CN110834710A

CN110834710A - Protective cover

Info

Publication number: CN110834710A
Application number: CN201911009035.0A
Authority: CN
Inventors: 黄浩文; 何超平; 饶武江; 杨阳; 胡沙; 李奕城
Original assignee: Guangzhou Wenchong Shipyard Co Ltd
Current assignee: Guangzhou Wenchong Shipyard Co Ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-02-25

Abstract

The invention discloses a protective cover, wherein a measuring hole is formed in the protective cover, a hole cover is detachably connected to the measuring hole in the protective cover, the hole cover is attached to the protective cover, the attaching surface of the hole cover and the protective cover is a curved surface, and the hole cover is made of metal materials. The protective cover can prevent sundries or entanglement in water from entering the shaft seal through the measuring hole under the condition that the use of the measuring hole is not influenced.

Description

Protective cover

Technical Field

The invention relates to the field of shaft seal protective covers of propeller shafts of ships, in particular to a protective cover.

Background

The shaft seal of the tail shaft tube is a key part of a shaft assembly, and shaft seal parts are arranged at the tail end and the front end of the tail shaft tube. For the tail shaft seal, the function is to prevent the lubricating oil in the tail shaft pipe from overflowing, and simultaneously prevent the seawater from entering the stern cavity to cause serious potential safety hazards such as lubricating oil emulsification, oil film failure, bearing burning and the like. One end of the protective cover is connected with a stern post or is attached to a rear flange of a stern tube, the other end of the protective cover is provided with a fishing net cutter with the requirement of clearance distance with a propeller hub, and the protective cover is usually designed in a three-section mode. Because classification society has the requirement to bearing sinking volume measurement, the sinking volume needs to be obtained through the measuring of the chi that sinks on the bearing seal, so the measuring hole is opened in the top of the chi that sinks of bearing seal, usually opens the interlude at the protection casing to the staff can operate the chi that sinks and carry out the sinking volume measurement work through the measuring hole to the inspection judges the wearing and tearing situation of tailshaft bearing.

Due to the existence of the measuring hole, under the environment that the seawater is complicated and changeable, sundries in the seawater easily enter through the measuring hole and damage the tail shaft seal, and besides, a winding object after the fishing net cutting knife cuts the fishing net easily enters into the shaft seal cavity through the measuring hole to cause the failure of the sealing performance of the shaft seal. Therefore, a scheme for reducing damage to the shaft seal under the condition of meeting the underwater detection of the classification society is needed.

Disclosure of Invention

In order to solve the above problems, it is an object of the present invention to provide a shield which can prevent foreign materials or entanglement in water from entering the shaft seal through the measuring hole without affecting the use of the measuring hole.

Based on the protection cover, the protection cover is annular, the protection cover is provided with a measuring hole, the measuring hole on the protection cover is detachably connected with a hole cover, the hole cover is attached to the protection cover, the attaching surface of the hole cover and the protection cover is a curved surface, and the hole cover is made of metal materials.

Further, the hole cover is connected with the protective cover through screws.

Furthermore, the hole cover is approximately square, through holes are formed in four corners of the hole cover, threaded holes are formed in positions, corresponding to the through holes, of the protective cover, and the screws penetrate through the through holes and are in threaded connection with the threaded holes.

Further, the screw is coated with anti-loose glue.

Further, the head of the screw is provided with a locking steel wire.

Further, the hole cover is coated with an anticorrosive paint.

Further, the thickness of the hole cover is 10 mm.

The invention has the beneficial effects that: by arranging the detachable hole cover, the hole cover can be detached to facilitate measurement when the measuring hole is needed; cover the measuring aperture through the handhole door when not needing to use the measuring aperture, alright so with prevent that aquatic debris or winding from getting into the bearing seal chamber of protection casing and damaging the bearing seal, in addition, the handhole door has improved the cover effect to the measuring aperture with the protection casing laminating, further avoided aquatic debris or winding to get into the bearing seal chamber of protection casing and damage the bearing seal.

