Special tool for laying grounding downlead of power transmission line tower

Abstract

The utility model relates to the technical field of electric power engineering, in particular to a special tool for laying a grounding down lead of a power transmission line tower. Comprising a fixing sleeve component used for fixing a reinforcing steel bar and a stress application rotating component installed on the fixing sleeve component, and a self-locking component is arranged between the fixing sleeve component and the stress application rotating component. Through the integrated design of the fixed sleeve part and the stress application rotating part, the portability and the operation convenience of the tool are achieved, and through the cooperation of a sleeve and a rotating shaft seat in the fixed sleeve part and the operation of a stress application rod of the stress application rotating part, the practicability of the tool is achieved. And a self-locking pawl in the self-locking part is matched with a ratchet wheel, so that high safety is realized. By means of the structural cooperation, the stress application rotating component can be locked in the bending process, accidental loosening or springback caused by external force is prevented, and therefore the safety of operators is protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric power engineering, especially relates to a special tool for laying down grounding down lead of transmission line tower. BACKGROUND

[0002] When a new transmission line tower is built, the grounding down lead is a key component connecting the ground net and the tower, and its main function is to drain, to ensure that the lightning current can be safely discharged into the ground, and to protect the line insulation. The laying quality of the grounding down lead is directly related to the lightning withstand level and the lightning trip-out rate of the tower. Therefore, the laying process of the grounding down lead requires high requirements, and needs to be closely attached to the foundation column and the foundation protection cap to meet the requirements of process aesthetics.

[0003] At present, the grounding down lead usually adopts φ12 steel bars, and it is difficult to lay by manual bending due to its high hardness, and it is difficult to meet the requirements of process aesthetics. The existing bending or folding methods mainly include manual cold bending and machine cold bending: manual cold bending: this method is difficult to realize precise bending angle and complex bending shape, especially for larger specification grounding down lead, manual cold bending is very difficult or even impossible to realize, and the shape after bending may not be regular enough. Machine cold bending: this method can bend larger specification grounding down lead, but the equipment cost is high, and it is usually suitable for circular steel with a diameter of 12mm or thicker flat steel. In addition, machine cold bending requires certain operation skills and maintenance knowledge, and the equipment is relatively bulky, which is not suitable for use in narrow space or complex terrain construction site.

[0004] The existing technology has the following problems in the laying process of the grounding down lead: manual cold bending is difficult to realize precise control and complex shape bending, machine cold bending has high cost and complex operation, and is not suitable for narrow or complex terrain construction site, and there is a lack of an economical and convenient tool to adapt to complex outdoor environment and improve the laying efficiency. UTILITY MODEL CONTENTS

[0005] In view of the above problems of the existing special tool for laying down grounding down lead of transmission line tower, the utility model is proposed.

[0006] Therefore, the utility model aims to provide a special tool for laying down grounding down lead of transmission line tower, which aims to: design a special tool to conveniently and easily bend and lay the grounding down lead, increase the self-locking protection device, improve the bending efficiency, adapt to complex outdoor operation, and save the physical strength of the operator.

[0007] To solve the above technical problems, the utility model provides technical scheme as follows: a special tool for laying down grounding down lead of transmission line tower, including fixed sleeve part for fixing reinforcing bar, and force adding rotating part installed on the fixed sleeve part, and self locking part arranged between the fixed sleeve part and the force adding rotating part.

[0008] As a preferred scheme of the special tool for laying down grounding down lead of transmission line tower, the fixed sleeve part includes a shaft seat and a sleeve installed on the shaft seat, and the sleeve has a containing groove on the side surface for placing reinforcing bar.

[0009] As a preferred scheme of the special tool for laying down grounding down lead of transmission line tower, the force adding rotating part includes a bending grinding column, a force adding rod and a rotating installation main body, wherein the bending grinding column and the force adding rod are detachably installed on the rotating installation main body.

