CN203002324U - Inner teeth type biomass fuel granulator - Google Patents
Inner teeth type biomass fuel granulator Download PDFInfo
- Publication number
- CN203002324U CN203002324U CN2012207331730U CN201220733173U CN203002324U CN 203002324 U CN203002324 U CN 203002324U CN 2012207331730 U CN2012207331730 U CN 2012207331730U CN 201220733173 U CN201220733173 U CN 201220733173U CN 203002324 U CN203002324 U CN 203002324U
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- gear
- internal
- biomass fuel
- pressing machine
- internal gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/20—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring
- B30B11/201—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring for extruding material
- B30B11/202—Ring constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/22—Extrusion presses; Dies therefor
- B30B11/28—Extrusion presses; Dies therefor using perforated rollers or discs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The utility model relates to machinery equipment, and in particular relates to an inner teeth type biomass fuel granulator. The biomass fuel granulator comprises a circular mould (1) and an inner compression roller (3) assembled in the circular mould (1), and is characterized in that the circular mould (1) is an inner gear (2) in which a plurality of gear teeth are arranged, the inner compression roller (3) is an outer gear (4) which is meshed with the inner gear (2) and has a diameter smaller than the inner diameter of the root of the inner gear (2), and a plurality of through holes (5) along the radial direction of the gear are formed between the teeth of the inner gear (2) and/or the outer gear (4). The biomass fuel granulator has the beneficial effect that material can be well fed, idle rate is greatly lowered, the power consumption is greatly lowered, the work of the granulator is stable, the failure rate is low, the production efficiency is high, the extruded biomass particles are regular in shape and compact in structure, so that the granulator is expected to be the preferred machine type for manufacturing and utilizing biomass fuel.
Description
Technical field
The utility model relates to a kind of plant equipment, i.e. a kind of internal-gear type biomass fuel particle pressing machine.
Background technology
The biomass materials such as agricultural crop straw, weeds, wood chip are through pulverizing compression granulation fuel, and its density and calorific value have all approached the index of coal, and are used for industrial production.The process equipment of biomass granule fuel mainly contains two kinds of pair roller type and ring modes.The extruder member of pair roller type is the parallel tubular shape pressure roller of two outer surface contacts, and tube wall has a plurality of through holes, extrudes granular fuel at the biomass material that relatively rotates middle pulverizing from the through hole ecto-entad.Ring mode is to have a plurality of through holes on the sidewall of a tubular ring mould, and ring mould the inside is provided with and the inner press roll that encircles the mould inwall and press close to, and material is outwards extruded granular fuel by inner press roll from through hole after entering the ring mould.Pair roller type is simple in structure, and is cheap, and, mainly by the feeding of deadweight to the extruding point, because of the projecting pressure of extruding point pressure, thereby the material feeding property is not good due to material.In order to address this problem, someone has added the pusher screw feeder above pair roller, the somebody has added external gear in the outside of pair roller, and, the outer casing space that supports pair roller is larger, intensity is lower, what have does not also have a shell, only depends on stent support, and the activity interval of material is very large, be difficult to control, the improvement of feeding property is not remarkable.Compare with pair roller type, the material of ring mould enters inside the ring mould, limited space, and peripheral intensity is high, and pusher pressure can be brought into play larger effect, and feeding property is better., because the surface of ring mould inwall and inner press roll is the plane, although more coarse, to material to add the ability of holding still very limited, the idle running rate is higher, has wasted thus a large amount of power.A ring mould particle pressing machine necessary electromotor of per hour suppressing 1.5 tons reaches 110KW, and ton power consumption cost has improved the cost of product near hundred yuan.In addition, the existing equipment fault rate is high, easily damages, and the physical and chemical indexs such as the size of material, hardness, humidity is required tighter, and adaptability is relatively poor, has limited and has applied.
Summary of the invention
The purpose of this utility model is to provide a kind of pusher performance with environment simulation facility, and has good material clamp holding effect fruit, and feeding property is good; the idle running rate is low, and power consumption is low, and production efficiency is high; good product quality, and failure rate is low, adaptable biomass fuel particle pressing machine.
