JPH07187287A - Lining construction method for tank - Google Patents

Abstract

PURPOSE:To firmly bond a tank internal wall and lining member even when a lining member with a poor adhesion is used, and prevent the lining member from peeling even after a long period of use CONSTITUTION:A mesh-form supporting member 1 is brought into contact with the inner peripheral surface of a tank 2, and is welded on the internal wall of a tank main body 2 by welding. Then, the surface of a lining member 4 on which an anchor part 5 is formed is brought into contact with the internal side of the mesh, and adjoined lining members are welded by plastic welding, and the whole body is airtightly formed. Then, the edge of the tank 2 and the edge of the lining member 4 are sealed by a sealing material while remaining a hole for vacuumization and a hole from which an adherent filler is filled. Then, a vaccumization is performed by closing the hole for the injection of a filler, and when the degree of the vacuumization has reached a specified degree, an adherent filler 6 is injected, and filled to every corner between the tank 2 and lining member 4. Then, the adherent filler 6 is cured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of lining a tank with a plastic lining.

[0002]

2. Description of the Related Art Conventionally, a lining member made of a plastic material is attached to an inner wall of a metal tank body for the purpose of preventing corrosion of the metal tank body and keeping the contents warm.

Conventionally, as a lining method for such a tank, the inner wall surface of the metal tank is roughened by sandblasting or the like, and the lining member is attached thereon by using an appropriate adhesive agent depending on the kind of the lining member. At the same time, the abutting portion of the lining member is welded and hermetically sealed.

However, such a conventional method has a problem that the adhesive strength of the lining member is weak and peeling occurs between the tank body and the lining member during long-term use.

In particular, a fluorine-based plastic such as PVDF (polyvinylidene fluoride) has excellent chemical resistance and has excellent properties as a lining member. On the other hand, a suitable adhesive is used. However, there is a drawback that such a construction method cannot be adopted.

[0006]

As described above, there is known a method of bonding a lining member made of plastic or the like to the inner surface of the tank body with an adhesive.
When it is used for a long period of time, there is a problem that peeling occurs between the tank body and the lining member.

Fluorine-based plastics such as PVDF have excellent chemical resistance and are suitable for lining members, but there is no suitable adhesive for sticking a fluorine-based resin to such a construction method. There was a difficulty that I could not collect.

The present invention has been made to solve such a conventional problem, and does not cause the problem of peeling even if the inner wall of the tank and the lining member are firmly adhered and used for a long period of time. An object of the present invention is to provide a tank lining construction method that can use a fluorine-based lining member having poor adhesion such as PVDF.

[0009]

According to the tank lining method of the present invention, a supporting member serving as an anchor is fixed to a required position on the inner peripheral surface of the tank body to be lined,
Between the tank body and the lining member, a lining member having a large number of anchor portions integrally formed on one surface is disposed on the inner peripheral surface of the tank body to which the support member is attached, with the anchor portion inside. It is characterized in that it is filled with an adhesive filler.

In the present invention, a wire mesh made of coarsely woven metal wire is suitable as a supporting member fixed to a desired position on the inner peripheral surface of the tank body to be lined. When such a wire net is used as the support member, as shown in FIG. 2, the wire net 1 is arranged on the inner surface of the tank 2 to be lined and the required portion 1a is welded to the inner surface of the tank 2. Use by fixing. Further, instead of such a wire mesh, as shown in FIG. 3, a large number of bolt-shaped support members 3 may be attached to required positions on the inner surface of the tank 2. In this case, the bolt-shaped support member 3 is fixed to a required position on the inner surface of the tank 2 by welding, or a bolt hole is bored in the inner surface of the tank 2, and the bolt is floated with the head of the bolt screwed into the bolt hole. You can take the method of doing. .

Since these supporting members form a space for filling the adhesive filler between the tank body and the lining member and fix the filler on the inner surface of the tank body, the space generated by this is formed. Is less than 10 mm is sufficient.

