A working platform inside the bottom of a rocket tank and its installation method

Abstract

The present application relates to a kind of working platform inside rocket tank bottom and its installation method.The rocket tank bottom at least includes melon petal and manhole opened in rocket tank bottom.The working platform includes support mechanism, installation mechanism and several standing mechanisms, one end of support mechanism is used to extend to the inside of rocket tank bottom through manhole, when one end of support mechanism is located in the inside of rocket tank bottom, installation mechanism is detachably installed in one end of support mechanism located in the inside of rocket tank bottom;Several standing mechanisms are detachably installed on installation mechanism along the circumference of installation mechanism in sequence, the end of standing mechanism away from installation mechanism is installed with buffer layer, and the end of buffer layer is used to abut with the end wall of melon petal located in the inside of rocket tank bottom.The present application can reduce the floor area of rocket tank, ensure the product quality of rocket tank, increase work efficiency and reduce risk.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rocket tank, in particular to a working platform inside the bottom of a rocket tank and a mounting method thereof. BACKGROUND

[0002] A rocket tank, as its 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 warehouse" of the rocket, which undertakes the functions of storing and delivering 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 load generated during the launch and flight of the launch vehicle and provide sufficient support for the launch vehicle. Therefore, the rocket tank is an essential core component of the launch vehicle, which is very critical and important to the launch vehicle.

[0003] The rocket tank is usually composed of a cylinder segment, a bottom and a top, and the bottom is usually an elliptical thin-walled structure, which is mainly formed by splicing multiple melon seeds, cone segments and top covers. During the production of the rocket tank bottom, the welds (i.e. the gaps of splicing) of the rocket tank bottom need to be welded to complete the sealing of the rocket tank bottom.

[0004] At present, the welding method for the welds of the rocket tank bottom is usually to splice the multiple melon seeds, cone segments and top covers of the rocket tank bottom first, and then place the spliced rocket tank bottom in a horizontal position. Then the operator needs to enter the inside of the rocket tank bottom with a ladder and install an internal support tool and a back protection gas device inside the rocket tank bottom. Finally, welding is performed outside the rocket tank bottom.

[0005] However, the traditional welding method for the welds of the rocket tank bottom has many problems, for example:

[0006] 1. In order to reduce the risk of the operator working at a high place, the rocket tank bottom needs to be placed in a horizontal position, which greatly increases the floor area of the rocket tank bottom compared with vertical placement.

[0007] 2. When the operator installs the internal support tool and the back protection gas device inside the rocket tank bottom using the ladder, the ladder is likely to scratch the inner wall of the rocket tank bottom. Since the wall thickness of the rocket tank is relatively thin, the ladder is likely to extrude the inner wall of the rocket tank bottom and cause dents on the inner wall, thereby greatly reducing the product quality of the rocket tank.

[0008] 3. Since operators need to use ladders to install internal 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 the bottom of a rocket tank, wherein the bottom of the rocket tank comprises at least melon segments and a manhole opened on the bottom of the rocket tank.

[0014] The working platform includes a supporting mechanism, a mounting mechanism and several 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 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.

[0016] Several of the standing mechanisms are detachably mounted on the mounting mechanism in sequence along the circumference of the mounting mechanism. 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 support mechanism includes a base, and a support member is installed on the top of the base. The top of the support member is used to extend to the inside of the bottom of the rocket tank through a manhole. When the top of the support member is located inside the bottom of the rocket tank, the mounting mechanism can be detachably mounted on the top of the support member.

[0018] According to one embodiment of the present application, the support member comprises a second support rod mounted on the top end of the base, and a first support rod detachably mounted on the second support rod, the top end of the first support rod being used to extend into the interior of the bottom of the rocket tank through the manhole, and the mounting mechanism being detachably mounted on the top end of the first support rod when the top end of the first support rod is located in the interior of the bottom of the rocket tank.

[0019] According to one embodiment of the present application, the mounting mechanism comprises a support disc, the support disc being detachably mounted on the top end of the first support rod when the top end of the first support rod is located in the interior of the bottom of the rocket tank, and a plurality of mounting grooves being circumferentially formed on the top end of the support disc, and a plurality of the standing mechanisms being detachably mounted in the plurality of mounting grooves in sequence.

