Forestry tree age investigation device and sampling method

Abstract

The invention relates to the technical field of forestry investigation, and discloses a forestry tree age investigation device and a sampling method.The forestry tree age investigation device comprises a growth cone and further comprises a positioning frame and a fixing frame used for erecting the growth cone; the positioning frame comprises a first positioning block, a second positioning block, two supporting plates, two cross rods and a fixing rope; the end parts of the two supporting plates are rotationally connected with each other; the two cross rods are used for bearing the first positioning block and the second positioning block respectively; the fixing rope is used for tensioning the first positioning block and the second positioning block; the fixing frame is installed on the first positioning block, the second positioning block is provided with a tightener for tensioning the fixing rope, and the two transverse rods are parallel to each other on the same horizontal plane and are perpendicular to the supporting plate. The method has the advantages that the accuracy of tree age investigation is improved, standardized sampling is realized, and a complete tree core sample is taken out.

Description

Technical Field

[0001] The invention belongs to the technical field of forestry investigation, and in particular relates to a forestry tree age investigation device and a sampling method. Background Art

[0002] Tree age refers to the age of a tree, usually based on annual rings. "Annual rings refer to the growth layers of wood and bark seen on the cross section of a stem within one year." This is the definition of the term "annual ring" in the "Terminology of Wood Anatomy" published by the International Association of Wood Anatomists in 1957; and currently, the calculation of the age of living trees by staff usually uses tree growth cones to drill cores from the trunks, and then estimates the actual age of the trees based on the number of annual rings on the cores.

[0003] However, currently, when sampling trees, most people directly use growth cones for drilling. This method has some limitations. First, due to the different shapes of tree trunks, the center of their annual rings is often close to the connecting line of the tangent points at the thickest part of the trunk, which can easily lead to the sampling position being far away from the center of the annual ring, resulting in incomplete sample information. This may affect the accuracy of tree age estimation, especially for older trees or trees with irregular growth; secondly, the direct use of growth cones for sampling lacks precise positioning and fixing devices, which may cause the angle of the growth cone to be unstable during the sampling process, affecting the quality and consistency of the samples; thirdly, the existing sampling methods lack standardization and repeatability. Different operators may use different sampling locations and methods, which will reduce the comparability of the data and affect the reliability of forestry survey results.

[0004] In view of this, the inventor conducted in-depth research on the above-mentioned defects in the prior art, and thus came up with this case. Summary of the invention

[0005] The purpose of the present invention is to provide a forestry tree age survey device and a sampling method, which have the advantages of improving the accuracy of tree age survey, realizing standardized sampling, and taking out complete tree core samples.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A forestry tree age survey device comprises a growth cone, a positioning frame and a fixing frame for erecting the growth cone; the positioning frame comprises a first positioning block, a second positioning block, two support plates with mutually rotatably connected ends, two cross bars respectively carrying the first positioning block and the second positioning block, and a fixing rope for tightening the first positioning block and the second fixing block; the fixing frame is installed on the first positioning block, the second positioning block is provided with a tensioner for tightening the fixing rope, the two cross bars are parallel to each other on the same horizontal plane and perpendicular to the supporting plate; a first movable cavity is formed on a side of the first positioning block close to the trunk, a first roller is provided in the first movable cavity, a second movable cavity is formed on a side of the second positioning block close to the trunk, a second roller is provided in the second movable cavity; the tensioner is movably arranged on a side of the second positioning block away from the trunk, a through groove communicating with the second movable cavity is formed on a side of the second positioning block away from the trunk, and a plug rod passing through the through groove and plugged with the second roller is provided on the tensioner; the fixing rope can be passed through the first roller, and both ends of the fixing rope are connected to the tensioner.

[0008] Furthermore, the first moving cavity has first rolling grooves formed on the inner top wall and the inner bottom wall, and the first roller has first bearings matched with the first rolling grooves at the upper and lower ends; the second moving cavity has second rolling grooves formed on the inner top wall and the inner bottom wall, and the second roller has second bearings matched with the second rolling grooves at the upper and lower ends. By providing the first bearings at the upper and lower ends of the first roller and the second bearings at the upper and lower ends of the second roller, the movement of the first roller and the second roller can be made smoother, thereby improving the positioning accuracy of the growth cone on the tree trunk.

