JP2012211652A - Oil leakage part sealing construction method and oil leakage part sealing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil leakage part sealing construction method by which the sealing of a part of oil leakage occurring in a flange part or the like can be reliably executed without stopping oil flow and irrespective of the extent of high or low temperature level of ambient air.SOLUTION: The oil leakage part sealing construction method includes: a step of cleaning the flange part having the part of oil leakage and exposing the base surface of the part; a step of degreasing and cleaning the exposed part; a step of applying a primer agent for anticorrosion; a step of attaching filler so as to surround the part of oil leakage; a step of applying an epoxy resin type sealing agent having a short curing time even at a low temperature, curing the epoxy resin sealing agent to seal the part of oil leakage and, at the same time, attaching the filler to a sealing part, too; a step of smoothly shaping and curing a total attachment shape of the filler so as to cover the flange part and aligning an external form; a step of alternately covering the outer circumference of the fillers whose external form is aligned with an epoxy resin agent having a curing time larger than that of the epoxy resin sealing agent and glass wool to form a plurality of covering layers; and a step of performing finishing painting after curing the plurality of covering layers.

Description

  The present invention relates to an oil leakage location sealing construction method and an oil leakage location sealing structure, for example, sealing of an oil leakage location in a flange portion or the like which is one of oil pipeline components, and an oil flow in a pipeline. The present invention relates to an oil leakage location sealing construction method and an oil leakage location sealing structure that can be reliably executed regardless of whether the outside air temperature is high or low.

  As this type of oil leakage location sealing construction method, the applicant of the present application cleans the entire flange including the pipe joint flange coupling bolt that leaks oil first, exposes the ground by cleansing, and degreases the location.・ After cleaning, a filler is attached so as to surround the oil leakage portion, and the attached shape of the entire flange of the attached matter is smoothly formed and quickly cured, and then the entire surface of the attached shaped matter is resin adhesive and glass. An oil leakage location sealing construction method is proposed in which a plurality of layers are formed by alternately covering wool, and the plurality of coating layers are cured, and then finish-coated (Patent Document 1). ).

  In addition, the filler is attached from a place where there is no oil leakage. At the oil leakage place, the leaked oil is absorbed by wiping the leaked oil with a porous packing, and then the oil is quickly filled with the filler. A method to do this is also proposed.

  Also, as a repairing technique for damaged parts of metal pipes, masking tape, fiber tape, repair materials mainly composed of epoxy resin and metal pipes set with metal wires are used. After wrapping it with a fiber tape and wrapping it multiple times while applying the repair material, wrap the metal wire around the surface of the wound fiber tape multiple times, and then apply the repair material on the surface to cure the repair material There has been proposed a method for repairing a damaged portion of a metal pipe configured to repair a damaged portion caused by corrosion, wear, etc. of metal piping by forming a cured product on the metal pipe around the hole (Patent Document) 2).

JP-A-2005-140251 JP 2000-55288 A

  However, in the oil leakage location sealing structure described above, in the case of the oil leakage location sealing construction method of Patent Document 1, the oil leakage location of the flange portion at a time when the ambient temperature of the construction location is relatively high, such as in the spring and autumn, summer. Sealing can be performed without problems, but during low temperature periods such as winter (eg, ambient temperatures of 5 ° C, 0 ° C, etc.), it takes time to cure the filler, so oil leaks from the filler before curing. The oil leakage cannot be suppressed. Moreover, since the porous packing cannot sufficiently exhibit the oil absorption function in the low temperature period, the oil leakage cannot be suppressed, and it cannot be employed for the oil leakage location sealing construction of the flange portion.

  Moreover, in the case of the repair method of a damaged part of a metal pipe in Patent Document 2, as a repair material, a masking tape, a fiber tape, a repair material mainly composed of an epoxy resin and a metal wire are used, and particularly a metal wire is repaired. Since it includes a process of winding multiple times around the location, depending on the pipe shape of the repair location and the surrounding environment, it may be difficult to wind the metal wire, the workability will be poor, and sufficient damage may not be repaired. It is estimated to be.

  Therefore, the present invention is based on the technology of the oil leakage point sealing construction method disclosed in Patent Document 1 above, and seals the oil leakage points generated in the flanges and the like that connect the oil pipes. An object is to realize and provide an oil leakage location sealing construction method and an oil leakage location sealing structure that can be reliably executed regardless of whether the outside air temperature is high or low without stopping.

