阅读说明：本技术 一种具有土壤改良功能的马尾松幼苗施肥装置及方法 (Pinus massoniana seedling fertilizing device and method with soil improvement function ) 是由 张珍明 周鑫伟 周运超 靳芙蓉 贺红早 黄先飞 张家春 于 2019-08-15 设计创作，主要内容包括：本发明涉及施肥装置技术领域,尤其是一种具有土壤改良功能的马尾松幼苗施肥装置及方法,包括支撑座,支撑座的顶部固定连接有液压伸缩机构,且液压伸缩机构的顶部固定连接有顶座,顶座的顶部固定连接有肥料放置桶,肥料放置桶的一侧连通设有连接管,肥料放置桶远离连接管的一侧上固定连接有第二驱动电机,第二驱动电机的输出端上同轴连接有第二转轴,且第二转轴远离第二驱动电机的一端延伸至连接管内,弯管的另一端连接在安装板的顶部,安装板的顶部同轴连接有第一驱动电机,第一转轴的底部同轴连接有放置桶,且放置桶的外壁上均匀分布有若干通孔。本发明可使肥料在离心力的作用下甩出至桶外进行施肥,结构简单且节省了大量的人力。(The invention relates to the technical field of fertilizer application devices, in particular to a masson pine seedling fertilizer application device with a soil improvement function and a method thereof. The invention can throw the fertilizer out of the barrel under the action of centrifugal force for fertilizing, has simple structure and saves a large amount of manpower.)

1. A masson pine seedling fertilizing device with a soil improvement function and a method thereof comprise a supporting seat (2), and are characterized in that idler wheels (1) are fixedly connected to four corners of the bottom of the supporting seat (2), a hydraulic telescopic mechanism (4) is fixedly connected to the top of the supporting seat (2), a top seat (6) is fixedly connected to the top of the hydraulic telescopic mechanism (4), the top seat (6) and the hydraulic telescopic mechanism (4) are coaxially arranged, a fertilizer placing barrel (7) is fixedly connected to the top of the top seat (6), a connecting pipe (27) is communicated with one side of the fertilizer placing barrel (7), the connecting pipe (27) and the fertilizer placing barrel (7) are obliquely arranged, a second driving motor (20) is fixedly connected to one side, away from the connecting pipe (27), of the fertilizer placing barrel (7), a second rotating shaft (23) is coaxially connected to the output end of the second driving motor (20), just in second pivot (23) keep away from the one end of second driving motor (20) and extend to connecting pipe (27), just fixedly connected with flight (22) on second pivot (23) outer wall, the one end of placing bucket (7) is kept away from in connecting pipe (27) is connected with return bend (13), the top at mounting panel (16) is connected to the other end of return bend (13), just communicate the setting between return bend (13) and mounting panel (16), the top coaxial coupling of mounting panel (16) has first driving motor (14), coaxial coupling has first pivot (19) on the output of first driving motor (14), first pivot (19) run through mounting panel (16) and set up, the bottom coaxial coupling of first pivot (19) places bucket (17), the bottom of first pivot (19) with place bucket (17) in the bottom rotate the connection, elbow pipe (13) are close the one end of mounting panel (16) and are located and place bucket (17) directly over, just evenly distributed has a plurality of through-holes (25) on the outer wall of placing bucket (17), the top of supporting seat (2) is equipped with battery (12), one side fixedly connected with handrail (9) of supporting seat (2), fixedly connected with controlling means (28) are gone up in handrail (9), first driving motor (14), second driving motor (20) and hydraulic telescoping mechanism (4) all connect through wire and controlling means (28), controlling means (28) are connected through wire and battery (12).

2. The masson pine seedling fertilizing device with the soil improvement function as claimed in claim 1, wherein the four corners of the bottom of the top seat (6) are fixedly connected with guide rods (5), the top of the supporting seat (2) is provided with sleeves (3) at corresponding positions, and one ends of the guide rods (5) far away from the top seat (6) extend into the sleeves (3) at corresponding positions.

3. the masson pine seedling fertilizing device with the soil improvement function as claimed in claim 1, wherein a positioning seat (21) is fixedly connected to the inner wall of the placing barrel (7), one end of the second driving motor (20) far away from the second rotating shaft (23) is fixedly connected to the positioning seat (21), the top of the placing barrel (7) is coaxially connected with a feeding pipe (8), the feeding pipe (8) is in a circular truncated cone shape, and the end of the feeding pipe (8) with a small radius is coaxially connected to the top of the fertilizer placing barrel (7).

