CN216782267U - Concrete raw material feeding device - Google Patents

Concrete raw material feeding device Download PDF

Info

Publication number
CN216782267U
CN216782267U CN202123454174.XU CN202123454174U CN216782267U CN 216782267 U CN216782267 U CN 216782267U CN 202123454174 U CN202123454174 U CN 202123454174U CN 216782267 U CN216782267 U CN 216782267U
Authority
CN
China
Prior art keywords
storage bin
screen
lifter
hole
deflector roll
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
CN202123454174.XU
Other languages
Chinese (zh)
Inventor
黄灿荣
张群忠
吴康述
谢树春
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.)
Guangdong Chuanxin New Building Materials Co ltd
Original Assignee
Guangdong Chuanxin New Building Materials 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 Guangdong Chuanxin New Building Materials Co ltd filed Critical Guangdong Chuanxin New Building Materials Co ltd
Priority to CN202123454174.XU priority Critical patent/CN216782267U/en
Application granted granted Critical
Publication of CN216782267U publication Critical patent/CN216782267U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The utility model discloses a concrete raw material feeding device which comprises a first storage bin, a second storage bin and a conveying belt, wherein the first storage bin is provided with a first feeding hole and a first discharging hole, the first storage bin is connected with a first screen arranged at the first feeding hole, the first screen is used for separating foreign matters with the outer diameter larger than that of sand materials, and the first storage bin is also connected with a first switch valve used for opening or closing the first discharging hole; the second storage bin is provided with a second feeding hole and a second discharging hole, the second storage bin is connected with a second screen arranged at the second feeding hole, the second screen is used for separating foreign matters with the outer diameter larger than that of the stone materials, and the second storage bin is also connected with a second switch valve used for opening or closing the second discharging hole; the conveyer belt is connected with first discharge gate, second discharge gate, and the conveyer belt slope upwards extends and is used for transporting sand material and building stones to the agitator. The utility model can reduce the foreign matter amount brought into the stirrer, reduce the damage risk of the stirrer and effectively improve the quality of the concrete.

