CN110470114A - A kind of drum-type timber drying unit - Google Patents
A kind of drum-type timber drying unit Download PDFInfo
- Publication number
- CN110470114A CN110470114A CN201910714633.1A CN201910714633A CN110470114A CN 110470114 A CN110470114 A CN 110470114A CN 201910714633 A CN201910714633 A CN 201910714633A CN 110470114 A CN110470114 A CN 110470114A
- Authority
- CN
- China
- Prior art keywords
- drying
- motor
- timber
- placing tube
- side board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/022—Arrangements of drives, bearings, supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/026—Arrangements for charging or discharging the materials to be dried, e.g. discharging by reversing drum rotation, using spiral-type inserts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
- F26B11/0404—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis with internal subdivision of the drum, e.g. for subdividing or recycling the material to be dried
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/003—Handling, e.g. loading or unloading arrangements for articles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/16—Chambers, containers, receptacles of simple construction mainly closed, e.g. drum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
- F26B2210/16—Wood, e.g. lumber, timber
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
A kind of drum-type timber drying unit, belongs to timber manufacture field；Including timber placing tube, roller fixed ring, side board, central cylinder, driving motor, assist motor, motor, decelerating motor, sliding block, baker, center Drying, middle layer Drying, outer layer Drying, discharging device, left hair dryer, loose roll and drive roll, the left and right sides is symmetrically arranged with side board at the top of timber placing tube, the left and right sides is symmetrically arranged with roller fixed ring at the top of timber placing tube, roller fixed ring is located between side board, side board upper end is equipped with central cylinder, drive roll and left hair dryer are successively arranged on side board from top to bottom, right hair dryer and side board are articulated and connected, driving motor is symmetrically arranged at left and right sides of central cylinder bottom, assistance motor is equipped on driving motor, motor lower end is assisted to be equipped with motor, outer layer Drying is installed among central cylinder bottom.
Description
Technical field
The present invention relates to timber processing technique fields, are specifically exactly a kind of drum-type timber drying unit.
Background technique
Currently, timber drying equipment uses timber dryer of the waste wood as heat source, in order to guarantee timber dries quantity,
In addition to burner hearth, often in addition add a steam oven, the proportion for making drying equipment adjust temperature and humidity is relatively difficult, it is difficult to dry
Do it is non-discolouring, do not split, indeformable timber.The transformation crux of such equipment is that grasping matching for temperature and humidity when dries
Dry hydrofuge.And this common timber dryer operations are many and diverse, dry mass is not easy to control, and heat energy is using insufficient；Again
Mostly indoor location is unable to strange land removal, this carrys out very big inconvenience in dry work belt to timber, since virgin wood contains largely
Moisture, does not allow easy to maintain under field conditions (factors), and before not doing drying and processing, moisture natural evaporation can make timber different journeys occur
The deformation of degree seriously affects the quality and durability degree of timber, after the completion of timber drying, it is also necessary to which manpower is removed from drying box
Out, not only waste of manpower, also increase cost, and since people may go out heart general idea, the temperature inside the box is excessively high also easily to cause fire.
Summary of the invention
To solve the above problems, the present invention provides a kind of drum-type timber drying units.
The technical scheme adopted by the invention to solve the technical problem is that: a kind of drum-type timber drying unit, including wood
Expect placing tube, roller fixed ring, side board, central cylinder, driving motor, assist motor, motor, decelerating motor, sliding block, drying
Device, center Drying, middle layer Drying, outer layer Drying, discharging device, left hair dryer, loose roll and drive roll, timber are placed
The cylinder top left and right sides is symmetrically arranged with side board, and the left and right sides is symmetrically arranged with roller fixed ring at the top of timber placing tube, and roller is solid
Determine ring to be located between side board, side board upper end is equipped with central cylinder, be successively arranged on side board from top to bottom drive roll and
Left hair dryer, right hair dryer and side board are articulated and connected, and driving motor, driving electricity are symmetrically arranged at left and right sides of central cylinder bottom
It is equipped with assistance motor on machine, assists motor lower end to be equipped with motor, outer layer Drying is installed, outside among central cylinder bottom
It is equipped with discharging device on rear side of layer Drying, roller fixed ring middle top is symmetrically arranged with middle layer Drying, on the Drying of middle layer
Slidingtype is connected with sliding block, is equipped with loose roll between upper end of slide block and left hair dryer top, and sliding block side is equipped with decelerating motor,
Discharging device is engaged with decelerating motor, and the sliding block other side is equipped with baker, and baker is equipped with center Drying, and roller is fixed
It is equipped with baffle above ring, baffle is located on side board, and baffle bottom is equipped with right hair dryer.
