JP2019148337A - Flange reinforcement tool - Google Patents

Abstract

To provide a flange reinforcement tool which prevents holding members from floating from a flange face, and can retain a pressed state of the flange face when connecting the pair of holding members by a connection member.SOLUTION: A flange reinforcement tool reinforces flange connection by holding by a pair of holding members, a flange provided in a branch neck part extending in the vertical direction of a fluid pipe as one pipe passage constituting member, and a flange of the other pipe passage constituting member, and connecting the pair of holding members by a connection member. In each of the pair of holding members, a contact surface coming in contact with a flange face in the pipe passage axial direction of the flange of the pipe passage constituting member, and flange parts 42b,43b coming in contact with at least one of the outer peripheral surface of the flange, and the outer peripheral surface of the flange of a repair valve connected to the flange are integrally formed, and a split structure divided in a circumferential direction and annularly coupled by a coupling member is provided. The coupling member is detachably mounted in the pipe passage axial direction regardless of an obstacle in the pipe passage axial direction.SELECTED DRAWING: Figure 13

Description

  In the present invention, both flanges of pipe line constituting members respectively joined to both flanges of a valve device having flanges at both ends are sandwiched by a pair of sandwiching members, and the pair of sandwiching members are coupled by a connecting member to perform flange joining. The present invention relates to a flange reinforcing tool to be reinforced.

  The conventional flange joint structure (flange reinforcement) is a flange in the axial direction of the flange of an existing pipe line (pipe component member) that is joined to both flanges of a shutoff valve (valve device) having flanges at both ends. A pair of contact plates (clamping members) that are in contact with the surface are connected by a connecting rod (connecting member) to reinforce the flange joint (for example, see Patent Document 1).

Japanese Patent No. 4157198 (5th and 6th pages, Fig. 1)

  However, in the flange part joint structure of Patent Document 1, when a pair of contact plates that are in contact with the flange surfaces of the existing pipe lines that are respectively connected to both flanges of the shut-off valve are tightened by a connecting rod, the contact plates are already provided. Since a rotating force is generated with the outer peripheral edge of the flange of the pipe line as a fulcrum, there is a problem that the contact plate is lifted from the flange surface and the contact plate cannot sufficiently press the flange surface.

  An object of the present invention is to provide a flange reinforcing tool capable of preventing the holding member from being lifted from the flange surface and maintaining the pressed state of the flange surface when the pair of holding members are connected by a connecting member. .

In order to solve the above-mentioned problem, the flange reinforcing tool of the present invention is
Flange reinforcement that reinforces the flange joint by sandwiching both flanges of the pipe constituent members joined to both flanges of the valve device having flanges at both ends by a pair of sandwiching members, and connecting the pair of sandwiching members by the connecting members Tools,
At least one of the pair of clamping members includes a contact surface that contacts the flange surface in the pipe axis direction of the pipe component member, and an outer peripheral surface of the flange or an outer periphery of the flange of the valve device joined to the flange A flange that can contact at least one of the surfaces is integrally formed.
According to this feature, when the pair of clamping members are connected by the connecting member, the flange portion of the clamping member comes into contact with the pipe component member or the flange outer peripheral surface of the valve device, and the clamping member rotates with respect to the flange surface. Therefore, the clamping member can maintain the pressed state of the flange surface without lifting from the flange surface.

The flange reinforcing tool of the present invention is
The length of the flange portion in the pipe axis direction is longer than the thickness of the flange of the pipeline constituent member with which the flange portion is in contact.
According to this feature, since the rotation of the sandwiching member can be regulated using the entire length of the flange thickness with which the flange portion is in contact, the sandwiching member can be kept in contact with the flange surface without lifting from the flange surface. .

The flange reinforcing tool of the present invention is
The flange is in contact with at least one of the outer peripheral surface of the flange or the outer peripheral surface of the flange of the valve device joined to the flange.
According to this feature, the flange can abut against at least one of the outer peripheral surface of the flange or the outer peripheral surface of the flange of the valve device joined to the flange, and can support the reaction force of the connecting force by the connecting member. The sandwiching member can maintain the contact state with the flange surface with almost no rotation.

