JP2007017005A - Adapter for piping connection, and method of connecting temporary piping to aseismatic joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attach and detach temporary piping easily in a short time to and from a socket pipe part of an aseismatic joint. <P>SOLUTION: This adapter 1 for piping connection comprises a flange 2 larger in diameter than the socket pipe part 20 of the aseismatic joint; an insertion cylinder 3 provided at one face of the flange 2 so as to be pressed into the socket pipe part 20 and having such a length that the distal end does not reach a lock ring 25; a connecting pipe 4 provided at the other face of the flange 2 and communicating with the inside of the insertion cylinder 3 to connect a temporary distributing pipe; and a receiving ring 9 and a bolt 10 for fixing the flange 2 in the pressed state to the socket pipe part 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides a pipe connection adapter used for connecting a temporary pipe to a pipe that employs an earthquake-resistant joint that inserts and inserts an insertion pipe part into a receiving pipe part, and uses the pipe connection adapter for earthquake resistance. The present invention relates to a method for connecting a temporary pipe to a joint.

  In pipes such as water pipes and gas pipes, earthquake-resistant joints that are devised so that they do not easily disengage even when an external force is applied due to an earthquake or the like are often used. This is a structure called NS type or S type, and is composed of a widened receiving pipe part and an insertion pipe part inserted into the receiving pipe part, on the inner peripheral surface of the receiving pipe part. A seal member is attached to the recessed annular groove, and a lock ring is attached to the inner peripheral side of the seal member on the back side, while the lock ring is inserted into the receiving pipe part at the outer periphery of the distal end of the insertion pipe part. It is the structure which provided the annular protrusion located in the back | inner side around (refer patent document 1, FIG. 8). The engagement between the lock ring and the annular protrusion restricts the movement of the insertion tube portion in the detaching direction, and the integrity of the receiving tube portion and the insertion tube portion is enhanced.

JP 2001-317659 A

By the way, for example, when replacing the distribution pipe, as shown in FIG. 1, the distribution pipe C, which is laid between the distribution pipes A and B and connected to the water supply pipe 31 to the residential land, etc., includes the valves V1 and V2. In the case of replacement, the valves V1 and V2 are first installed and the temporary water distribution pipe 30 is connected between both valves so that the water will not be shut off for a long time during the construction, and the water supply pipe is connected to the temporary water distribution pipe 30. 31 is connected, and water supply pipe C is exchanged after securing water supply to residential land or the like.
However, if a well-known soft seal valve provided with both ends of the above-mentioned seismic joint receiving pipes is adopted as the valves V1, V2, a temporary water distribution pipe 30 provided with an insertion pipe corresponding to this is connected. However, since the insertion tube portion cannot be easily removed by the engagement between the lock ring and the annular protrusion, the insertion tube portion is attached or detached using a tube detaching device as disclosed in Patent Document 1, or Alternatively, it is necessary to connect a partially cut pipe as a temporary water distribution pipe and lay it from the tip. Therefore, it takes time and labor for the work related to the replacement of the cloth, and the work efficiency is deteriorated. In addition, a space for installing the pipe attaching / detaching device on the earthquake-resistant joint and a space for installing the cut pipe as a temporary water distribution pipe are secured. As a result, the work pit becomes larger, which leads to expansion of the construction range.

  Accordingly, the present invention provides a pipe connection adapter and a seismic joint that enable temporary piping to be easily attached to and detached from the receiving pipe portion of the seismic joint in a short time, thereby improving work efficiency and saving work pits. It is an object of the present invention to provide a method for connecting a temporary pipe to a pipe.

In order to achieve the above-mentioned object, the invention according to claim 1 is for connecting a temporary pipe to a receiving pipe portion of an earthquake-resistant joint having a lock ring for locking an end of an insertion pipe portion on an inner peripheral surface. An adapter for pipe connection that is provided on a flange having a diameter larger than that of the receiving pipe part and on one surface of the flange, can be press-fitted into the receiving pipe part, and the tip does not reach the lock ring. An insertion tube having a thickness, a connection portion provided on the other surface of the flange and connected to the inside of the insertion tube and capable of connecting a temporary pipe, and a fixing means for fixing the flange in a pressed state to the receiving tube portion It is characterized by comprising.
According to a second aspect of the present invention, in addition to the object of the first aspect, in order to fix the flange easily and reliably, the fixing means is a bolt connected to the receiving ring and the flange mounted on the outer periphery of the receiving pipe portion. It is set as the structure connected by.
In addition to the object of the first or second aspect, the invention described in claim 3 effectively prevents the mixing of air, mud, etc. when the temporary pipe is attached and detached, and the cleaning of the pipe such as the discharge of red water from the existing distribution pipe. For this purpose, the connecting portion is provided at a position eccentric from the center of the insertion tube so that the inner diameter portion thereof is in contact with the inner periphery of the insertion tube.

