Rust knocking device for ship

Abstract

The rust knocking device for the ship comprises a fixing support and a rust knocking assembly, and the rust knocking assembly is fixed to the lower portion of the fixing support; the rust knocking assembly comprises a rust knocking mechanism, the rust knocking mechanism comprises an air cylinder part, a movable rod and a cover body, a containing cavity with one open end is formed in the air cylinder part, the movable rod is located in the containing cavity, and the cover body is fixedly connected with the air cylinder part and covers the containing cavity; the movable rod is provided with a first air cavity and a second air cavity, the first air cavity is located on the upper portion of the second air cavity, the movable rod is further provided with an air release hole, the air release hole is communicated with the first air cavity, and the first air cavity and the second air cavity are both communicated with an external air pump; the knocking piece comprises a rust knocking head and a plurality of knocking rods, the rust knocking head is fixedly connected with the lower end of the movable rod and seals the second air cavity, the first ends of the knocking rods are located in the second air cavity, and the second ends of the knocking rods penetrate through the rust knocking head and extend out of the lower portion of the rust knocking head; the rust knocking device is better in rust removal effect.

Description

Technical Field

[0001] The invention relates to ship equipment, in particular to a rust knocking device for ships. Background Art

[0002] Large cargo vessels operate at sea for extended periods, exposed to the elements, and eroded by seawater hitting the decks, causing severe rust on the decks. Ocean-going crews, in addition to their arduous work, must also brave the scorching sun to remove rust from the decks and then spray them with rust inhibitors to mitigate damage. Currently, many crew members still rely on the most primitive method: hammering away the rust, cleaning the rust residue, and then manually spraying the rust inhibitor. To reduce the crew's workload, an automated rust-removing device has been developed that mimics the hammering action. However, deck rust is typically severe, with a deep base and shallow edges, creating a bowl-shaped pattern. Rust-removing machines struggle to reach the base of the rust, resulting in less than ideal rust removal results. Summary of the Invention

[0003] Based on this, it is necessary to provide a ship rust knocking device with a more ideal rust removal effect.

[0004] The present invention provides a rust knocking device for ships, comprising a fixing bracket and a rust knocking assembly, wherein the rust knocking assembly is fixed to the lower part of the fixing bracket;

[0005] The rust knocking assembly includes a rust knocking mechanism, which includes a cylinder, a movable rod and a cover body. The cylinder is provided with a receiving cavity with one end being open. The movable rod is located in the receiving cavity. The cover body is fixedly connected to the cylinder and covers the receiving cavity.

[0006] The movable rod is provided with a first air cavity and a second air cavity, wherein the first air cavity is located above the second air cavity, and the movable rod is further provided with an air leakage hole, wherein the air leakage hole is connected to the first air cavity, and both the first air cavity and the second air cavity are connected to an external air pump;

[0007] The knocking piece includes a rust knocking head and multiple knocking rods. The rust knocking head is fixedly connected to the lower end of the movable rod and seals the second air cavity. The first end of the knocking rod is located in the second air cavity, and the second end of the knocking rod passes through the rust knocking head and extends out from the lower part of the rust knocking head.

[0008] Preferably, the pressure of the first air cavity is greater than the pressure of the second air cavity, and a connecting air path is provided between the two cavities, and a one-way pressure valve is provided on the connecting air path for opening when the pressure of the second air cavity is greater than the pressure of the first air cavity, and the first end of the knocking rod is provided with a rod head, the diameter of the rod head is greater than the diameter of the knocking rod, and an air pressure groove is provided on the upper part of the rod head.

[0009] Preferably, a sealing oil groove is further provided on the cylinder member, the oil inlet of the sealing oil groove is located at the upper part of the cylinder member, and the oil outlet of the sealing oil groove is located on the inner side of the cylinder member and is communicated with the accommodating cavity.

[0010] Preferably, an annular groove is provided on the outer surface of the movable rod, and when the movable rod moves to a predetermined position, the annular groove overlaps with the oil inlet.

[0011] Preferably, the rust knocking mechanism further includes an elastic member, which is also located in the container and between the movable rod and the cover body. One end of the elastic member is fixed to the movable rod, and the other end is a free end.

[0012] Preferably, the rust knocking assembly further includes a connecting rod and a fixed box, one end of the connecting rod is fixed to the fixed box, and the other end is connected to the fixed bracket; a plurality of rust knocking mechanisms are provided, and the rust knocking mechanisms are fixed in the fixed box, and the rust knocking heads of the rust knocking mechanisms extend out of the lower part of the fixed box.

