Forestry tree sample collecting device

Abstract

The invention discloses a forestry tree sample collection device, and relates to the technical field of tree sample collection, the forestry tree sample collection device comprises a positioning frame, the side wall of the positioning frame is fixedly connected with a handle, the inner bottom surface of the positioning frame is provided with a wire puller, a winding shaft of the wire puller is fixedly connected with a crank, and the winding shaft of the wire puller is wound with a pull rope; the device has the advantages that the taper pipe can be automatically positioned, the screwing depth of the taper pipe can be automatically controlled, manual subjective judgment is not needed, the position of the taper pipe does not need to be estimated through an extractor, accuracy and convenience are achieved, the sample collection efficiency is improved, the sample quality is guaranteed, meanwhile, the device can adapt to sample collection of various trees, and the labor intensity of workers is lowered. The screw-in depth of the growth cone can also be adaptively adjusted, so that the quality and efficiency of sample collection are further ensured, the sample can be automatically extracted, an extractor is not needed to assist sampling, the operation steps are reduced, the test tube and the sample are simple and convenient to extract, the sample is prevented from falling or being polluted, and the quality of the sample is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tree sample collection, in particular to a forestry tree sample collection device. BACKGROUND

[0002] Forestry tree sample collection is the basis of forest resource investigation, ecological research and genetic analysis work, and needs to follow scientific norms to ensure the representativeness of the sample and the accuracy of the data, which includes the collection of tree core samples. The specific operation steps are as follows: preparing a growth cone, selecting a target tree, placing the growth cone at the breast height of the tree, keeping the growth cone perpendicular to the trunk to avoid deformation of the annual rings caused by oblique drilling, aligning the cone tip with the target point, lightly pressing and rotating 2-3 turns, fixing the initial position, then uniformly applying force and rotating the growth cone clockwise until the growth cone is drilled to the half position of the tree, a representative sample is obtained, the extractor is inserted and the wood core is slowly pulled out, and finally the sample is covered with a foldable straw to complete the collection of the tree sample.

[0003] In the above process, the depth of the growth cone cannot be automatically controlled and needs to be judged subjectively by the operator, and the depth is estimated by the extractor at any time, which is neither accurate nor convenient, and also affects the extraction efficiency of the sample and the quality of the sample. In addition, the breast height diameter of different trees is variable, which makes the depth of the growth cone variable, further affecting the sample collection efficiency, and the extractor is also needed to assist in sampling, increasing the operation steps, and the straw cannot be taken out of the sample, which is easy to make the sample fall or be contaminated, affecting the quality of the sample.

[0004] Through retrieval, Chinese patent application CN118329499A discloses a forestry tree sample collection device, which can sample the bark at different heights on the trunk, but still has the above problems, and cannot automatically adjust the depth of the cone tube according to the breast height diameter of the tree. At the same time, the reset of the collection device and the collection of the sample cannot be performed simultaneously, the sampling period cannot be shortened, and the sampling efficiency cannot be further improved. SUMMARY

[0005] The present application relates to the technical field of tree sample collection, in particular to a forestry tree sample collection device.

[0006] To solve the problems in the background art, the present application provides the following technical scheme: a forestry tree sample collection device, comprising a positioning frame, a handle is fixedly connected to the side wall of the positioning frame, a puller is installed on the inner bottom surface of the positioning frame, a winding shaft of the puller is fixedly connected with a crank handle, a pull rope is wound on the winding shaft of the puller, a first support and a second support are fixedly connected to the inner bottom surface of the positioning frame, an input shaft is rotatably sleeved on the first support, an embedded wheel is fixedly connected to one end of the input shaft, a first driving gear is fixedly connected to the other end of the input shaft, a first variable gear is meshingly connected to the outer surface of the first driving gear, a first rotating shaft is fixedly connected to the central axis of the first variable gear, a first coaxial gear is fixedly connected to the end of the first rotating shaft, a second variable gear is meshingly connected to the outer surface of the first coaxial gear, a second rotating shaft is fixedly connected to the central axis of the second variable gear, a second coaxial gear is fixedly connected to the end of the second rotating shaft, a driven gear is meshingly connected to the outer surface of the second coaxial gear, a screw rod is fixedly connected to the central axis of the driven gear, one end of a baffle is meshingly sleeved on the outer surface of the screw rod, the other end of the baffle is sleeved with a guide rod, and a pulley is installed on the bottom surface of the positioning frame.

