Tree core ejection device

Abstract

The utility model belongs to the technical field of forestry investigation tools, and particularly relates to a tree core ejection device which comprises a leading-in cylinder, a pushing cylinder and a pushing cylinder. The guide-in barrel baffle is coupled to the middle of the guide-in barrel; the piston barrel baffle is coupled to the bottom of the guide-in barrel; the piston assembly vertically slides in the leading-in cylinder and is arranged between the leading-in cylinder baffle and the piston cylinder baffle, the top of the piston assembly penetrates through the leading-in cylinder baffle and is used for striking a sample in the growth cone, the bottom of the piston assembly extends out of the piston cylinder baffle, and the bottom of the piston assembly is in limiting fit with the piston cylinder baffle; the piston assembly is elastically connected with the guide-in cylinder baffle. By pulling the bottom of the piston assembly, the top of the piston assembly moves in the direction away from the guide-in barrel baffle, then a growth cone drill bit is placed into the guide-in barrel, after the angle of the drill bit is adjusted, the axis of the sample and the axis of the piston assembly are collinear, the bottom of the piston assembly is loosened, and the top of the piston assembly strikes the sample. The sample is loosened from the inner wall of the growth cone drill bit, so that the sample is conveniently taken out.

Description

Technical Field

[0001] This utility model belongs to the technical field of forestry survey tools, and in particular relates to a tree core ejection device. Background Technology

[0002] In forest resource surveys and ecological research, growth cones are the core tool for tree ring sampling, and their operational efficiency directly affects the quality and efficiency of field data. However, the problem of core retention is particularly prominent when dealing with hardwood species or large-diameter trees—especially in extreme habitats such as karst, high-altitude, arid, and cold regions. To adapt to stressful environments, these trees often enhance their resistance through physiological mechanisms such as increasing wood density, optimizing fiber arrangement, or thickening bark. These characteristics significantly increase the frictional resistance between the sampling tool and the wood, thus greatly increasing the risk of core retention. In existing technologies, abnormal friction between the inner wall of the growth cone and the core not only severely delays the sampling process but may also lead to work interruptions due to tool failure or sample damage. When there is no backup plan, such failures will have a systematic impact on the progress of field surveys.

[0003] Traditional methods for dealing with core jamming often rely on physical tapping or manual prying. However, due to the narrow space inside the growth cone and the fragile nature of the sample, these methods are often ineffective. Rough external force not only makes it difficult to apply precise force but may also accelerate wear on the cone tip, shortening the tool's lifespan. Furthermore, unstable force transmission can easily cause the core structure to be compressed or broken, compromising the integrity of the growth ring information. More importantly, during physical tapping or manual prying, the safety risks of instrument slippage or flying fragments increase significantly, posing a potential threat to personnel safety.

[0004] Therefore, there is an urgent need for a core ejection device to facilitate the extraction of samples from inside the growth cone. Utility Model Content

[0005] The purpose of this invention is to provide a tree core ejection device to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] A tree core ejection device, comprising:

[0008] Inlet tube;

[0009] An inlet tube baffle is axially connected to the middle of the inlet tube;

[0010] The piston cylinder baffle is axially connected to the bottom of the inlet cylinder;

[0011] A piston assembly slides vertically inside the inlet tube. The piston assembly is located between the inlet tube baffle and the piston tube baffle. The top of the piston assembly penetrates the inlet tube baffle and is used to strike the sample inside the growth cone. The bottom of the piston assembly extends out of the piston tube baffle and is limited by the piston tube baffle.

[0012] The piston assembly is elastically connected to the inlet cylinder baffle.

[0013] Optionally, the inlet tube baffle has a central annular hole in the middle, and the inlet tube baffle has a plurality of circumferentially spaced air vents.

[0014] Optionally, the piston cylinder baffle has a central annular hole in the middle, and the piston cylinder baffle has a plurality of circumferentially spaced vent holes.

[0015] Optionally, the piston assembly includes:

[0016] A connecting plate is disposed between the inlet cylinder baffle and the piston cylinder baffle, and the connecting plate is vertically slidably disposed with respect to the inlet cylinder;

[0017] An ejector body is axially connected to the top of the connecting plate, and the top end of the ejector body passes through the central annular hole of the inlet tube baffle.

[0018] A piston rod is axially connected to the bottom of the connecting plate, and the bottom end of the piston rod passes through the piston cylinder baffle through the central annular hole of the piston cylinder baffle.

