Working platform in bottom of rocket storage tank and mounting method of working platform

Abstract

The invention relates to a working platform in the bottom of a rocket storage tank and a mounting method of the working platform. The bottom of the rocket storage tank at least comprises a scalloped segment and a manhole formed in the bottom of the rocket storage tank. The working platform comprises a supporting mechanism, a mounting mechanism and a plurality of standing mechanisms, one end of the supporting mechanism is used for extending into the bottom of the rocket storage tank through a manhole, and when one end of the supporting mechanism is located in the bottom of the rocket storage tank, the mounting mechanism is detachably mounted at the end, located in the bottom of the rocket storage tank, of the supporting mechanism; the multiple standing mechanisms are detachably mounted on the mounting mechanism in the circumferential direction of the mounting mechanism in sequence, buffer layers are mounted at the ends, away from the mounting mechanism, of the standing mechanisms, and the tail ends of the buffer layers are used for abutting against the side walls of the ends, located in the bottom of the rocket storage tank, of the scalloped segments. The occupied area of the rocket storage tank can be reduced, the product quality of the rocket storage tank is guaranteed, the working efficiency is improved, and danger is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of rocket tanks, and in particular to a working platform inside a bottom of a rocket tank and an installation method thereof. Background Art

[0002] Rocket tanks, as the name implies, can be used to store propellants (such as liquid oxygen, liquid hydrogen, liquid oxygen methane, etc.) that provide power for rockets. Therefore, the rocket tank is the "fuel depot" of the rocket, which is responsible for storing and transporting propellants. At the same time, the rocket tank can also serve as the main load-bearing structure of the rocket to provide structural support for the rocket. For example, the rocket tank can withstand the huge loads generated during the launch and flight of the launch vehicle, and provide sufficient support for the launch vehicle. Therefore, the rocket tank is an indispensable core component of the launch vehicle, which is very critical and important to the launch vehicle.

[0003] A rocket tank is usually composed of a barrel section, a bottom and a top, and the bottom is usually an elliptical thin-walled structure, and is mainly formed by splicing multiple melon segments, cone sections and a top cover. In the production process of the rocket tank bottom, the weld seam (i.e., the splicing gap) of the rocket tank bottom needs to be welded to complete the sealing of the rocket tank bottom.

[0004] At present, the usual way to weld the welds on the bottom of a rocket tank is to first splice the multiple melon segments, cone segments and top covers of the bottom of the rocket tank, and place the spliced ​​bottom of the rocket tank in a horizontal position. Then the operator needs to carry a ladder to enter the inside of the rocket tank bottom, and install the inner support tooling and the back protective gas device inside the rocket tank bottom, and finally weld the outside of the rocket tank bottom.

[0005] However, the traditional method of welding the weld seam of the rocket tank bottom has many problems, such as:

[0006] 1. In order to reduce the danger of operators working at heights, the bottom of the rocket tank needs to be placed in a horizontal position. Compared with vertical placement, horizontal placement greatly increases the footprint of the bottom of the rocket tank.

[0007] 2. When the operator uses a ladder to install the inner support tooling and the back protective gas device inside the bottom of the rocket tank, the ladder will easily scratch the inner wall of the bottom of the rocket tank. Moreover, since the wall thickness of the rocket tank is relatively thin, the ladder will easily squeeze the inner wall of the bottom of the rocket tank and cause pits on the inner wall of the bottom of the rocket tank, thereby greatly reducing the product quality of the rocket tank.

[0008] 3. Since operators need to use ladders to install inner support tooling and back protective gas devices inside the bottom of the rocket tank, and the operating space of the ladder is very limited, when installation is required at multiple locations inside the bottom of the rocket tank, operators need to frequently go up and down the ladder and move positions, resulting in very low work efficiency.

[0009] 4. Since the inner wall of the rocket tank is very smooth, when the operator uses a ladder to install the inner support tooling and the back protective gas device, the ladder is very likely to slide relative to the inner wall of the bottom of the rocket tank, which can easily cause the operator to fall from the ladder, greatly increasing the danger.

[0010] Therefore, there is an urgent need for a platform for working inside the bottom of a rocket tank to solve the drawbacks of the above-mentioned problems. Summary of the invention

[0011] The purpose of the present invention is to provide a working platform inside the bottom of a rocket tank and an installation method thereof to solve the problems existing in the above-mentioned prior art.

[0012] To achieve the above object, the present invention provides the following solutions:

[0013] A first aspect of the present invention provides a working platform inside a rocket tank bottom, wherein the rocket tank bottom comprises at least melon segments and a manhole opened on the rocket tank bottom.

[0014] The working platform comprises a supporting mechanism, a mounting mechanism and a plurality of standing mechanisms, wherein:

[0015] One end of the support mechanism is used to extend to the inside of the bottom of the rocket tank through the manhole. When one end of the support mechanism is located inside the bottom of the rocket tank, the mounting mechanism can be detachably mounted on the end of the support mechanism located inside the bottom of the rocket tank.

