KR102732790B1 - No hub coupling joint unit for Pipes - Google Patents

Abstract

The present invention relates to a straight pipe no-hub coupling joint unit configured to easily and quickly connect the ends of various synthetic resin straight pipes, such as sewage pipes or underground horizontal pipes installed inside and outside a building structure.
The present invention relates to a structure for mutually connecting the ends of straight pipes installed inside and outside of a building structure by a coupler, wherein the coupler comprises a body divided on one side of an outer diameter so as to be opened and closed, assembled by a hinge, and configured to be loosened and tightened at the same time using a single fastening element, and an accommodating groove is formed on the inner diameter side of the body by a catch protruding inward from both edges, and within the accommodating groove, there are disposed a ring stopper for fixing the positions of the ends of the straight pipes on both sides to be mutually connected, an elastic iron piece mounted on the outer circumferential surface of the ring stopper and closely fixed to the outer diameter of the straight pipe, and a rubber ring for preventing leakage between the catch and the elastic iron piece of the coupler.

Description

No hub coupling joint unit for pipes {No hub coupling joint unit for pipes}

The present invention relates to a straight pipe no-hub coupling joint unit configured to easily and quickly connect the ends of various types of synthetic resin straight pipes, such as sewage and drainage pipes or underground horizontal pipes installed inside and outside a building structure.

In general industrial plants, buildings, apartment buildings, and other architectural structures, pipes manufactured in various forms are installed to transport fluids necessary for daily life, such as cold, hot water, and gas, as well as sewage, to their respective destinations.

Most pipes can expand or contract due to changes in the surrounding temperature and the pressure of the fluid being transported, or they can be damaged or deformed by external shocks such as micro-earthquakes or temperature differences such as thermal expansion, which can cause leaks.

In addition, in the case of multi-family housing such as apartments, in order to compensate for the expansion of pipes, loop pipes that require a relatively large amount of space are installed in the basement, or in the case of elevated pipes, guides are provided on both sides of the expansion joint area, and anchors are installed at both ends.

Normally, synthetic resin straight pipes used for piping are manufactured by drawing them out using dies of various diameters, so they can be cut to the length required on site or extended by assembling them together using various types of fastening structures between the pipes.

An example of such a connecting method of intuition is as shown in FIG. 1, which comprises a joint body (2) having an insertion port (3), a clamp ring (5) having a slit formed therein for tightening an end of a pipe fitted to the outside of the insertion port (3) with an elastic tightening force, an expanding piece (6) that is releasably fitted and supported by being bounced in the slit in the outer direction so as to expand the diameter of the clamp ring (5) against the elastic force of the clamp ring (5), and a regulating sleeve (10b) fitted to the outside of the clamp ring (5) to regulate the radial bounce motion of the expanding piece (6).

However, this conventional pipe joint method cannot secure a reliable pipe joint if the expansion piece does not completely fall off or if the expanded piece that has been thrown out is caught between the cover and the regulation sleeve. In addition, when the expansion piece that was inserted into the slit of the clamp ring falls off and the clamp ring contracts due to elastic restoring force to fix the outer surface of the pipe, the outer surface of the pipe cannot be completely compressed at the part where the expansion piece of the clamp ring was inserted, so there is a risk of fluid leakage when the internal pressure of the pipe is high.

In addition, when a cover is used to prevent the expansion piece separated from the clamp ring from being thrown out, the expansion piece is maintained in the space between the regulation sleeve, the outer surface of the pipe, and the cover, so when the pipe joint on which the pipe is installed is rotated to connect to another pipe, interference occurs, causing considerable inconvenience in the connection work.

Meanwhile, many public notices, including registered patents No. 0941883 and No. 0976588, disclose technologies for "pipe connecting parts" that aim to prevent the connecting part from twisting when connecting pipes, ensure that multiple bolts for fastening are fastened at the same depth, and maintain watertightness by forming one side of the packing into a double-ended part. However, all of these structures require screw fastening force, so workability is very poor. Furthermore, since they are composed by combining multiple parts, they inevitably end up being quite expensive.

