KR20130086908A - A pipe connector - Google Patents

Abstract

PURPOSE: A device to connect pipes is provided to prevent the pipe from shrinking by suppressing quantities that a tooth unit enters the pipe under high pressure and to prevent the reduction of quantities of fluid passing through. CONSTITUTION: A device (100) to connect pipes comprises a connection body (110), a packing member (130), an anti-separation ring (120), and a joint nut (140). The packing member is inserted into an expansion pipe unit (113) and seals a gap between the pipe and the expansion pipe unit. The anti-separation ring integrally includes an anti-separation unit (125) and a packing settling unit (121), prevents the pipe from separating, and supports the packing member. The joint nut is screw-connected to an outer circumferential surface of the connection body. A pressing unit (141) is formed to press the packing member inside the expansion pipe unit on an inner circumferential surface of the joint nut.

Description

A pipe connector

The present invention relates to a pipe connector, and more particularly, to a pipe connector having a detachment preventing part and a packing seating part integrally formed in a departure prevention ring for preventing the pipe from coming off.

In general, various types of pipe fittings are known as a medium for connecting to a synthetic resin pipe (soft pipe or hard pipe) or a metal pipe. For example, referring to FIG. 1,

The pipe connector 1 includes a connection socket 10 in which a receiving portion 11 and an expansion pipe portion 12 are formed to accommodate an end of the pipe 5, and an expansion pipe portion 12 of the connection socket 10. The separation prevention ring 20 which is sequentially stacked in, the auxiliary ring 30 and the O-ring 40, and the fastening nut 15 is screwed to the outer peripheral surface of one end of the connecting socket 10.

The release preventing ring 20 is formed by forming a plurality of bending pieces 21 bent inclined toward the pipe 5 side on the upper end of the cylindrical support ring 22. At this time, the end of the bending piece 21 is formed to be pointed so that the pipe 5 can easily penetrate.

The auxiliary ring 30 provides the seating surface of the O-ring 40.

The O-ring 40 is in close contact with the outer circumferential surface of the pipe 5 and the inner circumferential surface of the expansion pipe 12 when screwing the tightening nut 15 to maintain airtightness.

Meanwhile, the synthetic resin pipe 5 can be easily deformed when hot water flows therein, and when the pipe 5 is deformed, the synthetic resin pipe 5 is not sealed and leakage occurs. Therefore, The tube 6 is inserted.

Therefore, after inserting the separation preventing ring 20, the auxiliary ring 30, and the O-ring 40 into the expansion pipe 12 of the connecting socket 10, the connecting nut 15 is connected to the connecting socket. Temporarily assemble to one end of (10).

Thereafter, when the pipe 5 is fully screwed in the state in which the pipe 5 is inserted into the receiving portion 11 of the connecting socket 10, the O-ring 40 in the receiving portion 11, The auxiliary ring 30, the separation prevention ring 20 is pressed, in this process the O-ring 40 is in close contact with the outer peripheral surface of the pipe (5) and the inner peripheral surface of the expansion pipe 12, the separation As the prevention ring 20 is inclined bent piece 21 is in close contact with the outer peripheral surface of the pipe 5 is to prevent the separation of the pipe (5) as well as to maintain the airtight.

However, in the conventional pipe connector 1, a separate support pipe 6 is inserted into the pipe 5 to support the synthetic resin pipe 5, and a separate pipe There is a problem that the number of parts increases and the cost increases because the auxiliary ring 30 must be installed.

In addition, there is a problem that as the support tube 6 is inserted into the pipe 5, the internal passage is narrowed, thereby decreasing the amount of fluid passing therethrough.

