Inner supporting tool applied to welding of outer stringer of stainless steel rocket storage tank cylinder section

Abstract

The utility model provides an inner supporting tool applied to welding of an outer stringer of a stainless steel rocket storage tank cylinder section. The inner supporting tool comprises an inner supporting circle component and an outer supporting circle component, the inner circle supporting component comprises a disc base, and a plurality of inner supporting mechanisms are arranged on the disc base in the circumferential direction of the disc base. The inner supporting mechanism comprises an inner supporting driving cylinder and an inner supporting plate which are arranged in the radial direction of the barrel section, and the inner supporting plate is connected with a telescopic rod of the inner supporting driving cylinder; the telescopic rod of the inner supporting driving cylinder stretches out and draws back to drive the inner supporting plate to be close to or away from the barrel section so that the barrel section can be rounded from the interior of the barrel section. The inner supporting tool can be used for supporting a cylinder section to be round from the interior of a short cylinder when an outer stringer is welded.

Description

Technical Field

[0001] This utility model relates to the field of launch vehicle storage tanks, specifically to an internal support tooling used for welding the outer girder of a stainless steel rocket storage tank section. Background Technology

[0002] In existing manufacturing processes for large-diameter stainless steel rocket propellant tanks, the stringers of the stainless steel short cylinder are primarily used to provide axial support. To reduce wind resistance, the stringers are typically placed on the inner side of the short cylinder. Welding the stringers to the inner side of the short cylinder easily generates difficult-to-clean welding spatter. If the stringers are placed on the outer side of the short cylinder, there is no need for rigorous cleaning of welding spatter.

[0003] To arrange the stringers on the outer side of the short cylinder, it is particularly important to design an internal support fixture for welding the outer stringers of the stainless steel rocket tank section. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an internal support tooling for welding the outer truss of stainless steel rocket tank sections.

[0005] This utility model provides an internal support fixture for welding the outer stringers of a stainless steel rocket propellant tank section, comprising: an internal support circular component; the internal support circular component includes a disc base, and the disc base is provided with multiple internal support mechanisms along its circumferential direction; the internal support mechanism includes an internal support drive cylinder and an internal support plate arranged along the radial direction of the section, and the internal support plate is connected to the telescopic rod of the internal support drive cylinder; by extending and retracting the telescopic rod of the internal support drive cylinder, the internal support plate is driven to move closer to or away from the section, so as to support the section circularly from the inside of the section.

[0006] According to one embodiment of the present invention, the inner support mechanism further includes a transition block; the inner support plate is connected to the telescopic rod of the inner support drive cylinder through the transition block; support plates are respectively provided on both sides of the transition block and fixedly connected to the inner support plate, and the support plates are used to fix and support the inner support plate.

[0007] According to one embodiment of the present invention, the inner support mechanism further includes an inner support circular linear guide rail; the adapter block is slidably disposed relative to the inner support circular linear guide rail.

[0008] According to one embodiment of the present invention, a plurality of inner supporting circular components are provided along the axial direction of the cylindrical section; a plurality of inner supporting circular columns are provided between two adjacent inner supporting circular components to support the inner supporting circular components.

[0009] According to one embodiment of the present invention, the disc base of the inner support circular component near the top of the short cylinder is further provided with a plurality of guide blocks along its circumferential direction. The guide blocks are used to guide the short cylinder as it is fitted onto the inner support fixture.

[0010] According to one embodiment of the present invention, a rotating mechanism is further included, wherein the inner supporting circular component is disposed in the rotating mechanism; the rotating mechanism includes a rotating mechanism base and a driven gear, wherein the driven gear is rotatably disposed relative to the rotating mechanism base to drive the inner supporting circular component and the cylindrical section to rotate.

[0011] According to one embodiment of the present invention, the rotating mechanism further includes a gear drive motor and a drive gear; the drive gear is meshed with the driven gear; when the gear drive motor is started, it drives the drive gear to rotate, thereby causing the driven gear to rotate relative to the base of the rotating mechanism.