Patent registration No. 0941883 (registered on February 4, 2010): Pipe connection. Patent registration No. 0976588 (registered on August 11, 2010): Piping connection. Patent registration No. 1523307 (registered on May 20, 2015): Pipe connection assembly. Patent No. 1891081 (registered on August 17, 2018): Pipe connection assembly.

The present invention has been made in consideration of the problems of the above-mentioned prior art, and the main purpose of the present invention is to provide a no-hub coupling joint unit for straight pipes, which can save materials and greatly improve workability by enabling the ends of straight pipes to be interconnected to be easily connected using a single coupler.

In addition, another purpose of the present invention is to provide a no-hub coupling joint unit for a straight pipe, which can suppress adverse effects such as a straight pipe being pushed and detached due to pressure generated inside the straight pipe, and more reliably prevent leakage occurring at a joint portion of the straight pipe.

In order to achieve the above-mentioned purpose, the present invention provides a straight pipe no-hub coupling joint unit, which is a structure for mutually connecting the ends of straight pipes installed inside and outside a building structure by a coupler, wherein the coupler is configured such that a body divided on one side of an outer diameter so as to be opened and closed is assembled by a hinge and can be loosened and tightened using a single fastening element, and an accommodating groove is formed on the inner diameter side of the body by a catch protruding inward from both edges, and within the accommodating groove, a ring stopper for fixing the ends of the straight pipes on both sides to be mutually connected in position, an elastic iron piece mounted on the outer circumferential surface of the ring stopper and closely fixed to the outer diameter of the straight pipe, and a rubber ring for preventing leakage between the catch and the elastic iron piece of the coupler.

In addition, the elastic steel piece is composed of a wide belt-shaped sealing ring that is inserted and fixed into the receiving groove of the coupler and a tie ring that is fixedly installed on both sides of the inner surface of the sealing ring, and the tie ring is configured to have elasticity by forming cut grooves and holes at equal intervals on the inner diameter side.

In addition, the rubber ring can be configured so that when pressure is generated inside the pipe, elastic force is applied to the entire circumference of the edge portion by the groove formed inwardly while being interposed within the two-sided catches of the coupler.

The present invention, having the features described above, can easily connect the ends of a synthetic resin material straight pipe manufactured to a predetermined length using a single coupler in a one-touch manner, so that a joint pipe or socket with a hub formed therein, or a separate coupler, as in the past, is not required, thereby reducing consumable materials.

In addition, it can greatly improve workability as it can be done simply and quickly by reducing the overall man-hours of the worker.

In addition, by using an elastic steel piece installed in the coupler, it is possible to suppress the phenomenon of the straight pipe being pushed out even when pressure is generated inside the straight pipe, and more reliably prevent water leakage occurring at the connecting portion of the straight pipe.

Figure 1 is a cross-sectional diagram showing an example of a typical pipe joint structure.
Figure 2 is a cross-sectional diagram of Figure 1.
Figure 3 is a drawing showing a separated state of a pipe connection assembly device disclosed in Korean Patent No. 1678379.
Fig. 4 is a cross-sectional view of the combined state of Fig. 3.
Figure 5 is an enlarged view of the “A” portion of Figure 4.
Figure 6 is a perspective view of the assembled state of the coupler.
Figure 7 is a perspective view of the coupler in an exploded state.
Figure 8 is a planar configuration diagram of the coupler.
Fig. 9 is an enlarged cross-sectional view taken along line AA of Fig. 8.
Figure 10 is an exploded perspective view showing a straight coupling joint unit according to the present invention.
Figures 11a and 11b are cross-sectional views of the assembled and disassembled state of the intuition.
Figures 12a and 12b are perspective and cross-sectional views of the ring stopper.
Figures 13a and 13b are perspective and cross-sectional views of an elastic steel piece.
Figures 14a and 14b are perspective views and plan views showing the binding ring installed in the elastic steel piece.
Figures 15a and 15b are perspective and cross-sectional views of a rubber ring.

