JP7142876B2 - Flange reinforcing jig and its mounting method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a flange reinforcing jig for reinforcing radially outward projecting portions of both cylindrical members, and a method of mounting the same.

Conventionally, a valve case (repair valve case) is composed of a short pipe (cylindrical member) and a valve body (cylindrical member). A reinforcing jig is known that is attached to a divided portion formed by joining a second protruding portion that protrudes radially outward from an end portion with a bolt (see, for example, Patent Literature 1).

The reinforcing jig of Patent Document 1 includes a clamping member that clamps the first protruding portion and the second protruding portion, and a fastening mechanism that pulls the clamping member in the joining direction of the divided portions and fixes them. It has two pressing portions that press the regions on both sides along the circumferential direction of the bolt head on the outer surface of one projecting portion. With this configuration, even if the strength of the bolt deteriorates due to aging of the repair valve, the reinforcement jig reinforces the bolt around the split portion, preventing water leakage from the gap in the split portion. It is possible. In particular, the reinforcing jig of Patent Document 1 presses the regions on both sides of the head of the bolt, so it can be installed even when the space in the radially inner direction of the bolt is narrow, such as in a repair valve case. is possible and highly convenient.

JP 2016-23659 A

By the way, there are various shapes of repair valve cases having divided portions. For example, there are repair valve cases in which the projection amounts of the first and second protrusions are small, and repair valve cases in which the outer peripheral surfaces of short pipes are formed continuously and do not have the first protrusion. When the reinforcing jig of Patent Document 1 is attached to a repair valve case in which the amount of protrusion of the first protrusion and the second protrusion is extremely small, the pressing area of the pressing portion becomes small, so the reinforcement around the bolt becomes insufficient. Moreover, there is a risk that the reinforcing jig will fall off.

In the case of a repair valve case in which the outer peripheral surface of the short pipe is continuously formed and does not have the first projecting portion, the flange projecting from the end of the connection pipe of the air valve case connected to the upper end of the short pipe and the first projecting portion Since a reinforcing jig is required to draw and fix a long distance between the two protruding portions, the overall size of the reinforcing jig becomes large, and the reinforcing jig becomes large as a whole. In addition, since it is difficult to attach a reinforcing jig to a portion of the valve body where the operating portion protrudes, there is a possibility that the desired detachment preventing force cannot be exhibited. As described above, it is difficult to deal with all repair valves having various shapes with conventional reinforcing jigs, and there is room for improvement.

Therefore, there is a demand for a flange reinforcing jig that reinforces both radially outwardly projecting portions of both tubular members and that can reinforce the valve case split portion, and a method of mounting the flange reinforcing jig with high work efficiency.

The characteristic configuration of the flange reinforcing jig according to the present invention includes a first projecting portion projecting radially outward from an end portion of the first tubular member and the first projecting portion projecting radially outwardly from an end portion of the second tubular member. a first clamping member that clamps a second protrusion facing the protrusion; a first fastening mechanism that clamps the first clamping member; a second clamping member that clamps the projecting portion and a fourth projecting portion that projects radially outward from an end portion of the fourth tubular member and faces the third projecting portion; and a second fastening that fastens the second clamping member. and a connection mechanism that applies a force in the direction of approaching the first holding member and the second holding member, the connection mechanism having a connection bolt, and the connection bolt being the second holding member. The point is that it is also used as the first fastening mechanism and the second fastening mechanism.

The flange reinforcing jig of this configuration includes a connecting mechanism that brings the first holding member and the second holding member close to each other, which hold both projecting portions of both tubular members. This not only reinforces both protruding portions of both tubular members, but also allows connection when the second tubular member and the third tubular member are composed of the short pipe of the repair valve and the valve case. By bringing the first clamping member and the second clamping member close to each other by means of the mechanism, it is possible to reinforce the divided portion of the valve case. Moreover, even when the first clamping member and the second clamping member are separated from each other, only the dimension of the connecting mechanism needs to be changed, and the dimensions of the first clamping member and the second clamping member need not be changed. Therefore, the manufacturing cost can be saved without increasing the size of the flange reinforcing jig.

Further, in this configuration, if the connecting bolt of the connecting mechanism is used both for the first fastening mechanism for fastening the first clamping member and for the second fastening mechanism for fastening the second clamping member, the first fastening mechanism and the second fastening mechanism can be used. Since a separate installation space for the bolts used in the mechanism is not required, the number of parts can be reduced, the manufacturing cost can be saved, and the flange reinforcing jig can be configured compactly.

In this way, it is possible to provide a flange reinforcing jig with high work efficiency, which can reinforce the radially outer projecting portions of both cylindrical members and also reinforce the valve case dividing portion.

Another characteristic configuration is that the first holding member has a first insertion portion and a first inserted portion that receives the first insertion portion along the approaching direction, and the second holding member has a second It has a second insertion portion and a second inserted portion that receives the second insertion portion along the approaching direction.

As in this configuration, if both the first clamping member and the second clamping member are composed of the insertion portion and the inserted portion that receives the insertion portion along the approaching direction, the axial direction (approaching direction) of the cylindrical member Since the number of tasks increases, work efficiency can be improved.

According to another characteristic configuration, the second fastening mechanism includes a female threaded portion formed in the second insertion portion and screwed to the connecting bolt, and a press nut that presses the outer surface of the second inserted portion. The second fastening mechanism is characterized in that the second insertion portion is drawn and fixed to the second inserted portion by screwing the connecting bolt into the female screw portion and tightening it.

In this configuration, the second insertion portion can be drawn and fixed to the second inserted portion by tightening the connecting bolt, which is work in the axial direction (approaching direction) of the tubular member, so that work efficiency is high.