4. The masson pine seedling fertilizing device with the soil improvement function as claimed in claim 1, wherein a motor box (15) is coaxially connected to the top of the mounting plate (16), the first driving motor (14) is coaxially connected in the motor box (15), a connecting cover (26) is coaxially connected to the bottom of the mounting plate (16), the connecting cover (26) is in a circular truncated cone shape, and the placing barrel (17) is located inside the connecting cover (26).

5. The masson pine seedling fertilizing device with the soil improvement function as claimed in claim 1, wherein a mounting box body (24) is fixedly connected to the top of the supporting seat (2), the storage battery (12) is fixedly connected in the mounting box body (24), a placing seat (10) is arranged above the mounting box body (24), four corners of the bottom of the placing seat (10) are vertically connected with supporting rods (11), and the bottom of the supporting rods (11) is fixedly connected to the top of the supporting seat (2).

6. A masson pine seedling fertilizing device with a soil improvement function as claimed in claim 1, characterized in that a connecting seat (18) is coaxially arranged on the bottom surface inside the placing barrel (17), and one end of the first rotating shaft (19) far away from the first driving motor (14) is screwed on the top of the connecting seat (18).

7. The use method of the masson pine seedling fertilizing device with the soil improvement function as claimed in claim 1, is characterized by comprising the following steps:

S1: the formula fertilizer comprises, by weight, 1000 parts of rosa roxburghii fermented pomace, 700 parts of low-grade phosphate rock, 300 parts of decomposed rice hull crushed powder, 50-100 parts of charcoal, 20-30 parts of purple puffball liquid strain and 10-20 parts of calcium chloride, and is prepared by uniformly mixing the components in proportion;

s2: charging a storage battery (12) connected to the top of the supporting seat (2), rotatably connecting the top of the mounting box body (24) with a sealing cover, opening the sealing cover, and connecting the storage battery with a power supply device through a lead so as to charge the storage battery (12);

S3: the handrail (9) is pushed to enable the supporting seat (2) to move, the supporting seat (2) is convenient for a user to push under the action of the roller (1), a large amount of manpower is saved, and the device is pushed to a seedling area needing fertilization;

S4: the hydraulic telescopic mechanism (4) is controlled by a switch arranged on the control device (28) to push the top seat (6) to do telescopic motion, so that the placing height of the placing barrel (17) can be adjusted, and fertilization operation can be performed after the placing height is adjusted to a proper position;

s5: the second driving motor (20) and the first driving motor (14) are controlled to rotate through the control device (28), fertilizer to be used is poured into the fertilizer placing barrel (7) through the feeding pipe (8), and the rest fertilizer and fertilizer bags can be placed at the top of the placing seat (10), so that fertilizer can be conveniently supplemented into the fertilizer placing barrel (7);

S6: promote handrail (9) and make the device remove, through pivoted second pivot (23), in helical blade (22) can accelerate to place the quick normal connecting pipe (27) that enters into of fertilizer in fertilizer placement barrel (7), the operation that the fertilizer that enters into in placement barrel (17) by connecting pipe (27) can realize spilling under the rotation effect of first driving motor (14), has not only realized quick fertilization and has saved a large amount of manpowers.

Technical Field

The invention relates to the technical field of fertilizer application devices, in particular to a pinus massoniana seedling fertilizer application device and method with a soil improvement function.

Background

pinus massoniana is a Pinaceae, Pinus arbor, the height can reach 45 meters, and the diameter at breast height is 1.5 meters; the method is characterized in that barks are reddish brown, branches are flat or obliquely spread, crowns are wide in tower shape or umbrella shape, branches grow one round each year, pinus massoniana is extremely wide in distribution, north is from south of river and south of Shandong, south of China to two Guangdong, Hunan and Taiwan, east is from coastal areas, middle of West to Sichuan and Guizhou, the branches are distributed in all parts of south of China, main materials of the south of China are tree seeds, the economic value is high, pine seedlings can meet requirements when cutting roots, the sowing time is proper and early, preferably from 2 th ten days to 3 th days, and is not more than 3 months at the latest, the sowing mode is strip sowing, the sowing ditch direction is preferably parallel to the seedbed direction, the seedlings need to be fertilized in the process of cultivation, the traditional fertilizing mode is mostly manual fertilizing, a large amount of labor force is occupied, uneven fertilization is easy to occur, and certain damage is caused to soil. Therefore, the Pinus massoniana seedling fertilizing device and method with the soil improvement function are provided in the woolen bar.