  The present invention is an oil leakage location sealing method for sealing an oil leakage location where an oil leak has occurred in an oil pipeline component through which oil flows, and the oil leakage location and its surrounding oil pipeline components are cleaned. , A step of exposing the skin by cleansing, a step of degreasing and cleaning the exposed portion, a step of applying an anticorrosive primer agent to the oil leakage location and its surrounding oil pipeline components, and an oil leakage location The process of attaching the filler so as to surround, and applying an epoxy resin sealant with a short curing time even at a low temperature to the oil leakage location and curing it to seal the oil leakage location, and also apply the filler to the sealing portion Uses the process of adhering, the process of shaping the entire adhering shape of the adhering filler smoothly and curing it to adjust the outer shape, and the epoxy resin agent and glass wool that have a slower curing time than the epoxy resin sealant And alternately covering multiple Forming a covering layer, after a plurality of coating layers is cured, and most important, comprising the steps of finishing paint, the.

  According to the first aspect of the present invention, in particular, an epoxy resin-based sealant having a short initial curing time is used at a low temperature in the oil leakage portion for sealing the oil leakage portion generated in the oil pipeline component through which oil flows. So that the oil flow in the pipe line is not stopped and the outside air temperature is high or low, that is, in the winter when the outside temperature is low, during the summer when the outside temperature is high, and in the spring and autumn seasons. However, as in the conventional example, it can be carried out reliably without using masking tape or metal wire, and the oil pipe line components are protected against corrosion, and the appearance is good and durable. It is possible to realize and provide an oil leakage point sealing construction method capable of simply obtaining an oil leakage point sealing structure.

  According to the second aspect of the present invention, the epoxy resin-based sealing agent is based on a constitution in which a bisphenol F type epoxy resin is used as the present agent, and an epoxy resin-based adhesive containing polythiol and a tertiary amine is used as the curing agent. It is possible to realize and provide an oil leakage location sealing construction method that exhibits the same effect as that of the invention described in Item 1.

  According to invention of Claim 3, bisphenol A type epoxy resin as this agent whose curing time is slower than an epoxy resin-based sealant as an epoxy resin agent, and polythiol, polyamidoamine, dimethylaminomethyl, phenol, and silica as a curing agent. It is possible to realize and provide an oil leakage location sealing construction method that exhibits the same effect as that of the first and second aspects of the invention based on the configuration using the epoxy resin adhesive that is included.

  According to a fourth aspect of the present invention, the method according to any one of the first to third aspects of the present invention includes a step of performing a finish coating after the plurality of coating layers are cured after the step of forming the plurality of coating layers. It is possible to realize and provide an oil leakage location sealing construction method that exhibits the same effect as the present invention.

  According to the invention of claim 5, cleaning, cleansing, degreasing and washing, coating formation of a primer layer for anticorrosion, sealing of the oil leakage portion of the flange portion with an epoxy resin sealant, filling to the outer periphery of the flange portion Through a series of processes including adhesion of material, shaping of the adhered filler, formation of a coating layer consisting of multiple layers using epoxy resin and glass wool on the outer periphery of the shaped area, and formation of a paint layer As in the conventional example, without using masking tape or metal wire, the flange part is protected against corrosion, and the oil leaking part is securely sealed, and the appearance is good and the durability is excellent. The oil leakage point sealing construction method according to claim 1, wherein the sealing structure can be obtained simply, and can be provided.

  According to the sixth aspect of the present invention, the oil agent component that has oil leakage and has an oil leakage location, an anticorrosion primer layer, and an epoxy resin-based sealant layer that is sealed by the oil leakage location P , The layer of the filler, the epoxy resin agent formed on the outer peripheral area of the shaped filler, the coating layer made of glass wool, and the paint layer are formed, so that the oil pipe line components are protected against corrosion, and the oil leakage location In addition, it is possible to realize and provide an oil leakage location sealing structure that has a good appearance and excellent durability.

  According to the seventh aspect of the invention, the epoxy resin-based sealing agent is based on a constitution in which a bisphenol F type epoxy resin is used as the present agent, and an epoxy resin-based adhesive containing a polythiol and a tertiary amine is used as the curing agent. The oil leakage location sealing structure that exhibits the same effect as that of the invention described in Item 6 can be realized and provided.

