JP2004332857A - Connection structure of line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock by providing a simple structure in a connection structure of a line in which a socket 1 having a flange part 12 is formed at one pipe end part, a rubber ring 3 is fitted to the other connection pipe (insert part) 2 and the connection pipe is inserted into the socket 1, and the flange part 12 is connected to a retaining ring 4 with bolts and nuts 5 and 6 so that the the rubber ring 3 can be pressed by the retaining ring 4 so as to secure sealability. <P>SOLUTION: A locking projection 21 is projectedly formed on the outer periphery of the connection pipe on the insert side (insert part 2). A cutout part allowing the projection 21 to pass therethrough is formed in the retaining ring 4 at a position where the cutout part is displaced from the locking projection when the bolt holes in the flange part and the retaining ring are aligned with each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
[Industrial applications]
The present invention relates to a pipe connection structure.
[0002]
[Prior art]
For example, various structures are known as connection means for the water supply pipe, but the most frequently used structure is a structure called a mechanical joint, and a flange portion is provided at one end of one pipe 01 as illustrated in FIG. A rubber ring (rubber seal) 05 is attached to the connection pipe 04, and the flange portion 02 and the pressing ring 06 are pressed so that the rubber ring 05 is pressed by the pressing ring 06. They are connected by bolts and nuts 07. Usually, the water supply pipe is often buried in the ground, and slippage in the pipe axis direction is prevented by friction between the pipe outer circumference and the ground, but when the pressure of the water supply becomes high, the connection is made. In some cases, this acts as a force pressing the pipe in the pipe axis direction, so that the connection portion comes off.
[0003]
As a countermeasure, a structure is provided in which a push screw 08 for fixing to the connection pipe 04 is provided on the push wheel 06.
[0004]
[Problems to be solved by the invention]
By the way, since the above-mentioned retaining structure requires a set screw, it is necessary to form a thick screwing portion of the set screw in the set ring, and a more than usual operation of the set screw operation is required. Further, after the fixing, the work of loosening or tightening the push screw again for fine adjustment of the pipe length of the connection pipe increases.
[0005]
Further, in the conventional pipe configuration, the connection pipe 04 is inserted to the back of the receiving port 03 and connected while keeping a constant interval accurately, and a problem such as water leakage from the connection point occurs after the completion of the pipe. At this time, it is difficult to repair by removing only the connection point, and the pipe itself is cut and removed, and then the repair pipe is installed, which is a very troublesome work.
[0006]
Therefore, the present invention proposes a pipeline connection structure provided with a novel retaining mechanism that can be retained by a simple operation.
[0007]
[Means to solve the problem]
The pipe connection structure according to the present invention is such that a receiving port provided with a flange portion at one pipe end, a rubber ring is attached to the connecting pipe and inserted into the receiving port, and the pressing ring presses the rubber ring. In the pipe connection structure for securing the water-tightness by connecting the flange portion and the press ring with a bolt and a nut, a locking protrusion is provided on the outer periphery of the connecting pipe at the insertion side, and the protrusion is provided on the press ring. The notch portion that passes is provided at a position where the notch portion and the locking projection are displaced when the bolt hole of the flange portion and the press ring are aligned.
[0008]
Therefore, when the locking projection passes through the notch, the pressing ring is positioned behind the locking projection, the rubber ring is attached to the connecting pipe and inserted into the receptacle, and the rubber ring is pressed and clamped between the pressing ring and the flange. By doing so, the water-tightness of the pipeline connection portion is ensured, and the locking projection collides with the pressing ring in the removal direction, so that the connection portion is prevented from coming off.
[0009]
In particular, when a recess for storing the locking projection is provided on the rubber ring contact surface adjacent to the notch (claim 2), the locking projection is stored in the recess, so that connection is made at a fixed margin. Will be.
[0010]
Further, in the pipe connection structure according to the present invention (claim 3), the inner peripheral surface of the receiving port is further formed to have an inner diameter into which the locking projection is inserted, and the inner diameter of the flange portion is made to coincide with the outer diameter of the connecting pipe. A notch through which the protrusion passes is provided in the inner peripheral portion of the flange portion at a position where the position of the bolt hole of the flange portion and the position of the bolt hole of the pressing ring are shifted, so that the locking protrusion portion is located in the receptacle. By doing so, the length of the margin can be arbitrarily set, and the retaining can be realized.
[0011]
Further, in the pipe connection structure according to the present invention (claim 5), a stand is attached to the push wheel, and a mark is provided at a predetermined position on the end face of the push wheel disc and the outer peripheral surface of the connection pipe.