[0012] According to one embodiment of the present invention, it further includes an inner support column component, which is used to be placed inside the cylindrical section; the inner support column component includes an inner support column and an inner support mechanism, the inner support mechanism being disposed on the side of the inner support column; the inner support mechanism includes an inner support column drive cylinder and an inner support plate disposed along the radial direction of the cylindrical section, the inner support plate being connected to the telescopic rod of the inner support column drive cylinder; by extending and retracting the telescopic rod of the inner support column drive cylinder, the inner support plate is driven toward or away from the inner side of the cylindrical section, so that the inner support plate supports or releases the inner side of the cylindrical section.

[0013] According to one embodiment of the present invention, along the height direction of the inner support column, the inner support mechanism of the column is provided with a plurality of inner support column drive cylinders, and the plurality of inner support column drive cylinders jointly control the inner support plate of the column to move closer to or away from the cylinder section.

[0014] According to one embodiment of the present invention, the inner support column component further includes an inner support column linear guide rail; the inner support column linear guide rail is arranged along the radial direction of the cylinder section, and the inner support column is slidably arranged relative to the inner support column linear guide rail.

[0015] According to this utility model, an internal support fixture for welding the outer stringers of a stainless steel rocket propellant tank section is provided. By using an internal support circular component to round the section inside, the shape accuracy of the section can be controlled during the welding of the outer stringers.

[0016] It should be understood that the above general description and the following specific embodiments are merely exemplary and illustrative, and do not limit the scope of the present invention. Attached Figure Description

[0017] The accompanying drawings are part of the specification of this utility model and illustrate exemplary embodiments of the utility model. The drawings, together with the description in the specification, are used to illustrate the principles of the utility model.

[0018] Figure 1 This is a perspective view of an embodiment of the present invention, showing an internal support fixture used for welding the outer girder of a stainless steel rocket propellant tank section.

[0019] Figure 2 This is a perspective view of an internal support fixture for welding the outer girder of a stainless steel rocket propellant tank section, according to an embodiment of this utility model.

[0020] Figure 3 yes Figure 2 Top view;

[0021] Figure 4 This is a perspective view of an embodiment of the present invention, showing an internal support fixture used for welding the outer girder of a stainless steel rocket propellant tank section.

[0022] Figure 5 This is a perspective view of an embodiment of the present invention, showing an internal support fixture used for welding the outer girder of a stainless steel rocket propellant tank section.

[0023] Figure 6 This is a perspective view of the inner supporting circular component according to an embodiment of the present utility model;

[0024] Figure 7 This is a perspective view of the internal support mechanism according to an embodiment of the present invention;

[0025] Figure 8 This is a perspective view of the inner supporting circular component according to an embodiment of the present utility model;

[0026] Figure 9 This is a perspective view of a rotating mechanism according to an embodiment of the present invention;

[0027] Figure 10 This is a perspective view of an internal support column component according to an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 2-2 Inner support column component; 2-1-1 Inner support base; 2-1-2 Base column; 2-1-3 Rotating mechanism; 2-1-4 Inner support circular component; 2-1-5 Inner support circular component; 2-1-6 Inner support circular column; 2-1-7 Inner support circular component; 2-1-3-1 Rotating mechanism base; 2-1-3-2 Driven gear; 2-1-3-3 Gear drive motor; 2-1-3-4 Drive gear; 2-1-3-5 Boss; 2-1-4-1 Disc base; 2-1-4-2 Copper support plate; 2-1-4-3 Inner support mechanism; 2-1 -4-4 Column mounting base; 2-1-4-3-1 Inner support circular linear guide rail; 2-1-4-3-2 Inner support drive cylinder; 2-1-4-3-3 Inner support plate; 2-1-4-3-4 Support plate; 2-1-4-3-5 Adapter block; 2-1-5-4 Guide block; 2-2-1 Inner support column base; 2-2-2 Inner support column linear guide rail; 2-2-3 Inner support column; 2-2-4 Column inner support mechanism; 2-2-3-1 Column inner support base; 2-2-3-2 Inner support column drive cylinder; 2-1-4-3-3 Column inner support plate. Detailed Implementation

[0030] The features and exemplary embodiments of various aspects of this utility model will be described in detail below. To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this utility model and to exemplarily illustrate the principles of this utility model, and are not configured to limit this utility model. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the dimensions of some structural components or regions in the drawings may be enlarged for other structural components or regions to aid in the understanding of the embodiments of this utility model.