  According to the eighth aspect of the present invention, the epoxy resin agent is bisphenol A type epoxy resin having a slower curing time than the epoxy resin sealant, and the curing agent is polythiol, polyamidoamine, dimethylaminomethyl, phenol, silica. An oil leakage location sealing structure having the same effects as those of the inventions according to claims 6 and 7 can be realized and provided on the basis of a configuration using an epoxy resin-based adhesive.

  According to invention of Claim 9, it has the structure which has a finish coating layer which covers the outer periphery of the coating layer which laminated | stacked the said epoxy resin agent and glass wool alternately, Oil leakage location sealing structure of Claim 6 thru | or 8 Can be realized and provided.

  According to the invention of claim 10, the primer layer for anticorrosion, the layer of the epoxy resin sealant that seals the oil leakage point P, and the filling with respect to the flange portion where oil flows and has the oil leakage point Since the layer of material, the epoxy resin agent formed on the outer peripheral area of the shaped filler, the coating layer made of glass wool, and the coating layer are formed, the anti-corrosion of the flange part is aimed at and the oil leakage point is securely sealed Furthermore, it is possible to realize and provide the oil leakage location sealing structure according to claims 6 to 9, which has good appearance and excellent durability.

FIG. 1 is a flowchart showing a series of steps of a method for sealing an oil leakage location according to an embodiment of the present invention. FIG. 2: is explanatory drawing which shows the process which cleans and cleans the flange part in the oil leak location sealing construction method based on a present Example, and exposes the ground. FIG. 3 is an explanatory diagram illustrating a process of degreasing and cleaning an exposed portion in the method for sealing an oil leakage portion according to the present embodiment. FIG. 4 is an explanatory diagram showing a process of applying a corrosion-preventing primer to the oil leakage location and the surrounding flange portion in the oil leakage location sealing construction method according to the present embodiment. FIG. 5 is an explanatory view showing a step of attaching a filler so as to surround the oil leakage location in the flange portion in the oil leakage location sealing construction method according to the present embodiment. FIG. 6 applies an epoxy resin-based sealant to an oil leak location in the method for sealing an oil leak location according to the present embodiment, cures and seals the oil leak location, and also attaches a filler to the seal portion. It is explanatory drawing which shows the process made to do. FIG. 7 is an explanatory view showing a process for smoothing the outer shape of the attached filler in the oil leakage spot sealing construction method according to the present embodiment so as to cover the flange portion and curing it to adjust the outer shape. . FIG. 8 shows a step of forming a plurality of coating layers by alternately covering the outer periphery of the filler with the outer shape arranged in the oil leakage spot sealing construction method according to the present embodiment using an epoxy resin agent and glass wool. It is explanatory drawing shown. FIG. 9 is an explanatory view showing a process of finish coating after a plurality of coating layers are cured in the method for sealing an oil leakage location according to the present embodiment. FIG. 10 is a partially enlarged cross-sectional view showing a plurality of coating layers formed by the oil leakage location sealing method according to the present embodiment. FIG. 11 is a diagram showing the characteristics of the primer used in the oil leakage location sealing method according to the present example. FIG. 12 is a diagram showing the characteristics of the epoxy resin-based sealant used in the method for sealing an oil leakage location according to this example. FIG. 13: is a figure which shows the characteristic of the epoxy resin agent used for the oil leak location sealing construction method concerning a present Example.

  The present invention is an oil leakage that can reliably perform the sealing of the oil leakage location generated in the flange portion or the like that connects the oil pipes without stopping the oil flow in the pipeline and regardless of whether the outside air temperature is high or low. The purpose of providing a location sealing construction method is an oil pipeline component through which oil circulates, including an oil pipe, a pipe joint, a connecting bolt, and a flange portion having an oil leakage location, The step of exposing the background, the step of degreasing and washing the exposed portion, the step of applying a primer for anticorrosion to the oil leakage portion and the surrounding flange portion, and the oil leakage portion in the flange portion are surrounded. A step of attaching a filler as described above, and an epoxy resin system containing a bisphenol F type epoxy resin as a main agent having a short initial curing time even at a low temperature at an oil leakage location in the flange portion, a polythiol as a curing agent, and a tertiary amine A sealant is applied and cured to seal the oil leakage portion, and the filler is attached to the sealing portion, and the entire attached shape of the attached filler is covered with the flange portion. As a bisphenol A type epoxy resin, a curing agent that has a slower curing time than the epoxy resin-based sealing agent, with respect to the outer periphery of the filler that has been trimmed and cured, and to adjust the outer shape. A process of forming a plurality of coating layers by alternately coating an epoxy resin agent containing polythiol, polyamidoamine, dimethylaminomethyl, phenol, and silica and glass wool, and finishing coating after the plurality of coating layers are cured. And realizing the configuration.

