KR20110134186A

KR20110134186A - A manufacturing method of the tube connector assembley

Info

Publication number: KR20110134186A
Application number: KR1020100054034A
Authority: KR
Inventors: 조경호
Original assignee: 주식회사 서원기술
Priority date: 2010-06-08
Filing date: 2010-06-08
Publication date: 2011-12-14
Also published as: KR101180476B1

Abstract

Disclosed is a method of making a pipe fitting assembly.
The method of manufacturing a pipe fitting assembly includes a process of preparing a pipe for manufacturing a fitting for connecting a pipe and a valve, and one of two joints corresponding to the pipe or a valve at one end of the pipe for manufacturing the fitting. A step of expanding the part, a step of installing an adapter on the pipe side for manufacturing the joint, and a step of expanding the other joint of the two joints corresponding to the pipe or the valve at the other end of the pipe for manufacturing the joint; Include.

Description

A manufacturing method of the tube connector assembley

The present invention relates to a method for producing a pipe fitting assembly which can be easily manufactured in a non-welding manner, a fitting assembly used for connecting between a valve and a pipe.

In general, valves for controlling the flow of fluid are installed in the connection section of the pipe line connected to the pipes.

According to the connection structure of the pipe line as described above, it is particularly important to connect between the pipe and the valve in a stable joint state in which watertight is maintained.

Various types of pipe fittings are used for this type of joint work, but stainless steel rings (also called "SR rings") are used to increase the joint strength and work compatibility (joint length control). Hub type pipe fittings known to be excellent are widely used.

Briefly describing the structure of the hub-type pipe fittings, and having a stainless ring on the inside and one end portion is extended to one end portion to be connected to the tubular body, and disposed on one side of the first joint portion and fastened with the nipple One end portion is formed to include a second joint portion is extended so that it can be connected to the valve side.

On the outer surface of the second joint portion, a nut-type adapter formed to connect the end portion of the second joint portion to the nipple by screwing is provided.

That is, one end (first joint) of the pipe joint can be connected to the tubular body by a tightening force by pressing, and the other end (second joint) can be connected to the valve side by fastening a nut-type adapter with the nipple. So that it is formed.

In particular, according to the structure of the pipe fittings, both ends of the fittings are provided in an expanded state, respectively, and the hole portion of the adapter is formed smaller than the expansion portions of the fitting hole, so many restrictions on assembly when installing the adapter on the fitting hole This follows.

Therefore, the method of manufacturing the above pipe joints, the two joints (first and second joints) are produced by dividing each of the two, and then joining the two joints by welding with the adapter fitted to one joint. In a way.

However, the method of manufacturing a pipe fitting including a welding process as described above may cause various problems.

In particular, when the first joint and the second joint are welded, the corrosion resistance of the weld joint may be drastically degraded and premature corrosion may occur, so that satisfactory durability and product reliability cannot be expected.

Moreover, the pipe joints mainly use stainless steel. Such stainless steels are known to easily cause local corrosion phenomenon called grain boundary corrosion due to welding temperature.

In addition, the welding operation may be a factor that greatly lowers workability in manufacturing the fitting because the process is complicated and requires excessive time.

In addition, it is difficult to obtain satisfactory joining accuracy in the welding operation, which may cause excessive defect quality.

These problems are due to the problem of the assembly of the adapter to manufacture the two joints, respectively, and then to join them by welding to manufacture the pipe joints.

Therefore, the present invention has been proposed to solve the above problems,

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a pipe fitting assembly that can be easily manufactured by a non-welding method for a pipe fitting assembly used for connecting between a pipe and a valve.

In order to achieve the object as described above,

Preparing a pipe for manufacturing a fitting for connecting between the pipe and the valve;

Expanding one of the two joints corresponding to the tube or the valve at one end of the pipe for manufacturing the joint;

Installing an adapter on the pipe side for manufacturing the joint;

Expanding the other one of the two joints corresponding to the pipe or the valve at the other end of the pipe for manufacturing the joint;

It provides a method of manufacturing a pipe fitting assembly comprising a.

As described above, the present invention provides an adapter in a state in which one of the two joints corresponding to the tubular body or the valve is extended to one end of the pipe for manufacturing the joint, and then the other joint is connected to the other end of the pipe for the joint manufacturing. The pipe fitting assembly can be easily manufactured in such a way that it can be expanded to form a.

In particular, such a manufacturing method proceeds in a non-welding manner, which does not include any welding joint operation, and thus, for example, in order to assemble an adapter, a pipe is divided into two and each of them is manufactured. The problems with the method of manufacturing pipe joints can be improved.

