CN111347375B

CN111347375B - Liquid nitrogen nail gun device

Info

Publication number: CN111347375B
Application number: CN202010097690.2A
Authority: CN
Inventors: 王立英; 孙长龙; 胡玉高; 曹荠蓬; 沙健华
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2022-11-01
Anticipated expiration: 2040-02-17
Also published as: CN111347375A

Abstract

The invention relates to a liquid nitrogen nail gun device. Comprises a gun barrel, a gasification chamber, a motor and a handle; the gun barrel is positioned at the uppermost part of the nail gun, and the lower part of the gun barrel is connected with the upper port of the gasification chamber; the upper port of the gasification chamber is of a necking structure; a liquid inlet is arranged on one side of the top of the gasification chamber; the gasification chamber is of a double-layer structure, and a vacuum interlayer is arranged between the inner wall and the outer wall of the gasification chamber; the inside of the gasification chamber is provided with fan blades, the fan blades are connected with a motor through a connecting metal bearing, and the motor is connected with a handle. The gasification chamber is a power generation cavity required by the nail shooting and is used for storing liquid nitrogen and water, and finally the liquid nitrogen is gasified to generate pressure; the fan blades are started to rotate quickly through the motor, liquid nitrogen and water are mixed quickly through the fan blades rotating quickly in the gasification chamber, the gasification rate of the liquid nitrogen is increased sharply when the liquid nitrogen meets water, and the produced high pressure provides power to enable the nails to be ejected quickly. The invention solves the problem of unsafe problem caused by heating in the using process of the traditional nail gun; the device has the characteristics of simple structure, potential safety hazard elimination and environmental protection.

Description

Liquid nitrogen nail gun device

Technical Field

The technical scheme of the invention relates to a liquid nitrogen nail gun device, in particular to a kinetic energy generating device which generates instantaneous high pressure through rapid gasification of liquid nitrogen so as to generate kinetic energy.

Background

Nail guns are tools used to drive nails into wood, walls, etc., and have replaced hammers in many respects as the tool of choice for builders. The existing nail gun can be mainly divided into the following parts according to the power source: pneumatic nail guns, powder-driven nail guns, combustion-powered nail guns, electric nail guns, and electromagnetic-driven nail guns. These nail guns are typically powered by compressed air (pneumatic), electromagnetic actuation, highly flammable gas or gunpowder vaporized within a chamber to eject the nails through a nailed gun pin. The current nail gun has the following problems: first, for electric and combustion powered nail guns, especially combustion powered nail guns, the nails generate a large amount of heat at the same time when being fired, which is very dangerous for construction environments with high dust emission; second, in the conventional gas combustion or powder bullet nail gun, the fuel itself or the gasified fuel generates physical harmful to the environment, which is not environment-friendly. Second, for electric nailers, the electric nailer consumes a large amount of power, and its need for a high power supply also limits its operating range.

Disclosure of Invention

The invention aims to solve the technical problems of the existing nail gun, and provides a novel nail gun scheme and a device which generate power by virtue of liquid nitrogen gasification, and the realization of the nail gun can solve the unsafe problem caused by the heat generation of the traditional nail gun in the using process; the liquid nitrogen is green and clean, so that harmful substances possibly generated after the traditional gas combustion and the gunpowder bullet gasification are avoided; the liquid nitrogen nail shooting device needs small electric quantity for starting, and the problem of large power consumption of the traditional electric nail shooting gun is solved. The device has the characteristics of simple structure, potential safety hazard elimination and environmental protection.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a liquid nitrogen nail gun device comprises a gun barrel, a gasification chamber, a motor and a handle; it is characterized in that the gun barrel is positioned at the uppermost part of the nail gun, and the lower part of the gun barrel is connected with the upper port of the gasification chamber; the upper port of the gasification chamber is of a necking structure; a liquid inlet is arranged at one side of the top of the gasification chamber; the gasification chamber is of a double-layer structure, and a vacuum interlayer is arranged between the inner wall and the outer wall of the gasification chamber; the inside of the gasification chamber is provided with fan blades, the fan blades are connected with a motor through a connecting metal bearing, and the motor is connected with a handle.

A magnet is fixed on one side wall of the upper end of the gun barrel, and the position of the magnet is consistent with the position of a nail in the gun barrel.

The gasification chamber is a power generation cavity required by the shooting nail and is used for storing liquid nitrogen and water, and finally the liquid nitrogen is gasified to generate pressure.

The necking structure of the gasification chamber is that the upper end of the necking is consistent with the gun barrel.

