Control tower anti-falling device and ship surface spraying device

Abstract

The invention provides a tower anti-falling device and a ship surface spraying device.The tower anti-falling device comprises a lifting traction device, a tower frame, a tower, an anti-falling lever arm, an anti-falling fixing base and a limiting base, the anti-falling fixing base and the limiting base are fixed to the tower, and the anti-falling lever arm is rotatably installed on the anti-falling fixing base through a first pin shaft; the anti-falling lever arm is provided with a first arm part distributed on the upper side of the first pin shaft and a second arm part distributed on the lower side of the first pin shaft, and the lifting traction device is in transmission connection with the first arm part; when the lifting traction device is kept connected with the first arm part, the second arm part of the anti-falling lever arm is driven to be separated from the tower frame and abut against the limiting seat by pulling force, acting on the first arm part, of the lifting traction device. When the lifting traction device is disconnected with the first arm part, the bearing of the anti-falling lever arm drives the second arm part of the anti-falling lever arm to rotate towards the tower, the second arm part can be connected with the tower in a clamped mode, continuous falling of the control tower is prevented, the anti-falling effect of the control tower is achieved, and safety is improved.

Description

Technical Field

[0001] This invention relates to the field of ship exterior coating technology, and in particular to a tower fall protection device and a ship exterior coating device equipped with the tower fall protection device. Background Technology

[0002] In shipbuilding and repair operations, a ship exterior painting process is involved to form a paint film on the ship's surface, serving functions such as corrosion protection, stain prevention, aesthetics, and labeling. There are two main methods of ship exterior painting: manual painting and automatic painting. Manual painting involves workers holding spray guns and performing the painting operation from an aerial work platform; this method has drawbacks such as low painting efficiency, high risk of working at heights, and uneven paint film thickness. Automatic painting refers to the use of automated ship exterior painting equipment to perform the painting operation automatically. It improves the uniformity of paint film thickness and painting efficiency, and has been widely used.

[0003] Ship exterior painting equipment requires a lifting device to drive the painting equipment up and down, completing the painting operations on different height parts of the ship's exterior. Existing ship exterior painting equipment, such as the automated operation platform for ship painting disclosed in Chinese invention patent application number 202110573747.6, includes a lifting device comprising a lower main boom, an upper boom movably connected to the top of the lower main boom, and a main boom winch. A painting arm is mounted on one side of the upper boom, and a painting head is fixedly connected to the end of the painting arm away from the upper boom. The main boom winch is movably connected to the painting arm via a winch rope, and the lifting and extension of the upper boom and painting arm are centrally controlled by the main boom winch, thereby controlling the lifting and extension of the painting head. However, this ship exterior painting equipment has the following drawbacks: it features a liftable upper boom, which is bulky and requires a high-powered winch for overall lifting; furthermore, in the event of an accidental fall of the upper boom, there is no fall arrest mechanism to prevent it from collapsing, resulting in a low safety factor. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a tower fall prevention device that can effectively prevent tower falls.

[0005] To achieve the above objectives, the present invention provides a tower fall arrest device, comprising a lifting and traction device, a tower extending vertically, a tower platform movably mounted on the tower platform, a fall arrest lever arm, and a fall arrest fixing seat and a limiting seat both fixed to the tower platform. The fall arrest lever arm is rotatably mounted on the fall arrest fixing seat via a first pin. The fall arrest lever arm has a first arm portion distributed on the upper side of the first pin and a second arm portion distributed on the lower side of the first pin. The lifting and traction device is drivenly connected to the first arm portion, and the second arm portion is disposed between the tower platform and the limiting seat.

[0006] When the lifting traction device remains connected to the first arm, the pulling force of the lifting traction device acting on the first arm drives the second arm of the anti-fall lever arm to separate from the tower and abut against the limit seat.

[0007] When the connection between the lifting traction device and the first arm is disconnected, the load-bearing drive of the anti-fall lever arm causes the second arm of the anti-fall lever arm to rotate toward the tower, and the second arm can engage with the tower.

[0008] Furthermore, the tower fall arrestor also includes a fall arrestor limiting plate fixed to the fall arrestor mounting base. The fall arrestor limiting plate is distributed on the side of the first arm facing away from the tower. When the second arm is engaged with the tower, the first arm abuts against the fall arrestor limiting plate.

[0009] Furthermore, the tower anti-fall device also includes a pop-out drive mechanism, which acts on the second arm to drive the second arm to rotate toward the tower when the connection between the lifting traction device and the first arm is disconnected.