Another characteristic configuration is that the first fastening mechanism includes a position adjustment nut that presses the outer surface of the first inserted portion to adjust the relative position of the first inserted portion with respect to the first inserted portion; and a proximity nut that presses the outer surface of one insertion portion in the approaching direction, and the first fastening mechanism attaches the proximity nut to the connection bolt in a state in which the relative position is adjusted by the position adjustment nut. By screwing and tightening, the first inserting portion is drawn and fixed to the first inserted portion.

With this configuration, the first insertion portion is drawn and fixed to the first insertion portion simply by tightening the proximity nut, so work efficiency is high.

According to another characteristic configuration, the first clamping member is vertically above the second clamping member, the first insertion portion is vertically above the first inserted portion, and the second The point is that the inserted portion is located above the second insertion portion in the vertical direction.

As in this configuration, the first clamping member is above the second clamping member, and the first insertion portion where the proximity nut abuts against the outer surface is above the first inserted portion. By rotating the connecting bolt, the first fastening mechanism can be activated, and by rotating the connecting bolt from above, the coupling mechanism and the second fastening mechanism can be activated. In other words, the connecting mechanism, the first fastening mechanism, and the second fastening mechanism can all be operated from above. can be operated from Therefore, it is not necessary to demolish the manhole when mounting the flange reinforcing jig, and the working efficiency can be improved.

Another characteristic configuration is a pressing portion that presses the outer surface of the second protruding portion of the first inserted portion and a pressing portion that presses the outer surface of the third protruding portion of the second inserted portion. The present invention further includes a gap holding member that is locked across the first insertion portion and holds the gap between the pressing portion of the first insertion portion and the pressing portion of the second insertion portion.

As in this configuration, if a spacing member is provided across the pressing portion of the first insertion portion whose downward movement is restricted by the position adjustment nut and the pressing portion of the second insertion portion, the second The second inserted portion does not descend due to its own weight, and the gap between the second inserted portion and the second inserted portion does not become smaller than the thickness of the third projecting portion and the fourth projecting portion. As a result, by inserting the flange reinforcing jig from above, the pressing portion of the second inserted portion and the pressing portion of the second insertion portion can be opposed to the outer surfaces of the third projecting portion and the fourth projecting portion. . Therefore, even if the space between the manhole housing the tubular member and the tubular member is narrow, it is not necessary to tear down the manhole when inserting the flange reinforcing jig, and the working efficiency can be improved.

A characteristic configuration of the mounting method of the flange reinforcing jig according to the present invention is that the connecting mechanism, the first fastening mechanism, and the second fastening mechanism are temporarily fixed to the first clamping member and the second clamping member. to the first projecting portion and the second projecting portion and the third projecting portion and the fourth projecting portion; a second step of bringing the pressing portion of the second inserted portion into contact with the outer surface of the third projecting portion while contacting the outer surface; and pressing the pressing nut against the outer surface of the second inserted portion. a third step of tightening the connecting bolt to draw and fix the second insertion portion to the second insertion portion; A fourth step of contacting the outer surface of the second projecting portion; and a fifth step of tightening the proximity nut to draw and fix the first inserting portion to the first inserted portion. .

In this method, the mounting work is performed in a state in which the first clamping member and the second clamping member are integrated by the connecting mechanism, so that the work efficiency can be improved compared to the case of individually mounting the first clamping member and the second clamping member. Moreover, the second holding member is fastened by tightening the connecting bolt, and the first holding member is fastened by tightening the proximity nut, so that the flange reinforcing jig can be quickly installed. Moreover, since it is possible to operate the connection mechanism, the first fastening mechanism, and the second fastening mechanism by operating all the connection bolts and the proximity nuts from above, the manhole housing the tubular member and the tubular member can be separated from each other. The tool can be operated from above even if the gap between the Therefore, it is not necessary to demolish the manhole when mounting the flange reinforcing jig, and the working efficiency can be improved.

It is a perspective view of a tubular member. It is a top view of a division part. 4 is an enlarged vertical cross-sectional view of a tubular member; FIG. It is a figure which shows schematic structure of the to-be-inserted part of a 1st clamping member. It is a figure which shows schematic structure of the insertion part of a 1st clamping member. FIG. 10 is a diagram showing a schematic configuration of an inserted portion of the second holding member; FIG. 4 is a diagram showing a schematic configuration of an insertion portion of a second holding member; FIG. 4 is a perspective view showing a state in which a flange reinforcing jig is attached to the projecting portion of the tubular member; FIG. 4 is a plan view showing a state in which a flange reinforcing jig is attached to the projecting portion of the tubular member; FIG. 10 is a view taken along line XX of FIG. 9; It is a figure which shows the 1st process - 2nd process of the mounting method of a flange fixing jig. It is a figure which shows the 3rd process of the attachment method of a flange fixing jig. It is a diagram showing fourth to fifth steps of the mounting method of the flange fixing jig. 4 is a vertical cross-sectional view of a flange reinforcing jig according to another embodiment 1. FIG. FIG. 10 is a vertical cross-sectional view of a flange reinforcing jig according to another embodiment 2;

EMBODIMENT OF THE INVENTION Below, embodiment of the mounting method of the flange reinforcement jig|tool which concerns on this invention, and a flange reinforcement jig|tool is described based on drawing. However, without being limited to the following embodiments, various modifications are possible without departing from the scope of the invention.

In this embodiment, a flange reinforcing jig (hereinafter referred to as "reinforcing jig P") is used to reinforce both flange portions 11a and Va and both flange portions Ta and 12a, and to reinforce the valve body V and the short pipe. A case of preventing water leakage from the divided portion 1 by applying a pressing force to the divided portion 1 of the repair valve case X made of cast iron and formed by T will be described.

