CN102218388A - Equipment and method for pretreating inner wall of zinc-coated steel-plastic composite pipe - Google Patents
Equipment and method for pretreating inner wall of zinc-coated steel-plastic composite pipe Download PDFInfo
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- CN102218388A CN102218388A CN2011100373338A CN201110037333A CN102218388A CN 102218388 A CN102218388 A CN 102218388A CN 2011100373338 A CN2011100373338 A CN 2011100373338A CN 201110037333 A CN201110037333 A CN 201110037333A CN 102218388 A CN102218388 A CN 102218388A
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- galvanized layer
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Abstract
The invention discloses equipment for pretreating an inner wall of a zinc-coated steel-plastic composite pipe, which comprises a loading device, a pickling device, a washing device, a surface regulating device, a phosphating device, a secondary washing device, a drying device, a forced cooling device, an unloading device and a transmission device which are connected through a transmission chain in turn, wherein the pickling device, the washing device, the surface regulating device, the phosphating device and the secondary washing device are provided with a liquid transmission device for transmitting chemical liquid for pretreatment into a zinc-coated steel-plastic composite pipe to be pretreated; and the liquid transmission device directly transmits a corresponding chemical reagent into the pipe to be treated. The invention also discloses a method for pretreating an inner wall of a zinc-coated steel-plastic composite pipe by using the equipment. By the structure, the inner wall of the pipe is treated, and the treatment liquid is prevented from damaging a zinc coat on the outer wall of the pipe.
Description
Technical field
The present invention relates to the inwall preconditioning technique field of external galvanized layer steel-plastics composite pipe, be specifically related to a kind of inwall pre-processing device and method of external galvanized layer steel-plastics composite pipe.
Background technology
Steel-plastics composite pipe is to be parent tube with seamless steel pipe, welded still pipe, interior finishing high adhesion force, polyethylene powders anticorrosion, the food-grade hygiene-type are coated with or epoxy coating, zinc-plated internal plastic coating composite steel tube of feedwater that employing pre-treatment, preheating, application, levelling (or curing), aftertreatment technology are made or combustion gas, fire-fighting spraying inside and outside composite steel tube are the upgraded products of traditional galvanized pipe.
Producing when being coated with compound tube product in zinc-plated at present, the common way of prior art is to select for use inside and outside coating steel pipe as parent tube, is coated with polyethylene or epoxy, polyester powder on this basis.Because the zinc coat of galvanized pipe itself is not high to the adhesion of polyethylene, epoxy powder, tends to cause the undercoating poor adhesion, easily comes off, and influences product appearance and quality.And zinc-plated and plastic-coated is as the surperficial corrosion-resistant technology of same type, and each independent use can both reach anticorrosion effect, therefore, is coated with overlapping use on the compound steel pipe in zinc-plated, both wastes, and has also strengthened cost.
In addition, galvanized pipe is can not do immersion type parkerized, so phosphatization handles and need use acid solution, and surperficial zinc layer is had extremely strong destructive power.So, should promote the spraying effect of external galvanized layer internal plastic coating, can not equally carry out according to traditional phosphatization soaking technology again, at present the domestic relevant report that yet there are no solution.
Summary of the invention
Goal of the invention of the present invention be to provide a kind of inwall pre-processing device of the external galvanized layer steel-plastics composite pipe that can overcome the prior art shortcoming and externally the inwall of galvanized steel plastic composite carry out preprocess method.
For achieving the above object, the present invention adopts following technical scheme: a kind of inwall pre-processing device of external galvanized layer steel-plastics composite pipe, comprise the installation device that connects with driving chain successively, acid dip pickle, water washing device, table is transferred device, phosphating plant, the secondary water washing device, drying unit, forced cooling device, following rack device and transmission device, at described acid dip pickle, water washing device, table is transferred device, phosphating plant, the secondary water washing device is provided with preliminary treatment is input to the infusion set that needs in the pretreated external galvanized layer steel-plastics composite pipe pipe with chemical liquids, described infusion set and corresponding chemical medicine groove connection; Need be placed on the installation device by pretreated external galvanized layer steel-plastics composite pipe, start drive apparatus, the steel pipe that system's driving-chain will be handled gets on from the equipment that installation device is transferred to next process successively, various treatment fluids are in the infusion set input steel pipe at steel pipe two ends, thereby finish the target of inside pipe wall being carried out oil removing, rust cleaning, washing, table accent, phosphatization and secondary water washing successively, this structure has also been avoided the destruction of treatment fluid to pipe outer wall zinc coat when inside pipe wall is handled.