[0019] The piston handle is axially connected to the bottom of the piston rod, and the piston handle is in a limiting engagement with the piston cylinder baffle.

[0020] Optionally, a plurality of springs are provided between the connecting plate and the inlet cylinder baffle;

[0021] Several springs are circumferentially spaced at equal intervals, with the top end of each spring fixedly connected to the guide cylinder baffle; the bottom end of each spring is fixedly connected to the connecting plate.

[0022] The top and bottom of the spring are respectively fixed to the corresponding inlet cylinder baffle / connecting plate through the spring hook hole.

[0023] Optionally, the inlet tube is made of a transparent material.

[0024] Optionally, the inlet cylinder is an integral structure, and the piston cylinder baffle is threadedly connected to the bottom of the inner side of the inlet cylinder; the inlet cylinder baffle is threadedly connected to the middle of the inner side of the inlet cylinder.

[0025] Optionally, the inlet cylinder has a split structure, comprising an upper inlet cylinder and a lower inlet cylinder. The bottom of the lower inlet cylinder is threadedly connected to the top of the piston cylinder baffle, the top of the lower inlet cylinder is threadedly connected to the bottom of the inlet cylinder baffle, and the bottom of the upper inlet cylinder is threadedly connected to the top of the inlet cylinder baffle.

[0026] Optionally, the piston rod is threadedly fixed to the piston handle.

[0027] Optionally, the ejector body and the connecting plate are threaded together.

[0028] Compared with the prior art, the present invention has the following advantages and technical effects:

[0029] In use, pull the bottom of the piston assembly to move the top of the piston assembly away from the inlet tube baffle. Then, insert the growth cone drill bit into the inlet tube, so that the drill bit abuts against the inlet tube baffle. After adjusting the angle of the drill bit, align the sample axis with the piston assembly axis. Release the bottom of the piston assembly. Under the elastic action of the piston assembly and the inlet tube baffle, the top of the piston assembly touches the sample, loosening the sample from the inner wall of the growth cone drill bit, thus facilitating sample removal. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0032] Figure 2 This is a schematic diagram of the inlet cylinder baffle structure of this utility model;

[0033] Figure 3 This is a schematic diagram of the piston cylinder baffle structure of this utility model;

[0034] Figure 4 This is a schematic diagram of the piston assembly structure of this utility model;

[0035] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0036] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this utility model from another angle;

[0037] Figure 7 This is a schematic diagram of the structure of Embodiment 3 of this utility model;

[0038] The components are as follows: 1. Inlet tube; 2. Inlet tube baffle; 3. Piston assembly; 4. Piston tube baffle; 5. Ejector body; 6. Connecting plate; 7. Piston column; 8. Piston handle; 9. Spring; 10. Center ring hole of inlet tube baffle; 11. Vent hole of inlet tube baffle; 12. Center ring hole of piston tube baffle; 13. Vent hole of piston tube baffle; 14. Slide groove; 15. Retaining ring; 16. Connecting column; 17. Collar; 18. Ejector screw; 19. Drill core block; 20. Receiving groove; 21. Ear plate one; 22. Ear plate two; 23. Binding strap; 24. Growth cone body; 25. Guide channel; 26. Ejector column. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Example 1:

[0042] Reference Figures 1 to 4 This utility model discloses a tree core ejection device, comprising:

[0043] Inlet tube 1;

[0044] The inlet tube baffle 2 is axially connected to the middle of the inlet tube 1;

[0045] Piston cylinder baffle 4 is axially connected to the bottom of inlet cylinder 1;

[0046] Piston assembly 3 slides vertically inside inlet tube 1. Piston assembly 3 is located between inlet tube baffle 2 and piston tube baffle 4. The top of piston assembly 3 penetrates inlet tube baffle 2 and is used to strike the sample inside growth cone. The bottom of piston assembly 3 extends out of piston tube baffle 4 and is limited by piston tube baffle 4.

[0047] The piston assembly 3 is elastically connected to the inlet cylinder baffle 2.

[0048] In use, pull the bottom of the piston assembly 3 to move the top of the piston assembly 3 away from the inlet tube baffle 2. Then, put the growth cone drill bit into the inlet tube 1 and make the drill bit abut against the inlet tube baffle 2. After adjusting the angle of the drill bit, make the sample axis collinear with the axis of the piston assembly 3. Release the bottom of the piston assembly 3. Under the elastic action of the piston assembly 3 and the inlet tube baffle 2, the top of the piston assembly 3 touches the sample, making the sample loose from the inner wall of the growth cone drill bit, thus facilitating the removal of the sample.

