Quantitative liquid injection device for center drilling of corn stalks and use method of quantitative liquid injection device

Abstract

The invention provides a corn stalk center drilling quantitative liquid injection device and a use method thereof, and belongs to the field of corn stalk rot resistance tests. The problems that an existing corn stem rot resistance injection liquid medicine test is tedious in procedure and poor in consistency, and the test requirement cannot be met are solved. The method comprises the steps that bacterial liquid and vaseline liquid stored in a bacterial liquid storage bottle and a vaseline liquid storage bottle are conveyed to a handheld part under the action of an adjustable quantitative liquid injector, an electric hand drill is used for drilling obliquely and downwards at the penultimate diameter section of the corn stalk from the ground at an angle of 45 degrees, the drilling depth reaches the middle of the corn stalk pith under the action of a depth-limiting positioning ring, and after drilling is completed, the corn stalk pith is drilled. The method comprises the following steps: inserting a bacteria liquid injection head into a drill hole, injecting 1.0 mL of bacteria inoculum into stem pith of a corn plant, and then blocking the position of the drill hole by using 0.5 mL of vaseline liquid overflowing from a vaseline injection head. The device is mainly used for corn stem rot resistance tests.

Description

Technical Field

[0001] The invention belongs to the field of corn stalk rot resistance test, and particularly relates to a corn stalk center drilling quantitative liquid injection device and a use method thereof. Background Art

[0002] There are many provincial, municipal and county-level scientific research units or test stations engaged in breeding and cultivation in various parts of my country. There is a wide demand for field corn stalk anti-stalk rot test equipment, but the research on corn stalk drilling and injection equipment in my country is still blank. At present, the domestic method of manual drilling (electric hand drill), manual injection of bacterial solution (medical syringe) and fingertip smearing of vaseline for sealing is still widely used for testing. During the operation, the operator cannot adjust the drilling depth in time because the diameter of the second to last diameter of different corn varieties from the ground is different. At the same time, direct contact with the bacterial solution by the operator can easily have adverse effects on human health. The injection volume of drilling and injection and vaseline sealing cannot be accurately adjusted and controlled, resulting in incomplete sealing of corn stalks and easy infection by other pathogens. The manual operation efficiency is low, the drilling accuracy is not high, and the manpower consumption is large, making it difficult for the test results to meet the test requirements.

[0003] At present, various corn stalk drilling and injection tools that have been used are mainly manual step-by-step operations. This method mainly uses hand-held electric drills to drill holes, medical hand-pressure injection devices to inject bacterial liquid, and fingers to apply vaseline for test operations. It has the advantages of being easy to carry and simple procedures, but the labor cost is high. During the operation, each plant needs to be operated by operators in different procedures. At the same time, the injection amount, drilling depth, and amount of vaseline applied are difficult to control accurately. The high breakage rate causes the test to fail and the liquid is wasted a lot, resulting in poor test results and easy environmental pollution. At the same time, because the test value of each test corn plant is high during the breeding test, there is an urgent need for a drilling and injection device that is easy to operate, stable and reliable, easy to repair and maintain, and can efficiently and accurately control the injection amount to complete the test of injecting liquid at the base of the corn plant. Summary of the invention