[0031] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this utility model. In the description of this utility model, it should be noted that, unless otherwise stated, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Furthermore, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure or component that includes a list of elements includes not only those elements but also other structural elements that are not expressly listed or inherent to the structure or component. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes the element.

[0033] Spatial relation terms such as "below," "under," "under," "low," "above," "on," and "high" are used for descriptive convenience to explain the positioning of one element relative to a second element, indicating that these terms are intended to cover different orientations of the device, in addition to those different from those shown in the figure. Furthermore, phrases such as "one element on / below another element" can indicate that two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first" and "second" are also used to describe individual elements, areas, parts, etc., without specifically indicating order or sequence, and should not be considered restrictive. Similar terms are used throughout the description to represent similar elements.

[0034] In the following description of this utility model, the terms "rocket," "launch vehicle," "spacecraft," "space launch vehicle," or "missile" may be used in certain scenarios for ease of description only, and their connotations are not limited to the specific terms used. Generally, the rockets in this utility model include space launch vehicles or launch vehicles used to carry satellites, spacecraft, or other probes, as well as various missiles, rockets, and other weapons used to carry military payloads, and similar products capable of delivering payloads into the air. Those skilled in the art, when interpreting the above specific terms, should not limit the rocket to only one of launch vehicles or missiles based on the specific terms used in the description, thereby narrowing the scope of protection of this utility model.

[0035] For those skilled in the art, this invention can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples.

[0036] Figure 1 This is a perspective view of an embodiment of the present invention, showing an internal support fixture used for welding the outer girder of a stainless steel rocket propellant tank section. Figure 2 This is a perspective view of an embodiment of the present invention, showing an internal support fixture used for welding the outer girder of a stainless steel rocket propellant tank section. Figure 3 yes Figure 2 Top view; Figure 4 This is a perspective view of an embodiment of the present invention, showing an internal support fixture used for welding the outer girder of a stainless steel rocket propellant tank section. Figure 5 This is a perspective view of an embodiment of the present invention, showing an internal support fixture used for welding the outer girder of a stainless steel rocket propellant tank section. Figure 6 This is a perspective view of the inner supporting circular component according to an embodiment of the present utility model; Figure 7 This is a perspective view of the internal support mechanism according to an embodiment of the present invention; Figure 8 This is a perspective view of the inner supporting circular component according to an embodiment of the present utility model; Figure 9 This is a perspective view of a rotating mechanism according to an embodiment of the present invention; Figure 10 This is a perspective view of an internal support column component according to an embodiment of the present invention.

[0037] like Figure 1-7 As shown, this utility model provides an internal support fixture for welding the outer stringers of a stainless steel rocket propellant tank section, comprising: an internal support circular component. The internal support circular component includes a disc base 2-1-4-1, and multiple internal support mechanisms 2-1-4-3 are arranged along the circumferential direction of the disc base 2-1-4-1. The internal support mechanism 2-1-4-3 includes an internal support drive cylinder 2-1-4-3-2 and an internal support plate 2-1-4-3-3 arranged along the radial direction of the tank section. The internal support plate 2-1-4-3-3 is connected to the telescopic rod of the internal support drive cylinder 2-1-4-3-2. By extending and retracting the telescopic rod of the internal support drive cylinder 2-1-4-3-2, the internal support plate 2-1-4-3-3 is driven to move closer to or away from the tank section, thereby expanding the tank section into a circular shape from the inside.

[0038] In this embodiment, the inner support mechanism 2-1-4-3 is used to support the cylindrical section. For example, the inner support plate 2-1-4-3-3 is used to contact the arc-shaped end face of the cylindrical section, which has the same inner diameter as the inner surface of the cylindrical section, to better fit the inner surface of the cylindrical section. The inner support plate 2-1-4-3-3 can be made of brass or copper. For example, as... Figure 7 As shown, the disc base 2-1-4-1 has 12 internal support mechanisms 2-1-4-3 arranged along its circumference. The internal support drive cylinder 2-1-4-3-2 can be an electric cylinder, hydraulic cylinder, etc. The internal support circular component of this internal support fixture can support the cylindrical section from the inside, ensuring the shape of the cylindrical section when welding the stringers to the outer side of the cylindrical section, and eliminating the need for strict cleaning of welding spatter. In addition, this internal support fixture allows for controllable shape tolerances of the short cylinder.

