WO2011074498A1 - ハウジング形管継手 - Google Patents
ハウジング形管継手 Download PDFInfo
- Publication number
- WO2011074498A1 WO2011074498A1 PCT/JP2010/072259 JP2010072259W WO2011074498A1 WO 2011074498 A1 WO2011074498 A1 WO 2011074498A1 JP 2010072259 W JP2010072259 W JP 2010072259W WO 2011074498 A1 WO2011074498 A1 WO 2011074498A1
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- WIPO (PCT)
- Prior art keywords
- joint
- arc
- housing
- arc portion
- type pipe
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/06—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends
- F16L21/065—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends tightened by tangentially-arranged threaded pins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/002—Sleeves or nipples for pipes of the same diameter; Reduction pieces
- F16L21/005—Sleeves or nipples for pipes of the same diameter; Reduction pieces made of elastic material, e.g. partly or completely surrounded by clamping devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L17/00—Joints with packing adapted to sealing by fluid pressure
- F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
- F16L17/04—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket with longitudinally split or divided sleeve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L17/00—Joints with packing adapted to sealing by fluid pressure
- F16L17/06—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between the end surfaces of the pipes or flanges or arranged in recesses in the pipe ends or flanges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/12—Joints for pipes being spaced apart axially
Definitions
- the present invention relates to a housing type pipe joint that connects pipe ends while sealing each other.
- FIG. 13 shows a conventional housing-type pipe joint 100H.
- the pipe ends of pipes 150 and 150 having circumferential grooves 151 and 151 at the pipe end portions are concentrically abutted with each other, and an annular elastic seal ring 102 is externally fitted to the joint portion.
- a pair of substantially semicircular joint segments 101, 101 are formed on the inner peripheral surface of the pipe end portion via the elastic seal ring 102 so that the ridges 113, 113 are accommodated in the circumferential grooves 151, 151.
- the two fastening portions 101 and 101 are formed by screwing fastening means including bolts 103 and 103 and nuts 104 and 104 into the bolt insertion holes 121 and 121 provided in the flange portions 120 and 120 facing each other of the joint segments 101 and 101, respectively. Connect the tubes together.
- the flanges 120 and 120 facing the pair of joint segments 101 and 101 are brought close to each other by the fastening means 103 and 104, so that the curvature radii of the joint segments 101 and 101 are reduced.
- the peripheral edges 114, 114 hold the outer surfaces 152, 152 of the respective pipe outer surfaces (in the illustrated example, the bottom of the circumferential groove 151 is not necessarily limited to this), but the displacement of the pipe axes of the two pipes can be reduced. Displacement is prevented.
- the confirmation of the completion of the connection in the housing-type pipe joint 100H is set when the entire range of the peripheral end edges 114, 114 of the joint segments 101, 101 coincides with the pipe outer surfaces 152, 152, or in advance. It is assumed that the specified tightening torque is achieved using a torque wrench.
- the main problem of the present invention is to reduce the fastening work and to reliably perform the pipe connection in the housing-type pipe joint that connects the pipes by bending so that the radius of curvature of the arc portion is reduced by fastening means such as bolts and nuts. It is possible to check the fastening end position where the pipes are connected, and it is possible to easily install the pipes at appropriate positions between the pipe ends without disassembling the housing. Furthermore, it is possible to reliably connect and fix both pipes even if there is an error in the depth of the circumferential groove of the pipes to be connected.
- a housing-type pipe joint that connects pipes facing each other, A fastening means for fastening the pair of joint segments, the elastic seal ring, and the pair of joint segments;
- the joint segment has an arc portion, a flange portion extending from both ends of the arc portion, and a concave groove formed on the inner peripheral surface of the arc portion and into which the elastic seal ring is fitted.
- a housing-type pipe joint configured to complete the connection of It has a mark on the peripheral edge of the arc portion, and is configured so that the connection between the tubes is completed when a portion of the peripheral edge of the arc portion corresponding to the mark contacts the outer surface of the pipe Housing type pipe joint.
- a mark is positioned on each end side, it is possible to prevent a left-right shift.
- “corresponding to the mark” means that the mark itself is not in contact with the outer surface of the pipe, but for example, the mark is an arrow or the like, and the position indicated by the arrow or the like includes being in contact with the outer surface of the pipe. Is.
