A steel sleeve connecting positioning device adaptable to different sizes

Abstract

The application discloses a steel sleeve connecting and positioning device suitable for different sizes, and relates to the technical field of building construction. The device comprises a positioning disc and a motor. The outer surface of the positioning disc is provided with a correction assembly for position correction. The correction assembly comprises a first adjusting frame, a first servo motor, a second adjusting frame and a second servo motor. One end of the first adjusting frame is provided with the first servo motor. The upper end of the first adjusting frame is externally provided with the second adjusting frame. The end of the second adjusting frame is provided with the second servo motor. The output ends of the first servo motor and the second servo motor are both provided with a lead screw. The steel sleeve connecting and positioning device is suitable for different sizes. The design of the correction assembly facilitates position adjustment and correction when the steel sleeve after limiting and the pre-connector are offset, and facilitates quick alignment of the steel sleeve and the pre-connector. The device saves time and effort without the need for repeated observation and alignment by an operator.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a steel sleeve connection and positioning device that can adapt to different sizes. Background Technology

[0002] Because the precast frame columns use sleeve connections for the reinforcement bars, the reinforcement bars are cast inside the columns to provide support for the building, making it more robust. However, the reinforcement details are not easy to observe.

[0003] Currently, the steel pipe sleeve requires manual observation and multiple calibrations for placement and installation, which consumes a lot of time to align the steel pipe sleeve with the pre-connector, making the operation inconvenient.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and proposed a steel sleeve connection and positioning device that can adapt to different sizes. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a steel sleeve connection and positioning device that can adapt to different sizes, thus solving the problems mentioned in the background section.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions: A steel sleeve connection positioning device adaptable to different sizes, including a positioning disc and a motor. A correction component for position correction is provided on the outer surface of the positioning disc, and the correction component includes a first adjustment frame, a first servo motor, a second adjustment frame, and a second servo motor. A first servo motor is provided at one end of the first adjustment frame, and a second adjustment frame is installed on the upper outer surface of the first adjustment frame. A second servo motor is provided at the end of the second adjustment frame. The output ends of the first servo motor and the second servo motor are both equipped with screw rods. A connecting built-in slide is threadedly installed on the outer surface of a group of screw rods. The motor is arranged on both sides inside the connecting built-in slide, and a connecting shaft is installed at the output end of the motor. The end of the connecting shaft is connected to a connecting shaft, and a positioning component for positioning is provided at the end of the connecting shaft. The positioning component includes a first gear, a second gear, a first connecting rod, a second connecting rod, a connecting plate, and a positioning plate. The outer surface of the first gear is meshed with the second gear. A second connecting rod is provided at the top of the second gear, and a first connecting rod is installed at the top of the first gear. Connecting plates are rotatably provided at the tops of the first connecting rod and the second connecting rod, and a positioning plate is installed on the outer surface of one side of the connecting plate. A connecting component for position adjustment is fixedly installed at the bottom of one side of the connecting built-in slide through screws. The connecting component includes a first air rod, a transfer cylinder, and a second air rod. The output end of the first air rod is installed with a transfer cylinder, and a second air rod is provided on the outer surface of the transfer cylinder. The output end of the second air rod is installed with an auxiliary component for position alignment. The auxiliary component includes a middle disc, a GPS receiver, an electric push rod, and a backing plate. A GPS receiver is provided in the middle of the middle disc, and an electric push rod is provided on the outer surface of the middle disc. The output end of the electric push rod is installed with a backing plate.

[0007] Further, the positioning components and the auxiliary components are distributed in a one-to-one correspondence, and two groups of positioning components and auxiliary components are provided.

[0008] Further, the inside of the connecting built-in slide is of a hollow structure, and an auxiliary cover is snap-fitted on the top of the connecting built-in slide.

[0009] Further, the positioning plate is of a semi-circular structure, and four groups of positioning plates are provided.

[0010] Further, four hanging rings are annularly provided on the outer surface of the positioning disc, and a positioning screw is threadedly installed inside the hanging ring, and a fixing cap is threadedly provided at the end of the positioning screw.

[0011] Further, an auxiliary frame is provided on the outer surface of the fixing cap, and the auxiliary frame is of a "square" structure.

