CN110758676B - Epoxy tightness construction process method for stern tube - Google Patents
Epoxy tightness construction process method for stern tube Download PDFInfo
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- CN110758676B CN110758676B CN201910978026.6A CN201910978026A CN110758676B CN 110758676 B CN110758676 B CN 110758676B CN 201910978026 A CN201910978026 A CN 201910978026A CN 110758676 B CN110758676 B CN 110758676B
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- tightness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
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Abstract
The invention relates to a stern tube epoxy tightness construction process method, and belongs to the technical field of ship construction. On the basis of the original process, the airtight construction is carried out by utilizing the modes of an O-shaped ring, tapping on a steel casting and two half-shell epoxy baffles; the haver type epoxy baffle has a 2mm gap with the stern tube, and even if the stern tube is adjusted in a micro-scale mode, the O-shaped ring can well fill the micro-displacement space. The epoxy tightness construction process method of the stern tube effectively solves the problem of water seepage of the cooling water tank of the stern tube in time. Finally, the construction site is satisfied, the late doubtful worry of shipowners about water seepage is eliminated, the construction quality is guaranteed, the policy is avoided, and the cost is reduced.
Description
Technical Field
The invention relates to a stern tube epoxy tightness construction process method, and belongs to the technical field of ship construction.
Background
Along with the requirement of shortening the construction period, the method of epoxy supporting the integral stern tube gradually replaces the method of boring a press-mounting bearing on a hull stern post structure. The complete stern tube cooling water tank comprises: the ship comprises a ship body structure, a stern tube, a ship body steel casting and filler or a connector of the stern tube;
the epoxy resin is used as a filler between the hull steel casting and the stern tube, plays a main role in rigid support of the tail tube and indirectly bears and transmits shafting load. The specific pressure of the epoxy resin is 4.5-5.0 MPa.
Because the main function of the epoxy resin is the supporting function, the epoxy resin can not isolate the water leakage or seepage of the cooling water cabin of the stern tube. Therefore, the chockfast orange PR610 TCF, Epocast 36, Durasin, EPY, Loctite fixmaster line choking and CMP all play a role in supporting the overall stern tube, are chemical substances, are limited by temperature and environment, and more or less generate some air holes which can not be seen by naked eyes in the pouring process of polymer measurement.
Due to the unavoidable conditions, epoxy manufacturers are supplemented to isolate water in a tail pipe cooling water tank by epoxy sealant, so that the capacity of cooling water is finally ensured, and heat in the shafting operation process is effectively taken away in time; the specific implementation is as follows: and (4) replacing the sealing strip during epoxy pouring with the sealant after the epoxy is cured.
The technical problem that the tail pipe cooling water tank seeps into the engine room is also found during pilot run. In the early days, a lot of misjudgments show that the sealant used by a certain manufacturer is different. Later-stage replacement of manufacturers, even if the same epoxy resin is used, more or less problems exist on different ships;
aiming at the above inevitable technical problems, in order to hand over ships, the following strategies are: two Harvard baffles are welded between the tail pipe and the hull steel casting in the cooling water tank by argon arc welding with small thermal deformation, so that the hull structure, the baffles and the tail pipe form a complete closed steel enclosure wall type cooling water tank;
however, generally speaking, the sealant and the epoxy are both polymer materials, the thermal expansion coefficient is different from that of steel, and water seepage is inevitable in the use process, so that glue filling is required for a plurality of ships; the method has small space, is not easy to weld and can damage the paint of the tail pipe. In addition, water lubricated ships cannot be welded with steel castings. Meanwhile, due to welding with the steel casting, the sealing problem is the same as that the preheating and heat preservation are carried out at 150 ℃.
Disclosure of Invention
The invention aims to solve the problems in the background, and provides a stern tube epoxy tightness construction process method, which ensures the water tightness of a cooling water cabin in the pilot and practical processes, ensures that water does not permeate into the cabin, and creatively solves the tightness problem of the stern tube and the cooling water cabin.