[0020] According to one embodiment of the present application, the standing mechanism comprises a mounting rod, one end of the mounting rod being detachably mounted in the mounting groove, and the other end of the mounting rod being detachably mounted with a support frame, and the top end of the support frame being detachably mounted with a standing plate; and the buffer layer being detachably mounted on the end of the support frame away from the support disc.

[0021] According to one embodiment of the present application, the standing mechanism further comprises a first connecting beam between the mounting rod and the support frame, the first connecting beam being in L-shaped structure, and the two ends of the first connecting beam being detachably connected with the mounting rod and the support frame, respectively.

[0022] According to one embodiment of the present application, the top end of the support disc is detachably mounted with a cover 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 one embodiment of the present application, a second connecting beam is arranged between any two adjacent support frames, the second connecting beam being in L-shaped structure, and the two ends of the second connecting beam being detachably connected with the two adjacent support frames, respectively.

[0024] According to one embodiment of the present application, a support rod is mounted on the side wall of the top end of the first support rod, the support rod and the first support rod forming an inverted right triangle structure, and the top end of the support rod and the top end of the first support rod being detachably connected with the bottom end of the support disc.

[0025] In the second aspect of the present application, a mounting method of a working platform in the interior of the bottom of a rocket tank is provided, comprising the following steps:

[0026] Step one: assembling the base, the second support rod and the first support rod, and mounting the support rod on the top end of the first support rod to complete the assembly of the support mechanism;

[0027] Step two: install the support disc on the top end of the first support rod and the support rod;

[0028] Step three: 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 four: vertically hoist the rocket tank bottom;

[0030] Step five: extend the first support rod and the support disc to the inside of the rocket tank bottom through the manhole;

[0031] Step six: transport the assembled standing mechanism through the manhole to the inside of the rocket tank bottom in sequence, and install the mounting rod in the mounting slot in sequence, and the buffer layer is in abutment with the side wall of the rocket tank bottom inside one end;

[0032] Step seven: install the cover plate on the support disc after step six is completed;

[0033] Step eight: install the second connecting beam between every two adjacent support frames after step seven is completed.

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

[0035] Firstly, the present application has a whole working platform, which does not need to place the rocket tank bottom horizontally, thereby reducing the floor area of the rocket tank bottom.

[0036] Secondly, the working platform in the present application can install the inside support tooling and the back protection gas device in the inside of the rocket tank bottom without using a ladder, and the buffer layer is also provided on the working platform, so that the inner wall of the rocket tank bottom is not extruded to form a pit, thereby ensuring the product quality of the rocket tank.

[0037] Then, the present application can install the inside support tooling and the back protection gas device at any position in the 360° direction inside the rocket tank bottom through the movement of the standing mechanism, thereby improving the working efficiency of installing the inside support tooling and the back protection gas device.

[0038] Finally, the present application can form a triangular structure with the melon piece through the setting of the standing mechanism and the support mechanism, and the use of the ladder is avoided, so that the situation of sliding against the inner wall of the rocket tank bottom and falling is avoided, the danger is reduced, and the safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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 any 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 point A in the middle;

[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 Schematic diagram of the overall structure of the support plate in the present invention;

[0048] Figure 9 This is a schematic diagram of the overall structure of the present invention in which some mounting rods are installed on the support plate;

[0049] Figure 10 Schematic diagram of the overall structure of the standing mechanism in the present invention;

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

[0051] Figure 12 Schematic diagram of the overall structure of the base in the present invention;

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

[0053] Figure 14 Schematic diagram of the overall structure of the rocket tank bottom in the present invention;

[0054] Figure 15 The overall structure schematic diagram of the work platform installed in the rocket tank bottom inside;

[0055] Figure 16 The overall structure schematic diagram of another perspective view of the Figure 15 The overall structure schematic diagram of another perspective view of the

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

[0057] In order to make the objectives, technical solutions and advantages of the present application clearer, the following will further describe the present application in detail with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application, for example, to illustrate the principles of the present application, and are not configured to limit the present application. In addition, the structural elements in the drawings are not necessarily drawn to scale. For example, the size of some structural elements in the drawings can be enlarged for other structural elements or regions to help understand the embodiments of the present application.

