CN112894259A - Maintenance process of marine propeller - Google Patents

Abstract

The invention relates to the technical field of ship body maintenance, in particular to a maintenance process of a marine propeller, which has the technical scheme that: after the defects of the propeller blades are detected, firstly, welding repair is carried out on damaged parts of the propeller blades of the propeller, then, the propeller blades of the propeller are corrected in a bent mode, finally, the propeller blades of the propeller are ground on the surface, so that the maintenance of the marine propeller is completed, and in the propeller blade maintenance process of the propeller, the first housing and the second housing of the protective cover can be separated by stepping on the pedal, so that the coarse grinding wheel, the fine grinding wheel and the cloth grinding wheel can be replaced conveniently.

Description

Maintenance process of marine propeller

Technical Field

The invention relates to the technical field of ship body maintenance, in particular to a maintenance process of a marine propeller.

Background

The maintenance of the hull includes maintenance of a marine propeller for propelling the travel of the hull (see the hull 100 and the propeller 200 in fig. 1 and 2).

In the maintenance process of the marine propeller, the steps of defect inspection of the marine propeller, welding repair of the propeller, correction of blade bending, surface grinding of the blade and the like are generally included, wherein the surface grinding of the blade is used for cleaning dirt on the surface of the blade of the propeller or improving the surface smoothness of the blade of the propeller. Surface grinding of the blade is often performed using an abrasive machine, and the process of surface grinding can be divided into rough grinding, finish grinding and polishing by replacing the abrasive wheel during grinding.

The grinder used in the maintenance process of the marine propeller mainly comprises a base, a grinding wheel, a motor, a protective cover and the like, wherein the grinding wheel, the motor and the protective cover are all arranged on the base, the motor is used for driving the grinding wheel to rotate, and the protective cover is used for covering the grinding wheel to protect workers.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: in the maintenance process of the marine propeller, although the protective cover can protect workers in the surface grinding process of the propeller blade, when the grinding wheel is replaced, the protective cover covers the grinding wheel, so that the worker cannot replace the grinding wheel conveniently due to the existence of the protective cover, and the convenience of grinding the propeller blade is affected, and therefore the improvement on the propeller blade grinding process of the propeller in the maintenance process of the marine propeller is needed.

Disclosure of Invention

In order to improve the convenience of grinding the blades of the propeller, the application provides a maintenance process of the marine propeller.

The application provides a maintenance technology of marine screw adopts following technical scheme:

a maintenance process of a marine propeller comprises the following steps:

s1: inspecting the damaged part of the propeller to obtain the defects of each part;

s2: welding repair is carried out on the damaged part of the propeller;

s3: straightening the blade bending of a blade of the propeller;

s4: grinding the surface of the blade of the propeller by using a grinder;

s41: treading down the pedal, mounting a coarse grinding wheel sheet at the end part of the rotating shaft between the first housing and the second housing, standing at a position outside the pedal, and performing coarse grinding on the propeller blades of the propeller by using the coarse grinding wheel sheet;

s42: after coarse grinding is finished, treading down the pedal, taking down the coarse grinding wheel, mounting the fine grinding wheel at the end part of the rotating shaft between the first housing and the second housing, standing at a position outside the pedal, and performing fine grinding on the propeller blade of the propeller by using the fine grinding wheel;

s43: after finishing fine grinding, the pedal is stepped, the fine grinding wheel is taken down, the cloth grinding wheel is installed at the end part of the rotating shaft between the first housing and the second housing and then stands outside the pedal, and the paddle of the propeller is polished by the cloth grinding wheel.

Through adopting above-mentioned technical scheme, after checking the defect to the screw blade, weld repair to the damage part of the paddle of screw earlier, then carry out the crooked correction of paddle to the paddle of screw, carry out surface grinding to the paddle of screw at last, in order to accomplish the maintenance of marine screw, in the paddle maintenance process of screw, through stepping on the footboard, can make the first housing and the separation of second housing of protection casing, so that change thick emery wheel, thin emery wheel and cloth matter emery wheel, thereby improve the convenience that the paddle of screw ground.

The application still provides a grinder is used in marine screw maintenance, adopts following technical scheme:

a grinding machine for maintaining a marine propeller comprises a base, a grinding wheel, a motor, a protective cover and a protective cover control structure, wherein the base comprises a top plate, a middle plate and a bottom plate which are arranged from top to bottom, and supporting rods are connected among the top plate, the middle plate and the bottom plate;

the grinding wheel is horizontally and rotatably arranged on the top of the top plate, the motor is arranged on the top of the middle plate, a conveying structure is connected between the motor and the grinding wheel, and the motor drives the grinding wheel to rotate through the conveying structure;

the protective cover comprises a first cover shell and a second cover shell, the first cover shell and the second cover shell are respectively arranged on the top of the top plate in a sliding mode, and the first cover shell and the second cover shell can be close to or far away from each other through sliding;

the shield control structure controls the first housing and the second housing to approach or move away from each other.

