JP2016125599A - Reinforcement jig of joint part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rationally form a reinforcement jig which securely reinforces a flange joint part.SOLUTION: A reinforcement jig P includes: a first sandwiching member 6 which presses an outer surface 2c of a first flange part La on which head parts 71a or nuts 73 of connection bolts 7 or expansion parts are disposed; a second sandwiching member 5 which presses an outer surface 1c of a second flange part 1A; and a fastening mechanism 8. The first sandwiching member 6 has first pressing parts 6B which press the head part 71a or the nut 73 or both side areas of the expansion part along a circumferential direction. The first sandwiching member 6 or the second sandwiching member 5 includes a contact part 6h which may contact with at least one of a first cylindrical member L and a second cylindrical member X.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a reinforcing jig that reinforces a joint portion between flange portions projecting radially outward from the ends of both cylindrical members.

  As the reinforcing jig, for example, in Patent Document 1, a pair of clamping members each having a pressing portion that abuts against a pair of flange joints, and a fastening mechanism that pulls both the clamping members in the joining direction of the joints and fixes them. The structure provided with these is disclosed.

  In addition, one clamping member is formed with a C-shaped drop-off preventing arm that comes into contact with the head or nut of the connecting bolt that connects both flange portions from the radially inward direction. This drop-off prevention arm prevents the reinforcing jig from dropping off from both flange portions.

JP 2014-141995 A

  By the way, in the repair valve, after the valve body is accommodated in the valve box, a short pipe that prevents the valve body from being pulled out is fixed to the valve box with a bolt, and this fixing part is radially outward from the valve box or the short pipe. A bulging portion that bulges out may be formed. In this case, the circumferential interval between the head portion of the connecting bolt present in the flange portion such as a short pipe and the bulging portion is narrow, and the pressing portion of the reinforcing jig cannot be sufficiently inserted into the interval. As a result, the portion of the reinforcing jig that faces the outer peripheral surface of both flange portions is largely separated from both flange portions, and the reinforcing jig may fall off. In addition, due to this separation, when both the clamping members are fastened with bolts or the like, the both clamping members are likely to rotate together and easily shift their positions, and it is difficult to exert a desired pressing force.

  In addition, in order to make the diameter of the repair valve compact, the space inside the diameter is often narrower than the heads of the connecting bolts arranged on both flanges, and the drop prevention arm is connected to the head of the connecting bolt. Can not be hooked on the part. For this reason, when an unexpected external force is applied to the reinforcing jig, the reinforcing jig may fall off. In addition, an operation handle for opening and closing the valve body is formed in the radially outward direction in the repair valve, and the attachment position of the reinforcing jig may be limited.

  Accordingly, an object of the present invention is to rationally configure a reinforcing jig that can reliably reinforce the flange joint.

  The characteristic configuration of the reinforcing jig for the joining portion according to the present invention includes a first flange portion projecting radially outward from the first tubular member and a second flange projecting radially outward from the end portion of the second tubular member. The first flange part, which is mounted on a joint part joined with a connecting bolt and has a bulging part bulging radially outward from the head or nut of the connecting bolt or the first tubular member A first clamping member that presses the outer surface of the second flange member, a second clamping member that presses the outer surface of the second flange portion, the first clamping member and the second clamping member, and the first flange portion and the second clamping member. And a fastening mechanism that fixes the second flange portion in the vicinity of the joining direction of the second flange portion, and the first clamping member is arranged in the circumferential direction of the first tubular member of the head portion, the nut, or the bulging portion. It has two first pressing parts that press the areas on both sides along the front, The first clamping member or said second clamping member is that a contact portion of at least one and possible contact between said first cylindrical member and the second tubular member is formed.

  According to this configuration, since the two first pressing parts of the first clamping member are arranged on both sides along the circumferential direction of the connecting bolt or the bulging part, when attaching the reinforcing jig to the joint part, The first pressing portion is smoothly inserted along the radial direction so as to sandwich the head or nut of the connecting bolt or the bulging portion. For this reason, even if the space | interval of the circumferential direction of the head etc. of a connection bolt and a bulging part is narrow, the 1st press part of a reinforcement jig | tool can fully be inserted. Therefore, it is possible to eliminate the inconvenience that the portion of the reinforcing jig that faces the outer peripheral surface of both flange portions is dropped away from both flange portions.

  Further, since the two first pressing portions are inserted along the radial direction, the reinforcing jig can be surely inserted into the flange joint portion even when the space inside the diameter portion is narrower than the connecting bolt. In addition, since both sides of the connecting bolt are pressed, a large pressing area can be secured, and the flange joint can be reliably reinforced.

  Furthermore, in this structure, since the contact part which can contact | abut at least one of a 1st cylindrical member and a 2nd cylindrical member is formed in a 1st clamping member or a 2nd clamping member, both clamping members are fastened. When fixing by the mechanism, even if both clamping members try to rotate, the abutting portion comes into contact with at least one of the first cylindrical member and the second cylindrical member, and rotation is prevented. As a result, the reinforcing jig is mounted at an appropriate position, so that a desired pressing force can be exhibited.

  Thus, the reinforcement jig | tool which can reinforce the flange junction part of a repair valve reliably with the simple structure of providing two 1st press parts and contact parts was able to be provided.

  According to another characteristic configuration, the contact portion includes a circumference of an inner surface of the first clamping member or the second clamping member that is opposed to an outer circumferential surface of at least one of the first flange portion and the second flange portion. At least one end along the direction is formed so as to protrude radially inward and is in contact with at least one of the first flange portion and the second flange portion.

  According to this configuration, when both the clamping members are fixed by the fastening mechanism, even if both the clamping members try to rotate, the abutting portion comes into contact with at least one of the first flange portion and the second flange portion to prevent the rotation. The As a result, the reinforcing jig is mounted at an appropriate position, so that a desired pressing force can be exhibited. Moreover, since the contact portion has a simple configuration in which the contact portion is formed to protrude in the radially inward direction at the end portion of the inner surface of the first clamping member or the second clamping member, processing is easy.