The flange reinforcing tool of the present invention is
The collar portion is characterized in that it extends in an arc shape at least in the circumferential direction of the flange of the pipe line constituting member.
According to this feature, since the flange portion extends in an arc shape in the circumferential direction of the flange of the pipe line constituting member, the rigidity of the flange portion itself can be increased and deformation can be suppressed.

The flange reinforcing tool of the present invention is
The clamping member has a split structure that can be opened and closed with one end as a fulcrum.
According to this feature, the flange portion of the holding member can be easily brought into contact with the outer peripheral surface of the flange by using a split structure that can be opened and closed with one end as a fulcrum.

(A) is a side view which shows the state which attached the flange reinforcement in Example 1 to the valve apparatus and the pipe line component, (b) is the side which shows the valve apparatus and pipe line component used as the attachment object of a flange reinforcement. FIG. (A) is a top view of the clamping member of the flange reinforcement in Example 1, (b) is AA sectional drawing of (a), (c) is BB sectional drawing of (a), (d) is It is CC sectional drawing of (a). 2A is a DD arrow view of FIG. 2A, FIG. 2B is an F arrow view of FIG. 2A, and FIG. 2C is an E arrow view of FIG. (A) is a top view which shows the state which couple | bonded the clamping member of the flange reinforcement tool with the coupling member, (b) is a figure which shows the state open | released by using one of the clamping members as a fulcrum. (A) is a side view of a flange reinforcement tool, (b) is a front view of a flange reinforcement tool. (A) is a top view which shows the attachment to a flange by releasing a flange reinforcement, (b) is a side view which shows the state which attached the flange reinforcement. (A) is a figure which shows the condition when the connection member of a flange reinforcement tool is tightened, (b) is a figure which shows the condition when the connection member of the conventional flange reinforcement tool is tightened. (A) is a side view which shows the state which attached the flange reinforcement in Example 2 to the valve apparatus and the pipe line component, (b) is a front view which shows the state which attached the flange reinforcement. (A) is a top view of the clamping member of the flange reinforcement in Example 2, (b) is GG sectional drawing of (a), (c) is HH sectional drawing of (a). (A) is a side view which shows the state which attached the flange reinforcement in Example 3 to the valve apparatus and the pipe line component member, (b) is a front view which shows the state which attached the flange reinforcement. It is a figure which shows the flange reinforcement tool in Example 3. FIG. These are the figures which show the state which attached the flange reinforcement tool in Example 4 to the valve apparatus and the pipe line component. (A) is a top view of one clamping member of the flange reinforcement in Example 4, (b) is the II arrow directional view of (a). (A) is a top view of the assembly state of the other clamping member of the flange reinforcement in Example 4, (b) is a top view of the disassembled state of this clamping member, (c) is a JJ arrow view of (b) FIG. (A) is a top view of the flange reinforcing tool in Example 4, (b) is a side view, (c) is a front view of one clamping member.

  A flange reinforcing tool according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the flange 4 c of the repair valve 4 is connected to the branch flange 3 c provided at the branch neck 3 b of the fluid pipe 3, and the flange 2 d of the fire hydrant 2 is connected to the flange 4 d of the repair valve 4. Then, the flange 4 c of the repair valve 4 and the flange 2 d of the fire hydrant 2 are coupled and reinforced by the flange reinforcing tool 10. Here, the repair valve 4 corresponds to the valve device according to the present invention, and the flanges 4c and 4d of the repair valve 4 correspond to both flanges of the valve device according to the present invention. Moreover, the fluid pipe 3 and the fire hydrant 2 correspond to the pipe line constituting member according to the present invention, and the branch portion flange 3c of the fluid pipe 3 and the flange 2d of the fire hydrant 2 correspond to both flanges of the pipe line constituting member according to the present invention. . In FIG. 1, the vertical direction corresponds to the pipe axis direction.

