Multi-angle pipeline split charging device for special part of aero-engine
By adopting a multi-angle pipeline separation device in an aircraft engine and using the adjustable connection structure of the first- and second-level lever mechanisms, the problem of inefficiency of traditional wrenches when disassembling the inner layer and narrow space pipelines of the engine is solved, and efficient pipeline separation operation is achieved.
Patent Information
- Application Number
- CN202422098058.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-28
AI Technical Summary
When the prior art uses traditional dull wrench when assembling the inner layer of the engine and the narrow space pipeline, it is time-consuming, labor-intensive and inefficient, which seriously affects the engine maintenance efficiency.
A multi-angle pipeline assembly device for special parts of the aero engine is adopted, and the device includes a first-level lever mechanism and a second-level lever mechanism. It is detachably connected through a first plug-in structure with adjustable connection angle, allowing the secondary lever mechanism to be adjusted according to the pipeline layout and space size to realize multi-angle operation.
The device can quickly and efficiently complete the screwing and disassembly of pipeline joints without removing the barrier pipeline, improving the efficiency of the assembly of the inner layer of the engine and the narrow space pipeline.
Smart Images
Figure CN222958495U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of maintenance devices for aero-engine pipeline systems, in particular to a multi-angle pipeline sub-assembly device for special parts of an aero-engine. Background Art
[0002] The fuel system, lubricating oil system, air system and control system of an aero-engine are all connected and operated through different pipeline systems. Therefore, pipeline sub-assembly is an important link in the maintenance of aero-engines. The pipelines of each system of the aero-engine are relatively concentrated and compactly distributed. In some places, the pipelines are arranged in multiple layers, and in some places, the pipelines are distributed in the gaps between engine accessories. Most of the internal pipelines of each system of the aero-engine are connected through pipeline joints. Therefore, how to quickly and effectively disassemble and assemble each pipeline joint between narrow spaces and multiple layers of pipelines is the core of pipeline sub-assembly.
[0003] Currently, the most widely used tools for disassembling and assembling engine pipeline joints are ordinary open-end wrenches of different sizes. Ordinary wrenches are effective for sub-assembling pipeline joints distributed on the outer surface of the engine where the space is relatively spacious. However, for the internal joints located in narrow spaces or multiple layers of pipelines, they cannot be directly sub-assembled. It is necessary to remove the blocking pipelines or accessories, which is time-consuming, laborious and inefficient. Moreover, the wrench is prone to slipping. Once the wrench slips, it is easy to damage the engine, and the operator is also prone to injury due to the slipping of the wrench.
[0004] In addition, for the inner pipeline oil leakage faults and accessory replacement faults encountered during the whole-engine test run of the engine, due to the shielding of the test bench, the operation space becomes smaller, and the disassembly and assembly efficiency of ordinary open-end wrenches is even lower.
[0005] During the troubleshooting of some whole-engine test runs of engines, in order to eliminate the oil leakage of an inner pipeline joint, it is often necessary to disassemble 3-4 joints around the joint first, and even remove some pipelines to complete the elimination of the oil leakage fault of this one joint.
[0006] In summary, the problem of the existing technology is that when sub-assembling the inner pipelines of the engine and pipelines in narrow spaces, especially when sub-assembling pipelines during the whole-engine test run of the engine, using traditional open-end wrenches is time-consuming, laborious and inefficient, seriously affecting the engine maintenance efficiency. At present, there is no complete set of special pipeline sub-assembly tools in the domestic market for sub-assembling inner pipelines of engines, pipelines in narrow spaces, and troubleshooting pipelines during the whole-engine test run. Content of the Utility Model
[0007] The purpose of the present utility model is to provide a multi-angle pipeline sub-assembly device for special parts of an aero-engine, so as to solve the problems that when using traditional fixed-end wrenches to sub-assemble the inner pipelines and pipelines in narrow spaces of the existing sub-assembled engine, especially during the whole-engine test run of the engine, it is time-consuming, laborious and inefficient, seriously affecting the maintenance efficiency of the engine.