[0058] In the following description, the orientation words appearing in the description are the directions shown in the drawings, and are not limited to the specific structure of the embodiments of the present application. In the description of the present application, it should be noted that, unless otherwise specified, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] In addition, the terms "including", "containing", "having" or any other variant thereof are intended to cover non-exclusive inclusion, so that the inclusion of a series of element structures or components not only includes those elements, but also includes other elements not explicitly listed or inherent in the structure, component. Without more limitation, the elements defined by the statement "including" do not exclude the presence of other same elements in the article or device including the elements.

[0060] Spatially relative terms such as "under", "below", "lower", "above", "upper", "on", "over", "side", "top", "bottom", and the like can be used herein for ease of description to explain one element's position relative to another element as illustrated in the figures. The terms are intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or "under" other elements would then be oriented "above" the other elements or "over" the other elements. Similarly, if elements are turned over, elements described as "above" other elements or "over" other elements would then be oriented "below" the other elements or "under" the other elements. The terms "first", "second", "third", etc., are also used herein for ease of description of various elements, regions, parts, etc., and are in no way intended to refer to sequence or order of importance, unless specifically defined by context. Like terms are used to describe like elements throughout the description.

[0061] The present application can be implemented without some of these specific details, which are known to those skilled in the art. The following description of the embodiments is merely provided to give a better understanding of the present application by showing examples of the present application.

[0062] In a first aspect, the present application provides a working platform inside a rocket tank bottom. The rocket tank bottom provided by the present application comprises a plurality of melon pieces 14, a plurality of tapered segments 15, and a top cover 16 having a disc-like structure. The plurality of melon pieces 14, the plurality of tapered segments 15, and the top cover 16 are spliced to form the rocket tank bottom.

[0063] In this embodiment, referring to Figure 14 , the plurality of melon pieces 14 and the plurality of tapered segments 15 are each spliced into a ring structure, and the tapered segments 15 are spliced at the bottom end of the melon pieces 14, and the top cover 16 is spliced at the bottom end of the tapered segments 15 to form the rocket tank bottom. A manhole 17 is provided at the center of the top cover 16.

[0064] In this embodiment, referring to Figures 14-16 , the number of melon pieces 14 can be preferably sixteen, and the number of tapered segments 15 can be preferably three. The manhole 17 can be preferably a through hole having a circular structure, and the diameter thereof is not particularly limited, which can ensure that the operator and each mechanism in the working platform can pass through smoothly, for example, the diameter of the manhole 17 can be preferably φ500mm. The manhole 17 can be used for the operator and each mechanism in the working platform to pass through, so that the operator and each mechanism in the working platform can enter and exit the inside of the rocket tank bottom.

[0065] The working platform provided by the present application needs to be installed inside the rocket tank bottom for use, which comprises a supporting mechanism, a mounting mechanism, and a plurality of standing mechanisms, wherein:

[0066] Referring to Figure 15 or Figure 16The top end of the supporting mechanism is used to extend into the interior of the rocket tank bottom through the manhole 17, and the mounting mechanism is detachably mounted on the top end of the supporting mechanism, that is, when the top end of the supporting mechanism is located in the interior of the rocket tank bottom, the mounting mechanism is located in the interior of the rocket tank bottom as a whole. Preferably, the detachable connection manner of the mounting mechanism and the supporting mechanism can be bolt connection known in the art.

[0067] Referring to Figure 1 or Figure 3 The plurality of standing mechanisms are detachably mounted on the mounting mechanism in sequence along the circumference of the mounting mechanism. The plurality of standing mechanisms are located in the interior of the rocket tank bottom. Preferably, the plurality of standing mechanisms can be evenly mounted on the mounting mechanism in sequence at equal angles, that is, the included angle between every two adjacent standing mechanisms and the center position of the mounting mechanism is the same, so as to form a working platform similar to a "petal-shaped" structure. More preferably, referring to Figure 1 The number of the standing mechanisms can be preferably eighteen.