[0004] In view of this, the present invention aims to propose a corn stalk center drilling quantitative liquid injection device and a method of using the same, so as to solve the problems that the existing corn stalk rot resistance injection test process is cumbersome, has poor consistency, and cannot meet the test requirements.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a corn stalk center drilling quantitative liquid injection device, which includes a liquid storage box and a handheld component, wherein the liquid storage box is provided with a bacterial liquid storage bottle, a vaseline liquid storage bottle, an adjustable quantitative liquid injector, a hand drill power supply, a control power supply and a controller, the upper ends of the bacterial liquid storage bottle and the vaseline liquid storage bottle are connected to a liquid replenishment quick plug interface through a conduit, and the liquid replenishment quick plug interface is arranged on the box body, and the lower ends of the bacterial liquid storage bottle and the vaseline liquid storage bottle are respectively connected to an adjustable quantitative liquid injector through a hose, and the adjustable quantitative liquid injector includes A solution chamber and a piston rod, a connecting hose connector is arranged on the side wall of the solution chamber, the lower ends of the bacterial solution storage bottle and the vaseline storage bottle are connected to the hose connector 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 the electric push rod, a Luer connector is arranged at one end of the solution chamber, a one-way valve ball is arranged between the Luer connector and the solution chamber, a second spring is arranged between the one-way valve ball and the Luer connector, and the Luer connectors of the two adjustable quantitative injectors are respectively The hand drill power supply is connected to the quick socket of the bacteria liquid bottle and the quick socket of the vaseline bottle through a liquid delivery tube, and the power supply of the hand drill is connected to the power socket through a power cord. The quick socket of the bacteria liquid bottle, the quick socket of the vaseline bottle and the power socket are all arranged on the side wall of the box body. The control power supply is connected to the electric push rod and the controller, and the controller is connected to the electric push rod. The handheld component includes a hand drill, a bacteria liquid injection head, a vaseline injection head and an injection head fixing frame. A limited depth positioning ring is arranged on the drill head of the hand drill, and the injection head fixing frame is installed on the hand drill. A bacteria liquid flow hole is provided inside the injection head fixing frame. The bacterial liquid flow channel and the vaseline flow channel are connected, the outlet of the vaseline flow channel is connected to the vaseline injection head, the bottom of the hand drill is connected to the base, one end of the base is respectively connected to the inlets of the bacterial liquid flow channel and the vaseline flow channel through two delivery pipes, the other end of the base is connected to the main connecting line, the main connecting line is provided with a power plug, a vaseline bottle quick plug and a bacterial liquid bottle quick plug, the power plug is connected to the power socket, the vaseline bottle quick plug is connected to the vaseline bottle quick socket, and the bacterial liquid bottle quick plug is connected to the bacterial liquid bottle quick socket.

[0006] Furthermore, the box body is provided with a power interface, and the power interface is connected to the control power supply.

[0007] Furthermore, the rehydration quick-plug interface is connected to the rehydration mechanism, and the rehydration mechanism includes a vaseline rehydration bottle, a bacterial liquid rehydration bottle, a double-head liquid pump and a rehydration tube. The upper ends of the vaseline rehydration bottle and the bacterial liquid rehydration bottle are connected to the double-head liquid pump, and the two outlets of the double-head liquid pump are respectively connected to a rehydration tube, one end of the two rehydration tubes is connected to the rehydration quick-plug connector, the rehydration quick-plug connector is connected to the rehydration quick-plug interface, the double-head liquid pump is connected to the power connector, and the power connector is connected to the power interface.

[0008] Furthermore, the box body is connected to the box body cover through a box body hinge, and a display screen, a power switch and an alarm are arranged on the box body cover, and 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 threaded on the threaded structure, a transparent cover is provided on one side wall of the solution chamber, and a scale is provided on the solution chamber.

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

[0011] Furthermore, the base is connected to the bottom of the hand drill in a sliding manner, and a bacterial liquid channel and a vaseline channel are provided 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 a delivery pipe.

[0012] Furthermore, the power interface and the liquid replenishment quick plug interface are both provided with dust covers, and the box body is provided with a shoulder strap and / or a handle.

[0013] Furthermore, the bottom and both sides of the bacterial liquid storage bottle and the vaseline storage bottle are provided with limit blocks, and the limit blocks on both sides are provided with elastic pressure belts, and the elastic pressure belts fix the bacterial liquid storage bottle and the vaseline storage bottle. The adjustable quantitative injector is provided with a fixing seat, and the fixing seat is connected to the box through the injector fixing plate, the control power supply is connected to the box through the fixing frame, and the hand drill power supply is connected to the box through the slide fixing plate.