[0013] Preferably, the knocking box includes a box body and a box cover, a lower fixing hole is provided at the bottom of the box body, and an upper fixing hole is provided on the cover body, the cover body of the rust knocking mechanism includes a cover edge and a cover body, the diameter of the cover edge is larger than the diameter of the cover body; the diameter of the cover body is adapted to the diameter of the upper fixing hole, and the diameter of the cover edge is larger than the diameter of the upper fixing hole; the diameter of the rust knocking head is adapted to the diameter of the lower fixing hole, and the diameter of the air cylinder part is larger than the diameter of the lower fixing hole; the rust knocking mechanism is fixed in the fixed box by the upper fixing hole and the lower fixing hole.

[0014] Preferably, the connecting rod is a pneumatic telescopic rod, and the rust knocking assembly further includes a buffer spring, which is sleeved on the connecting rod, one end of the buffer spring abuts against the knocking box, and the other end abuts against the fixed bracket.

[0015] Preferably, the rust knocking head and the movable rod are detachably fixedly connected; or,

[0016] The rust knocking device further comprises a head cover, which is sleeved on the outside of the rust knocking head, and the head cover and the rust knocking head are detachably fixedly connected.

[0017] Preferably, a plurality of rollers and a motor are fixed on the fixed bracket, the rust knocking assembly is located between the plurality of rollers, the motor drives the rollers to rotate, a handle and a controller are fixed on the fixed bracket, and the controller is electrically connected to the motor; the rust knocking device also includes an obstacle sensor, which is also electrically connected to the controller.

[0018] The rust knocking device for a ship of the present invention is provided with a rust knocking mechanism, which includes an air cylinder, a movable rod and a cover body. A first air cavity and an air bleed hole are provided on the movable rod. When the air pump inflates the first cavity, the air pressure can press the movable rod down. When the air bleed hole is exposed from the air cylinder, the gas in the first air cavity is released from the air bleed hole. The force exerted by the movable rod colliding with the deck will cause the movable rod to rebound, and then the next round of knocking action will be performed, which can imitate the knocking action of a hammer.

[0019] Due to the provision of a second air chamber, a knocking head and a knocking rod, the air pressure can press the knocking rod downward. When the reaction force exerted by the deck on the knocking rod is too large, the knocking rod will retract. Multiple knocking rods can be adjusted according to the shape of the deck surface, making it suitable for rust spots of different shapes. Even the bottom of a bowl-shaped rust spot can be cleaned, achieving a better rust removal effect.

[0020] Since the pressure of the first air cavity is greater than the pressure of the second air cavity, and a connecting air path is provided between the two cavities, a one-way pressure valve is provided on the connecting air path for opening when the pressure of the second air cavity is greater than the pressure of the first air cavity. When the pressure of the second air cavity is too high, the pressure can be released through the connecting air path, thereby adjusting the striking force and maintaining the striking elastic effect of the second air cavity;

[0021] Since the air cylinder is provided with a sealing oil groove and the outer surface of the movable rod is provided with an annular groove, when the movable rod moves to a predetermined position, the annular groove and the oil inlet coincide with each other. At this time, the oil inlet is no longer sealed, and a small amount of sealing oil will enter between the air cylinder and the movable rod, playing the role of oil sealing and lubrication;

[0022] An elastic member is provided between the movable rod and the cover body to buffer the movable rod;

[0023] A head cover is provided, or the rust knocking head and the movable rod are detachably fixedly connected, the rust knocking head or the head cover can be replaced, and the state of the knocking rod can be selected when in use;

[0024] A motor, a roller, a controller and an obstacle sensor are arranged so that the rust knocking device can automatically knock out rust. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other purposes, features and advantages of the present invention will become more apparent by describing in more detail the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the accompanying drawings, and the drawings are not intentionally scaled to actual size, but rather are intended to illustrate the subject matter of the present invention.