  Here, the fluid pipe 3 may be an existing fluid pipe or a new fluid pipe, is made of ductile cast iron embedded in the ground, is formed in a substantially circular shape in cross section, and the inner peripheral surface is covered with a mortar layer Has been. The fluid pipe according to the present invention may be made of other metals such as cast iron and steel, or made of asbestos, concrete, vinyl chloride, polyethylene, or polyolefin. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. In this embodiment, the fluid in the fluid pipe is clean water, but is not limited to clean water in this embodiment. For example, in addition to industrial water, agricultural water, sewage, etc., gas or gas-liquid mixture of gas and liquid It does not matter.

  As shown in FIG. 1A, the flange reinforcing tool 10 includes a first holding member 11 that holds the flange 2d of the fire hydrant 2 in the pipe axis direction, and a branch flange 3c of the fluid pipe 3 in the pipe axis direction. The second sandwiching member 14 sandwiched between the first sandwiching member 11, the connecting member 17 coupling the first sandwiching member 11 and the second sandwiching member 14, and the first sandwiching member 11 and the second sandwiching member 14 are integrally coupled to form an annular shape. The coupling member 18 is mainly configured.

  Hereinafter, the 1st clamping member 11 and the 2nd clamping member 14 are demonstrated. In addition, since the 1st clamping member 11 and the 2nd clamping member 14 have the same structure, the 1st clamping member 11 is demonstrated.

  As shown in FIG. 2, the first clamping member 11 includes divided clamping members 12 and 13 that are divided in the circumferential direction, and the divided clamping members 12 and 13 are connected by a coupling member 18 (see FIG. 1A). Coupled to a ring. In addition, in the present Example, although the Example which divided | segmented the 1st clamping member 11 into 2 was shown, you may divide | segment not only into this but into 3 or more divisions.

  The split sandwiching member 12 constituting the first sandwiching member 11 is composed of two projecting portions, and sandwiching portions 12a and 12a for sandwiching the flange 2d of the fire hydrant 2 in the pipe axis direction are directed radially inward. The sandwiching hooks 12c and 12c are formed so as to face radially outward at circumferential positions corresponding to the sandwiching parts 12a and 12a. And the clamping parts 12a and 12a and the clamping hook parts 12c and 12c are integrally formed by the connection part 12b extended in the arc shape along the outer periphery of the flange 2d of the fire hydrant 2, and the rigidity of the split clamping member 12 itself is determined. Improvements are being made. In this case, as long as the rigidity is maintained, the sandwiching portions 12a and 12a and the sandwiching flange portions 12c and 12c may be assembled as separate members and integrated. In addition, a pair of projecting portions 12d and 12e are formed radially outward in opposite directions at the circumferential end of the connecting portion 12b, and an insertion hole 12h through which the coupling member 18 is inserted into the projecting portions 12d and 12e. 12h (see FIG. 3A). Furthermore, ellipse-shaped insertion holes 12ch and 12ch are formed in the clamping hook portions 12c and 12c, and bolts 17a having an ellipsoidal head are inserted into the ellipse-shaped insertion holes 12ch and 12ch, The bolt 17a is prevented from rotating by an elliptical head. The shapes of the insertion holes 12ch and 12ch are not limited to ellipses, but may be other shapes such as a circle, a rectangle, and an oval shape.

  Similarly, the divided sandwiching member 13 constituting the first sandwiching member 11 includes two projecting portions, and sandwiching portions 13a and 13a for sandwiching the flange 2d of the fire hydrant 2 in the pipe axis direction are radially inward. The holding hooks 13c and 13c are formed so as to face radially outward at circumferential positions corresponding to the holding parts 13a and 13a. The sandwiching portions 13a and 13a and the sandwiching flange portions 13c and 13c are integrally formed by a connecting portion 13b extending in an arc shape along the outer periphery of the flange 2d of the fire hydrant 2, and the rigidity of the split sandwiching member 13 itself is determined. Improvements are being made. In this case, as long as the rigidity is maintained, the holding portions 13a and 13a and the holding hook portions 13c and 13c may be assembled as separate members and integrated. In addition, a pair of projecting portions 13d and 13e are formed radially outward in opposite directions at the circumferential end of the connecting portion 13b, and through-holes 13h and 13h through which the coupling member 18 is inserted into the projecting portions 13d and 13e. (See FIG. 3B). Furthermore, ellipse-shaped insertion holes 13ch, 13ch are formed in the holding hook portions 13c, 13c, and bolts 17a having an ellipsoidal head are inserted into the ellipse-shaped insertion holes 13ch, 13ch, The bolt 17a is prevented from rotating by an elliptical head. The shape of the insertion holes 13ch and 13ch is not limited to an ellipse, but may be other shapes such as a circle, a rectangle, and an oval shape.

