JPH0540694U - Gas pipe protective cover - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a protective cover for gas pipes that is inexpensive and has good impact resistance and rigidity without using expensive impact resistant resins and without increasing the product thickness. To do. [PROBLEM] To provide a protective cover for a gas pipe, which is a resin-made cylindrical cover with a partially cut-away cross section, and in which a plurality of ribs are provided on the inner peripheral surface of the cover body at intervals in the longitudinal direction of the cover body. A protective cover for a gas pipe in which a plurality of ribs are provided in the longitudinal direction at intervals on the outer peripheral surface of the cover body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a protective cover for a gas pipe.

[0002]

[Prior Art]

 Conventionally, as a cover for protecting a gas pipe, the invention described in Japanese Utility Model Publication No. 2-28315 by the present applicant has been known.

This protective cover for gas pipes is a cylindrical cover made of impact-resistant resin with a cross section partially cut away, and the inner peripheral surface of the cover body has a size substantially equal to the plate thickness of the cover body. A plurality of ribs having a height are formed along the longitudinal direction of the cover body, and both notched edges of the cover body are formed as ears having a circular cross section along the longitudinal direction of the cover body. An opening is formed between the two ears to attach and detach the gas pipe.

When the gas pipe protective cover thus formed covers the gas pipe, a large gap is created between the gas pipe and the gas pipe protective cover, and thus the cushioning action is sufficiently exerted. Also, due to the large gap, even if a gas leak occurs, the gas flows in this gap, so that the site of the gas leak can be easily known. Furthermore, since it covers most of the outer peripheral surface of the gas pipe, it is possible to protect the gas pipe from damage even if it is impacted by construction machinery or tools during excavation work. Therefore, it is particularly suitable for protecting polyethylene gas pipes.

[0005]

[Problems to be solved by the device]

 However, the above-mentioned conventional protective cover is manufactured by extrusion-molding an impact resistant resin. -Styrene copolymer (ABS resin), styrene-butadiene rubber (SBR), acrylic acid and methacrylic acid polymers, chlorinated polyolefins, ethylene copolymers and other resins that improve impact resistance are blended. In addition, the cost increase was inevitable compared to the simple product made of vinyl chloride resin.

[0006] In order to manufacture a product made of vinyl chloride resin without impairing impact resistance and rigidity, the wall thickness must be designed to be thick, and then elasticity will be lost, and this gas pipe protective cover will be used as a gas pipe. Even if it is attempted to fit and cover from the notch, the notch that becomes the opening is difficult to spread and it is difficult to fit.

If the width of the notch is widened so that the gas pipe can be easily fitted, the protective cover for the gas pipe is likely to come off the gas pipe. Further, if the wall thickness is increased in this way, there is a problem that a large amount of resin is required and the cost becomes high.

Due to the above-mentioned problems, conventionally, expensive impact resistant resin is used and a relatively thin protective cover for gas pipe is used. Therefore, the present invention has been devised in view of the above problems, and the impact resistance and rigidity can be improved by devising the product shape without using expensive impact resistance resin and without increasing the thickness. The object is to provide a good and inexpensive protective cover for gas pipes.

[0009]

[Means for Solving the Problems]

 The protective cover for a gas pipe according to claim 1 is a resin-made cylindrical cover having a partially cut-away cross section, and a plurality of ribs spaced apart from each other on the inner peripheral surface of the cover main body of the cover main body. In a protective cover for a gas pipe provided along the longitudinal direction, a plurality of ribs are provided on the outer peripheral surface of the cover body at intervals.

A gas pipe protective cover according to a second aspect of the present invention is a resin cylindrical cover whose cross section is partially cut out, and a plurality of ribs are formed on the inner peripheral surface of the cover body at intervals. -A protective cover for a gas pipe provided along the longitudinal direction of the main body, in which a plurality of through holes are provided along the longitudinal direction of the cover main body at intervals in the wall thickness of the main body of the cover. Is.

Further, in the present invention, the cross-sectional shape of the tubular gas pipe protective cover may be triangular, square, circular, oval or the like, but it is easy to fit into the cylindrical gas pipe and can be evenly covered. The circle is most suitable.

