A device for targeted removal of invasive trees in parks and green spaces

Abstract

This utility model discloses a device for targeted removal of invasive trees in gardens and green spaces, comprising a bag and a fastening device for tightly binding the bag to the tree trunk. The bag includes a covering layer, and a slow-release layer for absorbing pesticide is sewn into the central area of ​​the covering layer near the tree trunk. The size of the covering layer is larger than that of the slow-release layer. The covering layer is made of opaque plastic sheeting to prevent moisture loss and inhibit photosynthesis; the slow-release layer is made of a sheet material with strong absorbency and good liquid retention. The fastening device passes through a channel formed by the covering layer pressing the slow-release layer inwards. This utility model requires no special tools, is highly versatile, and can significantly improve the removal efficiency of invasive trees.

Description

Technical Field

[0001] This utility model relates to the field of garden chemical application technology, specifically to a device for targeted removal of invasive trees in garden green spaces. Background Technology

[0002] Invasive trees, such as elm, paper mulberry, mulberry, and chinaberry, often intrude into the ornamental flora of parks and green spaces. These trees are resilient and grow rapidly; if not removed promptly, they suppress the growth of more aesthetically pleasing plants and disrupt the original layout of the park. Some seeds may even fall into wall cracks and roof crevices, causing serious damage to building foundations or roof waterproofing as their roots grow quickly. These invasive trees become entangled with park plants and building structures, making them difficult to remove.

[0003] Traditionally, herbicides are sprayed to remove invasive trees. However, because the spraying is generalized, it cannot achieve targeted removal, which can affect surrounding non-target plants and cause environmental pollution.

[0004] Chinese utility model patent CN220799216U discloses a tree growth inhibitor application device. This device achieves targeted and efficient removal of invasive trees by injecting a systemic herbicide into the tree trunk. Its structure includes a pesticide bottle, an infusion tube, a one-way valve, and an injection tube. The outlet of the pesticide bottle connects to the inlet of the infusion tube. Multiple injection ports are formed on the periphery of the injection tube, which is fitted with an injection base. The injection base is tapered, with its outer diameter gradually decreasing towards the injection tube away from the one-way valve. When inserted into a drill hole in the tree trunk, this tapered design ensures a tight fit between different parts of the base and drill holes of varying diameters, effectively preventing gaps between the drill hole and the injection tool and avoiding pesticide leakage. Simultaneously, the one-way valve prevents backflow of the pesticide, stabilizing the pesticide delivery effect and solving the problem of poor pesticide injection efficiency in existing tree trunk injection devices. However, this device requires specialized tools for drilling and injection, and the contact between the injection port and the tree trunk is "point contact," resulting in relatively low removal efficiency. Utility Model Content

[0005] This invention proposes a device for targeted removal of invasive trees in gardens and green spaces. Its purpose is to solve the problems of existing devices requiring the use of special injection tools, resulting in poor removal effects and low efficiency.

[0006] The technical solution of this utility model is as follows:

[0007] A device for targeted removal of invasive trees in gardens and green spaces includes a bag and a fastening element for tightly binding the bag to the tree trunk. The bag includes a covering layer, and a slow-release layer for absorbing pesticide is sewn into the central area of ​​the covering layer near the tree trunk. The size of the covering layer is larger than that of the slow-release layer. The covering layer is made of opaque plastic sheeting to prevent moisture loss and inhibit photosynthesis. The slow-release layer is made of a sheet material with strong adsorption and good liquid retention. The fastening element is configured through a channel formed by sewing the covering layer inwards to press the edge of the slow-release layer.

[0008] Furthermore, both the coating layer and the slow-release layer are circular. The diameter of the coating layer after it is unfolded is 2 to 3 times the circumference of the target tree trunk, and its diameter is 6 to 10 centimeters larger than that of the slow-release layer.

[0009] Furthermore, the covering layer is a black high-density polyethylene plastic sheet, and the slow-release layer is a cotton felt or a thickened needle-punched nonwoven fabric.

[0010] Optionally, the fastening element is a tie rope.

[0011] Optionally, the fastening element is an elastic ring.

[0012] Furthermore, it also includes an accessory for fitting the bag body, the accessory including a mouth support frame and a handle to extend the operating distance; the handle is a lightweight hollow rod, the mouth support frame includes a mouth support element and a frame body, the mouth support element is a C-shaped spring sheet, the lower end of which is bent outward to form a circular channel for the frame body to pass through; the frame body is made of steel wire and is a circular steel wire loop with an opening, the open end of the frame body extending with an outwardly protruding V-shaped part; the V-shaped part extends into the inner cavity of the handle; a pull rope is connected to the side of the V-shaped part away from the open end, and the pull rope passes through the handle and is connected to a pull ring.

[0013] Furthermore, the grip is made of lightweight aluminum alloy tubing or PVC tubing.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) This utility model uses a slow-release layer with a drug to wrap the tree trunk, thereby increasing the contact area between the drug and the tree trunk and improving the removal effect and efficiency.

