JP2652165B2 - Leak prevention method for fluid storage equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for preventing leakage of a fluid storage facility.

[Prior Art] Conventionally, in order to prevent leakage from a tank for storing gas or oil, a construction method as shown in FIGS. 3 to 5 is generally performed.

FIG. 3 shows a conventional example in which an epoxy resin-based coating film C1 is applied several times with an epoxy resin-based paint on the inner surface of a tank in the vicinity of a polymerization step portion 3 of steel plates 1, 1 constituting a fluid storage facility, Leakage from the polymerization seam 1 is prevented.

In the conventional example shown in FIG. 4, the polymerization step 3 is first covered with a resin sheet 6 made of vinyl ester or the like.
Steel plate with epoxy resin paint
The polymerization seam is covered with a resin sheet 6 and an epoxy resin laminate coating C1 to prevent leakage.

FIG. 5 shows a conventional example in which a steel angle 5 covers the overlapping step portion 3 including two rivets, and both ends 5a and 5a are welded. An epoxy resin-based paint is also applied, including the welded portion, and covered with an epoxy resin laminate coating C1 to prevent leakage.

[Problems to be Solved by the Invention] However, the above-mentioned conventional construction method ensures complete sealing immediately after construction, but when the storage facilities are deformed or local strain occurs, the epoxy resin laminated coating C1 It is known to have a drawback that cracks and cracks are generated in the steel and may leak.

That is, in the conventional example shown in FIG.
It was observed that the followability of 1 was insufficient, and that the coating film indicated by reference numeral 7a was cracked and leakage might occur, and in the example of FIG. Observed.

In addition, although the example of FIG. 5 has relatively few occurrences of cracks in the coating film, it takes a lot of time and labor to perform the work, and particularly, the welding of the lower part of the steel angle 5 becomes a very difficult operation.
Similarly, the followability of the epoxy resin laminated coating film C1 with respect to the movement of the steel angle 5 and the steel plate 1 was insufficient, and cracking of the coating film 7c sometimes occurred.

Accordingly, the present invention has been made in view of the above-described drawbacks, and has a sufficient follow-up property even if the storage facility is deformed or causes local strain, and a fluid storage facility capable of preventing fluid leakage over the period. The purpose of the present invention is to provide a method for preventing the leakage of water.

[Means for Solving the Problems] In order to solve the above-mentioned problems, in order to solve the above-mentioned problems, in order to solve the above-mentioned problems, a steel plate constituting a fluid storage facility is described. 1,1 rivets 2
Cleaning the peripheral portion of the polymerization step portion 3 including the portion or the peripheral portion of the concrete seam 3a to form a cleaning surface A from which deposits such as oil and dust are removed. As a second step, the entire surface of the cleaning surface A is cleaned. Then, the sealing agent immediately after mixing the vulcanizing agent into the liquid synthetic rubber thiocol is applied as a pre-coating layer B1, and as a third step, with the sealing agent having a predetermined viscosity after a certain period of time after vulcanization, A caulking gun is filled with the same material and a high-viscosity sealing agent, and the caulking gun is used to seal the pre-coating layer B1 applied in the previous process into the polymerization step portion 3 or the concrete seam 3a. The final coating layer B2 is formed by laminating the sealing agent thicker near the upper surface of the head of the rivet 2 and near the periphery thereof to form a final coating layer B2. After flattening the surface of the layer B2, the surface of the main coating layer B2 is In which it took technical means, characterized in that the pre-applying layer B1 entire surface finishing by applying the same sealing flashing agent as used in the second step layer B3 was no such laminated including.

[Operation] Therefore, the method for preventing leakage of the fluid storage facility of the present invention uses the sealing agent applied in the second to fourth steps to prevent the polymerization step 3
The sealing agent used in the present invention is obtained by mixing a vulcanizing agent into liquid synthetic rubber thiocol, and therefore, at room temperature for a predetermined period of time after vulcanization. It solidifies underneath to form a rubber-like elastic body. In general, vulcanized and hardened and solidified rubber bodies are not evident from the fact that molded products cannot be removed from the mold unless a release agent such as silicon is applied to the mold for molding rubber products. Although it is inferior to epoxy resin, it has strong adhesion, strong oil resistance, and of course has high elasticity, so it follows local movement and deflection of fluid storage equipment, and is less likely to crack or peel. Is provided.