As optimization, the right hair dryer is by air compressor fixed case, air compressor, solenoid electric valve, high pressure
Air outlet duct, high pressure air jet nozzles composition, the air compressor fixed case are fixedly welded the upper left inside movable frame
Angle, the air compressor are fixed inside air compressor fixed case, and are fixedly connected by support member, the high pressure
Air outlet duct is fixedly welded in air compressor lower end, and through air compressor fixed case, the solenoid electric valve
It is fixed at pressure-air output channel outer surface, and phase fitting between the two, the high pressure air jet nozzles are equipped with two or more,
And it is vertical on the right side of pressure-air output channel.
As optimization, the center Drying is by vertical dust-proof partition board, the second motor, forced-ventilated fan, protection net, strong
Exhaust outlet composition, the forced-ventilated air port are fixedly welded in movable frame inner wall, and the vertical dust-proof partition board is fixedly welded in two
Between forced-ventilated air port, second motor is fixedly welded on the right side of vertical dust-proof partition board, and the forced-ventilated fan is fixed to be nested in the
Outer surface on the right side of two motors, and the two matches flexible connection, the protection net is fixedly welded the notch on the right side of movable frame
Place.
As optimization, the timber placing tube further includes drying equipment timber placing tube, the drying equipment timber
The two sides of placing tube have timber drying wood placing tube, are equipped with drying equipment, humidifier, institute in the drying equipment case
Main air blower is installed, the main air blower is connect with intake stack, return air duct respectively, the humidification on the drying equipment stated
Device is connect with steam unit.
As optimization, the intake stack, the return air duct extend to the timber drying wood placing tube
It is interior, humidifying spraying nozzle, interior circulating fan, temperature sensor, humidity sensor are installed in the timber drying wood placing tube,
The temperature sensor is connect with temperature measurement and control instrument, and the humidity sensor is connect with humidity measure and control device.
The beneficial effects of the present invention are: compared with prior art, a kind of drum-type timber drying unit of the invention meets
Timber does the essential condition of bath, and interior circulating fan is used to from intake stack send hot gas and steam to rollway, and promotion follows bad pair
Stream, toward floating, temperature is low to sink the high air of temperature, promotes rate of drying, is placed by being mounted on timber drying wood
Temperature sensor, humidity sensor in cylinder carry out control drying process to temperature, the humidity in case.Such timber dryer
It is easy to operate and safe, can guarantee that quality device structure is simple again, dress takes timber convenient, is able to carry out flash baking, energy to timber
It is enough that effectively the temperature and humidity in drying course is measured, the qualification rate of timber drying is improved, invention achieves drying
Speed is fast, good drying effect, effect easy to operate, using the present invention can fast and efficiently drying wood, improve work effect
Rate.
Detailed description of the invention
Attached drawing 1 is axis side schematic diagram of the invention.
Attached drawing 2 is schematic diagram of internal structure of the present invention.
Attached drawing 3 is right side view of the present invention.
Attached drawing 4 is schematic elevation view of the present invention.
Attached drawing 5 is baffle schematic diagram of the present invention.
Attached drawing 6 is discharging device schematic diagram of the present invention.
Wherein, 1- timber placing tube, 2- roller fixed ring, 3- side board, 4- central cylinder, 5- driving motor, 6- are assisted
Motor, 7- motor, 8- decelerating motor, 9- sliding block, 10- baker, the center 11- Drying, the middle layer 12- Drying, 13- outer layer dry
Dry cylinder, 14- discharging device, the left hair dryer of 15-, 16- loose roll, 17- drive roll, 18- baffle, the right hair dryer of 19-.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In embodiment as shown in Figure 1, a kind of drum-type timber drying unit includes timber placing tube 1, roller fixed ring
2, side board 3, central cylinder 4, rotating electric machine 5, assistance motor 6, motor 7, decelerating motor 8, sliding block 9, baker 10, center are dried
Dry cylinder 11, middle layer Drying 12, outer layer Drying 13, discharging device 14, left hair dryer 15, loose roll 16 and drive roll 17, wood
The 1 top left and right sides of material placing tube is symmetrically arranged with side board 3, and the 1 top left and right sides of timber placing tube is symmetrically arranged with roller and fixes
Ring 2, roller fixed ring 2 are located between side board 3, and 3 upper end of side board is equipped with central cylinder 4, on side board 3 from top to bottom according to
Secondary to be equipped with drive roll 17 and left hair dryer 15, left hair dryer 15 is articulated and connected with side board 3, at left and right sides of 4 bottom of central cylinder
It is symmetrically arranged with rotating electric machine 5, is equipped on driving motor 5 and assists motor 6,6 lower end of motor is assisted to be equipped with motor 7, center rolling
Cylinder is equipped with outer layer Drying 13 among 4 bottoms, is equipped with discharging device 14 on rear side of outer layer Drying 13, at the top of roller fixed ring in
Portion is symmetrically arranged with middle layer Drying 12, and slidingtype is connected with sliding block 9,9 upper end of sliding block and left hair dryer on middle layer Drying 12
It is equipped with loose roll 16 between 15 tops, 9 side of sliding block is equipped with decelerating motor 8, and discharging device 14 is engaged with decelerating motor 8, sliding
9 other side of block is equipped with baker 10, and baker 10 is equipped with center Drying 11.