[0007] As a further scheme of the present application: the pull rope is meshingly sleeved with the embedded wheel, the pull rope is slidingly sleeved with the positioning frame, and the pull rope is slidingly sleeved with the pulley, the first rotating shaft is rotatably connected with the second support, the second rotating shaft is rotatably connected with the second support, the screw rod is sleeved with the second support, and the second support is arranged in an L shape.

[0008] As a further scheme of the present application: the pitch of the screw rod is times the circumference of the input shaft, the number of teeth of the first driving gear is the number of teeth of the first variable gear is the number of teeth of the first coaxial gear is the number of teeth of the second variable gear is the number of teeth of the second coaxial gear is the number of teeth of the driven gear is times the rotating speed of the screw rod.

[0009] As a further scheme of the present application: the guide rod is fixedly connected with the side wall of the positioning frame, two handles are provided, and the two handles are symmetrically arranged about the bisector of the baffle.

[0010] As a further scheme of the present application: the baffle is sleeved with a taper pipe, one end of the taper pipe is provided with an embedding slot, the other end of the taper pipe is fixedly connected with an external thread, the outer surface of the external thread is engaged with a positioning frame, an inner cavity is formed in the baffle, and a motor is installed on the side wall of the baffle, the output end of the motor is fixedly connected with a second driving gear, the outer surface of the second driving gear is engaged with a transmission gear, and the inner surface of the transmission gear is fixedly connected with an embedding block.

[0011] As a further scheme of the present application: the embedding slot is engaged with the embedding block, and the taper pipe can penetrate the positioning frame, and the second driving gear and the transmission gear are located in the inner cavity.

[0012] As a further scheme of the present application: the end of the taper pipe is rotatably connected with a fixed nozzle, the outer surface of the fixed nozzle is communicated with one end of a connecting pipe, the other end of the connecting pipe is communicated with a fixed cylinder, a multi-stage piston rod is slidably sleeved in the fixed cylinder, a fixed piston rod is slidably sleeved in the multi-stage piston rod, the end of the fixed piston rod is fixedly connected with the fixed nozzle, the inner surface of the taper pipe is provided with a groove, a clamping block is rotatably connected in the groove, and a return spring is fixedly connected between the clamping block and the groove.

[0013] As a further scheme of the present application: the end of the fixed nozzle can be engaged with a test tube, the fixed cylinder is fixedly connected with the baffle, the diameter of the multi-stage piston rod gradually decreases, the clamping block is sleeved with the groove, the side surface of the clamping block is an arc surface, the groove limits the clockwise rotation of the clamping block, and the length of the clamping block is greater than the inner radius of the taper pipe.

[0014] By adopting the above technical scheme: compared with the prior art, the present application has the following beneficial effects:

[0015] 1、The second driving gear drives the transmission gear to rotate, so that the embedding block on the transmission gear drives the taper pipe to rotate, so that the external thread on the taper pipe rotates, the external thread is engaged with the positioning frame, the external thread drives the taper pipe to rotate and translate, the taper pipe is initially screwed into the tree, when the external thread is separated from the positioning frame, the external thread is engaged with the tree, and then the taper pipe can continue to be screwed into the tree until the fixed nozzle on the taper pipe contacts the baffle again, at this time, the baffle blocks the further penetration of the taper pipe in cooperation with the fixed nozzle, the purpose of automatically positioning the taper pipe is achieved, the screwing depth of the taper pipe can be automatically controlled, manual subjective judgment is not required, and the position of the taper pipe is not required to be estimated through the extractor, which is accurate and convenient, improves the sample collection efficiency, guarantees the quality of the sample, can adapt to the sample collection of various trees, and the screwing depth of the growth taper can be adaptively adjusted, further guaranteeing the quality and efficiency of sample collection.