1 to 3 show a connection pipe 11 (an example of a first tubular member), a short pipe T (an example of a second tubular member), a valve body V (an example of a third tubular member) and a branch pipe 12. (An example of the fourth tubular member) and the dividing portion 1 between the short pipe T and the valve body V are shown. At one end of the short pipe T, a first split portion 1A to which the second split portion 1B of the valve body V is joined is formed so as to protrude radially outward of the short pipe T. As shown in FIG. At the other end of the short pipe T, a disk-shaped short pipe flange portion 11a (an example of a first projecting portion) projecting radially outward of the connecting pipe 11 such as an air valve or a fire hydrant is attached. A Ta (an example of a second protrusion) is formed to protrude from the short tube T in the radially outer direction. At one end of the valve box V, a second split portion 1B to which the first split portion 1A of the short pipe T is joined is formed so as to protrude radially outward of the valve box V. As shown in FIG. A disc-shaped valve box to which a disc-shaped branch flange portion 12a (an example of a fourth protruding portion) protruding radially outward from a branch pipe 12 of a main pipe (not shown) is attached to the other end of the valve box V. A flange portion Va (an example of a third projecting portion) is formed to extend radially outward of the valve body V. As shown in FIG.

The first divided portion 1A and the second divided portion 1B are formed in a rectangular shape in plan view. An operating portion 10 capable of rotating a ball valve body Vb, which will be described later, is connected to the first divided portion 1A and the second divided portion 1B.

As shown in FIGS. 2 and 3, the first divided portion 1A is provided with a plurality of (four in this embodiment) through holes 3a that penetrate in the joining direction (axial direction) and are spaced apart in the circumferential direction. ing. A plurality of holes 3b (four holes in the present embodiment) closed on the side opposite to the joint surface 1b are formed in the second divided portion 1B so as to be spaced apart in the circumferential direction. A female thread 3c is formed on the inner peripheral surface of each hole 3b. The split portion 1A and the second split portion 1B are joined together. That is, the head portion 4a of the bolt 4 is exposed on the outer side surface 1a of the first divided portion 1A, and the outer side surface 1a of the second divided portion 1B is a flat surface from which the bolt 4 does not protrude. In addition, although the bolt 4 in this embodiment has shown the example of the bolt which has the head 4a, the structure which tightens a double-threaded bolt with a nut may be sufficient.

As shown in FIG. 1, a connection flange portion 11a of a connection pipe 11 such as an air valve or a fire hydrant and a short pipe flange portion Ta formed at the other end of the short pipe T are connected by a bolt 41a and a nut 41b. . A branch flange portion 12a of a branch pipe 12 such as a water pipe and a valve body flange portion Va formed at the other end of the valve body V are connected by bolts 42a and nuts 42b.

As shown in FIG. 3, a ball valve body Vb is accommodated inside the valve body V, and the ball valve body Vb is rotated by the opening and closing operation of the operation unit 10 to switch between communication and non-communication of the flow path. be done.

1 and 3, the connection flange portion 11a, the short pipe flange portion Ta, the first split portion 1A, the second split portion 1B, the valve body flange portion Va, and the branch flange portion 12a shown in FIGS. The surfaces facing each other in the joining direction (hereinafter referred to as the “axial direction”) when they are joined are the joining surfaces 1b, and the outer surfaces parallel to the joining surfaces 1b and perpendicular to the axial direction are the outer surfaces 1a. explain. Moreover, the upper side and the lower side are described with respect to the vertical direction, and the direction of gravity is the lower side.

(Basic configuration of reinforcing jig)
As shown in FIG. 8, the reinforcing jig P includes a first clamping member 10A and a second clamping member 10B made of cast iron mounted on both the flange portions 11a and Ta and both the flange portions Va and 12a, and the first clamping member A connecting mechanism R that applies a force in the approaching direction to bring the second holding member 10B close to the second holding member 10B. Further, the reinforcing jig P includes a spacing member 9 that maintains the spacing between the first clamping member 10A and the second clamping member 10B.

As shown in FIGS. 8 to 10, the first clamping member 10A has two pressing members that press a region between two nuts 41b adjacent in the circumferential direction on the outer surface 1a of the connecting flange portion 11a of the connecting pipe 11. A first insertion portion 5 having a portion 5C and two pressing portions 6B for pressing a region between the heads of two bolts 41a adjacent in the circumferential direction on the outer surface 1a of the short pipe flange portion Ta of the short pipe T. and a first inserted portion 6 having In addition, the first insertion portion 5 and the first inserted portion 6 are drawn toward (brought close to) the connection flange portion 11a of the connection pipe 11 and the short pipe flange portion Ta of the short pipe T in the joining direction, and are tightened and fixed. A first fastening mechanism Ka is provided. A connecting bolt Ra of a connecting mechanism R, which will be described later, is also used as the first fastening mechanism Ka in the present embodiment.

As shown in FIGS. 5 and 10, the first insertion portion 5 is made of a metal member, and includes a square tubular portion 5A and a flange extending outward along the entire circumference from an outer surface 5a of the square tubular portion 5A. A shaped portion 5B and a pressing portion 5C extending further outward from one of the four sides of the brim portion 5B are integrally provided. The square tube portion 5A has a trapezoidal shape in which the outer surface 5a expands in diameter as it approaches the connection flange portion 11a in a cross-sectional view, and the inner surface 5b is formed in the shape of a circular bottomed square tube.

The inner surface 5b of the square tubular portion 5A is adapted to allow insertion of a male threaded portion Ra2 of a connecting bolt Ra of a connecting mechanism R, which will be described later, without being screwed therewith. The brim portion 5B is formed in a trapezoidal shape when viewed in a cross section perpendicular to the joining direction, and the rectangular tubular portion 5A extends from the central portion. The pressing portion 5C is bifurcated with arms having the same length in plan view. Further, the tip portion of the pressing portion 5C on the side of the rectangular tubular portion 5A is formed as a flat pressing surface 5e.

