CN215880403U

CN215880403U - Protective lens cone for laser emergent head

Info

Publication number: CN215880403U
Application number: CN202122076341.5U
Authority: CN
Inventors: 葛大梁; 林宇新; 龙集贤
Original assignee: Shenzhen Baroy New Material Technology Co ltd
Current assignee: Shenzhen Baroy New Material Technology Co ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-02-22
Anticipated expiration: 2031-08-30

Abstract

The utility model relates to a protective lens cone of a laser emergent head, which is provided with two channels of water cooling and air sealing. Wherein the water-cooling channel: the cooling water enters the conduit in the water-passing layer through the water inlet nozzle and the water inlet hole and then flows out of the water outlet hole and the water outlet nozzle. Air sealing the channel: the cooling gas sequentially passes through the air inlet nozzle, the air inlet hole and the ventilation layer, flows into the protection cylinder through the ventilation hole and is discharged through the air outlet. A large amount of heat can be taken away at the in-process that flows out to gas, and the gas of simultaneously spouting through the vent can form a vacuum area of no powder on gas outlet and melt surface, greatly reduced the reflection of dust to the laser, improved the utilization efficiency of laser and prolonged life. Meanwhile, the window glass is arranged in the protective cylinder, so that the equipment can be ensured to be in a vacuum sealing state, laser can penetrate through the window glass, the laser emitting head can be protected, the cost is low, and the window glass is convenient to replace.

Description

Protective lens cone for laser emergent head

Technical Field

The utility model relates to the technical field of laser processing, in particular to a protective lens cone of a laser emergent head.

Background

The laser processing technology is a technology for cutting, welding, surface processing, perforating, micromachining materials (including metals and non-metals) by utilizing the interaction characteristic of a laser beam and substances, and is used as a light source to identify objects, and the laser processing technology is the most widely applied traditional technology. Most of the current environments for applying the laser emitting head are normal pressure and normal temperature, such as the laser heating method mentioned in the application No. 201810923598.X nano material preparation equipment and method, in which the laser light source mainly acts to further heat the material by laser after the material is heated and melted, so as to gasify the melt. In this case, due to the limitation of the focusing length of the laser, the laser emitting head must be installed at a suitable height above the melt in order to focus the focal point of the laser on the melt. In the nanometer powder preparation process, equipment is in under the negative pressure condition, simultaneously because can produce nanometer powder in the preparation in-process equipment, these powders can be attached to first casing of outgoing and lens, can cause the laser outgoing to be sheltered from, simultaneously because being full of the nanometer powder of certain concentration in the equipment, after concentration reaches certain level, the nanometer powder of suspension in the air can absorb the laser energy of most follow outgoing head and jet out, causes the laser energy who reaches the melt surface to reduce by a wide margin. Since the temperature of the melt can reach over 1000 ℃, for the ejection head with short focus, the installation position is close to the melt, and a large amount of heat radiation can be absorbed, so that the ejection head is damaged. During the preparation process, the liquid level gradually descends along with the gradual gasification of the molten liquid, and the position of the laser emitting head also needs to be adjusted. At present, the laser emitting head cannot meet the use working condition, and in order to solve the problem, the laser emitting head protective lens barrel can meet the requirement under the condition that the existing laser emitting head is not changed.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a laser emitting head protection barrel that protects a laser emitting head.

In order to solve the technical problems, the utility model adopts the technical scheme that: a laser exit head protection barrel comprising: the barrel comprises a central hole, a water-permeable layer and a ventilation layer from inside to outside, and the central hole is vertically communicated with the ventilation layer; the protective cylinder flange is connected to the upper end of the cylinder body, a plurality of water inlet holes and water outlet holes which are communicated with the water passing layer and air inlet holes which are communicated with the air passing layer are formed in the protective cylinder flange, the water inlet holes are connected with water inlet nozzles, the water outlet holes are connected with water outlet nozzles, the air inlet holes are connected with air inlet nozzles, guide pipes are arranged in the water passing layer, one ends of the guide pipes are connected with the water inlet holes, the other ends of the guide pipes are connected with the water outlet holes, and cooling water flows through the guide pipes; the barrel bottom flange is connected with the lower end of the barrel body and provided with a plurality of vent holes communicated with the vent layer, a mounting groove is formed in the barrel bottom flange, window glass is arranged in the mounting groove, and the window glass seals the lower end of the central hole; the upper end of the protective cylinder is connected with the cylinder bottom flange and communicated with the ventilation layer through the vent hole, the lower end of the protective cylinder forms an air outlet, and the lower part of the protective cylinder is a conical part with the inner diameter gradually reduced from top to bottom; the cooling gas sequentially passes through the air inlet nozzle, the air inlet hole and the ventilation layer, flows into the protection cylinder through the vent hole and is discharged through the air outlet.

