storage mainly comprises bulk stacking and storage technologies, the bulk stacking technology is continuously developed towards the storage direction under the environment protection requirement, however, the unloading technology of the storage technology is greatly limited and mainly limited by the unloading technology, the storage capacity of a single bin is difficult to improve, and the engineering cost is huge. The storage technology at present mainly comprises a silo, a spherical silo and a circular stock ground. The materials in the silo and the spherical silo enter the storage silo in a silo top blanking mode, and the unloading process mainly comprises three process technical routes of natural discharging and mechanical discharging or natural and mechanical mixed discharging at present. The selection of the unloading technical route directly has great influence on the overall safety, reliability and cost of the storage bin. At present, a silo storage material discharging technical route generally adopts a suspended conical discharging hopper arranged at the bottom, a belt conveyor is arranged at the bottom of the discharging hopper, the whole weight of stored materials is borne by a silo structure, the structural strength design requirement is high, the structure is huge, the further improvement of the storage capacity is limited, the storage capacity of a single cylinder of 3 ten thousand tons is generally realized at home at present, if the storage capacity is further improved to 5 ten thousand tons, the structural safety and the reliability are greatly reduced, and the manufacturing cost is greatly improved; by adopting the flat-bottom bin technology, the main storage weight is directly transmitted to the foundation ground, the structural load is greatly reduced, the safety, the reliability and the storage capacity are greatly improved, and the construction cost is also greatly reduced; the problem of flat-bottom bin discharging is solved by adopting the flat-bottom bin technology, and when the traditional spiral discharging machine is applied to a large-diameter flat-bottom bin, the problems of overlarge resistance, serious abrasion and short service life exist, and long-term reliable operation cannot be guaranteed, so that the flat-bottom bin is difficult to popularize and apply. The spherical storage silo can only adopt a natural blanking process due to the fact that large-diameter mechanical unloading cannot be achieved, a plurality of belt galleries are arranged underground, construction cost is greatly increased, meanwhile, the problems of hardening shed arch and the like of materials with large viscosity cannot be solved, and fault handling is dangerous and difficult.

Therefore, a brand new technology which can realize the safe and reliable discharging requirement of the large-diameter flat-bottom bin, greatly improve the storage capacity of a single bin and reduce the construction cost is needed, and the core of the technology is to solve the problem of safe and reliable operation of the large-diameter flat-bottom bin spiral discharging mechanism.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model discloses the technique is through increasing rotatory outer sleeve on traditional screw discharging machine's basis, the anti bending ability under the major diameter has not only been improved by a wide margin, the rotational resistance of shedding mechanism in the material has been reduced by a wide margin, utilize the rotation of outer sleeve simultaneously, drive power and transmit the distal end of storage silo inner wall by central drive arrangement and drive, make distal end drive arrangement obtain simplifying by a wide margin, need not to set up huge power drive arrangement and personnel maintenance passageway, the problem that traditional major diameter screw discharging mechanism exists has been solved. The long-term puzzled problem of clearing and discharging the large-diameter flat-bottom bin is solved, so that the discharging technology of the large-diameter flat-bottom bin can be widely applied, and the social and economic benefits are remarkable.

A sleeve type self-revolving screw unloader comprises an outer sleeve, a screw unloading mechanism, a center driving device and a revolution driving device; it is characterized in that the spiral discharging mechanism is positioned inside the outer sleeve; the near end of the outer sleeve is provided with a center driving device, the far end of the outer sleeve is provided with a revolution driving device, the center driving device is positioned at the center of the bottom in the storage bin, the revolution driving device is positioned at the circumferential position of the bottom of the inner wall of the storage bin, and the outer sleeve is provided with a blanking hole.

Furthermore, the outer sleeve is provided with a plurality of blanking holes which are scattered on the sleeve, two blanking holes are formed in the axial direction and are connected end to end, and the blanking holes are arranged in a staggered mode in the outer circumferential direction.

