CN218521232U - Incessant generating device of microbial inoculum - Google Patents

Incessant generating device of microbial inoculum Download PDF

Info

Publication number
CN218521232U
CN218521232U CN202222596405.9U CN202222596405U CN218521232U CN 218521232 U CN218521232 U CN 218521232U CN 202222596405 U CN202222596405 U CN 202222596405U CN 218521232 U CN218521232 U CN 218521232U
Authority
CN
China
Prior art keywords
mixing
mixing drum
stirring
threaded rod
mixing 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.)
Active
Application number
CN202222596405.9U
Other languages
Chinese (zh)
Inventor
王殿波
饶旭
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.)
Xi'an Dongwang Meige Biotechnology Co ltd
Original Assignee
Xi'an Dongwang Meige Biotechnology 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 Xi'an Dongwang Meige Biotechnology Co ltd filed Critical Xi'an Dongwang Meige Biotechnology Co ltd
Priority to CN202222596405.9U priority Critical patent/CN218521232U/en
Application granted granted Critical
Publication of CN218521232U publication Critical patent/CN218521232U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Apparatus Associated With Microorganisms And Enzymes (AREA)

Abstract

The utility model discloses a incessant generating device of microbial inoculum relates to microbial inoculum production and processing technical field. The utility model comprises a bottom plate, a mixing drum is fixedly connected with the top of the bottom plate, a threaded rod is connected in the mixing drum along the axial rotation, one end of the threaded rod runs through the mixing drum and is connected with a driving mechanism arranged outside the mixing drum, a sealing disc is matched in the mixing drum in a sliding way, and the sealing disc is matched with the threaded rod in a threaded way; the two ends in the mixing cylinder are rotatably connected with stirring shafts, stirring blades are uniformly fixed on the outer circular surface of each stirring shaft, the top end of each stirring shaft penetrates through the outer side of the mixing cylinder, and a linkage mechanism for driving the two stirring shafts to rotate is arranged at the top of the mixing cylinder. The utility model discloses a sealed disc separates the mixing drum for two mixing spaces, adjusts the liquid level change in two mixing spaces to under the cooperation of level gauge, controller and solenoid valve, realized the continuous production of microbial inoculum, improved work efficiency.