Furthermore, a pressing device is further arranged in the mounting groove and connected with the cylinder bottom flange in a threaded mode to tightly press the window glass in the mounting groove in a sealing mode.

Furthermore, an annular groove is arranged in the mounting groove, and a sealing gasket is arranged in the annular groove.

Furthermore, the compressing device is annular, and the inner diameter of the compressing device is larger than that of the central hole.

Furthermore, the window glass is quartz glass with high light transmission and high temperature resistance.

Furthermore, the window glass is plated with a laser antireflection film.

Further, the annular array of ventilation holes is provided with a plurality of ventilation holes.

The utility model has the beneficial effects that: two channels of water cooling and air sealing are arranged. Wherein the water-cooling channel: the cooling water enters the conduit in the water-passing layer through the water inlet nozzle and the water inlet hole and then flows out of the water outlet hole and the water outlet nozzle. The water-cooling channel can effectively reduce the working temperature of the ejection head. Air sealing the channel: the cooling gas sequentially passes through the air inlet nozzle, the air inlet hole and the ventilation layer, flows into the protection cylinder through the ventilation hole and is discharged through the air outlet. A large amount of heat can be taken away at the in-process that flows out to gas, and the gas of simultaneously spouting through the vent can form a vacuum area that does not have the powder on gas outlet and melt surface, and the powder in the furnace body can not be touched to laser when passing through this region, has improved the energy utilization of laser greatly. Through the water cooling and air sealing effects, the working temperature of the ejection head can be protected to be in a normal environment, a dust-free channel can be formed for a laser passage, the utilization efficiency of laser is greatly improved, and the service life is prolonged. Meanwhile, the window glass is arranged in the protective cylinder, the laser head can be protected by the window glass, the whole equipment is in a vacuum sealing state, the emergent head is positioned outside the closed vacuum equipment, and the window glass is low in cost and convenient to replace.

Drawings

Fig. 1 is a schematic structural view of a protective lens barrel of a laser exit head according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a protection barrel flange of a laser exit head protection barrel according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a barrel bottom flange of a laser exit head protection barrel according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a barrel bottom flange of a laser exit head protection barrel according to another direction in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a protection barrel of a laser exit head protection barrel according to an embodiment of the present invention.

Description of reference numerals:

100. a barrel; 110. a central bore; 120. introducing a water layer; 121. a conduit; 130. a ventilation layer;

200. a protective barrel flange; 210. a water inlet nozzle; 220. a water outlet nozzle; 230. an air inlet nozzle;

300. a cylinder bottom flange; 310. a vent hole; 320. mounting grooves; 321. a window glass;

322. a pressing device; 330. a ring groove; 331. a sealing gasket; 400. a protective cylinder; 410. and an air outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, a laser exit head protection lens barrel according to the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1 to 5, a lens barrel for protecting a laser emitting head includes: the cylinder body 100 comprises a central hole 110, a water passing layer 120 and a ventilation layer 130 from inside to outside, wherein the central hole 110 and the ventilation layer 130 are vertically communicated; the protection cylinder flange 200 is connected to the upper end of the cylinder body 100, the protection cylinder flange 200 is provided with a plurality of water inlet holes and water outlet holes communicated with the water passing layer 120 and air inlet holes communicated with the air passing layer 130, the water inlet holes are connected with water inlet nozzles 210, the water outlet holes are connected with water outlet nozzles 220, the air inlet holes are connected with air inlet nozzles 230, a guide pipe 121 is arranged in the water passing layer 120, one end of the guide pipe 121 is connected with the water inlet holes, the other end of the guide pipe is connected with the water outlet holes, and cooling water flows through the guide pipe 121; the cylinder bottom flange 300 is connected with the lower end of the cylinder body 100, the cylinder bottom flange 300 is provided with a plurality of vent holes 310 communicated with the vent layer 130, a mounting groove 320 is arranged in the cylinder bottom flange 300, window glass 321 is arranged in the mounting groove 320, and the window glass 321 seals the lower end of the central hole 110; the protection cylinder 400 is vertically communicated, the upper end of the protection cylinder 400 is connected with the cylinder bottom flange 300 and is communicated with the ventilation layer 130 through the ventilation hole 310, the lower end of the protection cylinder 400 forms an air outlet, and the lower part of the protection cylinder 400 is a conical part with the inner diameter gradually reduced from top to bottom; the cooling gas passes through the air inlet nozzle 230, the air inlet hole, and the ventilation layer 130 in sequence, flows into the protection cylinder 400 through the ventilation hole 310, and is discharged through the air outlet.