  According to another characteristic configuration, the second clamping member has two second pressing portions that press the regions on both sides along the circumferential direction of the head of the connecting bolt or the nut disposed on the second flange portion. The two second pressing portions are configured such that a surface facing the one side of the head or the nut formed in a polygonal shape is formed in a shape along the one side.

  If the opposing surfaces along one side of the polygonal shape such as the heads of the connecting bolts are formed on the two second pressing parts as in this configuration, anticipation can be expected when fixing both clamping members with the fastening mechanism and on the reinforcing jig. Even if the reinforcing jig rotates when an external force is applied, the opposing surface can come into contact with one side of the connecting bolt to prevent rotation. That is, the fastening force of the connecting bolt fastened and fixed to both flange portions becomes a resistance force that prevents the reinforcement jig from rotating. As a result, the fixing posture of the reinforcing jig with respect to the flange joint can be stabilized over a long period of time. Even when the connecting bolt is tightened after the reinforcing jig is tightened and fixed, the second pressing part comes into contact with the head of the connecting bolt. Attaching work is efficient.

  According to another feature of the present invention, the two second pressing portions are notched with a receiving portion for receiving a washer member interposed between the head or the nut and the outer surface of the second flange portion. There is in point.

  Even if a washer member is provided between the head of the connecting bolt and the outer surface of the second flange portion by forming a housing portion that accommodates the washer member as in this configuration, the two second pressing portions Can be smoothly inserted into both sides of the head of the connecting bolt from the radial direction.

  Another characteristic configuration is that an insertion portion is formed on one of the first clamping member and the second clamping member at a position radially outward from the outer peripheral surface of the first flange portion, and the other An insertion portion for receiving the insertion portion therein is formed along the joining direction, and the fastening mechanism pulls and fixes the insertion portion and the insertion portion in the joining direction. The inserted portion is that a section perpendicular to the joining direction is formed in a trapezoidal shape whose diameter increases as it approaches the first flange portion.

  By providing an insertion part and a part to be inserted as in this configuration, a shearing force that causes the flange parts to be displaced in the radial direction acts, or a tensile force that pulls the flange parts apart in the axial direction acts. Even when the pressing portion of the holding member receives a force in the opening direction, the force applied to the fastening portion of the fastening mechanism is dispersed because the force is received at the overlapping portion between the insertion portion and the insertion portion. Moreover, since the contact area of both clamping members becomes large by forming the cross-sectional shape of an insertion part and a to-be-inserted part in trapezoid shape, desired resistance force is exhibited. Therefore, the durability of the reinforcing jig can be increased. Further, since the trapezoidal shape increases in diameter as it approaches the first flange portion, the two first pressing portions and the second pressing portion can be continuously expanded along the cross-sectional shape of the insertion portion or the insertion portion. Thus, it is possible to ensure a wide pressing area for the first flange portion while appropriately increasing the strength of the pressing portion. As a result, the fixing posture of the reinforcing jig relative to the flange joint portion of the repair valve can be further stabilized.

It is a disassembled perspective view of a cylindrical member. It is a longitudinal cross-sectional view which shows the state which attached the reinforcement jig | tool to the flange part of the cylindrical member. It is the III-III arrow line view of FIG. It is the IV-IV arrow line view of FIG. It is a VV arrow line view of FIG. FIG. 6 is a view taken in the direction of arrows VI-VI in FIG. 2. It is a figure which shows schematic structure of a 1st clamping member. It is a figure which shows schematic structure of a 2nd clamping member. It is a perspective view which shows the mounting state of a reinforcement jig. It is a perspective view which shows the mounting state of a reinforcement jig. 6 is a perspective view of a reinforcing jig according to another embodiment 1. FIG. 10 is a perspective view of a reinforcing jig according to another embodiment 2. FIG.

  Hereinafter, an embodiment of a reinforcing jig for a joint according to the present invention will be described with reference to the drawings. In this embodiment, as an example of the reinforcing jig P, a repair valve X (an example of a first cylindrical member or a second cylindrical member), an air valve L (an example of a first cylindrical member) or a branch pipe M ( The case where the flange joint part with an example of a 2nd cylindrical member is reinforced is demonstrated. However, the present invention is not limited to the following embodiments, and various modifications can be made without departing from the scope of the invention.

  FIG. 1 shows an exploded perspective view of the repair valve X, and FIG. 2 shows a longitudinal sectional view showing a state where the repair valve X, the air valve L, and the branch pipe M are joined. As shown in FIG. 1, the repair valve X includes a cast iron valve box Xa that houses a valve body (not shown) and a cast iron short tube Xb. After the valve body is accommodated in the valve box Xa, the valve box Xa and the short pipe Xb are joined by the embedded bolt 4. In the short tube Xb, a plurality of through holes 3a (four in this embodiment) penetrating in the joining direction (axial direction) are formed in the circumferential direction, and a groove 3d for accommodating the head 4a of the embedded bolt 4 is formed. Has been. Moreover, the hole 3b (four places in this embodiment) by which the end was obstruct | occluded is formed in the valve box Xa in the circumferential direction. A female screw portion 3c is formed on the inner peripheral surface of the hole portion 3b. By screwing the male screw portion of the embedded bolt 4 to the closed end surface of the hole portion 3b, the valve box Xa and the short tube Xb are connected. Be joined.

  As a result, as shown in FIG. 5, a plurality of bulging portions 1 b (four in the present embodiment) that bulge outward from the repair valve X are formed in the circumferential direction. The embedded bolt 4 in the present embodiment shows an example of a hexagon socket head cap screw having a circular head portion 4a in which a hexagon socket is formed. For example, the screw bolt may be configured to be tightened with a nut. There is no particular limitation.

