Novel rudder blade manhole mounting cover structure

Abstract

The utility model relates to the technical field of ship rudder blade installation covers, and discloses a novel rudder blade manhole installation cover structure which comprises a rudder blade body, a manhole is formed in the outer surface of the rudder blade body, an installation cover plate is arranged outside the manhole, two upper hinges are fixedly installed on the outer surface of the installation cover plate, and the upper hinges are fixedly installed on the outer surface of the installation cover plate. Two lower hinges are fixedly installed on the outer surface of the rudder blade body, an adjusting disc is fixedly connected to the rear end of a rotating shaft, L-shaped plates are fixedly connected to the outer surfaces of the tops of the two sliding blocks, and baffles are arranged at the positions, located at the front ends of the L-shaped plates, of the left side and the right side of an inserting cylinder. And by rotating the rotating disc, driving the connecting rod, enabling the connecting rod to drive the sliding block, enabling the L-shaped plate to be retracted into the insertion barrel, and relieving limiting of the adjusting frame and the locking frame, so that limiting between the rudder blade body and the mounting cover plate is relieved, and when the mounting cover plate is closed and opened, excessive bolts do not need to be disassembled, the mounting cover plate can be quickly opened, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of ship rudder blade installation covers, in particular to a novel structure of a manhole installation cover for a rudder blade. Background Technique

[0002] The rudder blade installation cover is mainly a manhole cover opened to facilitate entering the inside of the rudder blade for installation and connection operations with the rudder stock when installing the rudder blade. Shipyards generally spot-weld the installation cover near the opening during the rudder blade installation stage.

[0003] The cover plate is provided with bolt through holes. One side of the seat plate is fixedly connected to the cover plate through bolts and nuts, and the other side is connected to the end face of the rudder plate. When fixing, the bolt head is buried in the counterbore on the cover plate, and at the same time, an adhesive curing agent is filled in the gap of the counterbore to ensure the firmness and sealing performance of the connection. However, when the cover plate needs to be opened, multiple bolts need to be unscrewed and disassembled. On the one hand, it is time-consuming and laborious, and on the other hand, the bolts may be lost. In addition, the safety cannot be guaranteed, and high-altitude falling may occur when operating to open or close, there are safety hazards. Therefore, a novel structure of a manhole installation cover for a rudder blade is proposed. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a novel structure of a manhole installation cover for a rudder blade to solve the problems mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A novel structure of a manhole installation cover for a rudder blade, including a rudder blade body, a manhole is opened on the outer surface of the rudder blade body, an installation cover plate is arranged outside the manhole, two upper hinges are fixedly installed on the outer surface of the installation cover plate, two lower hinges are fixedly installed on the outer surface of the rudder blade body, through holes are opened between the upper hinges and the lower hinges, bolts are arranged inside the through holes, and nuts are threadedly connected to the outer surfaces of the bolts;

[0006] A locking frame is fixedly connected to the right side of the rudder blade body where the installation cover plate is located. An L-shaped frame is fixedly connected to the front outer surface of the installation cover plate near the locking frame. The other end of the L-shaped frame is fixedly connected to an adjustment frame. A rotating shaft rotatably penetrates through the outer surface of the adjustment frame. The rear end of the rotating shaft is fixedly connected to an adjustment disk. An insertion cylinder is fixedly connected to the rear outer surface of the adjustment frame. The insertion cylinder is located outside the adjustment disk. Two link rods arranged symmetrically left and right are rotatably connected to the outer surface of the adjustment disk. The other ends of the two link rods away from the adjustment disk are rotatably connected to sliders. L-shaped plates are fixedly connected to the top outer surfaces of the two sliders. Through grooves are opened on the left and right outer surfaces of the insertion cylinder. The L-shaped plates are movably connected to the inside of the through grooves. Baffles are arranged at the front ends of the left and right sides of the insertion cylinder where the L-shaped plates are located.

[0007] As a further description of the present utility model, a storage seat is fixedly connected to the front outer surface of the installation cover plate. A nylon rope is fixedly connected to the inside of the storage seat. The other end of the nylon rope is fixedly connected to a connection block. A limiting seat is fixedly connected to the front outer surface of the rudder blade on the left side of the installation cover plate. A first pull rod is movably inserted into the left outer surface of the limiting seat. A first disc is fixedly connected to the left outer surface of the first pull rod. A first spring is fixedly connected between the first disc and the limiting seat. The first spring is sleeved on the outer surface of the first pull rod. A first limiting block is fixedly connected to the end of the first pull rod away from the first disc.