Above-mentioned purpose is realized by following technical scheme: develop a kind of internal-gear type biomass fuel particle pressing machine; comprise the ring mould and be fitted in the inner press roll that encircles the mould the inside; be characterized in: said ring mould has the internal gear of a plurality of gear teeth in being; said inner press roll be meshed with internal gear and diameter less than the external gear of internal gear tooth root internal diameter, each between cog of internal gear and/or external gear has a plurality of along gear through hole radially.
The external gear of said internal gear the inside has one at least.
Said internal gear or external gear are provided with through hole, and the outer rim that is provided with the gear tooth of through hole is tip-angled shape.
Said internal gear and/or external gear gear teeth both sides have through hole, and the through hole of same gear teeth both sides is combined into same hole at gear teeth internal exchange.
Said internal gear front opening and relative with the feeding screw feeder, there is the base plate sealing rear end and is fixed in anchor ear, anchor ear is connected mutually with front-end of spindle, main shaft in a tubular form, its rear end enters power house and drive is housed, drive is by the power output wheel phase transmission of drive disk assembly with motor, the internal gear rear end is provided with base plate, perforate and communicating with the main shaft pore in the middle of base plate, back shaft passes from perforate and main shaft, and the back shaft front end is fixed with connecting plate, is provided with gear shaft above connecting plate, external gear is installed on gear shaft, and the back shaft rear end is fixed on after-poppet.
Flying wheel is equipped with in the outside of said main shaft.
Each between cog of said external gear and/or the both sides of tooth have a plurality of along gear through hole radially, the wheel disc of gear in a tubular form, the wheel back-end disk is assemblied on the gear shaft of connecting plate, front opening and be connected to discharge nozzle, discharge nozzle stretches out forward shell.
The flight of feeding screw feeder is housed outside the discharge nozzle of said external gear.
Said internal gear opening upwards, assembling is rotated on periphery and chassis, and the discharge nozzle of the external gear inside internal gear is passed down through the chassis and drive is housed, with the power output wheel phase transmission of motor.
The opening upwards of said internal gear, assembling is rotated on periphery and chassis, and the discharge nozzle of the external gear inside internal gear is passed down through the chassis, and the top, chassis is provided with motor, the power output wheel of motor and the transmission of internal gear phase.
The beneficial effects of the utility model are: the feeding property of material is good, the idle running rate declines to a great extent, power consumption significantly reduces, and working stability, failure rate is low, production efficiency are high, the biological particles regular shape of extruding, close structure is expected to become the first-selected type of the processing and utilization of biomass fuel.
Description of drawings
Fig. 1 is the structure principle chart of the first embodiment;
Fig. 2 is the structure principle chart of the second embodiment;
Fig. 3 is the structure principle chart of the third embodiment;
Fig. 4 is the structure principle chart of the 4th kind of embodiment;
Fig. 5 is the front view of the 5th kind of embodiment;
Fig. 6 is the A-A left view of the 5th kind of embodiment;
Fig. 7 is the B-B left view of the 5th kind of embodiment;
Fig. 8 is the parts inner press roll assembling front view of the 5th kind of embodiment;
Fig. 9 is the parts inner press roll assembling left view of the 5th kind of embodiment;
Figure 10 is the front view of the 6th kind of embodiment;
Figure 11 is the left view of the 6th kind of embodiment;
Figure 12 is the front view of the 7th kind of embodiment;
Figure 13 is the left view of the 7th kind of embodiment;
Figure 14 is the front view of the 8th kind of embodiment;
Figure 15 is the top view of the 8th kind of embodiment;
Figure 16 is the front view of the 9th kind of embodiment.
In figure as seen: the ring mould 1, internal gear 2, inner press roll 3, external gear 4, through hole 5, wedge angle 6, base plate 7, discharging opening 8, shell 9, feeding screw feeder 10, feeding mouth 11, conveying mouth 12, conveying pipeline 13, motor 14, input port 15, power house 16, after-poppet 17, back shaft 18, flying wheel 19, main shaft 20, drive 21, anchor ear 22, door-hinge 23, motor rack 24, gear shaft 25, connecting plate 26, discharge nozzle 27, chassis 28.