  As shown in FIGS. 1 and 2, an air valve L and a fire hydrant are attached to one end of the repair valve X with a seal member 21 interposed, and a seal member 22 is attached to the other end of the repair valve X. A water pipe branch pipe M or the like is attached in the intervened state. At one end of the repair valve X, a disc-shaped flange portion 1A (an example of the second flange portion, hereinafter referred to as “second flange portion 1A”) is formed to protrude radially outward, and the second flange portion 1A is formed. And a disc-shaped flange portion La (an example of a first flange portion, hereinafter referred to as “first flange portion La”) protruding from the end portion of the air valve L in a radially outward direction. On the other hand, a disk-shaped flange portion 1B (an example of a first flange portion, hereinafter referred to as “first flange portion 1B”) is formed on the other end of the repair valve X so as to protrude radially outward. The part 1B is joined to the disk-shaped flange part Ma (an example of the second flange part, hereinafter referred to as “second flange part Ma”) protruding from the end of the branch pipe M in the radially outward direction by the connecting bolt 7. The

  A plurality of through holes 1a, 1a (four in this embodiment) penetrating in the joining direction are formed at equal intervals in the circumferential direction in both flange portions 1A, 1B of the repair valve X. A plurality of through holes 2a and 2b (four in this embodiment) penetrating in the joining direction are formed at equal intervals in the circumferential direction in the one flange portion La and the second flange portion Ma of the branch pipe M, respectively. ing. In the state where the through holes 1a, 1a of both flange portions 1A, 1B of the repair valve X and the through holes 2a, 2b of the first flange portion La of the air valve L and the second flange portion Ma of the branch pipe M are overlapped, The connecting bolt 7 is used for joining. In addition, in this embodiment, although the example which joins the connecting bolt 7 to four through-holes is shown, six or eight through-holes are formed according to the outer diameter of the flange joint portion. There is no particular limitation.

  The connecting bolt 7 includes a first connecting bolt 7A and a second connecting bolt 7B. The first connecting bolt 7A includes a polygonal (hexagonal in this embodiment) head 71a and a bolt part 71 having a male screw part, and a polygonal (hexagonal in this embodiment) first nut 72. Yes. The second connecting bolt 7 </ b> B includes a bolt portion 71 and a second nut 73 having a polygonal shape (hexagonal in this embodiment) that is bulkier than the first nut 72. Although the details will be described later, the second connecting bolt 7B is used at a location where the reinforcing jig P is joined with the connecting bolt 7 interposed therebetween. The first connection bolt 7A and the second connection bolt 7B may be configured according to the same standard, or the respective bolt portions 71 may be configured according to different standards. Further, the head portion 71a and the nuts 72 and 73 of the bolt portion 71 may be formed in a circular shape, or an embedded bolt structure may be used instead of the bolt / nut structure, and is not particularly limited.

  Hereinafter, in both flange portions 1A and 1B of the repair valve X, a surface exposed on the opposite side to the joint surface facing the first flange portion La of the air valve L and the second flange portion Ma of the branch pipe M is the outer surface 1c. , 1d, and the radially outer surfaces of the flange portions 1A, 1B will be described as outer peripheral surfaces 1e, 1f. Similarly, in the first flange portion La of the air valve L, the surface exposed on the opposite side of the joint surface facing the second flange portion 1A of the repair valve X is the outer surface 2c, and the radially outer surface is the outer peripheral surface 2e. In the second flange portion Ma of the branch pipe M, the surface exposed on the opposite side to the joint surface facing the first flange portion 1B of the repair valve X is the outer surface 2d, and the radially outer surface is the outer peripheral surface 2f. explain.

[Joint of air valve L and repair valve X]
The reinforcing jig P at the flange joint between the air valve L and the repair valve X will be described with reference to FIGS. 2 to 4 and FIGS. 7 to 9. Here, in the relationship between the air valve L and the repair valve X, the air valve L will be described as a first cylindrical member, and the repair valve X will be described as a second cylindrical member. As shown in FIG. 2, the reinforcing jig P is attached to a joint portion between the first flange portion La and the second flange portion 1A.

  As shown in FIGS. 3 to 4, the reinforcing jig P presses both side regions of the second nut 73 on the outer surface 2 c of the first flange portion La where the second nut 73 of the second connection bolt 7 </ b> B is disposed. The first clamping member 6 provided with two pressing portions 6B, 6B (an example of the first pressing portion, hereinafter referred to as “first pressing portion 6B”) and the outer surface 1c of the second flange portion 1A. And a second clamping member 5 having two pressing portions 5C, 5C (an example of a second pressing portion, hereinafter referred to as “second pressing portion 5C”). In addition, a fastening mechanism 8 is provided that draws (closes) the first clamping member 6 and the second clamping member 5 in the joining direction of the flange portions La and 1A. On the pressing surfaces 6e and 5e facing the flange portions La and 1A of the pressing portions 6B and 5C, for example, fine irregularities are formed on the pressing surfaces 6e and 5e, and the outer surface 2c of both flange portions La and 1A. , 1c may be subjected to friction processing so that frictional resistance is generated.

  As shown in FIG. 7, the 1st clamping member 6 is comprised with the metal member, and is integrally provided with the to-be-inserted part 6A and the 1st press part 6B. 6A of insertion parts are formed in the bottomed square cylinder shape which showed the trapezoid shape which diameter-expands, so that the outer surface 6a and the inner surface 6b approach the 1st flange part La in cross sectional view (sectional view perpendicular | vertical to a joining direction). (See FIG. 7A, which is a bottom view of FIG. 7C). In addition, the first pressing portion 6B is formed to extend in a bifurcated shape from one side of the four sides of the outer surface 6a of the inserted portion 6A toward the outer side.

  A cylindrical internal space 6c that receives an insertion portion 5A of the second clamping member 5 described later is formed in the inserted portion 6A along the joining direction of both flange portions La and 1A (FIG. 7A). VIIb-VIIb view of FIG. 7 (b)). That is, as shown in FIG. 9, when the reinforcing jig P is attached to both the flange portions La and 1 </ b> A, the second clamping member 5 is positioned at a position radially outward from the outer peripheral surface 2 e of the first flange portion La. An insertion portion 5A is formed, and the first holding member 6 is formed with an insertion portion 6A that receives the insertion portion 5A inside along the joining direction.

  The cylindrical internal space 6c is formed in a trapezoidal shape in a cross-sectional view, and is slightly larger than the outer diameter of the trapezoidal insertion portion 5A. For this reason, as shown in FIG. 9, the cross-sectional shape perpendicular to the joining direction of the outer surface 5a of the insertion portion 5A and the inner surface 6b of the insertion portion 6A is such that the insertion portion 5A is formed in the cylindrical inner space 6c of the insertion portion 6A. When inserted, it is slidable in the insertion direction (longitudinal direction of the cylindrical internal space 6c), but cannot be relatively rotated around the insertion direction (around the axis along the longitudinal direction of the cylindrical internal space 6c). It is formed as follows.