- the housing type pipe joint is for connecting and fixing pipes having circumferential grooves at the pipe ends,
- the joint segment has a ridge portion located in the circumferential groove on the inner peripheral surface of the arc portion, And each joint segment is rotated in the opposite direction with the approach between the facing flanges by the fastening means, 2.
- the pipe joint of the present invention can connect the pipes while ensuring the expansion and contraction flexibility of the pipe line.
- a housing type pipe joint comprising a pair of joint segments, an elastic seal ring, and fastening means for fastening flanges of the pair of joint segments, and connecting and fixing pipes having circumferential grooves at the pipe ends,
- the fastening means approximates the flanges of the joint segments
- the joint segment includes an arc portion, a flange portion extending from both ends of the arc portion, a concave groove formed on the inner peripheral surface of the arc portion and into which the elastic seal ring is fitted, and both sides of the concave groove on the inner peripheral surface of the arc portion.
- the circumferential edge of the arc portion bends in a direction that coincides with the outer surface of the pipe to be connected, and the joint segment rotates in the direction in which the axis of the arc portion is parallel to the tube axis and in the opposite direction,
- the protruding portion presses against the distal end side wall and the proximal end side wall of the circumferential groove,
- a housing-type pipe joint characterized in that the connection between pipes is completed.
- the housing-type pipe joint according to the present invention when the portion of the circular arc peripheral edge corresponding to the mark is in contact with the outer surface of the pipe, the protruding portion is the distal end side wall and the proximal end of the circumferential groove. Since it is pressed against the side wall, after the housing-type pipe joint is fastened, it is securely fixed in a state where the movement of the pipe to be connected in the direction approaching or moving away is restricted.
- the arc edge is set to the outer surface of the pipe from the arc center of the arc at the edge. It can be in contact with a perpendicular line toward the center in the range of 30 to 120 degrees. And if this range touches, it will be sufficient for connection fixation, and the reduction of a fastening work burden will also be sufficient.
- the elastic seal ring has an annular piece extending between the pipe end faces of the pipes to be connected, extending to the inner peripheral side, and the axis of the annular piece is not parallel to the axis of the joint segment.
- the elastic seal ring held in the housing has an annular piece. Since this annular piece extends to the inner peripheral side of the elastic seal ring, the pipe end face can be brought into contact with both sides of the annular piece (both ends of the elastic seal ring), and the housing can be seen without visual confirmation.
- the elastic seal ring can be reliably positioned at a desired position of the shape pipe joint.
- the elastic seal ring is pre-supported in the concave groove of the joint segment, when the pipe end surface is brought into contact with both sides of the annular piece (both ends of the elastic seal ring), the joint segment is Since it is positioned between the parts, the preparation for tightening can be completed very easily.
- the housing type pipe joint of the present invention is in a state where the axis of the annular piece is not parallel to the axis of the joint segment, that is, the axis of the annular piece is held inclined with respect to the axis of the joint segment. Therefore, the joint segment is in a state before the predetermined rotation and the installation preparation is completed only by bringing the pipe end face into contact with both sides of the annular piece.
- the elastic seal ring is supported in the concave groove, and when the joint segment is rotated, the elastic seal ring is pressed by the concave groove wall with the rotation.
- the rotation of the joint segment is not restricted by the deformability of the elastic seal ring, and the elastic seal ring is not twisted by the rotation of the joint segment.
- the elastic seal ring has a lip seal mechanism that has a groove portion between the annular piece and the opening edge at both ends, and the groove width is expanded by the pressure of the fluid flowing through the groove portion, the elastic seal ring is elastic. Even if the seal ring is not always in contact with the tube under pressure, the width of the groove is expanded between the annular piece and the opening edge of both ends when necessary, so that the sealing function is exhibited. This is a housing-type pipe joint with little deterioration and high durability.
- the housing type pipe joint of the present invention has an L-shaped projecting ridge and an L-shaped defective portion formed continuously with the L-shaped projecting ridge so that they can be fitted together, and the stamped joint that restricts the movement of each other is connected. Because it is formed, the joint segment does not over-rotate, and the housing-type pipe joint can be set securely at the desired position, and the elastic seal ring twisting, ridge damage, and pipe damage due to over-rotation are prevented. Is done.
- the housing type pipe joint of the present invention is commonly bent so that the radius of curvature of the arc portion is reduced by a fastening means such as a bolt and nut.
- a fastening means such as a bolt and nut.
