Integrated nail shell and integrated nail

Abstract

The utility model provides an integrated nail shell which comprises a shoot nail, a shoot nail seat and a shoot nail cap, one end of the shoot nail seat is connected with the shoot nail, the other end of the shoot nail seat is provided with an installation hole used for installing the shoot nail cap, the bottom of the installation hole is provided with an energy gathering cavity formed in a concave mode, and the energy gathering cavity is of a space axial symmetry structure. The axis of the energy gathering cavity is consistent with the axis of the shoot nail, the shoot nail cap is provided with a grain cavity used for containing a grain, the integrated nail shell aims to overcome the defects in the prior art, the integrated nail shell capable of generating strong impact force is provided, and in addition, the integrated nail with the integrated nail shell structure is further provided.

Description

Technical Field

[0001] The utility model specifically relates to an integrated nail shell and also relates to an integrated nail. Background Art

[0002] An integrated nail is an integrated product that integrates a fuel tablet and a nail through a plastic nail seat. When in use, a dedicated integrated nail fastener is used to fire the fuel tablet therein. The fuel tablet generally uses flammable and explosive materials such as gunpowder. When the fuel tablet is excited, a chemical explosion occurs, releasing energy, and then the nail is directly nailed into substrates such as steel, concrete, brick masonry or rock, to permanently or temporarily fix components to be fixed, such as pipes, steel parts, doors and windows, brackets, etc. The structure can refer to the patent solution of a bolt plastic shell integrated nail with the Chinese patent publication number CN213575029U and the name of an anchor bolt plastic shell integrated nail. During actual use, the integrated nail is placed in the anti-explosion cavity of the integrated nail fastener. When a chemical explosion occurs in the nail seat, the pressure wave generated is transmitted in all directions, and then the nail seat is squeezed in all directions. Since the nail seat is in contact with the anti-explosion cavity around it, most of the impact force is transmitted to the nail, thus ejecting the nail. However, in this process, the pressure wave generated by the explosion first squeezes the cavity of the nail seat outward until the material wrapping the nail is torn, and finally the nail is ejected from the nail seat by the impact force generated by the pressure wave. During the process, the squeezing and tearing of the pressure wave on the nail seat will cause energy loss. On the one hand, during use, due to the strong impact force, huge noise and vibration are generated, and the energy loss of the pressure wave will ultimately lead to a decrease in the ejection speed of the nail, thereby affecting the effect of the nail being nailed into the substrate.

[0003] The present utility model is precisely produced based on the above deficiencies. Content of the Utility Model

[0004] The purpose of the present utility model is to overcome the deficiencies of the prior art and provide an integrated nail shell that can generate a strong impact force.

[0005] The present utility model is realized through the following technical solutions:

[0006] The present utility model provides an integrated nail shell, including a nail, a nail seat and a nail cap. One end of the nail seat is connected to the nail, and the other end of the nail seat is provided with an installation hole for installing the nail cap. The bottom of the installation hole is provided with a downwardly concave energy-gathering cavity. The energy-gathering cavity is a space axisymmetric structure, and the axis of the energy-gathering cavity is consistent with the axis of the nail. The nail cap is provided with a medicine column cavity for placing a medicine column.

[0007] For the integrated nail shell as described above, the energy-gathering cavity and the medicine column cavity are interconnected.

[0008] For the integrated nail shell as described above, a transition section is provided between the energy-gathering cavity and the installation hole.

[0009] The integrated nail shell as described above is characterized in that the cross-sectional area of the energy-gathering cavity has the following rule: in the energy-gathering cavity, the cross-sectional area at a distance La from the nail head is Sa, and the cross-sectional area at a distance Lb from the nail head is Sb. If La is less than Lb, then Sa is less than or equal to Sb.

[0010] For the high-impact integrated nail as described above, the distance between the position with the minimum cross-sectional area of the energy-gathering cavity and the nail head is H, and 0.5mm ≤ H ≤ 2.5mm.

[0011] The integrated nail shell as described above, the energy-gathering cavity is one or a combination of a conical cavity, a frustum of a cone cavity, a pyramid cavity, a frustum of a pyramid cavity, a cylindrical cavity, and a stepped cylindrical cavity.

[0012] The integrated nail shell as described above, a positioning step for restricting the movement of the propellant charge is provided on the inner side wall of the mounting hole.

[0013] The integrated nail shell as described above, the outer wall diameter of the nail seat is 7 mm to 9 mm.

[0014] The present utility model further provides an integrated nail, including the integrated nail shell as described above, and a propellant charge is placed in the propellant charge cavity.