  Further, as will be described later, the reaction force when the first clamping member 11 (divided clamping member 12) and the second clamping member 14 (divided clamping member 15) are tightened by the connecting member 17 is the support surface of the connecting portion 12b. 12k and the support surface 13k of the connection part 13b are comprised so that it can support by contacting the outer peripheral surface of the flange 2d of the fire hydrant 2, and the connection parts 12b and 13b function as a collar part of this invention (FIG. 7). reference).

  The projecting portion 12d of the split clamping member 12 is formed in an arc shape so as to taper outward in the radial direction (see FIG. 2A), and the projecting portion 12d has a groove 12f (FIG. 3C). )) Is formed. On the other hand, the protruding portion 13e of the divided clamping member 13 that faces the protruding portion 12d of the divided clamping member 12 is also formed in an arc shape so as to taper outward in the radial direction (see FIG. 2A). A protruding portion 13g (see FIG. 3C) is formed on the portion 13e. Similarly, the protruding portion 12e at the circumferential end of the split clamping member 12 is formed in an arc shape so as to taper outward in the radial direction, and a protruding portion 12g is formed on the protruding portion 12e (FIG. 2). (See (a)), the protruding portion 13d at the end in the circumferential direction of the divided clamping member 13 that faces the protruding portion 12e of the divided clamping member 12 is also formed in an arc shape so as to taper outward in the radial direction. A groove portion 13f (see FIG. 2A) is formed in the portion 13d.

  The split clamping members 12 and 13 have the above-described configuration, so that the groove portion 12f of the split clamping member 12 and the protruding portion 13g of the split clamping member 13 and the protruding portion 12g of the split clamping member 12 and the split clamping portion 13 are provided. Since the groove portions 13f are engaged with each other, the groove portions 13f can be easily assembled in an annular shape (see FIG. 2A). Then, the bolt 18a can be inserted into the insertion holes 12h, 12h, 13h, and 13h (see FIGS. 3A and 3B), and the bolt 18a and the nut 18b can be easily assembled into an annular shape (FIG. 4). (See (a)). The insertion holes 12h, 12h, 13h, and 13h are formed in an ellipse shape, and a bolt 18a having an elliptical head is inserted into the insertion holes 12h, 12h, 13h, and 13h. The bolt 18a is prevented from rotating by the head. The insertion holes 12h, 12h, 13h, and 13h are not limited to an ellipse, and may have other shapes such as a circle, a rectangle, and an oval shape.

  Further, as shown in FIG. 4B, in the state in which the bolt 18a and the nut 18b of one coupling member 18 are loosened and the other coupling member 18 is removed, the protrusion 12e of the split clamping member 12 is removed. The arcuate projecting portion 12g and the arcuate groove portion 13f of the projecting portion 13d of the split sandwiching member 13 are rolled to each other, and one of the circumferential end portions of the split sandwiching members 12 and 13 is closed. Since the other can be opened, even the divided clamping members 12 and 13 that are divided from each other can be handled integrally, so that they can be easily attached to the flange.

  As shown in FIGS. 2 and 3A, centering members 12m and 13m made of an elastic body are disposed on the support surfaces 12k and 13k of the connecting portion 12b and the connecting portion 13b, and the outer diameter of the flange 2d. It is designed to absorb dimensional variations. This is particularly effective when the rusting of the flange of the existing fluid pipe is severe.

  Next, a procedure for reinforcing the flange joint using the flange reinforcing tool 10 will be described.