As shown in FIGS. 4 and 10, the first inserted portion 6 is made of a metal member, and includes a square tubular portion 6A and a pressing member extending outward from one of the four sides of the square tubular portion 6A. It is integrally provided with the part 6B. The square tube portion 6A is formed in a bottomed square tube shape having a trapezoidal shape in which the outer surface 6a and the inner surface 6b increase in diameter as they approach the short pipe flange portion Ta when viewed in a cross section (a cross section perpendicular to the joining direction). ing. Further, the pressing portion 6B is formed so as to extend outward from one of the four sides of the outer surface 6a of the rectangular tubular portion 6A in a bifurcated shape.

The rectangular tubular portion 6A is formed on both ends along the circumferential direction of the inner surface (outer surface 6a) facing the outer peripheral surface of both the flange portions 11a and Ta so as to protrude radially inward and contact the flange portions 11a and Ta. It has a contactable contact portion 6h. When the first insertion portion 5 and the first insertion portion 6 are fixed by the first fastening mechanism Ka, the contact portion 6h contacts both the flange portions 11a and Ta, thereby preventing rotation of the first clamping member 10A. be done.

A tubular inner space 6c for receiving the square tube portion 5A of the first insertion portion 5 is formed inside the square tube portion 6A along the joining direction of both the flange portions 11a and Ta. The tubular inner space 6c is formed in a trapezoidal cross-sectional view, and is formed slightly larger than the outer diameter of the rectangular tubular portion 5A of the first insertion portion 5 having a trapezoidal cross section. Therefore, the cross-sectional shape perpendicular to the joining direction between the outer surface 5a of the square tubular portion 5A of the first insertion portion 5 and the inner surface 6b of the square tubular portion 6A of the first inserted portion 6 is the first insertion portion 5. When inserted into the inserted portion 6, it is slidable in the insertion direction (longitudinal direction of the cylindrical internal space 6c), but relative to the insertion direction (around the axis along the longitudinal direction of the cylindrical internal space 6c). It is formed so that it cannot rotate.

Further, in the tubular inner space 6c, an opening is formed on the side opposite to the side on which the pressing portion 6B is formed. On the side of the cylindrical inner space 6c where the pressing portion 6B is formed, an insertion hole 6d into which a male threaded portion Ra2 of a connecting bolt Ra of a connecting mechanism R, which will be described later, can be inserted without being screwed together, extends through the bottom portion of the square tube portion 5A. An opening is formed in a penetrating state.

The pressing portion 6B is formed in a bifurcated shape with the same arm length in a plan view, and is formed in a tapered shape that becomes farther away from the insertion hole 6d toward the distal end side. Further, the tip portion of the pressing portion 6B on the opening side of the cylindrical inner space 6c is formed as a flat pressing surface 6e.

As shown in FIG. 10 , the first fastening mechanism Ka has a connecting bolt Ra, a proximity nut 91 and a position adjusting nut 92 . With the pressing portion 5C of the first insertion portion 5 in contact with the outer surface 1a of the connection flange portion 11a of the connection pipe 11, the position adjustment nut 92 in contact with the outer surface 6a of the first inserted portion 6 is attached to the connecting bolt Ra. By screwing into the male threaded portion Ra2, the pressing portion 6B of the first inserted portion 6 contacts the outer surface 1a of the short pipe flange portion Ta of the short pipe T, and the first inserted portion of the first inserted portion 6 5 is adjusted. Then, by tightening the proximity nut 91, the first insertion portion 5 and the first inserted portion 6 are pulled toward the joining direction of both the flange portions 11a and Ta, and are fastened and fixed. As a result, the first fastening mechanism Ka functions, and the pressing portion 5C of the first insertion portion 5 presses the connection flange portion 11a of the connection pipe 11 downward to prevent water leakage from the joint surface 1b of the split portion 1. A connecting mechanism R functions for this purpose.

As shown in FIGS. 8 and 10, the second clamping member 10B includes two clamping members that press the region between two nuts 42b adjacent in the circumferential direction on the outer surface 1a of the valve body flange portion Va of the valve body V. It has a second inserted portion 7 having a pressing portion 7B, and two pressing portions 8C for pressing an area between two circumferentially adjacent bolts 42a on the outer surface 1a of the branch flange portion 12a of the branch pipe 12. A second insertion portion 8 is provided. In addition, the second inserted portion 7 and the second inserted portion 8 are drawn toward (brought closer to) the joining direction of the valve body flange portion Va of the valve body V and the branch flange portion 12a of the branch pipe 12, and are tightened and fixed. A second fastening mechanism Kb is provided. The second fastening mechanism Kb in the present embodiment also serves as the connecting bolt Ra of the connecting mechanism R, which will be described later.

As shown in FIGS. 6 and 10, the second inserted portion 7 is made of a metal member, and integrally includes a rectangular tubular portion 7A and a pressing portion 7B. The square tube portion 7A is formed in a bottomed square tube shape having a trapezoidal shape with an outer surface 7a and an inner surface 7b increasing in diameter as they approach the valve body flange portion Va in a cross-sectional view (a cross-sectional view perpendicular to the joining direction). ing. Further, the pressing portion 7B is formed so as to extend outward from one of the four sides of the outer surface 7a of the rectangular tubular portion 7A in a bifurcated shape.

The rectangular tubular portion 7A is formed on both ends along the circumferential direction of the inner surface (outer surface 7a) facing the outer peripheral surfaces of both the flange portions Va and 12a so as to project radially inward and contact the flange portions Va and 12a. It has a pair of abutment portions 7h that can be in contact. When the second insertion portion 7 and the second insertion portion 8 are fixed by the second fastening mechanism Kb, the abutting portion 7h contacts both the flange portions Va and 12a, thereby preventing rotation of the second holding member 10B. be done.