[0014] The present invention also provides a method for using a quantitative injection device for drilling a hole in the center of a corn stalk, specifically: the bacterial solution and vaseline liquid stored in the bacterial solution storage bottle and the vaseline storage bottle are transported to a handheld component under the action of an adjustable quantitative injection device, a hand-held electric drill is used to drill a hole obliquely downward at an angle of 45° at the second-to-last diametral node of the corn stalk from the ground, and the drilling depth reaches the middle of the corn stem pith under the action of a depth limiting positioning ring. After drilling, a bacterial solution injection head is inserted into the drilled hole, 1.0 mL of pathogen inoculum is injected into the pith of the corn plant, and then 0.5 ml of vaseline liquid is overflowed from the vaseline injection head to seal the drilled hole.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: in response to the current status of artificial step-by-step drilling of the stem nodes at the base of corn plants, uncontrollable amount of injected bacterial solution and incomplete sealing of the holes with vaseline, the present invention provides a corn stalk center drilling quantitative injection device and a method of using the same, which is used for an integrated field test with adjustable depth drilling, adjustable injection amount and adjustable injection sealing vaseline for corn stalks of different diameters.

[0016] The present invention designs a depth-limiting positioning ring with adjustable drilling depth for corn stalks of different diameters, so as to achieve adjustable drilling depth at the center of the corn stalk diameter, thereby improving the quality of the test operation. The drilling, injection and sealing operations are integrated, so that one person can solve the problem of multiple people working in steps, improve the test operation efficiency and reduce the number of processes. Based on the precise synchronous control technology of the servo electric push rod, the accuracy of the injection amount is improved. The corn plant is continuously injected (0-5ml) with adjustable injection bacteria liquid volume and injection vaseline liquid sealing orifice liquid volume, so as to avoid environmental hazards caused by bacterial liquid overflow and vaseline infiltration into the soil. A touch screen is provided on the outside of the box body, which can adjust the bacterial liquid and vaseline liquid volume 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, a power switch and an alarm buzzer are provided to prompt problems such as faults and insufficient liquid levels. The device is simple in design and easy to maintain, with relatively low manufacturing cost, low weight for single-person operation, and convenient and easy control and operation. According to the test requirements, the bacterial liquid storage bottle and the vaseline storage bottle are both selected to be 1L in size; by injecting 2 ml per corn plant, about 500 corn plants can be completed, which greatly reduces the problem of frequent manual liquid replenishment, further improves the level of automation, reduces the labor intensity of manual operations, and improves the quality and effect of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary 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 accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a device for quantitatively injecting liquid into the center of a corn stalk according to the present invention;

[0019] Figure 2 This is a schematic diagram of the front structure of the liquid storage tank of the present invention;

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

[0021] Figure 4 It is a schematic diagram of the internal planar structure of the liquid storage tank of the present invention;

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

[0023] Figure 6 It is a schematic cross-sectional structure diagram of the adjustable quantitative liquid injector of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure inside the liquid storage box of the present invention;

[0025] Figure 8 This is a schematic diagram of the three-dimensional structure of the injection head fixing frame installed in the present invention;

[0026] Fig. 9 This is a schematic diagram of the internal structure of the injection head fixing frame of the present invention;

[0027] Fig.10 It is a schematic diagram of the three-dimensional structure of the fluid replenishing mechanism of the present invention;

[0028] Fig.11 It is a schematic diagram of the planar structure of the fluid replenishing mechanism described in the present invention.

