JP2008089043A - Pipe fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe fitting allowing reliable connection of pipes mutually by effectively following relative positional deviation of the pipes. <P>SOLUTION: The pipe fitting comprises an almost cylindrical pipe main body having flexibility, a pair of flanges provided on both ends of the pipe body, connected to the ends of opposite first and second pipes, and a plurality of stringy members to connect the flanges. Each flange comprises a plurality of flange pieces formed in an annular shape, by dividing, an ear having a connecting hole formed to connect the flanges, and a connecting bolt to connect the each flange piece. In the connecting bolt is formed a through-hole bored longitudinally. The stringy member has a string body inserted into the through-hole, a stopper provided on both end sides of the string body at a predetermined interval apart from the through-hole. The stopper has an adjusting mechanism capable of adjusting the predetermined interval. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pipe joint. In particular, the present invention relates to a flexible pipe joint.

  2. Description of the Related Art Conventionally, fluid pipes for transporting fluids include, for example, water distribution pipes and gas pipes disposed in buildings and various facilities. These pipes are connected via pipe joints in order to eliminate the deviation when the connecting portions of the pipes are displaced relative to each other. The pipe joint includes, for example, a flexible pipe body and flanges disposed at both ends of the pipe body. The tube main body is generally formed of a flexible material having elasticity such as rubber, and in order to increase the flexibility, for example, the outer periphery of the axial cross section of the tube main body is formed in a corrugated shape or a mountain shape. As a result, even if each pipe causes a relative positional shift, it is possible to follow this shift.

  However, the conventional pipe joint has a pipe body made of a flexible material such as rubber. For example, when a sudden tensile load or shear stress is applied due to a large-scale earthquake or the like, the pipe joint Could be damaged. Further, even when used for a long period of time, the load resistance against a tensile load, a shear stress, etc. is reduced due to deterioration of the rubber and the like, and there is a risk of breakage.

On the other hand, a pipe joint is disclosed in which flanges provided at both ends of the pipe joint are connected by tie rods, the pipe length in the axial direction of the pipe joint is maintained constant, and the strength against the axial load is enhanced. (For example, refer to Patent Document 1).
Japanese Utility Model Publication No.59-13785

  However, the pipe joint disclosed in Patent Document 1 can suppress the tensile load in the axial direction of the pipe joint, but is flexible for stress in a direction different from the axial direction due to the inclination of the pipe. It was not compatible. For example, when the pipe on the side to be connected due to ground subsidence or the like is decentered, the pipe joint is also inclined following this, so that the tie rod connected to the flange may be bent. In addition, since the pipe joint is inclined, the pipe is drawn into the pipe joint side, so that an excessive force is applied to the pipe joint, the pipe, and the tie rod, and each of them may be damaged.

  The present invention has been made in view of the above-described problems, and provides a pipe joint that effectively follows relative displacement between pipes and can reliably connect the pipes. The purpose is to do.

  In order to achieve the above-mentioned problems, the inventor uses a string-like member and connects a pair of flanges provided at both ends of the pipe joint with the string-like member, thereby providing a predetermined strength and a relative relationship between the pipes. The present invention has been completed by finding that each pipe can be effectively followed with respect to a general positional shift. Specifically, the following pipe joints are provided.

  (1) A pipe joint that connects a first pipe and a second pipe facing each other by mounting bolts, and is provided with a substantially cylindrical pipe body having flexibility, provided at both ends of the pipe body, and facing each other. A pair of flanges connected to end portions of the first pipe and the second pipe, and a plurality of string-like members connecting the flanges, the flange being formed in an annular shape and having a substantially center A plurality of flange pieces divided and formed along a line extending in the radial direction from the portion, and an ear portion provided at an end portion of each flange piece, in which a connection hole for connecting the flange pieces is formed, Inserting the connecting bolt through the connecting hole along the longitudinal direction of the pipe body, connecting the flange pieces, and the mounting hole for inserting the mounting bolt for connecting the first pipe and the second pipe; The connecting bolt and / or the front The mounting bolt is formed with a through hole penetrating in the longitudinal direction, and the string-like member is provided at a predetermined interval from the through hole on both ends of the string body and the string body inserted into the through hole. A pipe joint provided with an adjusting mechanism capable of adjusting the predetermined interval.

  According to the invention of (1), the pipe joint is provided at the both ends of the substantially cylindrical pipe body having flexibility and opposite ends of the pipe body, and is connected to the ends of the opposing first pipe and second pipe. And a plurality of string-like members connecting the flanges. Thereby, the 1st piping and 2nd piping which oppose can be connected reliably via a pipe joint. In addition, by using a flexible material for the pipe body, the pipe body can be deformed even if the pipes cause relative positional deviation or deformation due to inclination, etc. It becomes possible to follow. Further, since the flanges are connected by the string-like member, the string-like member can also follow this shift and the like, and the breakage of the string-like member can be prevented.

  The string-like member may be provided on one or both of a connecting bolt for connecting the divided flange pieces, or a mounting bolt for connecting the first pipe and the second pipe and the pipe joint facing each other. Good.

