JP4827171B2 - Pipe end blocking method using pipe stoppers - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plug for a pipe and a construction method for closing a pipe end by using it, capable of being manufactured at low cost and capable of closing the pipe end with excellent work efficiency without increasing the size and adopting a complicated structure. <P>SOLUTION: The plug for the pipe is provided with a flange part 2a, and a cylindrical part 2b extended on a back surface side of the flange part 2a and inserted into a pipe inner part, and is abutted on the pipe end part and can close an opening part 1a formed on the pipe end part. A fitting part 2a1 to be connected to a lever block 8 for inserting the plug for the pipe into the pipe inner part is formed on the flange part 2a, a protrusion 2b1 or a recession 2b2 is formed on an outer peripheral surface in the middle in the longitudinal direction of the cylindrical part 2b along the peripheral direction, and the plug for the pipe can be locked by the protrusion 2b1 or the recession 2b2 by a bending prevention ring 4 fitted into the pipe 1, and the outer peripheral surface between an end of the cylindrical part 2b and the protrusion 2b1 or the recession 2b2 is abutted on a seal material 3 fitted in the pipe inner peripheral surface, and sealing can be achieved. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

The present invention relates to a pipe end closing method using a pipe plug , and more specifically, includes a flange part and a cylindrical part that extends on the back side of the flange part and is inserted into the pipe, and is in contact with the pipe end part. The present invention relates to a pipe end closing method using a pipe stopper capable of closing an opening formed in the pipe end.

  Pipes for fluids such as tap water are buried and stretched in the ground through complicated routes, but at the end of such pipes (hereinafter sometimes referred to as pipe ends), they are temporarily blocked. There may be a need.

  For example, there is a construction schedule to be further extended in the middle of the piping, but the extension work is not immediately started or the pipe end needs to be closed once in preparation for future construction.

  As such an airtight plug for closing the tube end, an airtight plug for a plug joint including a cover plate that covers the tube end and an insertion member that is attached to the cover plate and inserted into the tube has been proposed (for example, Patent Document 1).

Japanese Utility Model Publication No. 62-119593

  However, although the above-described prior art pipe stoppers ensure sealing performance and the end of the pipe is considerably easy to seal, the sealing mechanism allows the sealing material attached to the tip of the insertion member to be inserted from the inlet in the pipe. Since the sealing is performed by contacting the inner peripheral surface of the straight portion in the pipe which is considerably deep, it is necessary to lengthen the insertion member. As a result, the shape of the tube plug is increased in size and is not only difficult to handle, it also costs material costs, and the structure for compressing and fixing the sealing material at the tip of the insertion member is complicated, and in this respect the manufacturing cost does not decrease. There was a problem.

Therefore, an object of the present invention is to provide a tube end closing method using a tube plug that can be manufactured at a low cost without increasing the size or adopting a complicated structure and yet can close the tube end with good workability. There is to do.

The characteristic configuration of the pipe plug used in the present invention includes a flange part and a cylindrical part that extends on the back side of the flange part and is inserted into the pipe. The opening formed at the end can be closed, and the flange is formed with an engaging portion for connecting with an insertion tool for inserting the tube plug into the tube. On the outer peripheral surface in the longitudinal direction of the shape portion, a ridge or a recess is formed in the circumferential direction, and the ridge or recess is locked by a fastener fitted inside the pipe. The outer peripheral surface between the tip of the cylindrical portion and the protruding portion or the concave portion comes into contact with a sealing material fitted in the inner peripheral surface of the pipe and can be sealed. There is in being.

  According to this configuration, since the sealing material fitted in advance on the inner peripheral surface of the pipe comes into contact with the outer peripheral surface of the cylindrical portion inserted into the pipe and can be sealed, airtightness can be secured. It is not necessary to lengthen the cylindrical portion, and the overall shape can be reduced in size. In addition, since the seal mechanism does not employ a particularly complicated mechanism, the manufacturing cost can be reduced, and the insertion tool can be easily attached and detached, so that the workability is good and the tube is easy. The end can be occluded.

