CN116219829A - Antiseized hot regeneration drying cylinder - Google Patents

Antiseized hot regeneration drying cylinder Download PDF

Info

Publication number
CN116219829A
CN116219829A CN202211728649.6A CN202211728649A CN116219829A CN 116219829 A CN116219829 A CN 116219829A CN 202211728649 A CN202211728649 A CN 202211728649A CN 116219829 A CN116219829 A CN 116219829A
Authority
CN
China
Prior art keywords
heating
roller
driving seat
sticking
drying cylinder
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
Application number
CN202211728649.6A
Other languages
Chinese (zh)
Inventor
姚绍民
张爱杰
郭国川
胡亚男
周伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Langfang D&g Machinery Technology Co ltd
Original Assignee
Langfang D&g Machinery Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Langfang D&g Machinery Technology Co ltd filed Critical Langfang D&g Machinery Technology Co ltd
Priority to CN202211728649.6A priority Critical patent/CN116219829A/en
Publication of CN116219829A publication Critical patent/CN116219829A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/08Apparatus for transporting and heating or melting asphalt, bitumen, tar, or the like
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1004Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1013Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/1027Mixing in a rotary receptacle
    • E01C19/1036Mixing in a rotary receptacle for in-plant recycling or for reprocessing, e.g. adapted to receive and reprocess an addition of salvaged material, adapted to reheat and remix cooled-down batches
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The application provides an anti-sticking heat regeneration drying cylinder, which comprises a frame body; the frame body is respectively provided with a stirring component and a heating component; the stirring assembly comprises a driving seat; the driving seat is respectively provided with a roller capable of rotating relatively and a heating sleeve fixed relatively; the heating sleeve is sleeved on the roller, and a closed heating cavity is formed between the heating sleeve and the roller; the bottom of the heating cavity is connected with the heating component, and the top of the heating cavity is connected with the roller through a communicating pipe; one end of the roller close to the communicating pipe is connected with the heating component, and one end far away from the communicating pipe is provided with a collecting flue. According to the technical scheme that this application embodiment provided, through the cover establish heating sleeve on the cylinder to form the heating chamber, cooperation heating element's connection not only can heat the inside of cylinder, can also heat the outside of cylinder, thereby make the barrel temperature of cylinder rise, can satisfy the required heating temperature of surface absorption pitch, can satisfy the heating temperature of pitch reclaimed materials again.