Further, revolution drive arrangement includes speed reduction mechanism and drive gear, and the speed reduction mechanism is connected to the outer sleeve distal end, and speed reduction mechanism drives drive gear, and drive gear links to each other with the rack that arranges along storage silo inner wall bottom circumference.

Furthermore, an upper rack and a lower rack are arranged along the bottom of the inner wall of the storage bin, the distance between the upper rack and the lower rack is larger than the diameter of the driving gear, a certain working gap is reserved, and the driving gear is positioned between the upper rack and the lower rack.

Furthermore, two sets of power driving systems are arranged in the central driving device and respectively drive the outer sleeve and the spiral discharging mechanism in the central driving device, and the outer sleeve and the spiral discharging mechanism are respectively connected through a speed reducing mechanism.

Furthermore, the central driving device is provided with an upper plane stress bearing and a lower plane stress bearing, the upper part of the upper plane stress bearing is a protective cover, the lower part of the upper plane stress bearing is connected with the vertical cylinder type shell, the upper part of the lower plane stress bearing is connected with the vertical cylinder type shell, the lower part of the lower plane stress bearing is fixed with the bottom foundation of the storage bin, the power driving system is arranged on the upper plane of the lower plane stress bearing, and the vertical cylinder type shell and the power driving system revolve along with the outer sleeve.

Furthermore, the middle part or two side edges of the blanking hole along the circumferential direction are provided with a protruding scraping plate for rotary-digging materials.

Further, the upper portion of the rack is provided with a whole ring of material baffle plates surrounding the inner wall of the storage bin.

Further, the far end of the spiral discharging mechanism is connected with the far end of the outer sleeve through a bearing to support the far end point of the spiral discharging mechanism.

Furthermore, a discharge hole is arranged at the central position of the lower part of the central driving device.

Through adopting the technical scheme, the utility model provides a storage storehouse structure support promotes the effective utilization ratio in storage storehouse space by a wide margin at the position storage that sets up central gyration stacker-reclaimer to radius 32.5 m's ball storehouse is the example, and its straight section height sets up to 12.5m, total volume 113318m³By adopting the technical scheme provided by the utility model, about 75000 tons of coal can be stored, and the storage capacity is far higher than that of the prior art; and the construction cost is reduced by matching with reasonable material distribution and a dead weight blanking means of the bottom discharging groove; the built-in equipment of clearing the storehouse assists and handles inside storage trouble problem, improves application security, reliability.

Drawings

FIG. 1 is a side sectional view of a sleeve type self-revolving screw unloader;

FIG. 2 is a schematic top view of a sleeve-type self-revolving screw unloader;

FIG. 3 is a side sectional view of a central driving device of the sleeve-type self-revolving screw unloader;

FIG. 4 is a schematic side sectional view of a distal revolution driving device of the sleeve-type autorotation screw unloader;

FIG. 5 is a schematic top view of the distal revolution driving device of the sleeve-type autorotation screw unloader;

the numbers in the figures illustrate the following:

1. the device comprises an outer sleeve, 2 a spiral discharging mechanism, 3 a central driving device, 4 a driving gear, 5 an upper rack, 6 a lower rack, 7 a gear reduction box, 8 a discharging hole, 9 a material baffle plate, 10 a protective cover, 11 a lower plane pressure bearing, 12 an upper plane pressure bearing, 13 a vertical cylinder type shell, 14 a bearing, 15 a reduction box supporting wheel, 16 a material baffle plate reinforcing supporting frame, 17 an outer sleeve driving motor, 18 a spiral discharging mechanism driving motor, 19 an outer sleeve discharging hole, 20 a material scraping plate, 21 a storage bin inner wall and 22 a storage bin flat bottom.

Detailed Description

The following description of the novel sleeve type self-revolving screw unloader of the present invention is made with reference to the accompanying drawings, so as to help understanding the contents of the present invention.

The silo for storing coal is described below as an example.

