KR20090002986U - Joint structure of coupling for gas pipe - Google Patents

Abstract

In the present invention, when connecting a fluid transfer pipe such as a gas pipe to the installation direction of the pipe according to the conditions of the piping location or to apply a pipe having a different thickness, the straight connector, elbow connector, "T" shaped A gas pipe connection that greatly improves the airtightness of the joint of a pipe or auxiliary connector to a connector such as a connector, maintains the joint structure firmly, and facilitates the connection of the connector. The joint structure of the tube is disclosed.

The present invention integrally forms an extension having the same inner diameter as the outer diameter of the tube or auxiliary connector at the end of the inlet and outlet of any one of the straight connector, the "T" connector, elbow connector In addition, the inner end of the extension portion of the tube or auxiliary connecting tube is inserted into the expansion to form an annular locking jaw so as to prevent further entry into the inside, and the tube or auxiliary connection pipe It is configured to weld and join together the inlet part of the extension part and the circumferential surface of the pipe or auxiliary connecting tube that is in close contact with the inlet part in a state of being fitted into the extension part.

Gas Pipes, Connectors, Extensions, Welding

Description

JOINT STRUCTURE OF COUPLING FOR GAS PIPE}

The present invention relates to a joint structure of a connecting pipe for gas pipe, and more particularly, a straight type applied to change the installation direction of the pipe or to apply a pipe having a different thickness depending on the conditions of the pipe location when the fluid transfer pipe such as a gas pipe is connected to the pipe. Significantly improve the airtightness of the joints of pipes or auxiliary connectors for connectors such as connectors, elbow connectors, "T" connectors, and maintain the joint structure firmly. And it is to make the connection of the connector can be made easily.

In general, the pipe is mainly used for transporting fluids or powders such as gas or liquid, or for protecting wires and cables when wiring in the ground or indoors. Piping is reasonably installed in consideration of various requirements such as the flow rate of the fluid to be transported through the pipe, which is the passage of the fluid constituted by the pipe, physical property values such as pressure and flow rate, and frictional resistance. .

On the other hand, a separate connecting pipe is used to change the installation direction of the pipe in the middle of the long piping work or use a pipe of different thickness as needed.

Representative of the connector, there is a straight connector, elbow connector and "T" type connector, the pipe is directly connected to the connector when piping work, or a separate auxiliary connector connected to the connector After that, the other pipe is connected.

1 and 2 show a conventional structure for connecting a tube or an auxiliary connector to such a connector.

1 is a cross-sectional view showing an embodiment of a joint structure of a tube for a conventional connector, according to the design on the inner peripheral surface of the inlet 11 and outlet 12 formed in the "T" shaped tube 10 The threaded portion 13 is formed over a predetermined length range, and correspondingly, the threaded portion 15 is formed on the outer peripheral surface of the end portion of the tube 14 connected to the inlet 11 or the outlet 12 on the connecting tube 10. Formed.

In the conventional pipe joint structure, the threaded portion 15 formed at the outer end of the pipe 14 is fitted to the threaded portion 13 formed at the inner circumferential surface of the inlet 11 and the outlet 12 on the connection pipe 10. Since it seems easy to work at first glance, there is a serious problem that the fluid leaks while rusting or screwing the threaded portion (13) (15) over time, a fine gap occurs in the threaded portion.

On the other hand, Figure 2 is a cross-sectional view showing an embodiment of the auxiliary connector joint structure for the conventional connector, the auxiliary connector 16 on the end face of the inlet 11 and outlet 12 formed in the connector (10). The end faces of the surfaces were brought into close contact with each other and welded from the outside along the boundary line.

However, in the joint structure of such a conventional connecting pipe, the end faces of the auxiliary connecting pipe 16 are exactly matched with the end faces of the inlet 11 and the outlet 12 on the connecting pipe 10 and welded along the joint line thereof. Since the welding operation is very inconvenient and difficult, it has to be a problem, and when the welding part is exposed to goslan and an impact force is applied from the outside, a crack is generated in the welding part 18 or the welding part 18 is detached in severe cases. (I) there is a problem that the fluid flowing along the conduit leaks.