Described infusion set comprises two trumpet type plugs, promotes cylinder and circulating pump that the trumpet type plug moves, on the trumpet type plug, have through hole, the trumpet type plug is connected with circulating pump by this through hole, and the trumpet type plug cooperates easily with the external galvanized layer steel pipe that needs to handle, and transfusion is convenient.
Described pre-processing device is provided with automatic control system, and described transmission device, cylinder and circulating pump are connected with automatic control system, is convenient to automation and controls and produce in a large number.
The present invention also provides a kind of inwall of external galvanized steel plastic composite pretreated method: a kind of inwall preprocess method of external galvanized layer steel-plastics composite pipe, comprise following technical process: pickling → washing → table accent → phosphatization → washing → oven dry → cooling, in the process of described pickling → washing → table accent → phosphatization → washing, only will handle the inside, inside that required chemical liquids is input to needs pretreated external galvanized layer steel pipe, successively import steel pipe in through the EGR at steel pipe two ends various treatment fluids, thereby finish oil removing successively, rust cleaning, targets such as phosphatization have also been avoided the destruction of treatment fluid to pipe outer wall zinc coat when inside pipe wall is handled.
Used acid solution is a hydrochloric acid solution in acid cleaning process, and hydrochloric acid and water by volume percentage 30～40% are prepared, and add 1～2% acid deoiling agent simultaneously in groove by the percentage that accounts for the hydrochloric acid solution cumulative volume.
In described water-washing process, require water quality clean, keep overflow, following water inlet, upper water-out; 0.5～1min is handled in washing; Water in the rinsing bowl can change water once in 1～2 day.
Showing to mediate the reason time in described table accent process is 0.5～1min; Table transfers the total system pH in the bottom of device groove to be controlled at 8～9; If table transfers the pH of groove undesirable, the suitable NaOH solution of available adding is adjusted; Table is adjusted and was changed once table adjustment in general 5～7 days.
The phosphatization treatment temperature is at 30～35 ℃ in described parkerizing process, 10～30 minutes processing times; The phosphatization hydraulic control is 25～35 points built in total acidity in the phosphatization groove, and the free acidity of phosphatization liquid is 1.0～2.0 points, and the concentration of promoter is 1～3 point, acid ratio=total acidity/free acidity=20～30.
In the total acidity/free acidity described in the parkerizing process is 25.
In parkerizing process, the phosphatization steel pipe is repeatedly seethed.
The invention has the beneficial effects as follows: the present invention needs pretreated tubing inside by chemical liquids is directly imported, and has solved to have zinc-plated outer field steel pipe inwall in the past and can not carry out parkerized problem; Outer zinc-plated favorable anti-corrosion effect and both good advantages of internal layer phosphatization processing back spraying effect with coating steel pipe combines simultaneously, efficiently solves the relatively poor problem of adhesive force between tradition zinc-plated (inside and outside wall) steel pipe inwall and the polymeric powder coating; Because it is zinc-plated that this external galvanized layer steel pipe inwall no longer needs, and also effectively saved zinc-plated cost and energy consumption.
Description of drawings
Fig. 1 is a pre-processing device vertical view of the present invention;
Fig. 2 is a pre-processing device front view of the present invention;
Fig. 3 is a trumpet type plug structural representation of the present invention;
Fig. 4 is the present invention chemistry medicine groove figure that puts in order.
Among the figure: 1-installation device, 2-acid dip pickle, 3-water washing device, 4-table are transferred rack device, 10-cylinder, 12-trumpet type plug under device, 5-phosphating plant, 6-secondary water washing device, 7-drying unit, 8-forced cooling device, the 9-.