[0008] As a further description of the present utility model, a turntable is fixedly sleeved on the front outer surface of the rotating shaft. A U-shaped rod is movably inserted into the outer surface of the turntable. Four limiting holes are arranged in a circumferential array on the front outer surface of the adjusting frame. The two ends of the U-shaped rod are movably connected to the inside of the limiting holes. Two second springs are fixedly connected between the U-shaped rod and the turntable. The two second springs are respectively sleeved on the two rod-shaped ends of the two U-shaped rods.

[0009] As a further description of the present utility model, a second pull rod is movably inserted into the top outer surface of the storage seat. A second disc is fixedly connected to the top outer surface of the second pull rod. A third spring is fixedly connected between the second disc and the storage seat. A second limiting block is fixedly connected to the bottom outer surface of the second pull rod.

[0010] As a further description of the present utility model, movable rods are movably inserted into the left and right outer surfaces of the locking frame. Fourth springs are fixedly connected to the left and right inner walls of the locking frame. The fourth springs are sleeved on the outer surfaces of the movable rods. The other ends of the fourth springs are fixedly connected to the baffle. The other ends of the movable rods are fixedly connected to the baffle.

[0011] As a further description of the present utility model, a handle is fixedly connected to the right outer surface of the adjusting frame.

[0012] As a further description of the present utility model, a sliding rod is fixedly connected to the inside of the insertion cylinder. The two sliders are both movably sleeved on the outer surface of the sliding rod.

[0013] As a further description of the present utility model, when the nylon rope is tightened in the storage seat, the limiting groove of the connection block corresponds to the second limiting block.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. In a new structure of the manhole installation cover of a rudder blade provided by the utility model, by rotating the turntable to drive the connecting rod, the connecting rod drives the slider to retract the L-shaped plate into the insertion cylinder, releasing the limit on the adjustment frame and the locking frame, so as to release the limit between the rudder blade body and the installation cover plate. Therefore, when closing and opening the installation cover plate, it is not necessary to remove too many bolts, and the installation cover plate can be quickly opened, saving time and effort.

[0016] 2. In a new structure of the manhole installation cover of a rudder blade provided by the utility model, the installation cover plate is hung on the surface of the rudder blade through the upper hinge and the lower hinge, which will not damage the paint and steel plate base material on the surface of the rudder blade, and has high safety.

[0017] 3. In a new structure of the manhole installation cover of a rudder blade provided by the utility model, by setting the nylon rope and the connecting block, when the installation cover plate is opened, the connecting block is inserted into the internal part of the limit seat, and the connecting block is limited by the first pull rod in cooperation with the first limit block and the first spring to prevent the installation cover plate from being closed by external force during maintenance. When the installation cover plate is closed, the nylon rope is retracted into the storage seat for storage, and the connecting block is limited by the second pull rod and the third spring in cooperation with the second limit block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view structural schematic diagram of the utility model;

[0019] Figure 2 is the rear view structural schematic diagram of the utility model;

[0020] Figure 3 is the structural schematic diagram when the installation cover plate of the utility model is opened;

[0021] Figure 4 is the utility model Figure 1 the enlarged structural schematic diagram at A in;

[0022] Figure 5 is the top view sectional structural schematic diagram of the connection part of the locking frame and the adjustment frame of the utility model;

[0023] Figure 6 is the utility model Figure 5 the enlarged structural schematic diagram at B in;

[0024] Figure 7 is the utility model Figure 5 the enlarged structural schematic diagram at C in;

[0025] Figure 8 is the structural schematic diagram of the storage seat of the utility model;

[0026] Figure 9 is the structural schematic diagram of the limit seat of the utility model.

[0027] In the figure: 1, rudder blade body; 2, manhole; 3, mounting cover plate; 4, upper hinge; 5, bolt; 6, locking frame; 7, L-shaped frame; 8, adjusting frame; 9, rotating shaft; 10, adjusting disc; 11, connecting rod; 12, slider; 13, L-shaped plate; 14, baffle; 15, storage seat; 16, nylon rope; 17, connecting block; 18, limiting seat; 19, first pull rod; 20, first limiting block; 21, first spring; 22, turntable; 23, second spring; 24, limiting hole; 25, second pull rod; 26, third spring; 27, lower hinge; 28, movable rod; 29, fourth spring. Detailed implementation mode

