KR102574825B1 - Pipe connection device having flare member and method of manufacturing the same - Google Patents

Abstract

Disclosed are a pipe coupling element having a flared portion manufactured without welding and a method for manufacturing the same. The pipe coupling element includes a body, a first flare part formed on one end of the body, and a second flare part formed on the other end part of the body. Here, a fluid transfer hole through which the fluid flows is formed on the inner surface of the body, the flare parts are formed by flaring the mother body without welding, and a first flange member is arranged on the body under the first flare part And, a second flange member is arranged on the body under the second flare portion, the first flare portion is formed and the second flare portion is formed in a state in which the flange members are arranged on the mother body.

Description

Piping coupling element having a flare part and method for manufacturing the same

The present invention relates to a pipe coupling device having a flare portion and a method for manufacturing the same.

1 is a view showing a general fitting.

Referring to FIG. 1 , a conventional fitting is manufactured through six-part welding. As a result, a separate non-destructive inspection of the welded part has to be performed, and thus separate labor and inspection costs for the welding are incurred, increasing overall manufacturing cost.

KR 10-2047934 B

The present invention is to provide a pipe coupling element having a flared portion manufactured without welding and a method for manufacturing the same.

In order to achieve the above object, a pipe coupling device according to an embodiment of the present invention includes a body; a first flare part formed at one end of the body; and a second flare portion formed on the other end portion of the body. Here, a fluid transfer hole through which the fluid flows is formed on the inner surface of the body, the flare parts are formed by flaring the mother body without welding, and a first flange member is arranged on the body under the first flare part And, a second flange member is arranged on the body under the second flare portion, the first flare portion is formed and the second flare portion is formed in a state in which the flange members are arranged on the mother body.

A pipe coupling element according to another embodiment of the present invention includes a body; a first flare part formed at one end of the body; and a second flare portion formed on the other end portion of the body. Here, a fluid transfer hole through which fluid flows is formed on an inner surface of the body, the flare parts are formed by flaring a mother body without welding, and a portion where the flare parts and the body are connected is rounded.

A pipe coupling element according to another embodiment of the present invention includes a body; a first flare part formed at one end of the body; and a second flare portion formed on the other end portion of the body. Here, a fluid transfer hole through which fluid flows is formed on the inner surface of the body, and the flare parts are formed by flaring a mother body longer than the body without welding, and the mother body is fixed by jigs having grooves flared in, the groove of one of the jigs has the same shape as a part of the body, and the groove of the other jig has the same shape as the other part of the body.

In a method for manufacturing a pipe coupling element according to an embodiment of the present invention, in a state in which a mother body is fixed to grooves of jigs having grooves, one of the externally exposed end portions of the jigs is flared to form a first flare forming wealth; arranging flange members on the mother body between the jigs and the first flare portion or between the jigs and an end portion of the mother body where the first flare portion is not formed; and forming a second flared portion by flaring the other end of the mother body in a state in which the flange members are arranged on the mother body. Here, the flange members are freely movable on the mother body, and the radius of the hole formed at the center of the flange members is smaller than the radius of the flare parts.

A method for manufacturing a pipe coupling element according to another embodiment of the present invention includes arranging flange members on the mother body while fixing the mother body to grooves of jigs; Forming a first flare part by flaring one of the externally exposed end portions of the jigs in the mother body in a state where the flange members are arranged; and forming a second flared portion by flaring the other end portion of the mother body in a state in which the first flared portion is formed. Here, the flange members are freely movable on the mother body, and the radius of the hole formed at the center of the flange members is smaller than the radius of the flare parts.

In a method for manufacturing a pipe coupling element according to another embodiment of the present invention, in a state in which the mother body is fixed to the grooves of the jigs, one of the externally exposed end portions of the jigs is pressed with a press to form a first flare forming wealth; arranging flange members on the mother body between the jigs and the first flare portion or between the jigs and an end portion of the mother body where the first flare portion is not formed; and forming a second flared portion by applying pressure to the other end portion of the mother body with the press while the flange members are arranged on the mother body.

Since the pipe coupling element according to the present invention is manufactured through a flaring process without welding, manufacturing costs can be reduced because no additional cost is incurred due to welding.

