A method for installing a large opening angle section of a stainless steel wind tunnel

Abstract

The application provides a mounting method for a large-opening-angle section of a stainless steel wind tunnel, which comprises the following steps: fixing a first inner support, a second inner support, a first positioning seat and a second positioning seat in a first chamber section; placing the large-opening-angle section with a large end downward on a platform; hoisting the first chamber section and the large-opening-angle section to be sleeved; mounting a first detachable connecting support, a second detachable connecting support, a first detachable positioning support and a second detachable positioning support between the first inner support, the second inner support, the first positioning seat, the second positioning seat and the large-opening-angle section; hoisting the first chamber section and the large-opening-angle section as a whole to a position, and mounting horizontally, and welding the first chamber section and a second chamber section; moving the large-opening-angle section, the first inner support, the second inner support, the first positioning seat and the second positioning seat synchronously for multiple times until the theoretical position of the chamber section is reached, and then mounting a first sliding support, a second sliding support, a first moving support and a second moving support. The method solves the problem that the large-opening-angle section of the wind tunnel is difficult to install, and improves the construction efficiency.

Description

Technical Field

[0001] The present application relates to the field of wind tunnels, and in particular to a method for installing a large-opening-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 test objects (such as aircraft) become increasingly larger, conventional wind tunnel testing faces several significant challenges. The most important of these is that conventional wind tunnels cannot perform tests within the full-scale Reynolds number range. High-Reynolds number wind tunnel testing is the prerequisite and guarantee for achieving precise design of aircraft aerodynamics and accurate prediction of flight performance. Stainless steel wind tunnels were created and developed to address this issue.

[0003] Conventional carbon steel wind tunnels typically have a wide-opening section with an expansion angle of 30 to 90 degrees. The structure is a conical single-layer shell, welded upstream to the fourth corner section outlet cylinder and flange-connected or welded downstream to the stable section. Installation requires hoisting equipment to hoist the entire section into place. Stainless steel wind tunnels experience significant contraction and movement under cryogenic conditions, so they are designed as a double-layer shell structure: the wide-opening section is a hyperbolic shell with a mounting base along the shell axis. The inner wall of the stationary section is insulated to ensure the stability of the wind tunnel's outer shell, and internal supports are welded along the shell axis. The wide-opening section mounting base is mounted on the stationary section's internal supports via sliding supports, enabling movement and contraction at low temperatures.

[0004] Figure 1 This is a structural diagram of the large-open-angle section of a stainless steel wind tunnel installed in the stationary chamber. When the large-open-angle section 3 of the stainless steel wind tunnel is installed, if the existing technology is used to hoist it as a whole, the first stationary chamber section 1 of the outer shell cannot be installed; since the large-open-angle section 3 of the stainless steel wind tunnel 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 pushing and sliding 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. 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 problems. Summary of the Invention

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

[0007] The technical solution of this application is:

[0008] A method for installing a stainless steel wind tunnel with a 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 to the inner circumferential wall of the first stationary chamber segment at intervals;

[0010] S2, placing the completed large-open-angle segment with its large end facing downward on a platform, hoisting the first stationary chamber segment and fitting it onto 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 on the wide-open-angle section, and installing a detachable second connecting support between the second inner support and the second mounting base on the wide-open-angle section; installing a detachable first positioning support between the first positioning seat and the first connecting base on the wide-open-angle section, and installing a detachable second positioning support between the second positioning seat and the second connecting base on the wide-open-angle section;

[0012] S4, hoisting the connected first resident chamber segment and the large-opening-angle segment as a whole and performing horizontal installation, completing welding between the first resident chamber segment and the second resident chamber segment;

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

[0014] S6, remove the first positioning support and the second positioning support located at the lower part of the large open angle section respectively, 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 first inner support and another first positioning seat 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 second inner support and another second positioning seat 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, multiple 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 multiple 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 both 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, and 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, multiple 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 entire section into position. This solves the problem that the existing technology cannot install the large-open-angle section of a stainless steel wind tunnel. At the same time, this 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. This solves the problem that the existing technology is difficult to install the inner supports and the closing welds are difficult to implement, and also improves the construction efficiency and ensures the welding quality. In addition, this method uses 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 into the stationary chamber, and uses the first connecting support, the second connecting support, the first positioning support and the second positioning support to realize the 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 fixed by welding with tooling supports, which makes it impossible to effectively realize sliding and contaminates the double-layer shell when the tooling supports are removed, reducing the 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 following is a brief introduction to the drawings required for use in the implementation methods. 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 relevant drawings can be obtained based on these drawings without paying any 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 chamber;

[0027] Figure 2 Schematic diagram of temporary fixation 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 stationary 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 5Schematic 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] Figure 9 A schematic diagram of a first sliding support provided in an embodiment of the present application;

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

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

[0037] Figure 12 A schematic diagram of the first process of installing a large open angle section according to an embodiment of the present application;

[0038] Figure 13 A schematic diagram of the second process of installing a large open angle section according to an embodiment of the present application;

[0039] Figure 14 A schematic diagram of the third process of installing a large open angle section according to an embodiment of the present application;

[0040] Figure 15 A schematic diagram of the fourth process of installing a large open angle section according to an embodiment of the present application;

[0041] Figure 16 Schematic diagram of the fifth process of installing the wide-open-angle section provided in an embodiment of the present application.