If the support pipe 6 is not used, the bending pieces 21 of the release preventing ring 20 are pushed into the synthetic pipe 5 while pressing the outer circumferential surface of the pipe 5, ,

At this time, if the bending pieces 21 having a large turning radius continuously push the outer circumferential surface of the pipe 5, the pipe 5 will be broken and the sealing will not be performed, and the passage in the pipe 5 will be narrowed, When the bending pieces 21 of the release preventing ring 20 penetrate deeply into the pipe 5, a hole is formed in the pipe 5 to generate a leakage, The inclined angle of the bending piece 21 is expanded in the process of deeply digging into the pipe 5, and the problem of preventing the pipe 5 from escaping is lost.

In order to solve the above problems, an object of the present invention is to provide an anti-departure prevention ring and a packing seating part integrally provided in a release preventing ring for preventing the pipe from being separated, The separation part can be omitted to support the packing member, thereby reducing the cost, and the separation preventing part is constituted by a straight part facing the pipe and a toothed part tilted to the pipe side, wherein the tooth part and the straight part are partly resilient By forming a plurality of cut-away portions to move, the supporting force of the pipe is increased, so that it is possible to further prevent the pipe from being separated from the pipe. Further, it is possible to prevent the pipe from being pinched by suppressing the amount of the piercing- As a result, a separate support pipe inserted into the pipe can be omitted, And to prevent a passage in the pipe from being narrowed, thereby preventing a decrease in the amount of fluid passing therethrough.

According to an aspect of the present invention, there is provided a pipe connection port for connecting a pipe, wherein a fluid passage is formed so as to allow a fluid to pass therethrough, and at one end of the fluid passage, A packing member inserted into the expanded portion and sealing the space between the expanded portion and the expanded portion; a sealing member disposed between the sealing member and the bottom of the expanded portion, And a packing seating part on which the packing member is seated, so as to prevent separation of the pipe and to support the packing member, and an outer circumferential surface of the connection body, And a tightening nut having a pushing portion for urging the packing member in the expanded portion. .

The present invention is characterized in that the release preventing ring and the packing seating portion are integrally provided in the release preventing ring for preventing the pipe from coming off so that the packing member can be directly attached to the release preventing ring, The cost can be reduced.

In addition, since only the tooth portion is pierced into the outer circumferential surface of the pipe while the lower end of the straight portion of the departure prevention portion is in contact with the outer circumferential surface of the pipe to catch the pipe, It is possible to keep the pipe from being pushed inward as much as possible, thereby omitting the support pipe separately inserted into the pipe, thereby reducing the number of products and reducing the cost.

The separation preventing portion is formed by a straight portion facing the pipe and a teeth portion inclined to the pipe side. By forming a plurality of cut-out portions so that the teeth and the straight portion move partly, the supporting force of the pipe is increased, And it is possible to prevent the pipe from being shrunk by suppressing the amount of the penetration of the teeth into the pipe even when the pressure is high. As a result, a separate support pipe inserted into the pipe can be omitted, It is possible to prevent the passage of the fluid from being reduced.

Further, in forming the incision portion, the incision is started from a position spaced apart from the packing seating portion by a predetermined distance in the downward direction, so that the length of the incision prevention portion is shortened, that is, the length of the incision portion is short, As the role increases, the restraining force is further increased, which can improve the pipe departure prevention function.

In addition, since the planar portion is formed between the penetrating pieces of the tooth portion and the straight portion facing the pipe is provided in the separation preventing portion, it is possible to prevent the teeth from digging into the pipe continuously.

In addition, by integrally forming the packing seating portion on the release preventing ring, the lower side of the packing member can be stably supported when the packing member is pressed by the tightening nut, so that the sealing ability can be improved.

By forming the protrusions and depressions in the pressing portion of the tightening nut for pressing the packing member, loosening of the tightening nut can be prevented even if vibration occurs.

In addition, by providing the intermediate ring between the release preventing ring and the packing member, the packing member is prevented from entering along the pipe even if the inner diameter of the packing member is smaller than the outer diameter of the pipe.