[0010] As a preferred scheme of the special tool for laying down grounding down lead of transmission line tower, the installation between the fixed sleeve part and the force adding rotating part is realized through bearing connection between the shaft seat and the rotating installation main body.

[0011] As a preferred scheme of the special tool for laying down grounding down lead of transmission line tower, the self locking part includes a ratchet chamber installed below the shaft seat, a locking cover installed at the lower end of the shaft seat, a ratchet and a self locking pawl corresponding to the ratchet arranged in the ratchet chamber.

[0012] As a preferred scheme of the special tool for laying down grounding down lead of transmission line tower, a torsion spring is arranged in the self locking pawl, the torsion spring is sleeved on a fixed pin, and the fixed pin is installed on the shaft seat.

[0013] As a preferred scheme of the special tool for laying down grounding down lead of transmission line tower, a sliding lock key is arranged in a fixed sliding groove of the ratchet chamber, the sliding lock key has upper and lower parts, the upper part is used for manual sliding, the lower part is used for locking the self locking pawl, and the upper and lower parts of the sliding lock key are fixed through screws.

[0014] As a preferred scheme of the special tool for laying down grounding down lead of transmission line tower, a length ruler for length detection is further arranged on the fixed sleeve part, and the length ruler is detachably installed

[0015] As a preferred scheme of the special tool for laying the grounding down lead of the transmission line tower, the fixed sleeve part is further provided with a bending angle detector for bending detection.

[0016] As a preferred scheme of the special tool for laying the grounding down lead of the transmission line tower, a rotating shaft seat is installed in the sleeve, and a locking cover is installed at the lower end of the rotating shaft seat.

[0017] The utility model discloses the beneficial effects: portability and convenient operation: through the integration design of fixed sleeve part and force-adding rotating part, the portability and convenient operation of tool are realized.

[0018] High safety: the cooperation of the self-locking pawl in the self-locking part and the ratchet wheel realizes high safety. This structure cooperation can lock the force-adding rotating part during bending, prevent accidental loosening or rebound due to external force, and protect the safety of the operator.

[0019] Practical value: through the cooperation of the sleeve in the fixed sleeve part and the rotating shaft seat, and the operation of the force-adding rod of the force-adding rotating part, the practicality of the tool is realized.

[0020] Simplify operation: the design of the upper and lower parts of the sliding lock key locked by screws simplifies the operation process. This structure cooperation allows the operator to lock and unlock the self-locking part through simple sliding action, reducing the operation difficulty.

[0021] Accurate measurement: the cooperation of the length ruler in the fixed sleeve part and the bending angle detector realizes accurate measurement. This structure cooperation allows the operator to accurately measure and set the required length and angle before bending, ensuring the construction quality.

[0022] Improve construction efficiency: the quick locking and unlocking function of the self-locking part improves the construction efficiency. This structure cooperation reduces the tool adjustment and reset time, making the construction process more smooth.

[0023] Strong adaptability: the structural design of the fixed sleeve part and the force-adding rotating part makes it adapt to various complex field working environments. This structure cooperation makes the tool work stably in narrow space or complex terrain.

[0024] In summary, the patent tool realizes the beneficial effects of portability, safety, practicality, operation simplification, accurate measurement, construction efficiency improvement, strong adaptability and the like through the unique structure cooperation, and provides an efficient, safe and convenient construction solution for users. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 The whole structure of the special tool for laying the grounding down lead of the transmission line tower Figure One .

[0027] Figure 2 The whole structure of the special tool for laying the grounding down lead of the transmission line tower Figure Two .

[0028] Figure 3 The whole structure of the special tool for laying the grounding down lead of the transmission line tower Figure Three .