The specific embodiment
Shown in Fig. 1-4, the inwall pre-processing device of described external galvanized layer steel-plastics composite pipe comprises installation device 1, acid dip pickle 2, water washing device 3, table is transferred device 4, phosphating plant 5, secondary water washing device 6, drying unit 7, forced cooling device 8, following rack device 9, transmission device, the chemical liquid groove, infusion set, with driving-chain with installation device 1, acid dip pickle 2, water washing device 3, table is transferred device 4, phosphating plant 5, secondary water washing device 6, drying unit 7, forced cooling device 8, following rack device 9 connects the back successively and is connected with transmission device, fill different chemical soup dipper and distribute as shown in Figure 4 acid tank, rinsing bowl, table is transferred groove, the phosphatization groove, rinsing bowl is sequentially arranged in acid dip pickle 2, water washing device 3, table is transferred device 4, phosphating plant 5, below the secondary water washing device 6; Infusion set comprises cylinder 10 that two trumpet type plugs 12, promotion trumpet type plug 12 move and the circulating pump of carrying soup, on trumpet type plug 12, have through hole, one of them trumpet type plug 12 is connected with the circulating pump efferent duct by this through hole, the input pipe of circulating pump is provided with the chemical liquids cell body with the bottom and is connected, another trumpet type plug 12 is connected with chemical medicine groove by pipeline, starting cylinder 10, two trumpet type plugs 12 move with the external galvanized layer steel-plastics composite pipe and are sealed and matched, circulating pump starts, and realizes that soup flows in the galvanized steel plastic composite outside; Above-mentioned transmission device, circulating pump, cylinder 10 all are connected with automatic control system.
Adopt the present invention to handle the inwall of external galvanized layer steel-plastics composite pipe, comprise following technical process: pickling → washing → table accent → phosphatization → washing → oven dry → cooling, specific operation process is as follows:
(1) will treat that pretreated external galvanized layer steel-plastics composite pipe is transferred on the acid dip pickle 2 by last device 1, cylinder 10 startings, promote trumpet type plug 12 with the clamping of external galvanized layer steel-plastics composite pipe, by the passage of plug 12 inside pickle is imported in the external galvanized layer steel pipe again, externally coating steel pipe inner wall surface rust, oxide layer are removed, and are generally 5～20min;
(2) the external galvanized layer steel-plastics composite pipe that will pass through acid dip pickle is transferred on the water washing device 3, and infusion set starts, and requires water quality clean during washing, keeps overflow, following water inlet, upper water-out; 0.5～1min is handled in washing; Water in the rinsing bowl can change water once in 1～2 day;
(3) will be transferred on the table accent device 4 by the external galvanized layer steel-plastics composite pipe after washing, infusion set starts, and it is 0.5～1min that table is mediated the reason time; Table transfers the total system pH in the bottom of device groove to be controlled at 8～9; If table transfers the pH of groove undesirable, the suitable NaOH solution of available adding is adjusted; Dirt is black if table is adjusted jaundice, and then aging phenomenon appears in explanation, needs to change again, and replacing in general 5～7 days once table is adjusted;
(4) the external galvanized layer steel-plastics composite pipe of transferring device 4 to come out from table is transferred to the phosphating plant by system's chain, and infusion set starts, 30～35 ℃ of phosphatization treatment temperatures, 10～30 minutes processing times; Monitor the concentration of total acidity, free acidity and the promoter of phosphatization liquid in the phosphatization groove by phased manner;
In the time of monitoring, earlier in the phosphatization groove, get phosphatization liquid (working solution), detect the concentration of its total acidity, free acidity and promoter then, being controlled at total acidity is 25～35 points, the free acidity of phosphatization liquid is 1.0～2.0 points, the concentration of promoter is 1～3 point, and acid ratio=total acidity/free acidity=20～30(25 is advisable);
Measured a total acidity in per 2～4 hours, promoter of measurement in 1～2 hour is counted, and measures free acidity every day 2 times, according to concentration parameter, and an amount of the interpolation, and perform relevant parameters and add record;
The adjusting bonderite of General Acidity in Phosphating Solution and free acidity, about 1 point of 3kg rising total acidity that adds per ton, about 0.13 point of the free acidity that raises simultaneously;
Promoter repeatedly is added to suitable on a small quantity, the general 1kg promoter that adds per ton, promoter concentration about 0.5 point of counting that raises;
If free acidity raises, to turn down with nertralizer, groove per ton, can raise with bonderite if free acidity is on the low side with reducing about 0.1 point of free acidity with powder among the 0.5kg; Also phosphoric acid groove per ton adds 1kg phosphoric acid, about 0.86 point of rising free acid (behind the first dilute with water, the limit edged stirs);
After the external galvanized layer steel-plastics composite pipe entered phosphating plant 1～3min, the phosphatization groove of phosphating plant bottom was wanted gentle agitation, makes phosphating coat even, densification;
Small-caliber steel pipe will be noted seething several times more, makes evenly phosphatization of its surface;
Regularly clear up sediment every day, avoids sediment too much, impact effect;
(5) washing operation same step (2);
External galvanized layer steel-plastics composite pipe after will handling through above steps can carry out the coating of inner powder by drying unit, forced cooling device, following part device.