The purpose of the invention is realized as follows: a stern tube epoxy tightness construction process method comprises the following steps:
the method comprises the following steps: checking that the epoxy position of the excircle of the stern tube is free from paint, the inner hole of a steel casting of the ship body is free from paint, and the epoxy position is free from paint;
step two: processing two haffian-type epoxy pressure plates and preparing matched thin sponge pieces;
step three: after the wire is drawn coarsely, arranging a ferrule on the front end face of the stern post, drawing a check circle on the front end face and the rear end face of the ferrule, and pre-tapping a threaded hole matched with the haver type epoxy pressure plate on the original steel casting and the ferrule;
step four: sleeving a sealing pressure plate of a stern tube cooling water tank on a stern tube in advance by using an O-shaped sealing ring;
step five: adjusting, positioning and checking a stern tube;
step six: after the stern tube is positioned, filling epoxy enclosing plugs on two epoxy end plugs, reversely installing two half-type epoxy pressure plates, winding a matched thin sponge sheet on the corresponding position on the outer diameter of the stern tube, and screwing bolts on pre-tapping holes on the original steel casting; (the haver type epoxy pressure plate plays a role in preventing the pump pressure from being too high and the epoxy from flowing out in the epoxy pouring stage, and the pressure plate plays a role in compacting the O-shaped ring in the ship operation stage and ensuring the integral tightness of the whole stern tube cooling water tank)
Step seven: pouring epoxy resin inwards from a pouring gate;
step eight: after the epoxy is cured and the sample block is qualified, two Huffman type epoxy pressure plates at the middle part and the bow part of the stern tube are disassembled, and the epoxy enclosing plug is removed lightly by using an art designing knife; after the glass is completely cleaned by acetone, a safety sealant is coated; (the epoxy resin does not have water tightness per se, and can not isolate seawater from entering the engine room, the sealant in the step eight is the first guarantee for ensuring the tightness of the cooling water cabin and ensuring that the stern tube lubricating oil can be cooled in time)
Step nine: after the end face of the sealant is leveled and dried, arranging an O-shaped sealing ring prearranged on the original stern tube on the outer side of the sealant, and cleaning the end face of a stern steel casting, the threaded hole and the two Harvard baffles; and coating sealant on the end surface of the stern steel casting corresponding to the half-type epoxy pressure plate, positively installing the pressure plate, coating thread sealant on the bolt, and screwing the bolt.
And the O-shaped sealing ring in the ninth step is tightly pressed by the Haffy type epoxy pressing plate and is positioned in a gap between the positively-mounted Haffy type epoxy baffle and the stern tube, and the O-shaped ring is extruded to fill the gap between the pressing plate and the stern tube so as to ensure the tightness. Therefore, the integral tightness of the stern tube cooling water tank can be ensured under the conditions of expansion with heat and contraction with cold of the stern tube and the hull steel casting under different sea areas and different sea conditions of the ship.
The front end and the rear end of the stern tube are respectively provided with a stern tube adjusting bracket which is an L-shaped adjusting bracket.
The haven epoxy press plate in the above step is composed of two half press plates forming a cavity.
Compared with the prior art, the invention has the following advantages:
the O-shaped sealing ring is tightly pressed by the two haver plates, and a 2mm gap is formed between the two haver plates and the stern tube, so that even if the stern tube is subjected to micro adjustment, the O-shaped sealing ring can well fill the micro displacement space.
Therefore, under the condition that both the hardness and the tightness are ensured, the invention creatively adopts a non-welding method, elastically solves the technical problem of the industry, has an elastic operation space, ensures the safe operation of the whole shafting, is convenient for the cooling water tank and the seawater outside the ship to generate heat exchange instantly, ensures the respective tightness and avoids the integral integrity (no leakage) of the cooling water of the stern tube cooling water tank under various draft conditions of the ship.
In conclusion, the epoxy tightness construction process method for the stern tube utilizes the O-shaped sealing ring, the half-type epoxy pressing plate and the tapping matched with the pressing plate, effectively solves the problem of water seepage of the cooling water tank of the stern tube in time, and solves the problem of water seepage risk caused by the factors of different expansion coefficients of epoxy sealant and steel, large temperature difference and sea condition fluctuation; finally, the construction site is satisfied, the late doubtful worry of shipowners about water seepage is eliminated, the construction quality is guaranteed, the policy is avoided, and the cost is reduced.
Drawings
Fig. 1 is an overall layout view of the present invention after installation of a haversian epoxy pressure plate, wherein:
1. hull steel castings; 2. a stern tube cooling water tank; 3. a ferrule; 4. a stern tube adjusting bracket; 5. a stern tube cooling water cabin; 6. a stern bearing; 7. a stern tube; 8. a first epoxy pouring gate; 9. a first epoxy vent hole; 10. a third epoxy air-permeable port; 11. a second epoxy vent hole; 12. a second epoxy pouring gate; 13. epoxy enclosing; 14. epoxy coating of stern tube; 15. a haversian epoxy press plate.
Fig. 2 is a side cross-sectional view of the left end face of the present invention.
Fig. 3 is a side sectional view of the right end face of the present invention.
Fig. 4 is a schematic diagram of the inverse installation of the haver type epoxy pressure plate of the present invention.