[0015] For the integrated nail as described above, the height of the propellant charge is greater than the height of the propellant charge cavity.

[0016] For the integrated nail as described above, the height of the propellant charge is greater than the height of the propellant charge cavity.

[0017] Compared with the prior art, the present utility model has the following advantages:

[0018] 1. The integrated nail shell of the present utility model is provided with a concave energy-gathering cavity at the bottom of the groove of the mounting hole. In this way, when the fuel tablets in the propellant charge cavity undergo a chemical explosion, the high-pressure gas generated by the explosion instantly enters the energy-gathering cavity, and then tears preferentially at the position where stress concentration occurs in the energy-gathering cavity, so that the pressure wave reaches the head of the nail faster, thereby reducing the energy consumed by squeezing and tearing the nail cap and the nail seat, ensuring that the nail is impacted with a relatively high energy, and then increasing the ejection speed of the nail.

[0019] 2. A preferred solution of the present utility model is that the energy-gathering cavity is a conical cavity section, and the small end of the conical section cavity faces the nail, so that the pressure wave in the energy-gathering cavity preferentially generates stress concentration at the small end of the conical section, causing the material part adhered near the nail to be damaged preferentially and quickly after the fuel tablets explode, thereby reducing the resistance of the nail to break away from the nail seat, and at the same time making the pressure wave generated by the explosion reach the head of the nail faster, thereby providing the impact force of the shock wave hitting the nail. Description of the Drawings

[0020] Figure 1 is a schematic structural view of the integral nail shell of the first embodiment;

[0021] Figure 2 is a schematic sectional view of the integral nail shell of the first embodiment;

[0022] Figure 3 is an exploded schematic view of the integral nail shell of the first embodiment;

[0023] Figure 4 is a schematic structural view of the integral nail shell of the second embodiment;

[0024] Figure 5 is a schematic structural view of the integral nail shell of the third embodiment;

[0025] Figure 6 is a schematic structural view of the integral nail shell of the fourth embodiment;

[0026] Figure 7 is a schematic structural view of the integral nail shell of the fifth embodiment. Detailed implementation manners

[0027] The present utility model will be further described below with reference to the accompanying drawings:

[0028] The orientations described in the specification of the present utility model, such as "upper", "lower", "left", "right", "front", "rear", etc., are all based on the orientations of the accompanying drawings and are for the purpose of facilitating the description of the relationships between various components. In this embodiment, the upstream of the long pipe fitting transportation is the front, the downstream of the long pipe fitting transportation is the rear, and the vertical direction of the long pipe fitting transportation direction is the left and right direction. It does not indicate the only or absolute positional relationship between various components, but only one implementation manner for realizing the utility model, and it is not a limitation on its implementation manner.

[0029] Embodiment 1:

[0030] This embodiment provides an integral nail shell. As Figures 1 to 3 shown, this kind of integral nail includes a nail seat 1. One end of the nail seat 1 is connected with a nail 2. The other end of the nail seat 1 is provided with an installation hole 10. The nail seat 1 is provided with a nail cap 3 for covering the installation hole 10 in the installation hole 10. As Figure 2As shown in the figure, the nail seat 1 is connected to the upper part of the nail 2 and wraps the head of the nail 2. The nail cap 3 is arranged on the upper part of the nail seat 1. The opening of the nail cap 3 faces and matches the mounting hole 10, so that the inner cavity of the nail cap 3 is a charge cavity 31. The charge 4 (i.e., fuel tablet) for chemical explosion is loaded in the charge cavity 31. A concave energy-gathering cavity 121 that communicates with the charge cavity 31 is provided at the bottom of the mounting hole to accommodate the gas generated during the explosion. The energy-gathering cavity 121 is a space axisymmetric structure, and the axis of the energy-gathering cavity 121 coincides with the axis of the nail 2. As shown in Figure 2, in this embodiment, the axis is the axis P, and the energy-gathering cavity 121 is symmetric about the axis P. In this way, when the charge 4 in the charge cavity 31 undergoes a chemical explosion, the high-pressure gas generated by the explosion instantly enters the energy-gathering cavity 121, and then tears preferentially at the position where stress concentration occurs in the energy-gathering cavity 121, so that the pressure wave reaches the head 21 of the nail 2 faster, thereby reducing the energy consumed by squeezing and tearing the nail cap 3 and the nail seat 1, ensuring that the nail 2 is impacted with higher energy, and then increasing the ejection speed of the nail 2. Of course, the charge cavity 31 can also be a closed structure, wrapping the charge 4 therein, so that the charge cavity 31 is not connected to the energy-gathering cavity 121.