Disclosure of Invention

the invention aims to solve the defects in the prior art, and provides a pinus massoniana seedling fertilizing device and method with a soil improvement function.

In order to achieve the purpose, the invention adopts the following technical scheme:

A masson pine seedling fertilizing device with a soil improvement function and a method thereof are designed, the masson pine seedling fertilizing device comprises a supporting seat, idler wheels are fixedly connected with four corners of the bottom of the supporting seat, a hydraulic telescopic mechanism is fixedly connected with the top of the supporting seat, a top seat is fixedly connected with the top of the hydraulic telescopic mechanism, the top seat and the hydraulic telescopic mechanism are coaxially arranged, a fertilizer placing barrel is fixedly connected with the top of the top seat, one side of the fertilizer placing barrel is communicated with a connecting pipe, the connecting pipe and the fertilizer placing barrel are obliquely arranged, a second driving motor is fixedly connected with the side, away from the connecting pipe, of the fertilizer placing barrel, a second rotating shaft is coaxially connected with the output end of the second driving motor, one end, away from the second driving motor, of the second rotating shaft extends into the connecting pipe, a spiral sheet is fixedly connected with the outer wall of the second rotating shaft, one end, away from the, the other end of the elbow is connected with the top of the mounting plate, and the elbow and the mounting plate are communicated, the top of the mounting plate is coaxially connected with a first driving motor, the output end of the first driving motor is coaxially connected with a first rotating shaft, the first rotating shaft penetrates through the mounting plate, the bottom of the first rotating shaft is coaxially connected with a placing barrel, the bottom of the first rotating shaft is rotationally connected with the bottom in the placing barrel, one end of the bent pipe close to the mounting plate is positioned right above the placing barrel, a plurality of through holes are uniformly distributed on the outer wall of the placing barrel, a storage battery is arranged at the top of the supporting seat, one side of the supporting seat is fixedly connected with a handrail, a control device is fixedly connected on the handrail, the first driving motor, the second driving motor and the hydraulic telescopic mechanism are all connected with the control device through leads, and the control device is connected with the storage battery through leads.

Preferably, the equal fixedly connected with guide bar in bottom four corners of footstock, the top of supporting seat corresponds position department and all is equipped with the sleeve pipe, the one end that the footstock was kept away from to the guide bar extends to in the sleeve pipe that corresponds position department.

Preferably, place fixedly connected with positioning seat on the inner wall of bucket, the one end fixed connection that second pivot was kept away from to second driving motor is on the positioning seat, the top coaxial coupling who places the bucket has the inlet pipe, the round platform form of inlet pipe, the top of bucket is placed at fertilizer to the little one end coaxial coupling of inlet pipe radius.

Preferably, the top coaxial coupling of mounting panel has the motor box, a driving motor coaxial coupling is in the motor box, and the bottom coaxial coupling of mounting panel has the connecting cover, the connecting cover is round platform form, it is located the inside of connecting cover to place the bucket.

Preferably, the top fixedly connected with installation box body of supporting seat, battery fixed connection is in the installation box body, the top of installation box body is equipped with places the seat, the equal vertical connection in bottom four corners of placing the seat has the bracing piece, the bottom fixed connection of bracing piece is at the top of supporting seat.

Preferably, a connecting seat is coaxially arranged on the bottom surface inside the placing barrel, and one end of the first rotating shaft, which is far away from the first driving motor, is connected to the top of the connecting seat in a threaded manner.

