JP2010065838A - Method for corrosion prevention in pipe installation structure and mounting frame of pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure more complete corrosion prevention in a mounting frame of a pipe, and to enable non-destructive inspection of a contact portion between the pipe and the mounting frame from outside even after pipe installation. <P>SOLUTION: The pipe installing structure 1 includes the pipe made of metal more precious than zinc, and the mounting frame for supporting thereof. A low-friction member 7 is arranged fixedly on the mounting frame 4 between the pipe 2 and the mounting frame 4. A corrosion prevention member 3a made of a zinc or zinc alloy plate is arranged between the pipe 2 and the low-friction member 7 so as to directly contact the pipe 2, and slide against the low-friction member 7. When the corrosion prevention member 3a is thermally expanded and contracted, the low-friction member 7 has such a sufficient low-friction coefficient that the corrosion prevention member 3a slides relative to the low-friction member 7. Between the low-friction member 7 and the mounting frame 4, a second corrosion prevention member 3b made of a zinc or zinc alloy may be arranged fixedly on the mounting frame 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pipe erection structure and a corrosion prevention method in a pipe gantry.

  Various types of indoor or outdoor metal pipes are supported and fixed by mounts arranged at predetermined intervals. Dust or water is likely to accumulate in the gap between the gantry and the pipe (capillary condensation), and corrosion is likely to proceed because it is difficult to dry. Furthermore, the rhythm caused by the thermal expansion and contraction of the piping itself due to the temperature change of the atmosphere or the transport fluid is unavoidable, and the corrosion products generated at the contact portion between the piping and the base are repeatedly peeled and regenerated, and the pipe and coating film are thinned. Promote speed.

  Therefore, as a method for preventing corrosion of a portion of the pipe that contacts the frame, for example, in Patent Document 1, an anticorrosive material composed of a corrosion-resistant resin and a stainless sheet is wound around the portion that contacts the pipe frame, and an adhesive and a stainless steel band The method of fixing and preventing corrosion is described.

Japanese Patent Laid-Open No. 11-315993

  However, in the conventional anticorrosion method, depending on the degree of rhythm caused by thermal expansion and contraction of the pipe itself, the anticorrosion material or the like may be displaced or detached, and it cannot be said that complete anticorrosion has been achieved. Further, in the anticorrosion method, the portion of the pipe that contacts the frame is covered with an anticorrosive material, and the anticorrosive material is fixed with an adhesive and a stainless steel band. Therefore, in order to inspect the contact portion between the frame and the pipe, It is necessary to remove the anticorrosion member fixed with the adhesive. In addition, since the anticorrosion member is fixed with an adhesive and a stainless steel band, there is a problem that it takes time to dry the adhesive and requires a construction time. Furthermore, since this anticorrosion method is not a sacrificial anticorrosive effect, but is rustproofed by a coating anticorrosive effect, if a gap occurs between the pipe and the anticorrosive member due to thermal expansion and contraction of the pipe itself or an initial construction failure, the gap portion Corrosion of the steel is particularly easy to progress.

  An object of the present invention is to provide a pipe erection structure and a corrosion prevention method for a gantry part of a pipe that can eliminate the above-described drawbacks of the prior art.

The present invention is a pipe erection structure including a metal pipe precious than zinc and a gantry supporting the pipe.
A low friction member is disposed and fixed on the frame between the pipe and the frame, and
Between the pipe and the low friction member, an anticorrosion member made of zinc or a zinc alloy plate is arranged so as to be in direct contact with the pipe and slidable with the low friction member,
The low friction member provides a piping construction structure characterized by having a low coefficient of friction that allows the anticorrosion member to slide relative to the low friction member when the pipe thermally expands and contracts. Is.

The present invention is a pipe erection structure including a metal pipe precious than zinc and a gantry supporting the pipe.
Between the pipe and the mount, a corrosion protection member made of zinc or a zinc alloy plate is arranged so as to be in direct contact with the pipe,
A low friction layer is provided on the surface of the anticorrosion member facing the gantry,
The low friction layer provides a pipe erection structure characterized in that the anticorrosion member is slidable with respect to the gantry when the pipe thermally expands and contracts.

