Axial limiting drill nail for forestry seedling supporting and protecting device

Abstract

An axial limiting drill nail for a forestry nursery stock supporting and protecting device belongs to the field of forestry nursery stock protection and comprises a drill nail rod, a drill nail head and a guide sleeve, the upper end of the drill nail rod is provided with a turning head, the lower end of the drill nail rod is provided with connecting external threads, the drill nail head is a conical structure with a sharp end, wing fins are arranged on the outer circumferential surface of the drill nail head, and an axial blind hole is formed in the upper end face of the drill nail head. Plastic limiting pieces are distributed on the circumferential edge of the upper end face, connecting internal threads are arranged in the axial blind hole, the drill nail head is connected to the lower end of the drill nail rod in a threaded fit mode, the drill nail rod body is sleeved with the guide sleeve in a matched mode, and the lower end of the drill nail rod body is provided with an inverted outer conical guide face. Then the drill nail rod is pulled and rotated to enable the drill nail head to move upwards relative to the drill nail rod, the guide sleeve guides the plastic limiting piece to be radially and obliquely unfolded to form the axial limiting wedge to restrain and limit the axial movement of the axial limiting drill nail, the axial bonding strength of the connecting structural part and the ground is effectively improved, and the firmness and stability of fixing and supporting forestry nursery stocks are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to forestry seedling protection field, concretely relates to a kind of forestry seedling support protection device axial limit peg. BACKGROUND

[0002] Forestry seedling support protection device refers to the structure frame body for supporting and protecting the planted forestry seedling in afforestation, and the new planted forestry seedling is supported by using forestry seedling support protection device, which can prevent the interference and damage of natural environment and climate conditions to the survival and growth state of fragile seedling, enhance the wind resistance and anti-toppling capacity of forestry seedling, avoid the root system from being damaged due to the occurrence of lodging phenomenon, improve the survival rate of forestry seedling, and ensure healthy growth and development. In the prior art, various improved and innovative technical solutions for forestry seedling support protection device have been disclosed. Among them, the combined forestry seedling support protection device generally uses straight rod body shaped support rods to correspondingly combine and balance the support of new planted forestry seedling. Although the stability of the support protection device can be improved by optimizing the rod body structure and combination mode of the support rod to achieve the purpose of balancing and supporting the forestry seedling, the support rod will be pushed to adaptively swing when the forestry seedling is shaken by the wind, thereby exerting a horizontally acting force with a dynamic change in direction on the connecting structure that fixes the support rod. The continuous action will significantly reduce the embedding strength of the connecting structure and the ground, and even cause the support rod and the ground to be disconnected, resulting in the loss of support and protection function of the support protection device. Therefore, it is necessary to research and improve the connecting structure for forestry seedling support protection device to enhance the reliability of the embedding of the connecting structure and the ground, prevent it from being pulled out of the ground, eliminate safety hazards, and solve the problems of the prior art. SUMMARY

[0003] The utility model aims at providing a kind of forestry seedling support protection device axial limit peg, which enhances the firmness and stability of the support protection device for fixing and supporting forestry seedling, and improves the reliability of safety protection for forestry seedling.

[0004] An axially limiting pin for a forestry seedling support and protection device includes: a pin rod, a pin head, and a guide sleeve. The upper end of the pin rod has a swivel head, and the lower end has an external thread. The pin head is a conical structure with a sharp tip at the lower end. Axially arranged winglets are provided on the outer circumferential surface of the conical structure. An axial blind hole is provided on the upper end surface of the conical structure along its central axis. Plastic limiting pieces are distributed along the circumferential edge of the upper end surface. A fitting for the pin is provided within the axial blind hole. The rod is connected to an external thread structure with a corresponding internal thread. The drill bit head is coaxially connected to the lower end of the drill bit rod via a threaded connection. The guide sleeve is a cylindrical sleeve that fits onto the rod body of the drill bit rod. An inverted outer conical guide surface is provided at the lower end of the cylindrical sleeve. The inverted outer conical guide surface can guide the plastic limiting piece to produce radial outward deformation. The outer diameter specification of the guide sleeve corresponds to the structure of the drill bit head and can be combined with the drill bit head to form an axially limiting drill bit rod body with continuous outer circumferential surface connection.

[0005] The axial limiting drill bit used in the forestry seedling support and protection device preferably has a reverse thread on the outer circumference of the guide sleeve. After the axial limiting drill bit is embedded in the ground, when the drill bit rod is rotated, the drill bit head will interact with the guide sleeve. The reverse thread not only increases the engagement strength between the guide sleeve and the ground, preventing the guide sleeve from coming off the ground, but also, when the guide sleeve rotates coaxially with the drill bit rod, the reverse thread can interact with the ground to make the guide sleeve move downward relative to the ground, thereby increasing the interaction strength between the guide sleeve and the drill bit head. At the same time, it can further prevent the guide sleeve from coming off the ground, ensuring the stability and reliability of the axial limiting drill bit in the ground embedded state.

