JP2597191Y2 - Insertion connection pipe device - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application] The present invention is applied to the existing pipe.
A joint for fixing one end of the inner tube to the existing tube in an airtight manner.
Insertion with one end inserted into the end of the existing pipe with hand
The tube relates interpolation connecting tube apparatus among which connects to the existing pipe, and more particularly, to forming the joint, the interpolation freely cylindrical joint body provided to the existing pipe, fitted to the fitting body In this state, a lock ring for preventing locking and a resilient seal ring that can be tightly attached to the inner surface of the existing pipe and a ring tightening nut that can be screwed into the joint body are inserted into the joint body. The lock ring and the seal ring are arranged in order from the distal end side to the proximal end side, and the lock ring and the seal ring are enlarged in diameter with a screwing operation of the ring tightening nut for pushing and moving the lock ring and the seal ring toward the insertion distal end side. The present invention relates to an insertion connecting pipe device in which a tapered surface which is pressed against an inner surface of the existing pipe is formed on an outer peripheral portion of the joint body.

[0002]

2. Description of the Related Art FIG.
As shown in FIG. 4 and FIG. 4, a flexible insertion tube 2 having one end inserted into the end of the existing tube 1 is integrally connected to the joint body 3, and a ring tightening nut 4 separate from these.
Is externally screwed into a male screw portion 3a formed on a part of the outer peripheral surface of the joint main body 3. By the way, the lock nut 4 and the elastic seal ring 6 (the elastic seal ring 6 is specifically O-ring 6A and fireproof packing 6
B) is pushed back to the insertion distal end side of the intubation tube 2. Further, in a state where the lock ring 5 and the seal ring 6 are pushed to the insertion distal end side by the ring tightening nut 4, the diameter of the lock ring 5 and the seal ring 6 is increased and the taper is pressed to the inner surface of the existing pipe 1. A surface 3b is formed on the outer peripheral portion of the joint main body 3. The screwing operation of the ring tightening nut 4 is performed by using a nut rotation operation jig 7 (see FIG. 4) inserted into a gap between the existing pipe 1 and the inner insertion pipe 2. . As the ring tightening nut 4 is screwed, the lock ring 5 and the elastic seal ring 6 are pressed against the inner surface of the existing pipe 1, and the lock ring 5 is pressed against the existing pipe 1 based on the pressing.
After the locking of the elastic seal ring 6 and the close contact of the elastic seal ring 6 with the existing pipe 1 are performed, the jig 7 for rotating the nut is pulled out. Resin 8 was to be injected.

[0003]

However, in the above-described conventional insertion connection pipe device, a gap for inserting the nut rotation operation jig 7 is formed between the existing pipe 1 and the insertion pipe 2. Therefore, there is a problem that the diameter of the intubation tube 2 is reduced by an amount corresponding to the space for forming the gap, and a large pressure loss occurs in that portion. The present invention has been made in view of such a situation, and an object of the invention is to provide an insertion connection device capable of solving the above-described problem of pressure loss.

[0004]

SUMMARY OF THE INVENTION The characteristic features of the insertion connecting tube device according to the present invention include an insertion tube whose one end can be freely inserted into an end of an existing tube, and an insertion tube inserted into the existing tube. A joint that fixes one end to the existing pipe in an airtight manner, and to form the joint, a tubular joint main body that can be inserted into the existing pipe is provided, and the fitting is externally fitted to the joint main body. A lock ring for retaining and a resilient seal ring that can be freely locked to the inner surface of the existing pipe, and a ring tightening nut that can be screwed into and out of the joint body. From the base to the proximal end side, the lock ring and the seal ring are enlarged by the screwing operation of the ring tightening nut for pushing and moving the lock ring and the seal ring to the insertion distal end side. Tapered surface that presses against the inner surface of the existing pipe , The joint a interpolation connection tube device that is formed on the outer peripheral portion of the body, as well as integrally formed with said intubation and the ring tightening nut, the ring Shimezukena
The screw is free to screw into the male thread of the joint body.
The formed female screw portion is provided on an inner peripheral portion of the joint body.
And the tip of a rod-shaped jig that can prevent rotation around its axis.
To prevent co-rotation by forming a male screw part that can be screwed into the inside
Constitute the operation unit lies in that is configured to prevent the co-rotation of the joint body and the ring tightening nut.