[0029] Figure 4 The whole structure of the special tool for laying the grounding down lead of the transmission line tower

[0030] Figure 5 The internal schematic diagram of the ratchet chamber of the self-locking part structure of the present application

[0031] Figure 6 The schematic diagram of the fixed sleeve part structure of the present application

[0032] Figure 7 The partial cross-sectional schematic diagram of the special tool for laying the grounding down lead of the transmission line tower of the present application

[0033] In the drawings:

[0034] 100, fixed sleeve part; 101, bending angle device; 102, length ruler; 103, sleeve; 104, rotating shaft seat;

[0035] 200, self-locking part; 201, ratchet; 202, locking cover; 203, ratchet chamber; 204, torsional spring; 205, self-locking ratchet pawl; 206, sliding lock key; 207, fixed pin;

[0036] 300, force-adding rotating component; 301, bent grinding column; 302, bearing; 303, force-adding rod; 304, rotating installation main body. DETAILED DESCRIPTION

[0037] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0038] In the following description, a lot of specific details are set forth in order to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0039] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0040] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in order to facilitate the description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions including length, width and depth should be included in actual production.

[0041] Embodiment 1

[0042] Reference Figures 1-3 , Figures 6-7 For the first embodiment of the present application, a special tool for laying a grounding down lead of a power transmission line tower is provided, which comprises a fixing sleeve device 100 for fixing steel bars, a force-adding rotating component 300 installed on the fixing sleeve device 100, and a self-locking component 200 arranged between the fixing sleeve device 100 and the force-adding rotating component 300.

[0043] In this application, the innovative structure achieves a number of beneficial effects: portability and ease of operation are achieved through the integrated design of the fixed sleeve component 100 and the force-adding rotating component 300, making the tool compact, easy to carry and quick to set up; high safety is provided by the cooperation of the self-locking pawl 205 in the self-locking component 200 and the ratchet 201, which can lock the force-adding rotating component 300 during bending to prevent accidental loosening or rebounding and protect the operator; practical value is reflected in the cooperation of the sleeve 103 and the shaft seat 104104 in the fixed sleeve component 100, as well as the operation of the force-adding rod 303, allowing the tool to be suitable for bending of different specifications of steel bars; simplified operation is achieved by the design of the upper and lower parts of the sliding lock key 206 being locked by screws, allowing the operator to lock and unlock the self-locking component 200 through a simple sliding action; accurate measurement is achieved by the cooperation of the length ruler 102 and the bending angle gauge 101 in the fixed sleeve component 100, allowing the operator to accurately measure and set the required length and angle; improved construction efficiency is achieved by the quick locking and unlocking function of the self-locking component 200, reducing the time for tool adjustment and resetting; strong adaptability is achieved due to the structural design of the fixed sleeve component 100 and the force-adding rotating component 300, allowing the tool to work stably in narrow spaces or complex terrain; ultimately, the advantages of these structural combinations make this tool suitable for widespread use in the laying of tower grounding downlead and similar work, providing an efficient, safe and convenient construction solution that helps to improve the construction standards and efficiency of the entire industry.

[0044] The fixed sleeve device 100 includes a shaft seat 104 and a sleeve 103 installed on the shaft seat 104, and the sleeve 103 has a containing groove on the side for placing steel bars. The force-adding rotating component 300 includes a bending grinding column 301, a force-adding rod 303, and a rotating installation main body 304, wherein the bending grinding column 301 and the force-adding rod 303 are detachably installed on the rotating installation main body 304. The installation between the fixed sleeve device 100 and the force-adding rotating component 300 is achieved by connecting the shaft seat 104 and the rotating installation main body 304 through a bearing 302.

[0045] A length ruler 102 for length detection is also provided on the fixed sleeve device 100 and is detachably installed. A bending angle gauge 101 for bending detection is also provided on the fixed sleeve device 100 and is detachably installed.

[0046] Installation of the fixed sleeve device 100:

[0047] Assembly composition: The fixed sleeve device 100 is composed of a bending angle gauge 101, a length ruler 102, a sleeve 103, and a shaft seat 104104.

[0048] Installation steps: First, the bending angle device 101 and the length ruler 102 are fixed on the upper part of the rotating shaft seat 104104 by bolts, then the sleeve 103 is fixed on the sleeve 103 installation position of the rotating shaft seat 104104, after the above steps are completed, the installation of the fixed sleeve device 100 is completed.