The gasification chamber has a double-layer structure and consists of an outer wall and an inner wall, an interlayer pumped into a vacuum state is arranged between the inner wall and the outer wall, the heat insulation performance of the gasification wall is improved, and meanwhile, an adsorbent is filled in the interlayer.

The outer layer of the outer wall of the gasification chamber is provided with a protective sleeve layer which plays a role in shock absorption.

The top of the gasification chamber is of a necking structure, the upper end of the necking is consistent with the gun barrel, the height of the upper end of the necking and the gun barrel connecting part is 1/6-1/5 of the upper-lower overall height of the gasification chamber, and the lower end of the necking is consistent with the upper end of the gasification chamber.

One side of the top of the gasification chamber is provided with a liquid inlet, the height of the liquid inlet is 1/5-1/4 of the overall height of the gasification chamber, the liquid inlet is deep into the gasification chamber, an adsorbent is arranged around the contact part of the liquid inlet and the outer wall of the gasification chamber, and a gap is designed at the top of the liquid inlet, so that nitrogen evaporated in the gasification chamber is discharged, the safety is ensured, the heat insulation performance is required, and the evaporation of liquid nitrogen is reduced.

The motor is arranged below the gasification chamber, the upper part of the motor is connected with the fan blades through connecting metal bearings, the fan blades stretch into the gasification chamber, the motor shell is wrapped outside the motor, and a motor switch is arranged on one side of the shell and used for switching on the trigger switch.

The motor is connected with the handle, the handle is composed of a handle, a clamping groove and a sliding groove rail, and the motor shell is connected with the handle through the clamping groove and the sliding groove rail arranged at the bottom of the handle, so that the motor is convenient to hold and operate.

The working principle of the device of the invention is as follows: the design is passed through motor start flabellum fast revolution, through the fan blade of fast revolution in the vaporizer, with liquid nitrogen and water flash mixed, the liquid nitrogen meets water gasification rate and sharply improves, and the high pressure of production provides power and enables that the nail jets out fast. Based on the principle, the design is a mode of quickly mixing liquid nitrogen and water through quick stirring, so that the liquid nitrogen is quickly vaporized, and the nail is sprayed out from the nozzle at a high speed by the generated strong pressure, thereby achieving the purpose of puncturing objects.

The beneficial effects of the invention are as follows: the problem of insecurity caused by heating of the traditional nail gun in the using process is solved; the liquid nitrogen is green and clean, so that harmful substances possibly generated after the traditional gas combustion and the gasification of the gunpowder bullet are avoided; the liquid nitrogen nail shooting device needs small electric quantity for starting, and the problem of large power consumption of the traditional electric nail shooting gun is solved. The device has the characteristics of simple structure, potential safety hazard elimination and environmental protection.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is an overall external view of a liquid nitrogen nail gun.

Fig. 2 is a schematic structural view of a liquid nitrogen nail gun device.

Fig. 3 is a partial enlarged view of the wall structure of the gasification chamber of the liquid nitrogen nail gun.

Fig. 4 is a schematic view of the handle structure.

Fig. 5 is an enlarged partial view of the handle bottom spring snap track configuration.

Description of the reference numerals:

1. a barrel; 2. a gasification chamber; 3. a gasification chamber wall; 4. a motor, 5, a motor switch; 6. fan blades, 7, a handle, 8 and a liquid inlet; 9. a magnet; 10. metal bearing, 11, shaft sleeve, 12 and shooting nail.

701. A handle; 702. a card slot; 703. a chute track.

7031. A piston; 7032. a spring.

301. A gasification chamber protective sleeve; 302. an outer wall of the gasification chamber; 303. a gasification chamber wall interlayer; 304. the inner wall of the gasification chamber.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, it should be noted that the following terms "upper", "lower", "left", "right", "front", "back", "inner", "outer", "top" and "bottom" and the like for indicating the orientation or position are only based on the orientation or position shown in the drawings, and are only simplified descriptions with respect to the position of the drawings of the present invention, and do not require that the described devices or components be constructed according to the described position or orientation, so the description of the position should not be construed as limiting the present invention.

