JP2020034042A - Flange reinforcement jig and attachment method of the same - Google Patents

Abstract

To provide a flange reinforcement jig which reinforces protruding parts, protruding in a radial outward direction, of both cylindrical members, enables reinforcement of a valve case split part, and achieves high work efficiency.SOLUTION: A flange reinforcement jig includes: a first sandwiching member 10A; a first fastening mechanism Ka which fastens the first sandwiching member 10A; a second sandwiching member 10B; a second fastening mechanism Kb which fastens the second sandwiching member 10B; and coupling mechanisms R, each of which applies a force acting in an approaching direction in which the first sandwiching member 10A and the second sandwiching member 10B are moved closer to each other. The coupling mechanism R has a coupling bolt Ra. The coupling bolt Ra is also used in the first fastening mechanism Ka and the second fastening mechanism Kb.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a flange reinforcing jig that reinforces both protruding portions of two cylindrical members that protrude outward in a radial direction, and a method of mounting the same.

  Conventionally, a valve case (repair valve case) is composed of a short pipe (tubular member) and a valve box (cylindrical member), and a first protrusion protruding radially outward from an end of the short pipe and a valve box 2. Description of the Related Art There is known a reinforcing jig to be attached to a divided portion in which a second projecting portion projecting radially outward from an end portion is joined by a bolt (for example, see Patent Document 1).

  The reinforcing jig of Patent Literature 1 includes a holding member for holding the first projecting portion and the second projecting portion, and a fastening mechanism for pulling and holding the holding member in the joining direction of the divided portions, and these holding members are provided with the first and second holding members. It has two pressing portions for pressing the regions on both sides along the circumferential direction of the head of the bolt on the outer surface of the one protruding portion. With this configuration, even when the bolt is deteriorated due to aging of the repair valve, the periphery of the bolt at the divided portion is reinforced by the reinforcing jig, and water leakage from the gap of the divided portion can be prevented. You can do it. In particular, since the reinforcing jig of Patent Literature 1 presses the regions on both sides of the head of the bolt, it can be mounted even when the space in the radially inward direction is narrower than the bolt like a repair valve case. Is possible and the convenience is high.

JP 2016-23659 A

  By the way, there are various shapes of the repair valve case having the divided portion. For example, there are a repair valve case in which the first protrusion and the second protrusion have a small protrusion amount, and a repair valve case in which the outer peripheral surface of the short pipe is formed continuously and does not have the first protrusion. When the reinforcing jig of Patent Literature 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, and thus the reinforcement around the bolt becomes insufficient. In addition, the reinforcing jig may fall off.

  In the case of a repair valve case in which the outer peripheral surface of the short pipe is formed continuously and does not have the first protrusion, the flange protruding from the end of the connection pipe or the like of the air valve case connected to the upper end of the short pipe and the second Since a reinforcing jig that draws and fixes a long distance between the two protruding portions is required, the overall size of the reinforcing jig increases, and the reinforcing jig becomes larger as a whole. In addition, since it is difficult to attach the reinforcing jig to a portion of the valve box where the operation portion protrudes, a desired detachment prevention force may not be exhibited. As described above, in all repair valves having various shapes, it is difficult to cope with the conventional reinforcing jig, and there is room for improvement.

  Therefore, there is a need for a flange-reinforcing jig with high working efficiency, which can reinforce both projecting portions of the two cylindrical members projecting in the radially outward direction and reinforce the valve case divided portion, and a method of mounting the same.

  The characteristic configuration of the flange reinforcing jig according to the present invention includes a first protruding portion protruding radially outward from an end of the first cylindrical member and a first protruding radially protruding from an end of the second cylindrical member. A first clamping member for clamping the second projection facing the projection, a first fastening mechanism for fastening the first clamping member, and a third projection projecting radially outward from an end of the third tubular member. A second clamping member for clamping the projecting portion and a fourth projecting portion projecting radially outward from an end of the fourth cylindrical member and facing the third projecting portion; and a second fastening for fastening the second clamping member. Mechanism, and a connection mechanism for applying a force in the proximity direction for bringing the first holding member and the second holding member close to each other, wherein the connection mechanism has a connection bolt, and the connection bolt is the It is also used as one fastening mechanism and the second fastening mechanism.

  The flange reinforcing jig of the present configuration includes a coupling mechanism that brings the first holding member and the second holding member that hold both the projecting portions of both the tubular members close to each other. This not only reinforces both protruding portions of both tubular members, but also connects the second tubular member and the third tubular member when they are constituted by the short pipe of the repair valve and the valve box. By bringing the first holding member and the second holding member close to each other by the mechanism, the valve case divided portion can also be reinforced. Moreover, even when the distance between the first holding member and the second holding member is large, only the dimensions of the coupling mechanism need to be changed, and there is no need to change the dimensions of the first holding member and the second holding member. Therefore, the manufacturing cost can be reduced without increasing the size of the flange reinforcing jig.