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1:

[0030] Please refer to Figures 1 - 9 , the present invention provides a technical solution: a new type of rudder blade manhole installation cover structure, including a rudder blade body 1, a manhole 2 is opened on the outer surface of the rudder blade body 1, a mounting cover plate 3 is arranged outside the manhole 2, two upper hinges 4 are fixedly installed on the outer surface of the mounting cover plate 3, two lower hinges 27 are fixedly installed on the outer surface of the rudder blade body 1, through holes are opened between the upper hinge 4 and the lower hinge 27, a bolt 5 is arranged inside the through hole, and a nut is threadedly connected to the outer surface of the bolt 5. Specifically, the upper hinge 4 and the lower hinge 27 are connected by the bolt 5 and the nut. When the mounting cover plate 3 is opened, relative rotation occurs between the upper hinge 4 and the lower hinge 27.

[0031] The rudder blade body 1 is fixedly connected with a locking frame 6 on the right side of the mounting cover plate 3. An L-shaped frame 7 is fixedly connected to the outer surface of the front side of the mounting cover plate 3 near the locking frame 6. The other end of the L-shaped frame 7 is fixedly connected with an adjusting frame 8. A rotating shaft 9 rotatably penetrates through the outer surface of the adjusting frame 8. The rear end of the rotating shaft 9 is fixedly connected with an adjusting disk 10. A socket cylinder is fixedly connected to the outer surface of the rear side of the adjusting frame 8. The socket cylinder is located outside the adjusting disk 10. Two symmetrically arranged connecting rods 11 are rotatably connected to the outer surface of the adjusting disk 10. The ends of the two connecting rods 11 far from the adjusting disk 10 are both rotatably connected with sliders 12. L-shaped plates 13 are fixedly connected to the outer surfaces of the tops of the two sliders 12. Through grooves are formed in the left and right outer surfaces of the socket cylinder. The L-shaped plates 13 are movably connected to the inside of the through grooves. Baffles 14 are arranged at the front ends of the left and right sides of the socket cylinder and on the L-shaped plates 13. Specifically, when the mounting cover plate 3 needs to be opened, first pull the U-shaped rod outwards. The outward movement of the U-shaped rod deforms the second spring 23. The U-shaped rod disengages from the limiting hole 24. The rotating disk 22 is driven to rotate through the U-shaped rod, so that the rotating shaft 9 rotates. When the rotating shaft 9 rotates, it drives the adjusting disk 10 to rotate. When the adjusting disk 10 rotates, it pulls the connecting rod 11. The connecting rod 11 rotates between the adjusting disk 10 and the slider 12. The adjusting disk 10 is rotated 90 degrees. When the adjusting disk 10 is rotated 90 degrees, it drives the connecting rod 11, so that the connecting rod 11 pulls the slider 12. The slider 12 drives the L-shaped plate 13 to be received into the inside of the socket cylinder. Thus, the baffle 14 cannot block the L-shaped plate 13. One end of the mounting cover plate 3 is pulled outwards through the handle, so that the upper hinge 4 rotates with the lower hinge 27, and the mounting cover plate 3 is opened. Thus, the mounting cover plate 3 can be quickly opened. When the mounting cover plate 3 is closed, the mounting cover plate 3 is closed, so that the socket cylinder is inserted into the locking frame 6. The rotating disk 22 is rotated in the reverse direction, so that the adjusting disk 10 is rotated 90 degrees in the reverse direction. Thus, the L-shaped plate 13 extends out of the inside of the socket cylinder. The baffle 14 limits the L-shaped plate 13 to prevent it from opening automatically.

[0032] In this embodiment, a rotating disk 22 is fixedly sleeved on the outer surface of the front side of the rotating shaft 9. A U-shaped rod is movably inserted into the outer surface of the rotating disk 22. Four limiting holes 24 are arranged in a circumferential array on the outer surface of the front side of the adjusting frame 8. The two ends of the U-shaped rod are movably connected to the inside of the limiting holes 24. Two second springs 23 are fixedly connected between the U-shaped rod and the rotating disk 22. The two second springs 23 are respectively sleeved on the two rod-shaped ends of the two U-shaped rods. Specifically, by pulling the U-shaped rod, the U-shaped rod disengages from the limiting hole 24, so that the second spring 23 is compressed, and the limit on the rotating disk 22 is released. When the U-shaped rod is inserted into the limiting hole 24, the rotating disk 22 is limited.