As shown in fig. 1 and 2, a sleeve-type self-revolving screw unloader is arranged at the bottom in the storage bin, the near end of the sleeve-type self-revolving screw unloader is positioned at the center of the storage bin, the far end is positioned at the circumference of the inner wall of the storage bin, and the far end revolves along the inner wall of the storage bin by a driving mechanism.

The sleeve type autorotation spiral unloader comprises an outer sleeve 1, a spiral unloading mechanism 2, a central driving device 3 and a far-end revolution driving device consisting of a driving gear 4, an upper rack 5, a lower rack 6 and a gear reduction box 7.

The sleeve type self-revolving screw unloader is provided with a built-in screw unloading mechanism 2, the outside of the screw unloading mechanism is provided with a rotary outer sleeve 1, and the outer sleeve consists of one or more layers of wear-resistant steel cylinders. The sleeve type autorotation spiral unloading machine revolves around the circumference of the bottom of the inner wall of the storage bin, the outer rotating sleeve drives the speed reducing mechanism and the driving gear at the far end to drive, the driving force is on the inner wall of the storage bin, compared with the mode that the rotating mechanism is driven to revolve at the central part of the storage bin in the prior art, the driving mechanism is arranged at the far end of the periphery, the driving force arm is greatly increased, the requirement on the driving force is greatly reduced, and the requirements on the mechanical strength and the driving power of the whole rotating mechanism are greatly reduced.

The outer sleeve 1 is provided with a blanking hole for dropping the material outside the sleeve into the sleeve in a rotary digging mode. The blanking holes are scattered on the sleeve, continuous blanking holes are formed in the axial direction, staggered arrangement is carried out in the circumferential direction, continuous through holes cannot be formed while the blanking is continuously carried out in the axial direction in a rotary digging mode, and the integral rigidity strength of the sleeve is guaranteed. For example, each blanking hole is 1000-2000mm in axial dimension, the width is 200mm, two separated holes are staggered by 90 degrees along the outer wall of the sleeve at the outer circumference, and meanwhile, two blanking holes are axially connected end to form an axially intermittent and complete 200mm wide blanking hole belt, so that the material is ensured to fall in the axial direction without dead angle, and meanwhile, the outer cylinder structure is ensured not to have overlong open hole belt breakage to influence the structural strength of the outer cylinder. The specific size of the blanking hole can be adjusted according to the material characteristics and the output requirement.

Each blanking hole on the outer sleeve is rotated, and a protruded wear-resistant rack-shaped scraping plate for rotary excavating materials is arranged on the middle part or two side edges in the circumferential direction, so that the rotary excavating device can ensure that the rotary excavating materials can smoothly fall into the blanking holes of the sleeve no matter the sleeve rotates forwards or backwards. The height of the scraping plate is selected to ensure normal rotation of the outer sleeve, and the specific height is selected according to the requirements of material characteristics, rotary digging resistance, maximum torque of sleeve rotation, material output and the like.

The rotary outer sleeve is provided with a far-end revolution driving device at the far end, the rotary outer sleeve is connected with racks arranged along the circumference of the bottom of the inner wall of the storage bin through a speed reducing mechanism and a driving gear, power is transmitted through the rotation of the outer sleeve, the far-end driving gear moves along the racks to realize the revolution of the sleeve along the inner wall of the storage bin, and the rotation of the outer sleeve rotates to carry out rotary excavating and discharging operation on materials at the bottom of the bin. The rotation and revolution speeds of the outer sleeve are specifically determined by the requirements of the discharging mechanism, and the like, and are adjusted by the control system.

The outer sleeve rotates and is driven by a driving device positioned at the center of the material bin, and the far end of the outer sleeve revolves along the bottom surface of the flat bottom bin while rotating.

The spiral discharging mechanism is arranged in the outer sleeve, and the inner spiral discharging mechanism and the outer sleeve revolve together. Meanwhile, the spiral discharging mechanism is driven to rotate by a driving device located at the center of the material bin, and is responsible for spirally conveying the materials entering the outer sleeve into a discharging hole in the center of the storage bin, conveying the materials to a conveying belt at the lower part through the discharging hole, and completing the complete discharging process of the materials.