[0049] As an optional implementation, the inlet tube baffle 2 has a central annular hole 10 in the middle, and a plurality of circumferentially spaced inlet tube baffle vent holes 11 are provided on the inlet tube baffle 2.

[0050] As an optional implementation, the piston cylinder baffle 4 has a central annular hole 12 in the middle, and a plurality of circumferentially spaced vent holes 13 are provided on the piston cylinder baffle 4.

[0051] As an optional implementation, the piston assembly 3 includes:

[0052] The connecting plate 6 is set between the inlet cylinder baffle 2 and the piston cylinder baffle 4, and the connecting plate 6 and the inlet cylinder 1 are vertically slidably set;

[0053] The ejector body 5 is axially connected to the top of the connecting plate 6, and the top end of the ejector body 5 passes through the center annular hole 10 of the inlet tube baffle 2.

[0054] The piston rod 7 is axially connected to the bottom of the connecting plate 6, and the bottom end of the piston rod 7 passes through the piston cylinder baffle 4 through the central annular hole 12 of the piston cylinder baffle.

[0055] The piston handle 8 is axially connected to the bottom of the piston rod 7, and the piston handle 8 is in a limiting fit with the piston cylinder baffle 4.

[0056] As an optional implementation, a plurality of springs 9 are provided between the connecting plate 6 and the inlet cylinder baffle 2;

[0057] Several springs 9 are arranged at equal intervals around the circumference, with the top of the spring 9 fixedly connected to the guide tube baffle 2; the bottom of the spring 9 is fixedly connected to the connecting plate 6.

[0058] The top and bottom of spring 9 are respectively fixed to the corresponding inlet tube baffle 2 / connecting plate 6 through the spring hook hole.

[0059] As an optional implementation, the inlet tube 1 is made of a transparent material.

[0060] As an optional implementation, the inlet cylinder 1 is an integral structure, with the piston cylinder baffle 4 threadedly connected to the bottom inner side of the inlet cylinder 1; and the inlet cylinder baffle 2 threadedly connected to the middle inner side of the inlet cylinder 1.

[0061] As an optional implementation, the inlet cylinder 1 has a split structure, comprising an upper inlet cylinder and a lower inlet cylinder. The bottom of the lower inlet cylinder is threadedly connected to the top of the piston cylinder baffle 4, the top of the lower inlet cylinder is threadedly connected to the bottom of the inlet cylinder baffle 2, and the bottom of the upper inlet cylinder is threadedly connected to the top of the inlet cylinder baffle 2.

[0062] As an optional implementation, the piston rod 7 is threadedly fixed to the piston handle 8.

[0063] As an optional implementation, the ejector body 5 and the connecting plate 6 are threaded together.

[0064] This device is particularly suitable for the complete extraction of core materials from high-hardness tree species.

[0065] The inlet tube baffle 2 is fixedly connected to the inlet tube 1. Spring hook holes are arranged at the bottom of the inlet tube baffle 2 and spring hook holes are arranged at the top of the connecting plate 6. The two ends of the spring 9 are hooked into the spring hook holes of the connecting plate 6 and the inlet tube baffle 2, respectively.

[0066] The piston assembly 3 consists of an ejector body 5, a connecting plate 6, a piston rod 7, and a piston handle 8. The ejector body 5 and the connecting plate 6 are connected by threads, and the connecting plate 6 and the piston rod 7 are an integral structure. The end of the piston rod 7 away from the connecting plate 6 is connected to the piston handle 8 by a threaded structure. In use, by pulling the piston handle 8, the spring 9 between the connecting plate 6 and the guide tube baffle 2 is further stretched to store energy. Releasing the spring 9 causes the ejector body 5 to move in a predetermined direction, thereby ejecting the tree core that is stuck in the growth cone.

[0067] The following sections will describe the assembly process and the usage process in turn.

[0068] Device assembly process:

[0069] When the inlet tube 1 has a split structure, the inlet tube 1 is divided into an upper inlet tube and a lower inlet tube;

[0070] Connect the top of the inlet tube baffle 2 to the bottom of the upper half inlet tube with threads;

[0071] Screw the threaded end of the ejector 5 into the corresponding threaded hole of the connecting plate 6 to complete the rigid connection between the two.

