Marine electrolytic tank shell and manufacturing process
Technical Field
The invention relates to a structural form and a manufacturing process of an electrolytic tank shell, which are applied to an electrolytic ship ballast water management system.
Background
The application medium of the shell of the marine electrolytic tank is a strong oxidizing medium, and in the use process, the electrolytic tank is damaged more due to superposition of vibration working conditions and strong corrosiveness. The pure glass fiber reinforced plastic product can leak under the bottom stress state, the steel lining rubber/plastic product is easy to delaminate, the problem of leakage points in the manufacturing process is difficult to control, the strength of the polyvinyl chloride product is low, and the polyvinyl chloride product is easy to deform and damage in the using process.
Disclosure of Invention
The invention aims to provide a marine electrolytic tank shell and a manufacturing process thereof, so as to solve the problems in the prior art.
The technical scheme of the invention is as follows:
A ship electrolytic tank shell comprises an electrolytic tank cylinder body, a looper flange and an end flange, wherein an inlet and an outlet are respectively formed in the cylinder wall, close to two ends, of the electrolytic tank cylinder body, the looper flange is sleeved at two ends of the electrolytic tank cylinder body, cone ends at two ends of the electrolytic tank cylinder body, the outer sides of the looper flanges at two ends are respectively provided with the end flanges matched with the looper flanges, and the looper flanges are connected with each other through connecting bolts when the looper flanges are applied.
The inlet and outlet is composed of inlet and outlet connecting pipes and inlet and outlet flanges, one end of each inlet and outlet connecting pipe is connected with the cylinder wall of the electrolytic tank cylinder, and the other end of each inlet and outlet connecting pipe is connected with the inlet and outlet flange.
The manufacturing process of the marine electrolytic tank shell is characterized by comprising the following steps of:
(1) Preparing a mold and spraying gel coats, namely designing and processing the mold, spraying the gel coats on the inner side of the mold to form a gel coat mold, then carrying out 2-3 layers of hand paste resin lamination on the inner side of the gel coat mold, polishing the surface of each layer of resin lamination after the resin lamination is finished, and ensuring reliable adhesion between adjacent lamination layers;
(2) The method comprises the steps of processing an electrolytic tank cylinder, namely welding a cylinder main pipe, a cone end head, an inlet and outlet connecting pipe and an inlet and outlet flange to form the electrolytic tank cylinder, roughening the outer surface after pressurizing to prevent leakage, removing floating ash, and uniformly coating an activating agent on the outer surface of the cylinder main pipe;
(3) After the activator is dried, coating an adhesive (RM-EJ epoxy two-component interface agent) on the outer surface of the semi-finished product of the electrolytic tank cylinder processed in the previous step, wherein the adhesive has larger adhering work and lower surface energy than the material of the cylinder, coating a layer of alkali untwisted cloth after the adhesive is dried, coating a layer of unsaturated polyester resin on the surface of the untwisted cloth, and winding a plurality of layers of glass fiber cloth;
(4) Paving a vacuum bag material, a sealing system and a vacuumizing system, namely paving demolding cloth, diversion cloth and a vacuum diaphragm on the outer surface of the semi-finished product of the electrolytic tank cylinder body processed in the previous step in sequence, completely coating the whole shell structure by the demolding cloth, backflow cloth and the vacuum diaphragm, arranging a plurality of resin inlet pipes on the surface of the vacuum diaphragm, arranging vacuumizing interfaces at two ends of the vacuum diaphragm and connecting the vacuum pump with the vacuum pump;
(5) Sealing each resin inlet pipe, starting a vacuum pump to continuously vacuumize the whole system, and ensuring that the pressure loss in pressure maintaining for half an hour is not more than 10%;
(6) Introducing resin, namely after the vacuum degree is checked to be qualified, the vacuum pump is not required to be closed, the resin inlet pipe is connected with a container prepared with resin through the glue injection switches, each glue injection switch is sequentially opened from the middle to two sides of the electrolytic tank cylinder body, so that the resin enters the die cavity from the glue injection port until the resin completely dips the glass fiber cloth and fills the die cavity, and after the die filling is finished, the glue injection port is closed;
(7) Curing and shaping, demoulding, namely controlling the ambient temperature to be 10-35 ℃ and the relative humidity to be lower than 80%
Continuously vacuumizing during the curing period, maintaining the vacuum pressure in the die cavity, continuously completing the curing molding for 5-7 hours, removing the vacuum diaphragm, and taking out the product from the die;
(8) After polishing and flattening the surface of the product, brushing unsaturated resin, closing the die with a gel coat die prepared in advance, and opening the die after 6 hours to finish the preparation of the electrolytic tank shell;
(9) The end flange and the looper flange are manufactured by adopting a conventional process, the assembly is completed with the electrolytic tank cylinder after the manufacturing is completed, and the preparation of the electrolytic tank shell is completed after 7.5bar pressure test is performed without leakage.