[0042] Icons: 1-first chamber segment; 2-second chamber segment; 3-large open angle segment; 4-first inner support; 5-second inner support; 6-first sliding support; 7-first positioning seat; 8-second positioning seat; 9-first mounting base; 10-first connecting support; 11-polytetrafluoroethylene plate; 12-second mounting base; 13-second connecting support; 14-first connecting base; 15-first positioning support; 16-second connecting base; 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] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein 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 protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall 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, it does not need to be further defined or explained in subsequent drawings.

[0046] In the description of this application, it should be noted that the terms "upper" and "lower" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the invented product is usually placed when in use. These are only for the convenience of describing this 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. Therefore, they should not be understood as limitations on this application.

[0047] In addition, in this application, unless otherwise expressly specified or limited, the phrase "a first feature is above or below a second feature" may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, the phrases "above, above, and above the second feature" may include the first feature being directly above and obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The phrases "below, below, and below the second feature" may include the first feature being directly below and obliquely below the second feature, or simply indicate that the first feature is lower in level than the second feature.

[0048] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0049] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the 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 is provided, which is aimed at a main body such as Figure 1 As shown: the first resident chamber segment 1 is a conical cylinder, the second resident chamber segment 2 is a straight cylinder, the first resident chamber segment 1 and the second resident chamber segment 2 are welded, wherein most of the large open angle segment 3 is located in the first resident chamber segment 1, and the outlet part of the large open angle segment 3 is located in the second resident chamber segment 2. The two first inner supports 4 and the two first positioning seats 7 are located at the weld positions of the first chamber segment 1 and the second chamber segment 2, and the two second inner supports 5 and the two second positioning seats 8 are close to the inlet end face of the first chamber segment 1. 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. 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 first mounting base plates 9, second mounting base plates 12, first connecting base plates 14 and second connecting base plates 16 are arranged at intervals on the large open angle section 3. Each circle of first mounting base plates 9, second mounting base plates 12, first connecting base plates 14 and second connecting base plates 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 station chamber segment 1 with the larger diameter end facing downwards is assembled and welded vertically. After welding, a certain number of stainless steel blocks are welded to the inner wall of the first station chamber segment 1. 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 stationary chamber segment 1 are greater than the theoretical distance.

[0053] Since the primary material of the stainless steel wind tunnel is austenitic stainless steel, to avoid iron ion contamination, stainless steel blocks were used as the temporary fixing material for the first inner support 4, second inner support 5, first positioning seat 7, and second positioning seat 8. By moving the first inner support 4, second inner support 5, first positioning seat 7, and second positioning seat 8 as a whole toward the upstream position of the wind tunnel and temporarily fixing them, this not only prevents obstruction by the first inner support 4 and second positioning seat 8 during the alignment of the first and second station chamber sections 1 and 2, but also allows the first inner support 4, second inner support 5, first positioning seat 7, and second positioning seat 8 to be temporarily fixed to the station chamber and hoisted as a whole, avoiding difficulties in subsequent installation.

[0054] like Figure 3 and Figure 4 As shown, the completed wide-angle section 3 is placed upright on a platform with the larger diameter end facing downward. The first stationary chamber segment 1, to which the first inner support 4, second inner support 5, first positioning seat 7, and second positioning seat 8 are temporarily fixed, is lifted vertically and moved above the wide-angle section 3 and slowly lowered to complete the fitting of the wide-angle section 3. A hydraulic jack is installed between the wide-angle section 3 and the platform. After the first stationary chamber segment 1 is lowered onto the platform, the height of the wide-angle section 3 is adjusted using the hydraulic jack so that the mounting surfaces of the first inner support 4, second inner support 5, first positioning seat 7, and second positioning seat 8 correspond one-to-one with the first mounting base plate 9, second mounting base plate 12, first connecting base plate 14, and second connecting base plate 16 on the wide-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 their larger diameter ends facing downward, the first station chamber segment 1 can be hoisted and installed simultaneously 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 mounting base plate 9, the second mounting base plate 12, the first connecting base plate 14 and the second connecting base plate 16 of the wide-open angle segment 3 are aligned with 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, the position of the wide-open angle segment 3 in the first station chamber segment 1 is moved upstream of the wind tunnel compared to the theoretical position, thus 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 later assembled.