1 is a view showing a general fitting.
2 is a diagram schematically illustrating a process of forming a pipe coupling element according to an embodiment of the present invention.
3 is a diagram illustrating a rounding structure according to an embodiment of the present invention.
4 is a view showing a process of manufacturing a pipe coupling element according to a first embodiment of the present invention.
5 is a view showing a process of manufacturing a pipe coupling element according to a second embodiment of the present invention.
6 is a view showing a process of manufacturing a pipe coupling element according to a third embodiment of the present invention.

Singular expressions used herein include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "consisting of" or "comprising" should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or some of the steps It should be construed that it may not be included, or may further include additional components or steps. In addition, terms such as "...unit" and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software or a combination of hardware and software. .

The present invention relates to a pipe coupling element, and a flare portion may be formed through a flaring process without welding. Here, the pipe coupling element refers to all members using the flare part and capable of transferring fluid, and may be, for example, a pipe or a fitting having a flare part.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, for convenience of explanation, it will be assumed that the pipe coupling element is a fitting.

2 is a view schematically illustrating a process of forming a pipe coupling element according to an embodiment of the present invention, and FIG. 3 is a view showing a rounding structure according to an embodiment of the present invention.

Referring to (E) of FIG. 2, the pipe coupling element of this embodiment includes a body 210, a first flare part 212, a second flare part 214, a first flange member 202a and a second flange member (202b). At this time, a fluid transfer hole 220 through which fluid flows may be formed inside the body 210 .

The body 210 has, for example, a curved shape and may be formed of metal or plastic.

According to one embodiment, a liner made of fluorine resin is formed on the inner surface of the body 210, and the liner can be in contact with the fluid. For example, the liner may be tetra fluoro ethylene perfluoro alkyl vinyl ether copolymer (PFA), polytetrafluoroethylene (PTFE), polychlorotripolyethylene (PCTFE), vinyl isofluoride (Polyvinylidene fluoride, PVDF) and the like. In addition, the liner 602 may be formed of plastic such as polyethylene (Poly Ethylene, PE) or polypropylene (PP).

The first flare part 212 is formed at one end of the body 210 and may be formed perpendicularly to the body 210 through a flaring process as will be described later. A first flange member 202a may be arranged on the body 210 directly below the first flare part 212 .

Specifically, a hole is formed in the center of the first flange member 202a, and the body 210 may be inserted into the hole. That is, the first flange member 202a spans the outer circumferential surface of the body 210 and may be used for coupling with other pipe coupling elements. For example, as bolts pass through the flange portions of the first flange portion 202a and the other pipe coupling elements, the pipe coupling elements and the other pipe coupling elements may be coupled.

The second flare part 214 is formed at the other end of the body 210 and may be formed perpendicularly to the body 210 through a flaring process as will be described later. A second flange member 202b may be arranged on the body 210 directly below the second flare part 214 .

Specifically, a hole is formed in the center of the second flange member 202b, and the body 210 can be inserted into the hole. That is, the second flange member 202b spans the outer circumferential surface of the body 210 and may be used for coupling with other pipe coupling elements. For example, as the bolt passes through the second flange portion 202b and the flange portion of the other pipe coupling element, the pipe coupling element and the other pipe coupling element may be coupled.

On the other hand, the radius of the hole of the flange member (202a or 202b) is smaller than the radius of the corresponding flare portion (212 or 214). Therefore, after the flared portions 212 and 214 are all formed, the flange members 202a and 202b cannot be arranged on the body 210 . Accordingly, in a state in which one of the flare parts 212 and 214 is formed and the flange members 202a and 202b are arranged on the body 210, the other flare part may be formed through a flaring process.

Looking at the process of manufacturing these flare parts 212 and 214, one end of the matrix 200 as shown in (A) to (C) of FIG. 2 is flared through a flaring process, for example, 1 The end of the mother body 200 may be flared until the flared portion 212 is formed perpendicular to the body 210 .

According to one embodiment, the mother body 200 has a longer length than the body 210, for example, at least twice the length of the width of the first flare portion 212, preferably twice as long as the body 200. ) can be longer than From another point of view, the length of one end of the mother body 200 may be greater than the length of the end of the body 210 by the width (a) of the first flare part 212 . That is, the flare parts 212 and 214 having a width a may be formed at the end parts of the body 210 by flared end parts of the mother body 200 that are as long as the length of the flare parts 212 and 214. .

