JPH07253190A - Corrosion preventive cover for pipe - Google Patents

Abstract

PURPOSE:To provide a corrosion preventive cover for a pipe, which can be easily fitted on a pipe, and surely exhibits corrosion preventive function. CONSTITUTION:The corrosion preventive cover 10 covering the joint section of a pipe 1 is made up of a cover main body 12 to be wound in the circumferential direction along the circumference of a joint section 7, a locking member 12 to be secured on engaged sections at both the peripheries of the cover main body 11, and of tie-bands 13 to be bound around both the end sections 11a of the cover main body 11, and the corrosion preventive cover 10 for the pipe 1 is spread from its each cut line 14 so as to be externally secured over the joint section 7 of the pipe 1 hanged down in a place to be buried in such a manner that the corrosion preventive cover 10 is wound up. The locking member 12 is then secured on both engaged sections 15 from the side in a state that the engaged sections of the corrosion preventive cover 10 are faced to each other, and the tie-bands 13 are wound around both end sections of the corrosion preventive cover for the pipe 10 so as to be fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anticorrosion cover for a pipe, which covers a pipe such as a cast iron pipe to protect the outer surface of the pipe from corrosion.

[0002]

2. Description of the Related Art When burying pipes such as cast iron pipes underground, if the soil to be buried is acidic soil, landfill, clay, peatland, etc. Since the joint part of the pipe has many protruding parts such as bolts and push rings and is easily damaged during construction, it is more likely to be corroded than the body part. Therefore, in order to prevent these corrosions, it has been conventionally performed to cover the outer surface of the pipe by covering the pipe with an anticorrosion cover made of resin or the like. As a conventional method for covering the pipe with the anticorrosion cover, the method shown in FIGS. 8 to 13 or 14 to 19 has been used.

That is, as shown in FIG. 8, first, in a state where the pipe 1 is lifted by a wire rope 2 or the like, a tubular anticorrosion cover 3 having a diameter larger than that of the pipe 1 is inserted into the outer peripheral side of the pipe 1. Four
Then, as shown in FIG. 9, the anticorrosion cover 3 is extended in the tube axis direction and attached to the body portion 5 of the tube 1. At this time, the joint portion 7 of the pipe 1 to which the insertion port 4 and the receiving port 6 are connected can be covered with the anticorrosion cover 3 in a later step,
Corrosion-proof cover 3 is attached to body part 5 by the amount that covers this joint part 7.
Loosen it on both ends and leave it in advance. Further, in order to bring the anticorrosion cover 3 into close contact with the body portion 5 of the pipe 1, a part of the anticorrosion cover 3 is folded at the top position of the pipe 1 and the folded tip edge portion 3a is fixed with an adhesive tape 8 or a rubber band. To do. Then, after further wrapping the adhesive tape 8 or the rubber band around the receiving port 6 side and the inserting port 4 side once or more to fix the anticorrosion cover 3 to the pipe 1, as shown in FIG. Fold back the anticorrosion cover 3 on the mouth 4 side.

After that, as shown in FIG. 11, the pipe 1 is suspended from the buried portion while the corrosion-preventing cover 3 is not damaged, and the insertion port 4 and the receiving port 6 of the joint portion 7 are connected. Then, as shown in FIG. 12 and FIG. 13, the folded back portion of the anticorrosion cover 3 is returned to the original position, and the joint portion 7 is covered with the anticorrosion cover 3
Further, the work of fixing the end portion of No. 2 with the adhesive tape 8 or the rubber band is performed on both the pipe 1 to be connected and the pipe 1 to be connected, and the work of attaching the anticorrosion cover 3 is completed.

Further, as shown in FIG. 14, the anticorrosion cover 3
3A for straight pipe and 3B for joint
When individually mounting and, as shown in FIGS. 15 to 17, after mounting the straight pipe anticorrosion cover 3A on the body portion 5 of the pipe 1 and suspending the pipe 1 in the same manner as described above, The joint anticorrosion cover 3B is set on the insertion port 4 side of the pipe 1 in a contracted state, and thereafter, the insertion port 4 and the receiving port 6 of the joint part 7 are connected. Then, as shown in FIG. 18, after setting the protective pad 9 on the upper part of the joint portion 7 as necessary, as shown in FIG. 19, the joint portion 7 is covered with the joint portion anticorrosion cover 3B. Both ends of the anticorrosion cover 3B are fixed with the adhesive tape 8 or the rubber band, and the attaching work of the straight pipe anticorrosion cover 3A and the joint anticorrosion cover 3B is completed.

