JP2017194115A - Pipe fitting - Google Patents

Abstract

Provided is a pipe joint member that facilitates connection work between a cast iron pipe and a temporary pipe when a water pipe and a water pipe constructed of a cast iron pipe are renewed to construct a pipe of another material. A pipe joint member used to connect an existing pipe made of a cast iron pipe and a temporary pipe, a large-diameter pipe portion 11 having an outer diameter corresponding to the outer diameter of the cast iron pipe on one side, and a temporary pipe on the other side. In a metal tubular body of an appropriate length provided with a small-diameter tube portion 12 having the same diameter as the tube diameter of the connecting portion, a shaft-outer periphery with a short-length insertion tube portion 13 left at the end of the large-diameter tube portion 11 A connecting portion 14 including a connecting flange portion 141 and a protruding ring portion 142 for packing press is provided in front of the connecting flange portion, and a pipe connecting portion 15 for an existing joint is provided at a pipe end of the small-diameter pipe portion 12. Provided. [Selection diagram] Fig. 1

Description

  The present invention relates to a pipe joint member used when connecting to a temporary pipe in an existing pipe line using a cast iron pipe.

  When constructing a new pipeline for renewing existing cast iron pipelines in water and sewage systems, temporary piping is required during the construction of the updated pipeline, and stainless steel, steel, and resin pipes are used as temporary piping. ing.

  In Patent Document 1 (Japanese Patent Laid-Open No. 11-108270) and Patent Document 2 (Japanese Patent Laid-Open No. 2012-42027), the above-mentioned cast iron pipe that is an existing pipe and the resin pipe that is a renewed pipe are connected. A pipe joint is disclosed.

  Patent Document 1 basically includes a sleeve body provided with a flange similar to a normal cast iron pipe connection (non-reception connection), and a press ring (mechanical joint) provided on each of the cast iron pipe and the polyethylene pipe. A pipe joint structure is disclosed. In Patent Document 2, a joint body (sleeve body) having flange portions at both ends is attached to a cast iron pipe end with a cast iron pipe push ring, and an enlarged outer diameter portion for locking is provided at the tip portion. The intermediate tube is inserted into the main ring body, and the resin intermediate tube is attached to the main ring body with a resin tube push ring. A resin pipe line is appropriately connected to the base end (connection end) of the resin intermediate pipe. They are connected by means.

Japanese Patent Laid-Open No. 11-108270. Unexamined-Japanese-Patent No. 2012-42027.

  The dissimilar pipe joint disclosed in the above-mentioned patent document is a connection between a cast iron pipe and a resin pipe, and a special-shaped resin intervening pipe is required for the pipe joint to connect the resin pipe. The aforementioned joint for resin pipes cannot be applied to the connection between a cast iron pipe and a stainless steel pipe / steel pipe as it is. Moreover, even though the nominal diameter is the same for cast iron pipes and stainless steel pipes / steel pipes, the actual dimensions (outer diameter and inner diameter) are different, and it is necessary to cope with this difference. Further, many cast iron pipes are formed with a receiving end at one end and an insertion end at the other end, and there are cases where the connecting portion is a receiving opening and an insertion end. Further, in the case of a stainless steel pipe or a steel pipe, when a push ring (mechanical joint) is employed, the push claw (bow claw) is more slippery than the cast iron pipe, and the fixed state may be released.

  Therefore, the present invention proposes a novel pipe joint member that can easily realize the construction of a temporary pipe (connection end is a metal pipe) connected to a cast iron pipe line.

  The pipe joint member according to the present invention is a pipe joint member used to connect an existing pipe and a temporary pipe made of a cast iron pipe, and has a large diameter pipe portion that matches the outer diameter of the cast iron pipe on one side, and the other side. In the stainless steel tubular body of appropriate length with a small-diameter pipe part with the same diameter as the temporary pipe connection part on the side, the rear of the shaft leaving the short insertion pipe part at the end of the large-diameter pipe part Provided on the outer peripheral surface is a connecting flange part and a connecting part consisting of a protruding ring part for packing pressing in front of the connecting flange part, and an appropriate existing joint pipe connecting part is provided at the pipe end of the small-diameter pipe part. It is characterized by.