  Further, in this configuration, if the connection bolt of the connection mechanism is used for both the first fastening mechanism for fastening the first holding member and the second fastening mechanism for fastening the second holding member, the first fastening mechanism and the second fastening mechanism can be used. Since the installation space for the bolts used in the mechanism is not required separately, the number of parts can be reduced, the manufacturing cost can be reduced, and the flange reinforcing jig can be made compact.

  As described above, a flange-retaining jig with high working efficiency that can reinforce the two projecting portions of the two cylindrical members that protrude in the radially outward direction and reinforce the valve case divided portion can be provided.

  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 approach direction, and the second holding member is a second insertion member. It has two insertion parts and a second inserted part which receives the second insertion part along the approaching direction.

  As in the present configuration, if both the first holding member and the second holding member are constituted by the insertion portion and the inserted portion that receives the insertion portion along the approach direction, the first holding member and the second holding member can be arranged in the axial direction (approach direction) of the tubular member. Since the number of operations increases, the operation efficiency can be improved.

  Another characteristic configuration is that the second fastening mechanism includes a female screw portion formed in the second inserted portion and screwed to the connection bolt, and a pressing nut for pressing an outer surface of the second inserted portion. The second fastening mechanism is characterized in that the second insertion portion is pulled and fixed to the second inserted portion by screwing the connection bolt to the female screw portion and tightening.

  According to this configuration, the work efficiency is high because the second insertion portion can be pulled and fixed to the second insertion portion by performing a tightening operation on the connection bolt that is to be worked in the axial direction (approach direction) of the tubular member.

  Another characteristic configuration is that the first fastening mechanism presses an outer surface of the first inserted portion to adjust a relative position of the first inserted portion with respect to the first insertion portion; A proximity nut that presses the outer surface of the one insertion portion in the proximity direction, wherein the first fastening mechanism is configured such that the proximity nut is attached to the connection bolt in a state where the relative position is adjusted by the position adjustment nut. The first insertion part is drawn and fixed to the first insertion part by screwing and tightening.

  In this configuration, the work efficiency is high because the first insertion portion is pulled and fixed to the first insertion portion simply by tightening the proximity nut.

  Another characteristic configuration is that the first holding member is vertically above the second holding member, the first insertion portion is vertically above the first inserted portion, and the second insertion member is The point to be inserted is located vertically above the second insertion section.

  As in this configuration, since the first holding member is above the second holding member, and the first insertion portion where the proximity nut contacts the outer surface is above the first insertion portion, the proximity nut is moved from above. By rotating, the first fastening mechanism can function, and by rotating the connecting bolt from above, the connecting mechanism and the second fastening mechanism can function. That is, since the coupling mechanism, the first fastening mechanism, and the second fastening mechanism can all be operated from the upper side, even when the gap between the manhole containing the tubular member and the tubular member is narrow, the tool is placed on the upper side. Can be operated from Therefore, it is not necessary to tear down the manhole when mounting the flange reinforcing jig, and the working efficiency can be improved.

  Another characteristic configuration includes 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 is characterized in that a spacing member is further provided, the spacing member being held over the gap, and maintaining a gap between the pressing portion of the first inserted portion and the pressing portion of the second inserted portion.

  As in the present configuration, if a space holding member is provided across the pressing portion of the first inserted portion and the pressing portion of the second inserted portion, the downward movement of which is regulated by the position adjustment nut, The two inserted parts do not descend by their own weight, and the distance between the second inserted part and the second inserted part does not become smaller than the thickness of the third protruding part and the fourth protruding part. As a result, if the flange reinforcing jig is inserted from above, the pressing portion of the second inserted portion and the pressing portion of the second inserted portion can be opposed to the outer surfaces of the third protruding portion and the fourth protruding portion. . Therefore, even when the gap between the manhole containing the tubular member and the tubular member is narrow, the manhole does not need to be broken when the flange reinforcing jig is inserted, and the working efficiency can be improved.

  The characteristic configuration of the mounting method of the flange reinforcing jig according to the present invention includes the first holding member and the second holding member in a state where the connection mechanism, the first fastening mechanism, and the second fastening mechanism are temporarily fixed. A first step of moving the first protruding portion and the second protruding portion close to the third protruding portion and the fourth protruding portion, and pressing the pressing portion of the first insertion portion to the first protruding portion. A second step of making the pressing portion of the second inserted portion come into contact with the outer surface of the third projecting portion while making contact with the outer side surface, and the pressing nut presses the outer surface of the second inserted portion. In the state, the third step of tightening the connection bolt to draw and fix the second insertion portion to the second inserted portion, and rotating the position adjusting nut to press the pressing portion of the first inserted portion A fourth step of contacting the outer surface of the second protrusion, and the proximity nut Tightening is the first insertion portion in that and a fifth step of fixing attracted to the first insertion member.

  In this method, since the mounting operation is performed in a state where the first holding member and the second holding member are integrated by the connection mechanism, the working efficiency can be improved as compared with a case where each is mounted individually. Further, since the second holding member is fastened by tightening the connection bolt and the first holding member is fastened by tightening the proximity nut, the flange reinforcing jig can be quickly attached. Moreover, since the connection mechanism, the first fastening mechanism and the second fastening mechanism can be operated by operating all of the connection bolts and the proximity nuts from the upper side, the manhole and the cylindrical member accommodating the cylindrical member can be used. The tool can be operated from the upper side even when the interval between is small. Therefore, it is not necessary to tear down the manhole when mounting the flange reinforcing jig, and the working efficiency can be improved.

