Work platform inside the bottom of a rocket tank

Abstract

This utility model discloses a working platform inside the bottom of a rocket propellant tank, relating to the field of rocket propellant tank technology. The working platform includes a support plate and a standing device mounted on the support plate. The standing device includes multiple mounting rods and a standing plate, with the mounting rods arranged in a circular array and hinged to the surface of the support plate. This utility model features a foldable standing device. In its folded state, the standing device can be inserted entirely into the bottom of the tank through a manhole, eliminating the need for manual delivery. It automatically unfolds after insertion, allowing for one-time installation and fixation, significantly shortening installation time and improving assembly efficiency. This addresses the shortcomings of existing technologies where the standing device requires two people to work together and install each segment individually. This not only demands high personnel coordination but also results in low installation efficiency due to the large number of segments and the limited internal space of the tank bottom, further exacerbating the installation inconvenience.

Description

Technical Field

[0001] This utility model relates to the field of rocket storage tank technology, specifically to a working platform inside the bottom of a rocket storage tank. Background Technology

[0002] Rocket propellant tanks, as the name suggests, are used to store the propellants that power the rocket (such as liquid oxygen, liquid hydrogen, liquid oxygen methane, etc.). Therefore, rocket propellant tanks are the rocket's "fuel depot," responsible for storing and transporting propellants. Simultaneously, rocket propellant tanks also serve as the rocket's main load-bearing structure, providing structural support. The working platform, a temporary platform located inside the rocket propellant tank, primarily provides a safe operating surface for personnel during rocket development, assembly, testing, and maintenance.

[0003] For example, patent CN119982257A discloses a working platform inside the bottom of a rocket propellant tank and its installation method. By setting up a standing mechanism and a support mechanism, it can form a triangular structure with the petals of the tube, and avoids the use of a ladder. Therefore, it will not slide relative to the inner wall of the rocket propellant tank bottom and fall, reducing the danger and ensuring safety.

[0004] In the existing technology, the standing device requires two people to cooperate and install each petal one by one during installation. This not only requires high personnel coordination, but also results in low installation efficiency due to the large number of petals and the need for one-by-one operation. In addition, the limited internal space at the bottom of the box further exacerbates the inconvenience of installation. Utility Model Content

[0005] This utility model provides a working platform inside the bottom of a rocket propellant tank, equipped with a foldable standing device. The folded standing device can be inserted into the bottom of the tank as a whole through the manhole, eliminating the need for manual delivery. After insertion, it can automatically unfold, thus completing the installation and fixing in one go. This significantly shortens the installation time and improves assembly efficiency. It solves the problem that in the prior art, the standing device requires two people to cooperate and install each segment one by one. This not only requires high personnel coordination, but also results in low installation efficiency due to the large number of segments and the need for manual operation. In addition, the limited space inside the tank further exacerbates the problem of inconvenience in installation.

[0006] To achieve a foldable standing device, the folded standing device can be inserted into the bottom of the tank as a whole through the manhole, eliminating the need for manual delivery and automatically unfolding upon entry, thus completing installation and fixing in one go, significantly shortening installation time and improving assembly efficiency. This utility model provides the following technical solution: A working platform inside the bottom of the rocket propellant tank includes a support plate and a standing device mounted on the support plate. The standing device includes multiple mounting rods and a standing plate. The mounting rods are arranged in a circular array and hinged to the surface of the support plate. The standing plate is foldably mounted on the surface of the mounting rods. A support tube is located at the bottom of the support plate. The support tube contains a folding device and an adjustment device. The folding device folds the mounting rods, and the adjustment device adjusts the height of the support tube. A drive switching device is located inside the support tube. When the drive switching device is at a high position, it drives the folding device; when the drive switching device is at a low position, it drives the adjustment device.

[0007] As a preferred embodiment of this utility model, the folding device includes a drive ring, a pull rod, and a transmission assembly. The transmission assembly is disposed inside the support tube, the drive ring is sleeved on the outside of the support tube, the drive ring is connected to the transmission assembly, the number of pull rods is adapted to the number of mounting rods, one end of the pull rod is hinged to the bottom surface of the mounting rod, and the other end of the mounting rod is hinged to the surface of the drive ring.

