A device for quantitatively injecting liquid into the center of a corn stalk by drilling holes and its usage method

Abstract

The present invention provides a device for quantitatively injecting liquid into the center of a corn stalk and its usage method, belonging to the field of corn anti-stalk rot disease experiments. It solves the problems that the existing experimental process of injecting liquid medicine for corn anti-stalk rot disease is cumbersome and has poor consistency, and cannot meet the experimental requirements. It includes that the bacterial liquid and vaseline liquid stored in the bacterial liquid storage bottle and the vaseline storage bottle are transported to the handheld part under the action of an adjustable quantitative injector. Use a hand drill to drill a hole obliquely downward at a 45° angle at the second-to-last internode of the corn stalk from the ground. Under the action of the depth-limiting positioning ring, the drilling depth reaches the middle of the corn stem pith. After drilling, insert the bacterial liquid injection head into the hole, inject 1.0 mL of the pathogen inoculum into the corn plant stem pith, and then use the vaseline injection head to overflow 0.5 mL of vaseline liquid to seal the hole position. It is mainly used for corn anti-stalk rot disease experiments.

Description

Technical Field

[0001] The present invention belongs to the field of corn anti-stem rot disease tests, and particularly relates to a device for quantitatively injecting liquid by drilling holes in the center of a corn stalk and a using method thereof. Background Art

[0002] There are many provincial, municipal and county-level scientific research units or experimental stations engaged in breeding and cultivation across the country in China, and there is a wide demand for field corn straw anti-stem rot disease test devices. However, the research on corn straw drilling and liquid injection devices in China is still blank at present. Currently in China, manual drilling (electric hand drill), manual injection of bacterial liquid (medical syringe) and fingertip application of vaseline for sealing are still widely used for tests. During the operation process, due to the different diameters of the second-to-last internodes from the ground of different corn varieties, the operators cannot adjust the drilling depth in time. At the same time, the operators' direct contact with the bacterial liquid is likely to have an adverse impact on human health. The injection volume of drilling and medicine injection and vaseline sealing cannot be accurately adjusted and controlled, resulting in incomplete sealing of the corn stalks and being easily infected by other pathogens. The manual operation efficiency is low, the drilling accuracy is not high, the labor cost is large, and it is difficult to achieve the test requirements.

[0003] At present, all kinds of existing corn stalk drilling and liquid injection tools mainly perform operations step by step manually. This method mainly uses an electric hand drill for drilling, a medical hand-pressed injector for injecting bacterial liquid and finger application of vaseline for tests. It has the advantages of being convenient to carry and having simple processes. However, the labor cost of hiring workers is relatively high. During the operation process, each plant requires the operators to operate in different procedures. At the same time, it is difficult to accurately control the injection volume, drilling depth and the amount of vaseline applied. The high breakage rate results in test failures and a large amount of wasted liquid medicine, thus leading to poor test effects and being extremely easy to pollute the environment. At the same time, during the breeding test process, the test value of each test corn plant is relatively high. Therefore, there is an urgent need in China for a drilling and liquid injection device that is convenient to operate, runs stably and reliably, is easy to repair and maintain, and can efficiently and accurately control the injection volume to complete the test of injecting liquid medicine into the base stem nodes of corn plants. Summary of the Invention