[0012] Furthermore, the bottom of the positioning disk is provided with a bottom frame, and a connecting column is fixedly installed inside the bottom frame by screws.

[0013] Furthermore, a guide plate is rotatably mounted on the end of the connecting column, and two sets of guide plates are provided. A hydraulic cylinder is installed between the two sets of guide plates, and a mounting bracket is provided at the output end of the hydraulic cylinder.

[0014] Furthermore, a connecting sleeve plate is provided on one outer surface of the bottom frame, and a connecting ring is rotatably installed inside the connecting sleeve plate.

[0015] Furthermore, a connecting block is fixedly provided on the outer surface of the connecting ring, and the connecting block and the bottom outer surface of the positioning disk are an integrated structure.

[0016] This invention provides a steel sleeve connection and positioning device that can adapt to different sizes, and has the following beneficial effects:

[0017] 1. This steel sleeve connection and positioning device, which can adapt to different sizes, is designed with a correction component to facilitate position adjustment and correction when there is a misalignment between the steel sleeve and the pre-connector after the limit is set. This allows for quick alignment of the steel sleeve and the pre-connector without the need for operators to repeatedly observe and align, saving time and effort.

[0018] 2. This steel sleeve connection and positioning device, adaptable to different sizes, utilizes a positioning component, auxiliary component, and connecting component design. It allows for external positioning and fixing of the steel sleeve. The adjustable deployment range of the positioning plate facilitates positioning and fixing of steel sleeves of different sizes, reducing usage limitations and simplifying connection. After positioning the steel sleeve, the connecting component adjusts the position of the central plate, ensuring the GPS receiver in the center of the central plate coincides with the center of the positioned steel sleeve. Simultaneously, an electric push rod moves the pad, allowing for internal fixing by adjusting the distance of the pad from inside the steel sleeve. The pad's length can be stacked using screws, facilitating insertion and fixing into the steel sleeve. This reinforces the steel sleeve while the GPS receiver assists in aligning the steel sleeve with the pre-connected fitting. The pre-placement of a GPS generator at the center of the pre-connected fitting, along with the GPS receiver design, allows for continuous alignment correction between the steel sleeve and the pre-connected fitting without repeated operator observation, effectively reducing installation time and labor-saving.

[0019] 3. This steel sleeve connection and positioning device, which can adapt to different sizes, features a four-ring design that facilitates connection to a crane by the operator, making it easy to lift and install the steel sleeve after it has been positioned. When lifting and installation are not required, the positioning screw can be rotated in the opposite direction to fix one end to the ring thread, and the other end of the positioning screw can be rotatably connected to the auxiliary frame, allowing the bottom of the auxiliary frame to be placed on the ground. By manually controlling the positioning disc connected to the ring, the positioning disc can be rotated inside the auxiliary frame, allowing the operator to manually control the positioning disc to align the steel sleeve with the pre-connected part. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a steel sleeve connection and positioning device that can adapt to different sizes according to the present invention.

[0021] Figure 2 This is a schematic diagram of the connecting built-in slide block connection structure of a steel sleeve connection and positioning device that can adapt to different sizes according to the present invention;

[0022] Figure 3 This is a schematic diagram of the auxiliary frame connection structure of a steel sleeve connection and positioning device that can adapt to different sizes according to the present invention;

[0023] Figure 4 This is a schematic diagram of the internal connection structure of the connecting built-in slide of a steel sleeve connection and positioning device that can adapt to different sizes according to the present invention.

[0024] Figure 5 This is a bottom view schematic diagram of the positioning disk connection structure of a steel sleeve connection and positioning device that can adapt to different sizes according to the present invention.

[0025] Figure 6 This is a schematic diagram of the internal structure of the bottom frame of a steel sleeve connection and positioning device that can adapt to different sizes according to the present invention.