The invention also provides a using method of the masson pine seedling fertilizing device with the soil improvement function, which comprises the following steps:

s1: the formula fertilizer comprises, by weight, 1000 parts of rosa roxburghii fermented pomace, 700 parts of low-grade phosphate rock, 300 parts of decomposed rice hull crushed powder, 50-100 parts of biochar, 20-30 parts of purple puffball liquid strain and 10-20 parts of calcium chloride, and is prepared by uniformly mixing the components in proportion;

s2: charging the storage battery connected to the top of the supporting seat, rotatably connecting the top of the mounting box body with a sealing cover, opening the sealing cover, and connecting the storage battery with a power supply device through a lead so as to charge the storage battery;

s3: the handrail is pushed to enable the supporting seat to move, the supporting seat is convenient for a user to push under the action of the rolling wheels, a large amount of manpower is saved, and the device is pushed to a seedling area needing fertilization;

s4: the hydraulic telescopic mechanism is controlled by a switch arranged on the control device to push the top seat to perform telescopic motion, so that the placing height of the placing barrel can be adjusted, and fertilization operation can be performed after the placing height of the placing barrel is adjusted to a proper position;

S5: the second driving motor and the first driving motor are controlled to rotate through the control device again, fertilizer to be used is poured into the fertilizer placing barrel through the feeding pipe, and the rest fertilizer and the fertilizer bag can be placed at the top of the placing seat, so that fertilizer can be conveniently supplemented in the fertilizer placing barrel;

S6: promote the handrail and make the device remove, can accelerate to place in fertilizer places the quick normal the entering into connecting pipe of fertilizer in the bucket through pivoted second pivot, flight, enter into the operation that can realize spilling under first driving motor's the rotation effect by the connecting pipe and place fertilizer in the bucket, not only realized quick fertilization and saved a large amount of manpowers.

the masson pine seedling fertilizing device and method with the soil improvement function, provided by the invention, have the beneficial effects that: the placing barrel can realize stable rotation through the rotation of the first driving motor, the rotating speed of the first driving motor is set to be a reasonable value, fertilizer in the placing barrel can be thrown out of the barrel under the action of centrifugal force, further the fertilizer application is quickly carried out, meanwhile, the placed height of the top seat can be adjusted through the arranged hydraulic telescopic mechanism, seedlings with different heights can be conveniently fertilized, the structure is simple and easy to operate, a large amount of manpower is saved, uniform fertilizer application is realized, and meanwhile, the soil is protected.

Specifically, a storage battery connected to the top of a supporting seat is charged, the top of an installation box body is rotatably connected with a sealing cover, the sealing cover is opened, the storage battery is connected with a power supply device through a lead, the storage battery can be charged, the handrail is pushed to enable the supporting seat to move, the supporting seat is convenient for a user to push under the action of a roller, a large amount of manpower is saved, the device is pushed to a seedling area needing fertilization, a switch control hydraulic telescopic mechanism arranged on a control device is used for pushing a top seat to perform telescopic motion, the height of a placing barrel can be adjusted, fertilization operation can be performed after the device is adjusted to a proper position, a second driving motor and a first driving motor are controlled to rotate through the control device again, and fertilizer needing to be used is poured into the fertilizer placing barrel through an inlet pipe, surplus fertilizer and fertilizer bag can be placed at the top of placing the seat, conveniently place the barrel to fertilizer and carry out the replenishment of fertilizer, promote the handrail and make the device remove, through the pivoted second pivot, the flight can accelerate to place in fertilizer places the quick normal entering into the connecting pipe of fertilizer in the barrel, enter into by the connecting pipe and place the fertilizer in the barrel and can realize the operation of spilling under driving motor's rotation effect, not only realized quick fertilization and saved a large amount of manpowers.

(1) Under the combined action of the guide rod and the sleeve, the top seat can stably slide up and down, so that the adjustment can be normally performed.

(2) the feeding pipe prevents fertilizer particles from splashing when the fertilizer is placed.

(3) the fertilizer can not splash in an emission manner due to the arrangement of the connecting cover, the normal operation of fertilization is ensured, and the waste of the fertilizer is avoided.

(4) The placing seat is arranged to provide great convenience for placing the fertilizer bag.

(5) Threaded connection's setting has made things convenient for first pivot and has placed installation and dismantlement between the bucket, provides very big facility for placing the inside clearance of bucket.

Drawings

Fig. 1 is a schematic structural diagram of a pinus massoniana seedling fertilizing device with a soil improvement function provided by the invention.

Fig. 2 is a partial sectional view of a pinus massoniana seedling fertilizing device with a soil improvement function, which is provided by the invention.

