CN115744102A - Feeding mechanism and method for crushed wood chips - Google Patents
Feeding mechanism and method for crushed wood chips Download PDFInfo
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- CN115744102A CN115744102A CN202211491679.XA CN202211491679A CN115744102A CN 115744102 A CN115744102 A CN 115744102A CN 202211491679 A CN202211491679 A CN 202211491679A CN 115744102 A CN115744102 A CN 115744102A
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- wood chips
- cooking cylinder
- cooking
- feeding
- feeding mechanism
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- 239000002023 wood Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010411 cooking Methods 0.000 claims abstract description 59
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000011295 pitch Substances 0.000 description 6
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
The invention belongs to the technical field of wood conveying equipment for density board production, and particularly relates to a feeding mechanism and a method for crushed wood chips, wherein the feeding mechanism is a spiral conveyor, and the spiral conveyor comprises a central shaft, spiral blades and a machine shell; the casing is provided with a feed inlet far away from the end of the cooking cylinder; the pitch of the helical blade is gradually increased from the feed inlet to the cooking cylinder; the space between two adjacent circles of the helical blades is gradually reduced from the feed inlet to the cooking cylinder; compared with the prior art, by using the feeding mechanism for the crushed wood chips, the volume of the wood chips in the screw conveyer is continuously compressed in the process of moving from the feeding hole to the cooking cylinder, and the high-density material plug is formed at the end far away from the feeding hole, so that pressure steam and cooking liquid in the cooking cylinder can be prevented from leaking; meanwhile, the contact area between the wood chips positioned between two adjacent circles of the helical blades and the inner wall of the shell is continuously increased, the friction force between the wood chips and the inner wall of the shell in the conveying process is large enough, and the wood chips are prevented from slipping in the wood chip conveying process of the helical conveyor.
Description
Technical Field
The invention belongs to the technical field of timber conveying equipment in density board production, and particularly relates to a feeding mechanism and method for crushed wood chips.
Background
The production process flow of the density board comprises the following steps: the timber is cut down and transported into a factory to be sliced, cooked, hot-ground, dried, paved, hot-pressed, cured, sanded, cut and put in storage. The cooking process is carried out in a cooking cylinder (the air pressure in the cooking cylinder is more than one atmosphere); the cooking vat is fed by a screw conveyor, and a feed inlet is arranged at the position corresponding to the screw conveyor.
The screw conveyer belongs to a forced feeding device, and the working process is divided into three stages of feeding, squeezing dewatering and plug forming. When the loose materials are pushed to the squeezing and dewatering section from the feeding groove, the volume of the spiral groove is continuously reduced along with the decreasing of the screw pitch and the diameter, the materials are gradually compressed and dewatered, and finally, the normal-pressure materials are compressed into high-density material plugs under the extrusion of the blades at the tail part of the spiral, and the high-density material plugs are continuously and uniformly sent into the boiling cylinder with pressure. The high-density material plug also has the function of pressure sealing, and prevents pressure steam and cooking liquor in the cooking cylinder from leaking.
As shown in the following diagram two, in the prior art, the casing of the screw conveyor matched with the cooking vat is in a horn shape, the diameter of the screw conveyor at the feed inlet of the cooking vat is the smallest, the screw pitch between the screw blades is gradually reduced from the inlet end to the outlet end of the screw conveyor, and during the conveying process, wood in the screw conveyor is compressed to form a plug (the casing is in a horn shape, and the volume between adjacent screw threads from right to left is reduced), so that the problem is caused that the axial conveying speed of materials with small screw pitches between the screw blades near the feed inlet of the cooking vat is low, and the phenomenon of feeding slip is easy to occur.
Disclosure of Invention
The invention provides a feeding mechanism and a feeding method for milled wood chips, which aim to solve the problems.
In order to achieve the purpose, the invention adopts the technical scheme that: a feeding mechanism for crushed wood chips feeds materials into a high-pressure cooking cylinder; the feeding mechanism is a screw conveyor, and the screw conveyor comprises a central shaft, a screw blade and a shell; the end of the shell, which is far away from the cooking cylinder, is provided with a feed inlet; the pitch of the helical blades is gradually increased from the feed inlet to the cooking cylinder; the space between two adjacent circles of helical blades is gradually reduced from the feed inlet to the cooking cylinder.
Preferably, the outer diameter of the spiral blade is kept constant from the feeding hole to the cooking cylinder; the inner diameter of the shell is kept unchanged from the feeding hole to the cooking cylinder; the outer diameter of the central shaft is gradually increased from the feed port to the cooking cylinder.
