Device for trunk injection control of forestry boring dry-wood pests

Abstract

The application discloses a tree trunk injection prevention and control device for forestry dry wood boring pests and belongs to the technical field of forest protection. The device comprises a drilling machine, a drill rod, a collecting unit and an injection unit. The core improvement lies in that an elastic expansion unit is arranged on the mounting sleeve of the drill rod, and the unit comprises an elastic arc-shaped plate with a second liquid outlet hole. The device has two working states: in the drilling state, the elastic arc-shaped plate is retracted to form a drilling residue discharge channel, and the negative pressure system of the collecting unit is matched to realize synchronous drilling and residue discharge, effectively preventing the drill bit from being stuck; in the liquid injection state, the elastic arc-shaped plate is reciprocally deformed through the driving of the cam plate and the linkage structure of the injection unit, so that the residual drilling residue in the second liquid outlet hole is actively cleaned, the channel is ensured to be unobstructed, and then precise liquid injection is carried out. The application solves the problems in the prior art that drilling residue easily blocks the liquid outlet hole, residue discharge is not smooth, drilling efficiency and depth are affected, and the injection dose is not precise, and realizes integrated operation of efficient drilling, complete residue cleaning and precise injection.

Description

Technical Field

[0001] This invention belongs to the field of forest protection technology and relates to a trunk injection control device for forest trunk borers. Background Technology

[0002] In the field of forestry trunk borer control, trunk injection devices need to simultaneously achieve efficient drilling, cleaning of drilling debris, and precise injection of pesticides.

[0003] Prior art: such as patent CN117378415A, a punching and injecting device for agricultural pest and disease control, includes a base, with rollers at the four corners of the bottom of the base, and the rollers are rotatably connected to the bottom of the base via connecting rods. A support plate is provided on the upper right side of the base. It also includes: a liquid storage tank is fixed on the left side of the upper surface of the base, and a liquid filling port is opened on the right side of the top of the liquid storage tank. A hydraulic cylinder is fixed on the right side of the upper surface of the base, and a slider is fixed at the output end of the hydraulic cylinder, and the slider is slidably connected to the upper surface of the base.

[0004] Although the aforementioned existing technologies simplify the operation by integrating drilling and injection functions, they still have the following limitations.

[0005] Firstly, while the sawdust collection system uses a fan to create negative pressure for adsorption, fine sawdust can easily remain in the borehole or injection channel during drilling, potentially clogging the injection hole. During drilling, the drill bit continuously cuts wood fibers, generating a large amount of waste chips. These chips must be promptly removed through the annular space between the drill rod and the borehole wall, i.e., the chip removal channel. If the chips cannot be removed in time, they will accumulate at the bottom of the hole and in the chip removal channel. Accumulated chips significantly increase the resistance to drill bit movement, requiring a greater axial feed force to maintain drilling progress. Simultaneously, significant friction occurs between the drill rod and the dense chips, and between the chips and the borehole wall, causing a sharp increase in rotational resistance torque. This forces an increase in the load on the drilling rig motor, not only increasing energy consumption but also potentially causing the low-power motor to overload and stall, the drill bit to jam, and in extreme cases, damage to the transmission mechanism or breakage of the drill rod.

[0006] Secondly, the device lacks an active cleaning mechanism for residual drill cuttings during the injection process, and the injection channel is easily blocked by drill cuttings during drilling, affecting the subsequent injection process.

[0007] To address the aforementioned problems, this invention proposes a trunk injection control device for forestry trunk borers. Summary of the Invention

[0008] To address the problems existing in the background art, the present invention proposes a trunk injection control device for forestry trunk borers.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a trunk injection control device for forestry trunk borers, comprising a drill and a drill rod driven by the drill, and further comprising: a collection unit disposed between the drill and the drill rod;

[0010] An injection unit is connected between the collection unit and the drill pipe;

[0011] The injection unit includes a storage shell, a drive plate, an injection tube, and a connecting cylinder. The connecting cylinder has a first liquid outlet hole, and a cam plate is fixed at the end of the connecting cylinder away from the drilling rig.

[0012] The drill rod includes a drill rod sleeve, a drill bit, and an installation sleeve arranged coaxially, which are fixedly connected in a detachable manner; the installation sleeve is provided with an elastic telescopic unit, which includes an elastic arc plate, and the elastic arc plate has a second liquid outlet hole.

[0013] The mounting sleeve has a first circular plate and a second circular plate fixed inside. The side of the first circular plate away from the drilling rig forms a mounting cavity with the mounting sleeve. The cam plate and the linkage structure are disposed in the mounting cavity.

[0014] The linkage structure includes a second connecting rod, a first connecting rod, two third cylindrical gears, and a rack; the second connecting rod is slidably engaged with a cam groove on the cam plate via a connecting shaft; the first connecting rod passes through a sliding groove on the first circular plate and is connected to the elastic arc plate; the rack is fixed on the second connecting rod and meshes with the two third cylindrical gears.

[0015] The elastic telescopic unit also includes two rollers, with the two ends of the elastic arc plate fixed to the two rollers respectively. The rollers are rotatably connected to the first circular plate through bearings, and the third cylindrical gear is coaxially fixed to the rollers.

[0016] The device has two operating states:

[0017] Drilling state: The elastic arc plate is retracted, and the mounting sleeve and the elastic telescopic unit form the inlet of the discharge channel;

[0018] Liquid injection state: including cleaning stage and injection stage. In the cleaning stage, the cam plate of the injection unit drives the elastic arc plate to reciprocate through the linkage structure to clean the second liquid outlet. In the injection stage, the first liquid outlet and the second liquid outlet of the injection unit are connected to inject liquid, and the elastic arc plate remains in the retracted state.

[0019] Preferably, the collection unit includes a collection shell and fan blades.

[0020] The fan blades are connected to the drive shaft of the drilling rig via a first drive structure;

[0021] The first drive structure includes a first cylindrical gear and a second cylindrical gear that mesh with each other.

[0022] The first cylindrical gear is fixed coaxially with the drive shaft, and the second cylindrical gear is fixed coaxially with the fan blade's rotating shaft.

[0023] The second cylindrical gear has fewer teeth than the first cylindrical gear.

[0024] Preferably, the drive plate is circumferentially positioned by a positioning pin engaging with a positioning hole on the collection shell, and is driven by a keyway engaging with a rectangular key on the drill rod sleeve. The drive plate is axially fixed by a threaded sleeve.

