CN1044739C - Technique for repairing subsiding deformation of atmospheric plastic container - Google Patents
Technique for repairing subsiding deformation of atmospheric plastic container Download PDFInfo
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- CN1044739C CN1044739C CN94100150A CN94100150A CN1044739C CN 1044739 C CN1044739 C CN 1044739C CN 94100150 A CN94100150 A CN 94100150A CN 94100150 A CN94100150 A CN 94100150A CN 1044739 C CN1044739 C CN 1044739C
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Abstract
The present invention relates to technology for repairing the depressed deformation of an atmospheric pressure plastic container, which is especially suitable for repairing containers made of steel plates, such as oil storage tanks, oil drums, etc. The present invention is characterized in that fluid, such as air, water, etc., is filled in the container and is pressurized to lead the part of the depressed deformation to be reset. A damaged arch top ribbed plate is repaired by matching the pressurization operation in a tank. Longitudinal and transverse reinforcing ribs are arranged on the outer side of the tank top, and points of force application are arranged on the outer wall of the inwards inclined part of the tank wall. A tractor is used for pulling the points of force application. Repairing methods, for example, the circle of the tank wall or wrapping angle steel is corrected by a saddle support, etc., are used for the container with the depressed deformation to restore use standards. The technology has the advantages of convenience, high speed, labor saving and material saving.
Description
The present invention relates to the renovation technique behind a kind of subsiding deformation of atmospheric plastic container, be specially adapted to the reparation of canisters such as oil product storage tank, oil drum.
For the normal pressure container made from plastic materials such as metals, because improper use or manufacturing deficiency, container wall or top meeting depressed deformation have reduced use value, scrap so that can not use.Especially for the large and medium-sized oil product storage tank of steel, because misoperation when fuel-displaced, produce a negative pressure state in making jar and happen occasionally, under the atmospheric pressure effect, can make the inside large size of tank skin or tank deck (tens so that hundreds of square metre) depressed deformation.In the coastal strong area of wind-force of waiting, strong wind makes the storage tank depression so that overturn also and can take place.In some occasion, the large size depressed deformation causes the oil refining apparatus operation unstability of continuous mass production, even stops work.In the prior art.Renovation technique behind the oil product storage tank depressed deformation is with reference to the manufacturing mounting process of new jar, change the steel plate at depression position: scaffolding, upright newel, umbrella stand and tank deck mold in jar to be repaired, if lifting and welding equipment, then with gas cutting, hang except that the dismantle steel plate of tank deck or tank skin depressed deformation of operation, install, weld new steel plate again." oil refinery equipment overhaul manual " manufacturing equipment fascicle chapter 8 (petroleum industry publishing house in June, 1980 version) has been introduced this method.Its complex process, consume that steel are many, labor intensity is big, long in time limit.Therefore, seeking the renovation technique of easy, quick, saving of labor, material-saving, is the important topic that normal pressure plastic container, especially oil product storage tank are repaired.
The subsiding deformation of atmospheric plastic container renovation technique that the purpose of this invention is to provide a kind of easy, quick, saving of labor, material-saving.
The object of the present invention is achieved like this: charge into air or inert gas, water or other fluid to the normal pressure plastic container of depressed deformation, pressurization is when making container inner pressure reach certain value, the position of container wall or top depressed deformation will be swelled, pressure is removed in the back time-delay that resets, and makes its typing, restores to the original state.
Technological scheme of the present invention is based on the plastic material generation depressed deformation that constitutes normal pressure container wall or top can restore this principle, and can stand for the distortion bending part of the steel plate of making large and medium-sized container wall such as oil product storage tank or device top that secondary realizes greater than crooked unlikely this performance that ruptures of 90 °.When container charges into fluid,, pressure make container wall or distortion bending place, top play the stress σ that corrects the flexural stress effect when reaching
jGreater than container wall or the intrinsic yield limit σ of topping material
sThe time, back-flexing takes place in the bending part, until flattening original state.
Be metallic material such as steel plate for container wall and top, Fig. 1 is corrected the schematic representation of flexural stress for container wall or top depressed deformation section, and the angle of the biside plate AB of seamed edge place, the BC of its distortion bending is the obtuse angle greater than 100 °, is continuous rounding off form.At the ABC section that has caved in, AB=L
1, BC=L
2P is the pressure that charges in the storage tank, promptly acts on the rectification flexural stress σ of sunk part
jσ
j＞σ
sBe the necessary condition that reseting procedure is finished, can derive thus
δ is a plate thickness; K is the correction factor relevant with notch area.As seen for the steel plate of several millimeters thick, if notch area hundreds of square metre, the pressure that only need charge into column up to a hundred gets final product; Suitable boost pressure, the depression of small size also can flatten.Illustrate that this technology applicability is strong, notch area is not had harsh requirement.
Fill fluid, pressurization, after making the depressed deformation position all protuberance resetting, pressure is removed in time-delay, keep-ups pressure the long period, so that a few hours make its typing.For the storage tank of sheet with rib vault construction, press the back tank deck to still have downwarp if remove, illustrate that gusset has inefficacy, technology of the present invention can pressurising in jar again, and a band press operation in going into jar is to the gusset shaping of damage, weld and can eliminate downwarp.Also can adopt external reinforcement technology, at tank deck outside installing warp, broadwise stiffening rib.If the tank body distortion has interior position to inclination for tank skin, the tank skin perpendicularity that shows as this position is poor, and technology of the present invention is to establish several Point of Strength at the outer wall at this position, with hitching machinery such as winch dragline, makes its fourth contact.The also available top of technology of the present invention draws support to tank shell or top angle school circle.