Inside the square tube portion 7A, a tubular inner space 7c is formed along the joining direction of both the flange portions Va and 12a to receive the square tube portion 8A of the second insertion portion 8, which will be described later. The tubular inner space 7c is formed in a trapezoidal shape when viewed in cross section, and is slightly larger than the outer diameter of the trapezoidal rectangular tubular portion 8A. Therefore, the cross-sectional shape perpendicular to the joining direction between the outer surface 8a of the square tube portion 8A of the second insertion portion 8 and the inner surface 7b of the square tube portion 7A of the second inserted portion 7 is the second insertion portion 8. When inserted into the inserted portion 7, it is slidable in the insertion direction (longitudinal direction of the cylindrical internal space 7c), but relative to the insertion direction (around the axis along the longitudinal direction of the cylindrical internal space 7c). It is formed so that it cannot rotate.

Further, in the tubular inner space 7c, an opening is formed on the side opposite to the side on which the pressing portion 7B is formed. On the side of the tubular inner space 7c on which the pressing portion 7B is formed, an insertion hole 7d into which the male threaded portion Ra2 of the connecting bolt Ra can be inserted without being screwed is formed so as to pass through the bottom portion of the rectangular tubular portion 7A. It is

The pressing portion 7B is formed in a bifurcated shape with the same arm length in a plan view, and is formed in a tapered shape that becomes farther away from the insertion hole 7d toward the distal end side. Further, the tip portion of the pressing portion 7B on the opening side of the cylindrical inner space 7c is formed as a flat pressing surface 7e.

As shown in FIGS. 7 and 10, the second insertion portion 8 is made of a metal member, and includes a square tubular portion 8A and a flange extending outward along the entire circumference from an outer surface 8a of the square tubular portion 8A. A shaped portion 8B and a pressing portion 8C extending further outward from one of the four sides of the brim portion 8B are integrally provided. The rectangular tube portion 8A has a trapezoidal shape in which the outer surface 8a expands in diameter as it approaches the branch flange portion 12a when viewed in cross section, and the inner surface 8b is formed in the shape of a circular bottomed rectangular tube.

An inner surface 8b of the rectangular tubular portion 8A is formed with a female threaded portion 8f into which the male threaded portion Ra2 of the connecting bolt Ra can be screwed. The brim portion 8B is formed in a trapezoidal shape when viewed in a cross section perpendicular to the joining direction, and the rectangular tubular portion 8A extends from the central portion. The pressing portion 8C is bifurcated with arms having the same length in plan view. Further, the tip portion of the pressing portion 8C on the side of the rectangular tubular portion 8A is formed as a flat pressing surface 8e.

As shown in FIG. 10, the second fastening mechanism Kb has a connecting bolt Ra, a pressing nut 93 and a positioning nut 94. As shown in FIG. The male threaded portion Ra2 of the connecting bolt Ra is screwed into the female threaded portion 8f of the inner surface 8b of the rectangular tubular portion 8A of the second insertion portion 8, and the pressing nut 93 presses the outer surface 7a of the second inserted portion 7 by means of the positioning nut 94. The connecting bolt Ra is tightened in the fixed state, and the second inserted portion 7 and the second inserted portion 8 are pulled toward the joining direction of both the flange portions Va and 12a and fastened and fixed. As a result, the second fastening mechanism Kb functions, and the pressing portion 8C of the second insertion portion 8 presses the branch flange portion 12a of the branch pipe 12 upward to prevent water leakage from the joint surface 1b of the split portion 1. The connection mechanism R for this functions. In addition, as long as the position of the second inserted portion 7 is fixed, it is not limited to the pressing nut 93 and the positioning nut 94, and a welding piece or the like integrated with the connecting bolt Ra may be used.

The connecting mechanism R has a connecting bolt Ra. With the pressing nut 93 positioned by the positioning nut 94, the connecting bolt Ra is tightened, and the first clamping member 10A and the second clamping member 10B are moved closer to each other, thereby applying a pressing force to the divided portion 1 of the repair valve case X. is doing. Further, as described above, the first fastening mechanism Ka is configured by screwing the proximity nut 91 and the position adjustment nut 92 onto the coupling bolt Ra of the coupling mechanism R, and the second fastening mechanism Kb is configured by screwing the coupling mechanism R A pressing nut 93 and a positioning nut 94 are screwed to the male threaded portion Ra2 of the connecting bolt Ra. That is, the connecting bolt Ra of the connecting mechanism R in the present embodiment is also used as the fastening mechanisms Ka and Kb, and the connecting bolt Ra is used to pull the first insertion portion 5 and the first inserted portion 6 together, and It is possible to draw the second inserted portion 7 and the second inserted portion 8 and to move the holding members 10A and 10B closer to each other.

As shown in FIG. 10 , the spacing member 9 is an elastic member that is engaged across the pressing portion 6B of the first inserted portion 6 and the pressing portion 7B of the second inserted portion 7 . When the clamping members 10A and 10B connected by the connecting bolt Ra are attached, the compressive force of the spacing member 9 causes the position adjusting nut 92 to press the outer surface 6a of the first inserted portion 6 until the first cover is pressed. The insertion portion 6 is pulled, and the second insertion portion 7 is pulled until the pressing nut 93 presses the outer surface 7a of the second insertion portion 7 . As a result, the distance between the pressing portion 6B of the first inserted portion 6 and the pressing portion 7B of the second inserted portion 7 is maintained. As a result, the distance between the pressing portion 5C of the first insertion portion 5 and the pressing portion 6B of the first inserted portion 6 is maintained, so that the second flange portion 11a, Ta faces the outer side surfaces 1a of the flange portions 11a and Ta. Pressing portions 5C and 6B of one clamping member 10A can be inserted. Further, by maintaining the distance between the pressing portion 7B of the second inserted portion 7 and the pressing portion 8C of the second insertion portion 8, the second insertion portion 7B is arranged to face the outer side surfaces 1a of both the flange portions Va and 12a. The pressing portions 7B and 8C of the holding member 10B can be inserted.

