Installation method of stainless steel wind tunnel large-opening-angle section

Abstract

The invention provides an installation method for a stainless steel wind tunnel large-opening-angle section. The installation method comprises the steps that a first inner support, a second inner support, a first positioning seat and a second positioning seat are fixed in a first plenum chamber section; the large end of the large-opening-angle section faces downwards to be placed on the platform, and the first plenum chamber section is hoisted to be sleeved with the large-opening-angle section; a detachable first connecting support, a detachable second connecting support, a detachable first positioning support and a detachable second positioning support are respectively mounted between the first inner support, the second inner support, the first positioning seat and the large-opening-angle section and between the second positioning seat and the large-opening-angle section; integrally hoisting the first plenum chamber section and the large-open-angle section to the upper position, horizontally mounting, and welding the first plenum chamber section and the second plenum chamber section; synchronously and repeatedly moving the large-opening-angle section, the first inner support, the second inner support, the first positioning seat and the second positioning seat to theoretical positions of the plenum chamber section, and mounting the first sliding support, the second sliding support, the first moving support and the second moving support. The method solves the problem that the large-opening-angle section of the wind tunnel is difficult to install, and the construction efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of wind tunnels, and in particular to a method for installing a large-open-angle section of a stainless steel wind tunnel. Background Art

[0002] Since the advent of wind tunnels, the application of wind tunnel technology in aerodynamic research and aircraft development has made significant progress, and its role has become increasingly significant. However, as the test objects (such as aircraft) become larger and larger, conventional wind tunnel tests face some severe challenges, the most important of which is that conventional wind tunnels cannot conduct tests within the full-scale Reynolds number. High Reynolds number wind tunnel tests are the premise and guarantee for the precise design of aircraft aerodynamics and accurate prediction of flight performance. Stainless steel wind tunnels were born and developed to solve this problem.

[0003] The expansion angle of the large-opening section of a conventional carbon steel wind tunnel is usually designed to be 30 to 90 degrees. The structure is a conical single-layer shell, which is welded to the outlet cylinder of the fourth corner section upstream and flange-connected or welded to the stable section downstream. It is hoisted into position as a whole by lifting equipment during installation. Stainless steel wind tunnels have large shrinkage movements under low-temperature and deep-cold conditions, so they are designed as a double-layer shell structure: the large-opening section is a hyperbolic shell in structure, and a mounting base is designed along the axis of the shell; an insulation device is installed on the inner wall of the stationary section to ensure the stability of the outer shell of the wind tunnel, and an inner support is welded along the axis of the shell; the mounting base of the large-opening section is installed on the support in the stationary chamber through a sliding support, and movement and contraction can be achieved through the sliding support at low temperatures.

[0004] Figure 1 The present invention is a structural schematic diagram of a stainless steel wind tunnel with a large open angle section installed in a stationary chamber. When the stainless steel wind tunnel with a large open angle section 3 is installed, if the existing technology is used to hoist the entire section 3 into position, the first stationary chamber section 1 of the outer shell cannot be installed; since the stainless steel wind tunnel with a large open angle section 3 is a hyperbolic shell, the first stationary chamber section 1 for installing the large open angle section 3 is a conical cylinder, and it is difficult to implement the existing push-and-slide technology; the first stationary chamber section 1 and the second stationary chamber section 2 are designed with a first inner support 4 and a first positioning seat 7 at the closing weld, and installing the first inner support 4 and the first positioning seat 7 after the closing weld is welded is labor-intensive and difficult; after the large open angle section 3 and the first stationary chamber section 1 are installed, due to the small space, it is difficult to implement the on-site assembly of the first stationary chamber section 1 and the second stationary chamber section 2.

[0005] Therefore, it is necessary to develop an installation method for a stainless steel wind tunnel with a large opening angle section to solve the above-mentioned problems. Summary of the invention

[0006] The present application provides a method for installing a stainless steel wind tunnel large-angle section, aiming to solve the problem of difficulty in installing the existing stainless steel wind tunnel large-angle section.

[0007] The technical solution of this application is:

[0008] A method for installing a stainless steel wind tunnel large-opening-angle section comprises the following steps:

[0009] S1, temporarily fixing two first inner supports, two second inner supports, two first positioning seats, and two second positioning seats at intervals on the inner circumferential wall of the first stationary chamber segment;

[0010] S2, placing the manufactured large open angle segment with the large end facing downward on the platform, hoisting the first stationary chamber segment and fitting it on the outer peripheral wall of the large open angle segment;

[0011] S3, installing a detachable first connecting support between the first inner support and the first mounting base plate on the wide open angle section, and installing a detachable second connecting support between the second inner support and the second mounting base plate on the wide open angle section; installing a detachable first positioning support between the first positioning seat and the first connecting base plate on the wide open angle section, and installing a detachable second positioning support between the second positioning seat and the second connecting base plate on the wide open angle section;

[0012] S4, hoisting the first resident chamber segment and the large open angle segment connected to each other as a whole and installing them horizontally, completing welding between the first resident chamber segment and the second resident chamber segment;

