Diaphragm applied to industrial online LIBS (laser-induced breakdown spectroscopy)

Abstract

The utility model discloses a diaphragm applied to industrial online LIBS (Laser-induced Breakdown Spectroscopy), which comprises a laser protection lens, an annular LIBS signal collection lens, a first connecting piece with a first through hole in the center, and a second connecting piece with a second through hole in the center, wherein an annular groove is formed in the surface of the first connecting piece; and an annular boss is arranged on the surface of the second connecting piece and is matched with the annular groove, so that an inner annular groove for fixing the laser protection lens and an outer annular groove for fixing the LIBS signal collection lens are formed between the first connecting piece and the second connecting piece. According to the laser protection lens, on one hand, the laser transmittance is improved, and on the other hand, the service life of the diaphragm is prolonged; the first connecting piece is matched with the second connecting piece, so that the leakproofness of the diaphragm is ensured while the laser protection lens and the LIBS signal collection lens are connected, and gas circulation interaction between two surfaces of the diaphragm is prevented; and meanwhile, dust accumulation is prevented, and the cleanliness of the center laser protection lens is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of optics, in particular to a window piece applied to industrial on-line LIBS. Background Art

[0002] Industrial on-line LIBS equipment is installed on the iron ore production line of the steel mill (operating 24 hours a day). Inevitably, there are many dusts and water vapors during the operation of the iron ore production line. While the equipment needs to be isolated and sealed from the external environment, it is also necessary to ensure the laser emission and the collection of LIBS signals. For this purpose, a transparent glass piece for a specific spectral band is required as a medium for the equipment to connect with the outside world. The traditional window piece is generally a piece of glass. After being installed, the equipment can work normally. However, after a long time, dust and water vapor will accumulate on the window piece (even if there are corresponding purging and cleaning measures for the window piece, it is inevitable), interact with the laser, resulting in damage to the serial port piece, greatly reducing its service life. And it is extremely troublesome to replace the equipment window piece on the production line and there are worker safety problems. Content of the Utility Model

[0003] In order to solve the deficiencies in the prior art, the utility model provides a window piece applied to industrial on-line LIBS. The setting of the laser protection lens improves the laser transmittance on the one hand and the service life of the window piece on the other hand; the setting of the LIBS signal collection lens has good transmittance and heat resistance for ultraviolet, visible, and near-infrared signals (200 - 1100 nm), which is beneficial to the collection of LIBS signals of the sample; the cooperation of the first connecting piece and the second connecting piece, while connecting the laser protection lens and the LIBS signal collection lens, ensures the tightness of the window piece and prevents gas from flowing and interacting on both sides of the window piece; at the same time, the cooperation of the annular boss of the second connecting piece and the annular groove of the first connecting piece helps to prevent the accumulation of dust, maintain the cleanliness of the central laser protection lens, and also ensures the transmission efficiency of the LIBS signal.

[0004] The utility model realizes the above object through the following technical solutions:

[0005] A window piece applied to industrial on-line LIBS includes a laser protection lens, an annular LIBS signal collection lens, a first connecting piece, and a second connecting piece. A first through hole is provided in the center of the first connecting piece, and an annular groove is provided on the surface of the first connecting piece facing the second connecting piece; a second through hole is provided in the center of the second connecting piece, and an annular boss adapted to the annular groove is provided on the surface of the second connecting piece facing the first connecting piece; the annular boss and the annular groove cooperate to form an inner ring groove for fixing the laser protection lens and an outer ring groove for fixing the LIBS signal collection lens between the first connecting piece and the second connecting piece, and the inner ring groove and the outer ring groove are respectively located inside and outside the annular boss.

[0006] An annular sealing ring is provided between the first connecting member, the second connecting member and the LIBS signal collecting lens.

[0007] A first annular sealing groove communicating with the annular groove is provided on the surface of the first connecting member facing the second connecting member. A second annular sealing groove communicating with the first annular sealing groove is provided on the outer ring of the annular boss. The annular sealing ring is arranged in the annular gap formed by the first annular sealing groove and the second annular sealing groove.

