Nail shooting pill with sealing device

Abstract

The utility model belongs to the technical field of shoot nail fastening, and discloses a shoot nail pill with a sealing device, which comprises a pill case, one axial end of the pill case is a firing end, one end of the pill case far away from the firing end is a firing end, the firing end is connected with an end cover, the end cover is connected with a firing mechanism, the firing end is provided with a firing port, and the inner wall of the firing port is connected with a rupture disk. The cartridge case is filled with propellant powder and connected with a plurality of sets of sealing rings. The nail gun can be tightly attached to the inner wall of the gun barrel of the nail gun, gas is prevented from flowing in a gap between the cartridge case and the gun barrel, energy generated by combustion can act on the nail pushing process in a more concentrated mode, the shooting efficiency is improved, and abnormal sound and vibration caused by gas leakage are reduced.

Description

Technical Field

[0001] This utility model relates to the field of nail fastening technology, and in particular to a nail cartridge with a sealing device. Background Technology

[0002] Gunpowder nail fastening equipment includes three product series: nail cartridges, nail guns, and nails. Its basic principle is to use a nail gun to strike the base of the nail cartridge, igniting the propellant inside. This generates a powerful driving force, propelling the nail into the substrate, thus achieving the purpose of securing the nail. Due to its advantages such as ease of use and good fastening effect, it is widely used in construction, decoration, metallurgy, chemical industry, underwater operations, and other fields.

[0003] A search of Chinese utility model patents (publication number CN221677073U) reveals a nitrocellulose-type nail gun cartridge, comprising a shell, nitrocellulose, a firing part, a firing through hole, and a sealing element. The shell is a one-piece molded structure that can be achieved through a stamping process, eliminating the need for a sealing process, thus saving steps and processing costs, and facilitating the rapid processing and molding of nitrocellulose-type nail gun cartridges.

[0004] However, practical application has revealed that this technical solution still has at least the following drawbacks:

[0005] After a nail cartridge is loaded into a nail gun, a gap is formed between its front side and the internal cavity of the nail gun. When the cartridge is fired, the internal gas flows in this gap. When the flow velocity exceeds a certain threshold, turbulence is generated. Turbulence causes gas molecules to collide and vibrate violently, thus generating noise. Utility Model Content

[0006] The present invention aims to provide a nail gun cartridge with a sealing device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A nail gun cartridge with a sealing device includes a cartridge case, one axial end of which is a firing end and the other axial end of which is a launching end. The firing end is connected to an end cap, and the end cap is connected to a firing mechanism. The launching end has a launching port, and a rupture disc is connected to the inner wall of the launching port. The cartridge case is filled with propellant, and the cartridge case is connected to a sealing ring, which has several sets.

[0009] Preferably, the sealing ring is made of a thermally expanding material.

[0010] Preferably, the rupture disc has a conical groove.

[0011] Preferably, the propellant is nitrocellulose.

[0012] Preferably, the firing mechanism includes a conical block, the end cap has a firing port, the conical block is slidably connected to the inner wall of the firing port, the inner wall of the firing port has a groove, the conical block is connected to a slider, the slider is slidably connected to the groove, the inner wall of the groove is connected to a spring, and the other end of the spring is connected to the slider.

[0013] Preferably, the cartridge case is connected to a moisture-proof film.

[0014] The beneficial effects of this technical solution compared to existing technologies are as follows:

[0015] (1) This technical solution, by setting several sets of sealing rings, can tightly fit the inner wall of the nail gun barrel, preventing gas from flowing in the gap between the cartridge case and the barrel and generating noise. Furthermore, the elastic deformation capability of the sealing rings can compensate for the machining tolerances of the cartridge case and the barrel. Even if there are slight dimensional deviations, a tight fit can still be achieved through extrusion deformation, improving the product's adaptability to different equipment. In addition, the multiple sealing design can slow down the gas escape rate, allowing the energy generated by combustion to act more concentratedly on the nail propulsion process, ensuring stable nail penetration capability.