The far end of the internal spiral discharging mechanism is connected with the far end of the outer sleeve through a bearing 14, and the spiral discharging mechanism and the sleeve rotate independently while the far end point of the spiral discharging mechanism is supported, so that no working influence is generated.

As shown in fig. 3, two sets of power driving systems are installed inside the central driving device 3, and respectively drive the outer sleeve and the internal spiral discharging mechanism, and are respectively connected with the outer sleeve and the spiral discharging mechanism inside the sleeve through a speed reducing mechanism; in order to realize the rotation of the central part, an upper plane stress bearing and a lower plane stress bearing are installed, the upper part of the upper plane stress bearing 12 is a conical protective cover, the lower part of the upper plane stress bearing is connected with a vertical cylinder type shell 13, the upper part of the lower plane stress bearing 11 is connected with the vertical cylinder type shell 13, the lower part of the lower plane stress bearing is fixed with the bottom foundation of the storage bin, components such as a power driving system and the like are installed on the upper plane of the lower plane stress bearing 11, and the vertical cylinder type shell and the power driving system rotate along.

The periphery of the central driving device is provided with a vertical cylinder type shell 13 for preventing materials from entering the interior, and the pressure of the upper protective cover is transmitted to the ground foundation while the driving device is enabled to rotate freely around the bottom surface of the storage bin. The vertical cylinder type shell 13 rotates together with the whole of the driving device, only the round hole is formed in the extending position of the outer sleeve, and the vertical cylinder type shell 13 can provide personnel overhaul space and is manufactured into a higher space structure. A spiral discharging mechanism driving motor and an outer sleeve driving motor are arranged in a vertical cylinder type shell 13 of the central driving device 3 and are respectively connected with the spiral discharging mechanism and the outer sleeve.

The upper part of the central driving device is provided with a steel protective cover which is connected with a vertical cylinder type protective shell of the central driving device through a plane pressure bearing below the protective cover, the protective cover is used for preventing upper materials from falling into the driving device and transmitting the load of the upper materials to the vertical cylinder type protective shell, and then the load is transmitted to a foundation through a lower plane pressure bearing. In the case of an upper material accumulation, the protective casing is blocked from rotation, while the lower vertical cylinder housing 13 can rotate normally.

A discharge hole is arranged at the center of the lower part of the central driving device 3; in the central driving device 3, the material in the outer sleeve is sent out from the cylinder by the spiral discharging mechanism and falls into a discharging hole at the lower part.

The outer sleeve and the inner spiral discharging mechanism together revolve around the central driving device 3 on the bottom surface of the storage bin at any angle, the revolution direction is determined by the rotation direction of the outer sleeve, the change of the rotation direction of the outer sleeve can change the steering of a mechanical gear of the distal revolution driving device, and finally the change of the revolution direction is caused, and the steering can be intelligently controlled by an automatic control system.

The power drive means may be an electric motor or a hydraulic motor. The motor drive is provided with a heavy-duty starting device. If a hydraulic drive is used, its hydraulic station is arranged inside the central drive. The driving power is adjusted according to the requirement of the discharge capacity.

As shown in fig. 4 and 5, the distal end revolution driving device is driven by the rotating force of the outer sleeve 1, the outer sleeve 1 is connected with the gear reduction box 7, the gear reduction box 7 reduces the speed and then drives the driving gear 4, the driving gear is meshed with the lower rack 6 or the upper rack 5, the driving gear rotates to drive the outer sleeve to revolve, and the upper rack and the lower rack are arranged for a whole circle along the inner wall of the storage bin.