[0013] S5, respectively removing the first positioning support and the second positioning support located on the upper part of the wide open angle section, and moving the wide open angle section toward the downstream direction of the wind tunnel, so that the second inner support is moved to the theoretical position on the first chamber section and welded, and moving the first inner support to the theoretical position on the first chamber section and welding, so that the wide open angle section is moved toward the downstream direction of the wind tunnel to the theoretical position;

[0014] S6, respectively remove the first positioning support and the second positioning support located at the lower part of the large open angle section, move the first positioning support and the second positioning support to the theoretical position of the first chamber segment and weld them, adjust the elevation and axis of the large open angle section to the qualified position, install the first sliding support between the first positioning support and the large open angle section, and the second sliding support between the second positioning support and the large open angle section; remove the first connecting support and the second connecting support on the two opposite inner walls of the large open angle section in turn, and simultaneously install the first movable support between the first inner support and the large open angle section, and the second movable support between the second inner support and the large open angle section.

[0015] As a technical solution of the present application, in step S1, one of the first inner supports, one of the first positioning seats, another of the first inner supports and another of the first positioning seats are arranged at intervals on the first inner circumferential surface of the first chamber segment, and one of the second inner supports, one of the second positioning seats, another of the second inner supports and another of the second positioning seats are arranged at intervals on the second inner circumferential surface of the first chamber segment; the corresponding first inner supports and the second inner supports are arranged at intervals along the extension direction of the first chamber segment, and the corresponding first positioning seats and the second positioning seats are arranged at intervals along the extension direction of the first chamber segment.

[0016] As a technical solution of the present application, the first inner support and the second inner support each include two support plates, a plurality of connecting plates, a reinforcement plate and a mounting plate; the two support plates are installed on the inner wall of the first chamber segment in parallel and at intervals; the plurality of connecting plates are arranged at intervals, and the opposite sides are respectively connected between the two support plates; the mounting plate is installed on the top ends of the two support plates; the reinforcement plate is connected between the mounting plate and the connecting plate located at the upper part.

[0017] As a technical solution of the present application, the first positioning seat and the second positioning seat each include an intermediate plate, two first wing plates, two second wing plates and a positioning plate; the intermediate plate, the first wing plate and the second wing plate are all installed on the inner wall of the first chamber segment, and one side of the two first wing plates are respectively connected to the opposite sides of the intermediate plate, one side of the two second wing plates are respectively connected to the opposite sides of the intermediate plate, and the first wing plate is parallel to the second wing plate; the positioning plate is installed on the top of the intermediate plate, the first wing plate and the second wing plate.

[0018] As a technical solution of the present application, in step S2, after the first chamber segment is welded, a plurality of stainless steel blocks are welded to the inner wall of the first chamber segment, and the first inner support, the second inner support, the first positioning seat, and the second positioning seat are respectively welded to the corresponding stainless steel blocks.

[0019] As a technical solution of the present application, when the first inner support, the second inner support, the first positioning seat, and the second positioning seat are temporarily fixed in the first chamber segment, the distance between the first inner support, the second inner support, the first positioning seat, the second positioning seat and the end face of the large end of the first chamber segment is greater than the set theoretical distance.

[0020] As a technical solution of the present application, in step S3, after the first chamber segment is fitted with the large open angle segment, the large open angle segment is driven to rise and fall relative to the first chamber segment by a hydraulic jack, so that the mounting surface of the first inner support corresponds to the first mounting base plate, the mounting surface of the second inner support corresponds to the second mounting base plate, the mounting surface of the first positioning seat corresponds to the first connecting base plate, and the mounting surface of the second positioning seat corresponds to the second connecting base plate.

[0021] As a technical solution of the present application, the first connecting support and the second connecting support are both steel structure piers with the same structure but different sizes, and the first positioning support and the second positioning support are both steel structure piers with the same structure but different sizes.

[0022] As a technical solution of the present application, a polytetrafluoroethylene plate is detachably mounted on the mounting surface of the first inner support, and the first connecting support is detachably arranged on the polytetrafluoroethylene plate, so that when the large open angle section is moved, the large open angle section slides on the polytetrafluoroethylene plate through the first connecting support; a polytetrafluoroethylene plate is detachably mounted on the mounting surface of the second inner support, and the second connecting support is detachably arranged on the polytetrafluoroethylene plate, so that when the large open angle section is moved, the large open angle section slides on the polytetrafluoroethylene plate through the second connecting support; a polytetrafluoroethylene plate is detachably mounted on the mounting surface of the first positioning seat, and the first positioning support is detachably arranged on the polytetrafluoroethylene plate, so that when the large open angle section is moved, the large open angle section slides on the polytetrafluoroethylene plate through the first positioning support; a polytetrafluoroethylene plate is detachably mounted on the mounting surface of the second positioning seat, and the second positioning support is detachably arranged on the polytetrafluoroethylene plate, so that when the large open angle section is moved, the large open angle section slides on the polytetrafluoroethylene plate through the second positioning support.