[0008] To solve the above technical problems, the present utility model adopts the following technical solutions:
[0009] A multi-angle pipeline sub-assembly device for special parts of an aero-engine includes a first-level lever mechanism and a second-level lever mechanism. One end of the first-level lever mechanism is the operation end, and the other end of the first-level lever mechanism is connected to the second-level lever mechanism. The first-level lever mechanism and the second-level lever mechanism are detachably connected through a first plug-in structure with adjustable connection angle.
[0010] During use, the operation end of the first-level lever mechanism is sleeved on the conduit nut, and the first-level lever mechanism transmits the torque to the second-level lever mechanism. Since the second-level lever mechanism and the first-level lever mechanism are detachably connected through a first plug-in structure with adjustable connection angle, the posture and angle of the second-level lever mechanism can be adjusted according to the pipeline layout and space size. When holding the second-level lever mechanism and rotating it, the second-level lever mechanism and the first-level lever mechanism act together on the conduit nut to make it rotate, so that the screwing of the conduit nut can be completed conveniently and quickly, and the disassembly and assembly of the corresponding pipeline can be completed without removing the blocking pipeline.
[0011] As a further preference of the present utility model, lever safety holes are provided in the middle of both the first-level lever mechanism and the second-level lever mechanism.
[0012] The lever safety holes can prevent the first-level lever mechanism and the second-level lever mechanism from slipping during operation.
[0013] As a further preference of the present utility model, the structure of the operation end of the first-level lever mechanism is a design structure of an internal plum blossom hole with reinforcing ribs.
[0014] When the operation end of the first-level lever mechanism can directly reach the spatial position of the pipeline nut, this structure can conveniently and quickly sleeve the pipeline nut by using the design structure of the internal plum blossom hole with reinforcing ribs.
[0015] As a further preference of the present utility model, an operation end socket part is also provided at the design structure of the internal plum blossom hole with reinforcing ribs. One end outer wall of the operation end socket part connected to the design structure of the internal plum blossom hole with reinforcing ribs is provided with an outer plum blossom structure of the operation end socket part adapted to the design structure of the internal plum blossom hole with reinforcing ribs, and the other end of the operation end socket part is provided with an internal plum blossom structure of the operation end socket part.
[0016] When the working end of the primary lever mechanism cannot directly contact the spatial position of the pipe nut, a corresponding auxiliary mechanism needs to be set up. The so-called auxiliary mechanism is a working end socket, one end of which is connected to the primary lever mechanism, and the other end is used to connect with the pipe nut.
[0017] As a further preferred embodiment of the present invention, a socket safety hole is provided in the middle of the working end socket.
[0018] The socket safety hole can prevent the socket at the working end from slipping during operation.
[0019] As a further preferred embodiment of the utility model, the first plug-in structure with adjustable connection angle includes a first inner plum blossom hole for connection and a first outer plum blossom structure for connection, the first inner plum blossom hole for connection is opened at one end of the primary lever mechanism, and the first outer plum blossom structure for connection is arranged at one end of the secondary lever mechanism, and the first inner plum blossom hole for connection and the first outer plum blossom structure for connection are adapted to each other.
[0020] The minimum value of the angle adjustment between the first connecting inner plum blossom hole and the first connecting outer plum blossom structure is 30°.
[0021] As a further preferred embodiment of the utility model, a third-stage lever mechanism is provided at the other end of the second-stage lever mechanism connected to the first-stage lever mechanism, and the third-stage lever mechanism is detachably connected to the second-stage lever mechanism through a plug-in structure with a second adjustable connection angle, and a lever safety hole is provided in the middle of the third-stage lever mechanism.