[0072] The connecting plate 6 is axially connected to the piston column 7; the connecting plate 6 and the piston column 7 can be connected by threads, or the connecting plate 6 and the piston column 7 can be set as an integral structure.

[0073] Hang the first end of the spring 9 on the pre-set hook hole of the guide tube baffle 2 to ensure a firm attachment;

[0074] Hook the end of spring 9 to the corresponding hook hole of piston connecting plate 6, and adjust the spring axis to be parallel to the center line of inlet cylinder 1;

[0075] With the spring 9 in its natural extended state, adjust the ejector body 5 so that its front end precisely passes through the central annular hole 10 of the guide tube baffle;

[0076] The lower half of the inlet sleeve is installed on the outside of the piston assembly 3 and is threaded to the bottom of the inlet sleeve baffle 2;

[0077] After the piston rod 7 passes through the central annular hole 12 of the piston cylinder baffle, the piston cylinder baffle 4 is threadedly connected to the lower half of the guide cylinder.

[0078] Screw the piston handle 8 into the threaded interface at the tail end of the piston rod 7 to complete the overall installation of the equipment.

[0079] Device operation method:

[0080] Insert the growth cone drill bit axially into the cavity of the inlet cylinder 1;

[0081] By observing through the transparent inlet tube 1, the drill bit angle is adjusted in real time to make the axis of the stuck tree core coincide with the center of the front end of the ejector body 5;

[0082] Fine-tune the drill bit position to ensure that the edge of the cutting edge avoids the inner wall of the center annular hole 10 of the guide tube baffle, so as to prevent the cutting edge from being scratched and damaged.

[0083] Make the core section of the growing cone contact the front end of the ejector body 5, and gently press the ejector body 5 along the axial direction of the guide tube 1 to make it retract to the guide tube baffle 2.

[0084] Hold the piston handle 8 and apply force smoothly away from the cylinder to stretch the spring 9. Release the piston handle 8, and the elastic potential energy of the spring 9 will drive the ejector body 5 to accelerate instantly. The impact force at the front end of the ejector body 5 will act directionally on the stuck tree core, achieving low-damage ejection. During this process, the stretching length of the spring 9 will be tested from short to long and adjusted according to the ejection situation to avoid excessive impact that could damage the tree core.

[0085] Example 2:

[0086] refer to Figures 5 to 6 The difference between this embodiment and embodiment 1 is that when the inlet cylinder 1 is an integrally formed structure, the inlet cylinder 1 is symmetrically provided with a sliding groove 14, and a connecting post 16 is slidably connected in the sliding groove 14. One end of the connecting post 16 is fixedly connected to the side wall of the inlet cylinder baffle 2, and the two connecting posts 16 are fixedly connected to the inner wall of the collar 17 at the ends away from the inlet cylinder baffle 2. A set screw 18 is threaded on the collar 17, and the set screw 18 is pressed against the outer wall of the inlet cylinder 1 to fix the inlet cylinder baffle 2 to the inlet cylinder 1.

[0087] The top of the inlet tube baffle 2 is fitted with a retaining ring 15, which is axially connected inside the inlet tube 1.

[0088] In use, by loosening the set screw 18, the guide tube baffle 2 can slide on the guide tube 1 through the connection post 16 and the slide groove 14 to adjust its vertical position. Then, by rotating the set screw 18, it is pressed against and squeezed against the outer wall of the guide tube 1, thus fixing the guide tube baffle 2. By adjusting the position of the guide tube baffle 2 on the guide tube 1, the tension of the spring 9 can be adjusted, thereby adjusting the impact force of the ejector body 5.

[0089] Example 3:

[0090] refer to Figure 6 The difference between this embodiment and embodiment 1 is that the inlet tube 1 is placed in the core block 19 through the receiving groove 20. The core block 19 has a guide channel 25 in the middle for the growth cone body 24 to pass through. Two symmetrically arranged top posts 26 are fixed to the end of the core block 19 near the tree. One ear plate 21 is fixed to one end of the core block 19, and another ear plate 22 is fixed to the other end of the core block 19. A through hole is opened on the ear plate 21. One end of the binding strap 23 passes through the through hole of the ear plate 21, and the other end of the binding strap 23 is limited and matched with the ear plate 21. Two through holes are opened on the ear plate 22. The end of the binding strap 23 away from the ear plate 21 passes through the two through holes of the ear plate 22 in sequence.