[0026] Figure 1 This is an overall structural diagram of the ship rust knocking device of the present invention;

[0027] Figure 2 This is an overall structural diagram of the rust knocking assembly of the present invention;

[0028] Figure 3 It is the overall structural diagram of the box of the present invention;

[0029] Figure 4 It is a front view of the rust knocking mechanism of the present invention;

[0030] Figure 5 An exploded view of a rust knocking mechanism according to a preferred embodiment of the present invention;

[0031] Figure 6 An exploded view of a rust knocking mechanism according to another embodiment of the present invention;

[0032] Figure 7 A cross-sectional view of the air cylinder component of the present invention;

[0033] Figure 8-1 It is a cross-sectional view of the movable rod, the rust knocking head and the head cover of the present invention;

[0034] Figure 8-2 This is a cross-sectional view of a movable rod, a rust knocking head, and a head cover according to another embodiment.

[0035] In the figure: 1. Fixed bracket; 2. Rust knocking assembly; 3. Rust knocking mechanism; 31. Cylinder part; 311. Sealing oil tank; 312. Oil outlet; 313. Oil inlet; 32. Movable rod; 321. First air cavity; 322. Second air cavity; 323. Air bleed hole; 324. Annular groove; 33. Cover; 34. Rust knocking head; 35. Knocking rod; 36. Elastic part; 37. Connecting air path; 4. Connecting rod; 41. Buffer spring; 5. Fixed box; 51. Box body; 511. Lower fixing hole; 52. Box cover; 521. Upper fixing hole; 6. Head cover; 7. Roller; 8. Motor; 9. Controller; 10. Handle. DETAILED DESCRIPTION

[0036] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings.

[0037] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element. The terms "mounted", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] refer to Figure 1 -8, the present invention provides a rust knocking device for ships, comprising a fixed bracket 1 and a rust knocking assembly 2, wherein the rust knocking assembly 2 is fixed to the lower part of the fixed bracket 1, and the rust knocking end of the rust knocking assembly 2 faces downwards, and is used to knock the rust on the deck. Figure 4 The rust knocking assembly 2 includes a rust knocking mechanism 3, which includes an air cylinder part 31, a movable rod 32 and a cover body 33. The air cylinder part 31 is provided with a receiving cavity with one end open, and the movable rod 32 is located in the receiving cavity. The cover body 33 is fixedly connected to the air cylinder part 31 and covers the receiving cavity, and the movable rod 32 moves up and down along the receiving cavity. Referring to Figure 8, the movable rod 32 is provided with a first air cavity 321 and a second air cavity 322. The first air cavity 321 is located above the second air cavity 322. The movable rod 32 is also provided with an air bleed hole 323. The air bleed hole 323 is connected to the first air cavity 321. The first air cavity 321 and the second air cavity 322 are both connected to an external air pump. The air pump introduces gas into the first air cavity 321 to increase its air pressure, which presses the movable rod 32 downward. When the movable rod 32 moves down to the air bleed hole 323 and is exposed from the air cylinder 31, the pressure in the first air cavity 321 is released. After the movable rod 32 hits the deck, the reaction force causes the movable rod 32 to move upward, the air bleed hole 323 is covered again, and the air pressure in the first air cavity 321 is increased again. This is repeated, which can imitate a hammer hitting the deck, thereby knocking off the rust. Figure 8-1 The knocking member includes a knocking head 34 and a plurality of knocking rods 35. The knocking head 34 is fixedly connected to the lower end of the movable rod 32, and a second air cavity 322 is sealed. The first end of the knocking rod 35 is located in the second air cavity 322, and the second end of the knocking rod 35 passes through the knocking head 34 and extends out from the lower part of the knocking head 34. Due to the second air cavity 322, the knocking head 34, and the knocking rods 35, air pressure can press the knocking rods 35 downward. When the reaction force exerted by the deck on the knocking rods 35 is too great, the knocking rods 35 will retract. The multiple knocking rods 35 can be adjusted according to the shape of the deck surface, making them suitable for rust spots of different shapes. Even the bottom of a bowl-shaped rust spot can be cleaned, achieving a better rust removal effect.

[0040] refer to Figure 8-2 In a preferred embodiment, the pressure in the first air chamber 321 is greater than the pressure in the second air chamber 322, and a connecting air path 37 is provided between the two chambers. The connecting air path 37 is provided with a one-way pressure valve for opening when the pressure in the second air chamber 322 exceeds the pressure in the first air chamber 321. Due to the air pressure in the second air chamber 322, an elastic cavity is formed during the rust knocking process. Pressure changes occur as the knocking rods 35 slide up and down. When multiple knocking rods 35 move upward sufficiently, the pressure in the second air chamber 322 may exceed the pressure in the first air chamber 321, indicating that the knocking force is strong. However, if the knocking force exceeds a certain level, the rust spots will be pressed against the shipboard. Even if the main rust is removed, the remaining rust marks will be more difficult to clean. After painting, new rust spots will quickly form. In the present application, the arrangement of the connecting air path 37 and the one-way pressure valve ensures that when the pressure in the second air chamber 322 exceeds the pressure in the first air chamber 321, the pressure in the second air chamber 322 is released into the first air chamber 321, thereby preventing excessive pressure in the second air chamber 322 and ensuring its elastic function. Of course, the two air chambers can also be pressured by independent air pumps, and when the pressure in the second air chamber 322 falls below a preset value, air is added to increase the pressure.