  In the cylindrical internal space 6c, an opening is formed on the side opposite to the side on which the first pressing portion 6B is formed. On the side where the first pressing portion 6B is formed in the cylindrical internal space 6c, an insertion hole 6d through which the male screw portion 8a of the fastening bolt 8A can be inserted and cannot be inserted through the head portion 8b is formed at the bottom of the inserted portion 6A. An opening is formed in a penetrating state. In a state where the male screw portion 8a of the fastening bolt 8A is inserted into the insertion hole 6d, a predetermined gap is formed between the outer peripheral surface of the male screw portion 8a and the inner peripheral surface of the insertion hole 6d ( (See FIG. 2).

  The first pressing portion 6B is formed in a bifurcated shape having the same arm length in a side view (see FIG. 7A), and is formed in a tapered shape that moves away from the insertion hole 6d toward the distal end side in a longitudinal sectional view. (See FIG. 7B). Moreover, the front-end | tip part of the opening side of the cylindrical internal space 6c among the 1st press parts 6B is formed as the press surface 6e perpendicular | vertical to the outer surface 6a of the to-be-inserted part 6A.

  As shown in FIG. 3, the first pressing portion 6 </ b> B is configured to press areas on both sides of the second nut 73 along the circumferential direction of the air valve L on the outer surface 2 c of the first flange portion La. . That is, the first pressing portion 6 </ b> B extends from the outer surface 6 a of the inserted portion 6 </ b> A toward the outside while maintaining a gap larger than the outer diameter of the second nut 73 and accommodates the second nut 73. A housing portion 6f is formed. When both the clamping members 6 and 5 are attached to the both flange portions La and 1A from the radially outward direction, the first pressing portion 6B of the first flange portion La is in a state where the nut housing portion 6f does not contact the second nut 73. The outer surface 2c will be pressed. Further, the pressing surface 6e of the first pressing portion 6B presses the vicinity of the second connecting bolt 7B that is radially outward from the seal member 21 interposed between the first flange portion La and the second flange portion 1A. It will be. Therefore, it is possible to reliably prevent water leakage from the gap between the second connecting bolts 7B while enhancing the sealing function of the sealing member 21.

  The inserted portion 6A of the first clamping member 6 is provided at both end portions along the circumferential direction of the inner surface (outer surface 6a) facing the outer peripheral surface 2e of the first flange portion La and the outer peripheral surface 1e of the second flange portion 1A. It has a contact portion 6h that protrudes in the radial direction and can contact both flange portions La and 1A (see FIG. 7C). The contact portion 6h has an inclined surface corresponding to the outer peripheral surface 2e of the first flange portion La. Although details will be described later, when the reinforcing jig P is fixed by the fastening mechanism 8, the rotation of the reinforcing jig P is prevented by the contact portion 6 h coming into contact with both the flange portions La and 1 </ b> A. In addition, you may provide this contact part 6h only in one edge part of the direction where the reinforcement jig | tool P rotates among the inner surfaces facing the outer peripheral surface 2e of 1st flange part La. FIG. Moreover, you may provide the contact part 6h only in the inner surface facing the outer peripheral surfaces 2e and 1e of either the outer peripheral surface 2e of the 1st flange part La or the 2nd flange part 1A. Furthermore, the shape of the contact portion 6h may be any shape such as a plurality of convex portions.

  As shown in FIG. 8, the second clamping member 5 is made of a metal member, and includes an insertion portion 5A and a hook-like portion 5B extending outward from the outer surface 5a of the insertion portion 5A. A second pressing portion 5C that extends further outward from one side of the four sides of the bowl-shaped portion 5B is integrally provided. The insertion portion 5A has a trapezoidal shape whose diameter increases as the outer surface 5a approaches the second flange portion 1A in a cross-sectional view, and the inner surface 5b is formed in a rounded bottomed rectangular tube shape (FIG. 8C). 8) is a plan view of FIG.

  A cylindrical cylindrical internal space 5c into which the male screw portion 8a of the fastening bolt 8A can be inserted is formed inside the insertion portion 5A. The inner diameter of the cylindrical inner space 5c is formed larger than the outer diameter of the male screw portion 8a of the fastening bolt 8A.

  The bowl-shaped part 5B is formed in a trapezoidal shape in a cross-sectional view perpendicular to the joining direction, and a cylindrical internal space 5c is formed through the center part (see FIG. 8A).

  In the cylindrical internal space 5c, the side on which the flange-shaped portion 5B and the second pressing portion 5C are formed is formed with an opening, and the side opposite to the side on which the flange-shaped portion 5B and the second pressing portion 5C are formed is a fastening bolt. A female screw portion 5d to which the male screw portion 8a of 8A can be screwed is formed so as to penetrate the bottom portion of the insertion portion 5A (FIG. 8 (a) is a view taken along the line VIIIb-VIIIb in FIG. 8 (a). b)). That is, the female screw portion 5d is formed at the end portion on the opposite side of the inner surface 5b of the cylindrical inner space 5c in the insertion portion 5A from the side on which the flange portion 5B and the second pressing portion 5C are formed.

  The second pressing portion 5C is formed in a bifurcated shape having the same arm length in a side view (see FIG. 8A), and has a tapered shape that inclines toward the female screw portion 5d as it goes to the distal end side in a longitudinal sectional view. (See FIG. 8B). Further, the tip portion of the surface on the female screw portion 5d side of the second pressing portion 5C is formed as a pressing surface 5e perpendicular to the outer surface 5a of the insertion portion 5A.