In the step (2), the activating reagent is acetone or other reagents capable of changing the wetting property of the adhesive to UPVC.
In the step (3), the thickness of the medium alkali untwisted fabric is 0.1-0.3mm, the performance of the unsaturated polyester resin is required to meet the following requirements that the Bakelet hardness is more than or equal to 35, the heat deformation temperature is more than or equal to 55 ℃, the bending strength is more than or equal to 80MPa, the bending elastic modulus is more than or equal to 2700MPa, and the winding thickness of the glass fiber fabric is 3-6mm.
The invention has the advantages that the electrolytic tank shell is manufactured by adopting the standard UPVC/PVC pipeline and glass fiber reinforced plastic composite technology, and the electrolytic tank shell meets the requirement of the use condition in terms of structural form and manufacturing technology, and has the characteristics of high strength, good insulativity, good corrosion resistance, leakage resistance, light weight, simple technology, reliable quality and low price. According to the actual ship use, the electrolytic tank shell has good insulation performance, corrosion resistance and earthquake-proof effect, and completely meets the use requirements of a ship cabin.
Drawings
FIG. 1 is a schematic view of the external structure of an electrolytic cell housing made by the process of the present invention;
FIG. 2 is an axial cross-sectional view of the electrolytic cell cartridge of FIG. 1;
FIG. 3 is an axial cross-sectional view of the end flange of FIG. 1;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 is a schematic end view of the looper flange of FIG. 1;
FIG. 6 is a schematic view of the structure of the process of the present invention when vacuum packaging and resin introduction are performed.
The reference numerals indicate 1-electrolytic tank cylinder, 11, inlet and outlet, 111-inlet and outlet connecting pipe, 112-inlet and outlet flange, 12-cylinder main pipe, 13-cylinder glass fiber reinforced plastic reinforcing layer, 14-cone end, 2-looper flange, 21-mounting hole, 22-butt joint rabbet, 3-end flange, 31-end plate, 32-end plate glass fiber reinforced plastic reinforcing layer, 4-connecting bolt, 5, vacuumizing interface, 6, resin inlet pipe, 7, vacuum diaphragm.
Detailed Description
Referring to fig. 1-5, the marine electrolytic tank shell is characterized by comprising an electrolytic tank cylinder 1, a looper flange 2 and an end flange 3, wherein an inlet and an outlet 11 are respectively formed in the cylinder wall, close to two ends, of the electrolytic tank cylinder 1, the looper flange 2 is sleeved at two ends of the electrolytic tank cylinder 1, cone ends 14 at two ends of the electrolytic tank cylinder 1, the outer sides of the looper flanges 2 at two ends are respectively provided with the end flanges 3 matched with the looper flange, and the two are mutually connected through connecting bolts 4 when the electrolytic tank cylinder is applied, and the marine electrolytic tank shell is characterized in that the electrolytic tank cylinder 1 consists of an inner cylinder main pipe 12 and a cylinder glass reinforced plastic reinforcing layer 13 compounded at the outer side of the inner cylinder main pipe, and the end flange 3 consists of an inner end plate 31 and an end plate glass reinforced plastic reinforcing layer 32 compounded at the outer side of the inner end plate.
The inlet and outlet 11 is composed of an inlet and outlet connecting pipe 111 and an inlet and outlet flange 112, one end of the inlet and outlet connecting pipe 111 is connected with the wall of the electrolytic tank barrel 1, and the other end of the inlet and outlet connecting pipe 111 is connected with the inlet and outlet flange 112.