[0022] The three-stage lever mechanism is only used when the torque of the two-stage lever mechanism is insufficient or the lever posture needs to be adjusted for a second time according to the pipeline layout and space size. When in use, the working end of the first-stage lever mechanism is inserted into the catheter nut, and the first-stage lever mechanism transmits the torque to the second-stage lever mechanism. The second-stage lever mechanism then adjusts its posture according to the pipeline layout and space size, and cooperates with the first-stage lever mechanism to push the catheter nut to rotate, or the second-stage lever mechanism adjusts its posture and transmits the torque to the third-stage lever mechanism. The third-stage lever mechanism adjusts its posture again according to the pipeline layout and space size, and cooperates with the first-stage lever mechanism and the second-stage lever mechanism to push the catheter nut to rotate, thereby achieving the disconnection or tightening assembly of the catheter nut and the connected product. The lever safety hole here can prevent the three-stage lever mechanism from slipping during operation.
[0023] As a further preference of the utility model, the second plug-in structure with adjustable connection angle includes a second inner plum blossom hole for connection and a second outer plum blossom structure for connection, the second inner plum blossom hole for connection is opened at one end of the three-stage lever mechanism, and the second outer plum blossom structure for connection is arranged at one end of the two-stage lever mechanism, and the second inner plum blossom hole for connection and the second outer plum blossom structure for connection are adapted to each other.
[0024] The minimum angle adjustment of the plug-in structure with adjustable connection angle is also 30°.
[0025] As a further preference of the present utility model, the structure of the working end of the first-level lever mechanism is a design structure of an inner plum blossom hole with reinforcing ribs.
[0026] When the working end of the first-level lever mechanism can directly reach the spatial position of the pipeline nut, this structure can conveniently and quickly use the design structure of the inner plum blossom hole with reinforcing ribs to sleeve the pipeline nut.
[0027] As a further preference of the present utility model, a working end socket is also provided at the design structure of the inner plum blossom hole with reinforcing ribs. One end of the working end socket connected to the design structure of the inner plum blossom hole with reinforcing ribs is provided with an outer plum blossom structure of the working end socket adapted to the design structure of the inner plum blossom hole with reinforcing ribs, and the other end of the working end socket is provided with an inner plum blossom structure of the working end socket.
[0028] When the working end of the first-level lever mechanism cannot directly reach the spatial position of the pipeline nut, a corresponding auxiliary mechanism needs to be set. The so-called auxiliary mechanism is the working end socket, one end of which is connected to the first-level lever mechanism and the other end is used to connect to the pipeline nut. Compared with the prior art, the present utility model can at least achieve one of the following beneficial effects:
[0029] 1. Solve the problems that in the existing inner-layer pipelines and narrow-space pipelines of sub-assembled engines, especially when sub-assembling pipelines during the whole-engine test run of the engine, using traditional fixed-end wrenches is time-consuming, laborious, and inefficient, seriously affecting the engine maintenance efficiency.
[0030] 2. The lever can be adjusted at multiple angles according to the pipeline layout and space size to adapt to the operation of inner-layer pipelines and narrow spaces.
[0031] 3. The safety hole of the lever can prevent the first-level lever mechanism and the second-level lever mechanism from slipping during operation.
[0032] 4. The safety hole of the lever can prevent the third-level lever mechanism from slipping during operation.
[0033] 5. The safety hole of the socket can prevent the working end socket from slipping during operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 is a schematic structural diagram of the present utility model.
[0035] Figure 2 is a schematic structural diagram of the present utility model after adding a working end socket at the design structure of the inner plum blossom hole with reinforcing ribs.
[0036] Figure 3This is a schematic structural diagram of the present utility model after adding a three-stage lever mechanism.
[0037] Figure 4 This is a schematic structural diagram of the present utility model after adding a three-stage lever mechanism and simultaneously adding an operating end socket at the design structure of the inner plum blossom hole with reinforcing ribs.
[0038] Figure 5 This is a simplified diagram of the first-stage lever mechanism of the present utility model.