[0009] Furthermore, a plug-in hole connected to the plug rod is formed on the side of the second roller close to the tensioner; a limiting groove is formed on the side of the second roller close to the tree trunk, and a limiting strip slidably matched with the limiting groove is formed in the second cavity. The tensioner and the second roller are connected through the plug rod and the plug-in hole, so that the tensioner and the second roller can move synchronously. In addition, the cooperation between the limiting groove and the limiting strip can prevent the second roller from rotating, so that the plug-in hole is always facing the plug rod, which is convenient for installing and connecting the tensioner.

[0010] Furthermore, the tensioner includes a take-up frame and a take-up wheel, the take-up wheel is rotatably connected to the inner wall of the take-up frame, the insertion rod is fixedly connected to the side of the take-up frame close to the second positioning block; a plurality of balls are provided on the side of the take-up frame close to the second positioning block, and first through holes are formed on both sides of the take-up frame for the two ends of the fixed rope to pass through; the take-up wheel is provided with two second through holes for the two ends of the fixed rope to pass through. The tensioner is used to effectively tighten the fixed rope, thereby fixing the first positioning block and the second positioning block at the widest part of the trunk, and the balls can also facilitate the tensioner to follow the second roller to move laterally to adjust the position.

[0011] Furthermore, the take-up wheel is provided with a ratchet wheel, the ratchet wheel is close to the inner wall of the take-up frame, and the inner wall of the take-up frame is provided with a ratchet wheel that cooperates with the ratchet wheel; a rocker is provided at one end of the take-up wheel, and a handle is provided on the outer wall of the take-up frame. The ratchet wheel and the ratchet wheel on the take-up wheel cooperate with each other to effectively prevent the fixing rope from loosening during the take-up process, thereby improving the stability of the fixing rope.

[0012] Further, the fixing frame includes a mounting member movably connected to the first positioning block and a support member detachably connected to the mounting member; the first positioning block is formed with a mounting groove penetrating the upper surface and the lower surface of the first positioning block; the mounting member includes a first mounting block slidably matched with the mounting groove, a second mounting block located on the side of the first positioning block away from the trunk, and a third mounting block connected to the top of the first mounting block and the second mounting block; the support member includes a first supporting block slidably connected to the top of the third mounting block, a diagonal support plate inclined upwardly arranged on the first supporting block, and a second supporting block arranged on the top of the diagonal support plate, the top of the second supporting block is formed with a first limiting guide groove slidably matched with the sampling tube of the growth cone, one side of the second supporting block is also hinged with a fixed cover plate, and the bottom of the fixed cover plate is formed with a second limiting guide groove slidably matched with the sampling tube of the growth cone. The fixing frame can better provide support for the growth cone, ensuring that the angle remains stable when drilling the tree core sample, and the sample taken out is more complete.

[0013] Furthermore, a mounting groove for the first support block is formed at the top of the third mounting block, and a mounting slider that slidably cooperates with the mounting groove is formed at the bottom of the first support block. The cooperation between the mounting slider and the mounting groove enables the first support block to be stably and smoothly mounted on the third mounting block, thereby ensuring that the growth cone can be accurately positioned and operated when in use.

[0014] Furthermore, the fixing frame also includes a limit assembly installed at the lower part of the second mounting block, the height of the limit assembly is lower than the height of the lower surface of the first positioning block; the limit assembly includes two internal threaded sleeves respectively located on both sides of the second mounting block, a limit rod threadedly connected in the internal threaded sleeves, and a connecting shaft connected between the two internal threaded sleeves, the connecting shaft is rotatably connected to the second mounting block; a fixing cone is formed at one end of the limit rod close to the tree trunk. The limit assembly can prevent the entire fixing frame from flipping downward and cannot move left and right, making the fixing frame more stable.

