Laser remote derusting equipment capable of conveniently adjusting focal length

Abstract

The utility model discloses laser remote derusting equipment convenient to adjust focal length, which comprises a laser derusting case provided with an optical fiber and a tripod positioned on one side of the laser derusting case, an optical fiber head is arranged at one end, far away from the laser derusting case, of the optical fiber, and the optical fiber head is connected with a laser derusting head positioned on the upper part of the tripod. The laser derusting head comprises a shell, a collimating mirror, a beam expander, a protective mirror, a galvanometer and a long-focus focus lens, wherein the collimating mirror, the beam expander, the protective mirror, the galvanometer and the long-focus focus lens are sequentially arranged in the shell. A collimating adjusting ring and a focal length adjusting ring which rotate relative to the shell are fixedly connected to the periphery of the collimating mirror and the periphery of the long-focus focus lens correspondingly. The diameter of a laser beam can be enlarged to a larger collimated output light beam, the output distance of the laser beam is increased, the laser derusting device can be used for derusting a bridge in a longer distance, and in the laser derusting process, the collimating mirror can be matched with a long-focus focusing mirror, so that smaller focusing light spots and higher energy density can be obtained; the laser derusting device can be suitable for remote laser derusting work of various distances, and the laser derusting efficiency of large bridges is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser rust removal, in particular to a laser remote rust removal device convenient for adjusting the focal length. Background Art

[0002] A large steel structure bridge, that is, a bridge built with steel structure. Generally, the overall steel consumption of such a bridge reaches more than 50%. Its main body consists of a large number of steel structure parts. After producing the parts, they are assembled and welded. It is a relatively fashionable new bridge construction method at present. Since a large number of steel structure parts are installed outdoors and are exposed to wind, sun, rain, and snow, the steel structure parts will inevitably be rusted and corroded. Especially in many heavy industrial areas, the air quality is poor, and the content of harmful acidic gases in the air seriously exceeds the standard, which will further accelerate the rusting speed of the steel structure parts, damage the overall strength and stability of the steel structure parts, pose potential safety hazards during the use of the bridge, and even may seriously shorten the service life of the steel structure bridge. Therefore, rust removal of the large bridge steel structure parts is a necessary step for bridge maintenance.

[0003] Traditional handheld device rust removal and chemical rust removal require the installation of equipment such as scaffolding and hanging baskets for high-altitude operations, which are time-consuming, laborious, and have low rust removal efficiency. Laser rust removal technology uses the characteristics of high energy and high concentration of laser to irradiate the workpiece to be processed, so that the attachments (dirt, scale, rust spots, organic coatings, etc.) on the surface of the substrate absorb the laser energy, and then melt, vaporize and volatilize, instantaneously heat-expand and are driven by the vapor to break away from the surface of the substrate, so as to achieve the purpose of purifying the surface of the substrate. It has the advantages of high efficiency, pollution-free, low cost, safety and reliability, and wide application range, and is replacing the traditional rust removal methods. However, the existing laser rust removal methods can only be applied to bridge equipment at a certain height. The typical rust removal distance is 5m - 10m. For large bridges over 10m, limited by the insufficient length of the laser fiber, it is impossible to perform rust removal on large bridges at a long distance. Still, it is necessary for workers to install the entire laser rust removal device on a lift or an aerial work vehicle for rust removal, which not only complicates the operation but also reduces the efficiency of laser rust removal. Content of the Utility Model

[0004] To solve the technical problem in the prior art that it is impossible to perform rust removal on large bridges at a long distance, and it is still necessary for workers to install the entire laser rust removal device on a lift or an aerial work vehicle, which not only complicates the operation but also reduces the efficiency of laser rust removal, the utility model provides the following technical solutions.

[0005] The utility model relates to a laser remote rust removal device which is convenient for adjusting the focal length, comprising a laser rust removal machine box provided with an optical fiber and a tripod located on one side of the laser rust removal machine box. One end of the optical fiber far away from the laser rust removal machine box is provided with an optical fiber head, and the optical fiber head is connected with a laser rust removal head located on the upper part of the tripod. The laser rust removal head comprises a shell and a collimating mirror, a beam expander, a protective mirror, a galvanometer scanner and a long focal length focusing mirror which are sequentially arranged in the shell. The outer peripheries of the collimating mirror and the long focal length focusing mirror are respectively fixedly connected with a collimation adjusting ring and a focal length adjusting ring which rotate relative to the shell.