It is a perspective view of a cylindrical member. It is a top view of a division part. It is an expanded longitudinal cross-sectional view of a cylindrical member. It is a figure showing the schematic structure of the inserted part of the 1st pinching member. It is a figure showing the schematic structure of the insertion part of the 1st pinching member. It is a figure which shows the schematic structure of the to-be-inserted part of a 2nd holding member. It is a figure which shows the schematic structure of the insertion part of a 2nd holding member. It is a perspective view showing the state where the flange reinforcement jig was attached to the projected part of the cylindrical member. It is a top view showing the state where the flange reinforcement jig was attached to the projected part of the cylindrical member. FIG. 10 is a view taken in the direction of arrows XX in FIG. 9. It is a figure which shows the 1st process-the 2nd process of the mounting method of a flange fixing jig. It is a figure which shows the 3rd process of the mounting method of a flange fixing jig. It is a figure which shows the 4th process-5th process of the mounting method of a flange fixing jig. It is a longitudinal section of the flange reinforcement jig concerning other embodiment 1. It is a longitudinal section of the flange reinforcement jig concerning other embodiment 2.

  An embodiment of a flange reinforcing jig and a method of mounting the flange reinforcing jig according to the present invention will be described below with reference to the drawings. However, without being limited to the following embodiments, various modifications can be made without departing from the scope of the invention.

  In this embodiment, the flange portions 11a and Va and the flange portions Ta and 12a are reinforced by using a flange reinforcing jig (hereinafter, referred to as a "reinforcing jig P"), and the valve box V and the short pipe are connected. A case in which water is prevented from being leaked 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 composed of T and T will be described.

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

  The 1st division part 1A and the 2nd division part 1B are formed in planar view rectangular shape. An operation unit 10 that can rotate a ball valve body Vb, which will be described later, is connected to the first division 1A and the second division 1B.

  As shown in FIGS. 2 and 3, a plurality of (four in this embodiment) through holes 3 a penetrating in the joining direction (axial direction) are formed in the first divided portion 1 </ b> A so as to be spaced apart in the circumferential direction. ing. In the second divided portion 1B, a plurality of holes 3b (four locations in the present embodiment) whose opposite side to the joining surface 1b is closed are formed in the circumferential direction so as to be separated from each other. A female screw 3c is formed on the inner peripheral surface of each hole 3b, and the male screw 4b is screwed into the female screw 3c so that the bolt 4 does not protrude from the outer surface 1a of the second divided portion 1B. The division part 1A and the second division part 1B are joined. That is, the head 4a of the bolt 4 is exposed on the outer surface 1a of the first divided portion 1A, and the outer surface 1a of the second divided portion 1B is formed of a flat surface from which the bolt 4 does not project. Although the bolt 4 in the present embodiment is an example of a bolt having a head 4a, a configuration in which both screw bolts are tightened with nuts may be used.

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

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

  Hereinafter, in the connection flange portion 11a, the short pipe flange portion Ta, the first divided portion 1A, the second divided portion 1B, the valve box flange portion Va, and the branch flange portion 12a shown in FIG. 1 and FIG. The surfaces facing each other in the joining direction (hereinafter, referred to as the “axis direction”) at this time are referred to as a joining surface 1b, and the outer surface parallel to the joining surface 1b and perpendicular to the axis direction is referred to as an outer surface 1a. explain. Also, the vertical direction is described as the upper side and the lower side, and the direction of gravity is the lower side.

(Basic configuration of reinforcement jig)
As shown in FIG. 8, the reinforcing jig P includes a first holding member 10A and a second holding member 10B made of cast iron, which are mounted on the two flange portions 11a and Ta and the two flange portions Va and 12a, and a first holding member. And a connection mechanism R for applying a force in the approach direction for bringing the second holding member 10B and the second holding member 10B closer to each other. Further, the reinforcing jig P includes an interval holding member 9 for maintaining an interval between the first holding member 10A and the second holding member 10B.

  As shown in FIGS. 8 to 10, the first holding member 10 </ b> A has two pressing portions that press the area between two circumferentially adjacent nuts 41 b on the outer surface 1 a of the connection flange portion 11 a of the connection pipe 11. Pressing portion 6B that presses a region between the heads of two bolts 41a adjacent to each other in the circumferential direction on the first insertion portion 5 having the portion 5C and the outer surface 1a of the short tube flange portion Ta of the short tube T. And a first inserted portion 6 having the following. Further, the first insertion portion 5 and the first inserted portion 6 are pulled (closed) to the connection direction of the connection flange portion 11a of the connection tube 11 and the short tube flange portion Ta of the short tube T, and are tightened and fixed. A first fastening mechanism Ka is provided. The connection bolt Ra of the connection mechanism R 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 has a rectangular cylindrical portion 5A and a flange extending outward from the outer surface 5a of the rectangular cylindrical portion 5A over the entire circumference. And a pressing portion 5C extending further outward from one of the four sides of the flange portion 5B. The rectangular tube portion 5A has a trapezoidal shape whose diameter increases as the outer surface 5a approaches the connection flange portion 11a in a cross-sectional view, and the inner surface 5b is formed in a circular bottomed rectangular tube shape.