1 is a view schematically showing the entire working process of the pipe fitting assembly manufacturing method according to an embodiment of the present invention.
FIG. 2 is a view schematically showing a state of use of a pipe fitting assembly manufactured through the processes of FIG. 1.
FIG. 3 is a view for explaining a process of preparing a pipe for manufacturing a fitting among the processes of FIG. 1.
4 and 5 are diagrams for describing a process of expanding the first joint part among the processes of FIG. 1.
FIG. 6 is a view for explaining a process of installing an adapter among the processes of FIG. 1.
FIG. 7 is a view for explaining a process of expanding a second joint part among the processes of FIG. 1.
8 and 9 are diagrams for describing a process of forming a protective layer among the processes of FIG. 1.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

The embodiments of the present invention will be described by those skilled in the art to which the present invention is applicable.

Therefore, since the embodiments of the present invention can be modified in various other forms, the claims of the present invention are not limited to the embodiments described below.

1 is a view showing the overall operation of the pipe fitting assembly manufacturing method according to an embodiment of the present invention, Figure 2 is a view showing a state of use of the pipe fitting assembly manufactured through the process of Figure 1 to be.

Among the processes of FIG. 1, reference numeral S1 refers to a process of preparing a pipe for manufacturing a fitting.

3 is a view for explaining the operation of preparing the pipe 2 for manufacturing a fitting.

The pipe 2 for manufacturing the fitting can be used, for example, a stainless steel pipe known to be excellent in corrosion resistance and durability among the metal pipe, and as shown in Figure 2 suitable length for connecting the valve (V) and the tube (T) Form to have.

That is, as shown in FIG. 3, it is possible to proceed in a manner of cutting the end of the pipe 2 for manufacturing a joint using a conventional pipe cutting machine M1.

Next, the process (S2) of forming any one of the two joints at one end of the pipe for manufacturing the joint in the process of Figure 1 proceeds.

In the present embodiment, an example is described in which a joint portion 4 (hereinafter, referred to as a “first joint portion”) corresponding to the tubular body T is first formed among two joint portions.

4 and 5 are views for explaining the operation of forming the first joint portion (4).

The first joint portion 4 is formed at one end of the pipe 2 for manufacturing the fitting to have a first expansion surface F1 corresponding to the tubular body T.

The first expansion surface (F1) is formed in one end of the pipe (2) for manufacturing the fitting to enable a kind of socket (socket) function that can be connected by fitting the end of the tube (T) as shown in FIG.

This operation can be done by forcibly expanding (expanding) the outer circumferential surface of one end of the pipe 2 for manufacturing the fitting.

For example, while moving the expansion tool M2 as shown in FIG. 4 to a conventional expansion press device (not shown), the first expansion surface is expanded by pressing one end of the pipe 2 for manufacturing the joint to expand the outer surface. (F1) can be formed.

Although the work of forming the first expansion surface F1 as described above is not shown in the drawings, for example, one or more expansion tools are sequentially pressed to one end of the pipe for manufacturing the fitting port, thereby meeting the required shape and size. The first extended surface F1 may be formed to be.

In addition, referring to FIG. 5, the forming of the first joint portion 4 may include setting the supporting ring member R inside the first expansion surface F1.

The support ring member (R) is for holding the outer peripheral surface of the tubular body (T) fitted inside the first joint portion (4) with a tightening force.

The support ring member R may be a stainless steel ring, for example, known to have excellent corrosion resistance and durability among metal rings.

That is, the support ring member R is inserted into the first expansion surface F1 of the first joint portion 4.

Then, although not shown in the drawing so that the support ring member (R) is fixed to the inside of the first joint portion 4 in a stable state, the first joint portion (not shown) using a conventional curling device (not shown) Press the outer surface of 4) to finish the shape as shown in FIG.

Then, the outer surface of the support ring member (R) is pressed by the inner surface of the first expansion surface (F1) can be fixed in a stable state inside the first joint (4).

Although not shown in the drawing, the support ring member R is closed by a conventional crimping tool while the end portion of the tube T is fitted inside the first expansion surface F1, and thus the outer surface of the tube T is fixed. It works to hold it in a stable contact state.

5, the sealing ring member R1 (eg, a rubber ring) is inserted into the first expansion surface F1 at a point adjacent to the support ring member R in a conventional manner. Install. The seal ring member R1 is preferably installed by hand after the entire manufacturing process is completed.

Next, the process (S3) of installing the adapter on the pipe side for manufacturing the fittings in the processes of FIG. 1 is performed.

FIG. 6 is a diagram for explaining a step of installing the adapter 6 on the pipe 2 side for manufacturing the fitting.

The adapter 6 has a male thread portion Q1 and a female thread portion Q2 formed on one side of a normal nipple N connected to the valve V, and has a hole portion H formed at a center point of one side. It consists of a nut type structure.

The material of the adapter 6 may be used among metals, and for example, stainless steel or brass may be used to match the required joint environment.

