Telescopic perforated pipe

Abstract

The present invention relates to an expandable perforated pipe that can be formed into a spiral pipe by winding a material in a spiral shape, that can be expanded and contracted in the longitudinal direction by sliding a cover section above a perforated section with a large number of through holes, that can increase the width of the perforated section to improve drainage when expanded, that can adjust the longitudinal expansion distance by folding first and second bend sections in opposite directions at the side edge edges of the cover section and the perforated section, and that has an improved structure that eliminates the need for a separate nonwoven fabric during construction of the perforated pipe by arranging a cover member with a woven structure on the outside of the perforated pipe and prevents the holes from being blocked by external soil.

Description

[Technical field]

[0001] The present invention relates to an expandable perforated pipe, and in particular to an expandable perforated pipe which can be wound up in a spiral shape to form a spiral pipe, which can be expanded and contracted in the longitudinal direction by sliding a cover part over a perforated part having a large number of holes, and which can improve drainage when extended by increasing the width of the perforated part, and which can adjust the expansion and contraction distance in the longitudinal direction by folding first and second bend parts in opposite directions at the side edge ends of the cover part and the perforated part, and which has an improved structure such that nonwoven fabric can be omitted when constructing the perforated pipe by arranging a cover member with a woven structure on the outside of the perforated pipe, and which can prevent the holes from being blocked by external soil. [Background technology]

[0002] Generally, perforated pipes are used as leachate transport pipelines in reclaimed land or landfill sites such as farmland, rock roads, tunnels, or river basins. They are mainly covered with nonwoven fabric on the outer periphery to increase the water collection and multiplication effect, prevent soil inflow, and prevent clogging of the pipeline. They are installed under asphalt roads to be used as surface water transport pipelines for asphalt roads.

[0003] In addition, the perforated pipe has a high porosity and excellent chemical resistance, making it resistant to corrosion and electrolytic corrosion and allowing for semi-permanent use. It also has excellent external pressure strength, making it suitable for use as a leachate and gas collection pipe in landfill sites.

[0004] Most of such conventional perforated pipes are made of synthetic resin pipes, which have low durability, are weak against heat, and have low compressive strength, so that buried perforated pipes are prone to breakage.

[0005] Although the damaged perforated pipe needs to be replaced, the maintenance and repair of the damaged perforated pipe requires a lot of time and cost. Therefore, the maintenance and repair of the damaged perforated pipe is not easy.

[0006] An example of a conventional prior art related to existing perforated pipes is disclosed in Korean Utility Model Publication No. 20-0376282, "Cylindrical Perforated Pipe" (Registration Date: 2005.02.07), in which a number of horizontal lines are arranged at regular intervals and a spiral ring is integrally formed around the horizontal lines to improve the fluid discharge capacity, thereby forming a number of through holes in the parts where the horizontal lines and the spiral ring do not intersect.

[0007] An example of prior art previously filed by the applicant is disclosed in Korean Patent Publication No. 10-978007 (registration date: August 19, 2010) titled "Stainless Steel Perforated Pipe," which relates to a stainless steel perforated pipe that has alternating protrusions and perforated sections with water collection holes, making it flexible and easy to install, and that effectively collects surface water through the water collection holes, and is made of stainless steel, making it heat-resistant, and has enhanced compressive strength.

[0008] However, in the case of existing perforated pipes, since a large number of through holes are drilled at fixed intervals between the drilled sites, the transport volume becomes large during transportation, and there is a risk of deformation due to external shocks occurring during transportation. In addition, there is a drawback in that the longitudinal flexibility is small, resulting in poor workability.

[0009] Furthermore, in the case of existing perforated pipes, the intervals between the holes are narrow, which is a drawback in that drainage is poor.

[0010] In addition, in the case of existing perforated pipes, there is a risk that fine soil particles may clog the holes, so a construction method has been adopted in which nonwoven fabric is wrapped around the outer periphery of the perforated pipe, and then the fabric is covered with gravel or soil and compacted. This has the limitation that the nonwoven fabric must be wrapped around the outer periphery of the perforated pipe several times, and there is a drawback in that if the nonwoven fabric wrapped around the perforated pipe comes undone, the fine soil particles may clog the holes, causing the perforated pipe to lose its function. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Korean Registered Utility Model No. 20-0376282 [Patent Document 2] Korean Patent No. 10-978007 Summary of the Invention [Problem to be solved by the invention]

[0012] The present invention has been created in consideration of and to solve the above-mentioned problems, and its purpose is to provide an expandable perforated pipe whose structure is improved so that the length in the longitudinal direction can be changed by spirally winding a perforated portion having a number of through holes drilled therein and first and second bent portions formed at the side edges of a cover portion so that the pipe can be expanded and contracted in the longitudinal direction, and the width of the perforated portion can be increased to improve drainage when expanded.