In the present invention, the low friction member is arranged and fixed on the gantry between the pipe made of metal precious than zinc and the gantry supporting the pipe, and before or after the low friction member is arranged and fixed. A piping base in which an anticorrosion member made of zinc or a zinc alloy plate is disposed between the piping and the low friction member so as to be in direct contact with the piping and to be slidable with the low friction member. Anticorrosion method in the department,
In the base part of the pipe, the low-friction member having a low friction coefficient that allows the anti-corrosion member to slide relative to the low-friction member when the pipe thermally expands and contracts is used. An anticorrosion method is provided.

In addition, the present invention, between the pipe made of metal noble than zinc and the gantry supporting this, arranges the anticorrosive member made of zinc or zinc alloy plate so as to be in direct contact with the pipe,
Before or after arranging the anti-corrosion member, the anti-corrosion method of the anti-corrosion member in the pedestal portion of the pipe provided with a low friction layer on the surface facing the gantry,
As the low friction layer, there is provided a corrosion prevention method for a pipe gantry, wherein the anticorrosion member is slidable with respect to the gantry when the pipe thermally expands and contracts. is there.

  In the pipe erection structure of the present invention, a low friction member is interposed between the pipe and the gantry, and an anticorrosion member made of zinc or a zinc alloy plate is interposed between the pipe and the low friction member. Since it is arranged so as to be slidable with the low friction member, the anticorrosion material or the like is not shifted or detached even by the rhythm caused by the thermal expansion and contraction of the pipe, and extremely effective anticorrosion can be achieved. Further, since the anticorrosion member and the low friction member are interposed between the pipe and the base, the contact portion between the base and the pipe is observed from the outside without removing the anticorrosion material. It is possible to easily inspect after installing the pipe. In addition, the construction time can be shortened as compared with the conventional anticorrosion method in which the periphery of the pipe is covered with an anticorrosion member.

  Hereinafter, the piping construction structure of the present invention is explained based on the preferred embodiment, referring to drawings. FIG. 1 (a) shows a cross-sectional view of a first embodiment of the piping construction structure of the present invention. FIG.1 (b) is a top view of the piping construction structure shown to Fig.1 (a), FIG.1 (c) is a side view of the piping construction structure shown to Fig.1 (a).

  As shown in FIGS. 1A to 1C, the pipe erection structure 1a of the present embodiment includes a pipe 2 having a circular cross section and a gantry 4 that supports the pipe. The pipe 2 is made of metal, and various fluids such as liquid and gas flow through the pipe 2. A protective layer may be formed on the outer surface of the pipe 2 by painting or the like in order to prevent the metal from being exposed.

  The gantry 4 is made of metal, and its longitudinal section has a substantially I-beam shape, and includes a plate-like base part 4a, a support part 4b erected at the center in the width direction of the base part 4a, and There is provided a plate-like gantry 4c extending horizontally from the tip of the support 4b. The pipe 2 described above is disposed on the upper surface of the gantry 4c. The width of the gantry 4 c is larger than the diameter of the pipe 2. The gantry 4 c has a portion that extends to the left and right from the outermost part of the pipe 2. A pair of through holes (not shown) into which end portions of a U-shaped pressing member 5 (described later) serving as a fixture are inserted are provided in the extending portion.

  The pipe 2 is clamped from above by a U-shaped metal pressing member 5 opened downward, and is fixed to the upper surface of the gantry 4c. The pipe 2 is fixed to the gantry 4 at predetermined intervals. Both ends of the pressing member 5 are inserted into through holes (not shown) provided in the gantry 4c, and are screwed with nuts 51 on the lower surface side of the gantry 4c.

  Therefore, in the pipe erection structure 1a of the present embodiment, the anticorrosion member 3a (described later) and the low friction member 7 are disposed in this order between the pipe 2 and the upper surface of the gantry 4c from the pipe 2 side. It has one of the features. The low friction member 7 is fixed to the upper surface of the gantry 4c. As the low friction member 7, a member having a low friction coefficient sufficient to slide the anticorrosion member 3 a relative to the low friction member 7 when the anticorrosion member 3 a is thermally expanded and contracted is used. Specifically, as shown in FIG. 2, when a rhythm due to thermal expansion / contraction of the pipe 2 occurs due to a change in the outside air temperature, not the contact portion between the pipe 2 and the anticorrosion member 3 a, but the anticorrosion member 3 a is low. A low friction member 7 that causes sliding on the contact surface with the friction member 7 is used. For example, in the measurement method based on JIS-K-7125, the dynamic friction coefficient (μ) of the low friction member 7 for the anticorrosion member 3a is 0.3 or less, and the static friction coefficient for the anticorrosion member 3a is 0.4 or less. It is. Further, in order to easily cause sliding on the contact surface between the anticorrosion member 3 a and the low friction member 7, grease, lubricating oil, or the like may be applied between the anticorrosion member 3 a and the low friction member 7.