The anticorrosion covers 3, 3A, 3B are thinly formed to have a thickness of about 0.2 mm in order to easily perform work such as contraction and extension. Since the upper portion of the pipe 1 in 3B is easily damaged by the impact of earth and sand when backfilling, as described above, a part of the anticorrosion cover 3 is folded at the top position of the pipe 1 or the upper portion of the joint portion 7. The protection pad 9 was set on.

[0007]

However, the anticorrosion cover 3, the straight pipe anticorrosion cover 3A, and the conventional structure as described above are provided.
When fitting the joint anticorrosion cover 3B, the tubular anticorrosion cover 3, straight pipe anticorrosion cover 3A, and joint anticorrosion cover 3B must be inserted into the pipe 1 before connecting the pipe 1 with the joint 7. However, it was troublesome and the workability was poor.

Further, since the thickness of the anticorrosion covers 3, 3A, 3B is thin, the joints 7 of the pipe 1 are easily broken, and the anticorrosion function may not be fulfilled. Furthermore, if the adhesive tape 8 or the rubber band is not properly fixed, the anticorrosion performance is deteriorated, and the anticorrosion performance depends on these fixed states.
In the case of rainy weather at the time of construction, the adhesive tape 8 may become wet and not adhere, and the anticorrosion covers 3, 3A, 3B may not be reliably attached.

The present invention solves the above problems, and an object of the present invention is to provide a pipe anticorrosion cover which can be easily attached to a pipe and can reliably obtain an anticorrosion function.

[0010]

In order to solve the above-mentioned problems, the pipe anticorrosion cover of the present invention is wound in the circumferential direction along the outer periphery of the pipe, and the engaged portions formed at both edges thereof are provided. A cover body that is butted against each other in a direction along the axial direction,
An engaging member that is mounted over both engaged parts in a posture in which these engaged parts are butted against each other to bring the engaged parts into close contact with each other and to cover the break between the engaged parts, and the outer circumference of the pipe. And a fastener that is wound around both ends of the cover body that is wound around the cover body so that both ends of the cover body are in close contact with the outer peripheral surface of the tube.

[0011]

According to the above construction, even after the pipes are connected to each other at the buried location, the cover main body is covered along the outer periphery of the pipe, and the engaged portions at both edges thereof are abutted to each other, and the engaged portions are engaged with each other. The pipe anticorrosive cover can be easily attached by winding both ends of the cover body around the outer periphery of the pipe with fasteners after attaching the locking member to the pipe. At this time, the cut between both engaged parts of the cover body is covered with the locking member, and both ends of the cover body are brought into close contact with the outer peripheral surface of the pipe by the fasteners, so that the cover outer periphery of the pipe is The sides are completely covered to ensure the anticorrosion function.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that those having the same functions as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted.

In FIGS. 1 and 2A to 2C,
Reference numeral 10 denotes a pipe anticorrosion cover that covers the joint portion 7 of the pipe 1, and the pipe anticorrosion cover 10 includes a cover body 11 wound circumferentially along the outer periphery of the joint portion 7 of the pipe 1, and the cover body 1
It comprises a locking member 12 mounted on both edges of the tube 1 and a tie band 13 as a fastener wound around both ends 11a of the cover body 11 wound around the outer periphery of the tube 1.

The cover body 11 has a thickness of 0.3, for example.
It is made of an elastic member made of resin (polyethylene or the like) having a diameter of up to 0.5 mm, and has a substantially cylindrical shape with a bulge in the center side, and is divided into circumferentially divided parts by a cut 14 along the axial direction of the pipe 1. ing. Cover body 11 which is a division
Engagement portions 15 are formed on both edges so as to protrude to the outer peripheral side along the axial direction of the pipe 1, and these engagement portions 15 are abutted to each other.
The surfaces of the engaged portions 15 that are abutted with each other are flat surfaces, and the abutted portions 15 are configured to be in close contact with each other when they are abutted. On the other hand, each engaged portion 15
A groove portion 15a extending in the axial direction is formed on the surface opposite to the surface to be abutted.