  As a result, it has been possible to provide a pipe plug that can be manufactured at low cost without increasing the size or adopting a complicated structure, and yet can close the pipe end with good workability.

  The ridge portion is configured to have an inclined shape in which the skirt portion is somewhat wider than the projecting tip, and when the cylindrical portion is inserted into the tube, the inside of the tube from the position where the fastener is locked. It is preferable that it is formed in the said cylindrical part so that it may be located in the side.

  According to this configuration, the fastening tool that fixes the pipe and the pipe plug connected to the pipe end or the pipe end is fitted on the inner peripheral surface of the pipe and is somewhat hung down on the inner peripheral face side of the pipe. Even if the inner peripheral surface side of the fastener comes into contact with the ridge, when the pipe stopper is pushed into the pipe, the hanging fastener is pushed up smoothly and the pipe stopper is easily inserted from the pipe end. can do.

  The concave portion is configured to be inclined so as to extend somewhat from the bottom toward the surface, and is located at a position where the fastener is locked when the cylindrical portion is inserted into the tube. Thus, it is preferable that the tubular portion is formed so that the fastening tool can be fitted into the concave portion and locked.

  Even with this configuration, the pipe and the pipe plug can be firmly clamped and fixed by the fastening tool, and even if an external force such as the water pressure in the pipe after passing water acts, the pipe plug can be more effectively prevented from coming out. .

  It is preferable that the insertion tool is a lever block having a pair of hook members, and a plurality of engaging portions for connecting to the lever block are formed at substantially equal intervals on the flange portion.

  According to this configuration, the lever block is versatile and easy to use, and it is one type of tool that is always carried by an operator, so that the pipe plug can be easily attached without preparing a special jig. In addition to being able to insert into the pipe, since the plurality of engaging portions are formed at substantially equal intervals in the flange portion, by using this lever block, through the engaging portion of the pipe plug, A tube plug can be inserted into the tube from the tube end, and the opening of the tube can be closed with a uniform pressing force, so that the tube end can be closed more stably with good workability.

  It is preferable that a push bolt hole for detaching the pipe plug from the opening is formed in the flange portion.

  According to this configuration, when the tube end is once closed and then the tube plug is removed again to be connected to a new tube, the push bolt hole has a push shaft having a bolt shaft longer than the thickness of the flange portion. By inserting the bolt and rotating it in the tightening direction, the closed tube stopper can be easily and reliably removed from the opening. Of course, while the tube end is closed, a closing jig such as a screw bolt having a short bolt shaft can be screwed into the push bolt hole.

Further, the characteristic configuration of the pipe end closing method according to the present invention includes a flange part and a cylindrical part that extends on the back side of the flange part and is inserted into the pipe, and the pipe end part of the fluid pipe The opening formed in the pipe end portion can be closed, and an engaging portion for connecting to the insertion tool is formed in the flange portion. A protrusion or recess is formed in the circumferential direction on the outer peripheral surface in the middle of the longitudinal direction, and the protrusion or recess can be locked by a fastener fitted inside the pipe. And an outer peripheral surface between the tip of the cylindrical portion and the protruding portion or the concave portion comes into contact with a sealing material fitted in the inner peripheral surface of the tube and can be sealed. with stopper, the tube outer peripheral surface in the vicinity of the tube end portion of the fluid pipe, inserting Engineering for inserting a plug for the tube inside the tube A step of fixing the bundling member having an engagement portion for connecting fitted with the cylindrical portion of the plug for the tube inserted into the opening of the tube end, the distal end of the cylindrical portion is the seal in was inserted to the extent that contacts the timber, until said a step of connecting the insertion tool to the flange portion of the plug for the tube, by operating the insertion tool, the plug for the tube, which brought into contact before Symbol tube end A step of inserting the tube plug into the tube, a step of fixing the tube plug to the tube by tightening a fastener fitted inside the tube inner peripheral surface after the tube plug has been inserted into the tube, and And a step of removing the insertion tool and the bundling member after the tube stopper has been fixed to the tube.

