CN113602448A - Epoxy casting self-sealing method for small stern tube - Google Patents
Epoxy casting self-sealing method for small stern tube Download PDFInfo
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- CN113602448A CN113602448A CN202110994328.XA CN202110994328A CN113602448A CN 113602448 A CN113602448 A CN 113602448A CN 202110994328 A CN202110994328 A CN 202110994328A CN 113602448 A CN113602448 A CN 113602448A
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- stern
- epoxy
- stern tube
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- sealing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/50—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by forming methods, e.g. manufacturing of curved blocks
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- Ocean & Marine Engineering (AREA)
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- Sealing Devices (AREA)
Abstract
The invention discloses an epoxy casting self-sealing method for a small stern tube, which is characterized in that when a stern tube and a stern post steel casting are assembled, the sealing and plugging operation of the front end of the stern post steel casting is finished by directly utilizing the mutual matching of a convex shoulder, a rubber sealing ring and a pressing retaining ring, and the structure is not required to be dismantled subsequently, so that the operation difficulty of constructors in a narrow space can be reduced, the shafting installation period is shortened, the epoxy consumption is reduced, and the epoxy casting reliability is also improved.
Description
Technical Field
The invention belongs to the technical field of ship construction, and particularly relates to a small stern tube epoxy casting self-sealing method.
Background
In the ship building process, the installation of the whole shafting is an important construction node, and the installation quality of the shafting is related to the building precision and the operation performance of the ship. In the mounting stage, the positioning and fixing of the stern shaft tube is an indispensable link with larger risk, and the method of epoxy supporting the whole stern tube gradually replaces the method of boring and press mounting the bearing on the stern post structure of the hull. The complete stern tube cooling water tank comprises: the hull structure, the stern pipe, the filler or the connecting piece of hull steel-casting and stern pipe, modern shipbuilding technology is more and more mature with the technique that the epoxy casting fixed the stern central siphon, it is also more and more extensive to use, big and small boats and ships are all using, but also find such a problem in real ship construction, small-size boats and ships are before stern pipe location casting epoxy, leak when preventing the epoxy casting and need seal the front and back terminal surface of stern tube socket, the rear end face does not have the problem in the shutoff of ship outside, but the front end face is located narrow and small stern portion cooling water tank, constructor does not go, even can go into also not have sufficient construction space, lead to sealed not real, epoxy leaks during the casting, the consequence is serious.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a small stern tube epoxy casting self-sealing method.
In order to achieve the purpose, the invention provides the following technical scheme:
a small stern tube epoxy casting self-sealing method comprises the following steps:
firstly, in a shafting thick wire pulling stage, preliminarily verifying that the deviation between a theoretical central line of a shafting and a central line of a stern post steel casting is not more than 3 mm;
step two, after finishing the rough bracing wire, confirming that no problem exists, lighting to position the stern tube, and limiting the rear end of the rubber sealing piece by using a convex shoulder on an inner hole of a stern post steel casting;
thirdly, arranging a pressing stop ring and a rubber sealing piece on the outer circle of the stern tube, after the stern tube is plugged, limiting the rubber sealing piece by using the pressing stop ring and a convex shoulder, and installing temporary pressing screw groups at the left, right, upper and lower proper positions on the rear end surface of a stern column steel casting;
adjusting the radial position of the stern tube by adjusting screws on front and rear stern post steel castings according to the bracing wire lighting process requirement, and finally adjusting the center line of the stern tube to be consistent with the center line of a shafting;
adjusting a compression screw on the end surface of the stern tube, adjusting the axial position of the stern tube to a design value, confirming that the epoxy sealing rubber is compressed to a required value range through measurement and calculation, and locking the compression screw and a radial adjusting screw;
step six, a check fine stay wire is reported to the shipwreck, after the check fine stay wire is finished, a circle of epoxy sealing rubber is added between a stern tube and a stern column steel casting, the epoxy sealing rubber is temporarily fixed on the outermost side by an iron strip until the stern tube is positioned, the front end sealing of an epoxy sealing cavity formed between the outer circle of the stern tube and the stern column steel casting is finished by the rubber sealing ring in the step two, the front and back plugging required by the casting epoxy of the stern column steel casting is finished, and an epoxy service engineer can be officially submitted to finish the casting work;
and step seven, pouring the well-mixed epoxy resin into the cavity from the lower part of the stern post through a delivery pump by an epoxy service engineer, wherein air escapes from a ventilation port at the upper part of the stern post during the pouring process, and the front and rear sealing conditions are inspected while casting until epoxy exists in the ventilation port.
And setting the position of the shoulder in the second step to meet the requirement that the formed epoxy area is greater than or equal to the length of the stern tube bearing.
The total clearance between the shoulder and the outer circle of the stern tube is equal to 20 mm.
And in the third step, calculating the accurate position of the pressing retaining ring according to the thickness and the compression amount of the rubber sealing ring, and fixing the pressing ring on the outer circle of the stern tube in an intermittent welding manner.