[0068] Referring to Figure 1 or Figure 2 The end of the standing mechanism away from the mounting mechanism is provided with a buffer layer 5. Referring to Figure 15 The end of the buffer layer 5 is used to abut against the melon petal 14, that is, the end of the buffer layer 5 abuts against the end side wall of the melon petal 14 located in the interior of the rocket tank bottom, so as to bring sufficient buffering effect between the standing mechanism and the melon petal 14, so as to prevent the standing mechanism from scratching and pressing out pits on the melon petal 14, and ensure the product quality of the rocket tank.

[0069] Preferably, the material of the buffer layer 5 can be polyurethane material known in the art.

[0070] In the embodiment, referring to Figure 2 and Figure 5 The contact surface of the melon petal 14 abutting against the buffer layer 5 can be preferably arc-shaped structure, so as to more closely abut against the side wall of the melon petal 14. The connection manner between the buffer layer 5 and the mounting mechanism is not particularly limited, and can be preferably connected by three uniformly distributed bolts. More preferably, referring to Figure 5 Three buffer layer mounting holes can be formed on the buffer layer 5 along the length direction of the standing mechanism, and the bolts are mounted in the buffer layer mounting holes, so as to connect the buffer layer 5 and the mounting mechanism. The head of the bolt mounted in the buffer layer mounting hole is located in the interior of the buffer layer mounting hole, so as to prevent the bolt from directly contacting the melon petal 14, and further avoid the bolt from scratching or pressing out pits on the melon petal 14.

[0071] When the inner support tool and the back protection gas device need to be installed inside the bottom of the rocket tank, the operator can stand on the standing mechanism, thereby installing the inner support tool and the back protection gas device inside the bottom of the rocket tank.

[0072] When the inner support tool and the back protection gas device need to be installed at multiple positions inside the bottom of the rocket tank, the operator moves on the standing mechanisms, thereby installing the inner support tool and the back protection gas device at any position in the 360° direction inside the bottom of the rocket tank, thereby improving the work efficiency of installing the inner support tool and the back protection gas device.

[0073] Referring to Figure 15 Since one end of the standing mechanism is installed on the mounting mechanism and the other end abuts against the inner wall of the arc-shaped melon slice 14 through the buffer layer, the standing mechanism, the melon slice 14 and the supporting mechanism form a triangle-like 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 and can avoid the situation that the operator falls due to looseness, thereby reducing the danger.

[0074] According to one embodiment of the present application, referring to Figure 2 and Figure 7 The supporting mechanism comprises a base 12, a supporting piece is installed at the top end of the base 12, the top end of the supporting piece is used to extend into the inside of the bottom of the rocket tank through the manhole 17, and the mounting mechanism is detachably installed at the top end of the supporting piece when the top end of the supporting piece is located inside the bottom of the rocket tank. Preferably, the supporting piece comprises a second supporting rod 11 installed at the top end of the base 12, and a first supporting rod 10 is detachably installed on the second supporting rod 11, referring to Figure 16 the top end of the first supporting rod 10 is used to extend into the inside of the bottom of the rocket tank through the manhole 17, and the mounting mechanism is detachably installed at the top end of the first supporting rod 10 when the top end of the first supporting rod 10 is located inside the bottom of the rocket tank.

[0075] In the embodiment, referring to Figure 7 the first supporting rod 10 and the second supporting rod 11 can both be cuboid structures. The first supporting rod 10 can be installed on the side wall of the second supporting rod 11 through a plurality of bolts arranged uniformly along the length direction of the second supporting rod 11. The number of the bolts arranged uniformly along the length direction of the second supporting rod 11 can be three.

[0076] Further, referring to Figure 7 a gasket can be arranged at the connection between the first supporting rod 10 and the second supporting rod 11, thereby further ensuring the connection stability between the first supporting rod 10 and the second supporting rod 11.

