KR102476194B1 - Branch pipe connecting apparatus and the combination apparatus - Google Patents

Abstract

The present invention has a branch pipe combining device (1) installed on a branch hole (200) of an original pipe (100). The branch pipe combining device (1) includes: a combining part (10) for combining a branch pipe to be able to be attached and detached; and a coupling part (20) for coupling the combining device to the branch hole. The coupling part (20) includes a pipe-shaped body coming inside the original pipe through the branch hole and includes a bending part on an end of the body. The combining device (1) is coupled semi-permanently to the original pipe (100) by the coupling part (20). A combiner and a coupling device thereof are adopted in the installation of the combining device (1). The combiner is provided to install the combining device. A worker can couple the combiner to the branch hole (200) by the simple operation of forming the branch hole (200) on the original pipe (100) on the work site and coupling a nut of the coupling device to a coupling bar. Therefore, provided is a branch pipe combining device having a simple structure and capable of being manufactured at low costs.

Description

Coupler and fastening device for coupling branch pipe {BRANCH PIPE CONNECTING APPARATUS AND THE COMBINATION APPARATUS}

The present invention relates to a pipe coupling device for mutually coupling pipes having hollow insides, and more particularly, to a coupling device for coupling a branch pipe to a circle pipe so that hollow portions thereof communicate with each other.

In addition, the present invention relates to a coupler for installing a branch pipe coupling device to a circle pipe, and a fastening device for fastening or coupling the coupling to a circle pipe.

Fluids including gases and liquids are widely used industrially. Transport and delivery of fluids are performed in many facilities and facilities, and there are various means for adjusting the transport path of fluids. Pipes are used to transport fluids. Pipes are connected and branched in various forms to properly transport fluids. To connect the pipes, a pipe fitting or a pipe connecting (combining) device is used. These are also referred to as connection sockets. A pipe connecting device of a simple form has a plurality of fastening parts for interconnecting pipes. There are various types of connection devices, such as I-type, Y-type, and T-type, for example, depending on their shape. Pipe connectors are used to simply connect pipes to each other or to change the path of pipes, that is, the transport path of fluid.

On the other hand, many fluid systems require a means for distributing or branching some fluids from the fluid conveyed through one route, the circle pipe, to another route, the branch pipe. These means are widely used in a wide variety of systems, such as sprinkler systems for fire extinguishing and disaster prevention or watering for relationships, various types of water supply systems, fuel supply systems such as city gas, and heat exchange systems using refrigerants or cooling water.

It is inefficient to employ the above-described pipe connecting device, for example, a T-shaped connecting device, for branching and joining of fluids. In general, in the case of a system requiring branching and joining of fluids, the number of branching points and joining points is very large. It takes a lot of time and money to employ a T-type connector at each of these branching and joining points.

A wide variety of branching structures and coupling devices have been proposed for the effective branching of fluid, that is, the effective coupling of a circle pipe and a branch pipe. Distribution pipe manufacturing method) and Patent Registration No. 10-0886881 (Name: pipe manufacturing device with branch connection and manufacturing method using the same) and Registration Patent No. 10-1179150 (Name: Metal pipe branch pipe manufacturing method and The device) discloses a method of directly forming a structure for connecting a branch pipe to a single pipe. However, since this method requires a separate and complicated device, it is difficult to directly employ and use it in the field.

In addition, Patent Publication No. 10-1993-0004810 (name: adapter assembly for pipe branching), Patent Publication No. 10-2004-0073726 (name: pipe connection structure of heat exchanger), Registration Patent No. 10-0813706 (name : Connection socket for pipe branch), Registration Patent No. 10-0729601 (Name: Branch pipe connector), Registration Patent No. 10-0977053 (Name: Connection socket for pipe branch), Registration Patent No. 10-0959735 (Name: branch pipe connection structure of fluid pipe), Patent Registration No. 10-1056811 (name: branch pipe connection device), and Patent Registration No. 10-1404808 (name: branch pipe connection construction method). Registered Patent No. 10-1642889 (Name: Connection device for branch pipe connection), Patent Registration No. 10-1783208 (Name: Branch pipe connection device), Patent Registration No. 10-2275178 (Name: Coupling assembly for pipe branch) ) and registration room No. 20-0407820 (name: branch pipe connector) disclose a coupling device for coupling a branch pipe to a original pipe. However, the coupling device disclosed herein has disadvantages in that the structure is complicated, complicated work is required for its installation, and the price of the coupling device itself is high.

In addition, registration room No. 20-0333397 (name: hose branch connector) and registration room No. 20-0354187 (name: hose with branch connection hole) disclose coupling devices having a relatively simple structure. However, the device disclosed herein has a problem in that it cannot be applied to a pipe connecting and branching structure made of metal due to material limitations in its structure.