In the figure: roller 1, supporting seat 2, sleeve pipe 3, hydraulic telescoping mechanism 4, guide bar 5, footstock 6, fertilizer placing barrel 7, inlet pipe 8, handrail 9, placing seat 10, bracing piece 11, battery 12, return bend 13, first driving motor 14, motor box 15, mounting panel 16, placing barrel 17, connecting seat 18, first pivot 19, second driving motor 20, positioning seat 21, flight 22, second pivot 23, installation box body 24, through-hole 25, connecting cover 26, connecting pipe 27, controlling means 28.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

referring to fig. 1-2, a masson pine seedling fertilizer injection unit with soil improvement function, including supporting seat 2, the bottom four corners fixedly connected with gyro wheel 1 of supporting seat 2 has made things convenient for the user to the promotion of device under gyro wheel 1's roll effect, and then has saved a large amount of manpowers.

Top fixedly connected with hydraulic telescoping mechanism 4 of supporting seat 2, and the top fixedly connected with footstock 6 of hydraulic telescoping mechanism 4, and footstock 6 and the coaxial setting of hydraulic telescoping mechanism 4, bucket 7 is placed to the top fixedly connected with fertilizer of footstock 6, one side intercommunication that bucket 7 was placed to fertilizer is equipped with connecting pipe 27, connecting pipe 27 and the slope setting of bucket 7 is placed to fertilizer, the setting of slope does benefit to the quick removal of fertilizer that bucket 7 is inside is placed to fertilizer to connecting pipe 27 in, and then the quick going on of fertilization that accelerates, and the effectual emergence that has prevented that fertilizer from causing the jam in connecting pipe 27.

A second driving motor 20 is fixedly connected to one side of the fertilizer placing barrel 7 far away from the connecting pipe 27, a second rotating shaft 23 is coaxially connected to the output end of the second driving motor 20, one end of the second rotating shaft 23 far away from the second driving motor 20 extends into the connecting pipe 27, a spiral sheet 22 is fixedly connected to the outer wall of the second rotating shaft 23, one end of the connecting pipe 27 far away from the placing barrel 7 is connected with a bent pipe 13, the other end of the bent pipe 13 is connected to the top of the mounting plate 16, the bent pipe 13 and the mounting plate 16 are communicated, the top of the mounting plate 16 is coaxially connected with a first driving motor 14, a first rotating shaft 19 is coaxially connected to the output end of the first driving motor 14, the first rotating shaft 19 penetrates through the mounting plate 16, a placing barrel 17 is coaxially connected to the bottom of the first rotating shaft 19, the bottom of the first rotating shaft 19 is rotatably connected to the bottom inside the placing barrel 17, one end of the bent, and place evenly distributed on the outer wall of bucket 17 and have a plurality of through-holes 25, place bucket 17 and can realize the rotation of inside fertilizer under the rotation effect of first driving motor 14, fertilizer granule can remove out through-hole 25 and place bucket 17 under the effect of centrifugal force, and then has realized evenly fertilized effect, has not only guaranteed the normal growth of seedling, and has played fine guard action to soil.

The top of supporting seat 2 is equipped with battery 12, one side fixedly connected with handrail 9 of supporting seat 2, fixedly connected with controlling means 28 on handrail 9, first driving motor 14, second driving motor 20 and hydraulic telescoping mechanism 4 all connect through wire and controlling means 28, and controlling means 28 connects through wire and battery 12, and the handrail 9 of setting has made things convenient for the user to promote the device wholly, has saved very big manpower.

The placing barrel 17 provided by the invention can realize stable rotation through the rotation of the first driving motor 14, the rotating speed of the first driving motor 14 is set to a reasonable value, so that the fertilizer in the placing barrel 17 can be thrown out of the barrel under the action of centrifugal force, the rapid fertilization can be further realized, meanwhile, the arranged hydraulic telescopic mechanism 4 can adjust the placing height of the top seat 6, so that seedlings with different heights can be conveniently fertilized, the structure is simple and easy to operate, a large amount of manpower is saved, uniform fertilization is realized, and meanwhile, the soil is protected.

