A telescoping rocket recovery tower

Abstract

The application discloses a telescopic rocket recovery tower and relates to the technical field of rocket recovery, aiming to solve the problem that the prior art cannot be flexibly adjusted according to the height requirements of different models of rockets and can only be adapted to single or a few rockets of the same height specification. The device comprises a primary tower, a secondary tower, a main hydraulic lifting driving mechanism, a transverse hydraulic driving mechanism, a mechanical arm and a control assembly. The main hydraulic lifting driving mechanism is installed in the middle of the primary tower base, the telescopic end of the main hydraulic lifting driving mechanism is provided with multiple layers of transverse hydraulic driving mechanisms in the circumferential direction, and the telescopic end of the transverse hydraulic driving mechanism is connected with the secondary tower. The height of the secondary tower is coarsely adjusted through the main hydraulic lifting driving mechanism, the width of the tower is adjusted through the transverse hydraulic driving mechanism, the recovery requirements of different models of rockets can be flexibly adapted, and the device has the advantages of stable structure, high adjustment precision, high automation degree and wide adaptation range.

Description

Technical Field

[0001] This invention belongs to the field of rocket recovery technology, specifically, it relates to a telescopic rocket recovery tower. Background Technology

[0002] Currently, research on rocket recovery devices mainly focuses on the structural stability, cushioning effect, and component reusability of the recovery rack. For example: Patent application CN202511404313.8 discloses a mobile capture and recovery system for medium and large liquid-fueled launch vehicles. This system uses a fixed-size recovery rack in conjunction with a buffer assembly to achieve vertical landing of the rocket, effectively absorbing landing impact and improving structural stability. However, the recovery rack is designed at a fixed height and cannot be adjusted to suit the height requirements of different rocket models. It can only accommodate a single or a few rockets of the same height, resulting in poor adaptability, high manufacturing costs, and correspondingly increased storage, replacement, and maintenance costs.

[0003] Patent application CN202511420276.X discloses an omnidirectional transfer device for the vertical recovery of rocket bodies. It optimizes the bottom load-bearing structure of the recovery rack, employs a multi-leg layout to enhance load-bearing capacity, and incorporates an attitude calibration component to make minor corrections to the rocket's landing attitude. However, this solution also uses a fixed-height design without a height adjustment mechanism. Different rocket models require separately designed and manufactured recovery racks of corresponding heights, resulting in resource waste. Furthermore, the disassembly and assembly process is cumbersome when changing between different rockets, reducing the efficiency of recovery operations.

[0004] Patent application CN202610166725.0 discloses a reusable launch vehicle ground active recovery system and recovery method. It adopts a modular splicing design, enabling the reuse of some components and optimizing the landing buffer mechanism to extend the service life of the recovery frame. However, its modular splicing only applies to the frame's load-bearing and landing buffer mechanisms; the height remains a fixed design and cannot be flexibly adjusted. To adapt to rockets of different heights, frame modules of different heights still need to be replaced, essentially remaining a form of mass customization. This does not fundamentally reduce production and usage costs, and module replacement requires professional personnel, increasing labor costs.

[0005] Therefore, as summarized above, existing technologies all focus on optimizing the structural stability, cushioning effect, and component reusability of rocket recovery racks. However, they all adopt a fixed-height design approach, lacking an effective height adjustment mechanism. This prevents flexible adjustments based on the height requirements of different rocket models, limiting compatibility to only one or a few rockets of the same height. In actual aerospace engineering, the height differences between different launch vehicles and rocket body configurations are significant, ranging from a few meters to tens of meters. Existing technologies require mass production of customized recovery racks for rockets of different heights, which not only greatly increases manufacturing costs but also leads to high costs for storage, transportation, replacement, and maintenance. Furthermore, the process of disassembling and replacing customized recovery racks is cumbersome, reducing the overall efficiency of rocket recovery operations. To improve the adaptability of rocket recovery devices, fundamentally reduce production and usage costs, and improve recovery operation efficiency, it is necessary to design a rocket recovery device that allows for flexible height adjustment. Summary of the Invention

[0006] In order to overcome the above-mentioned technical problems, the purpose of this invention is to provide a telescopic rocket recovery tower.