1 is a cross-sectional view showing a conventional pipe connector,
2 is an exploded perspective view showing a pipe connector according to the present invention.
Figure 3 is a perspective view of the separation prevention ring in the pipe connector according to the invention,
4 is a perspective view showing another embodiment of a departure prevention ring in a pipe connector according to the present invention,
FIG. 5 is a cross-sectional view illustrating a state where a pipe is inserted after a tightening nut is assembled in a pipe connector according to the present invention. FIG.
FIG. 6 is a cross-sectional view showing a state in which the teeth of the diversion prevention ring digs into the pipe after the tightening nut is completely screwed in the pipe connector according to the present invention,
FIG. 7 is a sectional view showing another embodiment of a packing member provided between the connecting body and the connecting member in FIG. 5;
8 is an exploded perspective view showing a case where an auxiliary separation preventing ring is provided between a separation preventing ring and a packing member in a pipe connector according to the present invention,
9 is an exploded perspective view showing a case where a middle ring is provided between a separation preventing ring and a packing member in a pipe connector according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown, the pipe connector 100 according to the present invention is a connector for connecting the pipe 5, as well as a connector for connecting the pipe to the pipe, as well as pipes such as various valves, elbows, tees, etc. Applicable to all products to connect.

In addition, the pipe 5 may be a hard or soft synthetic resin pipe and a metal pipe.

The pipe connection port 100 includes a connection body 110, a packing member 130, a separation prevention ring 120, and a tightening nut 140.

First, the connection body 110, the fluid passage 111 is formed so that the fluid passes therein, the insertion portion 112, the pipe 5 is inserted into one end of the fluid passage 111 and The insertion part 112 and the stepped gap expansion portion 113 is formed.

At this time, the insertion portion 112 is formed with a diameter larger than the diameter of the fluid passage 111 is stepped with the fluid passage 111, the expansion portion 113 is a diameter larger than the diameter of the insertion portion 112 Is formed.

In addition, an end portion of the pipe 5 is inserted into the insertion portion 112, and the release preventing ring 120 and the packing member 130 are inserted into the expansion pipe 113.

On the other hand, the connection body 110 may use a variety of materials, such as plastic or metal.

Then, a screw portion 114 is formed on the outer circumferential surface of one end of the connecting body 110 to be screwed with the tightening nut 140.

On the other hand, the shape of the connection body 110 is shown as an example, it can be changed in various forms depending on the product to be applied, such as valves, elbows, tees.

That is, the shape of the opposite side of the side of the connecting body 110 is inserted into the pipe 5 can be formed in various forms depending on the object to be connected or the product (valve, elbow, tee, etc.) to be applied.

The connection body 110 is formed to have a structure for screw connection with the connection member 200 of the air conditioner. .

Referring to FIG. 1, a packing seating part 115 is formed in a stepped portion with respect to the fluid passage 111 in a side opposite to a side where the pipe 5 is inserted in the connection body 110.

Here, a packing member 116 is seated on the packing seating part 115. As the packing member 116, various packing members such as a rectangular cross section and a triangular cross-section may be used as well as an O-ring having a circular cross section.

A threaded portion 115a is formed on the inner circumferential surface of the packing seating portion 115 so as to be screwed to the threaded portion 201 formed on the outer circumferential surface of the connection member 200. [

At this time, it is preferable that the threaded portion 115a is omitted in the inner circumferential surface portion of the packing seating portion 115 where the packing member 116 is in contact.

On the other hand, the inclined surface portion 202 is formed at the end of the connecting member 200 in which the packing member 116 is interposed, so that the sealing member is stably interposed with the packing member 116 to improve the sealing performance.

7 is a cross-sectional view showing another embodiment of the packing member. As shown in the figure, the packing member 116 includes a head ring portion 116a and a head portion 116a extending downward from the head ring portion 116a. And a body ring portion 116b formed to have a smaller width than the ring portion 116a.

At this time, the head ring portion 116a may be formed in various shapes such as a circular cross section, a rectangular cross section, and a triangular cross section.