The specific embodiment
The design that the utility model is total, extruder member ring mould and the inner press roll of biomass fuel change respectively internal gear and external gear into, and the between cog of gear has through hole, presses living beings through hole to form particle in the process that engagement is rotated.Below, introduce nine embodiment around above-mentioned design.
The first embodiment: as shown in Figure 1; the extruder member of this biomass fuel particle pressing machine also is comprised of ring mould 1 and inner press roll 3, and ring mould 1 wherein is an internal gear 2, and inner press roll 3 is external gears 4; external gear 4 is contained in inside internal gear, and is meshed with internal gear 2.The external diameter of external gear 4 is less than the root diameter of internal gear 2, internal gear 2 the insides, an external gear 4 is housed at least.Have a plurality of through holes 5 that lead to ring mould 1 outside between each gear teeth of internal gear 2, when external gear 4 does not have through hole work, the biomass material that process is pulverized enters from an end of internal gear 2, and internal gear 2 and external gear push through material through hole and are pressed into particle in rotation.
The second embodiment: as shown in Figure 2, ring mould 1 is an internal gear 2, and inner press roll 3 is two external gears 4.Between each gear teeth of internal gear 2 and each gear teeth both sides all have a plurality of through holes 5 that lead to ring mould 1 outside, and external gear 4 does not have through hole.During work, the biomass material that process is pulverized enters from an end of internal gear 2, and internal gear 2 and external gear push through material through hole and are pressed into particle in rotation.In figure, as seen, the through hole 5 of internal gear 2 both sides merges into a hole in tooth, is convenient to like this processing, and can guarantee the intensity of the gear teeth.In addition, the tooth top of internal gear is tip-angled shape, and this wedge angle 6 can make the material of external gear 4 between cog be cut and press to smoothly through hole 5, prevents that material is in the between cog accumulation of external gear 4.
The third embodiment: as shown in Figure 3, two external gears 4 are equipped with in internal gear 2 the insides.Internal gear 2 and external gear each gear teeth between have a plurality of through holes 5.During work, the biomass material that process is pulverized enters from an end of internal gear 2, at internal gear 2 and external gear in rotation, part material is extruded outside ring mould 1 by the through hole 5 of internal gear 2, another part material is inwardly clamp-oned in the endoporus of external gear 4 by the through hole 5 of external gear 4, then extrudes from an end of endoporus.
The 4th kind of embodiment: as shown in Figure 4, three external gears 4 are equipped with in internal gear 2 the insides, there is no through hole on internal gear 2, and between each gear teeth of external gear 4 and gear teeth both sides have a plurality of through holes 5.The gear teeth top of external gear 4 is wedge angle 6 shapes.During work, the biomass material that process is pulverized enters from an end of internal gear 2, and internal gear 2 and external gear push through the through hole 5 of external gear 4 and clamp-on in the endoporus of external gear 4 in rotation, then extrude from an end of endoporus.
The 5th kind of embodiment: as shown in Fig. 5,6; be provided with conveying pipeline 13 above the biomass fuel particle pressing machine; conveying pipeline 13 1 ends have input port 15; in the pusher screw feeder is arranged; there is conveying mouth 12 other end below; the feeding mouth 11 of conveying mouth 12 and particle pressing machine shell top is relative, and feeding mouth 11 the insides are provided with feeding screw feeder 10, and feeding screw feeder 10 is relative with the opening that encircles mould 1.Ring mould 1 is an internal gear 2, and the inner press roll 3 of the inside is two external gears 4 that are meshed with internal gear 2.Each between cog of internal gear 2 and gear teeth both sides all have a plurality of through holes 5.The other end of internal gear wheel 2 is by base plate 7 shutoff, and perforate in the middle of base plate 7 picks out main shaft 20 backward.Main shaft 20 in a tubular form, back shaft 19 is passed in the inside.In conjunction with Fig. 8 Fig. 9 as seen, back shaft 19 front ends enter ring mould 1 through the mesopore of internal gear 2 base plates 7, and fixedly a slice connecting plate 26, and two gear shafts 25 are housed on connecting plate 26, and external gear 4 is installed on gear shaft 25.Back shaft 19 passes backward collar bush 20 and is fixed on after-poppet 17.In conjunction with Fig. 7 as seen, in power house 16 the insides, be fixed with motor 14 by motor rack 24, the power output wheel of motor 14 is by belt and the drive 21 phase transmissions that are fixed on main shaft 20 outsides.Huge flying wheel 19 is housed on main shaft 20, can stores a large amount of kinetic energy, guarantee the continuity of main shaft 20 transferring energies.