[0039] For example, when the inner support plate 2-1-4-3-3 is located in the position of supporting the short cylinder, multiple inner support plates 2-1-4-3-3 can be spliced ​​together to form a complete circle that matches the inner side of the cylinder section, so as to control the shape accuracy of the short cylinder.

[0040] For example, the internal support mechanism includes multiple first internal support mechanisms and multiple second internal support mechanisms, with the first and second internal support mechanisms spaced apart. When the internal support mechanism is supporting the short cylinder in a rounded state, the internal support plates of the first and second internal support mechanisms are spliced ​​together to form a complete circle that matches the inner surface of the short cylinder. When the internal support mechanism is not needed to support the short cylinder in a rounded state, the telescopic rod of the internal support drive cylinder of the second internal support mechanism retracts first, and then the telescopic rod of the internal support drive cylinder of the first internal support mechanism retracts, and the degree of retraction (or retraction distance) of the telescopic rod of the internal support drive cylinder of the second internal support mechanism is greater than the degree of retraction (or retraction distance) of the telescopic rod of the internal support drive cylinder of the first internal support mechanism.

[0041] like Figure 6 As shown, according to one embodiment of the present invention, a copper support plate 2-1-4-2 is provided on the outer circumferential side of the disc base 2-1-4-1.

[0042] In this embodiment, for example, the copper support plate 2-1-4-2 can be a long strip of copper plate, wrapped around the outer circumferential side of the disc base 2-1-4-1. The copper support plate 2-1-4-2 and the disc base 2-1-4-1 can be locked together by screws or other means to ensure a tight fit.

[0043] like Figure 7 As shown, according to one embodiment of the present invention, in addition to the inner support drive cylinder 2-1-4-3-2 and the inner support plate 2-1-4-3-3, the inner support mechanism 2-1-4-3 also includes a transition block 2-1-4-3-5. The inner support plate 2-1-4-3-3 is connected to the telescopic rod of the inner support drive cylinder 2-1-4-3-2 via the transition block 2-1-4-3-5. Support plates 2-1-4-3-4, which are fixedly connected to the inner support plate 2-1-4-3-3, are respectively provided on both sides (left and right sides) of the transition block 2-1-4-3-5. The support plates 2-1-4-3-4 are used to support the inner support plate 2-1-4-3-3 and prevent deformation when the inner support plate 2-1-4-3-3 is tightened around the short cylinder.

[0044] In this embodiment, for example, the support plate 2-1-4-3-4, the adapter block 2-1-4-3-5, and the inner support plate 2-1-4-3-3 can be locked and fixed by screws or other means.

[0045] like Figure 7 As shown, according to one embodiment of the present invention, in addition to the inner support drive cylinder 2-1-4-3-2, the inner support plate 2-1-4-3-3, and the adapter block 2-1-4-3-5, the inner support mechanism 2-1-4-3 also includes an inner support circular linear guide rail 2-1-4-3-1. The adapter block 2-1-4-3-5 is slidably disposed relative to the inner support circular linear guide rail 2-1-4-3-1 to drive the inner support plate 2-1-4-3-3 to move closer to or away from the cylinder section.

[0046] In this embodiment, the inner supporting circular linear guide 2-1-4-3-1 is arranged along the radial direction of the disc base 2-1-4-1. For example, the inner supporting circular linear guide 2-1-4-3-1 can be locked and fixed to the disc base 2-1-4-1 and the disc base 2-1-4-1 by means of screws or the like.

[0047] According to one embodiment of the present invention, a plurality of inner supporting circular components 2-1 are provided along the axial direction of the cylindrical section. A plurality of inner supporting circular columns 2-1-6 are provided between two adjacent inner supporting circular components 2-1 to support the inner supporting circular components 2-1.

