Sample sampling detection system for forest carbon sink test

Abstract

The invention discloses a forest carbon sink test sample sampling detection system, which comprises a material injection cleaning mechanism, the material injection cleaning mechanism comprises an experiment operation box, the experiment operation box is internally provided with a rotary clamping mechanism, the rotary clamping mechanism comprises a motor, and the motor is fixedly installed at the top of the experiment operation box through a support. An output shaft of the motor is fixedly connected with a rotating rod through a coupling. The invention relates to the technical field of forest carbon sink testing. According to the sample sampling detection system for forest carbon sink testing, the material injection cleaning mechanism and the rotary clamping mechanism are used in a combined manner, and through the arrangement of the two mechanisms, liquid injection, detection, discharging, cleaning and other procedures can be sequentially completed on different kinds of soil through driving of a motor and an electric telescopic rod and linkage between structures; a worker does not need to carry out tedious and long-time operation, so that the soil carbon content detection efficiency is improved, and the current use is met.

Description

Technical Field

[0001] The present invention relates to the technical field of forest carbon sink testing, and specifically to a sample sampling and detection system for forest carbon sink testing. Background Art

[0002] As an important carbon sink entity, forests can absorb carbon dioxide in the atmosphere and effectively mitigate climate change. In the carbon trading system, the accurate measurement of forest carbon sinks is the basis for evaluating carbon emission reduction. Through advanced air monitoring technologies and combined with forestry ecological research, the forest carbon sink capacity can be quantified, providing a scientific basis for carbon trading.

[0003] Existing forest carbon sink tests collect information on various factors such as the air, soil, and biomass of the forest, and then use data algorithms to obtain the forest carbon sink amount. One of the more cumbersome tasks is the detection of soil carbon content. Generally, staff collect soil samples from different locations and then send them to the laboratory for spectrophotometric detection to obtain the specific carbon content value. Although it can be detected, there are still obvious defects in actual operation, such as: When testing the soil, a part of potassium dichromate solution needs to be injected into the soil first, and then the mixed solution with the soil is taken out and placed in a colorimetric cuvette, and the colorimetric cuvette is inserted into the spectrophotometer for detection and comparison. Since the collected soil locations and weights are different, each one requires pre-operation by the staff, and the filled colorimetric cuvette also needs to be inserted and removed from the spectrophotometer. Therefore, the whole process has a large workload for the staff, is not easy to operate, and is cumbersome and inefficient; Therefore, a sample sampling and detection system for forest carbon sink testing that can improve the detection efficiency is now designed to solve such defects. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a sample sampling and detection system for forest carbon sink testing, which solves the problem of cumbersome and inefficient soil detection in existing forest carbon sink testing.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A sample sampling and detection system for forest carbon sink testing includes a feeding and cleaning mechanism, and the feeding and cleaning mechanism includes an experimental operation box, and a rotary clamping mechanism is installed inside the experimental operation box.

[0006] Preferably, the rotary clamping mechanism includes a motor, and the motor is fixedly installed on the top of the experimental operation box through a bracket. The output shaft of the motor is fixedly connected to a rotating rod through a coupling. The bottom end of the rotating rod penetrates the experimental operation box and extends into the interior of the experimental operation box. One end of the rotating rod extending into the interior of the experimental operation box is fixedly connected to a multi-sided bottom plate through a fixing plate. The front side of the top of the multi-sided bottom plate is fixedly connected to a rectangular frame through a fixing plate, and a number of rectangular frames are arranged in a ring shape. A guide rod is fixedly connected between the top and the bottom of the inner cavity of the rectangular frame, and a U-shaped flat frame is slidably installed on the surface of the guide rod.

[0007] Preferably, a second spring is sleeved on the surface of the guide rod, and the second spring is located at the bottom of the U-shaped flat frame. A cross slide rod is fixedly connected between the two sides of the inner cavity of the U-shaped flat frame. Clamping arc plates are slidably installed on both sides of the surface of the cross slide rod. Third springs are sleeved on both sides of the surface of the cross slide rod. Clamping grooves are formed on the opposite sides of the two clamping arc plates. Circular pull rods are fixedly connected to the opposite sides of the two clamping arc plates. One end of the circular pull rod away from the clamping arc plate penetrates the U-shaped flat frame and extends to the outside of the U-shaped flat frame. The end of the circular pull rod extending to the outside of the U-shaped flat frame is fixedly connected to a pressing piece.

