Flange short pipe positioning device and method

Abstract

The present application provides a flange short tube positioning device and method, wherein the flange short tube includes a tube and a flange fixedly connected to one end face of the tube; the positioning device includes: a center positioning disk, the outer contour of which forms a clearance fit with the inner wall of the tube so as to be able to slide along the tube inside the tube; a cylindrical center axis tube, the head end of which passes through the center of the center positioning disk and is fixedly connected to the center positioning disk at the head end; a fixing plate flange-connected to the flange disk; a support tube passing through the center of the fixing plate; the tail end of the center axis tube passes through the support tube and is clearance fit with the support tube; a cylindrical laser pen mounting seat, the head end of which is detachably connected to the center axis tube; a laser pen, the head end of which is inserted into the tail end of the laser pen mounting seat and fixedly connected to the laser pen mounting seat. The advantage of the present application is that it can accurately locate the installation angles of two relative flange short tubes.

Description

Technical Field

[0001] The present application relates to the field of optical instruments and positioning construction, and specifically to a flange short pipe positioning device and method. Background Art

[0002] Closed industrial furnaces, such as blast furnaces, have high temperatures, high pressures, and high dust levels within them, making observation through observation windows difficult. To address this, various detection devices have been proposed to obtain information about the furnace interior, such as infrared cameras and microwave scanners. Some of these 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. Consequently, the concept of placing detection elements, such as cameras and other sensors, within the furnace has been proposed.

[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] CN202265588U and CN102382918A disclose a laser scanner inserted into a kiln. The laser beam emitted by a laser device positioned above the material surface is used to continuously scan the material surface. A camera captures an image of the material surface, which includes a pattern of detection points formed when the laser beam is incident on the material surface. An image processing device receives the material surface image output from the camera and generates material surface information. The overall arrangement direction of the laser is obliquely downward relative to the horizontal direction.

[0005] CN217005725U discloses a blast furnace laser gating imaging detection device that uses two horizontally opposed laser scanners to scan the material surface to obtain surface information. Although the two laser scanners appear to be arranged substantially horizontally in the figure disclosed in the document, there is no requirement for the two laser scanners to have a precise relative positional relationship.

[0006] When installing the existing plug-in furnace laser scanner on the furnace, it is necessary to first weld a flange short tube on the furnace observation hole, and then fix the laser scanner in the flange short tube and extend it into the furnace for scanning. After the flange short tube is welded, its angle with the furnace can no longer be changed, and the scanning direction of the laser scanner in the furnace is also determined. If the welding angle of the flange short tube deviates, the installation angle of the laser scanner will also deviate, which will seriously affect the subsequent laser scanner's scanning work inside the furnace. Therefore, the fixing angle of the flange short tube must be precise to ensure the accuracy of the generated material surface image. The existing technology usually uses a protractor, a level, etc. to fix the angle of the flange short tube. The accuracy of this measurement method is often insufficient, and the construction site where the furnace is located often does not have good measurement conditions, and very precise measuring instruments cannot be used, which makes the work of welding the flange short tube very difficult. Summary of the Invention

[0007] In order to overcome the defects of the prior art, the present application proposes a flange short pipe positioning device, wherein the flange short pipe comprises a pipe and a flange fixedly connected to one end face of the pipe; the positioning device comprises:

[0008] A center positioning disk, whose outer contour forms a clearance fit with the inner wall of the tube so that it can slide along the tube inside the tube; a cylindrical center axis tube, whose head end passes through the center of the center positioning disk and is fixedly connected to the center positioning disk at the head end; a fixing plate, which is used to be flange-connected to the flange disk; a support tube passing through the center of the fixing plate; the tail end of the center axis tube passes through the support tube and has a clearance fit with the support tube; a cylindrical laser pen mounting base, whose head end is detachably connected to the tail end of the center axis tube; a laser pen, whose head end is inserted into the tail end of the laser pen mounting base and is fixedly connected to the laser pen mounting base.

[0009] Preferably, the center positioning plate has a first opening.

[0010] Preferably, the first openings are two semicircular openings.

[0011] Preferably, the first openings are a plurality of fan-shaped openings extending from the center to the edge.

[0012] Preferably, the fixing plate is a long strip plate structure; both ends of the fixing plate have screw holes for connecting with the flange of the flange.