  Examples of such a low friction member 7 include polytetrafluoroethylene, polyacetal, polyamide, and high density polyethylene.

  As shown in FIG. 1B, the low friction member 7 has a rectangular shape in plan view. Although the thickness is not particularly limited, in general, by setting the thickness to 0.2 to 20 mm, it is possible to effectively prevent buckling even when stress generated due to thermal expansion and contraction of the pipe 2 is applied to the low friction member 7. The

  With respect to the width of the low friction member 7, as shown in the figure, the low friction member 7 is intended to fix not only the pipe 2 but also the low friction member 7 to the gantry 4 by the pressing member 5 as the fixture described above. Is made larger than the outer diameter of the pipe 2.

  The length of the low friction member 7 is equal to the length of the gantry 4c in the gantry 4 from the viewpoint of reducing the surface pressure due to the weight of the pipe 2 and reducing the amount of wear of the low friction member 7 and the anticorrosion member 3a. It is preferable that the length is longer than this.

  As described above, as shown in FIGS. 1A and 1C, the anticorrosion member 3 a is interposed between the pipe 2 and the low friction member 7. The anticorrosion member 3 a is arranged so as to be in direct contact with the pipe 2 and slidable with the low friction member 7. Here, “directly touching” means that the pipe 2 and the anticorrosion member 3a are in contact with the outer surface of the pipe 2 in a state where there are no inclusions therebetween. The outer surface of the pipe 2 means the exposed surface when the metal constituting the pipe 2 is exposed, and when the paint or plating is applied to the surface of the metal, the outer surface. Say. Further, in order to make the anticorrosion member 3a easily slide on the contact surface between the anticorrosion member 3a and the low friction member 7, the surface roughness of the surface of the anticorrosion member 3a facing the low friction member is set to Ra ≦ 1 μm. It is preferable that

  The anticorrosion member 3a is made of zinc or a zinc alloy. As zinc, for example, pure zinc having a purity of 99.9% by mass or more is used. As the zinc alloy, for example, an alloy containing 0.1 to 0.5% by mass of aluminum and 0.05 to 0.5% by mass of magnesium is preferably used. When a zinc alloy containing these metals is used, aluminum or magnesium helps to dissolve zinc uniformly, and the anticorrosion member 3a is uniformly dissolved. Further, the anode potential and the effective amount of electricity are improved.

  The anticorrosion member 3a may have a single layer structure composed only of zinc or a zinc alloy plate, or a layer composed of zinc or a zinc alloy plate and stainless steel, such as ZAP-SUS manufactured and sold by the applicant. It may have a composite structure with a layer composed of In the case of using a composite structure, it is necessary to arrange a layer made of zinc or a zinc alloy on the pipe 2 side.

  The anticorrosion member 3a has a rectangular shape in a plan view, and includes a thin material called a foil having a thickness of about 0.05 mm to a rigid plate material having a thickness of about 20 mm. When the pipe 2 undergoes large thermal expansion or contraction or when the corrosive environment such as the vicinity of the sea is severe, the thickness of the anticorrosion member 3a is 1 mm or more to prevent buckling of the anticorrosion member 3a due to thermal expansion and contraction. It is preferable from the viewpoint of lifetime.

  About the width | variety of the anticorrosion member 3a, as shown to Fig.1 (a), it is equivalent to the outer diameter of the piping 2, or slightly smaller than it. By setting the width of the anticorrosion member 3a to such a size, the anticorrosion member 3a can slide with respect to the low friction member 7 when the anticorrosion member 3a is thermally expanded and contracted. Therefore, unlike the low friction member 7 and the second anticorrosion member 3b (described later), the right and left side edges of the anticorrosion member 3a are not provided with holes for the U-shaped presser 5 to pass therethrough.

