Handheld portable biomass sampling machine

Abstract

The invention relates to the technical field of biomass sampling equipment, in particular to a handheld portable biomass sampling machine which adopts a claw-shaped sampling head after being closed, can reduce the difficulty of being inserted into a biomass pile, adopts a length-adjustable supporting rod to adapt to sampling at different depths, and is detachable so as to be convenient to carry. The detachable electric power device is adopted, and the two melon shells of the sampling head are driven by the screw rod to be automatically opened and closed, so that the sampling intensity is reduced, and the sampling efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of biomass sampling equipment technology, and in particular to a handheld portable biomass sampler. Background Technology

[0002] Sampling and analyzing biomass (such as straw, livestock manure, compost, and sawdust) is a fundamental task in fields such as biomass energy development, environmental monitoring, and agricultural scientific research. Accurate and efficient sampling is a prerequisite for ensuring the scientific validity and reliability of subsequent testing data.

[0003] In existing technologies, there are many types of biomass sampling equipment, mainly including manual sampling tools and motorized sampling equipment. Manual sampling tools, such as sampling shovels, sampling spoons, and sampling drills, are simple in structure and low in cost, but they have the following significant drawbacks: 1. Labor-intensive and demanding operation: Especially when dealing with compacted biomass piles or when deep sampling is required, operators need to expend a lot of physical strength, resulting in low work efficiency. 2. Limited sampling depth: The sampling depth of manual tools often depends on the strength of the operator and the length of the tool itself, making it difficult to meet the sampling needs at different depths, especially for the collection of deep biomass. 3. Poor sample representativeness: When operating manually, the insertion angle and force of the sampler are not easy to control, which can easily lead to uneven sampling. In addition, human factors interfere greatly during the sampling process, making it difficult to ensure the uniformity and representativeness of the sampling. In particular, for stratified biomass piles, it is difficult to achieve accurate sampling of specific layers. 4. The sampling process is susceptible to contamination: When operating manually, the hands of the sampling personnel or the outside of the tools may come into contact with the sample, which may introduce external contamination.

[0004] While motorized sampling equipment has alleviated the labor-intensive nature of manual tools to some extent, it is typically bulky, complex in structure, inconvenient to carry, and expensive, making it unsuitable for small-scale sampling operations or complex field environments. Furthermore, some motorized sampling equipment has a simple sampling head design, making it difficult to effectively grasp and retain biomass samples. This can lead to sample scattering during lifting, affecting the sampling volume and integrity, necessitating resampling.

[0005] Therefore, there is an urgent market demand for a biomass sampling device that is easy to operate, allows for flexible adjustment of sampling depth, has a high degree of automation, and can guarantee the sampling volume and representativeness. This device should reduce the workload of operators, improve sampling efficiency, prevent sample scattering, and be adaptable to the sampling needs of different types of biomass piles. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a handheld portable biomass sampler. The sampler has a seed-shaped sampling head at the front end, which reduces the difficulty of inserting it into the biomass pile and prevents the sample from scattering. In addition, an electric control mechanism is provided to control the automatic opening and closing of the seed-shaped sampling head, thereby improving sampling efficiency.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: a handheld portable biomass sampler, including a support tube, a sampling head that is shaped like a melon seed when closed is hinged to the front end of the support tube, a power device for driving the opening and closing of the sampling head is provided at the rear end of the support tube, a screw is provided inside the support tube, the rear end of the screw is fixedly connected to the output shaft of the power device, a push plate is threadedly connected to the front end of the screw, the push plate is slidably connected to the support tube, two connecting rods of equal length are hinged to the front end of the push plate, the sampling head is composed of two symmetrical melon shells, the rear ends of the two melon shells are hinged to the support tube, and the inner sidewalls of the two melon shells are respectively hinged to the other ends of the two connecting rods.

[0008] The two halves of the melon shell that make up the sampling head are shaped like sunflower seed shells. When the two halves are put together, they form a melon seed-shaped sampling head with a cavity. In addition, the two halves of the melon shell are symmetrical in shape and size, but in order to avoid interference when they are hinged with the support tube, the hinge ears at the tails of the two halves of the melon shell are staggered.