  Hereinafter, an oil leakage location sealing construction method and an oil leakage location sealing structure according to an embodiment of the present invention will be described in detail.

  FIG. 1 is a flowchart showing a series of steps of an oil leakage location sealing construction method according to the present embodiment, and FIGS. 2 to 9 are explanatory diagrams of the respective steps.

  First, as shown in FIGS. 1 and 2, the oil leakage location sealing construction method according to the present embodiment is an oil conduit component through which oil flows, and includes an oil pipe 2, a pipe joint 3, and a connecting bolt 4. The process which cleans the flange part 1 which contains and has the oil leak location P is performed.

  That is, the oil leakage point P and the adhering matter in the vicinity thereof are removed, and the background is exposed by cleaning. At this time, if it is difficult to remove dirt or the like, it may be washed away with water, or swollen with an inorganic or organic solvent and then cleaned.

  Furthermore, the process which removes the existing coating of the flange part 1, rust, etc. using a manual work, an electric tool etc. (it is preferable to use a keren) is performed, and the process of exposing a metal background is performed.

  Next, as shown in FIGS. 1 and 3, a process of degreasing and cleaning the exposed portion is performed.

  That is, in the degreasing / cleaning step, oil, dust, and the like are degreased and washed in an area where the metal background and the surrounding area filled with a filler as described later are filled with an organic solvent.

  Next, as shown in FIG. 1 and FIG. 4, a step of applying a lipoxy primer for anticorrosion to the entire oil leakage point P and the surrounding flange portion 1 is performed, and the oil leakage point and the surrounding flange portion are performed. A primer agent layer 5 which is a corrosion-resistant thin film is formed on the entire metal surface.

  As the lipoxy primer, for example, trade name: Lipoxy R-806DA (Showa High Polymer Co., Ltd.) is used. The characteristics of this lipoxy primer are shown in FIG.

  Here, the lipoxy primer is based on lipoxy (a kind of modified epoxy resin, generally a thermosetting resin called vinyl ester resin, also known as epoxy acrylate resin), and adhesion between metal pipes and resin such as filler. Is an improvement. Since the primer agent is used for the purpose of improving the adhesiveness of the resin such as filler to the piping material, if the piping material is other than metal, select an appropriate primer material according to the material of the piping material. I can do it. Further, the primer agent is preferably applied in a range of about 10 cm in the longitudinal direction of the piping portion excluding the flange portion in order to securely bond the filler. If it is less than 5 cm, the adhesive strength of the filler is weak and the possibility of peeling off increases.

  Next, as shown in FIG. 1 and FIG. 5, the step of attaching the filler 6 to the entire flange portion 1 is performed so as to leave the oil leakage portion P in the flange portion 1 and surround the periphery thereof.

  As the filler 6, a filler (curing time, 20 to 30 minutes) in which an epoxy vinyl ester resin adhesive is mixed with cinnabar is used. At this time, the bolts or the like may be pre-filled with the epoxy resin sealant 7. Bolts and the like have a high possibility of oil leaking from the oil leakage point of the flange through the bolt through hole in the flange. Therefore, oil leakage can be prevented in advance by filling bolts or the like with the epoxy resin adhesive 7.

  Further, as shown in FIG. 1 and FIG. 6, after cleaning the oil content of the oil leakage point P, the oil leakage point P in the flange portion 1 is a bisphenol F type epoxy resin, a curing agent as a main agent having a short initial curing time even at a low temperature. A step of applying an epoxy resin-based sealant 7 containing polythiol and tertiary amine and curing it to seal the oil leakage location P and to attach the filler 6 so as to cover the sealing portion.

