CN212232570U - Modern beef cattle breeding farm based on standardized fattening technology - Google Patents

Modern beef cattle breeding farm based on standardized fattening technology Download PDF

Info

Publication number
CN212232570U
CN212232570U CN202020732100.4U CN202020732100U CN212232570U CN 212232570 U CN212232570 U CN 212232570U CN 202020732100 U CN202020732100 U CN 202020732100U CN 212232570 U CN212232570 U CN 212232570U
Authority
CN
China
Prior art keywords
breeding farm
beef cattle
standardized
passageway
transmission shaft
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
CN202020732100.4U
Other languages
Chinese (zh)
Inventor
杨菊凤
李秀丽
田慧丽
张善芝
刘洪波
杜迎春
陈全安
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.)
Shandong Vocational Animal Science and Veterinary College
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 CN202020732100.4U priority Critical patent/CN212232570U/en
Application granted granted Critical
Publication of CN212232570U publication Critical patent/CN212232570U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Feeding And Watering For Cattle Raising And Animal Husbandry (AREA)

Abstract

The utility model discloses a modern beef cattle breeding farm based on a standardized fattening technology, wherein the breeding farm is rectangular, rails are arranged around the breeding farm, and a gate is arranged at the intersection of a middle passageway and a longitudinal rail; two areas of the breeding farm are sequentially divided into a plurality of independent cowsheds along the direction of the passageway, and the entrances of the cowsheds face the passageway; a water tank and a feeding trough are arranged in each cowshed; the trough is arranged on one side of the cowshed close to the fence parallel to the passageway; two penetrating material conveying rails are also arranged in the breeding farm; the material transporting vehicle runs along the material transporting track and puts feed into a cowshed along the way. The utility model discloses a beef cattle breeding farm has realized automatic feeding, the human input that has not only significantly reduced has realized the management that becomes more meticulous moreover, can feed the side to the different individual customizations in the beef cattle population to through scientific feeding, improve the digestion of fodder, absorption rate fast, make the daily gain of beef cattle increase.