[0049] Installation of the force-adding rotating component 300:

[0050] Component composition: The force-adding rotating component 300 is composed of a bending grinding column 301, a bearing 302, a force-adding rod 303, and a rotating installation main body 304.

[0051] Installation steps: First, the bearing 302 is installed in the rotating installation main body 304, then the bending grinding column 301 is installed in the fixed installation groove of the rotating installation main body 304 and tightened with bolts, finally the force-adding rod 303 is installed on the rotating installation main body 304, after the above steps are completed, the installation of the force-adding rotating component 300 is completed.

[0052] Cooperation of the fixed sleeve device 100 and the force-adding rotating component 300:

[0053] Cooperation steps: The fixed sleeve device 100 is installed on the force-adding rotating component 300, ensuring that the rotating shaft seat 104104 in the fixed sleeve device 100 is installed into the bearing 302 of the force-adding rotating component 300, after the cooperation of the fixed sleeve device 100 and the force-adding rotating component 300 is completed, the self-locking component 200 is installed.

[0054] Improving laying quality and process aesthetics: Through the precise bending angle device 101 and length ruler 102, the operator can ensure that the bending angle and length of the grounding downlead meet the process requirements, thereby improving the laying quality and achieving the effect of process aesthetics.

[0055] Convenient operation: The design of the force-adding rotating component 300 makes the bending process more labor-saving, and through the operation of the force-adding rod 303, the bending of the steel bar can be easily realized, while reducing the physical exertion of the operator during field operation.

[0056] Adapting to complex environment and improving efficiency: The integrated design of the fixed sleeve device 100 and the force-adding rotating component 300 makes the entire tool more compact, facilitating the use in narrow spaces or complex terrain construction sites.

[0057] In summary, the design and installation process of the tool fully considers the convenience, safety, and efficiency of field operation, which can effectively improve the laying quality of the grounding downlead of the transmission line tower, reduce the grounding resistance, and thereby improve the lightning withstand level and operation reliability of the entire transmission line.

[0058] Example 2

[0059] Reference Figures 2-7 For the second embodiment of the utility model, which is different from the first embodiment: in order to ensure that the force-adding rotating part 300 does not loosen or rebound accidentally due to external force during the bending process, thereby avoiding injury to the operator, ensuring that the bending precision meets the process requirements, preventing angle deviation caused by device loosening, and improving work efficiency and reducing tool adjustment time, a self-locking part 200 is further provided in the tool. This design can effectively lock the bending position and prevent accidental rebound, ensuring the smoothness and safety of the operation process, while also reducing damage to the force-adding rotating part 300 caused by improper operation or accidents, prolonging the service life of the tool, and reducing maintenance costs.

[0060] The self-locking part 200 includes a ratchet chamber 203 installed below the rotating shaft seat 104, a locking cover 202 installed at the lower end of the rotating shaft seat 104, a ratchet 201 and a corresponding self-locking pawl 205 arranged in the ratchet chamber 203. A torsional spring 204 is arranged in the self-locking pawl 205, which is sleeved on a fixed pin 207 installed on the rotating shaft seat 104. A sliding lock key 206 is arranged in the fixed sliding groove of the ratchet chamber 203, which is divided into upper and lower parts, the upper part is used for manual sliding, and the lower part is used for locking the self-locking pawl 205. The upper and lower parts of the sliding lock key 206 are fixed by screws.

[0061] Components and installation of the self-locking part 200:

[0062] Components: the self-locking part 200 is composed of a ratchet 201, a locking cover 202, a ratchet chamber 203, a torsional spring 204, a self-locking pawl 205, a sliding lock key 206, and a fixed pin 207.