Description

Concrete raw material feeding device
Technical Field
The utility model relates to the technical field of building equipment, in particular to a concrete raw material feeding device.
Background
Concrete is an important and necessary building material in infrastructure construction, and at present, cement products are generally stirred at a cement mixing plant and then transported to a construction site by vehicles. Among the correlation technique, the concrete raw materials of piling up in advance can be mixed into the foreign matter unavoidably, leads to the feed end in cement mixing plant to bring the foreign matter into easily like branch etc. has the foreign matter in the raw materials on the one hand and leads to causing the stirring sword in cement mixing plant to damage easily, and on the other hand seriously influences the quality of concrete.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a concrete raw material feeding device capable of separating foreign matters.
According to the concrete raw material feeding device of the embodiment of the utility model, the concrete raw material feeding device comprises: the first storage bin is provided with a first feeding hole and a first discharging hole, the first storage bin is connected with a first screen arranged at the first feeding hole, the first screen is used for separating foreign matters with the outer diameter larger than that of sand materials, and the first storage bin is also connected with a first switch valve used for opening or closing the first discharging hole; the second storage bin is arranged on one side of the first storage bin and is provided with a second feeding hole and a second discharging hole, the second storage bin is connected with a second screen arranged at the second feeding hole, the second screen is used for separating foreign matters with the outer diameter larger than that of the stone materials, and the second storage bin is also connected with a second switch valve used for opening or closing the second discharging hole; the feed end of conveyer belt with first discharge gate, the second discharge gate is connected, the conveyer belt slope upwards extends and is used for transporting sand material and building stones to the agitator.
The technical scheme at least has the following beneficial effects: set up first screen cloth through the first feed inlet at first storage silo, can separate the foreign matter that the external diameter is greater than the external diameter of sand material, like the branch etc. set up the second screen cloth through the second feed inlet at the second storage silo, can separate the foreign matter that the external diameter is greater than the external diameter of building stones, like the branch etc. to reducible foreign matter volume of bringing into the agitator, reduce the risk that the foreign matter caused the damage to the agitator, and the foreign matter volume in the reducible concrete, effectively improve the quality of concrete.
According to some embodiments of the present invention, one end of the first screen is rotatably connected to the first storage bin, the first storage bin is further provided with a first lifter, one end of the first lifter is hinged to the first storage bin, and the other end of the first lifter is hinged to the first screen, and the first lifter is configured to drive the first screen to rotate.
According to some embodiments of the utility model, one end of the second screen is rotatably connected to the second storage bin, the second storage bin is further provided with a second lifter, one end of the second lifter is hinged to the second storage bin, the other end of the second lifter is hinged to the second screen, and the second lifter is used for driving the second screen to rotate.
According to some embodiments of the utility model, the conveyor belt is covered on the outside with a protective cover extending from the feed end to the discharge end of the conveyor belt.
According to some embodiments of the utility model, the conveyor belt comprises a base frame, a belt, a plurality of first guide rollers and a plurality of second guide rollers, the first guide rollers and the second guide rollers are rotatably mounted on the base frame, the plurality of first guide rollers are arranged at intervals along the conveying direction of the conveyor belt, the plurality of second guide rollers are arranged at intervals along the conveying direction of the conveyor belt, the first guide rollers and the second guide rollers are in one-to-one correspondence and are arranged in a V shape, and the belt is arranged on the plurality of first guide rollers and the plurality of second guide rollers.
According to some embodiments of the utility model, the base frame further comprises a magnet attached thereto, the magnet being removably mounted to the base frame, the magnet being located above the belt.
According to some embodiments of the utility model, a first guide plate is connected to the first storage bin, and extends from the first discharge port to the feed end of the conveyor belt; the second storage bin is connected with a second guide plate, and the second guide plate extends to the feeding end of the conveying belt from the second discharge hole.
According to some embodiments of the utility model, the first switch valve includes a baffle plate and a driving member, connecting rods are symmetrically arranged on two sides of the baffle plate, one end of each connecting rod is fixedly connected with the baffle plate, the other end of each connecting rod is hinged to the first storage bin, the baffle plate is arranged corresponding to the first discharge hole, one end of the driving member is hinged to the first storage bin, the other end of the driving member is hinged to the baffle plate, and the driving member is used for driving the baffle plate to rotate so as to open or close the first discharge hole.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a feeding device in an embodiment of the present invention;
FIG. 2 is a side view of a conveyor belt in an embodiment of the utility model;
fig. 3 is a partial structural schematic view of a conveyor belt according to an embodiment of the utility model.
Reference numerals:
a first storage bin 100; a first feed port 110; a first discharge port 120; a first screen 130; a first on-off valve 140; a baffle 141; a connecting rod 142; a driving member 143; a first lifter 150; a first guide plate 160;
a second storage bin 200; a second feed port 210; a second discharge port 220; a second screen 230; the second switching valve 240; a second lifter 250; a second guide plate 260;
a conveyor belt 300; a base frame 310; a belt 320; a first guide roller 330; a second guide roller 340; a magnet 350; a shield 360.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, an embodiment of the present invention provides a concrete raw material feeding apparatus, which includes a first storage bin 100 and a second storage bin 200, wherein the first storage bin 100 and the second storage bin 200 are both funnel-shaped for discharging. The first storage bin 100 is used for storing sand materials, the second storage bin 200 is used for storing stone materials, and the second storage bin 200 is arranged on one side of the first storage bin 100. The upper end of the first storage bin 100 is provided with a first feed inlet 110, the first feed inlet 110 is open, the lower end is provided with a first discharge outlet 120, the top of the first storage bin 100 is connected with a first screen 130 arranged at the first feed inlet 110, the mesh of the first screen 130 allows sand to pass through, but does not allow foreign matters with outer diameters larger than the outer diameter of the sand to pass through, such as branches, large-diameter stones and the like, so that in the process of loading the sand into the first storage bin 100, the foreign matters with outer diameters larger than the outer diameter of the sand can be effectively separated, the foreign matters in the first storage bin 100 can be reduced, and further, the foreign matters brought into the stirrer can be reduced. The lower extreme of first storage silo 100 is connected with first ooff valve 140, and first ooff valve 140 can open or close first discharge gate 120 to can realize the ration ejection of compact according to the load of actual demand control sand material.
Referring to fig. 1, it can be understood that, similarly, the second storage bin 200 is provided with a second feeding hole 210 at the upper end, the second feeding hole 210 is open, the second discharging hole 220 is provided at the lower end, the top of the second storage bin 200 is connected with a second screen 230 provided at the second feeding hole 210, the screen hole of the second screen 230 allows the stone to pass through, but does not allow the foreign matters with the outer diameter larger than the outer diameter of the stone, such as branches, large-diameter stones, etc., to pass through, so that the foreign matters with the outer diameter larger than the outer diameter of the stone can be effectively separated in the process of loading the stone into the second storage bin 200, the foreign matters in the second storage bin 200 can be reduced, and the foreign matters brought into the stirrer can be reduced. The lower extreme of second storage silo 200 is connected with second ooff valve 240, and second ooff valve 240 can open or close second discharge gate 220 to can realize the ration ejection of compact according to the load of actual demand control building stones.