[0016] (2) This utility model uses black high-density polyethylene plastic with strong weather resistance, waterproof and UV resistance, and a water-absorbing cotton felt sewn in its center as a slow-release layer to reduce the impact of light on pesticides and prevent moisture loss from affecting efficacy. It is not limited by weather conditions during operation. High-density polyethylene plastic is low in cost and easy to process and sew, making it easy to promote and use.

[0017] (3) This utility model solves the problem of bagging in scenarios where it is difficult to operate directly, such as near preserved plants, steep slopes, buildings, and artificial mountains, by using a support frame with a V-shaped part, a handle, a pull rope, and a pull ring in cooperation to open and close the bag opening, as well as to fix and detach the bag from the support frame. At the same time, the handle can prevent users from contacting and inhaling herbicides, significantly reducing the impact of herbicides on the health of operators. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the use of the device for targeted removal of invasive trees in garden green spaces according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the planar structure of the device for directional removal of invasive trees in garden green spaces according to an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the assistive device in the embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the fitting of the accessory and the bag body in one embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Covering layer; 2. Slow-release layer; 3. Suture; 4. Trunk; 5. Pull rope; 51. Pull ring; 6. Spreader; 61. Spreader component; 62. Frame; 621. V-shaped part; 7. Handle. Detailed Implementation

[0024] The technical solution and effects of this utility model will be described in detail below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0025] like Figure 1 and Figure 2 As shown, a device for targeted removal of invasive trees in gardens and green spaces includes a bag and a fastening device for securing the bag to a tree trunk 4. The bag includes a covering layer 1, with a slow-release layer 2 sewn into the central region of the covering layer 1 to absorb pesticide solution. To prevent pesticide leakage, the size of the covering layer 1 is smaller than the size of the slow-release layer 2.

[0026] like Figure 2 As shown in the preferred embodiment of this utility model, both the covering layer 1 and the sustained-release layer 2 are circular, and the size of the covering layer 1 is 6 to 10 centimeters larger than the size of the sustained-release layer 2. The covering layer 1 is stitched together with its inner edge pressed against the edge of the sustained-release layer 2, and the diameter of the circle formed by the stitch line 3 is 5 millimeters smaller than the diameter of the sustained-release layer 2.

[0027] Specifically, the diameter of the covering layer 1 is 2 to 3 times the circumference of the target tree trunk 4, ensuring complete coverage with sufficient allowance for stitching. It is sewn using a double-stitched method with 0.2 mm diameter nylon thread that is UV-resistant and anti-aging. The covering layer 1 is a black high-density polyethylene plastic sheet, which prevents moisture loss and, being opaque, inhibits photosynthesis, thus aiding in the killing of pests. Preferably, the thickness of the high-density polyethylene plastic sheet is 0.1 mm to 0.2 mm, balancing durability and fit to the tree trunk 4.

[0028] The sustained-release layer 2 is made of cotton felt with strong adsorption and good liquid retention, which can slowly release the drug and reduce loss. To ensure sufficient drug loading and sustained-release capacity, its thickness is 5 mm to 10 mm.

[0029] Optionally, the sustained-release layer 2 can also be made of thickened needle-punched nonwoven fabric.

[0030] The fastening element passes through the channel formed by the recessed edge of the covering layer 1. Optionally, the fastening element can be a rope or an elastic band.

[0031] Combination Figure 3 , Figure 4 As shown, in an embodiment where the fastening element is an elastic ring, the device further includes an accessory for fitting the bag. The accessory includes a mouth support 6 and a handle 7 to extend the operating distance. The handle 7 is a lightweight rod of 1 to 2 meters. Specifically, it can be a lightweight aluminum alloy tube with a diameter of 25 mm, a length of 1.2 meters, and a wall thickness of 1.5 mm. For short-distance operation, a PVC tube with an outer diameter of 32 mm and a wall thickness of 3 mm can also be used.

[0032] Furthermore, the grip bar 7 can be manufactured into multiple segments that are nested together and are telescopic.

[0033] The support frame 6 includes a support member 61 and a frame body 62. The support member 61 is a C-shaped spring sheet, the lower end of which is bent outward to form a circular channel for the frame body 62 to pass through.

[0034] The frame 62 is made of steel wire and is a circular steel wire loop with an opening. An outwardly protruding V-shaped portion 621 extends from the open end of the frame 62, and this V-shaped portion 621 can extend into the inner cavity of the handle 7. A pull rope 5 is connected to the side of the V-shaped portion 621 away from the open end, and the pull rope 5 passes through the handle 7 and is connected to a pull ring 51. Figure 4 As shown, due to the presence of the circular channel, the supporting force on the support member 61 near the circular channel is greater than the supporting force at the end away from the circular channel. When the support member 61 is in the open state, the bag body can be fixed to the support member 61 by the elastic ring. In use, the circular channel of the support frame 6 is facing down, and the support member 61 is inserted upward to support the bag body.