Further include having baffle 18, baffle 18 is equipped with above roller fixed ring 2, baffle 18 is located on side board 3.
It further include having right hair dryer 19,18 bottom of baffle is equipped with right hair dryer 19.
Working principle: assisting motor 6 to work, motor 7 driven to move down in use, staff controls, when motor 7 moves
After moving suitable position, closes and assist motor 6.Staff is clamped the timber for needing to dry using motor 7, when timber clamps
Afterwards, control assists motor 6 to shorten, and motor 7 is driven to move up, and after assisting motor 6 to reset, closes and assists motor 6.Work people
Member's control baker 10 works, then controls outer layer Drying 13 and rotate clockwise, and discharging device 14 is driven to rotate clockwise, because
Discharging device 14 is engaged with decelerating motor 8, so discharging device 14 can make the decelerating motor 8 in left side to moving up when rotating clockwise
It is dynamic, move down the decelerating motor 8 on right side, after outer layer Drying 13 turns an angle, control outer layer Drying 13 is inverse
Hour hands rotation, drives discharging device 14 to rotate counterclockwise, because discharging device 14 is engaged with decelerating motor 8, discharging device
14 when rotating counterclockwise the decelerating motor 8 in left side can move down, and move up the decelerating motor 8 on right side, when outer layer dries
It after dry cylinder 13 rotates counterclockwise certain angle, then controls outer layer Drying 13 and rotates clockwise, repeat above-mentioned movement.Constantly control
Outer layer Drying 13 processed alternate rotation clockwise and anticlockwise, moves up and down decelerating motor 8 constantly, to drive baker
10 constantly move up and down, equably drying wood, while controlling the rotation of driving motor 5, drive timber rotation, can make timber
It is heated evenly, dries timber equably.Because baker 10 is equipped with center Drying 11, it can prevent baker 10 from being hit
It is bad, increase the service life of baker 10.While drying wood, controls left hair dryer 15 and work, because of left hair dryer 15
Top and sliding block are equipped with loose roll 16 between 9 top, so passing through loose roll 16 and gravity while sliding block 9 moves up and down
Effect make left hair dryer 15 alternate rotation clockwise and anticlockwise by a small margin, the blowing range of left hair dryer 15 can be increased.
After timber drying, control baker 10 stops working, and closes driving motor 5, closes outer layer Drying 13, closes left hair dryer
15.Staff, which controls, assists motor 6 to extend, and timber is driven to move down, and after timber is moved to suitable position, closes and assists
Motor 6, staff take out timber from motor 7.Above-mentioned movement is repeated, it can rapidly drying wood.In drying wood
When, staff can be sitting in roller fixed ring 2, relieve fatigue, and improve working efficiency.
Because further including having baffle 18, baffle 18 is equipped with above roller fixed ring 2, baffle 18 is located on side board 3, gear
Plate 18 can prevent sawdust and water droplet on timber etc. from falling with staff, protect worker safety.Because further including
There is right hair dryer 19,18 bottom of baffle is equipped with right hair dryer 19, when staff is sitting in roller fixed ring 2, if work
Personnel feel hotter, can control right hair dryer 19 and work, cool down for staff, prevent staff's heatstroke, as work people
When member does not need blowing, right hair dryer 19 is closed.
A kind of drum-type timber drying unit of the invention, meets the essential condition that timber does bath, and interior circulating fan is used for
Hot gas and steam are sent from intake stack to rollway, promotion follows bad convection current, and for the high air of temperature toward floating, temperature is low down
It is heavy, promote rate of drying, by the temperature sensor that is mounted in timber drying wood placing tube, humidity sensor in case
Temperature, humidity carry out control drying process.Such timber dryer operations handy and safe can guarantee quality device structure letter again
Single, dress takes timber convenient, is able to carry out flash baking to timber, can effectively survey to the temperature and humidity in drying course
Amount improves the qualification rate of timber drying, invention achieves drying rates fast, good drying effect, effect easy to operate, benefit
With the present invention can fast and efficiently drying wood, improve working efficiency.
Above-mentioned specific embodiment is only specific case of the invention, and scope of patent protection of the invention includes but is not limited to
The product form and style of above-mentioned specific embodiment, a kind of any drum-type timber drying for meeting claims of the present invention
The appropriate changes or modifications that device and any person of an ordinary skill in the technical field do it should all be fallen into of the invention
Scope of patent protection.