[0007] The objective of this invention can be achieved through the following technical solutions: A telescopic rocket recovery tower includes a primary tower, whose columns are connected by connecting columns. A main hydraulic lifting drive mechanism is fixedly installed at the center of the base of the primary tower. The telescopic end of the main hydraulic lifting drive mechanism is provided with multiple layers, each layer including multiple sets of transverse hydraulic drive mechanisms arranged in a circumferential array. The multiple layers of transverse hydraulic drive mechanisms are arranged in layers along the axial direction of the main hydraulic lifting drive mechanism. The telescopic ends of the transverse hydraulic drive mechanisms are connected to a secondary tower. The first-stage tower has a longitudinal guide groove on its column, and the second-stage tower is nested inside the first-stage tower and can be raised and lowered along the longitudinal guide groove. The inner side of the top of the first-stage tower column is provided with a first L-shaped slot, and the outer side of the bottom and top of the second-stage tower column are provided with a second L-shaped slot and a third L-shaped slot, respectively. The first L-shaped slot and the second L-shaped slot cooperate with each other, and a first pressure detection buffer component is provided in the first L-shaped slot. The top of the secondary tower is provided with a top seat, which is fixedly connected to the top of the telescopic part of the main hydraulic lifting drive mechanism via a connecting rod. A top limiting seat is fixedly installed at the bottom of the top seat. A fourth L-shaped slot is provided on the inner side of the top limiting seat. The third L-shaped slot and the fourth L-shaped slot cooperate with each other, and a second pressure detection buffer component is provided in the fourth L-shaped slot.

[0008] As a preferred embodiment of the present invention, the transverse hydraulic drive mechanism is connected to the main hydraulic lifting drive mechanism via a first fixed base.

[0009] As a preferred embodiment of the present invention, the telescopic end of the main hydraulic lifting drive mechanism is equipped with telescopic limit rods arranged in a circular array. The telescopic limit rods are distributed in a one-to-one correspondence with the transverse hydraulic drive mechanism, and the telescopic limit rods are connected to the telescopic end of the main hydraulic lifting drive mechanism through a second fixed seat.

[0010] As a preferred embodiment of the present invention, auxiliary hydraulic lifting drive mechanisms are fixedly installed at the four corners of the base of the primary tower, and the telescopic ends of the auxiliary hydraulic lifting drive mechanisms are fixedly installed with support plates.

[0011] As a preferred embodiment of the present invention, the first pressure detection buffer assembly includes a first side groove, a first pressure sensor, a first movable block, a first spring, and a first outer plate; The first side groove is formed at the first L-shaped slot position of the first stage tower column. The first pressure sensor is fixedly installed on the inner wall of the first side groove. The first movable block is slidably connected to the inside of the first side groove. The first spring is fixedly installed on one side of the first movable block. The first outer plate is fixedly installed on one end of the first spring.

[0012] As a preferred embodiment of the present invention, the second pressure detection buffer assembly includes a second side groove, a second pressure sensor, a second movable block, a second spring, and a second outer plate; The second side groove is formed at the fourth L-shaped slot position of the top limiting seat. The second pressure sensor is fixedly installed on the inner wall of the second side groove. The second movable block is slidably connected to the inside of the second side groove. The second spring is fixedly installed on one side of the second movable block. The second outer plate is fixedly installed on one end of the second spring.

[0013] As a preferred embodiment of the present invention, it further includes a control component, which includes a controller and a hydraulic control valve group; the signal input terminal of the controller is electrically connected to the first pressure sensor and the second pressure sensor respectively, and the control output terminal of the controller is electrically connected to the solenoid valve of the hydraulic control valve group; each working oil port of the hydraulic control valve group is respectively connected to the inlet and outlet oil circuits of the main hydraulic lifting drive mechanism, the lateral hydraulic drive mechanism and the auxiliary hydraulic lifting drive mechanism.