[0056] It should be noted that the two first inner supports 4 are arranged symmetrically with respect to the wide-open-angle section 3, the two second inner supports 5 are arranged symmetrically with respect to the wide-open-angle section 3, the two first positioning seats 7 are arranged symmetrically with respect to the wide-open-angle section 3, and the two second positioning seats 8 are arranged symmetrically with respect to the wide-open-angle section 3. In addition, the first inner supports 4 and the second inner supports 5 have the same structure, both comprising 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 ends of the two support plates 21; and the reinforcement plate 23 is connected between the mounting plate 24 and the connecting plate 22 located at the top. 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 plates 26 and the second wing plates 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 base 9 of the wide-angle section 3 and 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 base 12 of the wide-angle section 3 and 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 base 14 of the wide-angle section 3 and 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 base 16 of the wide-angle section 3 and fastened with bolts. The first station chamber segment 1 and the wide-angle section 3 connected together are hoisted as a whole and installed horizontally to complete the welding between the first station chamber segment 1 and the second station chamber segment 2.

[0058] Please refer to Figure 1 , since the first inner support 4 and the first movable support 19 are connected by bolts, the second inner support 5 and the second movable support 20 are connected by bolts, the first positioning seat 7 and the first sliding support 6 are connected by bolts, and the second positioning seat 8 and the second sliding support 18 are connected by bolts, 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. Correspondingly, the first mounting base plate 9 and the first movable support 19 are also connected by bolts, the second mounting base plate 12 and the second movable support 20 are connected by bolts, the first connecting base plate 14 and the first sliding support 6 are connected by bolts, and the second connecting base plate 16 and the second sliding support 18 are connected by bolts. Therefore, 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 connecting support 10 and the second connecting support 13 are both steel structure piers, and the size of the first connecting support 10 is larger than that of the second connecting support 13. Both of them include a first top plate, a first bottom plate, a first supporting plate, and a plurality of first receiving plates. The first top plate and the first bottom plate are arranged 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 wide-open-angle section 3 and the first station chamber segment 1 can be bolted and fixed by a plurality of bolts without the need for tooling support welding connection, thereby avoiding the contamination 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 subsequent 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 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; use tools such as a fall chain to move the large open angle section 3 a certain distance downstream of the wind tunnel. The moving distance must not exceed half 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 from the second inner support 5, use the fall chain to move the second inner support 5 to the desired position in the first station chamber segment 1, and complete the welding. Then remove the stainless steel block from the first inner support 4, use the fall chain to move the first inner support 4 to the desired position in 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 wide-angle section 3 can be maintained. Finally, the wide-angle section 3 is moved downstream of the wind tunnel to the desired position.

[0060] If the wide-open-angle section 3 moves a long distance, the wide-open-angle section 3 and the corresponding first inner support 4 and second inner support 5 can be repeatedly moved multiple times to maintain the stability of the wide-open-angle section 3. Specifically, first move the wide-open-angle section 3 a certain distance downstream of the wind tunnel, move the second inner support 5 a certain distance parallel to the downstream direction of the wind tunnel and temporarily secure it, then move the first inner support 4 a certain distance parallel to the downstream direction of the wind tunnel and temporarily secure it, then move the wide-open-angle section 3 a certain distance downstream of the wind tunnel again, move the second inner support 5 to the theoretical position of the first station chamber segment 1 and perform welding, then move the first inner support 4 to the theoretical position of the first station chamber segment 1 and perform welding, and finally move the wide-open-angle section 3 to the theoretical position downstream 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 a countersunk hole corresponding to the mounting surface of the mounting plate 24 of the first inner support 4, and the polytetrafluoroethylene plate 11 is connected to the mounting plate 24 of the first inner support 4 by bolts, and the polytetrafluoroethylene plate 11 is provided with a countersunk hole corresponding to the mounting surface of the second inner support 5 The mounting surface of the mounting plate 24 has corresponding countersunk holes, which connect the polytetrafluoroethylene plate 11 to the mounting plate 24 of the second inner support 5 by bolts. In addition, the polytetrafluoroethylene plate 11 is provided with countersunk holes that correspond one-to-one with the mounting surface of the positioning plate 28 of the first positioning seat 7, which connect the polytetrafluoroethylene plate 11 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 that correspond one-to-one with the mounting surface of the positioning plate 28 of the second positioning seat 8, which connect the polytetrafluoroethylene plate 11 to the positioning plate 28 of the second positioning seat 8 by bolts. Furthermore, when the wide-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 that slide on the corresponding polytetrafluoroethylene plates 11, thereby driving the wide-open-angle section 3 to move.