[0016] 2、The conical tube gradually resets, in the process, when the conical tube is initially reset, the clamping block is lifted by the continuous pressure of the reset spring, and is inserted into the tree with the reset rotation of the conical tube, because the length of the clamping block is greater than the inner radius of the conical tube, the clamping block cuts off the tree with the rotation of the conical tube, with the continuous return of the conical tube, the fixed piston rod on the fixed nozzle makes the multi-stage piston rod negative pressure, and the air in the fixed nozzle and the conical tube is sucked through the connecting pipe, so that the sample in the conical tube is pulled, and finally enters the test tube, achieving the purpose of automatic sample extraction, without the need of extractor auxiliary sampling, reducing the operation steps, at the same time, the test tube and the sample are easily taken out, avoiding the falling or pollution of the sample, and ensuring the quality of the sample.

[0017] 3、The air in the fixed nozzle and the conical tube is sucked through the connecting pipe, so that the sample in the conical tube is pulled, and finally enters the test tube, in the above process, the reset of the collecting device and the collection of the sample can be carried out at the same time, further shortening the sampling period, so that the sampling efficiency can be further improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic diagram of the forestry tree sample collecting device of the application;

[0019] Figure 2 It is a half-section schematic diagram of the baffle structure in the embodiment of the application;

[0020] Figure 3 It is a half-section schematic diagram of the baffle structure in the embodiment of the application; Figure 2 It is an enlarged view of the structure in part A;

[0021] Figure 4 It is a schematic diagram of the embedded wheel structure in the embodiment of the application;

[0022] Figure 5 It is an enlarged view of the structure in part B; Figure 2

[0023] Figure 6 It is a half-section schematic diagram of the conical tube structure in the embodiment of the application;

[0024] Figure 7 It is an enlarged view of the structure in part C; Figure 6

[0025] Figure 8 It is an enlarged view of the structure in part D; Figure 6

[0026] Figure 9 It is a half-section schematic diagram of the fixed cylinder structure in the embodiment of the application.

[0027] ​​​In the figure: 1, positioning frame; 2, handle; 3, puller; 4, crank; 5, pull rope; 6, first support; 7, second support; 8, input shaft; 9, embedded wheel; 10, first driving gear; 11, first gear shift; 12, first rotating shaft; 13, first coaxial gear; 14, second gear shift; 15, second rotating shaft; 16, second coaxial gear; 17, driven gear; 18, screw rod; 19, baffle; 20, guide rod; 21, pulley; 22, tapered pipe; 23, embedding groove; 24, external thread; 25, inner cavity; 26, motor; 27, second driving gear; 28, transmission gear; 29, embedded block; 30, fixed nozzle; 31, connecting pipe; 32, fixed cylinder; 33, multi-stage piston rod; 34, fixed piston rod; 35, groove; 36, clamping block; 37, reset spring. DETAILED DESCRIPTION

[0028] The specific embodiments of the present application will be further described below with reference to the drawings. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0029] Example 1