The present invention has been created in view of the above circumstances, and has a technical purpose to provide a branch pipe coupling device that can be manufactured at a low price as well as having a simple structure.

In addition, another technical object of the present invention is to provide a coupler and a fastening device capable of installing a branch pipe coupling device to a single pipe through a very simple on-site operation.

A branch pipe coupling device according to a first aspect of the present invention for realizing the above object is a branch pipe coupling device for coupling a branch pipe by being installed in a branch hole of a circle pipe, a coupling part for detachably coupling a branch pipe. And, a coupling portion semi-permanently installed in the branch hole, and a support portion provided between the coupling portion and the coupling portion and preventing the branch pipe coupling device from being drawn into the inside of the original pipe through the branch hole. The coupling portion, the coupling portion, and the support portion are made of a metal material and integrally formed, and a hollow portion is provided while penetrating the coupling portion, the coupling portion, and the support portion as a whole, and the coupling portion is formed in a pipe shape and is circled through a branch hole. It is characterized in that it is configured to include a body entering the inside of the pipe, and a bent portion formed at an end of the body and bent outward along the inner circumferential surface of the circular pipe.

In addition, it is characterized in that a leak prevention means is provided between the support and the original pipe.

In addition, the leak prevention means is characterized in that it has a ring groove provided on the lower surface of the support portion, and an O-ring installed in the ring groove.

In addition, it is characterized in that an insertion member is additionally provided between the support and the original pipe.

In addition, the lower surface of the support is characterized in that it has the same curvature radius as the one pipe.

A coupler according to a second aspect of the present invention is a coupler employed to couple a branch pipe to a branch hole of a round pipe, wherein the coupler for detachably couples the branch pipe, the fastening part fastened to the branch hole, and the above It is provided between the coupling portion and the fastening portion, and is configured with a support portion for preventing the branch pipe coupling device from being drawn into the inside of the original pipe through the branch hole, and the coupling portion, the fastening portion, and the support portion are made of a metal material. In addition, it is integrally formed, and a hollow part is provided while penetrating the coupling part, the fastening part, and the support part as a whole, the fastening part has a pipe-shaped body, and a bent part formed at an end of the body, and the body is the support part. It is characterized in that the inner and outer diameters monotonically decrease from the side to the side of the bent portion.

In addition, the coupler is characterized in that it is bound to the branch hole through the expansion work of the body.

In addition, it is characterized in that a ring groove is additionally provided on the bottom surface of the support portion.

In addition, it is characterized in that the bending angle of the bent portion with respect to the body is set to 90 degrees or less.

In addition, the lower surface of the support is characterized in that it has the same curvature radius as the one pipe.

A fastening device according to a third aspect of the present invention includes a coupling portion for detachably coupling a branch pipe, a coupling portion fastened to a branch hole, and a support provided between the coupling portion and the coupling portion, wherein the coupling portion It has a pipe-shaped first body and a bent part formed at an end of the first body, and the first body has a coupler configured so that the inner and outer diameters monotonically decrease while going from the support part side to the bent part. One pipe A fastening device for fastening to a branch hole of, comprising: a fastening rod having a head and a fastening shaft, a nut fastened to the fastening rod, and a truncated cone-shaped second body, and when the nut is fastened to the fastening rod, the first body Having a pipe expansion member for expanding the first body while entering the inside of the first body from the end of the, and a third body seated inside the coupling portion, and a support for supporting the fastening of the fastening rod and the nut Consists of characterized by

In addition, the expansion member is characterized in that formed integrally coupled to the fastening rod.

In addition, the head portion has an inclined portion, the expansion member moves up and down along the inclined portion, and a pressing portion for pressing the bent portion toward the inner circumferential surface of the round pipe is provided at one end of the second body.

In addition, the expansion member is characterized in that it is provided with two or more expansion pieces, a ring groove is provided on the outer circumferential surface of the second body, and an elastic ring is installed in the ring groove.

In addition, the head portion is characterized in that a stopper for blocking the rise of the expansion member is additionally provided.

In addition, the support is characterized in that it is fastened detachably to the coupling portion.

In addition, a support plate is provided at the end of the support, and the support plate is characterized in that the outer diameter is set larger than the coupling part.

According to the present invention having the above configuration, the branch pipe coupling device is installed in the branch hole of the original pipe. The branch pipe coupling device includes a coupling portion for detachably coupling the branch pipe and a coupling portion for coupling the coupling device to the branch hole. The coupling part has a pipe-shaped body entering the inside of the original pipe through the branch hole, and a bent part is provided at an end of the body. The coupling device is semi-permanently bound to the original pipe by the coupling part. The above coupling device does not require a separate binding product to fasten it to the branch hole. Therefore, the structure of the coupling device is simplified, and the installation cost is minimized.