  The inner surface 5b of the square tube portion 5A can be inserted without a male screw portion Ra2 of a connection bolt Ra of the connection mechanism R described later being screwed. The flange portion 5B is formed in a trapezoidal shape in a cross-sectional view perpendicular to the joining direction, and the rectangular tube portion 5A extends from the central portion. The pressing portion 5C is formed in a forked shape having the same arm length in plan view. In addition, the tip portion of the pressing portion 5C on the side of the rectangular tube portion 5A is formed as a flat pressing surface 5e.

  As shown in FIGS. 4 and 10, the first inserted portion 6 is formed of a metal member, and has a rectangular cylindrical portion 6A and a pressing portion extending further outward from one of four sides of the rectangular cylindrical portion 6A. And a portion 6B. The square tube portion 6A is formed in a bottomed square tube shape having a trapezoidal shape whose outer surface 6a and inner surface 6b increase in diameter as approaching the short tube flange portion Ta in a cross-sectional view (a cross-sectional view perpendicular to the joining direction). ing. Further, the pressing portion 6B is formed to extend in a forked shape from one of the four sides of the outer surface 6a of the rectangular cylindrical portion 6A toward the outside.

  The square tube portion 6A is formed so as to protrude radially inward at both ends along the circumferential direction of the inner surface (outer surface 6a) facing the outer peripheral surfaces of both flange portions 11a and Ta, and abuts on both flange portions 11a and Ta. It has a contactable portion 6h. When the first insertion portion 5 and the first inserted portion 6 are fixed by the first fastening mechanism Ka, the rotation of the first holding member 10A is prevented by the contact portions 6h abutting on the flange portions 11a and Ta. Is done.

  Inside the square tube portion 6A, a cylindrical internal space 6c for receiving the square tube portion 5A of the first insertion portion 5 is formed along the joining direction of the two flange portions 11a and Ta. The tubular internal space 6c is formed in a trapezoidal shape in a cross-sectional view, and is formed slightly larger than the outer diameter of the square tubular portion 5A of the first insertion portion 5 having a trapezoidal cross-sectional shape. For this reason, the cross-sectional shape perpendicular to the joining direction of the outer surface 5a of the square tube portion 5A of the first insertion portion 5 and the inner surface 6b of the square tube portion 6A of the first inserted portion 6 is such that the first insertion portion 5 is the first insertion portion. 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 rotation is impossible.

  In the cylindrical internal 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 internal space 6c where the pressing portion 6B is formed, an insertion hole 6d that can be inserted without a male screw portion Ra2 of a connection bolt Ra of the connection mechanism R described later being screwed into the bottom of the square cylindrical portion 5A. An opening is formed so as to penetrate.

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

  As shown in FIG. 10, the first fastening mechanism Ka has a connection bolt Ra, a proximity nut 91, and a position adjustment nut 92. With the pressing portion 5C of the first insertion portion 5 being in contact with the outer surface 1a of the connection flange portion 11a of the connection pipe 11, the position adjusting nut 92 that is in contact with the outer surface 6a of the first insertion portion 6 is connected to the connection bolt Ra. , The pressing portion 6B of the first inserted portion 6 comes into contact with the outer surface 1a of the short tube flange portion Ta of the short tube T, and the first inserted portion of the first inserted portion 6 is screwed. The position relative to 5 is adjusted. Then, by tightening the proximity nut 91, the first insertion portion 5 and the first inserted portion 6 are pulled in the joining direction of the two flange portions 11a and Ta and fastened and fixed. Thereby, while the 1st fastening mechanism Ka functions, the press part 5C of the 1st insertion part 5 presses the connection flange part 11a of the connection pipe 11 downward, and prevents the water leak from the joining surface 1b of the division part 1. The connection mechanism R for the connection functions.

  As shown in FIG. 8 and FIG. 10, the second holding member 10 </ b> B presses a region between two circumferentially adjacent nuts 42 b on the outer surface 1 a of the valve box flange portion Va of the valve box V. It has a second inserted portion 7 having a pressing portion 7B and two pressing portions 8C for pressing a region between two bolts 42a adjacent in the circumferential direction on the outer surface 1a of the branch flange portion 12a of the branch pipe 12. A second insertion portion 8. Further, the second inserted portion 7 and the second inserted portion 8 are pulled toward (close to) the joining direction of the valve housing flange portion Va of the valve housing V and the branch flange portion 12a of the branch pipe 12, and are tightened and fixed. A second fastening mechanism Kb is provided. As the second fastening mechanism Kb in the present embodiment, a connecting bolt Ra of a connecting mechanism R described later is also used.