The shape of the remaining parts of the mother body 200 except for the portions corresponding to the flare parts 212 and 214 may be the same as the shape of the body 210 .

Subsequently, as shown in (D) of FIG. 2, the other end of the mother body 200 is flared through a flaring process, for example, the second flare portion 214 is formed perpendicular to the body 210 It can be flared up to Here, the length of the other terminal part of the mother body 200 may be greater than the length of the other terminal part of the body 210 by the width (a) of the second flare part 214 .

Subsequently, as shown in (E) of FIG. 2 , flange members 202a and 202b may be formed to span the outer circumferential surface of the body 210 . Specifically, a hole is formed in the center of the flange member 202a or 202b, and the body 210 may be inserted into the hole. As a result, the plan member members 202a and 202b may surround a portion of the outer circumferential surface of the body 210 .

However, since the radius of the hole of the flange member 202a or 202b is smaller than the radius of the flare portion 212 or 214, the flange members 202a and 202b form the second flare portion after the first flare portion 212 is formed ( 214) spans the outer circumferential surface of the base body 200 before being formed, and then the second flared portion 214 may be formed perpendicularly to the other longitudinal end of the body 210 through a flaring process.

According to another embodiment, after the flange members 202a and 202b span the outer circumferential surface of the mother body 200, the first flare portion 212 and the second flare portion 214 may be sequentially formed through a flaring process there is.

However, considering the efficiency of the manufacturing process, the flange members 202a and 202b span the outer circumferential surface of the mother body 200 after the second flare portion 212 is formed and before the second flare portion 214 is formed. efficient

Meanwhile, the width of the hole formed in the center of the flare portion 212 or 214 corresponding to the fluid transfer hole 220 may be smaller than the width of the hole formed in the center of the flange member 220a or 220b.

According to one embodiment, the starting point of the inner diameter in the pipe coupling element, for example, a point where the body 210 and the flare part 212 or 214 meet may be rounded as shown in FIG. 3 .

The radius (R) of the point where the body 210 and the flare part 212 or 214 meet is shown in Table 1 below.

Size of inlet (outlet) (DN) R value (mm) R/DN DN20 4 to 6 0.2 to 0.3 DN25 4 to 6 0.16 to 0.24 DN40 5 to 8 0.125 to 0.2 DN50 5 to 8 0.1 to 0.16 DN65 7 to 10 0.108 to 0.154 DN80 7 to 10 0.088 to 0.125 DN100 8 to 11 0.08 to 0.11 DN125 8 to 11 0.064 to 0.088 DN150 10 to 15 0.067 to 0.1 DN200 10 to 15 0.05 to 0.075 DN250 10 to 18 0.04 to 0.072 DN300 10 to 18 0.033 to 0.06

Here, DN means the diameter of the inlet or outlet corresponding to the fluid transfer hole 220. For example, DN20 indicates that the diameter of the inlet or outlet is 20 mm, and DN300 indicates that the diameter of the inlet or outlet is 300 mm. Other sizes are defined in the same way.

Referring to Table 1, R/DN may have a range of 18/300 (0.033) to 6/20 (0.3). In addition, while the R value is relatively large with respect to DN in the small size pipe coupling element, the R value is relatively small with respect to DN in the large size pipe coupling element.

On the other hand, if the R value is too large, the coupling strength of the pipe coupling element and other pipe coupling elements may be weakened.

In particular, since the pressure of the fluid flowing through the fluid transfer hole 220 is very high in the case of a large-sized pipe coupling element, it is difficult to set a large R value in consideration of the strength of coupling with other pipe coupling elements. As a result, the maximum value of R/DN of the large-sized pipe coupling element is substantially smaller than the maximum value of R/DN of the small-size pipe coupling element.

On the other hand, since the small-sized pipe coupling element must have a minimum R value or more, the minimum R/DN value of the small-size pipe coupling element is substantially larger than the minimum R/DN value of the large-size pipe coupling element.

From another point of view, assuming that the large size pipe coupling element is DN100 or more and the small size pipe coupling element is DN80 or less, the R / DN of the large size pipe coupling element must be 0.11 or less, and the small size pipe coupling element R/DN of must be at least 7/80.