Preferably, the outer diameter of the spiral blade is gradually reduced from the feed port to the cooking cylinder; the inner diameter of the shell is gradually reduced from the feeding hole to the cooking cylinder; the outer diameter of the central shaft is kept unchanged from the feed inlet to the cooking cylinder.
Preferably, the chips are broken by opposed lickerin rolls before entering the feed opening.
Preferably, the screw conveyor further comprises a head bearing, a tail bearing and a middle bearing.
A feeding method of crushed wood chips comprises the steps that a feeding mechanism of the crushed wood chips is arranged on the feeding side of a cooking cylinder, and the crushed wood chips are fed into a screw conveyor through a feeding hole; the volume of the wood chips in the screw conveyor is continuously compressed in the process of moving the wood chips from the feeding hole to the cooking cylinder, and meanwhile, the contact area between the wood chips positioned between two adjacent circles of the screw blades and the inner wall of the shell is continuously increased, so that the wood chip slippage in the wood chip conveying process of the screw conveyor is reduced or avoided.
Preferably, the chips in the screw conveyor are continuously compressed to form a high-density plug at the end far away from the feed port.
Compared with the prior art, the invention has the advantages and positive effects that:
the volume of the wood chips in the screw conveyer of the feeding mechanism (1) for the crushed wood chips is continuously compressed in the process of moving the wood chips from the feeding hole to the cooking cylinder, and a high-density material plug is formed at the end far away from the feeding hole, so that pressure steam and cooking liquid in the cooking cylinder can be prevented from leaking; meanwhile, the contact area between the wood chips positioned between two adjacent circles of the spiral blade and the inner wall of the shell is continuously increased, the friction force between the wood chips far away from the feed inlet of the spiral conveyor and the inner wall of the shell is large enough in the conveying process, and the wood chips are prevented from slipping in the wood chip conveying process of the spiral conveyor;
(2) The prior art is changed, and the pitch of the helical blades is gradually increased from the feed inlet to the cooking vat; the space between two adjacent circles of the helical blades is gradually reduced from the feed inlet to the cooking cylinder; and two spiral conveyors with different shapes and structures are designed under the invention idea.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced as follows:
FIG. 1 is a perspective view of a feeding mechanism for crushed wood chips in example 1;
FIG. 2 is a schematic view of a screw conveyor on the feed side of a cooking vat according to the prior art;
FIG. 3 is a perspective view of a feeding mechanism for crushed wood chips in example 1;
FIG. 4 is a schematic view of the central shaft and the helical blade of the feeding mechanism for crushed wood chips in example 1;
FIG. 5 is a schematic view of the housing of the feeding mechanism for cracked wood chips in example 1;
FIG. 6 is a schematic view of a licker-in for crushing wood chips;
fig. 7 is a schematic view of a feeding mechanism for crushed wood chips in example 2.
Description of reference numerals:
1-cooking vat;
2-screw conveyer, 21-central shaft, 22-helical blade, 23-machine shell, 231-feed inlet.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.
Example 1
The invention will be further described with reference to fig. 1-6, wherein the feeding mechanism for cracked wood chips shown in fig. 1-3 feeds into the high-pressure digester 1; the feeding mechanism is a screw conveyor 2, and the screw conveyor 2 comprises a central shaft 21, a screw blade 22 and a machine shell 23; the end of the casing 23 away from the cooking cylinder 1 is provided with a feed inlet 231.
As shown in fig. 1 and 4, the pitch of the spiral blade 22 gradually increases from the feed port 231 to the cooking pot 1; the space between two adjacent turns of the helical blade 22 decreases from the feed opening 231 to the cooking cylinder 1.
As shown in fig. 3 to 5, the outer diameter of the spiral blade 22 is constant from the feed port 231 to the cooking cylinder 1; the inner diameter of the casing 23 is constant from the feed port 231 to the cooking cylinder 1; the outer diameter of the center shaft 21 gradually increases from the feed port 231 to the cooking cylinder 1.
As shown in fig. 6, the chips are crushed by the opposite lickerin rolls before entering the feed port 231.
The screw conveyor 2 further comprises a head bearing, a tail bearing and a middle bearing.
The volume of the wood chips in the screw conveyor 2 is continuously compressed in the process of moving from the feed port 231 to the cooking cylinder 1, and a high-density material plug is formed at the end far away from the feed port 231, so that pressure steam and cooking liquid in the cooking cylinder 1 can be prevented from leaking; meanwhile, the contact area between the wood chips positioned between two adjacent circles of the spiral blades 22 and the inner wall of the shell 23 is continuously increased, the friction force between the wood chips far away from the feed port 231 of the spiral conveyor 2 and the inner wall of the shell 23 in the conveying process is large enough, and the wood chip slip in the wood chip conveying process of the spiral conveyor 2 is reduced or avoided.