[0023] Beneficial effects of this application:

[0024] The present application provides a method for installing a large open angle section of a stainless steel wind tunnel, which fits the large open angle section and the station chamber together, and uses the first connecting support, the second connecting support, the first positioning support and the second positioning support to fix the large open angle section on the corresponding first inner support, the second inner support, the first positioning seat and the second positioning seat of the station chamber, and then hoist the whole section into position, which solves the problem that the existing technology cannot install the large open angle section of the stainless steel wind tunnel. At the same time, the method temporarily fixes each first inner support, the second inner support, the first positioning seat and the second positioning seat at the upstream position of the wind tunnel and fixes the large open angle section. After the welding of the closing welds between the station chamber sections is completed, each first inner support, the second inner support, the first positioning seat, the second positioning seat and the large open angle section are adjusted to move downstream of the wind tunnel, which solves the problem that the internal support is difficult to install and the closing weld assembly is difficult to implement in the existing technology, and also improves the construction efficiency and ensures the welding quality. In addition, the method utilizes the first inner support, the second inner support, the first positioning support, the second positioning support, the first connecting support, the second connecting support, the first positioning support and the second positioning support to bolt the large open angle section in the stationary chamber, and utilizes the first connecting support, the second connecting support, the first positioning support and the second positioning support to achieve sliding and position adjustment of the large open angle section in the stationary chamber, solving the problem in the prior art that the double-layer shell is fitted together and welded and fixed with tooling supports, which makes it impossible to effectively achieve sliding and contaminates the double-layer shell when the tooling supports are removed, reducing construction difficulty and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a stainless steel wind tunnel with a large opening angle section provided in an embodiment of the present application installed in a stationary room;

[0027] Figure 2 A schematic diagram of temporary fixing of the first inner support, the second inner support, the first positioning seat, and the second positioning seat provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of a first process of fitting the first resident chamber segment and the large open angle segment provided in an embodiment of the present application;

[0029] Figure 4 A partial schematic diagram of the second process of fitting the first stationary chamber segment and the large open angle segment provided in an embodiment of the present application;

[0030] Figure 5A schematic diagram of the installation of the first connecting support and the first positioning support provided in the embodiment of the present application;

[0031] Figure 6 A schematic diagram of a first connecting support provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of a first positioning support provided in an embodiment of the present application;

[0033] Figure 8 A schematic diagram of a first movable support provided in an embodiment of the present application;

[0034] Fig. 9 A schematic diagram of a first sliding support provided in an embodiment of the present application;

[0035] Fig.10 A schematic diagram of a first inner support provided in an embodiment of the present application;

[0036] Fig.11 A schematic diagram of a first positioning seat provided in an embodiment of the present application;

[0037] Fig.12 A schematic diagram of the first process of installing a large open angle section provided in an embodiment of the present application;

[0038] Fig.13 A schematic diagram of the second process of installing a large open angle section provided in an embodiment of the present application;

[0039] Fig.14 A schematic diagram of the third process of installing a large open angle section provided in an embodiment of the present application;

[0040] Fig.15 A schematic diagram of the fourth process of installing a large open angle section provided in an embodiment of the present application;

[0041] Fig.16 A schematic diagram of the fifth process of installing a large open-angle section provided in an embodiment of the present application.

[0042] Icons: 1-first chamber section; 2-second chamber section; 3-large open angle section; 4-first inner support; 5-second inner support; 6-first sliding support; 7-first positioning seat; 8-second positioning seat; 9-first mounting base plate; 10-first connecting support; 11-polytetrafluoroethylene plate; 12-second mounting base plate; 13-second connecting support; 14-first connecting base plate; 15-first positioning support; 16-second connecting base plate; 17-second positioning support; 18-second sliding support; 19-first movable support; 20-second movable support; 21-support plate; 22-connecting plate; 23-reinforcement plate; 24-mounting plate; 25-middle plate; 26-first wing plate; 27-second wing plate; 28-positioning plate. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is usually placed when in use. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] In addition, in the present application, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0049] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] Example:

[0051] Please refer to Figure 1 , with reference Figures 2 to 16 In this embodiment, a method for installing a stainless steel wind tunnel with a large opening angle section is provided, which is aimed at a main body such as Figure 1 As shown: the first chamber segment 1 is a conical cylinder, the second chamber segment 2 is a straight cylinder, the first chamber segment 1 and the second chamber segment 2 are welded, wherein most of the large open angle segment 3 is located in the first chamber segment 1, and the outlet part of the large open angle segment 3 is located in the second chamber segment 2. Two first inner supports 4 and two first positioning seats 7 are located at the welding positions of the first chamber segment 1 and the second chamber segment 2, and two second inner supports 5 and two second positioning seats 8 are close to the entrance end face of the first chamber segment 1, wherein one of the first inner supports 4, one of the first positioning seats 7, another first inner support 4 and another first positioning seat 7 are all arranged at intervals on the first inner circumferential surface of the first chamber segment 1, and one of the second inner supports 5, one of the second positioning seats 8, another second inner support 5 and another second positioning seat 8 are all arranged at intervals on the second inner circumferential surface of the first chamber segment 1, and the corresponding first inner supports 4 and second inner supports 5 are arranged at intervals along the extension direction of the first chamber segment 1, and the corresponding first positioning seats 7 and second positioning seats 8 are arranged at intervals along the extension direction of the first chamber segment 1. Two circles of the first mounting base plate 9, the second mounting base plate 12, the first connecting base plate 14 and the second connecting base plate 16 are arranged at intervals on the large open angle section 3. Each circle of the first mounting base plate 9, the second mounting base plate 12, the first connecting base plate 14 and the second connecting base plate 16 are arranged at intervals along the inner circumference of the large open angle section 3. The large open angle section 3 is installed on the mounting surface of the inner support corresponding to the stationary chamber by installing the first movable support 19 on the first mounting base plate 9, the second movable support 20 on the second mounting base plate 12, the first sliding support 6 on the first connecting base plate 14, and the second sliding support 18 on the second connecting base plate 16.

[0052] The first chamber segment 1 is assembled and welded vertically with the end face with the larger diameter facing downwards. After welding, a certain number of stainless steel blocks are welded to the inner wall of the first chamber segment 1, and the first inner support 4, the second inner support 5, the first positioning seat 7, and the second positioning seat 8 are welded to the stainless steel blocks. Figure 2 As shown, at this time, the distances between the first inner support 4, the second inner support 5, the first positioning seat 7, the second positioning seat 8 and the end surface with a larger diameter of the first chamber segment 1 are greater than the theoretical distance.

[0053] Since the main material of the stainless steel wind tunnel is austenitic stainless steel, in order to avoid iron ion contamination, stainless steel blocks are used as the material for temporarily fixing the first inner support 4, the second inner support 5, the first positioning seat 7, and the second positioning seat 8. By moving the first inner support 4, the second inner support 5, the first positioning seat 7, and the second positioning seat 8 as a whole to the upstream position of the wind tunnel and temporarily fixing them, it is possible to avoid the obstruction of the first inner support 4 and the second positioning seat 8 when the first station chamber segment 1 and the second station chamber segment 2 are assembled, and the first inner support 4, the second inner support 5, the first positioning seat 7, and the second positioning seat 8 can be temporarily fixed on the station chamber for overall hoisting to avoid difficulties in later installation.

[0054] like Figure 3 and Figure 4 As shown, the finished wide open angle section 3 is placed vertically on the platform with the end face with a larger diameter facing downward, and the first stationary chamber section 1 temporarily fixed with the first inner support 4, the second inner support 5, the first positioning seat 7, and the second positioning seat 8 is vertically lifted and moved to the top of the wide open angle section 3 and slowly lowered to complete the fitting with the wide open angle section 3. A hydraulic jack is arranged between the wide open angle section 3 and the platform. After the first stationary chamber section 1 is lowered on the platform, the height of the wide open angle section 3 is adjusted by the hydraulic jack so that the mounting surfaces of the first inner support 4, the second inner support 5, the first positioning seat 7, and the second positioning seat 8 correspond one by one to the first mounting bottom plate 9, the second mounting bottom plate 12, the first connecting bottom plate 14, and the second connecting bottom plate 16 on the wide open angle section 3.

[0055] Since the first station chamber segment 1 is a conical cylinder and the wide open angle segment 3 is a hyperbolic shell, after the first station chamber segment 1 and the wide open angle segment 3 are fitted together with the end faces with larger diameters facing downwards, the first station chamber segment 1 and the wide open angle segment 3 can be hoisted and installed at the same time by hoisting the first station chamber segment 1, thereby avoiding the need to hoist the first station chamber segment 1 and the wide open angle segment 3 separately, and also avoiding the hoisting deformation caused by the poor rigidity of the wide open angle segment 3 when hoisting the wide open angle segment 3 separately. After the first installation base plate 9, the second installation base plate 12, the first connecting base plate 14 and the second connecting base plate 16 of the wide open angle segment 3 are matched one by one with the installation surfaces of the first inner support 4, the second inner support 5, the first positioning seat 7 and the second positioning seat 8, the position of the wide open angle segment 3 in the first station chamber segment 1 is moved upstream of the wind tunnel compared with the theoretical position, thereby avoiding the obstruction of the wide open angle segment 3 when the first station chamber segment 1 and the second station chamber segment 2 are assembled in the later stage.