[0025] Preferably, an elastic rubber sheet is embedded in the sliding groove of the first circular plate, and the first connecting rod is fixedly connected to the elastic rubber sheet.

[0026] Preferably, the discharge channel is formed by the space between the inner wall of the drill pipe sleeve and the outer wall of the injection pipe.

[0027] Preferably, the second circular plate is provided with a waste residue groove, and during drilling, the drill residue enters the discharge channel through the waste residue groove.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. By setting up a reciprocating deformation mechanism of an elastic arc plate driven by a linkage structure and a cam plate, the active cleaning of the second liquid outlet hole is realized, which fundamentally eliminates the dosage deviation caused by blockage and provides the primary guarantee for accurate dosage.

[0030] The device features a dedicated cleaning stage before injection. A cam plate drives a flexible arc-shaped plate through high-frequency deformation, causing the second liquid orifice to undergo repeated twisting and opening, generating strong shearing force. This effectively breaks up and removes sawdust residue from the drilling and crystals from the dried liquid. This process ensures that the second liquid orifice is completely open at the start of injection, allowing unobstructed liquid flow. Compared to traditional devices prone to unstable flow or even complete interruption due to partial blockage, this eliminates the problem of insufficient dosage or injection failure caused by obstructed channels, laying a solid foundation for precise dosage.

[0031] 2. By setting an annular internal slag discharge channel between the drill pipe sleeve and the injection pipe, and connecting it with the negative pressure system of the collection unit, drilling and slag discharge are carried out simultaneously, which greatly improves drilling efficiency and deep hole processing capability.

[0032] Through the annular channel inside the drill pipe, while the drill bit is cutting, the negative pressure generated by the fan blades inside the collection shell draws the drill cuttings from the installation slot, through the waste slag trough into the annular channel, and finally continuously pumped into the collection shell at the rear. This design allows for continuous removal of drill cuttings without interrupting drilling operations, avoiding problems such as drill bit jamming and increased torque caused by poor cuttings removal. It is particularly suitable for forestry operations that require drilling deep holes, significantly improving the efficiency and success rate of a single operation.

[0033] 3. The closed design of the internal slag discharge channel ensures a clean and safe working environment and fundamentally prepares ideal conditions for subsequent liquid injection.

[0034] This design confines all drilling cuttings within a closed piping system, completely solving the industry-wide problem of sawdust scattering everywhere. This not only protects the health of operators, preventing eye injuries from inhaled dust and debris and maintaining a clean work area, but more importantly, it prevents cross-contamination between trees by sawdust that may carry pathogens. Crucially, the internal cuttings removal leaves a clean, intact borehole after drilling. This clean channel ensures that during the fluid injection phase, the outer wall of the flexible arc plate perfectly conforms to the smooth borehole wall, forming a reliable seal, thus laying a solid foundation for subsequent precise and leak-free fluid injection. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0036] Figure 2 This is a schematic diagram of the exploded structure of the present invention;

[0037] Figure 3 This is a schematic diagram of the main cross-sectional structure of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of the collection unit of the present invention;

[0039] Figure 5 This is a cross-sectional structural diagram of the collection unit of the present invention;

[0040] Figure 6 This is a schematic diagram of the connection between the injection unit and the elastic telescopic unit of the present invention;

[0041] Figure 7 This is an exploded structural diagram of the drill rod, injection unit, and elastic telescopic unit of the present invention;

[0042] Figure 8 This is a schematic diagram of the linkage structure of the injection unit of the present invention;

[0043] Figure 9This is a schematic diagram of the connection between the elastic telescopic unit and the mounting sleeve of the present invention;

[0044] Figure 10 This is a schematic diagram of the injection unit of the present invention;

[0045] Figure 11 This is a cross-sectional structural diagram of the injection unit of the present invention;

[0046] Figure 12 This is a schematic diagram of the structure of the elastic telescopic unit of the present invention;

[0047] Figure 13 This is a schematic diagram of the inward retraction of the elastic arc-shaped sheet of the present invention;

[0048] Figure 14 This is a schematic diagram of the convex structure of the elastic arc-shaped sheet of the present invention;

[0049] Figure 15 This is a schematic diagram of the structure of the elastic sleeve abutting against the hole after the drill rod of the present invention has been drilled.

[0050] In the diagram: 1. Drill rig; 11. Motor; 2. Drill rod; 21. Drill rod sleeve; 211. Rectangular key; 212. Threaded sleeve; 213. Elastic sleeve; 22. Drill bit; 23. Mounting sleeve; 231. Mounting groove; 232. First circular plate; 2321. Sliding groove; 2322. Elastic rubber sheet; 233. Second circular plate; 2331. Waste slag trough; 3. Drive shaft; 4. Collection unit; 41. Connecting cover; 411. Cleaning plug; 42. First connecting plate; 43. First rotating shaft; 44. First connecting pipe; 45. Collection shell; 451. First drive structure; 4511. First cylindrical gear; 4512. Second cylindrical gear; 45 13. Fan blade; 46. Positioning hole; 5. Injection unit; 51. Storage shell; 511. Injection port; 52. Drive plate; 521. Positioning pin; 522. Spring; 523. Keyway; 53. Injection pipe; 531. Second connecting pipe; 54. Connecting cylinder; 541. First outlet hole; 55. Cam plate; 551. Relief groove; 552. Cam groove; 6. Elastic telescopic unit; 61. Roller; 611. Second rotating shaft; 62. Elastic arc plate; 621. Second outlet hole; 622. First connecting rod; 63. Linkage structure; 631. Third cylindrical gear; 632. Second connecting rod; 633. Rack; 634. Connecting shaft. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] The following is in conjunction with the appendix Figures 1 to 15 This invention provides a detailed description of the specific implementation of the tree trunk injection control device for forestry trunk borers, enabling those skilled in the art to fully reproduce the device's structure, assembly, and workflow.

[0053] This invention relates to a trunk injection device for controlling forest trunk borers, the core components of which include: a drill rig 1, a drill rod 2, a collection unit 4, an injection unit 5, and an elastic telescopic unit 6. The drill rig 1 provides power support, and the drill rod 2 is used to drill holes in the tree trunk. The collection unit 4 is located between the drill rig 1 and the drill rod 2 to collect drilling debris generated during drilling. The injection unit 5 is connected between the collection unit 4 and the drill rod 2 to deliver and control the injection solution. The elastic telescopic unit 6 is mounted on the drill rod 2 and is a key functional component for removing drilling debris and cleaning the borehole.

