Collimating lens positioning structure of laser detection device

Abstract

The utility model provides a collimating mirror positioning structure of a laser detection device, which comprises a laser emission mechanism, a laser transmission line and a collimating mirror, and is characterized in that the laser transmission line and the collimating mirror are fixed through a laser gun barrel; the collimating mirror penetrates through the laser gun barrel, extends out of the laser gun barrel and is fixed at the front end of the laser gun barrel through a collimating mirror positioning structure; the collimating lens positioning structure comprises a notch limiting ring and a positioning cap, the positioning cap is fixedly connected with the front end of the laser gun barrel through threads, and the interior of the positioning cap is used for accommodating the collimating mirror; the cross section of the notch limiting ring is roughly in a C shape, and the notch limiting ring is used for being laterally clamped on a laser transmission line in a sleeving mode. The notch limiting ring is clamped on the laser transmission line and sleeved with the laser gun barrel, and the flange at the tail end of the notch limiting ring abuts against a front end opening of the laser gun barrel, so that the stop collimating mirror is retracted into the laser gun barrel. Through the structure, the collimating mirror can be fixed at a corresponding position at the front end of the gun barrel.

Description

Technical Field

[0001] The present application relates to an optical instrument or system, and more particularly to a collimating mirror positioning structure of a laser detection device that can be used in an online laser measurement project for a blast furnace charge surface. Background Art

[0002] Closed industrial furnaces, such as blast furnaces, have high temperatures, high pressures, and high dust levels. Therefore, observation through observation windows is difficult with the human eye. To address this, various detection devices have been proposed to obtain information from within the furnace, such as infrared cameras and microwave scanners. Some detection devices are located outside the furnace shell, transmitting and / or receiving detection signals through observation windows. However, dust accumulation on these windows can hinder detection. Therefore, the idea is to place detection elements, such as cameras and other sensors, inside the furnace.

[0003] CN1156149C discloses an insertable furnace camera, comprising a camera gun, a tubular cooler, a sealing valve, and a sealing sleeve. A camera and a temperature measuring element are mounted at the front end of the camera gun. The camera gun passes through the sealing sleeve and the sealing valve until it reaches the front end of the tubular cooler, thereby positioning the camera and temperature measuring element at the front end of the camera gun within the blast furnace. Because the camera gun is sealed by both the sealing sleeve and the sealing valve, during blast furnace production, the camera gun can be pulled out between the sealing valve and the sealing sleeve, the sealing valve closed, and then the camera gun can be pulled out of the sealing sleeve for inspection and maintenance. It is important to note that this camera gun has no moving parts.

[0004] CN100424465C discloses using a diverging laser beam to pass through the smoke or dust inside the furnace to form a laser trail to detect information inside the furnace of an industrial kiln. However, it does not describe the details of the laser device that generates the laser beam. CN102382918B discloses using a laser to scan the material surface inside the furnace to detect information about the material surface of a blast furnace. It only generally mentions that the laser can be a laser scanner with a laser deflection device (reflector or prism), where the angle of the emitted laser light is changed by rotating the deflection device. However, CN102382918B does not describe the detailed structure of the laser scanner, nor does it teach how to construct the laser scanner so that it can operate in furnace environments such as high temperature, high pressure, and high dust.

[0005] CN118655697A and CN118655696A applied for by the present applicant both disclose "a laser scanning device". This laser equipment is used in the online laser measurement project of blast furnace charge surface. This structure can place the reflector rotating structure inside the water jacket. However, considering the specific usage scenario, how to fix the laser detection device in the water jacket and realize the laser scanning function together with the water jacket requires solving problems such as how to fix, position, and seal. For example: the laser transmission line is sealed at the tail end of the barrel of the laser scanning device to prevent pressure leakage; the laser collimator needs to be accurately positioned at the front end of the water jacket to align with the reflector. Utility Model Content

[0006] The purpose of this application is to provide a collimator mirror positioning structure for a laser detection device, through which the collimator mirror can be fixed at the corresponding position at the front end of the barrel. The laser generated by the laser is transmitted through the optical fiber, and is converged into a parallel light beam by the collimator mirror and then emitted. The laser beam is then rotated and reflected by the reflector to realize the laser scanning action.

