KR101206104B1 - A steel ribbed pipe for preventing water leak - Google Patents

Abstract

PURPOSE: A metal rib steel pipe for preventing water leakage is provided to prevent soil contamination due to the outflow of foreign materials and the leakage of water because silicon sealants are injected in bent portions to firmly couple a lock seam portion. CONSTITUTION: A metal rib steel pipe for preventing water leakage comprises fish hook-shaped bent portions(200) and a lock seam portion(110). The fish hook-shaped bent portions oppositely bent each other are formed in both edges of a galvanized iron sheet. One bent portion is hung on the other bent portion to form a space of the bent portions. After sealants(250) are firstly injected in the space of the bent portions, both bent portions are vertically pressed by a pressing roller. The sealants are secondarily injected between inner and outer joints of the bent portions to form the lock seam portion.

Description

{A Steel Ribbed Pipe for Preventing Water Leak}

The present invention relates to a metal rib steel pipe for preventing leakage, and more particularly, in manufacturing a metal rib steel pipe, injecting a silicone sealant in the fishing needle-like bent formed on both edges of the rib steel sheet lock core (Lock The present invention relates to a leak-proof metal rib pipe which can be securely prevented from leaking from a rib steel pipe by tightly coupling a seam) part.

In general, as a pipe for guiding the movement of fluid in roads, ports, sewage treatment plants, etc., concrete fume pipes are mainly used. Such concrete fume pipes have heavy weights and volume due to their increased weight and volume. When construction is required, the construction period is longer due to the increase of the joints, along with the deterioration of workability due to the installation and dismantling of the formwork. There are several problems, such as weak or cracked or damaged.

Therefore, in recent years, as a trend of using a metal tube using a metal plate, such as galvanized steel sheet, a metal rib-type steel pipe that uses a lock seam connected to the boundary portion rolled to form a cylindrical shape while rolling the galvanized steel sheet in a spiral shape, Such a metal rib-type steel pipe has a plurality of ribs formed in a spiral shape on the remaining portion except the lock core connection portion of the steel pipe body.

In view of the related art, Korean Patent Publication No. 10-0935531 discloses a hot rolled steel plate which is galvanized and has a rib 120 to which a galvanized steel sheet formed by spiraling is rolled in a spiral to connect the lock core 130 to the rolled boundary. In the rib-shaped steel pipe, the welded joint 140 formed by integrally joining the steel sheet portions connected to the lock core by welding, and the ceramic coating layer 150 coated with a ceramic coating agent on the steel pipe surface Although a rib-type steel pipe is disclosed, the ceramic joint layer 150 coated with the ceramic coating agent on the weld joint 140 and the surface of the steel pipe may not be firmly bonded to the ceramic film layer due to strong water pressure after a long time. There is a problem that the crack is generated to corrode the pipe is not satisfactory durability.

In addition, the Republic of Korea Patent Publication No. 10-0718869 is created by the insertion between the fitting piece and the spiral rib after inserting the fitting piece 200 partitioning the inner space of the spiral rib 120 from the inner space of the tube 100. Although an eco-friendly metal rib tube is disclosed that includes a sealing member 300 formed to cover a gap to be formed, the fitting piece is formed of a magnesium plated or magnesium plate on a general metal, so that the fluid flow inside the tube is not good. , The sealing member is formed by mixing the porous sealing material and magnesium powder, magnesium is expensive and has a light weight disadvantage, the sealing material is a porous powder can not cover enough to seal the gaps or insertion parts, etc., due to leakage There is a problem that corrosion is generated and the durability is not satisfactory.

Therefore, there is an urgent need to develop a leak-proof metal rib steel pipe to which the new technology that can solve the above problems is applied.

The present invention has been made in order to solve the above problems, to form a fishing needle-like bent portion bent in opposite directions on both edges of the galvanized steel sheet material of the rib steel pipe and then inject sealant into the space formed when joining The object of this invention is to provide a rib steel pipe for preventing water leakage by engaging a lock core.

The present invention is a ribbed galvanized steel sheet is a metal rib steel tube spirally wound, forming a hook-shaped bent portion bent in the opposite direction to each other on both edges of the galvanized steel sheet, and the other bent to the other bent portion After the first injection of the sealant into the space of the bent portion formed by connecting and pressing both of the bent up and down with the compression roller while injecting the second sealant between the inner and outer seams of the bent portion to form a lock core portion Provide rib steel pipe.

       The present invention also provides a metal rib steel pipe, characterized in that the sealant is a one-component or two-component silicone sealant.

       In another aspect, the present invention is characterized in that a metal coating layer coated with a ceramic coating agent prepared by mixing a colloidal silica and a polyether modified polydimethylsiloxane is formed on the body of the metal rib steel pipe. Provide rib steel pipe.