  In order to achieve the above object, an invention according to claim 4 is a method of connecting a temporary pipe to a seismic joint, and the seismic joint includes a lock ring for locking the distal end of the insertion pipe portion on the inner peripheral surface. The pipe connection adapter insertion tube according to any one of claims 1 to 3 is inserted into the receiving pipe section, and the flange of the pipe connection adapter is fixed to the receiving pipe section by a fixing means. Temporary piping is connected to the connection portion of the connection adapter.

According to the inventions of claims 1 and 4, since the pipe connection adapter can be easily attached to and detached from the receiving pipe portion in a short time, the temporary pipe can be easily installed without using a pipe detaching device, Work efficiency is improved. In addition, since the work pit is also space-saving, the construction section can be minimized and the construction period can be shortened.
According to invention of Claim 2, in addition to the effect of Claim 1, a flange can be fixed easily and reliably using the shape of a receiving pipe part.
According to the third aspect of the invention, in addition to the effect of the first or second aspect, if the pipe connection adapter is connected so that the connection portion is on the upper side of the plug-in cylinder, the connection can be made even if air is mixed. It can be easily eliminated on the part side, and mixing of mud and the like can be prevented. On the contrary, if the pipe connection adapter is connected so that the connection portion is on the lower side of the plug-in tube, it is possible to easily clean the pipe such as discharge of red water from the existing distribution pipe.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 2 is an explanatory view showing an example of a pipe connection adapter (hereinafter simply referred to as “adapter”) according to the present invention. The adapter 1 has a plug cylinder 3 protruding concentrically on one surface of a circular flange 2. On the other surface, a connecting pipe 4 is provided as a connecting portion provided with a manual opening / closing valve 5 and communicating with the inside of the insertion tube 3. The connecting pipe 4 is provided at a position eccentric from the center of the plug-in cylinder 3 so that the inner diameter portion thereof is in contact with the inner periphery of the plug-in cylinder 3.
Further, near the outer periphery of the flange 2, four screw holes 6, 6... Are arranged at equal intervals in the circumferential direction, and two screw holes 7, 7 are formed at point symmetric positions on the inner side. Yes.

FIG. 3 shows a state in which the adapter 1 is connected to the receiving pipe portion 20 of the soft seal valve. The receiving pipe portion 20 has a rubber ring 22 accommodated in an annular groove 21 recessed in the inner periphery. The rubber ring 22 has a well-known NS shape in which a rubber ring 24 and a lock ring 25 are accommodated in a second annular groove 23 recessed in the back side. When the insertion tube portion is inserted here, the protrusion provided on the outer periphery of the distal end of the insertion tube portion is engaged with the lock ring 25 and attached to prevent the removal.
Here, the insertion tube 3 of the adapter 1 has an outer diameter that is press-fitted into the rubber ring 22 of the receiving pipe part 20, but the length of the insertion tube 3 exceeds the rubber ring 22 in the connected state. The length does not reach the lock ring 25. Further, a chamfered portion 8 is formed on the outer periphery of the tip in order to reduce interference with the rubber ring 22 during press-fitting.

  9 is a receiving ring that is combined with a bolt by combining a pair of halves. The receiving ring 9 is assembled at the position of a constricted portion 26 recessed in the outer periphery of the receiving pipe portion 20 and penetrates at equal intervals in the circumferential direction. By screwing the four bolts 10, 10, etc., into the screw holes 6 provided in the flange 2, the flange 2 of the adapter 1 is pressed against the end of the receiving pipe part 20 and fixed to the receiving pipe part 20. It becomes possible. The receiving ring 9 and the bolt 10 serve as a fixing means for the flange 2 and can receive a water stop pressure applied to the adapter 1.

