CN110261042B - Weld joint leakage prevention detection method for oil storage steel tank - Google Patents
Weld joint leakage prevention detection method for oil storage steel tank Download PDFInfo
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- CN110261042B CN110261042B CN201910484397.9A CN201910484397A CN110261042B CN 110261042 B CN110261042 B CN 110261042B CN 201910484397 A CN201910484397 A CN 201910484397A CN 110261042 B CN110261042 B CN 110261042B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
- G01M3/14—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/146—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
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Abstract
The invention relates to the technical field of weld joint detection, and discloses a weld joint anti-leakage detection method of an oil storage steel tank, which comprises the process steps of cleaning, coating detection liquid, drying, coating penetrating liquid, setting penetration time, observing and checking and the like, wherein the observing and checking comprises the step of observing and checking a weld joint by using a magnifying glass, the coating penetrating liquid comprises the step of coating kerosene by using a kerosene coating rope assembly, and the kerosene coating rope assembly comprises an oil storage cotton rope and a magnetic adsorption piece connected to the oil storage cotton rope; the oil storage cotton rope is a cotton rope with kerosene soaked inside, is distributed along welding line pasting and is fixed through the magnetic adsorption piece adsorbed on the inner surface of the oil storage steel tank. The method can improve the reliability of the anti-leakage detection of the welding seam of the oil storage steel tank on the basis of lower implementation cost, and has good safety.
Description
Technical Field
The invention relates to the technical field of weld joint detection, in particular to a weld joint anti-leakage detection method for an oil storage steel tank.
Background
An oil storage steel tank is an oil storage device for a gas station. The oil storage steel tank is a welded structural member, and in order to prevent oil leakage of a welding seam, the oil storage steel tank needs to be subjected to welding seam anti-leakage detection after being manufactured.
In the prior art, the leakage detection of the weld joint of the oil storage steel tank is usually performed by adding water into the oil storage steel tank for leakage observation so as to detect possible leakage points. The detection method is convenient and low in detection cost, but the permeability of the water is relatively poor due to the large tension of the water, and some tiny leakage points cannot be detected.
If the reliability of detection is to be improved, a hydraulic test can be adopted, but for a large oil storage steel tank, the hydraulic test tool is a special tool, the size is large and complex, the implementation cost is high, and particularly, the economical efficiency is not high for the normal-pressure oil storage steel tank.
Disclosure of Invention
In order to solve the problems, the invention provides a weld joint anti-leakage detection method for an oil storage steel tank, aiming at improving the reliability of the weld joint anti-leakage detection of the oil storage steel tank on the basis of lower implementation cost. The specific technical scheme is as follows:
a welding seam leakage prevention detection method for an oil storage steel tank comprises the following steps:
and step 3, drying: waiting for drying of the detection liquid;
step 4, coating penetrating fluid: after the detection liquid is dried, coating a layer of kerosene as penetrating liquid at the weld joint of the inner surface of the oil storage steel tank;
step 6: setting the permeation time: presetting a set value of kerosene penetration time to enable the kerosene to fully penetrate into a leakage position of a welding seam;
and 5, observation and inspection: when the kerosene penetration time reaches or exceeds the set value of the kerosene penetration time, observing and checking a welding line coated with detection liquid on the outer surface of the oil storage steel tank, checking whether spots appear or not, if the spots appear, indicating that the position is a leakage point, and marking the position of the leakage point;
and the observation and inspection comprises the step of observing and inspecting the welding seam by using a magnifying lens.
In the technical scheme, the kerosene is used as a permeation medium, compared with a conventional water-adding permeation detection method, the kerosene has stronger permeability due to small surface tension and contact angle, and can permeate through tiny gaps and tiny capillary pores, and after entering a leakage point of a welding seam, the kerosene is adsorbed by white melting powder (formed after the detection liquid is dried) coated on the surface of the welding seam and generates oil spots, so that the leakage point position of the welding seam can be found. The magnifying glass is used for observing and checking the welding seam, so that the detection sensitivity can be improved, and the missing detection of fine defects caused by direct observation is reduced.
As a further improvement of the present invention, in the step 4 of coating the penetrating fluid, a kerosene coating rope assembly is used to coat the kerosene, wherein the kerosene coating rope assembly comprises an oil storage cotton rope and a magnetic adsorption member connected to the oil storage cotton rope; the oil storage cotton rope is a cotton rope with kerosene soaked inside, is distributed along welding line pasting and is fixed through the magnetic adsorption piece adsorbed on the inner surface of the oil storage steel tank.