  In addition, the pipe joint connects the flange pieces by inserting a connecting bolt provided with a through-hole into the connecting hole, and the string-like member is inserted into the through-hole of the connecting bolt so that the pair of flanges are connected. Are connected. In this way, the flange pieces are joined together using the connecting bolt, and the pair of flanges are connected by the string-like member using the connecting bolt. That is, the connecting bolt has a function as a member for joining the flange pieces, and also has a function as a member for connecting the pair of flanges. Thereby, the number of parts of the pipe joint can be reduced, and the manufacturing cost can be reduced. Furthermore, the pipe joint does not integrally form a pair of flanges and the pipe body, but uses a separable flange formed from a plurality of flange pieces to engage the pipe body, so that it is necessary to mold a complicated mold. No mass production is possible at low cost.

  Further, since the distance between the stoppers provided at both ends of the string-like member is longer than the distance between the pair of flanges, for example, the first pipe or the second pipe is displaced by subsidence due to an earthquake or the like, and the pipe joint Even when the pipe body is deformed to extend in the axial direction, the maximum displacement amount of the pipe body is regulated by the string-like member, so that it is possible to prevent damage caused by the elongation of the pipe joint. For example, even if the pipe joint is bent due to ground subsidence or the like, the flange connected by the connecting bolt is slidable with respect to the string-like member. Can be adjusted, and pull-in of the counterpart piping can be prevented. Thereby, damage to a pipe joint and the 1st piping or the 2nd piping can be prevented.

  Further, the stopper has an adjustment mechanism capable of adjusting the amount of displacement of the pipe joint. Thereby, for example, it becomes possible to adjust the amount of displacement according to the situation of the installation place, the material of the flexible member used for the pipe body, etc., and the pipe joint can be used uniformly in various places. It becomes possible. In addition, for example, when the tube body is easily damaged due to deterioration of rubber or the like, it is possible to regulate the axial extension by setting the amount of displacement small and prevent the damage due to the extension. .

  (2) A pipe joint that connects the first pipe and the second pipe facing each other with a mounting bolt, and is provided with a substantially cylindrical pipe body having flexibility, provided at both ends of the pipe body, and facing each other. A pair of flanges connected to end portions of the first pipe and the second pipe, and a plurality of string-like members connecting the flanges, the flange being formed in an annular shape; And an attachment hole for connecting the first pipe and the end of the second pipe, and the insertion hole is inserted along the longitudinal direction of the pipe body, and the flange, the first pipe, and the second pipe The mounting bolt for connecting to the end of the cable, and the mounting bolt has a through-hole penetrating in the longitudinal direction, and the string-like member is inserted into the through-hole. And a predetermined interval from the through hole on both ends of the string body. It has a stop which is provided Te, and wherein the stopper, the pipe joint the adjustable control mechanism by a predetermined distance is provided.

  According to the invention of (2), the pipe joint is provided at the both ends of the substantially cylindrical pipe body having flexibility and the opposite ends of the pipe body, and is connected to the ends of the opposing first pipe and second pipe. And a plurality of string-like members that connect the flanges. As a result, the pipe joint allows the first and second pipes and the flanges to be inserted by inserting the mounting bolts provided with through holes through the mounting holes of the flanges and the bolt holes of the first and second pipes. Since the pair of flanges can be connected by inserting the string-like member through the through hole of the mounting bolt and connecting the first pipe and the second pipe facing each other through the pipe joint. Can do. In addition, by using a flexible material for the pipe body, the pipe body can be deformed even if relative displacement between pipes occurs or deformation due to inclination or the like occurs. It becomes possible to follow. Further, since the flanges are connected by the string-like member, the string-like member can also follow this shift and the like, and the breakage of the string-like member can be prevented.

  In addition, since the distance between the fasteners provided at both ends of the string-like member is longer than the distance between the flanges, the first pipe or the second pipe is displaced due to the subsidence or the like due to, for example, an earthquake as described above. However, even if the pipe body of the pipe joint is deformed to extend in the axial direction, the maximum displacement amount of the pipe body is regulated by the string-like member, so that damage caused by the extension of the pipe joint can be prevented. In addition, for example, even if the pipe joint is bent due to ground subsidence or the like, the flange connected by the mounting bolt is slidable with respect to the string member, so the displacement amount of the flange in each string member Can be adjusted, and pull-in of the counterpart piping can be prevented. Thereby, damage to a pipe joint and the 1st piping or the 2nd piping can be prevented.

  Further, the stopper has an adjustment mechanism capable of adjusting the amount of displacement of the pipe joint. Thereby, as described above, for example, it becomes possible to adjust the amount of displacement according to the situation of the installation location, the material of the flexible member used for the pipe body, etc. Can be used. In addition, for example, when the tube body is easily damaged due to deterioration of rubber or the like, it is possible to regulate the axial extension by setting the amount of displacement small and prevent the damage due to the extension. .

  (3) The adjustment mechanism includes a screw member fixed to both ends of the string body and a cap member that can be screwed to the screw member, and adjusts the screwing amount of the screw member and the cap member. The pipe joint according to (1) or (2), wherein the predetermined interval is adjusted.

  According to the invention of (3), the adjusting mechanism (stopper) includes a screw member and a cap member that can be screwed onto the screw member. The screw member is fixed to both ends of the string body, and the cap member is screwed into the screw member. And the displacement amount of a pipe joint can be adjusted by adjusting the screwing amount of these cap members and screw members. The screw member only needs to be fixed to the string body at a predetermined distance from the flange.

  (4) The pipe joint according to any one of (1) to (3), wherein the string body is formed by twisting a plurality of strands.