[0010] Furthermore, the pop-out drive mechanism includes a second pin fixed to the fall arrest lever arm, a third pin fixed to the fall arrest fixing seat, an auxiliary push rod movably passing through the third pin, a spring sleeved on the auxiliary push rod, and a push plate fixed to the end of the auxiliary push rod. The second pin is located below the first pin, and the third pin is located on the side of the fall arrest lever arm facing away from the tower. The two ends of the spring abut against the third pin and the push plate, respectively, and the push plate abuts against the second pin.

[0011] Furthermore, the tower fall arrestor also includes a pulley mounting arm, and the lifting traction device includes a winch, a lifting rope wound on the winch, and a pulley assembly with a movable pulley. The lifting rope is fixed to the tower after passing over each pulley in the pulley assembly. The movable pulley is installed at the upper end of the pulley mounting arm, and the lower end of the pulley mounting arm is rotatably connected to the upper end of the first arm through a fourth pin.

[0012] When the lifting rope is intact, the lifting traction device remains connected to the first arm.

[0013] When the lifting rope breaks, the connection between the lifting traction device and the first arm is disconnected.

[0014] Furthermore, the pulley assembly also includes a first fixed pulley, a second fixed pulley, and a third fixed pulley. The lifting rope passes sequentially around the first fixed pulley, the second fixed pulley, the third fixed pulley, and the movable pulley before being fixed to the top of the tower. The first fixed pulley is installed on the outer periphery of the tower, and the second and third fixed pulleys are both installed on the top of the tower. The first and second fixed pulleys are aligned in the vertical direction, the second and third fixed pulleys are aligned in the horizontal direction, and the side end faces of the third fixed pulley and the movable pulley are aligned in the vertical direction.

[0015] Furthermore, a rope fixing buckle is fixed to the top of the tower, the end of the lifting rope is fixedly connected to the rope fixing buckle, and the side end face of the movable pulley and the rope fixing buckle are aligned in the vertical direction.

[0016] Furthermore, the lifting rope passes through the inner end of the first fixed pulley near the tower, the upper end of the second fixed pulley, and the upper end of the third fixed pulley. Limiting rods are installed on the upper side of the second fixed pulley, the upper side of the third fixed pulley, and both sides of the movable pulley in the horizontal direction.

[0017] Furthermore, the lifting rope is a steel wire rope.

[0018] The present invention also provides a ship exterior spraying device, including a movable chassis assembly, a horizontally extendable telescopic arm, a spraying device installed at the outer end of the telescopic arm, and a tower anti-fall device as described above, wherein the tower is fixed to the top of the chassis assembly, and the inner end of the telescopic arm is installed on the tower.

[0019] As described above, the tower fall arrestor and ship exterior coating device of the present invention have the following beneficial effects:

[0020] This application employs a lifting and traction device to drive the tower to move up or down along the tower frame, thereby achieving the lifting and lowering of the tower. In particular, when the traction between the lifting and traction device and the first arm is accidentally disconnected, the tension of the lifting and traction device on the anti-fall lever arm disappears, releasing the anti-fall lever arm. The load on the anti-fall lever arm drives the lower end of the anti-fall lever arm to rotate towards the tower frame, so that the second arm of the anti-fall lever arm can be locked on the tower frame, thereby preventing the tower from continuing to fall, playing a role in preventing the tower from falling and improving safety. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the exterior painting device for a ship equipped with a tower fall arrestor, as described in this application.

[0022] Figure 2 for Figure 1 Rear view.

[0023] Figure 3 for Figure 1 The right view.

[0024] Figure 4 This is a schematic diagram of the connection between the tower and the tower frame in this application. Only one section of the tower frame is shown in the diagram.

[0025] Figure 5 for Figure 4 A schematic diagram of the installation structure of the moving pulley.

[0026] Figure 6 for Figure 5 A half-section view.

[0027] Figure 7 for Figure 6 A diagram illustrating the situation when the lifting rope breaks.

