Laser end air curtain protection mechanism

Abstract

The invention discloses a laser end air curtain protection mechanism, which is used for protecting a rotary reflecting mirror of a laser cleaner, and comprises a first annular part, a second annular part and a third annular part, the second annular part is arranged on the outer side of the first annular part in a sleeving mode, and a first exhaust gap and an inner air curtain cavity are reserved between the first annular part and the second annular part; and the third annular part is arranged on the outer side of the second annular part in a sleeving manner. According to the laser cleaning device, the first exhaust gap and the inner air curtain cavity are formed by the first annular part and the second annular part which are arranged around the rotary reflecting mirror, and the air flow is conveyed to the inner air curtain cavity through the at least two sets of fans, so that an air curtain is formed in the front section of the rotary reflecting mirror, and smoke close to the rotary reflecting mirror is dispersed in the laser cleaning process; and the problem that the lens is burnt due to the fact that smoke is attached to the lens is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cleaning equipment, and in particular to a laser head air curtain protection mechanism. Background Art

[0002] The statements herein only provide background art related to the present invention and do not necessarily constitute prior art.

[0003] After the gun barrel is used, residues will adhere to its inner wall. These residues will reduce the smoothness of the inner wall and increase the frictional resistance. Therefore, corresponding equipment is needed to clean its inner wall, and the inner wall of the gun barrel can be effectively decontaminated by laser cleaning.

[0004] Existing laser cleaning equipment usually uses a single beam to clean the inner wall of the gun barrel. In operations such as laser cleaning and cutting, the protective mirror is a key component of the laser head and needs to avoid the attachment of pollutants such as dust and slag. Traditional protection schemes mostly use an air compressor to externally connect an air pipe to continuously supply air to the laser head, and form an air curtain through the air flow to isolate pollutants. This method has the following deficiencies: it relies on an external air source; an air compressor and an air pipe need to be equipped, and it is difficult to carry and deploy the air source during field operations, especially it cannot be used in an environment without stable power supply. Therefore, a laser head air curtain protection mechanism is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a laser head air curtain protection mechanism aiming at the above deficiencies at present.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions: A laser head air curtain protection mechanism for protecting the rotating mirror of a laser cleaner, comprising:

[0007] A first annular part, which is arranged in a ring around the rotating mirror;

[0008] A second annular part, which is sleeved outside the first annular part, and a first exhaust gap and an inner air curtain cavity are left between the first annular part and the second annular part;

[0009] A third annular part, which is sleeved outside the second annular part, and a second exhaust gap and an outer air curtain cavity are left between the third annular part and the second annular part;

[0010] It further includes multiple groups of blowers arranged on the laser cleaner. The output ends of at least two groups of the blowers are communicated with the inner air curtain cavity to block dust and protect the rotating mirror, and the output ends of the remaining blowers are communicated with the outer air curtain cavity to blow away the soot generated during the laser working process.

[0011] Further, an acceleration curve is provided on the upper side of the first annular portion, and the acceleration curve is a curve of a Laval air flow structure.

[0012] Further, the second annular portion includes a movable ring that can move axially, and an adjusting ring disposed outside the movable ring and threadedly connected thereto. A conical flow guide ring is disposed inside the movable ring;

[0013] The adjusting ring is used to adjust the axial movement of the movable ring, control the distance between the conical flow guide ring and the first exhaust gap, so as to control the angle of gas discharge in the first exhaust gap.

[0014] Further, diffusion air guide vanes are provided in the second exhaust gap;

[0015] A rotating ring is provided in the outer air curtain cavity. The diffusion air guide vanes are disposed on the rotating ring, and the diffusion air guide vanes are used to guide the air flow discharged from the second exhaust gap to discharge obliquely along the diffusion air guide vanes.

[0016] Further, a driving unit is further provided on the laser cleaner. The output end of the driving unit is provided with a transmission wheel extending into the outer air curtain cavity, and the transmission wheel is in transmission connection with the rotating ring to drive the rotating ring and the diffusion air guide vanes disposed thereon to rotate.

[0017] Further, the rotating ring is used to block the second exhaust gap, and the air in the outer air curtain cavity is discharged through the diffusion air guide vanes.