[0012]
Therefore, the push ring is erected at a predetermined position, the connecting pipe is inserted into the receptacle through the push ring, and the connecting pipe is rotated by the mark, so that the connecting pipe provided with the branch section has a branch section. Can be connected in a predetermined direction.
[0013]
Embodiment
<First Embodiment> FIGS. 1 and 2 show a first embodiment of the present invention. In this embodiment, a piping member A having a receiving port 1 at one end and an insertion portion (insertion side of a connection pipe) 2 at the other end is connected, and is basically formed by a conventional mechanical joint. It has the same configuration as the pipe, and includes a rubber ring 3 serving as a packing other than the pipe member A, a pressing ring 4, a tightening bolt 5 and a nut 6.
[0014]
The receiving port 1 has the same structure as before, is provided with a receiving portion 11 having a large diameter so that the insertion portion 2 can be inserted, and a flange portion 12 is provided at an end of the receiving portion 11. Is provided with a predetermined bolt hole 13.
[0015]
The insertion portion 2 is formed by projecting locking projections 21 on the outer periphery of an appropriate distance (interchange margin) from the pipe end, and is provided at two or three positions at the same coordinate position in the pipe axis direction.
[0016]
The press ring 4 is provided with a bolt hole 41 at a position corresponding to the bolt hole 13 of the flange portion 12, and the notch 42 through which the locking projection 21 passes is aligned with the bolt holes 13, 41 on the inner peripheral surface. The notch 42 is provided at a position where the notch 42 and the locking projection 21 are displaced from each other. In addition, corresponding to the above-mentioned displacement, a storage recess 43 of the locking projection 21 is provided on the rubber ring contact surface side adjacent to the notch 42. The rubber ring 3, the tightening bolts 5 and the nuts 6 are as before.
[0017]
However, the connection of the pipeline is performed by inserting and inserting the insertion portion 2 of the pipe to be connected to the receptacle 1. Before insertion, the push ring 4 is inserted from the pipe end, and the locking projection 21 is inserted through the notch 41. The rubber ring 3 is attached from the insertion part 2 to the back, the insertion part of the insertion part is inserted into the receiving part 11, and the push ring 4 is rotated to an appropriate position to match the bolt holes 13, 41. Then, when the rubber ring 3 is pressed between the pressing ring 4 and the flange portion 12 by the bolts and nuts 5, 6, the rubber ring 3 is strongly pressed against the outer peripheral surface of the insertion portion 2, and the water sealing property of the pipe connection portion is reduced. Secured.
[0018]
Although the friction between the rubber ring 3 itself and the insertion portion 2 causes the insertion portion 2 to come off, the locking projection 21 collides with the pressing ring 4 to prevent movement in the removal direction, particularly in the above-described embodiment. Is made. Realize retaining. When the locking protrusion 21 is further housed in the concave portion 43, the position of the locking protrusion 21 and the relative position of the flange portion 12 are determined, whereby the rotational position of the inserted portion 2 in the outer peripheral direction after connection is also determined. When the branch portion is incorporated in the member A, the branch portion direction can be easily determined in the design direction. Further, the length of the cut-in portion coincides with the design position, and the protrusion 21 is prevented from biting into the rubber ring 3, and uneven pressing of the rubber ring 3 does not occur.
[0019]
<Second Embodiment> Figs. 3 and 4 show a second embodiment of the present invention, in which the configuration of the receptacle 1a is further changed in the first embodiment.
[0020]
The receiving port 1a is formed such that the inner peripheral surface of the receiving portion 11a has an inner diameter into which the locking projection 21 is inserted and a length which can correspond to a sufficient insertion length, and the inner diameter of the flange portion 12 is adjusted to the insertion portion 2. The notch 14 through which the protrusion 21 passes through the inner peripheral portion of the flange portion 12 is aligned with the outer diameter, and the notch 14 and the locking protrusion 21 are shifted when the bolt holes 13 and 41 are aligned. It is provided.
[0021]
Thus, when the locking projection 21 of the insertion portion 2 is positioned behind the flange portion 12 through the notch 14, the pipe connection is established at a fixed connection interval determined by the formation position of the locking projection 21. Along with the realization, the rubber ring 3 is pressed between the flange portion 12 and the pressing ring 4 to realize the water sealing property (FIG. 4A: first standard position).
[0022]
Further, similarly to the first embodiment, the locking projection 21 may be positioned behind the pressing ring 4 so as to establish a pipe connection that secures water-tightness (FIG. 4B: second standard position).
[0023]
In this way, by connecting the pipelines at the first standard position and the second standard position, it is possible to easily form the pipeline of the design length, and to adjust the connection between the final end of the pipeline and the equipment. Can be realized by adjusting the margin of the members at the final end of the conduit or near the final end.