[0028] Component designation explanation

[0029] 10 winches

[0030] 20 lifting ropes

[0031] 31 Movable pulley

[0032] 32 First fixed pulley

[0033] 33 Second fixed pulley

[0034] 34 Third fixed pulley

[0035] 35 Rope fixing buckle

[0036] 40 towers

[0037] 41 Main Columns

[0038] 42 struts

[0039] 50 Tower

[0040] 61 Pulley mounting arm

[0041] 62 Anti-fall lever arm

[0042] 621 First Arm

[0043] 622 Second Arm

[0044] 63 Fall arrestor mounting bracket

[0045] 64 Limiting seat

[0046] 65 Fourth pin

[0047] 66 First Pin

[0048] 67 Second Pin

[0049] 68 Third pin

[0050] 69 Auxiliary push rod

[0051] 610 Anti-fall Spring

[0052] 611 push plate

[0053] 612 Fall arrestor limit plate

[0054] 70 Chassis Assembly

[0055] 80 telescopic boom

[0056] 90 Spraying Equipment Detailed Implementation

[0057] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0058] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and objectives of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0059] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intervening component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intervening component.

[0060] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0061] This invention provides a control tower fall protection device and a ship exterior painting device equipped with the control tower fall protection device. The ship exterior painting device is used for automatic painting of the ship's exterior. During the painting process, the ship exterior painting device moves along a predetermined route parallel to the curve of the ship's exterior, thus achieving the movement of the ship exterior painting device along the predetermined route. For ease of description, in the following embodiments, the direction of movement of the ship exterior painting device is defined as the left-right direction, and the horizontal direction perpendicular to the direction of movement of the ship exterior painting device is defined as the front-back direction. The front-back direction is also the parallel direction between the ship exterior painting device and the ship's exterior. Based on this, Figure 3 In the view shown, the left and right sides of the paper are the rear and front directions, respectively; the top and bottom sides of the paper are the top and bottom directions, respectively; and the front and back sides of the paper are the right and left directions, respectively.

[0062] like Figures 1 to 4 As shown, the ship exterior painting device of the present invention includes a traveling chassis assembly 70, a lifting and traction device, a vertically extending tower 40, a tower 50 movably mounted on the right side of the tower 40, a telescopic arm 80 horizontally extendable in the front-rear direction, and a painting device 90 mounted on the front end of the telescopic arm 80. The lower end of the tower 40 is fixed to the top of the traveling chassis assembly 70. The lifting and traction device is connected to the tower 50 and drives the tower 50 to rise or fall. The rear end of the telescopic arm 80 is mounted on the tower 50. During the ship exterior painting operation, the traveling chassis assembly 70 moves along a path parallel to the ship's exterior curve, thereby driving the entire ship exterior painting device to move along the same path. The lifting and traction device drives the tower 50 to rise and fall along the tower 40, and the telescopic boom 80 and the painting equipment 90 rise and fall synchronously with the tower 50. The telescopic boom 80 extends forward, driving the painting equipment 90 forward to the target area. Combined with the movement of the traveling chassis and the rising and falling of the tower 50, the ship's exterior is automatically painted. In this application, the tower 40 is set as a non-liftable structure, and the lifting and traction device only drives the tower 50 to rise and fall along the tower 40, effectively reducing the load on the power source in the lifting and traction device.

[0063] like Figure 4 As shown, the cross-section of the tower 40 is roughly frame-shaped. The tower 40 has four main columns 41 that extend vertically. The main columns 41 are square steel pipes. Several struts 42 are fixed between two adjacent main columns 41. The struts 42 can be horizontally installed straight struts or inclined struts.

[0064] like Figures 4 to 6As shown, the tower fall arrestor of this application includes the aforementioned lifting and traction device, tower 40, and tower 50, as well as a fall arrest lever arm 62, a fall arrest fixing seat 63, and a limiting seat 64. The fall arrest fixing seat 63 and the limiting seat 64 are both welded and fixed to the tower 50. The fall arrest lever arm 62 is rotatably mounted on the fall arrest fixing seat 63 via a first pin 66 extending forward and backward. The first pin 66 constitutes the rotation fulcrum of the fall arrest lever arm 62. The fall arrest lever arm 62 is a bent rod. The fall arrest lever arm 62 has a first arm portion 621 distributed on the upper side of the first pin 66 and a second arm portion 622 distributed on the lower side of the first pin 66. The lifting and traction device is connected to the first arm portion 621 in a transmission connection. The second arm portion 622 is disposed between the tower 40 and the limiting seat 64, that is, the tower 40, the second arm portion 622, and the limiting seat 64 are distributed sequentially from left to right.