  As shown in FIGS. 6 and 10, the second inserted portion 7 is made of a metal member, and integrally includes a rectangular tube portion 7A and a pressing portion 7B. The square tube portion 7A is formed in a trapezoidal bottomed square tube shape having a trapezoidal shape whose outer surface 7a and inner surface 7b increase in diameter as approaching the valve box flange portion Va in a cross-sectional view (a cross-sectional view perpendicular to the joining direction). ing. The pressing portion 7B is formed so as to extend in a forked shape from one of the four sides of the outer surface 7a of the rectangular tube portion 7A toward the outer side.

  The rectangular tube portion 7A is formed to protrude radially inward at both ends along the circumferential direction of the inner surface (outer surface 7a) facing the outer peripheral surfaces of both flange portions Va, 12a, and is formed to contact both flange portions Va, 12a. It has a pair of contact portions 7h that can be contacted. When the second inserted portion 7 and the second inserted portion 8 are fixed by the second fastening mechanism Kb, the rotation of the second holding member 10B is prevented by the abutting portion 7h abutting on both the flange portions Va and 12a. Is done.

  Inside the square tube portion 7A, a cylindrical internal space 7c for receiving a square tube portion 8A of the second insertion portion 8 described later is formed along the joining direction of the two flange portions Va and 12a. The tubular internal space 7c is formed in a trapezoidal shape in a cross-sectional view, and is formed slightly larger than the outer diameter of the trapezoidal rectangular tube portion 8A. For this reason, the cross-sectional shape perpendicular to the joining direction of 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 such that the second insertion portion 8 is 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 rotation is impossible.

  In the cylindrical internal 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 cylindrical internal space 7c where the pressing portion 7B is formed, an insertion hole 7d into which the male screw portion Ra2 of the connection bolt Ra can be inserted without being screwed is formed so as to penetrate through the bottom of the rectangular cylindrical portion 7A. Have been.

  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 moves away from the insertion hole 7d toward the distal end side. Further, a tip portion of the pressing portion 7B on the opening side of the cylindrical internal space 7c is formed as a flat pressing surface 7e.

  As shown in FIGS. 7 and 10, the second insertion portion 8 is formed of a metal member, and has a rectangular cylindrical portion 8A and a flange extending outward from the outer surface 8a of the rectangular cylindrical portion 8A over the entire circumference. And a pressing portion 8C extending further outward from one of the four sides of the flange-shaped portion 8B. The rectangular tube portion 8A has a trapezoidal shape whose outer surface 8a increases in diameter as approaching the branch flange portion 12a in a cross-sectional view, and the inner surface 8b is formed in a circular bottomed rectangular tube shape.

  On the inner surface 8b of the square tube portion 8A, a female screw portion 8f capable of screwing the male screw portion Ra2 of the connection bolt Ra is formed. The flange portion 8B is formed in a trapezoidal shape in a cross-sectional view perpendicular to the joining direction, and the rectangular tube portion 8A extends from the central portion. The pressing portion 8C is formed in a forked shape having the same arm length in plan view. In addition, the tip portion of the pressing portion 8C on the side of the rectangular tube portion 8A is formed as a flat pressing surface 8e.

  As shown in FIG. 10, the second fastening mechanism Kb has a connection bolt Ra, a pressing nut 93, and a positioning nut 94. The male screw portion Ra2 of the connection bolt Ra is screwed into the female screw portion 8f of the inner surface 8b of the square tube portion 8A of the second insertion portion 8, and the pressing nut 93 presses the outer surface 7a of the second inserted portion 7 with the positioning nut 94. In this state, the connecting bolt Ra is tightened, and the second inserted portion 7 and the second inserted portion 8 are pulled in the joining direction of the two flange portions Va and 12a to be fastened and fixed. Accordingly, 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 divided portion 1. Mechanism R for the function. 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 may be a welding piece or the like integrated with the connection bolt Ra.

  The connection mechanism R has a connection bolt Ra. With the pressing nut 93 positioned by the positioning nut 94, the connection bolt Ra is tightened, and the first holding member 10A and the second holding member 10B are moved close to each other to apply a pressing force to the divided portion 1 of the repair valve case X. are doing. Further, as described above, the first fastening mechanism Ka is configured by screwing the proximity nut 91 and the position adjusting nut 92 into the connecting bolt Ra of the connecting mechanism R, and the second fastening mechanism Kb is configured by the connecting mechanism R The pressing nut 93 and the positioning nut 94 are screwed into the male screw 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, and The pulling of the two inserted portions 7 and the second insertion portion 8 and the close movement of the holding members 10A and 10B can be executed.

  As shown in FIG. 10, the spacing member 9 is an elastic member locked over the pressing portion 6B of the first inserted portion 6 and the pressing portion 7B of the second inserted portion 7. When the two holding members 10A and 10B connected by the connection bolt Ra are mounted, the first covering member is pressed by the compression force of the spacing member 9 until the position adjusting nut 92 presses the outer surface 6a of the first receiving portion 6. 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. Thereby, the interval 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 and the outer side surface 1a of the Ta are opposed to each other. The pressing portions 5C and 6B of the one holding member 10A can be inserted. Also, 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 inserting portion 7 is opposed to the outer side surfaces 1a of the flange portions Va and 12a. The pressing portions 7B and 8C of the holding member 10B can be inserted.