[0008] As a preferred technical solution of this utility model, the transmission assembly includes a first screw and a slider. The top end of the first screw is connected to the top of the inner side of the support tube through a bearing. The slider is threaded onto the surface of the first screw. The slider passes through the support tube through a strip groove and is fixedly connected to the inner side wall of the drive ring.

[0009] As a preferred embodiment of the present invention, the adjusting device includes a second screw and an adjusting frame. Both ends of the second screw are connected to the inner wall of the support tube through bearings. One end of the adjusting frame passes through the support tube through a through groove, and the other end of the adjusting frame is threaded onto the surface of the second screw.

[0010] As a preferred embodiment of this utility model, the drive switching device includes an electric push rod, a drive motor, and a transmission rod. The electric push rod is fixedly installed at the bottom of the support tube, and the telescopic shaft of the electric push rod is inserted into the support tube. The drive motor is fixedly installed on the surface of the telescopic shaft of the electric push rod via a bracket. One end of the transmission rod is fixedly connected to the output shaft of the drive motor. The transmission rod movably passes through the second screw. The transmission rod is connected to the first screw via a first connecting assembly, and the transmission rod is connected to the second screw via a second connecting assembly.

[0011] As a preferred embodiment of the present invention, the first connecting assembly includes a first fixed toothed disc and a first snap-fit ​​toothed disc. The first fixed toothed disc is fixedly connected to the bottom end of the first screw, and the first snap-fit ​​toothed disc is fixedly connected to the top end of the transmission rod. The first fixed toothed disc can mesh with the teeth of the first snap-fit ​​toothed disc.

[0012] As a preferred embodiment of the present invention, the second connecting component includes a second fixed toothed disc and a second snap-fit ​​toothed disc. The second fixed toothed disc is fixedly connected to the top end of the second screw, and the second snap-fit ​​toothed disc is fixedly sleeved on the surface of the transmission rod. The teeth of the second fixed toothed disc and the second snap-fit ​​toothed disc mesh.

[0013] As a preferred embodiment of this utility model, the standing plate includes a left standing plate and a right standing plate. The left standing plate and the right standing plate are respectively hinged to both sides of the mounting rod via hinge shafts. Torsion springs are provided at the hinge points of the left standing plate and the right standing plate and the mounting rod. The surface of the mounting rod is provided with fixing components for fixing the left standing plate and the right standing plate. Each left standing plate is connected to an adjacent right standing plate via a splicing component.

[0014] As a preferred embodiment of this utility model, the fixing component includes a sliding frame and a support rod. The sliding frame is slidably sleeved on the surface of the mounting rod, and the surface of the sliding frame is provided with fixing bolts. The support rod is fixedly disposed at both ends of the sliding frame, and the two support rods are respectively connected to the bottom of the left station plate and the right station plate.

[0015] As a preferred embodiment of this utility model, the splicing assembly includes a plug rod and a locking bolt. One end of the plug rod is disposed inside the left station plate through a placement groove, and the locking bolt is fixedly disposed at one end of the plug rod. The other end of the plug rod is inserted into the right station plate through a slot.

[0016] Compared with the prior art, this utility model provides a working platform inside the bottom of a rocket propellant tank, which has the following advantages:

[0017] The working platform inside the bottom of the rocket propellant tank features foldable mounting rods and standing plates. When folded, the rods and plates can be inserted into the tank as a whole through a manhole, eliminating the need for manual delivery. Once inside, the mounting plates automatically unfold via a folding device, completing the installation and fixing in one go. This significantly reduces installation time and improves assembly efficiency. It solves the problem of existing technologies where the standing device requires two people to work together and install each segment individually. This not only demands high levels of personnel coordination but also results in low installation efficiency due to the large number of segments and the limited space inside the tank. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the standing device of this utility model when it is unfolded;

[0020] Figure 3 This is a schematic diagram of the standing device of this utility model when folded;

[0021] Figure 4 This is a schematic diagram of the structure of the standing board of this utility model when folded;

[0022] Figure 5 This is a schematic diagram of the structure of the standing board of this utility model when it is unfolded;

[0023] Figure 6 This is a cross-sectional view of the support tube structure of this utility model;

[0024] Figure 7 This utility model Figure 6 Enlarged view of the structure at point A in the middle;

[0025] Figure 8 This utility model Figure 6 Enlarged view of the structure at point B in the middle.