  According to the invention of (4), the string body is formed by twisting a plurality of strands. Thereby, the intensity | strength with respect to the tensile load etc. which arise in a string main body can be improved. Therefore, even if a tensile load or tension that can be received by the string main body that occurs when the pipes are displaced relative to each other or bent, they can be maintained constant and can be used over a long period of time.

  (5) The pipe joint according to any one of (1) to (4), wherein the string body is made of metal.

  According to invention of (5), a string main body is formed with a metal. As described above, since the metal has malleability and ductility, it is possible to prevent the string body from being broken even with respect to the relative displacement between the pipes and the tensile load and tension generated during bending.

  (6) The pipe joint according to any one of (1) to (5), wherein the string body is a wire rope.

  According to invention of (6), a string main body is formed with a wire rope. Thus, since the string main body used the wire rope, the disconnection by bending fatigue etc. can be suppressed. Thereby, durability improves and the string main body can be used over a long period of time.

  (7) The pipe joint according to any one of (1) to (6), wherein each of the flanges is formed with a plurality of depressions.

  According to the invention of (7), the flange includes a plurality of depressions. Thereby, the recessed portion can reduce the weight of the flange. Therefore, it is possible to reduce the weight of the entire pipe joint.

  According to the present invention, it is possible to provide a pipe joint that effectively follows a relative positional shift between pipes and can reliably connect the pipes.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, embodiment of this invention is not limited to the following embodiment at all, and the technical scope of this invention is not limited to this. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  FIG. 1 is a front view of a pipe joint according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a perspective exploded view of the connecting wire according to the embodiment of the present invention. FIG. 4 is a partially enlarged view of the connecting wire showing the adjusting mechanism according to the embodiment of the present invention. FIG. 5 is a perspective view showing another form of the connecting wire according to the embodiment. FIG. 6 is a cross-sectional view illustrating a state in which the pipe joint according to the embodiment is attached to the first pipe and the second pipe. FIG. 7 is a cross-sectional view showing another embodiment in which the string-like member is replaced with a connecting bolt in FIG. FIG. 8 is a cross-sectional view showing still another embodiment in which the string-like member is provided on both the connecting bolt and the mounting bolt in FIG. FIG. 9 is a front view of a pipe joint according to the second embodiment of the present invention. FIG. 10 is a cross-sectional view showing a state in which the pipe joint according to the second embodiment of the present invention is attached to the first pipe and the second pipe. FIG. 11 is a plan view illustrating a case where a relative positional shift occurs between the first pipe and the second pipe according to the embodiment. FIG. 12 is a plan view showing a state in which the relative positions of the first pipe and the second pipe according to the embodiment are inclined.

  As shown in FIGS. 1 and 2, the pipe joint 1 according to the first embodiment of the present invention includes a flexible tube body 2 that is a tube body, and a pair of flanges 3 provided at both ends of the flexible tube body 2. And two connecting wires 4 that are string-like members.

  The flexible tube main body 2 is formed in a substantially cylindrical shape, and includes a tubular portion 21 and flange portions 22 provided at both ends of the tubular portion 21. The cylindrical portion 21 is formed such that a substantially central portion in the axial direction bulges in a direction perpendicular to the axial direction. Specifically, the outer periphery of the cylindrical section 21 in the axial cross section is formed in a raised mountain shape. In the present embodiment, the flexible tube main body 2 has a mountain shape on the outer periphery in the axial cross section of the flexible tube main body. Any shape that can increase the flexibility of the flexible tube main body 2 may be used.

  The cylindrical portion 21 and the flange portion 22 are integrally formed with an elastic member 23 such as rubber in which a tire cord (reinforcing fiber) 23a such as nylon or polyester is embedded. Further, a metal reinforcing ring 24 is embedded in the collar portion 22. Thereby, the flexible tube main body 2 formed from the cylindrical part 21 and the collar part 22 has flexibility by the elastic member 23, and also has a predetermined pressure resistance. The elastic member 23 preferably covers the inner wall surface of a rubber layer made of synthetic rubber or the like with a material having excellent heat resistance and chemical resistance such as a fluororesin.

  The flange 3 is formed in an annular shape, and two arcuate flange pieces 31a and 31b, a connection hole 37 for connecting each of the flange pieces 31a and 31b, and the connection hole 37 are formed. Inserted into the ear part 32 and the connecting hole 37 and connected to the connecting bolt 33 for connecting each of the flange pieces 31a and 31b, and the pipe flanges 52 and 62 of the first pipe 50 and the second pipe 60 described later. The mounting hole 38 which is a fastening hole and the hollow part 39 formed thinly are provided.

  The flange 3 is divided into two flange pieces 31 a and 31 b along a line L extending in the radial direction from the center of the flange 3. Each flange piece 31a, 31b is provided with an engaging portion 25 formed to be thin so as to be engageable with the flange portion 22 of the flexible tube main body 2 along its inner periphery. In the engaging portion 25, the flange portion 22 of the flexible tube main body 2 and the flange pieces 31a and 31b are engaged. The engagement between the flange portion 22 of the flexible tube main body 2 and the flange pieces 31a and 31b is not limited to this, and the flange portion 31a and 31b may be engaged with the flange portion 22. That's fine.