The kerosene coating rope assembly is adopted in the process of coating the penetrating fluid, compared with the conventional kerosene spraying method, the kerosene coating rope assembly can enable the kerosene inside the oil storage cotton rope to be continuously supplemented into cracks possibly existing on welding seams in the kerosene penetration process, so that the penetration of the kerosene is more sufficient and thorough, the defect that the kerosene penetration is insufficient easily caused by the traditional kerosene spraying method is overcome, the reliability of the leakage prevention detection of the welding seams of the oil storage steel tank is improved, the implementation cost of the kerosene coating rope assembly is lower, the using amount of the kerosene is less, and the penetration effect is more lasting than that of the conventional spraying method.
On the other hand, the method for fixing the oil storage cotton rope by the magnetic adsorption piece has more flexible and convenient operation.
As one of the preferable schemes of the magnetic adsorption piece in the invention, the magnetic adsorption piece is a plurality of magnet blocks which are connected to the oil storage cotton rope and are distributed at intervals, a cotton rope positioning groove and a pair of threading holes which are used for installing and positioning the oil storage cotton rope are arranged on one surface of the magnet block, which is in contact with the inner surface of the oil storage steel tank, the threading holes are respectively arranged on two sides of the cotton rope positioning groove, the threading holes are through holes, the oil storage cotton rope is provided with a frenulum, and the oil storage cotton rope and the magnet blocks are connected together through the pair of threading holes by the frenulum.
The connection of magnet piece and oil storage cotton rope is realized to the cotton rope constant head tank and the through wires hole that above-mentioned magnetism adsorption piece that adopts magnet to be fast utilizes setting up on the magnet piece, and the structure is comparatively simple on the one hand, and on the other hand can make the fixed more firm on oil storage steel tank surface of oil storage cotton rope.
As a second preferable embodiment of the magnetic adsorption member of the present invention, the magnetic adsorption member is a flexible magnetic strip, an oil storage tank having two non-through ends is disposed on a magnetic adsorption surface of the flexible magnetic strip, and the oil storage cotton rope is installed in the oil storage tank.
The magnetic adsorption piece adopting the flexible magnetic strip is used for arranging the oil storage cotton rope in the oil storage tank of the flexible magnetic strip, so that the sagging loss of kerosene is further reduced, and the durability and the reliability of permeation detection are improved.
Preferably, the flexible magnetic strip is provided with a threaded connector for oiling, which is communicated with the inside of the oil storage tank.
Above-mentioned magnetic adsorption piece that adopts flexible magnetic stripe can seal the oil storage cotton rope inside after its flexible magnetic stripe adsorbs on the oil storage steel tank, utilizes to refuel and can fill with the infiltration of kerosene in order to carry out the welding seam and detect in the oil storage tank with hickey, has increased substantially from this and has penetrated the reliability that detects.
In addition, the magnetic adsorption piece adopting the flexible magnetic strip seals the oil storage cotton rope in the oil storage tank of the flexible magnetic strip to play a role in fire prevention, so that the safety of kerosene penetration detection is greatly improved.
As a further improvement of the invention, a circle of vacuum adsorption groove is arranged on the periphery of the oil storage groove on the magnetic adsorption surface of the flexible magnetic strip, and a vacuumizing threaded interface communicated with the inside of the vacuum adsorption groove is arranged on the flexible magnetic strip.
The above-mentioned magnetic adsorption face through at flexible magnetic stripe sets up the vacuum adsorption groove, can adsorb the surface at the oil storage steel tank more reliably with flexible magnetic stripe and play very strong sealed effect, because the adsorption affinity is big for can fill the kerosene of certain pressure in the oil storage tank and carry out the infiltration and detect, further improved the reliability that the infiltration detected from this.
Preferably, in the step 4 of coating the penetrating fluid, the kerosene coating rope assembly with the flexible magnetic strip covers the welding seam, the vacuum absorption groove is vacuumized, so that the flexible magnetic strip is firmly attached to the periphery of the welding seam and forms a seal, and then kerosene is added into the oil storage groove of the flexible magnetic strip through a threaded connector for refueling.
Preferably, the kerosene added into the oil storage tank through the oil filling threaded connector is pressure oil so as to realize the pressure permeation of the kerosene.
Preferably, the kerosene added into the oil storage tank through the oil filling threaded connector is heating kerosene so as to realize heating penetration of the kerosene.