During work, first the living beings such as stalk, weeds, wood fragments are pulverized, 15 send into conveying pipeline 13 through the input port, then send into feeding mouth 11 from conveying mouth 12, then are pressed into internal gear 2 by feeding screw feeder 10.Start motor 14, can drive main shaft 20 together with anchor ear 22 and internal gear 2 rotations of front end, then drive external gears 4 rotations by internal gear 2.Can clamp-on material between the gear teeth of engagement, and extrude by through hole 5, then flow out from discharging opening 8, pack after cooling and get final product.
Observe proof through experiment, when material was clamp-oned two between cog, the space was larger, easily entered, and is then clamped gradually, in the moment that the gear teeth mesh fully, produced great explosive force, completes an extrusion process.Compare with original column type inner press roll, power consumption has intermittence, and the gear teeth of gear force to sweep along to material, can not dally, thereby can save a large amount of power.The type of per hour producing 1.5 tons of granular fuels only needs the motor of 55-75 kilowatts, has saved a large amount of electric energy, has reduced the cost of granular fuel.The granular fuel diameter 6-12mm of compacting, length 20-50mm's, density＞1.1 ton/m
3, calorific value＞3500kcal/kg has approached density and the calorific value of coal.
Below to test in the recent period measured product performance index:
| Project | The wood pellet index | The stalk particle index | Rice husk particle index |
| Calorific value | ＞4200kcal/kg | ＞3800kcal/kg | ＞4100kcal/kg |
| Density | ＞1.15t/m 3 | ＞1.15t/m 3 | ＞1.15t/m 3 |
| Particle diameter | 6mm | 6mm | 6mm |
| Ash content | ≤2.5% | ≤4% | ≤8% |
| Moisture≤〉= | ≤8% | ≤12% | ≤12% |
| Combustion rate | ≥95% | ≥95% | ≥95% |
| The thermal efficiency | ≥81.5% | ≥81.5% | ≥81.5% |
| Oke exhaust blackness | ＜1(lingemann grade) | ＜1(lingemann grade) | ＜1(lingemann grade) |
| Dust exhausting concentration | ＜80vmg/m 3 | ＜80vmg/m 3 | ＜80vmg/m 3 |
The structure of the 6th kind of facility that embodiment: Figure 10 is shown in Figure 11 and the 5th kind of embodiment is very approaching, and difference is: internal gear 2 and external gear 4 all have through hole 5, and a part of compressing grains is extruded from internal gear 2, and a part of particle is extruded from external gear 4.The particle that internal gear 2 is extruded the still discharging opening below shell 98 is discharged, and the particle that two external gears 4 are extruded needs separately to establish passage and takes out.For this reason, pick out discharge nozzle 27 at external gear 4 front ends, discharge nozzle 27 front ends stretch out shell 9, and the particle of compression can be from sending again.
Owing to increasing by two discharge nozzles 27, feeding screw feeder 10 must stagger with discharge nozzle 27.In order to make material obtain balanced thrust, be provided with two feeding screw feeders 10 in figure, with two expenditure grain pipe 27 symmetric arrays.Simultaneously, feeding mouth 11 and conveying mouth also increase to respectively two.