[0026] In the diagram: 1. Positioning plate; 2. Auxiliary frame; 3. Correction assembly; 301. First adjustment frame; 302. First servo motor; 303. Second adjustment frame; 304. Second servo motor; 4. Positioning assembly; 401. First gear; 402. Second gear; 403. First connecting rod; 404. Second connecting rod; 405. Connecting plate; 406. Positioning plate; 5. Auxiliary assembly; 501. Middle plate; 502. GPS receiver; 503. Electric... 504. Push rod; 6. Pad plate; 7. Connecting assembly; 8. First air rod; 9. Adapter cylinder; 10. Second air rod; 11. Fixing cap; 12. Positioning screw; 13. Motor; 14. Connecting shaft; 15. Connecting shaft; 16. Base frame; 17. Connecting ring; 18. Connecting block; 19. Connecting sleeve plate; 20. Connecting column; 21. Guide plate; 22. Hydraulic cylinder; 33. Mounting bracket; 44. Connecting internal slide; 55. Auxiliary cover; 66. Hanging ring. Detailed Implementation

[0027] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0028] like Figure 1 , Figure 2 , Figure 4 and Figure 6As shown, the present invention provides a technical solution: a steel sleeve connection and positioning device adaptable to different sizes, comprising a positioning plate 1, an auxiliary frame 2, a correction component 3, a first adjustment frame 301, a first servo motor 302, a second adjustment frame 303, a second servo motor 304, a positioning component 4, a first gear 401, a second gear 402, a first connecting rod 403, a second connecting rod 404, a connecting plate 405, a positioning plate 406, an auxiliary component 5, a middle plate 501, a GPS receiver 502, an electric push rod 503, a pad 504, a connecting component 6, a first air rod 601, an adapter cylinder 602, a second air rod 603, a fixing cap 7, a positioning screw 8, a motor 9, a connecting shaft 10, a connecting shaft 11, a bottom frame 12, and a connecting ring 13. The positioning disk 1 has a connecting block 14, a connecting sleeve 15, a connecting column 16, a guide plate 17, a hydraulic cylinder 18, a mounting bracket 19, a connecting built-in slide 20, an auxiliary cover 21, and a hanging ring 22. The outer surface of the positioning disk 1 is provided with a correction component 3 for position correction. The correction component 3 includes a first adjusting frame 301, a first servo motor 302, a second adjusting frame 303, and a second servo motor 304. One end of the first adjusting frame 301 is provided with the first servo motor 302, and the upper outer surface of the first adjusting frame 301 is fitted with the second adjusting frame 303. The end of the second adjusting frame 303 is provided with the second servo motor 304. Lead screws are installed at the output ends of both the first servo motor 302 and the second servo motor 304. A set of lead screws has threads on their outer surfaces. Equipped with a connecting built-in slide 20, the first servo motor 302 drives the lead screw to rotate, thereby causing the second adjustment frame 303, which is threadedly connected to the lead screw, to move horizontally. The second servo motor 304 drives the connecting built-in slide 20 outside the lead screw to move, facilitating longitudinal and lateral movement of the connecting built-in slide 20 according to position requirements. The motor 9 is located on both sides inside the connecting built-in slide 20, and the output end of the motor 9 is equipped with a connecting shaft 10. The end of the connecting shaft 10 is connected to a connecting shaft 11. The end of the connecting shaft 11 is equipped with a positioning component 4 for positioning, and the positioning component 4 includes a first gear 401, a second gear 402, a first connecting rod 403, and a second connecting rod 404. 04. Connecting plate 405 and positioning plate 406: The outer surface of the first gear 401 is meshed with the second gear 402. The top of the second gear 402 is provided with a second connecting rod 404. The top of the first gear 401 is installed with a first connecting rod 403. The tops of both the first connecting rod 403 and the second connecting rod 404 are rotatably connected with the connecting plate 405. A positioning plate 406 is installed on one outer surface of the connecting plate 405. The positioning plate 406 has a semi-circular structure and is provided with four sets. Through the design of the motor 9, connecting shaft 10 and connecting shaft 11, the second gear 402 can be driven to rotate. The second gear 402 meshes with the first gear 401, so that the second gear 402 and the first gear 401 will rotate downward synchronously.This allows the connecting plate 405 and positioning plate 406 at the top of the first connecting rod 403 and the second connecting rod 404 to move closer together. The shape and structure of the positioning plate 406 allows for external positioning and fixing of the steel sleeve. The adjustable unfolding range of the positioning plate 406 facilitates positioning and fixing of steel sleeves of different sizes, reducing usage limitations and simplifying the connection and use of steel sleeves.

[0029] like Figure 2 As shown, a connecting component 6 for position adjustment is fixedly installed on the bottom side of the built-in slide 20 by screws. The connecting component 6 includes a first gas spring 601, an adapter cylinder 602, and a second gas spring 603. The adapter cylinder 602 is installed at the output end of the first gas spring 601, and the second gas spring 603 is provided on the outer surface of the adapter cylinder 602. The design of the first gas spring 601 can drive the adapter cylinder 602 to move, so that the second gas spring 603 connected to the adapter cylinder 602 can move synchronously, which is convenient for adaptive adjustment according to the position of the steel sleeve end. An auxiliary component 5 for position alignment is installed at the output end of the second gas spring 603. The auxiliary component 5 includes a middle plate 501, a GPS receiver 502, an electric push rod 503, and a pad 504. The GPS receiver 502 is provided in the middle of the middle plate 501, and the electric push rod 503 is provided on the outer surface of the middle plate 501. The pad 504 is installed at the output end of the electric push rod 503. The positioning component 4 and the auxiliary component 5 are one-to-one. Correspondingly distributed, and with two sets of positioning components 4 and auxiliary components 5, after positioning the steel sleeve, the position of the middle plate 501 is adjusted by the connecting component 6, so that the GPS receiver 502 in the middle of the middle plate 501 coincides with the center of the positioned steel sleeve. At the same time, the design of the electric push rod 503 drives the position of the pad 504 to move, which facilitates internal fixing by adjusting the distance of the pad 504 from inside the steel sleeve. The length of the pad 504 can be stacked with screws to install the pad 504, which is convenient for the pad 504 to extend into the inside of the steel sleeve for fixing. This can strengthen the steel sleeve, and the design of the GPS receiver 502 assists in the alignment of the steel sleeve with the pre-connected pipe fitting. By pre-placing the GPS generator in the center of the pre-connected pipe fitting, and the design of the GPS receiver 502, the position between the steel sleeve and the pre-connected fitting can be continuously corrected and aligned without the need for repeated observation by the operator, which effectively reduces the installation time between the steel sleeve and the pre-connected fitting and is more labor-saving.

[0030] like Figure 1 , Figure 3 and Figure 4As shown, the interior of the connecting built-in slide 20 has a hollow structure, and an auxiliary cover 21 is fitted onto the top of the connecting built-in slide 20. The design of the auxiliary cover 21 can store and protect the internal components of the connecting built-in slide 20, reducing the possibility of damage. Four hanging rings 22 are arranged in a ring on the outer surface of the positioning plate 1, and positioning screws 8 are installed in the internal threads of the hanging rings 22. The end of the positioning screw 8 is threaded with a fixing cap 7, and the outer surface of the fixing cap 7 is provided with an auxiliary frame 2. The auxiliary frame 2 has a "U"-shaped structure. By rotating the positioning screw 8, it can be engaged with the hanging rings 22. The four hanging rings 22 are designed to facilitate the operation of the crane to connect with the steel sleeve after it has been positioned. When no lifting or installation is required, the positioning screw 8 can be rotated in the opposite direction to fix one end of it to the hanging ring 22. The other end of the positioning screw 8 is rotatably connected to the auxiliary frame 2, so that the bottom of the auxiliary frame 2 can be placed on the ground. The positioning disc 1 connected to the hanging ring 22 can be manually controlled to rotate inside the auxiliary frame 2, so that the operator can manually control the positioning disc 1 to align the steel sleeve with the pre-connected part.