  The length of the anticorrosion member 3a is preferably equal to or longer than the length of the gantry 4c in the gantry 4. The reason for this is that there are many existing pipes that have rust, and it is necessary to prevent corrosion at least in the area having rust, and in the vicinity of the contact portion between the pipe 2 and the gantry 4c of the gantry 4, This is because the corrosive environment is severe, so that the pipe 2 needs to be at least equal to the length of the gantry 4c in order to effectively prevent corrosion.

  As shown in FIGS. 1A and 1C, a second anticorrosion member 3 b is disposed and fixed on the gantry 4 between the low friction member 7 and the gantry 4. The second anticorrosion member 3b is made of zinc or a zinc alloy, like the anticorrosion member 3a described above. About the material of the 2nd anti-corrosion member 3b, the description mentioned above regarding the material of the anti-corrosion member 3a is applied suitably.

  The second anticorrosion member 3b has a rectangular shape in a plan view like the anticorrosion member 3a described above, and is made of a thin plate having a thickness of about 0.05 mm called a foil and a rigid plate shape having a thickness of about 20 mm. Includes up to materials. The width of the second anticorrosion member 3b is larger than the diameter of the pipe 2 for the purpose of fixing to the gantry 4 by the pressing member 5 as the fixing tool described above. It is equivalent to the width or slightly smaller than that.

  The length of the anticorrosion member 3b is preferably the same as or longer than the length of the gantry 4c in the gantry 4 from the viewpoint that the entire surface of the gantry 4 can be anticorrosive.

  The pipe erection structure 1a having the above-described configuration fixes and arranges the low friction member 7 between the pipe 2 and the gantry 4, and further, between the pipe 2 and the low friction member 7, further, from zinc or a zinc alloy. The anticorrosion member 3 a is arranged so as to be in direct contact with the pipe 2 and slidable with the low friction member 7. The pipe 2 and the anticorrosion member 3a are pressed against each other by plastic deformation caused by the weight of the pipe 2 and the tightening force of the U-shaped pressing member 5, thereby suppressing movement between the two. When a rhythm due to thermal expansion / contraction of the pipe 2 occurs in this state, the anticorrosion member 3a moves with heat expansion and contraction together with the pipe 2 as shown in FIG. 2 due to plastic deformation of the anticorrosion member 3a. This occurs at the contact surface between the anticorrosion member 3a and the low friction member 7, not at the contact portion between the anticorrosion member 3a and the anticorrosion member 3a. For this reason, unlike the method described in Patent Document 1 which is a conventional anticorrosion method for a pipe gantry, the anticorrosive material and the like are not shifted or detached, and extremely effective anticorrosion can be achieved. Here, when the application object of the pipe erection structure 1a is an existing pipe, the pipe is corroded and the outer peripheral surface of the pipe has irregularities, so that the movement between the pipe 2 and the anticorrosion member 3a is further suppressed. Has been. On the other hand, when the pipe erection structure 1a is applied to a new pipe, the surface of the pipe 2 is roughened or a conductive adhesive or a conductive adhesive is applied between the pipe 2 and the anticorrosive member 3a. It is preferable to further suppress this movement. By performing these treatments on the existing piping, it becomes more effective in suppressing movement between the piping 2 and the anticorrosion member 3a. In addition, by adopting a configuration in which the anticorrosion member 3a and the low friction member 7 are interposed between the pipe 2 and the gantry 4, even if the pipe 2 is exposed to a wet environment, the pipe 2 is in contact with the pipe 2. Since the anticorrosion member 3a is preferentially corroded by the sacrificial anticorrosive effect to form a corrosion product, the corrosion of the pipe 2 is effectively prevented. In addition, the corrosion product adheres to the surface of the pipe 2 to cut off the pipe 2 and the atmosphere, thereby further preventing the pipe 2 from being anticorrosive (coating anticorrosive action), as well as by inhibiting the pipe 2. Anticorrosion. Moreover, since the entire periphery of the pipe 2 is not covered with the anticorrosion member, the contact portion between the pipe 2 and the mount 4 can be directly observed without removing the anticorrosion member. This greatly contributes to improvement in maintainability of the pipe 2. Moreover, since the 2nd anti-corrosion member 3b is arrange | positioned and fixed between the low friction member 7 and the mount part 4c of the mount frame 4, the upper surface of the mount part 4c is reliably corroded. Furthermore, it is possible to prevent corrosion over a wider range while leaving the contact portion between the pipe 2 and the gantry 4 inspectable without removing the corrosion protection member.