- this housing-type pipe joint has a specific effect that allows both pipes to be reliably connected even if there is an error in the depth of the circumferential groove of the pipe to be connected. Furthermore, the housing-type pipe joint of the present invention can be connected while sealing the ends of both pipes while restricting the movement of the pipes to approach each other and allowing a slight movement of the pipes to be separated. Since the pipes can be connected with play, the expansion and contraction flexibility of the pipe line can be secured, and for example, it is suitable for connection between underground pipes having many opportunities to receive external force.
- a housing-type pipe joint is also provided in which the protrusions can securely connect and fix both pipes by fixing the distal end side wall and the proximal end side wall of the circumferential groove by pressing.
- the housing type pipe joint H of this embodiment includes a pair of joint segments 1, 1, an annular elastic seal ring 2, and a bolt 3 and a nut 4 that are fastening means for fastening the joint segments 1, 1 together.
- the shape of the pair of joint segments 1 and 1 is the same. Therefore, in the description of the shape, one joint segment 1 is taken as an example.
- the joint segment 1 has a substantially arc-shaped arc portion 10 in which ends of facing tubes 50 and 50 are accommodated, and flange portions 20 and 20 extending outward from both ends of the arc portion 10 respectively.
- the flange portions 20 and 20 are formed with bolt insertion holes 21 and 21 for inserting the bolts.
- the bolt insertion hole 21 is formed in an elliptical long hole whose major axis is the axial direction of the arc portion of the joint segment 1, and has a width having an appropriate margin with respect to the screw portion of the bolt that is also inserted in the minor axis direction.
- the bolt 3 can be loosely inserted into the bolt insertion hole 21.
- the arc portion 10 as a whole is formed in advance with a radius of curvature slightly larger than the diameter of the pipe 50 to be connected in advance, and the pipe end of the pipe 50 to be connected is easily and reliably positioned in the arc portion 10. Configured to be able to.
- the arc portion 10 is bent by tightening the nut 4 with respect to the bolt 3 via the flange portion 20, and the radius of curvature thereof is slightly reduced, and the arc portion peripheral edge 10E is positioned in the arc portion by the bending. It is comprised so that the site
- the contact of the peripheral edge of the arc portion in the present invention with the outer surface is one of the essential functions of restricting the movement of the housing-type joint to the pipe and securely fastening the inner peripheral surface of the arc portion.
- joint segments 1 and 1 of the present embodiment are integrally formed with the flanges 20 and 20 with a slight acute angle with respect to the arc portions 10 and 10 ends, as is apparent from the front view shown in FIG. Further, it is configured such that a bending force is easily applied so that the radius of curvature of the arc portions 10 and 10 is reduced.
- the mark 10M is characteristically formed at both arc ends of the arc portion peripheral end edge 10e, and the arc portion peripheral end edge 10E corresponding to the mark 10M is formed.
- the circular arc peripheral edge 10e is the vicinity of the circular arc peripheral edge 10E, and is a portion that can be visually recognized at least in a front view of the housing joint.
- the mark 10M is cut out in a predetermined range with both flange part side ends of the circular arc peripheral edge 10e of the joint segment 1 as a base point 11a, and the end 11b of the notch part 11 is the mark 11b. 10M.
- the notch end 11b is used as a mark in this way, the force for bringing the flange portions closer due to the presence of the notch portion 11 is reduced, and the amount (length) and position of the circumferential edge 10E in contact with the arc portion are reduced. Becomes very easy to check visually, and the burden of fastening work is surely reduced.
- the mark 10M based on the notch 11 is desirable from the viewpoint of durability because there is no fear of paint peeling or the like as compared with a mark by coating or the like. Furthermore, the mark 10M based on the notch portion 11 is desirable in that it can be confirmed by touch with a hand or the like.
- the mark 10M is not limited to the shape of the notch, and for example, as shown in FIGS. It may be a mode in which scales or letters are provided in the entire peripheral part of the week or part thereof. Of course, also in this case, the specific configuration can be confirmed visually or by touch, such as painting (printing) and protrusions.
- a preferable position of the mark 10M is a position within a range of 15 to 60 degrees (this range is indicated by ⁇ in FIG. 3) with respect to the perpendicular L1 from the arc center 10c of the arc portion 10 to the center of the arc portion. It is.