[0054] like Figure 1 and Figure 2 As shown, the drill pipe 2 includes a drill pipe sleeve 21, a mounting sleeve 23, and a drill bit 22, which are coaxially and fixedly connected. The elastic telescopic unit 6 is specifically installed on the mounting sleeve 23, which is located between the drill pipe sleeve 21 and the drill bit 22. The core component of the elastic telescopic unit 6 is an elastic arc-shaped plate 62, which is made of a highly elastic material and can deform under external force.

[0055] To accommodate subsequent injection requirements, a second liquid outlet 621 penetrating the plate body is provided in the middle of the elastic arc plate 62, and its diameter is matched with the injection flow rate. The second liquid outlet 621 can adjust its shape and diameter synchronously with the deformation of the elastic arc plate 62, thereby effectively removing residual drill cuttings in the hole before injection, improving the injection effect and the unobstructed flow of the channel.

[0056] Specifically, the device has two operating states: drilling state and liquid injection state.

[0057] In the drilling state, the elastic arc plate 62 retracts to form a drainage channel.

[0058] In the liquid injection state, there are two phases: a cleaning phase and an injection phase. During the cleaning phase, the injection unit 5 drives the elastic arc plate 62 to reciprocate and deform to clean the second liquid outlet 621. During the injection phase, the injection unit 5 communicates with the second liquid outlet 621 to inject liquid, at which time the elastic arc plate 62 remains in a retracted state.

[0059] A motor 11 is fixedly mounted on the outside of the drilling rig 1 by bolts. The output shaft of the motor 11 protrudes away from the drilling rig 1, and the end of the output shaft is coaxially fixedly connected to one end of the drive shaft 3 by a flat key.

[0060] When motor 11 starts, it can directly drive drive shaft 3 to rotate around its own axis, thereby transmitting power to subsequent components.

[0061] like Figures 3 to 5 As shown, the collection unit 4 is installed on the outer side of the end of the drive shaft 3 away from the motor 11. The collection unit 4 mainly includes a collection shell 45, a connecting cover 41, a first connecting plate 42, a first rotating shaft 43, and a first drive structure 451.

[0062] On the outer side wall of the end of the drive shaft 3 away from the motor 11, a plurality of first connecting plates 42 are fixed radially. The plurality of first connecting plates 42 are evenly distributed along the circumference of the drive shaft 3, and the end of the first connecting plate 42 away from the drive shaft 3 is fixedly connected to the inner side wall of the collection shell 45. This connection method enables the collection shell 45 to rotate around the axis of the drive shaft 3 synchronously through the first connecting plates 42 when the drive shaft 3 rotates.

[0063] A removable cleaning plug 411 is provided at the end of the collection shell 45 away from the drilling rig 1 (the cleaning plug 411 is not marked in the figure). The cleaning plug 411 is connected to the side wall of the collection shell 45 by a snap or thread seal and is used to clean the drill cuttings and impurities remaining inside the collection shell 45 periodically or as needed.

[0064] The connecting cover 41 is rotatably installed on the end opening of the collection shell 45 near the drilling rig 1 via a bearing. The central hole of the connecting cover 41 is rotatably connected to the outer wall of the drive shaft 3 through a clearance fit. The edge of the connecting cover 41 is sealed to the edge of the opening of the collection shell 45 by a sealing ring, thereby forming a closed cavity inside the collection shell 45 to achieve negative pressure slag collection.

[0065] A first rotating shaft 43 is rotatably mounted on the side of the drilling rig 1 near the collecting unit 4 via a bearing seat. The axis of the first rotating shaft 43 is parallel to the axis of the drive shaft 3. A first connecting pipe 44 is fixed to the side of the connecting cover 41 away from the collecting shell 45. The internal channel of the first connecting pipe 44 communicates with the inner cavity of the collecting shell 45. The first connecting pipe 44 is coaxially rotatable with the first rotating shaft 43.

[0066] The first drive structure 451 is installed between the drive shaft 3 and the first rotating shaft 43.

[0067] The first drive structure 451 includes a first cylindrical gear 4511, a second cylindrical gear 4512, and a fan blade 4513.

[0068] The end of the first rotating shaft 43 away from the drill rig 1 passes through the end wall of the first connecting pipe 44 and extends into the internal channel of the first connecting pipe 44. A fan blade 4513 is coaxially fixed to the end of the first rotating shaft 43 located inside the first connecting pipe 44. A second cylindrical gear 4512 is coaxially fixed to the outer wall of the end of the first rotating shaft 43 closest to the drill rig 1. A first cylindrical gear 4511 is coaxially fixed to the outer wall of the end of the drive shaft 3 closest to the drill rig 1. The first cylindrical gear 4511 and the second cylindrical gear 4512 mesh with each other. The number of teeth of the second cylindrical gear 4512 is less than the number of teeth of the first cylindrical gear 4511. Multiple ventilation ports communicating with the outside are provided on the side wall of the first connecting pipe 44 to facilitate airflow exchange when the fan blade 4513 rotates.

[0069] like Figure 3 , Figure 4 , Figure 10 and Figure 11 As shown, the injection unit 5 is located between the collection unit 4 and the drill rod 2, and is used to inject the preventive medicine. The injection unit 5 mainly includes a storage shell 51, a drive rotating plate 52, an injection tube 53, and a connecting cylinder 54.

[0070] The storage shell 51 is a cylindrical hollow cavity used to hold the pesticide solution. Its side wall has an injection port 511; before operation, the outlet pipe of an external injection pump can be quickly connected to this port to pump the pesticide into the cavity. The injection pump is existing technology, and its structure is not detailed. The end of the storage shell 51 closest to the drill rod 2 is rotatably engaged with the outer wall of the drill rod sleeve 21 via a deep groove ball bearing, allowing the storage shell 51 to rotate freely around the axis of the drill rod sleeve 21.

[0071] The drive plate 52 is located on the side of the storage housing 51 away from the drill pipe 2. The center hole of the drive plate 52 is clearance-fitted with the outer wall of the drill pipe sleeve 21, allowing the drive plate 52 to slide along the axis of the drill pipe sleeve 21. The inner sidewall of the drive plate 52 is provided with an axially extending keyway 523, which slides in engagement with a rectangular key 211 fixed on the outer wall of the drill pipe sleeve 21. This structure allows the drive plate 52 to slide axially along the keyway 523 and rotate synchronously with the drill pipe sleeve 21.