[0006] The axial limiting drill bit used in the forestry seedling support and protection device preferably has a limiting washer provided at the upper end of the guide sleeve. The area of ​​the limiting washer is not less than the cross-sectional area of ​​the rotating head at the upper end of the drill bit rod, and the lower end face of the rotating head is in a corresponding fit with the limiting washer. This increases the frictional force between the rotating head and the guide sleeve, thereby increasing the tendency of the guide sleeve to rotate coaxially with the drill bit rod, and providing a guarantee for the realization of the function of the axial limiting drill bit.

[0007] The axial limiting pin of the forestry seedling support and protection device preferably has a sharp edge on the front end of the plastic limiting plate. The sharp edge can improve the coordination between the plastic limiting plate and the guide sleeve, and can also guide the plastic limiting plate to extend into the soil after it is radially unfolded, reducing the resistance of the extension movement and ensuring the realization of the functional structure.

[0008] The axial limiting drill bit of the forestry seedling support and protection device preferably has a coaxial extended protective sleeve at the upper end of the drill bit head. The outer circumferential diameter of the extended protective sleeve corresponds to the inner circumferential diameter of the guide sleeve. By utilizing the corresponding fit between the extended protective sleeve and the guide sleeve, as well as between the limiting washer and the drill bit rod, the connecting external thread on the drill bit rod can be enclosed in the closed space within the guide sleeve. In use, this isolates the connecting external thread from the external underground soil, protecting the structural fit between the connecting external thread and the connecting internal thread on the drill bit rod, and ensuring the stable and reliable function of the axial limiting drill bit.

[0009] The beneficial effects of this utility model are that it provides an axial limiting screw for a forestry seedling support and protection device. The screw, consisting of a screw rod, a screw head, and a guide sleeve, forms an axial limiting screw with a continuous outer circumferential surface. In use, the axial limiting screw is pre-impact-embedded into the support rod of the ground-fixed support and protection device. Then, by rotating the wrench on the screw rod, the screw head moves upward relative to the screw rod. The guide sleeve guides the plastic limiting piece on the screw head to radially tilt and unfold, forming an axial limiting wedge. This constrains and restricts the axial movement of the axial limiting screw in the vertical direction. It replaces traditional screws as a connecting structural component for the support rod of a combined forestry seedling support and protection device, effectively improving the axial bonding strength between the connecting structural component and the ground. Even if the connection between the connecting structural component and the ground becomes loose, the axial limiting screw will not easily detach axially from the ground, but will continue to maintain the support and protection function of the support and protection device. This enhances the firmness and stability of the fixed support for forestry seedlings and improves the reliability of safety protection for forestry seedlings. Attached Figure Description

[0010] Figure 1 A basic structural diagram of axial limiting pins used in forestry seedling support and protection devices.

[0011] Figure 2 for Figure 1 Sectional view of section AA.

[0012] Figure 3 for Figure 1 Sectional view of section BB.

[0013] Figure 4 A diagram showing the axial limiting screw structure for supporting and protecting forest seedlings.

[0014] Figure 5 for Figure 4 Sectional view of the CC section.

[0015] Among them: 1 is the drill rod, 2 is the drill head, 3 is the guide sleeve, 4 is the plastic limiting plate, 5 is the sharp blade, 6 is the wing plate, 7 is the reverse thread, 8 is the extension protective sleeve, 9 is the limiting washer, and 10 is the ground mat. Detailed Implementation

[0016] Furthermore, the technical solution for which protection is sought in this utility model will be described in detail below with reference to specific embodiments and accompanying drawings.

[0017] An axial limiting pin for a forestry seedling support and protection device, such as Figures 1 to 5 As shown, the device consists of a drill rod 1, a drill head 2, and a guide sleeve 3. The upper end of the drill rod 1 is equipped with a hexagonal wrench head, and the lower end has an external thread. The drill head 2 is a conical structure with a sharp tip at the lower end. Six wing blades 6 are evenly distributed along the circumferential cross-section on the inner and outer circumferential surfaces of the cone tip area of ​​the drill head 2. An axial blind hole is formed on the upper end surface, and an extension protective sleeve 8 is coaxially arranged there. The outer circumferential diameter of the extension protective sleeve 8 is the same as the inner circumferential diameter of the guide sleeve 3 and fits into the inner circumferential hole of the guide sleeve 3. At the same time, eight plastic grooves are also distributed on the circumferential edge of the upper end surface. The limiting plate 4 is a plastic limiting plate evenly distributed along the circumference. Each end of the limiting plate 4 has a sharp blade 5. The axial blind hole has an internal thread corresponding to the external thread structure. The drill bit 2 is coaxially connected to the lower end of the drill bit rod 1 through a threaded fit. The guide sleeve 3 is a cylindrical sleeve with the same outer diameter as the upper diameter of the drill bit 2. It fits onto the rod of the drill bit rod 1. A limiting washer 9 is provided at the upper end of the guide sleeve 3. A reverse thread 7 is provided on the outer circumference surface. An inverted outer conical guide surface is provided at the lower end. The area of ​​the limiting washer 9 is larger than the area of ​​the lower end surface of the wrench head.

[0018] The following is an example of a forestry seedling support and protection device using axial limiting screws for fixing the support and protection device: After assembling the modular support and protection device into a complete support structure for the corresponding forestry seedlings, lay the ground mats 10 on each support rod flat on the ground at the support positioning point. Then, sequentially... Figure 1The axially limiting drill bits, as shown in the basic structural state, are impacted and embedded into the ground through the drill bit holes in the ground pad 10, locking and fixing the ground pad 10. Then, a turning tool is used to sequentially turn the turning heads on the drill bit rod 1. Because the drill bit head 2, embedded in the ground, has wing plates 6 that restrict its rotational freedom, turning the drill bit rod 1 allows the drill bit head 2, which is threadedly connected to it, to move axially upward relative to the drill bit rod 1. During the upward movement of the drill bit head 2, the plastic limiting plate 4, provided on the upper end face of the drill bit head 2, will radially deform and unfold under the guidance of the inverted outer conical guide surface provided at the lower end of the guide sleeve 3. Simultaneously, utilizing the guiding effect of the sharp edge 5 at the front end of the plastic limiting plate 4, it inserts into the soil around the outside of the axially limiting drill bit as the drill bit head 2 continues to move upward. After the drill bit head 2 has fully moved upward, the eight plastic limiting plates 4 unfold in a flower shape relative to the drill bit head 2, transforming the axially limiting drill bit into a shape resembling a flower. Figure 4 The limiting structure shown utilizes the plastic limiting plate 4 embedded in the soil as a limiting wedge to restrict the axial movement of the axial limiting pin. Therefore, even if the axial limiting pin loosens due to the continuous dynamic swaying of the forestry seedlings, the plastic limiting plate 4 prevents the axial limiting pin from axially disengaging from the ground. This allows the supporting rod of the supporting and protective device to remain fixed, maintaining its supporting and protective function. This enhances the firmness and stability of the fixed support for the forestry seedlings, improving the reliability of safety protection.

Claims

1. An axial limiting pin for a forestry seedling support and protection device, characterized in that, include: The component comprises a drill rod (1), a drill head (2), and a guide sleeve (3). The drill rod (1) has a swivel head at its upper end and an external thread at its lower end. The drill head (2) is a conical structure with a sharp tip at its lower end. A wing (6) is arranged axially on the outer circumferential surface of the conical structure. An axial blind hole is provided on the upper end surface of the conical structure along the central axis. Plastic limiting pieces (4) are distributed on the circumferential edge of the upper end surface. A connection structure with the external thread on the drill rod (1) is provided in the axial blind hole. The corresponding internal thread is used for connection. The drill bit head (2) is coaxially connected to the lower end of the drill bit rod (1) through threaded engagement. The guide sleeve (3) is a cylindrical sleeve that fits onto the rod body of the drill bit rod (1). An inverted outer conical guide surface is provided at the lower end of the cylindrical sleeve. The inverted outer conical guide surface can guide the plastic limiting piece (4) to produce radial outward deformation. The outer diameter specification of the guide sleeve (3) corresponds to the structure of the drill bit head (2). It can be combined with the drill bit head (2) to form an axially limiting drill bit rod body with continuous outer circumferential surface docking.

2. The axial limiting pin for a forestry seedling support and protection device as described in claim 1, characterized in that: A reverse thread (7) is provided on the outer circumferential surface of the guide sleeve (3).

3. The axial limiting pin for a forestry seedling support and protection device as described in claim 2, characterized in that: A limiting gasket (9) is provided at the upper end of the guide sleeve (3). The area of ​​the limiting gasket (9) is not less than the cross-sectional area of ​​the rotating head at the upper end of the chisel rod (1) and the lower end face of the rotating head is in a corresponding fit with the limiting gasket (9).

4. The axial limiting pin for a forestry seedling support and protection device as described in claim 3, characterized in that: A coaxial extended protective sleeve (8) is provided at the upper end of the drill bit head (2). The outer circumferential diameter of the extended protective sleeve (8) corresponds to the inner circumferential diameter of the guide sleeve (3). By utilizing the corresponding cooperation between the extended protective sleeve (8) and the guide sleeve (3), as well as the limiting washer (9) and the drill bit rod (1), the connecting external thread on the drill bit rod (1) can be enclosed in the closed space inside the guide sleeve (3). In use, the connecting external thread can be isolated from the underground soil.

5. An axial limiting pin for a forestry seedling support and protection device as described in any one of claims 1 to 4, characterized in that: A sharp edge (5) is provided on the front end of the plastic limiting piece (4).

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