[0016] Several of the standing mechanisms are detachably mounted on the mounting mechanism in sequence along the circumference of the mounting mechanism, and a buffer layer is installed at one end of the standing mechanism away from the mounting mechanism, and the end of the buffer layer is used to abut against the side wall of one end of the melon segment located inside the bottom of the rocket tank.

[0017] According to one embodiment of the present invention, the supporting mechanism includes a base, a supporting member is installed on the top of the base, and the top of the supporting member is used to extend to the inside of the bottom of the rocket tank through a manhole. When the top of the supporting member is located inside the bottom of the rocket tank, the mounting mechanism can be detachably mounted on the top of the supporting member.

[0018] According to one embodiment of the present invention, the support member includes a second support rod installed on the top of the base, and a first support rod is detachably installed on the second support rod. The top end of the first support rod is used to extend to the inside of the bottom of the rocket tank through a manhole. When the top end of the first support rod is located inside the bottom of the rocket tank, the mounting mechanism is detachably mounted on the top end of the first support rod.

[0019] According to one embodiment of the present invention, the mounting mechanism includes a support plate. When the top end of the first support rod is located inside the bottom of the rocket tank, the support plate can be detachably mounted on the top end of the first support rod. A plurality of mounting grooves are circumferentially provided on the top end of the support plate. A plurality of the standing mechanisms can be detachably mounted in the plurality of the mounting grooves in turn.

[0020] According to one embodiment of the present invention, the standing mechanism includes a mounting rod, one end of the mounting rod is detachably mounted in the mounting groove, the other end of the mounting rod is detachably mounted with a support frame, and the top end of the support frame is detachably mounted with a standing plate; the buffer layer is detachably mounted at one end of the support frame away from the support plate.

[0021] According to one embodiment of the present invention, the standing mechanism further includes a first connecting beam located between the mounting rod and the support frame, the first connecting beam is an L-shaped structure, and both ends of the first connecting beam are detachably connected to the mounting rod and the support frame respectively.

[0022] According to an embodiment of the present invention, a cover plate is detachably mounted on the top end of the support plate, and the top end of the mounting rod located in the mounting groove abuts against the bottom end of the cover plate.

[0023] According to an embodiment of the present invention, a second connecting beam is provided between any two adjacent supporting frames, the second connecting beam is an L-shaped structure, and both ends of the second connecting beam are detachably connected to the two adjacent supporting frames.

[0024] According to one embodiment of the present invention, a support rod is installed on the top side wall of the first support rod, and the support rod and the first support rod form an inverted right triangle structure. The top ends of the support rod and the first support rod are detachably connected to the bottom end of the support plate.

[0025] A second aspect of the present invention provides a method for installing a working platform inside a bottom of a rocket tank, comprising the following steps:

[0026] Step 1: Assemble the base, the second support rod and the first support rod, and install the support rod on the top of the first support rod to complete the assembly of the support mechanism;

[0027] Step 2: Install the support plate on the top of the first support rod and the support rod;

[0028] Step 3: Assemble the mounting rod, the first connecting beam, the support frame, the standing plate and the buffer layer to complete the assembly of the standing mechanism;

[0029] Step 4: Vertically hoist the bottom of the rocket tank;

[0030] Step 5: Extend the first support rod and the support plate through the manhole to the inside of the bottom of the rocket tank;

[0031] Step 6: transport the assembled standing mechanisms to the inside of the bottom of the rocket tank through the manhole, and install the mounting rods in the mounting grooves, while abutting the buffer layer against the side wall of one end of the melon slice located inside the bottom of the rocket tank;

[0032] Step 7: After completing step 6, install the cover plate on the support plate;

[0033] Step 8: After completing step 7, install the second connecting beam between every two adjacent support frames.

[0034] The present invention has at least the following technical effects:

[0035] Firstly, the present invention uses an integral working platform, which eliminates the need to place the bottom of the rocket tank horizontally, thereby reducing the floor space occupied by the bottom of the rocket tank.

[0036] Secondly, the working platform in the present invention can install internal support tooling and a back protective gas device inside the bottom of the rocket tank without using a ladder, and a buffer layer is also provided on the working platform, so that no pits will be squeezed on the inner wall of the bottom of the rocket tank, thereby ensuring the product quality of the rocket tank.

[0037] Then, the present invention can install the inner support tooling and the back protective gas device at any position in the 360° direction inside the bottom of the rocket tank by moving several standing mechanisms, thereby improving the work efficiency of installing the inner support tooling and the back protective gas device.