[0077] Further, referring to Figure 7 , four reinforcing ribs are arranged at the connection between the second support rod 11 and the base 12, and are sequentially arranged at the four surfaces of the second support rod 11 and are arranged between the second support rod 11 and the base 12 by welding. The reinforcing ribs can greatly improve the connection stability and firmness of the second support rod 11 and the base 12, and further improve the safety of the whole working platform.

[0078] When the height of the standing mechanism needs to be adjusted inside the rocket tank bottom, the bolts arranged between the first support rod 10 and the second support rod 11 are disassembled, and then the height of the first support rod 10 is adjusted, so that the height of the mounting mechanism arranged at the top end of the first support rod 10 is adjusted, and since the standing mechanism is arranged on the mounting mechanism, the height of the standing mechanism can be adjusted.

[0079] After the adjustment is completed, since the bolts between the first support rod 10 and the second support rod 11 are uniformly distributed, the bolt holes of the first support rod 10 and the bolt holes arranged on the second support rod 11 are respectively corresponding and communicated, so that the bolts can be screwed into the corresponding bolt holes between the first support rod 10 and the second support rod 11, and the first support rod 10 and the second support rod 11 are re-fixed.

[0080] After the fixing is completed, the length of the standing mechanism is adjusted again, so that the buffer layer 5 is in abutment with the side wall of the melon piece 14, and thus the adjustment of the height of the standing mechanism is completed.

[0081] According to an embodiment of the present application, referring to Figure 3 or Figure 4 , the mounting mechanism comprises a support disc 7, when the top end of the first support rod 10 is located inside the rocket tank bottom, the support disc 7 is detachably arranged at the top end of the first support rod 10, that is, at this time, the support disc 7 is also located inside the rocket tank bottom.

[0082] In the embodiment, referring to Figure 4 , Figure 8 and Figure 9 , the support disc 7 can be preferably circular in structure.

[0083] According to an embodiment of the present application, referring to Figure 8 and Figure 9 , a plurality of mounting grooves 13 are circumferentially arranged at the top end of the support disc 7, referring to Figure 9The standing mechanism is detachably installed in the mounting slot 13, thereby detachably connecting the standing mechanism and the mounting slot 13. Preferably, the number of the mounting slots 13 is also eighteen.

[0084] When the standing mechanism needs to be installed on the support disc 7, the standing mechanism is embedded in the mounting slot 13, thereby connecting the standing mechanism and the mounting slot 13 without using bolts or other connecting tools, which greatly simplifies the disassembly and assembly of the working platform, improves the disassembly and assembly efficiency of the working platform, and reduces the labor cost of disassembling and assembling the working platform.

[0085] According to an embodiment of the present application, referring to Figure 10 and Figure 11 , the standing mechanism comprises a mounting rod 4, one end of the mounting rod 4 being detachably installed in the mounting slot 13.

[0086] In the embodiment, referring to Figure 10 and Figure 11 , the mounting rod 4 can preferably have a cuboid structure. Since the mounting rod 4 is embedded in the mounting slot 13, the internal shape of the mounting slot 13 also has a cuboid structure matching the mounting rod 4.

[0087] According to an embodiment of the present application, the other end of the mounting rod 4 is detachably installed with a support frame 2, and the top end of the support frame 2 is detachably installed with a standing plate 1. A buffer layer 5 is detachably installed at the end of the support frame 2 away from the support disc 7.

[0088] In the embodiment, referring to Figure 11 , the support frame 2 can preferably have a hollow cuboid structure. Referring to Figure 10 , the shape of the standing plate 1 can also preferably be a cuboid with the same width as the support frame 2, and the standing plate 1 is detachably installed at the top end of the support frame 2 by means of bolts.

[0089] In the embodiment, the standing plate 1 can preferably be a thin steel plate, and the material can preferably be an aluminum alloy profile with light weight and high strength, thereby increasing the overall strength of the standing mechanism and reducing the disassembly difficulty of the working platform due to the light weight of the aluminum alloy profile.

[0090] According to an embodiment of the present application, referring to Figure 10The standing mechanism further comprises a first connecting beam 3 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), and the bending angle of the first connecting beam 3 can be preferably bent by 90°. The two ends of the first connecting beam 3 are respectively detachably connected with the mounting rod 4 and the support frame 2, that is, the mounting rod 4 is detachably connected with the support frame 2 through the first connecting beam 3.