[0048] In this embodiment, for example, such as Figure 5 As shown, three inner support circular components are arranged along the axial direction of the cylinder section (2-1-7, 2-1-4, and 2-1-5 from bottom to top). The three inner support circular components have the same or similar structures to better support and fix the cylinder section.

[0049] like Figure 6 As shown, according to one embodiment of the present invention, the inner supporting circular component (2-1-7, 2-1-4) is provided with a column mounting seat 2-1-4-4, which is used to install the inner supporting circular column 2-1-6 to support the inner supporting circular component (2-1-4, 2-1-5) above it.

[0050] In this embodiment, for example, the disc base 2-1-4-1 is provided with 6 inner supporting circular columns 2-1-6 along its circumferential direction. The column mounting base 2-1-4-4 and the inner supporting circular columns 2-1-6 can be locked and fixed by bolts or welding.

[0051] like Figure 8 As shown, multiple guide blocks 2-1-5-4 are also provided along the circumferential direction of the inner supporting circular component 2-1-5 near the top of the short cylinder. The guide blocks 2-1-5-4 are used to guide the short cylinder as it is fitted onto the inner supporting circular component.

[0052] In this embodiment, guide blocks 2-1-5-4 are used to guide the short cylinder fitted onto the inner supporting circular component, facilitating the loading and unloading of the short cylinder. For example, guide blocks 2-1-5-4 can be disposed on the inner supporting mechanism of the inner supporting circular component 2-1-5 near the top of the short cylinder. For example, 12 guide blocks 2-1-5-4 are disposed along the circumferential direction on the disc base of the inner supporting circular component 2-1-5 near the top of the short cylinder.

[0053] like Figure 5 and 9As shown, according to one embodiment of the present invention, in addition to the inner support circular component, the inner support fixture also includes a rotating mechanism 2-1-3. The inner support circular component is disposed on the rotating mechanism 2-1-3. The rotating mechanism 2-1-3 includes a rotating mechanism base 2-1-3-1 and a driven gear 2-1-3-2. The driven gear 2-1-3-2 is rotatably disposed relative to the rotating mechanism base 2-1-3-1 to drive the inner support circular component and the cylindrical section to rotate.

[0054] In this embodiment, for example, the disc base of the lowest inner support circular component 2-1-7 can be fixed to the driven gear 2-1-3-2 with screws to drive the inner support circular component 2-1-7 to rotate.

[0055] Furthermore, the inner support component 2 may also include an inner support base 2-1-1. The inner support base 2-1-1 has multiple base columns 2-1-2 arranged along its circumferential direction (e.g., six base columns 2-1-2). A rotating mechanism 2-1-3 is disposed on the base columns 2-1-2; for example, the rotating mechanism base 2-1-3-1 is supported by the base columns 2-1-2. The rotating mechanism 2-1-3 and the base columns 2-1-2 can be fixedly connected by bolts; for example, the rotating mechanism base 2-1-3-1 and the base columns 2-1-2 are fixedly connected by bolts.

[0056] According to one embodiment of the present invention, in addition to the rotating mechanism base 2-1-3-1 and the driven gear 2-1-3-2, the rotating mechanism 2-1-3 also includes a gear drive motor 2-1-3-3 and a drive gear 2-1-3-4. The drive gear 2-1-3-4 is meshed with the driven gear 2-1-3-2, and the gear drive motor 2-1-3-3 and the drive gear 2-1-3-4 are fixedly connected. When the gear drive motor 2-1-3-3 is started, it drives the drive gear 2-1-3-4 to rotate, thereby causing the driven gear 2-1-3-2 to rotate relative to the rotating mechanism base 2-1-3-1.

[0057] In this embodiment, the drive gear 2-1-3-4 is connected to the rotor of the gear drive motor 2-1-3-3. For example, the gear drive motor 2-1-3-3 can be mounted on the base 2-1-3-1 of the rotating mechanism and fixed by bolts. This inner support fixture, through the gear drive motor 2-1-3-3 and the rotatable driven gear 2-1-3-2, can drive the inner support circular component and the cylindrical section to rotate and position, so as to precisely control the welding position of the stringers on the short cylinder.