[0008] A third annular sealing groove is provided on the surface of the second connecting member facing the first connecting member. A fourth annular sealing groove communicating with the third annular sealing groove is provided on the outer ring of the annular boss. The annular sealing ring is arranged in the annular gap formed by the third annular sealing groove and the fourth annular sealing groove.

[0009] The first connecting member and the second connecting member are connected by screws.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] 1. For the window piece of the present utility model, the center for laser emission is a laser protection lens, which improves the laser transmittance on the one hand and the service life of the window piece on the other hand; the LIBS signal collecting lens is used for the passage of LIBS signals and has good transmittance and heat resistance to ultraviolet, visible, and near-infrared signals (200 - 1100 nm), which is beneficial to the collection of LIBS signals of the sample; the cooperation of the first connecting member and the second connecting member connects the laser protection lens and the LIBS signal collecting lens while ensuring the airtightness of the window piece and preventing gas flow interaction on both sides of the window piece; at the same time, the cooperation of the annular boss of the second connecting member and the annular groove of the first connecting member helps prevent dust accumulation and maintain the cleanliness of the central laser protection lens.

[0012] 2. The cooperation of the first annular sealing groove, the second annular sealing groove and the annular sealing ring of the window piece of the present utility model, or / and the cooperation of the third annular sealing groove, the fourth annular sealing groove and the annular sealing ring form an efficient sealing system, effectively preventing the intrusion of dust and water vapor, avoiding the damage of the window piece caused by their interaction with the laser, and prolonging the service life of the window piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 is a schematic structural diagram of the present utility model.

[0014] Attached Figure 2 is an exploded structural diagram of the present utility model.

[0015] Attached Figure 3 is a schematic structural diagram of the first connecting member of the present utility model.

[0016] Appended Figure 4 is a schematic cross-sectional structure view of the present utility model.

[0017] Reference numerals shown in the appended drawings: 1, laser protection lens; 2, signal collection lens; 3, first connecting member; 31, first through hole; 32, annular groove; 33, first annular sealing groove; 4, second connecting member; 41, second through hole; 42, annular boss; 43, second annular sealing groove; 44, third annular sealing groove; 45, fourth annular sealing groove; 5, annular sealing ring. Specific embodiments

[0018] In order to make the objectives, technical solutions and advantages of the technical solutions of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the appended drawings of specific embodiments of the present utility model. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0019] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present utility model belongs. The "first", "second" and similar terms used in the description and claims of the present utility model patent do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0020] Such as Figures 1-4As shown in the figure, the utility model provides a window piece applied to industrial on-line LIBS, which includes a laser protection lens 1, an annular LIBS signal collection lens 2, a first connecting piece 3, and a second connecting piece 4. The laser protection lens 1 is used for laser emission, and the LIBS signal collection lens 2 is used for the passage of LIBS signals. It has good transmittance and heat resistance to ultraviolet, visible, and near-infrared signals (200-1100nm), which is beneficial to the collection of LIBS signals of samples. A first through hole 31 is provided at the center of the first connecting piece 3, and an annular groove 32 is provided on the surface of the first connecting piece 3 facing the second connecting piece 4. A second through hole 41 is provided at the center of the second connecting piece 4, and an annular boss 42 adapted to the annular groove 32 is provided on the surface of the second connecting piece 4 facing the first connecting piece 3. The annular boss 42 is matched with the annular groove 32 to form an inner ring groove for fixing the laser protection lens 1 and an outer ring groove for fixing the LIBS signal collection lens 2 between the first connecting piece 3 and the second connecting piece 4. The inner ring groove and the outer ring groove are respectively located inside and outside the annular boss 42.