[0091] In use, the inlet tube 1 is placed in the core drilling block 19 through the receiving groove 20 for easy carrying. During core drilling and sampling, the core drilling block 19 is abutted against one side of the tree through the top post 26. Then, after one end of the binding strap 23 is matched with the ear plate 21 for limiting, it is wrapped around the tree and passed through the two through holes on the ear plate 22 to tighten the binding strap 23 to the tree. Since the length of the binding strap 23 can be changed, it is suitable for trees of different diameters. A guide channel 25 is opened in the middle of the core drilling block 19. The growth cone body 24 drills the tree perpendicular to the trunk direction through the guide channel 25, which can prevent the problem of inaccurate sampling caused by directional tilt during drilling. This device is convenient to carry and can also effectively prevent loss by placing it in the core drilling block 19.

[0092] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0093] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A tree core ejection device, characterized in that, include: Inlet tube (1); The inlet tube baffle (2) is axially connected to the middle part of the inlet tube (1); The piston cylinder baffle (4) is axially connected to the bottom of the inlet cylinder (1); The piston assembly (3) slides vertically inside the inlet tube (1). The piston assembly (3) is located between the inlet tube baffle (2) and the piston tube baffle (4). The top of the piston assembly (3) passes through the inlet tube baffle (2). The top of the piston assembly (3) is used to touch the sample inside the growth cone. The bottom of the piston assembly (3) extends out of the piston tube baffle (4). The bottom of the piston assembly (3) is limited and matched with the piston tube baffle (4). The piston assembly (3) is elastically connected to the inlet cylinder baffle (2).

2. The tree core ejection device according to claim 1, characterized in that: The inlet tube baffle (2) has a central annular hole (10) in the middle and a plurality of circumferentially spaced air holes (11) on the inlet tube baffle (2).

3. The tree core ejection device according to claim 2, characterized in that: The piston cylinder baffle (4) has a central annular hole (12) in the middle and a plurality of circumferentially spaced vent holes (13) on the piston cylinder baffle (4).

4. The tree core ejection device according to claim 3, characterized in that: The piston assembly (3) includes: A connecting plate (6) is disposed between the inlet cylinder baffle (2) and the piston cylinder baffle (4), and the connecting plate (6) and the inlet cylinder (1) are vertically slidably disposed; The ejector body (5) is axially connected to the top of the connecting plate (6), and the top end of the ejector body (5) passes through the central annular hole (10) of the inlet tube baffle (2). The piston rod (7) is axially connected to the bottom of the connecting plate (6), and the bottom end of the piston rod (7) passes through the piston cylinder baffle (4) through the central annular hole (12) of the piston cylinder baffle. The piston handle (8) is axially connected to the bottom of the piston rod (7), and the piston handle (8) is in a limiting fit with the piston cylinder baffle (4).

5. A tree core ejection device according to claim 4, characterized in that: A plurality of springs (9) are provided between the connecting plate (6) and the inlet cylinder baffle (2); A plurality of springs (9) are arranged at equal intervals around the circumference, the top end of the springs (9) is fixedly connected to the guide tube baffle (2); the bottom end of the springs (9) is fixedly connected to the connecting plate (6); The top and bottom of the spring (9) are respectively fixed to the corresponding inlet tube baffle (2) / connecting plate (6) through the spring hook hole.

6. The tree core ejection device according to claim 1, characterized in that: The inlet tube (1) is made of transparent material.

7. A tree core ejection device according to claim 4, characterized in that: The inlet cylinder (1) is an integral structure, and the piston cylinder baffle (4) is threadedly connected to the bottom of the inner side of the inlet cylinder (1); the inlet cylinder baffle (2) is threadedly connected to the middle of the inner side of the inlet cylinder (1).

8. A tree core ejection device according to claim 4, characterized in that: The inlet cylinder (1) is a split structure, comprising an upper inlet cylinder and a lower inlet cylinder. The bottom of the lower inlet cylinder is threaded to the top of the piston cylinder baffle (4), the top of the lower inlet cylinder is threaded to the bottom of the inlet cylinder baffle (2), and the bottom of the upper inlet cylinder is threaded to the top of the inlet cylinder baffle (2).

9. A tree core ejection device according to claim 4, characterized in that: The piston rod (7) is threadedly fixed to the piston handle (8).

10. A tree core ejection device according to claim 4, characterized in that: The ejector body (5) and the connecting plate (6) are threaded together.

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