For installation of the coupling device, a coupling tool and its fastening device are employed. The fastening device can be used repeatedly. A coupler is provided for installation of the coupling device. The worker can bind the coupler to the branch hole through a simple operation of forming a branch hole in the round pipe at the work site and fastening the nut of the fastening device to the fastening rod.

The drawings accompanying this specification are intended to more effectively explain the embodiments of the present invention. Accordingly, it should be understood that some components may be exaggeratedly described or omitted to help understand the technology of the present invention.
1 is a perspective view showing the external shape of a branch pipe coupling device 1 according to an embodiment of the present invention, a perspective view showing a state in which the branch pipe coupling device 1 is coupled to the original pipe 100.
Fig. 2 is a cross-sectional view taken along the line A-A' in Fig. 1.`
Figure 3 is a partially cut-away perspective view of Figure 1;
Figure 4 is a perspective view showing a coupler 50 for installing the branch pipe coupling device (1) to the original pipe (100).
5 is a cross-sectional view taken along line B-B' in FIG. 4;
Figure 6 is a cross-sectional view for explaining the operation of installing the coupler 50 of Figure 4 to the original pipe (100).
Figure 7 is an exploded perspective view showing the configuration of a fastening device 60 according to an embodiment of the present invention for fastening the coupler 50 of the present invention to the one pipe 100.
8 is a cross-sectional view of the fastening device 60 corresponding to FIG. 7;
9 is a cross-sectional view illustrating an operation of fastening the coupler 50 to the branch hole 200 of the round pipe 100 using the fastening device 60.
10 is an exploded perspective view showing the configuration of a fastening device 90 according to another embodiment of the present invention.
11 is a cross-sectional view of the pipe expansion member 80 in FIG. 10;
12 is an exploded perspective view of the pipe expansion member 80 in FIG. 10;
13 is a cross-sectional view illustrating an operation of fastening the coupler 50 to the branch hole 200 of the original pipe 100 using the fastening device 90.
FIG. 14 is a cross-sectional view illustrating a state in which the coupler 50 is fastened using the fastening device 90 as a view for explaining a modified example of the fastening device 90 shown in FIG. 10 .
Fig. 15 is a cross-sectional view showing another configuration example of the coupling device 1 shown in Figs. 1 to 3;

Hereinafter, embodiments according to the present invention will be described with reference to the drawings. However, the embodiments described below exemplarily represent one preferred embodiment of the present invention, and examples of these embodiments do not extend the scope of the present invention. is to limit Those skilled in the art will easily understand that the present invention can be modified in various ways without departing from its technical spirit.

1 is a perspective view showing the external shape of a branch pipe coupling device 1 according to an embodiment of the present invention, which is a perspective view showing a state in which the branch pipe coupling device 1 is coupled to the original pipe 100. In addition, FIG. 2 is a cross-sectional view taken along line A-A' in FIG. 1, and FIG. 3 is a partially cut-away perspective view of FIG. In the drawing, the branch hole 200 is installed in the original pipe 100 through a conventional method, and the branch pipe coupling device 1 is installed therein. Hereinafter, for a simpler description, the branch pipe coupling device 1 is mixed with the coupling device 1, and the one pipe 100 and the pipe 100 are mixed. The coupling device 1 includes a coupling portion 10, a coupling portion 20, and a support portion 30 integrally formed. The coupling device 1 is preferably made of a metal material such as iron. The coupling device 1 is provided with a hollow portion H while penetrating the body as a whole. The branch pipe will communicate with the original pipe 100 through the hollow part H.

Coupling portion 10 is provided on one side of the coupling device (1). Coupling part 10 is generally made of a pipe shape. A screw portion for detachably coupling a branch pipe (not shown) is formed on an inner circumferential surface of the coupling portion 10 . Of course, these threaded parts may be formed on the outer circumferential surface of the coupling part 10 . Also, the shape of the connecting portion 10 is not specified. The coupling part 10 may be configured in any shape and structure capable of detachably coupling the branch pipe.

The coupling part 20 is provided on the other side of the coupling device 1. The coupling part 20 is for semi-permanently fastening the coupling device 1 to the branch hole 200 of the pipe 100. The coupling portion 20 has a shape in which an end portion of the pipe-shaped body enters the inside of the pipe 100 through the branch hole 200 and is bent outward along the inner circumferential surface of the pipe 100 . Accordingly, the coupling device 1 is prevented from being separated from the pipe 100 .