[0026] In the diagram: 1. Support plate; 2. Mounting rod; 3. Standing plate; 301. Left standing plate; 302. Right standing plate; 4. Support tube; 5. Drive ring; 6. Pull rod; 7. First screw; 8. Slider; 9. Second screw; 10. Adjusting frame; 11. Electric push rod; 12. Drive motor; 13. Transmission rod; 14. First fixed gear plate; 15. First locking gear plate; 16. Second fixed gear plate; 17. Second locking gear plate; 18. Torsion spring; 19. Sliding frame; 20. Support rod; 21. Insert rod; 22. Locking bolt. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-8This utility model discloses a working platform inside the bottom of a rocket propellant tank, including a support plate 1 and a standing device mounted on the support plate 1. The standing device includes multiple mounting rods 2 and a standing plate 3. The mounting rods 2 are arranged in a circular array and hinged to the surface of the support plate 1. The standing plate 3 is foldably mounted on the surface of the mounting rods 2. A support tube 4 is provided at the bottom of the support plate 1. The support tube 4 is equipped with a folding device and an adjusting device. The folding device is used to fold the mounting rods 2, and the adjusting device is used to adjust the height of the support tube 4. A drive switching device is provided inside the support tube 4. When the drive switching device is at a high position, it is used to drive the folding device. When the drive switching device is at a low position, it is used to drive the adjusting device.

[0029] Specifically, the folding device includes a drive ring 5, a pull rod 6, and a transmission assembly. The transmission assembly is located inside the support tube 4, the drive ring 5 is sleeved on the outside of the support tube 4, the drive ring 5 is connected to the transmission assembly, the number of pull rods 6 is adapted to the number of mounting rods 2, one end of the pull rod 6 is hinged to the bottom surface of the mounting rod 2, and the other end of the mounting rod 2 is hinged to the surface of the drive ring 5.

[0030] Specifically, the transmission assembly includes a first screw 7 and a slider 8. The top end of the first screw 7 is connected to the inner top of the support tube 4 via a bearing. The slider 8 is threaded onto the surface of the first screw 7. The slider 8 passes through the support tube 4 via a strip groove and is fixedly connected to the inner wall of the drive ring 5.

[0031] In this embodiment, when the mounting rod 2 is unfolded, the first fixed gear plate 14 and the first snap-fit ​​gear plate 15 are engaged. Then, the drive motor 12 is started, and the output shaft of the drive motor 12 drives the transmission rod 13 to rotate. The transmission rod 13 drives the first screw 7 to rotate through the first fixed gear plate 14 and the first snap-fit ​​gear plate 15. The first screw 7 drives the slider 8 to slide along the strip groove on the support tube 4 through the thread. At the same time, the slider 8 drives the drive ring 5 to move downward. The drive ring 5 pulls the mounting rod 2 to rotate hingedly through multiple pull rods 6, so that multiple mounting rods 2 unfold by 90 degrees. At the same time, both ends of the pull rods 6 are hinged and rotated to tilt, so that the mounting rod 2 unfolds automatically.

[0032] Specifically, the adjustment device includes a second screw 9 and an adjustment frame 10. Both ends of the second screw 9 are connected to the inner wall of the support tube 4 through bearings. One end of the adjustment frame 10 passes through the support tube 4 through a through groove, and one end of the adjustment frame 10 is threaded onto the surface of the second screw 9.