Two channels of water cooling and air sealing are arranged. Wherein the water-cooling channel: the cooling water enters the conduit 121 in the water passing layer 120 through the water inlet nozzle 210 and the water inlet hole, and then flows out from the water outlet hole and the water outlet nozzle 220. The water-cooling channel can effectively reduce the working temperature of the ejection head. Air sealing the channel: the cooling gas passes through the inlet nozzle 230, the inlet hole, and the ventilation layer 130 in sequence, flows into the protective cylinder 400 through the ventilation hole 310, and is discharged through the outlet. A large amount of heat can be taken away at the in-process that flows out to gas, and the gas that jets out through gas vent 310 simultaneously can form a vacuum area that does not have the powder on gas outlet and melt surface, and the powder in the furnace body can not touch when laser passes through this region, has improved the energy utilization of laser greatly. Through the water cooling and air sealing effects, the working temperature of the ejection head can be protected to be in a normal environment, a dust-free channel can be formed for a laser passage, the utilization efficiency of laser is greatly improved, and the service life is prolonged. Meanwhile, the window glass 321 is arranged in the protective cylinder 400, the window glass 321 can protect the laser head, the whole device is in a vacuum sealing state, the emergent head is arranged outside the sealed vacuum device, and the laser head is low in cost and convenient to replace. The combination of water cooling and air cooling can ensure that the obtained emitter can be used in severe environments with high temperature, negative pressure and large dust amount under the condition of not changing the existing design; when the laser type is changed, only the laser emitting head protective lens barrel is needed to be changed, excessive adjustment on the emitting head is not needed, and the cost is reduced.

Referring to fig. 3, a pressing device 322 is further disposed in the mounting groove 320, and the pressing device 322 is connected to the barrel bottom flange 300 in a threaded manner to tightly seal and press the window glass 321 in the mounting groove 320. The pressing device 322 is arranged, so that the sealing performance can be improved, and the window glass 321 can be conveniently maintained and replaced.

Referring to fig. 1, a ring groove 330 is disposed in the mounting groove 320, and a sealing gasket 331 is disposed in the ring groove 330. The gasket 331 is configured to improve sealing performance. In particular. The window glass 321 presses the sealing washer 331 against the pressing device 322.

Referring to fig. 3, the pressing device 322 is ring-shaped, and its inner diameter is larger than the spot diameter of the laser on the window glass 321, or directly larger than the inner diameter of the central hole 110. Avoiding blocking laser emission.

Preferably, the window glass 321 is quartz glass with high light transmittance and high temperature resistance.

Preferably, the window glass 321 is coated with a laser antireflection film. Namely, the transmittance of the laser is increased through physical or chemical coating, and the specific coating material can be selected according to the wave band of the laser.

Preferably, the circular array of the vent holes 310 is provided in plurality.

Preferably, the water-cooling circulation device is further included, and the water outlet end of the water-cooling circulation device is connected with the water inlet nozzle 210, and the water inlet end of the water-cooling circulation device is connected with the water outlet nozzle 220.