[0063] Installation steps: first, install the ratchet chamber 203 on the force-adding rotating part 300, then install the ratchet 201 in the rotating shaft seat 104104 of the force-adding rotating part 300 integrated with the fixed sleeve device 100, and then install the torsional spring 204, the self-locking pawl 205, and the fixed pin 207 together. The specific operation is to first place the torsional spring 204 in the self-locking pawl 205, then install the self-locking pawl 205 in the fixed pin 207 installation slot in the ratchet chamber 203 and the force-adding rotating part 300. Next, install the sliding lock key 206 in the fixed sliding groove of the ratchet chamber 203, which is divided into upper and lower parts, the upper part is used for manual sliding, and the lower part is used for locking the self-locking pawl 205, the upper and lower parts are locked by screws. Finally, install the locking cover 202 in the rotating shaft seat 104104 of the entire device to complete the locking.

[0064] Improving operational safety: The design of the self-locking component 200 ensures that during the grounding downline laying process, especially during the bending process, injuries caused by rebound can be prevented. The cooperation of the self-locking pawl 205 and the ratchet wheel 201 provides a stable locking mechanism, ensuring that the tool will not be accidentally released during the bending process.

[0065] Enhancing the stability and reliability of the tool: The addition of the torsion spring 204 provides the necessary elastic force for the self-locking pawl 205, enabling the self-locking component 200 to remain stable under various operating conditions, enhancing the reliability of the tool. The fixed pin 207 ensures the fixed position of the self-locking pawl 205 in the ratchet wheel chamber 203, preventing displacement during operation, thereby ensuring bending accuracy.

[0066] Improving operational convenience: The design of the sliding lock key 206 allows the operator to easily lock and unlock the self-locking pawl 205, enabling the tool to quickly switch states during different operating stages, improving work efficiency. The installation of the locking cover 202 provides additional protection for the entire self-locking component 200, preventing dust and debris from entering, prolonging the service life of the tool.

[0067] In summary, the design and installation process of the self-locking component 200 fully considers the safety of operation, the stability of the tool, and the convenience of operation, which are crucial for improving the efficiency and safety of grounding downline laying for power line towers. Through this design, it can be ensured that the grounding downline laying work can be safely and efficiently carried out in complex outdoor environments.

[0068] The rest of the structure is the same as that of the embodiment.

[0069] Embodiment 3

[0070] Referring to Figures 1-7 , the third embodiment of the utility model, which is different from the second embodiment is: a method for using a special tool for grounding downline laying of power line towers, which includes a special tool for grounding downline laying of power line towers, and further includes the following steps: locking the self-locking component 200; preliminary bending installation; fixing the bending length; starting bending; judging the bending angle; ending bending and resetting.

[0071] Specifically:

[0072] Locking the self-locking component 200: Before starting the bending operation, slide the sliding lock key 206 to the right to lock the self-locking pawl 205, ensuring safety during the bending process.

[0073] Preliminary bending installation: Place the steel bar to be bent into the sleeve 103 in the fixed sleeve device 100, and pass through the shaft seat 104104, completing the preliminary bending installation.

[0074] Fixed bending length: If a specific bending length needs to be fixed, the length ruler 102 can be used to measure the desired length, and the reinforcement position can be adjusted to the desired length and then fixed.

[0075] Start bending: Hold the force lever 303 of the force rotating part 300, start the rotating device to bend. During rotation, the self-locking pawl 205 will rotate with the rotation of the force rotating part 300, and continuously engage the ratchet 201, complete self-locking, prevent rebound during bending, and ensure operation safety.

[0076] Determine the bending angle: Determine and adjust the desired bending angle by observing the position between the bending angle gauge 101 and the bending grinding column 301.

[0077] End bending and reset: After bending is completed, the self-locking pawl 205 needs to be unlocked, which is achieved by sliding the sliding lock key 206 to the left. After unlocking, the force rotating part 300 can be reset to the initial state, preparing for the next bending operation.

[0078] Beneficial effects are:

[0079] Improve operation safety: Through the cooperation of the sliding lock key 206 and the self-locking pawl 205, the operator can ensure that the device is locked before bending, preventing accidental rebound and reducing the risk of injury during operation.