[0038] Finally, the present invention can form a triangular structure with the melon segments through the setting of the standing mechanism and the supporting mechanism, and avoids the use of ladders. Therefore, there will be no situation of sliding relative to the inner wall of the bottom of the rocket tank and falling, which reduces the danger and ensures safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 for Figure 1 A schematic diagram of the overall structure from another perspective;

[0042] Figure 3 for Figure 1 A partial enlarged view of the middle A;

[0043] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0044] Figure 5 for Figure 2 A partial enlarged view of point C in the middle;

[0045] Figure 6 for Figure 1 A partial enlarged view of point D in the middle;

[0046] Figure 7 for Figure 2 A partial enlarged view of point E in the middle;

[0047] Figure 8 It is a schematic diagram of the overall structure of the support plate in the present invention;

[0048] Fig. 9 It is a schematic diagram of the overall structure in which some mounting rods are mounted on the supporting plate in the present invention;

[0049] Fig.10 It is a schematic diagram of the overall structure of the standing mechanism in the present invention;

[0050] Fig.11 for Fig.10 A schematic diagram of the overall structure from another perspective;

[0051] Fig.12 It is a schematic diagram of the overall structure of the base in the present invention;

[0052] Fig.13 for Fig.12 A schematic diagram of the overall structure from another perspective;

[0053] Fig.14 It is a schematic diagram of the overall structure of the bottom of the rocket tank in the present invention;

[0054] Fig.15 This is a schematic diagram of the overall structure of the working platform of the present invention installed inside the bottom of a rocket tank;

[0055] Fig.16 for Fig.15 A schematic diagram of the overall structure from another perspective;

[0056] Among them, 1. standing board; 2. support frame; 3. first connecting beam; 4. mounting rod; 5. buffer layer; 6. cover plate; 7. support plate; 8. second connecting beam; 9. handle; 10. first supporting rod; 11. second supporting rod; 12. base; 13. mounting groove; 14. melon slice; 15. cone section; 16. top cover; 17. manhole; 18. support rod. DETAILED DESCRIPTION

[0057] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are used to illustrate the principles of the present invention, and are not configured to limit the present invention. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the sizes of some structural components or areas in the drawings may be enlarged for other structural components or areas to help understand the embodiments of the present invention.

[0058] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the present invention. In the description of the present invention, it should be noted that, unless otherwise specified, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0059] In addition, the terms "include", "comprise", "have" or any other variations thereof are intended to cover non-exclusive inclusion, so that a structure or component including a series of elements includes not only those elements, but also other mechanical elements that are not explicitly listed or inherent in the structure or component. In the absence of more restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the article or device including the elements.

[0060] Spatially related terms such as "below", "beneath", "under", "low", "above", "on", "high", etc. are used to facilitate description 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 orientations different from those shown in the figures. In addition, for example, "one element is above / below another element" can mean that the two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first", "second", etc. are also used to describe various elements, regions, parts, etc., and do not specifically refer to the meaning of order or sequence, and should not be regarded as limiting. Similar terms are used throughout the description to represent similar elements.

[0061] In the process of describing the present invention below, in certain scene descriptions, only "rocket", "launch vehicle", "spacecraft", "space launch vehicle" or "missile" may be used. This is only for the convenience of description, and its connotation is not limited to the specific words used. Generally, the launch vehicle of the present invention includes not only space launch vehicles and rockets used to carry satellites or spacecraft or other probes, but also various types of missiles, rockets and other weapons used to carry military payloads, as well as similar products that can send payloads into the air. When interpreting the above specific words, those skilled in the art shall not limit the launch vehicle to only one of the space launch vehicles, rockets or missiles based on the specific words used to describe the scene, thereby narrowing the scope of protection of the present invention.

[0062] For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by showing examples of the present invention.

[0063] In a first aspect of the present invention, a working platform inside a rocket tank bottom is provided. The rocket tank bottom provided by the present invention comprises a plurality of melon segments 14, a plurality of cone segments 15 and a top cover 16 having a disc-shaped structure, wherein the plurality of melon segments 14, the plurality of cone segments 15 and the top cover 16 are spliced ​​to form the rocket tank bottom.

[0064] In this embodiment, refer to Fig.14 A plurality of melon segments 14 and a plurality of cone segments 15 are respectively spliced ​​into a circular ring structure, and the cone segment 15 is spliced ​​at the bottom end of the melon segment 14, and the top cover 16 is spliced ​​at the bottom end of the cone segment 15 to form the bottom of the rocket tank. A manhole 17 is provided at the center of the top cover 16.

[0065] In this embodiment, refer to Figure 14-16, the number of melon segments 14 can be preferably sixteen, and the number of cone segments 15 can be preferably three. The manhole 17 can be preferably a through hole with a circular structure, and its diameter is not particularly limited, as long as it can ensure that the operator and various mechanisms in the working platform can pass smoothly. For example, the diameter of the manhole 17 can be preferably φ500mm. The manhole 17 can be used for the passage of the operator and various mechanisms in the working platform, so that the operator and various mechanisms in the working platform can enter and exit the interior of the bottom of the rocket tank.

[0066] The working platform provided by the present invention needs to be installed inside the bottom of the rocket tank for use, and includes a supporting mechanism, a mounting mechanism and a plurality of standing mechanisms, wherein:

[0067] Reference Fig.15 or Fig.16 The top of the support mechanism is used to extend to the inside of the bottom of the rocket tank through the manhole 17, and the mounting mechanism is detachably mounted on the top of the support mechanism, that is, when the top of the support mechanism is located inside the bottom of the rocket tank, the mounting mechanism will be located inside the bottom of the rocket tank as a whole. The detachable connection between the mounting mechanism and the support mechanism can preferably be a bolt connection known in the art.

