KR102228225B1 - Grooved coupler having enhanced response speed of water tight - Google Patents

Abstract

Disclosed is a grooved coupler having an enhanced watertight response speed. According to the present invention, the grooved coupler is joined with a groove of each pipe by being placed between two pipes for connecting the two pipes in a grooved mechanical pipe joining system, comprising: gaskets (100, 110) which include an elastic part in an overall ring shape, made of square pipes limiting a hollow part from the outer side of the ring shape when viewed from an incised part of the ring shape, thereby being inclined from the center of the square pipe toward both edges on a lower side and an upper side of the square pipe, and an elastic band (93) which communicates with the elastic part in the inner side of the ring shape to expose the inside of the elastic part radially toward a central shaft of the ring shape; and a first housing and a second housing. The pressurizing pipe has a circular arc shape, and has a radius of curvature different from that of the gaskets. Protruding units (10A) are installed as a medium between two partition walls (PW) forming the elastic band (93) to protrude from the PW toward the inside for a certain thickness. The protruding units are installed apart from each other for a certain distance along the elastic band (93) forming a strap shape. The length (L1) of the protruding units is shorter than the distance (L2) between the two protruding units.

Description

Grooved coupler having enhanced response speed of water tight}

The present invention relates to a grooved coupler that is positioned between two pipes in a grooved mechanical pipe joining system and is coupled to a groove provided at an end of an individual pipe. It relates to a grooved coupler to which an improved and improved gasket is applied.

In general, a grooved mechanical pipe joining system (also referred to as a'non-welded pipe joining system') is a sealing part, a pipe grooved on two outer circumferential surfaces, a lower pipe housing, and an upper pipe. It consists of a housing and a screw member.

After the sealing part is accommodated in the lower pipe housing and the upper pipe housing having a rough ring shape, the two pipes may be inserted through both sides of the lower pipe housing and the upper pipe housing, or separated from the lower pipe housing and the upper pipe housing. have. Here, the lower pipe housing and the upper pipe housing are made of metal, and the sealing part is made of rubber.

Here, after two pipes are inserted into the lower pipe housing and the upper pipe housing, the sealing portion is positioned between the two pipes in the lower pipe housing and the upper pipe housing to surround the end of the individual pipe. The screw members are located on both sides of the two pipes, penetrate through the lower pipe housing and the upper pipe housing, and helically fasten the lower pipe housing and the upper pipe housing.

The lower pipe housing and the upper pipe housing are coupled with the grooves of the two pipes while applying a compressive force to the sealing portion while being engaged with the screw member. Through this, the mechanical grooved piping fastening system shortens the work time more than the piping fastening system using welding, screws and flanges. Meanwhile, the mechanical grooved pipe fastening system may be described in more detail in FIGS. 1 and 2.

FIG. 1 is a front view showing a positional relationship between a grooved coupler and a pipe in a mechanical grooved pipe fastening system according to the prior art. Referring to FIG. 1, the mechanical grooved pipe fastening system 70 includes a grooved coupler 50 and a pipe 60 grooved on two outer circumferential surfaces. The grooved coupler 50 includes a sealing part 10, a lower pipe housing 20, an upper pipe housing 30, and a screw member 40.

The coupling relationship between the sealing part 10, the lower pipe housing 20, the upper pipe housing 30, the screw members 40 and the pipe 60 has already been described above. Here, while the lower pipe housing 20 and the upper pipe housing 30 are spirally fastened through the screw members 40, the lower pipe housing 20 and the upper pipe housing 30 connect the screw members 40 to each other. Accordingly, two pressing forces P1 and P2 are formed toward each other.

Specifically, the lower pipe housing 20 and the upper pipe housing 30 press the lower side and the upper side of the sealing part 10 according to two pressing forces P1 and P2, and A total pressing force P3 is applied to the sealing part 10.

The combined pressing force P3 crumples the sealing portion 10 around the screw 40 to form an undesired shape 15 from the circumference of the sealing portion 10 toward the center of the sealing portion 10. While the two pipes 60 are inserted into the grooved coupler 50 through both sides of the grooved coupler 50, the ends of the two pipes 60 are surrounded by the sealing portion 10, The sealing part 10 forms an undesired shape 15 around the screw member 40 and forms a gap between the ends of the two pipes 60 in an undesired shape 15. It provides the cause of leakage during the flow of liquid to the dog's piping (60).

