CN219268123U

CN219268123U - Carbon dioxide laser for laser engraving machine and laser power supply thereof

Info

Publication number: CN219268123U
Application number: CN202320772219.8U
Authority: CN
Inventors: 敬洪涛; 敬培源
Original assignee: Zhengzhou Shengnali Electromechanical Equipment Co ltd
Current assignee: Zhengzhou Shengnali Electromechanical Equipment Co ltd
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-06-27
Anticipated expiration: 2033-04-10

Abstract

The utility model discloses a carbon dioxide laser for a laser engraving machine and a laser power supply thereof, which can effectively solve the problem of reduced cooling effect; comprises a discharge tube and a cooling tube; the cooling tube is sleeved on the periphery of the central discharge tube, a water inlet nozzle is arranged at one end close to the cooling tube, and a water outlet nozzle is arranged at the other end close to the cooling tube; an auger is arranged in the cooling tube, the inner edge of each auger blade is tightly attached to the outer tube wall of the discharge tube, and the outer edge of each auger blade is tightly attached to the inner tube wall of the cooling tube. The beneficial effects are that: compared with the prior art, the device has the advantages that the arrangement of the auger blade can be actually seen as dividing the original cooling pipe into a plurality of spaces, compared with the comparison document, the mode of communicating the spaces divided by the auger blade is changed, the mode of communicating is based on the shape and arrangement of the divided spaces, the effect of reducing the amplitude can be met, the smooth flow of circulating water can be ensured, and the cooling effect is not reduced.

Description

Carbon dioxide laser for laser engraving machine and laser power supply thereof

Technical Field

The utility model relates to a carbon dioxide laser for a laser engraving machine and a laser power supply thereof, belonging to the field of laser engraving machine equipment.

Background

The conversion power of the carbon dioxide laser is high, and about five or more of the energy is converted into the thermal energy of the gas, so that the temperature is increased. The increase in gas temperature causes both the deactivation of the upper laser energy level and the thermal activation of the lower laser energy level, which reduces the inversion count of the particles.

Also, an increase in gas temperature will broaden the line, resulting in a decrease in gain factor. In particular, an increase in the gas temperature will also cause decomposition of the carbon dioxide molecules, reducing the concentration of carbon dioxide molecules within the discharge vessel. Since these elements reduce the output power of the laser, a cooling device is provided in the carbon dioxide laser.

In the ' cooling structure of a carbon dioxide laser tube ' of the Chinese patent application No. CN202020636292.9 ', a stabilizing ring is arranged in the cooling tube, through holes and perforations are respectively formed in the stabilizing ring, the stabilizing ring is fixedly connected with a discharge tube through the perforations, the stabilizing ring and the cooling tube are arranged into an integrated structure, four through holes are formed, and the four through holes are distributed in a square shape by taking the center of the stabilizing ring as the center of a circle;

the purpose is that the waterproof space inside the cooling pipe is equally divided into a plurality of parts with equal space through the stabilizing ring, so that the amplitude of circulating water flowing is greatly reduced; however, the cooling effect is reduced due to the fact that the design of the stabilizing ring is equivalent to the arrangement of a barrier in the channel which is originally unobstructed; the apparatus can reduce the amplitude of the circulating water flow, but can sacrifice the partial cooling effect.

Disclosure of Invention

The utility model aims to provide a carbon dioxide laser for a laser engraving machine and a laser power supply thereof, which can effectively solve the problem of reduced cooling effect.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the laser tube comprises a carbon dioxide laser tube, wherein the carbon dioxide laser tube comprises: the cooling tube is sleeved on the periphery of the central discharge tube, a water inlet nozzle is arranged at one end close to the cooling tube, and a water outlet nozzle is arranged at the other end close to the cooling tube;

an auger is arranged in the cooling tube, the inner edge of the auger blade is tightly attached to the outer tube wall of the discharge tube, and the outer edge of the auger blade is tightly attached to the inner tube wall of the cooling tube.

Further: the auger is made of glass or transparent plastic; the cooling pipe, the water inlet nozzle and the water outlet nozzle are made of silicon boride glass, and the inner diameters of the water inlet nozzle and the water outlet nozzle are the same.

Further: spiral water supply channels are formed between adjacent blades of the auger, the inner wall of the cooling pipe and the outer wall of the discharge pipe, and the water inlet nozzle is communicated with the output end of the water outlet nozzle.

Further: the water inlet nozzle is horizontally arranged at a position above the middle of the cooling pipe, and the water outlet nozzle is horizontally arranged at a position below the middle of the cooling pipe.