[0030] Referring to Figures 1-4 , the present application provides a technical solution: a forestry tree sample collection device, comprising a positioning frame 1, a handle 2 is fixedly connected to the side wall of the positioning frame 1, and a puller 3 is installed on the inner bottom surface of the positioning frame 1, a crank 4 is fixedly connected to the winding shaft of the puller 3, and a pull rope 5 is wound on the winding shaft of the puller 3, a first support 6 and a second support 7 are fixedly connected to the inner bottom surface of the positioning frame 1, an input shaft 8 is rotatably connected to the first support 6, an embedded wheel 9 is fixedly connected to one end of the input shaft 8, a first driving gear 10 is fixedly connected to the other end of the input shaft 8, a first gear shift 11 is connected to the outer surface of the first driving gear 10, a first rotating shaft 12 is fixedly connected to the central axis of the first gear shift 11, a first coaxial gear 13 is fixedly connected to the end of the first rotating shaft 12, a second gear shift 14 is connected to the outer surface of the first coaxial gear 13, a second rotating shaft 15 is fixedly connected to the central axis of the second gear shift 14, a second coaxial gear 16 is fixedly connected to the end of the second rotating shaft 15, a driven gear 17 is connected to the outer surface of the second coaxial gear 16, a screw rod 18 is fixedly connected to the central axis of the driven gear 17, one end of a baffle 19 is rotatably connected to the outer surface of the screw rod 18, the other end of the baffle 19 is sleeved with a guide rod 20, and a pulley 21 is installed on the bottom surface of the positioning frame 1.

[0031] Referring to Figure 1 , Figure 3 and Figure 4The pull rope 5 is nested with the embedded wheel 9, the pull rope 5 is slidingly nested with the positioning frame 1, and the pull rope 5 is slidingly nested with the pulley 21. The first rotating shaft 12 is rotationally connected with the second support 7. The second rotating shaft 15 is rotationally connected with the second support 7. The screw rod 18 is nested with the second support 7. The second support 7 is arranged in an L shape.

[0032] Please refer to Figure 4 The pitch of the screw rod 18 is The number of teeth of the first driving gear 10 is The number of teeth of the first variable gear 11 is The number of teeth of the first coaxial gear 13 is The number of teeth of the second variable gear 14 is The number of teeth of the second coaxial gear 16 is The number of teeth of the driven gear 17 is The rotating speed of the input shaft 8 is times the rotating speed of the screw rod 18.

[0033] Please refer to Figure 2 The guide rod 20 is fixedly connected with the side wall of the positioning frame 1. The handle 2 is provided with two handles, and the two handles are symmetrically arranged about the bisector of the baffle 19.

[0034] Specifically, in the process of collecting tree samples, the positioning frame 1 is attached to the tree through the handle 2, so that the cone pipe 22 is automatically perpendicular to the breast diameter of the tree, avoiding the deformation of the annual ring caused by the oblique drilling of the cone pipe 22. At this time, the end of the pull rope 5 is pulled again, so that the pull rope 5 surrounds the breast diameter of the tree, and the pull rope 5 is tightened through the crank 4, so that the pull rope 5 is tightly attached to the tree. In this process, the moving pull rope 5 drives the embedded wheel 9 to rotate, so that the input shaft 8 of the embedded wheel 9 drives the first driving gear 10 to rotate, so that the first driving gear 10 drives the first variable gear 11 to rotate, so that the first rotating shaft 12 on the first variable gear 11 drives the first coaxial gear 13 to rotate, so that the first coaxial gear 13 drives the second variable gear 14 to rotate, so that the second rotating shaft 15 on the second variable gear 14 drives the second coaxial gear 16 to rotate, so that the second coaxial gear 16 drives the driven gear 17 to rotate, so that the screw rod 18 on the driven gear 17 rotates. Due to the number of teeth of the first driving gear 10, the first variable gear 11, the first coaxial gear 13, the second variable gear 14, the second coaxial gear 16 and the driven gear 17, the angular velocity of the input shaft 8 is times the angular velocity of the screw rod 18, close to value, and the moving length of the pull rope 5 satisfies the formula , wherein is the number of turns of the input shaft 8, is the diameter of the input shaft 8, is the diameter of the sampling place of the tree. At this time, the diameter of the sampling place satisfies the formula When the input shaft 8 rotates , the number of revolutions of the screw rod 18 is , and when the screw rod 18 rotates, the baffle 19 on the screw rod 18 moves, and the baffle 19 is limited to translation by the guide rod 20, so that the baffle 19 is separated from the fixed nozzle 30 and moves close to the positioning frame 1 under the driving of the screw rod 18, and the movement distance of the baffle 19 satisfies the formula , wherein is the number of revolutions of the screw rod 18, is the pitch of the screw rod 18, and the pitch of the screw rod 18 is of the circumference of the input shaft 8, , so that the diameter of the tree sampling position and the movement distance of the baffle 19 satisfy the formula , so that the displacement of the baffle 19 is the radius of the tree sampling position; after the positioning of the baffle 19, the motor 26 on the baffle 19 is started, so that the motor 26 drives the transmission gear 28 to rotate through the second driving gear 27, so that the block 29 on the transmission gear 28 drives the taper pipe 22 to rotate through the matching of the block groove 23, so that the external thread 24 on the taper pipe 22 rotates, and the external thread 24 is meshed and sleeved with the positioning frame 1, so that the external thread 24 drives the taper pipe 22 to rotate and translate, so that the taper pipe 22 is preliminarily screwed into the tree, when the external thread 24 is separated from the positioning frame 1, the external thread 24 has been meshed and sleeved with the tree, so that the taper pipe 22 can continuously screw into the tree, until the fixed nozzle 30 on the taper pipe 22 contacts the baffle 19 again, at this time, the baffle 19 blocks the further penetration of the taper pipe 22 in cooperation with the fixed nozzle 30, so as to achieve the purpose of automatically positioning the taper pipe 22, so that the screwing depth of the taper pipe 22 can be automatically controlled, without the need for artificial subjective judgment, and without the need for estimating the position of the taper pipe 22 through the extractor, which is accurate, convenient, improves the sample collection efficiency, guarantees the sample quality, and can adapt to sample collection of various trees, and the screwing depth of the growth cone can be adaptively adjusted, further guaranteeing the quality and efficiency of sample collection.