Description

Uninterrupted generation device for microbial agent
Technical Field
The utility model belongs to the technical field of microbial inoculant production and processing, especially, relate to an incessant generating device of microbial inoculant.
Background
The microbial fertilizer is a product which leads crops to obtain specific fertilizer effects due to the life activities of microorganisms, and is a fertilizer used in agricultural production. And the raw materials need to be uniformly stirred by stirring equipment in the preparation process of the microbial bacteria.
For example, the existing chinese patent publication No. CN217164056U discloses a rhizobium microbial inoculum production device, which includes a stirring tank and a stirring mechanism, wherein a reaction cavity is formed in the stirring tank, the stirring mechanism includes a stirring blade, an arc blade and a driving component, the stirring blade is rotatably connected to the stirring tank, the arc blade is disposed on the stirring blade, the arc blade stirs the microbial inoculum near the bottom wall of the reaction cavity, the driving component is disposed on the stirring tank, and the driving component is connected to the stirring blade and drives the stirring blade to rotate. This application is through the arc leaf that sets up, also stirs the microbial inoculum of reaction chamber diapire department, and then makes the fermentation reproductive effect of microbial inoculum obtain improving, and then makes the production work efficiency of microbial inoculum obtain improving. However, this proposal is difficult to perform continuous production when in use, and requires that the next mixing operation be performed after the raw materials in the equipment are poured out, which results in low working efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an incessant generating device of microbial inoculum separates the mixing drum for two mixing spaces through sealed disc, utilizes actuating mechanism to drive the threaded rod and rotates, drives sealed disc and carries out reciprocating motion in the inlet pipe both sides, adjusts the liquid level change in two mixing spaces to under the cooperation of level gauge, controller and solenoid valve, solved current being difficult to carry out continuous production, work efficiency is lower.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model relates to a microbial agent uninterrupted generating device, which comprises a bottom plate, the bottom plate top is fixedly connected with a mixing drum, the center of the excircle surface of the mixing drum is communicated with a feed pipe, one side of the mixing drum is provided with a pretreatment mechanism, the pretreatment mechanism is fixed at the top of the bottom plate and the output end is communicated with the feed pipe, a threaded rod is rotationally connected in the mixing drum along the axial direction, one end of the threaded rod runs through the mixing drum and is connected with a driving mechanism arranged outside the mixing drum, a sealing disc is in sliding fit in the mixing drum, and the sealing disc is in threaded fit with the threaded rod; stirring shafts are rotatably connected at two ends in the mixing cylinder, stirring blades are uniformly fixed on the outer circumferential surface of each stirring shaft, the top end of each stirring shaft penetrates to the outer side of the mixing cylinder, and a linkage mechanism for driving the two stirring shafts to rotate is arranged at the top of the mixing cylinder; the controller is installed to mixing drum one end, the equal fixed mounting in the inside both ends of mixing drum has the level gauge, mixing drum bottom both ends department all is fixed the intercommunication has row material pipe, it is equipped with the solenoid valve to arrange the material on the pipe, solenoid valve, level gauge all with controller electric connection.
As an optimal technical scheme of the utility model, open the mixing drum inner wall has the sliding channel way, the threaded rod rotates to be connected in the sliding channel way, the outer disc fixedly connected with of sealed disc and sliding channel way sliding fit's slider, slider and threaded rod threaded connection.
As a preferred technical scheme of the utility model, actuating mechanism includes the pivot, pivot one end run through the mixing drum and with threaded rod fixed connection, the pivot is rotated with the mixing drum and is connected, pivot other end fixedly connected with first bevel gear, the meshing has second bevel gear in the first bevel gear outside, second bevel gear one end fixedly connected with connecting axle, connecting axle one end is rotated and is connected with the fixed block, fixed block and mixing drum fixed connection, install the first motor of drive connecting axle pivoted on the fixed block.
As a preferred technical scheme of the utility model, link gear includes the casing, casing and mixing drum fixed connection, the symmetry is equipped with two driven sprocket in the casing, (mixing) shaft one end extend to in the casing respectively and with adjacent driven sprocket fixed connection, two the driving chain both ends are located to driven sprocket cover respectively, driving chain center department cover is equipped with drive sprocket, casing top fixedly connected with second motor, second motor output extend to in the casing and with drive sprocket fixed connection.
As the utility model discloses a preferred technical scheme, preliminary treatment mechanism is including preliminary treatment case and inside stirring subassembly that is equipped with, the transport auger is located to preliminary treatment case one side, carry auger and preliminary treatment case intercommunication, and top one side and inlet pipe intercommunication.