[0007] The collimator mirror positioning structure of the laser detection device of the present application includes: a laser emitting mechanism, a laser transmission line and a collimator mirror, and the laser transmission line and the collimator mirror are fixed by a laser gun barrel; the collimator mirror passes through the laser gun barrel and extends out of the tube, and is fixed to the front end of the laser gun barrel through a collimator mirror positioning structure; the collimator mirror positioning structure includes: a notch limiting ring and a positioning cap; the positioning cap is fixedly connected to the front end of the laser gun barrel by a thread, and the interior of the positioning cap is used to accommodate the collimator mirror; the cross-section of the notch limiting ring is roughly C-shaped, and is used for sideways clamping on the laser transmission line; the notch limiting ring is clamped on the laser transmission line and is installed in the laser gun barrel, and the flange at the tail end of the notch limiting ring is pressed against the front port of the laser gun barrel to achieve the purpose of stopping the collimator mirror from retracting into the laser gun barrel.

[0008] As an improvement to the above technical solution, the notch limiting ring includes a first flange and a second flange, wherein the second flange abuts against the front end of the laser gun barrel, and the first flange stops inside the positioning cap.

[0009] As another improvement of the above technical solution, the positioning cap includes two cylindrical structures, the rear end has a larger diameter, and the front end has a smaller diameter. A limiting step is formed between the rear end and the front end for fixing the collimating lens between the positioning cap and the notch limiting ring.

[0010] Furthermore, the positioning cap also includes a guide slope, which is arranged at the port of the front end to guide the corresponding positioning device.

[0011] The laser transmission line may be one or more optical fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the overall assembly of the laser detection device of the present application for a laser scanning device is shown;

[0013] Figure 2 Shown Figure 1 A cross-sectional view of a laser gun of the laser detection device shown;

[0014] Figure 3 An exploded schematic diagram showing another embodiment of a laser transmission line sealing structure of a laser detection device of the present application;

[0015] Figure 4 yes Figure 3 A cross-sectional view of the sealing structure shown;

[0016] Figure 5 is a cross-sectional view of the collimating mirror positioning structure of the laser detection device of the present application;

[0017] Figure 6 yes Figure 5 An exploded schematic diagram of the collimating mirror positioning structure shown;

[0018] Figure 7a -c is a structural schematic diagram of the notch limiting ring of the collimating mirror positioning structure of the present application.

[0019] Figure ID

[0020] 1. Laser 2. Sealing cap 3. Sealing sleeve

[0021] 4. Ball valve 5. Motor 6. Laser gun casing

[0022] 7. Laser gun barrel 8. Water jacket 9. Connecting rod

[0023] 10. Laser transmission line 11. Collimating lens 12. Laser gun positioning hole

[0024] 13. Reflector

[0025] 20. Sealing structure

[0026] 21. Through-hole nut 22. Gun tail seal seat 23. Notch gasket

[0027] 24. Notch sealing gasket 25. Fixing nut 26. Barrel thread

[0028] 30. Collimating mirror positioning structure

[0029] 31. Notch limiting ring 32. Limiting step 33. Positioning cap

[0030] 34. Guide ramp 35. First flange 36. Second flange DETAILED DESCRIPTION

[0031] The technical solution of the present application is described in detail below with reference to the accompanying drawings and embodiments. In these drawings, the same or similar components are marked with the same or similar reference numerals.

[0032] like Figure 1 FIG. 1 is a schematic diagram of the overall assembly of the laser detection device of the present application in a laser scanning device. For the sake of simplicity of description, the following will be Figure 1 The left end is called the tail end, and the right end is called the front end.