Next, a method for attaching the reinforcing jig P will be described with reference to FIGS. 11 to 13. FIG.

As shown in FIG. 11, the externally threaded portion Ra2 of the connecting bolt Ra in which the position adjusting nut 92, pressing nut 93 and positioning nut 94 are screwed is inserted into the internally threaded portion 8f of the second insertion portion 8 of the second clamping member 10B. Temporarily fasten by screwing. Further, while the pressing nut 93 is pressing the outer surface 7a of the second inserted portion 7, the pressing nut 93 is fixed by the positioning nut 94 so as not to move. Then, the first clamping member 10A is inserted into the male threaded portion Ra2 of the connecting bolt Ra, and the proximity nut 91 is screwed. At this time, the distance between the pressing portion 5C of the first insertion portion 5 and the pressing portion 7B of the second inserted portion 7 is greater than or equal to the distance between the connection flange portion 11a and the valve body flange portion Va. is separated from the outer surface 5a of the first insertion portion 5. Then, the interval retaining member 9 is mounted across the pressing portion 6B of the first inserted portion 6 and the pressing portion 7B of the second inserted portion 7. As shown in FIG. At this time, the position adjusting nut 92 presses the outer surface 6a of the first insertion portion 6, thereby maintaining the distance between the pressing portion 5C of the first insertion portion 5 and the pressing portion 6B of the first insertion portion 6. , the pressing nut 93 presses the outer surface 7a of the second insertion portion 7, thereby maintaining the distance between the pressing portion 7B of the second insertion portion 7 and the pressing portion 8C of the second insertion portion 8. As shown in FIG. In this way, the first clamping member 10A and the second clamping member 10B in a state in which the connecting mechanism R, the first fastening mechanism Ka and the second fastening mechanism Kb are temporarily fixed are connected to both flange portions 11a and Ta and both flange portions 11a and 11a, respectively. It is closely moved to a position facing the portion Va, 12a (first step).

Next, while the pressing portion 7B of the second inserted portion 7 is in contact with the outer side surface 1a of the valve body flange portion Va, the pressing portion 5C of the first insertion portion 5 is brought into contact with the outer side surface 1a of the connecting flange portion 11a. contact (second step). When the pressing portion 5C of the first insertion portion 5 is brought into contact with the outer side surface 1a of the connection flange portion 11a, the position of the pressing portion 5C of the first insertion portion 5 is adjusted while moving upward. Next, as shown in FIG. 12, by tightening the connecting bolt Ra in a state in which the pressing nut 93 is pressing the outer surface 1a of the second inserted portion 7, the male threaded portion Ra2 of the connecting bolt Ra is inserted in the second direction. The second inserting portion 8 is drawn and fixed to the second inserted portion 7 by screwing it into the female threaded portion 8f of the portion 8 (third step). At this time, by tightening the head Ra1 of the connecting bolt Ra using a tool (not shown) such as a ratchet wrench or a spanner, the second insertion portion 8 moves upward, and the outer surface 1a of the branch flange portion 12a has a second insertion portion 8a. Since an upward force acts from the pressing portion 8C of the second insertion portion 8, the first holding member 10A and the second holding member 10B move closer to each other. As a result, it is possible to prevent water leakage from the joint surface 1b of both the flange portions Va and 12a and prevent water leakage from the joint surface 1b of the divided portion 1. FIG. As described above, in the present embodiment, by tightening the head Ra1 of the connecting bolt Ra using a tool that can be operated from above, the function of the connecting mechanism R and the function of the second fastening mechanism Kb can be performed at the same time. Even if the clearance between the repair valve case X and the manhole (not shown) accommodating the repair valve case X is small, the manhole does not need to be demolished, which is efficient. Moreover, even if the distance between the first holding member 10A and the second holding member 10B is long, there is no need to change the dimensions of the first holding member 10A or the second holding member 10B, and only the dimensions of the connecting bolt Ra can be changed. You should change it. Therefore, the manufacturing cost can be saved without increasing the size of the reinforcing jig P.

Next, as shown in FIG. 13, the position adjusting nut 92 that presses the outer surface 6a of the first inserted portion 6 is manually rotated from above to move the pressing portion 6B of the first inserted portion 6 to the short pipe flange portion. It is brought into contact with the outer surface 1a of Ta (fourth step). Rotating operation of the position adjusting nut 92 can be easily performed by inserting a hand from the upper part of the manhole. Next, the proximity nut 91 is tightened using a tool (not shown) such as a ratchet wrench or a spanner to draw and fix the first insertion portion 5 to the first insertion portion 6 (fifth step, see FIG. 8). At this time, by tightening the proximity nut 91 using a tool, the first insertion portion 5 moves downward, and a downward force is applied to the outer surface 1a of the connection flange portion 11a from the pressing portion 5C of the first insertion portion 5. As a result, the first clamping member 10A and the second clamping member 10B move closer to each other, and a force acts in the direction of closing the divided portion 1. As shown in FIG. As a result, it is possible to prevent water leakage from the joint surface 1b of both the flange portions Va and 12a and prevent water leakage from the joint surface 1b of the divided portion 1. FIG. In this embodiment, by tightening the proximity nut 91 screwed onto the male threaded portion Ra2 of the connecting bolt Ra using a tool that can be operated from above, the first fastening mechanism Ka can be made to function. The manhole does not need to be demolished even if the gap between it and the manhole is small.