  As shown in FIG. 5, the first clamping member 11 and the second clamping member 14 are opposed to each other with a predetermined interval, and are connected by a connecting member 17. In this state, as shown in FIG. 6, the first clamping member 11 and the second clamping member 14 are opened with the side on which one of the coupling members 18, 18 is attached as a fulcrum, and the flange 2d and the branch flange 3c of the fire hydrant 2 are opened. It attaches to (refer FIG.1 (b)), the coupling members 18, 18, ... are fastened and the 1st clamping member 11 and the 2nd clamping member 14 are integrated in cyclic | annular form. Finally, the connecting member 17 is tightened, and the branching flange 3c, the repair valve 4 and the flange 2d of the fire hydrant 2 are clamped by the first clamping member 11 and the second clamping member. Here, when the first holding member 11 is attached to the fire hydrant 2, notches 12p and 13p are provided so as not to interfere with the fire hydrant 2 and cannot be assembled (see FIG. 5B).

  The first clamping member 11 and the second clamping member 14 may be attached as follows without opening them with the side on which one of the coupling members 18 and 18 is attached as a fulcrum. That is, the first clamping member 11 and the second clamping member 14 are opposed to each other with a predetermined interval, and are connected by the connecting member 17. Then, the coupling members 18 and 18 that fasten the first clamping member 11 and the second clamping member 14 are loosened so that the outer diameters of the flange 2d and the branch flange 3c of the fire hydrant 2 can pass through, and the first clamping member 11 is loosened. And the second sandwiching member 14 may be attached to the flange 2d and the branching flange 3c of the fire hydrant 2 and then the coupling members 18, 18,.

  Furthermore, after attaching the 1st clamping member 11 to the flange 2d of the fire hydrant 2 and attaching the 2nd clamping member 14 to the branch part flange 3c, the 1st clamping member 11 and the 2nd clamping member 14 are connected by the connection member 17. May be integrated.

  Here, the behavior of the flange reinforcing tool 10 when the connecting member 17 is fastened and the branching flange 3c, the repair valve 4 and the flange 2d of the fire hydrant 2 are clamped by the first clamping member 11 and the second clamping member 14 will be described. .

  As shown in FIG. 7A, the pressing surface 12j of one split clamping member 12 of the first clamping member 11 abuts against the flange surface of the flange 2d in the pipe axis direction, and one of the second clamping members 14 The pressing surface 15j of the split clamping member 15 is in contact with the pipe axial flange surface of the branch flange 3c. Further, the support surface 12k of the connecting portion 12b of the split sandwiching member 12 is disposed to face the outer peripheral surface of the flange 2d, and the support surface 15k of the connecting portion 15b of the split sandwiching member 15 is disposed to face the outer peripheral surface of the branch flange 3c. Has been. When the connecting member 17 is tightened in this state, the split sandwiching members 12 and 15 generate a rotational force with the outer peripheral edges of the flanges 2d and 3c as fulcrums, and the support surface 12k of the split sandwiching member 12 and the support of the split sandwiching member 15 are supported. It is possible to prevent the pressing surface 12j of the clamping portion 12a of the split clamping member 12 and the pressing surface 15j of the clamping portion 15a of the split clamping member 15 from coming up from the flange surface by contacting the surface 15k with the outer peripheral surface of the flange. The pressing state of the flange surface in the road axis direction can be maintained.

  On the other hand, as shown in FIG. 7B, the branch portion flange 3c and the flange 2d are sandwiched by the conventional split sandwiching member 72 and the split sandwiching member 75 that are formed in a flat plate shape without providing a connecting portion. In this case, when the connecting member 77 is tightened, the split clamping member 72 rotates around the outer peripheral edge of the flange 2d, and the pressing surfaces 72j and 75j are lifted from the flange surface in the pipe axis direction of the flange 2d. The pressed state cannot be maintained.