Description

Modern beef cattle breeding farm based on standardized fattening technology
Technical Field
The utility model relates to a livestock-raising field, concretely relates to modern beef cattle breeding farm based on standardized fattening technique.
Background
At present, scientific breeding management is an important guarantee for the development of beef cattle breeding industry, and any good breed with high yield performance, such as improper breeding management, cannot show good production potential and advantages, and even can degrade the good breed, cause the health of an individual to decline, and the weight to decline, so that the production capacity is lost.
The traditional feeding environment is changed, the incidence rate of beef cattle diseases can be obviously reduced, the production performance of beef cattle is improved, and high-quality meat products are produced. The beef cattle can eat a proper amount of feed with balanced nutrition at a proper stage to obtain the highest weight gain, the best feed remuneration and the maximum profit.
Beef cattle like to eat fresh feed, and less feeding and frequent adding are needed when the beef cattle are fed. The cattle fed by the feed is too much at one time, and is hunched by the cattle for a long time in the feed trough and is stuck with secretion at the rhinoscope of the cattle, so the cattle do not like to eat. Therefore, if fresh feed can be delivered on time, the digestion and absorption rate of the feed can be improved, and the daily gain of the beef cattle is increased.
At present, in the industry, beef cattle breeding is rarely carried out by dividing a small-area cowshed into cattle pens, and cattle groups often live in a large cattle pen by taking hundreds of cattle as a group instantly. In addition, the feeding process is relatively extensive, and the feeding workload is usually reduced as much as possible for convenience, so that food is supplied as much as possible in each feeding, and food waste or uneven growth of beef cattle is inevitably caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a modern beef cattle breeding farm based on standardized fattening technology, in order to solve the technical problems.
The utility model discloses a realize according to following technical scheme:
a modern beef cattle breeding farm based on a standardized fattening technology is characterized in that the breeding farm is rectangular, fences are arranged on the periphery of the breeding farm, and a passageway in the middle of the breeding farm crosses the breeding farm and divides the breeding farm into two areas; the fences comprise two longitudinal fences perpendicular to the aisle and two transverse fences parallel to the aisle; a gate is arranged at the intersection of the passageway and the longitudinal fence; the two areas of the breeding farm are sequentially divided into a plurality of independent cowsheds along the direction of the passageway, and the entrances of the cowsheds face the passageway; a water tank and a feeding trough are arranged in each cowshed; the trough is arranged on one side of the cowshed close to the fence parallel to the passageway; two penetrating material conveying rails are further arranged in the breeding farm; the material transporting vehicle runs along the material transporting track and puts feed into a cowshed along the way; and a plurality of supports are also arranged in the breeding farm along the passageway, and water supply pipelines and power supply pipelines are arranged at the tops of the supports.
Furthermore, two-stage step-shaped bases parallel to the two transverse fences are arranged beside the two transverse fences in the breeding farm, a material conveying track is laid on a step at the high position of each base, and a trough is placed on a step at the low position of each base; railings for preventing beef cattle from entering are arranged beside the feeding trough and the water trough.
Further, the material conveying vehicle comprises a material box positioned at the top and a movable base positioned at the bottom; the movable base is provided with wheels and is provided with a power motor for driving the wheels to rotate.
Furthermore, a hopper is arranged in the material box, two first discharge ports are formed at the bottom of the hopper, and the first discharge ports are connected with a guide cylinder with a rectangular cross section; the bottom plate of the hopper forms an inclined downward inclined surface from the periphery to the discharge hole, so that the feed is collected towards the first discharge hole under the action of gravity.
Furthermore, a stirring impeller is arranged in the material guide cylinder, a material tray is arranged below the material guide cylinder, and the material tray is connected with a connecting rod through a Y-shaped support; the middle part of the connecting rod is connected with the movable fulcrum to form a lever structure; the tail end of the connecting rod is connected with a balancing weight; and two arms of the Y-shaped support are respectively and movably connected with two side walls of the material tray.
Furthermore, a first motor is arranged in the material box, the first motor drives a first transmission shaft arranged along the horizontal direction to rotate, the first transmission shaft is driven by a gear set to be arranged along the horizontal direction and a third transmission shaft perpendicular to the first transmission shaft to rotate, and the tail end of the third transmission shaft is connected with a stirring impeller.
Further, a second discharge hole is formed in the bottom of the material box below the first discharge hole, a material turning rod used for enabling the material tray to turn is arranged at the second discharge hole, the material turning rod is a hard metal rod, one end of the material turning rod is connected with a second transmission shaft, and the second transmission shaft is connected with a rotor of a second motor.
Furthermore, two guide chutes which are inclined downwards are arranged on the movable base, the upper ends of the guide chutes are positioned right below the second discharge hole, and the lower ends of the guide chutes extend to the upper side of the feed trough.
Furthermore, an angle sensor is arranged on the connecting rod.
The utility model has the advantages and beneficial effects that:
the utility model discloses a beef cattle breeding farm has realized automatic feeding, the human input that has not only significantly reduced has realized the management that becomes more meticulous moreover, can feed the side to the different individual customizations in the beef cattle population to through scientific feeding, improve the digestion of fodder, absorption rate fast, make the daily gain of beef cattle increase.
Drawings
Fig. 1 is a top view of the present invention;
FIG. 2 is a schematic view of the feed car of the present invention delivering feed to the trough;
FIG. 3 is a schematic view (side view) of the internal structure of the material box of the present invention;
FIG. 4 is a schematic view (front view) of the internal structure of the material box of the present invention;
fig. 5 is a top view of the hopper of the present invention;
fig. 6 is a schematic structural view of the material turning mechanism of the present invention;
fig. 7 is a schematic view of the tray of the present invention turned over (not turned over);
fig. 8 is a schematic view of the tray turning over (turned over) in the present invention.
Wherein, 1, the fence; 2. a cowshed; 201. a railing; 202. a water tank; 203. a trough; 3. a material transporting vehicle; 4. a material conveying track; 5. an aisle; 6. a base; 7. a material box; 701. a hopper; 702. a first motor; 703. a stirring impeller; 704. a first drive shaft; 705. a balancing weight; 706. a connecting rod; 707. a movable fulcrum; 708. a material tray; 709. a material turning rod; 710. a second motor; 711. a second drive shaft; 712. a partition plate; 713. a material guide cylinder; 714. a third drive shaft; 8. moving the base; 9. a material guide groove.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1-8, a modern beef cattle breeding farm based on a standardized fattening technology is rectangular, a fence 1 is arranged on the periphery of the breeding farm, and a passageway 5 is arranged in the middle of the breeding farm and penetrates through the breeding farm to divide the breeding farm into two areas; the fence 1 comprises two longitudinal fences perpendicular to the aisle 5 and two transverse fences parallel to the aisle; a gate is arranged at the intersection of the passageway 5 and the longitudinal fence; the two areas of the breeding farm are sequentially divided into a plurality of independent cowsheds 2 along the direction of the passageway 5, and the inlets of the cowsheds 2 face the passageway 5; each cowshed 2 is provided with a water tank 202 and a food tank 203; the trough 203 is arranged at one side of the cowshed 2 close to the fence 1 parallel to the passageway 5; two penetrating material conveying rails 4 are also arranged in the breeding farm; the material transporting vehicle 3 runs along the material transporting track 4 and puts feed into the cowshed 2 along the way; a plurality of supports are also deployed in the breeding farm along the aisles 5, and water supply lines and power supply lines are arranged at the tops of the supports.