[0008] Preferably, a horizontal rotating support rod is rotatably connected to the top of the rectangular frame through a bearing member. The front end of the horizontal rotating support rod is fixedly connected to a material containing cylinder through a bracket. A gear cylinder is fixedly connected to the surface of the horizontal rotating support rod. A liquid leakage hopper is fixedly connected to the bottom of the material containing cylinder. A bent limiting conduit matched with the clamping groove is slidably installed at the bottom of the liquid leakage hopper through an opening. The top end of the bent limiting conduit penetrates the material containing cylinder and extends into the interior of the material containing cylinder. The end of the bent limiting conduit extending into the interior of the material containing cylinder is fixedly connected to a liquid leakage bottom plate. Liquid seepage openings are formed on the surface of the bent limiting conduit and inside the liquid leakage hopper.

[0009] Preferably, an electric telescopic rod is fixedly connected to the rear part of the experimental operation box through a fixing plate. The top end of the electric telescopic rod is fixedly connected to a U-shaped pressing frame matched with the U-shaped flat frame through a fixing plate. The bottom end of the U-shaped pressing frame penetrates the experimental operation box and extends into the interior of the experimental operation box. A slope pressing frame matched with the pressing piece is fixedly connected to the top of the U-shaped pressing frame through a bracket. The bottom end of the slope pressing frame penetrates the experimental operation box and extends into the interior of the experimental operation box.

[0010] Preferably, a vertical pressure rod is slidably installed on the left side of the top of the experimental operation box through an opening. The top end of the vertical pressure rod is fixedly connected with a bent pressing plate through a fixing block. A first spring is sleeved on the surface of the vertical pressure rod and above the experimental operation box. One end of the vertical pressure rod inside the experimental operation box is fixedly connected with a pressure plug plate that cooperates with the material storage cylinder. The right side of the bent pressing plate is fixedly connected with a horizontal pressing plate through a bracket, and the horizontal pressing plate is located on the right side of the inner cavity of the experimental operation box.

[0011] Preferably, a liquid storage cylinder is fixedly connected to the left side of the experimental operation box through a bracket. The bottom of the liquid storage cylinder is fixedly connected with a liquid inlet pipe through an opening. The bottom end of the liquid inlet pipe penetrates through the experimental operation box and extends into the experimental operation box. An electromagnetic valve is fixedly installed on the surface of the liquid inlet pipe and inside the experimental operation box. On the right side of the top inner cavity of the experimental operation box, a first arc tooth plate and a second arc tooth plate that are meshed with the gear cylinder are respectively fixedly connected through brackets.

[0012] Preferably, a spectrophotometer is fixedly connected to the lower side of the rear of the experimental operation box through an opening. A socket is fixedly installed on the top of the spectrophotometer and inside the experimental operation box. A material dropping port is opened on the right side of the bottom inner cavity of the experimental operation box.

[0013] Preferably, a water pump is fixedly connected to the right side of the experimental operation box through a fixing plate. The water outlet of the water pump is fixedly connected with a high-pressure spray pipe, and one end of the high-pressure spray pipe penetrates through the experimental operation box and extends into the experimental operation box.

[0014] Preferably, a button that cooperates with the bent pressing plate is fixedly installed on the left side of the top of the experimental operation box through a fixing plate.

[0015] Beneficial effects The present invention provides a sample sampling and detection system for forest carbon sink testing. Compared with the existing technologies, the following beneficial effects are achieved: (1). In the sample sampling and detection system for forest carbon sink testing, by using the injection cleaning mechanism and the rotary clamping mechanism in a combined manner, the settings of these two mechanisms can utilize the driving of the motor and the electric telescopic rod and the linkage between the structures to sequentially complete processes such as liquid injection, detection, material discharge, and cleaning of different soils. It does not require cumbersome and time-consuming operations by staff, improves the efficiency of soil carbon content detection, and meets the current usage.

[0016] (2) The sample sampling and testing system for forest carbon sink testing is used by installing a material storage cylinder at the top of a rectangular frame with a horizontal rotating rod, and is used in combination with a liquid storage cylinder and a pressure plug plate. The setting of these structures can, after placing the soil inside the material storage cylinder, drive the material storage cylinder to move successively to the bottom of the liquid inlet pipe and the pressure plug plate by using an electric motor. Thus, when the electric telescopic rod subsequently pushes the curved pressing plate downward, it presses and activates a solenoid valve to inject a fixed amount of potassium dichromate solution into the material storage cylinder. And after the pressure plug plate drops again later, it can squeeze the soil and inject the mixed liquid into a colorimetric dish to complete the feeding, without the need for cumbersome operations by the staff.

