CN210705531U - Waste tire recycling dustproof device - Google Patents

Waste tire recycling dustproof device Download PDF

Info

Publication number
CN210705531U
CN210705531U CN201921446531.8U CN201921446531U CN210705531U CN 210705531 U CN210705531 U CN 210705531U CN 201921446531 U CN201921446531 U CN 201921446531U CN 210705531 U CN210705531 U CN 210705531U
Authority
CN
China
Prior art keywords
crushing
air outlet
heating
assembly
cavity
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.)
Expired - Fee Related
Application number
CN201921446531.8U
Other languages
Chinese (zh)
Inventor
周斌
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.)
Yunnan Tianyuan Environmental Protection Technology Co Ltd
Original Assignee
Yunnan Tianyuan Environmental Protection 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 Yunnan Tianyuan Environmental Protection Technology Co Ltd filed Critical Yunnan Tianyuan Environmental Protection Technology Co Ltd
Priority to CN201921446531.8U priority Critical patent/CN210705531U/en
Application granted granted Critical
Publication of CN210705531U publication Critical patent/CN210705531U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/52Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • 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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/62Plastics recycling; Rubber recycling

Landscapes

  • Processing Of Solid Wastes (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

The utility model relates to the field of waste tire treatment equipment, in particular to a waste tire recovery dustproof device, which comprises a device body; the device body is internally divided into a heating cavity and a crushing cavity, the heating cavity is communicated with the crushing cavity, a sealing cover is arranged at the upper end of the heating cavity, an air outlet port is formed in the top end of the sealing cover, the air outlet port is communicated with a tail gas treatment assembly through a main air outlet pipe, and a heating assembly is arranged in the heating cavity; a crushing assembly is arranged in the crushing cavity, and the lower end of the crushing assembly is connected with a driving assembly; the waste tire recycling dustproof device has the following advantages: the waste tire is heated by the heating assembly and then crushed by the crushing assembly, so that the crushing effect of the waste tire is greatly improved; and the tail gas treatment assembly can absorb and treat toxic gas and dust generated when the waste tire is heated, so that the environment-friendly effect of the waste tire recycling dust prevention device during operation is improved.