[0035] Embodiment 2

[0036] Please refer to Figure 1 , Figure 2 and Figure 5 , the present application provides a technical scheme: a forestry tree sample collection device, the baffle 19 is sleeved with the taper pipe 22, one end of the taper pipe 22 is provided with the block groove 23, the other end of the taper pipe 22 is fixedly connected with the external thread 24, the outer surface of the external thread 24 is meshed and sleeved with the positioning frame 1, the baffle 19 is provided with the inner cavity 25, and the motor 26 is installed on the side wall of the baffle 19, the output end of the motor 26 is fixedly connected with the second driving gear 27, the outer surface of the second driving gear 27 is meshed and connected with the transmission gear 28, and the inner surface of the transmission gear 28 is fixedly connected with the block 29.

[0037] Please refer to Figure 2 and Figure 5 The taper pipe 22 can penetrate the positioning frame 1, and the second driving gear 27 and the transmission gear 28 are located in the inner cavity 25.

[0038] Specifically, in the process of extracting the sample, the test tube is engaged with the fixed nozzle 30, at this time, the test tube, the fixed nozzle 30 and the taper pipe 22 are sealed, and then the motor 26 is started in reverse, and according to the above steps, the taper pipe 22 is gradually reset, in this process, when the taper pipe 22 is initially reset, the clamping block 36 continuously pressed by the reset spring 37 is lifted and inserted into the tree with the rotation reset of the taper pipe 22, because the length of the clamping block 36 is greater than the inner radius of the taper pipe 22, the clamping block 36 cuts off the tree with the rotation of the taper pipe 22, and as the taper pipe 22 continues to return, the fixed piston rod 34 on the fixed nozzle 30 makes the multi-stage piston rod 33 negative pressure, and the air in the fixed nozzle 30 and the taper pipe 22 is sucked through the connecting pipe 31, so that the sample in the taper pipe 22 is pulled and finally enters the test tube, achieving the purpose of automatically extracting the sample, without the need for the extractor to assist in sampling, reducing the operation steps, and the test tube and the sample are easily taken out, avoiding the falling or pollution of the sample, and ensuring the quality of the sample.