Further, two-stage step-shaped bases 6 parallel to the two transverse fences are arranged beside the two transverse fences in the breeding farm, a material conveying track 4 is laid on a step at the high position of each base 6, and a feeding trough 203 is placed on a step at the low position; a railing 201 for blocking the beef cattle from entering is arranged beside the feeding trough 203 and the water trough 202.
Further, the material transporting vehicle 3 comprises a material box 7 at the top and a movable base 8 at the bottom; the movable base 8 is provided with wheels and is provided with a power motor for driving the wheels to rotate.
Further, a hopper 701 is arranged in the feed box 7, two first discharge ports are formed at the bottom of the hopper 701, and the first discharge ports are connected with a guide cylinder 713 with a rectangular cross section; the bottom plate of the hopper 701 forms an inclined downward slope from the periphery to the discharge port, so that the feed is collected towards the first discharge port under the action of gravity.
Further, a stirring impeller 703 is arranged in the material guide cylinder 713, a material tray 708 is arranged below the material guide cylinder 713, and the material tray 708 is connected with the connecting rod 706 through a Y-shaped bracket; the middle part of the connecting rod 706 is connected with a movable fulcrum 707 to form a lever structure; the end of the connecting rod 706 is connected with a balancing weight 705; two arms of the Y-shaped bracket are respectively and movably connected with two side walls of the material tray 708.
Further, a first motor 702 is arranged in the material box 7, the first motor 702 drives a first transmission shaft 704 arranged in the horizontal direction to rotate, the first transmission shaft 704 drives a third transmission shaft 714 arranged in the horizontal direction and perpendicular to the first transmission shaft 704 to rotate through a gear set, and the end of the third transmission shaft 714 is connected with a stirring impeller 703.
Further, a second discharge hole is formed in the bottom of the material box below the first discharge hole, a material turning rod 709 for turning the material tray 708 is arranged at the second discharge hole, the material turning rod 709 is a hard metal rod, one end of the material turning rod is connected with a second transmission shaft 711, and the second transmission shaft 711 is connected with a rotor of a second motor 710.
Further, two guide chutes 9 are provided on the movable base 8, the upper ends of the guide chutes 9 are located right below the second discharge port, and the lower ends of the guide chutes 9 extend to the upper side of the feeding trough 203.
Further, an angle sensor is arranged on the connecting rod 706.
The principle and the using method of the utility model are as follows:
the breeding farm divides a plurality of regions, and its effect lies in being convenient for carry out the management that becomes more meticulous to the herd, sees that although the construction cost increases on the surface, also has the advantage, is convenient for on the one hand to the population classification, adopts customized breed tactics, for example to the independent feed supply of different herds, has realized the differentiation and has fed, makes the herd whole health condition get good. On the other hand, the outbreak of infectious diseases can be effectively avoided. In addition, in beef cattle raising, feeding is carried out for multiple times, but the feeding amount of each feeding needs to be controlled; through the utility model provides a dumper can realize this target under the condition that does not need too much manpower to participate in.
The water tanks 202 are used for providing drinking water for the cattle in the cowshed 2, and are directly connected with the water tanks 202 through water pipes.
The purpose of the rail 201 is to prevent cattle from rushing out of the cowshed 2 in the direction of the trough 202 and trough 203.
When feed needs to be supplied to the cattle in the cowshed, the raw materials with different components are mixed uniformly in proportion in advance and then put into a hopper 701; the hopper 701 is mounted on the movable base 8. The main body of the movable base 8 is a steel frame, and a power mechanism of the electric vehicle is arranged on the steel frame and comprises a battery and a motor. The mobile base 8 moves along the material conveying track 4.
The cross-section of the material conveying track 4 is U-shaped and is made of cement, and the flanges on the two sides prevent the material conveying vehicle 3 from deviating from the material conveying track 4 in the operation process.
When the stirring impeller 703 is stationary, the feed does not leak out. The material transporting vehicle 3 is driven to put in the feed to each cowshed 2 along the material transporting track 4, and when the material transporting vehicle 3 travels to one of the cowsheds 2 which is not put in, the material transporting vehicle 3 stops. The first motor 702 rotates and indirectly drives the stirring impeller 703 through the first transmission shaft 704 and the third transmission shaft 714, so that the stirring fodder gradually falls from the first discharge hole and into the material tray 708.
The more the feed in the feed tray 708 is accumulated, the feed tray 708 is gradually pressed down to drive the force arm of the lever structure where the feed tray is located to gradually incline, namely the tail end of the connecting rod 706 gradually tilts upwards, the movable fulcrum 707 is fixed on the feed box 7, and a cylindrical metal rod can be actually adopted; the connecting rod 706 is provided with a hole and is sleeved on the metal rod, so that the angle sensors on the connecting rods 706 at two ends of the connecting rod detect the inclination angle of the connecting rod 706, and when the inclination angle reaches a certain threshold value (corresponding to the position where the charging tray 708 contacts the material turning rod 709), the first motor 702 is controlled to stop rotating, so that the stirring impeller 703 stops rotating, and the feed does not fall down. The inclination angle detection can select an angle sensor module taking an SW-520D type angle sensor as a core; when the tilt angle reaches a critical value, the SW-520D angle sensor is kept horizontal. As the angle of inclination decreases to one side, the SW-520D angle sensor tilts to that side, triggering the angle sensor to sense the change. The angle value does not need to be accurately quantized, and only needs to know whether the inclination angle of the connecting rod 706 exceeds a critical value, so that the SW-520D type angle sensor module which is low in cost, simple in function and wide in application completely meets the requirements.
The second motor 710 rotates to drive the turning rod 709 to rotate through the second transmission shaft 711, so as to turn the material tray 708, as shown in fig. 7 and 8, after the material tray 708 is turned, the feed therein is poured out from the second discharge hole and slides into the feeding trough 203 along the material guiding groove 9.
The box 7 is provided with a partition 712 having an H-shaped cross section, and the second transmission shaft 711 and the third transmission shaft 714 pass through the partition 712 and are connected thereto through bearings. The partition 712 is fixed to the case 7.
The material tray 708 completes one material storage and pouring process for one period; therefore, when the weight of the weight 705 is determined, the weight of the feed poured out in each period can be conveniently determined in a quantitative manner; considering the number of times again, the total amount of feed in one trough 203 can be confirmed.
In summary, the amount of feed added to each cowshed 2 can be controlled relatively accurately.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 by those of ordinary skill in the art through specific situations.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.