Example 2
The difference between this example and example 1 is: as shown in fig. 7, the outer diameter of the spiral blade 22 gradually decreases from the feed port 231 to the cooking pot 1; the inner diameter of the casing 23 is gradually reduced from the feed port 231 to the cooking cylinder 1; the outer diameter of the central shaft 21 is constant from the feed opening 231 to the cooking cylinder 1.
A method for feeding crushed wood chips, wherein a feeding mechanism for crushed wood chips as claimed in claim 2 is installed on the feeding side of a cooking cylinder 1, and the crushed wood chips are fed into a screw conveyor 2 through a feeding port 231; the volume of the wood chips in the screw conveyor 2 is continuously compressed in the process of moving the wood chips from the feeding hole 231 to the cooking cylinder 1, and meanwhile, the contact area between the wood chips positioned between two adjacent circles of the screw blades 22 and the inner wall of the shell 23 is continuously increased, so that the wood chip slip in the process of conveying the wood chips by the screw conveyor 2 is reduced or avoided.
The chips in the screw conveyor 2 are compressed continuously and form a high density plug at the end remote from the feed port 231.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may apply the above-mentioned technical details to other fields by using the equivalent embodiments with equivalent changes or modifications, but any simple modification and equivalent changes made to the above embodiments according to the technical spirit of the present invention may still fall within the protection scope of the technical solution of the present invention.
Claims (7)
1. A feeding mechanism for crushed wood chips feeds materials into a high-pressure cooking cylinder (1); the device is characterized in that the feeding mechanism is a spiral conveyor (2), and the spiral conveyor (2) comprises a central shaft (21), spiral blades (22) and a machine shell (23); a feed inlet (231) is formed in the end, far away from the cooking cylinder (1), of the shell (23);
the pitch of the spiral blade (22) is gradually increased from the feed port (231) to the cooking cylinder (1); the space between two adjacent circles of the spiral blades (22) is gradually reduced from the feed port (231) to the cooking cylinder (1).
2. The feeding mechanism for crushed wood chips according to claim 1, characterized in that the outer diameter of the helical blade (22) is kept constant from the feeding port (231) to the cooking cylinder (1); the inner diameter of the shell (23) is kept constant from the feed port (231) to the cooking cylinder (1); the outer diameter of the central shaft (21) is gradually increased from the feed port (231) to the cooking cylinder (1).
3. The feeding mechanism for crushed wood chips according to claim 1, wherein the outer diameter of the helical blade (22) is gradually reduced from the feeding port (231) to the cooking cylinder (1); the inner diameter of the shell (23) is gradually reduced from the feed port (231) to the cooking vat (1); the outer diameter of the central shaft (21) is kept constant from the feed opening (231) to the cooking cylinder (1).
4. A feed mechanism for disintegrated wood chips according to claim 1, characterized in that the wood chips are disintegrated by opposite taker-in rollers before entering the feed opening (231).
5. The feeding mechanism for crushed wood chips as claimed in claim 1, wherein the screw conveyor (2) further comprises a head bearing, a tail bearing and a middle bearing.
6. A feeding method of crushed chips, characterized in that a feeding mechanism of crushed chips as claimed in claim 2 or 3 is installed on the feeding side of a digester (1) and the crushed chips are fed into a screw conveyor (2) through a feeding port (231); the volume of the wood chips in the screw conveyor (2) is continuously compressed in the process of moving the wood chips from the feed port (231) to the cooking cylinder (1), and meanwhile, the contact area between the wood chips positioned between two adjacent circles of the screw blade (22) and the inner wall of the shell (23) is continuously increased, so that the wood chip slip in the process of conveying the wood chips by the screw conveyor (2) is reduced or avoided.