2 and 3 are cross-sectional views illustrating a mechanism of a grooved coupler taken along the cutting line of FIG. 1. 2 and 3, while the grooved coupler 50 is coupled with the two pipes 60, the grooved coupler 50 is in contact with the outer circumferential surface of the individual pipe 60 It is fitted into the formed groove (G) and is coupled to the groove (G). In the grooved coupler 50, the upper pipe housing 30 pressurizes the sealing portion 10 to surround the end of the individual pipe 60.

Here, the sealing portion 10 is due to the shape made on the individual pipe 60 and is slightly inclined from the end of the individual pipe 60 to lift. The sealing part 10 has a first thickness t1 in the upper pipe housing 30 and defines a first hollow C1 therein. Here, while the liquid flows along the flow line (F) inside the two pipes (60), the liquid is branched into the first flow line (F1) between the two pipes (60), and the sealing part (10) It flows into the first hollow (C1) of and presses the sealing part 10 so that the sealing part 10 has a second thickness t2 reduced from the first thickness t1.

In addition, the sealing portion 10 has a second hollow (C2) expanded from the first hollow (C1) by the pressure of the liquid according to the first flow line (F1) from the outer surface of the individual pipe (60). It is spaced apart to form a gap between the sealing part 10 and the individual pipe 60. The liquid may flow through the gap between the sealing part 10 and the individual pipe 60 by newly branching the second flow line F2 from the flow line F. On the other hand, the mechanical grooved pipe fastening system is disclosed as a prior art in Korean Patent Publication No. 10-1244771.

A conventional grooved coupler structure for solving this problem is disclosed in Korean Patent Application Laid-Open No. 10-2018-0131215. It is designed to prevent liquid from leaking onto individual pipes because it comes into contact or close contact with the pressing surfaces of the first coupling housing and the second coupling housing without creases.

4 is an exploded view showing a conventional grooved coupler. Referring to FIG. 4, the grooved coupler 170 according to the present invention is located between two pipes 60 to connect the two pipes in a grooved mechanical pipe joining system. It is fastened to the groove (G) of the individual pipe (60).

Here, the grooved coupler 170 includes a gasket 100, a first coupling housing 150, a second coupling housing 160, and a screw member (40 in FIG. 1). When viewed as a whole, the gasket 100 has a ring shape and includes an elastic material such as rubber or synthetic resin.

The first coupling housing 150 and the second coupling housing 160 accommodate the gasket 100 along the circumference of the gasket 100 to form the first coupling housing 150 and the second coupling housing 160. ) It is possible to partially expose the gasket 100 between. Here, the two pipes 60 are inserted to face each other between the first and second coupling housings 150 and 160. The two pipes 60 contact the gasket 100 partially exposed from the first coupling housing 150 and the second coupling housing 160. The first coupling housing 150 and the second coupling housing 160 may be made of metal.

The screw members 40 are inserted into the screw holes H of the first coupling housing 150 and the second coupling housing 160 to be inserted into the first coupling housing 150 and the second coupling housing 160. ) Can be screwed together. Here, while the first coupling housing 150 and the second coupling housing 160 are spirally fastened, the first coupling housing 150 and the second coupling housing 160 are It is possible to press the gasket 100 toward the center.

However, the grooved coupler disclosed in the above patent has improved watertightness and improved watertightness error due to its gasket, but the reaction rate of water supply to the cavity is insufficient, so when the joint part is momentarily twisted, such as an earthquake. There is a problem that watertightness can be broken.

The present invention was developed to solve the above problems, and the technical problem to be achieved by the present invention is a grooved coupler that is located between two pipes in a mechanical grooved pipe fastening system and is coupled to a groove provided at the end of an individual pipe. In order to improve the watertight reaction rate, it is to provide a grooved coupler with an improved gasket structure.

In order to connect the two individual pipes 60 in a grooved mechanical pipe joining system, the grooved coupler having improved watertight reaction speed according to the present invention for achieving the above object is the two individual pipes ( 60) as a grooved coupler (grooved coupler) that is located between and fastened to the groove (G) of the individual pipe (60),
When viewed as a whole, it forms a ring shape, and when viewed from the incision of the ring shape, it consists of a square tube defining a hollow at the outer periphery of the ring shape, and both edges from the center of the square tube at the lower side and the upper side of the square tube And an elastic part inclined toward, and an elastic band (93: elastic band) that communicates with the elastic part at the inner periphery of the annular shape to radially expose the inside of the elastic part toward the central axis of the annular shape. A gasket (100, 110); And
In order to receive the gaskets 100 and 110 at the lower and upper sides of the gaskets 100 and 110, respectively, the grooves G are in contact with the outer circumferential surfaces of the individual pipes 60 and are inserted into the grooves G formed on the outer circumferential surfaces. Including a first coupling housing 150 and a second coupling housing 160 coupled to ),
Between the two partition walls (PW) constituting the elastic band (93), a protrusion (10A) protruding from the partition wall (PW) to the inside by a certain thickness is installed as a medium and along the elastic band (93) forming a strip shape. It is installed spaced apart by a certain distance, and the length (L1) of the protrusions is installed smaller than the separation distance (L2) between the protrusions,
The protrusion 10A includes a depression 932 formed stepped inward from the bottom surface 930 of the partition wall PW,
The gasket 110 includes a strip-shaped cutout 95 along the outside of the partition wall PW of the elastic part 91, and a strip-shaped metallic support plate 96 is forcibly fitted to the cutout 95. It is characterized by being inserted.