[0031] like Figure 5 and Figure 6 As shown, the bottom of the positioning disk 1 is provided with a bottom frame 12, and a connecting column 16 is fixedly installed inside the bottom frame 12 by screws. A guide plate 17 is rotatably installed at the end of the connecting column 16, and there are two sets of guide plates 17. A hydraulic cylinder 18 is installed between the two sets of guide plates 17, and a mounting bracket 19 is provided at the output end of the hydraulic cylinder 18. A connecting sleeve plate 15 is provided on one side of the outer surface of the bottom frame 12, and a connecting ring 13 is rotatably installed inside the connecting sleeve plate 15. A connecting block 14 is fixedly installed on the outer surface of the connecting ring 13, and the connecting block 14 and the bottom outer surface of the positioning disk 1 are integrated. The design of the connecting ring 13, the connecting block 14 and the connecting sleeve plate 15 allows the bottom frame 12 to be rotated. This allows the positioning device to be used without hoisting, so that the bottom frame 12 contacts the ground and the mounting bracket 19 is connected to one side of the outer surface of the positioning disk 1 by screws. The hydraulic cylinder 18 can then drive the positioning disk 1 to adjust its angle, reducing the manual input of the user and facilitating the connection and use of the steel sleeve.

[0032] In summary, as Figures 1-6As shown, this steel sleeve connection and positioning device, which can adapt to different sizes, allows operators to easily connect it to a crane via the design of four hanging rings 22, facilitating the lifting and installation of the steel sleeve after it has been positioned. When lifting and installation are not required, one end of the positioning screw 8 can be threaded onto the hanging ring 22 by rotating it in the reverse direction, and the other end of the positioning screw 8 is rotatably connected to the auxiliary frame 2, allowing the bottom of the auxiliary frame 2 to be placed on the ground. By manually controlling the positioning disc 1 connected to the hanging ring 22, the positioning disc 1 can be rotated within the auxiliary frame 2, allowing the operator to manually control the positioning disc 1 to align the steel sleeve with the pre-connected part. The design of the connecting ring 13, connecting block 14, and connecting sleeve plate 15 allows the bottom frame 12 to rotate, thereby... When the positioning device does not require hoisting, the base frame 12 contacts the ground, and the mounting bracket 19 is connected to the outer surface of one side of the positioning plate 1 via screws. This allows the positioning plate 1 to be adjusted in angle via the hydraulic cylinder 18, reducing the user's manual effort and facilitating connection to the steel sleeve. The design of the motor 9, connecting shaft 10, and connecting shaft 11 drives the second gear 402 to rotate, and the second gear 402 meshes with the first gear 401. Thus, the second gear 402 and the first gear 401 rotate downwards synchronously, causing the connecting plate 405 and the positioning plate 406 at the top of the first connecting rod 403 and the second connecting rod 404 to move closer together. The shape and structure of the positioning plate 406 allows for external positioning of the steel sleeve. The adjustable unfolding range of the positioning plate 406 facilitates the positioning and fixing of steel sleeves of different sizes, reducing usage limitations and simplifying connection. After positioning the steel sleeve, the position of the central plate 501 is adjusted via the connecting component 6, ensuring that the GPS receiver 502 in the center of the central plate 501 coincides with the center of the positioned steel sleeve. Simultaneously, the electric push rod 503 moves the pad 504, allowing for internal fixing by adjusting the distance of the pad 504 from inside the steel sleeve. The length of the pad 504 can be stacked using screws, facilitating its insertion into the steel sleeve for fixation. This reinforces the steel sleeve while the GPS receiver 502 assists in its installation. The alignment with the pre-connected pipe fittings is achieved through a GPS generator and receiver 502 pre-placed at the center of the pre-connected pipe fittings. This design facilitates continuous alignment and correction between the steel sleeve and the pre-connected fittings without requiring repeated observation by the operator. This effectively reduces installation time and is more labor-saving. During alignment, the first servo motor 302 drives the lead screw to rotate, which in turn moves the second adjustment frame 303, threaded to the lead screw, horizontally. The second servo motor 304 moves the connecting internal slide 20 outside the lead screw, allowing for longitudinal and lateral movement of the connecting internal slide 20 as needed.To achieve position correction.

[0033] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A steel sleeve connection and positioning device adaptable to different sizes, comprising a positioning disc (1) and a motor (9), characterized in that: The outer surface of the positioning disk (1) is provided with a correction component (3) for position correction. The correction component (3) includes a first adjustment frame (301), a first servo motor (302), a second adjustment frame (303), and a second servo motor (304). One end of the first adjustment frame (301) is provided with the first servo motor (302), and the upper outer surface of the first adjustment frame (301) is provided with the second adjustment frame (303). The end of the second adjustment frame (303) is provided with the second servo motor (304). The output ends of the first servo motor (302) and the second servo motor (304) are both provided with... A lead screw, a set of lead screws with a connecting built-in slide (20) threaded on the outer surface, the motor (9) is disposed on both sides inside the connecting built-in slide (20), and the output end of the motor (9) is mounted with a connecting shaft (10), the end of the connecting shaft (10) is connected to a connecting shaft (11), the end of the connecting shaft (11) is provided with a positioning component (4) for positioning, and the positioning component (4) includes a first gear (401), a second gear (402), a first connecting rod (403), a second connecting rod (404), a connecting plate (405) and a positioning plate (406), the outer surface of the first gear (401) meshing with the connecting shaft (20). A second gear (402) is connected, and a second connecting rod (404) is provided on the top of the second gear (402). A first connecting rod (403) is installed on the top of the first gear (401). A connecting plate (405) is rotatably provided on the top of both the first connecting rod (403) and the second connecting rod (404). A positioning plate (406) is installed on one side of the outer surface of the connecting plate (405). A connecting component (6) for position adjustment is fixedly installed on the bottom side of the connecting built-in slide (20) by screws. The connecting component (6) includes a first air rod (601), an adapter cylinder (602), and a second air rod (603). The output end of the first air rod (601) is equipped with an adapter tube (602), and the outer surface of the adapter tube (602) is provided with a second air rod (603). The output end of the second air rod (603) is equipped with an auxiliary component (5) for position alignment. The auxiliary component (5) includes a central plate (501), a GPS receiver (502), an electric push rod (503), and a pad (504). The central plate (501) is provided with a GPS receiver (502) in the middle, and the outer surface of the central plate (501) is provided with an electric push rod (503). The output end of the electric push rod (503) is equipped with a pad (504).

2. The steel sleeve connection and positioning device adaptable to different sizes according to claim 1, characterized in that: The positioning component (4) and the auxiliary component (5) are distributed in a one-to-one correspondence, and there are two sets of positioning component (4) and auxiliary component (5).

3. The steel sleeve connection and positioning device adaptable to different sizes according to claim 1, characterized in that: The interior of the connecting built-in slide (20) has a hollow structure, and an auxiliary cover (21) is fitted onto the top of the connecting built-in slide (20).

4. The steel sleeve connection and positioning device adaptable to different sizes according to claim 1, characterized in that: The positioning plate (406) has a semi-circular structure and is provided with four sets.

5. The steel sleeve connection and positioning device adaptable to different sizes according to claim 1, characterized in that: Four hanging rings (22) are annularly arranged on the outer surface of the positioning disc (1), and a positioning screw rod (8) is threadedly installed inside the hanging ring (22), and a fixing cap (7) is threadedly arranged at the end of the positioning screw rod (8).

6. A steel sleeve connection and positioning device adaptable to different sizes according to claim 5, characterized in that: An auxiliary frame (2) is arranged on the outer surface of the fixing cap (7), and the auxiliary frame (2) is in a "mouth" - shaped structure.

7. The steel sleeve connection and positioning device adaptable to different sizes according to claim 1, characterized in that: A bottom frame (12) is arranged at the bottom of the positioning disc (1), and a connecting column (16) is fixedly installed inside the bottom frame (12) by screws.

8. A steel sleeve connection and positioning device adaptable to different sizes according to claim 7, characterized in that: A guide plate (17) is rotatably installed at the end of the connecting column (16), and there are two groups of guide plates (17). A hydraulic cylinder (18) is installed between the two groups of guide plates (17), and an installation frame (19) is arranged at the output end of the hydraulic cylinder (18).

9. A steel sleeve connection and positioning device adaptable to different sizes according to claim 7, characterized in that: A connecting sleeve plate (15) is arranged on one outer surface of the bottom frame (12), and a connecting ring (13) is rotatably installed inside the connecting sleeve plate (15).

10. A steel sleeve connection and positioning device adaptable to different sizes according to claim 9, characterized in that: A connecting block (14) is fixedly arranged on the outer surface of the connecting ring (13), and the connecting block (14) and the outer surface of the bottom of the positioning disc (1) are of an integrated structure.

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