Fig. 5 is a schematic view of the assembly of the haver type epoxy pressure plate of the present invention, wherein:
16. an O-shaped sealing ring.
Detailed Description
The invention is described below with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1 to 5, a process method for constructing a stern tube with epoxy tightness comprises the following steps:
the method comprises the following steps: checking that the epoxy position of the excircle of the stern tube has no paint, the inner hole of the hull steel casting 1 has no paint at the epoxy position;
step two: processing two hafford type epoxy pressure plates 15 and preparing matched thin sponge pieces;
step three: after the wire is drawn coarsely, a ferrule 3 is arranged on the front end face of the stern post, check circles are drawn on the front end face and the rear end face of the ferrule 3, and threaded holes matched with the HALF type epoxy pressure plates are pre-tapped on the original steel casting and the ferrule;
in this embodiment, the threaded hole may be an M12 threaded hole;
step four: sleeving a sealing pressure plate of a stern tube cooling water tank 2 on a stern tube in advance by using an O-shaped sealing ring 16;
step five: adjusting, positioning and checking the stern tube 7;
step six: after the stern tube 7 is positioned, the epoxy enclosing plugs 13 are plugged at the two epoxy ends, two half-type epoxy pressure plates 15 are reversely arranged, matched thin sponge pieces are wound at the corresponding positions on the outer diameter of the stern tube 7, and bolts are screwed on the pre-tapping holes on the original ship body steel casting; (the haver type epoxy pressure plate 15 plays a role in preventing the pump pressure from being too high and the epoxy from flowing out in the epoxy pouring stage, and plays a role in compacting the O-shaped ring and ensuring the integral tightness of the whole stern tube cooling water tank in the ship operation stage)
Step seven: pouring the stern tube epoxy layer 14 inwards from the pouring gate;
step eight: after the epoxy is cured and the sample block is qualified, two Huffman type epoxy pressure plates 15 at the middle part and the bow part of the stern tube are disassembled, and the epoxy enclosing plug 13 is removed lightly by an art designing knife; after the glass is completely cleaned by acetone, a safety sealant is coated; (the epoxy resin does not have water tightness per se, and can not isolate seawater from entering the engine room, the sealant in the step eight is the first guarantee for ensuring the tightness of the cooling water cabin and ensuring that the stern tube lubricating oil can be cooled in time)
Step nine: after the end face of the sealant is leveled and dried, arranging an O-shaped sealing ring 16 prearranged on the original stern tube on the outer side of the sealant, and cleaning the end face of a stern steel casting, a threaded hole and two haver type epoxy pressure plates 15; and coating sealant on the position of the half-type epoxy pressure plate corresponding to the end surface of the stern steel casting, assembling the pressure plate, coating thread sealant on the bolt, and screwing the bolt.
The O-ring 16 in the ninth step is compressed by the haven epoxy pressure plate 15 and is located in the gap between the forward mounted haven epoxy baffle 15 and the stern tube 7. The tightness of the stern tube cooling water tank 2 is guaranteed, a second channel guarantee that the stern tube lubricating oil can be cooled in time is guaranteed, the O-shaped sealing ring 16 is compressed, and the overall tightness of the whole stern tube cooling water tank is guaranteed.
The front end and the rear end of the stern tube 7 are respectively provided with a stern tube adjusting bracket 4, and the stern tube adjusting bracket 4 is an L-shaped adjusting bracket.
In this embodiment, there are a plurality of stern tube adjusting brackets 4, and the plurality of stern tube adjusting brackets 4 are circumferentially and uniformly distributed at the front and rear ends of the stern tube 7 with the transverse axis of the stern tube 7 as a reference.
In this embodiment, the number of the stern tube adjusting brackets 4 may be 8, and 4 stern tubes are respectively provided at the front and rear ends of the stern tube 7.
In this embodiment, the tail end of the hull steel casting 1 in the first step is further provided with a tail pipe flange, two hoop-opening notches are symmetrically arranged on the tail pipe flange from top to bottom, one of the hoop-opening notches is used as a first epoxy pouring gate 8, and the other hoop-opening notch is used as a first epoxy vent hole 9 during epoxy pouring.
In the embodiment, a second epoxy pouring port 12 and a second epoxy vent port 11 are further arranged on the collar in the third step, the second epoxy pouring port 12 is located on the middle vertical line and is arranged in the vertical direction, and the second epoxy vent port 11 and the middle vertical line form an included angle of 10-15 degrees;
in this embodiment, the second epoxy vent 11 is arranged at an angle of 10 ° with respect to the vertical line of the middle portion.