A support portion 30 is provided at an intermediate portion between the coupling portion 10 and the coupling portion 20 . The support part 30 prevents the coupling device 1 from entering the inside of the pipe 100 through the branch hole 200 and allows the coupling device 1 to be stably seated on the outer circumferential surface of the pipe 100. support The lower surface of the support part 30, that is, the contact surface in contact with the outer circumferential surface of the pipe 100 is preferably formed to have a radius of curvature equal to that of the pipe. A ring groove 31 is formed in the circumferential direction on the bottom surface of the support part 30, and an O-ring 40 is installed in the ring groove 31. The O-ring 40 is a leakage between the pipe 100 and the coupling device 1, more specifically, the fluid transported through the pipe 100 passes through the branch hole 200 of the pipe 100 and the bottom surface of the support 30. This is to prevent leakage to the outside. The number of ring grooves 31 and O-rings 40 is not specified.

In FIG. 2 , reference numeral X1 denotes the inner diameter of the coupling portion 20 , X2 denotes the inner diameter of the coupling portion 10 , and X3 denotes the inner diameter of the branch hole 200 . In the drawing, the inner diameter X1 of the coupling part 20 is shown smaller than the inner diameter X2 of the coupling part 10, but they may be set to the same size.

The branch pipe coupling device 1 having the above structure is semi-permanently bound to the original pipe 100, and no other binding product is required for coupling of the coupling device 1. Therefore, the connection structure of the branch pipe is simplified, and the cost for installing the branch pipe is minimized.

4 is a perspective view showing a coupler 50 for installing the branch pipe coupling device 1 to the pipe 100, and FIG. 5 is a cross-sectional view taken along the line B-B' in FIG. 6 is a cross-sectional view for explaining an operation of installing the coupler 50 of FIG. 4 to the pipe 100. In addition, the same reference numerals are assigned to substantially the same parts as those of FIGS. 1 to 3 described above in FIGS. 4 to 6, and detailed descriptions thereof are omitted.

In the drawing, the coupler 50 is made of a metal material such as iron, like the coupling device 1, and has a hollow part H while penetrating the body as a whole. And, the coupler 50 is composed of a coupling part 10, a fastening part 51, and a support part 30 integrally configured. Here, the coupling portion 10 and the support portion 30 are substantially the same as those of the coupling device 1 .

Meanwhile, in the coupler 50, the fastening part 51 includes a pipe-shaped body 511 and a bent part 512 formed at an end of the body 511. The length of the body 511 is set to a size corresponding to the thickness of the pipe 100. In addition, the inner and outer diameters of the body 511 monotonically decrease from the support part 30 side toward the end, that is, the bent part 512 side, so that the body 511 has a hollow truncated cone shape as a whole. The bent portion 512 is bent outward from the end of the body 511 . The outer diameter of the bent portion 512 is equal to or smaller than the inner diameter X3 of the branch hole 200 so that the fastening part 51 can be inserted through the branch hole 200 of the pipe 100 .

In the case of forming the coupling device 1 using the coupler 50, as shown in FIG. 6, the O-ring 40 is disposed in the ring groove 31 of the support 30, and the pipe passes through the branch hole 200. The fastening part 51 of the coupler 50 is drawn into the inside of the (100). And, in a state where the bottom surface of the support part 30 is in close contact with the outer circumferential surface of the pipe 100, a separate pipe expansion means is entered in the C direction or the D direction to expand the body 511 of the fastening part 51. Expansion of the body 511 is preferably performed until the outer circumferential surface of the body 511 comes into contact with the inner circumferential surface of the branch hole 200 . When the body 511 is expanded, the inner diameter at the end side of the body 511 is increased, and the bent portion 512 moves along the inner circumferential surface of the pipe 100 in conjunction therewith. Accordingly, the coupler 50 is fixedly bound to the pipe 100 while entirely covering the inner surface of the branch hole 200 and the inner and outer circumferential surfaces of the pipe 100 around the branch hole 200 . At this time, considering the binding force of the coupler 50 to the pipe 100, the bending angle α of the bent portion 512 with respect to the body 511 of the fastening portion 51 is appropriately set. Preferably, the bending angle (α) is set to 90 degrees, more preferably 90 degrees or less. When the bending angle α is set to 90 degrees or less, the coupler 50 is bound to the pipe 100 while the bent portion 512 presses the inner circumferential surface of the pipe 100 when the body 511 is expanded. The binding force of the coupler 50 to the pipe 100 is improved.

