Processing Method of Horizontal Cylindrical Barrel Opening Flange

Abstract

The present application discloses a processing method for the opening flange of a horizontal cylinder. The processing method includes the following steps: S1. Install the assembled flange and the nozzle on the horizontal cylinder; S2. Install a support system on the outer wall surface of the horizontal cylinder in S1 along its axial direction; S3. Install a gantry milling machine on the support system in S2, detect the installation accuracy of the gantry milling machine and adjust it to be qualified; S4. Use the gantry milling machine in S3 to process the flange. In this solution, since the support system is installed on the horizontal cylinder and then the gantry milling machine is installed on the support system, the flange can be processed on-site by the gantry milling machine, thus solving the problems of high construction cost and great implementation difficulty caused by installing lattice columns on the ground to support a large gantry milling machine for processing large flanges.

Description

Technical Field

[0001] This application relates to the technical field of wind tunnel test equipment, and particularly to a processing method for the opening flange of a horizontal cylinder body. Background Art

[0002] A wind tunnel is a pipe-like device used to generate artificial airflows. It has a pressure-bearing cylinder body on the outside and a pipe-shaped airflow channel on the inside. There are two structural forms for the test section of a certain large wind tunnel according to different specifications of the test models, which are installed in a horizontal cylinder body outside the wind tunnel. The top of the horizontal cylinder body has a large opening and is welded with a nozzle and a flange. Through a precision lifting device, the two structural forms of the test section can be hoisted into the wind tunnel from the large opening of the horizontal cylinder body for installation or hoisted out of the wind tunnel for replacement. During installation, the test section is connected to the opening flange of the horizontal cylinder body to seal the wind tunnel.

[0003] Since the specifications of the flange and the nozzle are usually large, it is almost impossible to machine the flange after it is connected to the horizontal cylinder body and then transported to the installation site. If it is welded to the nozzle, machined, and then welded to the horizontal cylinder body, the levelness of the flange cannot be guaranteed. Therefore, only the scheme of on-site machining after the flange is installed on the horizontal cylinder body can be considered. Due to the large diameter of the horizontal cylinder body, the existing large gantry milling machines have insufficient processing height, and only lattice columns can be used to support and raise the gantry milling machine. However, there are three technical problems: First, the support system is too long, and there are disturbances in the support columns during the machining process of the gantry milling machine, resulting in machining errors that cannot be eliminated; second, during the machining process, the ground vibration caused by external construction will also cause machining errors; third, the weight of the large gantry milling machine is more than one hundred tons, and the cost of building the support system is high. Summary of the Invention

[0004] In view of this, this application provides a processing method for the opening flange of a horizontal cylinder body, which can reduce the implementation difficulty and improve the machining accuracy.

[0005] This application provides a processing method for the opening flange of a horizontal cylinder body, including the following steps:

[0006] S1. Install the assembled flange and nozzle on the horizontal cylinder body;

[0007] S2. Install a support system along the axial direction on the outer wall surface of the horizontal cylinder body in S1;

[0008] S3. Install the gantry milling machine on the support system in S2, detect the installation accuracy of the gantry milling machine and adjust it to be qualified;

[0009] S4. Machine the flange using the gantry milling machine in S3.

[0010] Optionally, after S4, it includes:

[0011] S5. Demolish the gantry milling machine, install the enclosure structure on the support system along the perimeter of the flange, and install steps within the space enclosed by the enclosure structure to serve as the maintenance platform for the flange.

[0012] Optionally, the support system includes a panel, a web, and a stiffener assembly. The web is fixedly connected to the outer wall surface of the horizontal cylinder, the stiffener assembly is fixedly connected to the end surface of the web, and the panel is fixedly connected to the web and the stiffener assembly.

[0013] Optionally, the web is a triangular arc-shaped plate, the curvature of the inner arc surface of the web is consistent with the curvature of the outer wall surface of the horizontal cylinder, the included angle between the top surface of the web and the outer wall surface of the web is greater than 90°, the inner arc surface of the web fits with the outer wall surface of the horizontal cylinder, and the top surface of the web is parallel to the horizontal plane.