[0009] Preferably, the front end of the support tube is fitted with a mounting base, and the two are fastened together by screws. The mounting base is a section of round tube, and a sealing plate with a rectangular hole is provided at the front end opening. The push plate passes through the rectangular hole and is slidably connected to the sealing plate. The front end of the mounting base is provided with two ear plates with hinge holes. The hinge holes of the two ear plates are coaxial, and the axis of the hinge holes intersects with the axial plane of the mounting base.

[0010] Preferably, the push plate is a U-shaped plate with a nut at the U-shaped opening that can be threadedly connected to the screw, and a through hole at the arc end of the U-shaped plate that can be hinged to the connecting rod. The U-shaped opening serves as a clearance notch for the screw to pass through the nut, and the pins for mounting the sampling head on the two halves of the melon also pass laterally through the U-shaped opening.

[0011] Preferably, the tail end of the support tube is provided with a plug-in seat to facilitate the insertion and fixing of the power device. The plug-in seat is a rectangular straight tube with rounded ends or rounded or chamfered corners. The side of the plug-in seat is provided with a locking screw to press the power device and fix it.

[0012] Preferably, the power unit includes a power motor and a battery for driving the power motor, and also includes a control device for controlling the start, stop, speed, forward and reverse rotation of the power motor.

[0013] The aforementioned power unit can be designed to resemble the structure and shape of a hand drill. Its front casing is shaped and sized identically to the connector. The casing integrates a geared motor, control circuitry, and battery. The exterior of the casing features buttons for controlling the start and stop of the motor and its rotation speed. It also includes paddles for controlling the forward and reverse rotation of the motor. The forward and reverse rotation of the motor drives the screw to rotate in both directions, thereby propelling the push plate forward or backward, and subsequently controlling the opening and closing of the sampling head via the connecting rod.

[0014] Preferably, a telescopic tube is sleeved inside the support tube, the mounting seat is disposed at the front end of the telescopic tube, the support tube is provided with fastening screws to fasten the telescopic tube and prevent it from sliding, there are at least three fastening screws, all of the fastening screws are located on one circumference of the front end of the support tube, and the telescopic tube is provided with at least one set of locking holes that match the fastening screws, the diameter of the locking holes being equal to that of the fastening screws.

[0015] The above configuration is designed to make the support tube shorter and detachable in two sections. This is to accommodate sampling from biomass piles at different depths and to facilitate disassembly and subsequent packaging and transport. Therefore, other components of the invention, including the power unit and the mounting base connected to the sampling head, are also detachable.

[0016] Preferably, a transmission tube one is rotatably connected inside the telescopic tube via a bearing, the screw is fixed to the front end of the transmission tube one, a transmission tube two is sleeved at the tail end of the transmission tube one, the transmission tube two is slidably connected to the transmission tube one, the transmission tube two and the transmission tube one cannot rotate relative to each other, and the tail end of the transmission tube two is fixedly connected to the output shaft of the power device.

[0017] The above configuration is designed to adapt the support tube into a structure consisting of two adjustable-length support tubes and a telescopic tube. When the telescopic tube slides inside the support tube to adjust the length of the sampler, the second transmission tube can slide along the first transmission tube, thereby automatically adapting to the length.

[0018] Preferably, the first transmission tube and the second transmission tube are square tubes, and the front end of the output shaft of the power device is set as a square shaft, the side length of which is equal to the side length of the inner tube of the second transmission tube.

[0019] Preferably, the front square shaft of the power device is provided with a radial elastic mechanism to prevent the transmission tube from falling off. The radial elastic mechanism is provided in the transverse through hole of the front square shaft of the power device. One end of the hole is provided with a neck and the other end is provided with a thread. The radial elastic mechanism includes a bottom screw, a locking spring and a steel ball.

[0020] Preferably, an anti-detachment spring is provided between the first transmission tube and the second transmission tube. The anti-detachment spring is disposed inside the second transmission tube, and a stop plate is fixed inside the second transmission tube. The two ends of the anti-detachment spring abut against the stop plate and the front end plate of the first transmission tube, respectively. The anti-detachment spring can prevent the second transmission tube from falling into the first transmission tube after it detaches from the power device, thus keeping the second transmission tube engaged with the square shaft of the power device and ensuring stable power transmission.