The structure of the 7th kind of facility that embodiment: Figure 12 is shown in Figure 13 and the 6th kind of embodiment is very approaching, and external gear 4 front ends also pick out two discharge nozzles 27, and discharge nozzle 27 front ends stretch out shell 9, and the particle of compression can be from sending again.Its improvement is: at the flight of the outside of discharge nozzle 27 suit feeding screw feeder 10, so just feeding screw feeder 10 and discharge nozzle 27 are combined in a place, when discharge nozzle 27 rotates, feeding screw feeder 10 rotates simultaneously, has both save two screw feeder motors, simplify the structure again, thereby make structure compact and reasonable more.
The 8th kind of embodiment: as shown in Figure 15 in Figure 14, the opening upwards of the external gear 4 that internal gear 2 and the inside are meshed, assembling is rotated on the hypomere of internal gear 2 and the chassis of frame 28, and the discharge nozzle 27 of the interior external gear 4 of ring mould 1 is passed down through chassis 28, and particle can therefrom flow down.Be provided with bulge loop above chassis 28 around internal gear 2, have discharging opening 8 on the chassis in bulge loop, the particle that internal gear 2 is extruded flows down from discharging opening 8.In the middle of two discharge nozzles 27, have a pipe that drive 21 is housed outward, with the power output wheel of motor 14 by the transmission of belt phase.
The 9th kind of embodiment: as shown in figure 16, the opening upwards of the external gear 4 that internal gear 2 and the inside are meshed, assembling is rotated on the hypomere of internal gear 2 and the chassis of frame 28, and the discharge nozzle 27 of the interior external gear 4 of ring mould 1 is passed down through chassis 28, and particle can therefrom flow down.Be provided with bulge loop above chassis 28 around internal gear 2, have discharging opening 8 on the chassis in bulge loop, the particle that internal gear 2 is extruded flows down from discharging opening 8.Motor 14 is fixed on the top on chassis 28, and the power output wheel of motor is by the external diameter phase transmission of belt with internal gear 2.
Claims (10)
1. internal-gear type biomass fuel particle pressing machine; comprise ring mould (1) and be fitted in the inner press roll (3) that encircles mould (1) the inside; it is characterized in that: said ring mould (1) has the internal gear (2) of a plurality of gear teeth in being; said inner press roll (3) be meshed with internal gear (2) and diameter less than the external gear (4) of internal gear (2) tooth root internal diameter, each between cog of internal gear (2) and/or external gear (4) has a plurality of along gear through hole (5) radially.
2. internal-gear type biomass fuel particle pressing machine according to claim 1 is characterized in that: the external gear (4) of said internal gear (2) the inside has one at least.
3. internal-gear type biomass fuel particle pressing machine according to claim 1, it is characterized in that: one of said internal gear (2) and external gear (4) are provided with through hole (5), and the outer rim that is provided with the gear tooth of through hole (5) is wedge angle (6) shape.
4. biomass fuel particle pressing machine according to claim 1 is characterized in that: said internal gear (2) and/or external gear (4) gear teeth both sides have through hole (5), and the through hole (5) of same gear teeth both sides is combined into same hole at gear teeth internal exchange.
5. internal-gear type biomass fuel particle pressing machine according to claim 1, it is characterized in that: the front opening of said internal gear (2) and relative with feeding screw feeder (10), there is the base plate sealing rear end and is fixed in anchor ear (22), anchor ear (22) is connected mutually with main shaft (20) front end, main shaft (20) in a tubular form, its rear end enters power house (16) and drive (21) is housed, drive (21) is by the power output wheel phase transmission of drive disk assembly with motor (14), internal gear (2) rear end is provided with base plate (7), perforate and communicating with main shaft (20) pore in the middle of base plate (7), back shaft (18) passes from perforate and main shaft (20), back shaft (18) front end is fixed with connecting plate (26), be provided with gear shaft (25) above connecting plate (26), the upper external gear (4) of installing of gear shaft (25), back shaft (18) rear end is fixed on after-poppet (17).