Preferably, for butt weld seams and double-sided lap weld seams welded on the base plate, the kerosene pressurizing and permeating detection is carried out after the base plate and the weld seams are covered by the kerosene coating rope assembly with the flexible magnetic strips.
According to the invention, for butt welding seams and double-sided lap welding seams welded on the base plate, the kerosene coating rope assembly with the flexible magnetic strip is adopted to cover the base plate and the welding seams and then kerosene pressurization penetration detection is carried out.
The invention has the beneficial effects that:
firstly, the method for detecting the leakage of the welding line of the oil storage steel tank adopts kerosene as a permeable medium, compared with the conventional water-adding permeability detection method, the method has stronger permeability because of small surface tension and contact angle of the kerosene, and can permeate through tiny gaps and tiny capillary holes, and after the kerosene enters a leakage point of the welding line, white melting powder (formed by drying detection liquid) coated on the surface of the welding line is adsorbed and generates oil spots, so that the leakage point position of the welding line can be found. The magnifying glass is used for observing and checking the welding seam, so that the detection sensitivity can be improved, and the missing detection of fine defects caused by direct observation is reduced.
Secondly, according to the method for detecting the leakage of the welding seam of the oil storage steel tank, the kerosene coating rope assembly is adopted in the process of coating the penetrating fluid, compared with the conventional kerosene spraying method, the kerosene inside the oil storage cotton rope can be continuously supplemented into the cracks possibly existing on the welding seam in the kerosene penetration process, so that the kerosene penetration is more sufficient and thorough, the defect that the kerosene penetration is insufficient due to the fact that the conventional kerosene spraying method is easy to cause is overcome, the reliability of detecting the leakage of the welding seam of the oil storage steel tank is improved, the implementation cost of the kerosene coating rope assembly is lower, the using amount of the kerosene is less, and the penetration effect is more durable compared with the conventional spraying method.
Thirdly, according to the method for detecting the weld leakage of the oil storage steel tank, the oil storage cotton rope is fixed through the magnetic adsorption piece, and the operation is flexible and convenient.
Fourthly, according to the method for detecting the leakage of the welding line of the oil storage steel tank, the magnetic adsorption piece with the fast magnet is adopted, and the cotton rope positioning groove and the threading hole are formed in the magnet block to realize the connection of the magnet block and the oil storage cotton rope, so that the structure is simple, and the oil storage cotton rope can be more firmly fixed on the surface of the oil storage steel tank.
Fifthly, according to the method for detecting the weld leakage of the oil storage steel tank, the oil storage cotton rope is arranged inside the oil storage tank of the flexible magnetic strip by adopting the magnetic adsorption piece of the flexible magnetic strip, so that the sagging loss of kerosene is further reduced, and the durability and reliability of penetration detection are improved.
Sixth, according to the method for detecting the leakage of the weld joint of the oil storage steel tank, the flexible magnetic strip of the magnetic adsorption piece adopting the flexible magnetic strip is adsorbed on the oil storage steel tank, so that the oil storage cotton rope can be sealed inside, and the oil filling threaded interface can be used for filling kerosene in the oil storage tank to perform the penetration detection of the weld joint, so that the reliability of the penetration detection is greatly improved.
Seventh, according to the method for detecting the leakage of the welding seam of the oil storage steel tank, the oil storage cotton rope is sealed in the oil storage groove of the flexible magnetic strip through the magnetic adsorption piece of the flexible magnetic strip, so that a fireproof effect can be achieved, and the safety of kerosene penetration detection is greatly improved.
Eighth, according to the method for detecting the leakage of the weld joint of the oil storage steel tank, the vacuum adsorption groove is formed in the magnetic adsorption surface of the flexible magnetic strip, so that the flexible magnetic strip can be reliably adsorbed on the surface of the oil storage steel tank and can play a strong sealing role, and the kerosene with certain pressure can be filled in the oil storage groove for permeation detection due to the large adsorption force, so that the reliability of the permeation detection is further improved.
Ninth, for the butt weld and the double-sided lap weld welded on the backing plate, the kerosene pressurizing penetration detection is carried out after the kerosene coating rope assembly with the flexible magnetic strip covers the backing plate and the weld, compared with the traditional kerosene pressurizing penetration detection method which needs drilling at the backing plate, the kerosene pressurizing penetration detection method has the advantages that the operation is more convenient, the detection reliability is better, and the detection efficiency is higher because the drilling and the repair welding of holes after the detection are not needed.