Adopt subsiding deformation of atmospheric plastic container renovation technique of the present invention, reached the purpose of easy, quick, saving of labor, material-saving significantly.For the reparation of oil product storage tank, avoided materials consumption, engineering work load can reduce 50%-80%, and the duration shortens 60%-90%, and handling safety has been improved working condition.
The drawing of accompanying drawing is described as follows:
Fig. 1 is corrected the schematic representation of flexural stress for container wall or top depressed deformation section;
Fig. 2 is the charger connection diagram;
Fig. 3 is outer wall traction figure;
Fig. 4 draws support and school circle diagram thereof for the top;
Fig. 5 is an atmospheric storage tank tank deck stiffening rib layout plan;
Fig. 6 is the sectional drawing of Fig. 5.
Below in conjunction with embodiment the present invention is done further statement.
Embodiment 1
The renovation technique of oil product storage tank:
1, each opening of sealing oil tank is installed charger, pressure meter and pipeline thereof.Each opening of storage tank can be by closing its valve or sealing with blind plate.Fig. 2 shows the charger connection diagram.Select the arbitrary opening such as the sewage draining exit 2 of storage tank 1 for use, import pressurized air.So, install the blind plate 4 that has two passages at the exhaust end of blowdown valve 3.Pressurized air is introduced from pipeline 8, enters storage tank 1 through passage, blowdown valve 3, the sewage draining exit 2 of valve 7, blind plate 4.Pressure meter 6 is connected with storage tank 1 through another passage, blowdown valve 3, the sewage draining exit 2 of pipeline 5, blind plate 4.
2, slowly import pressurized air, regulate air inflow with valve 7, the control pressure of storage tank, all protuberance resets up to the depressed deformation position.Pressure is removed in the back time-delay that resets, and keep-ups pressure about 2 hours, makes its typing.
3, partial trim:
(1) remove and press the back tank deck that obvious downwarp is arranged, then pressurising in jar again, a band press operation in personnel enter jar to the gusset shaping of the vault construction that damages, weld, is removed pressure again, has eliminated downwarp.
(2) have the tank skin perpendicularity in an orientation obviously overproof, to the position that tilts, so establish 3 Point of Strength at the outer wall at this position, use the winch dragline in having, the fourth contact effect is better.See Fig. 3.
(3) draw support that tank shell or top angle are carried out the school circle with the top, also obtain promising result.See Fig. 4.
Embodiment 2
External reinforcement technology is eliminated the tank deck downwarp:
The renovation technique of oil product storage tank presses the back tank deck to still have obvious downwarp with embodiment 1 for removing, and present embodiment adopts the external reinforcement trim process.Pressurising in jar is again strengthened gusset (9), broadwise reinforcement gusset (10) at tank deck outside installing warp-wise then, removes pressure again, eliminates downwarp.See Fig. 5.
Embodiment 3
The renovation technique of oil drum:
This oil drum because of misoperation by taken out flat, the bucket the both sides inwall fit mutually.Present embodiment, is taken out flat oil drum and is heaved when reaching certain pressure to the oil drum water-filling, restores to the original state.Local finishing is handled with the method for knocking, pushing when band is pressed.Press through recession in about 2 hours, effect is satisfied.
Claims (4)
1, a kind of renovation technique of subsiding deformation of atmospheric plastic container is characterized in that charging into fluid in the normal pressure plastic container of depressed deformation, pressurization, and after making the depressed deformation position all protuberance resetting, pressure is removed in time-delay, makes its typing.
2, renovation technique according to claim 1 is characterized in that still having some depressions after removing pressure, once more pressurising and in the outside at container wall depression position or the inboard stiffening rib that is welded.
3, renovation technique according to claim 1 is characterized in that for tank skin intilted position being arranged, and establishes Point of Strength at the outer wall at this position, draws with hitching machinery, makes its fourth contact.
4, renovation technique according to claim 1 is characterized in that drawing support to tank shell or top angle school circle with the top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94100150A CN1044739C (en) | 1994-01-15 | 1994-01-15 | Technique for repairing subsiding deformation of atmospheric plastic container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94100150A CN1044739C (en) | 1994-01-15 | 1994-01-15 | Technique for repairing subsiding deformation of atmospheric plastic container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1105318A CN1105318A (en) | 1995-07-19 |
| CN1044739C true CN1044739C (en) | 1999-08-18 |
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ID=5029477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94100150A Expired - Fee Related CN1044739C (en) | 1994-01-15 | 1994-01-15 | Technique for repairing subsiding deformation of atmospheric plastic container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1044739C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225780A (en) * | 2017-06-23 | 2017-10-03 | 安徽尚蓝环保科技有限公司 | A kind of deformable plastic bucket Fast Restoration method |
| CN113042638A (en) * | 2021-04-02 | 2021-06-29 | 中核核电运行管理有限公司 | Method for repairing nuclear-grade storage tank in buckling state |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2056724U (en) * | 1987-08-25 | 1990-05-02 | 岳德康 | Combined storage tank for marsh gas cell |
-
1994
- 1994-01-15 CN CN94100150A patent/CN1044739C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2056724U (en) * | 1987-08-25 | 1990-05-02 | 岳德康 | Combined storage tank for marsh gas cell |
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| Publication number | Publication date |
|---|---|
| CN1105318A (en) | 1995-07-19 |
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| CF01 | Termination of patent right due to non-payment of annual fee |