7. Method for feeding crushed chips according to claim 6, characterized in that the chips in the screw conveyor (2) are compressed continuously and form a high-density plug at the end far from the feed opening (231).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211491679.XA CN115744102A (en) | 2022-11-25 | 2022-11-25 | Feeding mechanism and method for crushed wood chips |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211491679.XA CN115744102A (en) | 2022-11-25 | 2022-11-25 | Feeding mechanism and method for crushed wood chips |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115744102A true CN115744102A (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211491679.XA Pending CN115744102A (en) | 2022-11-25 | 2022-11-25 | Feeding mechanism and method for crushed wood chips |
Country Status (1)
| Country | Link |
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| CN (1) | CN115744102A (en) |
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| CN2446151Y (en) * | 2000-05-10 | 2001-09-05 | 赵静 | Grass tearing machine |
| CN2635618Y (en) * | 2003-08-29 | 2004-08-25 | 安丘汶瑞机械制造有限公司 | Reducing screw |
| JP2006240778A (en) * | 2005-03-01 | 2006-09-14 | Tatsuyuki Yamada | Carrying device |
| CN200964297Y (en) * | 2006-11-13 | 2007-10-24 | 济南锅炉集团有限公司 | Spacing variable screw shaft |
| JP2008222398A (en) * | 2007-03-14 | 2008-09-25 | Ishida Co Ltd | Carrying device and combinational weighing device having this carrying device |
| CN101906728A (en) * | 2010-07-15 | 2010-12-08 | 轻工业杭州机电设计研究院 | Wood chip helical extruding and tearing machine |
| CN102936861A (en) * | 2012-12-10 | 2013-02-20 | 轻工业西安机械设计研究院 | Extrusion fluffer |
| CN103159012A (en) * | 2011-12-09 | 2013-06-19 | 中粮营养健康研究院有限公司 | Screw feeder |
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| CN104786348A (en) * | 2015-04-17 | 2015-07-22 | 河南省四达仙龙实业有限公司 | Spiral propeller |
| CN104925537A (en) * | 2015-05-20 | 2015-09-23 | 浙江中科兴环能设备有限公司 | Material-plug-type spiral feeder |
| CN205413879U (en) * | 2015-07-16 | 2016-08-03 | 安徽中科绿世代环保科技有限公司 | Kitchen garbage spiral feeder |
| CN211468953U (en) * | 2019-09-30 | 2020-09-11 | 长沙昶超机械有限公司 | Variable-pitch bottle feeding auger |
| CN213111186U (en) * | 2020-09-17 | 2021-05-04 | 深圳市泰美瑞环保科技有限公司 | Energy-efficient flying dust screw conveyer |
| CN217149703U (en) * | 2021-12-31 | 2022-08-09 | 郑州运达造纸设备有限公司 | High-efficient spiral feeder |
-
2022
- 2022-11-25 CN CN202211491679.XA patent/CN115744102A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2446151Y (en) * | 2000-05-10 | 2001-09-05 | 赵静 | Grass tearing machine |
| CN2635618Y (en) * | 2003-08-29 | 2004-08-25 | 安丘汶瑞机械制造有限公司 | Reducing screw |
| JP2006240778A (en) * | 2005-03-01 | 2006-09-14 | Tatsuyuki Yamada | Carrying device |
| CN200964297Y (en) * | 2006-11-13 | 2007-10-24 | 济南锅炉集团有限公司 | Spacing variable screw shaft |
| JP2008222398A (en) * | 2007-03-14 | 2008-09-25 | Ishida Co Ltd | Carrying device and combinational weighing device having this carrying device |
| CN101906728A (en) * | 2010-07-15 | 2010-12-08 | 轻工业杭州机电设计研究院 | Wood chip helical extruding and tearing machine |
| CN103159012A (en) * | 2011-12-09 | 2013-06-19 | 中粮营养健康研究院有限公司 | Screw feeder |
| CN102936861A (en) * | 2012-12-10 | 2013-02-20 | 轻工业西安机械设计研究院 | Extrusion fluffer |
| CN104477583A (en) * | 2014-12-07 | 2015-04-01 | 重庆市雅洁纸业有限公司 | Cooking pipe feeding device |
| CN104786348A (en) * | 2015-04-17 | 2015-07-22 | 河南省四达仙龙实业有限公司 | Spiral propeller |
| CN104925537A (en) * | 2015-05-20 | 2015-09-23 | 浙江中科兴环能设备有限公司 | Material-plug-type spiral feeder |
| CN205413879U (en) * | 2015-07-16 | 2016-08-03 | 安徽中科绿世代环保科技有限公司 | Kitchen garbage spiral feeder |
| CN211468953U (en) * | 2019-09-30 | 2020-09-11 | 长沙昶超机械有限公司 | Variable-pitch bottle feeding auger |
| CN213111186U (en) * | 2020-09-17 | 2021-05-04 | 深圳市泰美瑞环保科技有限公司 | Energy-efficient flying dust screw conveyer |
| CN217149703U (en) * | 2021-12-31 | 2022-08-09 | 郑州运达造纸设备有限公司 | High-efficient spiral feeder |
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