[0005]

According to the present invention, a ring tightening nut and an insertion tube are integrally formed, and an inner periphery of the joint body is provided with a co-rotation preventing operation portion constructed as described above. since it is, using the co-rotation prevention operation portion, wherein
The male screw part at the tip of the rod-shaped jig is connected to the female part of the joint body.
By screwing into the screw part, the ring tightening nut
When the screw is screwed into the joint body,
Formed on the external thread of the rod-shaped jig and the inner periphery of the joint body
Torque is applied in the tightening direction.
Co-rotation of the ring tightening nut and the joint body.
Co-rotation of the joint body with the rod jig
When rotating the proximal end of the insertion tube integral with the ring tightening nut while preventing the ring tightening nut and the joint body from rotating together, the ring tightening nut on the distal end side can be prevented. The joint is rotated with respect to the joint body . Therefore, intubation, which was necessary in the conventional device,
Nut rotation operation jig fitted around is unnecessary, inserting the nut rotating operation jig between the inner intubation and the existing pipe
It is not necessary to form a jig insertion gap for this.

[0006]

[Effect of the invention] Therefore, according to the present invention, only the space component for the formation of which has been conventionally required the jig insertion gap prevents that the diameter of the inner intubation is reduced, the teeth
It is only necessary to screw a female screw part on the joint body.
Therefore, without particularly reducing the inner diameter of the inner peripheral portion,
The conventional problem that a large pressure loss occurs in the joint body is solved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions.

As shown in FIGS. 1 and 2, the insertion pipe connecting device according to the present invention is a flexible insertion pipe 2 having one end inserted into an end of an existing pipe 1 and inserted into the existing pipe 1. And a joint A for fixing one end (insertion tip) of the inner tube 2 to the existing tube 1 in an airtight manner.

[0009] The joint A is specifically configured as follows. That is, the joint A has, as its main part, a tubular joint body 3 that can be inserted into the existing pipe 1 and engages with the inner surface of the existing pipe 1 in a state of being externally fitted to the joint body 3. It has a locking ring 5 that can be stopped and a resilient seal ring 6 that can be in close contact. The lock ring 5 is specifically formed of a single annular body having a saw-tooth cross-section locking portion 5a formed over the entire outer peripheral surface thereof and having a diameter that can be freely increased. Further, the elastic seal ring 6 is specifically composed of a combination of one refractory packing 6B and three rubber O-rings 6A. Then, the above-described lock ring 5 and elastic seal ring 6
(That is, the refractory packing 6B and the O-ring 6A), and
Part of the outer peripheral surface of the joint body 3 (in this embodiment,
Ring fastening nuts 4 which can be externally screwed into the external thread portion 3a formed on the (proximal end portion) are arranged in order from the insertion distal end side of the joint body 3 toward the proximal end side. Further, the diameter of the lock ring 5 and the seal ring 6 is increased with the screwing operation of the ring tightening nut 4 for pushing and moving the lock ring 5 and the seal ring 6 toward the insertion distal end, and the existing pipe 1 is moved.
The tapered surface 3b pressed against the inner surface of the joint body 3
Is formed on a part of the outer peripheral portion (in the present embodiment, the tip side portion).

As described above, in the insertion connection device of the present invention including the insertion tube 2 and the joint A, the base end of the ring tightening nut 4 and the distal end of the insertion tube 2 are further connected. In addition, the both 4 and 2 are integrally formed, and a co-rotation preventing operation portion B for preventing co-rotation between the ring tightening nut 4 and the joint body 3 is provided on an inner peripheral portion of the joint body 3. I have. Specifically, the co-rotation preventing operation part B includes a female screw part 3 d formed in a reverse thread to a male screw part 3 a formed in a part of the outer peripheral surface of the joint body 3. Is formed on the inner peripheral surface of the. In this embodiment, the female screw portion 3d is formed only on the base end portion of the inner peripheral surface of the joint main body 3, but is formed only on the distal end portion of the inner peripheral surface of the joint main body 3. Alternatively, it may be formed over the entire length of the inner peripheral surface of the joint main body 3.