  Thus, when the pipe joint member is connected to the receiving port of the cast iron pipe, like the previously connected cast iron pipe, the insertion pipe portion is inserted into the receiving port, and the packing used at the time of connecting the cast iron pipe is the mouth end of the receiving port. It is placed inside and fixed between the flange portion of the receiving port and the connecting flange portion of the present invention member using a connecting bolt and a tightening nut, and a temporary pipe (a connecting end is a metal pipe) is appropriately attached to the small diameter pipe portion. To connect.

  In addition, when a temporary pipe is connected to the end of the cast iron pipe on the non-receiving port side or a cast iron pipe that does not use a receiving structure, a flanged sleeve used in a cast iron pipe that does not use a receiving structure. The body is used as it is, and the member of the present invention is connected and connected to the sleeve body attached and fixed to the end portion of the cast iron pipe line in the same manner as the above-described receptacle mounting.

  The present invention is as described above, and it is possible to adopt an existing pipe joint as it is for a cast iron pipe and a temporary pipe having the same nominal diameter with slightly different pipe diameters. In contrast, temporary pipes are connected and connected without using a push ring, thereby improving the efficiency of the temporary pipe construction work.

The front view which abbreviate | omitted and cut off the embodiment of this invention. Explanatory drawing of the same use state. Figure.

  Next, an embodiment of the present invention will be described. The pipe joint member 1 of the present invention shown in the embodiment includes a cast iron pipe 2 serving as a connection location in a cast iron pipe and a stainless pipe 3 (or a temporary pipe having the same nominal diameter as the cast iron pipe 2 connected to the cast iron pipe) (or In the case where the connection is made at the receiving port 21 of the cast iron pipe, the packing 4 is connected to the packing 4 and is connected to the temporary pipe by the steel pipe or the temporary pipe by the resin pipe. Bolts 5 and tightening nuts 6 and housing joints 7 serving as stainless steel pipe joints are used.

  The pipe joint member 1 is formed of a stainless material (a steel material in the case of a temporary pipe made of a steel pipe). The main body is a tube having an appropriate length that changes the pipe diameter in the middle, and one side is the outer diameter of the cast iron pipe 2. And the other side is a small-diameter pipe portion 12 having the same diameter as the stainless steel pipe 3 serving as a temporary pipe. Further, a connecting portion 14 is provided on the outer peripheral surface of the shaft rear side in the vicinity of the end portion of the large-diameter tube portion 11, leaving the insertion tube portion 13 having a short length (a length corresponding to the receiving port 21).

  The connecting portion 14 includes a connecting flange portion 141 and a protruding ring portion 142 for pressing the packing in front of the connecting flange portion 141. Further, in the vicinity of the pipe end of the small-diameter pipe part 12, a pipe coupling part 15 for attaching the housing joint 7 and connecting to the stainless steel pipe 3 is provided. In addition, although the said pipe connection part 15 is shown in figure by the protrusion part, depending on the joint structure to be used, it may be a concave protrusion or the latching protrusion corresponding to a socket structure. Of course, in the case of temporary piping using a steel pipe, a connection structure frequently used for steel pipe connection can be employed.

  Thus, in order to connect the cast iron pipe 2 and the stainless steel pipe 3 using the pipe joint member 1, the pipe joint member 1 is attached to the receiving port 21 of the cast iron pipe 2, and this receiving port 21 is provided. The cast iron pipe 2 is provided with a flange portion 22 having a bolt hole at the pipe end.