  The ear | edge part 32 is each provided in the both ends of the flange pieces 31a and 31b. The ear 32 has a connection hole 37. The connection hole 37 is formed by communicating these ear portions 32 in an overlapping manner. Specifically, the ear portion 32 is formed so as to protrude outward with a thickness of approximately ½ of the thickness of the flange pieces 31a and 31b, and the adjacent ear portions 32 are arranged in the thickness direction. The connecting holes 37 are communicated with each other by overlapping with each other. The flange pieces 31 a and 31 b form an annular flange 3 by connecting a connection hole 37 provided in the ear portion 32 with a connection bolt 33.

  The mounting holes 38 are formed in the flange pieces 31a and 31b at predetermined intervals. In the present embodiment, the mounting hole 38 is formed with one circular hole at approximately the center of the flange pieces 31a and 31b, and two semicircular holes at both ends of the holes. These two holes form one hole when the flange pieces 31a and 31b are connected to each other. A mounting bolt 54 described later is inserted into the mounting hole 38, and the first pipe 50 and the second pipe 60 and the pipe joint 1 are fastened.

  The recessed portion 39 is formed between the mounting holes 38 in a recessed shape in the thickness direction of the flange pieces 31a and 31b. The recess 39 reduces the weight of the flange pieces 31a and 31b.

  The connecting bolt 33 includes a bolt member 34, a washer member 35, and a nut member 36. The connecting bolt 33 connects the flange pieces 31a and 31b by inserting the bolt member 34 through the connecting hole 37 and screwing the nut member 36 with the washer member 35 interposed therebetween. Thereby, each flange piece 31a, 31b is integrated and the annular flange 3 is formed. Further, the bolt member 34 is formed with a through hole 34a penetrating in the axial direction (see FIG. 3).

  As shown in FIGS. 3 and 4, the connecting wire 4 is provided at a wire rope 41, which is a string body formed by twisting a plurality of metal strands, and at both ends of the wire rope 41. A side stopper 42 as a stopper. The wire rope 41 is inserted into the through hole 34 a of each connecting bolt 33. Then, the connection bolt 33 is connected to the flange 3 in a state where the connection bolt 33 is inserted into the through hole 34 a of each connection bolt 33. Thereby, each flange 3 of the pipe joint 1 is connected by the connecting wire 4.

Both end portions of the wire rope 41 is stop as wire rope 41 is not come off at a position away by a predetermined distance D ₂ to the distal end side of the connecting bolt 33 (the direction opposite to the flexible pipe body in the axial direction) Side A stopper 42 is provided (see FIG. 2). The side stopper 42 includes a locking screw 43 that is a screw member and an adjustment cap 44 that is a cap member. The locking screw 43 is fixed to both ends of the wire rope 41. The locking screw 43 is male threaded. The adjustment cap 44 is internally threaded and is engaged with a locking screw 43 that is male threaded. Thus, the interval between the side stoppers 42 as the stopper is an adjustment mechanism that can be adjusted by screwing the adjustment cap 44 into the locking screw 43 as the screw member.

Predetermined distance D ₂ is, for example, when a predetermined inclination or if the first pipe 50 or the second pipe 60 first pipe 50 or the second pipe 60 has subsided by ground subsidence due occurs earthquake position by subsidence It is provided to follow the angular deformation due to deviation or inclination to absorb the extension of the flexible tube main body 2 and maintain the distance D ₁ (see FIG. 11) between the flanges 3 within a predetermined range. . Predetermined distance D ₂ can be adjusted by adjusting the screwing amount of the locking screw 43 and the adjustment cap 44 in the side stopper 42. The predetermined distance D ₂ is the design of the displacement of properties and absorption of the flexible tube body 2, the flexible tube body 2 may be suitably selected within a range of non expansion amount damage.

  In this embodiment, the locking screw 43 is fixed to the wire rope 41. However, the present invention is not limited to this, and the locking screw 43 may be provided so as to be movable on the wire rope. Further, the amount of displacement may be adjusted by adjusting the length of the adjustment cap 44.

  Further, as shown in FIG. 5, a center stopper 45 may be provided between the bolt member 34 and the other bolt member 34. The center stopper 45 is formed with a through hole 45a, and the wire rope 41 is inserted and attached to the through hole 45a. By providing the center stopper 45, the distance between the bolt member 34 and the other bolt member 34 is regulated, so that the flanges 3 are not pulled too much by deformation due to misalignment or the like, and the pipe joint 1 is crushed. It is possible to prevent the first pipe 50 and the second pipe 60 from being excessively pulled and damaged. The center stopper 45 is a rod-like member having a predetermined length shorter than the length of the pipe joint 1, and is movable between the bolt member 34 and the other bolt member 34.

  Further, in this embodiment, the string body of the string-like member is a wire rope. However, the present invention is not limited to this, as long as it has a strong strength against tensile force and can be deformed. For example, a wire is used. May be. When a wire is used, the screw may be cut directly instead of providing the locking screw 43 on the tip side of the wire. By directly cutting the screw, the number of parts can be reduced. Further, since the locking between the locking screw 43 and the bolt member 34 is eliminated, the displacement amount can be adjusted only by locking the adjustment cap 44 and the bolt member 34, so the maximum displacement amount of the pipe joint 1 is increased. It becomes possible.