[0014] As a preferred embodiment of the present invention, the telescopic limiting rod is an adjustable hydraulic damping rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In this invention, a main hydraulic lifting drive mechanism is used in conjunction with a multi-layered transverse hydraulic drive mechanism arranged along its extension direction. The main hydraulic lifting drive mechanism performs a coarse adjustment of the secondary tower, while the multi-layered transverse hydraulic drive mechanisms simultaneously push the secondary tower to unfold, allowing the overall height of the recovery device to be continuously adjusted within a wide range. One set of devices can be adapted to various rocket models of different heights, eliminating the need for mass production of customized recovery racks for different rockets. This significantly reduces manufacturing, warehousing, transportation, and replacement / maintenance costs, and improves the efficiency of recovery operations.

[0016] 2. In this invention, the first L-shaped slot on the inner side of the top of the first-stage tower engages with the second L-shaped slot on the outer side of the bottom of the second-stage tower, and the third L-shaped slot on the outer side of the top of the second-stage tower engages with the fourth L-shaped slot on the inner side of the top limiting seat. When the second-stage tower is adjusted to its highest point, a double locking structure is formed, effectively preventing accidental slippage. Each L-shaped slot is equipped with a pressure detection and buffer component, which can detect the position pressure in real time and provide a locking signal, and also provide elastic buffering during rocket landing to absorb impact energy, significantly improving the structural stability and safety of the device during the adjustment and landing processes.

[0017] 3. In this invention, multiple sets of transverse hydraulic drive mechanisms are arranged along the extension and retraction direction of the main hydraulic lifting drive mechanism, with each layer distributed in a circumferential array. This allows for the uniform pushing of all parts of the secondary tower, avoiding eccentric loading. In conjunction with the telescopic limit rod, auxiliary support is provided, further enhancing the bending resistance of the secondary tower after extension, ensuring overall force balance, and extending the service life of the device.

[0018] 4. In this invention, auxiliary hydraulic lifting drive mechanisms are installed at the four corners of the first-stage tower base, and the telescopic ends are fixed with support plates, which can provide support for the second-stage tower during its ascent, ensuring its smooth lifting and descent, and can also provide a load-bearing capacity when recovering the rocket, thereby improving the stability of the entire device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention; Figure 2 This is a second three-dimensional structural schematic diagram of the present invention; Figure 3 This is an enlarged cross-sectional view at point A of the present invention; Figure 4 This is an enlarged cross-sectional view at point B of the present invention; Figure 5 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure label: 1. Primary tower; 2. Connecting column; 3. Main hydraulic lifting drive mechanism; 4. First fixed seat; 5. Lateral hydraulic drive mechanism; 6. Secondary tower; 7. Second fixed seat; 8. Telescopic limit rod; 9. Top seat; 10. Auxiliary hydraulic lifting drive mechanism; 11. Support plate; 12. First side groove; 13. First pressure sensor; 14. First movable block; 15. First spring; 16. First outer plate; 17. Top limit seat; 18. Second side groove; 19. Second pressure sensor; 20. Second movable block; 21. Second spring; 22. Second outer plate. Detailed Implementation

[0022] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention: Example: Please refer to Figure 1 , 2 and Figure 5 According to an embodiment of the present invention, a telescopic rocket recovery tower includes a primary tower 1, wherein the columns of the primary tower 1 are fixedly connected by connecting columns 2 to form a stable lower support frame.