[0017] (3) The sample sampling and testing system for forest carbon sink testing is used by installing a first arc tooth plate and a second arc tooth plate respectively at the top of the inner cavity of an experimental operation box, and is used in combination with a high-pressure spray pipe and an inclined surface pressing frame. The setting of these structures can, after the material storage cylinder completes the detection, drive the material storage cylinder to flip 180 degrees, and then use the downward pressure of a horizontal pressing plate to discharge the soil by a liquid leakage bottom plate. And a water pump uses the high-pressure spray pipe to clean the liquid leakage bottom plate. At the same time, when the inclined surface pressing frame descends to squeeze and press a pressure piece to open a clamping arc plate to automatically discharge the colorimetric dish, the whole process can effectively facilitate the staff to place and detect the subsequent soil, without the need for the staff to load and unload while conducting the experiment.

[0018] (4) The sample sampling and testing system for forest carbon sink testing is used by installing two clamping arc plates on the inner side of a U-shaped flat frame with a horizontal sliding rod, and is used in combination with a U-shaped pressing frame. The setting of these structures can quickly insert the colorimetric dish into the inner side of a clamping groove for fixation. At the same time, when the electric telescopic rod pushes the U-shaped pressing frame to descend, it can also make the U-shaped flat frame drive the colorimetric dish to insert into the inner side of a socket, thus completing the subsequent detection. And after the detection is completed, it can also use a second spring to pull out the colorimetric dish, improving the stability of the equipment and facilitating the operation. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a cross-sectional view of the structure of the experimental operation box of the present invention; Figure 3 is a bottom view of the internal structure of the experimental operation box of the present invention; Figure 4 is a schematic diagram of the structures of the U-shaped pressing frame, the inclined surface pressing frame and the vertical pressing rod of the present invention; Figure 5 is a side view of the internal structure of the experimental operation box of the present invention; Figure 6 is a schematic diagram of the structure of the rotary clamping mechanism of the present invention; Figure 7 is a schematic diagram of the structures of the rectangular frame, the guide rod and the U-shaped flat frame of the present invention; Figure 8 This is a cross-sectional view of the material storage cylinder and liquid leakage hopper structures of the present invention; Figure 9 This is a schematic diagram of the clip arc plate, third spring, and clamping groove structures of the present invention.

[0020] In the figure: 1, injection and cleaning mechanism; 2, rotary clamping mechanism; 101, experimental operation box; 102, electric telescopic rod; 103, U-shaped pressing frame; 104, inclined pressing frame; 105, vertical pressing rod; 106, bent pressing plate; 107, first spring; 108, pressure plug plate; 109, horizontal pressing plate; 110, liquid storage cylinder; 111, liquid inlet pipe; 112, solenoid valve; 113, first arc-shaped tooth plate; 114, second arc-shaped tooth plate; 115, spectrophotometer; 116, socket; 117, blanking port; 118, water pump; 119, high-pressure spray pipe; 120, button; 201, motor; 202, rotating rod; 203, multi-angle bottom plate; 204, rectangular frame; 205, guide rod; 206, U-shaped flat frame; 207, second spring; 208, horizontal sliding rod; 209, clip arc plate; 210, third spring; 211, clamping groove; 212, round pull rod; 213, pressing piece; 214, horizontal rotating support rod; 215, gear cylinder; 216, material storage cylinder; 217, liquid leakage hopper; 218, bent limiting conduit; 219, liquid leakage bottom plate; 220, liquid seepage port. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-9 , the present invention provides a technical solution: a sample sampling and detection system for forest carbon sink testing, including an injection and cleaning mechanism 1, and the injection and cleaning mechanism 1 includes an experimental operation box 101, and a rotary clamping mechanism 2 is installed inside the experimental operation box 101.