Description

Waste tire recycling dustproof device
Technical Field
The utility model relates to a junked tire treatment facility field specifically is a junked tire retrieves dust keeper.
Background
Junked tires produced annually in china are increasing at a rate of 8% to 10%. In 2010, the production amount of waste tires in China reaches about 2.5 hundred million, the recovery rate is only about 50 percent and is less than 50 percent of that of developed countries in the west, and huge resource waste is caused, so that the recovery and reutilization of the waste tires need to be emphasized.
In the prior art, the waste tires are generally treated by a crushing process; the existing waste tire crushing process is generally carried out at normal temperature, and the waste tire is a rubber product and has large shaping, so that the waste tire is not easy to crush; in addition, a large amount of dust is also generated during the process of crushing the waste tires.
To the problem in the above-mentioned background art, the utility model aims at providing a dust keeper is retrieved to junked tire.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dust keeper is retrieved to junked tire to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a junked tire recycling dustproof device comprises: the device comprises a device body, wherein the interior of the device body is divided into a heating cavity and a crushing cavity, the heating cavity is communicated with the crushing cavity, a sealing cover is arranged at the upper end of the heating cavity, an air outlet port is formed in the top end of the sealing cover, and the air outlet port is communicated with a tail gas treatment assembly through a main air outlet pipe; a heating assembly is arranged in the heating cavity; a crushing assembly is arranged in the crushing cavity, the lower end of the crushing assembly is connected with a driving assembly, and the driving assembly is fixedly arranged in the middle of the lower end of the device body through a fixing frame; the left side and the right side of the lower end of the inner part of the crushing cavity are communicated with a discharging channel, and a discharging valve is installed on the discharging channel.
As a further aspect of the present invention: the device body lower extreme left and right sides is equipped with the landing leg, and the slipmat is installed to the landing leg lower extreme.
As a further aspect of the present invention: the heating assembly comprises a heating rod and a prick, the prick is arranged on one side of the heating rod, the heating rod is a resistance wire heating rod, one end of the heating rod is connected with a power supply and is installed on the inner wall of the heating cavity, and a heat insulation material layer is filled between the inner wall of the heating cavity and the inner wall of the device body.
As a further aspect of the present invention: crushing unit includes pivot, auger delivery crushing blade, crushing pole and tip, install the tip on the end portion that the pivot upper end stretched into heating intracavity portion, the pivot is from last down being equipped with auger delivery crushing blade and crushing pole in proper order, is equipped with crushing blade on the crushing pole, and the pivot bottom is connected drive assembly after passing the device body.
As a further aspect of the present invention: the driving assembly comprises a motor and a bearing, a driving shaft of the motor is connected with the bearing, and a rotating shaft is arranged at the upper end of the bearing.
As a further aspect of the present invention: the tail gas treatment component comprises an air pump and a tail gas treatment tank, the air pump is communicated with the upper end of the tail gas treatment tank through an air pipe, the lower end of the tail gas treatment tank is discharged through an air pipe, and a second air outlet valve is installed on the air pipe communicated with the lower end of the tail gas treatment tank.
As a further aspect of the present invention: the tail gas treatment tank is characterized in that joints are arranged at two ends of the upper end of the tail gas treatment tank and used for connecting a gas pipe, absorption layers are arranged inside the joints, the number of the absorption layers is four, and the four absorption layers are linearly distributed in the tail gas treatment tank from top to bottom.
As a further aspect of the present invention: the absorption layer is internally provided with absorption material columns which are arranged in the absorption layer in an up-down gradient manner, the absorption material columns are made of alkaline material layers, and a circulation gap is formed between the upper absorption material column and the lower absorption material column; and the two ends of the upper end of the absorption layer are respectively provided with an air inlet and an air outlet.
As a further aspect of the present invention: the air outlet port is communicated with the air pump through a main air outlet pipe, the main air outlet pipe is communicated with an exhaust pipe, a first air outlet valve is installed on the exhaust pipe, one end of the exhaust pipe is communicated with the main air outlet pipe, and the other end of the exhaust pipe is communicated with the interior of the crushing cavity.
Compared with the prior art, the beneficial effects of the utility model are that:
the waste tire recycling dustproof device has the following advantages:
the waste tire is heated by the heating assembly and then crushed by the crushing assembly, so that the crushing effect of the waste tire is greatly improved;
the crushing assembly has a good crushing effect, and a channel connecting the heating cavity and the crushing cavity can be kept smooth and is not easily blocked by waste tires;
and the tail gas treatment assembly can absorb and treat toxic gas and dust generated when the waste tires are heated, so that the environment-friendly effect of the waste tire recycling dust prevention device during operation is improved.
Drawings
In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.
Fig. 1 is a schematic structural view of a junked tire recycling dust-proof device according to an embodiment of the present invention.
Fig. 2 is a structural schematic diagram of a tail gas treatment tank of a junked tire recycling dust-proof device in an embodiment of the present invention.