Through adopting above-mentioned technical scheme, when utilizing this abrasive machine to carry out the surface grinding to the paddle of screw, the motor passes through transmission structure drive emery wheel and rotates to grind the work, at this in-process, when needs change the emery wheel, utilize protection casing control structure, can make the first housing and the second housing of protection casing be close to each other or keep away from each other fast, thereby be convenient for change the emery wheel, and then improve the convenience that the paddle of screw ground.

Preferably, the protective cover control structure comprises a pedal, a vertical polished rod, a horizontal polished rod, a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod;

a lifting cavity is formed in the top of the bottom plate downwards, the pedal slides in the lifting cavity vertically, a return spring is connected between the bottom of the pedal and the bottom of the lifting cavity, a plurality of cross rods which are parallel to each other are connected between the two support rods, the length direction of each cross rod is parallel to the horizontal direction, each cross rod is provided with a first limiting block, the first limiting blocks are arranged at intervals in the vertical direction, and the vertical polish rods slide between the first limiting blocks vertically;

the pedal is positioned at the front end of the top of the bottom plate, the vertical polished rod is positioned above the rear end of the top of the bottom plate, the first connecting rod is horizontally hinged above the middle of the bottom plate, strip-shaped transition holes penetrating through the rod body are respectively formed in the side walls of two ends of the first connecting rod, and the upper end of the pedal and the lower end of the vertical polished rod are respectively hinged in the two strip-shaped transition holes;

a second limiting block is arranged above the top plate, the horizontal polished rod horizontally slides in the second limiting block, and two ends of the second connecting rod are respectively hinged to the upper end of the vertical polished rod and one end of the horizontal polished rod close to the vertical polished rod;

one end, far away from the vertical polished rod, of the horizontal polished rod is connected with a first moving block, the top of the first cover and the top of the second cover shell are respectively connected with a second moving block and a third moving block, two ends of the third connecting rod are respectively hinged to the first moving block and the second moving block, and two ends of the fourth connecting rod are respectively hinged to the first moving block and the third moving block.

By adopting the technical scheme, when the grinding wheel needs to be replaced, the pedal is firstly stepped down to enable the pedal to descend in the lifting cavity, the pedal drives the first connecting rod to swing in a hinged mode in the process, the first connecting rod enables the vertical polished rod to slide upwards, the vertical polished rod drives the horizontal polished rod to slide horizontally through the second connecting rod and drives one end of the horizontal polished rod to be close to the upper portion of the protective cover, the horizontal polished rod enables the first moving block to be close to the second moving block and the third moving block, the first moving block drives the second moving block and the third moving block through the third connecting rod and the fourth connecting rod respectively to enable the first cover and the second cover to be far away from each other, so that the grinding wheel between the first cover and the second cover is replaced quickly, after the grinding wheel is replaced, the pedal is loosened, the pedal rises under the action of the reset spring, and finally the first cover and the second cover are close to, through the structure and the process, the convenience of grinding the propeller blade of the propeller can be improved.

Preferably, the bottom of the first housing is connected with a first horizontal sliding block, the bottom of the second housing is connected with a second horizontal sliding block, and the top of the top plate is provided with a first horizontal sliding groove for the first horizontal sliding block to slide and a second horizontal sliding groove for the second horizontal sliding block to slide;

two relative lateral walls of roof have penetrated first guide bar and second guide bar respectively, the length direction of first guide bar with the length direction of first horizontal spout is parallel, the length direction of second guide bar with the length direction of second horizontal spout is parallel, first guide bar penetrates in the first horizontal spout and passes first horizontal slider, the second guide bar passes second horizontal spout and passes second horizontal slider.

Through adopting above-mentioned technical scheme, through the slip of first horizontal slider at first horizontal spout and the slip of second horizontal slider at second horizontal spout for first housing and second housing horizontal slip respectively in the top of roof, and, at the in-process that slides, first guide bar and second guide bar can lead first horizontal slider and second horizontal slider respectively, thereby make first housing and second housing stably slide.

Preferably, two opposite side walls of the pedal are respectively connected with a vertical sliding block, two opposite inner walls of the lifting cavity are respectively provided with a vertical sliding groove, and the two vertical sliding blocks respectively slide in the two vertical sliding grooves.

Through adopting above-mentioned technical scheme, through the slip of vertical slider in vertical spout for the footboard is in the lift intracavity stable lift.