[0013] Preferably, the side wall of the support tube has a first positioning hole extending therethrough, allowing a positioning element to pass through the first positioning hole to securely connect the central axis tube and the fixing plate.

[0014] Preferably, the tail end portion of the central axis tube has an external thread; the head end portion of the laser pen mounting seat has an internal thread; and the tail end portion of the central axis tube is threadedly connected to the head end portion of the laser pen mounting seat.

[0015] Preferably, the side wall of the rear end portion of the laser pen mounting base has a penetrating second positioning hole, allowing a positioning element to pass through the second positioning hole to securely connect the laser pen and the laser pen mounting base.

[0016] The present application also provides a flange short pipe positioning method, which is implemented based on the above positioning device and includes:

[0017] Place the flange short pipe with the positioning device installed into the opening of the furnace shell;

[0018] Turn on the laser pen and adjust the angle of the flange short tube until the laser emitted by the laser pen irradiates the set position, thereby positioning the angle of the flange short tube.

[0019] The present application also provides a flange short pipe positioning method, which is implemented based on the above positioning device and is used for positioning two opposing flange short pipes, comprising:

[0020] Place the two flange short pipes with the positioning devices installed into the openings of the furnace shell;

[0021] Turn on the laser pens of the two positioning devices in turn, adjust the angles of the flange short tubes, and make the laser emitted by the other laser pen shine into the central axis tube of the positioning device to locate the angles of the two flange short tubes.

[0022] Preferably, the two flange short pipes with the positioning devices installed are basically placed horizontally relative to each other.

[0023] The present application also provides a flange short pipe positioning method, which is implemented based on the above positioning device and is used for positioning two opposing flange short pipes, comprising:

[0024] Putting the two flange short pipes with the positioning devices installed into the opening of the furnace shell; one of the positioning devices is not installed with the laser pointer;

[0025] Turn on the laser pen of the positioning device on which the laser pen is installed, adjust the angle of the flange short tube, and make the laser emitted by the laser pen pass through the central axis tube of the other positioning device, so as to locate the angles of the two flange short tubes.

[0026] 1. No other angle measuring tools are needed to realize the angle positioning during flange short pipe welding, which saves manpower, has accurate positioning and fast construction speed;

[0027] 2. Able to accurately locate the installation angles of two relative flange short pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure shows a schematic diagram of two opposing laser scanners scanning the material surface in the kiln;

[0029] Figure 2 The figure shows the installation of flange short pipe on the furnace;

[0030] Figure 3 The figure shows the front view of the flanged short pipe;

[0031] Figure 4 Shown is a stereoscopic view of the installation positioning device;

[0032] Figure 5 Shown is a cross-sectional view of the installation positioning device;

[0033] Figure 6 Shown is a front view of the center positioning plate;

[0034] Figure 7 Shown is a front view of the fixing plate;

[0035] Figure 8 Shown are the right side view and right side cross-sectional view of the fixing plate;

[0036] Figure 9 Shown is a cross-sectional view of the laser pointer mount;

[0037] Figure 10 The figure shows a schematic diagram of a flange short pipe with a positioning device installed on a furnace;

[0038] Figure 11 The diagram shows two opposing flange short pipes installed on a furnace. DETAILED DESCRIPTION

[0039] The technical solution of this application is described in detail below with reference to the accompanying drawings.

[0040] like Figure 1As shown, to capture an image of the material surface within a kiln, two laser scanners are mounted opposite each other on the kiln. The two laser scanners emit laser light toward the material surface and scan along a vertical plane, creating a series of bright spots on the surface. These bright spots are then used to create an image of the material surface. Because the material surface has a certain degree of undulation, a single laser scanner inevitably has blind spots. Therefore, two laser scanners are positioned opposite each other to obtain a complete surface image. When scanning with two laser scanners, it is crucial to ensure that the scanning planes formed by the two laser scanners are essentially aligned; otherwise, the resulting image of the material surface will not match the actual image. Therefore, it is crucial to ensure that the two laser scanners are aligned after installation. To ensure that the two laser scanners are mounted coplanarly, they must be mounted on the kiln opposite each other so that the laser beams emitted by the two laser scanners are essentially aligned.

[0041] like Figure 2 As shown, when installing the laser scanner on the furnace, it is necessary to first weld a flange short pipe 1 on the furnace observation hole, and then fix the laser scanner in the flange short pipe.

[0042] like Figure 3 As shown, the flange short pipe 1 welded on the furnace includes a flange 101 and a pipe 102 fixedly connected to the flange 101. For the sake of simplicity of description, the following will be Figure 3 The left end is called the tail end, and the right end is called the head end. The side of the furnace has an opening that extends through the furnace shell and accommodates pipe 102. During installation, a portion of pipe 102 extends into the furnace through the opening, with flange 101 positioned outside the furnace. Pipe 102 is then welded to the opening.

[0043] Example 1

[0044] like Figure 4 and Figure 5 As shown, the present application provides a straight flange short pipe positioning device comprising:

[0045] A center positioning plate 201 can slide along the tube 102 inside the tube 102. The center positioning plate 201 can be a disc-shaped structure with a diameter slightly smaller than the inner diameter of the tube 102, so that its outer contour forms a clearance fit with the inner wall of the tube 102. Figure 6As shown, the center positioning disk 201 may have a first central opening 2011 extending through the center, and two first openings 2012 extending through the center opening 2011 may be provided adjacent to the first central opening 2011. The first opening 2012 may be semicircular in shape. In other embodiments, the first openings 2012 may be multiple fan-shaped openings extending from the center to the edges. The first openings 2012 minimize the weight of the center positioning disk 201, making the positioning device lightweight. Furthermore, the first openings 2012 reduce the obstruction area and expand the hollow area, allowing operators to conveniently observe the laser irradiation position within the kiln from outside the kiln.

[0046] The head end of a cylindrical central shaft tube 202 can pass through the first central opening 2011 of the central positioning disk 201, and the central positioning disk 201 can be detachably fixed to the head end of the central shaft tube 202. The tail end of the central shaft tube 202 can be detachably connected to a fixing plate 203.

[0047] like Figure 7 and Figure 8 As shown, the fixing plate 203 can be an elongated plate-like structure with screw holes 2032 at each end for flange connection to the flange 101. Using only two screw holes 2032 for flange connection to the flange 101, the fixing plate 203 significantly reduces the overall mass of the positioning device while ensuring a secure connection. Furthermore, a maximum amount of clearance is provided around the fixing plate 203, ensuring the operator has ample viewing space, allowing for convenient observation of the laser irradiation location within the furnace from outside. The fixing plate 203 can also have a through-opening at its center, from which a support tube 2031 can extend. After the fixing plate 203 is flange-connected to the flange 101, the central axis of the support tube 2031 can be aligned with the central axis of the flange short tube 1. A first positioning hole 2033 can be provided through the sidewall of the support tube 2031. The head end of the central axis tube 202 can extend through the support tube 2031, forming a clearance fit with the inner wall of the support tube 2031. The first positioning hole 2033 may have an internal thread, and a jackscrew may be used to screw into the first positioning hole 2033 to tighten the head end of the central shaft tube 202, so that the fixing plate 203 is fixedly connected to the central shaft tube 202. Using the jackscrew to fix the central shaft tube 202 and the fixing plate 203 can, on the one hand, prevent the central shaft tube 202 from rotating and moving after being fixed to the fixing plate 203, and on the other hand, it can also be used to adjust the length of the central shaft tube 202 extending into the tube 102 to accommodate the positioning of flange short tubes 1 of different lengths. In other embodiments, the fixing plate 203 may also be a plate-like structure of other shapes, such as a disc-shaped structure similar to the central positioning plate 201, with a threaded hole on the edge for flange connection, a support tube in the center, and a second opening near the support tube.

[0048] After the tail end of the central axis tube 202 passes through the support tube 2031, it can be detachably connected to the head end of a laser pen mounting base 204. Figure 9 As shown, the laser pen mount 204 can be cylindrical, with the rear end thereof adapted to receive the laser pen 205. The sidewall of the rear end of the laser pen mount 204 can have a second positioning hole 2041 extending therethrough. The second positioning hole 2041 can be internally threaded. After the laser pen 205 is inserted into the rear end of the laser pen mount 204, a screw can be screwed into the second positioning hole 2041 to tighten the laser pen 205, thereby securing the laser pen 205 to the laser pen mount 204.

[0049] In this embodiment, the tail end portion of the central axis tube 202 may have an external thread, and the head end portion of the laser pen mounting base 204 may have an internal thread, and the two are connected by threads.

[0050] The support tube 2031 and the center positioning plate 201 serve as two left and right fulcrums to support the positioning device together, ensuring that the center axis of the positioning device and the center axis of the flange short tube 1 are basically in a straight line, so that the laser emitted by the laser pen is on the extension line of the center axis of the flange short tube 1.

[0051] The center positioning disk 201 and the tube 102 are clearance-fitted, with a tiny gap between them. The center positioning disk 201 should be as far away from the fixing plate 203 as possible to minimize the angular deviation between the center axis of the positioning device and the center axis of the flange short tube 1. The diameter setting of the center positioning disk 201 needs to be able to easily fit into the tube 102, while minimizing the gap between it and the inner wall of the tube 201. This places high demands on the processing of the center positioning disk 201. The inventors of this application have discovered that the length of the center axis tube 202 can actually be used to reduce this processing accuracy requirement. Through experiments, it was found that when the length of the center axis tube 202 reaches 200-400 times the difference between the inner diameter of the tube 201 and the diameter of the center positioning disk 201, the positioning accuracy of the flange short tube can be met.

[0052] During installation, securely connect the head end of the central axis tube 202 to the central positioning disk 201, and the tail end to the fixing plate 203. Then, place the central positioning disk 201 into the flanged short tube 1, and flange-connect the fixing plate 203 to the flange 101. Secure the laser pen 205 to the laser pen mount 204, and securely connect the head end of the laser pen 204 to the tail end of the central axis tube 202. Finally, place the flanged short tube 102 with the positioning device installed into the opening of the furnace shell. Turn on the laser pen, and adjust the angle of the flanged short tube 1 until the laser light from the laser pen hits the set position. This confirms that the angle of the flanged short tube 1 is appropriate, and welding can begin. The set position can be a convenient location, such as the joints between steel bricks in the furnace wall.

[0053] The schematic diagram of using the positioning device to position the flange short pipe is as follows Figure 10 shown.

[0054] Example 2

[0055] The present application also provides a flange short pipe positioning method, which is implemented based on the above-mentioned flange short pipe positioning device and may include:

[0056] Step 1: Place the flanged short pipe with the positioning device installed into the opening of the furnace shell.

[0057] Step 2: Turn on the laser pen and adjust the angle of the flange short pipe until the laser emitted by the laser pen illuminates the set position. This confirms that the angle of the flange short pipe is appropriate and you can start welding.

[0058] Example 3

[0059] When using a laser scanner to scan a furnace, it is often necessary to use two laser scanners facing each other to scan simultaneously. Therefore, two flanged short pipes 1 must be installed at opposing positions on the furnace. The two flanged short pipes 1 must be positioned opposite each other, with their central axes aligned. When the two flanged short pipes are positioned opposite each other, they can be horizontal or at a small angle relative to the horizontal without affecting the subsequent laser scanning effect.

[0060] The present application also provides a flange short pipe positioning method, which is based on the above-mentioned flange short pipe positioning device and is used for positioning two opposing flange short pipes, and may include:

[0061] Step 1: Place the two flanged short pipes with the positioning devices installed into the openings of the furnace shell.

[0062] Step 2: Turn on the laser pens of the two positioning devices in turn, adjust the angle of the flange short tube, and make the laser emitted by the other laser pen shine into the central axis tube of this positioning device. This will determine that the angle of the flange short tube is appropriate and you can start welding.

[0063] The schematic diagram of using the positioning device to position two opposite flange short pipes is as follows: Figure 11 shown.

[0064] The installation accuracy of the flange stub can be controlled by setting the appropriate laser diameter and the inner diameter of the central axis tube. After multiple tests, when using a laser pointer with a laser diameter of approximately 5 mm and a central axis tube with an inner diameter of approximately 6 mm, the positioning error range can be controlled to less than 0.1°. This ensures that the central axis of the subsequently installed laser scanner is essentially aligned, meeting the precision requirements for generating accurate surface patterns.

[0065] Example 4

[0066] The present application also provides a flange short pipe positioning method, which is implemented based on the above-mentioned flange short pipe positioning device and is used for positioning two opposing flange short pipes, and may include:

[0067] Step 1: Place two flange short pipes with the positioning devices installed into the openings of the furnace shell. One of the positioning devices may not be installed with a laser pointer, or may not be installed with a laser pointer and a laser pointer mounting base.

[0068] Step 2: Turn on the laser pen of the positioning device installed with the laser pen, adjust the angle of the flange short tube, and ensure that the laser emitted by the laser pen passes through the central axis tube of the other positioning device. This can determine that the angle of the flange short tube is appropriate and you can start welding.

[0069] When using a laser pointer for angle adjustment, the length and inner diameter of the central axis tube are factors that affect the installation accuracy of the flange short tube. Through experiments, it was found that when the inner diameter of the central axis tube is 1.1-1.5 times the laser diameter and the length is 400-600 times the laser diameter, the positioning accuracy of the flange short tube can be met.

[0070] CN102382918A discloses a laser scanner inserted into a furnace. The scanning planes of the two lasers are often not precisely aligned, which can cause errors in subsequent material surface shape simulation and calculation. According to the present application, after the two flanged short tubes are positioned and the two laser guns are installed, their central axes are substantially aligned, ensuring that the scanning planes of the two lasers are substantially aligned.

[0071] 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 flange short pipe positioning device, the flange short pipe comprising a pipe and a flange fixedly connected to one end face of the pipe; the positioning device comprising: a center positioning plate, the outer contour of which forms a clearance fit with the inner wall of the tube so as to be able to slide inside and along the tube; A cylindrical central shaft tube, the head end of which passes through the center of the central positioning disk and is fixedly connected to the central positioning disk at the head end; A fixing plate is used to be flange-connected to the flange; a support tube is passed through the center of the fixing plate; the tail end of the central axis tube passes through the support tube and is in clearance fit with the support tube; a cylindrical laser pointer mounting base, the head end of which is detachably connected to the tail end of the central axis tube; and A laser pen, the head end of which is inserted into the tail end of the laser pen mounting base and is fixedly connected to the laser pen mounting base; The fixing plate is a long strip-shaped plate structure; both ends of the fixing plate have screw holes for connecting with the flange of the flange; The central positioning plate has a first opening; The side wall of the support tube has a first positioning hole extending therethrough, allowing a positioning element to pass through the first positioning hole to securely connect the central axis tube and the fixing plate; The side wall of the rear end portion of the laser pen mounting seat has a penetrating second positioning hole, which allows a positioning element to pass through the second positioning hole to fix the laser pen and the laser pen mounting seat in connection.

2. The flange short pipe positioning device according to claim 1, characterized in that: The first openings are two semicircular openings.

3. The flange short pipe positioning device according to claim 1, characterized in that: The first openings are a plurality of fan-shaped openings extending from the center to the edge.

4. The flange short pipe positioning device according to claim 1, characterized in that: The tail end of the central axis tube has an external thread; the head end of the laser pen mounting seat has an internal thread; the tail end of the central axis tube is threadedly connected to the head end of the laser pen mounting seat.

5. A flange short pipe positioning method, implemented based on the positioning device according to any one of claims 1 to 4, comprising: Place the flange short pipe with the positioning device installed into the opening of the furnace shell; Turn on the laser pen and adjust the angle of the flange short tube until the laser emitted by the laser pen irradiates the set position, thereby positioning the angle of the flange short tube.

6. A flange short pipe positioning method, implemented based on the positioning device according to any one of claims 1 to 4, for positioning two opposing flange short pipes, comprising: Place the two flange short pipes with the positioning devices installed into the openings of the furnace shell; Turn on the laser pens of the two positioning devices in turn, adjust the angles of the flange short tubes, and make the laser emitted by the other laser pen shine into the central axis tube of the positioning device to locate the angles of the two flange short tubes.

7. The flange short pipe positioning method according to claim 6, characterized in that: The two flange short pipes with the positioning devices installed are basically placed horizontally relative to each other.

8. A flange short pipe positioning method, implemented based on the positioning device according to any one of claims 1 to 4, for positioning two opposing flange short pipes, comprising: Place the two flange short pipes with the positioning devices installed into the openings of the furnace shell; in A positioning device is not equipped with the laser pointer; Turn on the laser pen of the positioning device on which the laser pen is installed, adjust the angle of the flange short tube, and make the laser emitted by the laser pen pass through the central axis tube of the other positioning device, so as to locate the angles of the two flange short tubes.

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