  As shown in FIG. 4, the second pressing portion 5C presses the regions on both sides of the head 71a of the second connecting bolt 7B along the circumferential direction of the repair valve X on the outer surface 1c of the second flange portion 1A. It is configured. Moreover, the contact surface 5g which contacts along the both sides which the head 71a formed in the polygonal shape opposes is provided. When both the clamping members 6 and 5 are inserted into the both flange portions La and 1A and fixed by the fastening mechanism 8, the rotation of the both clamping members 6 and 5 is prevented if the abutting portion 6h abuts on both the flange portions La and 1A. Is done. In addition, by bringing the contact surface 5g of the second pressing portion 5C into contact with both sides of the head 71a, the fastening force of the second connecting bolt 7B acts to reliably prevent the rotation of both the clamping members 6 and 5. Can do. In the present embodiment, the contact surface 5g is brought into contact along both opposing sides of the head 71a, but at least a surface facing one side of the head 71a is in a non-contact state close to one side of the head 71a. As long as they are formed in parallel.

  Further, as shown in FIG. 4, a washer member 71c is interposed between the head 71a of the second connecting bolt 7B and the outer surface 1c of the second flange portion 1A. An accommodating portion 5h that accommodates the washer member 71c is cut out (see FIG. 8C). As a result, the second clamping member 5 is inserted into the second flange portion 1A without being obstructed by the washer member 71c, and both opposing sides of the head 71a of the second connecting bolt 7B are in contact with the contact surface 5g. In this state, the first pressing portion 6B presses the outer surface 1c of the second flange portion 1A. In the present embodiment, the washer member 71c is also interposed between the head 71a and nuts 72 and 73 of the first connecting bolt 7A and the outer surfaces 2c and 1c of both flange portions La and 1A.

  As shown in FIG. 9, the fastening mechanism 8 is formed on the above-described fastening bolt 8A that is inserted into the cylindrical internal space 6c from the outside of the inserted portion 6A through the insertion hole 6d, and the inner surface 5b of the insertion portion 5A. The female screw portion 5d. The fastening bolt 8A includes a male screw portion 8a and a polygonal (hexagonal in this embodiment) head portion 8b. Note that the fastening bolt 8A is not limited to a hexagon bolt, and may take any form such as a hexagon socket head bolt.

  Next, an operation process for attaching the reinforcing jig P to the joint portion between both flange portions La and 1A will be described.

  As shown in FIG. 9, first, a plurality of existing bolts (not shown) at the joint between both flange portions La and 1A are removed, replaced with the first connection bolt 7A and the second connection bolt 7B, and temporarily tightened. Next, the insertion portion 5A of the second clamping member 5 is replaced with the cylindrical inner space 6c of the insertion portion 6A of the first clamping member 6 at a position radially outside the outer peripheral surfaces 2e, 1e of both flange portions La, 1A. And inserted along the joining direction. At that time, since the outer surface 5a of the insertion portion 5A and the inner surface 6b of the insertion portion 6A are formed in a trapezoidal shape that cannot be relatively rotated in a cross-sectional view, the second pressing portion 5C of the second clamping member 5 and the first pressing portion 5C The first pressing portion 6B of the holding member 6 can be easily inserted in a state where the first pressing portion 6B is positioned in a desired relative positional relationship extending in the same direction.

  Next, the fastening bolt 8A is inserted into the cylindrical internal space 6c from the outside of the insertion portion 6A in the joining direction through the insertion hole 6d and temporarily fixed. The engagement between the insertion portion 5A and the insertion portion 6A and the temporary fixing of the fastening bolt 8A are such that the distance between the pressing surface 6e of the first pressing portion 6B and the pressing surface 5e of the second pressing portion 5C is the first flange portion. This is performed to a degree that is slightly larger than the distance between the outer surface 2c of La and the outer surface 1c of the second flange portion 1A. That is, the size (insertion distance) of the overlapping portion between the insertion portion 5A and the insertion portion 6A in the joining direction and the interval between the pressing surface 5e and the pressing surface 6e can be appropriately set. For this reason, even when the wall thickness is changed according to the nominal diameter and design pressure of both flange portions La, 1A, by adjusting the size of the overlapping portion, both sandwiching members 6, 5 are connected to both flange portions La, It can be clamped and fixed to 1A.

  Subsequently, the reinforcing jig P is inserted into both flange portions La and 1A from the radially outward direction so that the pressing portions 6B and 5C of the both clamping members 6 and 5 are positioned on both sides of the second connecting bolt 7B, and the inserted portion is inserted. The outer surface 6a of the portion 6A is brought into contact with at least one of the outer peripheral surfaces 2e and 1e of the flange portions La and 1A. In this state, the pressing surface 6e of the first pressing portion 6B is brought into contact with the outer surface 2c of the first flange portion La, and the pressing surface 5e of the second pressing portion 5C is brought into contact with the outer surface 1c of the second flange portion 1A. Until contact is made, the insertion portion 5A and the insertion portion 6A are pulled in the joining direction. At this time, the contact surface 5g comes into contact with both sides of the head 71a of the second connecting bolt 7B, and the washer member 71c is housed in the housing portion 5h.

  Next, the fastening bolt 8A is fastened and permanently fixed. At this time, the fastening bolt 8A is located on the radially outer side from both the flange portions La and 1A, so that the fastening operation is easy. On the other hand, with the fastening operation of the fastening bolt 8A, both the clamping members 6, 5 may rotate relative to the both flange portions La, 1A, and the both clamping members 6, 5 may fall off.

  However, since the reinforcing jig P in the present embodiment has the contact portion 6h at the end of the outer surface 6a facing the outer peripheral surfaces 2e and 1e of both flange portions La and 1A, the contact portion 6h is the both flange portions La. , 1A, and the rotation of both clamping members 6 and 5 can be prevented. Moreover, since the contact surface 5g of the second pressing part 5C is in contact with both sides of the head 71a, the fastening force of the second connecting bolt 7B acts to prevent the rotation of both the clamping members 6 and 5 in advance. Can do. As a result, the tightening operation of the fastening bolt 8A is further facilitated, and the mounting posture of the both clamping members 6 and 5 can be stabilized. In addition, it is good also as only this fixing, without performing temporary fixing of the fastening bolt 8A mentioned above.