  As shown in FIG. 7A, the length of the support surface 12k of the connecting portion 12b in the pipe axis direction is longer than the thickness of the flange 2d with which the support surface 12k contacts. The rotation of the split clamping member 12 can be restricted using the entire length of the support surface 12k of the connecting portion 12b in contact with the flange 2d. Moreover, the fastening reaction force by the connecting member 17 can be more efficiently supported by extending the length of the support surface 12k of the connecting portion 12b over the flanges 2d and 4d. At this time, the support surface 12k of the connecting portion 12b may be in contact with both the flanges 2d and 4d, or may be in contact with only the flange 4d.

  Next, the flange reinforcing tool according to the second embodiment will be described with reference to FIGS. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted.

  As shown in FIG. 8, the flange reinforcing tool 20 includes a pair of flanges 6 a, 6 a of fluid pipes 6, 6 as pipe line constituting members joined to both flanges 7 a, 7 a of the valve device 7 having flanges at both ends. The first clamping member 21 and the second clamping member 24 that sandwich the first clamping member 21 and a plurality of connecting members 27 that couple the first clamping member 21 and the second clamping member 24 are mainly configured.

  As shown in FIG. 9, the first clamping member 21 has a two-divided structure including divided clamping members 22 and 23, and the divided clamping members 22 and 23 are annularly formed by bolts 28 a and nuts 28 b as coupling members 28. It is configured integrally (see FIG. 8). Hereinafter, since the 1st clamping member 21 and the 2nd clamping member 24 have the same structure, the 1st clamping member 21 is demonstrated.

  In the first embodiment, the sandwiching portions 12a, 12a, 13a, and 13a that sandwich the flange are provided on both sides in the circumferential direction of the sandwiching flange portions 12c, 12c, 13c, and 13c. Clamping portions 22a and 23a for pressing the flange surface at one place are formed on the top and bottom portions of the members 22 and 23, respectively, so as to face radially inward. By arranging the clamping portions 22a and 23a in this way, the flange reinforcing tool 20 can be easily attached even if the flange has a small diameter.

  As in the first embodiment, also in the second embodiment, when the first holding member 21 and the second holding member 24 are tightened by the connecting member 27, the connecting portions 22b, 23b is in contact, the rotation of the first clamping member 11 and the second clamping member 14 with respect to the flange surface is restricted, and the first clamping member 21 and the second clamping member 24 are pressed against the flange surface without lifting from the flange surface. Can be maintained.

  Next, a flange reinforcing tool according to Example 3 will be described with reference to FIGS. 10 and 11. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted.

  As shown in FIG. 10, the flange reinforcing tool 31 includes a pair of flanges 6 a, 6 a of fluid pipes 6, 6 serving as conduit constituent members joined to both flanges 7 a, 7 a of the valve device 7 having flanges at both ends. The first clamping member 32 and the second clamping member 33 that sandwich the first clamping member 32 and the connecting member 37 that couples the first clamping member 32 and the second clamping member 33, and a predetermined number of flanges in the circumferential direction of the flange. Reinforcing tools 31, 31 'can be arranged to reinforce the flange joint. Even if the flange reinforcing tool 10 of Example 1 or the flange reinforcing tool 20 of Example 2 cannot be attached because there is an obstacle in the vicinity of the valve device 7 or the fluid pipe 6, the flange reinforcing tool 31 is not attached to the valve device 7, It can arrange | position around the flange 6a of the fluid pipe | tube 6, and the flange 6a of the fluid pipe | tube 6 can be clamped. In addition, in FIG. 10, illustration of the fastening member which fastens both the flanges 7a and 7a of the valve apparatus 7 and a pair of flanges 6a and 6a is abbreviate | omitted.

  As shown in FIG. 11, the first clamping member 32 and the second clamping member 33 have connecting portions 32b and 33b extending with a predetermined width in the circumferential direction, and the connecting portions 32b and 33b include fluid pipes. Support surfaces 32k and 33k that can come into contact with the outer peripheral surface of the sixth flange 6a are formed. Further, sandwiching portions 32 a and 33 a are extended so as to be orthogonal to the coupling portions 32 b and 33 b, and the sandwiching portions 32 a and 33 a have pressing surfaces 32 j and 33 j that press the flange 6 a of the fluid pipe 6.