[0021] The beneficial effects of the present invention are as follows: The handheld portable biomass sampler of the present invention adopts a sampling head that is claw-shaped when closed, which can reduce the difficulty of inserting into the biomass pile. It adopts an adjustable length support rod to adapt to sampling at different depths and is detachable for easy carrying. It adopts a detachable electric power device, which drives the two halves of the sampling head to open and close automatically through a screw, reducing the sampling intensity and improving the sampling efficiency.

[0022] The inventive points of this invention are as follows: 1. Highly Efficient Sampling Chamber Design: The two "sunflower seed" shaped sampling heads form a relatively closed inner cavity when closed. This "sunflower seed" design allows the sampling head to initially close or slightly open to reduce insertion resistance when inserted into the biomass pile. Once the target depth is reached, the control device rotates the motor forward to open the "sunflower seed," allowing surrounding biomass material to enter the opened cavity. Then, the motor reverses to close the "sunflower seed," collecting the biomass sample within the cavity. The closed "sunflower seed" effectively grasps and retains the sample, preventing sample scattering during removal from the pile and ensuring the sampling volume and integrity. This design, combined with automated opening and closing control, ensures the representativeness and effectiveness of the sampling. 2. Electrified and Automated Opening and Closing Mechanism: The core of this invention lies in introducing a motor as the power source, replacing traditional manual operation. Specifically, the output end of the motor is fixedly connected to transmission pipe two, which transmits the rotational motion of the motor to transmission pipe one, which is fitted with it, causing the screw fixed at the front end of transmission pipe one to rotate accordingly. Since the push plate is threadedly connected to the screw via a nut, and the push plate is restricted to sliding axially on the seed mounting base and cannot rotate, the rotational motion of the screw is converted into the axial linear motion of the push plate through the screw-nut mechanism. This axial movement of the push plate is then transmitted to two seeds hinged on the seed mounting base via a linkage mechanism, thereby driving the two seeds to open or close synchronously around the hinge axis. When the motor rotates forward, the screw rotates, pushing the push plate forward and causing the seeds to open via the linkage; when the motor rotates in reverse, the screw rotates in the opposite direction, pulling the push plate backward and causing the seeds to close via the linkage. This innovation achieves automated control of the seed opening and closing action, eliminating the need for manual operation, greatly reducing labor intensity, and improving sampling efficiency. 3. Adjustable-Length Tube Structure: To address the issue of limited sampling depth, this invention designs the main structure of the sampler as a nested support tube and a telescopic tube. The support tube and telescopic tube can slide relative to each other, thereby changing the effective working length of the entire sampler. After adjustment to the desired length, their relative positions are fixed by fastening screws. Complementing this adjustable-length structure, the torque-transmitting transmission tubes one and two also employ a nested structure. The cross-sections of transmission tubes one and two are preferably square (but can also be hexagonal, D-shaped, or other non-circular shapes). They are clearance-fitted, ensuring that when tube two rotates, it drives tube one to rotate synchronously to transmit sufficient torque, while also allowing for axial relative sliding, thus accommodating length adjustments between the support tube and the telescopic tube. This innovation allows users to flexibly adjust the total length of the sampler according to actual sampling needs, easily achieving biomass sampling at different depths and expanding the applicability of the equipment. 4. Detachable assembly structure: The various mechanisms of this invention are connected by fitting and screw locking. When the lock is released, the various mechanisms can be easily disassembled into the following parts: mounting base with sampling head, telescopic tube with transmission tube one and screw, support tube with plug-in base, transmission tube two, power device, anti-detachment spring, etc. The length and volume of these structures are not large, and they can be put into a tool bag for easy carrying, thus facilitating the operation of workers when they go out. Attached Figure Description

[0023] Figure 1 This is the main sectional view of Embodiment 1; Figure 2 This is a 3D exploded view of an adjustable-length sampler; Figure 3 This is the main sectional view of Embodiment 3; Figure 4 This is the main sectional view of Embodiment 4; Figure 5 This is a three-dimensional view of the support tube; Figure 6 This is a front sectional view of the telescopic tube with screw and transmission tube 1; Figure 7 This is a front sectional view of the transmission tube 2 and the anti-disengagement spring; Figure 8 This is a perspective view of the mounting base; Figure 9 This is a three-dimensional view of the push plate; Figure 10 This is a three-dimensional view of one lobe of the sampling head; Figure 11 This is a three-dimensional view of another lobe of the sampling head; Figure 12 yes Figure 4 A magnified view of part A; Figure 13 yes Figure 4 A magnified view of part B; Figure 14 yes Figure 4 A magnified view of a portion of C.