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The grooved coupler with improved watertight reaction rate according to the present invention is positioned between two pipes in a mechanical grooved pipe fastening system to improve watertight reaction speed in a grooved coupler coupled to a groove provided at the end of an individual pipe. In order to improve the structure of the gasket, the reaction rate of water supply to the cavity is insufficient, so that even when the joint is momentarily twisted, such as an earthquake, there is an effect that the watertightness is not broken.

1 is a front view showing a positional relationship between a groove coupler and a pipe in a mechanical grooved pipe fastening system according to the prior art;
2 and 3 are cross-sectional views for explaining a mechanism of a grooved coupler taken along the cutting line of FIG. 1;
4 is an exploded view showing a conventional grooved coupler,
5 is a perspective view showing an improved gasket structure applied to a grooved coupler with improved watertight reaction speed according to the present invention;
6 is a partially cut-away perspective view showing the structure of the gasket of FIG. 5;
7 is a cross-sectional view showing the structure of the gasket of FIG. 5;
FIG. 8 is a cross-sectional view showing the gasket taken along the cutting line Ⅰ-Ⅰ' of FIG. 6;
9 is a cross-sectional view showing the gasket taken along the cut line II-II' of FIG. 6, and
10 is a partial cutaway perspective view showing a characteristic detailed structure of a gasket applied to a grooved coupler according to another embodiment of the present invention, and
11 is a cross-sectional view showing the gasket taken along the cutting line III-III' of FIG. 10;

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

5 shows a structure of a gasket for a grooved coupler with improved watertight reaction speed according to the present invention, and FIG. 6 shows the structure of the gasket of FIG. 5 as a partially cut perspective view, and FIG. 7 shows the gasket of FIG. 5 Is shown as a cross-sectional view.

5 to 7, the gasket 100 has a ring shape as shown in FIG. 5 when viewed as a whole. In more detail, the gasket 100 may include an elastic part 91 on the outside of the ring shape and an elastic band 93 on the inside of the ring shape, as seen in FIG. 7 from a ring-shaped incision; elastic band).

The elastic portion 91 has a larger width than the elastic band 93 along the annular central axis (X in FIG. 7 ). The elastic part 91 is made of a square tube defining a hollow C1 and is inclined toward both edges from the center of the square tube at the lower side and the upper side of the square tube as shown in FIG. 6. The elastic part 91 has an outer wall (OW) and an inner wall (IW) facing the outside and the inside of the gasket 100, respectively, as shown in FIGS. 5, 6, or 7.

The outer side wall OW and the inner side wall IW are inclined with respect to the annular central axis X as shown in FIG. 6 or 7. More specifically, the outer side wall OW and the inner side wall IW are inclined at an angle as shown in FIG. 7 in a radial direction toward a direction inclined with respect to the annular central axis X. The outer sidewall OW and the inner sidewall IW have a smooth surface as shown in FIG. 7.

The outer side wall OW is inclined more than the inner side wall IW with respect to the annular central axis X. More specifically, the inner sidewall IW is inclined as shown in FIG. 7 at a first angle θ1 with respect to the annular central axis X. The outer sidewall OW is inclined as shown in FIG. 7 at a second angle θ2 greater than the first angle θ1 with respect to the annular central axis X.

The outer sidewall OW has both edges higher than the central area in the outer sidewall OW as shown in FIG. 6 or 7.

Meanwhile, the elastic band 93 communicates with the elastic portion 91 to radially expose the inside of the elastic portion 91 toward the annular central axis X as shown in FIG. 7.

More specifically, the elastic band 93 includes two partition walls (PW) protruding from the inner side walls IW as shown in FIG. 6 or 7. The two partition walls PW are positioned in parallel on the inner sidewall IW to expose the inside of the elastic part 91 to the outside. Here, the inner sidewall IW forms a right angle with the elastic band 93.