[0023] Please refer to Figure 6 , Figure 7 , Figure 8 and Figure 9, which shows the overall structure of the rotary clamping mechanism 2. The rotary clamping mechanism 2 includes a motor 201. The motor 201 is a servo motor, and the motor 201 is fixedly installed on the top of the experimental operation box 101 through a bracket. The output shaft of the motor 201 is fixedly connected with a rotating rod 202 through a coupling. The bottom end of the rotating rod 202 penetrates through the experimental operation box 101 and extends into the interior of the experimental operation box 101. One end of the rotating rod 202 extending into the interior of the experimental operation box 101 is fixedly connected with a multi-angle bottom plate 203 through a fixing plate. The front side of the top of the multi-angle bottom plate 203 is fixedly connected with a rectangular frame 204 through a fixing plate, and a number of rectangular frames 204 are arranged in a ring shape. A guide rod 205 is fixedly connected between the top and the bottom of the inner cavity of the rectangular frame 204. A U-shaped flat frame 206 is slidably installed on the surface of the guide rod 205. A second spring 207 is sleeved on the surface of the guide rod 205, and the second spring 207 is located at the bottom of the U-shaped flat frame 206. A cross sliding rod 208 is fixedly connected between the two sides of the inner cavity of the U-shaped flat frame 206. Clamping arc plates 209 are slidably installed on both sides of the surface of the cross sliding rod 208. Third springs 210 are sleeved on both sides of the surface of the cross sliding rod 208. Clamping grooves 211 are formed on the opposite sides of the two clamping arc plates 209. The inner wall of the clamping groove 211 is wrapped with a rubber layer to increase the friction force. Circular pull rods 212 are fixedly connected to the opposite sides of the two clamping arc plates 209. One end of the circular pull rod 212 away from the clamping arc plate 209 penetrates through the U-shaped flat frame 206 and extends to the outside of the U-shaped flat frame 206. A pressing piece 213 is fixedly connected to the end of the circular pull rod 212 extending to the outside of the U-shaped flat frame 206. The top of the rectangular frame 204 is rotationally connected with a horizontal rotating support rod 214 through a bearing member. A material receiving cylinder 216 is fixedly connected to the front end of the horizontal rotating support rod 214 through a bracket. A gear cylinder 215 is fixedly connected to the surface of the horizontal rotating support rod 214. A liquid leakage hopper 217 is fixedly connected to the bottom of the material receiving cylinder 216. A bent limiting conduit 218 which is matched with the clamping groove 211 is slidably installed at the bottom of the liquid leakage hopper 217 through an opening. The bent limiting conduit 218 is pre-positioned by a clamping groove and can only slide vertically and cannot rotate inside the liquid leakage hopper 217. The top end of the bent limiting conduit 218 penetrates through the material receiving cylinder 216 and extends into the interior of the material receiving cylinder 216. A liquid leakage bottom plate 219 is fixedly connected to the end of the bent limiting conduit 218 extending into the interior of the material receiving cylinder 216. A liquid seepage port 220 is formed on the surface of the bent limiting conduit 218 and inside the liquid leakage hopper 217.

[0024] During use, the motor 201 is pre-set. Each time it is started, it rotates clockwise by sixty degrees. Then different soil samples are placed inside the material receiving cylinder 216 from the front of the experimental operation box 101. Then the colorimetric dish is inserted between the two clamping arc plates 209 from the front and is located inside the clamping groove 211. At this time, the clamping arc plates 209 clamp the colorimetric dish under the elastic force of the third spring 210. At this time, the bottom end of the bent limiting conduit 218 is directly facing the colorimetric dish.