[0012]

[Action]

 The protective cover for a gas pipe according to the present invention is opened in a slightly widened state, fitted into a gas pipe that has been piped, and sequentially covered, and is buried in the soil with the cutout facing down to substantially cover the outer peripheral surface of the gas pipe. It

Further, in the gas pipe protective cover according to claim 1 of the present invention, even if an impact is received by a construction machine or a construction tool in excavation work, etc., the outer peripheral surface of the cover body is spaced from each other. Since a plurality of ribs are provided along the longitudinal direction or the circumferential direction of the cover body, the rib structure reinforces the rib so that it is less likely to be damaged.

Further, in the protective cover for a gas pipe according to claim 2 of the present invention, a plurality of through holes are provided in the wall thickness of the cover body at intervals from each other along the longitudinal direction of the cover body. Also in the case of the object, since it is reinforced by the inner and outer wall support structure between the through holes, it is also less likely to be damaged.

Further, even a combination of the above structures is naturally less likely to be damaged. Further, in the protective cover for a gas pipe of the present invention, rigidity is improved and flatness due to earth pressure and wheel pressure at the time of being buried in the soil is also increased by the above-mentioned action.

[0016]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 to 9 show an embodiment according to the present invention. FIGS. 1 to 5 show a gas pipe protective cover according to the first embodiment, FIG. 1 is a perspective view, and FIG. 2 is a gas pipe protective cover. 5 is a cross-sectional view showing a state before the pipe is fitted, FIG. 3 is a cross-sectional view showing a state where the gas pipe is covered with a protective cover for a gas pipe, FIG. 4 is a cross-sectional view showing a state of being buried in the soil, FIG. ~ (C) is an enlarged cross-sectional view of the main part of the upper part of the protective cover for the gas pipe, and Figs. 6 to 9 are perspective views showing the second, third, fourth, and fifth embodiments, respectively. Is.

In FIG. 1, 2 is a protective cover for a gas pipe made of vinyl chloride resin, and the cover main body 22 is formed in a substantially circular tubular shape with a cross section partially cut away. The outer diameter of the cover body 22 is appropriately changed depending on the outer diameter of the gas pipe to be protected. In the case of a polyethylene gas pipe having an outer diameter of 42 (nominal diameter 30) mm, the outer diameter is 65 mm. It is formed so that a gap of about 10 mm is formed between and. In addition, its circumference is substantially the same as the outer circumference of a joint (not shown) that connects the gas pipes.

Reference numeral 21 denotes a cutout portion formed in a part of a circular cross section, and the opening width of the cutout portion 21 is set to be narrower than the outer diameter of the gas pipe to be protected and wider than 1/2 of the outer diameter of the gas pipe. If it is left, the gas pipe can be fitted easily and the outer periphery of the gas pipe can be sufficiently protected.

Reference numeral 3 denotes six ribs formed on the inner peripheral surface of the cover body 22 at equal intervals along the longitudinal direction, and its height is approximately equal to the thickness of the cover body 22. 0. It is preferably 5 to 3 mm and the width is greater than the height.

Reference numeral 5 denotes three ribs formed on the outer peripheral surface of the upper half of the cover main body 22 along the longitudinal direction at the center between the ribs 3 on the inner peripheral surface, and the height and width thereof are the inner peripheral surface. It is the same as rib 3 of. The rib 5 may be provided in the lower half of the cover body 22, but if this is done, the rigidity increases and it becomes difficult to fit the gas pipe 1. Therefore, it is preferable to provide this rib 5 on the outer peripheral surface of the upper half of the cover body 22.

Next, as shown in FIG. 2, the gas pipe protective cover 2 is fitted into the gas pipe 1 laid in the excavated soil from the notch 21 and is sequentially covered so that its ends overlap. As a result, as shown in FIG. 3, a gap capable of exerting a buffering action is formed between the gas pipe 1 and the gas pipe 1 to protect the gas pipe. Then, as shown in FIG. 4, when the soil 4 is backfilled and buried, the opening width of the notch 21 is narrowed by the earth pressure, and the gas pipe 1 does not come off from the gas pipe protection cover 2 sufficiently. Protected by.

Since the ribs 5 are provided on the outer peripheral surface of the upper portion of the cover body 22, the gas pipe protective cover 2 will be damaged even if a shock is received by a construction machine or construction tool in an excavation work or the like. As it becomes more difficult, the rigidity is improved and the flat strength due to earth pressure and wheel pressure when buried in the soil is also increased.