       In another aspect, the present invention provides a metal rib steel pipe, characterized in that the ceramic coating layer is applied to a thickness of 20㎛ ~ 30㎛.

Finally, the present invention a) an uncoiling step of supplying a galvanized steel sheet wound on an uncoiler at a constant speed; b) forming ribs at predetermined intervals on the galvanized steel sheet supplied in the step and then bending both edges in opposite directions to form a fishing needle-type bent portion; c) firstly injecting a silicone sealant into a space of the bent portion formed by connecting the other bent portion to one side bent portion formed in the step; d) injecting silicon sealant secondly between inner and outer seams of the bent portion while pressing both bent portions up and down with a pressing roll to form a lock core portion; e) spirally winding the rib steel plate on which the lock core is formed to form a rib steel pipe; f) forming a ceramic coating layer 300 coated with a ceramic coating agent manufactured by mixing a colloidal silica and a polyether modified polydimethylsiloxane on the body 100 of the metal rib steel pipe. ; g) it provides a method of manufacturing a leak-proof metal rib steel pipe comprising the step of cutting the rib steel pipe formed in the step to a predetermined length.

The leak-proof metal rib steel pipe according to the present invention and a method of manufacturing the first, by injecting a silicone sealant to the bent portion formed on both edges of the rib steel sheet to securely lock the seam (Lock seam) by the coupling of the lock core is weakened by water pressure It can prevent the soil pollution due to leakage or leakage of foreign substances from it, so it can be used eco-friendly.

Second, by forming a ceramic coating layer coated with a ceramic coating agent manufactured by mixing colloidal silica and modified polydimethylsiloxane on the inside and the outside of the rib steel pipe, corrosion resistance and adhesion of the pipe can be improved, thereby greatly improving the durability of the steel pipe. have.

1 is a perspective view of a metal rib-shaped steel pipe according to the prior invention.
2a, b, c, d are cross-sectional views of the main configuration of the metal rib steel pipe according to the present invention.
3 is a perspective view of a metal rib steel pipe according to the present invention.
4 is a main process diagram of a method of manufacturing a metal rib steel pipe according to the present invention.

Hereinafter, a leak-proof metal rib steel pipe of the present invention and a manufacturing method thereof will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

       First, a method of manufacturing a leak-proof metal rib steel pipe according to the present invention will be described in detail with reference to FIGS. 2 and 4.

       The galvanized steel sheet wound on the uncoiler (Uncoiler) is supplied at a constant speed, and then the rib 120 is formed at a predetermined interval using a rib molding machine on the galvanized steel sheet. Both side edges of the galvanized steel sheet are bent in opposite directions to each other to form a fishing needle-type bent portion 200, and the other bent portion 200 is hung on one side bent portion 200 formed on the edge of the galvanized steel sheet. The sealant 250 is first injected into the space of the bent portion 200 formed by connection. Subsequently, while pressing both the bending parts 200 up and down with a compression roller, the sealant 250 is injected secondly between the inner and outer seams of the bending parts so that the lock core part 110 is formed, and then the rib steel plate is spirally continually formed. To form a ribbed steel pipe. The ceramic coating layer 300 is formed on the body 100 of the metal rib steel pipe by applying a ceramic coating agent prepared by mixing a colloidal silica and a polyether modified polydimethylsiloxane through a nozzle. do. The steel pipe is cut to a predetermined length using a cutting machine to produce a metal rib steel pipe.

       Metal rib steel pipe according to the present invention is a pipe for guiding the movement of the fluid in the road, port, sewage treatment plant, etc., the fishing needle bent in the opposite direction to each other at the edge portion of the rolled galvanized steel sheet to form a cylindrical shape Formed bent part 200 is connected to the lock seam (lock seam), a plurality of ribs 120 are formed spirally on the steel pipe body 100, the material can be galvanized hot-rolled steel sheet to prevent corrosion It is made of a galvanized steel sheet, and the galvanized steel sheet is rolled in a spiral shape and the steel core and the end of the steel plate of the curled boundary portion (200) consisting of a hook to be connected to each other by bending the hooks (200) to the lock seam (110) connection This constitutes a cylindrical steel pipe.

       In addition, at least one spiral rib 120 protrudes along the circumferential surface of the tubular body 100, which is a body of the steel pipe, and a cross section of the spiral rib 120 has one side (inner wall surface side of the tubular) opening. Formed to form a square. Of course, the spiral rib 120 may be formed to form a trapezoid or other polygonal shape. In this case, when the plurality of spiral ribs 120 are provided, the positions of the start ends of the spiral ribs 120 are different from each other. Preferably, the positions of the start ends of one end of the tubular body 100 are equally divided. Each is determined by site.

