Bow anchor ball structure for dredger

Abstract

The invention discloses a bow anchor ball structure for a dredger, and belongs to the technical field of anchor balls. A ship bow anchor ball structure for a dredger comprises a mounting plate mounted at a ship bow, a supporting plate is fixedly arranged at the top of the mounting plate, a rotating rod is rotationally connected to the supporting plate, a supporting telescopic rod is fixedly arranged on the rotating rod, and a first motor used for driving the rotating rod to rotate is fixedly arranged on the supporting plate; an upper connecting plate and a lower connecting plate are arranged at the top and the bottom of the supporting telescopic rod correspondingly, a guide part is arranged between the upper connecting plate and the lower connecting plate, a stainless steel anchor ball is slidably connected to the guide part, and a winding assembly used for lifting the stainless steel anchor ball is arranged on the mounting plate; the stainless steel anchor ball replaces a nylon rope anchor ball, the replacement and maintenance period of the anchor ball is prolonged, the service life of the anchor ball is prolonged, the installation cost of the anchor ball is reduced, the top end of the supporting telescopic rod is moved downwards by overturning the supporting telescopic rod, the installation difficulty of the stainless steel anchor ball is reduced, and the installation efficiency of the anchor ball is improved.

Description

Technical Field

[0001] The invention relates to the technical field of anchor balls, and in particular to a bow anchor ball structure for a dredging vessel. Background Art

[0002] When a ship is anchored, it is required to hang an anchor ball at the bow to indicate the anchoring status of the ship. Therefore, the anchor ball must be reliable and durable.

[0003] The anchor ball hung by the ship when it was anchored was made of nylon rope. There are often strong winds of 7-8 at sea, and even strong winds of 10-12 during typhoon prevention. The nylon rope anchor ball is exposed to wind, sun, and the influence of such harsh climate at sea. It is very easy to tear and corrode. It often breaks and needs to be replaced. It consumes a lot of energy and has high installation cost. It also needs to be climbed for maintenance every time, which poses a great safety hazard. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a bow anchor ball structure for a dredging vessel.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A bow anchor ball structure for a dredger comprises a mounting plate installed at the bow, a support plate is fixedly provided on the top of the mounting plate, a rotating rod is rotatably connected to the support plate, a supporting telescopic rod is fixedly provided on the rotating rod, a first motor for driving the rotating rod to rotate is fixedly provided on the support plate, an upper connecting plate and a lower connecting plate are respectively provided on the top and bottom of the supporting telescopic rod, a guide member is provided between the upper connecting plate and the lower connecting plate, a stainless steel anchor ball is slidably connected to the guide member, and a winding assembly for lifting the stainless steel anchor ball is provided on the mounting plate.

[0007] Preferably, the supporting telescopic rod includes a lower tube body fixedly connected to the rotating rod, an upper rod body slidably connected to the lower tube body, and a first elastic element arranged between the upper rod body and the lower tube body, the upper connecting plate is fixedly connected to the upper rod body, the lower connecting plate is fixedly connected to the lower tube body, and a positioning assembly for fixing to the lower tube body is arranged in the upper rod body.

[0008] Preferably, the positioning assembly includes a movable groove opened at the bottom of the upper rod body, a positioning block is slidably connected in the movable groove, a second elastic element is arranged between the positioning block and the inner wall of the movable groove, and a positioning hole matching the positioning block is opened on the inner wall of the lower tube body.

[0009] Preferably, an ear plate is fixedly provided on the mounting plate, and a rotating shaft is rotatably connected to the ear plate, and a driven gear and a reel are provided on the rotating shaft, and a first pull rope is wound around the reel, and the end of the first pull rope away from the reel passes through the lower tube body and the upper rod body in sequence and is connected to the positioning block, and a driving gear meshing with the driven gear is provided on the rotating rod.

[0010] Preferably, the winding assembly includes a support fixed on the mounting plate, a second motor is fixed on the support, the output shaft of the second motor is connected to a winding rod rotating on the support, a second pull rope is wound around the winding rod, and the end of the second pull rope away from the winding rod passes through the upper connecting plate and is connected to the stainless steel anchor ball.