In the above-mentioned acid cleaning process, with hydrochloric acid by volume percentage be mixed with 30～40% hydrochloric acid solution, pour in the groove, in groove, add 1～2% acid deoiling agent simultaneously by the percentage that accounts for the hydrochloric acid solution cumulative volume.
Above-mentioned table is transferred in the groove, table is adjusted to be mixed with concentration by quality permillage concentration water be 2 ‰ solution, pours in the groove.
In the above-mentioned phosphatization groove, with bonderite by mass percentage water to be mixed with concentration be 5%～6% phosphating solution, pour in the groove, in groove, add simultaneously 1.2 ‰～1.8 ‰ in and the promoter of powder and 1～3 ‰ (1.2 ‰～1.8 ‰ and 1～3 ‰ be meant respectively in and powder or promoter account for the permillage concentration of phosphating solution gross mass).
Claims (10)
1. the inwall pre-processing device of an external galvanized layer steel-plastics composite pipe, it is characterized in that: described pre-processing device comprises the installation device (1) that is in transmission connection successively, acid dip pickle (2), water washing device (3), table is transferred device (4), phosphating plant (5), secondary water washing device (6), drying unit (7), forced cooling device (8), following rack device (9) and transmission device, in described acid dip pickle (2), water washing device (3), table is transferred device (4), phosphating plant (5), secondary water washing device (6) is provided with preliminary treatment is input to the infusion set that needs in the pretreated external galvanized layer steel-plastics composite pipe pipe with chemical liquids, described infusion set and corresponding chemical medicine groove connection.
2. the inwall pre-processing device of external galvanized layer steel-plastics composite pipe according to claim 1, it is characterized in that: described infusion set comprises two trumpet type plugs (12), promotes cylinder (10) and circulating pump that trumpet type plug (12) moves, have through hole on trumpet type plug (12), trumpet type plug (12) is connected with circulating pump by this through hole.
3. the inwall pre-processing device of external galvanized layer steel-plastics composite pipe according to claim 2, it is characterized in that: described pre-processing device is provided with automatic control system, and described automatic control system is connected with circulating pump with described transmission device, cylinder (10).
4. the inwall preprocess method of an external galvanized layer steel-plastics composite pipe, comprise following technical process: pickling → washing → table accent → phosphatization → washing → oven dry → cooling is characterized in that: only will handle the inside that required chemical liquids is input to needs pretreated external galvanized layer steel pipe in the process of described pickling → washing → table accent → phosphatization → washing.
5. the inwall preprocess method of external galvanized layer steel-plastics composite pipe according to claim 4, it is characterized in that: used acid solution is a hydrochloric acid solution in acid cleaning process, hydrochloric acid and water by volume percentage 30～40% are prepared, and add 1～2% acid deoiling agent simultaneously in groove by the percentage that accounts for the hydrochloric acid solution cumulative volume.
6. the inwall preprocess method of external galvanized layer steel-plastics composite pipe according to claim 5 is characterized in that: require water quality clean in described water-washing process, keep overflow, following water inlet, upper water-out; 0.5～1min is handled in washing; Water in the rinsing bowl can change water once in 1～2 day.
7. the inwall preprocess method of external galvanized layer steel-plastics composite pipe according to claim 4 is characterized in that: showing to mediate the reason time in described table accent process is 0.5～1min; Table transfers the total system pH in the bottom of device groove to be controlled at 8～9; If table transfers the pH of groove undesirable, the suitable NaOH solution of available adding is adjusted; Table is adjusted and was changed once table adjustment in general 5～7 days.