[0072] The injection pipe 53 is inserted inside the drill pipe sleeve 21. An annular gap is left between the outer wall of the injection pipe 53 and the inner wall of the drill pipe sleeve 21, which forms a drilling cuttings discharge channel.

[0073] A second connecting tube 531 is radially fixed at one end of the injection tube 53 near the storage shell 51. The end of the second connecting tube 531 away from the injection tube 53 is fixed to the inner wall of the storage shell 51, and the internal channel of the second connecting tube 531 is connected to the inner cavity of the storage shell 51 and the internal channel of the injection tube 53, so that the medicine in the storage shell 51 can flow into the injection tube 53.

[0074] The connecting cylinder 54 is coaxially fixed to the end of the injection tube 53 away from the storage shell 51. The connecting cylinder 54 has a hollow structure, and its internal channel is connected to the internal channel of the injection tube 53. Multiple first liquid outlet holes 541 are provided on the side wall of the connecting cylinder 54. The first liquid outlet holes 541 penetrate the side wall of the connecting cylinder 54 so that the medicine can flow out from the connecting cylinder 54.

[0075] Multiple positioning pins 521 are evenly fixed circumferentially on the side of the drive rotating plate 52 near the storage shell 51, with the axis of the positioning pins 521 arranged parallel to the axis of the drive rotating plate 52. The other end of the positioning pin 521 passes through the storage shell 51 and slides in engagement with it. A spring 522 is fitted onto the portion of each positioning pin 521 located between the storage shell 51 and the drive rotating plate 52. The two ends of the spring 522 are fixedly connected to the side walls of the storage shell 51 and the drive rotating plate 52, respectively, and the spring 522 continuously applies a spring force toward the collection shell 45 to the drive rotating plate 52.

[0076] The end face of the collecting shell 45 away from the drilling rig 1 has multiple positioning holes 46 that are adapted to the positioning pins 521. Under the action of the spring 522, the positioning pins 521 can be inserted into the positioning holes 46 to achieve circumferential positioning between the injection unit 5 and the collecting unit 4.

[0077] Two sets of positioning holes 46 can be provided, with the number in each set being the same and corresponding to the number of positioning pins 521. When a positioning pin 521 is inserted into one set of positioning holes 46, the first liquid outlet 541 and the second liquid outlet 621 are offset in the circumferential direction. When a positioning pin 521 is inserted into the other set of positioning holes 46, the first liquid outlet 541 and the second liquid outlet 621 are opposite each other in the circumferential direction.

[0078] The drill pipe sleeve 21 has an external thread on its outer wall on the side of the drive rotating plate 52 away from the storage shell 51, and a threaded sleeve 212 is threadedly connected to it. The end of the threaded sleeve 212 closest to the drive rotating plate 52 is rotatably connected to the plate, and the two can rotate relative to each other via a bearing. When the threaded sleeve 212 rotates and moves axially along the drill pipe sleeve 21, it drives the drive rotating plate 52 to move axially synchronously via the bearing.

[0079] Alternatively, the threaded sleeve 212 and the drive rotating plate 52 can be connected in the following way: an annular protrusion is provided on the inner circular surface of the threaded sleeve 212, and an annular groove is provided on the corresponding outer circular surface of the drive rotating plate 52, so that the protrusion is embedded in the groove and forms a mating structure that can rotate relative to each other. In this case, the rotation and axial movement of the threaded sleeve 212 can be transmitted to the drive rotating plate 52 through this protrusion-groove structure, thereby realizing its axial movement.

[0080] A tapered elastic sleeve 213 is fixedly installed at one end of the threaded sleeve 212 near the drill bit 22; the diameter of the elastic sleeve 213 at the end near the threaded sleeve 212 is larger than the diameter at the end near the threaded sleeve 212. The tapered elastic sleeve 213 is in diameter fit with the drill bit 22.

[0081] As the threaded sleeve 212 is tightened to the side closest to the drilling rig 1, its axial movement drives the drive rotating plate 52 to move synchronously, causing the locating pin 521 to abut tightly against the bottom of the locating hole 46. At this time, the threaded sleeve 212 and the locating hole 46 together limit the axial position of the drive rotating plate 52, ensuring a stable and reliable connection.

[0082] When the injection unit 5 needs to rotate independently, the operator can reverse the screw thread sleeve 212 to move it axially away from the drill rig 1. At this time, the drive plate 52 continues to move outward under the action of the spring 522, and the locating pin 521 disengages from the locating hole 46. Simultaneously, the keyway 523 slides out of the rectangular key 211 axially, completely disengaging the key connection between the drive plate 52 and the drill rod sleeve 21. Thus, the rotational constraint between the drill rod 2 and the drive plate 52 is completely released, and the injection unit 5 can rotate freely.

[0083] As the threaded sleeve 212 moves away from the drill rig 1, the elastic sleeve 213 gradually enters the drilled hole. In this way, the drill rod 2 remains stable under the friction of the elastic sleeve 213 and the hole in the tree trunk. The injection unit 5 can rotate independently and freely around the axis of the drill rod sleeve 21. The conical elastic sleeve 213 tightly seals the drill hole opening on the tree trunk, effectively preventing the injection solution from leaking out of the opening during subsequent injection, ensuring injection pressure and efficiency.

[0084] After rotating to the target angle, tighten the threaded sleeve 212 again, causing it to move the elastic sleeve 213 away from the hole, without moving out of the hole. At the same time, the threaded sleeve 212 pushes the drive plate 52 to move axially inward: the keyway 523 engages with the rectangular key 211 again, and the positioning pin 521 is simultaneously inserted into the corresponding positioning hole 46 to achieve circumferential positioning, ensuring that the injection unit 5 and the collection unit 4 are firmly connected and enter the working state.

[0085] It is important to note that during the drilling stage, the elastic sleeve 213 must be kept away from the hole opening to avoid interfering with the drilling process. As the threaded sleeve 212 is gradually tightened and approaches the drilling rig 1, its axial movement drives the drive rotating plate 52 to move forward synchronously, causing the locating pin 521 to abut tightly against the bottom of the locating hole 46. At this time, the threaded sleeve 212 and the locating hole 46 together form an axial limit on the drive rotating plate 52, ensuring a stable and reliable connection structure.

[0086] After drilling is completed, the cleaning stage begins. The threaded sleeve 212 is reverse-screwed, moving it axially away from the drill rig 1. During this process, the drive plate 52 continues to move outward under the action of the spring 522, causing the locating pin 521 to disengage from the locating hole 46. Simultaneously, the keyway 523 slides out of the rectangular key 211 axially, completely disengaging the key connection between the drive plate 52 and the drill rod sleeve 21. At this point, the rotational constraint between the drill rod 2 and the drive plate 52 is completely released, allowing the injection unit 5 to rotate freely around the drill rod axis.