[0035] When using this device to remove invasive trees, choose a time when the trees are in their vigorous growth period, such as late spring to late summer. Cut the invasive tree, leaving a trunk 4 30 cm to 100 cm high to facilitate operation and provide sufficient sprouting points. The height of the trunk 4 to be retained depends on the specific working environment and tree species. Prepare the appropriate concentration of herbicide according to the usage requirements of the selected systemic herbicide. Slowly and evenly drip the prepared herbicide solution into the central area of ​​the slow-release layer 2, ensuring it is fully absorbed and saturated without dripping, avoiding leakage that could contaminate the outer side of the covering layer 1 and the fastening device. Then, place the bag over the cut end of the trunk 4, with the covering layer 1 on the outside and the slow-release layer 2 on the inside, completely wrapping the trunk 4. Tighten the fastening device at the bag opening to secure it tightly to the invasive tree trunk 4.

[0036] For tree species with thick, smooth, or heavily corky bark, such as mature paper mulberry and some eucalyptus trees, before wrapping with the device, use a knife, axe, or a special bark scraping tool to longitudinally scrape or cut several deep incisions reaching the xylem on the trunk (4), about 10 to 15 cm long and spaced 5 to 10 cm apart, to allow the herbicide to penetrate more quickly. After new buds sprout from the cut surfaces, their upward growth will come into contact with the slow-release layer (2) saturated with systemic herbicide. Absorption by the new buds will cause abnormal growth or growth stagnation, and the herbicide will be systematically translocated to the root system, leading to root necrosis. With the loss of root function, the entire plant dies due to water stress, nutrient deficiency, and the systemic toxicity of the herbicide itself. Protected by the bag, surrounding garden plants will not come into contact with the herbicide and will not be harmed. This allows for the precise removal of invasive trees mixed in with garden plants.

[0037] When an intrusive tree is too close to preserved plants, rocks, or buildings in the surrounding environment, resulting in insufficient operating space, the bag can be secured to the support frame 6. Then, the bag opening is placed downwards onto the tree trunk 4, ensuring the inner slow-release layer 2 is tightly fitted to the cross-section of the trunk 4. The pull rope 5 is then tightened, causing the support frame 6 to retract. Next, the support frame 6 is moved downwards out of the bag, and the bag opening is secured to the trunk 4 by the elastic band. Finally, the pull rope 5 is released, and the V-shaped part 621 extends from the handle 7 under the elastic force, opening the support frame 6 and facilitating its removal from the tree trunk 4.

[0038] It should be noted that, as will be apparent to those skilled in the art, this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. The scope of this utility model is defined by the claims rather than the foregoing description.

Claims

1. A device for targeted removal of invasive trees in gardens and green spaces, characterized in that: Includes a bag body and a fastening device for tightly binding the bag body to the trunk (4), the bag body includes a covering layer (1), the central area of ​​the covering layer (1) near the trunk (4) is sewn with a slow-release layer (2) for absorbing the drug solution, the size of the covering layer (1) is larger than the size of the slow-release layer (2); The coating layer (1) is an opaque plastic sheet used to prevent moisture loss and inhibit photosynthesis; the slow-release layer (2) is made of sheet material with strong adsorption and good liquid retention. The fastening element passes through the channel formed by the inner edge of the covering layer (1) pressing against the edge of the slow-release layer (2) and then sewing it together.

2. The device for directional removal of invasive trees in garden plantings according to claim 1, characterized in that: Both the coating layer (1) and the slow-release layer (2) are circular. The diameter of the coating layer (1) after unfolding is 2 to 3 times the circumference of the target tree trunk (4), and its diameter is 6 to 10 centimeters larger than that of the slow-release layer (2).

3. The device for directional removal of invasive trees in garden plantations according to claim 1 or 2, characterized in that: The covering layer (1) is a black high-density polyethylene plastic sheet, and the slow-release layer (2) is a cotton felt or a thickened needle-punched nonwoven fabric.

4. The apparatus for targeted removal of invasive trees in a landscape according to claim 1, wherein: The fastening element is a tie rope.

5. The apparatus for targeted removal of invasive trees in a landscape according to claim 1, wherein: The fastening element is an elastic ring.

6. The device for targeted removal of invasive trees in gardens and green spaces as described in claim 5, characterized in that: It also includes accessories for packaging bags, the accessories including a mouth support frame (6) and a handle (7) for extending the operating distance; the handle (7) is a lightweight hollow rod, the mouth support frame (6) includes a mouth support (61) and a frame (62), the mouth support (61) is a C-shaped spring sheet, the lower end of which is bent outward to form a circular channel for the frame (62) to pass through; the frame (62) is made of steel wire and is a circular steel wire ring with an opening, the open end of the frame (62) is provided with an outwardly protruding V-shaped part (621); the V-shaped part (621) extends into the inner cavity of the handle (7); a pull rope (5) is connected to the side of the V-shaped part (621) away from the open end, and the pull rope (5) passes through the handle (7) and is connected to a pull ring (51).

7. The device for targeted removal of invasive trees in gardens and green spaces as described in claim 6, characterized in that: The grip (7) is made of lightweight aluminum alloy tube or PVC tube.

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