[0056] It should be noted that the two first inner supports 4 are arranged symmetrically with respect to the large open angle section 3, the two second inner supports 5 are arranged symmetrically with respect to the large open angle section 3, the two first positioning seats 7 are arranged symmetrically with respect to the large open angle section 3, and the two second positioning seats 8 are arranged symmetrically with respect to the large open angle section 3. In addition, the first inner support 4 and the second inner support 5 have the same structure, both of which include two support plates 21, a plurality of connecting plates 22, a reinforcement plate 23 and a mounting plate 24; the two support plates 21 are installed on the inner wall of the first stationary chamber segment 1 in parallel and at intervals; the plurality of connecting plates 22 are arranged at intervals, and the two opposite sides are respectively connected between the two support plates 21; the mounting plate 24 is installed on the top of the two support plates 21; the reinforcement plate 23 is connected between the mounting plate 24 and the connecting plate 22 located at the upper part. At the same time, the first positioning seat 7 and the second positioning seat 8 have the same structure, and both include an intermediate plate 25, two first wing plates 26, two second wing plates 27 and a positioning plate 28; the intermediate plate 25, the first wing plate 26 and the second wing plate 27 are all installed on the inner wall of the first chamber segment 1, and one side of the two first wing plates 26 are respectively connected to the opposite sides of the intermediate plate 25, and one side of the two second wing plates 27 are respectively connected to the opposite sides of the intermediate plate 25, and the first wing plate 26 is parallel to the second wing plate 27; the positioning plate 28 is installed on the top of the intermediate plate 25, the first wing plate 26 and the second wing plate 27.

[0057] like Figure 5As shown, the first connecting support 10 is installed between the mounting plate 24 of the first inner support 4 and the first mounting bottom plate 9 of the wide open angle section 3, and is fastened with bolts; the second connecting support 13 is installed between the mounting plate 24 of the second inner support 5 and the second mounting bottom plate 12 of the wide open angle section 3, and is fastened with bolts; the first positioning support 15 is installed between the positioning plate 28 of the first positioning seat 7 and the first connecting bottom plate 14 of the wide open angle section 3, and is fastened with bolts; the second positioning support 17 is installed between the positioning plate 28 of the second positioning seat 8 and the second connecting bottom plate 16 of the wide open angle section 3, and is fastened with bolts. The first station chamber segment 1 and the wide open angle segment 3 connected together are hoisted as a whole, installed horizontally, and the welding between the first station chamber segment 1 and the second station chamber segment 2 is completed.

[0058] Please refer to Figure 1 , since the first inner support 4 and the first movable support 19 are finally installed and formed by bolt connection, the second inner support 5 and the second movable support 20 are bolted, the first positioning seat 7 and the first sliding support 6 are bolted, and the second positioning seat 8 and the second sliding support 18 are bolted, bolt holes are designed on the mounting surfaces of the first inner support 4, the second inner support 5, the first positioning seat 7 and the second positioning seat 8, and the corresponding first mounting base plate 9 and the first movable support 19 are also bolted, the second mounting base plate 12 and the second movable support 20 are bolted, the first connecting base plate 14 and the first sliding support 6 are bolted, and the second connecting base plate 16 and the second sliding support 18 are bolted, so bolt holes are also designed on the first mounting base plate 9, the second mounting base plate 12, the first connecting base plate 14 and the second connecting base plate 16. Therefore, please refer to Figure 5 , Figure 6 as well as Figure 7 The first connection support 10 and the second connection support 13 are both steel structure piers, and the size of the first connection support 10 is larger than that of the second connection support 13. Both of them include a first top plate, a first bottom plate, a first support plate and a plurality of first receiving plates. The first top plate and the first bottom plate are arranged in parallel and spaced apart. A plurality of bolt holes are provided on the first bottom plate and the first top plate. The first bottom plate is detachably mounted on the mounting plate 24 on the first inner support 4 or the mounting plate 24 on the second inner support 5 by a plurality of bolts. The first top plate is detachably mounted on the corresponding first mounting bottom plate 9 or the second mounting bottom plate 12 of the wide open angle section 3 by a plurality of bolts. Therefore, the bolt connection and fixation between the wide open angle section 3 and the first station chamber segment 1 can be realized by a plurality of bolts, without the need for tooling support welding connection, thereby avoiding the pollution of the stainless steel wind tunnel when the tooling support is removed by carbon arc gouging in the later stage. Therefore, after the first station chamber segment 1 and the second station chamber segment 2 are welded, the position of the wide open angle section 3 can be adjusted to the theoretical installation position.

[0059] like Figure 12-16 As shown, the first positioning support 15 and the second positioning support 17 located on the upper part of the large open angle section 3 are removed respectively to reduce the constraints of the large open angle section 3 and facilitate the later movement; the bolts between the first inner support 4 and the first connecting support 10 and the bolts between the second inner support 5 and the second connecting support 13 located on the left and right sides of the large open angle section 3 are loosened, and the bolts between the first positioning seat 7 and the first positioning support 15 and the bolts between the second positioning seat 8 and the second positioning support 17 located at the lower part of the large open angle section 3 are loosened; the large open angle section 3 is moved a distance downstream of the wind tunnel using tools such as a fall chain, and the moving distance must not exceed half of the length of the mounting surface of the first inner support 4 or the second inner support 5 (the lengths of the mounting surfaces of the first inner support 4 and the second inner support 5 are the same) to prevent the large open angle section 3 from tipping over. Remove the stainless steel block on the second inner support 5, use the fall chain to move the second inner support 5 to the theoretical position of the first station chamber segment 1 and complete the welding, then remove the stainless steel block on the first inner support 4, use the fall chain to move the first inner support 4 to the theoretical position of the first station chamber segment 1 and complete the welding. By moving the second inner support 5 and the first inner support 4 one by one, the stability of the large open angle segment 3 can be maintained. Finally, move the large open angle segment 3 to the theoretical position in the downstream direction of the wind tunnel.