Drawings
FIG. 1 is a schematic structural diagram of a kerosene coating rope assembly (magnetic adsorption member is a magnet) used in a method for detecting the leakage of a weld of an oil storage steel tank according to the present invention;
FIG. 2 is a sectional view of the magnet block and the oil storage cotton string in FIG. 1;
FIG. 3 is a schematic structural diagram of another kerosene coating rope assembly (the magnetic adsorption member adopts a flexible magnetic strip);
FIG. 4 is a bottom view of FIG. 3;
fig. 5 is a schematic view of the application of the kerosene coating line assembly of fig. 3.
In the figure: 1. kerosene scribbles rope assembly, 2, oil storage cotton rope, 3, magnet piece, 4, cotton rope constant head tank, 5, through wires hole, 6, frenulum, 7, flexible magnetic stripe, 8, oil storage tank, 9, refuel and use the hickey, 10, vacuum adsorption groove, 11, take out the vacuum and use the hickey, 12, flaring groove, 13, take out the vacuum and use screwed joint, 14, refuel and use screwed joint, 15, oil storage steel tank, 16, welding seam, 17, backing plate.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Fig. 1 to 5 show an embodiment of a method for detecting leakage of a weld of an oil storage steel tank according to the present invention, which includes the following steps:
and step 3, drying: waiting for drying of the detection liquid;
step 4, coating penetrating fluid: after the detection liquid is dried, coating a layer of kerosene as penetrating liquid at the weld joint of the inner surface of the oil storage steel tank 15;
step 6: setting the permeation time: presetting a set value of kerosene penetration time to enable the kerosene to fully penetrate into a leakage position of a welding seam;
and 5, observation and inspection: when the kerosene penetration time reaches or exceeds the set value of the kerosene penetration time, observing and checking a welding line coated with detection liquid on the outer surface of the oil storage steel tank 15, checking whether spots appear or not, if the spots appear, indicating that the position is a leakage point, and marking the position of the leakage point;
and the observation and inspection comprises the step of observing and inspecting the welding seam by using a magnifying lens.
In the technical scheme, the kerosene is used as a permeation medium, compared with a conventional water-adding permeation detection method, the kerosene has stronger permeability due to small surface tension and contact angle, and can permeate through tiny gaps and tiny capillary pores, and after entering a leakage point of a welding seam, the kerosene is adsorbed by white melting powder (formed after the detection liquid is dried) coated on the surface of the welding seam and generates oil spots, so that the leakage point position of the welding seam can be found. The magnifying glass is used for observing and checking the welding seam, so that the detection sensitivity can be improved, and the missing detection of fine defects caused by direct observation is reduced.
As a further improvement of this embodiment, in the step 4 of coating the penetrating fluid, a kerosene coating string assembly 1 is used to coat the kerosene, wherein the kerosene coating string assembly 1 comprises an oil storage cotton string 2 and a magnetic adsorbing member connected to the oil storage cotton string 2; wherein, oil storage cotton rope 2 is the cotton rope that inside flooding has kerosene, oil storage cotton rope 2 is along welding seam subsides and distributes and through adsorbing on 15 internal surfaces of oil storage steel tank the magnetic adsorption piece is fixed.
The kerosene coating rope assembly 1 is adopted in the process of coating the penetrating fluid, compared with the conventional kerosene spraying method, the kerosene inside the oil storage cotton rope 2 can be continuously supplemented into cracks possibly existing on the welding seam 16 in the kerosene penetration process, so that the penetration of the kerosene is more sufficient and thorough, the defect that the traditional kerosene spraying method is insufficient in penetration is overcome, the reliability of leakage prevention detection of the welding seam of the oil storage steel tank 15 is improved, the implementation cost of the kerosene coating rope assembly 1 is lower, the using amount of the kerosene is less, and the penetration effect is more durable than that of the conventional spraying method.
On the other hand, the oil storage cotton rope 2 is fixed by a magnetic adsorption piece, and the operation is flexible and convenient.
As one of the preferred scheme of magnetic adsorption piece in this embodiment, the magnetic adsorption piece is for connecting magnet piece 3 of a plurality of quantity that just interval distribution was gone up to the oil storage cotton rope 2 lie in on magnet piece 3 with 15 internal surface contact's of oil storage steel tank one side is provided with and is used for the installation location cotton rope positioning groove 4 and a pair of through wires hole 5 of oil storage cotton rope 2, a pair of through wires hole 5 arrange in the both sides of cotton rope positioning groove 4, through wires hole 5 is the through-hole, be provided with frenulum 6 on the oil storage cotton rope 2, frenulum 6 pass through a pair of through wires hole 5 will oil storage cotton rope 2 links together with magnet piece 3.