[0087] As the threaded sleeve 212 continues to move away from the drill rig 1, the elastic sleeve 213 gradually enters the drilled hole. Under the friction between the elastic sleeve 213 and the hole wall, the drill rod 2 remains stable and does not rotate, while the injection unit 5 can rotate independently relative to the drill rod sleeve 21, achieving flexible adjustment.

[0088] During the injection stage, the conical elastic sleeve 213 is slightly disengaged from the hole by screwing the threaded sleeve 212, keeping the locating pin 521 in a non-contact state with the bottom of the locating hole 46, while the keyway 523 and the rectangular key 211 are connected. At this time, the elastic sleeve 213 still seals the drill hole opening in the trunk, restricting the circumferential rotation of the drill rod 2, thereby ensuring that the first liquid outlet 541 and the second liquid outlet 621 remain aligned. This design effectively seals the opening to prevent liquid leakage and avoids misalignment of the liquid outlets caused by the rotation of the drill rod 2, ensuring stable pressure and injection efficiency during the injection process.

[0089] like Figure 7 As shown, a first circular plate 232 and a second circular plate 233, parallel to each other, are fixed on the side wall of the mounting sleeve 23. Both the first circular plate 232 and the second circular plate 233 are coaxial with the mounting sleeve 23, with the first circular plate 232 located closer to the drill bit 22 and the second circular plate 233 located closer to the drill pipe sleeve 21. Two symmetrically distributed mounting grooves 231 are formed on the side wall of the mounting sleeve 23 between the first circular plate 232 and the second circular plate 233. The mounting grooves 231 penetrate the side wall of the mounting sleeve 23, providing an inlet for drill cuttings to enter the discharge channel. Multiple waste cutting grooves 2331 are formed on the surface of the second circular plate 233. The waste cutting grooves 2331 penetrate the surface of the second circular plate 233 and correspond to the positions of the mounting grooves 231, allowing drill cuttings to enter the annular gap between the drill pipe sleeve 21 and the injection pipe 53 through the waste cutting grooves 2331.

[0090] like Figures 8 to 12As shown, two sets of elastic telescopic units 6 are symmetrically arranged in the annular cavity between the connecting cylinder 54 and the mounting sleeve 23, corresponding one-to-one with the two mounting slots 231. Each set of units 6 consists of an elastic arc plate 62 and two rollers 61: the axes of the two rollers 61 are parallel to the axis of the mounting sleeve 23, and are rotatably supported between the first circular plate 232 and the second circular plate 233 by a bracket; the two ends of the elastic arc plate 62 are respectively fixed to the outer wall of the corresponding roller 61, and the rotation of the roller 61 can pull the elastic arc plate 62 to produce controllable elastic deformation.

[0091] The roller 61 is covered with an elastic layer such as rubber and maintains tangential contact with the inner wall of the connecting cylinder 54 to form a line seal, ensuring that the liquid medicine cannot leak from the cut during the injection process.

[0092] To drive the deformation of the elastic arc plate 62, a linkage structure 63 is installed on the side of the first circular plate 232 near the drill bit 22. The linkage structure 63 includes two third cylindrical gears 631, a first connecting rod 622, a second connecting rod 632, a rack 633, and a connecting shaft 634.

[0093] Two third cylindrical gears 631 correspond one-to-one with two rollers 61, and the third cylindrical gears 631 are coaxially fixed with the rotating shaft of the rollers 61, so that the third cylindrical gears 631 can rotate synchronously with the rollers 61. A first connecting rod 622 is fixed at the middle of the end of the elastic arc plate 62 away from the drilling rig 1. The first connecting rod 622 is arranged radially along the mounting sleeve 23 and passes through the surface of the first circular plate 232. A sliding groove 2321 adapted to the first connecting rod 622 is opened on the first circular plate 232. The sliding groove 2321 extends radially along the first circular plate 232. A slider is fixed on the outer wall of the first connecting rod 622, and the slider slides in cooperation with the sliding groove 2321, so that the first connecting rod 622 can slide radially along the sliding groove 2321.

[0094] An elastic rubber sheet 2322 is embedded in the sliding groove 2321. One end of the elastic rubber sheet 2322 is bonded and fixed to the outer wall of the mounting sleeve 23, and the other end is bonded and fixed to the end wall of the sliding groove 2321 away from the mounting sleeve 23. Furthermore, the elastic rubber sheet 2322 is bonded and fixed to the outer wall of the first connecting rod 622 to seal the sliding groove 2321 and prevent drill cuttings or chemicals from entering the linkage structure 63.

[0095] A second connecting rod 632 is fixed to the end of the first connecting rod 622 away from the elastic arc plate 62. The second connecting rod 632 is axially arranged along the mounting sleeve 23 and located between the two third cylindrical gears 631. Racks 633 are fixed to the side walls of the second connecting rod 632 near the two third cylindrical gears 631. The racks 633 mesh with the corresponding third cylindrical gears 631, allowing the second connecting rod 632 to rotate when it moves.

[0096] A rotating shaft is coaxially fixed to the end of the connecting cylinder 54 away from the storage shell 51. The end of this rotating shaft away from the connecting cylinder 54 passes through the surface of the first circular plate 232 and is rotatably connected to the first circular plate 232 via a bearing. A cam plate 55 is coaxially fixed to the end of the rotating shaft located outside the first circular plate 232. A clearance groove 551 is formed in the circumferential direction of the cam plate 55. The end of the second connecting rod 632 away from the first connecting rod 622 is located within the clearance groove 551 to avoid interference between the cam plate 55 and the second connecting rod 632 when rotating. A cam groove 552 is formed on the side of the cam plate 55 near the clearance groove 551, and a connecting shaft 634 is fixed to the side wall of the second connecting rod 632. The end of the connecting shaft 634 away from the second connecting rod 632 is engaged in the cam groove 552 and slides with it, allowing the second connecting rod 632 to move radially via the connecting shaft 634 when the cam plate 55 rotates.

[0097] When the cam plate 55 rotates, the connecting shaft 634, which is locked in the cam groove 552, is pushed by the curved surface of the cam groove 552, which drives the second connecting rod 632 to move continuously and regularly in the sliding groove 2321 of the first circular plate 232.