In the figure: 1-device body, 2-heat preservation material layer, 3-heating rod, 4-prick, 5-heating cavity, 6-air outlet port, 7-main air outlet pipe, 8-branch air pipe, 9-first air outlet valve, 10-air pump, 11-tail gas treatment tank, 12-second air outlet valve, 13-supporting leg, 14-non-slip mat, 15-fixing frame, 16-motor, 17-bearing, 18-discharging channel, 19-discharging valve, 20-crushing cavity, 21-crushing rod, 22-crushing blade, 23-rotating shaft, 24-spiral conveying crushing blade, 25-tip, 26-connector, 27-absorbing layer, 28-air inlet, 29-absorbing material column and 30-air outlet.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to fig. 1, in embodiment 1 of the present invention, a device for recycling waste tires and preventing dust includes: the device comprises a device body 1, wherein the interior of the device body 1 is divided into a heating cavity 5 and a crushing cavity 20, the heating cavity 5 is communicated with the crushing cavity 20, a sealing cover is arranged at the upper end of the heating cavity 5, an air outlet port 6 is formed in the top end of the sealing cover, and the air outlet port 6 is communicated with a tail gas treatment assembly through a main air outlet pipe 7; a heating assembly is arranged in the heating cavity 5; a crushing assembly is arranged in the crushing cavity 20, the lower end of the crushing assembly is connected with a driving assembly, and the driving assembly is fixedly arranged in the middle of the lower end of the device body 1 through a fixing frame 15; the left side and the right side of the lower end in the crushing cavity 20 are communicated with a discharging channel 18, and a discharging valve 19 is arranged on the discharging channel 18;
after the sealing cover is opened, the waste tire to be treated is thrown into the heating cavity 5, and the heating assembly heats the waste tire in the heating cavity 5, so that the waste tire is easy to crush; sulfur-containing tail gas and dust generated after heating the waste tires are conveyed to a tail gas treatment component through a main gas outlet pipe 7 to be treated; after the junked tire is heated to a certain temperature, the driving assembly is started, the running driving assembly drives the crushing assembly in the crushing cavity 20 to crush the heated junked tire, and the crushed tire waste is discharged through the discharge channel 18.
Furthermore, the left side and the right side of the lower end of the device body 1 are provided with the supporting legs 13, the lower ends of the supporting legs 13 are provided with the anti-slip pads 14, and the anti-slip pads 14 improve the stability of the waste tire recycling dust prevention device during placement.
Further, the heating assembly comprises a heating rod 3 and a pricker 4, the pricker 4 is arranged on one side of the heating rod 3, the heating rod 3 is a resistance wire heating rod, one end of the heating rod 3 is connected with a power supply and is arranged on the inner wall of the heating cavity 5, and a heat insulation material layer 2 is filled between the inner wall of the heating cavity 5 and the inner wall of the device body 1;
the heating rod 3 is powered on, the heating rod 3 generates heat to heat the interior of the heating cavity 5, the waste tires placed in the heating cavity 5 are further heated, and the heated waste tires downwards move along the pricks 4 and enter the crushing cavity 20 to be crushed; while the temperature inside the heating chamber 5 is raised, the thermal insulation material layer 2 improves the thermal insulation effect inside the heating chamber 5.
Further, the crushing assembly comprises a rotating shaft 23, a spiral conveying crushing blade 24, a crushing rod 21 and a tip 25, the tip 25 is installed on the end part of the upper end of the rotating shaft 23 extending into the heating cavity 5, the spiral conveying crushing blade 24 and the crushing rod 21 are sequentially arranged on the rotating shaft 23 from top to bottom, the crushing blade 22 is arranged on the crushing rod 21, and the bottom end of the rotating shaft 23 is connected with the driving assembly after penetrating through the device body 1;
by starting the driving assembly, the rotating shaft 23 drives the spiral conveying crushing blade 24 and the crushing rod 21 to rotate simultaneously, and the rotary spiral conveying crushing blade 24 can preliminarily crush the heated waste tires and can also convey the waste tires downwards into the crushing cavity 20 without blocking a connecting channel between the heating cavity 5 and the crushing cavity 20; the rotating crushing rod 21 drives the crushing blade 22 to rotate, and then secondary crushing operation is performed on the waste tire.
Further, the driving assembly comprises a motor 16 and a bearing 17, a driving shaft of the motor 16 is connected with the bearing 17, and a rotating shaft 23 is arranged at the upper end of the bearing 17;
and starting the motor 16, wherein the motor 16 drives the rotating shaft 23 to rotate at a high speed through the bearing 17, and further drives the crushing assembly to rotate to crush the waste tires.
Example 2
Further, the tail gas treatment assembly comprises an air pump 10 and a tail gas treatment tank 11, the air pump 10 is communicated with the upper end of the tail gas treatment tank 11 through an air pipe, the lower end of the tail gas treatment tank 11 is discharged through the air pipe, and a second air outlet valve 12 is mounted on the communicated air pipe at the lower end of the tail gas treatment tank 11;
sulfur-containing gas and dust generated in the heating cavity 5 are sucked out by an operating air pump 10 and conveyed into a tail gas treatment tank 11 for treatment, and are discharged through an air pipe communicated with the lower end of the tail gas treatment tank 11 after being treated in the tail gas treatment tank 11;
referring to fig. 2, further, two ends of the upper end of the tail gas treatment tank 11 are provided with connectors 26, the connectors 26 are used for connecting a gas pipe, the connectors 26 are provided with absorption layers 27 inside, the number of the absorption layers 27 is four, and the four absorption layers 27 are linearly distributed up and down inside the tail gas treatment tank 11;
the absorption layer 27 is internally provided with absorption material columns 29, the absorption material columns 29 are arranged in the absorption layer 27 in an up-down gradient manner, the absorption material columns 29 are made of alkaline material layers, and a circulation gap is formed between the upper absorption material column 29 and the lower absorption material column 29; the two ends of the upper end of the absorption layer 27 are respectively provided with an air inlet 28 and an air outlet 30;
the sulfur-containing gas and the dust are conveyed to the interior of the tail gas treatment tank 11 through the cooperation of the air pump 10 and the air pipe, and in the interior of the tail gas treatment tank 11, the sulfur-containing gas and the dust enter the interior of the absorption layer 27 from the air inlet 28 and are discharged from the air outlet 30 after being acted by the absorption material columns 29 which are distributed in an up-and-down overlapping manner in the interior of the absorption layer 27; this is repeated to remove the sulfur-containing gas and the acidic substances in the dust through the four absorption layers 27.