In summary, the flare parts 212 and 214 of the pipe coupling element of this embodiment may be formed perpendicularly to the end parts of the body 210 through a flaring process, for example. Therefore, there is no need to perform a separate welding process, and as a result, cost and time due to welding inspection and the like can be saved.

4 is a view showing a process of manufacturing a pipe coupling element according to a first embodiment of the present invention.

Referring to (A) of FIG. 4 , jigs 400 and 402 having grooves having the same shape as half of the mother body 200 are prepared. Specifically, the first jig 400 has a groove 430 capable of accommodating half of the mother body 200 in the longitudinal direction, and the second jig 402 has the other half of the mother body 200 in the longitudinal direction. It can have a home that can accommodate it. Here, the groove 430 of the first jig 400 and the groove of the second jig 402 may have a symmetrical structure.

However, the grooves are arranged symmetrically, but the size or shape of the grooves of the jigs 400 and 402 may be different depending on the structure of the mother body 200. For example, more than half of the mother body 200 is accommodated in the groove 430 of the first jig 400, and less than half of the mother body 200 can be accommodated in the groove of the second jig 402. .

In addition, the grooves may be arranged asymmetrically depending on circumstances.

According to one embodiment, the length of the groove 400 may be smaller than the length of the mother body 200. Preferably, the length of the matrix 200 may be greater than the length of the groove 400 by a length greater than the sum of the widths of the flared portions 212 and 214 . As a result, when the mother body 200 is inserted into the grooves of the jigs 400 and 402 and fixed, as shown in FIG. can be exposed to the outside.

After fixing the mother body 200 using the jigs 400 and 402, the work of the mother body 200 as shown in FIG. The ends can be flared. Specifically, after contacting the end of the pointed fixture 410 with the outer circumferential surface of the end of the matrix 200 exposed to the outside, the fixture 410 may be rotated. In this case, one end portion of the mother body 200 is bent in a direction crossing the other part (body 210) of the mother body 200 by the rotating fixture 410, and finally, the one end portion of the body ( Fixture 410 may be rotated until it is formed perpendicular to 210 . At this time, the jigs 400 and 402 may also be fixed by a fixing device (not shown) so as not to move arbitrarily.

Then, as shown in (C) of FIG. 4 , the flange members 202a and 202b may be straddled over the mother body 200 .

According to one embodiment, the jigs 400 and 402, the first flange member (202a) can be straddled over one of the ends of the mother body 200 exposed to the outside, and the second flange member (202b) on the other end. ) can be spanned. At this time, a corresponding flare part is formed at the longitudinal end of one of the flange members 202a and 202b.

According to another embodiment, both of the two flange members 202a and 202b may be strung over one of the end portions of the mother body 200 exposed to the outside of the jigs 400 and 402 . For example, the flange members 202a and 202b may be straddled over the end portion of the mother body 200 where the flared portion is formed.

Subsequently, the second flared portion 214 may be formed at the other end portion of the mother body 200 by rotating the fixture 410 in contact with the outer circumferential surface of the other end portion of the mother body 200 where the flare portion is not formed.

Subsequently, the jigs 400 and 402 may be separated to form a pipe coupling element as shown in (D) of FIG. 4 . At this time, the flange members 202a and 202b can move freely on the body 210 .

Meanwhile, a liner 420 may be formed on an inner surface of the body 210 . For example, after the mother body 200 is flared, the liner 420 may be formed on the inner surface of the body 210 .

In addition, in a state in which the flange members 202a and 202b are arranged on the mother body 200 after fixing the mother body 200 using jigs 400 and 402, the flange members 202a and 202b are fixtures It can also be flared sequentially by using 410 .

5 is a view showing a process of manufacturing a pipe coupling element according to a second embodiment of the present invention.

Referring to (A) of FIG. 5 , jigs 400 and 402 having grooves having the same shape as half of the mother body 200 are prepared. Specifically, the first jig 400 has a groove 430 capable of accommodating a part of the mother body 200 in the longitudinal direction, and the second jig 402 has another part of the mother body 200 in the longitudinal direction. It can have a home that can accommodate it.

