JPH1096497A - Flare connector sealing device - Google Patents

Abstract

(57) [Problem] To provide a seal device that can easily and surely close an open end of a flare connector connected to a distal end portion of a tube. SOLUTION: A flare nut 2 and a hemispherical seal cap 3 are used for closing an open end of a flare connecting device 1, for example. The flare nut 2 has a through hole 10 coaxial with the through hole 4 of the flare connector 1 and a sealing surface 9 facing the sealing surface 5.
And a screw portion 8 corresponding to the screw portion 6 and an annular concave portion 11 formed at the back of the screw portion 8. The seal cap 3 has a flange 12 whose both surfaces are in close contact with the respective sealing surfaces 5 and 9 of the flare connector 1 and the flare nut 2. This flange 12
A plurality of locking pieces are formed around the flare nut, and the flare nut 2 is attached to the flare connection tool 1 with the locking pieces anchored in the annular concave portion 11 on the flare nut 2 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for closing an open end of a flare connector used for a terminal such as a refrigerant pipe of an air conditioner.

[0002]

2. Description of the Related Art Conventionally, as a sealing device for a flare connecting device of this kind, a hemispherical seal cap 3 as shown in FIG. 1 is interposed between the flare connecting device 1 and a flare nut 3, or As shown in FIG.
The first insertion portion 13 which is formed to have a slightly smaller diameter than the inner diameter of the through hole 4 and the inner diameter of the first insertion portion 13 inserted into the through hole 4 and the inner diameter of the through hole 10 of the flare nut 2 is slightly smaller than the inner diameter of the through hole 10. The second insertion portion 14 to be inserted and the outer periphery between the first and second insertion portions are extended from both sides thereof, and both surfaces thereof are connected to the flare connector 1.
A seal cap 3A comprising a flange 17 which is brought into close contact with the sealing surfaces 5 and 9 of the flare nut 2 is interposed between the flare connector 1 and the flare nut 2 to close the open end of the flare connector 1. Met.

[0003]

When a seal cap 3 as shown in FIG. 1 is used, since the seal cap 3 is hemispherical, it can easily move in the flare nut 2 and its posture is not stable. There is a possibility that the seal cannot be properly attached and the seal cannot be made properly, or the seal cap 3 may fall off from the flare nut 2 depending on the attachment direction.
There was a problem that workability was poor. In addition, even if the seal cap 3A is configured as shown in FIG. 2, depending on the mounting direction, the seal cap 3A may fall off as in the case of the hemispherical seal cap 3. Therefore, in the present invention,
An object of the present invention is to provide a seal device for a flare connector that can be easily used regardless of a posture at the time of assembly.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a sealing surface formed on the periphery of an opening on one side of a through hole and a threaded portion formed on the outer periphery. A flare connecting device configured to connect a pipe to the opening on the other side, and a screw portion corresponding to a screw portion of the flare connecting device formed on an inner peripheral surface; Forming a seal surface facing the seal surface of, and a flare nut formed at the tip with a through hole coaxial with the through hole of the flare connector, interposed between the flare connector and flare nut, A seal cap for closing the through hole of the flare connector, wherein a plurality of locking pieces are formed around the flange of the seal cap, and the locking pieces are formed at the back of the thread portion of the flare nut. Annular concave I decided to attach the flare nut to the flare fitting in the state of being anchored to.

[0005] The seal cap has a flange provided with the locking piece, and has a semi-spherical center, or has a diameter slightly smaller than the inner diameter of the through hole of the flare connector. A first insertion portion to be inserted into the through hole, a second insertion portion formed to have a diameter slightly smaller than the inner diameter of the through hole of the flare nut, and inserted into the through hole;
A flange extending from the outer periphery between the first and second insertion portions and having both surfaces closely contacting the respective sealing surfaces of the flare connection tool and the flare nut; 2 is formed at the boundary of the insertion portion, and is formed of a blocking wall that closes a through hole of the flare connector, and the locking piece is formed around the flange, all of which are made of synthetic resin. .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a sealing device for a flare connector according to the present invention, a plurality of locking pieces are formed around a flange of a seal cap constituting the sealing device, and a seal cap provided with the locking pieces is provided. Insert into the flare nut,
Also, after the locking piece is anchored in the annular concave part formed in the back of the thread part of the flare nut, the flare nut is attached to the flare connection device, so the seal cap is greatly inclined inside the flare nut. It can be prevented from coming off from the flare nut and the open end of the flare connector can be reliably closed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an example of a flare connector and a sealing device therefor, 1 is a flare connector, 2 is a flare nut, 3 is a seal cap made of a synthetic resin material interposed between the flare connector 1 and the flare nut 2. It is. The flare connector 1 has a sealing surface 5 on the periphery of one side opening of the through hole 4.
However, a screw portion 6 is formed on the outer periphery, and the tube 7 is inserted into the opening on the other side and welded. On the other hand, the flare nut 2 has a flare connector 1 on its inner peripheral surface.
A threaded portion 8 corresponding to the threaded portion 6, a sealing surface 9 facing the sealing surface 5 of the flare connector 1, and a through hole 10 coaxial with the through hole 4 of the flare connector 1. An annular concave portion (threaded escape portion) 11 is formed at the back of the head.

