KR20020057168A - Pipe connection structure - Google Patents

Abstract

PURPOSE: A pipe connection structure is provided to easily connect or separate pipes without using a tool by closely connecting pipes through a simple coupling structure. CONSTITUTION: A fluid inlet/outlet hole(3) is formed in a tank(2). A pipe is connected to the fluid inlet/outlet hole(3) to form a fluid circulation circuit together with other member. The tank(2) is connected to the other member through a pipe. The pipe is required to be bent in order to prevent the interference with respect to the other member in a narrow space, such as an inner room of a vehicle or an engine room. A connector pipe(10) is brazing-coupled to the tank(2). An extension pipe(20) is protruded from the connector pipe(10). A connection member(30) is provided to connect the connector pipe(10) to the extension pipe(20).

Description

Pipe connection structure

The present invention relates to a pipe connector for tightly connecting two pipe piping.

Metal pipes are mainly used as a means for transporting various fluids or gas streams, and these pipes extend the transport distance by connecting the pipes and the pipes by a binding means depending on the length and length of the distance to move the carrier. Alternatively, in the process system, a transfer network is formed by connecting pipes extracted from the system of each process step.

For example, when connecting a cooling system used in an automobile air conditioner, the cooling system forms a refrigerant circulation circuit by connecting refrigerant pipes respectively extracted from a plurality of components by binding means. Since the cooling system is connected to the refrigerant pipes from each other while the components are installed in the room or engine room, the connection must be easy, and in case of unexpected failure, When replacing, it is necessary to consider the workability in a narrow space, such that the connecting pipe must be easily separated.

A connector for connecting a conventional refrigerant pipe or hot water pipe is disclosed in Japanese Patent Application Laid-Open No. 62-60791. This connector forms a first radial end portion on the periphery of the end of the first pipe on one side, and engages a slip for receiving an elastic body having a slide piece formed axially at the first radial end thereof, and the second pipe on the other side. A second radially end portion in which the press-fitting adapter fits in the slip on the outer periphery of the slipper, wherein the tongue of the elastic body is locked to the adapter, and the second radial end of the tongue against the elastic body by rotational movement of the adapter. Forming a stopper protrusion for inserting the locking device into the outer circumferentially inclined portion and the guide hole formed in the slip at a predetermined rotational position of the adapter, and smoothly contacting the elastic member with the circumferentially inclined portion on the tongue. The curved portion is formed to connect two pipes.

According to such a configuration, when the pipe is to be separated, the binding means must be dismantled using a special tool, and thus workability is not good, and there is a disadvantage in that the number of parts for connecting the two members is expensive and expensive.

In view of this, the body consists of a body having a plurality of elastic arms centered on the shaft, the arm having a radially outer portion and an inner portion, the inner portion extending radially inward at a first angle with respect to the axis. The rest of the radially inner part forming a second angle with respect to the axis, the first angle of which allows the tube larger than the second angle to be held in the bore. 203088 has been presented. However, it is easy to combine the pipes but there is a disadvantage that the separation work for separating them is not easy.

It is an object of the present invention to provide a pipe connection that is easily connected and separated by a simple coupling structure, and furthermore, easy to bind and detach without using a tool.

The present invention is a connector pipe coupled to the inlet and outlet of the fluid formed in the tank, a small diameter portion inserted into the inlet and outlet, the middle diameter portion is bent at a right angle from the small diameter portion and expanded and the bottom surface is in contact with the upper surface of the tank, the middle neck portion A large diameter portion extending from and at least two sets of flanges which are bent two stages downward radially outward at the end of the large diameter portion and are not continuous with each other;

An extension pipe connected to the connector pipe to induce a flow of fluid, the extension pipe is connected to the connector pipe and protrudes into a main body having an outer diameter inserted into and in close contact with the middle diameter portion and connected to the connector pipe on the axis of the connector pipe. A ring bead positioned between the large diameter portion and the taper and having an outer diameter substantially the same as the inner diameter of the large diameter portion; And

A connector for closely connecting the connector pipe and the extension pipe in a direction opposite to each other, comprising: a cylindrical body, at least two consecutively bent downwards in two steps radially outward at an end of the body; It includes a tab of the wing and the wing, the inner periphery of the wing is bent upward in two stages and in close contact with the bottom surface of the flange, between the annular pipe of the extension pipe and the connector pipe between the wing and the tab The connector pipe and the extension pipe is tightly coupled by the connector by allowing the flange to be narrowed to provide a pipe connection structure comprising a.

1 is an exploded perspective view showing a pipe connection structure of the present invention,

2 is a front view showing the guider structure of the connector pipe,

3 is a cross-sectional view of the connector is matched with the insertion groove of the connector pipe,

4 is a cross-sectional view showing a state where the connector is located at the starting point of the guider,

Figure 5 is a cross-sectional view showing a state where the connector is located at the end of the guider.