[0029] In the figure:

[0030] 1- Shoulder strap, 2- Handle, 3- Power interface, 4- Quick-plug for bacterial liquid bottle, 5- Quick-plug for vaseline bottle, 6- Power socket, 7- Quick-plug for liquid replenishment, 8- Dust cover, 9- Power supply for electric drill, 10- Bacteria liquid storage bottle, 11- Vaseline storage bottle, 12- Elastic pressure belt, 13- Controller, 14- Power cord, 15- Liquid delivery tube, 16- One-way valve, 17- Adjustable quantitative liquid injection device, 18- Box folding, 19- Liquid injection device 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, 28- Box cover, 29- Depth limit Position ring, 30-bacteria liquid injection head, 31-Vaseline injection head, 32-injection head fixing frame, 33-delivery pipe, 34-base, 35-power plug, 36-Vaseline bottle quick plug, 37-bacteria liquid bottle quick plug, 38-liquid replenishment quick plug connector, 39-power connector, 40-Vaseline replenishment bottle, 41-bacteria liquid replenishment bottle, 42-double-head liquid pump, 43-liquid replenishment tube, 44-hose connector, 45-fixed 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-fixed frame, 56-slide fixing plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0032] See also Figure 1-11The present embodiment is described, a device for quantitatively injecting liquid in the center of a corn stalk through drilling, comprising a liquid storage box and a handheld component, wherein a bacterial liquid storage bottle 10, a vaseline liquid storage bottle 11, an adjustable quantitative liquid injector 17, a hand drill power supply 9, a control power supply 23 and a controller 13 are arranged in the box body 27 of the liquid storage box, wherein the upper ends of the bacterial liquid storage bottle 10 and the vaseline liquid storage bottle 11 are connected to a liquid replenishment quick plug interface 7 through a conduit, and the liquid replenishment quick plug interface 7 is arranged on the box body 27, and the lower ends of the bacterial liquid storage bottle 10 and the vaseline liquid storage bottle 11 are respectively connected to an adjustable quantitative liquid injector 17 through a hose, and the adjustable quantitative liquid injector 17 comprises a solution chamber 50 and a piston rod 48, and the solution A communicating hose connector 44 is provided on the side wall of the liquid 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 provided 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 the electric push rod 21. A Luer connector 52 is provided at one end of the solution chamber 50. A one-way valve ball 53 is provided between the Luer connector 52 and the solution chamber 50. A second spring 51 is provided between the one-way valve ball 53 and the Luer connector 52. The Luer connectors 52 of the two adjustable quantitative injectors 17 are respectively The hand drill power supply 9 is connected to the power socket 6 through the power line 14. The quick socket 4 of the bacteria liquid bottle, the quick socket 5 of the vaseline bottle 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 a hand drill, a bacteria liquid injection head 30, a vaseline injection head 31 and an injection head fixing frame 32. A limited depth positioning ring 29 is arranged on the drill head of the hand drill. The injection head fixing frame 32 is installed on the hand drill. The injection head fixing frame 32 has an internal opening. 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 30, the outlet of the vaseline flow channel is connected to the vaseline injection head 31, the bottom of the hand drill is connected to the base 34, one end of the base 34 is respectively connected to the inlet 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 the main connecting line, and the main connecting line is provided with a power plug 35, a vaseline bottle quick plug 36 and a bacterial liquid bottle quick plug 37, the power plug 35 is connected to the power socket 6, the vaseline bottle quick plug 36 is connected to the vaseline bottle quick socket 5, and the bacterial liquid bottle quick plug 37 is connected to the bacterial liquid bottle quick socket 4.

[0033] When in use, the bacterial liquid storage bottle 10 and the vaseline storage bottle 11 in the liquid storage box store bacterial liquid and vaseline liquid, and the bacterial liquid and vaseline liquid stored in the bacterial liquid storage bottle 10 and the vaseline storage bottle 11 are transported under the action of the adjustable quantitative liquid injector, and the electric push rod 21 drives the piston rod 48 to ensure the stability of the injection volume. The bacterial liquid and vaseline liquid are respectively transported to the handheld component through the liquid delivery pipe 15 and the main connecting line. A hand drill is used to drill a hole at an angle of 45° downward at the second to last diameter node 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, the bacterial liquid injection head 30 is inserted into the drilled hole, and 1.0 mL of the pathogen inoculum is injected into the stem pith of the corn plant. Then, the vaseline injection head 31 is used to overflow 0.5 ml of vaseline liquid to seal the drilled hole.