When inserting the pipe expansion means into the body 511 of the fastening part 51 in FIG. 6, a special structure is required to insert the pipe expansion means in the outward direction of the pipe 100, that is, in the D direction. 7 is an exploded perspective view showing the configuration of a fastening device 60 according to an embodiment of the present invention for fastening the coupler 50 to the branch hole 200 of the pipe 100, and FIG. 8 corresponds to FIG. It is a cross-sectional view of the fastening device 60 to be. In the drawing, the fastening device 60 includes a bolt 61, a pipe expansion member 62, a support 63, and a nut 64. They are preferably made of a metal material.

The bolt 60 is provided with a head portion 61a and a bolt shaft 61b as in the usual case. A threaded portion is formed on the outer circumferential surface of the bolt shaft 61b, and the nut 64 is detachably fastened to the bolt shaft 61b of the bolt 60. The nut 64 is provided with a fastening hole 64 in the central portion as in the case of a normal one, and a fastening screw is formed on its inner circumferential surface. Bolts 60 and nuts 64 are not required to have a special configuration. The bolt 60 and the nut 64 may adopt any configuration capable of pressurizing the pipe expansion member 62 to be described later in one direction through the fastening operation thereof.

The expansion member 62 is composed of a wedge shape, that is, a truncated cone shape in which the outer diameter monotonically decreases as the body 621 goes from the head 61a side of the bolt 60 to the support 63 side. In the expansion member 62 and the bolt 61 may be integrally configured. In the pipe expansion member 62, the outer diameter of the part having the largest diameter, that is, the part in contact with the head part 61a of the bolt 60, is equal to or less than the inner diameter X1 of the coupling part 20 in FIG. 2 is set to A through hole 622 is formed in the central portion of the tube expansion member 62 along the longitudinal direction. The inner diameter of the through hole 622 is larger than the outer diameter of the bolt shaft 61b and smaller than the outer diameter of the head portion 61a. Preferably, the through hole 622 is formed in a size as close as possible to the outer diameter of the bolt shaft 61b so that the bolt shaft 61b does not flow in a direction different from the longitudinal direction. The expansion member 62 is pressed toward the support 63 by the head 61a as the bolt 61 is fastened with the nut 64a.

The support 63 is for stably supporting the fastening operation of the coupler 50 to the pipe 100. The support 63 includes a body 631 and a support plate 632 . As can be understood from FIG. 9, the body 631 is seated in the coupling portion 10 of the coupler 50. The body 631 has an outer diameter of the coupling portion to prevent the movement of the bolt shaft 61b ( 10) is set to a size corresponding to the inner diameter (X2). In another embodiment of the present invention, the body 631 may be detachably fastened to the coupling part 10 in consideration of more reliable stability of the support 63 . The support plate 632 is integrally formed with the body 631, and its outer diameter is set larger than the inner diameter X2 of the coupling part 10. The support plate 632 stably supports the support 63 at the end of the coupling part 10 . Of course, the support plate 632 is not essential and can be removed as needed. However, preferably, the outer diameter of the support plate 632 may be set larger than that of the coupling part 10 . If the size of the support plate 632 is increased, the operator can easily attach and detach the fastening device 60 to the coupler 50 while holding the support plate 632 by hand. In addition, a through hole 633 is formed in the central portion of the support 63 along the longitudinal direction. The inner diameter of the through hole 633 is the bolt shaft 61b as much as possible within the range that can ensure the flow of the bolt shaft 61b in the longitudinal direction so that the bolt shaft 61b of the bolt 61 can be stably supported. It is set to a size close to the outer diameter of

9 is a cross-sectional view illustrating an operation of fastening the coupler 50 to the branch hole 200 of the pipe 100 using the fastening device 60 described above. In the case of fastening the coupler 50, first place the coupler 50 between the expansion member 62 of the fastening device 60 and the support 63, and then use the bolt 61 and the nut 64 to combine them At this time, the coupler 50 is disposed so that the fastening part 51 faces the expansion member 62 side. After the temporary coupling, the temporary coupling body is inserted into the branch hole 200 of the pipe 100. When inserting the temporary assembly, the O-ring 40 is disposed in the ring groove 31 of the support part 30. When the arrangement of the temporary assembly is finished, the nut 64 is fastened to the bolt 61 using, for example, an electric wrench.

In the drawing, when the nut 64 is fastened to the bolt shaft 61b, the bolt 61 moves downward as the nut 64 is fastened. When the bolt 61 descends, the pipe expansion member 62 is pushed downward by the head 61a of the bolt 61 and descends. As described above, since the outer diameter of the body 621 of the pipe expansion member 62 increases as it goes upward, the end of the fastening portion 51 rises along the inclined surface of the body 621 as the pipe expansion member 62 descends While doing so, the body 511 of the fastening part 51 is gradually expanded. When the body 511 of the fastening part 51 is expanded and its inner diameter is increased to a certain size, that is, a size corresponding to X1, the tube expansion member 62 is released downward through the inner space of the fastening part 51 and , Accordingly, the operator can separate the fastening device 60 from the coupler 50.