The utility model discloses following beneficial effect has:
1. the utility model discloses a sealed disc separates into two adjustable size mixing spaces with the mixing drum, utilizes actuating mechanism to drive the threaded rod and rotates for sealed disc carries out reciprocating motion in the inlet pipe both sides, adjusts two mixing space's liquid level change, and makes two discharging pipes ejection of compact in turn under the cooperation of level gauge, controller and solenoid valve, thereby has realized the continuous production of microbial inoculum, has improved work efficiency.
2. The utility model discloses an add the raw materials of production microbial inoculum to the preliminary treatment incasement and carry out the preliminary mixing processing, carry to the mixing drum in through carrying the auger after that, further stir the raw materials in the transportation process to the stirring efficiency and the stirring degree of consistency of microbial inoculum raw materials have been improved.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the uninterrupted microbial agent generating device of the present invention.
Fig. 2 is a schematic view of fig. 1 from another view angle.
Fig. 3 is a schematic view of the interior of the mixing drum of fig. 1.
Fig. 4 is a schematic structural view of the inside of the housing of fig. 1.
Fig. 5 is a partial cross-sectional view of the pretreatment mechanism of fig. 1.
In the drawings, the components represented by the respective reference numerals are listed below:
1-bottom plate, 101-feeding pipe, 2-mixing cylinder, 201-sliding groove channel, 3-pretreatment mechanism, 4-threaded rod, 5-driving mechanism, 6-sealing disc, 7-stirring shaft, 8-linkage mechanism, 9-controller, 10-liquid level meter, 11-discharging pipe, 12-electromagnetic valve, 13-sliding block, 14-rotating shaft, 15-first bevel gear, 16-second bevel gear, 17-connecting shaft, 18-fixing block, 19-first motor, 20-shell, 21-driven sprocket, 22-driving chain, 23-driving sprocket, 24-second motor, 25-pretreatment box and 26-conveying auger.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The specific embodiment is as follows:
referring to fig. 1-5, the utility model relates to a microorganism bacterium agent uninterrupted generating device, comprising a bottom plate 1, a mixing cylinder 2 is fixedly connected with the top of the bottom plate 1, a feeding pipe 101 is communicated with the center of the outer circular surface of the mixing cylinder 2, the feeding pipe 101 is arranged in an inclined manner, a preprocessing mechanism 3 is arranged on one side of the mixing cylinder 2, the preprocessing mechanism 3 is fixed on the top of the bottom plate 1, the output end of the preprocessing mechanism is communicated with the feeding pipe 101, the raw materials of the microorganism bacterium agent are added into the preprocessing mechanism 3 to be premixed and conveyed into the mixing cylinder 2, a threaded rod 4 is rotatably connected in the mixing cylinder 2 along the axial direction, one end of the threaded rod 4 penetrates through the mixing cylinder 2 and is connected with a driving mechanism 5 arranged outside the mixing cylinder 2, a sealing disc 6 is in the mixing cylinder 2 in a sliding fit manner, the outer circular surface of the sealing disc 6 is attached to the inner circular surface of the mixing cylinder 2, and the sealing disc 6 is in a threaded fit with the threaded rod 4; stirring shafts 7 are rotatably connected at two ends in the mixing cylinder 2, stirring blades are uniformly fixed on the outer circular surface of each stirring shaft 7, the top ends of the stirring shafts 7 penetrate to the outer side of the mixing cylinder 2, and a linkage mechanism 8 for driving the two stirring shafts 7 to rotate is arranged at the top of the mixing cylinder 2; a controller 9 is installed at one end of the mixing cylinder 1, liquid level meters 10 are fixedly installed at two ends inside the mixing cylinder 2, a discharging pipe 11 is fixedly communicated at two ends of the bottom of the mixing cylinder 2, an electromagnetic valve 12 is arranged on the discharging pipe 11, the electromagnetic valve 12 and the liquid level meters 10 are electrically connected with the controller 9, the liquid level meters 10 are used as signal inputs to transmit liquid level signals into the controller 9, and then the controller 9 controls the corresponding electromagnetic valves 12 to be switched on and off to realize the switching on and off of the discharging pipe 11; the sealing disc 6 divides the interior of the mixing barrel 2 into two relatively independent mixing spaces, the driving mechanism 5 is utilized to drive the threaded rod 4 to rotate, so that the sealing disc 6 can move back and forth on two sides of the feeding pipe 101, the liquid level change of the two mixing spaces is adjusted, and the two discharging pipes 11 can alternately discharge materials under the matching of the liquid level meter 10, the controller 9 and the electromagnetic valve 12.
As shown in fig. 3, a sliding channel 201 is formed on the inner wall of the mixing cylinder 2, the threaded rod 4 is rotatably connected in the sliding channel 201, the outer circular surface of the sealing disc 6 is fixedly connected with the sliding block 13 which is in sliding fit with the sliding channel 201, the sliding block 13 is in threaded connection with the threaded rod 4, and by arranging the threaded rod 4 in the sliding channel 201, the threaded rod 4 is prevented from occupying the inner space of the mixing cylinder 2, and interference to the stirring blades is generated.