The specific structural or functional descriptions below are merely illustrative for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms.

First, as a preferred example to which the present invention is to be applied, the core technology disclosed in the prior registration patent No. 1678379 is extracted and explained, and then problems related thereto are derived, and then the configuration and operational effects of the present invention are described.

As illustrated in FIGS. 3 to 9, the pipe connection assembly device disclosed in the prior registration patent comprises a joint pipe (10) in which an expanded portion (12) having an inner inclined end (12a) and an outer inclined end (12b) is formed on the inner and outer surfaces of both ends, and an annular blocking projection (14) is formed so that an end of a straight pipe (1) is caught, a pressing member (20) that is seated on the inner inclined end (12a) of the expanded portion (12) constituting the joint pipe (10) to pressurize the outer surface of the straight pipe (1), and a coupler (50) that wraps around the outer surface of the pressing member (20) and applies a tightening force inward.

The above-mentioned pressurizing member (20) is composed of an elastic ring (30) made of rubber, which is formed by an outer mounting portion (32) that is mounted inside the inner inclined end (12a) of the expanding portion (12) and an inner annular curved portion (34) having a number of inclined projections (34a) protruding from the inner surface, and a pressurizing sealing ring (40) that has an inner inclined portion (42) in which a curved fitting groove (42a) that is mounted on the inner annular curved portion (34) of the elastic ring (30) is formed to extend inside and whose outer surface is in close contact with both ends of the expanding portion (12).

The above coupler (50) is composed of first, second, and third clamps (52, 53, 54) that are assembled in a circular shape by forming a tape groove (51) extending inside to wrap around the outer inclined end (12b) of the joint pipe (10) and the outer inclined portion (42) of the pressure sealing ring (40), a rotating member (60) that is provided correspondingly between the first, second, and third clamps (52, 53, 54) so that the first, second, and third clamps (52, 53, 54) can be assembled in a circular shape, and a tightening force maintaining member (70) that maintains a tightening force so that the first, second, and third clamps (52, 53, 54) are in a circular shape.

The above-mentioned rotating member (60) is composed of first and second protrusions (61, 62) protruding outwardly from the ends of the first and third clamps (52, 54), horizontal rotating projections (63, 64) protruding integrally from both ends of the first and second protrusions (61, 62), first and second fixed protrusions (67, 68) having a front gap (65) and a rear gap (66) into which the first and second protrusions (61, 62) and the horizontal rotating projections (63, 64) are inserted, and a rotating hole (69) that penetrates corresponding to the first and second fixed protrusions (67, 68) and into which the horizontal rotating projections (63, 64) are inserted so as to be rotatable.

The above-mentioned tightening force maintaining member (70) is formed integrally to correspond to both ends of the first and third clamps (52, 54) and is composed of a fixed projection (72, 73) having an assembly hole (71), a fastening bolt (74) inserted through the assembly hole (71) of the fixed projection (72, 73), and a tightening force maintaining nut (75) that is connected to the fastening bolt (74) to maintain the tightening force of the first, second, and third clamps (51, 52, 53) in a circular shape.

In addition, an anti-idle rotation groove (76) is formed on the outer surface of the assembly hole (71) formed in the above-mentioned fixed protrusion (72, 73) to prevent idling by combining a tightening force maintaining nut (75).

Meanwhile, a plurality of pin assembly grooves (80) are formed on the outer inner surface of the tape groove portion (51) of the first, second, and third clamps (52, 53, and 54), and a pipe stop pin (82) having a pointed portion (82a) formed to protrude inwardly in the pin assembly groove (80) is fastened and fixed, thereby preventing the straight pipe (1) from being detached by hooking to the outer surface of the straight pipe (1) inserted inward.

