Sealing structure

Abstract

The utility model provides a sealing structure which comprises a gun tail sealing seat with an approximately H-shaped section, threads are arranged at the two ends of the gun tail sealing seat, the gun tail sealing seat is fixedly connected with a via hole nut and a laser gun barrel respectively, a containing space is formed between the gun tail sealing seat and the via hole nut and used for arranging a notch sealing rubber mat, and the notch sealing rubber mat is pressed through hard connection on the two sides; a small hole is formed in the middle of the notch sealing rubber mat and used for tightly holding the laser transmission line, a gap is formed in the half side of the notch sealing rubber mat, the notch sealing rubber mat is used for being laterally clamped on the laser transmission line in a sleeving mode, and the notch sealing rubber mat is in interference fit with the gun tail sealing base. The number of the notch sealing rubber pads is two or more than two, and gaps are arranged in a staggered mode. According to the sealing piece, the lateral clamping design is adopted, ingenious sealing of the long and thin pipe part is achieved, and the sealing piece is particularly suitable for the situation that the end is large and sealing is not facilitated.

Description

Technical Field

[0001] The present application relates to a sealing structure, which is particularly suitable for use on slender round tubes. 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 seal it, for example: sealing the laser transmission line at the tail end of the barrel of the laser scanning device to prevent pressure leakage.

[0006] Since the laser gun barrel is a slender tubular structure with a laser emitting mechanism at one end and a collimating lens at the other end, when the tubular structure needs to be sealed, the laser emitting mechanism and collimating lens at both ends are much larger than the tubular structure itself. Currently, there is no technical solution for sealing such a structure. Utility Model Content

[0007] The present application aims to provide a sealing structure, particularly useful for sealing a laser transmission line against the rear end of a laser scanning device's barrel to prevent pressure leakage. Of course, this structure is not limited to sealing laser transmission lines or high-pressure environments. The seal in this application utilizes a side-entry design, enabling ingenious sealing of slender tubes. This design is particularly suitable for applications where larger ends pose a significant risk of sealing problems.

[0008] The sealing structure of the present application includes a gun tail sealing seat with a roughly H-shaped cross-section, with threads provided at both ends, which are respectively fixedly connected to the through-hole nut and the laser gun barrel, and a accommodating space is formed between the through-hole nut, which is used to set the notch sealing gasket, and the notch sealing gasket is pressed by the hard connection on both sides; the notch sealing gasket has a small hole in the middle, which is used to hug the laser transmission line, and a slit is cut in half of it for side-mounted on the laser transmission line, and the notch sealing gasket and the gun tail sealing seat have an interference fit.

[0009] As an improvement to the above technical solution, the number of the notch sealing rubber pads is two or more, and the gaps are staggered, which can optimize the sealing effect.

[0010] Furthermore, the sealing structure also includes a notch gasket, which is arranged between the notch sealing pad and the internal step of the gun tail sealing seat, or / and between the notch sealing pad and the through-hole nut; the notch gasket is made of metal, and has a notch arranged on the side. The inner diameter of the notch is slightly larger than the small hole in the middle of the notch sealing pad, and is used to be clamped on the laser transmission line.

[0011] Theoretically, as long as the notch sealing gasket is squeezed, a sealing effect can be achieved. Therefore, the hard connections on both sides can be set according to the situation. However, in the embodiment of the present application, due to the need to penetrate the laser transmission line and the collimator, the gap between the through-hole nut and the center of the sealing structure is still relatively large. In order to effectively squeeze the notch sealing gasket, it is preferred to add a gasket with a certain hardness. The inner diameter of the notch is slightly larger than the small hole in the middle of the notch sealing gasket, which is more conducive to squeezing the notch sealing gasket. It can extend inward and outward at the same time to achieve a better sealing effect.

[0012] In practical applications, the through-hole nut is hollow in the middle, and one end is provided with an internal thread connected to the external thread at the end of the gun tail sealing seat, and the other end may also be provided with an external thread to connect to the protective hose.