Preferably, be provided with the montant in the vertical chute, the lower extreme of montant connect in the bottom of vertical chute, stretch out the upper end of montant set up the notch at vertical chute top, vertical slider has seted up the confession the vertical hole that the montant passed, the external screw thread has been seted up to the upper end lateral wall of montant, the upper end lateral wall threaded connection of montant has the anticreep piece.

Through adopting above-mentioned technical scheme, behind the lateral wall of montant upper end, the anticreep piece can play the anticreep guard action to the footboard.

Preferably, a protrusion is arranged at the bottom of the lifting cavity, and the pedal can be abutted against the top of the protrusion in the descending process.

Through adopting above-mentioned technical scheme, at footboard pressurized decline in-process, after the footboard contacted with the top of lug, can avoid reset spring excessive compression to play the guard action to reset spring.

Preferably, the conveying structure comprises a rotating shaft, a first belt wheel, a second belt wheel and a belt, the first belt wheel is coaxially connected to the end portion of the output shaft of the motor, the rotating shaft horizontally rotates above the top plate, one end of the rotating shaft is coaxially connected with the grinding wheel, the other end of the rotating shaft is coaxially connected with the second belt wheel, the belt is tensioned between the first belt wheel and the second belt wheel, and the top plate is provided with a hole for the belt to pass through.

By adopting the technical scheme, when the motor works, the motor drives the first belt wheel to rotate, the first belt wheel drives the second belt wheel to rotate through the belt, and the second belt drives the grinding wheel to rotate through the rotating shaft, so that the transmission process of the motor to the grinding wheel is realized.

In summary, the present application includes at least one of the following beneficial technical effects:

after the defects of the blades of the propeller are inspected, firstly, the damaged parts of the blades of the propeller are welded, then the blades of the propeller are corrected in a blade bending mode, finally, the blades of the propeller are subjected to surface grinding to complete the maintenance of the marine propeller, and in the blade maintenance process of the propeller, the first housing and the second housing of the protective cover can be separated by stepping on the pedal, so that the coarse grinding wheel, the fine grinding wheel and the cloth grinding wheel can be replaced conveniently, and the convenience in grinding the blades of the propeller is improved.

Drawings

Fig. 1 is an overall schematic view of a hull in the background art;

FIG. 2 is a general schematic view of a propeller of the prior art;

FIG. 3 is a front side schematic view of a grinder in an embodiment of the present application;

FIG. 4 is a schematic view of a portion of the structure of FIG. 3;

FIG. 5 is a sectional view showing the structure of the step plate and the lift chamber in the embodiment of the present application;

FIG. 6 is a rear side schematic view of a grinder in an embodiment of the present application;

fig. 7 is a partial structural schematic view of fig. 6.

Description of reference numerals: 1. a base; 11. a top plate; 12. a middle plate; 13. a base plate; 14. a support bar; 21. a grinding wheel; 211. a rotating shaft; 22. an electric motor; 31. a first pulley; 32. a second pulley; 33. a belt; 4. a protective cover; 41. a first housing; 42. a second housing; 51. a pedal; 52. a vertical polish rod; 53. a horizontal polish rod; 54. a first moving block; 55. a second moving block; 56. a third moving block; 61. a first link; 611. a strip-shaped transition hole; 62. a second link; 63. a third link; 64. a fourth link; 71. a lifting cavity; 72. a return spring; 73. a vertical slide block; 74. a vertical chute; 75. a vertical rod; 76. an anti-drop block; 77. a bump; 81. a first stopper; 811. a cross bar; 82. a second limiting block; 91. a first horizontal slider; 92. a second horizontal slider; 93. a first horizontal chute; 94. a second horizontal chute; 95. a first guide bar; 96. a second guide bar.

Detailed Description

The present application is described in further detail below with reference to figures 3-7.

In a first aspect, the embodiment of the application discloses a grinder for repairing a marine propeller. Referring to fig. 3 and 4, the grinder for repairing the marine propeller includes a base 1, a grinding wheel 21, a motor 22, a protective cover 4, and a protective cover control structure, wherein the base 1 is a frame of the grinder for mounting the grinding wheel 21, the motor 22, the protective cover 4, and the protective cover control structure, the grinding wheel 21 is used for grinding a blade of the propeller, the motor 22 is used for driving the grinding wheel 21, the protective cover 4 is used for protecting a worker during a grinding process, and the protective cover control structure is used for controlling a state of the protective cover 4.