  As shown in FIG. 6, the pipe joint 1 connects the first pipe 50 and the second pipe 60 that face each other. Each of the first pipe 50 and the second pipe 60 includes pipe tube portions 51 and 61 and pipe flange portions 52 and 62. Bolt holes 53, 63 are formed in the pipe flanges 52, 62. The mounting bolts 54 are inserted into the bolt holes 53, 63 and the mounting holes 38, respectively, and are fixed thereto. The two pipes 60 are connected via the pipe joint 1.

  Next, a procedure for attaching the pipe joint 1 to the first pipe 50 and the second pipe 60 will be specifically described.

  First, while the flange portions 22 provided at both ends of the flexible tube main body 2 are sandwiched between the arc-shaped flange pieces 31a and 31b, the ear portions 32 formed at the ends of the flange pieces 31a and 31b overlap each other. The flange pieces 31a and 31b are combined in an annular shape. Thereby, the collar part 22 is engaged with the engaging part 25 of the flexible tube main body 2 of the flange pieces 31a and 31b.

  Next, the bolt member 34 is inserted into the connection hole 37 formed in the ear portion 32, and screwed with the nut member 36 with the washer member 35 interposed therebetween. Thereby, each of the flange pieces 31a and 31b is united, and the flange 3 is formed. That is, a pair of flanges 3 are formed at both ends of the flexible tube main body 2.

Next, the wire ropes 41 are respectively inserted into the through holes 34 a of the bolt members 34 attached to the pair of flanges 3 to connect the flanges 3. Here, by inserting the side stopper 42 from both ends of the wire rope 41, a predetermined position, for example, from the distal end side of the connecting bolt 33 (the flexible tube in the axial direction body 2 opposite direction) by a predetermined distance D ₂ The locking screw 43 of the side stopper 42 is fixed to the distant position by welding or the like. The locking screw 43 is fixed in advance by welding or the like before the wire rope 41 is inserted into the through hole 34a of the bolt member 34 by making the outer diameter of the locking screw 43 smaller than the outer diameter of the bolt member 34. May be. As a result, the nut member 36 can freely pass through the locking screw 43.

  Next, the pipe joint 1 is disposed between the first pipe 50 and the second pipe 60 so that the mounting hole 38 of the flange 3 and the bolt holes 53 and 63 of the pipe flanges 52 and 62 communicate with each other. 38 and the bolt holes 53 and 63 are inserted into the bolt members 55 of the mounting bolts 54, and are screwed together by the nut members 57 with the washers 56 interposed therebetween. Thereby, each of the 1st piping 50 and the 2nd piping 60 is connected via pipe fitting 1.

  Next, another embodiment in which the string-like member 4 is provided on the mounting bolt 54 will be described with reference to FIG.

  In this embodiment, instead of the connecting bolt 33 in FIG. 6, a through hole 55a is formed in the mounting bolt 54, and as shown in FIG. The wire rope 41 is inserted into the through hole 55a of the mounting bolt 54 that connects the pipe 50 and the second pipe 60 to connect between the flanges 3. That is, as shown in FIG. 3, the bolt member 55 of the mounting bolt 54 is formed with a through hole 55a penetrating in the axial direction like the bolt member 34 of the connecting bolt 33 in the first embodiment. The wire rope 41 of the connecting wire 4 is inserted through 55a to connect between the flanges 3.

Next, a procedure for attaching the pipe joint 1 to the first pipe 50 and the second pipe 60 and attaching the connecting wire 4 will be specifically described with reference to FIG.
The pipe joint 1 is disposed between the first pipe 50 and the second pipe 60 so that the mounting hole 38 of the flange 3 and the bolt holes 53 and 63 of the pipe flanges 52 and 62 communicate with each other. The bolt member 55 of the mounting bolt 54 is inserted into each of the holes 53 and 63 and screwed with the nut member 57 with the washer member 56 interposed therebetween. Thereby, each of the 1st piping 50 and the 2nd piping 60 is connected via pipe fitting 1.

Next, the wire rope 41 is inserted through the through holes 55 a of the respective bolt members 55 to connect the flanges 3. Here, by inserting the side stopper 42 from both ends of the wire rope 41, a predetermined position, e.g., by a predetermined distance D ₂ from the front end side of the mounting bolts 54 (the flexible tube in the axial direction body 2 opposite direction side) The locking screw 43 of the side stopper 42 is fixed to the distant position by welding or the like. The locking screw 43 is fixed in advance by welding or the like before the wire rope 41 is inserted into the through hole 55a of the bolt member 55 by making the outer diameter thereof smaller than the outer diameter of the bolt member 55. May be. As a result, the nut member 57 can freely pass through the locking screw 43. Further, a center stopper 45 may be provided between the mounting bolt 54 and the other mounting bolt 54 as shown in FIG.

  Next, still another embodiment in which the string-like member 4 is provided on the mounting bolt 54 will be described with reference to FIG.

  In this embodiment, in FIG. 6, a through hole 34a and a through hole 55a are formed in each of the connecting bolt 33 and the mounting bolt 54, and as shown in FIG. 8, the connecting wire 4 which is a string-like member has a flange piece 31a. The flange 3 is inserted into the through hole 34a of the connecting bolt 33 that connects the flange piece 31b and the through hole 55a of the mounting bolt 54 that connects the pipe joint 1 to the first pipe 50 and the second pipe 60. It is intended to connect the two. That is, as shown in FIG. 3, the bolt member 34 of the connecting bolt 33 is formed with a through hole 34a penetrating in the axial direction, and the connecting wire 4 is inserted through the through hole 34a to connect between the flanges 3. . Further, a through hole 55a penetrating in the axial direction is formed in the bolt member 55 of the mounting bolt 54, and the connecting wire 4 is inserted into the through hole 55a to connect between the flanges 3.