[0013] Another object of the present invention is to provide an expandable perforated pipe having an improved structure that allows the expansion and contraction distance in the longitudinal direction to be adjusted by bending the first and second bending portions in opposite directions at the side edge ends of the cover portion and the perforated portion.

[0014] Yet another object of the present invention is to provide an expandable perforated pipe having an improved structure in which a woven cover member is placed on the outside of the perforated pipe, thereby making it possible to omit the use of nonwoven fabric during construction of the perforated pipe and to prevent the holes from becoming clogged with external soil. [Means for solving the problem]

[0015] In order to achieve the above object, the present invention provides a winding tape that includes a punching section, which corresponds to a left portion of a body portion and has a number of through holes formed therein such that the inside and outside of the winding tape are connected to each other; a cover section, which corresponds to a right portion of the body portion and is formed to form a step with respect to the punching section so that the cover section has a larger diameter than the punching section during a spiral winding operation; and first and second extension ends bent symmetrically in opposite directions at side edges of the cover section and the punching section, and first and second bent sections having first and second bent ends bent at different heights in directions in which the respective ends face each other at ends of the first and second extension ends, wherein the cover section and the punching section are alternately arranged during a spiral winding operation, and a first bent section 130 formed on the cover section is coupled to surround a second bent section formed on the punching section, so that the cover section can slide in a longitudinal direction above the punching section.

[0016] The mask may further include a cover member that is connected to surround the outside of the body portion and the first and second bent portions and is knitted to allow inflow and outflow of fluid.

[0017] The cover member may be made by braiding metal wires.

[0018] The first bent portion may include a first extension end extending vertically downward from a side edge of the cover portion and a first bent end bent from an end of the first extension end toward the punching portion, and the second bent portion may include a second extension end extending vertically upward from a side edge of the punching portion and a second bent end bent from an end of the second extension end toward the cover portion.

[0019] The cover portion may include a step surface formed to vertically connect the cover portion to the punch portion that is stepped with respect to the cover portion. Effect of the Invention

[0020] The perforated pipe of the present invention has a cover part that can slide above the punching part, so that the overall length can be adjusted, and the expansion and contraction distance between the cover parts can be adjusted by the first and second bend parts formed on the cover part and the punching part, so that when the perforated pipe is transported, each cover part covers the punching part respectively, reducing the overall length and allowing it to be transported in a contracted state, making it easier to transport.When the perforated pipe arrives at the installation site and is to be installed, the pipe extends to its original length and the punching part is exposed to the outside, so that a perforated pipe that is connected between the inside and outside can be installed through the through hole formed in the punching part.

[0021] In addition, since a cover member is provided on the outside of the perforated pipe, there is no need to wrap it in a separate nonwoven fabric during the installation stage, making installation easy and having the advantage of being able to prevent the holes from becoming clogged due to the nonwoven fabric unraveling. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is a perspective view showing the appearance of a perforated pipe according to the present invention. [Diagram 2] FIG. 2 is a perspective view showing a state during a contracting operation of the perforated pipe according to the present invention. [Diagram 3] FIG. 2 is a cross-sectional view of FIG. [Figure 4] FIG. 3 is a cross-sectional view of FIG. 2. [Diagram 5] FIG. 2 is a perspective view showing the cover member of the present invention coupled to the outside of a perforated pipe. [Figure 6] FIG. 6 is a cross-sectional view of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The expandable perforated pipe according to the present invention will be described in more detail below with reference to the accompanying drawings.

[0024] In the description of the present invention, if it is determined that a specific description of related known technologies or configurations may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Furthermore, the terms described below are defined in consideration of their functions in the present invention, but may vary depending on the user's intention or practice. Therefore, the definitions must be determined based on the overall contents of this specification. Furthermore, "including" a certain component does not mean excluding other components, but may further include other components, unless otherwise specified.