6. internal-gear type biomass fuel particle pressing machine according to claim 5, it is characterized in that: flying wheel (19) is equipped with in the outside of said main shaft (20).
7. internal-gear type biomass fuel particle pressing machine according to claim 1; it is characterized in that: each between cog of said external gear (2) and/or the both sides of tooth have a plurality of along gear through hole (5) radially; the wheel disc of gear in a tubular form; the wheel back-end disk is assemblied on the gear shaft (25) of connecting plate (26); front opening and be connected to discharge nozzle (27), discharge nozzle (27) stretches out forward shell (9).
8. internal-gear type biomass fuel particle pressing machine according to claim 7, is characterized in that: the flight that feeding screw feeder (10) is housed outside the discharge nozzle (27) of said external gear (4).
9. internal-gear type biomass fuel particle pressing machine according to claim 1; it is characterized in that: said internal gear (2) opening upwards; assembling is rotated on periphery and chassis (28); the discharge nozzle (27) of the external gear (4) of internal gear (2) the inside is passed down through chassis (28) and drive (21) is housed, with the power output wheel phase transmission of motor (14).
10. internal-gear type biomass fuel particle pressing machine according to claim 1; it is characterized in that: the opening upwards of said internal gear (2); assembling is rotated on periphery and chassis (28); the discharge nozzle (27) of the external gear (4) of internal gear (2) the inside is passed down through chassis (28); top, chassis (28) is provided with motor (14), the power output wheel of motor (14) and internal gear (2) phase transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207331730U CN203002324U (en) | 2012-12-27 | 2012-12-27 | Inner teeth type biomass fuel granulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207331730U CN203002324U (en) | 2012-12-27 | 2012-12-27 | Inner teeth type biomass fuel granulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203002324U true CN203002324U (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012207331730U Expired - Fee Related CN203002324U (en) | 2012-12-27 | 2012-12-27 | Inner teeth type biomass fuel granulator |
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| Country | Link |
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| CN (1) | CN203002324U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028346A (en) * | 2012-12-27 | 2013-04-10 | 内蒙古沃德生物质科技有限公司 | Internal tooth type biomass fuel pellet press |
| CN104841336A (en) * | 2015-05-26 | 2015-08-19 | 安徽大地节能科技有限公司 | Involute-type granulator |
| CN104841337A (en) * | 2015-05-26 | 2015-08-19 | 安徽大地节能科技有限公司 | Cycloidal granulator |
| CN105413586A (en) * | 2015-12-22 | 2016-03-23 | 济南大学 | Ring-die granulator, and operating method and application thereof |
| CN106363948A (en) * | 2016-10-21 | 2017-02-01 | 江苏大学 | Tooth profile type ring die curing forming device |
| CN107962807A (en) * | 2017-12-04 | 2018-04-27 | 曹燕燕 | A kind of stalk block making machine |
-
2012
- 2012-12-27 CN CN2012207331730U patent/CN203002324U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028346A (en) * | 2012-12-27 | 2013-04-10 | 内蒙古沃德生物质科技有限公司 | Internal tooth type biomass fuel pellet press |
| CN104841336A (en) * | 2015-05-26 | 2015-08-19 | 安徽大地节能科技有限公司 | Involute-type granulator |
| CN104841337A (en) * | 2015-05-26 | 2015-08-19 | 安徽大地节能科技有限公司 | Cycloidal granulator |
| CN104841337B (en) * | 2015-05-26 | 2017-04-05 | 安徽大地节能科技有限公司 | A kind of cycloidal type granulator |
| CN105413586A (en) * | 2015-12-22 | 2016-03-23 | 济南大学 | Ring-die granulator, and operating method and application thereof |
| CN105413586B (en) * | 2015-12-22 | 2018-02-09 | 济南大学 | A kind of ring die pelleter and its method of work and application |
| CN106363948A (en) * | 2016-10-21 | 2017-02-01 | 江苏大学 | Tooth profile type ring die curing forming device |
| CN107962807A (en) * | 2017-12-04 | 2018-04-27 | 曹燕燕 | A kind of stalk block making machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20151227 |