  Since the fitting of the pipe joint 1 to the first pipe 50 and the second pipe 60 and the procedure of attaching the connecting wire 4 are the same as those described in the first embodiment and another embodiment, the description thereof is omitted.

  Next, a second embodiment of the pipe joint of the present invention will be described. In the pipe joint 1 according to the second embodiment of the present invention, in the first embodiment, the pair of flanges 3 provided at both ends of the flexible tube main body 2 have two arc-shaped flange pieces 31a as described above, As shown in FIG. 10, the connecting wire 4 that is an annular flange 3 that is not divided into 31 b is a string-like member, as in the other embodiment of the first embodiment, and the pipe joint 1 and the first pipe 50. And it inserts in the through-hole 55a of the mounting | wearing volt | bolt 54 which connects the 2nd piping 60, and connects between the flanges 3. FIG. That is, as shown in FIG. 3, the bolt member 55 of the mounting bolt 54 is formed with a through hole 55a penetrating in the axial direction like the bolt member 34 of the connecting bolt 33 in the first embodiment. The connecting wire 4 is inserted through 55 a to connect the flanges 3. In addition, the flexible tube main body 2 which is a tube main body is the same shape and structure as 1st Embodiment.

  As in the first embodiment, mounting holes 38 are formed in the flange 3 at predetermined intervals. A total of four circular holes are formed in the mounting holes 38, one at a position corresponding to approximately ¼ of the flange 3. A mounting bolt 54 described later is inserted into the mounting hole 38 (see FIG. 9).

  Further, a recess 39 is formed between the mounting holes 38 so as to be recessed in the thickness direction of the flange 3. The flange 39 reduces the weight of the flange 3 (see FIG. 9).

  The connecting wire 4 includes a wire rope 41 that is a string body formed by twisting a plurality of metal strands similar to those in the first embodiment, and a stopper provided at both ends of the wire rope 41. And a side stopper 42 (see FIG. 3). And the side stopper 42 which is a stopper has the adjustment mechanism similar to 1st Embodiment (refer FIG. 4). Further, a center stopper 45 may be provided between the mounting bolt 54 and the other mounting bolt 54 as shown in FIG.

  The mounting bolt 54 includes a bolt member 55, a washer member 56, and a nut member 57. The mounting bolt 54 allows the bolt member 55 to be inserted into the mounting hole 38 of the flange 3 and the bolt hole 53 of the first pipe 50 or the bolt hole 63 of the second pipe 60, and the nut member 36 is screwed together with the washer member 35 interposed therebetween. By doing so, the flange 3 and the pipe flange 52 or the pipe flange 62 are connected. Thereby, each of the 1st piping 50 and the 2nd piping 60 is connected via pipe fitting 1. Further, the bolt member 55 is formed with a through hole 55a penetrating in the axial direction (see FIG. 3).

  The connecting wire 4 is attached to the flange 3 in the same manner as in the first embodiment.

  As shown in FIG. 10, first, the pipe joint 1 is connected to the first pipe 50 and the second pipe 60 facing each other. Each of the first pipe 50 and the second pipe 60 includes pipe tube portions 51 and 61 and pipe flange portions 52 and 62. Bolt holes 53, 63 are formed in the pipe flanges 52, 62. The bolt member 55 of the mounting bolt 54 is inserted into each of the bolt holes 53, 63 and the mounting hole 38, and the washer member 56 is sandwiched therebetween. The first pipe 50 and the second pipe 60 are connected via the pipe joint 1 by being screwed and fixed by the nut member 57.

Next, the wire ropes 41 are respectively inserted into the through holes 55 a of the mounting bolts 54 to connect the flanges 3. Here, by inserting the side stopper 42 from both ends of the wire rope 41, a predetermined position, e.g., by a predetermined distance D ₂ from the front end side of the mounting bolts 54 (the flexible tube in the axial direction body 2 opposite direction side) The locking screw 43 of the side stopper 42 is fixed to the distant position by welding or the like. Thereby, each of the 1st piping 50 and the 2nd piping 60 is connected via pipe fitting 1. The locking screw 43 has an outer diameter smaller than the outer diameter of the bolt member 55 so that the nut member 57 can pass therethrough, and before the wire rope 41 is inserted into the through hole 55a of the mounting bolt 54. It is preferable to fix in advance by welding or the like. This reduces the on-site welding work.

  Next, the operation of the pipe joint 1 will be described.

FIG. 11 shows a state in which the first pipe 50 and the second pipe 60 connected via the pipe joint 1 according to the present embodiment cause a relative displacement in the direction B of FIG. As shown in FIG. 11, when the first pipe 50 and the second pipe 60 are displaced from each other in the direction B in FIG. 11, the flexible pipe body 2 of the pipe joint 1 is also deformed following this. Here, since the flange 3 is slidably provided with respect to the wire rope 41, the flange 3 slides. For example, to slide by a predetermined distance _{D 2.} Accordingly, the first pipe 50 and the second pipe 60 connected to the pipe joint 1 are not drawn into the pipe joint 1 side, and there is no possibility that the pipe joint 1, the first pipe 50, and the second pipe 60 are damaged. Moreover, since the maximum displacement amount in the axial direction of the flexible tube main body 2 is regulated by the side stopper 42 provided with the wire rope 41, the flexible tube main body 2 can be prevented from being damaged.