  In the third embodiment, the pressing surface 32j of the first clamping member 32 and the pressing surface 33j of the second clamping member 33 are brought into contact with the flanges 6a and 6a so that the first clamping member 32 and the second clamping member are connected by the connecting member 37. When the member 33 is tightened, the connecting portions 32b and 33b come into contact with the outer peripheral surfaces of the flanges 6a and 6a, whereby the pressing surface 32j of the first clamping member 32 and the flange 6a of the pressing surface 33j of the second clamping member 33, The rotation with respect to 6a is controlled, and the pressing surface 32j and the pressing surface 33j can maintain the pressing state of the flange surface without lifting from the flanges 6a and 6a.

  Next, a flange reinforcing tool according to Embodiment 4 will be described with reference to FIGS. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted.

  As shown in FIG. 12, the flange reinforcing tool 40 sandwiches the flange 2d of the fire hydrant 2 joined to the flange 4d of the repair valve and the flange 3c of the fluid pipe 3 joined to the flange 4c of the repair valve. It mainly comprises a clamping member 41 and a second clamping member 51, and a plurality of connecting members 47 that connect the first clamping member 41 and the second clamping member 51. The flange connection can be reinforced by bringing the first holding member 41 into contact with the flange 2d of the fire hydrant 2 and bringing the second holding member 51 into contact with the flange 3c of the fluid pipe 3 and tightening the connecting member 47. it can.

  Although the division | segmentation aspect of the 1st clamping member in Example 1 and 2 and a 2nd clamping member is substantially the same, in the flange reinforcement tool 40 in Example 4, the shape of a fire hydrant and a repair valve, and the condition of surrounding structures Thereby, the division | segmentation aspect of the 1st clamping member 41 and the 2nd clamping member 51 can be changed.

  As shown in FIG. 13, the first clamping member 41 has a two-divided structure including divided clamping members 42 and 43. Projection portions 42d and 42d ′ having insertion holes 42dh are formed at one end portion of the divided sandwiching member 42 so as to be separated from each other in the pipe axis direction, and a screw hole 42eb is formed at the other end portion of the divided sandwiching member 42. A protruding portion 42e is formed. In addition, a protruding portion 43e having a screw hole 43eb is formed at one end of the divided clamping member 43, and protruding portions 43d and 43d ′ having an insertion hole 43dh are formed at the other end of the divided clamping member 43. They are formed apart from each other in the pipe axis direction. Then, the projecting portions 42d, 42d ′ and the projecting portion 43e are engaged, and the projecting portions 43d, 43d ′ and the projecting portion 42e are engaged, and the coupling member 48 is attached in the direction of the pipe axis of the fire hydrant 2 and is integrated in an annular shape. And can be externally fitted to the flange 2d of the digestive plug 2.

  On the other hand, as shown in FIG. 14, the second clamping member 51 has a two-divided structure composed of the divided clamping members 52 and 53, and a protrusion having an insertion hole at one end of the divided clamping member 52. A portion 52d is formed, and an end portion 52e having a screw hole is formed at the other end portion of the divided sandwiching member 52. In addition, an end 53e having a screw hole 53eb is formed at one end of the split clamping member 53, and a protrusion 53d having an insertion hole 53dh is formed at the other end of the split clamping member 53. Then, the protruding portion 52d of the divided clamping member 52 and the protruding portion 53d of the divided clamping member 53 are externally fitted to the end portion 53e of the divided clamping member 53 and the end portion 52e of the divided clamping member 52, and the coupling member 58 is connected in the pipe radial direction. Can be integrated into an annular shape.

  In this way, by changing the attachment mode of the coupling members 48 and 58, the coupling member 48 of the first holding member 41 can be attached and removed along the obstacle even if there is an obstacle in the pipe axis direction of the fire hydrant 2. Similarly, even if there is another obstacle in the radial direction of the fire hydrant 2, the coupling member 58 of the second clamping member 51 can be attached and detached along the other obstacle, so that depending on the situation of the obstacle The flange reinforcements 41 and 51 can be selected and attached easily (see FIG. 15).