In the insertion pipe connecting device of the present invention having such a configuration, the ring tightening nut 4 and the insertion pipe 2 are integrally formed, and the above-mentioned co-rotation preventing operation section is provided on the inner peripheral portion of the joint body 3. B, the co-rotation prevention operation unit B
To prevent the ring tightening nut 4 and the joint body 3 from rotating together (that is, a rod-shaped jig 9 having a male screw part at its tip end capable of screwing with the female screw part 3d of the joint body 3). Is inserted into the interior of the intubation tube 2, and the male screw portion at the tip of the jig is screwed and fixed to the female screw portion 3 d to prevent the co-rotation), and is integrated with the ring tightening nut 4. When the proximal end portion of the inner tube 2 is gripped and rotated, the ring tightening nut 4 on the distal end side is rotated. Therefore, the jig 7 for rotating the nut, which is necessary in the conventional apparatus,
(See FIG. 4) becomes unnecessary, and it becomes unnecessary to form a jig insertion gap for inserting the jig 7 between the existing tube 1 and the inner tube 2. As a result, the diameter of the intubation tube is not reduced by the space for forming the gap for inserting the jig 7, and the conventional problem that a large pressure loss occurs in that portion is solved. . For example, in contrast to the existing tube 1 having an inner diameter of 27.6 mm, only the insertion tube 2 having an inner diameter of 15 mm was conventionally connectable (diameter reduction ratio: 45%). .
It became possible to connect the 8 mm intubation tube 2 (diameter reduction ratio: 25%) (pressure loss was reduced to about 1/5 of the conventional one).

A slight gap between the existing pipe 1 and the inner pipe 2 is filled with a fire-resistant resin 8 as shown in FIG.

In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a connection state of an insertion connection pipe device according to the present invention.

FIG. 2 is a sectional view showing the connection process.

FIG. 3 is a cross-sectional view showing a connection state of a conventional insertion connection tube device.

FIG. 4 is a sectional view showing the connection process.

[Explanation of symbols]

1 in an existing pipe 2 intubation 3 fitting body 3a male threaded portion 3 b tapered surface 3d female threaded portion 4 ring tightening nut 5 locking ring 6 the sealing ring 9 the rod-shaped jig A joint B both around prevention operation portion

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Chiaki Tsutsumi 2nd Daifuku, Kuwana-shi, Mie Hitachi Metals Co., Ltd. Kuwana Plant (56) References Japanese Utility Model 1-76325 (JP, U) Japanese Utility Model 5-22979 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F16L 21/00-25/02

Claims (1)

(57) [Scope of request for utility model registration] 1. An insertion tube (2), one end of which can be freely inserted into an end of an existing tube (1), and one end of the insertion tube (2) inserted into the existing tube (1) in an airtight manner. A joint (A) fixed to the existing pipe (1), and a tubular joint main body (3) that can be inserted into the existing pipe (1) to form the joint (A); A lock ring (5) for preventing locking and a resilient seal ring (6) that can be locked to the inner surface of the existing pipe (1) in an externally fitted state to the joint body (3); (3) and a ring tightening nut (4) which can be externally screwed into the joint body (3) are arranged in order from the insertion distal end side to the proximal end side of the joint body (3), and the lock ring (5) and the seal With the screwing operation of the ring tightening nut (4) that pushes the ring (6) toward the insertion distal end, the lock ring (5) and Serial seal ring said existing pipe (6) is expanded to be (1)
An inner connecting pipe device in which a tapered surface (3b) for pressing against an inner surface of the inner pipe is formed on an outer peripheral portion of the joint body (3), wherein the ring tightening nut (4) and the inner pipe (2) are provided. One
The joint body is formed into a body and the ring tightening nut (4) can be screwed into the joint body.
A female screw formed in a reverse screw with the male screw part (3a) of (3)
A joint (3d) is provided on an inner peripheral portion of the joint body (3).
Of the rod-shaped jig (9),
A co-rotating screw with a male screw part at the tip that can be screwed in
Ri prevention operation unit constitutes a (B), so as to prevent co-rotation of the ring tightening the fitting body and the nut (4) (3)
The connecting and connecting pipe device configured as described above .