[0033] In this embodiment, movable rods 28 are movably inserted into the outer surfaces on both the left and right sides of the locking frame 6. On the inner walls on both the left and right sides of the locking frame 6, fourth springs 29 are fixedly connected. The fourth springs 29 are sleeved on the outer surfaces of the movable rods 28, and the other ends of the fourth springs 29 are fixedly connected to the baffle plates 14. The other ends of the movable rods 28 are fixedly connected to the baffle plates 14. Specifically, when components such as the connecting rod 11 are damaged and the L-shaped plate 13 cannot be retracted by rotating the rotating shaft 9 to release the limit on the adjusting frame 8 and the locking frame 6, the movable rods 28 are pulled outwards to compress the fourth springs 29, and the baffle plates 14 are pulled towards both sides to release the limit on the L-shaped plate 13.

[0034] In this embodiment, a handle is fixedly connected to the outer surface on the right side of the adjusting frame 8. Specifically, the handle facilitates applying force to the adjusting frame 8, thereby applying force to the mounting cover plate 3 to open or close the mounting cover plate 3.

[0035] In this embodiment, a sliding rod is fixedly connected to the inside of the insertion cylinder. Both sliders 12 are movably sleeved on the outer surface of the sliding rod. Specifically, when the connecting rod 11 drives the slider 12 to move, the slider 12 slides on the outer surface of the sliding rod, thereby ensuring that the slider 12 can perform stable horizontal linear motion.

[0036] In the specific implementation process, the mounting cover plate 3 is installed at the manhole 2 of the rudder blade body 1. When the mounting cover plate 3 needs to be opened, first pull the U-shaped rod outwards. Pulling the U-shaped rod outwards deforms the second spring 23, and the U-shaped rod disengages from the limiting hole 24. The U-shaped rod drives the turntable 22 to rotate, causing the rotating shaft 9 to rotate. When the rotating shaft 9 rotates, it drives the adjusting disc 10 to rotate. When the adjusting disc 10 rotates, it pulls the connecting rod 11. The connecting rod 11 rotates between the adjusting disc 10 and the slider 12, and the adjusting disc 10 is rotated 90 degrees. When the adjusting disc 10 is rotated 90 degrees, it drives the connecting rod 11, causing the connecting rod 11 to pull the slider 12. The slider 12 drives the L-shaped plate 13 to retract into the insertion cylinder, so that the baffle plate 14 cannot block the L-shaped plate 13. One end of the mounting cover plate 3 is pulled outwards through the handle, causing the upper hinge 4 and the lower hinge 27 to rotate, and the mounting cover plate 3 is opened, so that the mounting cover plate 3 can be quickly opened. When closing the mounting cover plate 3, close the mounting cover plate 3 so that the insertion cylinder is inserted into the locking frame 6, and rotate the turntable 22 in the reverse direction, causing the adjusting disc 10 to rotate 90 degrees in the reverse direction. Thus, the L-shaped plate 13 extends out of the insertion cylinder, and the baffle plate 14 limits the L-shaped plate 13 to prevent it from opening automatically.

[0037] Embodiment 2:

[0038] Please refer to Figures 1 - 9, the present utility model provides a technical solution: a storage seat 15 is fixedly connected to the front outer surface of the installation cover plate 3, a nylon rope 16 is fixedly connected to the inside of the storage seat 15, the other end of the nylon rope 16 is fixedly connected to a connection block 17, a limiting seat 18 is fixedly connected to the front outer surface of the rudder blade on the left side of the installation cover plate 3, a first pull rod 19 is movably inserted into the left outer surface of the limiting seat 18, a first disc is fixedly connected to the left outer surface of the first pull rod 19, a first spring 21 is fixedly connected between the first disc and the limiting seat 18, the first spring 21 is sleeved on the outer surface of the first pull rod 19, and a first limiting block 20 is fixedly connected to the end of the first pull rod 19 away from the first disc. Specifically, take out the nylon rope 16 from the storage seat 15, then pull up the first pull rod 19 to compress the first spring 21, insert the end of the connection seat limiting groove facing the first limiting block 20 into the inside of the limiting seat 18. When the limiting groove corresponds to the first limiting block 20, stop applying force to the first pull rod 19, so that the first limiting block 20 is inserted into the limiting groove, thereby limiting the connection block 17, and then pulling the installation cover plate 3 through the nylon rope 16 to prevent the installation cover plate 3 from closing due to external force during maintenance.

[0039] In this embodiment, a second pull rod 25 is movably inserted into the top outer surface of the storage seat 15, a second disc is fixedly connected to the top outer surface of the second pull rod 25, a third spring 26 is fixedly connected between the second disc and the storage seat 15, and a second limiting block is fixedly connected to the bottom outer surface of the second pull rod 25. Specifically, when it is necessary to release the limit on the connection seat, lift the second pull rod 25 upward to compress the third spring 26, and the second limiting block releases the limit on the connection block 17.

[0040] In this embodiment, when the nylon rope 16 is tightened in the storage seat 15, the limiting groove of the connection block 17 corresponds to the second limiting block. Specifically, adopting the above technical solution can prevent part of the nylon rope 16 from being exposed outside the storage seat 15 when the nylon rope 16 is stored in the storage seat 15.

[0041] In the specific implementation process, after opening the installation cover plate 3, lift the second pull rod 25 upward, so that the third spring 26 is compressed, and the second limit block releases the limit on the connecting block 17. Take out the nylon rope 16 from the storage seat 15, and then pull the first pull rod 19 upward, so that the first spring 21 is compressed. Insert the end of the connecting seat limit groove facing the first limit block 20 into the inside of the limit seat 18. When the limit groove corresponds to the first limit block 20, stop applying force to the first pull rod 19, so that the first limit block 20 is inserted into the limit groove, thereby limiting the connecting block 17, and thus pulling the installation cover plate 3 through the nylon rope 16 to prevent the installation cover plate 3 from closing under external force during maintenance. When the installation cover plate 3 is closed, the nylon rope 16 is retracted into the storage seat 15 for storage, and the second pull rod 25 and the third spring 26 cooperate with the second limit block to limit the connecting block 17.

[0042] Working principle: In the actual use process of the present utility model, the installation cover plate 3 is installed at the manhole 2 of the rudder blade body 1. When it is necessary to open the installation cover plate 3, first pull the U-shaped rod outward. The outward movement of the U-shaped rod deforms the second spring 23, and the U-shaped rod disengages from the limit hole 24. Drive the turntable 22 to rotate through the U-shaped rod, so that the rotating shaft 9 rotates. When the rotating shaft 9 rotates, it drives the adjusting disc 10 to rotate. When the adjusting disc 10 rotates, it pulls the connecting rod 11. The connecting rod 11 rotates between the adjusting disc 10 and the slider 12, and rotates the adjusting disc 10 by 90 degrees. When the adjusting disc 10 rotates by 90 degrees, it drives the connecting rod 11, so that the connecting rod 11 pulls the slider 12, and the slider 12 drives the L-shaped plate 13 to be retracted into the inside of the insertion cylinder, so that the baffle 14 cannot block the L-shaped plate 13. Pull one end of the installation cover plate 3 outward through the handle, so that the upper hinge 4 rotates with the lower hinge 27, and open the installation cover plate 3, so that the installation cover plate 3 can be quickly opened. When closing the installation cover plate 3, close the installation cover plate 3, so that the insertion cylinder is inserted into the locking frame 6, and rotate the turntable 22 in the reverse direction, so that the adjusting disc 10 rotates 90 degrees in the reverse direction, so that the L-shaped plate 13 extends out of the inside of the insertion cylinder, and the baffle 14 limits the L-shaped plate 13 to prevent it from opening automatically.

[0043] After opening the installation cover plate 3, lift the second pull rod 25 upward to compress the third spring 26, release the limit on the connecting block 17 by the second limit block, take out the nylon rope 16 from the storage seat 15, and then pull the first pull rod 19 upward to compress the first spring 21. Insert the end of the connecting seat limit groove facing the first limit block 20 into the inside of the limit seat 18. When the limit groove corresponds to the first limit block 20, stop applying force to the first pull rod 19, so that the first limit block 20 is inserted into the limit groove, thereby limiting the connecting block 17, and then pulling the installation cover plate 3 through the nylon rope 16 to prevent the installation cover plate 3 from closing under external force during maintenance. When the installation cover plate 3 is closed, the nylon rope 16 is retracted into the storage seat 15 for storage, and the connecting block 17 is limited by the second pull rod 25 and the third spring 26 in cooperation with the second limit block.