[0068] Reference Figure 1 or Figure 3 , several standing mechanisms are detachably mounted on the mounting mechanism in turn along the circumference of the mounting mechanism. And the several standing mechanisms are all located inside the bottom of the rocket tank. Preferably, the several standing mechanisms can be evenly mounted on the mounting mechanism in turn at equal angles, that is, the angles between every two adjacent standing mechanisms and the center of the mounting mechanism are the same, so as to form a working platform with a "petal-like" structure. More preferably, with reference to Figure 1 , the number of standing mechanisms may preferably be eighteen.

[0069] Reference Figure 1 or Figure 2 A buffer layer 5 is installed at one end of the standing mechanism away from the mounting mechanism. Fig.15 The end of the buffer layer 5 is used to abut against the melon segment 14, that is, the end of the buffer layer 5 is abutted against the side wall of one end of the melon segment 14 located inside the bottom of the rocket tank, so that a sufficient buffering effect can be brought between the standing mechanism and the melon segment 14 to prevent the standing mechanism from scratching and pressing out pits on the melon segment 14, thereby ensuring the product quality of the rocket tank.

[0070] Preferably, the material of the buffer layer 5 may be a polyurethane material known in the art.

[0071] In this embodiment, refer to Figure 2 and Figure 5The contact surface between the melon segment 14 and the buffer layer 5 can preferably be an arc-shaped structure, so that it can be more closely attached to the side wall of the melon segment 14. The connection method between the buffer layer 5 and the mounting mechanism is not particularly limited, and the two can preferably be connected by three evenly distributed bolts. More preferably, referring to Figure 5 The buffer layer 5 may be provided with three buffer layer mounting holes along the length direction of the standing mechanism, and bolts are installed in the buffer layer mounting holes, thereby connecting the buffer layer 5 to the mounting mechanism. The heads of the bolts installed in the buffer layer mounting holes are located inside the buffer layer mounting holes, thereby preventing the bolts from directly contacting the melon segments 14, thereby preventing the bolts from scratching the melon segments 14 or pressing pits on the melon segments 14.

[0072] When it is necessary to install an inner support tooling and a back protective gas device inside the bottom of the rocket tank, the operator can stand on the standing mechanism through the setting of the standing mechanism, thereby installing the inner support tooling and the back protective gas device inside the bottom of the rocket tank.

[0073] When it is necessary to install internal support tooling and back protective gas devices at multiple locations inside the bottom of the rocket tank, the operator can move on several standing mechanisms to install the internal support tooling and back protective gas devices at any location in the 360° direction inside the bottom of the rocket tank, thereby improving the work efficiency of installing the internal support tooling and back protective gas devices.

[0074] Reference Fig.15 Since one end of the standing mechanism is mounted on the mounting mechanism and the other end thereof abuts against the inner wall of the arc-shaped melon segment 14 through the buffer layer, the standing mechanism, the melon segment 14 and the supporting mechanism form a triangular structure, which greatly improves the stability of the standing mechanism inside the bottom of the rocket tank. When the operator stands on the standing mechanism, the stable standing mechanism can effectively ensure the safety of the operator, avoid the operator falling due to looseness, and reduce the danger.

[0075] According to one embodiment of the present invention, referring to Figure 2 and Figure 7 The support mechanism includes a base 12, a support member is installed at the top of the base 12, and the top of the support member is used to extend to the inside of the bottom of the rocket tank through the manhole 17. When the top of the support member is located inside the bottom of the rocket tank, the mounting mechanism is detachably mounted on the top of the support member. Preferably, the support member includes a second support rod 11 installed at the top of the base 12, and the first support rod 10 is detachably mounted on the second support rod 11. Fig.16The top end of the first support rod 10 is used to extend to the inside of the bottom of the rocket tank through the manhole 17. When the top end of the first support rod 10 is located inside the bottom of the rocket tank, the mounting mechanism can be detachably mounted on the top end of the first support rod 10.

[0076] In this embodiment, refer to Figure 7 The first support rod 10 and the second support rod 11 may both be rectangular parallelepiped structures. The first support rod 10 may be mounted on the side wall of the second support rod 11 by a plurality of bolts evenly arranged along the length direction of the second support rod 11. The number of bolts evenly arranged along the length direction of the second support rod 11 may be three.

[0077] Further, refer to Figure 7 A gasket may be provided at the connection between the first support rod 10 and the second support rod 11 , so as to further ensure the connection stability between the first support rod 10 and the second support rod 11 .

[0078] Further, refer to Figure 7 Four reinforcing ribs are provided at the connection between the second support rod 11 and the base 12. The four reinforcing ribs are sequentially installed at the four surfaces of the second support rod 11 and can be installed between the second support rod 11 and the base 12 by welding. The reinforcing ribs can greatly improve the connection stability and firmness between the second support rod 11 and the base 12, thereby improving the overall safety of the working platform.

[0079] When it is necessary to adjust the height of the standing mechanism inside the bottom of the rocket tank, the bolts installed between the first support rod 10 and the second support rod 11 can be removed, and then the height of the first support rod 10 can be adjusted. The height of the mounting mechanism installed on the top of the first support rod 10 can be adjusted. Since the standing mechanism is installed on the mounting mechanism, the height of the standing mechanism can be adjusted.

