JPH061992U - Metal tube anticorrosion sleeve - Google Patents

Abstract

(57) [Abstract] [Purpose] The end of a flexible sleeve that covers the outer circumference of the metal pipe to prevent corrosion can be securely fixed to the outer circumference of the metal pipe by a simple operation, resulting in poor construction. To lose. [Structure] An annular passage 2 is provided over the entire circumference of an end of a sleeve 1, and a cord 3 is passed through the passage 2. Both ends of the cord body 3 are pulled out of the passage 2, and the cord body 3 is pulled and tightly bound to squeeze the end portion of the sleeve 1, and the end portion of the sleeve 1 is closed.
Fixed to the outer circumference of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a metal pipe anticorrosion sleeve for preventing corrosion of a metal pipe buried in the ground.

[0002]

[Prior art]

 It is known that when a metal pipe is laid in corrosive soil, a polyethylene sleeve is put on the outer circumference of the metal pipe to prevent the soil from coming into contact with the metal pipe in order to prevent the corrosion. ing.

Conventionally, when covering a sleeve when laying this metal pipe, as shown in FIG. 5, the outer circumference of each metal pipe 11 is covered with a sleeve 13 having a length to cover the end, and the vicinity of the end is covered. The sleeve 13 is fixed by winding an adhesive tape 14 or a rubber band around the outer periphery of the sleeve 13. Then, the metal pipe 11 is laid with both ends of the sleeve 13 folded back, and the pipe joint portion 12 is joined. After that, the end of the sleeve 13 of one of the metal pipes 11 is covered on the outer circumference of the pipe joint portion 12, and the adhesive tape 15 or the rubber band is wound around the outer circumference of the tip, and fixed to the outer circumference of the mating metal pipe 11. . Next, the other end of the sleeve 13 of the metal tube 11 is further covered on the outer side thereof, and the adhesive tape 16 or the rubber band is wound around the outer periphery of the tip end of the sleeve 13 and fixed to the outer periphery of the sleeve 13. This prevents dirt, water, etc. from entering the sleeve 13 and coming into contact with the metal tube 11.

[0004]

[Problems to be solved by the device]

 However, as described above, the work of covering the sleeve 13 is quite troublesome, and it is necessary to explain the work procedure to the first person who works and what must not be done at that time. However, in practice, the guidance may not be thorough, and even if the adhesive tapes 15 and 16 and the rubber band are once wrapped, they may be in a fixed state that allows water to easily enter and exit. There is a problem that defects may occur.

Therefore, the present invention solves such a problem, the end portion of the sleeve can be properly fixed by a simple work, and the sleeve for corrosion prevention of a metal pipe can improve the reliability of construction. The purpose is to provide.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides an annular passage over the entire circumference of the end of a flexible sleeve that can be put on the outer circumference of a metal tube. Is drawn out of the passage so that it can be bound tightly.

[0007]

[Action]

 According to this structure, an annular passage is provided at the end of the sleeve to pass the cord through.Thus, by pulling both ends of this cord and squeezing the end of the sleeve, this end is fixed to the outer circumference of the metal pipe. With a simple operation that can be done by anyone, a large gap is created between the end of the sleeve and the outer circumference of the metal tube, or part of the end of the sleeve is turned up to prevent water etc. It can be fixed in a state where it does not come in and go out easily.

[0008]

【Example】

 In FIG. 2, reference numeral 1 denotes a flexible sleeve which covers the outer circumference of a metal tube to prevent corrosion, and is composed of a synthetic resin sheet such as polyethylene or a polyethylene film. The sleeve 1 has a diameter that can be fitted onto the outer periphery of the pipe joint portion of the metal pipe, and a length that covers both ends of the metal pipe with a margin. As shown in detail in FIG. 3, both ends of the sleeve 1 are folded back with an appropriate width, and the tip of the folded back portion is fixed to the body side to form an annular passage 2 over the entire circumference. A cord 3 is passed through the passage 2, and both ends of the cord 3 are drawn to the outside from an opening 4 formed by making a cut at one location of the annular passage 2.

As shown in detail in FIG. 4, both ends of the cord body 3 pulled out from the opening 4 of the passage 2 are inserted into a well-known reverse return preventing jig 6. The reversion preventing jig 6 is provided with a narrowed passage portion 6a and a rotatable and displaceable toothed locking ring 6b installed in the vicinity of the narrowed passage portion 6a. After passing through 6a, it is configured to pass through the outside of the locking ring 6b.

Next, the work of covering the outer circumference of the metal tube with the sleeve 1 will be described. In FIG. 1, the sleeve 1 is externally fitted to the body of each metal pipe 7 before the metal pipe 7 is laid, and both ends of the sleeve 1 are folded or loosened to cover the body of the pipe. Then, in that state, the metal pipe 7 is laid in the groove cut from the surface of the earth, and the pipe joint portion 8 is joined. Next, the end portion of the sleeve 1 covered with one metal pipe 7 is covered with the outer periphery of the pipe joint portion 8, and the tip end thereof is positioned at the end of the body portion of the mating metal pipe 7. Then, the ends of the sleeve 1 are squeezed by pulling both ends of the cord body 3 to bind them tightly, and the sleeve 1 is fixed by the reversion preventing jig 6. By using the reverse return preventing jig 6 in this way, it is possible to fix the cord body 3 more easily and reliably than simply tying the ends of the cord body 3 in a pulled state.

Next, the other end of the sleeve 1 covered with the metal pipe 7 is covered with the outside of the end of the sleeve 1 already covered with the pipe joint portion 8 described above, and the other end of the sleeve 1 is covered with the other metal pipe. The end of the sleeve 1 is tightly bound and fixed by pulling both ends of the cord 3 in the same manner as above, by arranging the end of the body 7 corresponding to the end.

In this way, by pulling and tightly binding the cord body 3 at the end of the sleeve 1 to squeeze the end, the neat sleeve 1 is fixed to the outer periphery of the metal tube 7 by a simple work that anyone can do. It is possible. Therefore, it is possible to reliably prevent water from entering and exiting due to a large gap between the end of the sleeve 1 and the outer circumference of the metal tube 7 or a part of the end of the sleeve 1 being turned up. I can do it.

[0013]

[Effect of device]

 As described above, according to the present invention, an annular passage is provided at the end of the sleeve to pass through the cord body.Therefore, by pulling and tightly binding the cord body to squeeze the end portion of the sleeve, The end can be fixed to the outer circumference of the metal tube, and anyone can perform simple work to ensure that the end of the sleeve does not easily enter or leave the outer edge of the metal tube. It can be fixed and the construction reliability can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a pipe joint portion in a state in which a sleeve according to an embodiment of the present invention is covered.

FIG. 2 is a plan view of the sleeve.

FIG. 3 is an enlarged sectional view of an end portion of the sleeve.

FIG. 4 is a cross-sectional view of a cord fastening means in the sleeve.

FIG. 5 is a cross-sectional view of a pipe joint portion with a conventional sleeve covered.

[Explanation of symbols]

 1 Sleeve 2 Passage 3 String 7 Metal tube

Claims (1)

[Scope of utility model registration request] 1. An annular passage is provided over the entire circumference of an end of a flexible sleeve that can be put on the outer circumference of a metal tube, and a cord body is passed through the passage, and both ends of the cord body are outside the passage. A metal tube anti-corrosion sleeve characterized by being able to be pulled out and bound tightly.