KR20110066305A - A jointing device for corrugated stell pipes - Google Patents

Abstract

PURPOSE: A jointing device for a corrugated steel pipes is provided to enhance assembling intensity and compatibility and save manufacturing cost, since first and second tightening bolts are formed in the same structure. CONSTITUTION: A jointing device for a corrugated steel pipes consists of one joining member(10) and a pair of fixing members(12,12'). The cutting parts(24,24') of corrugated steel pipes to be joined are buried in bosh sides of the rubber ring(20) of the joining member and thus are firstly closed. Water-swelling resin layers are attached to both sides of the rubber ring. Since the volumes of the water-swelling resin layers are increased by the water or moisture of the inside or outside of the corrugated pipes, the rough cut parts of the corrugated pipes secondly close the gap between the corrugated pipes and the rubber ring or the gap due to assembling tolerance between corrugated pipes and the joining member.

Description

Connecting device of corrugated steel pipe {A JOINTING DEVICE FOR CORRUGATED STELL PIPES}

The present invention is used as a drainage pipe of sewage, rainwater, wastewater and sewage in various civil works, or a water supply pipe of living water, industrial water and agricultural water, and the general corrugated steel pipe and inner and outer surfaces installed in underground pipes are coated with synthetic resin. The present invention relates to a corrugated corrugated steel pipe connecting device.

In general, corrugated steel pipes are shipped from the manufacturing plant in the state of being cut to have a predetermined length by using saw blades during steelmaking. It is cut to length and connected.

The corrugated steel pipe has an end portion where the cutting portion is not smooth during the cutting process using the saw blade during manufacturing, especially when the cutting portion is cut at the construction site by using a simple cutting equipment.

In addition, since corrugated steel pipes are often not able to have a rounded end, relatively large assembly tolerances are required when connecting corrugated steel pipes compared to general straight steel pipes.

In Korean Patent No. 0508201, a flange is fastened to an outer side of a coupling portion of corrugated steel pipes to be connected, and a soft or hard packing having fastening grooves is inserted between two flanged corrugated steel pipes, and then the flanges of both sides are bolted and bolted. A device for connecting a corrugated corrugated steel pipe which can be fixed is disclosed.

In the publication of the present invention, when the corrugated steel pipes of both sides are compressed, the corrugated steel pipe is inserted into the fastening grooves formed on both sides of the packing, thereby compressing the corrugated steel pipe by compressing the end of the corrugated steel pipe with the outer diameter and the inner diameter of the packing. Although it is described as preventing leakage, it is not only that the end of the cut corrugated steel pipe is not smooth, but also there must be a tolerance for assembly between the outer diameter and the inner diameter of the packing, so there is a gap between the end of the packing and the corrugated steel pipe. Since there is no choice but to have a fatal drawback caused by leakage between the gaps.

In addition, since the soft or hard packing is molded into one body, manufacturing costs are high.

In addition, the flange is punched on both sides of each fixing plate constituting the fastening band to form a fixed projection and a compression projection to the outside, but formed a compression projection in the front and rear on one side, and forming a fastening hole in the center of the compression projection to the other side of the fixed projection The space is formed on both sides so that the compression protrusions of the other fixing plates can be fastened and protruded, and the fixing plates can be fixed to the ends of corrugated steel pipes. Not only is it very cumbersome, but it also has the disadvantage of not being able to shorten the working time.

An object of the present invention can effectively prevent the leakage between the gap between the uneven portion of the cut portion of the corrugated steel pipe to be connected as well as the allowance of assembly between the corrugated steel pipe and the connecting member to be connected, and the corrugated steel pipes to be connected more easily and firmly It is to provide a corrugated steel pipe connecting device that can be fixed.

The present invention relates to a connector of a corrugated steel pipe, the connection device of the corrugated steel pipe comprising a connecting member into which the cut portions of the corrugated steel pipes to be connected and a pair of fixing members respectively fixed to the corrugated steel pipes to be connected, wherein the connection The member is formed of an inner metal ring, an outer metal ring, and a rubber ring fixed to a center of an outer circumferential surface of the inner metal ring and an inner circumferential surface of the outer metal ring, and a water-expandable resin layer is attached to both sides of the rubber ring. The fixing member is composed of an open ring elastic ring made of a round bar, and both ends of the open ring elastic ring are provided with a fastening protrusion having a long hole, and at least two or more having a long hole on an outer circumferential surface of the open ring elastic ring. Ribs are provided, and the open ring elastic rings closely adhere to the valleys of the corrugated steel pipes to be connected. The first tightening bolt and the nut fastened to the fastening protrusion and the corrugated steel pipes to be connected to each other so as to be fixed to each other so that the open ring-type elastic ring facing each other are pulled together to pull the corrugated steel pipes to be connected to each other And a second tightening bolt and a nut fastened to the ribs so as to be fixed to the ribs.