In this embodiment, the ferrule is further provided with a drill hole, and is welded with the sprue adapter and the riser short pipe during epoxy pouring;
the sprue adapter is a flat port at one end and a threaded port at the other end.
In this embodiment, the hull steel casting in the first step is further provided with a third epoxy vent hole 10, and the third epoxy vent hole 10 is arranged above the middle section of the integrated stern tube 7.
In this embodiment, the haversian epoxy platen in the above step is composed of two halves forming the cavity.
In this embodiment, the epoxy enclosing plug 13 in the sixth step may be an epoxy sponge enclosing plug;
in this embodiment, the safety sealant in the step eight may be a safety "AB" sealant.
In this embodiment, a transparent tube may be introduced to the first epoxy vent 9 or the third epoxy vent 10 to observe the epoxy shrinkage before the stem of the stern tube is epoxidized, and to conveniently and timely judge the supplementary epoxy.
The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (2)
1. A stern tube epoxy tightness construction process method is characterized in that: the method comprises the following steps:
the method comprises the following steps: checking that the epoxy position of the excircle of the stern tube is free from paint, the inner hole of a steel casting of the ship body is free from paint, and the epoxy position is free from paint;
step two: processing two haffian-type epoxy pressure plates and preparing matched thin sponge pieces;
step three: after the wire is drawn coarsely, arranging a ferrule on the front end face of the stern post, drawing a check circle on the front end face and the rear end face of the ferrule, and pre-tapping a threaded hole matched with the haversian epoxy pressure plate on the original steel casting and the ferrule;
step four: sleeving an O-shaped sealing ring on a stern tube in advance;
step five: adjusting, positioning and checking a stern tube;
step six: after the stern tube is positioned, filling epoxy enclosing plugs at two ends of the epoxy, reversely installing two hafford type epoxy pressure plates, winding a matched thin sponge sheet at a corresponding position on the outer diameter of the stern tube, screwing bolts on corresponding pre-tapping holes, wherein the hafford type epoxy pressure plates play a role in preventing overhigh pump pressure and epoxy from flowing out in an epoxy pouring stage, and play a role in compacting an O-shaped ring in a ship operation stage to ensure the integral tightness of a cooling water tank of the whole stern tube;
step seven: pouring epoxy resin inwards from a pouring gate;
step eight: after the epoxy is cured and the sample block is qualified, two Huffman type epoxy pressure plates at the middle part and the bow part of the stern tube are disassembled, and the epoxy enclosing plug is removed lightly by using an art designing knife; after the glass is completely cleaned by acetone, a safety sealant is coated;
step nine: after the end face of the sealant is leveled and dried, arranging an O-shaped sealing ring prearranged on the original stern tube on the outer side of the sealant, and cleaning the end face of a stern steel casting, the threaded hole and the two Harvard baffles; coating sealant on the end surface of the stern steel casting corresponding to the half-type epoxy pressure plate, positively installing the pressure plate, coating thread sealant on the bolt, and screwing the bolt;
and C, pressing the O-shaped sealing ring in the step nine by using a half-type epoxy pressing plate, positioning the O-shaped sealing ring in a gap between a half-type epoxy baffle plate and the stern tube, and filling a gap between the pressing plate and the stern tube after the O-shaped sealing ring is extruded to ensure the tightness and the integral tightness of the stern tube cooling water tank under the conditions of expansion with heat and contraction with cold of the stern tube and the hull steel casting in different sea areas and under different sea conditions of the ship.
2. The epoxy tightness construction process method for the stern tube according to claim 1, wherein: the front end and the rear end of the stern tube are respectively provided with a stern tube adjusting bracket which is an L-shaped adjusting bracket.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910978026.6A CN110758676B (en) | 2019-10-15 | 2019-10-15 | Epoxy tightness construction process method for stern tube |
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| CN201910978026.6A CN110758676B (en) | 2019-10-15 | 2019-10-15 | Epoxy tightness construction process method for stern tube |
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| CN110758676B true CN110758676B (en) | 2021-06-25 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112158313A (en) * | 2020-09-22 | 2021-01-01 | 广州文冲船厂有限责任公司 | Tail shaft tube adjusting tool and using method |
| CN112298515A (en) * | 2020-11-06 | 2021-02-02 | 江龙船艇科技股份有限公司 | Shafting prevents that stopper dragon warp and dual-purpose device of cooling |
| CN113602448A (en) * | 2021-08-27 | 2021-11-05 | 浙江国际海运职业技术学院 | Epoxy casting self-sealing method for small stern tube |
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2019
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