  When one reinforcing jig P is permanently fixed to both flange portions La and 1A, the other reinforcing jigs P are fixed by repeating the same operation. And after fixing the reinforcement jig | tool P to two places of the 2nd connection bolt 7B arrange | positioned facing the outer surface 2c, 1c of both flange parts La and 1A, all the 1st connection bolt 7A and 2nd The connecting bolt 7B is permanently fixed, and the mounting of the reinforcing jig P is completed. At this time, since the second connecting bolt 7B is constituted by a high nut type, the tightening operation is easy. Further, since the contact surface 5g of the second pressing portion 5C comes into contact with the head 71a of the second connecting bolt 7B, if only the second nut 73 is tightened, the rotation of the bolt portion 71 is prevented and the tightening operation is efficient. Is. It should be noted that the main fixing of the reinforcing jig P and the main fixing of the first connecting bolt 7A and the second connecting bolt 7B may be appropriately switched in order or repeated. Moreover, although the example which mounts the reinforcement jig | tool P in two places among four connection bolts 7 was shown in this embodiment, according to the required intensity | strength of a junction part, the connection bolt 7 of one place or three places or more is shown. A reinforcing jig P may be attached to the.

  In this way, the insertion portion 5A is fixed inside the inserted portion 6A in a state where the pressing portions 6B, 5C of the sandwiching members 6, 5 are in contact with the outer surfaces 2c, 1c of the flange portions La, 1A. The inserted portion 5A and the inserted portion 6A are overlapped in the joining direction. For this reason, when a shearing force that causes the flange portions La and 1A to shift in the radial direction is applied, or when a tensile force that separates the flange portions La and 1A in the axial direction acts, the pressing portions 6B and 5C are opened in the opening direction. Even when force is received, in addition to the fastening portion of the fastening mechanism 8, these forces are also received at the overlapping portion of the insertion portion 5 </ b> A and the inserted portion 6 </ b> A, so that the fastening force applied to the fastening portion of the fastening mechanism 8 is reduced. Can be prevented.

  Further, since the female screw portion 5d of the insertion portion 5A is positioned in the vicinity of the head 8b of the fastening bolt 8A, the screwed portion between the female screw portion 5d and the male screw portion 8a of the fastening bolt 8A is fastened. The head 8b of the bolt 8A is close to a position where it comes into contact with the upper surface 6g of the inserted portion 6A. That is, the distance between the head portion 8b of the fastening bolt 8A and the screwed portion in the joining direction is relatively small. Thereby, even when a shearing force or a tensile force acts on both flange portions La and 1A, it is possible to satisfactorily prevent the fastening bolt 8A from being stretched or broken.

  Further, since the female screw portion 5d is positioned at the overlapping portion of the insertion portion 5A and the inserted portion 6A in the cylindrical internal space 6c, the length of the fastening bolt 8A can be made relatively short. . Moreover, in the present embodiment, at the radially outer positions of the outer peripheral surfaces 2e and 1e of the flange portions La and 1A, the locations where the insertion portion 5A and the insertion portion 6A are disposed are the same as the locations where the fastening bolts 8A are disposed. become. Thereby, both the dimension in the joining direction and the dimension in the radial direction of the reinforcing jig P and the fastening bolt 8A attached to both flange portions La and 1A can be reduced, and space saving can be achieved. it can.

  In this way, by attaching the reinforcing jig P, it is possible to reliably reinforce the joint between the flange portions La and 1A. At this time, the first clamping member 6 and the second clamping member 5 are provided with the bifurcated first pressing portion 6B and the second pressing portion 5C, so that the connecting bolts of the outer surfaces 2c and 1c of both flange portions La and 1A are connected. Even in the case where the space in the region on the inner side of the diameter 7 is narrow, the reinforcing jig P can be easily mounted from the radially outward direction. In addition, since the inner surface 6b of the inserted portion 6A and the outer surface 5a of the inserted portion 5A are formed in a trapezoidal shape that increases in diameter as they approach the second flange portion 1A, the pressing areas of the pressing portions 6B and 5C are secured widely. be able to. As a result, the reinforcing strength of the flange joint portion of the repair valve X is effectively increased.

[Joint of repair valve X and branch pipe M]
5 to 6 and 10 show an embodiment in which a reinforcing jig P is attached to the joint between the repair valve X and the branch pipe M. Only the configuration different from the embodiment in which the reinforcing jig P is attached to the joint between the air valve L and the repair valve X described above will be described. Here, regarding the relationship between the repair valve X and the branch pipe M, the repair valve X will be described as a first cylindrical member, and the branch pipe M will be described as a second cylindrical member.

  A joint portion between the repair valve X and the branch pipe M is formed in the joint portion between the air valve L and the repair valve X described above with a predetermined interval (for example, a joint surface interval of 100 mm to 400 mm). As shown in FIGS. 3 and 5, the reinforcing jig P attached to the joint portion is positioned in the circumferential direction with respect to the reinforcing jig P attached to the joint portion between the air valve L and the repair valve X. It is shifted about 45 degrees. That is, even when the joint surface interval defined by the repair valve X is small, the reinforcing jigs P arranged above and below do not interfere with each other, so that it is possible to reinforce the flange joint portion having any joint surface interval. It should be noted that the circumferential positions of the reinforcing jigs P in the vertical direction are not limited to be shifted by about 45 degrees, and may be shifted by, for example, 30 degrees or any angle. The circumferential position of each reinforcing jig P in the vertical direction need not be shifted.

  By the way, the recent repair valve X for embedding has a particularly narrow joint surface interval. In this case, it is preferable to arrange the head 8b of the fastening bolt 8A of the reinforcing jig P fixed to the joint between the repair valve X and the branch pipe M on the outer surface 2d side of the second flange portion Ma. In other words, the head 8b of the fastening mechanism 8 occupies the space of the joint surface by installing the reinforcing jig P fixed to the joint between the repair valve X and the branch pipe M shown in FIG. Therefore, interference between the reinforcing jigs P can be prevented. As a result, it is not necessary to shift the circumferential position of each reinforcing jig P in the vertical direction, and the main fixing of the fastening mechanism 8 and the main fixing of the connecting bolt 7 are performed from the outer surface 2d side of the second flange portion Ma. It is efficient because you can work.