Referring to fig. 3, the base 1 includes a top plate 11, a middle plate 12, and a bottom plate 13 arranged from top to bottom, the top plate 11, the middle plate 12, and the bottom plate 13 are all in a rectangular plate shape, the top plate 11, the middle plate 12, and the bottom plate 13 are all horizontally disposed, wherein the thickness of the bottom plate 13 is thicker than the thickness of the top plate 11 and the middle plate 12, and the length and width of the bottom plate 13 is larger than the length and width of the top plate 11 and the middle plate 12. Fixedly connected with bracing piece 14 between the bottom of roof 11, intermediate lamella 12 corner position and the top of bottom plate 13, bracing piece 14 is rectangular rod-shaped, and the length direction of bracing piece 14 is parallel with vertical direction, and in this embodiment, the quantity of bracing piece 14 is four, and four corner positions at intermediate lamella 12 are fixed connection respectively in the middle part of bracing piece 14.

Referring to fig. 3 and 4, the grinding wheel 21 is horizontally and rotatably disposed on the top of the top plate 11, that is, the rotation axis 211 of the grinding wheel 21 is parallel to the horizontal direction, and the grinding wheel 21 may be a coarse grinding wheel, a fine grinding wheel or a grinding wheel arranged thereon, which is selected according to the grinding process of the blades of the marine propeller. Further, the top of roof 11 has seted up the wheel hole, and the wheel hole is the rectangular hole, and the length direction in wheel hole both is parallel with the horizontal direction, also is parallel with the diameter direction of emery wheel 21, and the wheel hole supplies the lower part embedding of emery wheel 21 to make emery wheel 21 rotate at the top level of roof 11. The motor 22 is fixedly arranged at the top of the middle plate 12, a transmission structure is connected between the motor 22 and the grinding wheel 21, and when the grinding machine is used for grinding the surface of the blade of the propeller, the motor 22 drives the grinding wheel 21 to rotate through the transmission structure so as to grind.

Referring to fig. 4, the shield 4 includes a first housing 41 and a second housing 42, the first housing 41 and the second housing 42 are arranged along an axial direction of the grinding wheel 21, the first housing 41 and the second housing 42 are both slid on top of the top plate 11, the sliding directions of the first housing 41 and the second housing 42 are both parallel to the axial direction of the grinding wheel 21, so that the first housing 41 and the second housing 42 can be moved closer to or away from each other by the sliding, and the shield control structure controls the first housing 41 and the second housing 42 to be moved closer to or away from each other. When the grinding wheel 21 needs to be replaced, the first housing 41 and the second housing 42 of the protective cover 4 can be quickly close to or far away from each other by utilizing the protective cover control structure, so that the grinding wheel 21 is convenient to replace, and the convenience of grinding the propeller blades of the propeller is improved.

Referring to fig. 3 and 4, the shield control structure includes a pedal 51, a vertical polished rod 52, a horizontal polished rod 53, a first link 61, a second link 62, a third link 63, and a fourth link 64. Specifically, referring to fig. 3 and 5, a lifting cavity 71 is formed downward at the top of the bottom plate 13, the lifting cavity 71 is a rectangular cavity, in this embodiment, the length direction of the lifting cavity 71 is parallel to the axial direction of the grinding wheel 21, and the width direction of the lifting cavity 71 is perpendicular to the axial direction of the grinding wheel 21. The pedal 51 vertically slides in the lifting cavity 71, the shape of the pedal 51 corresponding to the lifting cavity 71 is rectangular plate-shaped, and the length and width of the pedal 51 are equal to the length and width of the lifting cavity 71, so that after the pedal 51 is placed in the lifting cavity 71, the side wall of the pedal 51 can be attached to the inner wall of the lifting cavity 71. A return spring 72 is connected between the bottom of the pedal 51 and the bottom of the lifting cavity 71, the return spring 72 keeps the pedal 51 moving in the lifting cavity 71, when the pedal 51 is pressed down, the pedal 51 compresses the return spring 72, and when the external force of the pressed pedal 51 is removed, the pedal 51 is returned to the initial height under the action of the return spring 72.

Referring to fig. 6, two parallel cross bars 811 are connected between the two support rods 14 far from the pedal 51, the cross bars 811 are in the shape of rectangular rods, the length direction of the cross bars 811 is parallel to the horizontal direction, and in the embodiment, the two cross bars 811 are respectively located below the top plate 11 and below the middle plate 12. The first limiting blocks 81 are arranged on the surface of each cross bar 811 departing from the pedal 51, the first limiting blocks 81 are rectangular blocks, and the first limiting blocks 81 are located in the middle of the cross bar 811, so that the two first limiting blocks 81 are arranged at intervals in the vertical direction. The two first limiting blocks 81 are provided with first polish rod holes vertically penetrating through the two first limiting blocks 81, and the vertical polish rod 52 vertically slides between the two first limiting blocks 81 after sequentially penetrating through the first polish rod holes of the upper and lower first limiting blocks 81.