In addition, a packing groove 203 for fitting the body ring portion 116b is formed on the outer circumferential surface of one end of the connecting member 200. [

Therefore, when the threaded portion 115a of the connecting body 110 is screwed into the threaded portion of the connecting member 200, the packing member 116 is inserted into the packing seating portion 115, the slope portion 202, And the sealing property is further improved by being filled in the groove 203.

That is, the head ring portion 116a of the packing member 116 is brought into surface contact with the packing seating portion 115 and the slope surface portion 202 while the body ring portion 116b is in contact with the packing seating portion 116b 115 and the packing groove 203 to be in surface contact with each other, thereby further improving the sealability.

The packing member 130 is inserted into the expansion pipe 113 of the connection body 110 to seal between the pipe 5 and the expansion pipe 113.

The packing member 130 preferably uses an O-ring, and as shown in the drawing, one may be installed or a plurality of layers may be stacked.

Therefore, when the packing member 130 is pressed due to the screwing of the tightening nut 140, the packing member 130 is closely adhered to the outer circumferential surface of the pipe 5 and the inner circumferential surface of the expansion pipe 113 to maintain airtightness. Done.

The release preventing ring 120 is provided in the expanded portion 113 and is disposed between the packing member 130 and the bottom of the expanded portion 113 and is in contact with the outer peripheral surface of the pipe 5, And a packing seating part 121 on which the packing member 130 is seated to integrally include the separation preventing part 125 and the packing member 130 to prevent separation of the pipe 5 and support the packing member 130.

The release preventing ring 120 includes a packing seating part 121 formed in a flat plate shape so that the packing member 130 is seated and supporting the packing member 130 and a packing receiving part 121 formed on the outer peripheral surface of the packing seating part 121 A support part 122 which is bent in a downward direction and is seated on the bottom of the expansion part 113 and a supporting part 122 which is bent in a downward direction on the inner circumferential surface of the packing seating part 121 and which faces the outer peripheral surface of the pipe 5 And a tooth portion 127 bent at a predetermined angle to the pipe 5 toward the pipe 5 at an end of the straight portion 126 and the straight portion 126 and contacting or crushing the outer circumferential surface of the pipe 5, 125).

The rectilinear section 126 of the departure prevention part 125 may be vertically formed parallel to the pipe 5 or may be formed to be inclined at a predetermined angle to the pipe 5, have.

That is, when the pipe 5 is heated to a high temperature or a high pressure, the pipe 5 tries to escape from the connection body 110 in the outward direction. In this process, the teeth 127 of the release- Is strongly contacted to the outer circumferential surface of the pipe 5 or is pushed into the outer circumferential surface of the pipe 5 as shown in FIG. 6, thereby preventing the pipe 5 from being separated.

At this time, only the teeth 127 of the separation preventing part 125 penetrate the outer circumferential surface of the pipe 5, and since the wide surface of the rectilinear part 126 faces the outer circumferential surface of the pipe 5, It does not penetrate the outer peripheral surface of the pipe 5 and serves to support the pipe 5 when it is prevented from being separated.

The rectilinear section 126 of the departure prevention part 125 is required to stand at an angle of 90 degrees or 90 degrees to prevent the pipe 5 from escaping.

Since only the teeth 127 of the separation preventing part 125 penetrate the outer circumferential surface of the pipe 5 to prevent the teeth 127 from digging the outer circumferential surface of the pipe 5 excessively, 5 does not have a hole.

Only the teeth 127 are pierced into the outer circumferential surface of the pipe 5 in a state in which the lower end of the rectilinear section 126 of the departure prevention portion 125 contacts the outer circumferential surface of the pipe 5, The inclination angle of the teeth 127 is not substantially unfolded so that the separation preventing function can be maintained and the pipe 5 can be prevented from being pushed inward to the maximum extent. 5, it is not necessary to insert a separate support tube.

By preventing the pipe 5 from being pushed inwardly by the release preventing ring 120 and omitting a separate support pipe inserted inside the pipe 5, the number of parts can be reduced, And it is also possible to prevent the inner passage of the pipe 5 from being narrowed, thereby preventing a decrease in the amount of fluid passing therethrough.