[0004] In view of this, the present invention aims to provide a device for quantitatively injecting liquid by drilling holes in the center of a corn stalk and a using method thereof, so as to solve the problems that the existing corn anti-stem rot disease injection liquid medicine test process is cumbersome, the consistency is poor, and it cannot meet the test requirements.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A device for quantitatively injecting liquid into the center of a corn stalk, which includes a liquid storage tank and a handheld component. Inside the tank body of the liquid storage tank, there are a bacterial liquid storage bottle, a vaseline storage bottle, an adjustable quantitative liquid injector, a power supply for a hand drill, a control power supply, and a controller. The upper ends of the bacterial liquid storage bottle and the vaseline storage bottle are connected to a liquid replenishment quick-insert interface through a conduit. The liquid replenishment quick-insert interface is arranged on the tank body. The lower ends of the bacterial liquid storage bottle and the vaseline storage bottle are each connected to an adjustable quantitative liquid injector through a hose. The adjustable quantitative liquid injector includes a solution chamber and a piston rod. A connected hose joint is arranged on the side wall of the solution chamber. The lower ends of the bacterial liquid storage bottle and the vaseline storage bottle are connected to the hose joint through a hose. One end of the piston rod is slidably connected to the inner wall of the solution chamber. A first spring is arranged between the boss on the piston rod and the inner end wall of the solution chamber. The other end of the piston rod is connected to an electric push rod. One end of the solution chamber is provided with a Luer connector. A check valve ball is arranged between the Luer connector and the solution chamber. A second spring is arranged between the check valve ball and the Luer connector. The Luer connectors of the two adjustable quantitative liquid injectors are respectively connected to a bacterial liquid bottle quick-insert port and a vaseline bottle quick-insert port through a liquid delivery pipe. The power supply for the hand drill is connected to a power socket through a power cord. The bacterial liquid bottle quick-insert port, the vaseline bottle quick-insert port, and the power socket are all arranged on the side wall of the tank body. The control power supply is connected to the electric push rod and the controller. The controller is connected to the electric push rod. The handheld component includes a hand drill, a bacterial liquid injection head, a vaseline injection head, and an injection head fixing frame. A depth-limiting positioning ring is arranged on the drill bit of the hand drill. The injection head fixing frame is installed on the hand drill. Inside the injection head fixing frame, there are a bacterial liquid flow channel and a vaseline flow channel. The outlet of the bacterial liquid flow channel is connected to the bacterial liquid injection head. The outlet of the vaseline flow channel is connected to the vaseline injection head. The bottom of the hand drill is connected to a base. One end of the base is connected to the inlets of the bacterial liquid flow channel and the vaseline flow channel respectively through two delivery pipes. The other end of the base is connected to a main connection line. A power plug, a vaseline bottle quick plug, and a bacterial liquid bottle quick plug are arranged on the main connection line. The power plug is connected to the power socket. The vaseline bottle quick plug is connected to the vaseline bottle quick-insert port. The bacterial liquid bottle quick plug is connected to the bacterial liquid bottle quick-insert port.

[0006] Furthermore, a power interface is arranged on the tank body, and the power interface is connected to the control power supply.

[0007] Furthermore, the liquid replenishment quick-insert interface is connected to a liquid replenishment mechanism. The liquid replenishment mechanism includes a vaseline replenishment bottle, a bacterial liquid replenishment bottle, a double-headed liquid pump, and a liquid replenishment pipe. The upper ends of the vaseline replenishment bottle and the bacterial liquid replenishment bottle are connected to the double-headed liquid pump. The two outlets of the double-headed liquid pump are respectively connected to a liquid replenishment pipe. One end of the two liquid replenishment pipes is connected to a liquid replenishment quick-insert joint. The liquid replenishment quick-insert joint is connected to the liquid replenishment quick-insert interface. The double-headed liquid pump is connected to a power joint, and the power joint is connected to the power interface.

[0008] Furthermore, the box body is connected to the box body upper cover through a box body hinge. A display screen, a power switch and an alarm are arranged on the box body upper cover. The display screen, the power switch and the alarm are respectively connected to the control power supply and the controller.

[0009] Furthermore, the outer side of the piston rod is a threaded structure, an adjusting nut is screwed on the threaded structure, a transparent cover is arranged on one side wall of the solution cavity, and scales are arranged on the solution cavity.

[0010] Furthermore, liquid level sensors are arranged on both the bacterial liquid storage bottle and the vaseline storage bottle. The liquid level sensors are connected to the controller, and a one-way valve is arranged on the liquid delivery pipe.

[0011] Furthermore, the base is connected to the bottom of the electric drill in a sliding insertion manner. A bacterial liquid channel and a vaseline channel are arranged on the base. The bacterial liquid channel and the vaseline channel are respectively connected to the inlets of the bacterial liquid flow channel and the vaseline flow channel through delivery pipes.

[0012] Furthermore, dust-proof covers are arranged on both the power interface and the liquid replenishment quick-insert interface. A double-shoulder strap and / or a handle are arranged on the box body.