[0025] 1 to 6, the expandable perforated pipe according to the present invention includes a punched portion 120 having a number of through holes 125 formed therein so that the inside and outside of the pipe are connected to each other, a cover portion 110 formed to be stepped with respect to the punched portion 120 so that the cover portion 110 has a larger diameter than the punched portion 120 when wound up in a spiral shape, and first and second bent portions 130, 140 having first and second extension ends 132, 142 bent symmetrically in opposite directions at side edges of the cover portion 110 and the punched portion 120, and first and second bent ends 134, 144 bent at different heights at ends of the first and second extension ends 132, 142 in directions in which the ends face each other.

[0026] Referring to FIG. 1, the body part 150 includes a punching part 120 and a cover part 110, and the first and second bending parts 130 and 140 are formed on the left and right edges of the body part 150.

[0027] The punching portion 120 corresponds to the left side of the body portion 150, and has a structure in which a number of through holes 125 are formed to connect the inside and the outside, and is formed at a lower height than the cover portion 110 in terms of cross-sectional structure.

[0028] The cover part 110 corresponds to the right side of the body part 150 and extends to form a step with respect to the punching part 120 so as to be formed at a height higher than the punching part 120 in a cross-sectional structure.

[0029] The cover portion 110 has a step surface 112 formed to vertically connect the cover portion 110 and the punching portion 120 in a stepped state with respect to the punching portion 120 .

[0030] Referring to FIG. 3, the first bent portion 130 is composed of a first extension end 132 extending vertically downward from a side edge end of the cover portion 110, and a first bent end 134 bent from an end of the first extension end 132 toward the punch portion 120.

[0031] The second bent portion 140 includes a second extension end 142 extending vertically upward from a side edge of the punch portion 120, and a second bent end 144 bent from an end of the second extension end 142 toward the cover portion 110.

[0032] That is, the first and second bent portions 130, 140 have a structure in which the first and second extension ends 132, 142 are bent in opposite directions from each other in the vertical direction from the ends of the cover portion 110 and the punch portion 120, and the first and second bent ends 134, 144 are bent in directions facing each other at the ends of the first and second extension ends 132, 142.

[0033] The body 150 and the first and second bent parts 130 and 140 may be made of any one of metal, plastic, and synthetic fiber materials, but are not limited to these materials. Here, a description will be given of a metal material as an example.

[0034] As shown in Figures 5 and 6, the present invention further includes a cover member 200 that is connected to surround the outside of the body portion 150 and the first and second folded portions 130, 140 and is knitted to allow fluid to flow in and out.

[0035] The cover member 200 is constructed by weaving metal wire or other materials (here, durable metal wire is exemplified), thereby preventing the through holes 125 of the punching portion 120 from being blocked by soil while allowing fluid to flow in and out from the inside and outside.

[0036] In other words, the cover member 200 allows fluid (water) to pass through the gaps where the metal wires are woven to cross each other, and allows the fluid to flow in and out of the interior of the perforated pipe 100 through the through holes 125 of the perforated portion 120, thereby blocking external soil from reaching the perforated pipe 100 and preventing the through holes 125 from becoming clogged.

[0037] The perforated pipe 100 and the cover member 200 may be coupled together by inserting the perforated pipe 100 into the cover member 200 prior to installation of the perforated pipe 100 .

[0038] The length of the cover member 200 corresponds to the length of the extended perforated pipe 100 .

[0039] In the present invention having such a configuration, a metal piece having a number of through holes 125 at regular intervals on the top and bottom is bent to form first and second bent portions 130 and 140, and then wound in a spiral shape to form a perforated pipe 100.

[0040] During the above-mentioned spiral winding operation, the cover portion 110 and the punching portion 120 are alternately arranged, and the first bent portion 130 formed on the cover portion 110 is coupled to surround the second bent portion 140 formed on the punching portion 120.

[0041] The first bending portion 130 formed in the cover portion 110 slides longitudinally above the second bending portion 140 formed in the perforated portion 120, thereby providing the perforated pipe 100 of the present invention with an expandable structure that can contract or expand longitudinally.