Referring to fig. 3 and 4, in the present embodiment, with the horizontal direction of the exposed circumferential side wall of the grinding wheel 21 as the front, the pedal 51 is located at the front end of the top of the bottom plate 13, and the vertical polish rod 52 is located above the rear end of the top of the bottom plate 13.

Referring to fig. 3 and 4, the first link 61 is horizontally hinged above the middle of the base plate 13, i.e., the rotation axis 211 line of the first link 61 is parallel to the horizontal direction, and the rotation axis 211 line of the first link 61 is parallel to the left and right end directions of the base plate 13. The side walls of the two ends of the first connecting rod 61 are respectively provided with a strip-shaped transition hole 611 penetrating through the rod body, the strip-shaped transition holes 611 penetrate through the side walls of the first connecting rod 61 along the horizontal direction, the upper end of the pedal 51 and the lower end of the vertical polished rod 52 are respectively hinged in the two strip-shaped transition holes 611, when the pedal 51 rises, the vertical polished rod 52 falls, and when the pedal 51 falls, the vertical polished rod 52 rises, so that linkage between the pedal 51 and the vertical polished rod 52 is realized.

Referring to fig. 3 and 4, a second limiting block 82 is disposed above the top plate 11, the second limiting block 82 is rectangular, the length direction of the second limiting block 82 is parallel to the vertical direction, and the width direction is parallel to the horizontal direction. The side wall of the upper end of the second limiting block 82 is provided with a second polished rod hole which horizontally penetrates through the second limiting block 82, and the horizontal polished rod 53 penetrates through the second polished rod hole, so that the horizontal polished rod 53 horizontally slides in the second limiting block 82. Furthermore, two ends of the second connecting rod 62 are respectively hinged to the upper end of the vertical polish rod 52 and one end of the horizontal polish rod 53 close to the vertical polish rod 52, when the vertical polish rod 52 rises, the horizontal polish rod 53 moves and is close to the upper part of the protective cover 4, and when the vertical polish rod 52 descends, the horizontal polish rod 53 moves and is far away from the upper part of the protective cover 4, so that linkage between the vertical polish rod 52 and the horizontal polish rod 53 is realized.

Referring to fig. 3 and 4, a first moving block 54 is fixedly connected to one end of the horizontal polished rod 53 away from the vertical polished rod 52, the first moving block 54 is rectangular block-shaped, a second moving block 55 and a third moving block 56 are fixedly connected to the top of the first housing 41 and the top of the second housing 42 respectively, the upper portions of the second moving block 55 and the third moving block 56 are rectangular block-shaped, and the bottoms of the lower portions are attached to the tops of the first housing 41 and the second housing 42 respectively. Further, both ends of the third connecting rod 63 are respectively hinged to the first moving block 54 and the second moving block 55, and both ends of the fourth connecting rod 64 are respectively hinged to the first moving block 54 and the third moving block 56. When the first moving block 54 is close to the second moving block 55 and the third moving block 56, the first moving block 54 makes the second moving block 55 and the third moving block 56 move through the third connecting rod 63 and the fourth connecting rod 64, because the second moving block 55 and the third moving block 56 are respectively and fixedly connected with the first housing 41 and the second housing 42, and the first housing 41 and the second housing 42 horizontally slide, the second moving block 55 and the third moving block 56 respectively drive the first housing 41 and the second housing 42 to slide and be away from each other, and similarly, when the first moving block 54 is away from the second moving block 55 and the third moving block 56, the second moving block 55 and the third moving block 56 respectively drive the first housing and the second housing 42 to slide and be close to each other.

Referring to fig. 3 and 4, when the grinding wheel 21 needs to be replaced, the pedal 51 is firstly stepped on, so that the pedal 51 descends in the lifting cavity 71, the pedal 51 drives the first connecting rod 61 to swing in a hinged manner, the first connecting rod 61 enables the vertical polished rod 52 to slide upwards, the vertical polished rod 52 drives the horizontal polished rod 53 to slide horizontally through the second connecting rod 62 and drives one end of the horizontal polished rod 53 to be close to the upper part of the protection cover 4, the horizontal polished rod 53 enables the first moving block 54 to be close to the second moving block 55 and the third moving block 56, the first moving block 54 drives the second moving block 55 and the third moving block 56 through the third connecting rod 63 and the fourth connecting rod 64 respectively, so that the first cover 41 and the second cover 42 are far away from each other, and the grinding wheel 21 between the first cover 41 and the second cover 42 is rapidly replaced. Referring to fig. 4 and 5, after the grinding wheel 21 is replaced, the pedal 51 is released, and the pedal 51 is lifted under the action of the return spring 72, so that the first housing 41 and the second housing 42 are finally closed to cover the grinding wheel 21 again.