[0014] Optionally, the panel is formed by welding multiple steel plates together, and the panel is horizontally installed on the top surface of the web and welded to the web.

[0015] Optionally, the stiffener assembly is spliced by 3 longitudinal stiffeners and 2 transverse stiffeners.

[0016] Optionally, the gantry milling machine includes a bed, a carriage, a column, a crossbeam, and a ram. The bed is installed on the panel, the carriage is installed on the bed and longitudinally slides on the bed through a guide rail, the column is installed on the carriage and bolted to the carriage, the crossbeam is horizontally installed on the column and bolted to the column, the ram is installed on the crossbeam and horizontally moves on the crossbeam through a guide rail, and a cutter head is installed on the ram and can move up and down along the ram through a guide rail.

[0017] Optionally, the length of the bed is greater than the length of the flange, the distance between the columns is greater than the width of the flange, the length of the panel is greater than the length of the bed, the width of the panel is greater than the width of the bed, and the width of the panel is greater than the length of the top surface of the web in the transverse direction.

[0018] Optionally, use finite element analysis software to analyze and calculate the support system to determine the specifications of the web, the stiffener assembly, and the panel, ensuring that the maximum deformation of the support system during the machining of the flange does not exceed the flatness requirement of the flange.

[0019] Optionally, after the gantry milling machine is installed, set a laser target point on the cutter head, move the gantry milling machine in the longitudinal, transverse, and up-and-down directions, measure the coordinate values of the laser target point during the movement using a laser tracker, and adjust the installation accuracy of the gantry milling machine by analyzing the coordinate values of the laser target point.

[0020] Compared with the related art, the present application has the following beneficial effects:

[0021] (1) The present application adopts a method of installing a support system on a horizontal cylinder and then installing a gantry milling machine on the support system to process the flange on site, thereby solving the problem of high construction cost and implementation difficulty caused by installing lattice columns on the ground to support the gantry milling machine to process the flange.

[0022] (2) The present application sets up the support platform of the gantry milling machine on a horizontal cylinder so that the gantry milling machine and the flange to be processed remain in a relatively static state, thereby reducing the support height, reducing the impact of objective factors such as external construction on the processing process, and improving the processing accuracy.

[0023] (3) After the gantry milling machine is disassembled, the present application uses the support system as part of the flange maintenance platform, thereby avoiding the disassembly of the support system, saving resources, and reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the on-site installation structure of the horizontal cylinder, the connecting pipe and the flange provided in the embodiment of the present application;

[0026] Figure 2 It is a schematic diagram of the installation of the support system provided in the embodiment of the present application;

[0027] Figure 3 is a schematic diagram of the support system architecture provided by an embodiment of the present application;

[0028] Figure 4 It is a schematic diagram of on-site installation of a gantry milling machine provided in an embodiment of the present application;

[0029] Figure 5 It is a schematic diagram of the enclosure structure and step installation provided in the embodiment of the present application.

[0030] The components in the figure are marked as follows:

[0031] 1-horizontal cylinder; 2-pipe connection; 3-flange; 4-support system; 5-panel; 6-web; 7-rib plate assembly; 8-gantry milling machine; 9-bed; 10-slide; 11-column; 12-crossbeam; 13-ram; 14-enclosing structure; 15-step. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0033] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0034] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0036] Reference Figure 1 , the main body targeted by the solution of this embodiment, i.e., the horizontal cylinder 1, has a diameter of 14000 mm, the nozzle 2 has a specification of 12000×4500 mm, and the flange 3 has a specification of 14000×6600 mm.

[0037] The horizontal cylinder 1 is installed in place on site, the flange 3 and the nozzle 2 are assembled and welded, and then the welded flange 3 + nozzle 2 as a whole is installed on the horizontal cylinder 1 to complete the welding of the nozzle 2 and the horizontal cylinder 1.