In the above operation, when the nut 64 is fastened to the bolt 61, the support portion 30 is pressed toward the outer circumferential side of the pipe 100 by the pressing force between the pipe expansion member 62 and the support plate 632. In addition, as the body 511 is expanded, the bent portion 512 presses the inner circumferential surface of the pipe 100 and is mounted on the inner circumferential surface. Accordingly, the coupler 50 is firmly bound to the pipe 100 through the branch hole 200 . In addition, while the support part 30 is pressed against the outer circumferential surface of the pipe 100, the O-ring 40 is sufficiently pressed and the space between the outer circumferential surface of the pipe 100 and the support part 30 is sealed by the O-ring 40. do. Therefore, leakage of the fluid through the coupling surface between the pipe 100 and the coupler 50 is prevented.

10 is an exploded perspective view showing the configuration of a fastening device 90 according to another embodiment of the present invention. In FIG. 10 , the same reference numerals are given to substantially the same parts as those of the above-described embodiment, and detailed descriptions thereof are omitted. In the drawing, the fastening device 90 includes a fastening rod 70, a pipe expansion member 80, a support 63 and a nut 64. Here, the support 63 and the nut 64 are substantially the same as those of the embodiment of FIG. 7 .

Fastening rod 70 is preferably made of a metal material. The fastening rod 70 has a head 71 and a fastening shaft 72 . The head portion 71 includes an inclined portion 711 whose outer diameter monotonically decreases from the end toward the fastening shaft 72 side. The outer diameter of the part having the largest diameter in the head part 71 is set to a value equal to or less than the inner diameter X1 of the coupling part 20 in the coupling device 1. A threaded portion 721 for fastening with the nut 64 is provided on the outer circumferential surface of the fastening shaft 72 .

11 is a cross-sectional view of the pipe expansion member 80 in FIG. 10, and FIG. 12 is an exploded perspective view of the pipe expansion member 80. The tube expansion member 80 is made of a truncated cone shape similarly to the tube expansion member 62 of FIG. 7 . That is, the expansion member 80 is made of a shape whose outer diameter monotonically decreases while going from one side to the other side. On the other hand, in the present embodiment, one side of the pipe expansion member 80 is provided with a pressing portion 81 for pressing the bent portion 512 of the coupler 50 (see FIG. 13B) toward the inner circumferential direction of the pipe 100. At this time, the outer diameter of the pressing part 81 is equal to or less than the inner diameter X1 of the binding part 20, similar to the head part 71. Inside the tube expansion member 80, a through hole 82 is formed along its longitudinal direction. At this time, the inner diameter of the through hole 82 gradually decreases while going from one side to the other side. Preferably, the inclination of the through hole 82 along the longitudinal direction is set equal to that of the inclined portion 711 in the fastening rod 70.

The tube expansion member 80 includes a plurality of tube expansion pieces 80a to 80c. In this example, the expansion pieces 80a to 80c are composed of three, but the number is not specified. Each of the pipe expansion pieces 80a to 80c includes an arc-shaped body 801 whose width monotonically decreases, and a stepped portion 802 provided on an outer circumferential surface of one side of the body 801. The stepped portion 802 constitutes the pressing portion 81 . A ring groove 83 is formed in the circumferential direction on the outer circumferential surface of the body of the expansion member 80. An elastic ring 85 is coupled to the ring groove 83 to elastically support the coupling state of the expansion pieces 80a to 80c. The elastic ring 85 is made of spring steel, for example. The material of the elastic ring 85 is not specified. As the material of the elastic ring 85, any material capable of pressing the outer circumferential surface of the tube expansion member 80 with a certain intensity or more while having elasticity may be employed. The pipe expansion member 80 expands the body 511 of the fastening part 51 in the coupler 50 while moving up and down along the inclined part 711 of the fastening rod 70, and the pressing part 81 is the fastening part. The bent portion 512 of (51) is pressed toward the inner circumference of the pipe 100.

13 is a cross-sectional view for explaining an operation of fastening the coupler 50 to the branch hole 200 of the pipe 100 using the aforementioned fastening device 90. The fastening operation using the fastening device 90 is performed in substantially the same manner as the fastening operation using the fastening device 60 described in FIG. 9 . When fastening the coupler 50, the operator temporarily couples the coupler 50 to the fastening device 90. At this time, the coupler 50 is disposed between the pipe expansion member 80 and the support 63, similarly to the fastening device 60. After the temporary coupling, the operator inserts the temporary coupling body into the branch hole 200 of the pipe 100 with the head portion 71 of the fastening rod 70 as a starting point. Of course, at this time, the O-ring 40 is disposed in the ring groove 31 of the support part 30 . When the arrangement of the temporary assembly is finished, the operator performs a fastening operation of the nut 64 to the fastening rod 70 using, for example, an electric wrench.