[0015] Furthermore, the positioning frame also includes a support rod, the top end of which is provided with a mounting chuck for mounting the support plate, the mounting chuck is rotatably connected with an adjustment shaft for adjusting the extrusion force between the two support plates; a connecting block rotatably connected to the adjustment shaft is provided at the connection between the two support plates, the adjustment shaft is provided with an extrusion plate in contact with one of the connecting blocks; a threaded hole is formed on one side wall of the mounting chuck, the adjustment shaft is provided with a threaded section and a knob that cooperate with the threaded hole. The extrusion force between the support plates can be effectively adjusted by the adjustment shaft, thereby ensuring that the positioning frame can adapt to the shapes of different tree trunks, ensuring the accurate positioning of the center of the annual ring during the sampling process, and thus ensuring the integrity and accuracy of the sampling information.

[0016] A forestry tree age survey sampling method comprises the following steps:

[0017] S1: Assemble the positioning frame, install the two cross bars on the two support plates respectively, and pass the first positioning block and the second positioning block through the two cross bars;

[0018] S2: Rotate and separate the two support plates (), and initially fit the first positioning block and the second positioning block to the tree trunk;

[0019] S3: The hand-held positioning piece is rotated around the tree trunk for at least 100 degrees and then rotated back, until the first positioning block and the second positioning block are in contact with the tree trunk again, and the adjusting shaft is rotated to fix the two support plates;

[0020] S4: Install the tensioner on the second positioning block, connect the two ends of the fixing rope to the take-up wheel of the tensioner, and take up the rope, so that the first positioning block and the second positioning block are fixed at the widest part of the trunk. At this time, the first roller and the second roller are at the tangent point of the widest part of the trunk;

[0021] S5: installing the fixing frame on the first positioning block, and adjusting the position of the fixing frame so that the first limiting guide groove and the second limiting guide groove are aligned with the first roller;

[0022] S6: The growth cone is mounted in the first limiting guide groove and the second limiting guide groove of the fixed frame, and starts to rotate and push toward the tree trunk, so as to take out the tree core.

[0023] After adopting the above structure, the present invention relates to a forestry tree age survey device and a sampling method thereof. Compared with the prior art, the present invention accurately locates the intersection point of the widest part of the trunk through a positioning frame, uses a tensioner to fix the first positioning block and the second positioning block on the trunk, and then installs the fixing frame on the first positioning block, and sets the growth cone on the fixing frame for sampling. In this way, the integrity of the drilled tree core sample can be ensured, the accuracy of the tree age survey can be improved, and standardized sampling can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the first positioning block in the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the fixing frame in the present invention;

[0028] Figure 4 It is a structural schematic diagram of the second positioning block in the present invention;

[0029] Figure 5 for Figure 4 Schematic diagram from another angle;

[0030] Figure 6 is a schematic structural diagram of the second roller in the present invention;

[0031] Figure 7 It is a structural schematic diagram of the tensioner in the present invention;

[0032] Figure 8 It is a structural schematic diagram of the support plate in the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure of the adjusting shaft in the present invention.

[0034] The main component symbols are described as follows: growth cone 1, positioning frame 2, first positioning block 21, first active cavity 211, first rolling groove 2111, first roller 212, mounting groove 213, first bearing 2121, second positioning block 22, second active cavity 221, second rolling groove 2211, limiting strip 2212, second roller 222, second bearing 2221, plug hole 2222, limiting groove 2223, through groove 223, support plate 23, connecting block 231, cross bar 24, fixing rope 25, support rod 26, mounting chuck 261, adjusting shaft 27, extrusion plate 271, threaded section 272, knob 273, fixing frame 3, mounting Mounting part 31, first mounting block 311, second mounting block 312, third mounting block 313, mounting slide groove 3131, supporting part 32, first supporting block 321, mounting slide block 3211, diagonal support plate 322, second supporting block 323, first limiting guide groove 3231, fixed cover plate 324, second limiting guide groove 3241, limiting assembly 33, threaded sleeve 331, limiting rod 332, fixed cone 3321, connecting shaft 333, tensioner 4, plug rod 41, take-up frame 42, first through hole 421, ratchet 422, handle 423, take-up wheel 43, second through hole 431, ratchet 432, rocker 433, ball 44. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that in the drawings or descriptions of the specification, similar or identical parts use the same figure numbers, and the implementation methods not shown or described in the drawings are forms known to ordinary technicians in the relevant technical field. In addition, the directional terms mentioned in the embodiments, such as "upper", "lower", "top", "bottom", "left", "right", "front", "back", etc., are only referenced to the directions of the drawings and are not used to limit the scope of protection of the present invention.