[0023] Please see Figure 1 , 2 and Figure 5 A main hydraulic lifting drive mechanism 3 is fixedly installed at the center of the base of the first-stage tower 1. The telescopic end (i.e., the piston rod end) of the main hydraulic lifting drive mechanism 3 extends vertically upward. In this embodiment, the main hydraulic lifting drive mechanism 3 is a hydraulic cylinder. A series of transverse hydraulic drive mechanisms 5 arranged in a circular array are fixedly installed on the telescopic end of the main hydraulic lifting drive mechanism 3 via multiple first fixed seats 4. Multiple sets (i.e., multiple layers) of transverse hydraulic drive mechanisms 5 are arranged along the telescopic direction of the main hydraulic lifting drive mechanism 3, with each layer including multiple transverse hydraulic drive mechanisms 5 arranged in a circular array. In this embodiment, three layers are provided, with four mechanisms in each layer. The telescopic end of the transverse hydraulic drive mechanism 5 extends horizontally outward and is connected to the second-stage tower 6.

[0024] In this embodiment, the main body of the first-stage tower 1 is made of high-strength steel. The first-stage tower 1 is fixed to the foundation of the land launch site recovery position. The tower column of the first-stage tower 1 is provided with a longitudinal guide slide. The second-stage tower 6 is nested inside the first-stage tower 1 and is connected by the main hydraulic lifting drive mechanism 3 to ensure smooth lifting without swaying.

[0025] In this embodiment, the transverse hydraulic drive mechanism 5 adopts a hydraulic cylinder driven by an external small hydraulic pump, and is equipped with multiple symmetrically arranged transverse hydraulic rods.

[0026] Please see Figure 1-2 Each column of the first-stage tower 1 has a first L-shaped slot on its inner side at the top, each column of the second-stage tower 6 has a second L-shaped slot on its outer side at the bottom, and each column of the second-stage tower 6 has a third L-shaped slot on its outer side at the top. The first and second L-shaped slots are complementary in shape and engage when the second-stage tower 6 is raised to its position. A first pressure detection buffer assembly is installed inside the first L-shaped slot.

[0027] Please see Figure 1-2 Similarly, a top seat 9 is provided at the top of the secondary tower 6. The top seat 9 is fixedly connected to the top of the telescopic end of the main hydraulic lifting drive mechanism 3 via a connecting rod (or connecting rod), so that the top seat 9 rises and falls synchronously with the telescopic end of the main hydraulic lifting drive mechanism 3. A top limiting seat 17 is fixedly installed at the bottom of the top seat 9. A fourth L-shaped slot is provided on the inner side of the top limiting seat 17. This fourth L-shaped slot cooperates with the third L-shaped slot at the top of the secondary tower 6. A second pressure detection buffer assembly is provided in the fourth L-shaped slot.

[0028] Please see Figure 1-2 The telescopic end of the main hydraulic lifting drive mechanism 3 is also equipped with telescopic limit rods 8 arranged in a circular array. The telescopic limit rods 8 are distributed one-to-one with the transverse hydraulic drive mechanism 5, and the telescopic limit rods 8 are connected to the telescopic end of the main hydraulic lifting drive mechanism 3 through the second fixed seat 7. The telescopic limit rods 8 are used to provide auxiliary support after the secondary tower 6 extends, preventing the transverse hydraulic drive mechanism 5 from being subjected to excessive bending moment.

[0029] In this embodiment, the telescopic limit rod 8 is an adjustable hydraulic damping rod, which is fixed adjacent to the transverse hydraulic drive mechanism 5. The extension speed of the hydraulic rod is controlled in real time to ensure that the width of the first-stage tower 1 and the second-stage tower 6 is consistent, thus ensuring the overall force balance.

[0030] Please see Figure 1-2 Auxiliary hydraulic lifting drive mechanisms 10 are fixedly installed at each of the four corners of the base of the primary tower 1. A support plate 11 is fixedly installed at the telescopic end of each auxiliary hydraulic lifting drive mechanism 10. The auxiliary hydraulic lifting drive mechanism 10 drives the support plate 11 to rise, providing stable support for the secondary tower 6 as it rises.