[0080] After the adjustment is completed, since the bolts between the first support rod 10 and the second support rod 11 are evenly distributed, the bolt holes of the first support rod 10 and the screw holes opened on the second support rod 11 are also corresponding and connected respectively, so the bolts can be screwed back into the corresponding screw holes between the first support rod 10 and the second support rod 11 to achieve re-fixation of the first support rod 10 and the second support rod 11.

[0081] After the fixation is completed, the length of the standing mechanism is readjusted so that the buffer layer 5 is in contact with the side wall of the melon segment 14 again, thereby completing the adjustment of the height of the standing mechanism.

[0082] According to one embodiment of the present invention, referring to Figure 3 or Figure 4The mounting mechanism includes a support plate 7. When the top end of the first support rod 10 is located inside the bottom of the rocket tank, the support plate 7 can be detachably mounted on the top end of the first support rod 10, that is, the support plate 7 will also be located inside the bottom of the rocket tank at this time.

[0083] In this embodiment, refer to Figure 4 , Figure 8 and Fig. 9 , the support plate 7 may preferably have a circular structure.

[0084] According to one embodiment of the present invention, referring to Figure 8 and Fig. 9 The top of the support plate 7 is provided with a plurality of mounting grooves 13 along the circumferential direction. Fig. 9 , several standing mechanisms are detachably mounted in several mounting grooves 13 in sequence, thereby detachably connecting the standing mechanisms to the mounting grooves 13. Among them, since several standing mechanisms are evenly mounted on the mounting mechanism in sequence at equal angles, several mounting grooves 13 are also evenly arranged in sequence at equal angles on the support plate 7. Preferably, the number of mounting grooves 13 is also eighteen.

[0085] When it is necessary to install a standing mechanism on the support plate 7, the standing mechanism is embedded in the mounting groove 13 to complete the connection between the two without the need to use bolts or other connecting tools to connect the two. This greatly simplifies the overall disassembly and assembly of the working platform, improves the overall disassembly and assembly efficiency of the working platform, and reduces the labor cost of disassembling and assembling the working platform.

[0086] According to one embodiment of the present invention, referring to Fig.10 and Fig.11 The standing mechanism includes a mounting rod 4, one end of which is detachably mounted in the mounting groove 13.

[0087] In this embodiment, refer to Fig.10 and Fig.11 The mounting rod 4 may preferably have a rectangular parallelepiped structure, and since the mounting rod 4 is embedded in the mounting groove 13 , the inner shape of the mounting groove 13 may also be a rectangular parallelepiped structure that matches the mounting rod 4 .

[0088] According to one embodiment of the present invention, the other end of the mounting rod 4 is detachably mounted with a support frame 2, and the top of the support frame 2 is detachably mounted with a standing board 1. The buffer layer 5 is detachably mounted at one end of the support frame 2 away from the support plate 7.

[0089] In this embodiment, refer to Fig.11 , the support frame 2 may preferably have a hollow rectangular parallelepiped structure. Fig.10The shape of the standing board 1 can also be preferably a rectangular parallelepiped with the same width as the supporting frame 2, and can be detachably mounted on the top of the supporting frame 2 by bolts.

[0090] In this embodiment, the standing plate 1 can preferably be a thin steel plate, and the material can preferably be an aluminum alloy profile with lighter weight and higher strength, thereby increasing the overall strength of the standing mechanism and reducing the difficulty of disassembly and assembly of the entire working platform due to the lighter weight of the aluminum alloy profile.

[0091] According to one embodiment of the present invention, referring to Fig.10 The standing mechanism further includes a first connecting beam 3 located between the mounting rod 4 and the support frame 2. The first connecting beam 3 is a bent L-shaped structure (i.e., the vertical section is an L-shaped structure). The bending angle of the first connecting beam 3 can be preferably 90°. The two ends of the first connecting beam 3 are detachably connected to the mounting rod 4 and the support frame 2, respectively, that is, the mounting rod 4 is detachably connected to the support frame 2 through the first connecting beam 3.

[0092] In this embodiment, refer to Fig.10 The number of the first connection beams 3 may preferably be two, and they are symmetrically arranged on both sides of the mounting rod 4. The mounting rod 4 may be detachably connected to the first connection beam 3 by a plurality of bolts evenly arranged along the length direction of the first connection beam 3. Preferably, the number of the bolts arranged along the length direction of the first connection beam 3 may be three.

[0093] After adjusting the height of the standing mechanism, it is necessary to readjust the length of the standing mechanism so that the buffer layer 5 and the side wall of the melon slice 14 of the arc-shaped structure can be re-contacted. At this time, the bolts installed on the first connecting beam 3 and the mounting rod 4 can be loosened, and the relative positions of the first connecting beam 3 and the mounting rod 4 can be adjusted, so that the length of the standing mechanism can be adjusted according to actual conditions. The bolts installed on the first connecting beam 3 and the mounting rod 4 are evenly distributed, so the screw holes opened on the first connecting beam 3 and the mounting rod 4 are also corresponding and connected, so that the bolts can be screwed back into the corresponding screw holes between the first connecting beam 3 and the mounting rod 4 to achieve re-fixation of the first connecting beam 3 and the mounting rod 4 to complete the adjustment of the length of the standing mechanism.