  According to this configuration, it is possible to provide a pipe end closing method using a pipe plug that can be manufactured at a low cost without enlarging the shape or adopting a complicated structure and yet can close the pipe end with good workability. Can do. In this case, the sealing material and the fastener may be fitted in advance on the inner peripheral surface of the pipe, or may be fitted in the inner peripheral surface of the pipe when performing the pipe end closing method using the pipe plug. Also good.

  A lever block having a pair of hook members is used as the insertion tool, and one of the hook members is locked to an engaging portion provided in a flange portion of the pipe plug, and the other hook member is connected to the binding member. It is preferable that the tube plug is inserted into the tube by operating the insertion tool while being engaged with the engagement portion formed on the tube.

  According to this configuration, the lever block is versatile and easy to use, and it is one type of tool that is always carried by an operator, so that the pipe plug can be easily attached without preparing a special jig. It can be inserted into the tube.

This onset Ming embodiment will be described in detail with reference to the accompanying drawings. FIG. 1 will be described by taking as an example a case where a pipe end to which a deformed pipe having a different pipe diameter can be connected is closed. FIG. 3 is a plan sectional view for explaining that the tube plug 2 is inserted and attached to the end of the tube 1, wherein the upper half view shows the state before the tube plug 2 is inserted, and the lower half view shows the tube plug 2 as the deformed tube 1. The top sectional drawing which finished inserting in the edge part of is shown.

  The end of the tube 1 is expanded so that it can be connected to pipes having different tube diameters, and a rubber packing 3 as a seal member is fitted inside the inner peripheral portion of the end of the tube 1, and further, the tube A bend preventing ring 4 that is a fastening tool that fastens and fixes a tube to be connected in the future from the outer peripheral surface side thereof so that it is difficult to bend is fitted into the end 1a side of the end.

  As shown in FIG. 4, the anti-bending ring 4 is divided into four parts, and each ring piece 4a is fitted into the inner peripheral surface of the end portion of the tube 1 in FIG. A resin stuffing or the like is inserted into the gap between the pieces 4a. Further, the bending prevention ring is directed toward the outer peripheral surface of the tube plug 2 by inserting the set bolt 7 into the bolt insertion hole formed in the outer peripheral surface of the end portion of the tube 1 toward the outer peripheral surface of the bending prevention ring 4. 4 is pressed and fixed.

  A band 5 that is a kind of a binding member is externally fitted to a straight pipe portion from the inside to the pipe end. As shown in FIG. 5, the band 5 is divided into two parts, and is externally fitted to the outer peripheral surface of the straight pipe portion of the pipe 1. Equivalently, only the shaft is shown in FIG.

  The pipe stopper 2 will be described in more detail. As shown in FIG. 2, the pipe plug 2 includes a flange portion 2a and a cylindrical portion 2b that extends on the back side of the flange portion 2a and is inserted into the tube. When inserted into the tube 1, as shown in FIG. 1, the flange portion 2 a comes into contact with the tube end and closes the opening 1 a formed at the tube end.

  In the flange portion 2a, two engaging portions 2a1 for connecting the lever 2 (one type of insertion tool) 8 for inserting the tube plug 2 into the tube are formed at substantially equal intervals. These engaging portions 2a1 and the bolts 6 of the band 5 that are externally fitted to the straight pipe portions of the pipes are provided at both ends of the chain 8a extending from the main body of the lever block 8, as shown in FIG. The hook members 8b are respectively locked.

  Further, as shown in FIG. 3, the flange portion 2a has an air hole 2a2 located at the upper portion and an air hole 2a2 in order to clean the inside of the pipe and check the sealing performance after closing the pipe end. A slightly larger diameter drain hole 2a3 is formed at a lower position, and a push bolt hole 2a4 for removing the pipe plug 2 from the opening 1a in preparation for newly connecting a pipe. Are formed at two locations, and the opening 1a at the end of the tube is closed by the tube plug 2, a closing jig (not shown) is detachably screwed to close each hole.