Referring to fig. 4 and 7, a first horizontal slider 91 is attached to the bottom of the first housing 41, the first horizontal slider 91 has a rectangular block shape, a second horizontal slider 92 is attached to the bottom of the second housing 42, the second horizontal slider 92 has a rectangular block shape, in addition, the top of the top plate 11 is provided with a first horizontal sliding groove 93 for the first horizontal sliding block 91 to slide and a second horizontal sliding groove 94 for the second horizontal sliding block 92 to slide, the first horizontal sliding groove 93 is a rectangular groove corresponding to the first horizontal sliding block 91, the second horizontal sliding groove 94 is a rectangular groove corresponding to the second horizontal sliding block 92, so that the first horizontal sliding block 91 and the second horizontal sliding block 92 respectively slide on the first horizontal sliding groove 93 and the second horizontal sliding groove 94, by the sliding movement of the first horizontal sliding block 91 in the first horizontal sliding groove 93 and the sliding movement of the second horizontal sliding block 92 in the second horizontal sliding groove 94, so that the first closure 41 and the second closure 42 horizontally slide on the top of the top plate 11, respectively.

Referring to fig. 4 and 7, a first guide rod 95 and a second guide rod 96 penetrate through two opposite side walls of the top plate 11, and in the present embodiment, the first guide rod 95 and the second guide rod 96 are each in the shape of a rectangular bar. The length direction of the first guide rod 95 is parallel to the length direction of the first horizontal sliding groove 93, the length direction of the second guide rod 96 is parallel to the length direction of the second horizontal sliding groove 94, the first guide rod 95 penetrates into the first horizontal sliding groove 93 from the side wall of the top plate 11 and penetrates through the first horizontal sliding block 91, the second guide rod 96 penetrates through the second horizontal sliding groove 94 from the other side wall of the top plate 11 and penetrates through the second horizontal sliding block 92, at this time, in the sliding process of the first housing 41 and the second housing 42, the first guide rod 95 and the second guide rod 96 can respectively guide the first horizontal sliding block 91 and the second horizontal sliding block 92, and therefore the first housing 41 and the second housing 42 can stably slide.

Referring to fig. 5, two opposite side walls of the pedal 51 are fixedly connected with vertical sliders 73 respectively, specifically, the vertical sliders 73 are rectangular blocks, and the two vertical sliders are fixedly connected to the long-side inner walls of the two sides of the pedal 51 respectively. Correspondingly, vertical sliding grooves 74 have been seted up respectively to two relative long limit inner walls of lift chamber 71, and vertical sliding grooves 74 is the rectangular channel, and two vertical sliders 73 slide respectively in two vertical sliding grooves 74, and at this moment, through the sliding of vertical slider 73 in vertical sliding grooves 74 for footboard 51 stably goes up and down in lift chamber 71.

Further, referring to fig. 5, a vertical rod 75 is fixedly arranged in the vertical sliding groove 74, the vertical rod 75 is in a shape of a round bar, the axis direction of the vertical rod 75 is parallel to the vertical direction, the lower end of the vertical rod 75 is fixedly connected to the bottom of the vertical sliding groove 74, and the upper end of the vertical rod 75 extends out of a notch at the top of the vertical sliding groove 74. Correspondingly, the vertical slider 73 is provided with a vertical hole for the vertical rod 75 to pass through, and the vertical hole is a round hole corresponding to the vertical rod. The external screw thread has been seted up to the upper end lateral wall of montant 75, and the upper end lateral wall threaded connection of montant 75 has anticreep piece 76, and anticreep piece 76 threaded connection is behind the lateral wall of montant 75 upper end, and anticreep piece 76 can play the anticreep guard action to footboard 51.

Referring to fig. 5, the protrusion 77 is disposed at the bottom of the lifting cavity 71, the protrusion 77 is rectangular, and the bottom of the pedal 51 can abut against the top of the protrusion 77 during the descending process of the pedal 51, so that after the pedal 51 contacts with the top of the protrusion 77, the return spring 72 can be prevented from being excessively compressed, thereby protecting the return spring 72.

Referring to fig. 3 and 4, the conveying structure includes a rotating shaft 211, a first belt pulley 31, a second belt pulley 32 and a belt 33, the first belt pulley 31 is coaxially connected to an end portion of an output shaft of the motor 22, that is, an axis of the first belt pulley 31 is collinear with an axis of the output shaft of the motor 22, the rotating shaft 211 horizontally rotates above the top plate 11, that is, the axis of the rotating shaft 211 is parallel to a horizontal direction, one end of the rotating shaft 211 is coaxially connected with the grinding wheel 21 and the other end is coaxially connected with the second belt pulley 32, the belt 33 is tensioned between the first belt pulley 31 and the second belt pulley 32, the top plate 11 is provided with a hole for the belt 33 to pass through, when the motor 22 works, the motor 22 drives the first belt pulley 31 to rotate, the first belt pulley 31 drives the second belt pulley 32 to rotate through the belt 33, and the second belt drives the grinding wheel 21 to rotate through.