[0039] Example 3

[0040] Please refer to Figure 2 and Figures 6-9 The present application provides a technical solution: a forestry tree sample collection device, the end of the taper pipe 22 is rotationally connected with the fixed nozzle 30, the outer surface of the fixed nozzle 30 is communicated with one end of the connecting pipe 31, the other end of the connecting pipe 31 is communicated with the fixed cylinder 32, the multi-stage piston rod 33 is slidably sleeved in the fixed cylinder 32, the fixed piston rod 34 is slidably sleeved in the multi-stage piston rod 33, the end of the fixed piston rod 34 is fixedly connected with the fixed nozzle 30, the inner surface of the taper pipe 22 is provided with a groove 35, the clamping block 36 is rotationally connected in the groove 35, and the reset spring 37 is fixedly connected between the clamping block 36 and the groove 35.

[0041] Please refer to Figure 2 , Figure 6 and Figure 7 The end of the fixed nozzle 30 can be engaged with the test tube, the fixed cylinder 32 is fixedly connected with the baffle 19, the diameter of the multi-stage piston rod 33 gradually decreases, the clamping block 36 is sleeved with the groove 35, the side surface of the clamping block 36 is arc-shaped, the groove 35 limits the clockwise rotation of the clamping block 36, and the length of the clamping block 36 is greater than the inner radius of the taper pipe 22.

[0042] Specifically, in the process of resetting the device, the fixed piston rod 34 on the fixed nozzle 30 causes the multi-stage piston rod 33 to be under negative pressure, and the air in the fixed nozzle 30 and the conical tube 22 is sucked through the connecting pipe 31, so that the sample in the conical tube 22 is pulled and finally enters the test tube. In the above process, the resetting of the sampling device and the collection of the sample can be carried out at the same time, further shortening the sampling period, thereby further improving the sampling efficiency.

[0043] The working principle and use process of the present application: when it is necessary to collect the sample of a tree, the positioning frame 1 is attached to the tree by the handle 2, so that the conical tube 22 is automatically perpendicular to the breast diameter of the tree, avoiding the deformation of the annual rings caused by the oblique drilling of the conical tube 22. At this time, the end of the pull rope 5 is pulled, so that the pull rope 5 surrounds the breast diameter of the tree, and the pull rope 5 is tightened by the crank 4, so that the pull rope 5 is tightly attached to the tree. In this process, the moving pull rope 5 drives the sun gear 9 to rotate, so that the input shaft 8 on the sun gear 9 drives the first driving gear 10 to rotate, so that the first driving gear 10 drives the first speed change gear 11 to rotate, so that the first rotating shaft 12 on the first speed change gear 11 drives the first coaxial gear 13 to rotate, so that the first coaxial gear 13 drives the second speed change gear 14 to rotate, and then the second rotating shaft 15 on the second speed change gear 14 drives the second coaxial gear 16 to rotate, so that the second coaxial gear 16 drives the driven gear 17 to rotate, so that the screw 18 on the driven gear 17 rotates, and the number of teeth of the first driving gear 10, the first speed change gear 11, the first coaxial gear 13, the second speed change gear 14, the second coaxial gear 16 and the driven gear 17 is designed so that the angular velocity of the input shaft 8 is times the angular velocity of the screw 18, close to , and the moving length of the pull rope 5 satisfies the formula , wherein is the number of turns of the input shaft 8, is the diameter of the input shaft 8, is the diameter of the sampling place of the tree, and the diameter of the sampling place at this time satisfies the formula , when the input shaft 8 rotates turns, the number of turns of the screw 18 is , and when the screw 18 rotates, the baffle 19 on the screw 18 moves, and the baffle 19 is limited to translation by the guide rod 20, so that the baffle 19 is separated from the fixed nozzle 30 and approaches the positioning frame 1 under the drive of the screw 18. At this time, the moving distance of the baffle 19 satisfies the formula , wherein is the number of turns of the screw 18, is the pitch of the screw 18, and the pitch of the screw 18 is of the circumference of the input shaft 8, and the number of turns of the screw 18 is , so that the diameter of the sampling place of the tree and the moving distance of the baffle 19 satisfy the formula Therefore, the displacement of the baffle 19 is the radius of the tree sampling point;