[0031] Please see Figure 3 The specific structure of the first pressure detection buffer component: The system includes a first side groove 12, a first pressure sensor 13, a first movable block 14, a first spring 15, and a first outer plate 16. The first side groove 12 is formed on the inner wall of the first L-shaped slot of the first-stage tower 1 column. The first pressure sensor 13 is fixedly installed on the inner wall of the bottom of the first side groove 12. The first movable block 14 is slidably connected to the inside of the first side groove 12, with one side opposite to the first pressure sensor 13. One end of the first spring 15 is fixedly installed on the other side of the first movable block 14, and the other end of the first spring 15 is fixedly installed with the first outer plate 16. The first outer plate 16 can protrude from the contact surface of the first L-shaped slot. When the second L-shaped slot engages with the first L-shaped slot, the outer wall of the second-stage tower 6 column will press against the first outer plate 16, and the pressure will be transmitted to the first movable block 14 through the first spring 15, and then detected by the first pressure sensor 13. When the pressure reaches a preset threshold, it indicates that the second-stage tower 6 has been fully positioned and locked.

[0032] Please see Figure 4 The specific structure of the second pressure detection buffer component: It includes a second side groove 18, a second pressure sensor 19, a second movable block 20, a second spring 21, and a second outer plate 22. The second side groove 18 is formed on the inner wall of the fourth L-shaped slot of the top limiting seat 17. The second pressure sensor 19 is fixedly installed on the inner wall of the second side groove 18. The second movable block 20 is slidably connected to the inside of the second side groove 18, the second spring 21 is fixedly installed on one side of the second movable block 20, and the second outer plate 22 is fixedly installed on the other end of the second spring 21. Its working principle is the same as that of the first pressure detection buffer assembly, and it is used to detect the positioning status of the three-stage slot.

[0033] Specifically, in this embodiment, the rocket recovery device further includes a control component, which is located on the outside of the first-stage tower 1 or inside the base, and includes a controller and a hydraulic control valve assembly. The controller is a PLC programmable logic controller or an embedded microcontroller, whose signal input terminals are electrically connected to the first pressure sensor 13 and the second pressure sensor 19, respectively, and whose control output terminals are electrically connected to the solenoid valves of the hydraulic control valve assembly. The oil inlet and return ports of the hydraulic control valve assembly are connected to an external hydraulic station, and each of its working oil ports is respectively connected to the inlet and outlet oil circuits of the main hydraulic lifting drive mechanism 3, each lateral hydraulic drive mechanism 5, and the auxiliary hydraulic lifting drive mechanism 10.

[0034] The controller has pre-stored target height parameters. During operation, the operator inputs the rocket model or the target height directly via the host computer or local buttons. The controller first calculates the extension amount of the main hydraulic lifting drive mechanism 3 and controls the corresponding solenoid valve to move the extension end of the main hydraulic lifting drive mechanism 3 to the predetermined position. Subsequently, the controller simultaneously activates the horizontal hydraulic drive mechanisms 5 of each layer: opening the extension oil circuit of the horizontal hydraulic drive mechanism 5, when the first pressure sensor 13 and the second pressure sensor 19 at the corresponding position detect that the pressure value reaches the preset threshold, it indicates that the L-shaped slot of the secondary tower 6 of that layer has been fully engaged and locked. The controller then closes the solenoid valve of that layer and locks the oil circuit.

[0035] The aforementioned control components enable automated, precise, and safe operation of the rocket recovery device's altitude adjustment.