[0033] Laser light generated by laser 1 is transmitted via laser transmission line 10. Laser transmission line 10 and collimator 11 are mounted within a thin, cylindrical laser barrel 7. Collimator 11 is secured to the front end of the barrel, while laser transmission line 10 is sealed and secured to the rear end of the barrel 7 with a sealing cap 2. Laser barrel 7 passes through sealing sleeve 3, ball valve 4, and laser barrel 6 in the laser scanning device and enters the inner cavity of water jacket 8. It can be positioned slightly toward the bottom and snapped into laser gun positioning hole 12, facing reflector 13.

[0034] The reflector 13 is located at the front end of the water jacket 8 and extends out of the water jacket 8 through the connecting rod 9 to connect to the motor 5. When the motor 5 moves, the reflector 13 can be driven to rotate through the connecting rod 9. The parallel laser beam is focused by the collimating lens 11 and reflected by the reflector 13 to achieve laser scanning.

[0035] The laser gun barrel is a slender tubular structure used to install and fix the laser transmission line and the collimator, transfer the light outlet of the collimator to the front end of the water jacket, and irradiate the laser on the reflector at the front end of the water jacket. The structural design of this application is intended to place the larger diameter laser located at the tail end and the collimator located at the front end on the outside of the water jacket 8, and only place the laser transmission line and the collimator inside the laser gun barrel, separating the laser emission mechanism, making the structure simpler, easier to operate and maintain. Since only the laser transmission line and the collimator are retained inside the laser gun barrel, the structure is greatly simplified, the diameter of the laser gun barrel can be reduced, and the cross-sectional area is reduced under the blast furnace pressure vessel, thereby reducing the pressure it bears. The laser gun barrel designed in this application is small and light, and the plugging and unplugging of the laser gun barrel is simple, which facilitates the online replacement of the laser transmission line collimator.

[0036] like Figures 2-4As shown, the laser transmission line sealing structure 20 at the tail of the laser gun barrel includes a gun tail sealing seat 22, the two ends of which are respectively threadedly connected to the through-hole nut 21 and the laser gun barrel 7, and the cross-section is roughly H-shaped. The internal aperture can pass the collimator 11 and its laser transmission line 10, but because it needs to be sealed and the laser transmission line is relatively thin, the present application installs a notch gasket 23 to clamp the laser transmission line and press it against the tail end side of the internal step of the gun tail sealing seat 22, and then clamps one or more notch sealing gaskets 24 on the laser transmission line 10. In this embodiment, the notch sealing gasket 24 is a slit cut in half to be clamped on the laser transmission line 10, and there is a small hole in the middle to hold the laser transmission line tightly. Then, another notch gasket 23 can be installed, and the through-hole nut 21 presses the outer notch gasket 23 to compress the sealing gasket 24, as shown in FIG. Figure 4 Alternatively, directly use the through-hole nut 21 to compress the sealing gasket 24, as shown Figure 2 The through-hole nut 21 is threadedly connected to the gun tail sealing seat 22. During the tightening process, the notched gasket 23 is compressed, causing the seal 24 to deform and seal the laser transmission line, preventing pressure leakage from the gun tail.

[0037] In addition, as an improvement, the laser gun barrel 7 (the end of which is threadedly connected to the gun tail sealing seat 22) can also be provided with a barrel thread 26 on the outside for installing a fixing nut 25, which can cooperate with external equipment to further fix the laser gun barrel 7.

[0038] like Figure 4 As shown, the through-hole nut 21 is also hollow in the middle, through which the collimator lens passes. It has internal threads that connect to the gun tail seal 22 and compress the notched gasket 23 and sealing gasket 24 to achieve a seal. As an improvement, the through-hole nut has a hexagonal flat on the outside, allowing a wrench to tighten the nut. The other end of the through-hole nut has external threads for connecting to a protective hose.

[0039] In actual use, the notch gasket 23 is generally made of metal and requires a certain strength; the sealing rubber gasket 24 can be an ordinary rubber gasket.

[0040] like Figure 5 As shown in Figures 7 to 7 , the collimating mirror positioning structure of the laser detection device of the present application includes: a notch limiting ring 31 , a limiting step 32 , a positioning cap 33 and a guide slope 34 .