The lining member used in the present invention is made of rubber / plastic material and integrally molded on a flat plate, but it may be formed in a spherical shape or any other shape in advance according to the shape of the inner surface of the tank. Is also possible. A large number of anchor portions are formed on one surface of the lining member main body used in the present invention by integral molding using a mold or the like.
As the shape of the anchor portion, there are an inverted figure-eight projection portion as shown in FIG. 4 and a structure in which a reinforcing girder is provided between the inverted figure eight projection portions as shown in FIG. Although it is desirable in terms of formability and effect, as shown in FIG. 6, it may be a columnar shape such as a bolt shape having an enlarged portion at the head.

As the adhesive filler used in the present invention, an epoxy resin or a mixture of an epoxy resin and an inorganic filler is suitable, but a foaming filler may be used if necessary. Good. When a foamable filler is used, this packed layer functions as a heat insulating layer and is particularly suitable for lining a reaction kettle for heating the contents of the tank.

Before filling such an adhesive filler, the edge between the tank body and the lining member and the abutting portion of the lining member are hermetically sealed except for the exhaust hole and the filler injection hole. While the vacuum is drawn from or after the vacuum is drawn, the adhesive filler is filled from the filler injection hole. As a result, the adhesive filler is quickly filled in every corner between the tank body and the lining member.

[0015]

In the lining portion of the tank formed according to the present invention, the tank-side support member forms a gap for filling the adhesive filler with the lining member, and
After the adhesive filler solidifies, it acts to fix the adhesive filler layer to the tank body. On the other hand, the anchor portion on the side of the lining member is also embedded in the adhesive filler, and after the adhesive filler is solidified, it acts to fix the lining member to the adhesive filler layer.

Therefore, the inner peripheral surface of the tank body and the lining member are firmly bonded to each other through the adhesive filler layer, and there is no risk of peeling even after a long period of time. Further, even when a lining member made of plastic having poor adhesiveness such as a fluororesin is used, the inner peripheral surface of the tank body and the lining member are provided with a support member and a lining on the inner surface of the tank through an adhesive filler layer. Since the members are mechanically connected by the anchor member, they do not peel off.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial cross-sectional view for explaining an embodiment of the present invention. A wire mesh-like support member 1 is stretched over the entire inner peripheral surface of the tank 2 main body as shown in FIG. The required point 1a is fixed by welding. Further, in FIG. 1, reference numeral 4 is a lining member made of PVDF, and one side thereof has an inverted eight-shaped anchor portion 5 protruding therefrom. The anchor portion 5 and the main body of the lining member 4 are integrally formed by die molding.

Next, the lining method of this embodiment will be described. First, the wire mesh support member 1 is formed on the inner peripheral surface of the tank 2.
Are abutted. At this time, the wire mesh support members 1 do not necessarily need to be continuous, and a plurality of small members may be arranged adjacent to each other. Next, this wire mesh is fixed to the inner wall of the tank 2 main body by welding. After this,
The lining member is brought into contact with the inside of the wire mesh. Then, the gaps between the lining members are welded by plastic welding to form the whole as a secret. After that, the edge of the tank and the edge of the lining member are sealed with a sealing material, leaving only the hole for evacuation and the hole for filling the adhesive filler. After that, the hole for injecting the filler is closed to perform vacuuming, and when the predetermined vacuum degree is reached, the adhesive filler 6 is injected. In this way, the filler 6 is filled evenly in every corner between the inner wall of the tank 2 and the lining member 4.

In such a construction method, the wire mesh support member 1 fixed to the tank 2 maintains a space for filling the adhesive filler between the tank 2 and the lining member 4, and at the same time, the adhesive filling is performed. After the agent solidifies, it acts to fix the adhesive filler layer to the tank body. Further, the anchor portion 5 of the lining member 4 is embedded in the adhesive filler, so that the lining member has a function of being fixed to the adhesive filler layer after the adhesive filler is solidified.