  FIG. 12 shows a state in which the relative positions of the first pipe 50 and the second pipe 60 connected via the pipe joint 1 according to the present embodiment are inclined in the direction C of FIG. As shown in FIG. 12, when the first pipe 50 and the second pipe 60 are inclined in the direction C of FIG. 12, the flexible pipe body 2 of the pipe joint 1 is deformed following this, and one of the wire ropes 41 is also deformed. However, I am nervous following this. That is, one of the wire ropes 41 resists deformation of the flexible tube body 2. Specifically, in FIG. 12, when the relative position of the first pipe 50 and the second pipe 60 is inclined in the direction C in FIG. 12, one side (for example, the upper side) of the flexible tube main body 2 follows that. The connecting wire 4 is tensioned in a state where it is extended by a predetermined amount, and further extension is restricted. As a result, the maximum amount of displacement of the length of the flexible tube main body 2 is maintained between the side stoppers 42 that are in a range in which the flexible tube main body 2 is not damaged, so that the flexible tube main body 2 is prevented from being damaged.

  According to the present invention, the pipe joint 1 is provided at both ends of the flexible tube body 2 having flexibility and a substantially cylindrical flexible tube body 2, and the first pipe 50 and the second pipe 60 facing each other. A pair of flanges 3 connected to the end portions and a plurality of connecting wires 4 connecting the flanges 3 to each other are provided. Thereby, the 1st piping 50 and 2nd piping 60 which oppose can be connected reliably via the pipe joint 1. FIG. Further, by using a flexible material for the flexible tube body 2, the first pipe 50 and the second pipe 60 may be displaced relative to each other or may be deformed due to an inclination or the like. Since the flexible tube main body 2 can be deformed, it is possible to follow a deviation or an inclination. Further, since the flanges 3 are connected to each other by the connecting wire 4, the connecting wire 4 can follow this shift and the like, and the damage to the connecting wire 4 can be prevented.

  Further, the pipe joint 1 connects the flange pieces 31a and 31b by inserting the connecting bolt 33 provided with the through hole 34a into the connecting hole 37, and connects the connecting wire 4 to the through hole 34a of the connecting bolt 33. The pair of flanges 3 are connected by being inserted. Thus, the flange pieces 31 a and 31 b are joined together using the connection bolt 33, and the pair of flanges 3 are connected by the connection wire 4 using the connection bolt 33. That is, the connecting bolt 33 has a function as a member for joining the flange pieces 31 a and 31 b, and also has a function as a member for connecting the pair of flanges 3. Thereby, the number of parts of the pipe joint 1 can be reduced, and the manufacturing cost can be reduced. Furthermore, the pipe joint 1 does not integrally form the pair of flanges 3 and the flexible tube main body 2, but allows the splitable flange 3 formed by the plurality of flange pieces 31 a and 31 b to engage with the flexible tube main body 2. Since it is used, it is not necessary to mold a complicated mold, and mass production is possible at low cost.

  Further, since the distance between the side stoppers 42 provided at both ends of the connecting wire 4 is longer than the distance between the pair of flanges 3, the first pipe 50 or the second pipe 60 is displaced due to, for example, an earthquake. Even if the flexible tube main body 2 of the pipe joint 1 is deformed to extend in the axial direction, the maximum displacement amount of the flexible tube main body 2 is restricted by the connecting wire 4. Can be prevented. Further, for example, even if the pipe joint 1 is eccentric due to ground subsidence or the like, the flange 3 is slidably provided on the connecting wire 4 and the amount of displacement can be adjusted. Therefore, the counterpart first pipe 50 or second pipe It is possible to prevent 60 pull-in. Thereby, damage to the pipe joint 1 and the 1st piping 50 or the 2nd piping 60 can be prevented.

  Further, the side stopper 42 has an adjustment mechanism that can adjust the amount of displacement of the pipe joint 1. Thereby, for example, it becomes possible to adjust the amount of displacement according to the situation of the installation place, and it becomes possible to use the pipe joint 1 uniformly in various places. Further, for example, when the flexible tube main body 2 is easily damaged due to deterioration of rubber or the like, it is possible to prevent damage due to axial elongation by setting the displacement amount small.

  The case where the connecting wire 4 is inserted into the through hole 34a of the connecting bolt 33 that connects the flange 3 and the flanges 3 are connected to each other has been described. However, the connecting wire 4 is inserted into the through hole 55a of the mounting bolt 54 and the flange is connected. Even when three are connected, the same operation is performed.

  According to the present invention, the side stopper 42 includes a locking screw 43 and an adjustment cap 44 that can be screwed into the locking screw 43. The locking screw 43 is fixed to both ends of the connecting wire 4, and the displacement amount of the pipe joint 1 can be adjusted by adjusting the screwing amount of the adjustment cap 44 and the locking screw 43.