In a second aspect, the embodiment of the application also discloses a maintenance process of the marine propeller. Referring to fig. 3 and 4, the maintenance process of the marine propeller includes the steps of:

s1: inspecting the damaged part of the propeller to obtain the defects of each part;

s2: welding repair is carried out on the damaged part of the propeller;

s3: straightening the blade bending of a blade of the propeller;

s4: grinding the surface of the blade of the propeller by using a grinder;

s41: treading the pedal 51, installing a coarse grinding wheel sheet at the end part of the rotating shaft 211 between the first encloser 41 and the second encloser 42, standing at a position outside the pedal 51, and performing coarse grinding on the propeller blades of the propeller by using the coarse grinding wheel sheet;

s42: after coarse grinding is finished, the pedal 51 is stepped on, the coarse grinding wheel is taken down, the fine grinding wheel is installed at the end part of the rotating shaft 211 between the first encloser 41 and the second encloser 42, then the position outside the pedal 51 is stood, and the fine grinding wheel is used for fine grinding of the propeller blades of the propeller;

s43: after finishing the fine grinding, the pedal 51 is stepped on, the fine grinding wheel is taken down, the cloth grinding wheel is installed at the end of the rotating shaft 211 between the first cover 41 and the second cover 42, and then the pedal 51 is stood at a position outside, and the blades of the propeller are polished by the cloth grinding wheel.

The implementation principle of the maintenance process of the marine propeller provided by the embodiment of the application is as follows: after the defects of the propeller blades are detected, firstly, the damaged parts of the propeller blades of the propeller are welded, then the propeller blades of the propeller are corrected in a bent mode, finally, the propeller blades of the propeller are subjected to surface grinding to complete the maintenance of the marine propeller, and in the propeller maintenance process of the propeller, the first housing 41 and the second housing 42 of the protective cover 4 can be separated by stepping on the pedal 51, so that the coarse grinding wheel, the fine grinding wheel and the cloth grinding wheel can be replaced conveniently, and the convenience in grinding the propeller blades of the propeller is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A maintenance process of a marine propeller is characterized by comprising the following steps:

s1: inspecting the damaged part of the propeller to obtain the defects of each part;

s2: welding repair is carried out on the damaged part of the propeller;

s3: straightening the blade bending of a blade of the propeller;

s4: grinding the surface of the blade of the propeller by using a grinder;

s41: treading a pedal (51), installing a coarse grinding wheel sheet at the end part of a rotating shaft (211) between a first housing (41) and a second housing (42), standing at a position outside the pedal (51), and performing coarse grinding on the propeller blades of the propeller by using the coarse grinding wheel sheet;

s42: after coarse grinding is finished, a pedal (51) is stepped, a coarse grinding wheel is taken down, a fine grinding wheel is installed at the end part of a rotating shaft (211) between a first encloser (41) and a second encloser (42), then the coarse grinding wheel stands outside the pedal (51), and fine grinding wheels are used for fine grinding of blades of the propeller;

s43: after finishing the fine grinding, the pedal (51) is stepped, the fine grinding wheel is taken down, the cloth grinding wheel is installed at the end part of the rotating shaft (211) between the first cover shell (41) and the second cover shell (42), then the rotating shaft stands outside the pedal (51), and the blades of the propeller are polished by the cloth grinding wheel.

2. The utility model provides a grinder is used in marine screw maintenance which characterized in that: the grinding wheel protection device comprises a base (1), a grinding wheel (21), a motor (22), a protection cover (4) and a protection cover control structure, wherein the base (1) comprises a top plate (11), a middle plate (12) and a bottom plate (13) which are arranged from top to bottom, and a support rod (14) is connected among the top plate (11), the middle plate (12) and the bottom plate (13);

the grinding wheel (21) is horizontally and rotatably arranged at the top of the top plate (11), the motor (22) is arranged at the top of the middle plate (12), a conveying structure is connected between the motor (22) and the grinding wheel (21), and the motor (22) drives the grinding wheel (21) to rotate through the conveying structure;

the protective cover (4) comprises a first cover casing (41) and a second cover casing (42), the first cover casing (41) and the second cover casing (42) are respectively slid on the top of the top plate (11), and the first cover casing (41) and the second cover casing (42) can be close to or far away from each other through sliding;

the hood control structure controls the first hood casing (41) and the second hood casing (42) to approach or move away from each other.