  In the joining direction view as shown in FIG. 5, a plurality of bulging portions 1 b bulging radially outward from the cylinder main body of the repair valve X are arranged in the circumferential direction at the joint portion between the repair valve X and the branch pipe M. Has been. A plurality of first connecting bolts 7A are disposed between the bulging portions 1b. For this reason, the space | interval of the circumferential direction of 7 A of 1st connection bolts and the bulging part 1b is narrow, and it is difficult to insert the reinforcement jig | tool P in this space | interval. Therefore, in the present embodiment, the first pressing portion 6B of the first clamping member 6 is configured to press the regions on both sides along the circumferential direction of the bulging portion 1b. As a result, when the reinforcing jig P is inserted from the radially outward direction of both flange portions 1B, Ma, the first pressing portion 6B can be sufficiently inserted.

  Moreover, in this embodiment, as shown in FIG. 6, the 2nd press part 5C of the 2nd clamping member 5 is arrange | positioned in the site | part in which the connection bolt 7 is not arrange | positioned. That is, by using a reinforcing jig P similar to the reinforcing jig P used at the joint between the repair valve X and the branch pipe M, mass production is achieved and manufacturing costs are saved. In this embodiment, since the reinforcing jig P is attached to a portion where the connecting bolt 7 does not exist, the second clamping member 5 is not formed with the bifurcated second pressing portion 5C, but a single second pressing You may comprise by the part 5C.

  Next, an operation process for mounting the reinforcing jig P will be briefly described with reference to FIG. First, a plurality of existing bolts (not shown) at the joint between the flange portions 1B and Ma are removed, replaced with the first connecting bolt 7A, and temporarily tightened. Next, the insertion portion 5A is inserted along the joining direction into the cylindrical inner space 6c of the inserted portion 6A at a position radially outward from the outer peripheral surfaces 1f, 2f of the flange portions 1B, Ma. Next, the fastening bolt 8A is inserted into the cylindrical internal space 6c from the outside of the insertion portion 6A in the joining direction through the insertion hole 6d and temporarily fixed.

  Subsequently, the reinforcing jig P is inserted into both flange portions 1B and Ma from the radially outward direction so that the first pressing portion 6B is located on both sides of the bulging portion 1b, and the outer surface 6a of the inserted portion 6A is inserted into both flanges. It is made to contact | abut at least one of the outer peripheral surfaces 1f and 2f of the part 1B and Ma. Next, the male screw portion 8a of the fastening bolt 8A is screwed into the female screw portion 5d of the insertion portion 5A inserted into the cylindrical inner space 6c, and the head portion 8b of the fastening bolt 8A is the upper surface of the inserted portion 6A. This is fixed until it comes into contact with 6g. At this time, also in this embodiment, both clamping members are provided by providing the contact part 6h in the edge part of the outer surface 6a which opposes the outer peripheral surfaces 1f and 2f of both flange parts 1B and Ma among the 1st clamping members 6. 6 and 5 rotations can be prevented. In addition, the U-shaped inner peripheral surface (nut accommodating portion 6f) sandwiched between the two first pressing portions 6B is formed in a shape that follows the outer peripheral shape of the bulging portion 1b, and the inner peripheral surface of the first pressing portion 6B. It is good also as the contact part 6h contact | abutted to the bulging part 1b. In this case, the contact portion 6h provided at the end portion of the first clamping member 6 may be omitted, and the rotation of the both clamping members 6 and 5 can be prevented.

  When one reinforcing jig P is permanently fixed to both the flange portions 1B and Ma, the other reinforcing jigs P are fixed by repeating the same operation. And after fixing the reinforcement jig | tool P at two places of the bulging part 1b arrange | positioned facing the circumferential direction of the outer surface 1d, 2d of both flange parts 1B and Ma, all the 1st connection bolts 7A are attached. After the main fixing, the mounting of the reinforcing jig P is completed. In addition, since the effect in this embodiment is the same as that of embodiment mentioned above, detailed description is abbreviate | omitted.

  In the following, another embodiment according to the present invention will be described with reference to FIGS. In addition, in order to make an understanding of drawing easy, it demonstrates using the same name and code | symbol to the same member.

[Another embodiment 1]
As shown in FIG. 11, in this embodiment, the polygonal protrusion 61 is provided in the outer surface (outer surface 6a) on the opposite side to the flange junction part of the 1st clamping member 6. As shown in FIG. When both the clamping members 6 and 5 are inserted into the flange joint portion and fixed by the fastening mechanism 8, for example, if the fastening bolt 8 </ b> A of the fastening mechanism 8 is tightened while the projection 61 is clamped by a wrench (not shown), the reinforcement treatment is performed. The rotation of the tool P can be prevented. In addition, this protrusion 61 may be provided in the side surface located in the back | inner side with respect to the fastening rotation direction of the fastening bolt 8A, and will not be specifically limited if it is a position which can be clamped with a wrench. Further, the protrusion 61 is not limited to a polygonal shape, and may have any shape such as a circular shape.

[Another embodiment 2]
As shown in FIG. 12, in the present embodiment, a polygonal protrusion 62 having a groove 62a at the center is provided on the outer surface of the first clamping member 6 opposite to the flange joint. After a plurality of reinforcing jigs P inserted into the flange joints are temporarily fixed by the fastening mechanism 8, a holding member 63 formed of a chain or the like is engaged with each of the reinforcing jigs P in the groove 62 a and operated. By pushing the holding member 63 with the tool 64, the reinforcing jig P is pressed in the radially inward direction. Next, if the both clamping members 6 and 5 are permanently fixed by the fastening mechanism 8, the rotation of the reinforcing jig P can be prevented. Next, if the holding member 63 is removed, the plurality of reinforcing jigs P are arranged in a desired posture with respect to the flange joint portion. The holding member 63 may be installed without being removed. In this case, the fixed posture of the reinforcing jig P can be maintained for a long time.

[Other Embodiments]
(1) In the above-described embodiment, the first clamping member 6 integrally includes the inserted portion 6A and the first pressing portion 6B, but the inserted portion 6A and the first pressing portion 6B are separate members. It may be configured. In this case, the 1st press part 6B is comprised by the movable member which has an internal thread part, for example, the 1st press part 6B is moved linearly by screwing a volt | bolt, and both clamping members 6 and 5 are adjoined to a flange junction part. A form that is fixed in place is assumed. Further, the first pressing portion 6B may be moved by a wedge member or the like, and any method may be used for fixing the holding members 6 and 5 close to the flange joint portion. Moreover, you may comprise 5 C of 2nd press parts of the 2nd clamping member 5 with a movable member.