[0013] Furthermore, limiting blocks are arranged at the bottom and on both sides of the bacterial liquid storage bottle and the vaseline storage bottle. Elastic pressing belts are arranged on the limiting blocks on both sides. The elastic pressing belts fix the bacterial liquid storage bottle and the vaseline storage bottle. A fixing seat is arranged on the adjustable metering injector. The fixing seat is connected to the box body through an injector fixing plate. The control power supply is connected to the box body through a fixing frame. The electric drill power supply is connected to the box body through a chute fixing plate.

[0014] The present invention also provides a using method of the corn stalk central drilling and quantitative liquid injection device, specifically: the bacterial liquid and vaseline liquid stored in the bacterial liquid storage bottle and the vaseline storage bottle are transported to the handheld part under the action of the adjustable metering injector. Use an electric drill to drill a hole obliquely downward at an angle of 45° at the second internode from the bottom of the corn stalk from the ground. Under the action of the depth-limiting positioning ring, the drilling depth reaches the middle of the corn stem pith. After drilling, insert the bacterial liquid injection head into the drilled hole, inject 1.0 mL of the pathogen inoculum into the corn plant stem pith, and then use the vaseline injection head to overflow 0.5 ml of vaseline liquid to seal the drilled hole position.

[0015] Compared with the prior art, the beneficial effects of the present invention are: aiming at the current situation of artificial step-by-step drilling at the base stem node of corn plants, uncontrollable injection amount of bacterial liquid and incomplete sealing of the hole with vaseline, the present invention provides a corn stalk central drilling and quantitative liquid injection device and its using method for an integrated field test with adjustable drilling depth for corn straws with different diameters, adjustable liquid injection amount of medicinal liquid and adjustable quantitative injection of sealing vaseline.

[0016] The present invention designs a depth-limiting positioning ring with adjustable drilling depth for corn stalks of different diameters, enabling adjustable drilling depth at the center of the corn stalk diameter, thereby improving the quality of test operations. It integrates the operations of drilling, liquid injection, and sealing, achieving the problem-solving of multi-step operations by one person, improving the test operation efficiency and reducing processes. Based on the precise synchronous control technology of the servo electric push rod, the accuracy of the liquid injection volume is improved. It realizes adjustable injection of bacterial liquid (0 - 5 ml) for continuous injection of corn plants and adjustable liquid volume of the vaseline medicine for sealing the hole mouth, avoiding environmental hazards caused by bacterial liquid overflow and vaseline seepage into the soil. There is a touch screen on the outside of the box, which can adjust the liquid volumes of the bacterial liquid and vaseline online, display the liquid level status of the bacterial liquid storage bottle and the vaseline storage bottle, and display the remaining battery power. At the same time, there are a power switch and an alarm buzzer to prompt problems such as faults and insufficient liquid levels. The device is designed simply and is easy to maintain, with a relatively low manufacturing cost, a relatively low weight for single-person backpack operation of the whole machine, and convenient control and easy operation. According to the test requirements, 1L specifications are selected for both the bacterial liquid storage bottle and the vaseline storage bottle; according to 2 ml injection per corn plant, about 500 corn plants can be completed, greatly reducing the problem of frequent manual liquid replenishment, further improving the automation level, reducing the labor intensity of manual operations, and improving the test quality and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 is a schematic structural diagram of a device for quantitative liquid injection by drilling at the center of a corn stalk according to the present invention;

[0019] Figure 2 is a schematic front view structural diagram of the liquid storage tank according to the present invention;

[0020] Figure 3 is a schematic three-dimensional internal structural diagram of the liquid storage tank according to the present invention;

[0021] Figure 4 is a schematic plan view internal structural diagram of the liquid storage tank according to the present invention;

[0022] Figure 5 is a schematic three-dimensional structural diagram of the adjustable quantitative liquid injector according to the present invention;

[0023] Figure 6 is a schematic sectional structural diagram of the adjustable quantitative liquid injector according to the present invention;

[0024] Figure 7 is a schematic structural diagram inside the liquid storage tank of the present invention;

[0025] Figure 8 Schematic three-dimensional structure diagram of the installation of the syringe head fixing bracket according to the present invention;

[0026] Figure 9 Schematic internal structure diagram of the installation of the syringe head fixing bracket according to the present invention;

[0027] Figure 10 Schematic three-dimensional structure diagram of the fluid replenishing mechanism according to the present invention;

[0028] Figure 11 Schematic plan structure diagram of the fluid replenishing mechanism according to the present invention.