Preferably, an annular guide pipe is arranged at the bottom of the water passing layer 120, the annular guide pipe is connected with the water inlet hole through a vertical water inlet guide pipe and is connected with the water outlet hole through a vertical water outlet guide pipe, that is, the cooling water sequentially passes through the water outlet end of the water-cooling circulation device, the water inlet nozzle 210, the water inlet hole, the vertical water inlet guide pipe, the annular guide pipe, the vertical water outlet guide pipe, the water outlet hole, the water outlet nozzle 220 and the water inlet end of the water-cooling circulation device.

Particularly, the laser protection device further comprises a distance measuring sensor fixed outside the protection cylinder 400, the distance between the protection cylinder 400 and the surface of the molten liquid is measured through the distance measuring sensor, so that the protection cylinder 400 is protected, and the height of the laser emitting head can be conveniently adjusted. Simply, also can fix range sensor on the laser outgoing head, protection section of thick bamboo 400 is fixed motionless, and the laser outgoing head connects linear movement mechanism, conveniently adjusts its focus.

Specifically, the height of the peripheral wall of the mounting groove 320 is lower than or equal to the height of the upper edge of the tapered portion. The air outlet can be concentrated to the flow direction of the air current promptly, and the air current disorder in the protective cylinder 400 is avoided, influences the laser effect.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In summary, the lens barrel for protecting the laser emitting head provided by the utility model can ensure that the working environment of the emitting head becomes safe and reliable, and the damage to the emitting head in a vacuum environment and under a high temperature condition is avoided; the three-layer structure of the barrel can well ensure the working temperature of the emergent head, and can form a dust-free zone through the air outlet, thereby avoiding the shielding of powder on a window, simultaneously avoiding the laser from irradiating the powder suspended in the equipment space in the emitting process, and greatly improving the utilization rate of the laser; in the traditional structure, because the molten liquid is gradually gasified, the liquid level is gradually reduced, the position of the ejection head is required to be adjusted, the focus of laser is ensured to be on the surface of the molten liquid, and the service life of the mechanism is greatly shortened no matter which sealing structure is adopted under the vacuum multi-dust equipment environment.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A laser exit head protection barrel, comprising:

the barrel comprises a central hole, a water-permeable layer and a ventilation layer from inside to outside, and the central hole is vertically communicated with the ventilation layer;

the protective cylinder flange is connected to the upper end of the cylinder body, a plurality of water inlet holes and water outlet holes which are communicated with the water passing layer and air inlet holes which are communicated with the air passing layer are formed in the protective cylinder flange, the water inlet holes are connected with water inlet nozzles, the water outlet holes are connected with water outlet nozzles, the air inlet holes are connected with air inlet nozzles, guide pipes are arranged in the water passing layer, one ends of the guide pipes are connected with the water inlet holes, the other ends of the guide pipes are connected with the water outlet holes, and cooling water flows through the guide pipes;

the barrel bottom flange is connected with the lower end of the barrel body and provided with a plurality of vent holes communicated with the vent layer, a mounting groove is formed in the barrel bottom flange, window glass is arranged in the mounting groove, and the window glass seals the lower end of the central hole;

the upper end of the protective cylinder is connected with the cylinder bottom flange and communicated with the ventilation layer through the vent hole, the lower end of the protective cylinder forms an air outlet, and the lower part of the protective cylinder is a conical part with the inner diameter gradually reduced from top to bottom;

the cooling gas sequentially passes through the air inlet nozzle, the air inlet hole and the ventilation layer, flows into the protection cylinder through the vent hole and is discharged through the air outlet.

2. The lens barrel for protecting a laser emitting head according to claim 1, wherein a pressing device is further disposed in the mounting groove, and the pressing device is connected with the barrel bottom flange in a threaded manner to tightly press the window glass in the mounting groove in a sealing manner.

3. The laser exit head protective lens barrel according to claim 2, wherein an annular groove is provided in the mounting groove, and a sealing gasket is provided in the annular groove.

4. The laser exit head protection barrel according to claim 3, wherein the pressing means is ring-shaped, and an inner diameter thereof is larger than an inner diameter of the central hole.

5. The laser exit head protective barrel according to claim 1, wherein the window glass is a high-light-transmission, high-temperature-resistant quartz glass.

6. The protective lens barrel for a laser emitting head according to claim 1, wherein the window glass is coated with a laser antireflection film.

7. The laser exit head protection barrel according to claim 1, wherein the annular array of vent holes is provided in plurality.