Therefore, according to the above-mentioned lining method, the inner peripheral surface of the tank main body and the lining member are firmly bonded via the adhesive filler layer, and there is no fear of peeling even after a long period of time. Further, even when a lining member made of plastic having poor adhesiveness such as a fluororesin is used, the inner peripheral surface of the tank body and the lining member are provided with a support member and a lining on the inner surface of the tank through an adhesive filler layer. Since the members are mechanically connected by the anchor member, they do not peel off.

In the above embodiment, the wire mesh and the lining member are described by taking as an example those in which small parts are arranged and adjacent or welded between them, but the present invention is limited to such an embodiment. Not a thing. That is, in the case of a small tank, the wire mesh support member and the lining member are formed in a predetermined shape in advance, and this is arranged in the tank by the method described above, and the filler is placed between the tank and the lining member. May be filled.

In the above embodiment, the wire mesh support member fixed to the inner surface of the tank by welding is used as the support member for strengthening the joint between the inner surface of the tank and the adhesive filler.
Without being limited to this, as shown in FIG. 3, the same effect can be obtained even if a large number of bolt-shaped support members 3 are attached to the inner wall of the tank. In this case, a method in which a large number of bolt holes are bored in the inner surface of the tank and bolts are screwed into the bolt holes to be fixed, or a bolt-shaped support member is fixed to the inner surface of the tank by welding is considered.

As the anchor portion formed on one surface of the lining member, in addition to the inverted figure-eight projection structure shown in FIG. 4, reinforcement is provided between the inverted figure-eight projection parts shown in FIG. It may have a structure in which a girder is passed over, or may have a columnar shape having an enlarged portion at the head like the bolt shape shown in FIG.

[0025]

As described above, according to the present invention,
Since the tank and the lining member are securely fixed by the anchor effect via the adhesive filler, excellent adhesive strength can be obtained even when a lining member having poor adhesiveness such as PVDF is used.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view illustrating an embodiment of the present invention.

FIG. 2 is a perspective view showing an arrangement state of a wire mesh support member and a welding spot.

FIG. 3 is a view showing another example of the support member according to the present invention attached to the inner surface of the tank.

FIG. 4 is a diagram illustrating the shape of an anchor portion of a lining member according to the present invention.

FIG. 5 is a diagram illustrating the shape of an anchor portion of a lining member according to the present invention.

FIG. 6 is a diagram illustrating the shape of an anchor portion of a lining member according to the present invention.

[Explanation of symbols]

 1 ………… Wire mesh support member 2 ……… Tank 3 ……… Bolt support member 4 ……… Lining member 5 ……… Anchor part 6 ……… Adhesive filler

Claims (4)

[Claims] 1. A support member that acts as an anchor is fixed to a required portion of an inner peripheral surface of the tank main body to be lined, and a large number of anchor portions are provided on one surface of the inner peripheral surface of the tank main body to which the support member is attached. A lining construction method for a tank, characterized in that an integrally formed lining member is arranged with the anchor portion inside, and an adhesive filler is filled between the tank body and the lining member. 2. A wire mesh-like support member is stretched around the inner peripheral surface of the tank main body to be lined, and a required portion of the wire mesh-like support member is welded to the inner peripheral surface of the tank main body. A lining member having a large number of anchor portions integrally formed on one surface is disposed on the inner peripheral surface of the tank main body to which a supporting member is attached, with the anchor portion inside, and between the tank main body and the lining member. A tank lining method characterized by filling an adhesive filler. 3. When the adhesive filler is filled between the tank body and the lining member, the edge and the periphery between the tank body and the lining member are sealed airtight in advance except for the exhaust hole and the filler injection hole, The tank lining method according to claim 1 or 2, wherein the adhesive filling material is filled from the filling material injection hole while drawing a vacuum from the exhaust hole or after drawing a vacuum. 4. The anchor portion provided on one surface of the lining member is an inverted figure-eight projection portion integrally fixed to one surface of the lining member main body having a flat top portion. A method for lining a tank according to any one of 1 to 3.