[0029] In the figure:

[0030] 1 - double shoulder strap, 2 - handle, 3 - power interface, 4 - quick socket for bacterial liquid bottle, 5 - quick socket for vaseline bottle, 6 - power socket, 7 - quick plug interface for fluid replenishment, 8 - dust cover, 9 - power supply for electric drill, 10 - bacterial liquid storage bottle, 11 - vaseline storage bottle, 12 - elastic pressure band, 13 - controller, 14 - power cord, 15 - liquid delivery pipe, 16 - one-way valve, 17 - adjustable metering syringe, 18 - box hinge, 19 - syringe fixing plate, 20 - limit block, 21 - electric push rod, 22 - liquid level sensor, 23 - control power supply, 24 - display screen, 25 - power switch, 26 - alarm, 27 - box body, 28 - box body upper cover, 29 - depth limit positioning ring, 30 - bacterial liquid injection head, 31 - vaseline injection head, 32 - syringe head fixing bracket, 33 - delivery pipe, 34 - base, 35 - power plug, 36 - quick plug for vaseline bottle, 37 - quick plug for bacterial liquid bottle, 38 - quick plug joint for fluid replenishment, 39 - power joint, 40 - vaseline fluid replenishment bottle, 41 - bacterial liquid fluid replenishment bottle, 42 - double-headed liquid pump, 43 - fluid replenishment pipe, 44 - hose joint, 45 - fixing seat, 46 - first spring, 47 - adjusting nut, 48 - piston rod, 49 - threaded structure, 50 - solution chamber, 51 - second spring, 52 - Luer connector, 53 - one-way valve ball, 54 - transparent cover, 55 - fixing bracket, 56 - sliding groove fixing plate. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] See Figures 1-11Description of this embodiment: A device for quantitatively injecting liquid into the center of a corn stalk, which includes a liquid storage tank and a handheld component. Inside the box body 27 of the liquid storage tank, there are a bacterial liquid storage bottle 10, a vaseline storage bottle 11, an adjustable quantitative injector 17, a power supply for the electric drill 9, a control power supply 23, and a controller 13. The upper ends of the bacterial liquid storage bottle 10 and the vaseline storage bottle 11 are connected to a liquid replenishment quick-insert interface 7 through a conduit. The liquid replenishment quick-insert interface 7 is arranged on the box body 27. The lower ends of the bacterial liquid storage bottle 10 and the vaseline storage bottle 11 are each connected to an adjustable quantitative injector 17 through a hose. The adjustable quantitative injector 17 includes a solution chamber 50 and a piston rod 48. A connected hose joint 44 is arranged on the side wall of the solution chamber 50. The lower ends of the bacterial liquid storage bottle 10 and the vaseline storage bottle 11 are connected to the hose joint 44 through a hose. One end of the piston rod 48 is slidably connected to the inner wall of the solution chamber 50. A first spring 46 is arranged between the boss on the piston rod 48 and the inner end wall of the solution chamber 50. The other end of the piston rod 48 is connected to an electric push rod 21. One end of the solution chamber 50 is provided with a Luer connector 52. A check valve ball 53 is arranged between the Luer connector 52 and the solution chamber 50. A second spring 51 is arranged between the check valve ball 53 and the Luer connector 52. The Luer connectors 52 of the two adjustable quantitative injectors 17 are respectively connected to a bacterial liquid bottle quick-insert port 4 and a vaseline bottle quick-insert port 5 through a liquid delivery pipe 15. The power supply for the electric drill 9 is connected to a power socket 6 through a power cord 14. The bacterial liquid bottle quick-insert port 4, the vaseline bottle quick-insert port 5, and the power socket 6 are all arranged on the side wall of the box body 27. The control power supply 23 is connected to the electric push rod 21 and the controller 13. The controller 13 is connected to the electric push rod 21. The handheld component includes an electric drill, a bacterial liquid injection head 30, a vaseline injection head 31, and an injection head fixing bracket 32. A depth-limiting positioning ring 29 is arranged on the drill bit of the electric drill. The injection head fixing bracket 32 is installed on the electric drill. The injection head fixing bracket 32 internally has a bacterial liquid flow channel and a vaseline flow channel. The outlet of the bacterial liquid flow channel is connected to the bacterial liquid injection head 30. The outlet of the vaseline flow channel is connected to the vaseline injection head 31. The bottom of the electric drill is connected to a base 34. One end of the base 34 is respectively connected to the inlets of the bacterial liquid flow channel and the vaseline flow channel through two delivery pipes 33. The other end of the base 34 is connected to a total connection line. A power plug 35, a vaseline bottle quick plug 36, and a bacterial liquid bottle quick plug 37 are arranged on the total connection line. The power plug 35 is connected to the power socket 6. The vaseline bottle quick plug 36 is connected to the vaseline bottle quick-insert port 5. The bacterial liquid bottle quick plug 37 is connected to the bacterial liquid bottle quick-insert port 4.