  According to the present invention, the string body is formed by twisting a plurality of strands. Thereby, the intensity | strength with respect to the tensile load etc. which arise in the flexible tube main body 2 can be improved. Therefore, even if a tensile load or tension that can be received by the flexible tube main body 2 that occurs when the first pipe 50 and the second pipe 60 are displaced relative to each other or bent, the first pipe 50 and the second pipe 60 can be maintained constant and can be maintained for a long time. Enables widespread use.

  According to the present invention, the string body is made of metal. As described above, since the metal has malleability and ductility, the string main body is prevented from being broken even when the first pipe 50 and the second pipe 60 are displaced relative to each other or against a tensile load or tension generated during bending. It becomes possible to do.

  According to the present invention, the string body is formed of a wire rope. Thus, since the string main body used the wire rope 41, the disconnection by bending fatigue etc. can be suppressed. Thereby, the string-like member has improved durability and can be used for a long period of time.

  According to the invention, the flange 3 comprises a plurality of depressions. As a result, the recessed portion can reduce the weight of the flange 3. Therefore, the weight of the entire pipe joint 1 can be reduced.

  In the present embodiment, the flange 3 is formed from two arc-shaped flange pieces 31a and 31b and is not divided into arc-shaped flange pieces. You may form from the above flange piece. Moreover, in this embodiment, although the flange 3 was made into the annular | circular shape, you may make it not only this but a polygonal shape. Moreover, although the flexible tube main body 2 was made into elastic members, such as a rubber layer, it is good also as not only this but a metal bellows tube.

It is a front view of a pipe joint concerning a 1st embodiment of the present invention. It is AA sectional drawing of FIG. It is a perspective exploded view of the connecting wire according to the embodiment. It is the elements on larger scale of the connection wire which concerns on the said embodiment. It is a perspective view which shows another form of the connection wire which concerns on the said embodiment. It is sectional drawing which shows the state with which the pipe joint which concerns on the said embodiment was mounted | worn with 1st and 2nd piping. In FIG. 6, it is sectional drawing which shows another form which changed the string-like member into the connection bolt and was provided in the attachment bolt. In FIG. 6, it is sectional drawing which shows another carrying | supporting which provided the string-like member in both the connection bolt and the attachment bolt. It is a front view of the pipe joint which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the state with which the pipe joint which concerns on the 2nd Embodiment of this invention was mounted | worn with 1st piping and 2nd piping. It is a top view which shows the case where the relative position shift of the 1st piping and 2nd piping which concern on the said embodiment arises. It is a top view which shows the state in which the relative position of the 1st piping and 2nd piping which concern on the said embodiment inclined.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe joint 2 Flexible pipe body 3 Flange 4 Connecting wire (string-like member)
31a, 31b Flange piece 32 Ear 33 Connecting bolt 34a Through hole 38 Mounting hole 41 Wire rope 42 Side stopper (stopper)
43 Locking screw (screw member)
44 Adjustment cap 50 First piping 52 First piping flange 54 Mounting bolt 55a Through hole 60 Second piping 62 Second piping flange

Claims (7)

A pipe joint that connects the first pipe and the second pipe facing each other with a mounting bolt,
A substantially cylindrical pipe body having flexibility, a pair of flanges provided at both ends of the pipe body and connected to opposite ends of the first pipe and the second pipe, and connecting the flanges A plurality of string-like members,
The flange is formed in an annular shape, and is provided at a plurality of flange pieces divided along a line extending in a radial direction from a substantially central portion, and provided at an end portion of each flange piece. Ears in which connection holes for connection are formed, connection bolts that pass through the connection holes along the longitudinal direction of the pipe body, and connect the flange pieces to each other, the first pipe, and the second pipe A mounting hole for inserting the mounting bolt to connect
A through hole penetrating in the longitudinal direction is formed in the connection bolt and / or the mounting bolt,
The string-like member has a string body inserted into the through hole, and a stopper provided at a predetermined interval from the through hole on both end sides of the string body,
A pipe joint in which the stopper is provided with an adjustment mechanism capable of adjusting the predetermined interval. A pipe joint that connects the first pipe and the second pipe facing each other with a mounting bolt,
A substantially cylindrical pipe body having flexibility, a pair of flanges provided at both ends of the pipe body and connected to opposite ends of the first pipe and the second pipe, and connecting the flanges A plurality of string-like members,
The flange is formed in an annular shape, and a mounting hole for connecting the flange to the ends of the first pipe and the second pipe, and the mounting hole along the longitudinal direction of the pipe body The mounting bolt that is inserted and connects the flange and the ends of the first and second pipes;
The mounting bolt is formed with a through hole penetrating in the longitudinal direction,
The string-like member has a string main body inserted into the through hole, and a stopper provided at a predetermined interval from the through hole on both ends of the string main body,
A pipe joint in which the stopper is provided with an adjustment mechanism capable of adjusting the predetermined interval. The adjustment mechanism includes a screw member fixed to both ends of the string body, and a cap member that can be screwed to the screw member.
The pipe joint according to claim 1 or 2, wherein the predetermined interval is adjusted by adjusting a screwing amount between the screw member and the cap member.   The pipe joint according to any one of claims 1 to 3, wherein the string body is formed by twisting a plurality of strands.   The pipe joint according to any one of claims 1 to 4, wherein the string body is made of metal.   The pipe joint according to any one of claims 1 to 5, wherein the string body is a wire rope. The pipe joint according to any one of claims 1 to 6, wherein a plurality of depressions are formed in each of the flanges.

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