The aforesaid adopts the magnetism adsorption piece of magnet 3 to utilize cotton rope constant head tank 4 and the through wires hole 5 that sets up on magnet piece 3 to realize being connected of magnet piece 3 and oil storage cotton rope 2, and the structure is comparatively simple on the one hand, and on the other hand can make the fixed more firm on oil storage cotton rope 2 on 15 surfaces of oil storage steel tank.
As a second preferable mode of the magnetic adsorbing member in this embodiment, the magnetic adsorbing member is a flexible magnetic strip 7, an oil storage tank 8 with two non-through ends is opened on a magnetic adsorbing surface of the flexible magnetic strip 7, and the oil storage cotton rope 2 is installed in the oil storage tank 8.
The magnetic adsorption piece adopting the flexible magnetic strip 7 is used for arranging the oil storage cotton rope 2 in the oil storage tank 8 of the flexible magnetic strip 7, so that the sagging loss of kerosene is further reduced, and the durability and the reliability of permeation detection are improved.
Preferably, the flexible magnetic strip 7 is provided with a nipple 9 for oiling, which is communicated with the inside of the oil storage tank 8.
Above-mentioned magnetic adsorption piece that adopts flexible magnetic stripe 7 can seal oil storage cotton rope 2 inside because its flexible magnetic stripe 7 adsorbs on oil storage steel tank 15 back, utilizes to refuel and can fill up kerosene in oil storage tank 8 with the infiltration of carrying out welding seam 16 with threaded connection 9, has improved the reliability that infiltration detected from this by a wide margin.
In addition, the magnetic adsorption piece adopting the flexible magnetic strip 7 can seal the oil storage cotton rope 2 in the oil storage tank 8 of the flexible magnetic strip 7 to play a role in fire prevention, so that the safety of kerosene penetration detection is greatly improved.
As a further improvement of this embodiment, a circle of vacuum adsorption groove 10 is formed on the magnetic adsorption surface of the flexible magnetic stripe 7 at the periphery of the oil storage groove 8, and a screw interface 11 for vacuum pumping communicating with the inside of the vacuum adsorption groove 10 is formed on the flexible magnetic stripe 7.
The vacuum adsorption groove 10 is arranged on the magnetic adsorption surface of the flexible magnetic strip 7, so that the flexible magnetic strip 7 can be more reliably adsorbed on the surface of the oil storage steel tank 15 and plays a strong sealing role, and the adsorption force is large, so that kerosene with certain pressure can be filled into the oil storage groove 8 for permeation detection, and the reliability of permeation detection is further improved.
Preferably, in the step 4 of coating the penetrating fluid, the kerosene coating rope assembly 1 with the flexible magnetic strip 7 covers the welding seam 16, the vacuum absorption tank 10 is vacuumized, so that the flexible magnetic strip 7 is firmly attached to the periphery of the welding seam 16 and forms a seal, and then the kerosene is added into the oil storage tank 8 of the flexible magnetic strip 7 through the oil filling threaded interface 9.
Preferably, the kerosene added into the oil storage tank 8 through the nipple 9 for refueling is pressure oil to realize the pressure permeation of the kerosene.
Preferably, the kerosene added into the oil storage tank 8 through the threaded connector 9 for refueling is heating kerosene to realize heating penetration of the kerosene.
Preferably, for butt welding seams and double-sided lap welding seams welded on the backing plate 17, the kerosene pressurizing and permeating detection is carried out after the kerosene coating rope assembly 1 with the flexible magnetic strips 7 covers the backing plate 17 and the welding seams 16.