Further, the air outlet port 6 is communicated with an air pump 10 through a main air outlet pipe 7, an outgoing air pipe 8 is communicated on the main air outlet pipe 7, a first air outlet valve 9 is installed on the outgoing air pipe 8, one end of the outgoing air pipe 8 is communicated with the main air outlet pipe 7, and the other end of the outgoing air pipe 8 is communicated with the inside of the crushing cavity 20; when crushing subassembly stop work, through opening first air outlet valve 9, make expenditure trachea 8 inhale and smash the inside sulphur gas and the dust of 20 insides of chamber and carry to the inside processing of tail gas treatment jar 11 through air pump 10, further improve dust keeper's dustproof and desulfurization effect are retrieved to junked tire.
The embodiment of the utility model provides a theory of operation is:
after the sealing cover is opened, the waste tire to be treated is thrown into the heating cavity 5, and the heating assembly heats the waste tire in the heating cavity 5, so that the waste tire is easy to crush; sulfur-containing tail gas and dust generated after heating the waste tires are conveyed to a tail gas treatment component through a main gas outlet pipe 7 to be treated; after the junked tire is heated to a certain temperature, the driving assembly is started, the running driving assembly drives the crushing assembly in the crushing cavity 20 to crush the heated junked tire, and the crushed tire waste is discharged through the discharge channel 18.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. A junked tire recycling dustproof device comprises: the device comprises a device body (1), wherein the interior of the device body (1) is divided into a heating cavity (5) and a crushing cavity (20), and the heating cavity (5) is communicated with the crushing cavity (20); the method is characterized in that:
a sealing cover is arranged at the upper end of the heating cavity (5), an air outlet port (6) is formed in the top end of the sealing cover, the air outlet port (6) is communicated with a tail gas treatment assembly through a main air outlet pipe (7), and a heating assembly is arranged in the heating cavity (5);
a crushing assembly is arranged in the crushing cavity (20), the lower end of the crushing assembly is connected with a driving assembly, and the driving assembly is fixedly arranged in the middle of the lower end of the device body (1) through a fixing frame (15); the left side and the right side of the lower end in the crushing cavity (20) are communicated with the discharging channel (18), and the discharging valve (19) is installed on the discharging channel (18).
2. The junked tire recycling dustproof device according to claim 1, characterized in that: the device is characterized in that supporting legs (13) are arranged on the left side and the right side of the lower end of the device body (1), and anti-skid pads (14) are installed at the lower ends of the supporting legs (13).
3. The junked tire recycling dustproof device according to claim 1, characterized in that: the heating assembly comprises a heating rod (3) and a prick (4), the prick (4) is arranged on one side of the heating rod (3), the heating rod (3) is a resistance wire heating rod, one end of the heating rod (3) is connected with a power supply and is arranged on the inner wall of a heating cavity (5), and a heat insulation material layer (2) is filled between the inner wall of the heating cavity (5) and the inner wall of the device body (1).
4. The junked tire recycling dustproof device according to claim 1, characterized in that: crushing unit includes pivot (23), auger delivery crushing blade (24), crushing pole (21) and tip (25), install tip (25) on the end portion that pivot (23) upper end stretched into heating chamber (5) inside, pivot (23) are from last down being equipped with auger delivery crushing blade (24) and crushing pole (21) in proper order, are equipped with crushing blade (22) on crushing pole (21), and connect drive assembly behind device body (1) is passed to pivot (23) bottom.
5. The junked tire recycling dustproof device according to claim 4, characterized in that: the driving assembly comprises a motor (16) and a bearing (17), a driving shaft of the motor (16) is connected with the bearing (17), and a rotating shaft (23) is arranged at the upper end of the bearing (17).
6. The junked tire recycling dustproof device according to claim 1, characterized in that: the tail gas treatment subassembly includes air pump (10) and tail gas treatment jar (11), air pump (10) are through trachea switch-on tail gas treatment jar (11) upper end, and tail gas treatment jar (11) lower extreme passes through the trachea and discharges, installs second air outlet valve (12) on the trachea of switch-on of tail gas treatment jar (11) lower extreme.
7. The junked tire recycling dustproof device according to claim 6, characterized in that: tail gas treatment jar (11) upper end both ends are equipped with joint (26), connect (26) and put through the trachea, connect (26) inside and be equipped with absorbed layer (27), the quantity of absorbed layer (27) is four, and four absorbed layers (27) are linear distribution about tail gas treatment jar (11) is inside.
8. The junked tire recycling dustproof device according to claim 7, characterized in that: the absorption layer (27) is internally provided with absorption material columns (29), the absorption material columns (29) are arranged in the absorption layer (27) in an up-down gradient manner, the absorption material columns (29) are made of alkaline material layers, and circulation gaps are formed between the absorption material columns (29) arranged up and down; and both ends of the upper end of the absorption layer (27) are respectively provided with an air inlet (28) and an air outlet (30).
9. The junked tire recycling dustproof device according to claim 1, characterized in that: the air outlet port (6) is communicated with an air pump (10) through a main air outlet pipe (7), an exhaust pipe (8) is communicated with the main air outlet pipe (7), a first air outlet valve (9) is installed on the exhaust pipe (8), one end of the exhaust pipe (8) is communicated with the main air outlet pipe (7), and the other end of the exhaust pipe (8) is communicated with the interior of the crushing cavity (20).
CN201921446531.8U 2019-09-02 2019-09-02 Waste tire recycling dustproof device Expired - Fee Related CN210705531U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921446531.8U CN210705531U (en) 2019-09-02 2019-09-02 Waste tire recycling dustproof device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921446531.8U CN210705531U (en) 2019-09-02 2019-09-02 Waste tire recycling dustproof device