  As shown in a partially enlarged view in FIG. 2, the tubular portion 2 b of the tube plug 2 is provided with a protruding portion 2 b 1 in the circumferential direction on the outer peripheral surface in the middle of the longitudinal direction. 2b1 is formed in an inclined shape in which the skirt portion is somewhat wider than the protruding tip. When the cylindrical portion 2b is inserted into the inside of the tube, the protruding portion 2b1 is located on the cylindrical portion 2b so as to be positioned on the inner side of the tube from the locking position by the bending prevention ring 4 fitted inside the tube 1. Is formed. Since the skirt portion of the ridge portion 2b1 is configured to be slightly inclined, the bending prevention ring 4 before tightening is somewhat hung from the inner peripheral surface side, and the bending prevention ring 4 is formed on the ridge portion 2b1. Even if the inner peripheral surface side of the tube contacts, the tube-shaped plug 2 is pushed into the tube, whereby the sagging anti-bending ring 4 is smoothly pushed upward, and the tube plug 2 can be easily inserted from the end of the tube 1. In addition, when removing the plug 2 for the pipe from the opening 1a, if the plug body is pulled out after loosening the set bolt, the pushed-in bending prevention ring 4 is smoothly pushed upward, and the end of the pipe 1 is removed. The tube stopper 2 can be easily removed from the section.

  Next, a pipe end closing method using the pipe stopper according to the present embodiment will be described. First, a band 5 fitted with a bolt (engagement part) 6 for connecting to a lever block 8 for inserting the pipe plug 2 into the pipe 1 is fitted on the outer peripheral surface of the straight pipe part near the pipe end, By tightening the bolt 6, the band 5 is fixed to the outer peripheral surface of the straight pipe portion.

  Next, the rubber packing 3 and the bend preventing ring 4 are respectively fitted into the recessed grooves formed on the inner peripheral surface of the pipe from the opening 1a at the pipe end. Then, when the tubular portion 2b of the tube plug 2 is inserted from the opening 1a and is inserted so that the tip of the tube portion 2b contacts the rubber packing 6, the flange block 2a of the tube plug 2 is connected to the lever block 8 by While connecting one hook member 8b, the other hook member 8b is engaged with the bolt 6 inserted into the bolt insertion hole 5a of the band 5.

  The lever block 8 is operated to insert the tube plug 2 into the tube until it contacts the tube end. After the tube stopper 2 has been inserted into the tube (lower half of FIG. 1), the set bolt 7 is tightened against the bending prevention ring 4, and the bending prevention ring 4 is projected toward the tube stopper 2 and pressed. The tube stopper 2 is firmly fixed to the tube 1.

  After fixing the tube stopper 2 to the tube 1, the lever block 8 and the band 5 are removed. The tube end closing operation using the tube plug is thus completed, but in order to confirm the adhesion and sealability at the tube end, the air in the tube pushed out by the injected water of the tube plug 2 is extracted from the air hole 2a2. After that, perform a water pressure test to check for water leaks. If it can be confirmed that there is no water leakage, a closing jig (not shown) is screwed into the air hole 2a2 to close it, and the tube end closing operation is completed.

[Another embodiment]
(1) In the above embodiment, the example in which the protrusion 2b1 is formed in the circumferential direction on the outer peripheral surface in the longitudinal direction of the tubular portion 2b of the pipe plug 2 is shown, but instead of the protrusion 2b1, As shown in FIG. 6, the concave portion 2b2 may be formed. Even in this case, the tube and the tube plug can be firmly clamped and fixed by the bending ring 4 as a fastener, and the tube plug can be pulled out even if an external force such as the water pressure in the tube is applied after passing water. It can be effectively prevented. In particular, since the bent ring 4 is fitted to the concave portion 2b2, the pipe stopper 2 can be pressed and fixed more firmly.
(2) In the above embodiment, two engaging portions 2a1 for connecting to the lever block 8 are provided in the flange portion 2a of the pipe plug 2, and two bolt insertion holes 5a are provided in the band 5 as well. Although shown, it is not limited to this, For example, with respect to a larger diameter pipe | tube, three or more engaging parts 2a1 and the bolt penetration hole 5a are provided, and three or more lever blocks 8 are used. Accordingly, the pipe stopper 2 may be inserted into the pipe with good workability.
(3) In the above embodiment, the lever block is used as an example of the insertion tool. However, the insertion tool is not limited to this, and a turnbuckle having hook portions at both ends is used. It may be anything. In short, it suffices if the pipe stopper can be inserted into the inside from the pipe end with good workability.
(4) In the above embodiment, the tube stopper for closing the end portion of the deformed tube has been described as an example. However, the tube plug of the present embodiment is not only the deformed tube but also the end portion of the deformed tube. It can also be used to close a tube end having an expansion / contraction function and whose diameter is enlarged.