[0098] When the second connecting rod 632 moves, the racks 633 on both sides move synchronously and mesh with the corresponding third cylindrical gears 631 for transmission. When the second connecting rod 632 moves towards the axis of the mounting sleeve 23, the racks 633 drive the two third cylindrical gears 631 to rotate in opposite directions. When it moves away from the axis, it drives the two third cylindrical gears 631 to rotate in opposite directions. Since the third cylindrical gears 631 are coaxially fixed with the rollers 61, the rollers 61 rotate synchronously with the third cylindrical gears 631 in opposite directions. The two ends of the elastic arc plate 62 are fixed to the outer walls of the two rollers 61. The rotation of the rollers 61 forces the elastic arc plate 62 to undergo periodic deformation: when the rollers 61 rotate towards each other, the elastic arc plate 62 is compressed, and the middle part bulges towards the axis of the mounting sleeve 23; when the rollers 61 rotate in opposite directions, the elastic arc plate 62 is stretched, and the middle part bulges or flattens away from the axis.

[0099] The second liquid outlet 621, which runs through the middle of the elastic arc plate 62, changes synchronously with the deformation of the plate: when the elastic arc plate 62 switches between two convex shapes, the wall of the second liquid outlet 621 continuously undergoes twisting, stretching, and compression. The high-frequency mechanical deformation generates strong internal stress and shear effect inside the hole wall, like a "micro-massage" inside the hole, effectively breaking down and peeling off impurities such as drug crystals and wood fibers attached to the hole wall, and destroying the bonding force between the impurities and the hole wall. These loosened impurities, under their own gravity and inertia, combined with the flushing effect of the drug in the subsequent injection stage, are completely discharged from the second liquid outlet 621, completing the automatic cleaning process of the second liquid outlet 621. This process is driven only by the power of the operator rotating the injection unit 5, which is converted into efficient cleaning of the second liquid outlet 621 through mechanical transmission, ensuring that the injection path remains unobstructed for a long time.

[0100] Based on the above complete structure, this device has two working states: drilling state and fluid injection state. The switching and operation between the two states are as follows:

[0101] The core of the drilling process is to simultaneously drill holes in the tree trunk and collect drill cuttings, while the elastic arc plate 62 retracts inward to form a drainage channel.

[0102] During drilling, the positioning pin 521 engages with a specific set of positioning holes 46 on the collection shell 45, causing the first liquid outlet 541 on the connecting cylinder 54 of the injection unit 5 and the second liquid outlet 621 on the elastic arc plate 62 of the elastic telescopic unit 6 to be completely offset in the circumferential direction. With this design, the first liquid outlet 541 is blocked by the solid portion of the elastic arc plate 62, preventing direct contact with drill cuttings. The elastic arc plate 62 effectively protects the first liquid outlet 541, preventing it from being blocked by drill cuttings during drilling.

[0103] Before the device switches to the injection state, it first enters the cleaning stage. The operator rotates the storage shell 51 of the injection unit 5. Through a series of transmissions including the cam plate 55, connecting shaft 634, second connecting rod 632, and rack 633, the roller 61 is driven to rotate reciprocally, forcing the thin-walled elastic arc plate 62 to produce high-frequency reciprocating elastic deformation. This action can shake off the residue attached to the second liquid outlet 621, achieving active cleaning of the second liquid outlet 621. Because the elastic arc plate 62 is a thin-walled structure, its deformation response is rapid and intense, resulting in a significant cleaning effect. After cleaning is completed, the storage shell 51 is rotated again, so that the first liquid outlet 541 and the second liquid outlet 621 are aligned in the circumferential direction, forming a continuous injection channel.

[0104] During the injection phase, the liquid medicine is ejected from the first outlet hole 541 through the injection pipe 53 and connecting cylinder 54. At this time, the liquid force of the medicine will directly act on the opposite second outlet hole 621, flushing it one last time and further preventing the second outlet hole 621 from becoming blocked. At the same time, by tightening the threaded sleeve 212, the conical elastic sleeve 213 at its end is pushed outward to block the drill hole on the tree trunk, thereby effectively preventing the medicine from leaking out of the hole and ensuring injection pressure and efficiency.

[0105] The specific operating procedure is as follows: First, rotate the threaded sleeve 212 towards the storage shell 51, so that the side wall of the threaded sleeve 212 abuts against the side wall of the drive rotating plate 52, pushing the drive rotating plate 52 to move along the axis of the drill rod sleeve 21 towards the collection shell 45. This continues until the positioning pin 521 on the drive rotating plate 52, assisted by the spring force of the spring 522, is inserted into the positioning hole 46 of the collection shell 45. Simultaneously, the keyway 523 of the drive rotating plate 52 fully engages with the rectangular key 211 of the drill rod sleeve 21. At this point, the collection unit 4, the injection unit 5, and the drill rod 2 form a circumferentially fixed whole, and power can be transmitted sequentially.

[0106] The motor 11 of the drill rig 1 is started, and the motor 11 drives the drive shaft 3 to rotate clockwise around its own axis. The direction in which the drill bit 22 cuts the tree trunk is the clockwise rotation. The drive shaft 3 drives the collection shell 45 to rotate through the first connecting plate 42. The collection shell 45 drives the drive rotating plate 52 to rotate through the engagement of the positioning pin 521 and the positioning hole 46. The drive rotating plate 52 drives the drill rod sleeve 21 to rotate through the engagement of the keyway 523 and the rectangular key 211. The drill rod sleeve 21 drives the mounting sleeve 23 and the drill bit 22 to rotate synchronously. After the drill bit 22 contacts the tree trunk, it gradually cuts into the interior of the tree trunk, completing the drilling operation.

[0107] While the drive shaft 3 rotates, it drives the first cylindrical gear 4511 to rotate. The first cylindrical gear 4511 drives the second cylindrical gear 4512 to rotate through meshing. Since the number of teeth of the second cylindrical gear 4512 is less than that of the first cylindrical gear 4511, the rotational speed of the second cylindrical gear 4512 is higher than that of the first cylindrical gear 4511, thereby driving the first rotating shaft 43 and the fan blade 4513 to rotate at high speed. When the fan blade 4513 rotates inside the first connecting pipe 44, it discharges air to the outside through the ventilation port of the first connecting pipe 44, creating a negative pressure inside the collection shell 45.