[0011] Preferably, the stainless steel anchor ball includes two circular plates and several stainless steel bars bent into an arc shape, the two ends of the stainless steel bars are respectively welded on the two circular plate planes, a reinforcement ring is arranged between the several stainless steel bars, and a connecting piece slidably connected to the guide piece is arranged on the outer side of the reinforcement ring.

[0012] Preferably, the guide member comprises lifting rings respectively arranged on the upper connecting plate and the lower connecting plate, and a positioning rope is arranged between the upper and lower lifting rings.

[0013] Preferably, the connecting member includes a ring slidably connected to the reinforcement ring, the outer wall of the ring is provided with a connecting frame cooperating with the positioning rope, the inner wall of the connecting frame is fixed with an arc-shaped limit block that resists the movement of the positioning rope, and the end of the connecting frame away from the ring is provided with an opening for the positioning rope to enter, and two elastic locking blocks with inclined surfaces are provided at the opening.

[0014] Preferably, an annular groove is provided on the inner wall of the ring, and a limit seat matching the annular groove is provided on the outer wall of the reinforcement ring. A connecting tube which is sleeved on the outside of the second pull rope is fixedly provided on the circular plate on the upper side of the stainless steel anchor ball, and an air guide plate is provided on the outside of the connecting tube. A rotating block connected to the second pull rope is rotatably provided on the circular plate.

[0015] Preferably, an outer arc rod is fixedly provided on the outer side of the ring, and the outer arc rod is connected to an inner arc rod placed inside the stainless steel anchor ball through a connecting rod. The outer arc rod and the inner arc rod are both provided with a plurality of rotating cylinders, and the rotating cylinders are provided with wire brushes that are movably opposed to the stainless steel anchor ball.

[0016] Compared with the prior art, the present invention provides a bow anchor ball structure for a dredger, which has the following beneficial effects:

[0017] 1. The bow anchor ball structure of the dredger replaces the nylon rope anchor ball with a stainless steel anchor ball, thereby extending the anchor ball replacement and maintenance cycle, extending the service life of the anchor ball, and reducing the installation cost of the anchor ball. The first motor drives the supporting telescopic rod to flip, so that the top of the supporting telescopic rod moves downward, thereby reducing the difficulty of installing the stainless steel anchor ball and improving the installation efficiency of the anchor ball.

[0018] 2. The bow anchor ball structure of the dredger controls the flipping of the supporting telescopic rod and at the same time makes the first pull rope pull down the upper rod body, so that the upper rod body contracts into the lower tube body, thereby reducing the overall length of the supporting telescopic rod, facilitating the reduction of the operation and movement range of the staff, further reducing the difficulty of installing the stainless steel anchor ball, and effectively improving the installation efficiency of the anchor ball.

[0019] 3. The bow anchor ball structure of the dredger is convenient for guiding and limiting the lifting and lowering of the stainless steel anchor ball by setting a guide between the upper connecting plate and the lower connecting plate, so as to avoid the stainless steel anchor ball from shaking randomly, causing the stainless steel anchor ball to collide and be damaged with other structures of the bow, thereby reducing the maintenance cost of the ship.

[0020] 4. The bow anchor ball structure of the dredger can rotate the stainless steel anchor ball relative to the guide member so that the stainless steel anchor ball can rotate automatically under the wind force when its position is restricted, so that the seawater often carried by the outside of the stainless steel anchor ball due to wind and waves can fall off quickly under the action of centrifugal force. During this period, the rust on the stainless steel anchor ball can be scraped off, which effectively delays the corrosion of the stainless steel anchor ball and extends the replacement and maintenance cycle of the stainless steel anchor ball. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 A partial enlarged structural diagram of the middle part;

[0023] Figure 3 It is a partial cross-sectional structural schematic diagram of the present invention;

[0024] Figure 4 For the present invention Figure 3 A schematic diagram of the partially enlarged structure of the middle B part;

[0025] Figure 5 It is a schematic diagram of the external structure of the stainless steel anchor ball of the present invention;

[0026] Figure 6 For the present invention Figure 5 A schematic diagram of the partially enlarged structure of the middle C part;

[0027] Figure 7 It is a schematic diagram of the external structure of the sleeve ring of the present invention.