The characteristic structure of the gasket for a grooved coupler with improved watertight reaction speed according to the present invention is a partition wall (PW) between two partition walls (PW) forming the elastic band 93 as shown in Figs. A protrusion 10A protruding inward from PW) by a predetermined thickness is provided as a medium. The protruding thickness is preferably such that the protrusions 10A do not meet each other from the center of the two partition walls PW.

In addition, the protrusions 10A are installed to be spaced apart from each other by a predetermined distance along the elastic band 93 forming a strip shape, and the length L1 of the protrusions is installed smaller than the separation distance L2 between the protrusions.

FIG. 8 is a cross-sectional view of a gasket cut along the cut line Ⅰ-Ⅰ' of FIG. 6, and FIG. 9 is a cross-sectional view of the gasket cut along the cut line Ⅱ-II' of FIG. 8 and 9, the protrusion 10A includes a depression 932 formed stepped inward from the bottom surface 930 of the partition wall PW. If the cross section of the pipe is in contact with the outer side of the partition wall PW and the width is "D1", the inner side 934 has a protrusion 10A as shown in FIG. The width is wider than that of the part.

The grooved coupler is applied in a seismic environment where it is required to be resistant to vibration due to its fluidity.At this time, water is rapidly injected into the inner first hollow (C1) and the pressure is applied to the gasket to expand, so that a certain watertightness is required. In the gasket for a grooved coupler according to the present invention, a protrusion 10A protruding from the partition wall PW inward by a certain thickness is installed between the two partition walls PW constituting the elastic band 93. As a result, even when a stress is applied to the pipe and water escapes from a part of the first hollow C1 and the adhesion is momentarily deteriorated, the possibility of leakage of water from the gasket can be significantly reduced because water is introduced quickly.

That is, according to the prior art, when stress is applied to the pipe, water escapes from a part of the hollow and the adhesion is momentarily deteriorated.In particular, when stress is applied that the pipes are close to each other, water is not quickly supplied between the elastic bands. It is worth noting that this solves the problem that leakage may occur from the gasket.

Further, the protrusion 10A has a recessed portion 932 formed stepped inward from the bottom surface 930 of the partition wall PW. This provides a degree of freedom so that the end of the partition PW can be deformed in the direction of the stress and twist while maintaining the rapid inflow of water into the hollow C1 by the protrusion 10A when excessive stress or twisting occurs in both pipes. It is possible to prevent the occurrence of instantaneous lifting between the partition wall PW and the pipe by giving it. That is, when there is no depression 932, the protrusion 10A acts as a lever with respect to the partition wall PW, and thus the partition wall ( PW) and piping may be momentarily lifted, causing leakage.

FIG. 10 is a partial cut-away perspective view showing a characteristic detailed structure of a gasket applied to a grooved coupler according to another embodiment of the present invention, and FIG. 11 shows a gasket cut along the cutting line III-III' of FIG. It is shown as a cross-sectional view.

10 and 11, the gasket 110 according to another embodiment of the present invention has a shape similar to that of the gasket 100 of FIGS. 5 to 7, but the gasket 110 is an elastic part 91 A belt-shaped cutout 95 is provided along the outer side of the partition wall PW, and a band-shaped metallic support plate 96 is inserted into the cutout 95 by force fitting.

In order to evaluate the effect of the grooved coupler according to the present invention, a grooved coupler of three examples and one comparative example was designed. The main conditions are as follows.

[Example 1]

Grooved coupler, a structure in which a protrusion is provided on a gasket coupled to the grooved coupler but a recessed part is not provided

[Example 2]

A structure including a grooved coupler and a protrusion and a depression in a gasket coupled to the grooved coupler

[Example 3]

A structure comprising a grooved coupler, a protrusion, a cutout, and a metallic support plate in a gasket coupled to the grooved coupler

[Comparative Example 1]

Grooved coupler, no protrusions in the gasket that is coupled to the grooved coupler

20 pipes of the structure designed as described above are arranged, and an artificial situation in which bending, bending, or torsional load or pressure is applied to the pipe corresponding to external shock or vibration due to earthquake, etc. is provided. After that, it was visually checked whether there was any leakage at the joint of the pipe.

At this time, in the first environment, relatively low vibration was provided at 25°C corresponding to room temperature, and in the second environment, medium vibration was provided at 25°C corresponding to room temperature. After 48 hours elapsed in a harsh environment of 60° C., an environment of medium vibration as in the second environment was provided. The vibration generator used JIANQUAO's model name JQ-1000 vibration tester that complies with the IEC-68-2-6 and JJG190-1997 standard test standards, and the variation was 3mm p-p.