[0065] When the lifting traction device remains connected to the first arm 621, the lifting traction device always pulls the first arm 621, and the lifting traction device applies an upward pulling force to the anti-fall lever arm 62; Figure 6 Taking the view angle shown as an example, under the aforementioned pulling force, the anti-fall lever arm 62 rotates clockwise around the first pin 66, which in turn drives the second arm 622 of the anti-fall lever arm 62 to rotate toward the limiting seat 64. At this time, the second arm 622 of the anti-fall lever arm 62 separates from the tower 40 and abuts against the limiting seat 64. Therefore, under the combined action of the pulling force of the lifting traction device and the limiting seat 64, the anti-fall lever arm 62 reliably maintains abutment against the limiting seat 64, and in this state, the lower pulley mounting arm 61 is in a vertical position.

[0066] When the connection between the lifting traction device and the first boom 621 is accidentally disconnected, the tower 50 begins to fall. Simultaneously, the tension exerted by the lifting traction device on the anti-fall lever arm 62 disappears, and the anti-fall lever arm 62 is released. Figure 6 Taking the view angle shown as an example, under the load-bearing action of the anti-fall lever arm 62, the anti-fall lever arm 62 rotates counterclockwise around the first pin 66, which drives the second arm 622 of the anti-fall lever arm 62 to rotate towards the tower 40. Then, the end of the anti-fall lever arm 62 pops out and engages with the support rod 42 of the tower 40. Figure 7 As shown, this limits the further descent of tower 50 and improves safety.

[0067] Furthermore, such as Figures 1 to 3 As shown, the lifting and traction device includes a winch 10 fixed to the top of the traveling chassis assembly 70, a lifting rope 20 wound on the winch 10, and a pulley assembly. The pulley assembly includes several pulleys arranged sequentially along the path of the lifting rope 20. The lifting rope 20 is fixed to the tower 40 after passing over each pulley in the pulley assembly. Among the multiple pulleys in the pulley assembly, one pulley is a movable pulley 31 installed on the tower 50. Figure 4 and Figure 5 As shown, the tower fall arrestor also includes a pulley mounting arm 61. A movable pulley 31 is mounted on the upper end of the pulley mounting arm 61. The lower end of the pulley mounting arm 61 is rotatably connected to the upper end of the fall arrest lever arm 62 via a fourth pin 65 extending forward and backward. The fourth pin 65 forms the fulcrum for the relative rotation of the pulley mounting arm 61 and the fall arrest lever arm 62. The fourth pin 65 and the first pin 66 are staggered, and the fourth pin 65 is further away from the tower 40 than the first pin 66, that is, the fourth pin 65 is located to the upper right of the first pin 66.

[0068] When the lifting rope 20 is intact, it always pulls the movable pulley 31, maintaining connection between the lifting traction device and the first arm 621. The lifting rope 20 applies an upward pulling force to the movable pulley 31, which drives the second arm 622 of the fall arrest lever arm 62 to rotate toward the limiting seat 64, ensuring the fall arrest lever arm 62 reliably abuts against the limiting seat 64. In this state, the pulley mounting arm 61 is vertical. When the lifting rope 20 breaks unexpectedly, the connection between the lifting traction device and the first arm 621 is severed, the pulling force applied by the lifting rope 20 to the movable pulley 31 disappears, the fall arrest lever arm 62 is released, and under the weight of the movable pulley 31, the fall arrest lever arm 62 rotates counterclockwise around the first pin 66. The end of the fall arrest lever arm 62 pops out and engages with the tower 40. Figure 7 As shown, this limits the further descent of tower 50.

[0069] Furthermore, such as Figure 5 As shown, the tower fall arrestor also includes a fall arrestor limiting plate 612 fixed to the top of the fall arrestor mounting base 63. The fall arrestor limiting plate 612 is distributed on the side of the first arm 621 facing away from the tower 40, that is, on the right side of the first arm 621, and the fall arrestor limiting plate 612 is inclined. When the lifting rope 20 is not broken, if... Figure 6 As shown, the first arm 621 is separated from the fall arrestor plate 612, and the two do not contact each other. In the event of an accidental breakage of the lifting rope 20, as... Figure 7 As shown, the second arm 622 of the fall arrest lever arm 62 pops out and engages with one of the support rods 42 of the tower 40. At the same time, the first arm 621 of the fall arrest lever arm 62 abuts against the fall arrest limiting plate 612, restricting the second arm 622 of the fall arrest lever arm 62 from further rotating and disengaging from the support rod 42, thereby improving the reliability of the fall arrest.