[0025] Please refer to Figure 3 、 Figure 4 and Figure 5 which show the overall structure of the injection and cleaning mechanism 1. At the rear of the experimental operation box 101, an electric telescopic rod 102 is fixedly connected through a fixing plate. The top of the electric telescopic rod 102 is fixedly connected through a fixing plate with a U-shaped pressing frame 103 that is used in cooperation with the U-shaped flat frame 206. And the bottom end of the U-shaped pressing frame 103 penetrates through the experimental operation box 101 and extends into the interior of the experimental operation box 101. The top of the U-shaped pressing frame 103 is fixedly connected through a bracket with an inclined surface pressing frame 104 that is used in cooperation with the pressing piece 213. And the bottom end of the inclined surface pressing frame 104 penetrates through the experimental operation box 101 and extends into the interior of the experimental operation box 101. On the left side of the top of the experimental operation box 101, a vertical pressing rod 105 is slidably installed through an opening. The top of the vertical pressing rod 105 is fixedly connected through a fixing block with a bent pressing plate 106. A first spring 107 is sleeved on the surface of the vertical pressing rod 105 and is located in the upper part of the experimental operation box 101. One end of the vertical pressing rod 105 located inside the experimental operation box 101 is fixedly connected with a pressure plug plate 108 that is used in cooperation with the material containing cylinder 216. The right side of the bent pressing plate 106 is fixedly connected through a bracket with a horizontal pressing plate 109, and the horizontal pressing plate 109 is located on the right side of the inner cavity of the experimental operation box 101. On the left side of the experimental operation box 101, a liquid storage cylinder 110 is fixedly connected through a bracket. The bottom of the liquid storage cylinder 110 is fixedly connected with a liquid inlet pipe 111 through an opening. The bottom end of the liquid inlet pipe 111 penetrates through the experimental operation box 101 and extends into the interior of the experimental operation box 101. An electromagnetic valve 112 is fixedly installed on the surface of the liquid inlet pipe 111 and is located inside the experimental operation box 101. After pre-setting, the electromagnetic valve 112 releases a fixed amount of solution every time it is started. On the right side of the top of the inner cavity of the experimental operation box 101, a first arc tooth plate 113 and a second arc tooth plate 114 that are meshed with the gear cylinder 215 are respectively fixedly connected through brackets. On the lower side of the rear part of the experimental operation box 101, a spectrophotometer 115 is fixedly connected through an opening. On the top of the spectrophotometer 115 and located inside the experimental operation box 101, a socket 116 is fixedly installed. On the right side of the bottom of the inner cavity of the experimental operation box 101, a material dropping port 117 is opened. On the right side of the experimental operation box 101, a water pump 118 is fixedly connected through a fixing plate. The water outlet of the water pump 118 is fixedly connected with a high-pressure spray pipe 119, and one end of the high-pressure spray pipe 119 penetrates through the experimental operation box 101 and extends into the interior of the experimental operation box 101. On the left side of the top of the experimental operation box 101, a button 120 that is used in cooperation with the bent pressing plate 106 is fixedly installed through a fixing plate.

[0026] After the colorimetric cuvette and the soil are placed, start the motor 201 to drive the multi-angle bottom plate 203 and several material cylinders 216 to rotate 60 degrees by means of the rotating rod 202. At this time, the material cylinder 216 containing the soil is located at the bottom of the liquid inlet pipe 111, and when the empty material cylinder 216 rotates to the front of the experimental operation box 101, another portion of soil is manually placed inside the material cylinder 216. When the material cylinder 216 moves to the bottom of the liquid inlet pipe 111, the electric telescopic rod 102 is activated to push the U-shaped pressing frame 103 and the inclined pressing frame 104 to descend synchronously. When it is about to touch the top of the experimental operation box 101, the top of the inclined pressing frame 104 will press the bent pressing plate 106 to push the vertical pressing rod 105 and the horizontal pressing plate 109 to also descend. When the bent pressing plate 106 descends to the bottommost position, it will press the button 120. After the button 120 is pressed, the solenoid valve 112 is activated to transport a certain amount of the potassium dichromate solution inside the liquid storage cylinder 110 into the material cylinder 216 to contact the soil. A part of the potassium dichromate solution will pass through the soil and flow into the colorimetric cuvette through the bent limiting conduit 218. Then, the electric telescopic rod 102 rises to pull the U-shaped pressing frame 103 and the inclined pressing frame 104 to reset, and the bent pressing plate 106 is also reset by the elastic force of the first spring 107. After the electric telescopic rod 102 completely rises, the liquid storage cylinder 110 is activated to drive the multi-angle bottom plate 203 to rotate 60 degrees again. When the material cylinder 216 rotates to below the pressure plug plate 108, as the horizontal pressing plate 109 descends again, it will push the pressure plug plate 108 to insert into the material cylinder 216 and squeeze the soil. At this time, the mixture of the potassium dichromate solution and the soil inside the soil is squeezed through the liquid leakage bottom plate 219 and the material cylinder 216 and leaks into the inner side of the liquid leakage hopper 217. Subsequently, the liquid passes through the liquid seepage port 220 and flows into the colorimetric cuvette through the bent limiting conduit 218. After the pressure plug plate 108 rises, the material cylinder 216 rotates to the upper part of the spectrophotometer 115. At this time, as the electric telescopic rod 102 pushes the U-shaped pressing frame 103 to descend, the U-shaped pressing frame 103 will push down the U-shaped flat frame 206 from both sides to descend under the limitation of the guide rod 205. At this time, the clip arc plate 209 holding the colorimetric cuvette also descends synchronously with the U-shaped flat frame 206. When the U-shaped flat frame 206 completely descends to the bottom, the colorimetric cuvette is also inserted into the plug socket 116. At this time, the spectrophotometer 115 is activated to detect the colorimetric cuvette. After the detection is completed, the electric telescopic rod 102 drives the U-shaped pressing frame 103 to rise, and the colorimetric cuvette rises and resets under the elastic force of the second spring 207. Subsequently, the material cylinder 216 continues to rotate 60 degrees. During this rotation, the gear cylinder 215 will engage with the first arc tooth plate 113 and drive the material cylinder 216 to rotate 180 degrees by means of the horizontal rotating support rod 214. At this time, the opening of the material cylinder 216 faces downward. As the electric telescopic rod 102 presses the horizontal pressing plate 109, the horizontal pressing plate 109 presses the bent limiting conduit 218 to push the liquid leakage bottom plate 219 downward to push out the soil inside the material cylinder 216. After the horizontal pressing plate 109 rises, the material cylinder 216 rotates to the upper part of the high-pressure spray pipe 119,At this time, after the horizontal pressure plate 109 descends again, it will press the bent limiting catheter 218 again to press down the liquid leakage bottom plate 219. At the same time, the inclined surface pressure frame 104 will contact and press the pressure piece 213 and squeeze the pressure piece 213. When the pressure piece 213 is squeezed, it will use the circular pull rod 212 to pull the two clamping arc plates 209 apart. At this time, the colorimetric dish inside the clamping groove 211 drops. At the same time, the water pump 118 starts to spray water on the liquid leakage bottom plate 219 for flushing through the high-pressure nozzle 119. As the electric telescopic rod 102 drives the inclined surface pressure frame 104 to rise, the two clamping arc plates 209 reset under the elastic force of the third spring 210. Then, when the multi-angle bottom plate 203 rotates again, it moves to the front of the experimental operation box 101 to facilitate soil placement. During this rotation, the gear cylinder 215 will engage with the second arc-shaped toothed plate 114 to cause a 180-degree rotation, making the opening of the material receiving cylinder 216 face upward again.