[0094] According to one embodiment of the present invention, referring to Figure 3 A cover plate 6 is detachably mounted on the top of the support plate 7 , and the top end of the mounting rod 4 in the mounting groove 13 abuts against the bottom end of the cover plate 6 .

[0095] In this embodiment, refer to Figure 3The cover plate 6 and the support plate 7 can be detachably connected by four bolts. The shape of the cover plate 6 can be preferably the same as that of the support plate 7, and the cross-sectional area of ​​the cover plate 6 can be the same as that of the support plate 7, that is, the cover plate 6 can also be a circular structure having the same shape as that of the support plate 7 (refer to Fig.12 and Fig.13 ).

[0096] When the standing mechanism is installed on the support plate 7, the cover plate 6 can cover the mounting rod 4 embedded in the mounting groove 13, thereby making the mounting rod 4 more firmly installed on the support plate 7. That is, by setting the cover plate 6, the mounting rod 4 in the mounting groove 13 can be limited at the top, thereby preventing the mounting rod 4 from falling out of the mounting groove 13, further ensuring the safety of the operator and further reducing the danger.

[0097] In addition, in this embodiment, referring to Figure 3 , Fig.12 and Fig.13 Two opposite U-shaped holes may be provided on the cover plate 6 , the length of the U-shaped hole may preferably be the same as the length of the mounting groove 13 , and the width of the U-shaped hole may preferably be the same as the sum of the widths of any two adjacent mounting grooves 13 .

[0098] When the operator installs multiple standing mechanisms on the support plate 7, he can first install a standing mechanism on the support plate 7, stand on the standing board 1 of the standing mechanism, and then stand on the standing board 1 to install other standing mechanisms in sequence. Among them, the operator can preferentially install the standing mechanism in the mounting groove 13 other than the mounting groove 13 corresponding to the U-shaped hole, and after the installation is completed, the cover plate 6 can be covered on the support plate 7, thereby ensuring that the cover plate 6 presses the standing mechanism as soon as possible, avoiding the situation that the mounting rod 4 falls off from the mounting groove 13 during the installation process, and further ensuring the safety of the operator. Finally, the remaining standing mechanisms can be installed through the U-shaped hole of the cover plate 6 to complete the installation of the standing mechanism.

[0099] Further, refer to Figure 3 , a plurality of handles 9 are threadedly installed on the top of the cover plate 6. In the present embodiment, there are two types of handles 9, one of which can be in the shape of a Chinese character "J", and the other can be in a circular ring shape. Among them, the number of the Chinese character "J"-shaped handles 9 can be two, and they are symmetrically installed on the top of the cover plate 6 respectively. The number of the circular ring-shaped handles 9 can be four, and they are sequentially installed on the top of the cover plate 6 along the circumferential direction. The provision of the handles 9 can facilitate the operator to take the cover plate 6. At the same time, when the operator stands on the standing board 1 to install the inner support tooling and the back protective gas device, he can obtain better balance by grasping the handles 9, which further ensures the safety of the operator.

[0100] According to one embodiment of the present invention, referring to Figure 6 A second connecting beam 8 is provided between any two adjacent supporting frames 2 . The second connecting beam 8 is a bent L-shaped structure, and both ends of the second connecting beam 8 are detachably connected to the two adjacent supporting frames 2 .

[0101] In this embodiment, refer to Figure 6 The two ends of the second connecting beam 8 are detachably connected to two adjacent support frames 2 by a bolt respectively, and the bending angle of the second connecting beam 8 can preferably be 90°.

[0102] When the operator stands on the standing board 1, if the first connecting beam 3 or the mounting rod 4 of one of the standing mechanisms is broken, the operator will fall. However, by setting the second connecting beam 8, when the first connecting beam 3 or the mounting rod 4 of one of the standing mechanisms is broken, the second connecting beam 8 can firmly connect the support frame 2 of the broken standing mechanism with the support frames 2 of the standing mechanisms on both sides thereof, thereby preventing the operator from falling with the standing board 1, and further improving the overall safety of the working platform.

[0103] Furthermore, a reinforcing rib is provided at the bending center of the second connecting beam 8, thereby strengthening the bending resistance of the second connecting beam 8, further ensuring the overall structural strength of the working platform, and further improving the overall safety of the working platform.

[0104] According to one embodiment of the present invention, referring to Figure 2 and Figure 4 A support rod 18 is installed on the side wall of the top end of the first support rod 10 (i.e., the end close to the support plate 7). The support rod 18 and the first support rod 10 form an inverted right triangle structure. The top ends of the support rod 18 and the first support rod 10 are detachably connected to the bottom end of the support plate 7.