[0041] The collimator lens passes through the laser gun barrel 7 and extends out of the tube. A notch limit ring 31 is inserted into the laser transmission line 10 to block the collimator lens 11 and prevent the collimator lens 11 from retracting. The front end of the laser gun barrel 7 has an external thread for connecting the positioning cap 33 and fixing the collimator lens 11 in the positioning cap 33.

[0042] like Figure 5 and Figure 6 As shown, the rear end of the positioning cap 33 has a larger diameter for accommodating the collimator 11, while the front end has a smaller diameter. A retaining step 12 is formed between the rear and front ends to accurately secure the collimator 11 in place and prevent it from moving forward or backward. Furthermore, a guide ramp 34 can be provided at the front end of the positioning cap 33 to facilitate entry into the positioning hole in the water jacket and retain it in position. This guide ramp can also be a chamfered design.

[0043] like Figure 7a As shown, the cross section of the notch limiting ring 31 is roughly C-shaped, which is stuck on the laser transmission line 10 and is installed in the laser gun barrel 7, and the flange at its tail end is against the front end of the laser gun barrel 7. As long as the diameter of its notch is smaller than the collimating lens 11, it can block the collimating lens 11 from retracting into the laser gun barrel 7.

[0044] like Figure 7b As shown, the notch limiting ring 31 provided in this embodiment is provided with a first flange 35 and a second flange 36, wherein the second flange 36 abuts against the front end of the laser gun barrel 7, and the first flange 35 stops in the positioning cap 33. In actual implementation, the first flange 35 is not necessary.

[0045] The extra "gaps" mentioned in this application are because the laser transmission line is a thin, long tube, and the two ends of the laser transmission line are respectively a laser and a collimator. In order to solve the problem of the package, the relevant components are all provided with circumferential gaps, and the relevant components can be directly inserted sideways through the gaps / gaps.

[0046] The laser transmission line 10 may be one or more optical fibers.

[0047] The laser detection device of the present application can be installed on an industrial furnace such as a blast furnace, with its head end extending into the furnace and its tail end located outside the furnace. However, it is understood that the laser detection device can also be used in other types of industrial furnaces or other occasions where laser scanning is required.

[0048] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of this application and are not intended to limit the scope of the present invention. Although this application has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions to the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be encompassed by the claims of this application.

Claims

1. A collimating mirror positioning structure for a laser detection device, characterized in that: It includes: a laser emitting mechanism, a laser transmission line and a collimating mirror, wherein the laser transmission line and the collimating mirror are fixed by a laser gun barrel; The collimator lens passes through the laser gun tube and extends out of the tube, and is fixed to the front end of the laser gun tube through a collimator lens positioning structure; The collimating mirror positioning structure includes: a notch limiting ring and a positioning cap; The positioning cap is fixedly connected to the front end of the laser gun barrel through a thread, and the interior of the positioning cap is used to accommodate the collimating lens; The cross-section of the notch limit ring is roughly C-shaped, and is used for sideways clamping on the laser transmission line; the notch limit ring is clamped on the laser transmission line and is installed in the laser gun barrel, and the flange at the tail end of the notch limit ring is pressed against the front port of the laser gun barrel to stop the collimator mirror from retracting into the laser gun barrel.

2. The collimating mirror positioning structure according to claim 1, characterized in that: The notch limiting ring includes a first flange and a second flange, wherein the second flange abuts against the front end of the laser gun barrel, and the first flange stops in the positioning cap.

3. The collimating mirror positioning structure according to claim 1 or 2, characterized in that: The positioning cap includes two cylindrical structures, the rear end has a larger diameter and the front end has a smaller diameter. A limiting step is formed between the rear end and the front end for fixing the collimator between the positioning cap and the notch limiting ring.

4. The collimating mirror positioning structure according to claim 3, characterized in that: The positioning cap further comprises a guide slope, which is arranged at the port of the front end portion to guide the corresponding positioning device.

5. The collimating mirror positioning structure according to claim 1, characterized in that: The laser transmission line may be one or more optical fibers.

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