  As the epoxy resin-based sealant 7, for example, trade name: F60, F-Tech Co., Ltd. is used. FIG. 12 shows characteristics of the epoxy resin sealant 7 (F-60) relating to the curing time in winter, spring and autumn, and summer. So far, there has been no epoxy resin adhesive that has flame retardancy, heat resistance, and corrosion resistance, and has a short initial curing time such that it has practical strength in 30 minutes in winter (5 ° C.). The construction in winter is difficult because oil leaks before, and the use of the epoxy resin-based sealant 7 dramatically improves the workability.

  Next, as shown in FIGS. 1 and 7, the entire adhering shape of the filler material 6 adhering to the outer periphery of the entire flange portion 1 is smoothly shaped so as to cover the entire flange portion 1. And curing the outer shape. By adjusting the outer shape, the adhesion between the epoxy resin agent 8 in the next step and the glass wool 9 is improved.

  Next, as shown in FIG. 1 and FIG. 8, bisphenol A type epoxy resin as a main agent having a slower curing time than the epoxy resin-based sealing agent 7 on the outer periphery of the filler 6 whose outer shape is adjusted, An epoxy resin agent 8 containing polythiol, polyamidoamine, dimethylaminomethyl, phenol, and silica is used as an agent, and glass wool 9 is coated alternately to form a plurality of coating layers 10 (a total of seven layers in this embodiment). A process of forming is performed. Since the epoxy resin agent 8 has a lower viscosity than the epoxy resin sealant 7, it has excellent permeability to glass wool. As the epoxy resin agent 8, for example, trade name: F300, F-Tech Co., Ltd. is used. FIG. 13 shows the characteristics of the epoxy resin agent 8 (F-300) relating to the curing time in winter, spring and autumn, and summer. As the epoxy resin agent 8, a saturated polyester resin or the like may be used as an epoxy resin vinyl ester resin adhesive or a resin adhesive as long as it has heat resistance, oil resistance, and elasticity.

  The covering layer 10 is formed by first applying an epoxy resin agent 8 to form an adhesive layer 8a as a first layer, and laying a glass wool layer 9a as a second layer thereon. Thereby, the epoxy resin agent 8 easily penetrates into the glass wool layer 9a.

  Next, similarly, an adhesive layer 8b is provided as a third layer, and a glass wool layer 9b is provided thereon as a fourth layer.

  Similarly, an adhesive layer 8c is provided as a fifth layer, and a glass wool layer 9c is provided as a sixth layer thereon. Further, after providing an adhesive layer 8d as a seventh layer on the same as described above, the entire coating layer 10 is cured.

Next, as shown in FIG. 1 and FIG. 9, a well-known paint usually used in this technical field is applied to the surface of the uppermost layer (seventh layer) of the coating layer 10 to form a finish layer 11. The process is performed. At this time, it is preferable to use a paint having the same color tone as that of the flange portion 1.
However, this finish coating step is not an essential component in the present invention, and whether or not the finish coating is performed is free. In the case of performing finish coating, after the step of forming the plurality of coating layers, the finish coating is performed after the plurality of coating layers are cured.

  Here, in this finishing step, an example in which coating is performed on the adhesive layer 8d provided last is given. However, a paint is applied to the sixth glass wool layer 9c before covering the adhesive layer 8d. You may make it paint.

  Since the finish coating is performed for the purpose of protecting the glass wool layer 9c and adjusting the beauty, it does not have to be applied to a place where there are few external factors due to sunlight, rain, sunlight, etc., such as indoors, or where there is no problem with the beauty. .

  FIG. 10 shows an enlarged part of the entire layer structure in the flange portion 1 formed by a series of processes in this manner.

  The covering layer 10 is intended to protect the leak sealing construction site from external factors such as physical contact and wind and rain sunlight, and has a seven-layer structure depending on the situation of the construction site. It goes without saying that the number of layers can be various embodiments, such as a five-layer or nine-layer structure.

  According to the present embodiment, the sealing of the oil leakage location P generated in the flange portion 1 to which the oil pipe 2 is connected is sealed at the oil leakage location P in the flange portion 1 with a short initial curing time even at a low temperature. So that the oil flow in the pipeline is not stopped and the outside air temperature is high or low, that is, the winter where the outside temperature is low, the summer where the outside temperature is high, Regardless of whether it is spring or autumn, and as in the prior art, it is possible to realize and provide an oil leakage location sealing construction method that can be reliably executed without using a masking tape or a metal wire.