However, in these prior technologies, since a separate joint pipe must be interposed between the two straight pipes and the coupler must be installed on each side, this not only increases the unit price due to an increase in consumable materials, but also significantly reduces workability.

In addition, since the elastic ring and the pressure sealing ring made of rubber are in direct contact with the outer surface of the straight pipe and cause interference, the insertion operation of the straight pipe is not performed smoothly.

In addition, since the structure is such that the stop pin is fixed and protrudes inwardly into the tapered groove of the coupler to prevent the straight pipe from coming off, there are difficulties in the manufacturing process, and if the pressure generated inside the straight pipe exceeds approximately 2 kg/cm2, the fixing force of the stop pin cannot withstand it, causing the straight pipe to come off.

The present applicant has considered various problems in the prior art and intends to propose a joint structure that not only makes the straight pipe connection work by a coupler easier, but also maintains a stronger and more stable structure so that the connecting pipe is not pushed out even when internal pressure is generated, and this will be described in detail with reference to a and b of FIGS. 10 to 15.

As illustrated in each of these drawings, the present invention is configured so that the ends of the straight pipes (110) installed inside and outside the building structure can be mutually connected in a one-touch manner by a single coupler (120).

That is, the above-mentioned straight pipe (110) is intended to induce fluid flow, and as before, can be manufactured into various diameters by a conventional drawing molding method, and in most cases, the ends of the straight pipe (110) drawn to a certain length according to the design specifications of the building structure are connected using a coupler (120).

This coupler (120) is configured to be loosened or tightened using a fastening element consisting of a bolt (124a) and a nut (124b), as the body (121) divided into two parts so that it can be opened and closed is assembled by a hinge (122) and a flange (123b) having a through hole (123a) on the other side is formed.

In Fig. 10, the body (121) is shown as being divided into two and opened and closed by one hinge (122) and a fastening element, but it is of course possible to divide the body into three and then configure it to be opened and closed by using two hinges and one fastening element .

On the inner diameter side of the body (121) constituting the above coupler (120), a receiving groove (126) is formed by a catch (125) protruding inward from both edges.

In addition, a ring stopper (130) for fixing the position of an end of a straight pipe (110) assembled on both sides, an elastic iron piece (140) that is elastically mounted on the outer circumferential surface of the ring stopper (130) to fix the straight pipe (110), and a rubber ring (150) for preventing leakage of fluid within the straight pipe (110) are disposed within the receiving groove (126) of the coupler (120).

As shown in a and b of FIG. 12, the ring stopper (130) has a protruding projection (132) formed in the center of the inner diameter of the cylindrical body (131) so that when the straight pipe (110) is inserted from both sides and assembled, the end of the straight pipe (110) is caught and maintained, thereby determining the insertion position.

In addition, as shown in a and b of FIG. 13, in the case of the elastic steel piece (140), it is composed of a relatively wide belt-shaped sealing ring (141) so that it can be inserted and fixed into the receiving groove (126) of the coupler (120), and a pair of fastening rings (142) fixedly installed on both sides of the inner surface of the sealing ring (141).

A ring stopper (130) is inserted between the two binding rings (142) of the elastic steel piece (140) and is fixed tightly to the outer diameter of the straight pipe (110).

As shown in a and b of Fig. 14, the bonding ring (142) is mounted on the inner surface of the sealing ring (141) with a gap therebetween using a fixing method such as spot welding, and is configured so that the inner diameter side has a slight incline.

In addition, since cut grooves (143a) and through holes (143b) are continuously formed at equal intervals throughout the entire circumference on the inner diameter side of the above-mentioned binding ring (142), it becomes elastic while being in close contact with the outer diameter side when assembling the straight pipe (110).

As shown in a and b of Fig. 15, the rubber ring (150) is interposed within the two-sided catches (124) of the coupler (120), and at the same time, when pressure is generated inside the straight pipe (110), elastic force is applied to the entire circumference of the edge portion (151b) by the groove (151a) formed inwardly. In other words, it is arranged between the catches (124) of the coupler (120) and the elastic iron piece (140) to prevent water leakage.