[0108] At this time, the linkage structure 63 is in its initial position: the initial position of the cam plate 55 causes the second connecting rod 632 to be located on the side close to the axis of the mounting sleeve 23, and the middle part of the elastic arc plate 62 protrudes towards the axis of the mounting sleeve 23, that is, the elastic arc plate 62 is in a retracted state. After the elastic arc plate 62 retracts, a gap is formed between it and the outer wall of the mounting sleeve 23, which is the drill cuttings discharge channel. The drill cuttings generated during the drilling process are discharged from the cuttings port of the drill bit 22, enter the discharge channel along the mounting groove 231 of the mounting sleeve 23, and then flow into the annular gap between the drill rod sleeve 21 and the injection pipe 53 through the waste slag groove 2331 of the second circular plate 233. Under the action of the negative pressure inside the collection shell 45, the drill cuttings flow into the collection shell 45 along the annular gap for storage, avoiding the blockage of the subsequent injection channel by drill cuttings residue.

[0109] The liquid injection process includes a cleaning phase and an injection phase. The core of the cleaning phase is to drive the elastic arc plate 62 to reciprocate to clean the second liquid outlet 621. The core of the injection phase is to connect the injection unit 5 with the second liquid outlet 621 and keep the elastic arc plate 62 in an inward state for liquid injection.

[0110] After the drill bit 22 reaches the preset depth, the motor 11 of the drill rig 1 is turned off, the drilling operation is stopped, and the cleaning stage begins. First, the threaded sleeve 212 is rotated away from the drive rotating plate 52 along the axis of the drill sleeve 21, causing the side wall of the threaded sleeve 212 to disengage from the side wall of the drive rotating plate 52, thus releasing the axial restriction on the drive rotating plate 52. Then, the drive rotating plate 52 is pulled away from the drill rig 1. The drive rotating plate 52 slides away from the collection shell 45 along the axis of the drill sleeve 21, while compressing the spring 522. The positioning pin 521 moves with the drive rotating plate 52, gradually disengaging from the positioning hole 46 of the collection shell 45 until it is completely disengaged from the positioning hole 46, thus releasing the circumferential positioning between the collection unit 4 and the injection unit 5. The drive rotating plate 52 is pulled further, causing the keyway 523 of the drive rotating plate 52 to completely disengage from the rectangular key 211 of the drill sleeve 21, thus releasing the circumferential linkage between the drive rotating plate 52 and the drill sleeve 21. At this time, the injection unit 5 can rotate freely relative to the collection unit 4 and the drill rod 2 around the axis of the drive shaft 3.

[0111] Manually hold the storage shell 51 and drive it to rotate around the axis of the drive shaft 3. The torque is transmitted to the storage shell 51 and the injection tube 53 in sequence, and finally drives the connecting cylinder 54 and the cam plate 55 coaxially fixed at the end to rotate synchronously.

[0112] As the threaded sleeve 212 moves away from the drill rig 1, the elastic sleeve 213 gradually enters the drilled hole. In this way, the drill rod 2 remains stable under the friction of the elastic sleeve 213 and the hole in the trunk; while the injection unit 5 as a whole can rotate independently and freely around the axis of the drill rod sleeve 21.

[0113] When the cam plate 55 rotates, the connecting shaft 634, which is locked in the cam groove 552, is pushed by the curved surface of the cam groove 552, which drives the second connecting rod 632 to move radially and regularly in the sliding groove 2321 of the first circular plate 232.

[0114] When the second connecting rod 632 moves, the racks 633 on both sides move synchronously and mesh with the corresponding third cylindrical gears 631 for transmission. When the second connecting rod 632 moves towards the axis of the mounting sleeve 23, the racks 633 drive the two third cylindrical gears 631 to rotate in opposite directions. When it moves away from the axis, it drives the two third cylindrical gears 631 to rotate in opposite directions. Since the third cylindrical gears 631 are coaxially fixed with the rollers 61, the rollers 61 rotate synchronously with the third cylindrical gears 631 in opposite directions. The two ends of the elastic arc plate 62 are fixed to the outer walls of the two rollers 61. The rotation of the rollers 61 forces the elastic arc plate 62 to undergo periodic deformation: when the rollers 61 rotate towards each other, the elastic arc plate 62 is compressed, and the middle part bulges towards the axis of the mounting sleeve 23; when the rollers 61 rotate in opposite directions, the elastic arc plate 62 is stretched, and the middle part bulges or flattens away from the axis.

[0115] The second liquid outlet 621, which runs through the middle of the elastic arc plate 62, changes synchronously with the deformation of the plate: when the elastic arc plate 62 switches between two convex shapes, the wall of the second liquid outlet 621 continuously undergoes twisting, stretching, and compression. The high-frequency mechanical deformation generates strong internal stress and shear effect inside the hole wall, like a "micro-massage" inside the hole, effectively breaking down and peeling off impurities such as drug crystals and wood fibers attached to the hole wall, and destroying the bonding force between the impurities and the hole wall. These loosened impurities, under their own gravity and inertia, combined with the flushing effect of the drug in the subsequent injection stage, are completely discharged from the second liquid outlet 621, completing the automatic cleaning process of the second liquid outlet 621. This process is driven only by the power of the operator rotating the injection unit 5, which is converted into efficient cleaning of the second liquid outlet 621 through mechanical transmission, ensuring that the injection path remains unobstructed for a long time.

[0116] After the second outlet hole 621 is cleaned, continue to rotate the storage shell 51, causing the connecting cylinder 54 to rotate synchronously. Adjust the positions of the first outlet hole 541 of the connecting cylinder 54 and the second outlet hole 621 of the elastic arc plate 62 until the first outlet hole 541 and the second outlet hole 621 are completely aligned. At this point, the injection pipe 53, the connecting cylinder 54, the first outlet hole 541, and the second outlet hole 621 form a continuous injection channel.

[0117] During the injection stage, the conical elastic sleeve 213 is slightly disengaged from the hole by screwing the threaded sleeve 212, keeping the locating pin 521 in a non-contact state with the bottom of the locating hole 46, while the keyway 523 and the rectangular key 211 are connected. At this time, the elastic sleeve 213 still seals the drill hole opening in the trunk, restricting the circumferential rotation of the drill rod 2, thereby ensuring that the first liquid outlet 541 and the second liquid outlet 621 remain aligned. This design effectively seals the opening to prevent liquid leakage and avoids misalignment of the liquid outlets caused by the rotation of the drill rod 2, ensuring stable pressure and injection efficiency during the injection process.