The support portion 122 and the straight portion 126 of the release prevention ring 120 are each formed in a cylindrical shape. Of course, the rectilinear section 126 may be inclined at a certain angle from the cylindrical shape to the pipe 5 side.

A plurality of cut-out portions 128 spaced from each other in the circumferential direction are formed in the separation preventing portion 125 so that the teeth 127 can be elastically moved toward the pipe 5, (127) is divided into a plurality of parts.

The cutout portion 128 is formed to cut from a specific point of the straight line portion 126 spaced apart from the packing seating portion 121 by a predetermined distance down to the end of the tooth portion 127, (127) and a part of the rectilinear section (126) are elastically moved.

That is, if the entirety of the departure prevention portion 125 including the straight line portion 126 and the teeth portion 127 is cut into the cutout portion 128, The separation preventing part 125 can be easily extended when the teeth part 127 penetrates the outer circumferential surface of the pipe 5. When the separation preventing part 125 is easily extended, ) Is lost, which is not preferable.

Therefore, in forming the cut-out portion 128, the cut-out portion 125 starts to cut from a position spaced apart from the packing seating portion 121 by a predetermined distance in the downward direction. As a result, Since the length of the incision part 128 is short and the pipe 5 is prevented from coming off,

In the meantime, the release preventing portion 125 elastically moves only the portion from the starting point of the cut-off portion 128 (a part of the straight line portion 126 and the teeth portion 127) 5, the radius of rotation of the tooth portion 127, which is in contact with or digs into the outer circumferential surface of the tooth portion 127, also becomes smaller than the conventional one. This makes it possible to suppress the pipe 5 from being shrunk as much as possible.

3, the tip of the teeth 127 may be formed in a round shape as shown in FIG. 3. In this case, the teeth 127 may be formed in various shapes depending on the material of the pipe 5. In the case of the metal pipe 5, It is possible to smoothly carry out the departure-avoiding function in the case of forming the pipe 5 in the form of a flat surface or in the case of the synthetic resin pipe 5. In the case of the synthetic resin pipe 5, It is preferable to form a sharp point so that it can dig in.

That is, in the case of the synthetic resin pipe 5, a plurality of pointed plural tooth portions 127 are formed at the ends of each of the plurality of teeth portions 127 divided by the cutout portion 128 so that the outer peripheral surface of the pipe 5 can be easily pierced. It is preferable to form the penetrating pieces 127a.

At this time, it is preferable that a plurality of penetrating pieces 127a formed on each of the teeth 127 are formed for each tooth 127 as shown in the drawing.

In addition, a plurality of penetrating pieces 127a are spaced apart from each other by a predetermined distance, and a planar portion 127b is formed between the teeth 127.

That is, when the flat portion 127b is formed in the tooth portion 127, a plurality of penetrating pieces 127a of the teeth 127 are formed on the outer peripheral surface of the pipe 5, And at this time, it is caught by the flat surface portion 127b and can not dig into any more.

Although the penetration piece 127a can be prevented from being continuously pierced by the straight portion 126 of the separation preventing portion 125 as well, It is possible to prevent the pipe 5 from being pushed in continuously.

Accordingly, the separation preventing part 125 may dig into the pipe 5 only to the position of the plane part 127b of the tooth part 127 (end position of the straight part 126), and then stop.

In addition, the packing seating part 121 of the separation preventing ring 120 is formed in a flat plate shape, thereby providing a seating surface on which the packing member 130 can stably be seated.

The packing seating part 121 stably supports the lower surface of the packing member 130 when the packing member 130 is pressed by the tightening nut 140 when the tightening nut 140 is screwed , And the sealing performance is improved.

It is also possible to prevent separation of the pipe 5 through the separation preventing ring 120 and also to provide a seating surface for seating the packing member 130 so that the packing member 130 is installed separately It is possible to omit a component (conventional auxiliary ring), thereby reducing the cost.