[0058] Furthermore, the rotating mechanism 2-1-3 also includes a boss 2-1-3-5. The boss 2-1-3-5 is fitted onto the circumferential outer side of the driven gear 2-1-3-2 to protect the driven gear 2-1-3-2.

[0059] In this embodiment, the boss 2-1-3-5 is fixedly mounted on the base 2-1-3-1 of the rotating mechanism, with a clearance between the boss 2-1-3-5 and the driven gear 2-1-3-2. For example, the boss 2-1-3-5 can be fixed to the base 2-1-3-1 of the rotating mechanism using screws or the like. The outer diameter of the boss 2-1-3-5 is slightly smaller than the outer diameter of the supporting short cylinder, providing operating space for the external pressure component (used to press the stringer to the outer side of the cylinder section).

[0060] like Figure 4 and 10 As shown, according to one embodiment of the present invention, in addition to the inner support circular component, the inner support fixture also includes an inner support column component 2-2. The inner support column component 2-2 is used to be placed inside the cylindrical section. The inner support column component 2-2 includes an inner support column 2-2-3 and a column inner support mechanism 2-2-4, which is disposed on the side of the inner support column 2-2-3. The column inner support mechanism 2-2-4 includes an inner support column drive cylinder 2-2-3-2 and a column inner support plate 2-1-4-3-3 disposed along the radial direction of the cylindrical section, and the column inner support plate 2-1-4-3-3 is connected to the telescopic rod of the inner support column drive cylinder 2-2-3-2. The telescopic rod of the inner support column drive cylinder 2-2-3-2 extends and retracts, driving the inner support plate 2-1-4-3-3 of the column to move towards or away from the inner side of the cylinder section, so that the inner support plate 2-1-4-3-3 of the column supports or releases the inner side of the cylinder section.

[0061] In this embodiment, during the welding of the stringers, the inner support column component 2-2 can tighten the welding position from the inner side of the cylindrical section and cooperate with the inner support circular component (in its supported circular state) to form the inner support cylindrical surface for stringer welding, ensuring welding accuracy and quality, and guaranteeing the stability of the weld quality. For example, multiple sets of column inner support mechanisms 2-2-4 are arranged along the axial direction of the cylindrical section (i.e., the height direction of the inner support column 2-2-3) (for example, two sets of column inner support mechanisms 2-2-4 are arranged). A gap is left between adjacent sets of column inner support mechanisms 2-2-4 to provide installation and operating space for the inner support circular component. For example, the column inner support plate 2-1-4-3-3 can be made of copper, which can prevent the cylindrical section from being welded to the inner support component.

[0062] According to one embodiment of the present invention, along the height direction of the inner support column 2-2-3, each group of inner support mechanisms 2-2-4 can be equipped with multiple inner support column drive cylinders 2-2-3-2 (for example, three inner support column drive cylinders 2-2-3-2). The multiple inner support column drive cylinders 2-2-3-2 together control the inner support plate 2-1-4-3-3 of the column to move closer to or away from the cylinder section.

[0063] According to one embodiment of the present invention, in addition to the inner support column drive cylinder 2-2-3-2 and the inner support plate 2-1-4-3-3, the inner support mechanism 2-2-4 includes an inner support base 2-2-3-1 disposed on the side of the inner support column 2-2-3.

[0064] According to one embodiment of the present invention, in addition to the inner support column 2-2-3 and the column inner support mechanism 2-2-4, the inner support column component 2-2 also includes an inner support column linear guide rail 2-2-2. The inner support column linear guide rail 2-2-2 is arranged along the radial direction of the cylinder section, and the inner support column 2-2-3 is slidably arranged relative to the inner support column linear guide rail 2-2-2.

[0065] In this embodiment, the inner support column 2-2-3 slides relative to the inner support column linear guide 2-2-2, which allows space to be created when the inner support circular component rotates, thus preventing interference between the inner support column 2-2-3 and the inner support circular component. For example, the inner support column 2-2-3 can be fixedly installed on the slider of the inner support column linear guide 2-2-2.

[0066] Furthermore, the inner support column 2-2-3 can be installed on the inner support column base 2-2-1.