[0024] Explanation of reference numerals in the attached figures: 1—Support tube, 11—Plug-in socket, 12—Locking screw, 13—Fastening screw, 2—Telescopic tube, 3—Mounting base, 31—Sealing plate, 32—Ear plate, 4—Sampling head, 5—Power unit, 51—Radial elastic mechanism, 6—Screw, 7—Push plate, 8—Connecting rod, 9—Transmission tube one, 10—Transmission tube two, 101—Suppressing plate, 20—Anti-detachment spring. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0026] In addition, for ease of explanation, the following embodiments use one end of the sampling machine with the power device 5 as the tail end and one end with the sampling head 4 as the front end.

[0027] Example 1.

[0028] like Figure 1 As shown, a handheld portable biomass sampler of this embodiment includes a support tube 1. A sampling head 4, which is shaped like a melon seed when closed, is hinged to the front end of the support tube 1. A power device 5 for driving the sampling head 4 to open and close is provided at the rear end of the support tube 1. A screw 6 is provided inside the support tube 1. The rear end of the screw 6 is fixedly connected to the output shaft of the power device 5. A push plate 7 is threadedly connected to the front end of the screw 6. The push plate 7 is slidably connected to the support tube 1. Two connecting rods 8 of equal length are hinged to the front end of the push plate 7. The sampling head 4 is composed of two symmetrical melon shells. The rear ends of the two melon shells are hinged to the support tube 1. The inner sidewalls of the two melon shells are respectively hinged to the other ends of the two connecting rods 8.

[0029] The power unit 5 can be customized or modified using an electric drill. Other components are made of stainless steel or aluminum alloy, with aluminum alloy being preferred, to reduce the weight of the sampler.

[0030] The support tube 1 is made of a φ42×3×600mm round tube profile, and the two halves of the sampling head 4 are machined, cast, stamped, or welded. Furthermore, the main body shape and size of the two halves are symmetrical, but to avoid interference when hinged with the support tube 1, the tail hinge ears of the two halves are staggered. Figure 10 , 11 As shown.

[0031] A guide groove can be provided between the push plate 7 and the support tube 1, so that the push plate 7 can slide along the axial direction of the support tube 1, but cannot rotate circumferentially relative to the support tube 1. In this way, when the power device 5 drives the screw 6 to rotate, it can drive the push plate 7 to move forward or backward, and then drive the two halves of the melon shell of the sampling head 4 to open or close through the connecting rod 8, so that it can be inserted into the biomass pile for sampling.

[0032] This embodiment further provides a mounting base 3 at the front end of the support tube 1 as an intermediate body connecting the sampling head 4 and the support tube 1, to facilitate manufacturing and assembly. Specifically, the mounting base 3 is sleeved on the front end of the support tube 1, and the two are fastened together by screws. The mounting base 3 is a section of round tube, and a sealing plate 31 with a rectangular hole is provided at its front end opening. The push plate 7 passes through the rectangular hole and is slidably connected to the sealing plate 31. The front end of the mounting base 3 is provided with two ear plates 32 with hinge holes. The hinge holes of the two ear plates 32 are coaxial, and the axis of the hinge holes intersects the plane of the axis of the mounting base 3. Figure 8 As shown; the push plate 7 is a U-shaped plate, with a nut at the U-shaped opening that can be threadedly connected to the screw 6, and a through hole at the arc end of the U-shaped plate that can be hinged to the connecting rod 8, as shown. Figure 9 As shown.

[0033] During assembly, the push plate 7 is inserted into the rectangular hole from the rear end of the mounting base 3, allowing the push plate 7 to slide into the mounting base 3. Then, the mounting base 3 is fitted onto the support tube 1 and secured with screws. When fitting the mounting base 3 onto the support tube 1, it is screwed in, causing the nut at the tail end of the push plate 7 to thread into the screw 6. After the mounting base 3 is installed, the two halves of the sampling head 4 are hinged to the mounting base 3 using a pin, and the push plate 7 is connected to the inner side of the two halves of the sampling head 4 using the connecting rod 8. For disassembly, simply loosen the screws to remove the mounting base 3 from the support tube 1. The mounting base 3 and its connecting components can be carried as a single unit.