[0027] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A sample sampling and detection system for forest carbon sink testing, comprising a material injection and cleaning mechanism (1), characterized in that: The material injection and cleaning mechanism (1) comprises an experimental operation box (101), and a rotating clamping mechanism (2) is installed inside the experimental operation box (101).

2. A sample sampling and detection system for forest carbon sink testing according to claim 1, characterized in that: The rotary clamping mechanism (2) comprises a motor (201), and the motor (201) is fixedly mounted on the top of the experimental operation box (101) via a bracket, the output shaft of the motor (201) is fixedly connected to a rotating rod (202) via a coupling, the bottom end of the rotating rod (202) passes through the experimental operation box (101) and extends into the interior of the experimental operation box (101), one end of the rotating rod (202) extending into the interior of the experimental operation box (101) is fixedly connected to a polygonal bottom plate (203) via a fixing plate, the front side of the top of the polygonal bottom plate (203) is fixedly connected to a rectangular frame (204) via a fixing plate, and a plurality of rectangular frames (204) are arranged in a ring shape, a guide rod (205) is fixedly connected between the top and bottom of the inner cavity of the rectangular frame (204), and a U-shaped flat frame (206) is slidably mounted on the surface of the guide rod (205).

3. A sample sampling and detection system for forest carbon sink testing according to claim 2, characterized in that: The surface of the guide rod (205) is sleeved with a second spring (207), and the second spring (207) is located at the bottom of the U-shaped flat frame (206); a horizontal sliding rod (208) is fixedly connected between the two sides of the inner cavity of the U-shaped flat frame (206); clamp arc plates (209) are slidably installed on both sides of the surface of the horizontal sliding rod (208); third springs (210) are sleeved on both sides of the surface of the horizontal sliding rod (208); clamping grooves (211) are provided on the opposite sides of the two clamp arc plates (209); the opposite sides of the two clamp arc plates (209) are fixedly connected with a round pull rod (212); the end of the round pull rod (212) away from the clamp arc plate (209) passes through the U-shaped flat frame (206) and extends to the outside of the U-shaped flat frame (206); the end of the round pull rod (212) extending to the outside of the U-shaped flat frame (206) is fixedly connected with a pressing plate (213).