After fixing the mother body 200 using the jigs 400 and 402, one end of the mother body 200 is fixed using the fixture 500 of the flaring machine as shown in FIG. can be flared. Specifically, it is possible to rotate the jigs 400 and 402 after contacting the end of the pointed fixture 500 with the outer circumferential surface of the end of the matrix 200 exposed to the outside. As a result, one end portion of the mother body 200 may be formed perpendicular to the other part (body 210) of the mother body 200. At this time, a mechanical device for rotating the jigs 400 and 402 is required.

Then, as shown in (C) of FIG. 5 , the flange members 202a and 202b may be straddled over the mother body 200 .

According to one embodiment, the jigs 400 and 402, the first flange member (202a) can be straddled over one of the ends of the mother body 200 exposed to the outside, and the second flange member (202b) on the other end. ) can be spanned. At this time, a corresponding flare part is formed at the longitudinal end of one of the flange members 202a and 202b.

According to another embodiment, both of the two flange members 202a and 202b may be strung over one of the end portions of the mother body 200 exposed to the outside of the jigs 400 and 402 . For example, the flange members 202a and 202b may be straddled over the end portion of the mother body 200 where the flared portion is formed.

Subsequently, the second flared part ( 214) can be formed.

Subsequently, the jigs 400 and 402 may be separated to form a pipe coupling element as shown in (D) of FIG. 5 .

On the other hand, after fixing the mother body 200 using jigs 400 and 402, in a state where the flange members 202a and 202b are arranged on the mother body 200, the flange members 202a and 202b are fixtures. It can also be flared by using 500.

6 is a view showing a process of manufacturing a pipe coupling element according to a third embodiment of the present invention.

As shown in (A) and (B) of FIG. 6, in a state in which the mother body 200 is fixed with the jigs 400 and 402, the first press 600 presses one end of the mother body 200. It is possible to bend the end portion by adding. At this time, the first press 600 has a top shape, and as a result, the longitudinal end is bent to match the shape of the lower surface of the first press 600 .

Then, the second press 602 may apply pressure to the terminating part to form a first flare part 212 formed perpendicular to the terminating part of the body 210 . Here, the second press 602 has a 'T' shape, and as a result, the first flare part 212 may be formed perpendicular to the body 210 .

Subsequently, as shown in (C) of FIG. 6, the flange members 202a and 202b are arranged on the terminal ends of the base body 200 exposed to the outside of the jigs 400 and 402, and then The second flared portion 214 may be formed by flared at the other longitudinal end of the mother body 200 using the first press 600 and the second press 602 .

Subsequently, the jigs 400 and 402 may be separated to form a pipe coupling element as shown in (D) of FIG. 6 .

Above, the first press 600 and the second press 602 are mentioned as having different shapes, but may have the same shape.

On the other hand, the components of the above-described embodiment can be easily grasped from a process point of view. That is, each component can be identified as each process. In addition, the process of the above-described embodiment can be easily grasped from the viewpoint of components of the device.

The embodiments of the present invention described above have been disclosed for illustrative purposes, and those skilled in the art having ordinary knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions will be considered to fall within the scope of the following claims.

200: mother body 202a, 202b: flange member
210: body 212: first flare part
214: second flare part 220: fluid transfer hole

Claims (11)

delete delete delete delete delete delete delete Forming a first flare part by flaring one of the externally exposed end portions of the jigs in a state in which the mother body is fixed to the grooves of the jigs having grooves;
arranging a flange member on the cap body between the jigs and an end portion of the cap body where the first flare part is not formed; and
In a state where the flange member is arranged on the mother body, flare the other end portion of the mother body to form a second flare portion to create a pipe coupling element having flare portions formed at both ends of the body,
The flange member is freely movable on the base body, and the radius of the hole formed in the center of the flange member is smaller than the radius of the flare parts,
one of the grooves has the same shape as a part of the mother body and the other inner groove has the same shape as the other part of the mother body;
The ratio of the radius (R) of the point where the body and the first flare part meet and the diameter (DN) of the inlet or outlet corresponding to the fluid transfer hole has a range of 18/300 to 0.3,
The pipe coupling element of DN80 or less has R / DN of 7/80 or more, and the pipe coupling element of DN100 or more has R / DN of 0.11 or less. The method of claim 8, wherein the pipe coupling element is a fitting,
The method for manufacturing a pipe coupling element, characterized in that each flare portion is formed by rotating the fixture after contacting the outer circumferential surface of the mother body.






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