[0033] In this embodiment, the transmission rod 13 is connected to the second screw 9 by a drive switching device. Then, the transmission rod 13 is driven to rotate by the drive motor 12. The transmission rod 13 drives the second screw 9 to rotate. The second screw 9 drives the adjustment frame 10 to move through the thread, thereby automatically adjusting the overall height of the support tube 4.

[0034] Specifically, the drive switching device includes an electric push rod 11, a drive motor 12, and a transmission rod 13. The electric push rod 11 is fixedly installed at the bottom of the support tube 4, and the telescopic shaft of the electric push rod 11 is inserted into the support tube 4. The drive motor 12 is fixedly installed on the surface of the telescopic shaft of the electric push rod 11 through a bracket. One end of the transmission rod 13 is fixedly connected to the output shaft of the drive motor 12. The transmission rod 13 movably passes through the second screw 9. The transmission rod 13 is connected to the first screw 7 through a first connecting assembly, and the transmission rod 13 is connected to the second screw 9 through a second connecting assembly.

[0035] Specifically, the first connecting assembly includes a first fixed gear plate 14 and a first snap-fit ​​gear plate 15. The first fixed gear plate 14 is fixedly connected to the bottom end of the first screw 7, and the first snap-fit ​​gear plate 15 is fixedly connected to the top end of the transmission rod 13. The first fixed gear plate 14 can mesh with the teeth of the first snap-fit ​​gear plate 15.

[0036] Specifically, the second connecting assembly includes a second fixed gear plate 16 and a second snap-fit ​​gear plate 17. The second fixed gear plate 16 is fixedly connected to the top end of the second screw 9, and the second snap-fit ​​gear plate 17 is fixedly sleeved on the surface of the transmission rod 13. The teeth of the second fixed gear plate 16 and the second snap-fit ​​gear plate 17 mesh.

[0037] In this embodiment, the telescopic shaft of the electric push rod 11 is extended. The telescopic shaft of the electric push rod 11 drives the transmission rod 13 to move upward through the drive motor 12, causing the transmission rod 13 to engage the teeth of the first engaging toothed disc 15 with the teeth of the first fixed toothed disc 14, thereby connecting the transmission rod 13 with the first screw 7 and driving the first screw 7 to rotate. The telescopic shaft of the electric push rod 11 is then retracted. The telescopic shaft of the electric push rod 11 drives the transmission rod 13 to move downward through the drive motor 12, causing the transmission rod 13 to disengage the first engaging toothed disc 15 from the first fixed toothed disc 14. Then, the teeth of the second engaging toothed disc 17 engage with the teeth of the second fixed toothed disc 16, thereby connecting the transmission rod 13 with the second screw 9 and driving the second screw 9 to rotate. Thus, a single drive motor 12 can drive the first screw 7 and the second screw 9 to rotate respectively.

[0038] Specifically, the standing plate 3 includes a left standing plate 301 and a right standing plate 302. The left standing plate 301 and the right standing plate 302 are respectively hinged to both sides of the mounting rod 2 via hinge shafts. Torsion springs 18 are provided at the hinge points of the left standing plate 301 and the right standing plate 302 and the mounting rod 2. The surface of the mounting rod 2 is provided with fixing components for fixing the left standing plate 301 and the right standing plate 302. Each left standing plate 301 is connected to an adjacent right standing plate 302 via splicing components.

[0039] Specifically, the fixing components include a sliding frame 19 and a support rod 20. The sliding frame 19 is slidably sleeved on the surface of the mounting rod 2. The surface of the sliding frame 19 is provided with fixing bolts. The support rod 20 is fixedly installed at both ends of the sliding frame 19. The two support rods 20 are respectively connected to the bottom of the left station plate 301 and the right station plate 302.

[0040] In this embodiment, after the left station plate 301 and the right station plate 302 are folded, the left station plate 301 and the right station plate 302 both drive the torsion spring 18 to elastically deform and stretch. Then, the sliding frame 19 drives the two support rods 20 to clamp the left station plate 301 and the right station plate 302 respectively, thereby fixing the left station plate 301 and the right station plate 302 when folded. After the left station plate 301 and the right station plate 302 are unfolded, the sliding frame 19 drives the two support rods 20 to contact the bottom of the left station plate 301 and the right station plate 302 respectively, thereby supporting and limiting the left station plate 301 and the right station plate 302.