As described above, in the present embodiment, since the connecting bolt Ra of the connecting mechanism R is also used for the first fastening mechanism Ka and the second fastening mechanism Kb, the first fastening mechanism Ka and the second fastening mechanism Kb are drawn and fixed. There is no need to provide bolts separately, the number of parts can be saved, the manufacturing cost can be saved, and the reinforcing jig P can be configured compactly.

Further, the insertion direction of the first insertion portion 5 of the first holding member 10A into the first insertion portion 6 and the insertion direction of the second insertion portion 8 into the second insertion portion 7 of the second holding member 10B are determined by the connection mechanism R. Since the direction of movement of the first clamping member 10A and the second clamping member 10B is the same as the direction of movement of the first clamping member 10A and the second clamping member 10B, the work in the same direction increases, and even if the gap between the manhole and the repair valve case X is small, the manhole can be closed. No need to tear down.

Moreover, in this embodiment, the first clamping member 10A is above the second clamping member 10B, the first inserting portion 5 is above the first inserted portion 6, and the second inserted portion 7 is above the first inserting portion 6. It is located above the second insertion section 8 . With this arrangement, the connection mechanism R and the second fastening mechanism Kb can be operated by rotating the connecting bolt Ra from above with a tool, and the first fastening mechanism can be operated by rotating the proximity nut 91 from above with a tool. It is possible to make the mechanism Ka function. That is, since the connecting mechanism R, the first fastening mechanism Ka, and the second fastening mechanism Kb can all be operated from above, the gap between the repair valve case X and the manhole housing the repair valve case X is narrow. Even in this case, the reinforcing jig P can be attached. Therefore, it is not necessary to demolish the manhole when mounting the reinforcing jig P, and the working efficiency can be improved.

Note that the first holding member 10A may be configured such that the first inserted portion 6 is located above the first inserted portion 5 . In this configuration, the first inserted portion 6 and the first inserted portion 5 are pulled together by tightening the proximity nut 91 . Even in this case, the effects of the above-described embodiment can be obtained.

Only the configuration of the reinforcing jig P according to another embodiment, which is different from that of the embodiment described above, will be described below. In addition, in order to facilitate understanding of the drawings, description will be made using the same member names and reference numerals as in the above-described embodiment.

[Another embodiment 1]
As shown in FIG. 14, the second holding member 10B may have the same configuration as the first holding member 10A. In this case, the second holding member 10B is in a state in which the first holding member 10A is turned upside down. That is, the second holding member 10B has two pressing portions 6B for pressing the region between two nuts 42b adjacent in the circumferential direction on the outer surface 1a of the valve body flange portion Va of the valve body V. The insertion portion 6 and the first insertion portion 5 having two pressing portions 5C for pressing the region between the heads of two bolts 42a adjacent in the circumferential direction on the outer surface 1a of the branch flange portion 12a of the branch pipe 12. and has. Also, the second fastening mechanism Kb has a connecting bolt Ra, a proximity nut 91 and a position adjusting nut 92 . In addition, although the connecting bolt Ra in the present embodiment employs a cut bolt, a bolt having a head may be employed.

In this embodiment, when using a tool to tighten the proximity nut 91 of the second holding member 10B screwed to the male threaded portion Ra2 of the connecting bolt Ra, it is necessary to operate from the side. There is no problem if there is enough space between

[Another embodiment 2]
As shown in FIG. 15, the second holding member 10B may be arranged above the first holding member 10A. In this case, the second inserted portion 8 is above the second inserted portion 7, the first inserted portion 6 is above the first inserted portion 5, and the head Ra1 of the connecting bolt Ra is the lowest. It is in. That is, the first clamping member 10A is configured such that the two bolts 42a adjacent in the circumferential direction are located on the outer surface 1a of the branch flange portion 12a (an example of the first projecting portion) of the branch pipe 12 (an example of the first cylindrical member). A first insertion portion 5 having two pressing portions 5C for pressing the region between the heads, and a valve body flange portion Va (an example of a second projecting portion) of a valve body V (an example of a second cylindrical member). A first inserted portion 6 having two pressing portions 6B for pressing a region between two nuts 42b adjacent in the circumferential direction on the outer surface 1a. The second holding member 10B includes the heads of two bolts 41a adjacent in the circumferential direction on the outer surface 1a of the short pipe flange portion Ta (an example of the third projecting portion) of the short pipe T (an example of the third cylindrical member). Outside the second insertion part 7 having two pressing parts 7B for pressing the area between the parts, and the connecting flange part 11a (an example of the fourth protruding part) of the connecting pipe 11 (an example of the fourth tubular member) A second insertion portion 8 having two pressing portions 8C for pressing a region between two nuts 41b adjacent in the circumferential direction on the side surface 1a.

In this embodiment, the male threaded portion Ra2 of the connecting bolt Ra is screwed into the female threaded portion 8f of the second insertion portion 8 to fasten the second insertion portion 8 to the second inserted portion 7 and fix it. At this time, by tightening the head Ra1 of the connecting bolt Ra using a tool, the second insertion portion 8 moves downward, and the pressing portion 8C of the second insertion portion 8 is pushed onto the outer surface 1a of the connection flange portion 11a. Since the downward force acts, the first clamping member 10A and the second clamping member 10B move closer to each other. Next, by tightening the proximity nut 91 of the first clamping member 10A screwed onto the male threaded portion Ra2 of the connecting bolt Ra using a tool, the first inserting portion 5 is drawn and fixed to the first inserted portion 6. As shown in FIG. At this time, by tightening the proximity nut 91 using a tool, the first insertion portion 5 moves upward, and an upward force is applied from the pressing portion 5C of the first insertion portion 5 to the outer surface 1a of the branch flange portion 12a. Therefore, the first clamping member 10A and the second clamping member 10B move closer to each other. As a result, water leakage from the joint surface 1b of the flange portions 11a, Ta and the flange portions Va, 12a can be prevented, and water leakage from the joint surface 1b of the divided portion 1 can be prevented.