[0006] As a further technical solution, a rotating motor is fixedly connected below the tripod. The output end of the rotating motor passes through the upper end of the tripod and is connected with a horizontal turntable, and the horizontal turntable is connected to the laser rust removal head.

[0007] As a further technical solution, the rotating motor is a deceleration self-locking motor.

[0008] As a further technical solution, two oppositely arranged support plates are fixedly arranged on the upper end of the horizontal turntable. A brushless motor is fixedly connected to the outside of one of the support plates. The output end of the brushless motor is connected with a rotating shaft rotatably connected with the support plate, and the rotating shaft is connected with a bracket with a laser rust removal head arranged on the upper part.

[0009] As a further technical solution, monitoring cameras and ranging sensors are arranged on both sides of the laser rust removal head on the upper part of the bracket.

[0010] As a further technical solution, the ranging sensor is a laser ranging sensor.

[0011] The beneficial effects of the utility model are as follows: in the shell of the laser rust removal head of the utility model, a collimating mirror, a beam expander, a protective mirror, a galvanometer scanner and a long focal length focusing mirror are sequentially arranged, and a collimation adjusting ring and a focal length adjusting ring are arranged on the outer periphery of the shell, so that the collimating mirror and the long focal length focusing mirror can be adjusted. The collimating mirror can expand the diameter of the laser beam to a larger collimated output beam, improve the output distance of the laser beam, and can be used for rust removal of bridges at a farther distance. In laser rust removal, the collimating mirror can cooperate with the long focal length focusing mirror to obtain a smaller focusing spot and a higher energy density, and can be applicable to remote laser rust removal work at various distances, improving the laser rust removal efficiency of large bridges. The laser rust removal head is also connected with a horizontal turntable and a bracket, and monitoring cameras and ranging sensors are arranged on both sides of the bracket, which is convenient for rust removal of a large-area bridge at a long distance and in multiple ranges, reduces the movement of the whole device, and further improves the rust removal efficiency. Description of the Drawings

[0012] Figure 1 is the overall structural schematic diagram of the utility model;

[0013] Figure 2It is a schematic diagram of the connection of the laser rust removal head of the present utility model;

[0014] Figure 3 It is a schematic diagram inside the laser rust removal head housing of the present utility model;

[0015] In the figure: 1 - laser rust removal machine case; 101 - optical fiber; 2 - tripod; 3 - rotating motor; 4 - horizontal turntable; 401 - support plate; 5 - brushless motor; 6 - bracket; 7 - laser rust removal head; 701 - housing; 702 - collimation adjustment ring; 703 - focal length adjustment ring; 8 - monitoring camera; 9 - ranging sensor; 10 - optical fiber head; 11 - collimating mirror; 12 - beam expander; 13 - protective mirror; 14 - galvanometer scanner; 15 - long - focal - length focusing mirror. Specific embodiments

[0016] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0017] In the description of the present utility model, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0018] As Figure 1 and Figure 2 shown, a laser remote rust removal device for facilitating focal length adjustment according to the present utility model includes a laser rust removal machine case 1 provided with an optical fiber 101 and a tripod 2 located on one side of the laser rust removal machine case 1. The tripod 2 is used to place the laser rust removal head 7. The laser rust removal machine case 1 is connected to an external industrial control computer for controlling the rust removal process at a long distance. One end of the optical fiber 101 away from the laser rust removal machine case 1 is provided with an optical fiber head 10, and the optical fiber head 10 is connected to a laser rust removal head 7 located above the tripod 2. The optical fiber 101 uses a 10 - m optical fiber. On the premise of ensuring the laser rust removal power, the optical fiber 101 should not be too long.

[0019] In a preferred embodiment, a rotary motor 3 is fixedly connected below the tripod 2. The rotary motor 3 is a speed reduction self-locking motor. The output end of the rotary motor 3 passes through the upper end of the tripod 2 and is connected to a horizontal turntable 4. The horizontal turntable 4 is connected to the laser rust removal head 7, and the laser rust removal head 7 can rotate with the horizontal turntable 4. In addition to the galvanometer in the laser rust removal head 7 itself that can increase the rust removal area, under the rotation of the rotary motor 3, the laser rust removal head 7 can also increase the rust removal area and reduce the movement of the entire device.