Further, the locking member 12 has a substantially U-shaped cross section, is exteriorly mounted over both of the engaged parts 15 which are butted, and is formed with a pair of convex parts 12a projecting inward. By mounting the locking member 12 along the axial direction so that the convex portion 12a is inserted into the groove portion 15a of the engaged portion 15, the engaged portions 15 can be reliably held in abutted state. Has become.

The tie band 13 is composed of a bendable band body 13a and a tightening member 13b fixed to one end of the band body 13a, and the other end side of the band body 13a is inserted into the tightening member 13b for tightening operation. Is supposed to do.

In this embodiment, a polyethylene resin sleeve 16 serving as a straight pipe anticorrosion cover is mounted on the body portion 5 of the pipe 1, and the resin sleeve 16 is substantially the same as that of the pipe 1. The diameter is the same as that of the body portion 5. Further, the pipe anticorrosion cover 10 with the locking member 12 attached has a diameter of both ends of the pipe anticorrosion cover 10 that is equal to that of the pipe 1.
The body portion 5 is formed to have the same diameter as the body portion 5.

In the above structure, the resin sleeve 16 is previously mounted on the body portion 5 of the pipe 1 on the ground, and the tie bands 13 are respectively wound around both ends of the resin sleeve 16 and tightened (see FIG. 3). Thereby, the resin sleeve 16 can be securely fixed to the body portion 5 of the pipe 1. The pipe 1 is hung down at the embedding location while preventing the resin sleeve 16 from being damaged, and the insertion port 4 and the receiving port 6 of the joint portion 7 are connected as shown in FIG.

Next, as shown in FIG. 5, the pipe anticorrosion cover 10 is spread from the cut 14, and the pipe anticorrosion cover 10 is wrapped around the joint portion 7 of the pipe 1 suspended at the buried location. . At this time, not only the joint portion 7 of the pipe 1,
The resin sleeve 16 around which the tie band 13 is wound is also covered with the pipe anticorrosion cover 10 including both ends thereof. Then, as shown in FIG. 6, in a state where the engaged portions 15 of the pipe anticorrosion cover 10 are butted against each other, the locking members 12 are attached to both engaged portions 15 from the side. As a result, FIG. 7 and FIG.
As shown in (a), the engaged portion 1 of the pipe anticorrosion cover 10
5 is covered with the locking member 12, and the cut 14 of the pipe anticorrosion cover 10 is prevented from being exposed to the outside.

Finally, as shown in FIG. 7, tie bands 13 are wound around both ends 11a of the pipe anticorrosion cover 10 and tightened. As a result, the pipe anticorrosion cover 10 can be securely fixed to the body portion 5 of the pipe 1, and the outer peripheral side of the pipe 1 is completely covered by the resin sleeve 16 and the cover body 11, so that the anticorrosion function can be reliably obtained. .

As described above, since the pipe anticorrosion cover 10 can be installed after the pipes 1 are connected by the joint portion 7,
The exterior work of the pipe anticorrosion cover 10 can be easily performed, and the workability is improved. Further, since the resin sleeve 16 and the pipe anticorrosion cover 10 are shaped so as to fit the pipe 1, the pipe 1 can be well covered, and the resin sleeve 16 and the pipe anticorrosion cover 10 are formed thick so as not to be folded. Even if it does not hinder the exterior work, it will not be damaged by the impact such as earth and sand at the time of backfilling, and the anticorrosion function will be improved. Also,
Since the resin sleeve 16 and the pipe anticorrosion cover 10 can be formed thick, it is possible to omit the work of folding a part or inserting the protective pad as in the conventional case, and further save the labor.

Furthermore, since both ends of the resin sleeve 16 and the pipe anticorrosion cover 10 are fastened and fixed by the tie bands 13, even if it is rainy during the construction, the construction can be carried out without any trouble and the work efficiency is improved. To do. Further, since the exterior work can be easily and surely performed only by tightening the tie band 13 and mounting the locking member 12, the fixed state of the resin sleeve 16 and the pipe anticorrosion cover 10 is not deteriorated, and good anticorrosion is achieved. The performance can be surely obtained.