In the embodiment shown in FIGS. 1 to 4, the rib 5 on the outer peripheral surface of the upper half of the cover body 22 is a triple rib formed in the center between the ribs 3 on the inner peripheral surface along the longitudinal direction. However, for example, as shown in the enlarged cross-sectional view of the main part of the upper portion of the protective cover for the gas pipe in FIG. 5, various modes are conceivable in the interval between the ribs 5 and the number of the ribs 5, and the embodiments shown in FIGS. It is not limited to the examples.

FIG. 6 is a perspective view showing a second embodiment. In this case, it is the same as FIG. 1 except that the side wall of the cover body 22 is designed to be thicker than the upper part. By doing so, it becomes more difficult for the notch 21 to open and the gas pipe 1 to come off the gas pipe protective cover 2.

FIG. 7 is a perspective view of the third embodiment, in which a plurality of annular ribs 6 are provided on the outer peripheral surface of the upper half of the cover body 22 at equal intervals in the longitudinal direction of the cover body. However, it has the same effect as the rib 5 of FIG. The height and width of the annular ribs 6 are the same as those of the ribs 3 on the inner peripheral surface, and are preferably arranged at equal intervals. For the same reason as in the embodiment of FIG. It is more preferable to provide it on the outer peripheral surface, but it is not limited to this.

FIG. 8 is a perspective view showing a fourth embodiment, in which a circular through hole 7 is formed in the longitudinal direction in the wall thickness between the ribs 3 on the inner peripheral surface of the upper half of the cover body 22. It is provided individually. The diameter of the through hole 7 is approximately half the thickness of the cover body 22 or less, and is provided at the center in the thickness direction. In addition, the shape of the through holes 7 may be an ellipse, an ellipse, a rectangle, or the like, and the intervals, the number, the arrangement positions, etc. of the through holes 7 are not limited.

FIG. 9 is a perspective view showing a fifth embodiment, in which ribs 8 having the same height and width as the ribs 3 are equally spaced between the ribs 3 on the inner peripheral surface of the upper half of the cover body 22. Are provided on the uppermost portion, two on each side, and one on each side, in the longitudinal direction. As described above, the ribs 8 may be unevenly distributed on the inner peripheral surface of the upper half of the cover body 22 that requires the most impact resistance and rigidity, and the number of ribs 8 and the arrangement position are not limited.

Further, although not shown in the figure, the combined effects of the first to fifth embodiments can achieve the same or higher effects as those of the above embodiments.

[0029]

[Effect of the device]

 The protective cover for the gas pipe of the present invention has an improved product shape so that it is inexpensive and has good impact resistance and rigidity without using expensive impact resistant resin and without increasing the product thickness. It is possible to obtain a protective cover, especially for polyethylene gas pipes.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which the gas pipe protective cover of the first embodiment is fitted and covered on the gas pipe.

FIG. 3 is a cross-sectional view showing a state in which the gas pipe protective cover of the first embodiment is covered on the gas pipe.

FIG. 4 is a cross-sectional view showing a state of being buried in the soil.

FIG. 5 is an enlarged cross-sectional view of an essential part of the upper portion of the gas pipe protective cover according to the first embodiment of the present invention.

FIG. 6 is a perspective view showing a second embodiment of the present invention.

FIG. 7 is a perspective view showing a third embodiment of the present invention.

FIG. 8 is a perspective view showing a fourth embodiment of the present invention.

FIG. 9 is a perspective view showing a fifth embodiment of the present invention.

[Explanation of symbols]

 1 Polyethylene Gas Pipe 2 Protective Cover 21 Notch 22 Cover Body 3 Rib 4 Soil 5 Rib 6 Annular Rib 7 Through Hole 8 Rib

Claims (2)

[Scope of utility model registration request] 1. A gas which is a resin-made cylindrical cover whose cross section is partially cut out, and in which a plurality of ribs are provided along the longitudinal direction of the cover body at intervals on the inner peripheral surface of the cover body. A protective cover for a gas pipe, wherein a plurality of ribs are provided on the outer peripheral surface of the cover body at intervals from each other. 2. A gas which is a resin-made tubular cover having a partially cut-away cross section, and a plurality of ribs provided along the longitudinal direction of the cover body at intervals on the inner peripheral surface of the cover body. A protective cover for a gas pipe, characterized in that a plurality of through holes are provided in the wall thickness of the cover main body at intervals from each other along the longitudinal direction of the cover main body.