[0060] If the wide open angle section 3 moves a long distance, in order to maintain the stability of the wide open angle section 3, the wide open angle section 3 and the corresponding first inner support 4 and second inner support 5 can be repeatedly moved multiple times. Specifically, the wide open angle section 3 is first moved a distance downstream of the wind tunnel, the second inner support 5 is moved parallel to the downstream direction of the wind tunnel for a distance and temporarily fixed, and then the first inner support 4 is moved parallel to the downstream direction of the wind tunnel for a distance and temporarily fixed, the wide open angle section 3 is moved again a distance downstream of the wind tunnel, the second inner support 5 is moved to the theoretical position of the first station chamber segment 1 and welded, the first inner support 4 is moved to the theoretical position of the first station chamber segment 1 and welded, and finally the wide open angle section 3 is moved to the theoretical position in the downstream direction of the wind tunnel.

[0061] Furthermore, in order to reduce the movement resistance of the large open angle section 3 on the first inner support 4, the second inner support 5, the first positioning seat 7, and the second positioning seat 8, a polytetrafluoroethylene plate 11 is provided on the mounting surfaces of the first inner support 4, the second inner support 5, the first positioning seat 7, and the second positioning seat 8; wherein the polytetrafluoroethylene plate 11 is provided with countersunk holes corresponding to the mounting surfaces of the mounting plates 24 of the first inner support 4, the polytetrafluoroethylene plate 11 is connected to the mounting plates 24 of the first inner support 4 by bolts, and the polytetrafluoroethylene plate 11 is provided with countersunk holes corresponding to the mounting surfaces of the mounting plates 24 of the second inner support 5 The mounting surface of the mounting plate 24 has corresponding countersunk holes, and the polytetrafluoroethylene plate 11 is connected to the mounting plate 24 of the second inner support 5 by bolts; in addition, the polytetrafluoroethylene plate 11 is provided with countersunk holes corresponding to the mounting surface of the positioning plate 28 of the first positioning seat 7, and the polytetrafluoroethylene plate 11 is connected to the positioning plate 28 of the first positioning seat 7 by bolts. At the same time, the polytetrafluoroethylene plate 11 is provided with countersunk holes corresponding to the mounting surface of the positioning plate 28 of the second positioning seat 8, and the polytetrafluoroethylene plate 11 is connected to the positioning plate 28 of the second positioning seat 8 by bolts. Furthermore, when the large open angle section 3 moves, it is actually through the first connecting support 10, the second connecting support 13, the first positioning support 15, and the second positioning support 17 sliding on the corresponding polytetrafluoroethylene plate 11 respectively, thereby driving the large open angle section 3 to move.

[0062] The first positioning support 15 and the second positioning support 17 located at the lower part of the large open angle section 3 are removed respectively. At this time, the large open angle section 3 is fixed by the first inner support 4 and the second inner support 5. The stainless steel blocks on the first positioning support 7 and the second positioning support 8 are removed respectively, and the first positioning support 7 and the second positioning support 8 are moved to the theoretical position of the first station chamber segment 1 by using the fall chain and completed welding. After the elevation and axis of the large open angle section 3 are adjusted by using the first inner support 4 and the second inner support 5 to meet the requirements, the first sliding support 6 between the first positioning support 7 and the large open angle section 3 and the second sliding support 18 between the second positioning support 8 and the large open angle section 3 are installed. First, the second connecting support 13 on one of the second inner supports 5 is removed and the corresponding second movable support 20 is installed, then the second connecting support 13 on another second inner support 5 is removed and the corresponding second movable support 20 is installed, then the first connecting support 10 on one of the first inner supports 4 is removed and the corresponding first movable support 19 is installed, and finally the first connecting support 10 on another first inner support 4 is removed and the corresponding first movable support 19 is installed. By removing and installing one by one, the stability of the large open angle section 3 can be maintained.

[0063] It should be noted that the first movable support 19 and the second movable support 20 have the same structure, and both include a connecting head, a connecting rod and a support block; wherein, one end of the connecting rod is detachably connected to the first mounting base plate 9 or the second mounting base plate 12 of the large open angle section 3 by bolts, and the other end is hinged to the connecting head, and the connecting head is installed on the support block by multiple bolts; the support block can be slidably placed on the mounting plate 24 of the first inner support 4 or the second inner support 5, thereby realizing the function of supporting and limiting the large open angle section 3. In addition, the first sliding support 6 and the second sliding support 18 have the same structure, both of which include two sliding seats, a limit seat, two connecting heads and two connecting rods; wherein the two sliding seats are symmetrically installed on the surface of the first connecting base plate 14 or the second connecting base plate 16 of the large open angle section 3 by multiple bolts; the limit seat is installed on the positioning plate 28 of the first positioning seat 7 or the second positioning seat 8 by multiple bolts, and it is located between the two sliding seats; one end of one of the connecting rods is connected to one of the sliding seats by bolts, and the other end is hinged to one of the connecting heads, and the connecting head can be slidably placed on one of the side surfaces of the limit seat; one end of the other connecting rod is connected to the other sliding seat by bolts, and the other end is hinged to the other connecting head, and the connecting head can be slidably placed on the other side surface of the limit seat; therefore, the first sliding support 6 and the second sliding support 18 can realize the function of limiting the large open angle section 3.