[0041] Specifically, the splicing assembly includes a plug rod 21 and a locking bolt 22. One end of the plug rod 21 is placed inside the left station plate 301 through a placement slot, and the locking bolt 22 is fixedly placed at one end of the plug rod 21. The other end of the plug rod 21 is inserted into the right station plate 302 through a slot.

[0042] In this embodiment, after each left station plate 301 and right station plate 302 is unfolded, the insertion rod 21 placed in the slot of the left station plate 301 is pulled out by the locking bolt 22, so that the insertion rod 21 is inserted into the slot of the right station plate 302 on the adjacent mounting rod 2, thereby splicing and fixing each left station plate 301 and right station plate 302 together and improving the stability of the standing plate 3.

[0043] The working principle and usage process of this utility model are as follows: During use, the bottom of the rocket storage tank is vertically hoisted using an external crane, such as... Figure 3 As shown, the standing device is currently in a folded state. Afterwards, the standing device is inserted through the manhole at the bottom of the box. When the mounting rod 2 is unfolded, the first fixed gear plate 14 and the first engaging gear plate 15 are engaged. Then, the drive motor 12 is started, and its output shaft drives the transmission rod 13 to rotate. The transmission rod 13 drives the first screw 7 to rotate through the first fixed gear plate 14 and the first engaging gear plate 15. The first screw 7 drives the slider 8 to slide along the groove on the support tube 4 via its thread. Simultaneously, the slider 8 drives the drive ring 5 to move downwards. The drive ring 5 pulls the mounting rod 2 to rotate hingedly through multiple pull rods 6, causing the mounting rods 2 to unfold by 90 degrees. At the same time, both ends of the pull rods 6 are hinged and rotated, tilting the rods, thus automatically unfolding the mounting rods 2. Afterwards, the worker enters the bottom of the box through the manhole and stands on the support plate 1. Figure 4As shown, the standing plate 3 is in a folded state at this time. The support rod 20 clamps the left standing plate 301 and the right standing plate 302. Then, the sliding frame 19 is pulled away from the standing plate 3, so that the sliding frame 19 drives the two support rods 20 to disengage from the left standing plate 301 and the right standing plate 302. Then, under the elastic reset of the torsion spring 18, the left standing plate 301 and the right standing plate 302 are unfolded. Then, the sliding frame 19 is pushed back to its original position, and the sliding frame 19 drives the two support rods 20 to contact the bottom of the left standing plate 301 and the right standing plate 302 respectively, thereby supporting and limiting the left standing plate 301 and the right standing plate 302. Then, the fixing bolts on the sliding frame 19 are tightened to fix them. Through the above operation steps, each combat plate is unfolded, thereby completing the assembly of the working platform.

[0044] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A working platform inside the bottom of a rocket propellant tank, comprising a support plate (1) and a standing device mounted on the support plate (1), characterized in that: The standing device includes multiple mounting rods (2) and a standing plate (3). The multiple mounting rods (2) are hinged in a ring array on the surface of the support plate (1). The standing plate (3) is foldably disposed on the surface of the mounting rods (2). A support tube (4) is set at the bottom of the support plate (1). The support tube (4) is equipped with a folding device and an adjustment device. The folding device is used to fold the mounting rod (2), and the adjustment device is used to adjust the height of the support tube (4). The drive switching device installed in the support tube (4) is used to drive the folding device when the drive switching device is at a high position, and to drive the adjustment device when the drive switching device is at a low position.

2. The work platform inside a rocket tank bottom according to claim 1, characterized in that: The folding device includes a drive ring (5), a pull rod (6), and a transmission assembly. The transmission assembly is located inside the support tube (4). The drive ring (5) is sleeved on the outside of the support tube (4). The drive ring (5) is connected to the transmission assembly. The number of pull rods (6) is matched with the number of mounting rods (2). One end of the pull rod (6) is hinged to the bottom surface of the mounting rod (2), and the other end of the mounting rod (2) is hinged to the surface of the drive ring (5).