[0091] In the embodiment, referring to Figure 10 , the number of the first connecting beam 3 can be preferably two, and is symmetrically arranged on both sides of the mounting rod 4. The mounting rod 4 can be detachably connected with the first connecting beam 3 through a plurality of bolts arranged uniformly along the length direction of the first connecting beam 3. Preferably, the number of the bolts arranged along the length direction of the first connecting beam 3 can be three.

[0092] After adjusting the height of the standing mechanism, the length of the standing mechanism needs to be adjusted again to make the buffer layer 5 re- abut against the side wall of the melon petal 14 of the arc-shaped structure. At this time, the bolts installed on the first connecting beam 3 and the mounting rod 4 can be loosened, and the relative position of the first connecting beam 3 and the mounting rod 4 is adjusted, so that the length of the standing mechanism can be adjusted according to the actual situation. The bolts installed on the first connecting beam 3 and the mounting rod 4 are uniformly distributed, so the screw holes on the first connecting beam 3 and the mounting rod 4 are also correspondingly communicated, so that the bolts can be re- screwed into the corresponding screw holes between the first connecting beam 3 and the mounting rod 4 to realize the re-fixing of the first connecting beam 3 and the mounting rod 4, so as to complete the length adjustment of the standing mechanism.

[0093] According to an embodiment of the present application, referring to Figure 3 , the top end of the support disc 7 is detachably installed with a cover plate 6, 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.

[0094] In the embodiment, referring to Figure 3 , the cover plate 6 and the support disc 7 can be detachably connected through four bolts. Among them, the shape of the cover plate 6 can be preferably the same as that of the support disc 7, and the cross-sectional area of the cover plate 6 can be the same as that of the support disc 7, that is, the cover plate 6 can also be a circular structure with the same as the support disc 7 (referring to Figure 12 and Figure 13 ).

[0095] When the standing mechanism is installed on the support disc 7, the cover plate 6 can cover the installation rod 4 embedded in the installation groove 13, and the installation rod 4 can be installed more firmly on the support disc 7. That is, through the setting of the cover plate 6, the installation rod 4 in the installation groove 13 can be limited from above, thereby avoiding the situation that the installation rod 4 falls off from the installation groove 13, further ensuring the safety of the operator, and further reducing the risk.

[0096] In addition, in the embodiment, referring to Figure 3 、 Figure 12 and Figure 13 , two opposite U-shaped holes can also be provided on the cover plate 6, the length of the U-shaped hole can be preferably the same as the length of the installation groove 13, and the width of the U-shaped hole can be preferably the same as the width of the sum of any two adjacent installation grooves 13.

[0097] When the operator installs multiple standing mechanisms on the support disc 7, the operator can first install a standing mechanism on the support disc 7 and stand on the standing plate 1 of the standing mechanism, and then install other standing mechanisms on the standing plate 1 in sequence. Among them, the operator can preferentially install the standing mechanism in the installation groove 13 corresponding to the U-shaped hole, and can cover the cover plate 6 on the support disc 7 after the installation is completed, so as to ensure that the cover plate 6 is pressed against the standing mechanism as soon as possible, thereby avoiding the situation that the installation rod 4 falls off from the installation groove 13 during the installation process, and further ensuring the safety of the operator. Finally, through the U-shaped hole of the cover plate 6, the remaining standing mechanisms can be installed to complete the installation of the standing mechanisms.

[0098] Further, referring to Figure 3 , a plurality of handles 9 are threadedly installed at the top end of the cover plate 6. In the embodiment, the types of the handles 9 are two, one is a few characters, and the other is a circular ring. Among them, the number of the few character handles 9 can be two and symmetrically installed at the top end of the cover plate 6. The number of the circular ring handles 9 can be four and sequentially installed at the top end of the cover plate 6 in the circumferential direction. Through the setting of the handles 9, the operator can conveniently hold the cover plate 6, and when the operator stands on the standing plate 1 to install the inner support tooling and the back protection gas device, the operator can hold the handles 9 to obtain better balance, and further ensure the safety of the operator.