Drawings

FIG. 1 is a schematic view of a protective cover of the present invention;

FIG. 2 is a sectional view taken along line A of FIG. 1, with the screw shown in phantom;

FIG. 3 is a schematic view of the hole cover, screw and anti-loosening steel wire of the present invention;

fig. 4 is a schematic view of the engagement of the hole cover with the protection cover at the hole cover in the present invention.

Wherein, 1, a protective cover; 2. an orifice cover; 3. a screw; 4. a locking steel wire; 5. and (6) measuring the hole.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

As shown in fig. 1 to 4, the protective cover according to the embodiment of the present invention is shown, a measuring hole 5 is formed in the protective cover 1, a hole cover 2 is detachably connected to the measuring hole 5 of the protective cover 1, the hole cover 2 is attached to the protective cover 1, an attachment surface of the hole cover 2 and the protective cover 1 is a curved surface, and the hole cover 2 is made of a metal material. The shield 1 has a circular ring shape. The protective cover 1 and the hole cover 2 are made of class A plate materials of classification society of ships.

By arranging the detachable hole cover 2, the hole cover 2 can be detached to facilitate measurement when the measuring hole 5 is needed; cover measuring aperture 5 through handhole door 2 when need not using measuring aperture 5, alright so can prevent that aquatic debris or winding from getting into the bearing seal chamber damage bearing seal of protection casing 1, in addition, handhole door 2 and the laminating of protection casing 1 have improved the cover effect to measuring aperture 5, further avoid aquatic debris or winding to get into the bearing seal chamber damage bearing seal of protection casing 1.

Preferably, the hole cover 2 is connected to the protection cover 1 by means of screws 3. Specifically, the hole cover 2 is approximately square, through holes are formed in four corners of the hole cover 2, threaded holes are formed in positions, corresponding to the through holes, of the protective cover 1, and the screws 3 penetrate through the through holes and are in threaded connection with the threaded holes. During installation, the hole cover 2 needs to be drilled and reamed in advance, and then a threaded hole is formed in the protective cover 1 in the installation process in a matched drilling and tapping mode with the protective cover 1, so that the installation precision of the screw 3 can be guaranteed, and the situation that the through hole and the threaded hole are staggered during installation is avoided; the screw 3 can be made of stainless steel A4-70, so that corrosion in seawater can be effectively avoided. Through holes are formed in four corners of the hole cover 2, the hole cover 2 can be effectively positioned, and the displacement is avoided.

Preferably, the screw 3 is coated with a locking glue. Specifically, during operation, the screw 3 is screwed down after being coated with loctite anti-loose glue.

Preferably, the head of the screw 3 is provided with a locking wire 4, so that the screw 3 can be prevented from loosening and falling off in seawater, and the falling off of the hole cover 2 can be avoided. Specifically, the lock wire 4 is a stainless steel SUS316 lock wire 4.

Preferably, the orifice cover 2 is coated with a corrosion resistant paint. This avoids corrosion of the cover 2 by seawater.

Preferably, the thickness of the orifice cover 2 is 10 mm.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a protective cover, the protective cover is the ring form, the measuring aperture has been seted up on the protective cover, its characterized in that, measuring aperture department on the protective cover can be dismantled and be connected with the handhole door, the handhole door with the protective cover laminating, the handhole door with the binding face of protective cover is the curved surface, the handhole door adopts the metal material to make.

2. The shield of claim 1, wherein the orifice cover is attached to the shield by screws.

3. The shield according to claim 2, wherein the hole cover is substantially square, and has through holes formed at four corners thereof, and the shield has screw holes formed therein corresponding to the through holes, the screws passing through the through holes and being screwed into the screw holes.

4. The shield of claim 3 wherein said screw is coated with anti-loosening glue.

5. The shield cap according to claim 3 or 4, wherein the head of the screw is provided with a retaining wire.

6. The shield of claim 1 wherein said escutcheon is coated with a corrosion resistant paint.

7. The shield of claim 1 wherein the thickness of the orifice cover is 10 mm.