The installation work proceeds by inserting the hole portion H of the adapter 6 into one end portion of both ends of the pipe 2 for fitting production.

That is, as shown in FIG. 6, the hole portion H of the adapter 6 may be inserted into the opposite end side of the end portion on which the first joint portion 4 is formed among both ends of the pipe 2 for manufacturing the fitting.

Most of the diameter of the hole portion H of the adapter 6 is larger than the diameter of the pipe 2 for manufacturing the fitting, and smaller than the diameter of the first expansion surface F1 of the first joint 4.

Therefore, when the first joint 4 having the first expansion surface F1 is formed at one end of the pipe 2 for manufacturing the fitting, the adapter 6 is easily inserted through the opposite end. Can be installed.

In the above description, an example is described in which the first joint 4 is expanded on the pipe 2 side for manufacturing a fitting, and then the adapter 6 is installed. However, the present invention is not limited to this working method.

For example, although not shown in the drawings, the adapter 6 may be installed through one side or the other end of the pipe 2 for manufacturing the joint before the first joint 4 is formed.

Therefore, the above-described installation step S3 of the adapter 6 may be selectively performed after the step S1 of preparing the pipe 2 for manufacturing the joint or the step S2 of forming the first joint 4. Can be.

Next, in the processes of FIG. 1, a process (S4) of forming a second joint portion having a second expansion surface on the pipe side for manufacturing the joint is performed.

FIG. 7: is a figure for demonstrating the process of forming the 2nd joint part 8 which has the 2nd extended surface F2.

The second expansion surface F2 is a contact surface in a state in which watertightness can be maintained with one side end side of the nipple N installed at the valve V side when connecting between the tube T and the valve V. FIG. It is to provide.

This operation is, for example, pressing the other end of the pipe for manufacturing the seams 2 in a conventional manner to integrally form a second expansion surface F2 as shown in FIG. It is.

The second expansion surface F2 may be formed in a normal flange type at the other end of the pipe 2 for manufacturing the fitting.

Then, when the second expansion surface (F2) is connected to one end of the nipple (N) while fastening the adapter (6) as shown in Figure 2 can be kept watertight with the end outer surface of the nipple (N) It can provide a stable contact area.

Therefore, the present invention described above forms a first joint part 4 or second joint part on one side of both ends of the pipe 2 for manufacturing a joint, and then the second joint part 8 or the first joint part of the opposite side is formed. The pipe fitting assembly can be manufactured by forming the second joint 8 or the first joint with the adapter 6 installed on the pipe 2 for forming the joint before forming the joint). .

In particular, this manufacturing method is a non-welding method that does not include any welding joint operation, so for example, two pipes each having expanded joints at one end may be manufactured for smooth assembly of the adapter. In addition, it is possible to improve the problems of the conventional method of manufacturing a joint for welding the pipes with the adapter inserted in one pipe.

In the above description, the first joint part 4 corresponding to the tubular body T is first formed among the first joint part 4 and the second joint part 8, but the present invention is limited thereto. It is not.

For example, although not shown in the drawing, the second joint 8 is formed at one end of the pipe 2 for manufacturing the joint among the first joint 4 and the second joint 8, and then the adapter ( It is also possible to proceed in such a manner that 6) is provided and the first joint portion 4 is formed at the other end.

Referring back to FIG. 1, the method of manufacturing a pipe fitting assembly according to an embodiment of the present invention may further include a step (S5) of heat treating a pipe for manufacturing a fitting.

This operation is performed by the heat treatment method which can raise the durability of the pipe 2 for joint fitting manufacture.

In particular, when the first expansion surface F1 and the second expansion surface F2 are formed on the end side of the pipe 2 for manufacturing the seam by the physical method (pressing), the internal stress on the pipe 2 for the seam manufacturing pipe 2 is formed. This may be a factor that degrades durability.

Therefore, the work of heat-treating the pipe 2 for manufacturing the fittings may be carried out by an annealing method known to be able to easily remove the internal stress, among other various heat treatment methods.

Although not shown in the drawing, the annealing operation is performed by heating the pipe 2 for manufacturing the joint to a predetermined temperature to maintain the temperature and then slowly cooling.

Then, as well as removing the internal stress of the pipe 2 for manufacturing the fitting, it is possible to secure the stability of the crystal structure to prevent the durability of the pipe 2 for manufacturing the fitting.

Although the above described annealing operation among various heat treatment methods as an example, the present invention is not limited thereto. In particular, after the expansion (expansion) of the pipe (2) for manufacturing the seams, various heat treatment methods (e.g., solid solution heat treatment /) that can ensure that the rigidity of the expanded portion of the pipe is reduced to ensure uniform durability solution treatment).

Therefore, the pipe fitting assembly C as shown in FIG. 2 can be easily manufactured by a non-welding method through the above processes. Therefore, for example, it is possible to improve the problems of the conventional manufacturing method of the method of manufacturing the pipe divided into two for assembly of the adapter, and then welded and the joints manufactured by the manufacturing method.