[0099] According to an embodiment of the present application, referring to Figure 6 , a second connecting beam 8 is provided between any two adjacent support frames 2, the second connecting beam 8 is a bent L-shaped structure, and the two ends of the second connecting beam 8 are respectively detachably connected with the two adjacent support frames 2.

[0100] In the embodiment, referring to Figure 6The two ends of the second connecting beam 8 are detachably connected with the two adjacent support frames 2 through bolts respectively, and the bending angle of the second connecting beam 8 can be preferably 90°.

[0101] When the operator stands on the standing plate 1, if the first connecting beam 3 or the mounting rod 4 of one of the standing mechanisms breaks, the operator will fall. However, when the first connecting beam 3 or the mounting rod 4 of one of the standing mechanisms breaks, the second connecting beam 8 can stably connect the support frame 2 of the broken standing mechanism with the support frames 2 of the standing mechanisms on both sides, thereby preventing the operator from falling with the standing plate 1, and further improving the safety of the whole working platform.

[0102] Furthermore, a reinforcing rib is arranged at the bending center of the second connecting beam 8, so as to strengthen the bending resistance of the second connecting beam 8, further ensure the structural strength of the whole working platform, and further improve the safety of the whole working platform.

[0103] According to one embodiment of the present application, referring to Figure 2 and Figure 4 , a support rod 18 is arranged on the side wall of the top end (i.e. the end close to the support disc 7) of the first support rod 10, and the support rod 18 and the first support rod 10 form an inverted right triangle structure, and the top end of the support rod 18 and the top end of the first support rod 10 are detachably connected with the bottom end of the support disc 7.

[0104] In the embodiment, referring to Figure 4 , the top end of the first support rod 10 can be a two-section structure, and the two-section structure of the first support rod 10 is perpendicular to each other and connected through welding. For convenience of description, the first support rod 10 arranged in the vertical direction is referred to as a vertical first support rod, and the first support rod 10 arranged in the horizontal direction is referred to as a horizontal first support rod. The bottom end of the support rod 18 can be welded on the side wall of the vertical first support rod, and the top end of the support rod 18 can be welded on the bottom end of the horizontal first support rod, so as to form an inverted right triangle structure with the first support rod 10. Since the triangle structure has stability, the stability between the support mechanism and the mounting mechanism can be increased through the arrangement of the support rod 18, and the structural strength and safety of the whole working platform are further improved.

[0105] In the embodiment, referring to Figure 4 , the bottom end of the support disc 7 is detachably provided with a hexagonal plate through a plurality of bolts, and the bottom end of the hexagonal plate and the top end of the horizontal first support rod can be connected through welding, so as to detachably connect the first support rod 10 with the support disc 7.

[0106] Further, a bearing is installed between the top end of the hexagonal plate and the bottom end of the support disc 7, the outer ring of the bearing can be connected with the support disc 7, the inner ring of the bearing can be connected with the hexagonal plate, or the inner ring of the bearing can be connected with the support disc 7, and the outer ring of the bearing can be connected with the hexagonal plate, that is, the relative rotation of the support disc 7 and the hexagonal plate can be realized, 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.

[0107] When the operator installs the inner support tool and the back protection gas device in the interior of the rocket tank bottom, the work platform does not need to be disassembled in the interior of the rocket tank bottom, and the next step of welding the rocket tank cylinder segment can be performed, which greatly reduces the labor cost and the production efficiency of the rocket tank. When the rocket tank cylinder segment is welded, the rocket tank cylinder segment needs to be rotated for girth welding, and the support disc 7 and the hexagonal plate can be rotated relative to each other through the bearing. That is, during the rotation of the rocket tank cylinder segment, the components above the hexagonal plate will rotate synchronously with the rocket tank bottom, and the components below the hexagonal plate will remain relatively stationary (that is, the support mechanism will remain stationary), thereby facilitating the rotation and girth welding of the rocket tank cylinder segment.