[0013] As another improvement to the above technical solution, the sealing pad can be a common rubber pad. The through-hole nut can be a hexagonal nut to facilitate tightening. The transmission line can be one or more optical fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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;

[0015] Figure 2 Shown Figure 1 A cross-sectional view of a laser gun of the laser detection device shown;

[0016] 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;

[0017] Figure 4 yes Figure 3 A cross-sectional view of the sealing structure shown;

[0018] Figure 5 is a cross-sectional view of the collimating mirror positioning structure of the laser detection device of the present application;

[0019] Figure 6 yes Figure 5 An exploded schematic diagram of the collimating mirror positioning structure shown;

[0020] Figure 7a -c is a structural schematic diagram of the notch limiting ring of the collimating mirror positioning structure of the present application.

[0021] Figure ID

[0022] 1. Laser 2. Sealing cap 3. Sealing sleeve

[0023] 4. Ball valve 5. Motor 6. Laser gun casing

[0024] 7. Laser gun barrel 8. Water jacket 9. Connecting rod

[0025] 10. Laser transmission line 11. Collimating lens 12. Laser gun positioning hole

[0026] 13. Reflector

[0027] 20. Sealing structure

[0028] 21. Through-hole nut 22. Gun tail seal seat 23. Notch gasket

[0029] 24. Notch sealing gasket 25. Fixing nut 26. Barrel thread

[0030] 30. Collimating mirror positioning structure

[0031] 31. Notch limiting ring 32. Limiting step 33. Positioning cap

[0032] 34. Guide ramp 35. First flange 36. Second flange DETAILED DESCRIPTION

[0033] The technical solution of the present application is described in detail below with reference to the accompanying drawings and embodiments. In these drawings, identical or similar components are denoted by identical or similar reference numerals. Furthermore, the sealing structure of the present application is not limited to use in the laser detection device of the embodiments.

[0034] like Figure 1 The figure shows the schematic diagram of the assembly of the laser detection device of the present application in the laser scanning device. For the sake of simplicity, the following will be Figure 1 The left end is called the tail end, and the right end is called the front end.

[0035] 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.

[0036] 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.

[0037] 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 and the collimator.

[0038] 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 tighten 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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 .

[0043] 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.

[0044] like Figure 5 and Figure 6 As shown, the rear end of the positioning cap 33 has a larger diameter for accommodating the collimator lens 11, while the front end has a smaller diameter. A travel-limiting step 12 between the rear and front ends precisely secures the collimator lens in place, preventing forward and backward movement. Furthermore, a guide ramp 34 may be provided at the front end of the positioning cap 33 to facilitate entry into the positioning hole in the water jacket and retain the position.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] The laser transmission line 10 may be one or more optical fibers.

[0049] 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.

[0050] 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 sealing structure comprising a gun tail seal seat with a generally H-shaped cross-section, with threads at both ends fixedly connected to a through-hole nut and a laser gun barrel, respectively. A receiving space is formed between the through-hole nut and the seal seat, which is used to accommodate a notch sealing gasket, and the notch sealing gasket is compressed by hard connections on both sides. The notch sealing rubber pad has a small hole in the middle for hugging the laser transmission line, and a slit is cut on half of the side for sideways clamping on the laser transmission line, and the notch sealing rubber pad and the gun tail sealing seat have an interference fit.

2. The sealing structure according to claim 1, wherein: The number of the notch sealing rubber pads is 2 or more, and the gaps are staggered.

3. The sealing structure according to claim 1 or 2, characterized in that: The sealing structure further includes a notch gasket, which is arranged between the notch sealing rubber pad and the inner step of the gun tail sealing seat, or / and between the notch sealing rubber pad and the through-hole nut; The notched gasket is made of metal and has a notch on the side. The inner diameter of the notch is slightly larger than the small hole in the middle of the notch sealing gasket and is used for being clamped on the laser transmission line.

4. The sealing structure according to claim 3, characterized in that: The through-hole nut is hollow in the middle, and one end is provided with an internal thread connected to the external thread at the end of the gun tail sealing seat, and the other end can also be provided with an external thread to connect the protective hose.

5. The sealing structure according to claim 1, wherein: The sealing rubber pad is an ordinary rubber pad.

6. The sealing structure according to claim 1, wherein: The through-hole nut is a hexagonal nut.

7. The sealing structure according to claim 1, wherein: The transmission line may be one or more optical fibers.

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