[0039] Figure 6 This is a simplified diagram of the second-stage lever mechanism of the present utility model.
[0040] Figure 7 This is a schematic structural diagram of the operating end socket of the present utility model. Detailed implementation manners
[0041] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0042] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.
[0043] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.
[0044] It should be noted that: like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0045] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this utility model is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0046] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Specific Embodiment 1:
[0048] Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 A multi-angle pipeline sub-assembly device for special parts of an aero-engine is shown, which includes a first-level lever mechanism 1 and a second-level lever mechanism 2. One end of the first-level lever mechanism 1 is the operation end, and the other end of the first-level lever mechanism 2 is connected to the second-level lever mechanism 2. The first-level lever mechanism 1 and the second-level lever mechanism 2 are detachably connected through a plug-in structure with an adjustable connection angle.
[0049] During use, the operation end of the first-level lever mechanism is sleeved into the conduit nut, and the first-level lever mechanism transmits the torque to the second-level lever mechanism. Since the second-level lever mechanism and the first-level lever mechanism are detachably connected through a plug-in structure with an adjustable connection angle, the posture and angle of the second-level lever mechanism can be adjusted according to the pipeline layout and space size. When holding the second-level lever mechanism and rotating it, the second-level lever mechanism and the first-level lever mechanism act together on the conduit nut to make it rotate, so that the screwing of the conduit nut can be completed conveniently and quickly, and the disassembly and assembly of the corresponding pipeline can be completed without removing the blocking pipeline. Specific Embodiment 2:
[0051] This embodiment further describes the first-level lever mechanism 1 and the second-level lever mechanism 2 on the basis of the specific embodiment 1. Lever safety holes 3 are provided in the middle of both the first-level lever mechanism 1 and the second-level lever mechanism 2.
[0052] The lever safety holes can prevent the first-level lever mechanism and the second-level lever mechanism from slipping during operation. Specific embodiment 3:
[0054] This embodiment further describes the first-level lever mechanism 1 on the basis of the specific embodiment 1. The structure of the working end of the first-level lever mechanism 1 is a design structure 11 of an internal plum blossom hole with reinforcing ribs.
[0055] When the working end of the first-level lever mechanism can directly reach the spatial position of the pipeline nut, this structure can be used to conveniently and quickly fit the internal plum blossom hole design structure with reinforcing ribs onto the pipeline nut. Specific embodiment 4:
[0057] This embodiment further describes the design structure 11 of the internal plum blossom hole with reinforcing ribs on the basis of the specific embodiment 3. An operating end socket 4 is further provided at the design structure 11 of the internal plum blossom hole with reinforcing ribs. The outer wall of one end of the operating end socket 4 connected to the design structure 11 of the internal plum blossom hole with reinforcing ribs is provided with an outer plum blossom structure of the operating end socket adapted to the design structure 11 of the internal plum blossom hole with reinforcing ribs, and the other end of the operating end socket 4 is provided with an internal plum blossom structure of the operating end socket.
[0058] When the working end of the first-level lever mechanism cannot directly reach the spatial position of the pipeline nut, a corresponding auxiliary mechanism needs to be set up. The so-called auxiliary mechanism is the operating end socket, one end of which is connected to the first-level lever mechanism, and the other end is used to connect to the pipeline nut. Specific embodiment 5:
[0060] This embodiment further describes the operating end socket 4 on the basis of the specific embodiment 4. A socket safety hole 41 is provided in the middle of the operating end socket 4.
[0061] The socket safety hole can prevent the operating end socket from slipping during operation. Specific embodiment 6:
[0063] This embodiment further illustrates the plug-in structure of the first adjustable connection angle on the basis of the specific embodiment 1. The first plug-in structure of the first adjustable connection angle includes a first inner plum blossom hole 12 for connection and a first outer plum blossom structure for connection. The first inner plum blossom hole 12 for connection is provided at one end of the primary lever mechanism 1, and the first outer plum blossom structure for connection is provided at one end of the secondary lever mechanism 2. The first inner plum blossom hole 12 for connection and the first outer plum blossom structure for connection are adapted to each other.