  Next, a method of attaching the reinforcing jig P will be described with reference to FIGS.

  As shown in FIG. 11, the male screw portion Ra2 of the connection bolt Ra in a state where the position adjusting nut 92, the pressing nut 93, and the positioning nut 94 are screwed into the female screw portion 8f of the second insertion portion 8 of the second holding member 10B. Screw and temporarily fix. Further, in a state where the outer surface 7a of the second inserted portion 7 is pressed by the pressing nut 93, the positioning nut 94 fixes the position of the pressing nut 93 so as not to move. Then, the first holding member 10A is inserted into the male screw portion Ra2 of the connection 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 equal to or larger than the distance between the connection flange portion 11a and the valve box flange portion Va. Are separated from the outer surface 5a of the first insertion portion 5. Then, the spacing member 9 is mounted over the pressing portion 6B of the first inserted portion 6 and the pressing portion 7B of the second inserted portion 7. At this time, the gap between the pressing portion 5C of the first insertion portion 5 and the pressing portion 6B of the first insertion portion 6 is maintained by the position adjusting nut 92 pressing the outer surface 6a of the first insertion portion 6. The pressing nut 93 presses the outer surface 7a of the second inserted portion 7 to maintain the interval between the pressing portion 7B of the second inserted portion 7 and the pressing portion 8C of the second inserted portion 8. As described above, the first holding member 10A and the second holding member 10B in the state where the coupling mechanism R, the first fastening mechanism Ka, and the second fastening mechanism Kb are temporarily fixed are respectively connected to the two flange portions 11a, Ta and the two flange portions. It is moved close to the position facing the parts Va and 12a (first step).

  Next, with the pressing portion 7B of the second inserted portion 7 in contact with the outer surface 1a of the valve box flange portion Va, the pressing portion 5C of the first insertion portion 5 is brought into contact with the outer surface 1a of the connection flange portion 11a. Contact (second step). When the pressing portion 5C of the first insertion portion 5 is brought into contact with the outer surface 1a of the connection flange portion 11a, the position is adjusted while moving the pressing portion 5C of the first insertion portion 5 upward. Next, as shown in FIG. 12, by tightening the connection bolt Ra while the pressing nut 93 is pressing the outer side surface 1a of the second inserted portion 7, the male screw portion Ra2 of the connection bolt Ra is inserted into the second insertion portion Ra. The second insertion portion 8 is pulled and fixed to the second inserted portion 7 by being screwed into the female screw portion 8f of the portion 8 (third step). At this time, by tightening the head Ra1 of the connection 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 side surface 1a of the branch flange portion 12a has a second insertion portion. 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 close to each other. Thereby, it is possible to prevent water leakage from the joint surface 1b of the divided portion 1 while preventing water leakage from the joint surface 1b between the two flange portions Va and 12a. As described above, in the present embodiment, the function of the connection mechanism R and the function of the second fastening mechanism Kb can be performed simultaneously by tightening the head Ra1 of the connection bolt Ra using the tool that can be operated from the upper side. Even when the gap 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 broken down, which is efficient. Moreover, even when the distance between the first holding member 10A and the second holding member 10B is large, it is not necessary to change the dimensions of the first holding member 10A and the second holding member 10B, and only the size of the connection bolt Ra is required. Just 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 pressing the outer surface 6a of the first inserted portion 6 is manually rotated from the upper side to rotate the pressing portion 6B of the first inserted portion 6 into the short pipe flange portion. The outer surface 1a of Ta is brought into contact (fourth step). The rotation operation of the position adjusting nut 92 can be easily performed by inserting a hand from above the manhole. Next, using a tool (not shown) such as a ratchet wrench or a spanner, the proximity nut 91 is tightened to draw and fix the first insertion portion 5 to the first insertion portion 6 (fifth step, see FIG. 8). At this time, the first insertion portion 5 moves downward by tightening the proximity nut 91 using a tool, and a downward force is applied to the outer side surface 1a of the connection flange portion 11a from the pressing portion 5C of the first insertion portion 5. Therefore, the first holding member 10 </ b> A and the second holding member 10 </ b> B move close to each other, and a force in the direction to close the divided portion 1 is applied. Thereby, it is possible to prevent water leakage from the joint surface 1b of the divided portion 1 while preventing water leakage from the joint surface 1b between the two flange portions Va and 12a. In the present embodiment, the first fastening mechanism Ka can be made to function by tightening the proximity nut 91 screwed to the male screw portion Ra2 of the connection bolt Ra from the upper side, so that the repair valve case X There is no need to tear down the manhole even when the gap between the manhole and the manhole is small.

  As described above, in the present embodiment, since the connection bolt Ra of the connection mechanism R is also used as the first and second fastening mechanisms Ka and Kb, the first and second fastening mechanisms Ka and Kb are pulled and fixed. There is no need to separately provide bolts, so that the number of parts can be saved, manufacturing costs can be saved, and the reinforcing jig P can be made compact.