[0070] Furthermore, such as Figure 5 and Figure 6As shown, the tower fall arrestor also includes a pop-out drive mechanism. The pop-out drive mechanism acts on the second arm 622 to drive the second arm 622 toward the tower 40 when the connection between the lifting traction device and the first arm 621 is disconnected. The pop-out drive mechanism includes a second pin 67 fixed to the fall arrest lever arm 62, a third pin 68 fixed to the fall arrest fixing seat 63, an auxiliary push rod 69 movably passing through the third pin 68, a fall arrest spring 610 sleeved on the auxiliary push rod 69, and a push plate 611 fixed to the end of the auxiliary push rod 69. The second pin 67 and the third pin 68 both extend forward and backward. The second pin 67 is located below the first pin 66, and the third pin 68 is located on the right side of the fall arrest lever arm 62. The right and left ends of the fall arrest spring 610 abut against the third pin 68 and the push plate 611, respectively. The push plate 611 abuts against the second pin 67. When the lifting rope 20 is intact, the anti-fall lever arm 62 tends to rotate clockwise, keeping the anti-fall spring 610 in a compressed state. When the lifting rope 20 breaks, the anti-fall lever arm 62 rotates counterclockwise, releasing the anti-fall spring 610 and further driving the anti-fall lever arm 62 to rotate counterclockwise, more reliably pushing the lower end of the anti-fall lever arm 62 to the left, causing it to lock onto the support rod 42 of the tower 40.

[0071] Furthermore, such as Figures 1 to 3 As shown, the pulley assembly also includes a first fixed pulley 32, a second fixed pulley 33 and a third fixed pulley 34. A rope fixing buckle 35 is fixed to the top of the tower 40. The first fixed pulley 32, the second fixed pulley 33, the third fixed pulley 34, the movable pulley 31 and the rope fixing buckle 35 are arranged sequentially along the path of the lifting rope 20. The first fixed pulley 32 is fixed to the left side of the tower 40, and the second fixed pulley 33 is installed on the left side of the top of the tower 40. The first fixed pulley 32 and the second fixed pulley 33 are aligned in the vertical direction. The third fixed pulley 34 is installed on the right side of the top of the tower 40. The second fixed pulley 33 and the third fixed pulley 34 are aligned in the horizontal direction. The movable pulley 31 is installed on the top of the tower 50. The rope fixing buckle 35 is installed on the right side of the top of the tower 40 and distributed in front of the second fixed pulley 33. The rear sides of the third fixed pulley 34 and the movable pulley 31 are aligned in the vertical direction. The front side of the movable pulley 31 and the rope fixing buckle 35 are aligned in the vertical direction. The lifting rope 20 led out from the winch 10 passes through the first fixed pulley 32, the second fixed pulley 33, the third fixed pulley 34 and the movable pulley 31 in sequence and is then fixed to the rope fixing buckle 35. Thus, when the winch 10 releases the lifting rope 20, the movable pulley 31 descends, thereby driving the tower 50 to move down along the tower frame 40; conversely, when the winch 10 retracts the lifting rope 20, the movable pulley 31 rises, thereby driving the tower 50 to move up along the tower frame 40.

[0072] Preferably, the lifting rope 20 is a steel wire rope. The lifting rope 20 passes through the inner side of the first fixed pulley 32 near the tower 40, the upper side of the second fixed pulley 33, and the upper side of the third fixed pulley 34. Limiting rods are installed on the upper side of the second fixed pulley 33, the upper side of the third fixed pulley 34, and the front and rear sides of the movable pulley 31 to prevent the lifting rope 20 from detaching from the pulleys. The first fixed pulley 32 is a side pulley to prevent the lifting rope 20 from swaying and to push the lifting rope 20 towards the tower 40, thus serving as a guide and tensioner.

[0073] In summary, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0074] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A tower fall arrestor, characterized in that: The system includes a lifting and traction device, a vertically extending tower (40), a tower platform (50) movably mounted on the tower (40), a fall arrest lever arm (62), and fall arrest fixing seats (63) and limiting seats (64) fixed to the tower platform (50). The fall arrest lever arm (62) is rotatably mounted on the fall arrest fixing seat (63) via a first pin (66). The fall arrest lever arm (62) has a first arm portion (621) distributed on the upper side of the first pin (66), and a distribution... In the second arm (622) below the first pin (66), the lifting traction device is connected to the first arm (621) in a transmission. The second arm (622) is located between the tower (40) and the limiting seat (64). When the lifting traction device is connected to the first arm (621), the pulling force of the lifting traction device on the first arm (621) drives the second arm (622) of the anti-fall lever arm (62) to separate from the tower (40) and abut against the limiting seat (64). When the connection between the lifting traction device and the first arm (621) is disconnected, the load-bearing drive of the anti-fall lever arm (62) causes the second arm (622) of the anti-fall lever arm (62) to rotate toward the tower (40), and the second arm (622) can engage with the tower (40).