[0028] In the figure: 1, mounting plate; 2, support plate; 201, rotating rod; 2011, driving gear; 202, first motor; 3, supporting telescopic rod; 301, lower tube; 3011, positioning hole; 302, upper rod; 303, first elastic element; 4, upper connecting plate; 5, lower connecting plate; 6, guide; 7, stainless steel anchor ball; 701, round plate; 7011, rotating block; 702, stainless steel bar; 703, reinforcing ring; 7031, limit seat; 8, movable groove; 801, positioning block; 802, second elastic Sexual element; 9, ear plate; 901, rotating shaft; 902, driven gear; 903, reel; 9031, first pull rope; 10, support; 11, second motor; 111, reel rod; 112, second pull rope; 12, lifting ring; 121, positioning rope; 13, sleeve; 131, annular groove; 14, connecting frame; 141, arc limit block; 142, elastic locking block; 15, connecting pipe; 151, air guide plate; 16, outer arc rod; 161, inner arc rod; 162, rotating drum; 163, wire brush. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example: Refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 A bow anchor ball structure for a dredger comprises a mounting plate 1 mounted at the bow, a support plate 2 is fixedly arranged on the top of the mounting plate 1, a rotating rod 201 is rotatably connected to the support plate 2, a supporting telescopic rod 3 is fixedly arranged on the rotating rod 201, a first motor 202 for driving the rotating rod 201 to rotate is fixedly arranged on the support plate 2, an upper connecting plate 4 and a lower connecting plate 5 are respectively arranged on the top and bottom of the supporting telescopic rod 3, a guide member 6 is arranged between the upper connecting plate 4 and the lower connecting plate 5, a stainless steel anchor ball 7 is slidably connected to the guide member 6, and a winding component for lifting the stainless steel anchor ball 7 is arranged on the mounting plate 1.

[0033] Specifically, when installing the stainless steel anchor ball 7, the staff controls the operation of the first motor 202, the output shaft of the first motor 202 drives the rotating rod 201 to rotate, and the rotating rod 201 drives the supporting telescopic rod 3 to flip, so that the top of the supporting telescopic rod 3 moves downward, thereby reducing the difficulty of installing the stainless steel anchor ball 7 and improving the efficiency of anchor ball installation. By replacing the nylon rope anchor ball with the stainless steel anchor ball 7, it is convenient to extend the anchor ball replacement and maintenance cycle, extend the service life of the anchor ball, and reduce the installation cost of the anchor ball. When the ship needs to anchor, the winding assembly is controlled to move, so that the winding assembly drives the stainless steel anchor ball 7 to move up along the guide member 6, which is convenient for guiding and limiting the lifting and lowering of the stainless steel anchor ball 7, avoiding the stainless steel anchor ball 7 from shaking at will, causing the stainless steel anchor ball 7 to collide with other structures of the bow and be damaged, thereby reducing the maintenance cost of the ship.

[0034] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As a preferred technical solution of the present invention, the supporting telescopic rod 3 includes a lower tube body 301 fixedly connected to the rotating rod 201, an upper rod body 302 slidably connected in the lower tube body 301, and a first elastic element 303 arranged between the upper rod body 302 and the lower tube body 301, the upper connecting plate 4 is fixedly connected to the upper rod body 302, the lower connecting plate 5 is fixedly connected to the lower tube body 301, and a positioning component for fixing to the lower tube body 301 is arranged in the upper rod body 302.