[0034] In addition, such as Figure 5 As shown, in order to facilitate the installation and disassembly of the power device 5, the tail end of the support tube 1 is provided with a plug-in seat 11 for easy insertion and fixing of the power device 1. The plug-in seat 11 is a rectangular straight tube with rounded ends or rounded or chamfered corners. The side of the plug-in seat 11 is provided with a locking screw 12 for pressing the power device 5 to fix it.

[0035] Working principle: During operation, hold the tail end of the sampler, keeping the sampling head 4 in a closed state. The sampling head 4 is shaped like a melon seed, making it easy to insert into the biomass pile when pushing the sampler. When it is inserted to a certain depth, start the power device 5 to make the motor rotate forward, driving the sampling head 4 to open. Then shake or slightly rotate the sampler to allow the biomass to enter between the two halves of the melon shell of the sampling head 4. Then, turn the reverse lever and press the switch again to start the motor, causing the screw 6 to reverse and drive the push plate 7 to retract, thereby driving the sampling head 4 to close and collect the biomass between the two halves of the melon shell. Finally, pull out the sampler, turn the lever again, press the switch to make the motor rotate forward, open the sampling head 4, and take out the sample.

[0036] Example 2.

[0037] like Figure 2 As shown, in order to adapt to different sampling depths and to make it more convenient to pack and carry, and to facilitate operators to work outdoors, the support tube 1 in this embodiment is set into two parts, namely, the support tube 1 located at the rear end where the power device 6 can be installed, and the telescopic tube 3 located at the front end and sleeved with the support tube 1; at this time, the mounting seat 4 described in Embodiment 1 is installed at the front end of the telescopic tube 3.

[0038] To this end, the support tube 1 is provided with fastening screws 13 to secure the telescopic tube 3 and prevent it from sliding, so that the telescopic tube 3 can be locked after the appropriate length is adjusted; there are at least three fastening screws 13, all of which are located on a circumference at the front end of the support tube, and the telescopic tube 3 is provided with at least one set of locking holes that match the fastening screws 13, the diameter of which is equal to that of the fastening screws 13.

[0039] To accommodate the adjustable length of the sampler via the telescopic tube 3, the transmission mechanism of the power unit 5 driving the sampling head 4 also needs to be redesigned, meaning it also needs to be synchronously extendable and retractable. This embodiment is configured as follows: Figure 6 As shown, the telescopic tube 3 is rotatably connected to the transmission tube 9 through a bearing. The screw 6 is fixed to the front end of the transmission tube 9. The tail end of the transmission tube 9 is sleeved with the transmission tube 10. The transmission tube 10 is slidably connected to the transmission tube 9. The transmission tube 10 and the transmission tube 9 cannot rotate relative to each other. The tail end of the transmission tube 10 is fixedly connected to the output shaft of the power device 5.

[0040] Furthermore, this embodiment also incorporates the following design:

[0041] The first transmission tube 9 and the second transmission tube 10 are square tubes. The front end of the output shaft of the power device 5 is set as a square shaft, and the side length of the square shaft is equal to the side length of the inner tube of the second transmission tube 10. In this way, after the power device 5 is inserted into the plug-in 11 at the tail end of the support tube 1, its square shaft can be inserted into the second transmission tube 10, thereby driving the second transmission tube 10 to rotate, which in turn drives the first transmission tube 9 to rotate, which in turn drives the push plate 7 to move forward or backward along the screw 6, and in turn drives the sampling head 4 to open and close.

[0042] like Figure 12 As shown, in order to prevent the power unit 5 from disengaging from the transmission tube 10 during operation, the front square shaft of the power unit 5 is provided with a radial elastic mechanism 51 to prevent the transmission tube 10 from falling off. The radial elastic mechanism 51 is provided in the transverse through hole of the front square shaft of the power unit 5. One end of the hole is provided with a neck and the other end is provided with a thread. The radial elastic mechanism 51 includes a bottom screw, a locking spring and a steel ball.