[0036] like Figures 1 to 9As shown, a forestry tree age survey device involved in the present invention comprises a growth cone 1, a positioning frame 2 and a fixing frame 3 for setting up the growth cone 1; the positioning frame 2 and the fixing frame 3 can be used to sample the growth cone 1 at the tangent point of the widest part of the trunk, specifically, the positioning frame 2 comprises a first positioning block 21, a second positioning block 22, a support plate 23 with two ends rotatably connected to each other, two cross bars 24 respectively carrying the first positioning block 21 and the second positioning block 22, and a fixing rope 25 for tightening the first positioning block 21 and the second fixing block; the two support plates 23 are in a "V" shape with each other, the fixing frame 3 is installed on the first positioning block 21, and the second positioning block 22 is provided with a tensioner 4 for tightening the fixing rope 25, and the fixing can be a steel wire rope, the two cross bars 24 are parallel to each other on the same horizontal plane, and are perpendicular to the support plate 23, and the other two cross bars 24 can be detachably connected to the support plate 23 by threads; the first positioning block 21 and the second positioning block 22 are both formed with mounting holes that penetrate the cross bars 24, and a mounting hole is provided in the mounting hole There is a rubber sleeve, which can tightly wrap the cross bar 24 to prevent the first positioning block 21 and the second positioning block 22 from sliding on the cross bar 24 when rotating and positioning to find the widest point; the first positioning block 21 forms a first movable cavity 211 on the side close to the trunk, and a first roller 212 is arranged in the first movable cavity 211; the second positioning block 22 forms a second movable cavity 221 on the side close to the trunk, and a second roller 222 is arranged in the second movable cavity 221; the tensioner 4 is movably arranged on the second positioning block 22 away from the trunk On one side, a through groove 223 communicating with the second active cavity 221 is formed on the side of the second positioning block 22 away from the trunk, and a plug rod 41 passing through the through groove 223 and plugged into the second roller 222 is provided on the tensioner 4; the fixing rope 25 can be passed through the first roller 212, and both ends of the fixing rope 25 are connected to the tensioner 4. When the first positioning block 21 and the second positioning block 22 are tightened by the tensioner 4, the first roller 212 and the second roller 222 can be adaptively moved to the tangent point corresponding to the widest part of the trunk.

[0037] In order to make the first roller 212 and the second roller 222 move more smoothly and improve the positioning accuracy of the growth cone 1 on the trunk, a first rolling groove 2111 is formed on the inner top wall and the inner bottom wall of the first active cavity 211, and the upper and lower ends of the first roller 212 are respectively provided with first bearings 2121 that match the two first rolling grooves 2111; the second rolling groove 2211 is formed on the inner top wall and the inner bottom wall of the second active cavity 221, and the upper and lower ends of the second roller 222 are respectively provided with second bearings 2221 that match the two second rolling grooves 2211. The first rolling groove 2111 and the second rolling groove 2211 can be manufactured in different ways, for example, they can be directly formed on the inner top wall and the inner bottom wall of the active cavity by mechanical processing, or they can be realized by embedding a prefabricated rolling groove into the inner wall of the active cavity. The first bearing 2121 and the second bearing 2221 can use different types of bearings, such as ball bearings or needle bearings, and the specific selection can be determined according to actual use requirements. The first roller 212 and the second roller 222 may be made of high-strength steel or other wear-resistant materials to ensure durability and stability during use.

[0038] When the tensioner 4 is used to tighten and fix the first positioning block 21 and the second positioning block 22, the tensioner 4 needs to move with the second roller 222. The second roller 222 is formed with a plug hole 2222 connected to the plug rod 41 on the side close to the tensioner 4; the second roller 222 is formed with a limit groove 2223 on the side close to the tree trunk, and a limit bar 2212 is formed in the second cavity to slide with the limit groove 2223. In addition, the cooperation between the limit groove 2223 and the limit bar 2212 can prevent the second roller 222 from rotating, so that the plug hole 2222 is always facing the plug rod 41, which is convenient for installing and connecting the tensioner 4.