Description

Antiseized hot regeneration drying cylinder
Technical Field
The application relates to the technical field of engineering machinery, in particular to an anti-sticking heat regeneration drying cylinder.
Background
The thermal regeneration means that the old asphalt concrete pavement surface layer is dug or milled, recovered and concentrated to a mixing field, the recovered regenerated raw material is subjected to pretreatment such as crushing and screening according to the need, the treated old asphalt concrete material which can be used secondarily is called as regenerated material for short, the regenerated material contains a certain amount of asphalt, a certain proportion of materials such as new aggregate, new asphalt and regenerant are mixed after being heated and dried by a thermal regeneration drying cylinder, and the materials such as new aggregate, new asphalt and regenerant are heated and mixed by special thermal regeneration asphalt concrete stirring equipment and then transported to a construction field for paving to form the new asphalt concrete pavement structure layer with certain road performance.
The thermal regeneration drying cylinder is a key component of the recycled asphalt concrete stirring equipment, is also one of key equipment essential to pavement construction, and mainly aims to dry and heat recycled materials to a construction specified temperature; at present, the hot regeneration drying cylinder has a plurality of problems in the use process, and because of the adhesion property of the heated asphalt reclaimed materials and the problem that the surface adsorbed asphalt volatilizes to pollute the environment, the heating can only be controlled at the minimum standard, so that the internal adhesion phenomenon of the drying cylinder is serious, and the problems need to be solved.
Disclosure of Invention
In view of the foregoing drawbacks or deficiencies in the prior art, it is desirable to provide an anti-sticking thermal regeneration dryer cartridge.
The application provides an anti-sticking heat regeneration drying cylinder, which comprises a frame body;
the stirring assembly and the heating assembly are respectively arranged on the frame body;
the stirring assembly comprises a driving seat; the driving seat is respectively provided with a roller capable of rotating relatively and a heating sleeve fixed relatively; the heating sleeve is sleeved on the roller, and a closed heating cavity is formed between the heating sleeve and the roller;
the bottom of the heating cavity is connected with the heating component, and the top of the heating cavity is connected with the roller through a communicating pipe;
one end of the roller, which is close to the communicating pipe, is connected with the heating component, and one end of the roller, which is far away from the communicating pipe, is provided with a collecting flue.
Further, at least two groups of lifting wheels are arranged on the driving seat corresponding to the roller; the plurality of groups of lifting wheels are distributed along the axial direction of the roller; the two lifting wheels are in a group and are respectively positioned at two sides of the roller.
Further, external teeth are further arranged on the roller around the circumferential direction; a driving motor is arranged on the driving seat corresponding to the external teeth; the driving motor is connected with the external teeth through gears.
Further, the heating sleeve comprises a plurality of segments; the two ends of the heating sleeve are respectively provided with a first sealing ring for forming the heating cavity with the roller; the heating cavity, the heating component and the communicating pipe are respectively and independently connected.
Further, the collecting flue is connected with the roller through an end cover; the end cover is arranged on the driving seat, is positioned at the end part of the roller and can rotate relative to the roller; the roller is sealed with the end cover through a second sealing ring.
Further, the device also comprises a feeding pipe; the feeding pipe is fixedly arranged on the end cover, and the end part of the feeding pipe is provided with a valve plate capable of being opened and closed.
Further, the heating assembly includes a burner; the burner is fixedly arranged on the frame body, and the output end of the burner is provided with a hot blast stove; the hot blast stove is connected with the heating cavity and the roller through a heating pipeline.
Further, the heat supply pipeline comprises a main pipeline and a branch pipeline; the main pipeline is connected with the hot blast stove; the branch pipelines are respectively arranged on the main pipeline in parallel; control valves are respectively arranged between the main pipeline and each branch pipeline.
The application has the advantages and positive effects that:
according to the technical scheme, the heating sleeve is sleeved on the roller to form the heating cavity, and the heating sleeve is matched with the connection of the heating assembly, so that the inside of the roller can be heated, the outside of the roller can be heated, the temperature of the roller body of the roller is increased, asphalt contained in reclaimed materials in the roller body can be prevented from aging and volatilizing, and asphalt reclaimed materials can reach the heating temperature required by falling off the roller wall to prevent adhesion; meanwhile, the end part of the roller is also provided with a collecting flue, so that volatilized asphalt can be effectively collected, and the pollution to the environment is reduced.
Furthermore, the hot air heating is carried out through the burner matched with the hot air furnace, so that the direct heating of flame is avoided, and the non-aging and less volatilization of asphalt in reclaimed materials are ensured.
Drawings
Fig. 1 is a schematic structural diagram of an anti-sticking thermal regeneration drying cylinder according to an embodiment of the present application.
The text labels in the figures are expressed as: 100-frame body; 200-a driving seat; 210-a roller; 211-external teeth; 212-end caps; 220-heating the sleeve; 221-collecting a flue; 230-communicating pipe; 240-lifting wheels; 250-driving a motor; 260-feeding pipe; 270-butt joint cover; 300-burner; 310-hot blast stove; 320-heating pipeline.
Detailed Description
In order that those skilled in the art may better understand the technical solutions of the present application, the following detailed description of the present application is provided by way of example and illustration only, and should not be construed to limit the scope of the present application in any way.
Referring to fig. 1, the present embodiment provides an anti-sticking thermal regeneration drying cylinder, which includes a frame 100; the top of the frame 100 is provided with a stirring component and the inside is provided with a heating component; the heating component is used for supplying heat to the stirring component; the stirring assembly includes a relatively rotatable drum 210 and a heating sleeve 220; the heating sleeve 220 is sleeved on the roller 210, and forms a closed heating cavity, and is matched with the heating assembly, so that the interior of the roller 210 can be heated, and the exterior of the roller 210 can be heated, thereby ensuring that asphalt contained in the reclaimed materials in the interior is not aged and volatilized less, and ensuring that the asphalt reclaimed materials reach the heating temperature required by falling off the roller wall, and preventing adhesion.
In a preferred embodiment, the frame 100 is provided with a driving seat 200 corresponding to the roller 210; the driving seat 200 is obliquely arranged on the frame body 100, and forms an acute angle with the plane of the frame body 100; the rollers 210 are mounted on the driving base 200 in parallel and can rotate relative to the driving base 200.
Preferably, two sets of lifting wheels 240 are arranged on the driving seat 200 corresponding to the roller 210; the two sets of lift wheels 240 are arranged along the axial direction of the drum 210; two lifting wheels 240 are provided in a group, and are respectively located at two sides of the roller 210, so that the roller 210 can be lifted and can be ensured to rotate relative to the driving seat 200.
Preferably, the drum 210 is further provided with external teeth 211 around the circumferential direction; the external teeth 211 are positioned at the lifting wheel 240, and the roller 210 can be effectively driven to rotate relative to the driving seat 200 by the driving motor 250; the driving motor 250 is fixedly installed on the driving seat 200 and is connected with the external teeth 211 through gears.
Preferably, the heating sleeve 220 is provided with three sections in total; one section is positioned between two groups of lifting wheels 240, and the other two sections are respectively positioned at one side of the two groups of lifting wheels 240 away from each other; the heating sleeve 220 is fixedly installed on the driving seat 200, and both ends thereof are respectively slidably sealed by the first sealing ring and the drum 210, thereby forming a closed heating chamber.
In a preferred embodiment, the end of the drum 210 that is relatively high in the vertical direction is also mounted with an end cap 212; the end cover 212 is mounted on the driving seat 200 and can rotate relative to the roller 210; while the end cap 212 and the roller 210 form a sliding seal with a second seal ring.
Preferably, the end cover 212 is also provided with a collecting flue 221 and a feeding pipe 260 respectively; wherein the collecting flue 221 is disposed along an axial direction of the drum 210 for collecting volatilized asphalt and pollutants generated by heating; the feeding pipe 260 is obliquely installed on the end cover 212, and is used for feeding materials into the roller 210; meanwhile, one end of the feed pipe 260, which is far away from the end cover 212, is also provided with a reversible valve plate; the on-off of the feeding pipe 260 can be effectively controlled through the overturning valve plate, so that normal feeding can be ensured, and pollutants can be prevented from leaking.
In a preferred embodiment, the end of the roller 210 remote from the end cap 212 is also provided with a docking hood 270; the docking cover 270 is fixedly installed on the driving seat 200 and can rotate relative to the roller 210; and a third sealing ring is further provided between the drum 210 and the docking cover 270, thereby forming a sliding seal.
Preferably, the docking cover 270 is also provided with a discharge hole; the discharge opening is located below the docking cover 270, is circular, and is provided with a matched flange for docking and discharging with the outside.
In a preferred embodiment, the heating assembly includes a burner 300; the burner 300 is fixedly arranged on the frame body 100, and the output end is provided with a hot blast stove 310; the hot blast stove 310 is connected to the heating chamber and the drum 210 through a heating pipe 320, thereby heating the inside and outside of the drum 210 at the same time.
Preferably, the heating pipe 320 includes a main pipe and a branch pipe; wherein the main pipe is connected with the hot blast stove 310, and the branch pipes are respectively installed on the main pipe in parallel for heating each heating chamber and the drum 210.
Preferably, a bypass duct for supplying heat to the drum 210 is connected to the docking cover 270.
Preferably, control valves are also respectively arranged between the main pipeline and each branch pipeline, and the opening between the branch pipeline and the main pipeline can be effectively controlled through the control valves, so that the heating temperature is controlled.
Preferably, the heating sleeve is further provided with a communicating tube 230; the communicating tube 230 communicates with each heating chamber, respectively, and also communicates with the docking cover 270 at one end thereof for continuously inputting hot air in the heating chamber into the drum 210, thereby improving heat utilization efficiency.
Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. The foregoing is merely a preferred embodiment of the present application, and it should be noted that, due to the limited text expressions, there is objectively no limit to the specific structure, and it will be apparent to those skilled in the art that numerous modifications, adaptations or variations can be made therein without departing from the principles of the present invention, and the above technical features can be combined in any suitable manner; such modifications, variations and combinations, or the direct application of the concepts and aspects of the invention in other applications without modification, are intended to be within the scope of this application.

Claims (8)

1. An anti-sticking heat regeneration drying cylinder is characterized by comprising a frame body (100);
the stirring assembly and the heating assembly are respectively arranged on the frame body (100);
the stirring assembly comprises a driving seat (200); the driving seat (200) is respectively provided with a roller (210) which can rotate relatively and a heating sleeve (220) which is fixed relatively; the heating sleeve (220) is sleeved on the roller (210) and forms a closed heating cavity with the roller (210);
the bottom of the heating cavity is connected with the heating component, and the top of the heating cavity is connected with the roller (210) through a communicating pipe (230);
one end of the roller (210) close to the communicating pipe (230) is connected with the heating assembly, and one end far away from the communicating pipe (230) is provided with a collecting flue (221).
2. The anti-sticking heat regeneration drying cylinder according to claim 1, characterized in that at least two groups of lifting wheels (240) are arranged on the driving seat (200) corresponding to the roller (210); a plurality of groups of lifting wheels (240) are arranged along the axial direction of the roller (210); the two lifting wheels (240) are arranged in a group and are respectively positioned at two sides of the roller (210).
3. The anti-sticking heat regeneration drying cylinder according to claim 2, characterized in that the cylinder (210) is further provided with external teeth (211) around the circumferential direction; a driving motor (250) is arranged on the driving seat (200) corresponding to the external teeth (211); the driving motor (250) is connected with the external teeth (211) through gears.
4. The anti-sticking thermal regeneration dryer cartridge of claim 1, wherein said heating sleeve (220) comprises a plurality of segments; the two ends of the heating sleeve (220) are respectively provided with a first sealing ring for forming the heating cavity with the roller (210); the heating cavities, the heating components and the communicating pipes (230) are respectively and independently connected.
5. The anti-sticking thermal regeneration drying cylinder according to claim 1, characterized in that the collecting flue (221) is connected with the drum (210) by an end cover (212); the end cover (212) is arranged on the driving seat (200), is positioned at the end part of the roller (210) and can rotate relative to the roller (210); the space between the roller (210) and the end cover (212) is sealed by a second sealing ring.
6. The anti-sticking thermal regeneration dryer cartridge of claim 5, further comprising a feed tube (260); the feeding pipe (260) is fixedly arranged on the end cover (212), and the end part of the feeding pipe is provided with a valve plate capable of being opened and closed.
7. The anti-stiction thermal regeneration dryer cartridge of claim 1, wherein said heating assembly comprises a burner (300); the burner (300) is fixedly arranged on the frame body (100), and the output end is provided with a hot blast stove (310); the hot blast stove (310) is connected with the heating cavity and the roller (210) through a heating pipeline (320).
8. The anti-sticking thermal regeneration drying cartridge of claim 1, wherein the heating conduit (320) comprises a main conduit and a bypass conduit; the main pipeline is connected with a hot blast stove (310); the branch pipelines are respectively arranged on the main pipeline in parallel; control valves are respectively arranged between the main pipeline and each branch pipeline.
CN202211728649.6A 2022-12-30 2022-12-30 Antiseized hot regeneration drying cylinder Pending CN116219829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211728649.6A CN116219829A (en) 2022-12-30 2022-12-30 Antiseized hot regeneration drying cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211728649.6A CN116219829A (en) 2022-12-30 2022-12-30 Antiseized hot regeneration drying cylinder

Publications (1)

Publication Number Publication Date
CN116219829A true CN116219829A (en) 2023-06-06

Family

ID=86581604

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211728649.6A Pending CN116219829A (en) 2022-12-30 2022-12-30 Antiseized hot regeneration drying cylinder

Country Status (1)

Country Link
CN (1) CN116219829A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101168951A (en) * 2007-12-11 2008-04-30 河南陆德筑机股份有限公司 Asphalt mixture regenerating heating stirring roller
CN202466361U (en) * 2011-12-20 2012-10-03 中联重科股份有限公司 Asphalt mixture thermal regeneration equipment and drying roller
CN110373971A (en) * 2019-08-13 2019-10-25 陕西达刚筑路环保设备有限公司 A kind of heating device adding asphalt-regenerating material
CN214328391U (en) * 2020-12-31 2021-10-01 北京路新沥青混凝土有限公司 Antiseized regeneration cylinder
CN214362689U (en) * 2020-12-31 2021-10-08 北京路新沥青混凝土有限公司 Reclaimed asphalt heating and drying roller
CN217131686U (en) * 2022-02-24 2022-08-05 福建南方路面机械股份有限公司 Drying system for heating recycled asphalt aggregate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101168951A (en) * 2007-12-11 2008-04-30 河南陆德筑机股份有限公司 Asphalt mixture regenerating heating stirring roller
CN202466361U (en) * 2011-12-20 2012-10-03 中联重科股份有限公司 Asphalt mixture thermal regeneration equipment and drying roller
CN110373971A (en) * 2019-08-13 2019-10-25 陕西达刚筑路环保设备有限公司 A kind of heating device adding asphalt-regenerating material
CN214328391U (en) * 2020-12-31 2021-10-01 北京路新沥青混凝土有限公司 Antiseized regeneration cylinder
CN214362689U (en) * 2020-12-31 2021-10-08 北京路新沥青混凝土有限公司 Reclaimed asphalt heating and drying roller
CN217131686U (en) * 2022-02-24 2022-08-05 福建南方路面机械股份有限公司 Drying system for heating recycled asphalt aggregate

Similar Documents

Publication Publication Date Title
CN206233064U (en) One kind insulation hopper and Hot-blast Heating type asphalt pavement maintanance truck
CN101413752B (en) Heating and drying roller
CN205650605U (en) Restore organic contaminated soil's sectional type heating, modularization thermal desorption equipment
CN103132444B (en) Waste asphalt pavement thermal regeneration maintenance vehicle
CN205368958U (en) Bituminous mixture heating mix device that regeneration of bituminous paving heat was cared car
CN103993549B (en) A kind of infrared radiation and hot blast composite heating type asphalt pavement maintanance truck
CN218539506U (en) Sludge drying device
CN210367390U (en) Sectional type oily sludge pyrolysis treatment device
CN211489034U (en) Site contaminated soil heat treatment repair equipment
KR101217055B1 (en) A regenerating apparatus and the method having double drums
CN219604088U (en) Antiseized hot regeneration drying cylinder
CN101135536A (en) Drying furnace of metallization ball and drying method thereof
CN116219829A (en) Antiseized hot regeneration drying cylinder
CN105970771A (en) Plant-mixing thermal regeneration drying rotary drum for asphalt
CN106608649A (en) Melting furnace for byproduct industrial salt treatment and treatment method
CN112246853A (en) Efficient energy-saving thermal desorption kiln body mechanism for repairing organic contaminated soil
CN108485686B (en) Double-row mixed flow internal and external dynamic heating solid organic matter pyrolysis combined device
CN207958258U (en) A kind of cracker assisting heating
CN107999529A (en) A kind of rotary kiln thermal desorption device for being evenly heated material
CN206786727U (en) Rubbish charcoal gas coproduction monotubular cracking apparatus and its integrated system
CN106702852B (en) Pitch feed roller and asphalt material processing system
CN205501087U (en) Mud heat drying device
CN207857530U (en) A kind of rotary kiln thermal desorption device being evenly heated material
TWM614264U (en) Complete circulated drying equipment of indirect exhaust gas thermal desorption
CN211876678U (en) Drying equipment and cracking system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20230606