Example 1

Referring to fig. 1, 2, 3, 4 and 5, in an embodiment 1 of the present invention, a liquid nitrogen nail gun is provided, wherein a gun body itself includes a gun barrel 1, a gasification chamber 2, a gasification chamber wall 3, a motor 4, a motor switch 5, a fan blade 6, a handle 7, a liquid inlet 8, a magnet 9, a metal bearing 10, a shaft sleeve 11 and a nail 12. Barrel 1 is located 2 tops of vaporizer, and 1 lower extreme of barrel is connected with 2 ports on the vaporizer through axle sleeve 11, and the outside of barrel 1 has the inclined plane structure, and 11 one end of axle sleeve is equipped with 1 inclined plane assorted stepped draw-in groove of barrel, and the other end has internal thread structure, is connected with the external screw thread of vaporizer upper port through this internal thread mechanism, whole barrel simple structure, the dismouting of being convenient for. The shooting nail 12 is arranged in the gun barrel and is adsorbed by the magnet 9 arranged on one side of the gun barrel so as to prevent the shooting nail from moving in position in the gun barrel. The gasification chamber is a power generation cavity required by the shooting nail and is used for storing liquid nitrogen and water, and finally the liquid nitrogen is gasified to generate pressure. The top of the gasification chamber is of a necking structure, the upper end of the necking is connected with the gun barrel, and the height of the upper end and the lower end of the necking is 1/6 of the overall height of the gasification chamber. The gasification chamber wall 3 comprises a gasification chamber outer sleeve 301, a gasification chamber outer wall 302, a gasification chamber inner wall 303 and a gasification chamber wall interlayer 304, adsorbent alumina is filled in the gasification chamber interlayer, and the gasification chamber outer sleeve 301 uses a silica gel layer. A liquid inlet 8 is formed in one side of the top of the gasification chamber, and the height of the liquid inlet is 1/5 of the overall height of the gasification chamber; the lower part of the gasification chamber 2 is provided with a motor 5, and the two are tightly sleeved and buckled together. The bottom in the gasification chamber 2 is provided with a fan blade 6, and the fan blade 6 is connected with the motor 4 through a metal bearing 10. The bottom of the handle 7 is provided with a handle 701, a clamping groove 702 and a sliding groove track 703; a piston 7031 and a spring 7032 are arranged in the sliding chute track 703; the handle 7 is fixedly connected with the bottom of the motor 4 through a clamping groove 702 and a chute track 703.

The vaporizer chamber wall 3 comprises a vaporizer protective jacket 301, a vaporizer outer wall 302, a vaporizer inner wall 303, and a vaporizer chamber wall interlayer 304. The vaporizer protecting jacket 301 is a layer outside the vaporizer outer wall 302, the vaporizer inner wall 303 is a vaporizer inner layer, the vaporizer inner wall interlayer 303 is a gap between the vaporizer outer wall 302 and the vaporizer inner wall 304, the vaporizer bottleneck 4 connects the vaporizer outer wall 302 and the vaporizer inner wall 304, the liquid inlet 8 is located on one side above the vaporizer 2, and the magnet 9 is installed on one side of the bottom of the gun barrel 1.

According to the device, the operation method for shooting the nail comprises the following steps: the shooting nail is arranged in the gun barrel 1 and is adsorbed at the position of the magnet 9, and the gun barrel 1 is connected with the upper port of the gasification chamber through a shaft sleeve 11; the bottom of the gasification chamber 2 is provided with external threads, the upper end of the shell of the motor 4 is provided with internal threads matched with the external threads, and the gasification chamber 2 is connected with the motor 4 through a threaded structure; pulling the two sides of the handle 7, and placing the bottom end of the motor 4 connected with the gasification chamber 2 in the chute track 703 through the clamping groove 702 by compressing the spring 7032 by the piston 7031 arranged in the chute track 703, so as to lock the bottom end of the motor 4 and complete the connection of the shell of the motor 4 and the handle 7; injecting liquid nitrogen and water into the gasification chamber through the liquid inlet 8 in sequence, and closing the liquid inlet 8; during operation, the handle 701 is held to touch the motor switch 5 to start the motor, the motor 4 drives the fan blade 6 in the gasification chamber to rotate rapidly, liquid nitrogen and water are mixed rapidly through the fan blade rotating rapidly in the gasification chamber, the gasification rate of the liquid nitrogen is increased rapidly when the liquid nitrogen meets the water, and the generated high pressure pushes the shooting nail to be shot out rapidly.