[0041] Referring to Figure 8, in a preferred embodiment, the first end of the knocking rod 35 is provided with a rod head, the diameter of the rod head is larger than the diameter of the knocking rod 35, and the upper part of the rod head is provided with an air pressure groove, that is, a groove formed on the surface of the rod head, and the air pressure acts on the knocking rod 35 with greater force.

[0042] refer to Figure 7 As shown in Figure 8, in a preferred embodiment, a sealed oil groove 311 is further provided on the cylinder member 31, the oil inlet 313 of the sealed oil groove 311 is located at the upper part of the cylinder member 31, and the oil outlet 312 of the sealed oil groove 311 is located on the inner side of the cylinder member 31 and is communicated with the accommodating cavity. A small amount of oil in the sealed oil groove 311 can penetrate into between the movable rod 32 and the cylinder member 31 through the oil outlet 312.

[0043] refer to Figure 7 8 , in a further preferred embodiment, an annular groove 324 is provided on the outer surface of the movable rod 32. When the movable rod 32 moves to a predetermined position, the annular groove 324 overlaps the oil inlet 313. At this time, the oil inlet 313 is no longer sealed, and the oil intake can be increased, thus playing the role of oil sealing and lubrication.

[0044] refer to Figure 5 and Figure 6In a preferred embodiment, the rust knocking mechanism 3 further includes an elastic member 36. The elastic member 36 is also located in the container. The elastic member 36 is located between the movable rod 32 and the cover body 33. One end of the elastic member 36 is fixed to the movable rod 32, and the other end is a free end. In one embodiment, the elastic member 36 is a spring. In another embodiment, the elastic member 36 is a buffer pad. The buffer pad is made of metal material. A buffer air groove is formed between the buffer pad and the cover body 33. The buffer air groove is connected to the air pump. When the movable rod 32 is rebounded, it first collides with the buffer pad. The buffer pad can play a buffering role due to the effect of air pressure. In this embodiment, the buffer pad seals the first air cavity 321 of the movable rod 32.

[0045] refer to Figure 2 and Figure 3 In a preferred embodiment, the rust knocking assembly 2 also includes a connecting rod 4 and a fixed box 5, one end of the connecting rod 4 is fixed on the fixed box 5, and the other end is connected to the fixed bracket 1; a plurality of rust knocking mechanisms 3 are provided, and the rust knocking mechanisms 3 are fixed in the fixed box 5, and the rust knocking heads 34 of the rust knocking mechanisms 3 extend out of the lower part of the fixed box 5.

[0046] refer to Figure 2 and Figure 3 In a preferred embodiment, the knocking box includes a box body 51 and a box cover 52. A lower fixing hole 511 is provided at the bottom of the box body 51, and an upper fixing hole 521 is provided on the cover body 33. The cover body 33 of the rust knocking mechanism 3 includes a cover edge and a cover body, and the diameter of the cover edge is larger than the diameter of the cover body. The diameter of the cover body is adapted to the diameter of the upper fixing hole 521, and the diameter of the cover edge is larger than the diameter of the upper fixing hole 521. The diameter of the rust knocking head 34 is adapted to the diameter of the lower fixing hole 511, and the diameter of the air cylinder part 31 is larger than the diameter of the lower fixing hole 511. The rust knocking mechanism 3 is fixed in the fixing box 5 by the upper fixing hole 521 and the lower fixing hole 511. Specifically, the rust knocking head 34 is inserted into the lower fixing hole 511. After the cover body 33 is closed, the cover body is inserted into the upper fixing hole 521. Since the diameter of the cover edge is larger than the upper fixing hole 521, the diameter of the air cylinder part 31 is larger than the lower fixing hole 511. After the box cover 52 is fixed on the box body 51, the rust knocking mechanism 3 can be fixed in the knocking box.