[0033] During use, the bacterial liquid storage bottle 10 and the vaseline storage bottle 11 in the liquid storage tank store the bacterial liquid and the vaseline liquid. The bacterial liquid and the vaseline liquid stored in the bacterial liquid storage bottle 10 and the vaseline storage bottle 11 are transported under the action of the adjustable metering injector. The electric push rod 21 drives the piston rod 48 to ensure stable injection volume. The bacterial liquid and the vaseline liquid are respectively transported to the handheld part after passing through the liquid delivery pipe 15 and the total connecting line. Use a hand drill to drill a hole at a 45° angle obliquely downward at the second-to-last stem joint of the corn stalk from the ground. Under the action of the depth-limiting positioning ring 29, the drilling depth reaches the middle of the corn stem pith. After drilling, insert the bacterial liquid injection head 30 into the drilled hole, inject 1.0 mL of the pathogen inoculum into the corn plant stem pith, and then use the vaseline injection head 31 to overflow 0.5 mL of vaseline liquid to seal the drilled hole position.

[0034] This embodiment can achieve one-key operation, and can use the hand drill switch to link and control the subsequent two liquid injection actions to improve the operation efficiency. Press the hand drill switch button once, the hand drill stops drilling for 1.5 seconds after drilling for 1.5 seconds, 1 mL of the liquid medicine flows out from the bacterial liquid injection head 30, and after 1 second, 0.5 mL of vaseline liquid overflows from the vaseline injection head 31 to seal the drilled hole position. The above process and time are determined through experiments.

[0035] The hand drill uses a 6-mm diameter drill bit. During the use process, due to the smooth outer surface of the corn stalk, the drill bit positioning is inaccurate and the drill bit is prone to slipping and deviating. Therefore, a positioning drill bit with a positioning pin can be used, which is more convenient during the use process. The power socket 6 is a six-core waterproof aviation socket, and the power plug 35 is a six-core waterproof aviation plug, including 3 wires of the hand drill and 3 wires of the manual switch. The total connecting line can be a straight silicone tube or a spiral stretch spring silicone tube. Using the spiral stretch spring silicone tube can increase the operation range. Both the bacterial liquid injection head 30 and the vaseline injection head 31 include a needle part and a threaded luer head. The needle part is connected to the threaded luer head, and the threaded luer head is connected to the injection head fixing frame 32. The outlet aperture of the bacterial liquid injection head 30 is about 3.5 mm, and the liquid outlet aperture of the vaseline injection head 31 is about 6 mm.

[0036] A power interface 3 is provided on the box body 27, and the power interface 3 is connected to the control power supply 23. The voltage of the hand drill power supply 9 is 20V, and the voltage of the control power supply 23 is 24V. It can also be in the form of using one power supply and adding a voltage transformation module.