  Therefore, like the construction of the conventional cast iron pipe line, the packing 4 used when connecting the cast iron pipe 2 is arranged in the mouth end of the receiving port 21 (outer periphery of the insertion tube portion 13), and the insertion tube portion 13 is inserted into the receiving port 21. When the flange portion 22 of the receiving port 21 and the connecting flange portion 141 are connected and fixed using the connecting bolt 5 and the tightening nut 6, the packing 4 is pressed in the distal direction by the protruding ring portion 142, and the water sealing state Thus, the pipe joint member 1 and the cast iron pipe 2 are connected.

  Thereafter, the temporary pipe (stainless steel pipe) 3 is appropriately connected to the small-diameter pipe portion 12 with an existing connection joint (housing joint 7 or the like).

  Alternatively, when there is no receiving port 21 which is a connecting portion of the cast iron pipe 2a for connecting the temporary pipe (stainless steel pipe 3), as shown in FIG. The body 8, the push wheel (mechanical joint) 9, and the packing 4a are used.

  The sleeve body 8 has an outer diameter and a length into which the cast iron pipe 2a is inserted from both ends, and is provided with connecting flange portions 81 and 82 at both ends, and the presser wheel 9 is external to the cast iron pipe 2a. A connecting bolt 91, a push bolt 92, an arcuate claw 93, and a packing pressing projection 94 are provided.

  A sleeve body 8 is attached (connected) to the pipe end of the cast iron pipe 2a, and a cast iron pipe 2a with a packing 4a and a cast iron pipe pusher wheel 9 inserted is inserted into one end of the sleeve body 8 as before. By tightening the connecting bolt 91 and the tightening nut 95, the packing 4a is pressed to seal the sleeve body 8 and the cast iron pipe 2a together, and the press ring 9 is fixed to the cast iron pipe 2a by the pressing bolt 92.

  Then, the insertion pipe portion 13 of the pipe joint member 1 having the packing 4 attached to the other end of the sleeve body 8 is inserted, and the connecting bolt 5 and the tightening nut are provided between the flange portion 82 of the sleeve body 8 and the connecting flange portion 141. When the coupling 6 is connected and fixed, the protruding ring portion 142 presses the packing 4 in the distal direction, and the pipe joint member 1 and the sleeve body 8 are connected and connected in a water-sealed state.

  Therefore, a temporary pipe is constructed by connecting a stainless pipe 3 for temporary piping (metal end portion of other temporary piping) to the pipe coupling member 1 using an existing joint.

DESCRIPTION OF SYMBOLS 1 Pipe joint member 11 Large diameter pipe part 12 Small diameter pipe part 13 Insertion pipe part 14 Connection part 141 Connection flange part 142 Projection ring part 15 Pipe connection part 2,2a Cast iron pipe 21 Receiving port 22 Flange part 3 Stainless steel pipe (temporary piping)
4, 4a Packing 5 Coupling bolt 6 Tightening nut 7 Housing joint 8 Sleeve body 81, 82 Flange 9 Press ring 91 Coupling bolt 92 Pushing bolt 93 Arching claw 94 Packing pressing projection 95 Tightening nut

Claims (3)

  A pipe joint member used to connect an existing pipe and a temporary pipe made of cast iron pipe, a large-diameter pipe portion matching the outer diameter of the cast iron pipe on one side, and a pipe of a temporary pipe connection portion on the other side In a metal cylindrical main body of an appropriate length provided with a small-diameter pipe portion having the same diameter as the diameter, on the outer peripheral surface of the shaft leaving a short insertion tube portion at the end of the large-diameter pipe portion, a connecting flange portion and A pipe joint member, characterized in that a coupling part composed of a protruding ring part for packing pressing is provided in front of the coupling flange part, and an appropriate pipe coupling part for an existing joint is provided at the pipe end of the small-diameter pipe part.   The pipe joint member according to claim 1, wherein the pipe connection part is a protrusion for a housing joint.   The pipe joint member according to claim 1, wherein the pipe connection part has an insertion connection structure to a socket part provided in the temporary pipe.

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