When the nut 64 is fastened to the fastening rod 70, the fastening rod 70 moves downward as the nut 64 is fastened. When the fastening rod 70 is lowered, the pipe expansion member 80 is lowered downward by the head 71 . When the tube expansion member 80 descends, the body 511 of the fastening part 51 is expanded by the tube expansion member 80, and a stress corresponding to the expansion force is applied to the elastic ring 85 to form an elastic ring ( 85) is extended. Accordingly, as the head portion 71 slides down along the inner circumferential surface of the tube expansion member 80 along with the descent of the tube expansion member 80, the outer diameter of the tube expansion member 80 is gradually increased. The descending of the pipe expansion member 80 and the increase in its outer diameter are continued until the body 511 of the fastening part 51 comes into internal contact with the branch hole 200 . In addition, when the pipe expansion member 80 descends, the pressure portion 81 of the pipe expansion member 80 presses the upper surface of the bent portion 512 so that the bent portion 512 is firmly fixed to the inner circumferential surface of the pipe 100. do.

When the fastening operation of the coupler 50 to the pipe 100 is finished, the operator releases the nut 64 from the fastening rod 70. When the nut 64 is released, the fastening rod 70 is raised upward by the pressure of the expansion member 80 by the elastic ring 85. And when the fastening rod 70 is sufficiently separated from the tube expansion member 80, the outer diameter of the tube expansion member 80 returns to its original size. Therefore, in this state, the operator can withdraw the fastening device 90 to the outside through the hollow part H of the coupler 50.

In the fastening device 90 described above, when the coupler 50 is fastened to the branch hole 200, the pressing part 81 presses the upper surface of the bent part 512 so that the fastening part 51 is connected to the branch hole of the pipe 100. (200) so that it can be more firmly bound.

14 is a view for explaining a modified example of the fastening device 90 shown in FIG. 10, which is a cross-sectional view showing a state in which the coupler 50 is fastened using the fastening device 90. In this example, a stopper 70a is provided on the outer circumferential surface of the head 711 of the fastening rod 70 to block the rise of the tube expansion member 81. At this time, the outer diameter of the stopper 70a is set equal to or smaller in size than the inner diameter of the coupling part 20 . This configuration example is to increase the pressing force on the bent portion 512 by limiting the rise of the tube expansion member 81 through the stopper (70a). Since other parts are the same as those of the embodiment of FIG. 10 , the same reference numerals are assigned to the same parts as those of the above-described embodiment, and detailed descriptions thereof are omitted.

In the above, embodiments according to the present invention have been described. However, the present invention is not limited to the above-described embodiments and can be variously modified and implemented without departing from the technical spirit of the present invention.

For example, in the above-described embodiment, the ring groove 31 and the O-ring 40 are used as leakage preventing means for preventing leakage of fluid between the coupling device 1 and the pipe 100. However, this leakage preventing means is not limited to a specific structure, and any structure capable of preventing leakage can be preferably employed.

15 is a cross-sectional view showing another configuration example of the coupling device 1 shown in FIGS. 1 to 3 . In the drawing, an insertion member 140 is installed below the support part 30 . Insertion member 140 is preferably composed of a plate shape of a metal material. The shape of the insertion member 140 is not specified. Insertion member 140 is provided with a through hole while the central portion is perforated. The insertion member 140 is preferably configured in a washer shape, and a coupling part 20 is disposed inside the through hole. And between the coupling part 20 and the insertion member 140 to the inside of the through hole, for example, an O-ring 40 is disposed as an airtight member.

In the coupling device 1 described above, since the O-ring 40 is disposed inside the through hole of the insertion member 140, the separation of the O-ring 40 from the coupling device 1 is prevented. In addition, since the O-ring 40 is coupled while being pressed with sufficient pressure by the support 30 in the process of forming the coupling device 1 using the coupler 50, leakage between the coupling device 1 and the pipe 100 is prevented. is prevented In addition, since the coupling device 1 is installed while the insertion member 140 is pressed by the support 30, the coupling device 1 is fixed while being in close contact with the outer circumferential surface of the pipe 100. Therefore, it is possible to eliminate the disadvantage of processing the lower surface of the support part 30 to the radius of curvature of the pipe 100 for close contact between the support part 30 and the pipe 100 .