Claims (9)

1. A modern beef cattle breeding farm based on a standardized fattening technology is rectangular, fences (1) are arranged on the periphery of the breeding farm, and a passageway (5) is arranged in the middle of the breeding farm and penetrates through the breeding farm to divide the breeding farm into two areas; the fence (1) comprises two longitudinal fences perpendicular to the aisle (5) and two transverse fences parallel to the aisle (5); a gate is arranged at the intersection of the passageway (5) and the longitudinal fence; the breeding farm is characterized in that two areas of the breeding farm are sequentially divided into a plurality of independent cowsheds (2) along the direction of the passageway (5), and inlets of the cowsheds (2) face the passageway (5); each cowshed (2) is internally provided with a water tank (202) and a food tank (203); the trough (203) is arranged on one side of the cowshed (2) close to the fence (1) parallel to the passageway (5); two through material conveying rails (4) are also arranged in the breeding farm; the material conveying vehicle (3) runs along the material conveying track (4) and feeds the cattle shed (2) along the way.
2. The modern beef cattle breeding farm based on the standardized fattening technology as claimed in claim 1, wherein a two-stage step-shaped base (6) is arranged beside each of the two transverse fences in the breeding farm, a material conveying rail (4) is laid on the upper step of the base (6), and a feeding trough (203) is placed on the lower step; railings (201) for preventing beef cattle from entering are arranged beside the feeding trough (203) and the water trough (202).
3. A modern beef cattle breeding farm based on standardized fattening technology as in claim 1, characterized by the fact that the trolley (3) comprises a bin (7) at the top and a mobile base (8) at the bottom; wheels are arranged on the movable base (8), and a power motor for driving the wheels to rotate is arranged.
4. The modern beef cattle breeding farm based on the standardized fattening technology as claimed in claim 3, wherein the bin (7) is provided with a hopper (701), two first discharge ports are formed at the bottom of the hopper (701), and the two first discharge ports are respectively connected with a guide cylinder (713) with a rectangular cross section; the bottom plate of the hopper (701) forms an inclined downward inclined surface from the periphery to the discharge hole, so that the feed is collected towards the first discharge hole under the action of gravity.
5. The modern beef cattle breeding farm based on the standardized fattening technology as claimed in claim 4, wherein a stirring impeller (703) is arranged in the material guiding cylinder (713), a material tray (708) is arranged below the material guiding cylinder (713), and the material tray (708) is connected with the connecting rod (706) through a Y-shaped bracket; the middle part of the connecting rod (706) is connected with a movable fulcrum (707) to form a lever structure; the tail end of the connecting rod (706) is connected with a balancing weight (705); two arms of the Y-shaped bracket are respectively and movably connected with two side walls of the material tray (708).
6. A modern beef cattle breeding farm based on standardized fattening technology as in claim 4, characterized in that the bin (7) is provided with a first motor (702), the first motor (702) drives a first transmission shaft (704) disposed in a horizontal direction to rotate, the first transmission shaft (704) drives a third transmission shaft (714) disposed in a horizontal direction and perpendicular to the first transmission shaft (704) to rotate through a gear set, and the end of the third transmission shaft (714) is connected with a stirring impeller (703).
7. The modern beef cattle breeding farm based on the standardized fattening technology as claimed in claim 4, wherein a second discharge port is formed at the bottom of the feed box below the first discharge port, a material turning rod (709) for turning the feed tray (708) is arranged at the second discharge port, one end of the material turning rod (709) is connected with a second transmission shaft (711), and the second transmission shaft (711) is connected with a rotor of a second motor (710).
8. The modern beef cattle breeding farm based on the standardized fattening technology as claimed in claim 3 or 7, wherein the moving base (8) is provided with two guide chutes (9) which are inclined downwards, the upper ends of the guide chutes (9) are located right below the second discharge port, and the lower ends of the guide chutes (9) extend to the upper side of the feeding trough (203).
9. A modern beef cattle breeding farm based on standardized fattening technology as claimed in claim 5, characterized in that the connecting rod (706) is provided with an angle sensor.
CN202020732100.4U 2020-05-07 2020-05-07 Modern beef cattle breeding farm based on standardized fattening technology Expired - Fee Related CN212232570U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020732100.4U CN212232570U (en) 2020-05-07 2020-05-07 Modern beef cattle breeding farm based on standardized fattening technology