  In order to make the above-mentioned anticorrosive effect remarkably exhibited, the pipe 2 is made of a metal nobler than zinc, which is a metal contained in the anticorrosive member 3a and the second anticorrosive member 3b. Specifically, it is preferably made of steel, stainless steel or the like. As for the gantry 4, at least the gantry 4 c is preferably made of a metal nobler than zinc, like the pipe 2. Regarding the pressing member 5, it is preferable from the viewpoint of corrosion prevention of the pipe 2 that it is made of a metal that is equivalent to zinc or noble than zinc. Examples of such a metal include aluminum, an aluminum alloy, galvanized steel, and the like. Examples of the aluminum alloy include A1050.

  The construction method of the pipe laying structure 1a having the above configuration will be described below. A U-shaped pressing member 5 for fixing the pipe 2 that is nobler than zinc, the gantry 4 that supports the pipe 2, the pipe 2, the low friction member 7, and the second anticorrosion member 3b is prepared. When the pipe erection structure 1a is applied to a new pipe, it is preferable that the pipe 2 is subjected to a surface roughening treatment or a conductive adhesive or a conductive adhesive is applied. Apart from this, the length of the low-friction member 7 and the second anticorrosion member 3b processed to the same size as the upper surface of the gantry 4c of the gantry 4 is the same as the upper surface of the gantry 4c of the gantry 4. The anticorrosion member 3a whose width is processed to the same extent as that of the pipe 2 is prepared. As shown in FIGS. 1 (a) to 1 (c), the low friction member 7, the second anticorrosion member 3b, and the gantry 4 have end portions of U-shaped pressing members 5 at both side edges in the width direction. A through-hole for allowing 5 to penetrate is provided. Next, as shown in FIGS. 1 (a) and 1 (c), the anticorrosion member 3a is disposed so as to be in direct contact with the pipe 2, and the low friction member is disposed before or after the anticorrosion member 3a is disposed. 7 and the second anticorrosion member 3b are fixed together with the pipe 2 by a U-shaped pressing member 5.

  Next, the piping construction structure of 2nd, 3rd embodiment and 4th embodiment of this invention is demonstrated based on FIG. 3 thru | or FIG. About 2nd, 3rd, and 4th embodiment, a different point from 1st embodiment demonstrated previously is demonstrated, and the point which is not demonstrated in particular is the same as that of 1st embodiment, and is explained in full detail regarding 1st embodiment. The above explanations are applied as appropriate. 3 to 8, the same members as those in FIGS. 1 and 2 are denoted by the same reference numerals.

  As shown in FIGS. 3 (a) to 3 (c), the piping construction structure 1b of the second embodiment has a pair of U-shaped side edges on the low friction member 7 and the second anticorrosion member 3b. It is being fixed to the mount frame 4 by the shape fixing tools 6a and 6a. The U-shaped pressing member 5 fixes only the pipe 2. As shown in FIG. 3C, the fixture 6a is formed by bending an elongated rectangular metal plate into a U-shape, and the opening of the U-shape fixture 6a opened downward has a low friction. The upper surface of the member 7, the low friction member 7, the second anticorrosion member 3 b, and the front and rear end surfaces of the gantry 4 are arranged so as to contact each other. The fixture 6a is made of a metal that is equivalent to or more noble than zinc. Examples of such metals are as described above. In particular, aluminum or an aluminum alloy is a preferable material because it is excellent in bending workability and corrosion resistance. As the aluminum alloy, those described above can be used.