[0038] ReferenceFigure 2 , two sets of support systems 4 are longitudinally installed on the outer wall surface of the horizontal cylinder 1, and the two sets of support systems 4 are distributed on both sides of the flange 3 and are symmetrically arranged about the longitudinal axis of the flange 3.

[0039] Reference Figure 2 、 Figure 3 , each set of support system 4 is composed of a panel 5, a web 6, and a rib plate assembly 7. The web 6 is a triangular arc-shaped web, and the curvature of the inner arc surface of the web 6 is the same as that of the outer wall surface of the horizontal cylinder 1. The included angle between the top surface of the web 6 and the outer wall surface of the web 6 is 98°. The webs 6 are arranged and installed at equal intervals along the longitudinal direction of the horizontal cylinder 1. When installed, the inner arc surface of the web 6 is in contact with the outer wall surface of the horizontal cylinder 1 and the top surface of the web 6 is parallel to the ground horizontal plane. The spacing of the webs 6 is 1380 mm and is welded to the horizontal cylinder 1. The panel 5 is formed by welding multiple steel plates and is horizontally installed on the top surface of the web 6 and welded to the web 6. The rib plate assembly 7 is composed of 3 longitudinal rib plates and 2 transverse stiffeners and is welded. Each set of rib plate assemblies 7 is installed between two adjacent webs 6 and is welded to the panel 5 and the web 6.

[0040] The finite element analysis software is used to analyze and calculate the support system 4 to determine the specifications of the web 6, the rib plate assembly 7, and the panel 8, so as to ensure that the maximum deformation of the support system 4 during the processing of the flange 3 does not exceed the flatness requirement of the flange.

[0041] Reference Figure 4 , the gantry milling machine 8 is installed on the support system 4. The gantry milling machine 8 includes a bed body 9, a slide base 10, a column 11, a cross beam 12, and a ram 13. There are 2 bed bodies 9, which are respectively installed on the panels 5 of the two sets of support systems 4. There are 2 slide bases 10, which are installed on the bed body 9 and can longitudinally slide on the bed body 9 through the guide rails. There are 2 columns 11, which are installed on the slide bases 10 and are bolted to the slide bases 10. The cross beam 12 is horizontally installed on the 2 columns 11 and is bolted to the columns 11. The ram 13 is installed on the cross beam 12 and can horizontally move on the cross beam 12 through the guide rails. A cutter head is installed on the ram 13 and can move up and down on the ram 13 through the guide rails.

[0042] Refer again to Figure 4 , the length of the bed body 9 is greater than the length of the flange 3, and the spacing between the columns 11 is greater than the width of the flange 3. The length of the panel 5 is greater than the length of the bed body 9, the width of the panel 5 is greater than the width of the bed body 9, and the width of the panel 5 is greater than the length of the top surface of the web 6 in the transverse direction. As an example of the above specifications, the length of the bed body 9 of the gantry milling machine 8 is 17350 mm, and the spacing between the columns 11 is 9250 mm. There are 14 webs 6 in each set of support systems 4, 13 sets of rib plate assemblies 7, and the specification of the panel 5 is 18150×1630 mm.

[0043] After the gantry milling machine 8 is installed, a laser target is set on the cutter head, and the gantry milling machine 8 is moved in the longitudinal, transverse, and vertical directions. During the movement, a laser tracker is used to measure the coordinate value of the laser target. By analyzing the coordinate value of the laser target, the installation accuracy of the gantry milling machine 8 is adjusted until it is qualified. The flange 3 is processed by the gantry milling machine 8 until the processing is completed, and the processing size of the flange 3 is tested. After the test is qualified, the gantry milling machine 8 is removed.

[0044] refer to Figure 5 A protective structure 14 is installed on the support system 4 panel along the four sides of the flange 3 , and the protective structure 14 and steps 15 are installed on the horizontal cylinder 1 to serve as an inspection platform for the flange 3 .