[0018] Further, a hollow motor for driving the rotating mirror to rotate is provided inside the laser cleaner;

[0019] The hollow motor has the same rotational speed as the driving unit, and is used to blow the dust on the working path of the rotating mirror by the air discharged from the outer air curtain cavity guided by the diffusion air guide vanes.

[0020] Further, the number of the blowers is three groups. The three groups of blowers are equidistantly distributed on the laser cleaner. The output ends of two groups of blowers are communicated with the inner air curtain cavity, and the output end of one group of blowers is communicated with the outer air curtain cavity.

[0021] Further, a filter screen is provided at the input end of the blower.

[0022] The beneficial effects of the present invention are embodied in:

[0023] In the present invention, a first exhaust gap formed by a first annular part and a second annular part arranged around a rotating mirror and an inner air curtain cavity are provided, and at least two groups of the blowers are used to convey air flow to the inner air curtain cavity, so as to form an air curtain in front of the rotating mirror, and during the laser cleaning process, the soot near the rotating mirror is dispersed to avoid the problem that the soot adheres to the lens and causes the lens to burn out. Description of the Drawings

[0024] Figure 1 is a three-dimensional sectional view of the present invention;

[0025] Figure 2 is a three-dimensional structure diagram of the present invention;

[0026] Figure 3 is a structural schematic diagram of the present invention;

[0027] Figure 4 is of the present invention Figure 3 magnified schematic diagram at A in;

[0028] Figure 5 is a structural schematic diagram of the first exhaust gap of the present invention.

[0029] In the figure:

[0030] 1. Laser cleaner;

[0031] 2. Rotating mirror;

[0032] 3. Hollow motor;

[0033] 4. First annular part;

[0034] 5. Second annular part; 51. Movable ring; 52. Adjusting ring; 53. Conical diversion ring;

[0035] 6. Third annular part;

[0036] 7. Blower;

[0037] 8. Inner air curtain cavity;

[0038] 9. Outer air curtain cavity;

[0039] 10. Diffusion air guide piece;

[0040] 11. Driving unit;

[0041] 12. Transmission wheel;

[0042] 13. Rotating ring. Detailed Embodiments

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] Please refer to Figures 1-5 , the present invention discloses a laser end air curtain protection mechanism for protecting the rotating mirror 2 of the laser cleaner 1. The specific principle is that the laser cleaner 1 emits laser light, which acts on the inner wall of the circular tube after being refracted by the rotating mirror 2 for laser cleaning. Specifically, it includes:

[0045] The first annular part 4, the first annular part 4 is arranged in a ring around the rotating mirror 2;

[0046] The second annular part 5, the second annular part 5 is sleeved outside the first annular part 4, and a first exhaust gap and an inner air curtain cavity 8 are left between the first annular part 4 and the second annular part 5;

[0047] The third annular part 6, the third annular part 6 is sleeved outside the second annular part 5, and a second exhaust gap and an outer air curtain cavity 9 are left between the third annular part 6 and the second annular part 5. In the above, the first annular part 4, the second annular part 5 and the third annular part 6 are coaxially arranged and are stacked in sequence from inside to outside;

[0048] It further includes a plurality of groups of blowers 7 arranged on the laser cleaner 1. The output ends of at least two groups of the blowers 7 are communicated with the inner air curtain cavity 8 to block dust and protect the rotating mirror 2, and the output ends of the remaining blowers 7 are communicated with the outer air curtain cavity 9 to blow away the soot generated during the laser working process.

[0049] Through the above structural settings of the present application, the first exhaust gap and the inner air curtain cavity 8 formed by the first annular part 4 and the second annular part 5 arranged around the rotating mirror 2, and at least two groups of the blowers 7 are used to deliver air flow to the inner air curtain cavity 8 to form an air curtain in front of the rotating mirror 2, so as to disperse the soot near the rotating mirror 2 during the laser cleaning process and avoid the problem that the soot adheres to the lens and causes the lens to burn out.