In this way, if the fluid flowing along the pipe is a liquid such as water or oil, even if it leaks, it is possible to check the appearance and can cope with it, but there is a problem that the risk of explosion accident is very high because the gas is not visible.

On the other hand, in addition to the conventional case described above, Utility Model Registration Publication No. 20-0170280 (Pipe Fitting Structure) and Utility Model Registration No. 20-0387752 (Assembly connecting pipe and elbow for pipe connection) and Utility Model Registration No. 20-0315768 An arc (pipe end) has been proposed as prior art.

The prior art of the Utility Model Registration Publication No. 20-0170280 is a pipe joint structure, in which a joint pipe for accommodating another pipe is integrally formed at one end of the pipe, and is located at an inner predetermined position from the accommodation portion formed at the joint pipe. The other receiving part is formed, and the other receiving part is inserted into the fixing ring protruding annularly at an inclined angle at an angle in the insertion direction of the tube into which the plurality of fixing pins are inserted toward the center of the joint pipe. there is a problem.

In addition, the prior art of Utility Model Registration No. 20-0387752 is to form a small diameter fitting piece that can fit into the inside of the pipe at the end of the one-pipe elbow or the "T" elbow, the hollow inside, This prior art is not applied to fluid transfer pipes such as gas pipes, but is applied to handrails, verandas or fences.

In addition, the prior art of the Utility Model Registration No. 20-0315768 is connected to a fixture having a plurality of incisions in the main body in the connector consisting of a main body with a threaded portion on the outer circumferential surface, and a cap coupled to the threaded portion of the main body and a tube insertion hole formed in the center thereof. , But is related to the pipe connector is applied to the water pipe or the pipe for the boiler is configured to be mounted on the upper inner circumferential surface of the main body, there is a problem that the structure is very complicated, the air tightness after the pipe joint is difficult to maintain.

The present invention is a straight connector, elbow connector, "T" shaped to be applied to change the installation direction of the pipe or to apply a pipe having a different thickness depending on the conditions of the piping location when the fluid transfer pipe, such as a gas pipe, is piped. Significantly improve the airtightness of the joints of pipes or auxiliary connectors for connectors such as connectors, ensure that the joint structure is maintained firmly, and make the connection of the connectors easy It is a task.

In order to solve the above problems, the joint structure of the gas pipe connector according to the present invention is a pipe at the end of the inlet and outlet of any one of the connector selected from the straight connector, "T" shaped connector, elbow connector Or an integrally formed extension having the same inner diameter as the outer diameter of the auxiliary connector, and an inner end portion of the extension to announce the tube or auxiliary connection tube into the extension so that it does not enter the inside anymore. It forms a locking jaw of, and has a feature of welding the circumferential surface of the pipe or the auxiliary connector in close contact with the inlet and the inlet of the extension in the state of coupling the tube or auxiliary connector into the expansion portion on the connecting pipe. .

Applying the present invention, since the expansion portion having the same inner diameter as the outer diameter of the tube or auxiliary connection pipe is integrally formed at the end of the inlet and outlet of the connection pipe, and the locking jaw is formed at the inner end of the expansion pipe. If the pipe or auxiliary connector is welded into the expansion part on the connecting pipe when welding the inlet part of the extension part and the circumferential surface of the pipe or auxiliary connection pipe which is in close contact with the inlet part, the joint of the pipe is completed. The effect is very simple.

In addition, since the pipe or the auxiliary connection pipe is inserted into the expansion portion on the connection pipe, the joint structure of the pipe is very firmly maintained, and the airtightness and sealability are greatly improved, so that the fluid flowing along the pipe leaks even after a long time. It does not have the effect of greatly improving the reliability.

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

3 is an exploded perspective view showing a joint structure of the gas pipe connection pipe according to the present invention, Figure 4 is a cross-sectional view showing the joint structure of the gas pipe connection pipe according to the present invention.

With reference to this, the present invention greatly improves the airtightness of the joints of the pipe or auxiliary connector to the connector, ensures that the joint structure is firmly maintained, so that the connector joint operation can be made easily It is.