Referring to fig. 1 and 2, it can be understood that the concrete raw material feeding device further includes a conveyer belt 300, the conveyer belt 300 is located between the first storage bin 100 and the second storage bin 200, the conveyer belt 300 extends obliquely upward, a lower end of the conveyer belt 300 is a feeding end, an upper end of the conveyer belt 300 is a discharging end, the feeding end of the conveyer belt 300 is connected with the first discharging port 120 and the second discharging port 220, the discharging end of the conveyer belt 300 is connected with a stirrer, and the stirrer is a device for mixing raw materials to form concrete. Therefore, sand and stone can be conveyed to the stirrer (not shown in the figure) through the conveying belt 300, and the sand and stone stirring device is simple in structure and easy to realize.
Through setting up first screen cloth 130 at first feed inlet 110 of first storage silo 100, can separate the foreign matter that the external diameter is greater than the external diameter of sand material, such as branch, major diameter stone etc. through set up second screen cloth 230 at second feed inlet 210 of second storage silo 200, can separate the foreign matter that the external diameter is greater than the external diameter of building stones, such as branch, major diameter stone etc. thereby reducible foreign matter volume of bringing into the agitator, reduce the risk that the foreign matter caused the damage to the agitator, and the foreign matter volume in the reducible concrete, effectively improve the quality of concrete.
Referring to fig. 1, it can be understood that one side edge of the first screen 130 is rotatably connected to the first storage bin 100 through a rotating shaft, the first storage bin 100 is further provided with a first lifter 150, such as a lifting cylinder, one end of the first lifter 150 is hinged to the first storage bin 100, the other end is hinged to the first screen 130, and the first lifter 150 is far away from the rotating shaft of the first screen 130, the first lifter 150 can drive the first screen 130 to rotate, so that the first screen 130 can be obliquely arranged or even turned over. Therefore, when the foreign matter accumulation on the first screen 130 is more, the first screen 130 is driven to rotate by the first lifter 150, so that the first screen 130 is obliquely arranged and even overturned, the foreign matter on the first screen 130 slides down, the sand feeding is prevented from being influenced by the blockage of the first screen 130, the foreign matter on the first screen 130 is automatically cleaned, the manual cleaning is not needed, the labor intensity is reduced, and the structure is simple and easy to realize.
Referring to fig. 1, it can be understood that, similarly, one side edge of the second screen 230 is rotatably connected to the second storage bin 200 through a rotating shaft, the second storage bin 200 is further provided with a second lifter 250, such as a lifting cylinder, one end of the second lifter 250 is hinged to the second storage bin 200, the other end of the second lifter 250 is hinged to the second screen 230, and the second lifter 250 is far away from the rotating shaft of the second screen 230, and the second lifter 250 can drive the second screen 230 to rotate, so that the second screen 230 can be obliquely arranged or even turned over. Therefore, when the foreign matters on the second screen 230 are accumulated more, the second screen 230 can be driven to rotate by the second lifter 250, so that the second screen 230 is obliquely arranged and even overturned, the foreign matters on the second screen 230 can slide off, influence on stone feeding due to blockage of the second screen 230 can be avoided, automatic cleaning of the foreign matters on the second screen 230 can be realized, manual cleaning is not needed, labor intensity is reduced, and the structure is simple and easy to realize.
Referring to fig. 2, it can be understood that the outer side of the conveyer belt 300 is covered with the protective cover 360, the protective cover 360 extends from the feeding end of the conveyer belt 300 to the discharging end, the protective cover 360 can be an iron plate, the protective cover 360 covers the two sides and the top of the conveyer belt 300, thereby preventing foreign matters such as plastic bags and leaves which can be blown up by wind from flying into the conveyer belt 300, further reducing the foreign matters amount brought into the mixer, reducing the risk of damage of the mixer caused by the foreign matters, reducing the foreign matters amount in the concrete, and effectively improving the quality of the concrete.
Referring to fig. 1 to 3, it can be understood that the conveyor belt 300 includes a base frame 310, a belt 320, a plurality of first guide rollers 330 and a plurality of second guide rollers 340, wherein the first guide rollers 330 and the second guide rollers 340 are rotatably mounted on the base frame 310, the plurality of first guide rollers 330 are arranged at equal intervals along the conveying direction of the conveyor belt 300, the plurality of second guide rollers 340 are arranged at equal intervals along the conveying direction of the conveyor belt 300, the first guide rollers 330 and the second guide rollers 340 are arranged in a one-to-one correspondence and symmetrical manner, the first guide rollers 330 and the second guide rollers 340 are arranged in a V-shape, and the belt 320 is wound on the plurality of first guide rollers 330 and the plurality of second guide rollers 340 to form a V-shaped conveyor groove. Generally, the belt 320 is rotated by a motor to perform transmission. When the sand and the stone are conveyed by the belt 320, the sand and the stone are gathered in the middle of the belt 320 and conveyed upwards, namely the sand and the stone are positioned at the bottom of the V-shaped conveying groove, so that the risk of falling of the sand and the stone in the conveying process can be reduced, the safety is improved, and the reliability of conveying the sand and the stone is improved.
Referring to fig. 3, it can be understood that the magnet 350 is detachably mounted on the base frame 310, and the magnet 350 is located above the belt 320, so that in the process of conveying sand and stone, iron fragments and other foreign matters in the sand and stone, which can be absorbed by the magnet 350, and further the amount of foreign matters brought into the mixer can be reduced, the risk of damage to the mixer caused by the foreign matters is reduced, and the amount of foreign matters in the concrete is further reduced, thereby effectively improving the quality of the concrete. When the magnet 350 absorbs a large amount of foreign materials, the magnet 350 can be detached to clean the foreign materials or replace the magnet 350, thereby improving the reliability of the magnet 350.
Referring to fig. 1, it can be understood that the first guide plate 160 is connected to the first storage bin 100, the first guide plate 160 is disposed below the first discharge port 120, the first guide plate 160 is disposed to be inclined downward, and the lower end of the first guide plate 160 extends to above the feeding end of the conveyor belt 300. Similarly, the second storage bin 200 is connected with a second guide plate 260, the second guide plate 260 is disposed below the second discharge hole 220, the second guide plate 260 is arranged in a downward inclined manner, and the lower end of the second guide plate 260 extends to the upper side of the feeding end of the conveying belt 300. When the first storage bin 100 discharges, the sand is guided to the feeding end of the conveying belt 300 through the first guide plate 160, and when the second storage bin 200 discharges, the stone is guided to the feeding end of the conveying belt 300 through the second guide plate 260, so that the feeding end of the conveying belt 300 is connected with the first discharge hole 120 and the second discharge hole 220 simultaneously, the structure is simple, the realization is easy, and the discharging is convenient. It is understood that the first guide plate 160 and the second guide plate 260 may have a V-shaped structure to prevent sand or stone from falling, to improve safety, and to ensure accuracy of the discharged amount.
Referring to fig. 1, it can be understood that the first on-off valve 140 includes a baffle 141 and a driving element 143, the driving element 143 may be an air cylinder, connecting rods 142 are symmetrically disposed on both sides of the baffle 141, one end of each connecting rod 142 is fixedly connected to the baffle 141, the other end of each connecting rod 142 is hinged to the first storage bin 100, the baffle 141 is disposed corresponding to the first discharge hole 120, one end of each driving element 143 is hinged to the first storage bin 100, and the other end of each driving element 143 is hinged to the baffle 141, so that the baffle 141 can be driven to rotate by the driving element 143, the baffle 141 completely covers the first discharge hole 120, and the first discharge hole 120 is closed; or the baffle 141 and the first discharge hole 120 are partially or completely staggered, the first discharge hole 120 is opened so as to discharge the sand material, the discharge flow of the sand material can be controlled, and the sand discharge device is simple in structure and easy to realize.
It is understood that the second switching valve 240 has the same structure as the first switching valve 140 and thus will not be described in detail herein. Thereby controlling the discharge flow of the stone material.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (8)