Further: the cooling device further comprises a gas storage tube, and the gas storage tube is sealed and sleeved on the periphery of the cooling tube.

Further: the discharge tube is characterized in that an anode resonant cavity and a cathode resonant cavity are respectively arranged at two ends of the discharge tube, and an anode electrode and a cathode electrode are respectively arranged in the anode resonant cavity and the cathode resonant cavity.

Further: the carbon dioxide laser is electrically connected with a power supply.

The beneficial effects are as follows:

compared with the prior art, the device has the advantages that the arrangement of the auger blade can be actually seen as dividing the original cooling pipe into a plurality of spaces, compared with the comparison document, the mode of communicating the spaces divided by the auger blade is changed, the mode of communicating is based on the shape and arrangement of the divided spaces, the effect of reducing the amplitude can be met, the smooth flow of circulating water can be ensured, and the cooling effect is not reduced.

Drawings

For ease of illustration, the utility model is described in detail by the following detailed description and the accompanying drawings.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a diagram showing the positional relationship among the water inlet nozzle, the water outlet nozzle and the cooling pipe.

Reference numerals illustrate:

1. a discharge tube; 2. a cooling tube; 3. a water inlet nozzle; 4. a water outlet nozzle; 5. an auger; 6. an anode electrode; 7. a cathode electrode; 8. and a gas storage tube.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

Referring to figures 1 and 2, which illustrate an embodiment of a carbon dioxide laser for a laser engraving machine and a laser power source thereof according to the present utility model,

the device is to the improvement of carbon dioxide laser tube in the carbon dioxide laser, and the carbon dioxide laser tube structure of this device includes: a discharge tube 1 and a cooling tube 2; the cooling tube 2 is sleeved on the periphery of the central discharge tube 1, a water inlet nozzle 3 is arranged at one end close to the cooling tube 2, and a water outlet nozzle 4 is arranged at the other end close to the cooling tube 2; the circulating water enters the cooling pipe 2 from the water inlet nozzle 3 and is output from the water outlet nozzle 4, so that the absorption and transmission of the heat of the laser pipe are completed.

An auger 5 is arranged in the cooling tube 2, the inner edges of blades of the auger 5 are tightly attached to the outer tube wall of the discharge tube 1, and the outer edges of the blades of the auger 5 are tightly attached to the inner tube wall of the cooling tube 2; the spiral water supply channel is formed among the adjacent blades of the auger 5, the inner wall of the cooling pipe 2 and the outer wall of the discharge pipe 1, and when circulating water enters the cooling pipe 2, the circulating water flows along the spiral water supply channel, so that water flow generated by the circulating water flows in a given direction;

compared with the prior art, the arrangement of the blades of the packing auger 5 can be actually seen as dividing the original cooling pipe 2 into a plurality of spaces, and compared with the comparison document, the arrangement of the spaces divided by the blades of the packing auger 5 is changed, and the arrangement of the spaces is based on the shape and arrangement of the divided spaces, so that the effect of reducing the amplitude can be met, the smooth flow of circulating water can be ensured, and the cooling effect is not reduced.

The cooling device also comprises a gas storage tube 8, and the gas storage tube 8 is sealed and sleeved at the periphery of the cooling tube 2; the two ends of the discharge tube 1 are respectively provided with an anode resonant cavity and a cathode resonant cavity, and the anode resonant cavity and the cathode resonant cavity are respectively provided with an anode electrode 6 and a cathode electrode 7.

The anode electrode 6 and the cathode electrode 7 are generally cold cathodes, are cylindrical in shape, and the cathode materials have great influence on the service life of the laser; the silver-tungsten alloy has the cost and effect suitable for commercial use, and the rare oxide electrode such as a cerium-tungsten electrode is the best, but has higher cost.

The gas storage tube 8 has the advantages of increasing the gas storage capacity of the gain medium, reducing the change of the working gas components and the pressure in the discharging process, prolonging the service life, and enhancing the mechanical strength and the stability of the discharge tube 1.

The cooling tube 2 serves to cool the working gas, maintain the output power stable, and prevent the discharge tube from being exploded due to heat during the discharge pumping process.

The device is also provided with an air return pipe which is a thin spiral pipe connected with the space of the two electrodes in the discharge tube 1, so that unbalanced distribution of interelectrode voltage caused by electrophoresis can be improved, and the longer air return pipe also avoids discharge between the air storage pipe 8 and the electrodes, so that discharge is ensured to only occur in the discharge tube 1.

The auger 5 is made of glass and transparent plastic; the cooling pipe 2, the water inlet nozzle 3 and the water outlet nozzle 4 are made of silicon boride glass, and the inner diameters of the water inlet nozzle 3 and the water outlet nozzle 4 are the same.

