A tree trunk film covering device for nighttime sap flow detection

Abstract

This invention belongs to the technical field of mulching equipment, specifically relating to a tree trunk mulching device for nighttime sap flow detection. It includes a main rod, a first support rod, and a membrane rod. Two second support rods are fixedly connected to the main rod. A membrane pressing assembly is provided on the outward-facing side of each second support rod. The membrane pressing assembly includes a rotating wheel, which is rotatably connected to the second support rods via a shaft. The rotating wheel has a wheel housing, which includes a shell and a rotating body. The shell is mounted on the rotating wheel, and the rotating body is rotatably connected to the side wall of the shell facing the second support rods. The rotating body has a keyed through hole for the shaft to pass through. An elastic cylinder is provided between the shell and the rotating wheel. An elastic strip is provided on the outer wall of the elastic cylinder, and a groove is provided on the circumferential wall of the shell for the elastic strip to pass through. This invention addresses the problem of poor sealing and waterproofing due to the difficulty of the membrane adhering tightly to the tree trunk in recessed areas.

Description

Technical Field

[0001] This invention belongs to the field of film covering equipment technology, and in particular relates to a tree trunk film covering device for nighttime sap flow detection. Background Technology

[0002] Nocturnal sap flow refers to the amount of sap flowing through the roots, stems, and leaves of plants at night. Field observations of different species, habitats, and ecosystems have revealed the widespread existence of nocturnal sap flow in plants. This paper describes the magnitude and composition of nocturnal sap flow and reviews and analyzes existing research progress regarding its physiological significance, influencing factors, and eco-hydrological effects. Nocturnal sap flow generally accounts for 5%–20% of the total daily sap flow. Nocturnal sap flow includes two processes: nighttime stem water replenishment and nighttime transpiration, but currently, there is no definitive research or technique to distinguish between these two processes. Although the overall proportion of nighttime sap flow in the total daily sap flow is relatively small, its water storage and transpiration functions have significant physiological implications for plant growth: nighttime water storage increases the nighttime stem water potential, reduces xylem plugging, and enhances the plant's adaptation to arid environments; while transpiration plays an important role in the transport of nutrients and oxygen, as well as hydraulic enhancement. Accurately measuring the changes in nocturnal sap flow in plant trunks is a difficult but crucial task. The instrument used to measure sap flow in plants is usually a runoff meter (stem flow meter).

[0003] Different types of plant stem flow meters use different methods and principles to measure sap flow, mainly including the thermal pulse rate method, the valve stem thermal balance method, the thermal diffusion method, and the laser thermal pulse method. Most plant stem flow meters use the heat dissipation probe method to measure the instantaneous runoff density of tree trunks, allowing for long-term continuous observation of sap flow in trees. This is beneficial for studying the water exchange patterns between tree trunks and serves as an observation method. Long-term monitoring of the impact of forest ecosystems on environmental change has important theoretical guiding significance and application value for afforestation, forest management, and forestry management.

[0004] When using a stem flow meter to detect sap flow in tree trunks at night, the monitoring area needs to be wrapped with a thin film. Because tree trunks are typically irregular with many indentations, it's difficult for the film to adhere tightly, resulting in poor sealing and waterproofing. Therefore, the trunk needs to be manually sanded smooth before wrapping. However, manual sanding is labor-intensive and can easily damage the trunk. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a tree trunk covering device for nighttime liquid flow detection, which solves the problem that the film is difficult to adhere tightly to the tree trunk in recessed areas, resulting in poor sealing and waterproofing.

[0006] The present invention solves the above-mentioned technical problems through the following technical means:

[0007] A tree trunk mulching device for nighttime sap flow detection includes a main pole, a first support pole, and a membrane rod. Two second support poles are fixedly connected to the main pole. A membrane pressing assembly is provided on the outward-facing side of the second support poles. The membrane pressing assembly includes a rotating wheel, which is rotatably connected to the second support poles via a shaft. The outer frame of the rotating wheel has a wheel shell, which includes a housing and a rotating body. The housing is framed on the rotating wheel, and the rotating body is rotatably connected to the side wall of the housing facing the second support poles. A keyed through hole for the shaft to pass through is provided on the rotating body. An elastic cylinder is provided between the housing and the rotating wheel. An elastic column is provided on the outer wall of the elastic cylinder, and a groove for the elastic column to pass through is provided on the circumferential wall of the housing. A clamping ring assembly is connected to the main pole. The clamping ring assembly includes a bushing, which is fitted around the middle of the main pole and rotatably connected to the main pole. A retainer is provided on the bushing, and a support arm is provided on the bushing. A secondary pole is provided at the other end of the support arm, and a third support pole is provided at both ends of the secondary pole. A chuck is rotatably connected to the outer side of the third support pole.