1: coupling device, 10: coupling unit,
20: binding part, 30: support part,
31: ring groove, 40: O-ring,
50: coupler, 51: fastening part,
61: bolt, 61a: head,
61b: bolt shaft, 62: pipe expansion member,
63: support, 64: nut,
64a: fastening hole, 70: fastening rod,
71: head, 72: fastening shaft,
80: pipe expansion member, 80a ~ 80c: expansion piece,
81: pressing part, 82: through hole,
83: ring groove, 85: elastic ring,
100: one pipe, 140: insertion member,
200: branch hole. 511: body,
512: bent portion, 621: body,
622: through hole, 631: body,
632: support plate, 633: through hole,
711: inclined portion, 721: threaded portion,
801: body, 802: stepped portion,
H: hollow part, X1: inner diameter of fastening part,
X2: Inner diameter of joint, X3: Inner diameter of branch hole.

Claims (17)

delete delete delete delete delete To provide a coupler 50 employed to couple the branch pipe to the branch hole of the one pipe 100,
A coupling part 10 for detachably coupling the branch pipe, a fastening part 51 fastened to the branch hole, provided between the coupling part and the fastening part, and a branch pipe coupling device connected to the inside of the original pipe through the branch hole. It is composed of a support part 30 for preventing it from entering, and the coupling part, the fastening part, and the support part are formed integrally with the metal material, while penetrating the coupling part, the fastening part, and the support part as a whole. A hollow part is provided, and the fastening part 51 includes a pipe-shaped body 511 and a bent part 512 formed at an end of the body, and the body is bent from the support part 30 side ( 512) its inner and outer diameters decrease monotonically as it goes to the side,
The coupler 50 is bound to the branch hole through the pipe expansion work of the body,
The inner and outer diameters of the body 511 monotonically decrease from the support part 30 side to the end, that is, the bent part 512 side, so that the body 511 has a hollow truncated cone shape as a whole, and the bent part 512 is the body ( 511) is bent outward at the end, and the outer diameter of the bent part 512 is the inner diameter (X3) of the branch hole 200 so that the fastening part 51 can be drawn in through the branch hole 200 of the pipe 100. is set equal to or less than
In a state where the bottom surface of the support part 30 is in close contact with the outer circumferential surface of the pipe 100, the pipe expansion means enters in the C direction or the D direction to expand the body 511 of the fastening part 51, and is coupled to the pipe 100. Considering the binding force of the sphere 50, the coupling device characterized in that the bending angle (α) of the bent portion 512 with respect to the body 511 of the fastening portion 51 is set to 90 degrees or less. delete According to claim 6,
A coupler, characterized in that a ring groove 31 is additionally provided on the bottom surface of the support part 30. According to claim 6,
A coupler, characterized in that the bending angle of the bent portion 512 with respect to the body 511 is set to 90 degrees or less. According to claim 6,
The lower surface of the support part 30 has the same curvature radius as the one-pipe coupler. A coupling portion for detachably coupling the branch pipe, a coupling portion fastened to the branch hole, and a support portion provided between the coupling portion and the coupling portion, wherein the coupling portion connects a pipe-shaped first body and the first body. A fastening device for fastening a coupler to a branch hole of a circular pipe having a bent portion formed at an end of the first body and configured such that the inner and outer diameters of the first body monotonically decrease while going from the support portion side to the bent portion side,
A fastening rod having a head and a fastening shaft;
A nut fastened to the fastening rod,
A pipe expansion member having a truncated cone-shaped second body and expanding the first body while entering the inside of the first body from an end of the first body when the nut is fastened to the fastening rod;
A coupler fastening device comprising a third body seated inside the coupling part and a support for supporting fastening of the fastening rod and the nut. According to claim 11,
The expansion member is a coupler fastening device, characterized in that formed integrally coupled to the fastening rod. According to claim 11,
The head portion has an inclined portion,
The expansion member is raised and lowered along the inclined portion,
A coupler fastening device, characterized in that a pressing portion for pressing the bent portion toward the inner circumferential side of the circular pipe is provided at one end of the second body. In paragraph 13,
The expansion member is provided with two or more expansion pieces,
A ring groove is provided on the outer circumferential surface of the second body,
Coupler fastening device, characterized in that the elastic ring is installed in the ring groove. According to claim 13,
Coupler fastening device, characterized in that the head portion is additionally provided with a stopper for blocking the rise of the expansion member. According to claim 11,
The coupler fastening device, characterized in that the support is detachably fastened with the coupling part. According to claim 13,
A support plate is provided at an end of the support,
The support plate is a coupler fastening device, characterized in that the outer diameter is set larger than the coupling portion.

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