[0044] After the baffle 19 is positioned, the motor 26 on the baffle 19 is started, causing the motor 26 to drive the transmission gear 28 to rotate via the second drive gear 27. This causes the insert 29 on the transmission gear 28 to engage with the groove 23, driving the tapered tube 22 to rotate. Consequently, the external thread 24 on the tapered tube 22 rotates, and the external thread 24 engages with the positioning frame 1. This causes the external thread 24 to drive the tapered tube 22 to rotate and translate, allowing the tapered tube 22 to initially screw into the tree. When the external thread 24 disengages from the positioning frame 1, it has already engaged with the tree, allowing the tapered tube 22 to continue screwing in. The tree is inserted until the fixed nozzle 30 on the cone tube 22 contacts the baffle 19 again. At this time, the baffle 19, together with the fixed nozzle 30, prevents the cone tube 22 from going further in, thus achieving the purpose of automatically positioning the cone tube 22. This allows the insertion depth of the cone tube 22 to be automatically controlled without the need for subjective human judgment or estimation of the position of the cone tube 22 through the extractor. This is accurate, convenient, and improves the efficiency of sample collection, ensuring the quality of the sample. It can also adapt to the sample collection of various trees, and the insertion depth of the growth cone can be adaptively adjusted, further ensuring the quality and efficiency of sample collection.

[0045] In the above process, after the conical tube 22 reaches the designated position, it engages the test tube with the fixed nozzle 30. At this time, the test tube, the fixed nozzle 30, and the conical tube 22 are sealed. Then, the motor 26 is started in reverse. According to the above steps, the conical tube 22 is gradually reset. During this process, when the conical tube 22 is initially reset, the locking block 36, which is continuously pressed by the reset spring 37, is lifted up and resets with the rotation of the conical tube 22, inserting into the tree. Because the length of the locking block 36 is greater than the inner radius of the conical tube 22, the locking block 36 cuts the tree with the rotation of the conical tube 22. As the conical tube 22 continues to return, the fixed piston rod 34 on the fixed nozzle 30 causes the multi-stage piston rod 33 to be under negative pressure, and draws air from the fixed nozzle 30 and the conical tube 22 through the connecting tube 31. This causes the sample in the conical tube 22 to be pulled and finally enter the test tube, achieving the purpose of automatic sample extraction. No extractor is needed for sample extraction, reducing operation steps. At the same time, the test tube and sample are easy to put together, avoiding sample drop or contamination and ensuring sample quality.

[0046] During the above process, the reset of the acquisition device and the collection of samples can be carried out simultaneously, which further shortens the sampling cycle and thus further improves the sampling efficiency and completes the operation.

[0047] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A forestry tree sample collection device, characterized by, The utility model provides a kind of positioning frame, the side wall of the positioning frame (1) is fixedly connected with handle (2), and the inner bottom surface of positioning frame (1) is installed with pull wire device (3), the winding shaft of pull wire device (3) is fixedly connected with crank (4), and pull rope (5) is wound on the winding shaft of pull wire device (3), the inner bottom surface of the positioning frame (1) is fixedly connected with first support (6) and second support (7), the input shaft (8) is rotatably sleeved on the first support (6), one end of the input shaft (8) is fixedly connected with embedded wheel (9), the other end of the input shaft (8) is fixedly connected with first driving gear (10), the outer surface of first driving gear (10) is engagedly connected with first gear shift gear (11), the central axis of first gear shift gear (11) is fixedly connected with first rotating shaft (12), the end of first rotating shaft (12) is fixedly connected with first coaxial gear (13), the outer surface of first coaxial gear (13) is engagedly connected with second gear shift gear (14), the central axis of second gear shift gear (14) is fixedly connected with second rotating shaft (15), the end of second rotating shaft (15) is fixedly connected with second coaxial gear (16), the outer surface of second coaxial gear (16) is engagedly connected with driven gear (17), the central axis of driven gear (17) is fixedly connected with screw rod (18), one end of the outer surface of screw rod (18) is engagedly sleeved with baffle (19), the other end of baffle (19) is sleeved with guide rod (20), the bottom surface of the positioning frame (1) is installed with pulley (21).