As shown in fig. 1 and 4, the driving mechanism 5 includes a rotating shaft 14, one end of the rotating shaft 14 penetrates through the mixing drum 2 and is fixedly connected with the threaded rod 4, the rotating shaft 14 is rotatably connected with the mixing drum 2, the other end of the rotating shaft 14 is fixedly connected with a first bevel gear 15, a second bevel gear 16 is engaged with the outer side of the first bevel gear 15, one end of the second bevel gear 16 is fixedly connected with a connecting shaft 17, one end of the connecting shaft 17 is rotatably connected with a fixed block 18, the fixed block 18 is fixedly connected with the mixing drum 2, and a first motor 19 for driving the connecting shaft 17 to rotate is installed on the fixed block 18; the first motor 19 drives the connecting shaft 17 to rotate alternately in the forward direction or the reverse direction, and the threaded rod 4 is driven to rotate in a speed reduction manner under the transmission cooperation of the first bevel gear 15 and the second bevel gear 16, so that the sealing disc 6 is driven to move in the mixing drum 2 at a constant speed in a reciprocating manner.
As shown in fig. 4, the linkage mechanism 8 includes a housing 20, the housing 20 is fixedly connected to the mixing drum 2, two driven sprockets 21 are symmetrically disposed in the housing 20, one end of the stirring shaft 7 extends into the housing 20 and is fixedly connected to adjacent driven sprockets 21, the two driven sprockets 21 are respectively sleeved at two ends of the transmission chain 22, a driving sprocket 23 is sleeved at the center of the transmission chain 22, a second motor 24 is fixedly connected to the top of the housing 20, an output end of the second motor 24 extends into the housing 20 and is fixedly connected to the driving sprocket 23, the driving sprocket 23 is driven to rotate by the second motor 24, and the transmission chain 22 is driven to rotate, so that the two driven sprockets 21 synchronously rotate, and the two stirring shafts 7 are driven to rotate.
As shown in fig. 1 and 5, the pretreatment mechanism 3 includes a pretreatment tank 25 and a stirring assembly disposed therein, the stirring assembly includes a stirring frame and a stirring motor disposed in the pretreatment tank 25, which is a prior art and not described much, a conveying auger 26 is disposed on one side of the pretreatment tank 25, the conveying auger 26 is communicated with the pretreatment tank 25, and one side of the top is communicated with the feeding pipe 101, a charging opening is disposed on the pretreatment tank 25, the raw material of the microbial agent is added into the pretreatment tank 25 through the charging opening, and is premixed by the stirring assembly, and then the premixed raw material is conveyed into the mixing drum 2 through the conveying auger 26 for further processing.
One specific application of this embodiment is: in an initial state, the sealing disc 6 is positioned on one side of the feeding pipe 4, the sealing disc 6 divides the interior of the mixing cylinder 2 into two relatively independent mixing spaces with adjustable sizes, raw materials of the microbial agent are added into the pretreatment box 25 through a feeding port on the pretreatment box 25 and are premixed by the stirring assembly, and then the premixed raw materials are continuously and slowly conveyed into the mixing space on one side of the interior of the mixing cylinder 2 through the feeding pipe 101 by the conveying auger 26, so that the liquid level of the raw materials is positioned below the liquid level meter 10; at this time, the second motor 24 is started to drive the driving chain wheel 23 to rotate, and further drive the transmission chain 22 to rotate, so that the two driven chain wheels 21 synchronously rotate, and the two stirring shafts 7 are driven to simultaneously rotate and stir; after the raw materials in the mixing space are filled, the sealing disc 6 is moved to the other side of the feeding pipe 101 to feed the mixing space on the other side, and the raw materials in the mixing spaces on the two sides are mixed and stirred at the same time; when the raw materials in the mixing space at one side, in which the raw materials are filled, are well mixed, the moving disc 5 is continuously moved to reduce the mixing space, the liquid level height is continuously increased at the moment, the liquid level height is transmitted to the controller 9 as a signal output through the liquid level meter 10, and the electromagnetic valve 10 is driven to be opened and closed, so that the well-mixed raw materials are discharged from the corresponding discharge pipe 11; at this time, as the sealing disc 6 moves to the other side of the feeding pipe 101, the mixing space on the opposite side is continuously fed for mixing and stirring, when the raw materials in the mixing space are finished, the sealing disc 6 is continuously moved to reduce the mixing space, the liquid level of the slurry is raised, the liquid level is output as a signal through the liquid level meter 10 and is transmitted to the controller 9, the electromagnetic valve 10 is driven to be opened and closed, and the mixed raw materials are discharged from the corresponding discharge pipe 11; the operation is repeated, and the feeding and the discharging can be continuously carried out, so that the continuous production of the microbial agent is realized, and the working efficiency is improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to best understand the invention and its practical application. The present invention is limited only by the claims and their full scope and equivalents.