[0045] It should be emphasized that this application has made the following technical contributions to the relevant technologies:

[0046] (1) A method of installing a support system on a horizontal cylinder and then installing a gantry milling machine on the support system to process the flange on site was adopted, which solved the problem of high construction cost and implementation difficulty caused by installing lattice columns on the ground to support the gantry milling machine to process the flange.

[0047] (2) A processing method is adopted in which the support platform of the gantry milling machine is set on a horizontal cylinder so that the gantry milling machine and the flange to be processed remain in a relatively static state. This solves the problem of the existing method that the support system is too long, there is disturbance during the processing, or external construction and other objective factors cause the ground to vibrate and cause processing errors, thereby improving the processing accuracy.

[0048] (3) A method of transforming the support system into a maintenance platform is adopted to solve the problem of one-time use of the support system in the existing method, which leads to waste of resources and high construction costs.

[0049] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A processing method for a horizontal cylindrical body opening flange, characterized in that, It includes the following steps: S1. Install the assembled flange and nozzle on the horizontal cylinder body; S2. Install a support system along the axial direction on the outer wall surface of the horizontal cylinder body in S1; the support system includes a panel, a web plate, and a rib plate assembly. The web plate is fixedly connected to the outer wall surface of the horizontal cylinder body, the rib plate assembly is fixedly connected to the end surface of the web plate, and the panel is fixedly connected to the web plate and the rib plate assembly. Use finite element analysis software to analyze and calculate the support system to determine the specifications of the web plate, rib plate assembly, and panel, ensuring that the maximum deformation of the support system during the flange processing does not exceed the flatness requirement of the flange; S3. Install the gantry milling machine on the support system in S2, detect the installation accuracy of the gantry milling machine and adjust it to be qualified. After the gantry milling machine is installed, set a laser target point on the tool head, move the gantry milling machine longitudinally, transversely, and vertically. During the movement, use a laser tracker to measure the coordinate values of the laser target point, and adjust the installation accuracy of the gantry milling machine by analyzing the coordinate values of the laser target point; S4. Machine the flange using the gantry milling machine in S3; After S4, it includes: S5. Remove the gantry milling machine, install an enclosure structure on the support system along the perimeter of the flange, and install steps in the space enclosed by the enclosure structure to serve as a maintenance platform for the flange.

2. The processing method according to claim 1, characterized in that, The web plate is a triangular arc-shaped plate, the curvature of the inner arc surface of the web plate is the same as that of the outer wall surface of the horizontal cylinder body, the included angle between the top surface of the web plate and the outer wall surface of the web plate is greater than 90°, and the inner arc surface of the web plate fits the outer wall surface of the horizontal cylinder body and the top surface of the web plate is parallel to the horizontal plane.

3. The processing method according to claim 1, wherein The panel is formed by welding multiple steel plates together, and the panel is horizontally installed on the top surface of the web plate and welded to the web plate.

4. The processing method according to claim 1, characterized in that, The rib plate assembly is spliced by 3 longitudinal rib plates and 2 transverse stiffeners.

5. The processing method according to claim 1, wherein The gantry milling machine includes a bed body, a carriage, a column, a crossbeam, and a ram. The bed body is installed on the panel. The carriage is installed on the bed body and longitudinally slides on the bed body through a guide rail. The column is installed on the carriage and bolted to the carriage. The crossbeam is horizontally installed on the column and bolted to the column. The ram is installed on the crossbeam and transversely moves on the crossbeam through a guide rail. A tool head is installed on the ram and can move up and down along the ram through a guide rail.

6. The processing method according to claim 5, characterized in that, The length of the bed body is greater than the length of the flange, the distance between the columns is greater than the width of the flange, the length of the panel is greater than the length of the bed body, the width of the panel is greater than the width of the bed body, and the width of the panel is greater than the transverse length of the top surface of the web plate.

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