[0008] As shown in FIG.
FIG. 2 shows a flange having a central portion projecting in a hemispherical shape, and a flange 12 extending from the periphery thereof so that both surfaces are in close contact with the sealing surface 5 of the flare connecting device 1 and the sealing surface 9 of the flare nut 2, respectively. As shown, a first insertion portion 13 formed to be insertable into the through hole 4 of the flare connector 1 and a second insertion portion 14 formed to be inserted into the through hole 10 of the flare nut 2.
And the first insertion portion so that both surfaces thereof are in close contact with the sealing surface 5 of the flare connecting device 1 and the sealing surface 9 of the flare nut 2, respectively.
Flange 15 extended from the outer periphery between 13 and second insertion portion 14
And (3A) having a blocking wall 16 for closing the through hole 4 of the flare connector 1 at the boundary between the first insertion portion 12 and the second insertion portion 14. Now, these flanges
A plurality of locking pieces 17 as shown in FIG. 3 are formed around the parts 12 and 15, and the locking pieces 17 are moored in an annular concave portion 11 formed inside the flare nut 2 as shown in FIG. By attaching the flare nut 2 to the flare connector 1 in this state, the opening end on the flare connector 1 side is closed.

Although the flare cap 3 shown in FIG. 1 has a complete hemisphere at the center, it is not limited to this. For example, if the flare cap 3 is formed in a protruding shape as shown in FIG. 2, when inserted into
Since the gap between 10 and the outer periphery of the seal cap 3B is reduced, the inclination of the seal cap 3B in the flare nut 2 can be further reduced.

[0010]

According to the sealing device for the flare connecting device as described above, the locking piece formed around the flange of the seal cap constituting the sealing device is formed into an annular shape formed inside the flare nut. After mooring in the recess of the flare nut, the flare nut is attached to the flare fitting, so there is no problem that the seal cap is greatly inclined inside the flare nut or falls off the flare nut, It can be easily mounted on the device and can be securely closed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of a flare connector and a sealing device thereof according to the present invention and a conventional example.

FIG. 2 is a configuration diagram showing another example of a flare connector and a sealing device thereof according to the present invention and a conventional example.

3A and 3B are front views of a seal cap showing an embodiment of the present invention, wherein FIG. 3A is a hemispherical shape of FIG. 1 and FIG. 3B is a view corresponding to the through hole of the flare connecting device and the flare nut of FIG. It has two insertion portions.

FIG. 4 is a sectional view showing an assembled state of the seal cap and the flare nut of the present invention.

FIG. 5 is a side view of another seal cap of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flare connection tool 2 Flare nut 3 Seal cap 3A seal cap 3B seal cap 4 Through hole 5 Seal surface 6 Screw part 7 Pipe (pipe) 8 Thread part 9 Seal surface 10 Through hole 11 Annular concave part (screw relief part) 12 Flange 13 First insertion part 14 Second insertion part 15 Flange 16 Blocking wall 17 Locking piece

Claims (4)

[Claims] 1. A flare connecting device which has a sealing surface formed on the periphery of one opening of a through hole, a threaded portion formed on the outer periphery, and a pipe connected to the opening on the other side. A screw portion corresponding to the screw portion of the flare connection device is formed on the peripheral surface, a seal surface facing the seal surface of the flare connection device is formed at the back of the screw portion, and a penetration of the flare connection device is formed at the tip. A flare nut formed with a through-hole coaxial with the hole, and a seal cap interposed between the flare connector and the flare nut to close the through-hole of the flare connector, wherein the seal cap A seal for a flare connector, wherein a plurality of locking pieces are formed around a flange, and the locking pieces are anchored in an annular concave portion formed inside a thread portion of the flare nut. apparatus. 2. The method according to claim 2, wherein the seal cap has a hemispherical head.
The sealing device for a flare connector according to claim 1, comprising a flange having the locking piece. 3. The flare connection device according to claim 2, wherein the seal cap is formed to have a diameter slightly smaller than an inner diameter of a through hole of the flare connection tool, and a first insertion portion inserted into the through hole; A second insertion portion formed into a small diameter and inserted into the through hole, and extending from an outer periphery between the first and second insertion portions, and both surfaces of each of the flare connector and the flare nut A flange formed to be in close contact with the sealing surface, and a blocking wall formed at a boundary between the first insertion portion and the second insertion portion and closing a through hole of the flare connection device. The sealing device for a flare connector according to claim 1, wherein the locking piece is formed. 4. The sealing device for a flare connector according to claim 1, wherein the seal cap is made of a synthetic resin.