[0035] Furthermore, the positioning assembly includes a movable groove 8 opened at the bottom of the upper rod body 302, a positioning block 801 is slidably connected in the movable groove 8, a second elastic element 802 is arranged between the positioning block 801 and the inner wall of the movable groove 8, and a positioning hole 3011 matching the positioning block 801 is opened on the inner wall of the lower tube body 301.

[0036] Furthermore, an ear plate 9 is fixedly provided on the mounting plate 1, and a rotating shaft 901 is rotatably connected to the ear plate 9, and a driven gear 902 and a reel 903 are provided on the rotating shaft 901, and a first pull rope 9031 is wound around the reel 903, and one end of the first pull rope 9031 away from the reel 903 passes through the lower tube body 301 and the upper rod body 302 in sequence and is connected to the positioning block 801, and a driving gear 2011 meshing with the driven gear 902 is provided on the rotating rod 201.

[0037] Specifically, the staff controls the first motor 202 to operate, the output shaft of the first motor 202 drives the rotating rod 201 to rotate, the rotating rod 201 drives the supporting telescopic rod 3 to flip, so that the top of the supporting telescopic rod 3 moves downward, and during the rotation of the rotating rod 201, the outer driving gear 211 meshes with the driven gear 902 to drive the driven gear 902 to drive the reel 903 to reel the first pull rope 9031, the first pull rope 9031 is set as a steel wire rope, and the first pull rope 9031 pulls the positioning block 801, and the positioning Block 801 is forced to move toward the inside of the movable groove 8 and out of the positioning hole 3011, thereby releasing the movement restriction between the upper rod body 302 and the lower tube body 301. As the first pull rope 9031 is continuously wound, the first pull rope 9031 pulls the upper rod body 302 downward through the positioning block 801, causing the upper rod body 302 to shrink into the lower tube body 301, thereby reducing the overall length of the supporting telescopic rod 3, making it easier to reduce the operation and movement range of the staff, further reducing the difficulty of installing the stainless steel anchor ball 7, and effectively improving the installation efficiency of the anchor ball.

[0038] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As a preferred technical solution of the present invention, the winding assembly includes a support 10 fixed on the mounting plate 1, a second motor 11 is fixed on the support 10, the output shaft of the second motor 11 is connected to a winding rod 111 rotating on the support 10, a second pull rope 112 is wound around the winding rod 111, and one end of the second pull rope 112 away from the winding rod 111 passes through the upper connecting plate 4 and is connected to the stainless steel anchor ball 7.

[0039] Furthermore, the stainless steel anchor ball 7 includes two circular plates 701 and a plurality of stainless steel bars 702 bent into an arc shape, the two ends of the stainless steel bars 702 are respectively welded on the planes of the two circular plates 701, a reinforcement ring 703 is arranged between the plurality of stainless steel bars 702, and a connecting piece slidably connected to the guide piece 6 is arranged on the outer side of the reinforcement ring 703.

[0040] Furthermore, the guide member 6 includes lifting rings 12 respectively arranged on the upper connecting plate 4 and the lower connecting plate 5 , and a positioning rope 121 is arranged between the upper and lower lifting rings 12 .

[0041] Specifically, when the ship needs to anchor, the winding assembly is controlled to move, and the second motor 11 drives the winding rod 111 to reel in the second pull rope 112. The second pull rope 112 applies tension to the stainless steel anchor ball 7, so that the stainless steel anchor ball 7 moves up along the positioning rope 121, which is convenient for guiding and limiting the lifting and lowering of the stainless steel anchor ball 7, and avoiding the stainless steel anchor ball 7 from shaking at will, causing the stainless steel anchor ball 7 to collide with other structures of the bow and be damaged, which is convenient for reducing the maintenance cost of the ship, and by replacing the stainless steel anchor ball 7 with the nylon rope anchor ball, it is convenient to extend the anchor ball replacement and maintenance cycle, extend the service life of the anchor ball, and reduce the installation cost of the anchor ball. It should be noted that the second pull rope 112 and the positioning rope 121 are both made of steel wire rope.