The tightening nut 140 is screwed to the outer circumferential surface of the connecting body 110 and the inner circumferential surface of the tightening nut 140 is provided with an urging portion 141 protruding downward to urge the packing member 130 in the expanded portion 113 .

The lower end surface of the pressing portion 141 of the tightening nut 140 is provided with a concave and convex portion for pressing the plurality of points on the surface of the packing member 130 to prevent the tightening nut 140 from being loosened when the tightening nut 140 is screwed. (142) is formed.

The concave and convex portions 142 are formed in a sawtooth shape so that when the tightening nut 140 is screwed, the serrated projections 142 press the upper surface of the packing member 130, 130 are bent. Therefore, even if vibration occurs, the serration-shaped protrusions 142 are caught by the upper curved surface of the packing member 130, so that the tightening nut 140 is not released.

When a plurality of protrusions (not shown) are formed at regular intervals in the circumferential direction on the upper and lower sides of the O-ring so as to form a curved surface in advance, since the packing member 130 is made of O-rings, The unevenness 142 of the fastening nut 140 is caught by the protruding portion of the packing member 130, so that the tightening nut 140 can be prevented from being loosened.

8, when the pipe 5 is inserted, the packing member 130 is inserted between the separation preventing ring 120 and the packing member 130 in the pipe-expanding portion 113, The auxiliary detachment prevention ring 150 is formed in the shape of a flat ring, and the inner circumferential surface of the auxiliary detachment prevention ring 150 is connected to the pipe 5 And a plurality of escape preventing pieces 151 are formed to contact the outer circumferential surface of the pipe 5 or to be pierced.

That is, when the inner diameter of the packing member 130 is much smaller than the outer diameter of the pipe 5, the end of the pipe 5 is inserted into the packing member 110 in the process of inserting the pipe 5 into the connection body 110 130, and at this time, if the pipe 5 is continuously inserted, there may arise a problem that the packing member 130 enters along the pipe 5.

Therefore, even if the inner diameter of the packing member 130 is smaller than the outer diameter of the pipe 5 by providing the auxiliary separation preventing ring 150 between the separation preventing ring 120 and the packing member 130, (130) is prevented from entering along the pipe (5).

In addition, when the pipe 5 is made of soft material, the teeth 127 of the release-preventing ring 120 can easily penetrate the outer peripheral surface of the pipe 5, When the pipe 5 is made of a hard material, the tooth portion 127 of the release prevention ring 120 contacts the outer circumferential surface of the pipe 5, Can be weaker than the soft pipe (5).

Therefore, an auxiliary separation prevention ring 150 is provided above the separation prevention ring 120 so as to strongly contact the outer circumferential surface of the rigid pipe 5, so that the separation prevention ring 120 can be weakened only by the separation prevention ring 120 Function is assisted by the auxiliary departure prevention ring 150, thereby further improving the departure-avoidance function.

However, since the auxiliary detachment prevention ring 150 has a simple structure, the detachment prevention ring 120 is relatively harder than the detachment prevention ring 120, And a metal material having high strength, so that the outer circumferential surface of the rigid pipe 5 is strongly watered.

In the case where there is no supporting pipe in the soft pipe 5, both the tooth portion 127 of the separation preventing ring 120 and the separation preventing pieces 151 of the auxiliary separation preventing ring 150 are both flexible pipes It is possible to further prevent the pipe 5 from being pushed inwardly by holding the circular shape of the pipe 5 by digging into the outer peripheral surface of the pipe 5.

If the pipe 5 is made of soft material, the auxiliary detachment prevention ring 150 may be omitted. If the pipe 5 is rigid, the auxiliary detachment prevention ring 150 may be omitted. Is preferably used. The auxiliary separation preventing ring 150 may be selectively used depending on the material of the pipe 5.