[0080] Improve bending accuracy: The provision of the bending angle gauge 101 and the length ruler 102 enables the operator to accurately control the bending angle and length, meeting process requirements and improving the quality of grounding downline laying.

[0081] Improve work efficiency: The design of the force rotating part 300 makes the bending process more labor-saving and fast, reducing physical labor and improving work efficiency. The quick locking and unlocking function of the self-locking part 200 enables the tool to quickly reset, reducing waiting time during operation.

[0082] Adapt to complex environment: The design of the tool takes into account the use requirements in complex outdoor environments, simplifying the operation steps and improving the stability of the tool, enabling efficient use in narrow or complex terrain construction sites.

[0083] In summary, the operation process of the special tool for laying grounding downline of power transmission line towers is simple and efficient, which can ensure operation safety while improving bending accuracy and work efficiency, and is very suitable for laying grounding downline in various environments.

[0084] The remaining structure is the same as that of the embodiment.

[0085] It is important to note that the construction and arrangements of the application shown in the various exemplary embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in the application. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements can be altered or varied. Accordingly, all such modifications are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be varied or re-sequenced without materially affecting the application. Accordingly, the general principles defined herein can be applied to a wide variety of alternative embodiments. Thus, the present application is not limited to the preferred embodiments described herein, but is to be accorded the full scope consistent with the claims, the full scope being dictated by the claims.

[0086] Furthermore, in order to provide a concise description of illustrative embodiments, not all features of an actual implementation can be described (i.e., those pertaining to the

[0087] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application, not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, which should be covered by the scope of the claims of the present application.

Claims

1. A special tool for laying a ground down lead of a transmission line tower, characterized in that: The utility model provides a kind of steel bar fixing device, including fixing sleeve component (100) for fixing steel bar, and force adding rotating component (300) installed on the fixing sleeve component (100), and self-locking component (200) is arranged between the fixing sleeve component (100) and the force adding rotating component (300).

2. The grounding down conductor laying tool for transmission line towers according to claim 1, characterized in that: The fixing sleeve component (100) includes a rotating shaft seat and a sleeve (103) installed on the rotating shaft seat, with a receiving groove for placing steel bars on the side of the sleeve (103).

3. The grounding down conductor laying tool for transmission line towers according to claim 2, characterized in that: The force adding rotating component (300) includes a bent grinding column (301), a force adding rod (303), and a rotating installation body (304), wherein the bent grinding column (301) and the force adding rod (303) are detachably installed on the rotating installation body (304).

4. The grounding down conductor laying tool for transmission line towers according to claim 3, characterized in that: The installation between the fixing sleeve component (100) and the force adding rotating component (300) is achieved by connecting the rotating shaft seat and the rotating installation body (304) through a bearing (302).

5. The tool according to claim 4, characterized in that: The self-locking component (200) includes a ratchet chamber (203) installed below the rotating shaft seat, with a ratchet (201) and a self-locking pawl (205) corresponding thereto arranged in the ratchet chamber (203).

6. The tool according to claim 5, characterized in that: A torsion spring (204) is arranged in the self-locking pawl (205), which is sleeved on a fixed pin (207) installed on the rotating shaft seat.

7. The grounding down conductor laying tool for transmission line towers according to claim 5, characterized in that: A sliding lock key (206) is arranged in the fixed sliding groove of the ratchet chamber (203), which is divided into upper and lower parts, with the upper part used for manual sliding and the lower part used for locking the self-locking pawl (205). The upper and lower parts of the sliding lock key (206) are fixed by screws.

8. The tool according to claim 1, characterized in that: A length ruler (102) for length detection is further arranged on the fixing sleeve component (100), which is detachably installed.

9. The grounding down conductor laying tool for transmission line tower according to claim 1, characterized in that: A bending angle detector (101) for bending detection is further arranged on the fixing sleeve component (100), which is detachably installed.

10. The tool according to claim 1, characterized in that: A rotating shaft seat (104) is installed in the sleeve (103), with a locking cover (202) installed at the lower end of the rotating shaft seat (104).

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