[0044] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel rudder blade manhole installation cover structure, comprising a rudder blade body (1), characterized in that: The outer surface of the rudder blade body (1) is provided with a manhole (2), the outer side of the manhole (2) is provided with a mounting cover plate (3), the outer surface of the mounting cover plate (3) is fixedly provided with two upper hinges (4), the outer surface of the rudder blade body (1) is fixedly provided with two lower hinges (27), a through hole is provided between the upper hinge (4) and the lower hinge (27), a bolt (5) is provided inside the through hole, and a nut is threadedly connected to the outer surface of the bolt (5); The rudder blade body (1) is located on the right side of the mounting cover plate (3) and is fixedly connected to a locking frame (6); the front outer surface of the mounting cover plate (3) is fixedly connected to an L-shaped frame (7) near the locking frame (6); the other end of the L-shaped frame (7) is fixedly connected to an adjustment frame (8); a rotating shaft (9) is rotatably passed through the outer surface of the adjustment frame (8); the rear end of the rotating shaft (9) is fixedly connected to an adjustment disk (10); the rear outer surface of the adjustment frame (8) is fixedly connected to an insertion sleeve, and the insertion sleeve is located on the adjustment disk (10). The outer surface of the adjustment disk (10) is rotatably connected to two connecting rods (11) that are symmetrically arranged on the left and right sides. The ends of the two connecting rods (11) that are away from the adjustment disk (10) are rotatably connected to sliders (12). The top outer surfaces of the two sliders (12) are fixedly connected to L-shaped plates (13). The outer surfaces of the left and right sides of the insert are provided with through grooves. The L-shaped plates (13) are movably connected to the inside of the through grooves. Baffles (14) are provided on the left and right sides of the insert at the front ends of the L-shaped plates (13).

2. A novel rudder blade manhole installation cover structure according to claim 1, characterized in that: The front outer surface of the mounting cover (3) is fixedly connected to a storage seat (15), the interior of the storage seat (15) is fixedly connected to a nylon rope (16), the other end of the nylon rope (16) is fixedly connected to a connecting block (17), the front outer surface of the rudder blade is located on the left side of the mounting cover (3) and is fixedly connected to a limiting seat (18), the left outer surface of the limiting seat (18) is movably provided with a first pull rod (19), the left outer surface of the first pull rod (19) is fixedly connected to a first disc, a first spring (21) is fixedly connected between the first disc and the limiting seat (18), the first spring (21) is sleeved on the outer surface of the first pull rod (19), and the end of the first pull rod (19) away from the first disc is fixedly connected to a first limiting block (20).

3. A novel rudder blade manhole installation cover structure according to claim 1, characterized in that: A rotating disk (22) is fixedly sleeved on the front outer surface of the rotating shaft (9), a U-shaped rod is movably inserted on the outer surface of the rotating disk (22), four limiting holes (24) are arranged in a circular array on the front outer surface of the adjusting frame (8), two ends of the U-shaped rod are movably connected to the inside of the limiting holes (24), two second springs (23) are fixedly connected between the U-shaped rod and the rotating disk (22), and the two second springs (23) are respectively sleeved on two rod-shaped ends of the two U-shaped rods.

4. A novel rudder blade manhole installation cover structure according to claim 2, characterized in that: A second pull rod (25) is movably inserted into the top outer surface of the storage seat (15); a second disc is fixedly connected to the top outer surface of the second pull rod (25); a third spring (26) is fixedly connected between the second disc and the storage seat (15); and a second limit block is fixedly connected to the bottom outer surface of the second pull rod (25).

5. The novel rudder blade manhole installation cover structure according to claim 1 is characterized in that: A movable rod (28) is movably inserted into the outer surfaces of the left and right sides of the locking frame (6); a fourth spring (29) is fixedly connected to the inner walls of the left and right sides of the locking frame (6); the fourth spring (29) is sleeved on the outer surface of the movable rod (28); the other end of the fourth spring (29) is fixedly connected to the baffle (14); and the other end of the movable rod (28) is fixedly connected to the baffle (14).

6. The novel rudder blade manhole installation cover structure according to claim 1 is characterized in that: A handle is fixedly connected to the right outer surface of the adjustment frame (8).

7. The novel rudder blade manhole installation cover structure according to claim 1 is characterized by: A sliding rod is fixedly connected to the interior of the inserting tube, and the two sliding blocks (12) are movably sleeved on the outer surface of the sliding rod.

8. The novel rudder blade manhole installation cover structure according to claim 2 is characterized by: When the nylon rope (16) is tightened in the storage seat (15), the limiting groove of the connecting block (17) corresponds to the second limiting block.

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