The existing nail guns in the market are mainly designed by spring-loaded nail guns, electromagnetic nail guns, pneumatic nail guns and detonation-type nail guns. For the spring-loaded nail gun, a motor is adopted to pull the nail gun, and a hammering device is driven to shoot nails by compressing a mechanical spring; for the electromagnetic nail gun, a solenoid is used as a hammering device, a sliding piston is arranged in the solenoid and made of magnetic materials, when trigger current is pulled to pass through the solenoid, a generated electromagnetic field and the magnetic piston repel each other and push out the piston, and a nail is quickly touched to be sent out; for a pneumatic nail gun, the hammering force is from compressed air, the nail gun is connected with an air compressor, the compressed air is continuously input into an air storage chamber of the nail gun through a hose, and a piston is pushed by the compressed air in the air storage chamber to drive a nail to be quickly ejected; the drive structure of the explosion type nail gun is similar to that of a pneumatic nail gun, but the difference lies in that the source of the air pressure difference is different, the explosion type nail gun is provided with an air storage chamber filled with combustible gas, an electronic control device enables a spark plug in a combustion chamber to emit an electric spark to ignite the gas to cause a small explosion, the pressure of the explosion pushes a piston, and finally the nail is ejected under the pushing of the piston. The liquid nitrogen nail gun provided by the invention has the advantages that the mechanical spiral fan blades are driven to rotate by the motor, liquid nitrogen and water in the gasification chamber are quickly mixed, the nail gun is pushed to eject by virtue of air pressure generated by gasification of the liquid nitrogen, and the liquid nitrogen nail gun is simple in design device and easy to operate. The design of the whole device adopts clean and pollution-free liquid nitrogen as power energy, and the liquid nitrogen is green and clean, so that harmful substances possibly generated after the traditional gas combustion and the gunpowder bullet gasification are avoided; the other nail gun has the unsafe problem caused by heat generation in the working engineering, and the liquid nitrogen (77K) used by the invention has no problem of heat generation; finally, the motor used for starting the liquid nitrogen nail-shooting device only needs small electric quantity, and the problem of large power consumption of the traditional electric nail-shooting gun is solved.

Claims

1. A liquid nitrogen nail gun device comprises a gun barrel, a gasification chamber, a motor and a handle; it is characterized in that the gun barrel is positioned at the uppermost part of the nail gun, and the lower part of the gun barrel is connected with the upper port of the gasification chamber; the upper port of the gasification chamber is of a necking structure; a liquid inlet is arranged on one side of the top of the gasification chamber; the gasification chamber is of a double-layer structure, and a vacuum interlayer is arranged between the inner wall and the outer wall of the gasification chamber; the inside of the gasification chamber is provided with fan blades which are connected with a motor through a connecting metal bearing, and the motor is connected with a handle; a magnet is fixed on one side wall of the upper end of the gun barrel, and the position of the magnet is consistent with the position of a nail in the gun barrel; the gasification chamber is a power generation cavity required by the shooting nail and is used for storing liquid nitrogen and water, and finally the liquid nitrogen is gasified to generate pressure.

2. A liquid nitrogen nail gun apparatus as claimed in claim 1, wherein the vaporizing chamber has a throat structure in which an upper end of the throat coincides with the barrel and a lower end of the throat coincides with an upper end of the vaporizing chamber.

3. The liquid nitrogen nail gun device according to claim 1, wherein said vaporizing chamber has a double-layered structure consisting of an outer wall and an inner wall, and an interlayer evacuated to a vacuum state is provided between the inner wall and the outer wall to enhance the heat insulating property of the vaporizing wall, and an adsorbent is filled in the interlayer.

4. A liquid nitrogen nail gun device as claimed in claim 1, wherein the outer layer of the outer wall of the gasification chamber is provided with a protective sheath layer for shock absorption.

5. A liquid nitrogen nail gun device as claimed in claim 1, wherein the top of the vaporizing chamber is of a necking structure, the upper end of the necking is in line with the gun barrel, and the height of the upper end of the necking is 1/6-1/5 of the height of the upper and lower whole portions of the vaporizing chamber.

6. The liquid nitrogen nail gun device as claimed in claim 1, wherein a liquid inlet is provided at one side of the top of the gasification chamber, the height of the liquid inlet is 1/5-1/4 of the overall height of the gasification chamber, the liquid inlet extends into the gasification chamber, an adsorbent is provided around the contact part of the liquid inlet and the inner and outer walls of the gasification chamber, and a gap is provided at the top of the liquid inlet to discharge nitrogen evaporated from the gasification chamber, thereby ensuring safety, having thermal insulation performance and reducing liquid nitrogen evaporation.

7. The liquid nitrogen nail gun device as claimed in claim 1, wherein a motor is provided under the gasification chamber, a motor is provided over the motor and connected to a fan blade via a metal bearing, the fan blade extends into the gasification chamber, the motor is externally wrapped by a motor housing, and a motor switch is provided on one side of the housing for connecting a trigger switch.

8. The liquid nitrogen nail gun device as claimed in claim 1, wherein the motor is connected with the handle, the handle is composed of a handle, a slot and a chute rail, and the outside of the motor shell is connected with the handle through the slot and the chute rail arranged at the bottom of the handle, so as to facilitate the hand-held operation.