After the stern tube is plugged into the stern post steel casting, the distance between the pressing retaining ring and the shoulder is 16 mm.
The invention has the beneficial effects that: the method can reduce the operation difficulty of constructors in a narrow space, shorten the installation period of the shafting, reduce the consumption of epoxy and improve the reliability of epoxy casting.
Drawings
Fig. 1 is a schematic view of the installation of a stern tube and a stern post steel casting of the invention.
Fig. 2 is an enlarged schematic view of a point a in fig. 1.
1-stern tube; 2-a stern post steel casting; 3-adjusting the screw; 4-a rubber seal; and 5, pressing the retaining ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in the figure, the epoxy casting self-sealing method for the small stern tube comprises the following steps:
firstly, in a shafting thick wire pulling stage, preliminarily verifying that the deviation between a theoretical central line of a shafting and the central line of a stern post steel casting 2 is not more than 3 mm; if the deviation exceeds, the theoretical central line needs to be properly adjusted to prevent the situation that the local epoxy thickness is insufficient or the compression ring is staggered and cannot compact the rubber when the stern tube 1 is positioned in the future;
step two, after finishing the rough bracing wire, confirming that no problem exists, lighting to position the stern tube, and limiting the rear end of the rubber sealing piece by using a convex shoulder on an inner hole of a stern post steel casting;
a shoulder is designed at a proper position of an inner hole of a stern post steel casting, so that the purpose of limiting epoxy sealing rubber is achieved, and the using amount of epoxy resin is reduced, wherein the position of the shoulder meets the following two conditions:
a) the length direction ensures that the epoxy area cast in the future is greater than or equal to the length of the stern tube bearing;
b) the inner diameter of the shoulder cannot be too small, otherwise the stern tube cannot pass through or has no local gap when being positioned and adjusted, and cannot play a limiting role, and the preferred diameter in the application is 20 mm.
Thirdly, arranging a pressing stop ring 5 and a rubber sealing element 4 on the outer circle of the stern tube, limiting the rubber sealing element 4 by using the pressing stop ring and a convex shoulder after the stern tube is plugged, and installing temporary pressing screw groups at the left, right, upper and lower proper positions on the rear end surface of a stern column steel casting;
a6 mm thin steel plate is used for cutting a circular ring with the inner diameter consistent with the outer circle of the stern tube and the outer diameter 20mm larger than the outer circle of the stern tube, and the circular ring is used as a pressing retaining ring.
Knowing the compression of the sealing rubber, determining the position of the pressing baffle ring
In order to compact the rubber, which can produce a sealing effect, the position determination of the clamping ring is important:
a) the thickness of the rubber seal and the amount of compression allowed is known from the epoxy supplier;
b) and calculating the accurate position of the outer convex shoulder according to the thickness and the compression amount of the rubber, and fixing the pressing ring on the outer circle of the stern tube by intermittent welding.
In this application, we set the spacing between the locating compression ring and the internal shoulder to 16mm, calculated as a compression of 3-5mm with a rubber thickness of 20 mm.
Meanwhile, in order to prevent the stern tube from moving outwards under the elastic force of rubber after being plugged, 4 groups of temporary compression screws are specially designed on the rear surface of the stern tube and are used for controlling the front and rear positions of the stern tube and the compression amount of the rubber. The screw seat is made into a right-angle shape, and one end of the screw seat is temporarily welded on the stern post steel casting.
Adjusting the radial position of the stern tube by adjusting screws 3 on front and rear stern post steel castings according to the requirement of a stay wire lighting process, and finally adjusting the center line of the stern tube to be consistent with the center line of a shafting;
adjusting a compression screw on the end surface of the stern tube, adjusting the axial position of the stern tube to a design value, confirming that the epoxy sealing rubber is compressed to a required value range through measurement and calculation, and locking the compression screw and a radial adjusting screw;
step six, a check fine stay wire is reported to the shipwreck, a circle of epoxy sealing rubber is added between a stern tube and a stern post after the check fine stay wire is finished, the epoxy sealing rubber is temporarily fixed on the outermost side by an iron strip until the stern tube is positioned, the front end sealing of an epoxy sealing cavity formed between the outer circle of the stern tube and a stern post steel casting is finished by the rubber sealing ring in the step two, the front and back sealing required by the casting epoxy of the stern tube seat is finished, and an epoxy service engineer can be officially submitted to finish the casting work;
and step seven, pouring the well-mixed epoxy resin into the cavity from the lower part of the stern post through a delivery pump by an epoxy service engineer, wherein air escapes from a ventilation port at the upper part of the stern post during the pouring process, and the front and rear sealing conditions are inspected while casting until epoxy exists in the ventilation port.
This application is not just beginning after the stern tube positioning adjustment to the front end of stern tube socket is good, but just has begun from the stopper stern tube assembly, treats that the stern tube is adjusted and the sealed of location back front end has also been accomplished, need not in the past need the people to get into and carry out the sealed operation of stern tube front end in the stern portion cooling water cabin, and it is also more reliable to the front end of stern tube simultaneously, can effectually avoid because of the not reliable phenomenon of revealing that the front end that leads to of space is sealed.
The examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of protection of the present invention.
Claims (5)
1. A small stern tube epoxy casting self-sealing method is characterized in that: which comprises the following steps:
firstly, in a shafting thick wire pulling stage, preliminarily verifying that the deviation between a theoretical central line of a shafting and a central line of a stern post steel casting is not more than 3 mm;
step two, after finishing the rough bracing wire, confirming that no problem exists, lighting to position the stern tube, and limiting the rear end of the rubber sealing piece by using a convex shoulder on an inner hole of a stern post steel casting;
thirdly, arranging a pressing stop ring and a rubber sealing piece on the outer circle of the stern tube, after the stern tube is plugged, limiting the rubber sealing piece by using the pressing stop ring and a convex shoulder, and installing temporary pressing screw groups at the left, right, upper and lower proper positions on the rear end surface of a stern column steel casting;
adjusting the radial position of the stern tube by adjusting screws on front and rear stern post steel castings according to the bracing wire lighting process requirement, and finally adjusting the center line of the stern tube to be consistent with the center line of a shafting;
adjusting a compression screw on the end surface of the stern tube, adjusting the axial position of the stern tube to a design value, confirming that the epoxy sealing rubber is compressed to a required value range through measurement and calculation, and locking the compression screw and a radial adjusting screw;
step six, a check fine stay wire is reported to the shipwreck, after the check fine stay wire is finished, a circle of epoxy sealing rubber is added between a stern tube and a stern column steel casting, the epoxy sealing rubber is temporarily fixed on the outermost side by an iron strip until the stern tube is positioned, the front end sealing of an epoxy sealing cavity formed between the outer circle of the stern tube and the stern column steel casting is finished by the rubber sealing ring in the step two, the front and back plugging required by the casting epoxy of the stern column steel casting is finished, and an epoxy service engineer can be officially submitted to finish the casting work;
and step seven, pouring the well-mixed epoxy resin into the cavity from the lower part of the stern post through a delivery pump by an epoxy service engineer, wherein air escapes from a ventilation port at the upper part of the stern post during the pouring process, and the front and rear sealing conditions are inspected while casting until epoxy exists in the ventilation port.
2. The epoxy casting self-sealing method for small stern tubes according to claim 1, wherein: and setting the position of the shoulder in the second step to meet the requirement that the formed epoxy area is greater than or equal to the length of the stern tube bearing.
3. The epoxy casting self-sealing method for small stern tubes according to claim 1, wherein: the total clearance between the shoulder and the outer circle of the stern tube is equal to 20 mm.
4. The epoxy casting self-sealing method for small stern tubes according to claim 1, wherein: and in the third step, calculating the accurate position of the pressing retaining ring according to the thickness and the compression amount of the rubber sealing ring, and fixing the pressing ring on the outer circle of the stern tube in an intermittent welding manner.
5. The epoxy casting self-sealing method for small stern tubes according to claim 4, wherein: after the stern tube is plugged into the stern post steel casting, the distance between the pressing retaining ring and the shoulder is 16 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110994328.XA CN113602448A (en) | 2021-08-27 | 2021-08-27 | Epoxy casting self-sealing method for small stern tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110994328.XA CN113602448A (en) | 2021-08-27 | 2021-08-27 | Epoxy casting self-sealing method for small stern tube |
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| Publication Number | Publication Date |
|---|---|
| CN113602448A true CN113602448A (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110994328.XA Pending CN113602448A (en) | 2021-08-27 | 2021-08-27 | Epoxy casting self-sealing method for small stern tube |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201538420U (en) * | 2009-12-11 | 2010-08-04 | 大连船舶重工集团有限公司 | Integrated pouring stern tube system |
| CN109466695A (en) * | 2018-12-03 | 2019-03-15 | 浙江国际海运职业技术学院 | Stern tube mounting process |
| CN110758676A (en) * | 2019-10-15 | 2020-02-07 | 江苏新扬子造船有限公司 | Epoxy tightness construction process method for stern tube |
| CN211592898U (en) * | 2019-11-15 | 2020-09-29 | 舟山中远海运重工有限公司 | Epoxy resin sealing retainer ring assembly on inner side of stern tube of ship |
-
2021
- 2021-08-27 CN CN202110994328.XA patent/CN113602448A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201538420U (en) * | 2009-12-11 | 2010-08-04 | 大连船舶重工集团有限公司 | Integrated pouring stern tube system |
| CN109466695A (en) * | 2018-12-03 | 2019-03-15 | 浙江国际海运职业技术学院 | Stern tube mounting process |
| CN110758676A (en) * | 2019-10-15 | 2020-02-07 | 江苏新扬子造船有限公司 | Epoxy tightness construction process method for stern tube |
| CN211592898U (en) * | 2019-11-15 | 2020-09-29 | 舟山中远海运重工有限公司 | Epoxy resin sealing retainer ring assembly on inner side of stern tube of ship |
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Application publication date: 20211105 |