[0021] When the window piece of the utility model is in use, it is installed on the laser emission optical path of industrial on-line LIBS, and the second connecting piece 4 faces outward. The laser protection lens 1 for laser emission is at the center of the window piece of the utility model. On the one hand, it improves the laser transmittance, and on the other hand, it improves the service life of the window piece. The cooperation between the first connecting piece 3 and the second connecting piece 4 connects the laser protection lens 1 and the LIBS signal collection lens 2 while ensuring the airtightness of the window piece and preventing gas from flowing and interacting on both sides of the window piece. At the same time, the cooperation between the annular boss 42 of the second connecting piece 4 and the annular groove 32 of the first connecting piece is conducive to preventing the accumulation of dust and maintaining the cleanliness of the central laser protection lens 1.

[0022] Furthermore, annular sealing rings 5 are arranged between the first connecting piece 3, the second connecting piece 4 and the LIBS signal collection lens 2 to further improve the airtightness of the window piece.

[0023] Furthermore, a first annular sealing groove 33 communicating with the annular groove 32 is provided on the surface of the first connecting piece 3 facing the second connecting piece 4. A second annular sealing groove 43 communicating with the first annular sealing groove 33 is provided on the outer circle of the annular boss 42. The annular sealing ring 5 is arranged in the annular gap formed by the first annular sealing groove 33 and the second annular sealing groove 43.

[0024] Furthermore, a third annular sealing groove 44 is provided on the surface of the second connecting piece 4 facing the first connecting piece 3. A fourth annular sealing groove 45 communicating with the third annular sealing groove 44 is provided on the outer circle of the annular boss 42. The annular sealing ring 5 is arranged in the annular gap formed by the third annular sealing groove 44 and the fourth annular sealing groove 45.

[0025] The first annular sealing groove 33 and the second annular sealing groove 43 cooperate with the annular sealing ring 5, and / or the third annular sealing groove 44 and the fourth annular sealing groove 45 cooperate with the annular sealing ring 5 to form an efficient sealing system, effectively preventing the intrusion of dust and water vapor, avoiding the damage of the window caused by their interaction with the laser, and extending the service life of the window.

[0026] Furthermore, the first connecting member 3 and the second connecting member 4 are connected by screws, making the installation and disassembly process of the entire window simple and fast.

[0027] Those skilled in the art should understand that the above specific embodiments are merely examples rather than limitations, and various modifications, combinations, partial combinations, and substitutions can be made to the embodiments of the present invention according to design requirements and other factors, as long as they are within the scope of the appended claims or their equivalents, that is, within the scope of the rights to be protected by the present invention.

Claims

1. A window sheet used for industrial online LIBS, characterized in that: It includes a laser protection lens, an annular LIBS signal collecting lens, a first connecting member, and a second connecting member. The first connecting member is provided with a first through hole at the center, and an annular groove is provided on the surface of the first connecting member facing the second connecting member; the second connecting member is provided with a second through hole at the center, and an annular boss adapted to the annular groove is provided on the surface of the second connecting member facing the first connecting member; the annular boss cooperates with the annular groove to form an inner annular groove for fixing the laser protection lens and an outer annular groove for fixing the LIBS signal collecting lens between the first connecting member and the second connecting member, and the inner annular groove and the outer annular groove are respectively located on the inner circle and outer circle of the annular boss.

2. A window sheet for industrial online LIBS according to claim 1, characterized in that: An annular sealing ring is provided between the first connecting member, the second connecting member and the LIBS signal collecting lens.

3. A window sheet for industrial online LIBS according to claim 2, characterized in that: The surface of the first connecting member facing the second connecting member is provided with a first annular sealing groove connected with the annular groove, the outer ring of the annular boss is provided with a second annular sealing groove connected with the first annular sealing groove, and the annular sealing ring is arranged in an annular gap formed by the first annular sealing groove and the second annular sealing groove.

4. A window sheet for industrial online LIBS according to claim 2, characterized in that: A third annular sealing groove is arranged on the surface of the second connecting member facing the first connecting member, a fourth annular sealing groove connected to the third annular sealing groove is arranged on the outer ring of the annular boss, and the annular sealing ring is arranged in an annular gap formed by the third annular sealing groove and the fourth annular sealing groove.

5. The window sheet used for industrial online LIBS according to claim 1, characterized in that: The first connecting member and the second connecting member are connected via screws.

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