  The direction of insertion of the first insertion portion 5 into the first inserted portion 6 of the first holding member 10A and the direction of insertion of the second insertion portion 8 into the second inserted portion 7 of the second holding member 10B are determined by the connecting mechanism R Is in the same direction as the approaching movement direction of the first holding member 10A and the second holding member 10B, the work in the same direction increases, and even when the gap between the manhole and the repair valve case X is small, the manhole is removed. There is no need to demolish.

  Moreover, in the present embodiment, the first holding member 10A is above the second holding member 10B, the first insertion portion 5 is above the first insertion portion 6, and the second insertion portion 7 is It is above the two insertion portions 8. With this arrangement, the connecting 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 can be performed by rotating the proximity nut 91 from above with a tool. The mechanism Ka can be made to function. That is, since the coupling mechanism R, the first fastening mechanism Ka, and the second fastening mechanism Kb can all be operated from above, the distance between the manhole housing the repair valve case X and the repair valve case X is narrow. Even in this case, the reinforcing jig P can be mounted. Therefore, there is no need to tear down the manhole when mounting the reinforcing jig P, and the working efficiency can be improved.

  In the first holding member 10 </ b> A, the first inserted portion 6 may be configured to be above the first inserted portion 5. In this configuration, the first inserted portion 6 and the first inserted portion 5 are drawn by tightening the proximity nut 91. Also in this case, the operation and effect of the above-described embodiment can be obtained.

  Hereinafter, as for the reinforcing jig P according to another embodiment, only the configuration different from the above-described embodiment will be described. 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 where the first holding member 10A is turned upside down. In other words, the second holding member 10B has a first cover having two pressing portions 6B for pressing a region between two nuts 42b adjacent in the circumferential direction on the outer surface 1a of the valve box flange portion Va of the valve box V. A first insertion portion 5 having an insertion portion 6 and two pressing portions 5C for pressing an area 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 The second fastening mechanism Kb has a connection bolt Ra, a proximity nut 91, and a position adjustment nut 92. In addition, although the connection bolt Ra in the present embodiment employs a cut bolt, a bolt having a head may be employed.

  In the present embodiment, when the proximity nut 91 of the second holding member 10B screwed to the male screw portion Ra2 of the connection bolt Ra is tightened with a tool, an operation from the side is required, but the repair valve case X and the manhole There is no problem if there is enough space between them.

[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 insertion portion 8 is above the second insertion portion 7, the first insertion portion 6 is above the first insertion portion 5, and the head Ra1 of the connecting bolt Ra is the lowest. It is in. In other words, the first holding member 10A is formed 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 tubular member). A first insertion portion 5 having two pressing portions 5C for pressing an area between the head portions, and a valve box flange portion Va (an example of a second protruding portion) of a valve box V (an example of a second cylindrical member). On the outer side surface 1a, there is provided a first inserted portion 6 having two pressing portions 6B for pressing a region between two nuts 42b adjacent in the circumferential direction. The second holding member 10B is a head of two bolts 41a circumferentially adjacent to each other on the outer surface 1a of the short pipe flange Ta (an example of the third protrusion) of the short pipe T (an example of the third tubular member). The second inserted portion 7 having two pressing portions 7B for pressing the region between the portions, and the outside of the connection flange portion 11a (an example of the fourth protruding portion) of the connection pipe 11 (an example of the fourth cylindrical member). On the side surface 1a, there is provided a second insertion portion 8 having two pressing portions 8C for pressing a region between two nuts 41b adjacent in the circumferential direction.

  In the present embodiment, the male screw portion Ra2 of the connection bolt Ra is screwed into the female screw portion 8f of the second insertion portion 8 to be tightened, and the second insertion portion 8 is pulled and fixed to the second insertion portion 7. At this time, the second insertion portion 8 is moved downward by tightening the head Ra1 of the connection bolt Ra using a tool, and the outer surface 1a of the connection flange portion 11a is moved from the pressing portion 8C of the second insertion portion 8 to the lower side. Since a downward force acts, the first holding member 10A and the second holding member 10B move close to each other. Next, the first insertion portion 5 is pulled and fixed to the first insertion portion 6 by using a tool to tighten the proximity nut 91 of the first holding member 10A screwed into the male screw portion Ra2 of the connection bolt Ra. At this time, by tightening the proximity nut 91 using a tool, the first insertion portion 5 moves upward, and an upward force acts on the outer surface 1a of the branch flange portion 12a from the pressing portion 5C of the first insertion portion 5. Therefore, the first holding member 10A and the second holding member 10B move close to each other. As a result, it is possible to prevent water leakage from the joint surface 1b of the two flange portions 11a, Ta and both flange portions Va, 12a, and also prevent water leakage from the joint surface 1b of the divided portion 1.

  In this case, when the proximity nut 91 screwed into the male screw portion Ra2 of the connection bolt Ra or the head Ra1 of the connection bolt Ra is tightened using a tool, an operation from the side or from below is required. There is no problem if there is enough space between the manhole.