3. The grinder for repairing the marine propeller as claimed in claim 2, wherein: the protective cover control structure comprises a pedal (51), a vertical polished rod (52), a horizontal polished rod (53), a first connecting rod (61), a second connecting rod (62), a third connecting rod (63) and a fourth connecting rod (64);

a lifting cavity (71) is formed in the top of the bottom plate (13) downwards, the pedal (51) vertically slides in the lifting cavity (71), a return spring (72) is connected between the bottom of the pedal (51) and the bottom of the lifting cavity (71), a plurality of cross rods (811) which are parallel to each other are connected between the two support rods (14), the length direction of each cross rod (811) is parallel to the horizontal direction, each cross rod (811) is provided with a first limiting block (81), the first limiting blocks (81) are arranged at intervals in the vertical direction, and the vertical polish rod (52) vertically slides between the first limiting blocks (81);

the pedal (51) is positioned at the front end of the top of the bottom plate (13), the vertical polished rod (52) is positioned above the rear end of the top of the bottom plate (13), the first connecting rod (61) is horizontally hinged above the middle of the bottom plate (13), strip-shaped transition holes (611) penetrating through the rod body are respectively formed in the side walls of the two ends of the first connecting rod (61), and the upper end of the pedal (51) and the lower end of the vertical polished rod (52) are respectively hinged in the two strip-shaped transition holes (611);

a second limiting block (82) is arranged above the top plate (11), the horizontal polished rod (53) horizontally slides in the second limiting block (82), and two ends of the second connecting rod (62) are respectively hinged to the upper end of the vertical polished rod (52) and one end of the horizontal polished rod (53) close to the vertical polished rod (52);

one end, far away from the vertical polish rod (52), of the horizontal polish rod (53) is connected with a first moving block (54), the top of the first housing (41) and the top of the second housing (42) are respectively connected with a second moving block (55) and a third moving block (56), two ends of the third connecting rod (63) are respectively hinged to the first moving block (54) and the second moving block (55), and two ends of the fourth connecting rod (64) are respectively hinged to the first moving block (54) and the third moving block (56).

4. The grinder for repairing the marine propeller according to claim 3, wherein: the bottom of the first cover shell (41) is connected with a first horizontal sliding block (91), the bottom of the second cover shell (42) is connected with a second horizontal sliding block (92), and the top of the top plate (11) is provided with a first horizontal sliding groove (93) for the first horizontal sliding block (91) to slide and a second horizontal sliding groove (94) for the second horizontal sliding block (92) to slide;

two opposite side walls of the top plate (11) are respectively penetrated with a first guide rod (95) and a second guide rod (96), the length direction of the first guide rod (95) is parallel to the length direction of the first horizontal sliding groove (93), the length direction of the second guide rod (96) is parallel to the length direction of the second horizontal sliding groove (94), the first guide rod (95) penetrates into the first horizontal sliding groove (93) and penetrates through the first horizontal sliding block (91), and the second guide rod (96) penetrates through the second horizontal sliding groove (94) and penetrates through the second horizontal sliding block (92).

5. The grinder for repairing the marine propeller according to claim 4, wherein: two opposite side walls of the pedal (51) are respectively connected with a vertical sliding block (73), two opposite inner walls of the lifting cavity (71) are respectively provided with a vertical sliding groove (74), and the two vertical sliding blocks (73) respectively slide in the two vertical sliding grooves (74).

6. The grinder for repairing the marine propeller according to claim 5, wherein: be provided with montant (75) in vertical spout (74), the lower extreme of montant (75) connect in the bottom of vertical spout (74), stretch out the upper end of montant (75) set up the notch at vertical spout (74) top, the confession has been seted up in vertical slider (73) the vertical hole that montant (75) passed, the external screw thread has been seted up to the upper end lateral wall of montant (75), the upper end lateral wall threaded connection of montant (75) has anticreep piece (76).

7. The grinder for repairing the marine propeller according to claim 6, wherein: the bottom of the lifting cavity (71) is provided with a bump (77), and the pedal (51) can be abutted against the top of the bump (77) in the descending process.

8. The grinder for repairing the marine propeller according to claim 7, wherein: the conveying structure comprises a rotating shaft (211), a first belt wheel (31), a second belt wheel (32) and a belt (33), wherein the first belt wheel (31) is coaxially connected to the end part of an output shaft of the motor (22), the rotating shaft (211) horizontally rotates above the top plate (11), one end of the rotating shaft (211) is coaxially connected with the grinding wheel (21) and the other end of the rotating shaft is coaxially connected with the second belt wheel (32), the belt (33) is tensioned between the first belt wheel (31) and the second belt wheel (32), and a hole for the belt (33) to pass through is formed in the top plate (11).

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