[0042] Here, during the expansion of the cover part 110, as shown in FIGS. 1 and 3, the first bent end 134 of the first bent part 130 engages with the second extended end 142 of the second bent part 140 disposed in the vertical direction, and the second bent end 144 of the second bent part 140 engages with the first extended end 132 of the first bent part 130, thereby limiting the expansion length. During the contraction, as shown in FIGS. 2 and 4, as the adjacent cover parts 110 approach each other, the first extended end 132 interferes with the stepped surface 112 of the adjacent cover part 110, thereby limiting the contraction length. Therefore, during the expansion and contraction of the perforated pipe 100 of the present invention, the total length can be limited so that the perforated pipe 100 expands or contracts within a certain range.

[0043] As described above, in the perforated pipe 100 of the present invention, the cover part 110 can slide over the punching part 120, so that the overall length can be adjusted. The first and second bending parts 130, 140 formed on the cover part 110 and the punching part 120 can adjust the distance between the cover part 110 for expansion and contraction. When the perforated pipe 100 is transported, each cover part 110 can be transported in a contracted state to cover the punching part 120, respectively, thereby reducing the overall length, which increases the convenience of transportation. When the perforated pipe 100 arrives at the installation site and is installed, the perforated pipe 100 can be extended to its original length to expose the punching part 120 to the outside, so that the perforated pipe 100 can be installed with the inside and outside connected through the through hole 125 formed in the punching part 120.

[0044] In addition, since the cover member 200 is provided on the outside of the perforated pipe 100, there is no need to wind up a separate nonwoven fabric during the installation stage, making installation easy and preventing the through hole 125 from becoming clogged due to the unraveling of the nonwoven fabric.

[0045] Furthermore, the present invention has the advantage that the first and second folding portions 130, 140 are formed symmetrically in opposite directions at the side edge ends of the cover portion 110 and the punching portion 120, so that the cover portion 110 can slide and adjust the expansion and contraction distance in the longitudinal direction.

[0046] As described above, although the detailed description of the present invention has been given of specific embodiments, it goes without saying that various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by not only the claims below but also equivalents to the claims.

[0047] Furthermore, the perforated pipe 100 and the cover member 200 according to the present invention are not limited to the sizes, such as the length and diameter, shown in the drawings.

[0048] In other words, the present invention described above is not limited to the specific preferred embodiments described above, and it goes without saying that anyone having ordinary skill in the art to which the present invention pertains can make various modifications without departing from the spirit of the present invention as claimed in the claims, and such modifications are intended to fall within the scope of the claims. [Explanation of symbols]

[0049] 100 perforated pipe 110 Cover part 112 Step surface 120 Drilling section 125 Through hole 130 1st bending section 132 1st extension end 134 1st bent end 140 2nd bending section 142 2nd extension end 144 2nd bent end 150 Torso 200 Cover member

Claims

1. A punching section (120) corresponding to the left side of the body section (150) and having a number of through holes (125) formed therein so as to communicate the inside and the outside; a cover portion (110) corresponding to a right side portion of the body portion (150) and formed to form a step with respect to the punching portion (120) so as to have a diameter larger than that of the punching portion (120) during a spiral winding operation; a first and second folded portion (130, 140) having first and second extension ends (132, 142) folded symmetrically in opposite directions from each other at side edges of the cover portion (110) and the punching portion (120), and first and second folded ends (134, 144) folded at different heights from each other at ends of the first and second extension ends (132, 142) in directions in which the respective ends face each other; a cover member (200) which is connected to the body portion (150) and the first and second bent portions (130, 140) so as to surround the outside thereof and in which metal wires are braided to allow fluid to flow in and out, During a spiral winding operation, the cover portion (110) and the punching portion (120) are alternately arranged, a first bent portion (130) formed on the cover portion (110) is coupled to surround a second bent portion (140) formed on the punching portion (120), and the cover portion (110) can slide in a longitudinal direction above the punching portion (120), The telescopic perforated pipe is characterized in that the cover member (200) is configured so that the body portion (150) is inserted therein after the sliding operation.

2. The first bent portion (130) includes a first extension end (132) extending vertically downward from a side edge of the cover portion (110), and a first bent end (134) bent from an end of the first extension end (132) toward the punching portion (120), The expandable perforated pipe as described in claim 1, characterized in that the second bent portion (140) includes a second extension end (142) extending vertically upward from the side edge end of the perforated portion (120) and a second bent end (144) bent from the end of the second extension end (142) toward the cover portion (110).

3. The expandable perforated pipe as described in claim 1, characterized in that the cover portion (110) includes a step surface (112) formed to vertically connect the cover portion (110) to the perforated portion (120) which is stepped relative to the cover portion (110).

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