1. Concrete raw materials feed arrangement, its characterized in that includes:
the first storage bin is provided with a first feeding hole and a first discharging hole, the first storage bin is connected with a first screen arranged at the first feeding hole, the first screen is used for separating foreign matters with the outer diameter larger than that of sand materials, and the first storage bin is also connected with a first switch valve used for opening or closing the first discharging hole;
the second storage bin is arranged on one side of the first storage bin and is provided with a second feeding hole and a second discharging hole, the second storage bin is connected with a second screen arranged at the second feeding hole, the second screen is used for separating foreign matters with the outer diameter larger than that of the stone materials, and the second storage bin is also connected with a second switch valve used for opening or closing the second discharging hole;
the feed end of conveyer belt with first discharge gate, the second discharge gate is connected, the conveyer belt slope upwards extends and is used for transporting sand material and building stones to the agitator.
2. A concrete raw material feeding device according to claim 1, characterized in that: one end of the first screen is rotatably connected to the first storage bin, the first storage bin is further provided with a first lifter, one end of the first lifter is hinged to the first storage bin, the other end of the first lifter is hinged to the first screen, and the first lifter is used for driving the first screen to rotate.
3. A concrete raw material feeding device according to claim 1, characterized in that: one end of the second screen is rotatably connected to the second storage bin, the second storage bin is further provided with a second lifter, one end of the second lifter is hinged to the second storage bin, the other end of the second lifter is hinged to the second screen, and the second lifter is used for driving the second screen to rotate.
4. A concrete raw material feeding device according to claim 1, characterized in that: the outside cover of conveyer belt is equipped with the protection casing, the protection casing by the feed end of conveyer belt extends to the discharge end.
5. A concrete raw material feeding device according to claim 1, characterized in that: the conveyer belt includes bed frame, belt, a plurality of first deflector roll and a plurality of second deflector roll, first deflector roll and second deflector roll all rotate install in the bed frame, a plurality of first deflector roll are followed the direction of delivery interval of conveyer belt sets up, and a plurality of second deflector roll are followed the direction of delivery interval of conveyer belt sets up, and first deflector roll and second deflector roll one-to-one are the V-arrangement, the belt is located a plurality ofly first deflector roll and a plurality of on the second deflector roll.
6. A concrete raw material feeding device according to claim 5, characterized in that: the base frame is further connected with a magnet, the magnet is detachably mounted on the base frame, and the magnet is located above the belt.
7. A concrete raw material feeding device according to claim 1, characterized in that: the first storage bin is connected with a first guide plate, and the first guide plate extends from the first discharge hole to the feeding end of the conveying belt; the second storage bin is connected with a second guide plate, and the second guide plate extends to the feeding end of the conveying belt from the second discharge hole.
8. A concrete raw material feeding device according to claim 1, characterized in that: the first switch valve comprises a baffle and a driving piece, connecting rods are symmetrically arranged on two sides of the baffle, one end of each connecting rod is fixedly connected with the baffle, the other end of each connecting rod is hinged to the first storage bin, the baffle is correspondingly arranged with the first discharge hole, one end of the driving piece is hinged to the first storage bin, the other end of the driving piece is hinged to the baffle, and the driving piece is used for driving the baffle to rotate so as to open or close the first discharge hole.
CN202123454174.XU 2021-12-31 2021-12-31 Concrete raw material feeding device Active CN216782267U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202123454174.XU CN216782267U (en) 2021-12-31 2021-12-31 Concrete raw material feeding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202123454174.XU CN216782267U (en) 2021-12-31 2021-12-31 Concrete raw material feeding device