In the above embodiment, the case where the resin sleeve 16 is attached to the body portion 5 of the pipe 1 as a straight pipe anticorrosion cover is described. However, instead of the resin sleeve 16, the same as the pipe anticorrosion cover 10 is used. It is also possible to use a substantially straight-cylindrical one having such a structure, which also makes it possible to obtain the same effects such as excellent workability. Further, the pipe anticorrosion cover 10 and the resin sleeve 16 are not limited to those made of resin, and any material having elasticity may be used.

[0024]

As described above, according to the present invention, the cover main body having the engaged portions formed on both edges and the cover body mounted on both the engaged portions in a posture in which these engaged portions abut each other. By providing the locking member and the fastener for closely contacting both ends of the cover main body with the outer peripheral surface of the pipe, the exterior work of the pipe anticorrosion cover can be easily performed, and the workability becomes good, and The anticorrosion cover for pipes can be formed thick, and it will not be broken by the impact of earth and sand at the time of backfilling, and the anticorrosion function will be improved. Further, even if it is raining during the construction, the construction work can be performed without any trouble and reliably, and the work efficiency is improved.

[Brief description of drawings]

FIG. 1 is a front view showing an assembling procedure of a pipe anticorrosion cover according to an embodiment of the present invention.

2 (a) to (c) are perspective views of an anticorrosion cover for the same pipe,
It is a side view and a principal part enlarged side view.

FIG. 3 is a cross-sectional view illustrating a procedure for mounting the pipe anticorrosion cover.

FIG. 4 is a front view showing a procedure for constructing a pipe to which the pipe anticorrosion cover is exteriorly mounted.

FIG. 5 is a front view showing a procedure for constructing a pipe on which the pipe anticorrosion cover is exteriorly mounted.

FIG. 6 is a front view showing a procedure for constructing a pipe on which the pipe anticorrosion cover is exteriorly mounted.

FIG. 7 is a front view showing a procedure for constructing a pipe on which the pipe anticorrosion cover is exteriorly mounted.

FIG. 8 is a front view showing a procedure for constructing a pipe to which a conventional pipe anticorrosion cover is exteriorly mounted.

9 (a) and 9 (b) are a front view and a side sectional view showing a procedure for constructing a pipe to which the conventional pipe anticorrosion cover is mounted.

FIG. 10 is a front view showing a procedure for constructing a pipe to which the conventional pipe anticorrosion cover is mounted.

FIG. 11 is a front view showing a procedure for constructing a pipe to which the conventional pipe anticorrosion cover is mounted.

FIG. 12 is a front view showing a procedure for constructing a pipe on which the conventional pipe anticorrosion cover is exteriorly mounted.

FIG. 13 is a front view showing a procedure for constructing a pipe to which the conventional pipe anticorrosion cover is mounted.

FIG. 14 is a perspective view of another conventional pipe anticorrosion cover.

FIG. 15 is a front view showing a procedure for constructing a pipe to which the conventional pipe anticorrosion cover is mounted.

FIG. 16 is a front view showing a procedure for constructing a pipe on which the conventional pipe anticorrosion cover is exteriorly mounted.

FIG. 17 is a front view showing a procedure for constructing a pipe on which a conventional pipe anticorrosion cover is mounted.

FIG. 18 is a front view showing a procedure for constructing a pipe on which a conventional pipe anticorrosion cover is exteriorly mounted.

FIG. 19 is a front view showing a procedure for constructing a pipe on which a conventional pipe anticorrosion cover is mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 pipe 7 joint part 10 pipe anticorrosion cover 11 cover body 12 locking member 13 tie band (fastener) 14 cut 15 engaged part 16 resin sleeve

Claims (1)

[Claims] 1. Wound in the circumferential direction along the outer circumference of the pipe,
The cover main body in which the engaged parts formed on both edges thereof are butted against each other in the direction along the axial center, and the engaged parts are mounted over the both engaged parts in a posture in which these engaged parts are butted to each other, A locking member that brings the engaging parts into close contact with each other and covers the cut between the engaged parts, and both ends of the cover body that is wound around the outer circumference of the pipe and is wound around the outer circumference of the pipe. An anticorrosion cover for pipes, which is provided with a fastener that is closely attached to.