Explanation of symbols on the main parts of the drawings

10 connector pipe 11: small diameter portion

12: middle neck portion 13: taper

14 large diameter part 15 flange

16: guider 17: stopper

18: reverse rotation jaw 19: incision groove

20: extension pipe 22: ring bead

30: connector 31: main body

32: wing portion 33: tab

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. 1 is an exploded perspective view showing a connection structure according to an embodiment of the present invention. Reference numeral 1 denotes a pipe binding device, reference numeral 2 schematically shows a conventional tank, and the tank 2 is provided with an inlet and outlet hole 3 free of inlet and outlet of fluid, and an outlet and inlet hole 3. The pipe is connected to form a fluid circulation circuit with another member not shown.

The tanks 2, which are connected to other members not shown through pipes, are kept at a constant distance from each other, and moreover, in order to avoid interference with other members adjacent to each other in a narrow space, for example, an interior or engine room of a car. It is necessary to bend the pipes, so that the connecting pipes between the members need to be closely connected to each other by the connecting tool.

Reference numeral 10 denotes a connector pipe brazed to the tank 2, 20 an extension pipe extending from the connector pipe, and 30 a connector for closely connecting the connector pipe 10 and the extension pipe.

The connector pipe 10 is coupled to the outlet hole 3 of the fluid formed in the tank 2 as shown in Figures 1 to 3, the connector pipe 10 is inserted into the outlet hole (3) end The small diameter portion 11 is bent at a right angle from the small diameter portion 11, and the pipe is expanded at a right angle and the bottom surface thereof is extended from the middle diameter portion 12 and the middle diameter portion 12, which are in contact with the upper surface of the tank 2. And three flanges 15 which are bent downward in two stages with respect to the radially outer side at the end of the large diameter portion 14.

A taper 13 may be formed or bent between the middle diameter portion 12 and the large diameter portion 14 to form a stepped portion as in the embodiment.

The flanges 15 are divided at regular intervals so as not to be continuous with each other by the cutting grooves 19. In the embodiment, the flanges 15 are divided into three by having three cutting grooves 19. 19 is used as an insertion hole for coupling the connector 30 to be described later.

The flanges 15 include a guider 16 having a continuous gradient on its bottom in the circumferential direction, and the guider 16 has a latitude different from a starting point and an ending point as shown in FIG. The tab 33 of 30 has adhesion as much as the latitude difference. Furthermore, in the embodiment, the stopper 17 is formed at the end of the guider 15 to limit the rotation of the tab 33, thereby limiting the rotation range of the connector 30, and the connector 30 at the front end of the stopper 17. When the connector 30 is set to have a reverse anti-rotation jaw 18 for preventing the loosen by vibration or the like. The guider 16 may be divided in a non-continuous manner with respect to the circumferential direction of the connector pipe 10 to maintain the balance of power and ease of fastening.

As another example, the same effect can be obtained by integrally molding a shape such as the guider 16 on the bottom surface or the circumferential surface of the large diameter portion 14 of the connector pipe 10 during press working.

The extension pipe 20 connected to the connector pipe 10 is connected to be located on the same axis of the connector pipe 10 to induce the flow of the fluid, the connector pipe 10 is connected to the shaft in succession It has the main body 21 which has the outer diameter inserted into the part 12, and the edge part of the said main body 21 contains the annular ring bead 22 of substantially the same diameter as the said large diameter part 14. As shown in FIG. The ring bead 22 is interposed between the taper 13 of the connector pipe 10 via an O-ring 40 to be described later, and the O-ring 40 is crimped by a connector 30 so that the connector pipe ( 10) and the connection portion of the extension pipe 20 is kept tight.

The connector 30 is for connecting the connector pipe 10 and the extension pipe 20 in a direction opposite to each other to closely connect them. The connector 30 is formed in a cylindrical shape and substantially matches the outer diameter of the extension pipe 20. It has a main body 31 having an inner diameter, and has at least three sets of wings 32 bent in two steps downward radially outward at the end of the main body 31 and continuous with the connector 30. The wing portion 32 includes a tab 33 which is bent upward in two stages with an inner circumference, the tab 33 being extended to the guide pipe 16 formed by contacting the guider 16 formed on the bottom surface of the flange 15. 20 is coupled to the connector pipe 10.

And by forming the handle ribs 34 in the longitudinal direction on the outer periphery of the wing portion 32 to prevent slipping when the connector 30 is rotated.

In addition, by forming a triangular reinforcing rib 35 between the bottom of the tab 33 and the end of the annular flange of the wing 32, the extension pipe 20 toward the connector pipe 10 when setting the connector 30 ), The adhesion of both members can be strengthened by responding to the reaction force generated when the) is in close contact.