[0036] The working principle of a telescopic rocket recovery tower is as follows: When the rocket has not entered the recoverable range, the control system first starts the bottom hydraulic pump (i.e., the hydraulic source of the main hydraulic lifting drive mechanism 3) according to the target rocket model or input height parameters, driving the hydraulic cylinder of the main hydraulic lifting drive mechanism 3 to extend. Its telescopic end moves vertically upward, driving the entire second-stage tower 6 to move from bottom to top to the preset coarse adjustment height. During this process, the auxiliary hydraulic lifting drive mechanism 10 can drive the support plate 11 to rise. The support plate 11 can support the bottom of the second-stage tower 6, ensuring the stability of the second-stage tower 6 during the ascent. When the second-stage tower 6 rises to the highest point (the second-stage tower 6 can stop at any position during the ascent to the highest point, thus adapting to various rocket models at different heights; this explanation uses the ascent to the highest point as an example), the second L-shaped slot at the bottom of its tower column corresponds to the position of the first L-shaped slot on the inner side of the top of the first-stage tower 1 tower column, and at the same time, the third L-shaped slot at the top of the second-stage tower 6 tower column corresponds to the position of the fourth L-shaped slot on the inner side of the top limiting seat 17. Then the controller shuts off the oil circuit of the main hydraulic lifting drive mechanism 3 to maintain the height.

[0037] After the secondary tower 6 rises to its highest point (i.e., after the main hydraulic lifting drive mechanism 3 has completed its work, the lateral hydraulic drive mechanism 5 is activated, and there is no motion interference between the two), the external hydraulic pump is started to drive each lateral hydraulic drive mechanism 5 (lateral hydraulic rod) to extend. At the same time, the telescopic limit rod 8 (damping rod) works synchronously to buffer and control the extension speed. The telescopic end of the lateral hydraulic drive mechanism 5 pushes the corresponding part of the secondary tower 6 horizontally outward, so that the overall width of the secondary tower 6 is consistent with the tower column span of the primary tower 1, ensuring that the secondary tower 6 is subjected to balanced force in all directions, providing a stable lateral reference for the subsequent precise positioning of the robotic arm. During this process, the second L-shaped slot engages with the first L-shaped slot, and at the same time, the third L-shaped slot and the fourth L-shaped slot engage. The first spring 15 and the second spring 21 provide a buffering effect during the lateral extension of the secondary tower 6, preventing it from directly contacting the primary tower 1 and causing unnecessary damage. When the pressure value detected by the first pressure sensor 13 and the second pressure sensor 19 reaches the preset value, it indicates that the secondary tower 6 has moved into position, and the controller then shuts off the external hydraulic pump.

[0038] After completing the lateral width adjustment, assemble the truss (see...). Figure 5 Specifically, the upper end of the secondary tower 6 has reserved space and holes. After the position of the secondary tower 6 is determined, the truss is fixed to the secondary tower 6 with bolts. Then the robotic arm is assembled on the truss. Since the truss is located in the upper part of the secondary tower 6, the truss will not cause movement interference to the secondary tower 6 when it retracts.

[0039] Once the robotic arm is precisely positioned, the device enters the recovery state. During the rocket's descent, its bottom or side engages with the capture interface at the top of the robotic arm. The impact force is transmitted through the robotic arm to the second stage tower 6, and then through the L-shaped slot to the first stage tower 1 and the ground foundation. The first and second pressure detection and buffer components provide elastic cushioning in the engaged state, absorbing landing energy.

[0040] After the rocket recovery operation is completed, the control system performs the reset operation in reverse order: first, the servo motor is driven in reverse to lower the robotic arm to the initial folded position; then, the horizontal hydraulic drive mechanism 5 is retracted to restore the width of the second stage tower 6; finally, the main hydraulic lifting drive mechanism 3 is retracted to lower the second stage tower 6 to the lowest position and release the locks of all L-shaped slots.