- this position at the time of completion of the fastening, at least the range of 30 to 120 degrees of the arc edge 10E (this range is indicated by ⁇ in the figure) is in contact with the outer surface of the pipe 50 to be connected, Usually, if the range ⁇ is approximately equal, the pipe 50 and the joint segment 1 will not be displaced after completion of the fastening.
- the position is 60 degrees or more, that is, even if it coincides with the outer surface of the pipe 50 to be connected within the range of 120 degrees or more of the circumferential edge 10E of the arc portion, the effect of preventing the displacement of the pipe 50 and the joint segment 1 is enhanced. However, the force for fastening is excessively increased, and an unnecessary work amount force is required.
- the housing type pipe joint H of the present embodiment adopts the following preferable configuration while having the characteristic mark 10M.
- the arc portion 10 has a concave groove 13 for accommodating the elastic seal ring 2 extending from one arc end to the other arc end.
- the width of the concave groove 13 is substantially equal to or slightly wider than the width of the elastic seal ring 2, and is formed to a depth that allows the elastic seal ring 2 to be fitted.
- the point-symmetric reference point is basically the center point in the width direction and the axial direction of the arc portion 10, but an appropriate reference point is set depending on the design error, the structure of the groove, and other configurations. can do. Due to the presence of the bulging portion 13 ⁇ / b> A, the elastic seal ring 2 is fitted into the concave groove 13 with a predetermined angle with the axial center of the arc portion 10 of the joint segment 1.
- the bulging portion 13A is preferably non-bulged on the side wall of the groove to improve the removal of the groove 13 portion from the mold.
- a continuous wall is formed from the portion 13B, more preferably a smooth continuous surface.
- the elastic seal ring 2 is elastically deformed along the side wall of the groove 11 when the elastic seal ring 2 is placed in the groove 13.
- the elastic seal ring 2 is supported by the entire groove wall. Therefore, the elastic seal ring 2 is not partially supported and housed in an unstable concave groove, and stress is not locally applied by partial support. Therefore, the form of the bulging portion 13A is preferable from the viewpoint of durability of the elastic seal ring.
- ridges 14 and 14 erected in the radial direction of the arc portion 10. These ridges 14, 14 are formed along the arc of the arc portion 10, and when the tube ends of the tubes 50, 50 to be connected are accommodated in the arc portion 10, the circumferential grooves 51, 51 of the respective tubes. Each is located within.
- the separation distance between the ridges 14 and 14 is arbitrarily selected in consideration of the separation distance between the circumferential groove 51 and the pipe end.
- this convex strip part 14 and 14 is an unnecessary structure, when setting it as the joint segment which connects the pipes which do not have a circumferential groove
- the elastic seal ring 2 accommodated in the concave groove 13 has an annular piece 2A extending to the inner peripheral side substantially at the center between its both end faces as shown in FIG.
- the annular piece 2A has a length that protrudes axially from the inner peripheral surface of the arc portion 10 in a state of being accommodated in the concave groove 13, and is positioned between the tube end surfaces of the tube 50 when the tube 50 is connected. Is done.
- the elastic seal ring 2 has a groove 2B between the annular piece 2A and the opening edges at both ends, and performs a so-called lip seal function.
- both ends of the groove 2B have tongue pieces 2C formed so that the fringes slightly return in the direction of the annular piece, and by the pressure of the fluid flowing through the groove 2B
- the tongue portion 2C is configured to be pressed against the outer surface of the pipe, and a more favorable sealing effect is achieved.
- the elastic seal ring 2 is held by the bulging portions 13 and 13 so that at least the axial center of the annular piece 2A and the axial center of the arc portion 10 are displaced in a non-parallel manner.
- an L-shaped ridge 15 arranged in an L shape from one end in the axial direction of the arc portion end and an L shape continuously formed from the L-shaped ridge 15 to the other end in the axial direction of the arc portion 10. It has a mold defect 16.
- the L-shaped chipped portion 16 is chipped in substantially the same shape as the L-shaped projecting ridge 15, and is formed in the L-shaped projecting ridge 15 formed in one joint segment 1 and the other joint segment.
- a seal stamp coupling is formed by fitting the L-shaped defect portion 16 together.
- the housing type pipe joint H of this preferable form of this form mentioned above is the said bolt 3 in the state which bridge
- the annular piece 2A protruding from the inner peripheral surface of the arc portion 10 is formed by the manner of holding the elastic seal ring 2 in the concave groove by the bulging portions 13 and 13 described above.