[0050] Secondly, a second exhaust gap formed between the second annular part 5 and the third annular part 6 and the outer air curtain cavity 9, driven by the fan 7, the gas discharged from the second exhaust gap and the gas blown by the first exhaust gap cooperate to quickly remove the soot in the circular tube (gun barrel), so as to ensure the normal operation of the laser device and avoid the reduction of the laser working efficiency due to the blockage of the soot.

[0051] In a preferred embodiment, an acceleration curve is provided on the upper side of the first annular part 4, as Figure 5 shown, and the acceleration curve is a curve of the Laval air flow structure.

[0052] Through the above structural arrangement, the Laval air flow structure is a pipe section structure that first contracts and then expands. In the above structure, the air flow can be accelerated to the sonic state, effectively improving the air flow speed, effectively blowing off the spatter, and greatly reducing the disturbance of the surrounding gas.

[0053] In another preferred embodiment, the second annular part 5 includes a movable ring 51 that can move axially, and an adjusting ring 52 disposed outside the movable ring 51 and threadedly connected thereto. A conical guide ring 53 is disposed inside the movable ring 51. It should be noted that the movable ring 51 is slidably disposed on the second annular part 5, and a limiting chute (not shown in the figure) for preventing the movable ring 51 from coming off is also provided on the second annular part 5;

[0054] The adjusting ring 52 is used to adjust the axial movement of the movable ring 51, control the distance between the conical guide ring 53 and the first exhaust gap, and control the angle of the gas discharged from the first exhaust gap.

[0055] Through the above structural arrangement, by the meshing of the adjusting ring 52 and the movable ring 51, the adjusting ring 52 can be rotated to control the axial movement of the movable ring 51, and the conical guide ring 53 disposed inside the movable ring 51 can act on the gas discharged from the first exhaust gap to change the gas flow direction, so as to form a conical air duct at the front end of the rotating mirror 2, effectively isolating the soot.

[0056] In another preferred embodiment, diffusion air guide vanes 10 are provided in the second exhaust gap;

[0057] A rotating ring 13 is provided in the outer air curtain cavity 9. The diffusion air guide vanes 10 are provided on the rotating ring 13. The diffusion air guide vanes 10 are used to guide the air flow discharged from the second exhaust gap to be discharged obliquely along the diffusion air guide vanes 10.

[0058] Further, a driving unit 11 is also provided on the laser cleaner 1. The output end of the driving unit 11 is provided with a transmission wheel 12 extending into the outer air curtain cavity 9. The transmission wheel 12 is in transmission connection with the rotating ring 13 to drive the rotating ring 13 and the diffusion air guide vanes 10 provided thereon to rotate.

[0059] In the above embodiment, the gas in the outer air curtain cavity 9 is normally discharged from the second exhaust gap. However, a part of the gas can be discharged toward the side deviating from the axis under the action of the diffusion air guide vanes 10 to act on the pipe wall for cleaning, so as to avoid the purpose of soot adsorbing on the inner wall of the circular pipe.

[0060] Furthermore, the rotating ring 13 is used to block the second exhaust gap, and the air in the outer air curtain cavity 9 is discharged through the diffusion air guide vanes 10.

[0061] Compared with the above embodiment, in the present application, the gas inside the outer air curtain cavity 9 is only discharged from the diffusion air guide vanes 10, and the flow velocity of this part of the air flow is large and the action distance is far.

[0062] Further, a hollow motor 3 for driving the rotary mirror 2 to rotate is provided inside the laser cleaner 1;

[0063] The hollow motor 3 has the same rotation speed as the driving unit 11 to guide the gas discharged from the outer air curtain cavity 9 through the diffusion air guide vanes 10 to blow away the soot on the working path of the rotary mirror 2.

[0064] Combined with the above structure, during the actual operation process, when the driving unit 11 drives the rotating ring 13 to rotate, the flue gas on the laser working path can be blown away in advance to provide a relatively clean working space for laser cleaning, effectively improving the working efficiency. It should be noted that the diffusion air guide vanes 10 and the emitting end of the rotary mirror 2 are distributed in a staggered manner so that the air flow can reach the laser working area with a certain advance amount.