[0043] like Figure 7 As shown, to prevent the second transmission tube 10 from falling into the first transmission tube 9, an anti-detachment spring 20 is provided between the first transmission tube 9 and the second transmission tube 10. The anti-detachment spring 20 is located inside the second transmission tube 10, and a stop plate 101 is fixed inside the second transmission tube 10. The two ends of the anti-detachment spring 20 abut against the stop plate 101 and the front end plate of the first transmission tube 9, respectively. In this way, the anti-detachment spring 20 can push the second transmission tube 10 backward, keeping it in contact with the tail end of the support tube 1. This also further facilitates the assembly of the power device 5, allowing its output shaft to smoothly connect with the second transmission tube 10, while further preventing them from falling off during operation.

[0044] Working principle:

[0045] During operation, the first step is to assemble the sampling machine, namely: 1. Install the sampling head 4 onto the mounting base 3 via a pin, insert the push plate 7 from the rear into the mounting base 3 and pass it through the rectangular hole at its front end, and use two connecting rods 8 of the same length to connect the front end of the push plate 7 to the two halves of the melon shell of the sampling head 4 respectively; 2. Insert the mounting base 3 into the front end of the telescopic tube 2, and screw the push plate 7 into the screw rod 6 for threaded connection; 3. Insert the transmission tube 10 into the transmission... 4. Insert the telescopic tube 2 into the support tube 1, adjust the insertion depth, and lock it with the fastening screw 13; 5. Insert the power device 5 into the plug-in seat 11 at the tail end of the support tube 1 and lock it. When inserting, hold the sampling head 4 with one hand and rotate it, and use the other hand to find the right position so that the front square shaft of the power device 5 fits with the transmission tube 10; 6. Tighten the screws on the telescopic tube 2 to fix the mounting seat 3 to the telescopic tube 2.

[0046] Step two: Hold the sampler with both hands, select the location of the biomass pile, insert it at the specified angle, and after reaching the specified depth, operate the power device 5 to open the sampling head 4, rotate or slightly pull it and then insert it into the sampler to allow the biomass to enter between the two halves of the melon shell of the sampling head 4. Operate the power device 5 again to close the sampling head 4, then pull out the sampler, take out the sample, and clean the sampling head 4 before proceeding to the next sampling.

[0047] Example 3.

[0048] All metal components are made of carbon steel, and the specific models and dimensions are as follows: Support tube 1: φ42×3×300mm round tube, with a plug-in seat 11 at the tail end for mounting the power device 5. The bottom of the plug-in seat 11 is provided with a through hole for the output shaft of the power device 5 to pass through. Telescopic tube 2: φ36×2×330mm round tube; Power unit 5: Modified electric drill; Transmission tube 9: a square tube 18×2×300mm, which is rotatably connected to the telescopic tube 2 via a needle roller bearing, and a screw 6 is welded to the front end; Transmission tube 2 10: square tube 14×2×295mm, with a round plate with a hole of the same diameter as the inner diameter at the tail end, and a stop plate 101 in the middle section of transmission tube 2 10. Anti-detachment spring 20: In its free state, its length is greater than the distance between the abutment plate 101 and the front end plate of the transmission tube 9 when the sampler is adjusted to its longest position; Mounting base 3: inserted into the front end of telescopic tube 2, and hinged to the two halves of the melon shell of the sampling head 4 by a pin; Push plate 7: It is slidably connected to the mounting base 3, and its tail end is threadedly connected to the screw rod 6 through a nut. Its front end is hinged to the two melon shells through the connecting rod 8.

[0049] In addition, the diameter of the through hole at the bottom of the connector 11 is smaller than the outer diameter of the telescopic tube 2; thus, when the sampler is adjusted to its shortest length, the tail end of the telescopic tube 2 can touch the bottom of the connector 11.

[0050] like Figure 3 As shown, when the length of the sampler is adjusted to its shortest length, the tail end of the telescopic tube 2 abuts against the tail end of the support tube 1, pushing the support tube 1, which is equivalent to directly pushing the telescopic tube 2, inserting the sampling head 4 at the front end into the sampling pile.

[0051] Example 4.