According to this configuration, the O-ring 40 is inserted into the connector pipe 10, the extension pipe 20 is inserted thereon, and the connector 30 previously inserted into the upper bead 22 is rotated. When the tab 33 is rotated, the extension pipe 20 is gradually compressed to the connector pipe 10 while being guided by the guider 16 formed on the bottom surface of the flange 15 of the connector pipe 10. 20 can be tightly coupled with the connector pipe 10.

3 to 5 sequentially illustrate the bonding process of the present invention. Referring to the drawings, as shown in FIG. 3, the O-ring 40 is seated on the taper 13 through the large diameter portion 14 of the connector pipe 10, and the end portion of the extension pipe 20 is attached to the middle diameter portion 12. When inserted into), the O-ring 40 is positioned between the ring bead 22 and the taper 13 of the extension pipe 20.

Then, when the connector 30 fitted in the extension pipe 20 coincides the wing portion 32 with the cutout groove 19 of the connector pipe 10, and rotates toward the guider 16 formed on the flange 15, As shown in FIG. 4, the guider 16 is inserted into the tab 33 of the connector 30. When the connector 30 is further rotated in this state, the tab 33 gradually follows the gradient of the guider 16. At the same time, the end portion of the main body 31 of the connector 30 presses the upper surface of the ring bead 22 formed in the extension pipe 20, thereby bringing the extension pipe 20 into close contact with the connector pipe 10.

As a result, the main body 31 of the connector 30 compresses the annular bead 22 of the extension pipe 20, whereby the extension pipe 20 comes into close contact with the connector pipe 10 and the annular bead 22. The O-ring 40 is positioned at a lower portion thereof, and the O-ring 40 is tightly squeezed between the ring bead 22 of the extension pipe 20 and the taper 13 of the connector pipe 10. This prevents the leakage of the fluid. Through this coupling process, the tab 33 formed on the connector 30 moves to the end point of the guider 16, and is no longer rotated by the stopper 16 located at the end point of the guider 15. On the contrary, the tab 33 is positioned between the stopper 16 and the counterrotation stopper 18 by the counterrotation stopper 18 facing the stopper 16, so that the tab 33 is not released by vibration or other external force. do.

As described above, the present invention can simplify the assembly of the connector pipe and the extension pipe, thereby reducing the number of assembly operations, thereby improving productivity and reducing costs.

In addition, it is possible to respond to changes in the pipe connection structure by vehicle type or other to the connector pipe and the common use, it is possible to reduce the development cost and facilitate management.

Claims (8)

A connector pipe coupled with the inlet and outlet of the fluid formed in the tank, The connector pipe may include a small diameter portion inserted into the outlet hole; A middle diameter portion that is bent at a right angle from the small diameter portion and is expanded and whose bottom surface is in contact with the upper surface of the tank; Large diameter portion extending from the middle neck portion; And At least two sets of flanges bent in two stages downward radially outwardly at the end of the large diameter portion and not continuous with each other; An extension pipe connected to the connector pipe to induce the flow of fluid, The extension pipe has a body having an outer diameter which is inserted in close contact with the middle diameter portion in series on the axis of the connector pipe; And A round bead protruding to the outer periphery of the main body and positioned between the large diameter part and the taper when coupled to the connector pipe and having an outer diameter substantially equal to the inner diameter of the large diameter part; And As a connector for close connection between the connector pipe and the extension pipe in a direction opposite to each other, The connector is a cylindrical body; At least two or more sets of wings bent in the radially outward end at the end of the main body and continuous with the connector; A tab that protrudes into the inner circumference of the wing and is bent upward in two stages and is in close contact with the bottom of the flange; And And the connector pipe and the extension pipe are tightly coupled by the connector by allowing the ring bead of the extension pipe and the flange of the connector pipe to be squeezed between the wing portion and the tab. According to claim 1, wherein the flange formed on the connector pipe comprises a guider, the bottom surface of the continuous curvature in the circumferential direction on the bottom surface, characterized in that the start point and the end point of the guider has a different latitude Pipe connection structure. The pipe connecting structure according to claim 2, wherein a stopper is formed at the end of the guider to limit rotation of the tab. The pipe connecting structure according to claim 2, wherein the guiders are divided into at least two or more sets so as not to be continuous with each other over the circumferential direction of the connector pipe. The pipe connecting structure according to claim 1, wherein a taper is formed between the middle and large diameter portions of the connector pipe. The pipe connecting structure according to claim 1, wherein the middle and large diameter portions of the connector pipe are bent to form stepped portions. The pipe connecting structure according to claim 1, wherein each of the wing parts of the connector has a handle rib formed in a longitudinal direction at an outer circumference thereof. The pipe connecting structure according to claim 1, wherein the pipe has a reinforcing rib on a bottom surface of the tab formed on the wing of the connector.