[0105] In this embodiment, refer to Figure 4 , the top end of the first support rod 10 can be a two-section structure, and the first support rods 10 of the two-section structure are perpendicular to each other and connected by welding. For the convenience of description, the first support rod 10 placed in the vertical direction in the two-section structure is called a vertical first support rod, and the first support rod 10 placed in the horizontal direction is called a horizontal first support rod. The bottom end of the support rod 18 can be welded to the side wall of the vertical first support rod, and the top end of the support rod 18 can be welded to the bottom end of the horizontal first support rod, thereby forming an inverted right triangle structure with the first support rod 10. Since the triangular structure has stability, the stability between the support mechanism and the mounting mechanism can be increased by setting the support rod 18, further improving the overall structural strength and safety of the working platform.

[0106] In this embodiment, refer to Figure 4 A hexagonal plate is detachably mounted on the bottom end of the support plate 7 by means of a plurality of bolts, and the bottom end of the hexagonal plate can be connected to the top end of the horizontal first support rod by welding, thereby detachably connecting the first support rod 10 to the support plate 7.

[0107] Furthermore, a bearing is installed between the top end of the hexagonal plate and the bottom end of the support plate 7, and the outer ring of the bearing can be connected to the support plate 7, and the inner ring of the bearing can be connected to the hexagonal plate, or the inner ring of the bearing can be connected to the support plate 7, and the outer ring of the bearing can be connected to the hexagonal plate, that is, the relative rotation of the support plate 7 and the hexagonal plate can be achieved, which is not particularly limited here. Among them, the bearing can preferably be a bearing with excellent axial load bearing performance, such as a thrust ball bearing or a tapered roller bearing known to those skilled in the art, which is not particularly limited here.

[0108] After the operator has installed the inner support tooling and the back protection gas device inside the bottom of the rocket tank, it is not necessary to disassemble the work platform inside the bottom of the rocket tank, and the welding work of the rocket tank barrel section can be carried out in the next step, which greatly reduces the labor cost and the production efficiency of the rocket tank. Among them, when the rocket tank barrel section is welded, the rocket tank barrel section needs to be rotated to perform circumferential seam welding, and through the setting of the bearing, the support plate 7 and the hexagonal plate can be rotated relative to each other. That is, during the rotation of the rocket tank barrel section, the rocket tank bottom will drive the components above the hexagonal plate to rotate synchronously, and the components below the hexagonal plate will remain relatively static (that is, the support mechanism will remain static), and then the rotation and circumferential seam welding of the rocket tank barrel section can be smoothly performed.

[0109] A second aspect of the present invention provides a method for installing a working platform inside a rocket tank bottom, comprising the following steps:

[0110] Step 1: The operator assembles and splices a plurality of melon segments 14, a plurality of cone segments 15 and a top cover 16, and opens a manhole 17 at the center of the top cover 16, thereby completing the installation of the bottom of the rocket tank.

[0111] Step 2: The operator assembles the base 12, the second support rod 11 and the first support rod 10 outside the bottom of the rocket tank, and installs the support rod 18 on the top of the first support rod 10 to complete the assembly of the support mechanism.

[0112] Step 3: The operator installs the hexagonal plate on the top of the first support rod 10 outside the bottom of the rocket tank, then installs the support plate 7 on the top of the first support rod 10 and the support rod 18 (i.e., the top of the hexagonal plate), and installs the bearing between the support plate 7 and the hexagonal plate to complete the assembly of the installation mechanism.

[0113] Step 4: The operator assembles the mounting rod 4, the two first connecting beams 3, the support frame 2, the standing plate 1 and the buffer layer 5 in order outside the bottom of the rocket tank to complete the assembly of the standing mechanism. In this embodiment, the number of standing mechanisms is eighteen, so the number of standing mechanisms that need to be assembled is also eighteen.

[0114] Step 5: Use an external crane (known in the art) to vertically lift the bottom of the rocket tank, and the manhole 17 will be located at the bottom of the bottom of the rocket tank.

[0115] Step six: Extend the top end of the first support rod 10 and the support plate 7 to the inside of the bottom of the rocket tank through the manhole 17, and adjust the height of the support plate 7 inside the bottom of the rocket tank according to actual installation needs, that is, adjust the height of the support plate 7 inside the bottom of the rocket tank by adjusting the connection position of the first support rod 10 and the second support rod 11.

[0116] Step six: One of the two operators enters the interior of the bottom of the rocket tank through the manhole 17. After entering, the operator outside the bottom of the rocket tank transports the assembled several standing mechanisms (eighteen in this embodiment) to the interior of the bottom of the rocket tank in sequence through the manhole 17. At this time, the operator inside the bottom of the rocket tank will receive the standing mechanism, and embed the mounting rods 4 of the several standing mechanisms in sequence in the several mounting grooves 13, and at the same time, abut the buffer layer 5 against the side wall of one end of the melon segment 14 located inside the bottom of the rocket tank. Thus, through the cooperation of the two operators, the installation of the standing mechanism can be quickly completed.

[0117] Step 7: After completing step 6, the operator inside the bottom of the rocket tank installs the cover plate 6 on the support plate 7 by bolts, and installs the handle 9 on the top of the cover plate 6.

[0118] Step 8: After completing step 7, the operator inside the bottom of the rocket tank installs the second connecting beam 8 on every two adjacent support frames 2 by bolts, thereby completing the complete installation of the working platform.