[0042] Reference Figure 5 and Figure 6 As a preferred technical solution of the present invention, the connecting piece includes a ring 13 slidably connected to the reinforcement ring 703, the outer wall of the ring 13 is provided with a connecting frame 14 that cooperates with the positioning rope 121, the inner wall of the connecting frame 14 is fixed with an arc-shaped limit block 141 that is movably against the positioning rope 121, and the end of the connecting frame 14 away from the ring 13 is provided with an opening for the positioning rope 121 to enter, and two elastic locking blocks 142 with inclined surfaces are provided at the opening.

[0043] Specifically, when the stainless steel anchor ball 7 is connected to the guide member 6, the positioning rope 121 squeezes the inclined surface of the elastic locking block 142, so that the positioning rope 121 automatically enters the connecting frame 14, and the arc-shaped limit block 141 in the connecting frame 14 further restricts the positioning rope 121 to avoid the gap between the positioning rope 121 and the connecting frame 14 being too large, causing the stainless steel anchor ball 7 to shake randomly.

[0044] Reference Figure 5 , Figure 6 and Figure 7 As a preferred technical solution of the present invention, an annular groove 131 is provided on the inner wall of the ring 13, and a limit seat 7031 matching the annular groove 131 is provided on the outer wall of the reinforcement ring 703. A connecting tube 15 which is sleeved on the outside of the second pull rope 112 is fixedly provided on the circular plate 701 on the upper side of the stainless steel anchor ball 7, and an air guide plate 151 is provided on the outside of the connecting tube 15. A rotating block 7011 connected to the second pull rope 112 is rotatably provided on the circular plate 701.

[0045] Furthermore, an outer arc rod 16 is fixedly provided on the outer side of the ring 13, and the outer arc rod 16 is connected to an inner arc rod 161 placed inside the stainless steel anchor ball 7 through a connecting rod. The outer arc rod 16 and the inner arc rod 161 are both provided with a plurality of rotating cylinders 162, and the rotating cylinders 162 are provided with wire brushes 163 that are movably opposed to the stainless steel anchor ball 7.

[0046] Specifically, an air guide plate 151 is arranged on the outside of the connecting pipe 15, so that when the ship is sailing, the air guide plate 151 rotates due to the wind force, and the air guide plate 151 drives the stainless steel anchor ball 7 to rotate through the connecting pipe 15. The stainless steel anchor ball 7 rotates relative to the ring 13 connected to the guide member 6, so that the seawater often carried by the outside of the stainless steel anchor ball 7 due to wind and waves can fall off quickly under the action of centrifugal force. During this period, the wire brush 163 arranged on the outer arc rod 16 and the inner arc rod 161 can scrape off the rust on the inside and outside of the stainless steel anchor ball 7, effectively delaying the corrosion of the stainless steel anchor ball 7 and extending the replacement and maintenance cycle of the stainless steel anchor ball 7.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bow anchor ball structure for a dredger, comprising a mounting plate (1) mounted at the bow, characterized in that: A support plate (2) is fixedly provided on the top of the mounting plate (1), a rotating rod (201) is rotatably connected to the support plate (2), a supporting telescopic rod (3) is fixedly provided on the rotating rod (201), a first motor (202) for driving the rotating rod (201) to rotate is fixedly provided on the support plate (2), an upper connecting plate (4) and a lower connecting plate (5) are respectively provided on the top and bottom of the supporting telescopic rod (3), a guide member (6) is provided between the upper connecting plate (4) and the lower connecting plate (5), a stainless steel anchor ball (7) is slidably connected to the guide member (6), and a winding component for lifting the stainless steel anchor ball (7) is provided on the mounting plate (1).

2. The bow anchor ball structure for a dredger according to claim 1, characterized in that: The supporting telescopic rod (3) comprises a lower tube body (301) fixedly connected to the rotating rod (201), an upper rod body (302) slidably connected in the lower tube body (301), and a first elastic element (303) arranged between the upper rod body (302) and the lower tube body (301); the upper connecting plate (4) is fixedly connected to the upper rod body (302); the lower connecting plate (5) is fixedly connected to the lower tube body (301); and a positioning component for fixing to the lower tube body (301) is arranged in the upper rod body (302).