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020732100.4U CN212232570U (en) 2020-05-07 2020-05-07 Modern beef cattle breeding farm based on standardized fattening technology

Publications (1)

Publication Number Publication Date
CN212232570U true CN212232570U (en) 2020-12-29

Family

ID=73999482

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020732100.4U Expired - Fee Related CN212232570U (en) 2020-05-07 2020-05-07 Modern beef cattle breeding farm based on standardized fattening technology

Country Status (1)

Country Link
CN (1) CN212232570U (en)

Similar Documents

Publication Publication Date Title
CN201308045Y (en) Feeding system of pigsty
CN102499121B (en) Full-automatic feeding and desludging machine
CN109156377A (en) A kind of aerial conveyor formula feed conveyer
CN111838014A (en) Wild duck is bred and eats device with unmanned automatic feeding
CN101233829A (en) Automatic recognition quantitative feeding arrangement
CN212232570U (en) Modern beef cattle breeding farm based on standardized fattening technology
CN206674732U (en) A kind of wild boar culture hut that water function is fed with mechanical feed
CN110934078B (en) Automatic feeding device and pig house
CN203181775U (en) Automatic feeding system
CN2511129Y (en) Bait device
CN218483533U (en) Accurate feeding device
CN218789750U (en) Intelligent feeding system for livestock breeding
CN216492622U (en) Unattended intelligent cowshed
CN214339401U (en) Environment-friendly automatic feeding device for breeding chickens
CN204811445U (en) Beef rearing is with device of feeding
CN215957777U (en) Automatic feeding device for henhouse
CN209845946U (en) Automatic feeding equipment of rabbit
CN214102706U (en) A ration fodder dispensing device for live pig is bred
CN112640829A (en) Whitebait is bred with multiple spot device that spills simultaneously
CN215123260U (en) Full-automatic feeding machine of feed is bred to free-range poultry
CN204777353U (en) Automatic feed and eat device
CN113973734A (en) Multifunctional spiral pushing type cow pushing and feeding supplementing machine
CN202364661U (en) Structure of animal feeding trough
CN217958264U (en) Automatic change accurate feeding device
CN218681170U (en) Raise chickens and use manger mechanism of feeding in raw material

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20210209

Address after: 261061 No.88 Shengli East Street, Kuiwen District, Weifang City, Shandong Province

Patentee after: SHANDONG VOCATIONAL ANIMAL SCIENCE AND VETERINARY College

Address before: 261061 Dongfeng East Street, Kuiwen District, Weifang City, Shandong Province

Patentee before: Yang Jufeng

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20201229

Termination date: 20210507