[0047] refer to Figure 2 and Figure 3In a preferred embodiment, the connecting rod 4 is a pneumatic telescopic rod, and the rust knocking assembly 2 also includes a buffer spring 41, which is sleeved on the connecting rod 4, one end of the buffer spring 41 abuts against the knocking box, and the other end abuts against the fixed bracket 1. When the knocking device knocks the deck, a relatively strong vibration will be generated, and the buffer spring 41 offsets the intensity of the vibration. In a preferred embodiment, the rust knocking head 34 and the movable rod 32 are detachably fixedly connected. If the rust knocking head 34 is damaged, a new rust knocking head 34 can be replaced. Different rust knocking heads 34 can also be selected as needed. For example, the pattern of the rust knocking head 34 can be replaced as needed, and a rust knocking head 34 without a knocking rod 35 can also be selected. In another embodiment, the rust knocking device also includes a head cover 6, which is sleeved on the outside of the rust knocking head 34, and the head cover 6 and the rust knocking head 34 are detachably fixedly connected. In this embodiment, the head cover 6 and the rust knocking head 34 are clamped and fixed, and the head cover 6 can be installed as needed.

[0048] refer to Figure 1 In a preferred embodiment, a plurality of rollers 7 and a motor 8 are fixed on the fixed bracket 1, the rust knocking assembly 2 is located between the plurality of rollers 7, the motor 8 drives the rollers 7 to rotate, a handle 10 and a controller 9 are fixed on the fixed bracket 1, and the controller 9 and the motor 8 are electrically connected; the rust knocking device also includes an obstacle sensor, which is also electrically connected to the controller 9, so that the rust knocking device can automatically knock rust.

[0049] During operation, the rust knocking device is pushed to the position where rust needs to be knocked off, and the power supply and air pump are connected; then, the height of the rust knocking mechanism 3 is adjusted by the pneumatic telescopic rod, and the air cylinder part 31 covers the air vent 323; the air pump is turned on, and negative pressure is first drawn to retract the movable rod 32; the height of the rust knocking mechanism 3 is adjusted again, so that the height of the rust knocking head 34 is at a suitable position from the deck; the mode of the air pump is adjusted so that it inflates the first air cavity 321 and the second air cavity 322 and enters the rust knocking mode; when knocking off rust, after knocking on the same position for a predetermined time, the rust knocking mechanism 3 automatically moves and changes the knocking position.

[0050] The rust knocking device for ships of the present invention is provided with a rust knocking mechanism 3, which includes an air cylinder 31, a movable rod 32 and a cover 33. The movable rod 32 is provided with a first air cavity 321 and an air bleed hole 323. When the air pump inflates the first cavity, the air pressure can press the movable rod 32 down. When the air bleed hole 323 is exposed from the air cylinder, the gas in the first air cavity 321 is exposed from the air bleed hole 323. The force exerted by the movable rod 32 colliding with the deck will cause the movable rod 32 to rebound, and then the next round of knocking action will be performed, which can imitate the knocking action of a hammer.

[0051] Due to the provision of the second air cavity 322, the rust knocking head 34 and the knocking rod 35, the air pressure can press the knocking rod 35 downward. When the reaction force exerted by the deck on the knocking rod 35 is too large, the knocking rod 35 will retract. The multiple knocking rods 35 can be adjusted according to the shape of the deck surface, so that they can be used for rust spots of different shapes. Even the bottom of the rust spot in the bowl can be cleaned, and the rust removal effect is better.

[0052] Since the air cylinder member 31 is provided with a sealing oil groove 311 and the outer surface of the movable rod 32 is provided with an annular groove 324, when the movable rod 32 moves to a predetermined position, the annular groove 324 and the oil inlet 313 coincide with each other. At this time, the oil inlet 313 is no longer sealed, and a small amount of sealing oil will enter between the air cylinder member 31 and the movable rod 32, playing the role of oil sealing and lubrication.

[0053] An elastic member 36 is provided between the movable rod 32 and the cover 33 to buffer the movable rod 32;

[0054] A head cover 6 is provided, or the rust knocking head 34 and the movable rod 32 are detachably fixedly connected, the rust knocking head 34 or the head cover 6 can be replaced, and the state of the knocking rod 35 can be selected when in use;

[0055] A motor 8, a roller 7, a controller 9 and an obstacle sensor are provided so that the rust knocking device can automatically knock out rust.