[0039] In this embodiment, the tensioner 4 includes a take-up frame 42 and a take-up wheel 43. The take-up wheel 43 is rotatably connected to the inner wall of the take-up frame 42. The insertion rod 41 is fixedly connected to the side of the take-up frame 42 close to the second positioning block 22. A plurality of balls 44 are provided on the side of the take-up frame 42 close to the second positioning block 22. The balls 44 are in rolling contact with the second positioning block 22. First through holes 421 for the two ends of the fixing rope 25 to pass through are formed on both sides of the take-up frame 42. The take-up wheel 43 is provided with two second through holes 431 for the two ends of the fixing rope 25 to pass through. The tensioner 4 is used to effectively tighten the fixing rope 25, thereby fixing the first positioning block 21 and the second positioning block 22 at the widest part of the trunk. When the tensioner 4 is in the process of continuously taking up the wire, the squeezing force between the tensioner 4 and the second positioning block 22 becomes larger and larger. The balls 44 can facilitate the tensioner 4 to follow the second roller 222 to move laterally and adjust the position.

[0040] Specifically, the take-up wheel 43 is also provided with a ratchet 432, the ratchet 432 is close to the inner wall of the take-up frame 42, and a ratchet 422 cooperating with the ratchet 432 is provided on the inner wall of the take-up frame 42; a rocker 433 is provided at one end of the take-up wheel 43, and a handle 423 is provided on the outer wall of the take-up frame 42. The ratchet 432 and the ratchet 422 on the take-up wheel 43 cooperate with each other to effectively prevent the fixing rope 25 from getting loose during the take-up process, thereby improving the stability of the fixing rope 25. The setting of the rocker 433 makes the take-up operation more convenient and efficient, and the setting of the handle 423 makes it easier for the operator to hold and control the entire take-up process.

[0041] In this embodiment, the fixing frame 3 includes a mounting member 31 movably connected to the first positioning block 21 and a support member 32 detachably connected to the mounting member 31; the first positioning block 21 is formed with a mounting groove 213 penetrating the upper surface and the lower surface of the first positioning block 21. The mounting member 31 includes a first mounting block 311 slidably matched with the mounting groove 213, a second mounting block 312 located on the side of the first positioning block 21 away from the trunk, and a third mounting block 313 connected to the top of the first mounting block 311 and the second mounting block 312; the support member 32 includes a mounting groove 213 slidably connected to the top of the third mounting block 313 The first support block 321 of the upper part, the diagonal support plate 322 inclined upwardly arranged on the first support block 321 and the second support block 323 arranged on the top of the diagonal support plate 322, the top of the second support block 323 is formed with a first limiting guide groove 3231 that slides with the sampling tube of the growth cone 1, one side of the second support block 323 is also hinged with a fixed cover plate 324, the bottom of the fixed cover plate 324 is formed with a second limiting guide groove 3241 that slides with the sampling tube of the growth cone 1, and the other side of the fixed cover plate 324 is fixed to the second support block 323 by means of a clamping or bolt connection. The use of the fixing frame 3 can better provide support for the growth cone 1, ensure that the angle remains stable when drilling the tree core sample, and the sample taken out is more complete, and effectively solve the problem of convenient disassembly and assembly of the fixing frame 3 and the first positioning block 21. When in use, after installing the fixing frame 3, the sampling tube of the growth cone 1 is placed in the first limiting guide groove 3231, and then the fixed cover 324 is covered to cover the sampling tube and provide a guide for the sampling tube body to keep the angle of the sampling tube stable. When the sampling tube has drilled to a sufficient depth, you can choose whether to open the fixed cover 324 according to the actual situation and remove the entire support member 32 so that the growth cone 1 can continue to drill inward to take samples.

[0042] Preferably, a mounting groove 3131 for the first support block 321 is formed at the top of the third mounting block 313, and a mounting slider 3211 slidably matched with the mounting groove 3131 is formed at the bottom of the first support block 321. The first support block 321 can be stably and smoothly mounted on the third mounting block 313 through the matching of the mounting slider 3211 and the mounting groove 3131, thereby ensuring that the growth cone 1 can be accurately positioned and operated when in use. In addition, the mounting groove 3131 is formed as a "T"-shaped groove.