By this configuration, when manufacturing an elastic steel piece (140), the outer periphery of a binding ring (142) is fixed by spot welding in 2 to 3 parts on one side of an inner surface of a relatively wide sealing ring (141), and then the cylindrical body (131) of a ring stopper (130) is inserted into the sealing ring (141), and the binding ring (142) is inserted on the other side and fixed by spot welding, thereby allowing the ring stopper (130) to be installed between the binding rings (142) on both sides.

In addition, by inserting a rubber ring (150) into each of the edges on both sides of the sealing ring (141) forming the elastic steel piece (140) and assembling it into the receiving groove (126) of the coupler (120), a single integrated coupler (120) can be formed.

Next, as shown in FIGS. 11a and 11b, the ends of the two straight pipes (110) on both sides are fixed by fitting them toward the protruding projection (132) formed on the ring stopper (130) in the coupler (120), and then the ends of the two straight pipes (110) can be connected by fastening a bolt (124a) to a nut (124b) through a through hole (123a) provided on one side of the body (121) of the coupler (120).

As described above, according to the hubless coupling joint unit for piping according to the present invention, the end of a synthetic resin material straight pipe manufactured to a predetermined length can be easily connected in a one-touch manner using a coupler, so that a hub-formed joint pipe or socket or a separate coupler as in the past is not required, thereby reducing consumable materials.

In addition, it can greatly improve workability as it can be done simply and quickly by reducing the overall man-hours of the worker.

In addition, by using an elastic steel piece installed in the coupler, it is possible to suppress the phenomenon of the straight pipe being pushed out even when pressure is generated inside the straight pipe, and more reliably prevent water leakage occurring at the connecting portion of the straight pipe.

The technical task of the present invention is achieved by the technical configuration as described above, and although it has been described by limited examples and drawings, it is not limited thereto, and it is obvious that various modifications and variations are possible within the technical idea of the present invention and the scope of the claims to be described below by a person skilled in the art in the art.

110: Intuition 120: Coupler
121: Body 122: Hinge
123a: Through hole 123b: Flange
124a: Bolt 124b: Nut
125: hitch 126: receiving groove
130: Ring stopper 131: Cylindrical body
132: Protruding jaw 140: Elastic steel piece
141: Sealing ring 142: Binding ring
143a: Cut-out groove 143b: Through hole
150: Rubber ring 151a: Home
151b: Border

Claims (3)

A structure for connecting the ends of a straight pipe (110) installed inside and outside of a building structure to each other by a coupler (120);
This coupler (120) is configured so that a body (121) that can be opened and closed on one side of the outer diameter is assembled by a hinge (122) and can be loosened and tightened using a single fastening element, and a receiving groove (126) is formed on the inner diameter side of the body by a catch (125) that protrudes inward from both edges;
In this receiving home (126), there is a ring stopper (130) for fixing the positions of the ends of the two-sided straight pipes (110) that are to be connected to each other;
It is composed of a wide belt-shaped sealing ring (141) that is inserted and fixed into the receiving groove of the coupler and a fastening ring (142) that is fixedly installed on both sides of the inner surface of the sealing ring, and the fastening ring is configured to have elasticity by forming cut grooves (143a) and holes (143b) at equal intervals on the inner diameter side, and an elastic iron piece (140) that is mounted on the outer circumferential surface of the ring stopper and fastened to the outer diameter of the straight pipe;
A straight pipe no-hub coupling joint unit characterized in that a rubber ring (150) is disposed between the coupler's catches and the elastic iron piece to prevent leakage, wherein the elastic force is applied over the entire circumference of the edge portion (151b) when pressure is generated inside the straight pipe by a groove (151a) formed inwardly while being interposed within each of the coupler's catches on both sides, and the groove is formed inwardly. delete delete

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