[0031] As a preferred solution, as Figure 2 shown, the energy-gathering cavity 121 is a conical cavity section. The small end of the energy-gathering cavity 121 faces the nail 2, so that stress concentration is preferentially generated at the small end of the energy-gathering cavity 121, and this part tears preferentially and quickly after the charge 4 explodes, so that the adhered material part near the nail 2 is damaged, thereby reducing the resistance of the nail 2 to break away from the nail seat 1. At the same time, the pressure wave generated by the explosion reaches the head 21 of the nail 2 faster, thereby providing the impact force of the shock wave hitting the nail 2.

[0032] In this embodiment, the energy-gathering cavity 121 is conical. Of course, other symmetric and caliber-changing shapes can also be used, such as a combination of one or more of a conical cavity, a frustum cavity, a pyramid cavity, a frustum pyramid cavity, a cylindrical cavity, and a stepped cylindrical cavity, as long as the cross-sectional area of the energy-gathering cavity 121 gradually decreases in the direction approaching the nail 2. In other words, the cross-sectional area of the energy-gathering cavity 121 has the following rule: in the energy-gathering cavity, the cross-sectional area at a distance La from the head 21 of the nail 2 is Sa, and the cross-sectional area at a distance Lb from the head 21 of the nail 2 is Sb. If La is less than Lb, then Sa is less than or equal to Sb.

[0033] As a preferred solution, as Figure 2 shown, a transition section 122 is provided between the energy-gathering cavity 121 and the mounting hole 10. As a further optimization, as Figure 2As shown, the mounting hole 10 of the nail seat 1 is cylindrical, and the diameter of the transition section 122 is smaller than that of the mounting hole 10, so that a positioning step 11 for restricting the movement of the propellant charge is formed between the transition section 122 and the mounting hole 10, and the positioning step 11 forms a supporting effect on the bottom of the propellant charge 4. Of course, it is also possible not to provide the transition section 122 and only provide the shaped charge cavity 121.

[0034] As a preferred solution, as Figure 2 shown, a primer groove 32 is provided on the inner wall of the top of the propellant charge cavity 31, the axis of the primer groove passes through the primer groove 32, a firing groove 33 is provided on the top of the nail cap 3, the axis of the nail cap 3 passes through the firing groove 33, and the outer wall diameter of the nail seat 1 is 7 mm to 9 mm. Preferably, the outer wall diameter of the nail seat 1 is 7.3 mm or 8.5 mm.

[0035] As a further preferred solution, as Figure 2 shown, the small end of the shaped charge cavity 121 has a flat cut angle 123, the width of the cut angle is L, and L≤0.5 mm, and the cut angle 123 is a flat surface instead of a sharp surface, so that a more regular and more concentrated shock wave is formed at this place, preventing the unbalanced impact force from affecting the stability of the nail 2 being ejected.

[0036] As a further preferred solution, as Figure 2 shown, the distance between the smallest cross-sectional area (i.e., the small end of the shaped charge cavity 121) of the shaped charge cavity 121 and the nail 2 is H, and 0.5 mm≤H≤2.5 mm. When H is greater than 2.5 mm, the distance between the small end of the shaped charge cavity 121 and the nail 2 is relatively far, and it is difficult to preferably tear the material at this place at the beginning of the explosion. When H is less than 0.5 mm, it affects the stability of the impact force formed on the head 211 of the nail 2.

[0037] Preferably, as shown, the nail cap 3 and the mounting hole 10 are in a shape-matching relationship, and there is an interference fit between the nail cap 3 and the side wall of the mounting hole 10, so that it will not fall off due to transportation, vibration, etc., and the safety and stability are better.

[0038] In order to reduce the resistance of the nail 2 when detaching from the nail seat 1, as Figure 2 shown, an arc-shaped transition surface 211 is provided on the side of the head 21 of the nail 2 away from the propellant charge cavity 31.

[0039] Preferably, as Figure 2 and Figure 3 shown, the nail 2 has a flat head 21, and the nail seat 1 wraps the head 21 of the nail 2. As the head 21 of the nail 2, it is set as a flat cylinder, which is beneficial to forming a more regular and more concentrated shock wave and improving the impact force and stability of the nail 2 being ejected.

[0040] Preferably, the nail seat 1 is made of plastic, and the nail 2 is made of metal. The nail seat 1 and the nail 2 are an integral structure formed by in-mold injection molding, making the connection between the nail seat 1 and the nail 2 more stable, preventing criminals from removing the power source 6 for other uses, and making it safer to use.