[0064] By utilizing the first inner support 4, the second inner support 5, the first positioning seat 7, the second positioning seat 8 of the stainless steel wind tunnel chamber's own structure, and designing the first connecting support 10, the second connecting support 13, the first positioning support 15 and the second positioning support 17, and moving the large open-angle section 3 and the first inner support 4, the second inner support 5 multiple times, the movement and adjustment of the large open-angle section 3 in the chamber can be achieved, thereby ensuring the installation elevation and axis of the large open-angle section 3, ensuring the installation quality, and solving the problem of the difficulty in installing the double-layer conical cylinder and hyperbolic shell of the stainless steel wind tunnel.

[0065] In summary, the present application provides a method for installing a large open-angle section of a stainless steel wind tunnel, which nests the large open-angle section 3 and the stationary chamber, and uses the first connecting support 10, the second connecting support 13, the first positioning support 15 and the second positioning support 17 to fix the large open-angle section 3 on the support inside the stationary chamber, and then hoist the entire section into position, thereby solving the problem that the large open-angle section of a stainless steel wind tunnel cannot be installed in the prior art; at the same time, the present method temporarily fixes the first inner support 4, the second inner support 5, the first positioning seat 7, and the second positioning seat 8 at the upstream position of the wind tunnel and fixes the large open-angle section 3, and after the welding of the closing welds between the stationary chamber sections is completed, the first inner support 4, the second inner support 5, the first positioning seat 7, the second positioning seat 8 and the large open-angle section 3 are adjusted to move downstream of the wind tunnel, thereby solving the problem that the inner supports are difficult to install and the closing welds are difficult to implement in the prior art, thereby improving the construction efficiency and ensuring the welding quality. In addition, the present method uses an inner support, a positioning support, a connecting support, and a positioning support to connect the large open angle section 3 in the station room by bolts, and uses the connecting support and the positioning support to achieve the sliding and position adjustment of the large open angle section 3 in the station room, which solves the problem that the double-layer shell is not effectively slipped when the tooling support is used for welding and fixing when the double-layer shell is fitted in the prior art, and the double-layer shell is polluted when the tooling support is removed, which reduces the construction difficulty and saves costs. In addition, the present application also adopts a process of temporarily fixing the double-layer curved shell after fitting and then hoisting the whole, which solves the problem that the existing technology cannot effectively install the large open angle section 3 of the stainless steel wind tunnel. Furthermore, it adopts a process of installing the inner parts forward and then adjusting them backward, which solves the problem that the outer shell assembly and welding are difficult to implement during the installation of the double-layer shell due to the obstacles of the inner shell. At the same time, it designs a connection device for adjusting the position and precision of the double-layer shell according to the structural characteristics of the stainless steel wind tunnel, which solves the problem that the welding fixation of the double-layer shell cannot effectively achieve sliding when the double-layer shell is fitted in the prior art, and the stainless steel shell is polluted when the tooling support is removed.

[0066] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for installing a stainless steel wind tunnel with a large opening angle, characterized in that: The following steps are involved: S1, temporarily fixing two first inner supports, two second inner supports, two first positioning seats, and two second positioning seats at intervals on the inner circumferential wall of the first stationary chamber segment; S2, placing the manufactured large open angle segment with the large end facing downward on the platform, hoisting the first stationary chamber segment and fitting it on the outer peripheral wall of the large open angle segment; S3, installing a detachable first connecting support between the first inner support and the first mounting base plate on the wide open angle section, and installing a detachable second connecting support between the second inner support and the second mounting base plate on the wide open angle section; installing a detachable first positioning support between the first positioning seat and the first connecting base plate on the wide open angle section, and installing a detachable second positioning support between the second positioning seat and the second connecting base plate on the wide open angle section; S4, hoisting the first resident chamber segment and the large open angle segment connected to each other as a whole and installing them horizontally, completing welding between the first resident chamber segment and the second resident chamber segment; S5, respectively removing the first positioning support and the second positioning support located on the upper part of the wide open angle section, and moving the wide open angle section toward the downstream direction of the wind tunnel, so that the second inner support is moved to the theoretical position on the first chamber section and welded, and moving the first inner support to the theoretical position on the first chamber section and welding, so that the wide open angle section is moved toward the downstream direction of the wind tunnel to the theoretical position; S6, respectively remove the first positioning support and the second positioning support located at the lower part of the large open angle section, move the first positioning support and the second positioning support to the theoretical position of the first chamber segment and weld them, adjust the elevation and axis of the large open angle section to the qualified position, install the first sliding support between the first positioning support and the large open angle section, and the second sliding support between the second positioning support and the large open angle section; remove the first connecting support and the second connecting support on the two opposite inner walls of the large open angle section in turn, and simultaneously install the first movable support between the first inner support and the large open angle section, and the second movable support between the second inner support and the large open angle section.