2. A forestry tree sample collection device according to claim 1, characterised in that: Pull rope (5) is engagedly sleeved with embedded wheel (9), pull rope (5) is slidably sleeved with positioning frame (1), and pull rope (5) is slidably sleeved with pulley (21), first rotating shaft (12) is rotatably connected with second support (7), second rotating shaft (15) is rotatably connected with second support (7), screw rod (18) is sleeved with second support (7), and second support (7) is arranged in L shape.

3. A forestry tree sample collection device according to claim 1, wherein: The screw pitch of the screw rod (18) is the number of teeth of the first driving gear (10) is the number of teeth of the first transmission gear (11) is the number of teeth of the first coaxial gear (13) is the number of teeth of the second transmission gear (14) is the number of teeth of the second coaxial gear (16) is the number of teeth of the driven gear (17) is the rotation speed of the input shaft (8) is times the rotation speed of the screw rod (18).

4. A forestry tree sample collection device according to claim 1, wherein: Guide rod (20) is fixedly connected with the side wall of positioning frame (1), handle (2) is provided with two, and two handles (2) are symmetrically arranged about the bisector surface of baffle (19).

5. A forestry tree sample collection device according to claim 1, wherein: Baffle (19) is sleeved with taper pipe (22), one end of taper pipe (22) is provided with embedded groove (23), the other end of taper pipe (22) is fixedly connected with external thread (24), the outer surface of external thread (24) is engagedly sleeved with positioning frame (1), the inner wall of baffle (19) is provided with inner cavity (25), and motor (26) is installed on the side wall of baffle (19), the output end of motor (26) is fixedly connected with second driving gear (27), the outer surface of second driving gear (27) is engagedly connected with transmission gear (28), and the inner surface of transmission gear (28) is fixedly connected with embedded block (29).

6. A forestry tree sample collection device according to claim 5, wherein: Embedded groove (23) is engagedly connected with embedded block (29), taper pipe (22) can penetrate positioning frame (1), and second driving gear (27) and transmission gear (28) are located in inner cavity (25).

7. A forestry tree sample collection device according to claim 5, wherein: The end of the taper pipe (22) is rotationally connected with a fixed nozzle (30), the outer surface of the fixed nozzle (30) is communicated with one end of a connecting pipe (31), the other end of the connecting pipe (31) is communicated with a fixed cylinder (32), the fixed cylinder (32) is slidably sleeved with a multi-stage piston rod (33), the multi-stage piston rod (33) is slidably sleeved with a fixed piston rod (34), the end of the fixed piston rod (34) is fixedly connected with the fixed nozzle (30), the inner surface of the taper pipe (22) is provided with a groove (35), the groove (35) is rotationally connected with a clamping block (36), the clamping block (36) and the groove (35) are fixedly connected with a reset spring (37).

8. A forestry tree sample collection device according to claim 7, characterised in that: The end of the fixed nozzle (30) can be engaged with a test tube, the fixed cylinder (32) is fixedly connected with a baffle (19), the diameter of the multi-stage piston rod (33) gradually decreases, the clamping block (36) is sleeved with the groove (35), and the side surface of the clamping block (36) is an arc surface, the groove (35) limits the clockwise rotation of the clamping block (36), and the length of the clamping block (36) is greater than the inner radius of the taper pipe (22).

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