[0041] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A telescopic rocket recovery tower, comprising a primary tower (1), wherein the columns of the primary tower (1) are connected by connecting columns (2), characterized in that: The main hydraulic lifting drive mechanism (3) is fixedly installed at the center of the base of the first-level tower (1). The telescopic end of the main hydraulic lifting drive mechanism (3) is provided with multiple layers, each layer including multiple sets of transverse hydraulic drive mechanisms (5) arranged in a circular array. The multiple layers of transverse hydraulic drive mechanisms (5) are arranged in layers along the axial direction of the main hydraulic lifting drive mechanism (3). The telescopic ends of the transverse hydraulic drive mechanisms (5) are connected to the second-level tower (6). The first-stage tower (1) is provided with a longitudinal guide groove on its tower column, and the second-stage tower (6) is nested inside the first-stage tower (1) and can be raised and lowered along the longitudinal guide groove; The inner side of the top of the first-stage tower (1) column is provided with a first L-shaped slot, and the outer side of the bottom and top of the second-stage tower (6) column is provided with a second L-shaped slot and a third L-shaped slot, respectively. The first L-shaped slot and the second L-shaped slot cooperate with each other, and the first L-shaped slot is provided with a first pressure detection buffer component. The top of the secondary tower (6) is provided with a top seat (9), which is fixedly connected to the top of the telescopic part of the main hydraulic lifting drive mechanism (3) through a connecting rod. The bottom of the top seat (9) is fixedly installed with a top limiting seat (17). The inner side of the top limiting seat (17) is provided with a fourth L-shaped slot. The third L-shaped slot and the fourth L-shaped slot cooperate with each other, and the fourth L-shaped slot is provided with a second pressure detection buffer component.

2. The telescopic rocket recovery tower according to claim 1, characterized in that: The transverse hydraulic drive mechanism (5) is connected to the main hydraulic lifting drive mechanism (3) via the first fixed seat (4).

3. A telescopic rocket recovery tower according to claim 1, characterized in that: The telescopic end of the main hydraulic lifting drive mechanism (3) is equipped with telescopic limit rods (8) arranged in a circular array. The telescopic limit rods (8) are distributed one-to-one with the transverse hydraulic drive mechanism (5), and the telescopic limit rods (8) are connected to the telescopic end of the main hydraulic lifting drive mechanism (3) through the second fixed seat (7).

4. A telescopic rocket recovery tower according to claim 1, characterized in that: The base of the first-stage tower (1) is fixedly installed with auxiliary hydraulic lifting drive mechanisms (10) at the four corners, and the telescopic end of the auxiliary hydraulic lifting drive mechanism (10) is fixedly installed with a support plate (11).

5. A telescopic rocket recovery tower according to claim 1, characterized in that: The first pressure detection buffer assembly includes a first side groove (12), a first pressure sensor (13), a first movable block (14), a first spring (15), and a first outer plate (16). The first side groove (12) is opened at the first L-shaped slot position of the first column of the first-stage tower (1). The first pressure sensor (13) is fixedly installed on the inner wall of the first side groove (12). The first movable block (14) is slidably connected to the inside of the first side groove (12). The first spring (15) is fixedly installed on one side of the first movable block (14). The first outer plate (16) is fixedly installed on one end of the first spring (15).

6. A telescopic rocket recovery tower according to claim 5, characterized in that: The second pressure detection buffer assembly includes a second side groove (18), a second pressure sensor (19), a second movable block (20), a second spring (21), and a second outer plate (22); The second side groove (18) is opened at the fourth L-shaped slot position of the top limiting seat (17). The second pressure sensor (19) is fixedly installed on the inner wall of the second side groove (18). The second movable block (20) is slidably connected to the inside of the second side groove (18). The second spring (21) is fixedly installed on one side of the second movable block (20). The second outer plate (22) is fixedly installed on one end of the second spring (21).

7. A telescopic rocket recovery tower according to claim 6, characterized in that: It also includes a control component, which includes a controller and a hydraulic control valve group; the signal input terminal of the controller is electrically connected to the first pressure sensor (13) and the second pressure sensor (19) respectively, and the control output terminal of the controller is electrically connected to the solenoid valve of the hydraulic control valve group; each working oil port of the hydraulic control valve group is respectively connected to the inlet and outlet oil circuits of the main hydraulic lifting drive mechanism (3), the lateral hydraulic drive mechanism (5) and the auxiliary hydraulic lifting drive mechanism (10).

8. A telescopic rocket recovery tower according to claim 3, characterized in that: The telescopic limit rod (8) is an adjustable hydraulic damping rod.

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