2. The tower fall arrestor according to claim 1, characterized in that: It also includes a fall arresting plate (612) fixed to the fall arresting base (63), the fall arresting plate (612) being distributed on the side of the first arm (621) facing away from the tower (40); when the second arm (622) is engaged with the tower (40), the first arm (621) abuts against the fall arresting plate (612).

3. The tower fall arrestor according to claim 1, characterized in that: It also includes a pop-out drive mechanism that acts on the second arm (622) to drive the second arm (622) to rotate toward the tower (40) when the connection between the lifting traction device and the first arm (621) is disconnected.

4. The tower fall arrestor according to claim 3, characterized in that: The pop-out drive mechanism includes a second pin (67) fixed to the anti-fall lever arm (62), a third pin (68) fixed to the anti-fall fixing seat (63), an auxiliary push rod (69) movably passing through the third pin (68), a spring sleeved on the auxiliary push rod (69), and a push plate (611) fixed to the end of the auxiliary push rod (69). The second pin (67) is located below the first pin (66), and the third pin (68) is located on the side of the anti-fall lever arm (62) facing away from the tower (40). The two ends of the spring abut against the third pin (68) and the push plate (611) respectively, and the push plate (611) abuts against the second pin (67).

5. The tower fall arrestor according to claim 1, characterized in that: It also includes a pulley mounting arm (61). The lifting traction device includes a winch (10), a lifting rope (20) wound on the winch (10), and a pulley assembly with a movable pulley (31). The lifting rope (20) passes around each pulley in the pulley assembly and is fixed to the tower (40). The movable pulley (31) is installed at the upper end of the pulley mounting arm (61). The lower end of the pulley mounting arm (61) is rotatably connected to the upper end of the first arm (621) through a fourth pin (65). When the lifting rope (20) is not broken, the lifting traction device remains connected to the first arm (621); When the lifting rope (20) breaks, the connection between the lifting traction device and the first arm (621) is disconnected.

6. The tower fall arrestor according to claim 5, characterized in that: The pulley assembly further includes a first fixed pulley (32), a second fixed pulley (33), and a third fixed pulley (34). The lifting rope (20) passes through the first fixed pulley (32), the second fixed pulley (33), the third fixed pulley (34), and the movable pulley (31) in sequence and is then fixed to the top of the tower (40). The first fixed pulley (32) is installed on the outer periphery of the tower (40), and the second fixed pulley (33) and the third fixed pulley (34) are both installed on the top of the tower (40). The first fixed pulley (32) and the second fixed pulley (33) are aligned in the vertical direction, the second fixed pulley (33) and the third fixed pulley (34) are aligned in the horizontal direction, and the side end faces of the third fixed pulley (34) and the movable pulley (31) are aligned in the vertical direction.

7. The tower fall arrestor according to claim 6, characterized in that: The top of the tower (40) is fixed with a rope fixing buckle (35), the end of the lifting rope (20) is fixedly connected to the rope fixing buckle (35), and the side end face of the movable pulley (31) and the rope fixing buckle (35) are aligned in the vertical direction.

8. The tower fall arrestor according to claim 6, characterized in that: The lifting rope (20) passes through the inner end of the first fixed pulley (32) near the tower (40), the upper end of the second fixed pulley (33), and the upper end of the third fixed pulley (34). Limiting rods are installed on the upper side of the second fixed pulley (33), the upper side of the third fixed pulley (34), and both sides of the movable pulley (31) in the horizontal direction.

9. The tower fall arrestor according to claim 5, characterized in that: The lifting rope (20) is a steel wire rope.

10. A ship exterior painting device, characterized in that: The device includes a movable chassis assembly (70), a horizontally extendable telescopic arm (80), a spraying device (90) mounted on the outer end of the telescopic arm (80), and a tower fall arrestor as described in any one of claims 1-9, wherein the tower (40) is fixed to the top of the chassis assembly (70), and the inner end of the telescopic arm (80) is mounted on the tower (50).

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