Further, the present invention is to apply the sealing agent a plurality of times in the second to fourth steps, the properties of the sealing agent in each of these steps,
In particular, the viscosity can be appropriately changed, and the first coating layer B1 applied in the second step and the finishing layer B3 applied in the fourth step can be applied in a state of high fluidity. It can be reliably applied to uneven surfaces, and it can be applied in the third step by reducing the amount of the vulcanizing agent to be mixed to increase flexibility and adhesion. The main coating layer B2 can be made to be laminated thicker in a state where the fluidity is small and the viscosity is high, as a result, this pre-coating layer B1 is as an adhesion basic surface, and the main coating layer B2 is as a pressure-resistant surface, The finishing layer B3 interacts with the final coating layer as an anti-peeling surface.

Embodiment Next, an embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1, 1 is a steel plate constituting a fluid storage facility, 2 is a rivet to which the steel plate 1, 1 is fixed, 3 is a superposed step portion of the steel plate 1, 1 and 3a is a concrete seam.

That is, in the example of FIG. 1, the steel plates 1, 1, 1,.
2, 2 ', 2 ... are connected and fixed to constitute a conventionally known fluid storage facility. In the example of FIG. 2, concrete walls 1', 1 ', 1' ... are joined by seams 3a, 3a. , 3a... Constitute a conventionally known fluid storage facility.

As a first step, the present invention cleans the peripheral portion of the overlapping step portion 3 including the two rivets 1 and 1 of the steel plate constituting the fluid storage facility or the peripheral portion of the concrete seam 3a to remove oil and dust and the like. The cleaning surface A from which the attached matter has been removed is formed.

The cleaning surface A is a superposed step 3 or a concrete joint.
A predetermined width along 3a is polished with a buff or sandpaper, or wiped with a methyl-ethyl-ketone cleaning liquid. In the case where the fluid storage facility is a rivet connection structure using steel plate 1,1 rivets 2,2,2..., The width of the cleaning surface A is such that the rivets 2,2,2. Like that.

In the second step, an encapsulant obtained by mixing a vulcanizing agent with liquid synthetic rubber thiocol is applied as a first coating layer B1 on the entire surface of the cleaning surface A. The application of the first coating layer B1 is generally performed by brush coating, but may be performed by spray coating. In addition,
The entire surface of the cleaning surface A does not necessarily mean the entire area that has been cleaned. The cleaning surface A having a somewhat wide width is formed, a tape is attached to an end portion, the cleaning surface A is limited by the tape, and a finished appearance is obtained. Better is, of course, desirable.

In the embodiment shown in FIG. 1, a second pre-coat layer B1 'is laminated on the pre-coat layer B1 to prevent coating defects such as pinholes. And may be omitted.

The third step is to fill a caulking gun with a high-viscosity sealant of the same material as the above-mentioned sealant that has reached a predetermined viscosity after a certain period of time after vulcanization, and using this caulking gun, The sealing agent is injected into the overlapping step portion 3 or the concrete seam 3a from the top of the pre-coated layer B1, and the sealing agent is laminated thicker on the upper surface of the rivet 2 and near the periphery thereof. The main coating layer B2 is laminated.

The sealing agent used in the third step is exactly the same as that used in the second step and the fourth step described below, but a mixture containing a little vulcanizing agent is used. Is desirable. This is because if the vulcanizing agent is too much, it will solidify and provide sufficient strength against leakage fluid pressure.However, if the vulcanizing agent is mixed in more than necessary, the elasticity, adhesion and tear strength will decrease. Caution must be taken.

Further, this sealing agent is used after a certain period of time has passed after vulcanization and a predetermined viscosity has been reached. If it has a predetermined viscosity, it can be applied and adhered thickly, and the final coating layer B2 is applied and adhered to the collection.

In other words, the main purpose of the main coating layer B2 is to seal the leakage gap, and the thickness of the leakage gap is large enough to withstand the pressurization because the pressure in the fluid storage facility is applied to the leakage gap. It is necessary to have a thickness of 1 to 2 mm or more in order to prevent the generation of rust due to the infiltration of moisture. Should be laminated.