[0008] Based on the above technical solution, the present invention has made the following improvements:

[0009] Furthermore, the support arm includes an upper support arm and a lower support arm. The end of the upper support arm is fixedly connected to the middle of the auxiliary rod, and the end of the lower support arm is fixedly connected to the bushing. The upper and lower support arms are inserted into the same sliding sleeve, which is equipped with a fastening nut. The length of the support arm can be adjusted to facilitate clamping tree trunks of different sizes.

[0010] Furthermore, both the main pole and the auxiliary pole are telescopic poles, which facilitates coverage of the test area on tree trunks of varying widths.

[0011] Furthermore, the retainer includes a retaining sleeve, which is fixedly connected to the circumferential wall of the bushing. A retaining block is slidably connected inside the retaining sleeve, and a threaded cap is threaded onto the retaining sleeve. Rotating the threaded sleeve can press the retaining block against the main rod, thereby fixing the bushing to the main rod, which is convenient to operate.

[0012] Furthermore, the end of the abutment block facing the main rod is an arc end, and the radius of the arc end is the same as the radius of the main rod. This increases the contact area, enhances friction, and improves stability.

[0013] Furthermore, the arc-shaped end of the supporting block is provided with barbs, including left and right barbs, both of which are oriented inwards. The left and right barbs act simultaneously on the main rod, and the forces exerted by the left and right barbs on the main rod are exactly opposite, preventing slippage and further improving stability.

[0014] The beneficial effects of this invention are as follows: the film covering device can be clamped onto tree trunks of different sizes by rotating the bushing, making it highly practical; rotating the film covering device allows the film to be wrapped around the tree trunk, making it easy to operate and highly effective; during the film covering process, the elastic column can insert the film into the recessed parts of the tree trunk, allowing the film to better fit tightly to the tree trunk and providing better sealing and waterproofing; moreover, there is no need to grind the tree trunk, resulting in less damage to the tree trunk and less manual labor. Attached Figure Description

[0015] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0016] Figure 1 This is a diagram showing the usage state of the coating device in an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the coating device in an embodiment of the present invention;

[0018] Figure 3 This is a cross-sectional view of the pressure film assembly in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the wheel housing structure in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the rotating wheel and the elastic cylinder in an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the bushing and retainer structure in an embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the bushing structure in an embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the structure of the supporting block in an embodiment of the present invention;

[0024] Among them, 1-main rod, 2-diaphragm rod, 3-pressing assembly, 31-rotor, 32-wheel housing, 321-housing, 322-rotating body, 323-through hole, 324-column groove, 33-elastic cylinder, 34-elastic column, 4-clamping ring assembly, 41-shaft sleeve, 42-fixer, 421-fixing sleeve, 422-support block, 423-screw cap, 424-left spike, 425-right spike, 43-support arm, 431-upper support arm, 432-lower support arm, 433-sliding sleeve, 44-sub-rod, 45-clip roller. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0026] like Figures 1 to 8 shown

[0027] A tree trunk covering device for nighttime sap flow detection includes a main rod 1, with first support rods fixedly connected to both ends of the main rod 1, and a membrane rod 2 rotatably connected between the two first support rods. A thin film for wrapping the tree trunk is rolled on the membrane rod 2. Two second support rods are fixedly connected to the main rod 1. The distance between the two second support rods is smaller than the distance between the two first support rods, and the length of the second support rod is smaller than the length of the first support rod. The second support rods are set at an acute angle to the first support rods along the axial direction of the main rod 1.