Sectional top view explaining before and behind attachment with respect to piping of the pipe stopper concerning one Embodiment of this invention Half sectional front view of the pipe stopper of FIG. Left side view of the pipe stopper in FIG. Left side view of the anti-bending ring 4 as a fastening tool One of the binding members (A) Left side view, (B) Front view The cross-sectional top view similar to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe 1a Opening part 2 Pipe plug 2a Flange part 2a1 Engagement part 2a4 Push bolt hole 2b Cylindrical part 2b1 Projection part 2b2 Concave part 3 Seal member 4 Fastening tool 5 Binding member 8 Insertion tool 8b Hook member

Claims (5)

An opening formed at the end of the pipe in contact with the pipe end of the pipe for fluid as well as a flange and a cylindrical part extending on the back side of the flange and inserted into the pipe The flange portion is formed with an engaging portion for connecting to an insertion tool, and a protruding portion in the circumferential direction on the outer circumferential surface in the longitudinal direction of the cylindrical portion. Alternatively, a groove portion is formed, and the protrusion portion or the groove portion is configured to be able to be locked by a fastener fitted inside the tube, and the tip of the cylindrical portion and the protrusion Using the stopper for the pipe where the outer peripheral surface between the part or the concave part comes into contact with the sealing material fitted in the inner peripheral surface of the pipe and can be sealed,
The tube outer peripheral surface of the tube end near the fluid pipe, a step of fixing the plug for the tube fitted a binding member having an engagement portion for connecting the insertion tool to be inserted into the tube,
Insert the tubular portion of the tube plug into the opening of the tube end, and insert the insertion tool to the flange portion of the tube plug when inserted so that the tip of the tubular portion contacts the sealing material. And a process of
By operating the insertion tool, a step of inserting within said tube to a plug for the tube, which brought into contact before Symbol tube end,
After inserting the tube plug into the tube, the step of fastening the tube plug to the tube by tightening a fastener fitted on the inner peripheral surface of the tube;
Removing the insertion tool and the binding member after the tube stopper has been fixed to the tube;
Pipe end closure method with A lever block having a pair of hook members is used as the insertion tool, and one of the hook members is locked to an engaging portion provided in a flange portion of the pipe plug, and the other hook member is connected to the binding member. The tube end closing method according to claim 1 , wherein the tube plug is inserted into the tube by operating the insertion tool by engaging with the engaging portion formed in the tube. The ridges or recesses formed on the outer peripheral surface of the cylindrical part,
A ridge portion that is configured to be inclined so that the skirt portion is somewhat wider than the protruding tip, and is located on the inner side of the tube from the locking position by the fastener when the cylindrical portion is inserted into the tube. Or
It is configured to have an inclined shape that extends somewhat from the bottom toward the surface, and when the tubular portion is inserted into the tube, the tubular portion is located at a locking position by the fastener, and the fastener is fitted. The tube end closing method according to claim 1 or 2, wherein the tube end is a recessed strip portion that can be locked together. The pipe end closing method according to claim 2, wherein a plurality of engaging portions for connecting with the lever block are formed at substantially equal intervals on the flange portion. The pipe end closing method according to any one of claims 1 to 4, wherein a push bolt hole for detaching the pipe plug from the opening is formed in the flange part.

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