[0043] When drilling tree core samples, it is necessary to continuously rotate the growth cone 1. In order to further improve the stability of the fixing frame 3 and prevent the fixing frame 3 from rotating downward and being unable to move left and right, the fixing frame 3 also includes a limiting component 33 installed at the lower part of the second mounting block 312. The height of the limiting component 33 is lower than the height of the lower surface of the first positioning block 21; the limiting component 33 includes two internal threaded sleeves 331 respectively located on both sides of the second mounting block 312, a limiting rod 332 threadedly connected in the internal threaded sleeve 331, and a connecting shaft 333 connected between the two internal threaded sleeves 331. The connecting shaft 333 is rotatably connected to the second mounting block 312. The fit between the connecting shaft 333 and the second mounting block 312 is relatively tight, and a certain force is required for rotation to occur; a fixing cone 3321 is formed at one end of the limiting rod 332 close to the trunk. During the specific operation, after the position of the fixing frame 3 is determined, the connecting shaft 333 is rotated to make the fixing cone 3321 face the tree trunk vertically, and then the limiting rod 332 is twisted to make the fixing cone 3321 contact the top of the tree trunk as much as possible.

[0044] In this embodiment, the positioning frame 2 also includes a support rod 26, the height of the support rod 26 is about 1.3 meters, which is located at the diameter of the trunk at breast height, so that the sampling height is also at this height. A mounting chuck 261 for mounting the support plate 23 is provided at the top of the support rod 26. The mounting chuck 261 has a connecting plate connected to the support rod 26 and two limit plates, and the whole is a "U"-shaped structure. An adjusting shaft 27 for adjusting the squeezing force between the two support plates 23 is rotatably connected to the mounting chuck 261; a connecting block 231 rotatably connected to the adjusting shaft 27 is provided at the connection between the two support plates 23, the connecting block 231 is located between the two limit plates, and a rubber pad is provided between the two connecting blocks 231, and an extrusion plate 271 in contact with one of the connecting blocks 231 is provided on the adjusting shaft 27; a threaded hole is formed on one side wall of the mounting chuck 261, and a threaded section 272 and a knob 273 cooperating with a section of the threaded hole are provided on the adjusting shaft 27. The squeezing force between the support plates 23 can be effectively adjusted by rotating the adjustment shaft 27, thereby ensuring that the positioning frame 2 can adapt to the shapes of different tree trunks and ensure accurate positioning of the center of the annual ring during the sampling process, thereby ensuring the integrity and accuracy of the sampling information.

[0045] A forestry tree age survey sampling method comprises the following steps:

[0046] S1: Assemble the positioning frame 2, install the two cross bars 24 on the two support plates 23 respectively, and penetrate the first positioning block 21 and the second positioning block 22 on the two cross bars 24;

[0047] S2: Rotate and separate the two support plates 23 (), and initially fit the first positioning block 21 and the second positioning block 22 to the tree trunk;

[0048] S3: The hand-held positioning piece is rotated around the tree trunk for at least 100 degrees and then rotated back, until the first positioning block 21 and the second positioning block 22 are in contact with the tree trunk again, and the adjusting shaft 27 is rotated to fix the two support plates 23;

[0049] S4: Install the tensioner 4 on the second positioning block 22, and connect the two ends of the fixing rope 25 to the take-up wheel 43 of the tensioner 4 to take up the line, so that the first positioning block 21 and the second positioning block 22 are fixed at the widest part of the trunk. At this time, the first roller 212 and the second roller 222 are at the tangent point of the widest part of the trunk;

[0050] S5: Install the fixing frame 3 on the first positioning block 21, and adjust the position of the fixing frame 3 so that the first limiting guide groove 3231 and the second limiting guide groove 3241 are aligned with the first roller 212;

[0051] S6: The growth cone 1 is placed in the first limiting guide groove 3231 and the second limiting guide groove 3241 of the fixing frame 3, and starts to rotate and push toward the tree trunk, so as to take out the tree core.