[0067] In this embodiment, for example, the inner support base 2-1-1 can be disposed on the inner support column base 2-2-1 and fixed by bolts. The inner support base 2-1-1 has a ring structure, and the inner support column 2-2-3 or the inner support column linear guide rail 2-2-2 is disposed on the inner support column base 2-2-1 through the hollow part of the inner support base 2-1-1. For example, the inner support base 2-1-1 can be fixed to the ground by bolts. The inner support column linear guide rail 2-2-2 and the inner support column base 2-2-1 are fixed by screws or other means.

[0068] The above embodiments of this utility model can be combined with each other and have corresponding technical effects.

[0069] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An internal support fixture for welding the outer girder of a stainless steel rocket propellant tank section, characterized in that, include: An inner supporting circular component; the inner supporting circular component includes a disc base, and the disc base is provided with a plurality of inner supporting mechanisms along its circumferential direction; the inner supporting mechanism includes an inner supporting drive cylinder and an inner supporting plate arranged along the radial direction of the cylindrical section, and the inner supporting plate is connected to the telescopic rod of the inner supporting drive cylinder; by extending and retracting the telescopic rod of the inner supporting drive cylinder, the inner supporting plate is driven to move closer to or away from the cylindrical section, so as to support the cylindrical section in a circular shape from the inside of the cylindrical section.

2. The internal support fixture according to claim 1, characterized in that, The internal support mechanism also includes a transition block; the internal support plate is connected to the telescopic rod of the internal support drive cylinder through the transition block; support plates are respectively provided on both sides of the transition block and are fixedly connected to the internal support plate, and the support plates are used to fix and support the internal support plate.

3. The internal support fixture according to claim 2, characterized in that, The inner support mechanism also includes an inner support circular linear guide rail; the adapter block is slidably disposed relative to the inner support circular linear guide rail.

4. The internal support fixture according to claim 1, characterized in that, Multiple inner supporting circular components are provided along the axial direction of the cylindrical section; multiple inner supporting circular columns are provided between two adjacent inner supporting circular components to support the inner supporting circular components.

5. The internal support fixture according to claim 4, characterized in that, The disc base of the inner support circular component near the top of the short cylinder is also provided with a plurality of guide blocks along its circumferential direction. The guide blocks are used to guide the short cylinder as it is fitted onto the inner support fixture.

6. The internal support fixture according to claim 1, characterized in that, It also includes a rotating mechanism, on which the inner supporting circular component is disposed; the rotating mechanism includes a rotating mechanism base and a driven gear, the driven gear being rotatably disposed relative to the rotating mechanism base to drive the inner supporting circular component and the cylindrical section to rotate.

7. The internal support fixture according to claim 6, characterized in that, The rotating mechanism further includes a gear drive motor and a drive gear; the drive gear is meshed with the driven gear; when the gear drive motor is started, it drives the drive gear to rotate, thereby causing the driven gear to rotate relative to the base of the rotating mechanism.

8. The internal support fixture according to claim 1, characterized in that, It also includes an internal support column component, which is placed inside the cylindrical section; the internal support column component includes an internal support column and an internal support mechanism, the internal support mechanism being disposed on the side of the internal support column; the internal support mechanism includes an internal support column drive cylinder and an internal support plate disposed along the radial direction of the cylindrical section, the internal support plate being connected to the telescopic rod of the internal support column drive cylinder; by extending and retracting the telescopic rod of the internal support column drive cylinder, the internal support plate is driven toward or away from the inner side of the cylindrical section, so that the internal support plate supports or releases the inner side of the cylindrical section.

9. The internal support fixture according to claim 8, characterized in that, Along the height direction of the inner support column, the inner support mechanism of the column is provided with multiple inner support column drive cylinders, and the multiple inner support column drive cylinders jointly control the inner support plate of the column to move closer to or away from the cylinder section.

10. The internal support fixture according to claim 8, characterized in that, The inner support column component also includes an inner support column linear guide rail; the inner support column linear guide rail is arranged along the radial direction of the cylinder section, and the inner support column is slidably arranged relative to the inner support column linear guide rail.

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