[0041] Embodiment 2:

[0042] This embodiment provides an integrated nail shell, as Figure 4 shown. The difference between this kind of integrated nail and Embodiment 1 is that the entire section of the energy concentrating cavity 121 is the energy concentrating cavity 121. The energy concentrating cavity 121 is arranged at the bottom of the groove of the installation hole 10 of the nail seat 1, and there is no transition section 122 between the energy concentrating cavity 121 and the installation hole 10.

[0043] Embodiment 3:

[0044] This embodiment provides an integrated nail shell, as Figure 5 shown. The difference between this kind of integrated nail and Embodiment 1 is that the lower end of the energy concentrating cavity 121 is not conical. The lower end of the energy concentrating cavity 121 is a curved surface section 123, and the curved surface 123 is a spherical surface or an ellipsoidal surface. At the same time, there is a transition section 122 between the curved surface section 123 and the installation hole 10. Of course, there may also be no transition section 122 between the curved surface section 123 and the installation hole 10.

[0045] Embodiment 3:

[0046] This embodiment provides an integrated nail shell, as Figure 6 shown. The difference between this kind of integrated nail and Embodiment 1 is that the transition section 122 is in the shape of a polygonal prism, and the energy concentrating cavity 121 is in the shape of a polygonal pyramid. Of course, the transition section 122 may also not be provided.

[0047] Embodiment 4:

[0048] This embodiment provides an integrated nail shell, as Figure 7 shown. The difference between this kind of integrated nail and Embodiment 1 is that the lower end of the energy concentrating cavity 121 is not conical. The lower end of the energy concentrating cavity 121 is a curved surface section 123. Preferably, the curved surface section 123 is an irregular curved surface with a gradually decreasing cross-sectional area from top to bottom.

[0049] Embodiment 5:

[0050] This embodiment provides an integrated nail, which adopts the structure of an integrated nail shell in one of Embodiments 1 to 4, and a propellant charge 4 is placed in the propellant charge cavity 31. Preferably, as Figure 2As shown, the height of the propellant charge 4 is greater than the height of the propellant charge cavity 31, so that the propellant charge 4 can form a supporting fit with the positioning step 11.

[0051] The above are only embodiments of the present invention. Common knowledge such as specific structures and characteristics known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. An integrated nail shell, characterized in that: It includes a nail (2), a nail base (1) and a nail cap (3). One end of the nail base (1) is connected to the nail (2), and an installation hole (10) for installing the nail cap (3) is provided at the other end of the nail base (1). A concave-shaped energy concentrating cavity (121) is provided at the bottom of the installation hole (10). The energy concentrating cavity (121) is a spatially axisymmetric structure, and the axis of the energy concentrating cavity (121) is consistent with the axis of the nail (2). The nail cap (3) is provided with a charge cavity (31) for placing a charge.

2. The integrated nail shell according to claim 1, wherein: The energy concentrating cavity (121) and the charge cavity (31) are interconnected.

3. The integrated nail shell according to claim 2, characterized in that: A transition section (122) is provided between the energy concentrating cavity (121) and the installation hole (10).

4. The integrated nail shell according to any one of claims 1 to 3, characterized in that, The cross-sectional area of the energy concentrating cavity (121) has the following rule: In the energy concentrating cavity, the cross-sectional area at a distance La from the head of the nail is Sa, and the cross-sectional area at a distance Lb from the head of the nail is Sb. If La is less than Lb, then Sa is less than or equal to Sb.

5. The integrated nail shell according to claim 4, wherein: The distance between the position where the cross-sectional area of the energy concentrating cavity (121) is the smallest and the head (21) of the nail (2) is H, and 0.5mm ≤ H ≤ 2.5mm.

6. The integrated nail shell according to claim 4, wherein: The energy concentrating cavity (121) is one or a combination of a conical cavity, a frustum-shaped cavity, a pyramidal cavity, a frustum-shaped pyramid cavity, a cylindrical cavity, and a stepped cylindrical cavity.

7. The integrated nail shell according to any one of claims 1 to 3, characterized in that: A positioning step (11) for restricting the movement of the charge is provided on the inner side wall of the installation hole (10).

8. The integrated nail shell according to any one of claims 1 to 3, characterized in that: The outer wall diameter of the nail base (1) is 7 mm to 9 mm.

9. An integrated nail, characterized in that: It includes the integrated nail shell according to any one of claims 1 to 8, and a charge is placed in the charge cavity (31).

10. The integrated nail according to claim 9, characterized in that: The height of the charge is greater than the height of the charge cavity (31).

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