[0064] The minimum value of the angle adjustment between the first connecting inner plum blossom hole and the first connecting outer plum blossom structure is 30°. Specific embodiment 7:
[0066] This embodiment further illustrates the secondary lever mechanism 2 and the primary lever mechanism 1 on the basis of the specific embodiment 1. A third-stage lever mechanism 5 is provided at the other end of the secondary lever mechanism 2 connected to the primary lever mechanism 1. The third-stage lever mechanism 5 is detachably connected to the secondary lever mechanism 2 via a plug-in structure with a second adjustable connection angle. A lever safety hole 3 is provided in the middle of the third-stage lever mechanism 5.
[0067] The three-stage lever mechanism is only used when the torque of the two-stage lever mechanism is insufficient or the lever posture needs to be adjusted for a second time according to the pipeline layout and space size. When in use, the working end of the first-stage lever mechanism is inserted into the catheter nut, and the first-stage lever mechanism transmits the torque to the second-stage lever mechanism. The second-stage lever mechanism then adjusts its posture according to the pipeline layout and space size, and cooperates with the first-stage lever mechanism to push the catheter nut to rotate, or the second-stage lever mechanism adjusts its posture and transmits the torque to the third-stage lever mechanism. The third-stage lever mechanism adjusts its posture again according to the pipeline layout and space size, and cooperates with the first-stage lever mechanism and the second-stage lever mechanism to push the catheter nut to rotate, thereby achieving the disconnection or tightening assembly of the catheter nut and the connected product. The lever safety hole here can prevent the three-stage lever mechanism from slipping during operation. Specific embodiment 8:
[0069] This embodiment further illustrates the plug-in structure of the second adjustable connection angle on the basis of the specific embodiment 7. The plug-in structure of the second adjustable connection angle includes a second inner plum blossom hole 51 for connection and a second outer plum blossom structure for connection. The second inner plum blossom hole 51 for connection is provided at one end of the three-stage lever mechanism 5, and the second outer plum blossom structure for connection is provided at one end of the two-stage lever mechanism 2. The second inner plum blossom hole 51 for connection is adapted to the second outer plum blossom structure for connection.
[0070] The minimum value of the angle adjustment of the plug-in structure of the second adjustable connection angle is also 30°. Specific embodiment 9:
[0072] This embodiment further describes the first-level lever mechanism 1 on the basis of Specific Embodiment 7. The structure of the working end of the first-level lever mechanism 1 is a design structure 11 of an internal plum blossom hole with reinforcing ribs.
[0073] When the working end of the first-level lever mechanism can directly reach the spatial position of the pipeline nut, this structure can conveniently and quickly use the design structure of the internal plum blossom hole with reinforcing ribs to sleevethe pipeline nut. Specific Embodiment 10:
[0075] This embodiment further describes the design structure 11 of the internal plum blossom hole with reinforcing ribs on the basis of Specific Embodiment 9. A working end socket 4 is further provided at the design structure 11 of the internal plum blossom hole with reinforcing ribs. The outer wall of one end of the working end socket 4 connected to the design structure 11 of the internal plum blossom hole with reinforcing ribs is provided with an outer plum blossom structure of the working end socket adapted to the design structure 11 of the internal plum blossom hole with reinforcing ribs, and the other end of the working end socket 4 is provided with an inner plum blossom structure of the working end socket.
[0076] When the working end of the first-level lever mechanism cannot directly reach the spatial position of the pipeline nut, a corresponding auxiliary mechanism needs to be set up. The so-called auxiliary mechanism is the working end socket, one end of which is connected to the first-level lever mechanism and the other end is used to connect to the pipeline nut.