[0108] In a second aspect, the application provides a method for installing a work platform in the interior of a rocket tank bottom, comprising the following steps:

[0109] Step one: the operator assembles and splices the plurality of melon pieces 14, the plurality of tapered segments 15 and the top cover 16, and opens a manhole 17 at the center position of the top cover 16, thereby completing the installation of the rocket tank bottom.

[0110] Step two: the operator assembles the base 12, the second support rod 11 and the first support rod 10 outside the rocket tank bottom, and installs the support rod 18 at the top end of the first support rod 10 to complete the assembly of the support mechanism.

[0111] Step three: the operator installs the hexagonal plate at the top end of the first support rod 10 outside the rocket tank bottom, then installs the support disc 7 at the top end of the first support rod 10 and the support rod 18 (i.e. the top end of the hexagonal plate), and installs a bearing between the support disc 7 and the hexagonal plate to complete the assembly of the installation mechanism.

[0112] Step four: 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 sequence outside the bottom of the rocket tank, so as to complete the assembly of the standing mechanism. In this embodiment, the number of the standing mechanism is eighteen, so the number of the standing mechanism to be assembled is also eighteen.

[0113] Step five: the rocket tank bottom is vertically hoisted by using an external crane (known in the art), and at this time, the manhole 17 is located at the bottom of the rocket tank bottom.

[0114] Step six: the top end of the first support rod 10 and the support disc 7 are extended to the inside of the rocket tank bottom through the manhole 17, and the height of the support disc 7 in the inside of the rocket tank bottom is adjusted according to the actual installation needs, that is, the height of the support disc 7 in the inside of the rocket tank bottom is adjusted by adjusting the connection position of the first support rod 10 and the second support rod 11.

[0115] Step six: one of the two operators enters the inside of the rocket tank bottom through the manhole 17, and after entering, the operator outside the rocket tank bottom transports the several assembled standing mechanisms (eighteen in this embodiment) into the inside of the rocket tank bottom through the manhole 17, at this time, the operator in the inside of the rocket tank bottom receives the standing mechanisms, and embeds the mounting rod 4 of the several standing mechanisms into the mounting groove 13 in sequence, and abuts the buffer layer 5 with the one end side wall of the melon piece 14 in the inside of the rocket tank bottom, so that the installation of the standing mechanism is completed quickly through the cooperation of the two operators.

[0116] Step seven: after step six is completed, the operator in the inside of the rocket tank bottom installs the cover plate 6 on the support disc 7 through bolts, and installs the handle 9 on the top end of the cover plate 6.

[0117] Step eight: after step seven is completed, the operator in the inside of the rocket tank bottom installs the second connecting beam 8 on each two adjacent support frames 2 through bolts, so as to complete the complete installation of the working platform.

[0118] The above embodiments of the present application can be combined with each other, and have corresponding technical effects.

[0119] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A 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 includes a supporting mechanism, a mounting mechanism and several 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 is 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, 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; The support mechanism comprises a base (12), and a support member is mounted on the top end of the base (12); The support member includes a second support rod (11) mounted on the top end of the base (12); a first support rod (10) is detachably mounted 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); The 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) is detachably mounted on the top end of the first support rod (10). The top end of the support plate (7) is provided with a plurality of mounting grooves (13) along the circumferential direction. The plurality of standing mechanisms are sequentially detachably mounted in the plurality of mounting grooves (13). A hexagonal plate is installed at the top end of the first support rod (10), the support disc (7) is installed at the top end of the hexagonal plate, and a bearing is installed between the support disc (7) and the hexagonal plate to achieve relative rotation between the support disc (7) and the hexagonal plate.

2. The working platform inside the bottom of the rocket tank according to claim 1, 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), and 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).

3. The working platform inside the bottom of the rocket tank according to claim 2, 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, and the two ends of the first connecting beam (3) are detachably connected to the mounting rod (4) and the support frame (2), respectively.

4. The working platform inside the bottom of the rocket tank according to claim 2, 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).

5. The working platform inside the bottom of the rocket tank according to claim 2, 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).

6. The working platform inside the bottom of the rocket tank according to claim 1, characterized in that: A support rod (18) is mounted 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).

Images