[0065] Finally, it should be noted that the number of the blowers 7 is three groups. The three groups of the blowers 7 are equidistantly distributed on the laser cleaner 1. The output ends of two groups of the blowers 7 are communicated with the inner air curtain cavity 8, and the output end of one group of the blowers 7 is communicated with the outer air curtain cavity 9.

[0066] It should be added that a filter screen is provided at the input end of the blower 7 to prevent external impurities from entering the air duct and further extend the service life of the equipment.

[0067] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0068] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0069] In addition, "a plurality of" means two or more.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A laser end air curtain protection mechanism, used to protect a rotating reflector (2) of a laser cleaner (1), characterized in that: include: a first annular portion (4), the first annular portion (4) being arranged in an annular shape around the rotating reflector (2); A second annular portion (5), wherein the second annular portion (5) is sleeved on the outside of the first annular portion (4), and a first exhaust gap and an inner air curtain cavity (8) are left between the first annular portion (4) and the second annular portion (5); A third annular portion (6), wherein the third annular portion (6) is sleeved on the outside of the second annular portion (5), and a second exhaust gap and an outer air curtain cavity (9) are left between the third annular portion (6) and the second annular portion (5); It also includes a plurality of groups of fans (7) arranged on the laser cleaner (1), wherein the output ends of at least two groups of fans (7) are connected to the inner air curtain cavity (8) to block dust and protect the rotating reflector (2), and the output ends of the remaining fans (7) are connected to the outer air curtain cavity (9) to blow away the smoke and dust generated during the laser operation process.

2. According to claim 1, a laser end air curtain protection mechanism is characterized in that: An acceleration curve is provided on the upper side of the first annular portion (4), and the acceleration curve is a curve of a Laval airflow structure.

3. According to claim 1, a laser end air curtain protection mechanism is characterized in that: The second annular portion (5) comprises a movable ring (51) movable in the axial direction, and an adjusting ring (52) arranged outside the movable ring (51) and threadedly connected thereto, and a conical guide ring (53) is arranged inside the movable ring (51); The adjusting ring (52) is used to adjust the axial movement of the movable ring (51) to control the distance between the conical guide ring (53) and the first exhaust gap, so as to control the exhaust angle of the gas in the first exhaust gap.

4. The laser tip air curtain protection mechanism according to claim 1, characterized in that: A diffusion air guide sheet (10) is arranged in the second exhaust gap; A rotating ring (13) is arranged in the outer air curtain cavity (9), and the diffuser air guide plate (10) is arranged on the rotating ring (13). The diffuser air guide plate (10) is used to guide the exhaust air flow in the second exhaust gap to be discharged obliquely along the diffuser air guide plate (10).

5. The laser end air curtain protection mechanism according to claim 4, characterized in that: The laser cleaner (1) is also provided with a driving unit (11), and an output end of the driving unit (11) is provided with a transmission wheel (12) extending into the outer air curtain cavity (9), and the transmission wheel (12) is in driving connection with a rotating ring (13) for driving the rotating ring (13) and a diffusion air guide sheet (10) provided thereon to rotate.

6. The laser tip air curtain protection mechanism according to claim 5, characterized in that: The rotating ring (13) is used to block the second exhaust gap, and the air in the outer air curtain cavity (9) is discharged through the diffusion air guide plate (10).

7. A laser tip air curtain protection mechanism according to claim 6, characterized in that: The laser cleaner (1) is provided with a hollow motor (3) for driving the rotating reflector (2) to rotate; The hollow motor (3) and the driving unit (11) have the same rotation speed, so that the exhaust gas in the outer air curtain cavity (9) is guided by the diffusion air guide sheet (10) to blow away the smoke and dust on the working path of the rotating reflector (2).

8. The laser end air curtain protection mechanism according to claim 1, characterized in that: The number of the fans (7) is three groups, and the three groups of fans (7) are equidistantly distributed on the laser cleaner (1); the output ends of two groups of fans (7) are connected to the inner air curtain cavity (8), and the output end of one group of fans (7) is connected to the outer air curtain cavity (9).

9. The laser end air curtain protection mechanism according to claim 8, characterized in that: The input end of the fan (7) is provided with a filter.

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