9 is an exploded perspective view showing a case where a middle ring is provided between the separation preventing ring and the packing member. The intermediate ring 160 shown in Fig. (151) is removed.

That is, the intermediate ring 160 does not perform the departure prevention function, and prevents the packing member 130 from entering the pipe 5 only when the pipe 5 is inserted.

Therefore, it is preferable that the intermediate ring 160 is installed instead of the auxiliary separation prevention ring 150 when the flexible pipe 5 is used.

The inner diameter of the packing member 130 varies depending on the purpose of use and it is preferable to install the intermediate ring 160 only when the inner diameter of the packing member 130 is smaller than the outer diameter of the pipe 5 desirable.

At this time, when the inner diameter of the packing member 130 is smaller than the outer diameter of the pipe 5, the pipe 5 is hooked on the upper side of the packing member 130 when the pipe 5 is inserted. The packing member 130 is inserted when the pipe 5 is inserted. Therefore, the intermediate ring 160 may be installed only in this case.

When the pipe 5 is inserted less than 1/4 of the circular cross section of the packing member 130, the packing member 130 is inserted while the pipe 5 is inserted, May be omitted.

Hereinafter, the operation of the pipe connector 100 according to the present invention will be described.

First, the separation prevention ring 120 and the packing member 130 are sequentially inserted from the bottom side of the expansion part 113 of the connection body 110.

At this time, the support portion 122 of the separation prevention ring 120 is seated on the bottom of the expansion portion 113.

Thereafter, the fastening nut 140 is screwed to the threaded portion 114 of the connecting body 110. In this case, only the pipe 5 can be easily inserted without sufficiently tightening the fastening nut 140 completely. Done.

The pipe connector 100 assembled as described above is shown in FIG.

5, the operator inserts the pipe 5 into the pipe connection port 100. That is, the operator inserts the pipe 5 into the insertion portion 112 of the pipe connection port 100, 5, the pipe 5 sequentially passes through the inside of the packing member 130 and the release preventing ring 120.

At this time, since the pipe 5 passes through the separation preventing part 125 of the separation preventing ring 120 while passing through the separation preventing ring 120, (127) elastically contacts the outer peripheral surface of the pipe (5).

Thereafter, when the operator completely screws the tightening nut 140, the pressing portion 141 of the tightening nut 140 presses the packing member 130 to keep the airtightness, The toothed portion 127 of the departure prevention portion 125 of the pipe 120 comes into contact with the outer circumferential surface of the pipe 5 and is fixed in a state of being hooked so that the pipe 5 is not released.

The pipe fitting 100 of the tightening nut 140 is shown in FIG.

6 shows a state in which the tooth portion 127 of the departure prevention portion 125 digs into the outer circumferential surface of the pipe 5 due to a high temperature or a high pressure generated in the pipe 5. FIG.

Since the unevenness 142 formed at the lower end of the pressing portion 141 of the tightening nut 140 presses the upper surface of the packing member 130 when the screw tightening of the tightening nut 140 is completed, The tightening nut 140 is not easily released even in a severe environment.

When the pipe connector 100 is to be coupled to the connecting member 200 of an air conditioner or the like, it is preferable that before the pipe 5 is inserted into the ganged pipe connector 100, And the pipe 5 is inserted into the pipe connecting portion 100 after the screw portion 115a of the connecting member 200 is screwed to the threaded portion 201 of the connecting member 200 first.

100: pipe connector 5: pipe
110: connecting body 111: fluid passage
112: insertion portion 113: expansion tube
114, 115a, 201: threaded portion 116: packing member
120: release prevention ring 121: packing seat
122: Support part 125:
126: straight line part 127:
127a: Penetrating piece 128: Cutting part
130: packing member 140: tightening nut
141: pressing portion 142: concave / convex
150: Auxiliary breakaway prevention ring 160: Middle ring
200: connecting member 202:
203: Packing groove

Claims (9)