Referring to fig. 1 and 2, further, the four corners of the bottom of the top seat 6 are fixedly connected with guide rods 5, the top of the supporting seat 2 is provided with sleeves 3 at corresponding positions, and one ends of the guide rods 5, which are far away from the top seat 6, extend into the sleeves 3 at corresponding positions.

Under the combined action of the guide rod 5 and the sleeve 3, the top seat 6 can be stably slid up and down, so that the adjustment can be normally carried out.

Referring to fig. 2, further, a positioning seat 21 is fixedly connected to the inner wall of the placing barrel 7, one end of the second driving motor 20, which is far away from the second rotating shaft 23, is fixedly connected to the positioning seat 21, a feeding pipe 8 is coaxially connected to the top of the placing barrel 7, the feeding pipe 8 is in a circular truncated cone shape, and one end of the feeding pipe 8, which has a small radius, is coaxially connected to the top of the fertilizer placing barrel 7.

The feeding pipe 8 prevents the fertilizer particles from splashing when the fertilizer is placed.

Referring to fig. 1 and 2, further, the top of the mounting plate 16 is coaxially connected with the motor box 15, the first driving motor 14 is coaxially connected in the motor box 15, the bottom of the mounting plate 16 is coaxially connected with the connecting cover 26, the connecting cover 26 is in a circular truncated cone shape, and the placing barrel 17 is located inside the connecting cover 26.

the arrangement of the connecting cover 26 ensures that the fertilizer cannot splash in a transmitting manner, ensures the normal operation of fertilization and avoids the waste of the fertilizer.

referring to fig. 1 and 2, further, a mounting box 24 is fixedly connected to the top of the supporting seat 2, the storage battery 12 is fixedly connected to the inside of the mounting box 24, the placing seat 10 is arranged above the mounting box 24, the supporting rods 11 are vertically connected to four corners of the bottom of the placing seat 10, and the bottom of the supporting rods 11 is fixedly connected to the top of the supporting seat 2.

The placing seat 10 is arranged to provide great convenience for placing the fertilizer bags.

Referring to fig. 2, a connecting seat 18 is coaxially disposed on the bottom surface of the inside of the placing barrel 17, and an end of the first rotating shaft 19 remote from the first driving motor 14 is screwed on the top of the connecting seat 18.

threaded connection's setting has made things convenient for first pivot 19 and has placed installation and dismantlement between the bucket 17, provides very big facility for placing the inside clearance of bucket 17.

The invention also provides a using method of the masson pine seedling fertilizing device with the soil improvement function, which comprises the following steps:

S1: the formula fertilizer comprises, by weight, 1000 parts of rosa roxburghii fermented pomace, 700 parts of low-grade phosphate rock, 300 parts of decomposed rice hull crushed powder, 50-100 parts of biochar, 20-30 parts of purple puffball liquid strain and 10-20 parts of calcium chloride, and is prepared by uniformly mixing the components in proportion;

S2: charging the storage battery 12 connected to the top of the support seat 2, rotatably connecting the top of the mounting box body 24 with a sealing cover, opening the sealing cover, and connecting the storage battery with a power supply device through a lead so as to charge the storage battery 12;

S3: the handrail 9 is pushed to enable the supporting seat 2 to move, the supporting seat 2 is convenient for a user to push under the action of the roller 1, a large amount of manpower is saved, and the device is pushed to a seedling area needing fertilization;

s4: the hydraulic telescopic mechanism 4 is controlled by a switch arranged on the control device 28 to push the top seat 6 to perform telescopic motion, so that the placing height of the placing barrel 17 can be adjusted, and fertilization operation can be performed after the placing height is adjusted to a proper position;

S5: the second driving motor 20 and the first driving motor 14 are controlled to rotate through the control device 28 again, fertilizer to be used is poured into the fertilizer placing barrel 7 through the feeding pipe 8, and the rest fertilizer and fertilizer bags can be placed at the top of the placing seat 10, so that fertilizer can be conveniently supplemented into the fertilizer placing barrel 7;

S6: promote handrail 9 and make the device remove, can accelerate to place in the quick normal connecting pipe 27 that enters into of fertilizer in barrel 7 is placed to fertilizer through pivoted second pivot 23, flight 22, enter into by connecting pipe 27 and place the operation that fertilizer in the bucket 17 can realize spilling under the rotation effect of first driving motor 14, not only realized quick fertilization and saved a large amount of manpowers.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.