[0016] (2) By setting a sealing ring made of thermal expansion material, the high temperature generated by the combustion of the propellant can rapidly expand at the moment the nail gun is fired. After the sealing ring expands in volume, it tightly fills the tiny gap between the cartridge case and the barrel, forming a more airtight sealing structure than at room temperature.

[0017] (3) By setting a conical groove, the tip of the conical groove faces the propellant to form a stress concentration point, so that when the rupture disc is subjected to the high-pressure gas generated by combustion, it can precisely break from the central area, avoiding delayed detonation or abnormal opening caused by uneven pressure distribution, and ensuring stable and controllable firing timing. At the same time, the conical groove guides the gas to converge towards the center and then sprays it out radially, so that the airflow thrust acts more concentratedly on the tail of the nail, reducing energy dispersion and nail deviation risk, and improving the stability of the firing direction.

[0018] (4) By using nitrocellulose as the propellant, compared with traditional black powder, nitrocellulose combustion leaves almost no solid residue, with the main products being gaseous substances. This can significantly reduce carbon buildup and corrosion in the barrel, extending the maintenance cycle of the nail gun. It can also reduce harmful gas emissions, improve the working environment, and meet the environmental protection requirements of modern industry. Furthermore, nitrocellulose has good chemical stability, maintaining stable energy output whether in outdoor construction in low-temperature environments or industrial furnace operations in high-temperature environments.

[0019] (5) By setting a conical block, the external force is concentrated at the tip through the conical surface during firing, and the pressure is amplified by the tip effect, ensuring that even a small firing energy can quickly ignite the propellant, thus improving firing reliability. The sliding fit between the slider and the groove provides rigid guidance for the conical block, ensuring that it moves linearly along the axial direction during firing and avoiding firing position deviations caused by tilting or offset. By setting a spring, the position of the conical block can be limited, preventing the conical block from contacting the propellant when not firing.

[0020] (6) By setting up a moisture-proof membrane, a physical barrier is formed, which can prevent external moisture from seeping in through the gap between the firing port and the cone block, ensuring firing reliability under long-term storage or complex working conditions. Attached Figure Description

[0021] Figure 1 A front sectional view provided for this utility model;

[0022] Figure 2 for Figure 1 Enlarged view of point A;

[0023] Reference numerals: 1. cartridge case; 2. firing end; 3. end cap; 4. moisture-proof membrane; 5. propellant; 6. firing port; 7. conical groove; 8. rupture disc; 9. firing end; 10. sealing ring; 11. firing port; 12. conical block; 13. slider; 14. groove; 15. spring. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0025] like Figure 1-2 The nail gun cartridge shown includes a cartridge case 1, with one axial end of the cartridge case 1 serving as the firing end 2 and the other end of the cartridge case 1 away from the firing end 2 serving as the launching end 9. The cartridge case 1 is filled with propellant 5, which is nitrocellulose. The launching end 9 has a launching port 6, and a rupture disc 8 is connected to the inner wall of the launching port 6. A conical groove 7 is formed at the center of the rupture disc 8 near the propellant 5.

[0026] like Figure 1-2 As shown, the firing end 2 is connected to an end cap 3, and the end cap 3 is connected to a firing mechanism, which includes a conical block 12. A firing port 11 is formed in the middle of the end cap 3. The conical block 12 is slidably connected to the inner wall of the firing port 11, with the tip of the conical block 12 facing the inside of the cartridge case 1. A groove 14 is formed on the inner wall of the firing port 11. A slider 13 is connected to the side wall of the conical block 12, and the slider 13 is slidably connected to the groove 14. A spring 15 is connected to the bottom wall of the groove 14, and the other end of the spring 15 is connected to the top wall of the slider 13. When the spring 15 is in equilibrium, the conical block 12 is completely located within the firing port 11, away from the propellant 5. A moisture-proof film 4 is connected to the inner wall of the cartridge case 1, located between the end cap 3 and the propellant 5.