The main coating layer B2 includes a portion where there is a possibility that there is a leakage gap between the overlapped step portion 3, the concrete seam 3a, and the periphery of the head of the rivet 2, and the rivet 2 where rust is often generated.
May be applied only to the head or the like, but may be applied to other parts, that is, to the entire surface of the first coating layer B1, and further, if necessary, locally after the main coating layer B2 is solidified. A reinforcing coating layer B2 'may be applied so that the main coating layer B2 does not peel off. This reinforcing coating layer B2 'is composed of the first coating layer B1 and the main coating layer.
It is applied over the edge of B2 to prevent the main coating layer B2 from peeling off.

Then, after shaping the surface of the main coating layer B2 injected or laminated in the third step as a fourth step into a flat shape, the entire surface of the precoat layer B1 including the surface of the main coating layer B2 was used in the second step. The same sealing agent as above is applied to laminate the finishing layer B3.

The finishing layer B3 is stacked with a plurality of layers together with the pre-coating layer B1 or the main coating layer B2 to ensure sealing and increase the stacking thickness. Further, this finishing layer B3 also has an action of preventing peeling of the main coating layer B2, and therefore, it is applied not only on the upper surface of the locally applied main coating layer B2 but also on the entire surface of the pre-coat layer B1. It has become. Although not shown, when the main coating layer B2 is laminated on the entire surface of the first coating layer B1, the finishing layer B3 projects further outward from the main coating layer B2 and is applied to one surface of the steel material or the like. Good to do.

In order to flatten the surface of the main coating layer B2, a rubber spatula or a brush containing a solvent is used so that there is no extreme unevenness.

[Effect of the Invention] As described above, the present invention uses an encapsulant obtained by mixing a vulcanizing agent in liquid synthetic rubber thiocol, and when the encapsulant cures after vulcanization, elasticity, adhesion, and local movement It is possible to provide a method for preventing leakage of a fluid storage facility that can perform sealing with excellent followability against cracks, and does not generate cracks or cracks that follow local deformation and strain.

Further, in the present invention, since the first coating layer B1 is applied before the main coating layer B2, the adhesion of the main coating layer B2 is ensured, and further, by further laminating the finishing layer B3, the final coating layer B3 is applied. Since the peeling of the fluid is prevented, it is possible to provide a method for preventing leakage of the fluid storage facility, which can prevent leakage for a long period of time.

Further, the method of the present invention uses the same sealing agent, but the sealing layer B1 and the finishing layer B3 in the second step and the fourth step have a relatively small amount of vulcanization, and have a long post-vulcanization length. By using in a state of high fluidity without elapse of time, the sealing agent can be easily applied with a brush or the like, and application in which an application failure portion such as a pinhole is unlikely to occur, and the final coating layer B2 After vulcanization, a certain viscosity is passed, and it is applied with a thick fluid with low fluidity, so workability is good, the sealing effect is reliable, and a method of preventing leakage of fluid storage equipment that can be kept for a long time Can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of a main part of a fluid storage facility according to the present invention in which a leak prevention method is implemented, FIG. 2 is a cross-sectional view showing a main part of another embodiment, and FIGS. FIG. 1-steel material, 2-rivet, 3-superposition step, 3a-seam, A
~ Cleaning surface, B1 ~ First coating layer, B2 ~ Main coating layer, B3 ~ Finishing layer

Claims (1)

(57) [Claims] 1. As a first step, a portion around a polymerization step portion 3 including two rivets of steel plates 1, 1 constituting a fluid storage facility;
Alternatively, the periphery of the concrete seam 3a is cleaned to form a cleaning surface A from which deposits such as oil and dust have been removed. As a second step, a vulcanizing agent is mixed into the liquid synthetic rubber thiochol over the entire surface of the cleaning surface A. Immediately after the sealing agent
As a third step, a caulking gun is filled with a high-viscosity sealing agent of the same material as the above-mentioned sealing agent, which has a predetermined viscosity after a certain period of time after vulcanization, and this caulking gun is used. Then, from the top of the pre-coating layer B1 applied in the previous step, the sealing agent is injected into the polymerization step portion 3 or the concrete seam 3a, and the sealing agent is further poured on the upper surface of the head of the rivet 2 and near the periphery thereof. The final coating layer B2 is laminated thickly, and as a fourth step, the surface of the main coating layer B2 injected or laminated in the third step is shaped into a flat shape, and then the surface including the surface of the main coating layer B2 is formed. A method for preventing leakage of a fluid storage facility, wherein the same sealing agent as used in the second step is applied to the entire surface of the coating layer B1 to laminate the finishing layer B3.