[0077] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A multi-angle pipeline subassembly device for special parts of an aircraft engine, characterized in that: The invention comprises a primary lever mechanism (1) and a secondary lever mechanism (2), wherein one end of the primary lever mechanism (1) is an operating end, and the other end of the primary lever mechanism (2) is connected to the secondary lever mechanism (2), and the primary lever mechanism (1) and the secondary lever mechanism (2) are detachably connected via a plug-in structure with a first adjustable connection angle.
2. The multi-angle pipeline subassembly device for special parts of an aircraft engine according to claim 1, characterized in that: Lever safety holes (3) are provided in the middle of the primary lever mechanism (1) and the secondary lever mechanism (2).
3. The multi-angle pipeline subassembly device for special parts of an aircraft engine according to claim 1, characterized in that: The structure of the working end of the primary lever mechanism (1) is a plum blossom hole design structure (11) with reinforcing ribs.
4. The multi-angle pipeline subassembly device for special parts of an aircraft engine according to claim 3, characterized in that: The inner plum blossom hole design structure with reinforcing ribs (11) is also provided with an operating end sleeve (4); the outer wall of one end of the operating end sleeve (4) connected to the inner plum blossom hole design structure with reinforcing ribs (11) is provided with an operating end sleeve outer plum blossom structure adapted to the inner plum blossom hole design structure with reinforcing ribs (11); and the other end of the operating end sleeve (4) is provided with an operating end sleeve inner plum blossom structure.
5. The multi-angle pipeline subassembly device for special parts of an aircraft engine according to claim 4, characterized in that: A socket safety hole (41) is provided in the middle of the working end socket (4).
6. The multi-angle pipeline subassembly device for special parts of an aircraft engine according to claim 1, characterized in that: The first plug-in structure with adjustable connection angle comprises a first connection inner plum blossom hole (12) and a first connection outer plum blossom structure, the first connection inner plum blossom hole (12) being provided at one end of the primary lever mechanism (1), the first connection outer plum blossom structure being provided at one end of the secondary lever mechanism (2), the first connection inner plum blossom hole (12) and the first connection outer plum blossom structure being adapted to each other.
7. The multi-angle pipeline subassembly device for special parts of an aircraft engine according to claim 1, characterized in that: A third-stage lever mechanism (5) is further provided at the other end of the second-stage lever mechanism (2) connected to the first-stage lever mechanism (1); the third-stage lever mechanism (5) is detachably connected to the second-stage lever mechanism (2) via a plug-in structure with a second adjustable connection angle; a lever safety hole (3) is provided in the middle of the third-stage lever mechanism (5).
8. The multi-angle pipeline subassembly device for special parts of an aircraft engine according to claim 7, characterized in that: The second plug-in structure with adjustable connection angle comprises a second connection inner plum blossom hole (51) and a second connection outer plum blossom structure, the second connection inner plum blossom hole (51) being provided at one end of the three-stage lever mechanism (5), the second connection outer plum blossom structure being provided at one end of the two-stage lever mechanism (2), the second connection inner plum blossom hole (51) and the second connection outer plum blossom structure being adapted to each other.
9. The multi-angle pipeline subassembly device for special parts of an aircraft engine according to claim 7, characterized in that: The structure of the working end of the primary lever mechanism (1) is a plum blossom hole design structure (11) with reinforcing ribs.
10. The multi-angle pipeline subassembly device for special parts of an aircraft engine according to claim 9, characterized in that: The inner plum blossom hole design structure with reinforcing ribs (11) is also provided with an operating end sleeve (4); the outer wall of one end of the operating end sleeve (4) connected to the inner plum blossom hole design structure with reinforcing ribs (11) is provided with an operating end sleeve outer plum blossom structure adapted to the inner plum blossom hole design structure with reinforcing ribs (11); and the other end of the operating end sleeve (4) is provided with an operating end sleeve inner plum blossom structure.