In the embodiment, for butt welding seams and double-sided lap welding seams welded on the base plate 17, the kerosene coating rope assembly 1 with the flexible magnetic strips 7 is adopted to cover the base plate 17 and the welding seams 16 and then carry out kerosene pressurization and permeation detection, compared with a traditional method that the kerosene pressurization and permeation detection is carried out after drilling holes in the base plate 17, the operation is more convenient, the detection reliability is better and the detection efficiency is higher because the holes are not required to be drilled and repaired and welded after the detection.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A weld joint leakage prevention detection method for an oil storage steel tank is characterized by comprising the following steps:
step 1, cleaning: cleaning the welding seam of the oil storage steel tank to remove dirt and rust;
step 2, coating detection liquid: coating white powder emulsion or carclazyte emulsion on the welding seam on the outer surface of the oil storage steel tank to serve as detection liquid for detecting whether the welding seam has a leakage point;
and step 3, drying: waiting for drying of the detection liquid;
step 4, coating penetrating fluid: after the detection liquid is dried, coating a layer of kerosene as penetrating liquid at the weld joint of the inner surface of the oil storage steel tank;
step 6: setting the permeation time: presetting a set value of kerosene penetration time to enable the kerosene to fully penetrate into a leakage position of a welding seam;
and 5, observation and inspection: when the kerosene penetration time reaches or exceeds the set value of the kerosene penetration time, observing and checking a welding line coated with detection liquid on the outer surface of the oil storage steel tank, checking whether spots appear or not, if the spots appear, indicating that the position is a leakage point, and marking the position of the leakage point;
wherein the observation and inspection comprises the step of observing and inspecting the welding seam by using a magnifying lens;
in the step 4 of coating penetrating fluid, a kerosene coating rope assembly is adopted for coating kerosene, and the kerosene coating rope assembly comprises an oil storage cotton rope and a magnetic adsorption piece connected to the oil storage cotton rope; the oil storage cotton rope is a cotton rope with kerosene soaked inside, is distributed along a welding line in an attaching mode and is fixed through the magnetic adsorption piece adsorbed on the inner surface of the oil storage steel tank;
magnetic adsorption piece is for connecting on the oil storage cotton rope and the magnet piece of a plurality of quantity of interval distribution lie in on the magnet piece with the one side of oil storage steel tank internal surface contact is provided with and is used for the installation location the cotton rope constant head tank and a pair of through wires hole of oil storage cotton rope, a pair of through wires hole branch arrange in the both sides of cotton rope constant head tank, the through wires hole is the through-hole, be provided with the frenulum on the oil storage cotton rope, the frenulum pass through a pair of through wires hole will the oil storage cotton rope links together with the magnet piece.
2. The method for detecting the leakage prevention of the welding seam of the oil storage steel tank as claimed in claim 1, wherein the magnetic adsorption member is a flexible magnetic strip, an oil storage tank with two non-through ends is formed on a magnetic adsorption surface of the flexible magnetic strip, and the oil storage cotton rope is installed in the oil storage tank.
3. The method for detecting the leakage of the welding seam of the oil storage steel tank as claimed in claim 2, wherein the flexible magnetic strip is provided with a nipple for oiling communicated with the inside of the oil storage tank.
4. The method for detecting the leakage of the weld joint of the oil storage steel tank as claimed in claim 3, wherein a circle of vacuum adsorption groove is formed on the periphery of the oil storage groove on the magnetic adsorption surface of the flexible magnetic strip, and the flexible magnetic strip is provided with a vacuumizing threaded interface communicated with the inside of the vacuum adsorption groove.
5. The method for detecting the leakage of the welding seam of the oil storage steel tank as claimed in claim 4, wherein in the step 4 of coating the penetrating fluid, the kerosene coating rope assembly with the flexible magnetic strip covers the welding seam, the vacuum absorption tank is vacuumized to make the flexible magnetic strip firmly adhere to the periphery of the welding seam and form a seal, and then kerosene is added into the oil storage tank of the flexible magnetic strip through a threaded connector for refueling.
6. The method for detecting the weld leakage of the oil storage steel tank as claimed in claim 5, wherein the kerosene added into the oil storage tank through the nipple for refueling is used as pressure oil to realize the pressure permeation of the kerosene.
7. The method for detecting the weld leakage of the oil storage steel tank as claimed in claim 5, wherein the kerosene added into the oil storage tank through the nipple for refueling is heated kerosene to achieve heating penetration of the kerosene.
8. The method for detecting the leakage of the welding line of the oil storage steel tank as claimed in claim 5, wherein the mouth of the oil storage tank is provided with a flared groove for accommodating a welding backing plate, and kerosene pressurization penetration detection is performed after the kerosene coating rope assembly with the flexible magnetic strip is adopted to cover the backing plate and the welding line for butt welding and double-sided lap welding on the backing plate.
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| CN112254885B (en) * | 2020-09-07 | 2022-12-20 | 江阴市富仁高科股份有限公司 | Pressure container circumferential weld anti-leakage detection tool and process |
| CN112247316B (en) * | 2020-09-07 | 2022-08-12 | 江阴市富仁高科股份有限公司 | Welding process of pressure container |
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