[0119] The above-mentioned embodiments of the present invention can be combined with each other and have corresponding technical effects.

[0120] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A working platform inside a rocket tank bottom, the rocket tank bottom comprising at least a melon wedge (14) and a manhole (17) opened on the rocket tank bottom; It is characterized in that The working platform comprises a supporting mechanism, a mounting mechanism and a plurality of standing mechanisms, wherein: One end of the support mechanism is used to extend to the inside of the bottom of the rocket tank through a manhole (17); when the one end of the support mechanism is located inside the bottom of the rocket tank, the mounting mechanism can be detachably mounted on the end of the support mechanism located inside the bottom of the rocket tank; A plurality of the standing mechanisms are detachably mounted on the mounting mechanism in sequence along the circumference of the mounting mechanism, and a buffer layer (5) is mounted on one end of the standing mechanism away from the mounting mechanism, and the end of the buffer layer (5) is used to abut against the side wall of one end of the melon segment (14) located inside the bottom of the rocket tank.

2. The working platform inside the bottom of the rocket tank according to claim 1, characterized in that: The support mechanism comprises a base (12), a support member is installed at the top end of the base (12), and the top end of the support member is used to extend to the inside of the bottom of the rocket tank through a manhole (17). When the top end of the support member is located inside the bottom of the rocket tank, the installation mechanism can be detachably installed on the top end of the support member.

3. The working platform inside the bottom of the rocket tank according to claim 2, characterized in that: The support member includes a second support rod (11) installed at the top end of the base (12), and a first support rod (10) is detachably installed on the second support rod (11). The top end of the first support rod (10) is used to extend to the inside of the bottom of the rocket tank through a manhole (17). When the top end of the first support rod (10) is located inside the bottom of the rocket tank, the mounting mechanism is detachably mounted on the top end of the first support rod (10).

4. The working platform inside the bottom of the rocket tank according to claim 3, characterized in that: The mounting mechanism comprises a support plate (7). When the top end of the first support rod (10) is located inside the bottom of the rocket tank, the support plate (7) can be detachably mounted on the top end of the first support rod (10). A plurality of mounting grooves (13) are circumferentially provided on the top end of the support plate (7). A plurality of the standing mechanisms can be detachably mounted in the plurality of mounting grooves (13) in turn.

5. The working platform inside the bottom of the rocket tank according to claim 4, characterized in that: The standing mechanism comprises a mounting rod (4), one end of the mounting rod (4) being detachably mounted in the mounting groove (13), the other end of the mounting rod (4) being detachably mounted with a support frame (2), the top end of the support frame (2) being detachably mounted with a standing plate (1); the buffer layer (5) being detachably mounted at one end of the support frame (2) away from the support plate (7).

6. The working platform inside the bottom of the rocket tank according to claim 5, characterized in that: The standing mechanism further comprises a first connecting beam (3) located between the mounting rod (4) and the support frame (2); the first connecting beam (3) is an L-shaped structure; two ends of the first connecting beam (3) are respectively detachably connected to the mounting rod (4) and the support frame (2).

7. The working platform inside the bottom of the rocket tank according to claim 5, characterized in that: A cover plate (6) is detachably mounted on the top end of the support plate (7), and the top end of the mounting rod (4) located in the mounting groove (13) abuts against the bottom end of the cover plate (6).

8. The working platform inside the bottom of the rocket tank according to claim 5, characterized in that: A second connecting beam (8) is provided between any two adjacent support frames (2); the second connecting beam (8) is an L-shaped structure, and both ends of the second connecting beam (8) are detachably connected to the two adjacent support frames (2).

9. The working platform inside the bottom of the rocket tank according to claim 4, characterized in that: A support rod (18) is installed on the top side wall of the first support rod (10), and the support rod (18) and the first support rod (10) form an inverted right triangle structure. The top ends of the support rod (18) and the first support rod (10) are detachably connected to the bottom end of the support plate (7).

10. The method for installing a working platform inside the bottom of a rocket tank according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Assemble the base (12), the second support rod (11) and the first support rod (10), and install the support rod (18) on the top of the first support rod (10) to complete the assembly of the support mechanism; Step 2: Install the support plate (7) on the top of the first support rod (10) and the support rod (18); Step 3: Assembling the mounting rod (4), the first connecting beam (3), the support frame (2), the standing plate (1) and the buffer layer (5) to complete the assembly of the standing mechanism; Step 4: Vertically hoist the bottom of the rocket tank; Step 5: Extend the first support rod (10) and the support plate (7) through the manhole (17) to the inside of the bottom of the rocket tank; Step 6: The assembled plurality of standing mechanisms are sequentially transported to the inside of the bottom of the rocket tank through the manhole (17), and the plurality of mounting rods (4) are sequentially installed in the plurality of mounting grooves (13), while the buffer layer (5) is abutted against the side wall of one end of the melon segment (14) located inside the bottom of the rocket tank; Step 7: After completing step 6, install the cover plate (6) on the support plate (7); Step 8: After completing step 7, install the second connecting beam (8) between every two adjacent support frames (2).

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