In addition, the first tightening bolt and the second tightening bolt according to the invention is provided with a square neck on the head side (Square Neck) is characterized in that it is not rotated when fitted in the long hole of the tightening projections, the long hole of the ribs It is done.

The connecting device of the corrugated steel pipe according to the present invention is that the cut portions of the corrugated steel pipes to be connected are buried in both sides of the rubber ring in the connecting member to seal the cut portions primarily, as well as the water expandability attached to both sides of the rubber ring. The volume of the resin layer is expanded by the water or moisture inside or outside the corrugated steel pipes connected to each other, and the gap between the corrugated steel pipes and the connection member between the corrugated steel pipes and the connecting member due to the unevenness of the cut portions is caused. Because it seals the secondary, it shows very excellent leak prevention property.

In addition, the connecting device of the corrugated steel pipe according to the present invention is a connection member is made of a rubber ring is fixed between the inner metal ring and the outer metal ring and the inner and outer metal rings and the water-expandable resin layer is bonded to both sides, soft Compared with the conventional one-piece packing made of hard or rigid, not only can reduce the manufacturing cost but also shows excellent durability.

In addition, the connecting device of the corrugated steel pipe according to the present invention is composed of an open ring-type elastic ring of a pair of fixing members having a round bar and having a fastening protrusion having a long hole at both ends and a rib having a long hole at the outer circumferential surface thereof. In addition, since the first and second fastening bolts fastened to the fastening protrusion and the rib have the same structure, the manufacturing cost can be further reduced, the assembly is very easy, and excellent assembly strength and compatibility are exhibited.

The present invention will be described in more detail with reference to the accompanying drawings.

1 is an exploded view of a corrugated steel pipe connection device according to the present invention, Figure 2 is a perspective view showing a portion of the connecting member shown in Figure 1, Figure 3 is a perspective view of the fixing member shown in Figure 1, Figure 4 Partial cross-sectional view illustrating a state of use of the corrugated steel pipe connection device according to the invention.

As illustrated in FIGS. 1 to 3, the corrugated steel pipe connection device according to an exemplary embodiment of the present invention includes one connection member 10 and a pair of fixing members 12 and 12 ′.

The connecting member 10 has an inner metal ring 16 having an outer diameter smaller than the average inner diameter d of the corrugated steel pipes 14 and 14 'to be connected thereto, and the outer diameter D of the corrugated steel pipes 14 and 14'. It consists of an outer metal ring 18 having a large inner diameter, and a rubber ring 20 in which the inner circumferential surface and the outer circumferential surface are fixed to the center of the outer circumferential surface of the inner metal ring 16 and the inner circumferential surface of the outer metal ring 18, respectively. The water-expandable resin layers 22 and 22 'are bonded to the exposed both sides of the rubber ring 20 to be connected between the inner metal ring 16, the outer metal ring 18, and the rubber ring 20. Space portions 26, 26 'are provided for inserting the cut portions 24, 24' of the steel pipes 14, 14 '.

The fixing members 12 and 12 'are made of open ring elastic rings 28 and 28' made of round rods.

Fastening protrusions 32 and 32 'are fixed to both ends of the open ring-type elastic rings 28 and 28', and the tightening protrusions 32 and 32 'of the open-ring elastic rings 28 and 28'. Long holes 34 and 34 'facing each other in the circumferential direction are formed, and at least two ribs 36 welded at regular intervals are provided on the outer circumference of the open ring elastic ring 28 and 28'. The rib 36 is formed with a long hole 38.

Open ring type elastic rings 28 and 28 'constituting the fixing members 12 and 12' are cut portions 24 and 24 'of corrugated steel pipes 14 and 14' to be connected as illustrated in FIGS. The first clamp is inserted into the bone portion (40, 40 ') of the periphery, and inserted into the long hole (34') of the other tightening projection (32 ') from the long hole 34 side of one tightening projection (32) The circumferential direction of the open ring elastic ring 28, 28 'by tightening the bolts 42, 42' and the nuts 44, 44 'which are spirally coupled to the first tightening bolts 42, 42'. The size is reduced and firmly fixed to the valleys 40 and 40 'of the corrugated steel pipes 14 and 14' to be connected.