In the pipe connector for connecting the pipe (5),
A fluid passage 111 is formed to penetrate the fluid therein, and an end portion of the insertion portion 112 and the insertion portion 112 into which the pipe 5 is inserted are extended to one end of the fluid passage 111. Connecting body 110 formed with a tube 113,
A packing member 130 inserted into the expansion pipe 113 to seal between the pipe 5 and the expansion pipe 113;
A separation preventing part 125 which is installed between the packing member 130 and the bottom of the expansion part 113 and which is in contact with the outer circumferential surface of the pipe 5 and a packing seating part 121) for preventing separation of the pipe (5) and for supporting the packing member (130)
In addition to being screwed to the outer circumferential surface of the connecting body 110, the inner circumferential surface comprises a tightening nut 140 formed with a pressing portion 141 to press the packing member 130 in the expansion pipe 113 Pipe connector. The method of claim 1,
The anti-departure ring (120)
A packing seating part 121 formed in a flat plate shape for seating the packing member 130 and supporting the packing member 130,
A supporting part 122 formed on an outer circumferential surface of the packing seating part 121 and bent downward to be seated on the bottom of the expansion part 113,
A straight portion 126 formed on an inner circumferential surface of the packing seating portion 121 in a downward direction and facing the outer circumferential surface of the pipe 5 and a straight portion 126 formed on an end of the straight portion 126, (125) having a toothed portion (127) which is bent and comes into contact with or slits into the outer peripheral surface of the pipe (5). 3. The method of claim 2,
A plurality of cutouts 128 spaced from each other in the circumferential direction are formed in the separation preventing portion 125 so that the teeth 127 can be elastically moved toward the pipe 5, ) Is divided into a plurality of pipes. The method of claim 3, wherein
The cutout portion 128 is formed to cut from a specific point of the straight line portion 126 spaced apart from the packing seating portion 121 by a predetermined distance down to the end of the tooth portion 127, (127) and a portion of said straight portion (126) are resiliently moved. The method of claim 3, wherein
Wherein a plurality of pointed penetrating pieces (127a) are formed at ends of each of the teeth portions (127) divided by the cutout portion (128) so that the outer peripheral surface of the pipe (5) . The method of claim 1,
The lower end surface of the pressing portion 141 of the tightening nut 140 is provided with a concave and convex portion for pressing the plurality of points on the surface of the packing member 130 to prevent the tightening nut 140 from being loosened when the tightening nut 140 is screwed. (142) is formed on the upper surface of the pipe connector. The method of claim 1,
The packing member 130 prevents the packing member 130 from entering the pipe 5 when the pipe 5 is inserted between the separation preventing ring 120 and the packing member 130 in the pipe- And an auxiliary departure prevention ring 150 for assisting the pipe departure prevention function,
The auxiliary detachment prevention ring 150 is formed in the shape of a flat ring and has a plurality of detent pieces 151 formed on an inner circumferential surface of the detachment prevention ring 150 so as to be inclined downward toward the pipe 5 to contact or pierce the outer circumferential surface of the pipe 5 Wherein the pipe connector is a pipe connector. The method according to any one of claims 1 to 7,
A packing seating part 115 is formed in a stepped part with the fluid passage 111 in the opposite side end of the connecting body 110 on the side where the pipe 5 is inserted,
A packing member 116 is seated on the packing seating part 115,
The relative connecting member 200 is screwed to the inner peripheral surface of the packing seating portion 115,
Wherein the connecting member (200) is formed at one end thereof with an inclined surface portion (202) in surface contact with the packing member (116). The method of claim 8,
A packing groove 203 is formed on the outer peripheral surface of the connecting member 200,
The packing member 116 includes a head ring portion 116a which is filled between the packing seating portion 115 and the slope surface portion 202 so as to be in surface contact with each other and a head ring portion 116b extending downward from the head ring portion 116a, And a body ring portion (116b) formed to have a width smaller than the width of the packing receiving portion (116a) and being in surface contact with the packing receiving portion (115) and the packing groove (203).

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