[0024]
Further, in the second embodiment, if a leak occurs during the water flow test after the completion of the pipeline connection work, the insertion portion 2 at the connection point is pushed into the depth of the receiving port 1a and shifted laterally. When the rubber ring 3 is pulled out, the replacement of the rubber ring 3 can be easily performed, and the reconnection work can be easily performed.
[0025]
<Third Embodiment> FIG. 5 shows a third embodiment of the present invention in which a push wheel 4a provided with a stand portion 44 is employed, and a mark 45 is provided on the end surface of the push wheel disk. The mark 22 is also provided at the second predetermined position. Note that the stand portion 44 may have any structure as long as the push ring main body can be installed at a predetermined position.
[0026]
The push wheel 4a with the stand is installed such that the bolt hole 13 and the notch portion 14 of the socket 1a to be connected coincide with the bolt hole 41 and the notch portion 42 of the push wheel 4a, and pushes the insertion portion 2 at a stroke. When the insertion is made into the wheel 4a and the receiving portion 11a, the insertion portion 2 is rotated so that the mark 22 is aligned with the mark 45, and the bolts and nuts 5, 6 are tightened in this state to connect the pipeline, the member A In the case where the branching portion is incorporated in the vehicle, if the marks 22 and 45 are provided corresponding to the branching portion direction, the branching direction naturally follows the design direction, and the workability is improved.
[0027]
Furthermore, when the push wheel 4a with the stand is used for indoor piping or outdoor exposed piping, the pipe layout is fixed by fixing the push wheel 4a to the ceiling or wall surface of a building or a concrete-punched installation surface in advance. It can be set in advance, and the pipeline formation work can be performed efficiently.
[0028]
【The invention's effect】
As described above, according to the present invention, in a pipeline configuration using a general mechanical joint, a locking projection is provided on the outer periphery of the insertion side of the connection pipe, and the notch through which the projection passes through the pressing ring is formed by a flange portion and When the bolt holes of the push ring are aligned with each other, the pipe connection structure is provided at the position where the notch and the locking projection are displaced. The locking projection is locked by the locking projection passing through the notch. If it is located behind the projection and the pipeline connection is made as before, the above-mentioned very simple configuration can reliably prevent the connection portion from coming off.
[Brief description of the drawings]
FIG. 1 is a perspective view of members (insertion portion and push ring) according to a first embodiment of the present invention.
FIG. 2 is a sectional view after the connection.
FIG. 3 is a perspective view of a member (receiving port) of the second embodiment.
4A and 4B are cross-sectional views after the connection, wherein FIG. 4A shows connection at a first standard position, FIG. 4B shows connection at a second standard position, and FIG. 4C shows connection at a free position.
FIG. 5 is a perspective view of a member (push ring) of the third embodiment.
FIG. 6 is a sectional view of a conventional connection portion.
[Explanation of symbols]
1, 1a Receiving port 11, 11a Receiving part 12 Flange part 13 Bolt hole 14 Notch part 2 Insertion part 21 Locking projection 22 Mark 3 Rubber ring 4, 4a Push ring 41 Bolt hole 42 Notch part 43 Storage recess 44 Stand part 45 Mark 5 bolts 6 nuts

Claims (5)

Form a socket with a flange at one end of the pipe, attach a rubber ring to the other connecting pipe, insert it into the socket, and connect the flange and the push ring with the bolt and nut so that the rubber ring is pressed by the push ring. In the connection structure of the pipe line which secures the water-tightness by connecting with each other, a locking projection is provided on the outer periphery of the insertion side of the connection pipe, and a notch portion through which the projection passes through the pressing ring, a flange portion and A pipe connection structure characterized by being provided at a position where a notch and a locking projection are displaced when bolt holes of a press ring are aligned with each other. 2. The pipeline connection structure according to claim 1, wherein a recess for accommodating the locking projection is provided on the rubber ring contact surface adjacent to the notch. The inner peripheral surface of the receiving port is formed to have an inner diameter into which the locking projection is inserted, and the inner diameter of the flange portion is made to coincide with the outer diameter of the connection pipe. 2. The pipe connection structure according to claim 1, wherein said bolt holes are provided at positions where said bolt holes are displaced from said bolt holes. 4. The pipe connection structure according to claim 3, wherein the receiving port is formed to have an appropriate depth so that the portion where the locking projection is formed can be positioned deep inside the flange portion. The connection structure for a pipeline according to any one of claims 1 to 4, wherein a stand is attached to the push wheel, and a mark is provided at a predetermined position on an end surface of the push wheel disc and an outer peripheral surface of the connection pipe.

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