[0020] In a preferred embodiment, two oppositely arranged support plates 401 are fixedly provided on the upper end of the horizontal turntable 4. A brushless motor 5 is fixedly connected to the outside of one of the support plates 401. A rotating shaft is rotatably connected between the two support plates 401, and the rotating shaft is connected to the output end of the brushless motor 5. The rotating shaft is fixedly connected to a bracket 6, and the upper part of the bracket 6 is connected to the laser rust removal head 7. Thus, the brushless motor 5 can drive the laser rust removal head 7 to rotate vertically up and down, increasing the rust removal area and further reducing the movement of the entire device. A monitoring camera 8 and a distance measuring sensor 9 are provided on the upper part of the bracket 6 on both sides of the laser rust removal head 7. The distance measuring sensor 9 is a laser distance measuring sensor. The monitoring camera 8 and the distance measuring sensor 9 can further detect the distance and rust removal position of the bridge to be rust removed, and can transmit the cleaning picture to the industrial control computer in real time, facilitating the observation and control of the operator.

[0021] As Figure 2 and Figure 3 shown, in a preferred embodiment, the laser rust removal head 7 includes a housing 701 and a collimating mirror 11, a beam expander 12, a protective mirror 13, a galvanometer 14, and a long focal length focusing mirror 15 sequentially arranged in the housing 701. The laser beam emitted by the optical fiber head 10 can be converted into parallel light through the collimating mirror 11 and the beam expander 12, the diameter of the laser beam output by the optical fiber head 10 can be expanded and the divergence angle of the laser beam can be reduced, the diameter of the laser beam can be expanded to a larger collimated output beam, and the output distance of the laser beam can be increased, which can be used for rust removal of bridges at a farther distance. In laser rust removal, the collimating mirror 11 can cooperate with the long focal length focusing mirror 15 to obtain a smaller focused spot and a higher energy density.

[0022] In a preferred embodiment, a collimating adjustment ring 702 and a focal length adjustment ring 703 that rotate relative to the housing 701 are respectively fixedly connected to the outer peripheries of the collimating mirror 11 and the long focal length focusing mirror 15. By turning the collimating adjustment ring 702 and the focal length adjustment ring 703, the collimating mirror 11 and the long focal length focusing mirror 15 can be adjusted to adapt to more different long-distance rust removal tasks. The collimating adjustment ring 702 and the focal length adjustment ring 703 can be manually turned, or a brushless motor can be configured to remotely control them, and no special limitation is made on this.

[0023] The preferred specific embodiments and examples of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above-mentioned embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A laser remote rust removal device convenient for adjusting the focal length, comprising a laser rust removal machine case (1) provided with an optical fiber (101) and a tripod (2) located on one side of the laser rust removal machine case (1). One end of the optical fiber (101) far away from the laser rust removal machine case (1) is provided with an optical fiber head (10), and the optical fiber head (10) is connected with a laser rust removal head (7) located on the upper part of the tripod (2), and is characterized in that: The laser rust removal head (7) includes a housing (701), and a collimating mirror (11), a beam expander (12), a protective mirror (13), a galvanometer (14), and a long focal length focusing mirror (15) are sequentially arranged in the housing (701). A collimating adjustment ring (702) and a focal length adjustment ring (703) that rotate relative to the housing (701) are fixedly connected to the outer peripheries of the collimating mirror (11) and the long focal length focusing mirror (15), respectively.

2. The laser remote rust removal device capable of facilitating focal length adjustment according to claim 1, wherein: A rotary motor (3) is fixedly connected below the tripod (2). The output end of the rotary motor (3) passes through the upper end of the tripod (2) and is connected to a horizontal turntable (4), and the horizontal turntable (4) is connected to the laser rust removal head (7).

3. The laser remote rust removal device for facilitating focal length adjustment according to claim 2, characterized in that: The rotary motor (3) is a deceleration self-locking motor.

4. The laser remote rust removal device for facilitating focal length adjustment according to claim 2, wherein: Two oppositely arranged support plates (401) are fixedly provided on the upper end of the horizontal turntable (4). A brushless motor (5) is fixedly connected to the outside of one of the support plates (401). The output end of the brushless motor (5) is connected to a rotating shaft rotatably connected to the support plate (401), and the rotating shaft is connected to a bracket (6) with a laser rust removal head (7) provided on the upper part.

5. The laser remote rust removal device with adjustable focal length according to claim 4, characterized in that: Monitoring cameras (8) and ranging sensors (9) are provided on the upper part of the bracket (6) on both sides of the laser rust removal head (7).

6. The laser remote rust removal device for facilitating focal length adjustment according to claim 5, characterized in that: The ranging sensor (9) is a laser ranging sensor.

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