       In the leak-proof metal rib steel pipe as described above, both ends of the steel plate are bent in a fishing needle shape in opposite directions to each other, and the sealant 250 is first injected into the space of the bent portion 200 formed by combining them with the space. Fills. After that, while pressing both of the bent parts 200 up and down with a compression roller, the sealant 250 is injected secondly between the inner and outer seams of the bent part so that the lock core 110 is firmly coupled. Accordingly, since the lock core 110 is integrally bonded by the sealant 250, the gap is not generated while the connected portion is not separated from the external force but remains firmly connected.

       The sealant 250 is a sealing agent mainly composed of polysiloxane, and a silicone sealant is preferable. The one-pack type is a package containing a main body and a curing agent, and is cured by moisture in the air. In the two-part type, the main ingredient and the curing agent are packaged separately, and then mixed with each other when used. These are divided into acetic acid type, acetone type, alcohol type and oxime type depending on the components of the cured by-products released during reaction with moisture in the curing process. Curable silicone sealants are used in various fields for adhesion purposes. The silicone sealant used in the present invention may be used in both one-component or two-component type, but is more preferable because the two-component type has a higher curing rate at room temperature and a higher elasticity than the one-component type.

       Subsequently, the ceramic coating layer 300 is formed by applying a ceramic coating agent made from colloidal silica and polyether-modified polydimethylsiloxane to the outer circumferential surface or the inner circumferential surface or both surfaces of the tubular body 100. In this case, the ceramic coating layer 300 may be formed by adding inorganic pigments of various colors to the ceramic coating agent as necessary.

The ceramic coating agent is prepared by mixing hydrophobic polyether modified polydimethylsiloxane with a ceramic made of colloidal silica.

       The metal rib steel pipe coated with the ceramic coating agent can prevent soil contamination due to leakage or leakage of foreign substances by the ceramic coating layer together with the lock core 110 into which the sealant 250 is injected. Excellent chemical resistance, corrosion resistance and adhesiveness can greatly improve the durability of the steel pipe.

The ceramic coating layer 300 may be formed only on any one of the outer circumferential surface or the inner circumferential surface of the steel pipe body 110, it can be used to form both on the outer circumferential surface and the inner circumferential surface of the steel pipe body (110).

       In the metal rib steel pipe of the present invention, the thickness of applying the ceramic coating agent to the surface of the steel pipe body 110 is preferably 20 ~ 30㎛. When the coating thickness is less than 20㎛ may cause a phenomenon that the adhesive strength with the surface of the steel pipe body 110 is lowered and the hiding power is lowered, if the thickness exceeds 30㎛ thickening is not easy to dry and wrinkles during painting Due to the loss of workability and poor workability, cracking occurs during complete drying.

Hereinafter, preferred examples are provided to aid the understanding of the present invention, but the following examples are merely illustrative of the present invention, and the scope of the present invention is not limited thereto.

After supplying the galvanized steel sheet wound at an uncoiler at a constant speed, and then forming the ribs 120 at regular intervals with a rib molding machine, both edges were bent in opposite directions to each other to form the fishing needle-type bent portion 200. Formed. Subsequently, after injecting the two-component silicone sealant into the space of the bent portion formed by hooking the other bent portion 200 to one side bent portion 200 of the galvanized steel sheet and connecting them to each other, the two bent portions 200 are pressed into a roll. While pressing up and down, a two-component silicone sealant was injected between the inner and outer seams of the bent portion, and then the lock core 110 was formed while spirally wound to form a rib steel pipe. Subsequently, 15 μm of a ceramic coating prepared by mixing colloidal silica having a mean particle size of 20 μm and polyether modified polydimethylsiloxane by spraying on both surfaces of the steel pipe body 110. After coating and curing twice in thickness to form a ceramic coating layer 300, the rib steel pipe was cut to a predetermined length to produce a leak-proof metal rib steel pipe.

A metal rib steel pipe was manufactured in the same manner as in Example 1 except that the ceramic coating agent was applied twice with 15 μm thickness and then cured twice with 9 μm thickness and cured twice.

A metal rib steel pipe was manufactured in the same manner as in Example 1 except that the coating agent was applied twice to 15 μm thickness and then cured once to 32 μm thickness and cured once.

Comparative Example

Instead of injecting silicone sealant into the bend in Example 1, a conventional polyurethane sealant used in the art is injected, and a ceramic coating agent prepared by mixing polysiloxane with silica is used instead of the ceramic coating agent used in Example 1. A metal rib steel pipe was manufactured by the same method except that the metal rib steel pipe was used.

<Experimental Example>

The metal rib steel pipes manufactured in Examples 1 to 3 and Comparative Examples were measured for each test item as described below, and the measurement results are shown in Table 1 below.

   1. Hydraulic strength test

After sealing both openings of the metal rib steel pipe, the water holding was held for 2 hours in a state of filling with water, and then the water pressure was gradually increased to measure the water pressure when the sealant of the lock core portion was broken.