[0027] like Figure 1 As shown, several sets of sealing rings 10 are connected to the outer wall of the cartridge case 1 near the firing end 9. The sealing rings 10 are made of thermally expanding material.

[0028] When the firing pin of the nail gun strikes the conical block 12 of the firing mechanism, the conical block 12 overcomes the resistance of the spring 15 and slides into the cartridge case 1 along the groove 14 on the inner wall of the firing port 11. During this process, the tip of the conical block 12 breaks the moisture-proof membrane 4 and impacts the propellant 5, causing it to burn. Due to the tip design of the conical block 12, the impact force is concentrated, ensuring reliable ignition of the nitrocellulose. The combustion of the nitrocellulose produces a large amount of high-temperature and high-pressure gas, which accumulates inside the cartridge case 1, and the pressure gradually increases. Because the conical groove 7 is located near the propellant 5 at the center of the rupture disc 8, this becomes a stress concentration point. Under the action of gas pressure, the rupture disc 8 first ruptures from the conical groove 7, and the high-pressure gas is rapidly ejected through the rupture opening, pushing the nail out of the firing port 6. At the moment of firing, the high temperature generated by the combustion of the propellant 5 causes the sealing ring 10, made of thermal expansion material, on the outside of the cartridge case 1 to expand rapidly, tightly fitting the inner wall of the nail gun barrel, preventing high-pressure gas leakage, and ensuring that the gas energy is effectively used to push the nail.

[0029] The specific implementation process is as follows:

[0030] In use, the nail cartridge is loaded into the magazine of the nail gun, so that the sealing ring 10 on the outside of the cartridge case 1 contacts the inner wall of the barrel. At this time, the cone block 12 of the firing mechanism is in its initial position under the action of the spring 15, completely inside the firing port 11 and away from the propellant 5. Then, the nail is loaded into the front end of the nail gun barrel, and the trigger is pulled. The firing pin inside the nail gun moves forward and strikes the cone block 12 of the firing mechanism. The cone block 12 slides into the cartridge case 1 under force, impacting the propellant 5 and causing it to ignite, which in turn causes the rupture disc 8 to break. The high-pressure gas propels the nail out, completing the firing operation.

[0031] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A nail gun cartridge with a sealing device, characterized in that: Includes a cartridge case (1), one axial end of the cartridge case (1) is the firing end (2), the other end of the cartridge case (1) away from the firing end (2) is the launching end (9), the firing end (2) is connected to an end cap (3), the end cap (3) is connected to a firing mechanism, the launching end (9) has a launching port (6), the inner wall of the launching port (6) is connected to a rupture disc (8), the cartridge case (1) is filled with propellant (5), the cartridge case (1) is connected to a sealing ring (10), and the sealing ring (10) is provided in several groups.

2. The nail gun cartridge with a sealing device as described in claim 1, characterized in that: The sealing ring (10) is made of a thermally expanding material.

3. A nail gun cartridge with a sealing device as described in claim 1, characterized in that: The rupture disc (8) has a conical groove (7).

4. A nail gun cartridge with a sealing device as described in claim 1, characterized in that: The propellant (5) is nitrocellulose.

5. A nail gun cartridge with a sealing device as described in claim 4, characterized in that: The firing mechanism includes a conical block (12), the end cap (3) has a firing port (11), the conical block (12) is slidably connected to the inner wall of the firing port (11), the inner wall of the firing port (11) has a groove (14), the conical block (12) is connected to a slider (13), the slider (13) is slidably connected to the groove (14), the inner wall of the groove (14) is connected to a spring (15), and the other end of the spring (15) is connected to the slider (13).

6. A nail gun cartridge with a sealing device as described in claim 5, characterized in that: The cartridge case (1) is connected to a moisture-proof membrane (4).

Images