An upper gear strip and a lower gear strip are arranged along the bottom of the inner wall of the material bin, the lower gear strip is used for the revolving forward of the sleeve type discharging mechanism, and the lower gear strip is used for the revolving backward. The distance between the upper and the lower gear bars is set to be larger than the diameter of the gear for driving the revolution driving mechanism, and a certain working gap is left. The working gap is generally set to be about 10-200mm, and is adjusted according to the characteristics of the materials, the length of the sleeve type discharging mechanism and the pressure of the materials on the upper part. For materials such as grains, iron ores and the like which can not generate abnormal advancing resistance such as shed arch, pile-pressing clot and the like, an upper rack can be omitted;

when the revolving gear advances, if the revolving gear still encounters certain resistance and cannot advance smoothly, the gear can be lifted and separated from the lower gear strip for idle rotation, and the outer sleeve can still continue to dig materials in a rotary mode until the materials can continue to advance. When the outer sleeve rotates to revolve, the outer sleeve encounters special working conditions that material shed arches, piled blocks and the like are difficult to remove in the advancing process, when the resistance is too large and the outer sleeve cannot continue to advance, the sleeve generates lifting force by means of the rotation of the sleeve, the revolution driving device is lifted after the structure flexible deformation is generated at the far end of the outer sleeve, the revolution driving gear is lifted to be separated from the lower rack and is in tooth connection with the upper rack, the revolution direction of the sleeve is reversed, and the outer sleeve retreats reversely at the moment; when the material retreats until the resistance of the material disappears, the outer sleeve naturally falls under the action of the self weight and the rotary excavating downward pressure and is connected with the lower rack again, the running direction of the outer sleeve is reversed again, and the outer sleeve continues to advance; by repeating the process, the self-rotation function of the resistance of the material under the special condition can be broken in a full-mechanical self-adaptive mode until the material which will block the forward motion is dug completely, the self-rotation function can be broken, the blockage fault of the sleeve-type spiral discharging mechanism due to overlarge resistance can not occur, and the running reliability of the mechanism is greatly improved.

And a steel cover is arranged on the upper part of the rack along the inner wall of the material bin, so that the material is prevented from directly falling into the rack to influence the revolution of the sleeve type discharging mechanism. The size of the encloser is suitable for the situation that the materials cannot naturally slide into the rack mechanism, the setting of the inclined slope of the encloser is adjusted by a repose angle larger than the materials, and the materials on the upper part of the protective encloser can naturally slide and cannot be retained and enter the rack mechanism. If the materials are stored, such as sugar, sand and the like, which are rolled without affecting the overall performance of the materials and the normal operation of the discharging mechanism, the protective cover shell is not arranged. In order to prevent the materials from falling into the revolution driving device to block the device from running, a whole circle of material baffle plates 9 surrounding the inner wall 21 of the storage bin is arranged on the upper portion of the upper rack 5, the width of each material baffle plate 9 is 1m in the horizontal direction, the gradient of each material baffle plate is larger than the repose angle of coal, and the material baffle plate reinforcing support frame 16 is used for reinforcing and supporting.

During construction, firstly, a discharge hole 8 and a base of a central driving device 3 are arranged at the upper part of an underground belt gallery and the center of a storage bin, and a lower plane stress bearing 11 and an attached base thereof are arranged on the base; installing an upper rack 5 and a lower rack 6 of the revolution driving device in place on the inner wall side of the storage bin and checking the installation precision; a positioning gear reducer 7; then hoisting the outer sleeve and the internal spiral unloading mechanism in place; connecting the outer sleeve with a gear reduction box 7; two sets of

power driving motors

17 and 18, accessories and a vertical cylinder type shell 13 are arranged in a central driving device; the outer sleeve 1 and the spiral discharging structure 2 are respectively connected with

power driving systems

17 and 18 in a central driving device; and (3) switching on power devices such as a power supply and the like, checking the no-load running condition of the installed part, and installing the upper plane stressed bearing 12 and the protective cover 10 of the central driving device, the striker plate 9 on the side wall of the storage bin and the support frame 16 after the parts are debugged to be qualified. Then, carrying out no-load test on the whole mechanism, adding part of materials after the no-load test is qualified, burying the materials until the materials reach 200mm of the upper part of the outer sleeve, and carrying out a load test; after the test is qualified, adding materials into the outer sleeve to bury the outer sleeve for 2m, and carrying out a half-load test; adding materials to 10m height after the materials are qualified, and carrying out a full load experiment; finally, carrying out whole storage bin system experiment, and finally accepting and handing over after being qualified.