[0028] The second support rod has a film pressing assembly 3 on its outward-facing side. The film pressing assembly 3 is used to press the upper and lower sides of the film into the recessed parts of the tree trunk, so that the film adheres tightly to the tree trunk. The film pressing assembly 3 is connected to the second support rod. When covering the tree trunk with film, the main rod 1 can be suspended in the air, which makes it easy for monitoring devices installed on the tree trunk to pass between the two film pressing assemblies 3, and to easily wrap these devices with film. The film pressing assembly 3 includes a rotating wheel 31. The rotating wheel 31 is rotatably connected to the second support rod through a shaft. The outer frame of the rotating wheel 31 has a wheel shell 32. The wheel shell 32 includes a housing 321 and a rotating body 322. The housing 321 is framed on the rotating wheel 31. The housing 321 and the rotating wheel 31 are intermittently arranged. The side wall of the housing 321 facing the second support rod is provided with A circular hole is provided for embedding the rotating body 322, which is rotatably connected to the side wall of the housing 321 facing the second support rod. The rotating body 322 has a keyed through hole 323 for the shaft to pass through, allowing the shaft to slide along the through hole 323. An elastic cylinder 33 is provided between the housing 321 and the rotating wheel 31. An elastic strip 34 is provided on the outer wall of the elastic cylinder 33. A groove 324 is provided on the circumferential wall of the housing 321 for the elastic strip 34 to pass through. When the rotating wheel 31 compresses the rubber ring, the elastic strip 34 on the outer wall of the rubber ring can pass through the groove 324, thereby pressing the film into the recessed part of the tree trunk. The outer end of the elastic strip 34 extends through the groove 324 to the housing 321. Externally, when the elastic cylinder 33 contracts and returns to its original position, the elastic strip 34 will not retract completely into the housing 321, thus preventing the elastic strip 34 from getting stuck in the housing 321. The width of the groove 324 is greater than the width of the elastic strip 34. When the elastic strip 34 abuts against a non-recessed part of the tree trunk, the elastic strip 34 can bend along the width direction of the groove 324, making it convenient for other strips on the same groove 324 to insert the film into the recessed part of the tree trunk. A clamping ring assembly 4 is connected to the main rod 1. With the clamping cooperation of the clamping ring assembly 4 and the film pressing assembly 3, the film covering device can be directly clamped onto the tree trunk. Rotating the device can cover the tree trunk with the film, which is convenient to operate. The clamping ring assembly 4 Includes a bushing 41, which is fitted onto the middle of the main rod 1 and is rotatably connected to the main rod 1. By rotating the bushing 41, the angle between the clamping ring assembly 4 and the pressing film assembly 3 can be changed, indirectly changing the distance between the clamping ring assembly 4 and the pressing film assembly 3, which is convenient for clamping on tree trunks of different sizes. The bushing 41 is provided with a retainer 42, which can fix the bushing 41 to the main rod 1. The bushing 41 is provided with a support arm 43, and the other end of the support arm 43 is provided with a secondary rod 44. The two ends of the secondary rod 44 are provided with third support rods. The outer side of the third support rod is rotatably connected with a chuck 45. The distance between the two third support rods is equal to the distance between the two second support rods, which is convenient for the chuck 45 to press on the upper and lower sides of the film.

[0029] When using this film covering device, adjust the angle between the clamping ring assembly 4 and the pressing film assembly 3 according to the size of the tree trunk, then fix the bushing 41 on the main rod 1, clamp the film covering device on the part of the tree trunk to be tested, then pull out the film and press it under the pressing film assembly 3 and the chuck 45, then rotate the film covering device so that the film covering shaft rotates along the tree trunk, so that the film on the film rod 2 can be quickly wrapped on the tree trunk, and with the cooperation of the elastic column 34, the film can be embedded into the recessed part of the tree trunk, and the film can fit tightly with the tree trunk, with better sealing and waterproofing.

[0030] Specifically, the support arm 43 includes an upper support arm 431 and a lower support arm 432. The end of the upper support arm 431 is fixedly connected to the middle of the auxiliary rod 44, and the end of the lower support arm 432 is fixedly connected to the bushing 41. The upper support arm 431 and the lower support arm 432 are inserted into the same sliding sleeve 433. The upper support arm 431 and the lower support arm 432 can slide along the sliding sleeve 433. The sliding sleeve 433 is provided with a fastening nut. By tightening the fastening nut, the upper support arm 431 and the lower support arm 432 can be fixed. With the cooperation of the sliding sleeve 433, the length of the support arm 43 can be adjusted to facilitate clamping tree trunks of different sizes.

[0031] Specifically, both the main pole 1 and the auxiliary pole 44 are telescopic poles, which facilitates changing the spacing between the pressing assembly 3 and the caliper 45, and makes it easy to cover the test area of ​​the tree trunk of different widths.

[0032] Specifically, the fixing device 42 includes a fixing sleeve 421, which is fixedly connected to the circumferential wall of the bushing 41. A retaining block 422 is slidably connected inside the fixing sleeve 421. The fixing sleeve 421 is provided with external threads and a screw cap 423 is threadedly connected to the fixing sleeve 421. By rotating the screw sleeve, the retaining block 422 can be pressed onto the main rod 1, thereby fixing the bushing 41 onto the main rod 1.