2. The method for installing a stainless steel wind tunnel with a large opening angle according to claim 1, characterized in that: In step S1, one of the first inner supports, one of the first positioning seats, another of the first inner supports and another of the first positioning seats are arranged at intervals on the first inner circumferential surface of the first chamber segment, and one of the second inner supports, one of the second positioning seats, another of the second inner supports and another of the second positioning seats are arranged at intervals on the second inner circumferential surface of the first chamber segment; the corresponding first inner supports and the second inner supports are arranged at intervals along the extension direction of the first chamber segment, and the corresponding first positioning seats and the second positioning seats are arranged at intervals along the extension direction of the first chamber segment.

3. The method for installing a stainless steel wind tunnel with a large opening angle according to claim 2, characterized in that: The first inner support and the second inner support each include two support plates, a plurality of connecting plates, a reinforcement plate and a mounting plate; the two support plates are installed on the inner wall of the first chamber segment in parallel and at intervals; the plurality of connecting plates are arranged at intervals, and the opposite sides are respectively connected between the two support plates; the mounting plate is installed on the top ends of the two support plates; the reinforcement plate is connected between the mounting plate and the connecting plate located at the upper part.

4. The method for installing a stainless steel wind tunnel with a large opening angle according to claim 2, characterized in that: The first positioning seat and the second positioning seat each include an intermediate plate, two first wing plates, two second wing plates and a positioning plate; the intermediate plate, the first wing plate and the second wing plate are all installed on the inner wall of the first chamber segment, and one side of the two first wing plates are respectively connected to the opposite sides of the intermediate plate, one side of the two second wing plates are respectively connected to the opposite sides of the intermediate plate, and the first wing plate is parallel to the second wing plate; the positioning plate is installed on the top of the intermediate plate, the first wing plate and the second wing plate.

5. The method for installing a stainless steel wind tunnel with a large opening angle according to claim 1, characterized in that: In step S2, after the first chamber segment is welded, a plurality of stainless steel blocks are welded to the inner wall of the first chamber segment, and the first inner support, the second inner support, the first positioning seat, and the second positioning seat are respectively welded to the corresponding stainless steel blocks.

6. The method for installing a stainless steel wind tunnel with a large opening angle according to claim 1, characterized in that: When the first inner support, the second inner support, the first positioning seat, and the second positioning seat are temporarily fixed in the first chamber segment, the distance between the first inner support, the second inner support, the first positioning seat, the second positioning seat and the end face of the large end of the first chamber segment is greater than the set theoretical distance.

7. The method for installing a stainless steel wind tunnel with a large opening angle according to claim 1, characterized in that: In step S3, after the first chamber segment is fitted with the large open angle segment, the large open angle segment is driven to rise and fall relative to the first chamber segment by a hydraulic jack, so that the mounting surface of the first inner support corresponds to the first mounting base plate, the mounting surface of the second inner support corresponds to the second mounting base plate, the mounting surface of the first positioning seat corresponds to the first connecting base plate, and the mounting surface of the second positioning seat corresponds to the second connecting base plate.

8. The method for installing a stainless steel wind tunnel large-angle section according to claim 1, characterized in that: The first connecting support and the second connecting support are both steel structure piers with the same structure but different sizes, and the first positioning support and the second positioning support are both steel structure piers with the same structure but different sizes.

9. The method for installing a stainless steel wind tunnel large-angle section according to claim 8, characterized in that: A polytetrafluoroethylene plate is detachably mounted on the mounting surface of the first inner support, and the first connecting support is detachably arranged on the polytetrafluoroethylene plate, so that when the large open angle section is moved, the large open angle section slides on the polytetrafluoroethylene plate through the first connecting support; A polytetrafluoroethylene plate is detachably mounted on the mounting surface of the second inner support, and the second connecting support is detachably arranged on the polytetrafluoroethylene plate, so that when the large open angle section is moved, the large open angle section slides on the polytetrafluoroethylene plate through the second connecting support; a polytetrafluoroethylene plate is detachably mounted on the mounting surface of the first positioning seat, and the first positioning support is detachably arranged on the polytetrafluoroethylene plate, so that when the large open angle section is moved, the large open angle section slides on the polytetrafluoroethylene plate through the first positioning support; a polytetrafluoroethylene plate is detachably mounted on the mounting surface of the second positioning seat, and the second positioning support is detachably arranged on the polytetrafluoroethylene plate, so that when the large open angle section is moved, the large open angle section slides on the polytetrafluoroethylene plate through the second positioning support.

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