[0034] This embodiment can realize one-button operation, and can use the hand drill switch to control the subsequent two injection actions in linkage, thereby improving the operation efficiency. By pressing the hand drill switch button once, the hand drill drills for 1.5 seconds and then stops for 1.5 seconds. The bacterial liquid injection head 30 flows out 1 ml of liquid, and after another second, the vaseline injection head 31 overflows 0.5 ml of vaseline liquid to block the drilling hole. The above process and time are determined through experiments.

[0035] The hand drill uses a 6mm diameter drill bit. During use, the drill bit is not accurately positioned due to the smooth outer surface of the corn stalk, and the drill bit is easy to slip and deviate. Therefore, a positioning drill bit with a positioning pin can be used, which is more convenient during use. 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 main connecting line can be a straight silicone tube or a spiral stretch spring silicone tube. The use of a spiral stretch spring silicone tube can increase the operating range. The bacterial liquid injection head 30 and the vaseline injection head 31 both include a needle part and a screw thread Luer head, the needle part is connected to the screw thread Luer head, and the screw thread Luer head is connected to the injection head fixing frame 32. The outlet aperture of the bacterial liquid injection head 30 is about 3.5mm, and the outlet aperture of the vaseline injection head 31 is about 6mm.

[0036] The box 27 is provided with a power interface 3, which is connected to the control power supply 23. The hand drill power supply 9 has a voltage of 20V, and the control power supply 23 has a voltage of 24V. A power supply can also be used with a transformer module.

[0037] This embodiment also includes a liquid replenishment mechanism, the liquid replenishment quick plug 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-head 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-head liquid pump 42, the two outlets of the double-head liquid pump 42 are respectively connected to a liquid replenishment tube 43, one end of the two liquid replenishment tubes 43 is connected to the liquid replenishment quick plug connector 38, the liquid replenishment quick plug connector 38 is connected to the liquid replenishment quick plug interface 7, the double-head liquid pump 42 is connected to the power supply connector 39, and the power supply connector 39 is connected to the power supply interface 3. The bacterial liquid and vaseline liquid are replenished in the bacterial liquid storage bottle 10 and the vaseline storage bottle 11 through the liquid replenishment mechanism.

[0038] The box body 27 is connected to the box body upper cover 28 through the box body hinge 18, and the box body upper cover 28 is provided with a display screen 24, a power switch 25 and an alarm 26, and 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 adjust the amount of bacterial liquid and vaseline liquid online, display the liquid level status 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 level.

[0039] The outer side of the piston rod 48 is a threaded structure 49, and an adjusting nut 47 is screwed onto the threaded structure 49. A transparent cover 54 is provided on one side wall of the solution chamber 50, and a scale is provided on the solution chamber 50. The position of the piston rod 48 can be adjusted by rotating the adjusting nut, thereby adjusting the liquid output.

[0040] The bacterial liquid storage bottle 10 and the vaseline storage bottle 11 are both provided with a liquid level sensor 22, which is connected to the controller 13. The liquid delivery pipe 15 is provided with a one-way valve 16, and the liquid delivery pipe 15 is a silicone tube with a diameter of 6 mm×4 mm. The liquid level sensor 22 is connected to the bacterial liquid storage bottle 10 and the vaseline storage bottle 11 through a pluggable soft rubber hose clamp for liquid replenishment. The liquid level sensor 22 is a probe liquid level sensor, and the one-way valve 16 prevents liquid from flowing back at one end of the hand drill liquid pipe.