Claims (5)
1. a kind of drum-type timber drying unit, it is characterised in that: including timber placing tube, roller fixed ring, side board, center
Roller, driving motor assist motor, motor, decelerating motor, sliding block, baker, center Drying, middle layer Drying, outer layer to dry
Dry cylinder, discharging device, left hair dryer, loose roll and drive roll, the timber placing tube top left and right sides are symmetrically arranged with side board, wood
The left and right sides is symmetrically arranged with roller fixed ring at the top of material placing tube, and roller fixed ring is located between side board, and side board upper end is set
There is central cylinder, be successively arranged drive roll and left hair dryer on side board from top to bottom, right hair dryer hingedly connects with side board
It connects, is symmetrically arranged with driving motor at left and right sides of central cylinder bottom, assistance motor is equipped on driving motor, assist motor lower end
It is equipped with motor, outer layer Drying is installed among central cylinder bottom, is equipped with discharging device on rear side of outer layer Drying, roller is solid
Determine ring middle top and be symmetrically arranged with middle layer Drying, slidingtype is connected with sliding block on the Drying of middle layer, and upper end of slide block is blown with a left side
Loose roll is equipped between at the top of blower, sliding block side is equipped with decelerating motor, and discharging device is engaged with decelerating motor, and sliding block is another
Side is equipped with baker, and baker is equipped with center Drying, is equipped with baffle above roller fixed ring, baffle is located at side board
On, baffle bottom is equipped with right hair dryer.
2. a kind of drum-type timber drying unit according to claim 1, it is characterised in that: the right hair dryer is by sky
Air compressor fixed case, air compressor, solenoid electric valve, pressure-air output channel, high pressure air jet nozzles composition, the sky
Air compressor fixed case is fixedly welded the upper left corner inside movable frame, and it is solid that the air compressor is fixed at air compressor
To determine inside case, and is fixedly connected by support member, the pressure-air output channel is fixedly welded in air compressor lower end,
And through air compressor fixed case, the solenoid electric valve is fixed at pressure-air output channel outer surface, and the two
Between phase fitting, the high pressure air jet nozzles are equipped with two or more, and are vertical on the right side of pressure-air output channel.
3. a kind of drum-type timber drying unit according to claim 1, it is characterised in that: the center Drying by
Vertical dust-proof partition board, the second motor, forced-ventilated fan, protection net, forced-ventilated air port composition, the forced-ventilated air port is fixedly welded in work
Dynamic frame inner wall, the vertical dust-proof partition board are fixedly welded between two forced-ventilated air ports, second motor be fixedly welded in
On the right side of vertical dust-proof partition board, the forced-ventilated fan is fixed to be nested in outer surface on the right side of the second motor, and the two matches activity even
It connects, the protection net is fixedly welded the indentation, there on the right side of movable frame.
4. a kind of drum-type timber drying unit according to claim 1, it is characterised in that: the timber placing tube is also
Including drying equipment timber placing tube, the two sides of the drying equipment timber placing tube have timber drying wood placing tube,
Drying equipment, humidifier are installed in the drying equipment case, main air blower, the master are installed on the drying equipment
Blower is connect with intake stack, return air duct respectively, and the humidifier is connect with steam unit.
5. a kind of drum-type timber drying unit according to claim 4, it is characterised in that: the intake stack, institute
The return air duct stated extends in the timber drying wood placing tube, is equipped in the timber drying wood placing tube
Humidifying spraying nozzle, interior circulating fan, temperature sensor, humidity sensor, the temperature sensor are connect with temperature measurement and control instrument,
The humidity sensor is connect with humidity measure and control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910714633.1A CN110470114A (en) | 2019-08-04 | 2019-08-04 | A kind of drum-type timber drying unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910714633.1A CN110470114A (en) | 2019-08-04 | 2019-08-04 | A kind of drum-type timber drying unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110470114A true CN110470114A (en) | 2019-11-19 |
Family
ID=68509440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910714633.1A Pending CN110470114A (en) | 2019-08-04 | 2019-08-04 | A kind of drum-type timber drying unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110470114A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111806852A (en) * | 2020-08-11 | 2020-10-23 | 衡阳嵘昇生物颗粒有限公司 | Timber is deposited and is used dampproof device |
-
2019
- 2019-08-04 CN CN201910714633.1A patent/CN110470114A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111806852A (en) * | 2020-08-11 | 2020-10-23 | 衡阳嵘昇生物颗粒有限公司 | Timber is deposited and is used dampproof device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191119 |
|
| WD01 | Invention patent application deemed withdrawn after publication |