[0033] Specifically, the end of the abutment block 422 facing the main rod 1 is an arc end, and the radius of the arc end is the same as the radius of the main rod 1, which facilitates the contact between the end of the abutment block 422 and the main rod 1, thereby increasing the contact area, increasing the friction, and improving the fixation.

[0034] Specifically, the arc end of the abutment block 422 is provided with barbs, including a left barb 424 and a right barb 425. The barbs 424 and 425 are both oriented inward, with the left barb 424 facing to the right and the right barb 425 facing to the left. When the abutment block 422 abuts against the main rod 1, the left barb 424 and the right barb 425 can act on the main rod 1 simultaneously. The force directions of the left barb 424 and the right barb 425 acting on the main rod 1 are exactly opposite, which can further fix the abutment block 422 to the main rod 1, thereby improving the stability between the bushing 41 and the main rod 1 and making it more secure.

[0035] The method of using this invention is as follows: When using the film covering device, first adjust the angle between the clamping ring assembly 4 and the pressing film assembly 3 according to the size of the tree trunk, then fix the bushing 41 on the main rod 1, then clamp the film covering device on the part of the tree trunk to be tested, then pull out the film and press it under the pressing film assembly 3 and the chuck 45, then rotate the film covering device so that the film covering shaft rotates along the tree trunk, so that the film on the film rod 2 can be quickly wrapped on the tree trunk. With the cooperation of the elastic column 34, the film can be embedded into the recessed part of the tree trunk, and the film can fit tightly with the tree trunk, with better sealing and waterproofing, convenient operation, and low labor intensity.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. 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 spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention. Technical aspects, shapes, and structures not described in detail in this invention are all well-known technologies.

Claims

1. A trunk mulching device for nighttime sap flow detection, comprising a main pole (1), a first support pole, and a membrane rod (2), characterized in that: Two second support rods are fixedly connected to the main rod (1). A pressure film assembly (3) is provided on the outward side of the second support rod. The pressure film assembly (3) includes a rotating wheel (31). The rotating wheel (31) is rotatably connected to the second support rod through a shaft. The outer frame of the rotating wheel (31) has a wheel shell (32). The wheel shell (32) includes a housing (321) and a rotating body (322). The housing (321) is framed on the rotating wheel (31). The rotating body (322) is rotatably connected to the side wall of the housing (321) facing the second support rod. A flat key type through hole (323) for the shaft to pass through is provided on the rotating body (322). An elastic cylinder (323) is provided between the housing (321) and the rotating wheel (31). 3) The outer wall of the elastic cylinder (33) is provided with an elastic column (34), and the circumferential wall of the housing (321) is provided with a column groove (324) for the elastic column (34) to pass through; the main rod (1) is connected with a clamping ring assembly (4), the clamping ring assembly (4) includes a bushing (41), the bushing (41) is sleeved in the middle of the main rod (1), the bushing (41) is rotatably connected to the main rod (1), the bushing (41) is provided with a fixing device (42), the bushing (41) is provided with a support arm (43), the other end of the support arm (43) is provided with a secondary rod (44), the two ends of the secondary rod (44) are provided with a third support rod, and the outer side of the third support rod is rotatably connected with a cam (45).

2. A trunk covering device for nighttime sap flow detection according to claim 1, characterized in that: The support arm (43) includes an upper support arm (431) and a lower support arm (432). The end of the upper support arm (431) is fixedly connected to the middle of the auxiliary rod (44), and the end of the lower support arm (432) is fixedly connected to the bushing (41). The upper support arm (431) and the lower support arm (432) are inserted into the same sliding sleeve (433), and the sliding sleeve (433) is provided with a fastening nut.

3. A trunk covering device for nighttime sap flow detection according to claim 2, characterized in that: Both the main rod (1) and the auxiliary rod (44) are telescopic rods.

4. A trunk covering device for nighttime sap flow detection according to claim 3, characterized in that: The fixture (42) includes a fixing sleeve (421), which is fixedly connected to the circumferential wall of the bushing (41). A retaining block (422) is slidably connected inside the fixing sleeve (421), and a screw cap (423) is threadedly connected to the fixing sleeve (421).

5. A trunk covering device for nighttime sap flow detection according to claim 4, characterized in that: The end of the abutment block (422) facing the main rod (1) is an arc end, and the radius of the arc end is the same as the radius of the main rod (1).

6. A trunk covering device for nighttime sap flow detection according to claim 5, characterized in that: The arc end of the abutment block (422) is provided with barbs, the barbs include a left barb (424) and a right barb (425), and the barbs (424) and the right barb (425) are both arranged inward.

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