The packing auger 5 is made of plastic materials for convenient molding, and the cooling pipe 2, the water inlet nozzle 3 and the water outlet nozzle 4 are made of silicon boride glass materials for improving the discharging effect and the heat dissipation effect of the device; the inner diameters of the water inlet nozzle 3 and the water outlet nozzle 4 are the same, so that the water inlet amount and the water outlet amount are conveniently balanced, the stability of water flow is ensured, and the generation of amplitude is reduced.

The water inlet nozzle 3 is horizontally arranged at a position above the middle of the cooling pipe 2, and the water outlet nozzle 4 is horizontally arranged at a position below the middle of the cooling pipe 2; so set up, the rivers that water inlet nozzle 3 got into and the rivers of water outlet nozzle 4 output fit the rivers that spiral water supply channel conveyed very much, furthest's reduction rivers impact force guarantees the stability of device, reduces the production of amplitude.

The carbon dioxide laser is electrically connected with a power supply; the direct current power of the power supply of the device is related to the ratio of carbon dioxide, nitrogen and helium in the laser tube;

in the carbon dioxide laser tube, main working substances consist of three gases of carbon dioxide, nitrogen and helium; wherein carbon dioxide is a gas generating laser radiation, nitrogen and helium are auxiliary gases.

Excitation conditions of carbon dioxide laser tube: the discharge tube 1 is normally supplied with a direct current of several tens of milliamperes or several milliamperes; during discharge, nitrogen molecules in the mixed gas in the discharge tube 1 are excited by the impact of electrons; at this time, the excited nitrogen molecules collide with the carbon dioxide molecules, the N2 molecules transfer their own energy to the carbon dioxide molecules, and the carbon dioxide molecules transition from a low energy level to a high energy level to form a population inversion and emit laser light.

The duty ratio of the carbon dioxide, nitrogen and helium is adjusted, and then the direct current output of the power supply is adjusted, so that the service life of the laser tube can be prolonged.

The above embodiments are merely illustrative embodiments of the present utility model, but the technical features of the present utility model are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the present utility model are included in the scope of the present utility model.

Claims

1. The utility model provides a carbon dioxide laser for laser engraving machine, includes carbon dioxide laser tube, its characterized in that: the carbon dioxide laser tube comprises: the cooling device comprises a discharge tube (1) and a cooling tube (2), wherein the cooling tube (2) is sleeved on the periphery of the discharge tube (1) in the center, a water inlet nozzle (3) is arranged at one end close to the cooling tube (2), and a water outlet nozzle (4) is arranged at the other end close to the cooling tube (2); the cooling tube (2) is internally provided with an auger (5), the inner edges of the blades of the auger (5) are tightly attached to the outer tube wall of the discharge tube (1), and the outer edges of the blades of the auger (5) are tightly attached to the inner tube wall of the cooling tube (2).

2. The carbon dioxide laser for a laser engraving machine according to claim 1, characterized in that: the auger (5) is made of glass or transparent plastic; the cooling pipe (2), the water inlet nozzle (3) and the water outlet nozzle (4) are made of silicon boride glass, and the inner diameters of the water inlet nozzle (3) and the water outlet nozzle (4) are the same.

3. The carbon dioxide laser for a laser engraving machine according to claim 2, characterized in that: screw water supply channels are formed between adjacent blades of the packing auger (5), the inner wall of the cooling pipe (2) and the outer wall of the discharge pipe (1), and the water inlet nozzle (3) is communicated with the output end of the water outlet nozzle (4).

4. The carbon dioxide laser for a laser engraving machine according to claim 3, characterized in that: the water inlet nozzle (3) is horizontally arranged at a position above the middle of the cooling pipe (2), and the water outlet nozzle (4) is horizontally arranged at a position below the middle of the cooling pipe (2).

5. The carbon dioxide laser for a laser engraving machine according to claim 1, characterized in that: the cooling device further comprises a gas storage tube (8), and the gas storage tube (8) is sealed and sleeved on the periphery of the cooling tube (2).

6. The carbon dioxide laser for a laser engraving machine according to claim 5, characterized in that: the discharge tube (1) is characterized in that an anode resonant cavity and a cathode resonant cavity are respectively arranged at two ends of the discharge tube (1), and an anode electrode (6) and a cathode electrode (7) are respectively arranged in the anode resonant cavity and the cathode resonant cavity.

7. A laser power supply for a laser engraving machine is characterized in that: the power supply is electrically connected to the carbon dioxide laser of any of the preceding claims 1-5.