  In addition, according to the present embodiment, cleaning, cleansing, degreasing and washing, coating formation of the primer layer 5 for anticorrosion, sealing of the oil leakage portion P with the epoxy resin-based sealant 7, and filling of the flange portion 1 outer periphery Adhesion of the material 6, shaping of the adhered filler 6, formation of a coating layer 10 composed of a plurality of layers using the epoxy resin agent 8 and glass wool 9 on the outer periphery of the shaped region, By the series of steps of formation, the flange portion 1 is protected from corrosion, and the oil leakage point P is reliably sealed, and the oil leakage point sealing structure having a good appearance and excellent durability is simply obtained. It is possible to realize and provide an oil leakage location sealing construction method that can be used.

  The oil leakage point sealing construction method of the present invention may be applied to the oil leakage point of the flange portion as described above, or there is a risk of leaking oil at a connection point between oil-circulating pipes or oil-filled equipment. It can be easily and easily applied to substations, hydropower facilities, and general facilities without worrying about changes in the outside temperature depending on the season or region. In particular, in equipment where it is difficult to stop the equipment and drain the oil at the leaked location, it is not necessary to stop the equipment.

DESCRIPTION OF SYMBOLS 1 Flange part 2 Oil pipe 3 Pipe joint 4 Connection bolt 5 Primer layer 6 Filler 7 Epoxy resin-based sealant 8 Epoxy resin agent 8a Adhesive layer 8b Adhesive layer 8c Adhesive layer 8d Adhesive layer 9 Glass wool 9a Glass Wool layer 9b Glass wool layer 9c Glass wool layer 10 Coating layer 11 Paint layer

Claims (10)

An oil leakage location sealing method for sealing an oil leakage location where an oil leak has occurred in an oil pipeline component through which oil circulates,
A step of cleaning the oil leakage spot and the surrounding oil pipe line components, exposing the background by cleansing;
A process of degreasing and cleaning the exposed parts;
A step of applying a primer agent to the oil leakage location and the surrounding oil pipeline components;
Leaving an oil leakage spot and attaching a filler so as to surround it; and
After cleaning the oil content at the oil leak location, apply an epoxy resin sealant with a short initial curing time even at low temperatures, cure and seal the oil leak location, and attach the filler so as to cover the sealing portion Process,
Smoothly shaping and adhering the entire adhering shape of the adhering filler, and adjusting the outer shape;
A step of forming a plurality of coating layers by alternately using an epoxy resin agent and glass wool having a slower curing time than the epoxy resin-based sealant; and
Oil leakage location sealing construction method characterized by having.   The oil leakage point sealing construction method according to claim 1, wherein the epoxy resin-based sealant includes a bisphenol F type epoxy resin, polythiol as a curing agent, and a tertiary amine.   The oil leakage location sealing method according to claim 1 or 2, wherein the epoxy resin agent is a bisphenol A type epoxy resin.   The oil leakage point sealing method according to claim 1, further comprising a step of finish-coating after the plurality of coating layers are cured after the step of forming the plurality of coating layers.   The oil leakage location sealing method according to claim 1, wherein the oil leakage location is a flange portion. An oil leakage location sealing structure that seals an oil leakage location where oil leakage has occurred in an oil pipeline component through which oil flows,
A primer layer for anticorrosion applied to the oil leakage location and the surrounding oil pipeline components that have been cleaned, exposed to the ground by keren, and degreased and washed,
An epoxy resin-based sealant layer with a short curing time for sealing the oil leakage point,
A filler layer covering the entire outer periphery of the epoxy resin-based sealant layer and the primer agent layer, and having a smooth outer shape;
A coating layer in which an epoxy resin agent having a slower curing time than the epoxy resin-based sealant covering the entire outer periphery of the filler layer and glass wool are alternately laminated;
Oil leakage location sealing structure characterized by having.   7. The oil leakage point sealing structure according to claim 6, wherein the epoxy resin-based sealing agent includes a bisphenol F type epoxy resin, polythiol as a curing agent, and a tertiary amine.   The oil leakage location sealing structure according to claim 6 or 7, wherein the epoxy resin agent is a bisphenol A type epoxy resin.   9. The oil leakage point sealing structure according to claim 6, further comprising a finish coating layer covering an outer periphery of a coating layer in which the epoxy resin agent and glass wool are alternately laminated.   The oil leakage location sealing structure according to claim 6, wherein the oil leakage location is a flange portion.

Images