[Other Embodiments]
(1) The connecting bolt Ra is not limited to the head Ra1 retreated radially inward than the male screw part Ra2, and may be a head Ra1 protruding radially outward from the male screw part Ra2.
(2) The holding members 10A, 10B may be arranged so that the bolts 41a, 42a or the nuts 41b, 42b are arranged between the two pressing parts 5C, 6B, 7B, 8C. That is, the two pressing portions 5C, 6B, 7B, 8C are disposed on both sides of the bolts 41a, 42a or the nuts 41b, 42b.
(3) The pressing portions 5C, 6B, 7B, 8C of the holding members 10A, 10B are not limited to those formed in a forked shape, and may be constituted by a single pressing portion.
(4) The reinforcing jig P is not limited to the case where it is used for the repair valve case X, and may be attached to pipes having no division 1, fluid equipment, or a joint between fluid equipment and pipe. Can be used to prevent water leakage from any joint. Further, the reinforcing jig P is not limited to the case where the reinforcing jig P is used to prevent water leakage from the joint, and may be used to prevent leakage of another liquid or gas from the joint.

  INDUSTRIAL APPLICATION This invention can be utilized for the flange reinforcement jig which reinforces both protrusion parts which protrude in the radial direction of both cylindrical members, and its attachment method.

1a: outer surface 5: first insertion portion 5C: pressing portion 6: first inserted portion 6B: pressing portion 7: second inserted portion 7B: pressing portion 8: second insertion portion 9: spacing member 10A: first One holding member 10B: second holding member 11: connecting pipe (first cylindrical member)
11a: Connection flange (first protrusion)
12: Branch pipe (fourth tubular member)
12a: Branch flange portion (fourth protrusion)
91: Proximity nut 92: Position adjustment nut 93: Pressing nut Ka: First fastening mechanism Kb: Second fastening mechanism P: Reinforcing jig (flange reinforcing jig)
R: connecting mechanism Ra: connecting bolt T: short pipe (second cylindrical member)
Ta: short pipe flange (second protrusion)
V: Valve box (third cylindrical member)
Va: Valve box flange (third protrusion)

Claims (7)

A first protrusion protruding radially outward from an end of the first cylindrical member and a second protrusion protruding radially outward from an end of the second cylindrical member and facing the first protrusion are sandwiched. A first holding member,
A first fastening mechanism for fastening the first holding member,
A third protruding portion protruding radially outward from an end of the third cylindrical member and a fourth protruding portion protruding radially outward from an end of the fourth cylindrical member and facing the third protruding portion are sandwiched. A second holding member,
A second fastening mechanism for fastening the second holding member,
A coupling mechanism that applies a force in a near direction to bring the first holding member and the second holding member close to each other,
A flange reinforcing jig, wherein the connection mechanism has a connection bolt, and the connection 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 approach direction,
The flange reinforcing jig according to claim 1, wherein the second holding member includes a second insertion portion and a second inserted portion that receives the second insertion portion along the approach direction. The second fastening mechanism has a female screw portion formed in the second inserted portion and screwed to the connection bolt, and a pressing nut for pressing an outer surface of the second inserted portion,
The flange reinforcing jig according to claim 2, wherein the second fastening mechanism draws and fixes the second insertion portion to the second inserted portion by screwing the connection bolt to the female screw portion and tightening the connection bolt. The first fastening mechanism presses an outer surface of the first inserted portion to adjust a relative position of the first inserted portion to the first insertion portion, and a position adjusting nut, and an outer surface of the first inserted portion. A proximity nut for pressing in the proximity direction,
The first fastening mechanism pulls the first insertion portion toward the first inserted portion by screwing and tightening the proximity nut to the connection bolt in a state where the relative position is adjusted by the position adjustment nut. The flange reinforcing jig according to claim 3, which is fixed. The first holding member is vertically above the second holding member,
The flange reinforcing jig according to claim 4, wherein the first insertion portion is vertically above the first insertion portion, and the second insertion portion is vertically above the second insertion portion. Utensils.   Locked between a pressing portion of the first inserted portion pressing the outer surface of the second protruding portion and a pressing portion of the second inserted portion pressing the outer surface of the third protruding portion. The flange reinforcing jig according to claim 5, further comprising a spacing member that maintains a spacing between the pressing portion of the first inserted portion and the pressing portion of the second inserted portion. It is a mounting method of the flange reinforcement jig of Claim 5 or 6, Comprising:
The first holding member and the second holding member in a state in which the connection mechanism, the first fastening mechanism, and the second fastening mechanism are temporarily fixed are connected to the first protrusion, the second protrusion, and the second holding member. A first step of moving close to the three protrusions and the fourth protrusion,
A second step of bringing the pressing portion of the first insertion portion into contact with the outer surface of the first projecting portion, and bringing the pressing portion of the second inserted portion into contact with the outer surface of the third projecting portion,
In a state where the pressing nut is pressing the outer surface of the second inserted portion, a third step of tightening the connection bolt and pulling and fixing the second inserted portion to the second inserted portion,
A fourth step of rotating the position adjusting nut and bringing the pressing portion of the first inserted portion into contact with the outer surface of the second projecting portion,
A fifth step of tightening the proximity nut to draw and fix the first insertion portion to the first inserted portion, and fixing the flange insertion jig.

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