3. The work platform inside a rocket tank bottom according to claim 2, characterized in that: The transmission assembly includes a first screw (7) and a slider (8). The top end of the first screw (7) is connected to the inner top of the support tube (4) by a bearing. The slider (8) is threaded onto the surface of the first screw (7). The slider (8) passes through the support tube (4) through a strip groove and is fixedly connected to the inner wall of the drive ring (5).

4. The working platform inside the bottom of the rocket propellant tank according to claim 1, characterized in that: The adjustment device includes a second screw (9) and an adjustment frame (10). Both ends of the second screw (9) are connected to the inner wall of the support tube (4) through bearings. One end of the adjustment frame (10) passes through the support tube (4) through a through groove. One end of the adjustment frame (10) is threaded onto the surface of the second screw (9).

5. The work platform inside a rocket tank bottom according to claim 4, characterized in that: The drive switching device includes an electric push rod (11), a drive motor (12), and a transmission rod (13). The electric push rod (11) is fixedly installed at the bottom of the support tube (4). The telescopic shaft of the electric push rod (11) is inserted into the support tube (4). The drive motor (12) is fixedly installed on the surface of the telescopic shaft of the electric push rod (11) through a bracket. One end of the transmission rod (13) is fixedly connected to the output shaft of the drive motor (12). The transmission rod (13) movably passes through the second screw (9). The transmission rod (13) is connected to the first screw (7) through the first connecting assembly. The transmission rod (13) is connected to the second screw (9) through the second connecting assembly.

6. The work platform inside a rocket tank bottom of claim 5, wherein: The first connecting assembly includes a first fixed toothed disc (14) and a first snap-fit ​​toothed disc (15). The first fixed toothed disc (14) is fixedly connected to the bottom end of the first screw (7), and the first snap-fit ​​toothed disc (15) is fixedly connected to the top end of the transmission rod (13). The first fixed toothed disc (14) can mesh with the teeth of the first snap-fit ​​toothed disc (15).

7. The work platform inside a rocket tank bottom of claim 5, wherein: The second connecting assembly includes a second fixed toothed disc (16) and a second snap-fit ​​toothed disc (17). The second fixed toothed disc (16) is fixedly connected to the top end of the second screw (9), and the second snap-fit ​​toothed disc (17) is fixedly sleeved on the surface of the transmission rod (13). The teeth of the second fixed toothed disc (16) and the second snap-fit ​​toothed disc (17) mesh.

8. The work platform inside a rocket tank bottom of claim 1, wherein: The standing plate (3) includes a left standing plate (301) and a right standing plate (302). The left standing plate (301) and the right standing plate (302) are respectively hinged to both sides of the mounting rod (2) by hinge shafts. A torsion spring (18) is provided at the hinge joint between the left standing plate (301) and the right standing plate (302) and the mounting rod (2). The surface of the mounting rod (2) is provided with a fixing component for fixing the left standing plate (301) and the right standing plate (302). Each left standing plate (301) is connected to an adjacent right standing plate (302) by a splicing component.

9. The work platform inside a rocket tank bottom of claim 8, wherein: The fixing component includes a sliding frame (19) and a support rod (20). The sliding frame (19) is slidably sleeved on the surface of the mounting rod (2). The surface of the sliding frame (19) is provided with fixing bolts. The support rod (20) is fixedly installed at both ends of the sliding frame (19). The two support rods (20) are respectively connected to the bottom of the left station plate (301) and the right station plate (302).

10. The work platform inside a rocket tank bottom of claim 8, wherein: The splicing assembly includes a plug rod (21) and a locking bolt (22). One end of the plug rod (21) is placed inside the left station plate (301) through a placement slot. The locking bolt (22) is fixedly placed at one end of the plug rod (21). The other end of the plug rod (21) is inserted into the right station plate (302) through a slot.

Images