  In the adapter 1 configured as described above, when the water distribution pipe C as shown in FIG. 1 is replaced, first, the water distribution pipes A and B are cut off and soft seal valves are installed as valves V1 and V2. The adapters 1 and 1 are connected to the receiving pipe portions 20 and 20 of the soft seal valves. At this time, after the insertion tube 3 is pushed into the inner diameter of the receiving tube portion 20 at the rotational position where the connecting tube 4 is on the upper side, the receiving ring 9 is attached to the constricted portion 26 of the receiving tube portion 20, and the bolt 10 is passed through the receiving ring 9 and screwed into the flange 2 of the adapter 1. The insertion tube 3 is further pushed in by this screwing, and the flange 2 comes into contact with the end portion of the receiving tube portion 20, and the attachment of the adapter 1 is completed. In addition, when attaching the adapter 1, it is desirable to apply a lubricant to the outer periphery of the insertion tube 3 in advance so that the insertion tube 3 is easily pushed.

And the temporary water distribution pipe 30 is connected between the connection pipes 4 and 4 of both adapters 1, 1, and the water supply pipe to each residential land etc. is connected as shown by the dotted line in the same figure, and the water supply of the water distribution pipes A and B is cut off. If the soft seal valve is released and the manual opening / closing valve 5 is opened, water is supplied to each residential land. In this way, the water distribution pipe C is replaced with a new pipe while the temporary water distribution pipe 30 is connected.
In each adapter 1, the connection pipe 4 is connected on the upper side of the insertion tube 3, so even if air is mixed during installation, it can be easily eliminated on the connection pipe 4 side, and mud etc. are prevented from being mixed. The Conversely, if the adapter 1 is connected so that the connecting pipe 4 is on the lower side of the plug-in cylinder 3, pipe cleaning such as discharge of red water from the existing water distribution pipe can be performed easily.

  After installing the new pipe, after closing the soft seal valve and the manual opening / closing valve 5 of each adapter 1, the water supply pipe 31 is replaced with the new pipe, and the temporary water distribution pipe 30 is removed from the connection pipe 4 of each adapter 1. The bolt 10 is removed from the flange 2, the receiving ring 9 is removed, and the adapter 1 is extracted from the receiving pipe portion 20. At this time, if the bolts are screwed into the screw holes 7 and 7 of the flange 2 and the flange 2 is pulled using the bolts, the adapter 1 can be easily removed from the receiving pipe portion 20. After that, the new pipe and the receiving pipe section 20 may be connected using a cut pipe or a joint ring.

Thus, according to the said form, it is provided in the flange 2 larger diameter than the receiving pipe part 20, and the one surface of the flange 2, it can press-fit into the receiving pipe part 20, and a front-end | tip is a lock ring. The insertion tube 3 having a length that does not reach 25, the connection tube 4 that is provided on the other surface of the flange 2 and that communicates with the insertion tube 3 and can be connected to the temporary water pipe 30 and the flange 2 are received. By using the adapter 1 provided with the receiving ring 9 and the bolt 10 that are fixed to the mouth tube portion 20 in a pressed state, it can be easily attached to and detached from the mouth tube portion 20 in a short time. Therefore, the temporary water distribution pipe 30 can be easily installed without using a pipe detaching device, and work efficiency is improved. In addition, since the work pit is also space-saving, the construction section can be minimized and the construction period can be shortened.
In particular, the fixing means for the flange 2 is configured such that the receiving ring 9 mounted on the outer periphery of the receiving pipe portion 20 and the flange 2 are connected by the bolt 10, so that the shape of the receiving pipe portion 20 is utilized. The flange 2 can be fixed easily and reliably.

  The fixing means for the flange is not limited to the above-described form. For example, as shown in FIG. 4A, the receiving ring is connected to the concentric arc-shaped connecting plate 13 on the side surface of the end portion of the semicircular arc-shaped plate body 12. , And a structure in which a receiving ring 9a is formed by combining a pair of half rings 11, 11 provided with through holes 14, 14,... At equal intervals including the connecting plate 13, as shown in FIG. Then, when the bolt 10 is screwed into the flange 2 by assembling to the receiving pipe portion 20 and passing through the through holes 14 and 14 of the one connecting plate 13 and the other plate body 12, the half rings 11 and 11 are integrated. And the mounting of the receiving ring 9a can be performed at the same time, so that it is not necessary to assemble the half rings 11 and 11 together before connecting them to the flange.