  Unlike the first embodiment, the low friction member 7 and the second anticorrosion member 3 b in the present embodiment have the same width as the outer diameter of the pipe 2. Unlike the first embodiment, the left and right side edges of the low friction member 7 and the second anticorrosion member 3b are not provided with holes for the U-shaped presser 5 to pass therethrough. As shown in FIG. 4, as in the first embodiment, in this embodiment, when a rhythm due to thermal expansion / contraction of the pipe 2 occurs due to a change in the outside air temperature, the pipe 2 and the anticorrosion member 3 a Sliding occurs at the contact surface between the anticorrosion member 3a and the low friction member 7, not at the contact portion. In addition, stainless steel or the like can be used as the material of the pressing member 5 if the installation location of the pipe is not constantly moistened.

  The pipe erection structure 1b having the above configuration has the same effects as those of the first embodiment described above. In addition to this, the pipe laying structure 1b of this embodiment is a pair of U-shaped fixtures 6a and 6a, and the opening of the fixture 6a is fixed so that the anticorrosion member 3a and the gantry 4 abut against each other. Therefore, the anticorrosion property of the fixture 6a is further improved.

  As shown in FIGS. 5 (a) to 5 (c), the piping construction structure 1c of the third embodiment is not a plate-like low friction member 7 but a liquid, viscous or powdery low friction layer 17. Is different from the first and second embodiments. Examples of the liquid or viscous material constituting the low friction layer include grease and oil, and examples of the powder material include graphite and molybdenum disulfide. The low friction layer 17 is applied in the same range as the lower surface of the anticorrosion member 3a. Moreover, the thickness of a low friction layer is 0.05-1 mm normally.

  As shown in FIGS. 5A to 5C, a second anticorrosion member 3 b made of zinc or a zinc alloy is disposed and fixed on the gantry 4 between the low friction layer 17 and the gantry. Similarly to the first embodiment, the second anticorrosion member 3b in the present embodiment has the same width as that of the gantry 4c of the gantry 4 and is provided at the left and right side edges of the second anticorrosion member 3b. Is provided with a hole through which the U-shaped presser 5 penetrates. In addition, as shown in FIG. 6, when a rhythm due to thermal expansion / contraction of the pipe 2 occurs due to a change in the outside air temperature, the anticorrosion member 3 a and the low friction layer 17 are not in contact with the pipe 2 and the anticorrosion member 3 a. Sliding on the contact surface

  As shown in FIGS. 7A to 7C, the piping construction structure 1d of the fourth embodiment is that the anticorrosion member 3a and the low friction layer 17 are formed integrally. And different. That is, the low friction layer is formed on the surface of the anticorrosion member 3a on the side facing the gantry 4c side of the gantry 4. The low friction layer 17 enables the low anticorrosion member 3a to be slidable with respect to the gantry 4 when the pipe 2 is thermally expanded and contracted. As such a low friction layer 17, a fluorine-type coating film and coating are mentioned, for example.

  As shown in FIGS. 7A to 7C, a second anticorrosion member 3b made of zinc or a zinc alloy is disposed and fixed on the gantry 4 between the low friction layer 17 and the gantry. . A second low friction layer 18 is further provided on the surface of the second anticorrosion member 3b facing the low friction layer 17. Examples of the second low friction layer 18 include the same as the low friction layer 17.

  The second anticorrosion member 3b has the same width as the gantry 4c of the gantry 4 as in the first embodiment, and the left and right side edges of the second anticorrosion member 3b A hole through which the U-shaped presser 5 passes is provided.

  As shown in FIG. 8, in this embodiment, unlike the first, second, and third embodiments, when rhythm due to thermal expansion and contraction of the pipe 2 occurs due to a change in the outside air temperature, the anticorrosion member 3a Sliding occurs on the contact surface between the low friction layer 17 formed on the surface facing the gantry 4 and the second low friction layer 18 provided on the upper surface of the second anticorrosion member 3b.

  The pipe erection structure 1c of the third embodiment having the above configuration and the pipe erection structure 1d of the fourth embodiment have the same effects as those of the first embodiment described above.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment.