[0037] This embodiment further includes a liquid replenishment mechanism. The quick-insert liquid replenishment interface 7 is connected to the liquid replenishment mechanism. The liquid replenishment mechanism includes a vaseline liquid replenishment bottle 40, a bacterial liquid replenishment bottle 41, a double-headed liquid pump 42, and a liquid replenishment tube 43. The upper ends of the vaseline liquid replenishment bottle 40 and the bacterial liquid replenishment bottle 41 are connected to the double-headed liquid pump 42. The two outlets of the double-headed liquid pump 42 are respectively connected to a liquid replenishment tube 43. One ends of the two liquid replenishment tubes 43 are connected to a quick-insert liquid replenishment connector 38, and the quick-insert liquid replenishment connector 38 is connected to the quick-insert liquid replenishment interface 7. The double-headed liquid pump 42 is connected to a power supply connector 39, and the power supply connector 39 is connected to a power supply interface 3. The liquid replenishment mechanism is used to replenish bacterial liquid and vaseline liquid into the bacterial liquid storage bottle 10 and the vaseline storage bottle 11.

[0038] The box body 27 is connected to the box body upper cover 28 through a box body hinge 18. A display screen 24, a power switch 25, and an alarm 26 are arranged on the box body upper cover 28. The display screen 24, the power switch 25, and the alarm 26 are respectively connected to the control power supply 23 and the controller 13. The display screen 24 can be used to adjust the amounts of bacterial liquid and vaseline liquid online, display the liquid level states of the bacterial liquid storage bottle 10 and the vaseline storage bottle 11, display the remaining power of the battery, and prompt problems such as faults and insufficient liquid levels.

[0039] The outer side of the piston rod 48 is a threaded structure 49. An adjusting nut 47 is screwed on the threaded structure 49. A transparent cover 54 is arranged on one side wall of the solution chamber 50, and scales are arranged on the solution chamber 50. By rotating the adjusting nut, the position of the piston rod 48 can be adjusted, thereby adjusting the liquid output volume.

[0040] Liquid level sensors 22 are arranged on both the bacterial liquid storage bottle 10 and the vaseline storage bottle 11. The liquid level sensors 22 are connected to the controller 13. A one-way valve 16 is arranged on the liquid delivery pipe 15. The liquid delivery pipe 15 is a silicone pipe with a diameter of 6mm×4mm. The liquid level sensors 22 are connected to the bacterial liquid storage bottle 10 and the vaseline storage bottle 11 through detachable soft rubber hose clamps for liquid replenishment. The liquid level sensors 22 are probe liquid level sensors. The one-way valve 16 prevents the liquid at one end of the electric drill liquid pipe from flowing back.

[0041] The base 34 is connected to the bottom of the electric drill in a sliding and inserting manner. A bacterial liquid channel and a vaseline channel are arranged on the base 34. The bacterial liquid channel and the vaseline channel are respectively connected to the inlets of the bacterial liquid flow channel and the vaseline flow channel through a delivery pipe 33. It is convenient for connection, supplies power to the electric drill, and provides channels for bacterial liquid and vaseline.

[0042] Dust covers 8 are arranged on both the power supply interface 3 and the quick-insert liquid replenishment interface 7. A one-way valve is arranged inside the quick-insert liquid replenishment interface 7. A double-shoulder strap 1 and / or a handle 2 are arranged on the box body 27. Two wide wheels can also be added at the lower end of the box body 27 to make it drag and slide in the corn ridge furrow, thereby reducing the labor intensity of the operator for carrying out operations on the back.

[0043] Limit blocks 20 are provided at the bottom and both sides of the bacterial liquid storage bottle 10 and the vaseline storage bottle 11. Elastic pressing belts 12 are provided on the limit blocks 20 on both sides. The elastic pressing belts 12 are elastic and adhesive pressing belts. The elastic pressing belts 12 fix the bacterial liquid storage bottle 10 and the vaseline storage bottle 11. A fixing seat 45 is provided on the adjustable metering injector 17. The fixing seat 45 is connected to the box body 27 through an injector fixing plate 19. The control power supply 23 is connected to the box body 27 through a fixing frame 55. The electric drill power supply 9 is connected to the box body 27 through a chute fixing plate 56. To ensure stable connection. All the plug joints and sockets in the above embodiments are quick connectors and quick connection sockets.

[0044] Comparative analysis: For the original corn anti-stem rot test, 3 people carried out the operations step by step. In the original 3-person step-by-step operation, the drilling operation time for the first process was about 3 seconds, the time for injecting the liquid medicine using a syringe in the second process was 2 seconds. After the liquid medicine in the syringe was used up, the operator went to the portable plastic bucket to draw the liquid medicine, which took 5 seconds. The time used for the sealing process in the third process was the same as that in the second process. The interval time between the three processes was about 5 - 25 seconds. After using the corn stalk center drilling and quantitative liquid injection device of the present invention, the interval time between the above processes and the time for drawing the liquid medicine and vaseline in the second and third processes can be saved. Moreover, the liquid injection volume is controllable, and the test effect is good. It not only improves the production efficiency but also reduces the labor cost.

[0045] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and variations can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well.

Claims

1. A quantitative liquid injection device for drilling holes in the center of corn stalks, characterized in that: It includes a liquid storage tank and a handheld component. Inside the tank body (27) of the liquid storage tank, there are a bacterial liquid storage bottle (10), a vaseline storage bottle (11), an adjustable metering injector (17), a power supply for the electric drill (9), a control power supply (23), and a controller (13). The upper ends of the bacterial liquid storage bottle (10) and the vaseline storage bottle (11) are connected to a quick connector for liquid replenishment (7) through a conduit. The quick connector for liquid replenishment (7) is arranged on the tank body (27). The lower ends of the bacterial liquid storage bottle (10) and the vaseline storage bottle (11) are each connected to an adjustable metering injector (17) through a hose. The adjustable metering injector (17) includes a solution chamber (50) and a piston rod (48). A connected hose connector (44) is arranged on the side wall of the solution chamber (50). The lower ends of the bacterial liquid storage bottle (10) and the vaseline storage bottle (11) are connected to the hose connector (44) through a hose. One end of the piston rod (48) is slidably connected to the inner wall of the solution chamber (50). A first spring (46) is arranged between the boss on the piston rod (48) and the inner end wall of the solution chamber (50). The other end of the piston rod (48) is connected to an electric push rod (21). A luer connector (52) is arranged at one end of the solution chamber (50). A check valve ball (53) is arranged between the luer connector (52) and the solution chamber (50). A second spring (51) is arranged between the check valve ball (53) and the luer connector (52). The luer connectors (52) of the two adjustable metering injectors (17) are respectively connected to a quick socket for the bacterial liquid bottle (4) and a quick socket for the vaseline bottle (5) through a liquid delivery pipe (15). The power supply for the electric drill (9) is connected to a power socket (6) through a power cord (14). The quick socket for the bacterial liquid bottle (4), the quick socket for the vaseline bottle (5), and the power socket (6) are all arranged on the side wall of the tank body (27). The control power supply (23) is connected to the electric push rod (21) and the controller (13). The controller (13) is connected to the electric push rod (21). The handheld component includes an electric drill, a bacterial liquid injection head (30), a vaseline injection head (31), and an injection head fixing bracket (32). A depth limiting positioning ring (29) is arranged on the drill bit of the electric drill. The injection head fixing bracket (32) is installed on the electric drill. A bacterial liquid flow channel and a vaseline flow channel are formed inside the injection head fixing bracket (32). The outlet of the bacterial liquid flow channel is connected to the bacterial liquid injection head (30). The outlet of the vaseline flow channel is connected to the vaseline injection head (31). The bottom of the electric drill is connected to a base (34). One end of the base (34) is respectively connected to the inlets of the bacterial liquid flow channel and the vaseline flow channel through two delivery pipes (33). The other end of the base (34) is connected to a main connection line. A power plug (35), a quick plug for the vaseline bottle (36), and a quick plug for the bacterial liquid bottle (37) are arranged on the main connection line. The power plug (35) is connected to the power socket (6). The quick plug for the vaseline bottle (36) is connected to the quick socket for the vaseline bottle (5).The quick plug (37) of the bacterial liquid bottle is connected to the quick socket (4) of the bacterial liquid bottle.

2. The quantitative liquid injection device for drilling in the center of a corn stalk according to claim 1, characterized in that: A power interface (3) is provided on the box body (27), and the power interface (3) is connected to a control power supply (23).

3. The quantitative liquid injection device for drilling in the center of a corn stalk according to claim 2, characterized in that: The liquid replenishment quick-connect interface (7) is connected to a liquid replenishment mechanism. The liquid replenishment mechanism includes a vaseline liquid replenishment bottle (40), a bacterial liquid replenishment bottle (41), a double-headed liquid pump (42), and a liquid replenishment tube (43). The upper ends of the vaseline liquid replenishment bottle (40) and the bacterial liquid replenishment bottle (41) are connected to the double-headed liquid pump (42). Two outlets of the double-headed liquid pump (42) are respectively connected to a liquid replenishment tube (43). One ends of the two liquid replenishment tubes (43) are connected to a liquid replenishment quick-connect joint (38), and the liquid replenishment quick-connect joint (38) is connected to the liquid replenishment quick-connect interface (7). The double-headed liquid pump (42) is connected to a power supply joint (39), and the power supply joint (39) is connected to the power interface (3).

4. The quantitative liquid injection device for drilling holes in the center of a corn stalk according to claim 1, characterized in that: The box body (27) is connected to the box body upper cover (28) through a box body hinge (18). A display screen (24), a power switch (25), and an alarm (26) are provided on the box body upper cover (28). The display screen (24), the power switch (25), and the alarm (26) are respectively connected to the control power supply (23) and the controller (13).

5. The quantitative liquid injection device for drilling in the center of a corn stalk according to claim 1, characterized in that: The outer side of the piston rod (48) is a threaded structure (49), and an adjusting nut (47) is screwed on the threaded structure (49). A transparent cover (54) is provided on one side wall of the solution chamber (50), and scales are provided on the solution chamber (50).

6. The quantitative liquid injection device for drilling in the center of a corn stalk according to claim 1, characterized in that: Liquid level sensors (22) are provided on both the bacterial liquid storage bottle (10) and the vaseline storage bottle (11). The liquid level sensors (22) are connected to the controller (13), and a one-way valve (16) is provided on the liquid delivery pipe (15).

7. A quantitative liquid injection device for drilling in the center of a corn stalk according to claim 1, characterized in that: The base (34) is connected to the bottom of the electric drill in a sliding and inserting manner. A bacterial liquid channel and a vaseline channel are provided on the base (34). The bacterial liquid channel and the vaseline channel are respectively connected to the inlets of the bacterial liquid flow channel and the vaseline flow channel through a delivery pipe (33).

8. A quantitative liquid injection device for drilling in the center of a corn stalk according to claim 2, characterized in that: Dust covers (8) are provided on both the power interface (3) and the liquid replenishment quick-connect interface (7). A double-shoulder strap (1) and / or a handle (2) are provided on the box body (27).

9. The quantitative liquid injection device for drilling in the center of a corn stalk according to claim 1, wherein: Limit blocks (20) are provided at the bottom and on both sides of the bacterial liquid storage bottle (10) and the vaseline storage bottle (11). Elastic pressing belts (12) are provided on the limit blocks (20) on both sides. The elastic pressing belts (12) fix the bacterial liquid storage bottle (10) and the vaseline storage bottle (11). A fixing seat (45) is provided on the adjustable metering syringe (17). The fixing seat (45) is connected to the box body (27) through a syringe fixing plate (19). The control power supply (23) is connected to the box body (27) through a fixing frame (55). The electric drill power supply (9) is connected to the box body (27) through a chute fixing plate (56).

10. A method for using the corn stalk central drilling and quantitative liquid injection device according to claim 1, characterized in that: The bacterial liquid and vaseline liquid stored in the bacterial liquid storage bottle (10) and the vaseline storage bottle (11) are delivered to the handheld part under the action of an adjustable metering syringe. Use a hand drill to drill a hole obliquely downward at a 45° angle at the second-to-last internode of the corn stalk from the ground. Under the action of the depth-limiting positioning ring (29), the drilling depth reaches the middle of the corn pith. After drilling, insert the bacterial liquid injection head (30) into the drilled hole, inject 1.0 mL of the pathogen inoculum into the corn plant pith, and then use the vaseline injection head (31) to overflow 0.5 mL of vaseline liquid to seal the drilled hole position.

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