[0041] The base 34 is connected to the bottom of the hand drill in a sliding manner, and a bacterial liquid channel and a vaseline channel are provided on the base 34, and the bacterial liquid channel and the vaseline channel are respectively connected to the inlet of the bacterial liquid flow channel and the vaseline flow channel through the delivery pipe 33. It is convenient to connect, power the hand drill and provide a channel for the bacterial liquid and vaseline.

[0042] The power interface 3 and the quick-plug interface 7 are both provided with dust covers 8, and a one-way valve is provided in the quick-plug interface 7. The box body 27 is provided with a shoulder strap 1 and / or a handle 2. Two wide wheels can also be added to the lower end of the box body 27 so that it can be dragged and slid in the corn furrow, thereby reducing the labor intensity of the operator's carrying operation.

[0043] The bottom and both sides of the bacterial liquid storage bottle 10 and the vaseline storage bottle 11 are provided with limit blocks 20, and the limit blocks 20 on both sides are provided with elastic pressure belts 12, and the elastic pressure belts 12 are elastic and adhesive pressure belts, and the elastic pressure belts 12 fix the bacterial liquid storage bottle 10 and the vaseline storage bottle 11, and the adjustable quantitative injection device 17 is provided with a fixing seat 45, and the fixing seat 45 is connected to the box 27 through the injection device fixing plate 19, and the control power supply 23 is connected to the box 27 through the fixing bracket 55, and the hand drill power supply 9 is connected to the box 27 through the slide fixing plate 56. Ensure stable connection. All the plug connectors and plug interfaces in the above embodiments are quick connectors and quick-connect interfaces.

[0044] Comparative analysis: the original corn stem rot resistance test was performed by 3 people in a step-by-step manner. The original 3 people performed the work in a step-by-step manner. The first process of drilling holes took about 3 seconds, the second process of injecting liquid medicine with a syringe took 2 seconds, and after the liquid medicine in the syringe was used up, the operator went to the portable plastic bucket to extract the liquid medicine for 5 seconds. The time taken for the sealing process in the third process was the same as that in the second process, and the interval time between the three processes was about 5-25 seconds. After using the corn stalk center drilling quantitative injection device of the present invention, the interval time between the above processes and the time for extracting liquid medicine and vaseline in the second and third processes can be saved, and the injection amount is controllable, the test effect is good, not only the production efficiency is improved, but also the labor cost is reduced.

[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 implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A device for quantitative liquid injection through central drilling of corn stalks, characterized in that: It comprises a liquid storage box and a handheld component. A bacterial liquid storage bottle (10), a vaseline liquid storage bottle (11), an adjustable quantitative liquid injector (17), a hand drill power supply (9), a control power supply (23) and a controller (13) are arranged in the box body (27) of the liquid storage box. The upper ends of the bacterial liquid storage bottle (10) and the vaseline liquid storage bottle (11) are connected to a liquid replenishment quick plug interface (7) through a conduit. The liquid replenishment quick plug interface (7) is arranged on the box body (27). The lower ends of the bacterial liquid storage bottle (10) and the vaseline liquid storage bottle (11) are respectively connected to an adjustable quantitative liquid injector (17) through a hose. The adjustable quantitative liquid injector (17) comprises a solution chamber (50) and a piston rod (48). The side wall of the solution chamber (50) is provided with a connecting A hose connector (44), 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 the electric push rod (21), one end of the solution chamber (50) is provided with a Luer connector (52), a one-way valve ball (53) is arranged between the Luer connector (52) and the solution chamber (50), a second spring (51) is arranged between the one-way valve ball (53) and the Luer connector (52), and the two Luer connectors ( 52) are respectively connected to the quick socket (4) of the bacterial liquid bottle and the quick socket (5) of the vaseline bottle through a liquid delivery tube (15); the hand drill power supply (9) is connected to the power socket (6) through a power line (14); the quick socket (4) of the bacterial liquid bottle, the quick socket (5) of the vaseline bottle 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 comprises a hand drill, a bacterial liquid injection head (30), a vaseline injection head (31) and an injection head fixing frame (32); a limited depth positioning ring (29) is arranged on the drill head of the hand drill; the injection head fixing frame (32) is installed on the drill head of the hand drill On the hand drill, the injection head fixing frame (32) is provided with a bacterial liquid flow channel and a vaseline flow channel, the bacterial liquid flow channel outlet is connected to the bacterial liquid injection head (30), the vaseline flow channel outlet is connected to the vaseline injection head (31), the bottom of the hand drill is connected to the base (34), one end of the base (34) is respectively connected to the inlet 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 the main connecting line, the main connecting line is provided with a power plug (35), a vaseline bottle quick plug (36) and a bacterial liquid bottle quick plug (37), the power plug (35) is connected to the power socket (6), the vaseline bottle quick plug (36) is connected to the vaseline bottle quick socket (5),The bacteria liquid bottle quick plug (37) is connected to the bacteria liquid bottle quick socket (4).