Further, the hooks 15, 15... Are not limited to those connected by bolts as in the above embodiment, but are hooked to the through holes of the rings 9 and 9 a as shown in FIG. It is possible to change the design such as stopping the flange 2 and pressing the flange 2 against the receiving pipe portion 20 by tightening the nut 16 on the proximal end side. In this case, conversely, a hook bar 15 may be provided on the receiving ring side so that the tip is hooked on the flange 2.
Further, the receiving ring may be attached to the small-diameter portion on the back side when the receiving pipe portion has no constricted portion. At this time, when the outer surface of the small diameter portion is inclined, it is desirable that the inner surface of the receiving ring is tapered in accordance with the inclination.
However, in the case of a soft seal valve, an annular portion 27 is often provided on the outer surface of the receiving tube portion 20 as shown in FIG. 6, and the hook rod 15 is locked using this annular portion 27. By doing so, the receiving ring becomes unnecessary, and the work becomes easier.

On the other hand, the number of connecting pipes provided in the adapter is not limited to one, and a plurality of connecting pipes having different diameters and types may be provided so that any connecting pipe can be selected as necessary. Of course, the manual on-off valve can be omitted.
For example, the adapter 1 shown in FIG. 5 is provided with two connection pipes 4 having a manual open / close valve 5 and no connection pipe 4a. In this case as well, the inner diameter portions of the connection pipes 4 and 4a Since it is provided at a position in contact with the inner periphery, it may be mounted so that the connecting pipe to be used is positioned above the plug-in cylinder 3.
Furthermore, the connection portion is not limited to the above-described connection pipe, and other forms such as, for example, a screw connection provided in the flange of the adapter and a temporary water distribution pipe can be directly screwed and connected.

In addition, in the above embodiment, the case where a temporary water distribution pipe is connected to the receiving pipe portion of the soft seal valve is described. However, the present invention is not limited to the soft seal valve. The adapter of the present invention can be used. Of course, other types such as the S type may be used as the earthquake resistant joint, and the diameter and length of the plug-in tube may be changed according to the type of the earthquake resistant joint.
On the other hand, although the said form demonstrated in the case of using a temporary distribution pipe in a water pipe, application of this invention is possible also when using temporary piping in a gas pipe.

It is explanatory drawing which shows the cloth replacement of a water pipe. It is explanatory drawing of an adapter, (A) shows a side surface, (B) shows a back surface, respectively. It is explanatory drawing which shows the state which mounted | wore the adapter pipe | tube part with the adapter. (A) shows the side and front of the modified half ring, and (B) shows the front of the receiving ring. It is explanatory drawing which shows the state which mounted | wore the receiving pipe part with the adapter of the example of a change. It is explanatory drawing which shows the mounting state of the adapter using a hook stick | rod.

Explanation of symbols

  1. ・ Piping connection adapter, 2. ・ Flange, 3. ・ Plug tube, 4, 4a ・ ・ Connection pipe, 5. ・ Manual open / close valve, 6,7 ・ ・ Screw hole, 9, 9a ・ ・ Receiver Ring, 10 ·· bolt, 15 ·· Hook bar, 20 ·· Receptacle tube portion, 26 ·· Constriction portion, 30 ·· Temporary water pipe.

Claims (4)

A pipe connection adapter used for connecting a temporary pipe to a receiving pipe part of an earthquake-resistant joint provided with a lock ring for locking the tip of an insertion pipe part on an inner peripheral surface,
A flange having a diameter larger than that of the receiving pipe portion, and an insertion tube provided on one surface of the flange, press-fit into the receiving pipe portion, and having a length that does not reach the lock ring at the tip. A connecting portion that is provided on the other surface of the flange and communicates with the inside of the plug-in cylinder and can be connected to the temporary pipe; and a fixing means for fixing the flange in a pressed state to the receiving pipe portion; An adapter for connecting pipes, characterized by comprising:   The adapter for pipe connection according to claim 1, wherein the fixing means connects the receiving ring mounted on the outer periphery of the receiving pipe portion and the flange with a bolt.   The pipe connection adapter according to claim 1 or 2, wherein the connection portion is provided at a position eccentric from a center of the insertion tube so that an inner diameter portion thereof is in contact with an inner periphery of the insertion tube.   The insertion tube of the pipe connection adapter according to any one of claims 1 to 3, is inserted into the receiving pipe portion of the earthquake-resistant joint provided with a lock ring for locking the distal end of the insertion pipe portion on the inner peripheral surface, A method for connecting a temporary pipe to an earthquake-resistant joint, wherein a flange of the pipe connection adapter is fixed to the receiving pipe part by a fixing means, and a temporary pipe is connected to the connection part of the pipe connection adapter.

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