Claims (5)

1. The utility model provides an incessant generating device of microbial inoculum, includes bottom plate (1), bottom plate (1) top fixedly connected with mixing drum (2), mixing drum (2) outer disc center department intercommunication has inlet pipe (101), mixing drum (2) one side is equipped with preliminary treatment mechanism (3), preliminary treatment mechanism (3) are fixed in bottom plate (1) top and output and inlet pipe (101) intercommunication, its characterized in that:
a threaded rod (4) is connected to the interior of the mixing cylinder (2) in a rotating mode along the axial direction, one end of the threaded rod (4) penetrates through the mixing cylinder (2) and is connected with a driving mechanism (5) arranged on the outer side of the mixing cylinder (2), a sealing disc (6) is matched with the mixing cylinder (2) in a sliding mode, and the sealing disc (6) is in threaded fit with the threaded rod (4);
the stirring device is characterized in that stirring shafts (7) are rotatably connected to two ends in the mixing cylinder (2), stirring blades are uniformly fixed on the outer circular surface of each stirring shaft (7), the top ends of the stirring shafts (7) penetrate to the outer side of the mixing cylinder (2), and a linkage mechanism (8) for driving the two stirring shafts (7) to rotate is arranged at the top of the mixing cylinder (2);
controller (9) are installed to mixing drum (2) one end, the equal fixed mounting in both ends of mixing drum (2) has level gauge (10), mixing drum (2) bottom both ends department all is fixed the intercommunication has row material pipe (11), it is equipped with solenoid valve (12) on material pipe (11) to arrange, solenoid valve (12), level gauge (10) all with controller (9) electric connection.
2. The uninterrupted microbial inoculant generator as claimed in claim 1, wherein said mixing drum (2) has a sliding channel (201) formed on its inner wall, said threaded rod (4) is rotatably connected to said sliding channel (201), said sealing disc (6) has a sliding block (13) slidably engaged with said sliding channel (201) fixedly connected to its outer circumferential surface, and said sliding block (13) is threadedly connected to said threaded rod (4).
3. The uninterrupted microbial inoculant generating device according to claim 1, wherein the driving mechanism (5) comprises a rotating shaft (14), one end of the rotating shaft (14) penetrates through the mixing cylinder (2) and is fixedly connected with the threaded rod (4), the rotating shaft (14) is rotatably connected with the mixing cylinder (2), the other end of the rotating shaft (14) is fixedly connected with a first bevel gear (15), a second bevel gear (16) is meshed with the outer side of the first bevel gear (15), one end of the second bevel gear (16) is fixedly connected with a connecting shaft (17), one end of the connecting shaft (17) is rotatably connected with a fixing block (18), the fixing block (18) is fixedly connected with the mixing cylinder (2), and a first motor (19) for driving the connecting shaft (17) to rotate is installed on the fixing block (18).
4. The uninterrupted generator of microbial inoculant according to claim 1, characterized in that link gear (8) includes casing (20), casing (20) and mixing drum (2) fixed connection, the symmetry is equipped with two driven sprocket (21) in casing (20), (mixing) shaft (7) one end extend to in casing (20) respectively and with adjacent driven sprocket (21) fixed connection, two driven sprocket (21) overlap respectively and locate drive chain (22) both ends, drive chain (22) center department cover is equipped with drive sprocket (23), casing (20) top fixedly connected with second motor (24), second motor (24) output extend to in casing (20) and with drive sprocket (23) fixed connection.
5. The uninterrupted generation device of microbial inoculant according to claim 1, wherein the pretreatment mechanism (3) comprises a pretreatment tank (25) and a stirring assembly is arranged inside the pretreatment tank, the conveying auger (26) is arranged on one side of the pretreatment tank (25), the conveying auger (26) is communicated with the pretreatment tank (25), and one side of the top of the pretreatment tank is communicated with the feeding pipe (101).
CN202222596405.9U 2022-09-29 2022-09-29 Incessant generating device of microbial inoculum Active CN218521232U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222596405.9U CN218521232U (en) 2022-09-29 2022-09-29 Incessant generating device of microbial inoculum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222596405.9U CN218521232U (en) 2022-09-29 2022-09-29 Incessant generating device of microbial inoculum

Publications (1)

Publication Number Publication Date
CN218521232U true CN218521232U (en) 2023-02-24

Family

ID=85245833

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202222596405.9U Active CN218521232U (en) 2022-09-29 2022-09-29 Incessant generating device of microbial inoculum

Country Status (1)

Country Link
CN (1) CN218521232U (en)

Similar Documents

Publication Publication Date Title
CN109796235A (en) A kind of manufacturing equipment of bio-feritlizer
CN211462801U (en) Paper pulp stirring device for mica paper production
CN216223868U (en) Fluorescent glue preparation device for LED lamp production
CN218521232U (en) Incessant generating device of microbial inoculum
CN101066524B (en) Mixing tank with speeder and frame stirrer
CN201046390Y (en) Stirring tank with increase gears and frame type stirrer
CN215233929U (en) Homogenizing mixer for producing macroelement water-soluble fertilizer
CN217651129U (en) Fermentation is effectual fermentation cylinder for organic fertilizer of mixed fermentation
CN214715796U (en) Automatic batching and stirring equipment for pig breeding
CN216498902U (en) Water-soluble microbial fertilizer production and processing adds fungus machine with cylinder
CN215611554U (en) Discrete accelerator raw material reaction kettle
CN215654825U (en) Biological material mixing equipment for biotechnology
CN214076082U (en) Pneumatic stirring colloid clarifying tank
CN212894070U (en) High ammonia nitrogen industrial wastewater treatment device
CN214764935U (en) Helical gear stirrer capable of realizing rapid stirring of slurry
CN210695740U (en) Vacuum mixing stirrer for meat products
CN210646097U (en) Ferrotungsten processing raw material mixing device convenient for quantitative discharging
CN210171265U (en) Brickmaking material mixing machine
CN220918808U (en) Mixing arrangement of silane modified sealant
CN214076671U (en) Dispersant preparation feeding system
CN221471554U (en) Novel stirring equipment for producing color sand joint beautifying glue
CN217025812U (en) Fermentation equipment is used in fertilizer production
CN221656448U (en) Pig feed mixing processingequipment
CN211636093U (en) Mixing device for producing biological agent
CN215209175U (en) Fertilizer production fermenting installation

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant