Flange short pipe positioning device and method

Abstract

The invention provides a flange short pipe positioning device and method. A flange short pipe comprises a pipe and a flange plate fixedly connected with one end face of the pipe. The positioning device comprises a central positioning disc, the outer contour of which is in clearance fit with the inner wall of the pipe, so that the central positioning disc can slide in the pipe along the pipe; the head end part of the cylindrical central shaft tube penetrates through the center of the central positioning disc, and the head end part of the cylindrical central shaft tube is fixedly connected with the central positioning disc; the fixing plate is in flange connection with the flange plate; a penetrating supporting pipe is arranged in the center of the fixing plate; the tail end part of the central shaft tube penetrates through the supporting tube and is in clearance fit with the supporting tube; the head end part of the cylindrical laser pen mounting seat is detachably connected with the central shaft tube; and the head end part of the laser pen is inserted into the tail end part of the laser pen mounting seat and is fixedly connected with the laser pen mounting seat. The positioning device has the advantage that the mounting angle of the two opposite flange short pipes can be accurately positioned.

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 temperature, high pressure, high dust and other furnace environments, so it is difficult to observe through the observation window with human eyes. To this end, various detection devices have been proposed to obtain information inside the furnace, such as infrared cameras, microwave scanning, etc. Some of these detection devices are arranged outside the furnace shell and transmit and / or receive detection signals through the observation window, but this will hinder detection because the observation window is prone to dust accumulation. Therefore, people imagine that detection elements such as sensors such as cameras are arranged inside the furnace.

[0003] CN1156149C discloses an insertable furnace camera, which includes a camera gun, a tubular cooler, a sealing valve and a sealing sleeve. A camera and a temperature measuring element are installed 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, so that the camera and the temperature measuring element at the front end of the camera gun are located in the blast furnace. Since the camera gun is sealed by the sealing sleeve and the sealing valve, the sealing valve can be closed when the camera gun is pulled out between the sealing valve and the sealing sleeve during the blast furnace production process, and then the camera gun can be pulled out from the sealing sleeve for inspection and maintenance. It should be noted that there are no moving parts in the camera gun.

[0004] CN202265588U and CN102382918A disclose a laser scanner inserted into a kiln, which continuously scans the material surface using a laser beam emitted by a laser arranged above the material surface, and a camera captures a material surface image, which includes a detection point pattern formed by the laser beam incident on the material surface. An image processing device receives the material surface image output from the camera to generate 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, which uses two horizontally oppositely mounted laser scanners to scan the material surface to obtain material surface information. Although the two laser scanners in the figure disclosed in the document appear to be arranged basically in the horizontal direction, there is no requirement that the two laser scanners have an accurate relative position relationship with each other.

[0006] When installing the existing plug-in kiln laser scanner on the kiln, it is necessary to first weld a flange short tube on the kiln observation hole, and then fix the laser scanner in the flange short tube and extend it into the kiln for scanning. After the flange short tube is welded, its angle with the kiln cannot be changed, and the scanning direction of the laser scanner in the kiln is also determined accordingly. If the welding angle of the flange short tube is deviated, the installation angle of the laser scanner will also be deviated, which will seriously affect the subsequent laser scanner's scanning work inside the kiln. Therefore, the fixed angle of the flange short tube must be accurate 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 kiln is located often does not have good measurement conditions, and it is impossible to use very precise measuring instruments, 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, the flange short pipe comprising 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 supporting tube passing through the center of the fixing plate; the tail end of the center axis tube passes through the supporting tube and has a clearance fit with the supporting tube; a cylindrical laser pen mounting seat, 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 seat and is fixedly connected to the laser pen mounting seat.

[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-shaped structure; both ends of the fixing plate have screw holes for connecting with the flange of the flange plate.

[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 fix the central axis tube and the fixing plate in connection.

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

[0015] Preferably, the side wall of the rear end portion of the laser pen mounting seat has a penetrating second positioning hole, allowing the laser pen and the laser pen mounting seat to be fixedly connected by a positioning element passing through the second positioning hole.

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

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

[0018] The angle of the flange short tube can be located by turning on the laser pen and adjusting the angle of the flange short tube until the laser emitted by the laser pen irradiates the set position.

[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 relative flange short pipes, including:

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

[0021] The laser pens of the two positioning devices are turned on in sequence, and the angles of the flange short tubes are adjusted so that the laser emitted by the other laser pen irradiates the central axis tube of the positioning device, thereby positioning the angles of the two flange short tubes.

[0022] Preferably, the two flange short pipes on which the positioning devices are installed are basically placed horizontally opposite 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 relative flange short pipes, including:

[0024] Put 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 pen;

[0025] The angles of the two flange short tubes can be located by turning on the laser pen of the positioning device on which the laser pen is installed and adjusting the angles of the flange short tubes so that the laser emitted by the laser pen passes through the central axis tube of the other positioning device.

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

[0027] 2. It can 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 schematic diagram of the flange short pipe installed on the furnace;

[0030] Figure 3 The front view of the flanged short pipe is shown;

[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 section view of the fixing plate;

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

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

[0038] Fig.11 The figure shows a schematic diagram of two opposing flange short pipes installed on a furnace. DETAILED DESCRIPTION

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

[0040] like Figure 1As shown, when acquiring images of the material surface in the kiln, two laser scanners need to be installed at relative positions on the kiln. The two laser scanners emit lasers to the material surface and scan along a vertical plane, forming a series of bright spots on the material surface. Based on these irradiated bright spots, the image of the material surface can be drawn. Since the surface of the material surface has certain waves, a laser scanner will inevitably have blind spots when scanning. Therefore, two laser scanners are set at relative positions for scanning to obtain a complete surface image of the material surface. When using two laser scanners for scanning, it must be ensured that the planes formed by the two laser scanners are basically in the same plane, otherwise the generated material surface image will not match the actual image. Therefore, it must be ensured that the two laser scanners are located on the same plane after installation. In order to meet the requirements of coplanar installation of the two laser scanners, the two laser scanners need to be installed on the kiln in relative positions so that the lasers emitted by the two laser scanners are basically in a straight line.

[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 in the figure is called the tail end, and the right end is called the head end. The side of the furnace has an opening that penetrates the furnace shell and can accommodate the pipe 102. During installation, a portion of the pipe 102 extends into the furnace from the opening, the flange 101 is located outside the furnace, and then the pipe 102 is 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 in the tube 102. The center positioning plate 201 can be a disc-shaped structure, and its diameter is slightly smaller than the inner diameter of the tube 102, so that its outer contour is in a clearance fit with the inner wall of the tube 102. Figure 6As shown, the center of the center positioning disk 201 may have a first center opening 2011 that runs through it, and two first openings 2012 that run through it may be provided next to the first center opening 2011. The shape of the first opening 2012 is semicircular. In other embodiments, the first opening 2012 may also be a plurality of fan-shaped openings extending from the center to the edge. The first opening 2012 can reduce the weight of the center positioning disk 201 as much as possible, making the positioning device lightweight. At the same time, the first opening 2012 also reduces the blocking area and expands the hollow area, so that the operator can conveniently observe the position of the laser irradiation in the kiln from the outside of 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 a long strip plate structure, and its two ends can have screw holes 2032 for flange connection with the flange 101. The fixing plate 203 is flange-connected with the flange 101 using only two screw holes 2032, which greatly reduces the overall mass of the positioning device while ensuring the fixed connection. At the same time, there is also a gap as large as possible around the fixing plate 203, which can ensure that the operator has as large an observation space as possible, and it is convenient to observe the position of laser irradiation in the furnace from the outside of the furnace. The center position of the fixing plate 203 can also have a through opening, and the opening can extend the support tube 2031 outward. After the fixing plate 203 is flange-connected with the flange 101, the central axis of the support tube 2031 can coincide with the central axis of the flange short tube 1. The side wall of the support tube 2031 can have a through first positioning hole 2033. The head end of the central axis tube 202 can pass through the support tube 2031 and form a clearance fit with the inner wall of the support tube 2031. The first positioning hole 2033 may have an internal thread, and a top screw 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 top screw 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 adapt to the positioning of the flange short tube 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 shape 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 rear 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 seat 204. Fig. 9 As shown, the laser pen mounting seat 204 may be a cylindrical structure, and the rear end portion thereof may be inserted with the laser pen 205. The side wall of the rear end portion of the laser pen mounting seat 204 may have a second positioning hole 2041 that penetrates through. The second positioning hole 2041 may have an internal thread. After the laser pen 205 is inserted into the rear end portion of the laser pen mounting seat 204, a top screw may be screwed into the second positioning hole 2041 to tighten the laser pen 205, so that the laser pen 205 is fixedly connected to the laser pen mounting seat 204.

[0049] In this embodiment, the tail end of the central axis tube 202 may have an external thread, and the head end of the laser pen mounting seat 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 located 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 put the tube 102 in, and to minimize the gap between the inner wall of the tube 201, which places high processing requirements on the center positioning disk 201. The inventor of the present application found that the length of the center axis tube 202 can actually be used to reduce this processing accuracy requirement. It was found through experiments 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, the head end of the central axis tube 202 is fixedly connected to the central positioning disk 201, and the tail end is fixedly connected to the fixing plate 203. Then the central positioning disk 201 is placed in the flange short tube 1, and the fixing plate 203 is flange-connected to the flange 101. Then the laser pen 205 is fixed to the laser pen installation 204, and the head end of the laser pen 204 is fixedly connected to the tail end of the central axis tube 202. Finally, the tube 102 of the flange short tube 1 with the positioning device installed is placed into the opening of the furnace shell, the laser pen is turned on, and the angle of the flange short tube 1 is adjusted until the laser emitted by the laser pen irradiates the set position, so that the angle of the flange short tube 1 is determined to be appropriate, and welding can be started. The set position can be a place that is convenient for positioning, such as the joint of steel bricks on the furnace wall in the furnace.

[0053] The schematic diagram of positioning the flange short pipe using the positioning device is as follows Fig.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 tube until the laser emitted by the laser pen shines on the set position. This means that the angle of the flange short tube is appropriate and you can start welding.

[0058] Example 3

[0059] When a laser scanner is used for laser scanning in a furnace, two relative laser scanners are often required to scan simultaneously. Therefore, two flange short tubes 1 need to be installed at relative positions on the furnace. The positions of the two flange short tubes 1 need to be relative, and the central axes are a straight line. When the two flange short tubes are relative, they can be horizontally relative or have a small angle relative to the horizontal direction, which will not affect the effect of subsequent laser scanning.

[0060] 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 relative flange short pipes, and may include:

[0061] Step 1: Place 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, so that the angle of the flange short tube can be determined to be appropriate and welding can begin.

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

[0064] The installation accuracy of the flange short tube can be controlled by setting the appropriate laser diameter and the inner diameter of the center axis tube. After many tests, when a laser pen with a laser diameter of about 5 mm and a center axis tube with an inner diameter of about 6 mm is used, the positioning error range can be controlled below 0.1°, which can ensure that the central axis of the laser scanner installed later is basically in a straight line, meeting the accuracy requirements for generating accurate material 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 relative 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 pen, or may not be installed with a laser pen and a laser pen 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 pen to adjust the angle, the length and inner diameter of the center axis tube are a factor that affects the installation accuracy of the flange short tube. Through experiments, it was found that when the inner diameter of the center 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 kiln, and the scanning planes of the two lasers are usually not accurately located in the same plane, which will cause errors in the subsequent shape simulation and calculation of the material surface. According to the two flange short tubes positioned in the present application, after installing two laser guns, their central axes are basically located in the same straight line, which can ensure that the scanning planes of the two lasers are basically in the same plane.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application is described in detail with reference to the embodiments, a person skilled in the art should understand that any modification or equivalent replacement of the technical solution of the present application does not depart from the spirit and scope of the technical solution of the present application and should be included in the scope of the claims of the present 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 comprises: 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 for connecting with the flange of the flange plate; the center of the fixing plate has a support tube passing through; 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 pen mounting seat, the head end of which is detachably connected to the tail end of the central axis tube; and The head end of the laser pen is inserted into the tail end of the laser pen mounting seat and is fixedly connected to the laser pen mounting seat.

2. The flange short pipe positioning device according to claim 1, characterized in that: The center positioning plate is provided with a first opening.

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

4. The flange short pipe positioning device according to claim 2, characterized in that: The first openings are a plurality of fan-shaped openings extending from the center to the edge.

5. The flange short pipe positioning device according to claim 1, characterized in that: The fixing plate is a long strip plate structure; both ends of the fixing plate are provided with screw holes for connecting with the flange of the flange plate.

6. The flange short pipe positioning device according to claim 1, characterized in that: The side wall of the support tube has a first positioning hole that penetrates through it, allowing a positioning element to pass through the first positioning hole to fix the central axis tube and the fixing plate in connection.

7. 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 with the head end of the laser pen mounting seat.

8. The flange short pipe positioning device according to claim 1, characterized in that: The side wall of the rear end portion of the laser pen mounting seat has a penetrating second positioning hole, allowing a positioning element to pass through the second positioning hole to fix the laser pen and the laser pen mounting seat in connection.

9. A flange short pipe positioning method, implemented based on the positioning device according to any one of claims 1 to 8, comprising: Put the flange short pipe with the positioning device installed into the opening of the furnace shell; The angle of the flange short tube can be located by turning on the laser pen and adjusting the angle of the flange short tube until the laser emitted by the laser pen irradiates the set position.

10. A flange short pipe positioning method, implemented based on the positioning device according to any one of claims 1 to 8, for positioning two opposite flange short pipes, comprising: Put the two flange short pipes with the positioning devices installed into the openings of the furnace shell; The laser pens of the two positioning devices are turned on in sequence, and the angles of the flange short tubes are adjusted so that the laser emitted by the other laser pen irradiates the central axis tube of the positioning device, thereby positioning the angles of the two flange short tubes.

11. The flange short pipe positioning method according to claim 10, characterized in that: The two flange short pipes with the positioning device installed are basically placed horizontally opposite to each other.

12. A flange short pipe positioning method, implemented based on the positioning device according to any one of claims 1 to 8, for positioning two opposite flange short pipes, comprising: Put 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 pen; The angles of the two flange short tubes can be located by turning on the laser pen of the positioning device on which the laser pen is installed and adjusting the angles of the flange short tubes so that the laser emitted by the laser pen passes through the central axis tube of the other positioning device.

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