   2. Corrosion resistance measurement

The metal rib tube specimens of Examples 1 to 3 coated with the coating agent and the specimens of Comparative Examples were immersed in a 5% sulfuric acid solution for 24 hours to measure the swelling, discoloration, peeling, and dissolution of the coating layer by the KS D 6711 method.

   3. Adhesiveness

Draw 100 squares (10mmx10mm) with 11 equally spaced parallel lines at 1mm intervals to reach the base with a sharp knife at 30 ° and make 100 squares (10mmx10mm) to cross the box, and then set up a box according to KS D 6711. A stripping test was conducted on this part with a tape to investigate the number of peelings of 50% or more in the square coating. (Circle): There is no peeling, (triangle | delta): Peeling is 30 or less and x: Peeling shows 30 or more.

   4. Hardness

Each one of the specimens were dried at 180 ° C. for 30 minutes in a drier according to KSD 6711 standard, and repeated 10 times by mm 10 with 1 kgf force to measure pencil hardness.

  5. Water repellency

The specimens of Examples 1 to 3 and Comparative Examples were dried in a dryer at 150 ° C. for 20 minutes, and then water repellency was measured by the JIS-S-1092 spray method, and the water repellency was 100: no moisture adhered to the surface. There is some moisture attached to the surface, 80: A considerable portion attached to the surface is wet.

Test measurement result Example 1 Example 2 Example 3 Comparative example Water pressure strength 5.2 kgf / cm² 5.1 kgf / cm² 5.2 kgf / cm² 4.8 kgf / cm² Corrosion resistance clear Slightly cracked Slightly cracked Slight discoloration, cracking Adhesion ○ △ △ △ Hardness 9H 8H 8H 8H Water repellency 100 90 90 90

   Example 1 according to the present invention, as shown in the above [Table 1], the water pressure strength was much better than the comparative example injecting a conventional polyurethane-based sealant used in the art. In particular, since the average particle is a nano-sized inorganic particle containing 20 colloidal silica, the metal rib steel pipes of Examples 1 to 3 having a ceramic coating layer made of an environmentally friendly, high-functional ceramic coating agent are prepared from silica and polysiloxane. Compared with the comparative example, it was found to be excellent in all of corrosion resistance, adhesion, hardness and water repellency. In addition, Example 1, which is a preferred embodiment of the present invention, is excellent in corrosion resistance, adhesion, and water repellency by sulfuric acid, which prevents the metal rib steel pipe from being easily corroded, thereby improving durability and semi-permanently increasing its lifespan.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

100: steel pipe body 110: lock core
120: rib 200: bend
250: sealant 300: ceramic coating layer

Claims (6)

In the metal rib steel pipe in which the galvanized steel sheet on which the rib 120 is formed is spirally wound,
The bending portion 200 formed on both sides of the galvanized steel sheet is formed by hooking the fishing needle-like bent portion 200 bent in the opposite direction to each other, by hooking the other bent portion 200 to one bent portion 200. After the first injection of the sealant 250 into the space of the two bent portion 200 by pressing the roller up and down while injecting the sealant 250 between the inner and outer joints of the bent portion 200 to lock Metal rib steel pipe, characterized in that the core 110 is formed.
The method of claim 1,
The sealant 250 is a metal rib steel pipe, characterized in that the one-component or two-component silicone sealant.
The method of claim 2,
The body 100 of the metal rib steel pipe is characterized in that the ceramic coating layer 300 is coated with a ceramic coating agent manufactured by mixing colloidal silica and polyether modified polydimethylsiloxane. Metal rib steel pipe.
The method of claim 3,
The ceramic coating layer 300 is a metal rib steel pipe, characterized in that applied to a thickness of 20㎛ ~ 30㎛.
a) an uncoiling step of supplying a galvanized steel sheet wound on an uncoiler at a constant speed;
b) forming the ribs 120 at a predetermined interval on the galvanized steel sheet supplied in the step and then bending both edges in opposite directions to form a fishing needle-type bent portion 200;
c) first injecting a sealant into a space of the bent part 200 formed by hooking the other bent part 200 to the one bent part 200 formed in the step and connecting to each other;
d) injecting a sealant secondly between inner and outer seams of the bent portion 200 while pressing both of the bent portions 200 up and down with a pressing roll so that the lock core portion 110 is formed;
e) spirally winding the rib steel plate on which the lock core portion 110 is formed to form a rib steel pipe;
f) forming a ceramic coating layer 300 coated with a ceramic coating agent manufactured by mixing a colloidal silica and a polyether modified polydimethylsiloxane in the body 100 of the rib steel pipe;
g) a method of manufacturing a leak-proof metal rib steel pipe, comprising the step of cutting the rib steel pipe formed in the step to a predetermined length.
6. The method of claim 5,
The sealant is a method of manufacturing a metal rib steel pipe, characterized in that the one-component or two-component silicone sealant.

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