3. The bow anchor ball structure for a dredger according to claim 2, characterized in that: The positioning assembly comprises a movable groove (8) provided at the bottom of the upper rod body (302), a positioning block (801) being slidably connected in the movable groove (8), a second elastic element (802) being arranged between the positioning block (801) and the inner wall of the movable groove (8), and a positioning hole (3011) cooperating with the positioning block (801) being provided on the inner wall of the lower tube body (301).

4. The bow anchor ball structure for a dredger according to claim 3, characterized in that: The mounting plate (1) is fixedly provided with an ear plate (9), the ear plate (9) is rotatably connected with a rotating shaft (901), the rotating shaft (901) is provided with a driven gear (902) and a reel (903), the reel (903) is wound with a first pull rope (9031), one end of the first pull rope (9031) away from the reel (903) passes through the lower tube body (301) and the upper rod body (302) in sequence and is connected to the positioning block (801), and the rotating rod (201) is provided with a driving gear (2011) meshing with the driven gear (902).

5. The bow anchor ball structure for a dredger according to claim 4, characterized in that: The winding assembly comprises a support (10) fixed on the mounting plate (1), a second motor (11) fixed on the support (10), an output shaft of the second motor (11) connected to a winding rod (111) rotating on the support (10), a second pull rope (112) wound around the winding rod (111), an end of the second pull rope (112) away from the winding rod (111) passes through the upper connecting plate (4) and is connected to the stainless steel anchor ball (7).

6. The bow anchor ball structure for a dredger according to claim 5, characterized in that: The stainless steel anchor ball (7) comprises two circular plates (701) and a plurality of stainless steel bars (702) bent into an arc shape, the two ends of the stainless steel bars (702) are respectively welded on the planes of the two circular plates (701), a reinforcing ring (703) is arranged between the plurality of stainless steel bars (702), and a connecting piece slidably connected to the guide piece (6) is arranged on the outer side of the reinforcing ring (703).

7. The bow anchor ball structure for a dredger according to claim 6, characterized in that: The guide member (6) comprises lifting rings (12) respectively arranged on the upper connecting plate (4) and the lower connecting plate (5), and a positioning rope (121) is arranged between the upper and lower lifting rings (12).

8. The bow anchor ball structure for a dredger according to claim 7, characterized in that: The connecting member comprises a collar (13) slidably connected to a reinforcing ring (703); an outer wall of the collar (13) is provided with a connecting frame (14) cooperating with a positioning rope (121); an inner wall of the connecting frame (14) is provided with an arc-shaped limiting block (141) movably abutting against the positioning rope (121); an end of the connecting frame (14) away from the collar (13) is provided with an opening for the positioning rope (121) to enter; and two elastic locking blocks (142) with inclined surfaces are provided at the opening.

9. The bow anchor ball structure for a dredger according to claim 8, characterized in that: The inner wall of the collar (13) is provided with an annular groove (131), the outer wall of the reinforcing ring (703) is provided with a limit seat (7031) that matches the annular groove (131), the circular plate (701) on the upper side of the stainless steel anchor ball (7) is fixed with a connecting tube (15) that is sleeved on the outside of the second pull rope (112), the outer side of the connecting tube (15) is provided with an air guide plate (151), and a rotating block (7011) connected to the second pull rope (112) is rotatably provided on the circular plate (701).

10. The bow anchor ball structure for a dredger according to claim 9, characterized in that: An outer arc rod (16) is fixedly arranged on the outer side of the collar (13); the outer arc rod (16) is connected to an inner arc rod (161) arranged inside the stainless steel anchor ball (7) via a connecting rod; the outer arc rod (16) and the inner arc rod (161) are both provided with a plurality of rotating cylinders (162); and the rotating cylinders (162) are provided with steel wire brushes (163) that are movably opposed to the stainless steel anchor ball (7).

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