[0118] The liquid for preventing trunk borers is injected into the storage shell 51 through the injection port 511 on the side wall of the storage shell 51. Under the action of gravity or the pressure of an external pressurizing device, the liquid flows from the inner cavity of the storage shell 51 into the internal channel of the second connecting pipe 531, then into the internal channel of the injection pipe 53, and then into the internal channel of the connecting cylinder 54. The liquid flows through the first outlet hole 541 on the side wall of the connecting cylinder 54 into the second outlet hole 621 of the elastic arc plate 62, and finally into the drill hole in the trunk from the second outlet hole 621.

[0119] During this stage, the elastic arc plate 62 remains in a retracted state. The angle of the cam plate 55 is fixed, keeping the second connecting rod 632 in a position close to the axis of the mounting sleeve 23. The middle part of the elastic arc plate 62 continues to bulge towards the axis of the mounting sleeve 23.

[0120] During injection, after the injection unit 5 is separated from the drill pipe 2, the cleaning plug 411 installed on the collection shell 45 is opened first to clean the drill cuttings inside the collection shell 45, and then the cleaning plug 411 is sealed.

[0121] Next, motor 11 is started, controlling the drive shaft 3 to rotate in reverse around its own axis. The drive shaft 3 drives the first cylindrical gear 4511 to rotate in reverse synchronously. The first cylindrical gear 4511, through meshing with the second cylindrical gear 4512, drives the second cylindrical gear 4512 to rotate in reverse, thereby driving the first rotating shaft 43 and the fan blade 4513 to rotate in reverse at high speed. When the fan blade 4513 rotates in reverse, it pushes the air in the first connecting pipe 44 into the inner cavity of the collecting shell 45, creating a positive pressure state in the inner cavity of the collecting shell 45. This positive pressure airflow at the inlet of the slag discharge channel exerts a force on the liquid medicine into the hole. Under the action of the liquid gravity and the positive pressure created by the fan blade 4513, the liquid medicine flows out into the depth of the hole.

[0122] After the injection is completed, rotate the threaded sleeve 212 away from the drive plate 52 along the axis of the drill sleeve 21. Pull the drive plate 52 to disengage the positioning pin 521 from the positioning hole 46 and the keyway 523 from the rectangular key 211. Rotate the injection unit 5 in the opposite direction to make the first outlet hole 541 and the second outlet hole 621 misaligned. Finally, pull the device out of the drill hole in the tree trunk to complete one prevention and control operation.

[0123] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A trunk injection control device for forestry trunk borers, comprising a drill (1) and a drill rod (2) driven by said drill (1), characterized in that, Also includes: A collection unit (4) is disposed between the drilling rig (1) and the drill rod (2); An injection unit (5) is connected between the collection unit (4) and the drill rod (2); The injection unit (5) includes a storage shell (51), a drive rotating plate (52), an injection tube (53) and a connecting cylinder (54). The connecting cylinder (54) has a first liquid outlet hole (541) and a cam plate (55) is fixed at one end of the connecting cylinder (54) away from the drill (1). The drill rod (2) includes a drill rod sleeve (21), a drill bit (22), and an installation sleeve (23) arranged coaxially, which are fixedly connected in a detachable manner; the installation sleeve (23) is provided with an elastic telescopic unit (6), the elastic telescopic unit (6) includes an elastic arc plate (62), and the elastic arc plate (62) is provided with a second liquid outlet hole (621). The mounting sleeve (23) is fixed with a first circular plate (232) and a second circular plate (233). The side of the first circular plate (232) away from the drilling rig (1) forms a mounting cavity with the mounting sleeve (23). The cam plate (55) and the linkage structure (63) are arranged in the mounting cavity. The linkage structure (63) includes a second connecting rod (632), a first connecting rod (622), two third cylindrical gears (631), and a rack (633); the second connecting rod (632) is slidably engaged with the cam groove (552) on the cam plate (55) via a connecting shaft (634); the first connecting rod (622) passes through the sliding groove (2321) on the first circular plate (232) and is connected to the elastic arc plate (62); the rack (633) is fixed on the second connecting rod (632) and meshes with the two third cylindrical gears (631); The elastic telescopic unit (6) also includes two rollers (61), and the two ends of the elastic arc plate (62) are respectively fixed on the two rollers (61). The rollers (61) are rotatably connected to the first circular plate (232) through bearings. The third cylindrical gear (631) is coaxially fixed with the rollers (61). The device has two operating states: Drilling state: The elastic arc plate (62) is retracted, and the mounting sleeve (23) and the elastic telescopic unit (6) form the inlet of the discharge channel; Liquid injection state: including cleaning stage and injection stage. In the cleaning stage, the cam plate (55) of the injection unit (5) drives the elastic arc plate (62) to reciprocate through the linkage structure (63) to clean the second liquid outlet (621). In the injection stage, the first liquid outlet (541) of the injection unit (5) is connected to the second liquid outlet (621) for liquid injection. At this time, the elastic arc plate (62) remains in the retracted state.

2. The tree trunk injection control device for forestry trunk borers according to claim 1, characterized in that, The collection unit (4) includes a collection shell (45) and fan blades (4513). The fan blade (4513) is connected to the drive shaft (3) of the drilling rig (1) through the first drive structure (451); The first drive structure (451) includes a first cylindrical gear (4511) and a second cylindrical gear (4512) that mesh with each other. The first cylindrical gear (4511) is coaxially fixed with the drive shaft (3), and the second cylindrical gear (4512) is coaxially fixed with the rotating shaft of the fan blade (4513); The second cylindrical gear (4512) has fewer teeth than the first cylindrical gear (4511).

3. The tree trunk injection control device for forestry trunk borers according to claim 2, characterized in that, The drive plate (52) is circumferentially positioned by the positioning pin (521) and the positioning hole (46) on the collection shell (45), and is connected to the drill pipe sleeve (21) by the keyway (523) and the rectangular key (211). The drive plate (52) is axially fixed by the threaded sleeve (212).

4. The tree trunk injection control device for forestry trunk borers according to claim 1, characterized in that, An elastic rubber sheet (2322) is embedded in the sliding groove (2321) of the first circular plate (232), and the first connecting rod (622) is fixedly connected to the elastic rubber sheet (2322).

5. The tree trunk injection control device for forestry trunk borers according to claim 1, characterized in that, The discharge channel is formed by the space between the inner wall of the drill pipe sleeve (21) and the outer wall of the injection pipe (53).

6. The tree trunk injection control device for forestry trunk borers according to claim 5, characterized in that, The second circular plate (233) is provided with a waste residue trough (2331). When drilling, the drill residue enters the discharge channel through the waste residue trough (2331).

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