[0052] By assembling the positioning frame 2 and adjusting the fixing frame 3, the positioning block is ensured to fit the tree trunk, so as to accurately determine the sampling position. By utilizing the take-up mechanism of the tensioner 4 and the fixing rope 25, the positioning block is fixed at the widest part of the tree trunk, ensuring the accurate positioning of the growth cone 1 during sampling, and finally achieving effective sampling of the tree core, thereby solving the problem of incomplete sample information caused by inaccurate sampling position.

[0053] The above is a detailed introduction to a forestry tree age survey device provided by the present invention. The description of the specific embodiment is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A forestry tree age survey device, comprising a growth cone (1), characterized in that: It also comprises a positioning frame (2) and a fixing frame (3) for erecting the growth cone (1); the positioning frame (2) comprises a first positioning block (21), a second positioning block (22), a support plate (23) with two ends rotatably connected to each other, two cross bars (24) respectively carrying the first positioning block (21) and the second positioning block (22), and a fixing rope (25) for tightening the first positioning block (21) and the second fixing block (22); the fixing frame (3) is mounted on the first positioning block (21), the second positioning block (22) is provided with a tensioner (4) for tightening the fixing rope (25), the two cross bars (24) are parallel to each other on the same horizontal plane, and are perpendicular to the support plate (23); the first positioning block (21) is formed on one side close to the trunk A first movable cavity (211) is formed, a first roller (212) is arranged in the first movable cavity (211), a second movable cavity (221) is formed on a side of the second positioning block (22) close to the tree trunk, a second roller (222) is arranged in the second movable cavity (221); the tensioner (4) is movably arranged on a side of the second positioning block (22) away from the tree trunk, a through groove (223) communicating with the second movable cavity (221) is formed on the side of the second positioning block (22) away from the tree trunk, and an insertion rod (41) passing through the through groove (223) and plugging with the second roller (222) is arranged on the tensioner (4); the fixing rope (25) can be passed through the first roller (212), and both ends of the fixing rope (25) are connected to the tensioner (4).

2. A forestry tree age survey device according to claim 1, characterized in that: A first rolling groove (2111) is formed on the inner top wall and the inner bottom wall of the first movable cavity (211), and a first bearing (2121) matching with the two first rolling grooves (2111) is respectively provided at the upper and lower ends of the first roller (212); a second rolling groove (2211) is formed on the inner top wall and the inner bottom wall of the second movable cavity (221), and a second bearing (2221) matching with the two second rolling grooves (2211) is respectively provided at the upper and lower ends of the second roller (222).

3. A forestry tree age survey device according to claim 2, characterized in that: A plug hole (2222) connected to the plug rod (41) is formed on a side of the second roller (222) close to the tensioner (4); a limiting groove (2223) is formed on a side of the second roller (222) close to the tree trunk, and a limiting strip (2212) slidably matched with the limiting groove (2223) is formed in the second cavity (221).

4. A forestry tree age survey device according to claim 3, characterized in that: The wire tensioner (4) comprises a wire take-up frame (42) and a wire take-up wheel (43), wherein the wire take-up wheel (43) is rotatably connected to the inner wall of the wire take-up frame (42), and the insertion rod (41) is fixedly connected to a side of the wire take-up frame (42) close to the second positioning block (22); a plurality of balls (44) are provided on a side of the wire take-up frame (42) close to the second positioning block (22), and first through holes (421) are formed on both sides of the wire take-up frame (42) for the two ends of the fixing rope (25) to pass through; and two second through holes (431) are provided on the wire take-up wheel (43) for the two ends of the fixing rope (25) to pass through.

5. A forestry tree age survey device according to claim 4, characterized in that: The wire-receiving wheel (43) is also provided with a ratchet (432), the ratchet (432) is close to the inner wall of the wire-receiving frame (42), and the inner wall of the wire-receiving frame (42) is provided with a ratchet pawl (422) cooperating with the ratchet (432); a rocker (433) is provided at one end of the wire-receiving wheel (43), and a handle (423) is provided on the outer wall of the wire-receiving frame (42).