The materials of each part are as follows:
the electrolytic tank cylinder 1 and the end flange 3 adopt a PVC/UPVC and glass fiber reinforced plastic composite technology.
The main tube 12 and the inlet and outlet connecting tube 111 adopt PVC/UPVC standard pipelines.
The cone end 14 and the end plate 3 are PVC/UPVC plate workpieces.
The inlet and outlet flange 112 is a PVC/UPVC standard flange.
The looper flange 2 is made of metal.
The base resin of the cylinder glass fiber reinforced plastic reinforcing layer 13 and the end plate glass fiber reinforced plastic reinforcing layer 32 is unsaturated polyester resin, and the glass fiber adopts filament fiber, chopped strand mat or square grid cloth.
Referring to fig. 6, the electrolytic tank shell for a ship and the manufacturing process thereof are as follows:
(1) Preparing a mould and spraying a gel coat. The rigid mould shown in figure 1 is designed and processed, the surface of the mould needs to have higher hardness and higher gloss, after the gel coat is sprayed, 2-3 layers of hand paste lamination are made, and the lamination resin needs to be polished, so that the adhesion between the two lamination layers is ensured.
(2) Welding and forming a main tube of the cylinder, a cone end, an inlet and outlet connecting tube and an inlet and outlet flange, roughening by using iron sand paper after pressing to prevent leakage, removing floating ash, and activating the surface by using acetone or other chemical reagents;
(2) The surface of the cylinder body is coated with an adhesive, the adhesive has larger attaching work and lower surface energy than the material of the cylinder body, the adhesive is coated with a layer of 0.2mm medium alkali untwisted cloth after being dried, and a layer of unsaturated polyester resin is coated;
(4) The vacuum bag material, the sealing system and the vacuumizing system are paved, the demolding cloth is paved firstly, then the diversion cloth is paved, and finally the vacuum bag is paved, so that the whole shell structure is completely covered by the vacuum bag film.
(5) After the materials such as the reinforcing material, the vacuum bag and the like are paved in vacuum, all the resin inlet pipes are clamped, and the whole system is vacuumized by adopting a vacuum pump, so that the pressure loss in pressure maintaining for half an hour is ensured to be not more than 10%.
(6) After the vacuum degree is checked to be qualified, the vacuum pump is not required to be closed, the glue injection port end is inserted into a prepared resin barrel, the switch of the glue injection port is sequentially opened according to the feeding sequence, so that the resin enters the die cavity from the glue injection port until the resin is completely immersed in a penetrating medium and fills the die cavity, the feeding process is carried out by paying attention to the amount of the resin, and after the die filling is finished, the glue injection port is closed.
(7) Curing and forming, demoulding, maintaining the vacuum pressure in the mould cavity without closing the vacuum pump during the curing, completing the curing and forming according to the curing process of the resin curing system, removing the vacuum bag material after the resin gel is cured, and taking out the product from the mould.
(8) And (3) polishing and flattening the surface of the product, brushing unsaturated resin, closing the die with a gel coat die prepared in advance, and opening the die after 6 hours to finish the preparation of the electrolytic tank shell.
Specific application examples of the ship electrolytic tank shell manufactured by the invention are as follows:
Example 1:
The ballast pump parameter of a VLCC ship is 3000m3/h 35m, and the BC3000 x 2 ballast water treatment system is adopted, so that the insulation performance, the corrosion resistance and the earthquake resistance of the electrolytic tank shell are good, and the use requirement of a ship cabin is met.
Example 2:
The ballast pump parameter of a certain 11-ten thousand ton oil ship is 2000m 3/h.30m, and the BC 4000.1 ballast water treatment system is adopted, so that the insulation performance, the corrosion resistance and the earthquake resistance of the shell of the electrolytic tank are good, and the use requirement of a ship cabin is met.
Example 3:
the ballast pump parameter of a 40-ten thousand-ton bulk cargo ship is 3000m3/h 35m, and the BC3000 x 2 ballast water treatment system is adopted, so that the electrolytic tank shell has good insulating property, corrosion resistance and earthquake resistance, and meets the use requirement of a ship cabin.