In the embodiment described above, the gantry 4 has a substantially I-beam shape in the longitudinal section. However, the structure of the gantry 4 is not limited to this, and a gantry usually used in the technical field, for example, an H-shaped steel material. In addition, a channel steel material, a plate-like welded structure, and the like can be used as appropriate. In addition, the pipe 2 is fixed to the gantry 4 using the U-shaped pressing member 5, but the present invention is not limited thereto, and various shapes of pressing members may be used. Further, the second anticorrosive member 3b is fixed not only to the pressing member 5 of the first, third and fourth embodiments and the fixture 6a of the second embodiment, but also to a paste-like anticorrosive material and an adhesive. It may be fixed with adhesive tape, etc. Bands such as stainless steel bands and aluminum bands, metal tapes such as zinc tape, aluminum tape, and stainless steel tape, and plastic bands such as PP bands and binding bands (insulok) The second anticorrosion member 3b and the gantry part 4c of the gantry 4 may be wound together by a band, and the second anticorrosion member 3b may be fixed to the gantry part 4c.
Furthermore, in the above-described embodiment, the second anticorrosion member 3b is interposed between the low friction member 7 and the gantry 4, but the low friction member 7 and the gantry 4 are provided without interposing the anticorrosion member 3b. You may arrange so that it may touch directly. In this case, the U-shaped pressing member 5 may be fixed without using the adhesive member or the double-sided tape. In this case, a polytetrafluoroethylene plate or the like that can be bonded by applying a special etching process or the like to the surface of the low friction member 7 that is in contact with the mount 4 can be applied.

  In the second embodiment, the low friction member 7 and the second anticorrosion member 3b are fixed to the gantry 4c of the gantry 4 with the U-shaped fixtures 6a and 6a. Of the low friction member 7, the second anticorrosion member 3 b, and the gantry 4 by a metal tape such as a zinc band, a zinc tape, an aluminum tape, a stainless steel tape, or a resin band such as a PP band or a binding band (insulok). The gantry 4c may be wound together to fix the low friction member 7 and the second anticorrosion member 3b to the gantry 4c.

  Moreover, in 4th embodiment, although the 2nd low friction layer 18 was provided in the opposing surface with the low friction layer 17 in the 2nd anti-corrosion member 3b, the 2nd low friction layer 18 is provided. It does not have to be. In this case, sliding occurs on the contact surface between the low friction layer 17 formed on the surface of the anticorrosion member 3a facing the gantry 4 and the upper surface of the second anticorrosion member 3b.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited to such examples.

A piping construction structure 1a shown in FIGS. 1 (a) to 1 (c) was manufactured. As the pipe 2, a 25 A SGP pipe having a length of 100 mm whose outer peripheral surface was sandblasted was used. As the gantry 4 for supporting this, a C channel having a length of 100 mm and a width of 40 mm with a black skin that is not subjected to rust prevention treatment such as painting was used. A 25 A U-bolt was used as the U-shaped pressing member 5 for fixing the pipe 2. As the anticorrosion member 3a, a pure zinc plate having a length of 40 mm, a width of 25 mm, and a thickness of 2 mm was used. As the anticorrosion member 3b, a pure zinc plate having a length of 40 mm, a width of 70 mm, and a thickness of 2 mm was used. As the low friction member 7, a polytetrafluoroethylene plate (manufactured by Yodogawa Hutec Co., Ltd.) having a length of 80 mm, a width of 70 mm and a thickness of 0.5 mm was used. The U bolt was fastened with a torque of 1200 N · cm. Vaseline was applied to the upper surface of the polytetrafluoroethylene plate. A combined cycle corrosion test was performed on the pipe erection structure 1a.
In the cycle test, after being exposed to a salt spray environment in an environment of 35 ° C. for 2 hours, the sample was placed in a dry environment at 60 ° C. for 4 hours and then placed in a humid environment at 50 ° C. for 4 hours. After repeating this 30 times, the pipe 2 was shifted by 5 mm from the gantry 4 while being fixed by the U-shaped pressing member 5, and the above procedure was further repeated 20 times. Then, when the piping 2 was removed from the mount frame 4 and the contact part of the anticorrosive member 3a and the pipe 2 was visually inspected, rusting was not recognized in the said part. Further, a shift of 5 mm occurred between the anticorrosion member 3a and the polytetrafluoroethylene plate. Further, no rusting was observed on the contact surface between the anticorrosive member 3b and the gantry part of the gantry 4. As a comparison, when a similar corrosion test was performed on a pipe erection structure manufactured without using the anticorrosion members 3a, 3b and 3c and the low friction member 7, rusting was observed at the contact portion between the pipe 2 and the gantry 4.