Publications (1)

Publication Number Publication Date
CN210705531U true CN210705531U (en) 2020-06-09

Family

ID=70926326

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921446531.8U Expired - Fee Related CN210705531U (en) 2019-09-02 2019-09-02 Waste tire recycling dustproof device

Country Status (1)

Country Link
CN (1) CN210705531U (en)

Similar Documents

Publication Publication Date Title
CN103505950B (en) Dust collecting device for UV coating dust
CN104607455B (en) A kind of organic polluted soil Multi-stage heat desorption repair system
CN109256598B (en) Safe and automatic disassembling device for controllable discharge of waste hard-shell lithium ion power battery
CN109346790B (en) Safe and automatic disassembling method for waste hard-shell lithium ion power battery through controllable discharge
CN210705531U (en) Waste tire recycling dustproof device
CN205912792U (en) Efficient microwave tea wrap machine
CN209085207U (en) A kind of dedicated drying device of leech peptide plain piece
CN205214041U (en) A high -efficient drying device for beef processing
CN109499557B (en) Energy-saving environment-friendly active carbon regeneration furnace
CN216527212U (en) Transparent film wrapping thermal shrinkage device for chip label
CN105091538B (en) A kind of soft capsule automatic drier
CN211389718U (en) Shredder with dust removal performance
CN113175805A (en) Food is burdock for relevant processing cuts off drying device
CN211977455U (en) Drying auxiliary assembly for herbal pieces-for
CN112725090A (en) Extraction device and extraction method of volatile plant essential oil
CN111854391A (en) Tail gas treatment device for drying mechanical parts
CN218554093U (en) Phosphorous acid production deacidification cauldron
CN212195983U (en) Glucosamine sodium sulfate equipment for packing
CN112577264A (en) Drying equipment is used in chinese-medicinal material processing
CN110421625A (en) A kind of efficient cutter for packing boxboard
CN217014731U (en) Electromagnetic herbal medicine roaster with dust removal effect
CN108380334A (en) A kind of medicinal plastic bottle packing disintegrating apparatus
CN210438671U (en) Reclaimed rubber desulphurization unit
CN220224086U (en) Fuel oil reaction device
CN204841194U (en) Modified sheath after cure recycled water device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200609