As for the results of visual inspection of leakage, ◎ indicates no leakage at all, ○ indicates that only traces of leakage are found in less than 5 pieces, but no persistent leakage, △ indicates that small amounts of persistent leakage occur in less than 5 pieces, × indicates 5 pieces. It was shown that watertight destruction occurred with a continuous trace amount of leakage or less than five.

division In the first environment
Whether there is leakage In the second environment
Whether there is leakage In the third environment
Whether there is leakage Remark
Example 1

◎
○
○
projection part
Example 2

◎
◎
○
Protrusions and depressions
Example 3

◎
◎
◎ Protrusions and Incisions/Metal Support Plates
Comparative Example 1

○
△
×
No protrusions

Referring to Table 1, in a relatively low vibration situation in the first environment, no leakage occurred in Examples 1 to 3, whereas in Comparative Example 1 in which the gasket was not provided with a protrusion, a trace amount of leakage occurred. In the case of medium vibration in the second environment, traces of leakage occurred in the first embodiment in which the gasket was not provided with a depression, and in Comparative Example 1, when the gasket was not provided with a protrusion, a trace amount of continuous leakage was observed in less than five cases. Confirmed. In the case of providing the temperature and medium vibration conditions of the harsh environment, it was found that there was no leakage of any liquid in the structure provided with the grooved coupler and the protrusion and the cutout and the metallic support plate in the gasket coupled to the grooved coupler. In the case of the second embodiment without the incision and the metallic support plate, it was found that the durability was slightly deteriorated due to the occurrence of minute leakage in a harsh environment.

The gasket made as described above has a strip-shaped cutout 95 along the outside of the partition wall PW of the elastic part 91, and the strip-shaped metallic support plate 96 is forcibly fitted to the cutout 95. By being inserted, the stress applied to the partition wall PW of the gasket 110 is evenly distributed and deformation is suppressed. Therefore, when stress is applied to the gasket 110, due to the protrusion 10A, for example, in the gasket made of a soft rubber material, a gap between the partition wall PW corresponding to the portion between the protrusions 10A and the pipe end face is instantaneously separated. It has the effect of reducing the likelihood of this occurring. In addition, the metallic support plate 96 is inserted and fixed around the partition wall PW to prevent the portion between the protrusions 10A from being pushed inward due to a long-term stress, thereby reducing the possibility of leakage. Durability can be further improved.

100: gasket
91: elastic portion 93: elastic band
OW: outer sidewall IW: inner sidewall
X: ring-shaped central axis
θ1: first angle
θ2: second angle
PW: bulkhead
10A: protrusion
932: depression 934: inner
95: band-shaped incision
96: metallic support plate

Claims (3)

In order to connect two individual pipes 60 in a grooved mechanical pipe joining system, it is located between the two individual pipes 60 and is fastened to the groove G of the individual pipes 60. In a grooved coupler,
When viewed as a whole, it forms a ring shape, and when viewed from the incision of the ring shape, it consists of a square tube defining a hollow at the outer periphery of the ring shape, and both edges from the center of the square tube at the lower side and the upper side of the square tube And an elastic part inclined toward, and an elastic band (93: elastic band) that communicates with the elastic part at the inner periphery of the annular shape to radially expose the inside of the elastic part toward the central axis of the annular shape. A gasket (100, 110); And
In order to receive the gaskets 100 and 110 at the lower and upper sides of the gaskets 100 and 110, respectively, the grooves G are in contact with the outer circumferential surfaces of the individual pipes 60 and are inserted into the grooves G formed on the outer circumferential surfaces. Including a first coupling housing 150 and a second coupling housing 160 coupled to ),
Between the two partition walls (PW) constituting the elastic band (93), a protrusion (10A) protruding from the partition wall (PW) to the inside by a certain thickness is installed as a medium and along the elastic band (93) forming a strip shape. It is installed spaced apart by a certain distance, and the length (L1) of the protrusions is installed smaller than the separation distance (L2) between the protrusions,
The protrusion 10A includes a depression 932 formed stepped inward from the bottom surface 930 of the partition wall PW,
The gasket 110 includes a strip-shaped cutout 95 along the outside of the partition wall PW of the elastic part 91, and a strip-shaped metallic support plate 96 is forcibly fitted to the cutout 95. Grooved coupler, characterized in that inserted.
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