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

3. A corn stalk center drilling quantitative liquid injection device according to claim 2, characterized in that: The rehydration quick-plug interface (7) is connected to a rehydration mechanism, and the rehydration mechanism comprises a vaseline rehydration bottle (40), a bacterial liquid rehydration bottle (41), a double-headed liquid pump (42) and a rehydration tube (43). The upper ends of the vaseline rehydration bottle (40) and the bacterial liquid rehydration 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 rehydration tube (43). One end of the two rehydration tubes (43) is connected to a rehydration quick-plug connector (38). The rehydration quick-plug connector (38) is connected to the rehydration quick-plug interface (7). The double-headed liquid pump (42) is connected to a power connector (39), and the power connector (39) is connected to the power interface (3).

4. A device for quantitative liquid injection through central drilling of corn stalks 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 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).

5. A device for quantitative liquid injection through central drilling of corn stalks 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 threadedly connected to the threaded structure (49). A transparent cover (54) is provided on one side wall of the solution chamber (50), and a scale is provided on the solution chamber (50).

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

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

8. The device for quantitative liquid injection through central drilling of corn stalks according to claim 2, characterized in that: The power interface (3) and the liquid replenishment quick plug interface (7) are both provided with dust covers (8), and the box body (27) is provided with a shoulder strap (1) and / or a handle (2).

9. The device for quantitatively injecting liquid into the center hole of corn stalk according to claim 1, characterized in that: The bottom and both sides of the bacterial liquid storage bottle (10) and the vaseline storage bottle (11) are provided with limit blocks (20), and the limit blocks (20) on both sides are provided with elastic pressure belts (12), and the elastic pressure belts (12) fix the bacterial liquid storage bottle (10) and the vaseline storage bottle (11). The adjustable quantitative liquid injector (17) is provided with a fixing seat (45), and the fixing seat (45) is connected to the box (27) through the liquid injector fixing plate (19). The control power supply (23) is connected to the box (27) through the fixing frame (55), and the hand drill power supply (9) is connected to the box (27) through the slide groove fixing plate (56).

10. A method for using the corn stalk center drilling quantitative liquid injection device as claimed in claim 1, characterized in that: The bacterial liquid and vaseline liquid stored in the bacterial liquid storage bottle (10) and the vaseline liquid storage bottle (11) are transported to the handheld component under the action of an adjustable quantitative liquid injector, and a hand drill is used to drill a hole obliquely downward at an angle of 45° at the second to last diametrical node of the corn stalk from the ground. Under the action of a depth limiting positioning ring (29), the drilling depth reaches the middle of the corn stem pith. After drilling, a bacterial liquid injection head (30) is inserted into the drilled hole, and 1.0 mL of pathogen inoculum is injected into the stem pith of the corn plant. Then, a vaseline injection head (31) is used to overflow 0.5 ml of vaseline liquid to seal the drilled hole.

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