The sleeve type autorotation spiral unloader comprises an outer sleeve 1, a spiral unloading mechanism 2, a central driving device 3 and a revolution driving device consisting of a gear 4, an upper rack 5, a lower rack 6 and a gear reduction box 7. The radius from the center of the storage bin to the inner wall of the storage bin is 35 m. The diameter of the outer sleeve 1 is 800mm, the thickness of the cylinder wall is 10mm, and the length is 33.5 m. The diameter of the spiral unloader 2 in the spiral unloader is 550mm, the height of the spiral blade is 10mm, the diameter of the spiral central cylinder is 350mm, and the length is 36 m. The vertical cylinder type shell 13 of the central driving device 3 is 2m in diameter and 2.5m in height, and a circular hole is formed in the extending part of the outer sleeve 1 and has the diameter of 850 mm. The shield 10 of the central drive 3 is of conical or circular construction made of steel with a diameter of 2.3m and a height of 1 m.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A sleeve type self-revolving screw unloader comprises an outer sleeve, a screw unloading mechanism, a center driving device and a revolution driving device; it is characterized in that the spiral discharging mechanism is positioned inside the outer sleeve; the near end of the outer sleeve is provided with a center driving device, the far end of the outer sleeve is provided with a revolution driving device, the center driving device is positioned at the center of the bottom in the storage bin, the revolution driving device is positioned at the circumferential position of the bottom of the inner wall of the storage bin, and the outer sleeve is provided with a blanking hole.

2. The telescopic self-revolving screw discharger according to claim 1, wherein the outer sleeve has a plurality of blanking holes formed therein, the blanking holes being distributed in the sleeve in such a manner that they are axially arranged end to end and staggered in the circumferential direction.

3. The telescopic self-revolving screw unloader of claim 1, wherein the revolution driving means comprises a reduction gear and a driving gear, the distal end of the outer sleeve is connected to the reduction gear, the reduction gear drives the driving gear, and the driving gear is connected to a rack disposed along the circumference of the bottom of the inner wall of the storage bin.

4. The telescopic self-revolving screw unloader of claim 3, wherein an upper and a lower rack are provided along the bottom of the inner wall of the storage bin, the upper and lower racks are spaced apart from each other by a distance larger than the diameter of the driving gear with a certain working gap therebetween, and the driving gear is located between the upper and lower racks.

5. The telescopic self-revolving screw unloader of claim 1, wherein the central drive unit is internally provided with two power drive systems for driving the outer sleeve and the inner screw unloader, respectively, each connected to the outer sleeve and the screw unloader through a speed reduction mechanism.

6. The telescopic self-revolving screw unloader of claim 5, wherein the central driving unit is provided with upper and lower flat force-receiving bearings, the upper flat force-receiving bearing is a protective cover, the lower flat force-receiving bearing is connected to the vertical cylinder type housing, the upper flat force-receiving bearing is connected to the vertical cylinder type housing, the lower flat force-receiving bearing is fixed to the bottom base of the storage silo, the power driving system is provided on the upper flat surface of the lower flat force-receiving bearing, and the vertical cylinder type housing revolves together with the power driving system along with the outer sleeve.

7. The telescope-feed self-revolving screw unloader according to claim 1, wherein the blanking hole is provided at the middle or both sides in the circumferential direction with a protruding scraping plate for rotary excavating the material.

8. The telescopic self-revolving screw unloader of claim 3, wherein the rack is provided at an upper portion thereof with a full ring of striker plates around an inner wall of the storage bin.

9. The telescopic self-revolving screw unloader of claim 1, wherein the distal end of the screw discharge mechanism is coupled to the distal end of the outer sleeve by a bearing to support a distal point of the screw discharge mechanism.

10. The telescopic self-revolving screw unloader of claim 1, wherein a discharge hole is formed at a central position of a lower portion of the central driving unit.