[0056] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above embodiments merely represent specific implementation methods of the invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be based on the appended claims.

Claims

1. A rust-removing device for ships, characterized in that: It includes a fixed bracket and a rust knocking assembly, wherein the rust knocking assembly is fixed to the lower part of the fixed bracket; The rust knocking assembly includes a rust knocking mechanism, which includes a cylinder, a movable rod and a cover body. The cylinder is provided with a receiving cavity with one end being open. The movable rod is located in the receiving cavity. The cover body is fixedly connected to the cylinder and covers the receiving cavity. The movable rod is provided with a first air cavity and a second air cavity, wherein the first air cavity is located above the second air cavity, and the movable rod is further provided with an air leakage hole, wherein the air leakage hole is connected to the first air cavity, and both the first air cavity and the second air cavity are connected to an external air pump; The knocking piece includes a rust knocking head and multiple knocking rods. The rust knocking head is fixedly connected to the lower end of the movable rod and seals the second air cavity. The first end of the knocking rod is located in the second air cavity, and the second end of the knocking rod passes through the rust knocking head and extends out from the lower part of the rust knocking head.

2. The rust knocking device for ships according to claim 1, characterized in that: The pressure of the first air cavity is greater than the pressure of the second air cavity, and a connecting air path is provided between the two cavities. A one-way pressure valve is provided on the connecting air path for opening when the pressure of the second air cavity is greater than the pressure of the first air cavity. The first end of the knocking rod is provided with a rod head, the diameter of the rod head is greater than the diameter of the knocking rod, and an air pressure groove is provided on the upper part of the rod head.

3. The rust knocking device for ships according to claim 1, characterized in that: The cylinder part is also provided with a sealing oil groove, the oil inlet of the sealing oil groove is located at the upper part of the cylinder part, and the oil outlet of the sealing oil groove is located on the inner side of the cylinder part and is communicated with the accommodating cavity.

4. The rust knocking device for ships according to claim 3, characterized in that: An annular groove is provided on the outer surface of the movable rod. When the movable rod moves to a predetermined position, the annular groove overlaps with the oil inlet.

5. The rust knocking device for ships according to claim 1, characterized in that: The rust knocking mechanism further comprises an elastic member, which is also located in the container and between the movable rod and the cover body. One end of the elastic member is fixed on the movable rod, and the other end is a free end.

6. The rust knocking device for ships according to claim 1, characterized in that: The rust knocking assembly also includes a connecting rod and a fixed box, one end of the connecting rod is fixed on the fixed box, and the other end is connected to the fixed bracket; multiple rust knocking mechanisms are provided, and the rust knocking mechanisms are fixed in the fixed box, and the rust knocking heads of the rust knocking mechanisms extend out of the lower part of the fixed box.

7. The rust-removing device for ships according to claim 6, characterized in that: The knocking box includes a box body and a box cover, a lower fixing hole is provided at the bottom of the box body, and an upper fixing hole is provided on the cover body, the cover body of the rust knocking mechanism includes a cover edge and a cover body, the diameter of the cover edge is larger than the diameter of the cover body; the diameter of the cover body is adapted to the diameter of the upper fixing hole, and the diameter of the cover edge is larger than the diameter of the upper fixing hole; the diameter of the rust knocking head is adapted to the diameter of the lower fixing hole, and the diameter of the air cylinder part is larger than the diameter of the lower fixing hole; the rust knocking mechanism is fixed in the fixed box by the upper fixing hole and the lower fixing hole.

8. The rust-removing device for ships according to claim 6, characterized in that: The connecting rod is a pneumatic telescopic rod, and the rust knocking assembly further includes a buffer spring, which is sleeved on the connecting rod. One end of the buffer spring abuts against the knocking box, and the other end abuts against the fixed bracket.

9. The rust knocking device for ships according to claim 1, characterized in that: The rust knocking head and the movable rod are detachably fixedly connected; or, The rust knocking device further comprises a head cover, which is sleeved on the outside of the rust knocking head, and the head cover and the rust knocking head are detachably fixedly connected.

10. The rust knocking device for ships according to claim 1, characterized in that: A plurality of rollers and a motor are fixed on the fixed bracket, the rust knocking assembly is located between the plurality of rollers, the motor drives the rollers to rotate, a handle and a controller are fixed on the fixed bracket, and the controller is electrically connected to the motor; the rust knocking device also includes an obstacle sensor, which is also electrically connected to the controller.

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