4. A sample sampling and detection system for forest carbon sink testing according to claim 3, characterized in that: The top of the rectangular frame (204) is rotatably connected to a transverse support rod (214) via a bearing member, the front end of the transverse support rod (214) is fixedly connected to a material holding barrel (216) via a bracket, the surface of the transverse support rod (214) is fixedly connected to a gear barrel (215), the bottom of the material holding barrel (216) is fixedly connected to a liquid funnel (217), the bottom of the liquid funnel (217) is slidably mounted with a curved limiting conduit (218) for use with a clamping groove (211) via an opening, the top end of the curved limiting conduit (218) penetrates the material holding barrel (216) and extends to the inside of the material holding barrel (216), one end of the curved limiting conduit (218) extending to the inside of the material holding barrel (216) is fixedly connected to a liquid leakage bottom plate (219), and a liquid seepage port (220) is provided on the surface of the curved limiting conduit (218) and located on the inner side of the liquid funnel (217).

5. A sample sampling and detection system for forest carbon sink testing according to claim 4, characterized in that: The rear portion of the experimental operation box (101) is fixedly connected to an electric telescopic rod (102) via a fixing plate, the top end of the electric telescopic rod (102) is fixedly connected to a U-shaped pressing frame (103) used in conjunction with the U-shaped flat frame (206) via a fixing plate, and the bottom end of the U-shaped pressing frame (103) passes through the experimental operation box (101) and extends into the interior of the experimental operation box (101), and the top of the U-shaped pressing frame (103) is fixedly connected to an inclined pressing frame (104) used in conjunction with a pressing sheet (213) via a bracket, and the bottom end of the inclined pressing frame (104) passes through the experimental operation box (101) and extends into the interior of the experimental operation box (101).

6. A sample sampling and detection system for forest carbon sink testing according to claim 5, characterized in that: A vertical pressure rod (105) is slidably mounted on the left side of the top of the experimental operation box (101) through an opening, and the top of the vertical pressure rod (105) is fixedly connected to a curved pressure plate (106) through a fixing block, and a first spring (107) is sleeved on the surface of the vertical pressure rod (105) and located at the upper part of the experimental operation box (101), and one end of the vertical pressure rod (105) located inside the experimental operation box (101) is fixedly connected to a pressure plug plate (108) used in conjunction with a material holding barrel (216), and the right side of the curved pressure plate (106) is fixedly connected to a horizontal pressure plate (109) through a bracket, and the horizontal pressure plate (109) is located on the right side of the inner cavity of the experimental operation box (101).

7. A sample sampling and detection system for forest carbon sink testing according to claim 6, characterized in that: The left side of the experimental operation box (101) is fixedly connected to a liquid storage cylinder (110) via a bracket, and the bottom of the liquid storage cylinder (110) is fixedly connected to a liquid inlet pipe (111) via an opening, and the bottom end of the liquid inlet pipe (111) passes through the experimental operation box (101) and extends to the inside of the experimental operation box (101), and a solenoid valve (112) is fixedly installed on the surface of the liquid inlet pipe (111) and located inside the experimental operation box (101), and the right side of the top of the inner cavity of the experimental operation box (101) is fixedly connected to a first arc tooth plate (113) and a second arc tooth plate (114) that mesh with the gear cylinder (215) via a bracket.

8. The sample sampling and detection system for forest carbon sink testing according to claim 5, characterized in that: A spectrophotometer (115) is fixedly connected to the lower side of the rear portion of the experimental operation box (101) via an opening, a socket (116) is fixedly installed on the top of the spectrophotometer (115) and located inside the experimental operation box (101), and a material drop opening (117) is opened on the right side of the bottom of the inner cavity of the experimental operation box (101).

9. A sample sampling and detection system for forest carbon sink testing according to claim 5, characterized in that: The right side of the experimental operation box (101) is fixedly connected to a water pump (118) via a fixing plate, a water outlet of the water pump (118) is fixedly connected to a high-pressure nozzle (119), and one end of the high-pressure nozzle (119) passes through the experimental operation box (101) and extends into the interior of the experimental operation box (101).

10. A sample sampling and detection system for forest carbon sink testing according to claim 5, characterized in that: A button (120) for use in conjunction with the bent pressing plate (106) is fixedly mounted on the left side of the top of the experimental operation box (101) via a fixing plate.

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