To this end, the joint structure 30 of the gas pipe connector according to the present invention is generally any one of the connector selected from the straight connector, "T" -shaped connector, elbow connector used in the pipe work of the gas pipe ( 32) may apply.

In the present invention, the inlet 34 and the outlet 36 of the connecting pipe 32 is configured to be integrally formed with an expansion portion 40 having the same inner diameter as the outer diameter of the pipe or auxiliary connecting pipe 38. At the inner end of the expansion part 40, when the tube or auxiliary connection pipe 38 is fitted into the expansion part 40, the inner end of the expansion part 40 prevents the inner end from entering any further. The jaw 42 is configured to be formed.

In addition, the tube or auxiliary connecting pipe 38 is inserted into the expansion part 40 on the connection pipe 32 to be in close contact with the inlet part 40a of the expansion part 40 and its inlet part 40a. It is configured to weld the circumferential surfaces of the pipe or auxiliary connecting pipe 38 to each other.

In the present invention, the peripheral portion of the outer end of the auxiliary connection pipe 38 may be formed with a screw portion (38a) for connection with other pipes.

The operation of the present invention made as described above is as follows.

Referring to FIGS. 3 and 4, first, in the process of piping the gas pipe, it is necessary to branch the pipe according to the surrounding conditions, or to change the pipe direction as necessary, the "T" shaped connector or elbow. Type connectors may be applied, and straight connectors may be applied if the size of the tube is to be changed.

If you want to connect the tube or auxiliary connector 38 using such a connector 32, as shown in Figure 3, one end of the tube or auxiliary connector 38 in accordance with the present invention The inner end of the expansion portion 40 integrally formed at the outer end of the 34 and the outlet pipe 36 is inserted into the locking jaw 42.

In this state, the outer circumferential surface of the tube or auxiliary connecting pipe 38 is in close contact with the inner circumferential surface of the expansion portion 40, and in this state, the inlet of the expansion portion 40 is shown in FIG. 4. The outer circumferential surface of the pipe 40a and the auxiliary connection pipe 38 that are in close contact with the portion 40a and the inlet portion 40a are welded together.

In this way, the inner end of the tube or auxiliary connector 38 is in a state of being tightly fitted into the expansion portion 40 on the connector 32, so that it is not easily detached or detached by an external shock, The inlet portion 40a of the portion 40 and the circumferential surface of the pipe or auxiliary connecting pipe 32 closely attached thereto are joined by welding to be sealed, so that the airtightness is greatly improved so that the fluid flowing along the pipe is not leaked at all. It will not be.

In addition, when the threaded portion (38a) is formed on the outer peripheral surface of the outer end of the auxiliary connection pipe 38 can be easily connected to other pipes.

1 is a cross-sectional view showing an embodiment of a joint structure of a pipe for a conventional connecting pipe.

2 is a cross-sectional view showing an embodiment of an auxiliary connector joint structure for a conventional connector.

3 is an exploded perspective view showing the joint structure of the connection pipe for a gas pipe according to the present invention.

Figure 4 is a cross-sectional view showing the joint structure of the connection pipe for a gas pipe according to the present invention.

* Description of the symbols for the main parts of the drawings *

32: connector 34: inlet

36: outlet 38: auxiliary connector

40: expansion portion 42: locking jaw

Claims (1)

The outer diameter of the tube or auxiliary connector 38 at the ends of the inlet 34 and outlet 36 of any one of the connector 32 selected from the straight connector, the "T" connector and the elbow connector; An extension 40 having the same inner diameter is formed; An inner end portion of the extension part 40 forms an annular locking jaw 42 that prevents further entry into the inside when the tube or auxiliary connecting pipe 38 is fitted into the extension part 40. To; Pipe or auxiliary closely contacted to the inlet portion 40a of the expansion portion 40 and its inlet portion 40a in a state where the tube or auxiliary connector 38 is inserted into the expansion portion 40 on the connection tube 32. A joint structure of a gas pipe connecting pipe, characterized in that the welding the circumferential surface of the connecting pipe 38 together.

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