Publications (1)

Publication Number Publication Date
CN216782267U true CN216782267U (en) 2022-06-21

Family

ID=82013256

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202123454174.XU Active CN216782267U (en) 2021-12-31 2021-12-31 Concrete raw material feeding device

Country Status (1)

Country Link
CN (1) CN216782267U (en)

Similar Documents

Publication Publication Date Title
CN108356983A (en) A kind of building concrete stirring system
CN216782267U (en) Concrete raw material feeding device
CN216782275U (en) Concrete mixing plant
CN207888934U (en) One kind four selects door concrete mixing plant
CN215050059U (en) Intelligent integrated equipment of drying in air of stand
CN211091821U (en) Automatic feed proportioning system
CN203899472U (en) Stirring device convenient for stirring materials
CN211733213U (en) Whole car granule material sampling equipment
CN107803931A (en) One kind stirring production line
CN209583086U (en) Self-cleaning type feed device for feed additive production line
CN209680495U (en) A kind of novel sandstone roller screen device
CN109941706A (en) A kind of material leak-proof horizontal conveyer
KR200453178Y1 (en) Cereals sorting machine
CN217411041U (en) Prevent feed processing reducing mechanism that piece splashes
CN118001988B (en) Daily ration storage mixing arrangement
CN218365927U (en) Crushing and collecting device of waste air conditioner shell
CN214214254U (en) Stirring structure of stirrer for concrete
CN220950267U (en) PVC plastic particle conveying equipment with anti-blocking function
CN211074422U (en) Feeding device for casting machine
CN211274467U (en) Matrix compounding device
CN220162811U (en) Reinforced concrete stirring device
CN219709669U (en) Automatic winnowing cotton mixing machine
CN114347261B (en) Slurry preparation method
CN214430968U (en) Feeding device capable of controlling feeding
CN215611330U (en) Automatic blending device for concentration of snow melting agent

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant