CN111069223A - High-efficient broken processing apparatus of construction waste - Google Patents

High-efficient broken processing apparatus of construction waste Download PDF

Info

Publication number
CN111069223A
CN111069223A CN201811226967.6A CN201811226967A CN111069223A CN 111069223 A CN111069223 A CN 111069223A CN 201811226967 A CN201811226967 A CN 201811226967A CN 111069223 A CN111069223 A CN 111069223A
Authority
CN
China
Prior art keywords
crushing
construction waste
fixedly connected
crushing box
motor
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
CN201811226967.6A
Other languages
Chinese (zh)
Inventor
魏小东
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN201811226967.6A priority Critical patent/CN111069223A/en
Publication of CN111069223A publication Critical patent/CN111069223A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B02C21/02—Transportable disintegrating plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
    • B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/286—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/42—Driving mechanisms; Roller speed control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/58—Construction or demolition [C&D] waste

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

The invention discloses a high-efficiency crushing treatment device for construction waste, which comprises a crushing box, wherein a first motor is fixedly installed at the top of the right side of the crushing box, an output shaft of the first motor is sleeved with a driving belt pulley, the front end and the rear end of an inner cavity of the crushing box are movably connected with first crushing rollers through bearings, a rotating rod penetrates through the back surface of the crushing box and extends to the inner cavity of the crushing box, and a second crushing roller is fixedly connected with the rotating rod. According to the invention, the first motor, the driving belt pulley, the belt, the driven belt pulley, the first crushing roller and the second crushing roller are arranged, so that the effect of crushing the construction waste is achieved, the effect of discharging the crushed construction waste out of the crushing box is achieved by arranging the second motor and the conveying roller, and the problems that the operation is performed by only depending on manpower, time and labor are wasted, the working efficiency is low, the construction waste cannot be crushed quickly, and the construction progress of the engineering is influenced are solved.

Description

High-efficient broken processing apparatus of construction waste
Technical Field
The invention relates to the technical field of construction waste treatment, in particular to a high-efficiency crushing treatment device for construction waste.
Background
The construction waste is solid waste generated in the process of building, rebuilding, expanding or demolishing a building, and can be divided into construction waste and demolition construction waste according to different generation sources of the construction waste, the construction waste is solid waste generated in a new building, rebuilding or expanding project as the name suggests, the demolition construction waste is construction waste generated in the process of demolishing the building, powder of the construction waste can be used as concrete or other fillers, the waste also comprises blocks, if the block construction waste is crushed, the operation is carried out by manpower alone, time and labor are wasted, the working efficiency is low, the construction waste cannot be crushed quickly, and the construction progress of the project is influenced.
Disclosure of Invention
The invention aims to provide a high-efficiency crushing treatment device for construction waste, which has the advantage of high material preparation rate and solves the problems that the operation is carried out by only manpower, the time and the labor are wasted, the working efficiency is low, the construction waste cannot be crushed quickly, and the construction progress of a project is influenced.
In order to achieve the purpose, the invention provides the following technical scheme: a high-efficiency crushing treatment device for construction waste comprises a crushing box, wherein a first motor is fixedly mounted at the top of the right side of the crushing box, an output shaft of the first motor is sleeved with a driving belt pulley, the front end and the rear end of the inner cavity of the crushing box are both movably connected with a first crushing roller through bearings, a rotating rod penetrates through the back of the crushing box and extends to the inner cavity of the crushing box, a second crushing roller is fixedly connected with the inner cavity of the crushing box, one side, away from the rotating rod, of the second crushing roller is movably connected with the inner wall of the crushing box through a rotating shaft, the second crushing roller is meshed with the first crushing roller, a driven belt pulley is sleeved at one end, located outside the crushing box, of the rotating rod, the driven belt pulley is in transmission connection with the driving belt pulley through a belt, a second motor is fixedly mounted at the left bottom of the crushing box, and a conveying roller is fixedly, one end of the conveying roller, which is far away from the output shaft of the second motor, penetrates through the crushing box and extends to the inner cavity of the crushing box.
Preferably, the center of the top of the crushing box is communicated with a feeding pipe, and the bottom of the right side of the crushing box is communicated with a discharging pipe.
Preferably, the bottom of the first motor is fixedly connected with a mounting seat, and the left side of the mounting seat is fixedly connected with the right side of the crushing box.
Preferably, the equal fixedly connected with guide plate in both sides of broken incasement wall, one side fixedly connected with bracing piece that broken incasement wall was kept away from to the guide plate, one side that the guide plate was kept away from to the bracing piece and the inner wall fixed connection of broken case.
Preferably, the equal fixedly connected with sleeve pipe in both sides of broken bottom of the case portion, the top fixedly connected with spring of sleeve pipe inner chamber, one side fixedly connected with landing leg at sleeve pipe inner chamber top is kept away from to the spring, there is the walking wheel bottom of landing leg through loose axle swing joint.
Preferably, the sliding grooves are formed in the two sides of the inner wall of the sleeve, the sliding blocks are connected to the inner cavities of the sliding grooves in a sliding mode, and one sides, far away from the inner cavities of the sliding grooves, of the sliding blocks are fixedly connected with the supporting legs.
Preferably, the bottom of the left side of the inner cavity of the crushing box is fixedly connected with a push rod, and one end, far away from the crushing box, of the push rod is sleeved with an anti-skidding sleeve.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the first motor, the driving belt pulley, the belt, the driven belt pulley, the first crushing roller and the second crushing roller are arranged, so that the effect of crushing the construction waste is achieved, the effect of discharging the crushed construction waste out of the crushing box is achieved by arranging the second motor and the conveying roller, and the problems that the operation is performed by only depending on manpower, time and labor are wasted, the working efficiency is low, the construction waste cannot be crushed quickly, and the construction progress of the engineering is influenced are solved.
2. According to the invention, the effect of facilitating pouring and discharging of construction waste is achieved by arranging the feeding pipe and the discharging pipe, the effect of stably supporting the first motor is achieved by arranging the mounting seat, the situation that the first motor falls off during working is avoided, the effect of guiding the crushed construction waste is achieved by arranging the guide plate and the support rod, the support rod achieves the effect of supporting the guide plate, the sleeve pipe, the spring, the support leg and the walking wheel are arranged, the effect of facilitating moving of the device is achieved, the effect of damping the device is achieved, the effect of balancing and supporting the support leg is achieved by arranging the sliding groove and the sliding block, meanwhile, the friction force between the support leg and the sleeve pipe is reduced, and the effect of facilitating pushing of the device is achieved by arranging the push rod.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the active pulley of the present invention;
FIG. 3 is an enlarged view of a portion of A in FIG. 1 according to the present invention.
In the figure: 1 crushing case, 2 first motor, 3 initiative belt pulley, 4 first crushing roller, 5 bull stick, 6 second crushing roller, 7 driven belt pulley, 8 belts, 9 second motor, 10 conveying rollers, 11 inlet pipes, 12 discharging pipes, 13 mount pads, 14 guide plates, 15 bracing pieces, 16 sleeve pipes, 17 spring, 18 landing leg, 19 walking wheel, 20 spout, 21 slider, 22 push rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a high-efficiency crushing treatment device for construction waste comprises a crushing box 1, wherein a feed pipe 11 is communicated with the center of the top of the crushing box 1, a discharge pipe 12 is communicated with the bottom of the right side of the crushing box 1, the feeding pipe 11 and the discharge pipe 12 are arranged to play a role in facilitating pouring and discharging the construction waste, guide plates 14 are fixedly connected to both sides of the inner wall of the crushing box 1, a support rod 15 is fixedly connected to one side of the guide plate 14 away from the inner wall of the crushing box 1, one side of the support rod 15 away from the guide plate 14 is fixedly connected with the inner wall of the crushing box 1, the guide plate 14 and the support rod 15 are arranged to play a role in guiding the crushed construction waste, the support rod 15 plays a role in supporting the guide plate 14, sleeves 16 are fixedly connected to both sides of the bottom of the crushing box 1, and springs, the side of the spring 17 far away from the top of the inner cavity of the sleeve 16 is fixedly connected with a supporting leg 18, the bottom of the supporting leg 18 is movably connected with a walking wheel 19 through a movable shaft, the sleeve 16, the spring 17, the supporting leg 18 and the walking wheel 19 are arranged, so that the effect of facilitating the movement of the device is achieved, the effect of damping the device is achieved, sliding grooves 20 are formed in two sides of the inner wall of the sleeve 16, sliding blocks 21 are connected to the inner cavity of the sliding grooves 20 in a sliding mode, one side, far away from the inner cavity of the sliding grooves 20, of each sliding block 21 is fixedly connected with the supporting leg 18, the effect of balancing and supporting the supporting leg 18 is achieved through the arrangement of the sliding grooves 20 and the sliding blocks 21, meanwhile, the friction force between the supporting leg 18 and the sleeve 16 is reduced, a push rod 22 is fixedly connected to the bottom of the left side of the inner cavity of the crushing box 1, one, the bottom of the first motor 2 is fixedly connected with an installation seat 13, the left side of the installation seat 13 is fixedly connected with the right side of the crushing box 1, the installation seat 13 is arranged to play a role of stably supporting the first motor 2 and avoid the situation that the first motor 2 falls down when in work, an output shaft of the first motor 2 is sleeved with a driving belt disc 3, the front end and the rear end of an inner cavity of the crushing box 1 are movably connected with a first crushing roller 4 through bearings, a rotating rod 5 penetrates through the back surface of the crushing box 1, the rotating rod 5 extends to the inner cavity of the crushing box 1 and is fixedly connected with a second crushing roller 6, one side of the second crushing roller 6, which is far away from the rotating rod 5, is movably connected with the inner wall of the crushing box 1 through a rotating shaft, the second crushing roller 6 is meshed with the first crushing roller 4, one end of the rotating rod 5, which is positioned outside the crushing box 1, is sleeved with a driven belt disc 7, the driven belt disc 7 is in transmission, broken 1 left bottom fixed mounting of case has second motor 9, the output shaft fixedly connected with conveying roller 10 of second motor 9, conveying roller 10 keeps away from the one end of second motor 9 output shaft and runs through broken case 1 and extend to the inner chamber of broken case 1, through setting up first motor 2, initiative belt pulley 3, belt 8, driven belt pulley 7, first crushing roller 4 and second crushing roller 6, the effect broken to the construction waste has been played, through setting up second motor 9 and conveying roller 10, the effect with broken construction waste discharge broken case 1 after the breakage has been played, it singly leans on the manual work to operate to have solved, both waste time and energy, and work efficiency is lower relatively, can not be quick pulverize the construction waste, influence the problem of the construction progress of engineering.
During the use, start first motor 2, first motor 2's output shaft drives initiative belt pulley 3 clockwise rotation, initiative belt pulley 3 drives driven belt pulley 7 clockwise rotation through the transmission of belt 8, drive bull stick 5 clockwise rotation when driven belt pulley 7 is rotatory, bull stick 5 drives second crushing roller 6 clockwise rotation, because second crushing roller 6 and first crushing roller 4 meshing, so second crushing roller 6 anticlockwise rotation, put into massive construction waste from inlet pipe 11, first crushing roller 4 is broken to it with the cooperation of second crushing roller 6, then start second motor 9, the output shaft of second motor 9 drives conveying roller 10 rotatory, the construction waste after will breaking passes through discharging pipe 12 and discharges when conveying roller 10 is rotatory.
In summary, the following steps: this high-efficient broken processing apparatus of construction waste material through broken case 1, first motor 2, initiative belt pulley 3, first crushing roller 4, bull stick 5, the cooperation of second crushing roller 6, driven belt pulley 7, belt 8, second motor 9 and conveying roller 10, has solved and has singly leaned on the manual work to operate, both wastes time and energy, and work efficiency is lower, can not be quick pulverize construction waste material, influences the problem of the construction progress of engineering.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a high-efficient broken processing apparatus of construction waste, includes broken case (1), its characterized in that: the top on the right side of the crushing box (1) is fixedly provided with a first motor (2), an output shaft sleeve of the first motor (2) is provided with a driving belt disc (3), the front end and the rear end of an inner cavity of the crushing box (1) are both movably connected with a first crushing roller (4) through bearings, the back of the crushing box (1) is provided with a rotating rod (5) in a penetrating manner, the rotating rod (5) extends to the inner cavity of the crushing box (1) and is fixedly connected with a second crushing roller (6), one side, away from the rotating rod (5), of the second crushing roller (6) is movably connected with the inner wall of the crushing box (1) through a rotating shaft, the second crushing roller (6) is meshed with the first crushing roller (4), one end, located outside the crushing box (1), of the rotating rod (5) is provided with a driven belt disc (7), and the driven belt disc (7) is in transmission connection with the driving belt disc (3) through a belt (8), the crushing box is characterized in that a second motor (9) is fixedly mounted at the left bottom of the crushing box (1), conveying rollers (10) are fixedly connected to output shafts of the second motor (9), and one ends, far away from the output shafts of the second motor (9), of the conveying rollers (10) penetrate through the crushing box (1) and extend to an inner cavity of the crushing box (1).
2. The efficient construction waste crushing and processing device as claimed in claim 1, wherein: the center department intercommunication at broken case (1) top has inlet pipe (11), the bottom intercommunication on broken case (1) right side has discharging pipe (12).
3. The efficient construction waste crushing and processing device as claimed in claim 1, wherein: the bottom fixedly connected with mount pad (13) of first motor (2), the left side of mount pad (13) and the right side fixed connection of broken case (1).
4. The efficient construction waste crushing and processing device as claimed in claim 1, wherein: the equal fixedly connected with guide plate (14) in both sides of broken case (1) inner wall, one side fixedly connected with bracing piece (15) of broken case (1) inner wall are kept away from in guide plate (14), the inner wall fixed connection of one side and broken case (1) of guide plate (14) is kept away from in bracing piece (15).
5. The efficient construction waste crushing and processing device as claimed in claim 1, wherein: the equal fixedly connected with sleeve pipe (16) in both sides of broken case (1) bottom, the top fixedly connected with spring (17) of sleeve pipe (16) inner chamber, one side fixedly connected with landing leg (18) at sleeve pipe (16) inner chamber top are kept away from in spring (17), there is walking wheel (19) bottom of landing leg (18) through loose axle swing joint.
6. The efficient construction waste crushing and processing device as claimed in claim 5, wherein: both sides of the inner wall of the sleeve (16) are provided with sliding grooves (20), the inner cavity of each sliding groove (20) is connected with a sliding block (21) in a sliding mode, and one side, far away from the inner cavity of each sliding groove (20), of each sliding block (21) is fixedly connected with the supporting leg (18).
7. The efficient construction waste crushing and processing device as claimed in claim 5, wherein: the left bottom fixedly connected with push rod (22) of crushing case (1) inner chamber, the pot head that keeps away from crushing case (1) in push rod (22) is equipped with anti-skidding cover.
CN201811226967.6A 2018-10-22 2018-10-22 High-efficient broken processing apparatus of construction waste Pending CN111069223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811226967.6A CN111069223A (en) 2018-10-22 2018-10-22 High-efficient broken processing apparatus of construction waste

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811226967.6A CN111069223A (en) 2018-10-22 2018-10-22 High-efficient broken processing apparatus of construction waste

Publications (1)

Publication Number Publication Date
CN111069223A true CN111069223A (en) 2020-04-28

Family

ID=70309631

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811226967.6A Pending CN111069223A (en) 2018-10-22 2018-10-22 High-efficient broken processing apparatus of construction waste

Country Status (1)

Country Link
CN (1) CN111069223A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112871297A (en) * 2021-01-29 2021-06-01 吉林市安欣商品混凝土有限责任公司 Concrete crusher
CN113908909A (en) * 2021-09-28 2022-01-11 陕西航天通宇建筑工程有限公司 Construction waste treatment device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112871297A (en) * 2021-01-29 2021-06-01 吉林市安欣商品混凝土有限责任公司 Concrete crusher
CN113908909A (en) * 2021-09-28 2022-01-11 陕西航天通宇建筑工程有限公司 Construction waste treatment device
CN113908909B (en) * 2021-09-28 2023-01-06 陕西航天通宇建筑工程有限公司 Construction waste treatment device

Similar Documents

Publication Publication Date Title
CN105728091B (en) The jaw crusher of built-in driving
CN108160289B (en) High-efficient breaker of building rubbish
CN201728135U (en) Counterattack ring hammer type crusher
CN111069223A (en) High-efficient broken processing apparatus of construction waste
CN208944198U (en) A kind of blocky waste crushing system of strong concrete
CN217164788U (en) Garbage crushing device for construction industry
CN110052305B (en) Crusher capable of efficiently crushing and easily blanking
CN204768873U (en) Dual breaker of building rubbish
CN207507623U (en) A kind of Chinese medicine processing efficient pulverizing device
CN104646151A (en) Vertical shaft type impact crusher
CN201227842Y (en) Antiskid Concrete mixer
CN210787476U (en) Toothed roll type sand making machine
CN211026568U (en) High-efficient reducing mechanism of regeneration aggregate
CN206008943U (en) The disintegrating machine that a kind of mine uses
CN214390343U (en) Hydraulic composite roller type crusher
CN210585091U (en) Fine ore crushing equipment
CN213590590U (en) Construction waste treatment device convenient to use
CN213320616U (en) Pushing device for cutting of anticorrosion wood
CN207222018U (en) A kind of construction waste crushing device
CN203040665U (en) Waste cigarette loosening device
CN207641606U (en) Fiberboard double crushing device
CN209968553U (en) Iron fillings remove device for ball mill
CN220091602U (en) Pulverizer for industrial garbage disposal
CN221334431U (en) Nonmetallic material waste treatment device
CN221471230U (en) Dust removal lifting machine for cement processing

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20200428

WD01 Invention patent application deemed withdrawn after publication