Referring back to FIG. 1, the method of manufacturing a pipe fitting assembly according to an exemplary embodiment of the present disclosure may further include a step S6 of forming a protective layer on a pipe side for manufacturing a fitting.

This operation is particularly intended to form a protective layer (I) capable of suppressing corrosion that may occur at the contact site while the pipe (2) for manufacturing the fitting and the adapter (6) are in contact with each other.

Particularly, when the pipe 2 and the adapter 6 are made of a heterogeneous material, the heterogeneous corrosion may easily occur.

For example, when the pipe 2 for manufacturing the fittings uses a stainless steel pipe, and the adapter 6 uses a brass adapter, the pipe 2 and the pipe for manufacturing the fittings during the tightening or loosening operation of the adapter 6 are used. Contact may result in corrosion at the site of contact.

8 and 9 are diagrams for explaining a process of forming the protective layer (I) on the pipe 2 side for manufacturing the fittings.

This operation can be carried out by, for example, using a shrinkage tube formed of a synthetic resin film as the protective material I1 and shrinking the protective material I1 using an industrial dryer M3 or a heating furnace.

That is, as shown in FIG. 8, the protective material I1 is disposed to cover the outer circumferential surface of the second joint 8 corresponding to the adapter 6 among the outer surfaces of the pipe 2 for manufacturing the fitting.

Then, as shown in FIG. 9, when the protective material I1 is contracted by the hot air of the industrial dryer M3, the protective material I1 is contracted and the outer surface of the second joint part 8 of the pipe 2 for manufacturing the joint is manufactured. The protective layer I can be formed in a covering state.

Then, the protective layer (I), for example, carries the fitting assembly (C), or when the adapter 6 is rotated to fasten the outer surface of the second joint 8 and inside the adapter 6 The surface can be prevented from making direct contact.

Therefore, it is possible to prevent the corrosion (heterogeneous corrosion) phenomenon which may be caused by the contact of the pipe 2 for manufacturing the fitting and the adapter 6.

And, as described above, the operation of forming the protective layer (I) can be selectively performed between the working steps after the step (S1) of preparing the pipe for manufacturing the seam, referring to FIG. When the process includes a heat treatment operation, it is preferable to carry out after the heat treatment operation.

2: pipe for manufacturing fittings 4: first joint 6: adapter
8: 2nd joint part F1: 1st expansion surface F2: 2nd expansion surface

Claims

Preparing a pipe for manufacturing a fitting for connecting between the pipe and the valve;
Expanding one of the two joints corresponding to the tube or the valve at one end of the pipe for manufacturing the joint;
Installing an adapter on the pipe side for manufacturing the joint;
Expanding the other one of the two joints corresponding to the pipe or the valve at the other end of the pipe for manufacturing the joint;
Method of manufacturing a pipe fitting assembly comprising a.

The method according to claim 1,
The process of forming any one of the two joints or the process of forming the other one of the two joints,
Manufacture of a pipe fitting assembly, wherein one end of both ends of the pipe for manufacturing a fitting is formed to have a first extended surface extended to connect with the tubular body, and a support ring member is fixedly installed inside the first expanded surface. Way.

The method according to claim 1,
The process of forming any one of the two joints or the process of forming the other one of the two joints,
Method of manufacturing a pipe fitting assembly characterized in that the other end of the both ends of the pipe for manufacturing the fitting is formed to have a second expansion surface extended to connect with the nipple for the valve.

The method according to claim 1,
The step of installing the adapter,
Method of manufacturing a pipe fitting assembly characterized in that the adapter is inserted into the side of the opposite end of the end portion of the joint portion expansion pipe formed in the both ends of the pipe for manufacturing the fitting.

The method according to claim 1,
The manufacturing method of the pipe fitting assembly further includes a step of heat-treating the pipe for manufacturing a fitting.
The process of heat-treating the pipe for manufacturing the seam,
A method of manufacturing a pipe fitting assembly, characterized in that the pipe for manufacturing a joint formed with a joint is annealed or solution treated.

The method according to claim 1,
The manufacturing method of the pipe fitting assembly further includes the step of forming a protective layer on the pipe side for manufacturing the fitting,
The process of forming a protective layer on the pipe side for the seam production,
A method of manufacturing a pipe fitting assembly, comprising: forming a protective layer by attaching a protective material on an outer surface corresponding to the adapter among the outer surfaces of the pipe for manufacturing the fitting.

The method of claim 6,
The process of forming a protective layer on the pipe side for the seam production,
The shrinkage tube is used as a protective material, and the shrinkage tube is shrunk by hot air to form a protective layer in a state of covering the outer surface of the pipe for manufacturing the fitting.