6. The forestry tree age survey device according to claim 1, characterized in that: The fixing frame (3) comprises a mounting member (31) movably connected to the first positioning block (21) and a supporting member (32) detachably connected to the mounting member (31); a mounting groove (213) penetrating the upper surface and the lower surface of the first positioning block (21) is formed on the first positioning block (21); the mounting member (31) comprises a first mounting block (311) slidably matched with the mounting groove (213), a second mounting block (312) located on a side of the first positioning block (21) away from the tree trunk, and a third mounting block (313) connected to the top of the first mounting block (311) and the second mounting block (312); the supporting member ( 32) comprises a first support block (321) slidably connected to the top of the third mounting block (313), a diagonal support plate (322) arranged obliquely upward on the first support block (321), and a second support block (323) arranged on the top of the diagonal support plate (322), the top of the second support block (323) is formed with a first limiting guide groove (3231) which is slidably matched with the sampling tube of the growth cone (1), one side of the second support block (323) is also hinged with a fixed cover plate (324), and the bottom of the fixed cover plate (324) is formed with a second limiting guide groove (3241) which is slidably matched with the sampling tube of the growth cone (1).

7. A forestry tree age survey device according to claim 6, characterized in that: The top of the third mounting block (313) is formed with a mounting groove (3131) for the first supporting block (321), and the bottom of the first supporting block (321) is formed with a mounting sliding block (3211) that slidably cooperates with the mounting groove (3131).

8. A forestry tree age survey device according to claim 7, characterized in that: The fixing frame (3) further comprises a limiting assembly (33) mounted on the lower part of the second mounting block (312), wherein the height of the limiting assembly (33) is lower than the height of the lower surface of the first positioning block (21); the limiting assembly (33) comprises two internal threaded sleeves (331) respectively located on both sides of the second mounting block (312), a limiting rod (332) threadedly connected in the internal threaded sleeves (331), and a connecting shaft (333) connected between the two internal threaded sleeves (331), wherein the connecting shaft (333) is rotatably connected to the second mounting block (312); a fixing cone (3321) is formed at one end of the limiting rod (332) close to the tree trunk.

9. The forestry tree age survey device according to claim 1, characterized in that: The positioning frame (2) also includes a support rod (26), the top end of which is provided with a mounting chuck (261) for mounting the support plate (23), and the mounting chuck (261) is rotatably connected with an adjustment shaft (27) for adjusting the extrusion force between the two support plates (23); a connecting block (231) rotatably connected to the adjustment shaft (27) is provided at the connection between the two support plates, and the adjustment shaft (27) is provided with an extrusion plate (271) in contact with one of the connecting blocks (231); a threaded hole is formed on one side wall of the mounting chuck (261), and the adjustment shaft (27) is provided with a threaded section (272) and a knob (273) that cooperate with the threaded hole.

10. A forestry tree age survey sampling method, using the forestry tree age survey device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Assemble the positioning frame, install the two cross bars (24) on the two support plates (23) respectively, and pass the first positioning block (21) and the second positioning block (22) through the two cross bars (24); S2: rotating and separating the two support plates (23), and initially placing the first positioning block (21) and the second positioning block (22) close to the tree trunk; S3: The hand-held positioning piece is rotated at least 180° around the tree trunk and then rotated back, until the first positioning block (21) and the second positioning block (2) are in contact with the tree trunk again, and the adjustment shaft (27) is rotated to fix the two support plates (23); S4: The tensioner (4) is installed on the second positioning block (22), and the two ends of the fixing rope (25) are connected to the take-up wheel (43) of the tensioner (4) to take up the rope, thereby fixing the first positioning block (21) and the second positioning block (22) at the widest part of the tree trunk. At this time, the first roller (212) and the second roller (222) are at the tangent point of the widest part of the tree trunk; S5: installing the fixing frame (3) on the first positioning block (21), and adjusting the position of the fixing frame (3) so that the first limiting guide groove (3231) and the second limiting guide groove (3241) are aligned with the first roller (212); S6: The growth cone (1) is placed in the first limiting guide groove (3231) and the second limiting guide groove (3241) of the fixing frame (3), and begins to rotate and push toward the tree trunk, thereby removing the tree core.

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