[0062] Remove the first and second positioning supports 15 and 17 located at the bottom of the wide-open-angle section 3. The wide-open-angle section 3 is now secured by the first and second inner supports 4 and 5. Remove the stainless steel blocks on the first and second positioning supports 7 and 8, respectively. Use the fall chain to move the first and second positioning supports 7 and 8 to the theoretical position of the first stationary section 1 and complete the welding. Use the first and second inner supports 4 and 5 to adjust the elevation and axis of the wide-open-angle section 3. Install the first sliding support 6 between the first positioning support 7 and the wide-open-angle section 3, and the second sliding support 18 between the second positioning support 8 and the wide-open-angle section 3. First, remove the second connecting support 13 on one of the second inner supports 5 and install the corresponding second movable support 20. Then remove the second connecting support 13 on the other second inner support 5 and install the corresponding second movable support 20. Then, remove the first connecting support 10 on one of the first inner supports 4 and install the corresponding first movable support 19. Finally, remove the first connecting support 10 on the other first inner support 4 and install the corresponding first movable support 19. 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 side 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 of the limit seat; therefore, the first sliding support 6 and the second sliding support 18 can achieve 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 station 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 large open angle section 3 can be moved and adjusted in the station chamber, thereby ensuring the installation elevation and axis of the large open angle section 3, ensuring the installation quality, and solving the problem of difficult installation of 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 fits the large-open-angle section 3 and the station chamber together 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 station chamber and then hoist it as a whole, 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 adjusts 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 to move downstream of the wind tunnel after the closing welds between the station chamber sections are welded, solving the problem that the internal supports are difficult to install and the closing welds are difficult to implement in the prior art, thereby improving construction efficiency and ensuring welding quality. Furthermore, this method utilizes internal supports, positioning supports, connecting supports, and positioning supports to bolt the wide-angle section 3 to the station chamber. The connecting supports and positioning supports are used to enable the wide-angle section 3 to slide and adjust its position within the station chamber. This solves the existing problem of using fixture supports and welding to secure the double-layer shell during assembly, which prevents effective sliding and contaminates the double-layer shell when the fixture supports are removed. This reduces construction difficulty and saves costs. Furthermore, this application utilizes a process for temporarily securing the double-layer curved shell after assembly and then hoisting the entire shell, resolving the existing problem of ineffective installation of the wide-angle section 3 of the stainless steel wind tunnel. Furthermore, this method utilizes a process for installing the inner components forward and then adjusting them backward, resolving the difficulty of assembling and welding the outer shell during double-layer shell installation due to obstruction caused by the inner shell. Furthermore, a connecting device designed based on the structural characteristics of the stainless steel wind tunnel allows for position and precision adjustment of the double-layer shell, resolving the existing problem of welding to secure the double-layer shell during assembly, which prevents effective sliding and contaminates the stainless steel shell when the fixture supports are removed.

[0066] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection 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 to the inner circumferential wall of the first stationary chamber segment at intervals; S2, placing the completed large-open-angle segment with its large end facing downward on a platform, hoisting the first stationary chamber segment and fitting it onto 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 on the wide-open-angle section, and installing a detachable second connecting support between the second inner support and the second mounting base on the wide-open-angle section; installing a detachable first positioning support between the first positioning seat and the first connecting base on the wide-open-angle section, and installing a detachable second positioning support between the second positioning seat and the second connecting base on the wide-open-angle section; S4, hoisting the connected first resident chamber segment and the large-opening-angle segment as a whole and performing horizontal installation, completing welding between the first resident chamber segment and the second resident chamber segment; S5, removing the first positioning support and the second positioning support located on the upper portion of the wide-open-angle section respectively, and moving the wide-open-angle section toward the downstream of the wind tunnel so that the second inner support is moved to the theoretical position on the first chamber segment and welded, and moving the first inner support to the theoretical position on the first chamber segment and welding, so that the wide-open-angle section is moved toward the downstream of the wind tunnel to the theoretical position; S6, remove the first positioning support and the second positioning support located at the lower part of the large open angle section respectively, 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 first inner support and another first positioning seat 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 second inner support and another second positioning seat 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, multiple connecting plates, a reinforcement plate and a mounting plate; the two support plates are installed in parallel and at intervals on the inner wall of the first chamber segment; the multiple 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 both 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, and 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, multiple 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 with a large opening angle 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. 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 with a large opening angle 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 disposed 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 opening angle section is moved, the large opening 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 opening angle section is moved, the large opening 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 opening angle section is moved, the large opening angle section slides on the polytetrafluoroethylene plate through the second positioning support.

Images