8. the inwall preprocess method of external galvanized layer steel-plastics composite pipe according to claim 4 is characterized in that: in described parkerizing process the phosphatization treatment temperature at 30～35 ℃, 10～30 minutes processing times; The phosphatization hydraulic control is 25～35 points built in total acidity in the phosphatization groove, and the free acidity of phosphatization liquid is 1.0～2.0 points, and the concentration of promoter is 1～3 point, acid ratio=total acidity/free acidity=20～30.
9. the inwall preprocess method of external galvanized layer steel-plastics composite pipe according to claim 8 is characterized in that: described acid is than being 25.
10. it is characterized in that: the phosphatization steel pipe is repeatedly seethed according to Claim 8 or the inwall preprocess method of 9 described external galvanized layer steel-plastics composite pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110037333 CN102218388B (en) | 2011-02-14 | 2011-02-14 | Equipment and method for pretreating inner wall of zinc-coated steel-plastic composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110037333 CN102218388B (en) | 2011-02-14 | 2011-02-14 | Equipment and method for pretreating inner wall of zinc-coated steel-plastic composite pipe |
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| Publication Number | Publication Date |
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| CN102218388A true CN102218388A (en) | 2011-10-19 |
| CN102218388B CN102218388B (en) | 2013-07-24 |
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| CN 201110037333 Expired - Fee Related CN102218388B (en) | 2011-02-14 | 2011-02-14 | Equipment and method for pretreating inner wall of zinc-coated steel-plastic composite pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111458A (en) * | 2016-08-18 | 2016-11-16 | 洛阳国润新材料科技股份有限公司 | A kind of full-automatic inside and outside operational approach being coated with coating line of steel conduit |
| CN108085706A (en) * | 2016-11-19 | 2018-05-29 | 天津欧津汇溢市场调查有限公司 | A kind of Building technology service rust removing device for steel tube |
| CN111139491A (en) * | 2020-03-15 | 2020-05-12 | 朱增 | Steel pipe galvanizing pretreatment equipment |
| CN113481513A (en) * | 2021-07-29 | 2021-10-08 | 张家港市惠氏电器有限公司 | Automatic acid pickling phosphating equipment for case production and automatic acid pickling phosphating process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5812742A (en) * | 1981-07-16 | 1983-01-24 | Nippon Kokan Kk <Nkk> | Manufacture of plastic-covered steel pipe |
| CN101671825A (en) * | 2009-10-13 | 2010-03-17 | 广东联塑科技实业有限公司 | Pre-treating technique for composite metal plastic pipe |
| CN202028520U (en) * | 2011-02-14 | 2011-11-09 | 广东联塑科技实业有限公司 | Pretreatment equipment for inner wall of steel plastic composite pipe with outer zinc coating |
-
2011
- 2011-02-14 CN CN 201110037333 patent/CN102218388B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5812742A (en) * | 1981-07-16 | 1983-01-24 | Nippon Kokan Kk <Nkk> | Manufacture of plastic-covered steel pipe |
| CN101671825A (en) * | 2009-10-13 | 2010-03-17 | 广东联塑科技实业有限公司 | Pre-treating technique for composite metal plastic pipe |
| CN202028520U (en) * | 2011-02-14 | 2011-11-09 | 广东联塑科技实业有限公司 | Pretreatment equipment for inner wall of steel plastic composite pipe with outer zinc coating |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111458A (en) * | 2016-08-18 | 2016-11-16 | 洛阳国润新材料科技股份有限公司 | A kind of full-automatic inside and outside operational approach being coated with coating line of steel conduit |
| CN106111458B (en) * | 2016-08-18 | 2018-08-21 | 洛阳国润新材料科技股份有限公司 | A kind of full-automatic inside and outside operating method for applying coating line of steel conduit |
| CN108085706A (en) * | 2016-11-19 | 2018-05-29 | 天津欧津汇溢市场调查有限公司 | A kind of Building technology service rust removing device for steel tube |
| CN111139491A (en) * | 2020-03-15 | 2020-05-12 | 朱增 | Steel pipe galvanizing pretreatment equipment |
| CN111139491B (en) * | 2020-03-15 | 2020-12-29 | 平顶山市中开防腐有限公司 | Steel pipe galvanizing pretreatment equipment |
| CN113481513A (en) * | 2021-07-29 | 2021-10-08 | 张家港市惠氏电器有限公司 | Automatic acid pickling phosphating equipment for case production and automatic acid pickling phosphating process |
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| CN102218388B (en) | 2013-07-24 |
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