  As shown in FIG. 12, also in the fourth embodiment, when the first clamping member 41 and the second clamping member 51 are tightened by the coupling member 47, the coupling portions 42 b and 43 b of the first clamping member 41 are supported. The surfaces 42k and 43k (see FIG. 13) and the support surfaces 52k and 53k of the connecting portions 52b and 53b of the second clamping member 51 are in contact with the outer peripheral surface of the flange 2d of the fire hydrant 2 and the outer peripheral surface of the flange 3c of the fluid pipe 3. Thus, the rotation of the first clamping member 41 and the second clamping member 51 with respect to the flange 2d and the flange 3c is restricted, and the first clamping member 41 and the second clamping member 51 are not lifted from the flange 2d and the flange 3c. The pressed state can be maintained.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, the valve device in the above embodiment may be a butterfly valve, a switching valve, a ball valve, a plug, or the like. In addition, the flange shape in the above embodiment is circular, but may be oval, oval, rectangular or the like.

2 Fire hydrant (conduit component)
2d Flange 3 Fluid pipe (Conduit component)
3c Branch flange (flange)
4 Repair valve (valve device)
4c Flange 4d Flange 6 Fluid pipe (duct component)
6a Flange 7 Valve device 7a Flange 7b Flange 10 Flange reinforcement 11 First clamping member (clamping member)
12 Divided clamping member 12b Connecting part (saddle part)
12j Contact surface 13 Divided clamping member 13b Connecting part (saddle part)
13j Contact surface 14 2nd clamping member (clamping member)
15 Divided clamping member 15b Connecting part (saddle part)
15j Contact surface 16 Divided clamping member 17 Connecting member 18 Connecting member 20 Flange reinforcement 21 First clamping member (clamping member)
22 division clamping member 22b connection part (saddle part)
23 Divided clamping member 23b Connecting part (saddle part)
23j Contact surface 24 2nd clamping member (clamping member)
27 connecting member 28 connecting member 31 flange reinforcing member 32 first clamping member (clamping member)
32b Connecting part (buttock)
32j Contact surface 33 2nd clamping member (clamping member)
33b Connecting part (buttock)
33j Contact surface 37 Connecting member 40 Flange reinforcement 41 First clamping member (clamping member)
42 Dividing and clamping member 42b Connecting part (saddle part)
42j Abutment surface 43 Divided clamping member 43b Connecting portion (saddle portion)
47 connecting member 48 connecting member 51 second clamping member (clamping member)
52 Divided clamping member 52b Connecting part (saddle part)
53 Divided clamping member 53b Connecting part (saddle part)
53j Abutment surface 58 Connecting member

Claims (4)

A pair of a flange provided on a branch neck extending in the vertical direction of a fluid pipe, which is one pipe constituent member, and a flange of the other pipe constituent member, which are respectively joined to both flanges of a repair valve having flanges at both ends. A flange reinforcing tool that reinforces the flange joint by connecting the pair of holding members with a connecting member.
Each of the pair of clamping members includes a contact surface that contacts a flange surface in the pipe axial direction of a flange of the pipe component member, and an outer peripheral surface of the flange or a flange of the repair valve that is joined to the flange. The flange portion that contacts at least one of the outer peripheral surfaces is integrally formed, and has a divided structure that is divided in the circumferential direction and annularly connected by a connecting member, and the connecting member is in the pipe axis direction A flange reinforcing tool that is detachably attached regardless of the obstacles in the pipe axis direction.   The flange reinforcing tool according to claim 1, wherein the flange portion extends in an arc shape in the circumferential direction.   The flange reinforcing tool according to claim 1 or 2, wherein each of the pair of clamping members has a protruding portion having an insertion hole for attaching the coupling member.   Each of the pair of clamping members is integrally formed with the flange portion and a plurality of extending flange portions along the circumferential direction so as to face the outer side in the radial direction than the flange portion. The flange reinforcing tool according to any one of claims 1 to 3, wherein the flange reinforcing tool is formed.

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