FIG. 1A is a cross-sectional view showing a first embodiment of the piping construction structure of the present invention, FIG. 1B is a plan view of the piping construction structure shown in FIG. ) Is a side view of the piping construction structure shown in FIG. FIG. 2 is a side view showing a state after the pipe is thermally expanded and contracted in the pipe erection structure shown in FIG. 3A is a cross-sectional view showing a second embodiment of the pipe erection structure of the present invention, FIG. 3B is a plan view of the pipe erection structure shown in FIG. 3A, and FIG. ) Is a side view of the pipe erection structure shown in FIG. FIG. 4 is a side view showing a state after the pipe is thermally expanded and contracted in the pipe laying structure shown in FIG. FIG. 5A is a sectional view showing a third embodiment of the pipe erection structure of the present invention, FIG. 5B is a plan view of the pipe erection structure shown in FIG. 5A, and FIG. ) Is a side view of the piping construction structure shown in FIG. FIG. 6 is a side view showing a state after the pipe is thermally expanded and contracted in the pipe laying structure shown in FIG. FIG. 7A is a sectional view showing a fourth embodiment of the pipe erection structure of the present invention, FIG. 7B is a plan view of the pipe erection structure shown in FIG. ) Is a side view of the pipe erection structure shown in FIG. FIG. 8 is a side view showing a state after the pipe is thermally expanded and contracted in the pipe laying structure shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Piping construction structure 2 Piping 3a Corrosion prevention member 3b Second corrosion prevention member 4 Mounting base 4a Base part 4b Supporting part 4c Mounting part 5 Holding member 51 Nut 6a Fixing tool 7 Low friction member 17 Low friction layer 18 Second low friction layer

Claims (6)

In the pipe erection structure equipped with a metal pipe noble than zinc and a gantry supporting it,
Between the pipe and the gantry, a low friction member is disposed and fixed to the gantry,
Between the pipe and the low friction member, an anticorrosion member made of zinc or a zinc alloy plate is arranged so as to be in direct contact with the pipe and slidable with the low friction member,
The piping construction structure characterized in that the low friction member has a low friction coefficient sufficient to allow the anticorrosion member to slide relative to the low friction member when the pipe is thermally expanded and contracted.   The pipe erection structure according to claim 1, wherein a second anticorrosion member made of zinc or a zinc alloy is disposed and fixed on the gantry between the low friction member and the gantry. In the pipe erection structure equipped with a metal pipe noble than zinc and a gantry supporting it,
Between the pipe and the gantry, an anticorrosive member made of zinc or a zinc alloy plate is arranged so as to be in direct contact with the pipe,
A low friction layer is provided on the surface of the anticorrosion member facing the gantry,
The piping construction structure characterized in that the low friction layer allows the anticorrosion member to slide relative to the gantry when the piping thermally expands and contracts. Between the low friction layer and the gantry, a second anticorrosive member made of zinc or zinc alloy is disposed and fixed to the gantry,
The piping construction structure according to claim 3, wherein a second low friction layer is further provided on a surface of the second anticorrosion member facing the low friction layer. A low-friction member is disposed and fixed on the frame between a pipe made of metal precious than zinc and a frame that supports the pipe, and the pipe and the pipe are disposed before and after the low-friction member is fixed. An anticorrosion method for a pedestal portion of a pipe, in which an anticorrosion member made of zinc or a zinc alloy plate is disposed between the low friction member so as to be in direct contact with the pipe and slidable with the low friction member. There,
In the base part of the pipe, the low-friction member having a low friction coefficient that allows the anti-corrosion member to slide relative to the low-friction member when the pipe thermally expands and contracts is used. Anticorrosion method. Between the pipe made of metal noble than zinc and the gantry supporting this, an anticorrosion member made of zinc or a zinc alloy plate is arranged so as to be in direct contact with the pipe,
Before or after arranging the anti-corrosion member, the anti-corrosion method of the anti-corrosion member in the pedestal portion of the pipe providing a low friction layer on the surface facing the gantry
An anticorrosion method for a pipe gantry, wherein the low friction layer is one in which the anticorrosion member is slidable relative to the gantry when the pipe thermally expands and contracts.

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