Cutting portions of the corrugated steel pipes 14 and 14 'to which the fixing members 12 and 12' are fixed, as shown in FIGS. 1 and 4, on both side spaces 26 and 26 'of the connecting member 10. (24, 24 ') is inserted and inserted through the long hole 38 in the rib 36 facing the open ring-type elastic ring (28, 28') forming the fixing member (12, 12 ') Pull the two tightening bolts 46 and 46 'and the corrugated steel pipes 14 and 14' to be connected by tightening the second tightening bolts 46 and 46 'and the nuts 48 and 48' which are screwed together. As shown in FIG. 4, the cut portions 24 and 24 ′ of the corrugated steel pipes 14 and 14 ′ to be connected are buried on both sides of the rubber ring 18 in the connecting member 10. The cut portions 24 and 24 'of the corrugated steel pipes 14 and 14' to be connected are hermetically sealed.

After the corrugated steel pipes 14 and 14 'connected in this way are installed in the underground buried pipeline, the corrugated steel pipes 14 and 14' are opened to open the corrugated steel pipes 14 and 14 '. Water or moisture from the outside of 14 'penetrates into the space 26, 26' where the cut portions 24, 24 'of the corrugated steel pipes 14, 14' are primarily sealed in the connecting member 10. It comes in contact with the water-expandable resin layers 22 and 22 'adhered to both sides of the rubber ring 20.

Therefore, as shown in FIG. 4, the spaces 26 and 26 ′ expand the resins 22a and 22a ′ while the volume of the water-expandable resin layers 22 and 22 ′ in contact with water or moisture expands. 2) to seal the connection part of the cutting part (24, 24 ') to the secondary so that the leak is completely blocked.

In the present invention, the first and second tightening bolts (42, 42 ', 46, 46') is an example in order to tighten the nut 44, 44 ', 48, 48' more convenient to tighten For example, the fastening protrusions 32 and 32 'in the open ring elastic rings 28 and 28' of the fixing members 12 and 12 'and the long holes 34, 34' and 38 of the ribs 36 are caught. A square neck bolt is provided on the side of the head 50 to prevent rotation when the angle neck 52 is fitted into the long holes 34, 34 ′ and 38. ), Simply tighten the nut 44, 44 ', 48, 48' without holding the first and second tightening bolts 42, 42 ', 46, 46' so as not to rotate with a separate tool. It is desirable to be able to give.

1 is an exploded view of a corrugated steel pipe connection device according to the present invention.

2 is a perspective view showing a portion of the connecting member shown in FIG.

3 is a perspective view of the fixing member shown in FIG.

Figure 4 is a partial cross-sectional view illustrating a state of use of the corrugated steel pipe connection device according to the present invention.

Claims (2)

In the connecting device of the corrugated steel pipe comprising a connection member 10 is inserted into both sides of the cut portion of the corrugated steel pipe to be connected, and a pair of fixing members (12, 12 ') respectively fixed to the corrugated steel pipe to be connected, The connecting member 10 has an inner metal ring 16, an outer metal ring 18, and a rubber ring 20 fixed to the center of the outer circumferential surface of the inner metal ring 16 and the inner circumferential surface of the outer metal ring 18. It consists of, the water-expandable resin layer (22, 22 ') is bonded to both sides of the rubber ring 20, the fixing member (12, 12') is an open ring type elastic ring (28,28) '), And both ends of the open ring elastic rings 28 and 28' are provided with fastening protrusions 32 and 32 'having long holes 34 and 34', and the open ring elastic rings ( 28, 28 ') is provided with at least two ribs 36 having a long hole 38 at the outer periphery of the open ring type elastic ring (2). 8, 28 ') and the first tightening bolts 42, 42' and nuts 44, 44 'are fastened to the fastening protrusions 32, 32' so as to be in close contact with the valleys of the corrugated steel pipes to be connected, respectively. The ribs 36 are fixed to the valleys of the corrugated steel pipes to be connected to each other so that the open ring elastic rings 28 and 28 'facing each other can be pulled together so that the corrugated steel pipes to be connected can be fixed in the pulled state. A connector of a corrugated steel pipe, characterized in that it comprises a second tightening bolt (46, 46 ') and a nut (48, 48') fastened to the field. According to claim 1, wherein the first tightening bolts (42, 42 ') and the second tightening bolts (46, 46') is provided with a angular neck 52 on the head 50, the tightening protrusions (32, 32) ') Long hole (34,34'), and the connector of the corrugated steel pipe, characterized in that it is not rotated when fitted in the long hole (38) of the ribs (36).

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