[0052] like Figure 4 As shown, the length of the sampler is adjusted to its maximum. At this time, tighten the fastening screw 13 located at the front end of the support tube 1 so that it is inserted into the hole located on the circumference of the rear end of the telescopic tube 2. In this way, when the support tube 1 is pushed, the force can be transmitted to the telescopic tube 2 through the fastening screw 13, and the sampling head 4 at the front end is inserted into the sampling pile.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and for the convenience of describing the technical solutions, the front, back, left, right, top, middle, and bottom orientations are based on the accompanying drawings and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A handheld portable biomass sampler, characterized in that: The device includes a support tube, with a sampling head that, when closed, is shaped like a melon seed, hinged to its front end. A power device for driving the sampling head to open and close is located at the rear end of the support tube. A screw is installed inside the support tube, with its rear end fixedly connected to the output shaft of the power device. A push plate is threadedly connected to the front end of the screw, and the push plate is slidably connected to the support tube. Two connecting rods of equal length are hinged to the front end of the push plate. The sampling head consists of two symmetrical melon shell halves, with their rear ends hinged to the support tube. The inner walls of the two melon shell halves are respectively hinged to the other ends of the two connecting rods.

2. The handheld portable biomass sampler according to claim 1, characterized in that: The front end of the support tube is fitted with a mounting base, and the two are fastened together by screws. The mounting base is a section of round tube, and a sealing plate with a rectangular hole is provided at the front end opening. The push plate passes through the rectangular hole and is slidably connected to the sealing plate. The front end of the mounting base is provided with two ear plates with hinge holes. The hinge holes of the two ear plates are coaxial, and the axis of the hinge holes intersects with the axial plane of the mounting base.

3. A handheld portable biomass sampler according to claim 1, characterized in that: The push plate is a U-shaped plate with a nut that can be threadedly connected to the screw at the U-shaped opening and a through hole that can be hinged to the connecting rod at the arc end of the U-shaped plate.

4. A handheld portable biomass sampler according to claim 1, characterized in that: The tail end of the support tube is provided with a plug-in seat to facilitate the insertion and fixing of the power device. The plug-in seat is a rectangular straight tube with rounded ends or rounded or beveled corners. The side of the plug-in seat is provided with a locking screw to press the power device and fix it.

5. A handheld portable biomass sampler according to claim 1, characterized in that: The power unit includes a power motor and a battery that drives the power motor, as well as a control device for controlling the start, stop, speed, forward and reverse rotation of the power motor.

6. A handheld portable biomass sampler according to claim 1, characterized in that: The support tube is fitted with a telescopic tube inside, and the mounting seat is located at the front end of the telescopic tube. The support tube is provided with fastening screws to secure the telescopic tube and prevent it from sliding. There are at least three fastening screws, and all the fastening screws are located on a circumference at the front end of the support tube. The telescopic tube is provided with at least one set of locking holes that match the fastening screws. The diameter of the locking holes is equal to that of the fastening screws.

7. A handheld portable biomass sampler according to claim 6, characterized in that: The telescopic tube is rotatably connected to a transmission tube one via a bearing. The screw is fixed to the front end of the transmission tube one. The tail end of the transmission tube one is sleeved with a transmission tube two. The transmission tube two is slidably connected to the transmission tube one. The transmission tube two and the transmission tube one cannot rotate relative to each other. The tail end of the transmission tube two is fixedly connected to the output shaft of the power device.

8. A handheld portable biomass sampler according to claim 7, characterized in that: The first and second transmission tubes are square tubes, and the front end of the output shaft of the power device is set as a square shaft, the side length of which is equal to the side length of the inner tube of the second transmission tube.

9. A handheld portable biomass sampler according to claim 8, characterized in that: The front square shaft of the power unit is provided with a radial elastic mechanism to prevent the transmission tube from falling off. The radial elastic mechanism is provided in the transverse through hole of the front square shaft of the power unit. One end of the hole is provided with a neck and the other end is provided with a thread. The radial elastic mechanism includes a bottom screw, a locking spring and a steel ball.

10. A handheld portable biomass sampler according to claim 7, characterized in that: An anti-detachment spring is provided between the first transmission tube and the second transmission tube. The anti-detachment spring is located inside the second transmission tube. A stop plate is fixed inside the second transmission tube. The two ends of the anti-detachment spring abut against the stop plate and the front end plate of the first transmission tube, respectively.

Images