In this case, when using a tool to tighten the proximity nut 91 screwed to the male threaded portion Ra2 of the connecting bolt Ra or the head Ra1 of the connecting bolt Ra, it is necessary to operate from the side or below. There is no problem if there is enough space between and manhole.

[Other embodiments]
(1) The connecting bolt Ra is not limited to the head Ra1 that is recessed radially inward from the male threaded portion Ra2, and may have a head Ra1 that protrudes radially outwardly from the male threaded portion Ra2.
(2) The holding members 10A and 10B may be arranged such that the bolts 41a and 42a or the nuts 41b and 42b are arranged between the two pressing portions 5C, 6B, 7B and 8C. That is, two pressing portions 5C, 6B, 7B, 8C are arranged on both sides of the bolts 41a, 42a or the nuts 41b, 42b.
(3) The pressing portions 5C, 6B, 7B, and 8C of the holding members 10A and 10B are not limited to those formed in a bifurcated shape, and may be composed of a single pressing portion.
(4) The reinforcing jig P is not limited to use in the repair valve case X, and may be attached to joints between pipes that do not have the divided portion 1, between fluid devices, or between a fluid device and a pipe. It can be used to prevent water leakage from any joint. Further, the reinforcing jig P is not limited to being used for preventing water leakage from the joint, and may be used for preventing other liquids or gases from leaking from the joint.

INDUSTRIAL APPLICABILITY The present invention can be used for a flange reinforcing jig for reinforcing both projecting portions projecting radially outward of both cylindrical members, and a mounting method thereof.

1a: outer surface 5: first insertion portion 5C: pressing portion 6: first insertion portion 6B: pressing portion 7: second insertion portion 7B: pressing portion 8: second insertion portion 9: spacing member 10A: second One clamping member 10B: Second clamping member 11: Connection pipe (first cylindrical member)
11a: Connection flange portion (first projecting portion)
12: branch pipe (fourth cylindrical member)
12a: Branch flange portion (fourth projecting portion)
91: proximity nut 92: position adjustment nut 93: pressing nut Ka: first fastening mechanism Kb: second fastening mechanism P: reinforcement jig (flange reinforcement jig)
R: Connecting Mechanism Ra: Connecting Bolt T: Short Pipe (Second Cylindrical Member)
Ta: Short pipe flange (second projecting portion)
V: valve body (third cylindrical member)
Va: Valve body flange (third protrusion)

Claims (7)

A first projecting portion projecting radially outward from an end portion of the first tubular member and a second projecting portion projecting radially outwardly from an end portion of the second tubular member and facing the first projecting portion are sandwiched. a first clamping member;
a first fastening mechanism that fastens the first holding member;
A third projecting portion projecting radially outward from an end portion of the third tubular member and a fourth projecting portion projecting radially outwardly from an end portion of the fourth tubular member and facing the third projecting portion are sandwiched. a second clamping member;
a second fastening mechanism that fastens the second holding member;
a connecting mechanism that applies a force in the direction of approaching the first holding member and the second holding member,
The connecting mechanism has a connecting bolt, and the connecting bolt is also used as the first fastening mechanism and the second fastening mechanism. The first holding member has a first insertion portion and a first inserted portion that receives the first insertion portion along the approaching direction,
2. The flange reinforcing jig according to claim 1, wherein said second holding member has a second insertion portion and a second inserted portion for receiving said second insertion portion along said approaching direction. The second fastening mechanism has a female threaded portion that is formed in the second insertion portion and is screwed to the connection bolt, and a press nut that presses the outer surface of the second inserted portion,
3. The flange reinforcing jig according to claim 2, wherein the second fastening mechanism draws and fixes the second inserting portion to the second inserted portion by screwing the connecting bolt into the female threaded portion and tightening it. The first fastening mechanism includes a position adjustment nut that presses the outer surface of the first inserted portion to adjust the relative position of the first inserted portion with respect to the first inserted portion, and the outer surface of the first inserted portion. a proximity nut that presses in the proximity direction;
The first fastening mechanism draws the first insertion portion toward the first insertion portion by screwing and tightening the proximity nut on the connection bolt in a state in which the relative position is adjusted by the position adjustment nut. 4. The flange reinforcing jig according to claim 3, which is fixed. The first clamping member is above the second clamping member in the vertical direction,
5. The flange reinforcing jig according to claim 4, wherein the first insertion portion is above the first insertion portion in the vertical direction, and the second insertion portion is above the second insertion portion in the vertical direction. equipment. The pressing portion of the first inserted portion that presses the outer surface of the second protruding portion and the pressing portion of the second inserted portion that presses the outer surface of the third protruding portion are locked. 6. The flange reinforcing jig according to claim 5, further comprising a gap holding member that holds a gap between the pressing portion of the first inserted portion and the pressing portion of the second inserted portion. A method for attaching a flange reinforcing jig according to claim 5 or 6,
The first clamping member and the second clamping member in a state where the connecting mechanism, the first fastening mechanism and the second fastening mechanism are temporarily fixed are separated from the first projecting portion and the second projecting portion and the second clamping member. a first step of moving closer to the third projecting portion and the fourth projecting portion;
a second step of bringing the pressing portion of the first insertion portion into contact with the outer side surface of the first protruding portion and bringing the pressing portion of the second inserted portion into contact with the outer side surface of the third protruding portion;
a third step of drawing and fixing the second insertion portion to the second insertion portion by tightening the connection bolt while the pressing nut is pressing the outer surface of the second insertion portion;
a fourth step of rotating the position adjusting nut to bring the pressing portion of the first inserted portion into contact with the outer surface of the second protruding portion;
and a fifth step of drawing and fixing the first insertion portion to the first insertion portion by tightening the proximity nut.

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