(2) When the both clamping members 6 and 5 are permanently fixed by the fastening mechanism 8, as a form for preventing the rotation of the reinforcing jig P, a rubber member is attached to the surface of the pressing surfaces 6 e and 5 e to obtain a desired frictional resistance. It is good also as a structure to produce. In this case, while preventing the rotation of the reinforcing jig P, the rubber member is crushed and the adhesion of the sandwiching members 6 and 5 to the flange joint portion can be enhanced.

(3) You may provide the band member which controls the movement to the radial direction of both the clamping members 6 and 5 with which the flange junction part was mounted | worn over the some reinforcement jig | tool P. As shown in FIG. The band member may be formed in a flat plate ring shape in which a through hole for accommodating the fastening bolt 8A is formed on the upper surface 6g of the first clamping member 6, and the upper surface 6g of the first clamping member 6 and the flange joint portion It is good also as a structure which couple | bonds the semicircular member of a cross-sectional view L-shape with a volt | bolt over the outer surface of an other side, and various forms are assumed.

(4) The structure of the 1st clamping member 6, the 2nd clamping member 5, and the fastening mechanism 8 in embodiment mentioned above can be changed suitably. For example, the insertion portion 5A is provided in the second clamping member 5 and the insertion portion 6A is provided in the first clamping member 6. However, the insertion portion is provided in the second clamping member 5, and the first clamping member 6 is provided with the insertion portion 5A. It is good also as a structure which provides an insertion part. In this case, the second clamping member 5 is formed with an abutting portion 6h that protrudes in the radially inward direction at an end portion along the circumferential direction of the inner surface facing the outer peripheral surface of the flange joint portion. Moreover, although the shape of the insertion part 5A of the second clamping member 5 and the inserted part 6A of the first clamping member 6 is a trapezoidal shape when viewed in cross section, the insertion part 5A such as an elliptical shape or a rectangular shape when viewed in cross section. As long as it is configured such that relative rotation around the joining direction is impossible in a state in which the inserted portion 6A is inserted, any shape may be used. Moreover, you may make the shape of the 1st press part 6B and the shape of the 2nd press part 5C into the same shape. The fastening mechanism 8 may be a bolt / nut structure, and is not particularly limited.

(5) The connecting bolt 7 that connects the flange joints in the above-described embodiment is not limited to a hexagon bolt, and may be in any form such as a double screw bolt or a hexagon socket head bolt.

(6) In the above-described embodiment, the example in which the reinforcing jig P is fixed to the flange joint portion between the repair valve X, the air valve L, and the branch pipe M is shown. However, the flange joint portion between the fluid devices or between the pipes, etc. Of course, the reinforcing jig P can be used. Moreover, the repair valve X mentioned above is only an example, and the reinforcing jig P in the embodiment described above can correspond to various repair valves X.

  The joint reinforcing jig according to the present invention can be used as a jig for reinforcing a joint between a fluid device, a fluid device and a pipe, a fluid device, or a pipe.

1A Second flange portion 1B First flange portion 1b Expanded portions 1c, 1d, 2c, 2d
1e, 1f, 2e, 2f Outer peripheral surface 5 Second clamping member 5A Insertion part 5C Second pressing part 5h Housing part 6 First clamping member 6A Inserted part 6B First pressing part 6h Contact part 7 Connecting bolt 71a Head 71c Washer member 73 Nut 8 Fastening mechanism L Air valve (first tubular member)
La 1st flange part M Branch pipe (2nd cylindrical member)
Ma 2nd flange part P Reinforcement jig X Repair valve (1st cylindrical member or 2nd cylindrical member)

Claims (5)

Attached to the joint where the first flange part projecting radially outward from the end of the first cylindrical member and the second flange part projecting radially outward from the end of the second cylindrical member are joined with a connecting bolt And
A first clamping member that presses an outer surface of the first flange portion where a bulging portion that bulges radially outward from the head or nut of the connecting bolt or the first cylindrical member is disposed;
A second clamping member that presses the outer surface of the second flange portion;
A fastening mechanism for fixing the first clamping member and the second clamping member close to each other in the joining direction of the first flange portion and the second flange portion;
The first clamping member has two first pressing portions that press the regions on both sides along the circumferential direction of the first tubular member of the head or the nut or the bulging portion,
A joint reinforcing jig in which a contact portion capable of contacting at least one of the first tubular member and the second tubular member is formed on the first sandwiching member or the second sandwiching member.   The contact portion is at least one of the first clamping member and the second clamping member along the circumferential direction of the inner surface facing the outer peripheral surface of at least one of the first flange portion and the second flange portion. The joint reinforcing jig according to claim 1, wherein the reinforcing portion is formed in a radially inward direction at an end of the first flange portion and abuts against at least one of the first flange portion and the second flange portion. The second clamping member has two second pressing portions that press the regions on both sides along the circumferential direction of the head or nut of the connecting bolt disposed in the second flange portion,
The joint part according to claim 1 or 2, wherein the two second pressing portions are configured such that a surface facing one side of the head or the nut formed in a polygonal shape has a shape along the one side. Reinforcing jig.   The receiving part which accommodates the washer member interposed between the said 2nd press part and the said head or the said nut, and the outer surface of the said 2nd flange part is notched and formed. Reinforcing jig for joints. An insertion portion is formed on either one of the first clamping member and the second clamping member at a position radially outward from the outer peripheral surface of the first flange portion, and the other is along the joining direction. An insertion portion for receiving the insertion portion therein is formed,
The fastening mechanism draws and fixes the insertion portion and the inserted portion in the joining direction,
The said insertion part and the said to-be-inserted part are formed in the trapezoid shape in which a cross section perpendicular | vertical to the said joining direction is diameter-expanded, so that it approaches the said 1st flange part. Reinforcing jig for joints.

Images