- the joint segments 1 and 1 are displaced from the pipe axis L2 as shown in FIG. It becomes a state.
- the housing type pipe joint H has the above-mentioned preferable configuration, and each joint as shown by an arrow in FIG. 9 as the curvature radius of the arc portion 10 is reduced by tightening the nut 4 to the bolt 3.
- the protrusion 14 is pressed against the distal end side wall 51A of the circumferential groove 51 of the tube and the rotation is completed. It is comprised so that it may become a position, ie, a fastening completion position.
- the pipes are reliably connected and fixed by the protruding strip portion 14 regardless of the presence or absence of an error in the diameter of the pipe or an error in the depth of the circumferential groove. If it is designed so that there is a gap between the ridge 14 and the proximal end side wall of the circumferential groove 51, the movement of the pipes to be separated is allowed while the movement of the pipes to be allowed is allowed. In this state, both pipe ends are connected while being sealed. Further, once the tubes are separated from each other, the tubes can be moved closer to each other thereafter. Furthermore, the tubes are connected to each other in a state where a certain amount of movement on the distal end side of the tubes is allowed.
- the pipe joint of the present invention can connect the pipes while ensuring the expansion and contraction flexibility of the pipe line.
- the housing type pipe joint H of the present invention has the above-mentioned preferable configuration, and each joint as shown by an arrow in FIG. 9 as the radius of curvature of the arc portion 10 is reduced by tightening the nut 4 to the bolt 3.
- the ridge 14 becomes the distal end side wall of the circumferential groove 51 of the tube. 51A and the proximal end side wall 51B may be pressed to reach a rotation completion position, that is, a fastening completion position.
- the pipes are reliably connected and fixed by the convex portion 14 regardless of whether there is an error in the diameter of the pipe or an error in the depth of the circumferential groove. Both pipe ends are connected while being sealed in a state where movement to be separated is restricted.
- the specific relationship between the rotation amount of the joint segment 1 and the position of the mark 10M is appropriately designed according to the pipe diameter of the pipe to be connected, the shape of the ridges 14, the rotation mechanism, and the like.
- the mark 10M coincides with the outer surface of the tube 50 to complete the fastening.
- this is not the case.
- the structure which has a guide function so that can be rotated can be illustrated.
- other known rotation mechanisms can be employed, and a plurality of rotation mechanisms can be used in combination.
- the housing type pipe joint H according to the present embodiment has a structure in which the pair of joint segments 1 and 1 are temporarily connected with bolts 3 and 3 and nuts 4 and 4 while holding the elastic seal ring 2 in the groove 13. It can be in a combined state.
- This temporarily connected state is a state in which the pair of joint segments 1 and 1 are connected to each other by the bolts 3 and 3 and the nuts 4 and 4 but the facing flange portions 20 and 20 are close to each other.
- the pipe ends of the pipes 50, 50 to be connected are attached to the annular piece 2A of the elastic seal ring 2 held by the joint segments 1, 1 that are temporarily joined.
- the housing-type pipe joint H is temporarily installed so that the pipe end face is brought into contact with the protruding strip 14 being positioned in the circumferential groove 51 formed in the pipe end.
- the fact that the tube end surface is in contact with the annular piece 2A can be easily detected with a sense other than vision, such as the feel and sound at that time.
- the nuts 4 and 4 are then tightened against the bolts 3 and 3 so that the flanges 20 and 20 of the joint segments 1 and 1 are brought close to each other.
- the arc central portion 10 s of the arc portions 10 and 10 or a portion including the vicinity thereof abuts the outer surface of the pipe 50, Thereafter, the arc segment 10 is bent from the arc segment central portion 10 s of the joint segment 1, 1 toward the flange portion 20 side so that the arc edge 10 ⁇ / b> E is close to the outer surface of the pipe 50.
- 10 has a smaller radius of curvature.
- the protruding portion 14 has the distal end side wall 51 ⁇ / b> A and the proximal end side wall 51 ⁇ / b> B of the circumferential groove 51.
- the fastening may be completed by pressing.
- the housing type pipe joint H of the present embodiment can be temporarily installed at an appropriate position between the pipe ends without disassembling the housing, and it is possible to reduce the fastening work and connect the pipes reliably.
- the end position of the fastening can be confirmed by matching the outer surface of the 10M pipe 50, and even if there is an error in the depth of the circumferential groove of the pipe to be connected, both pipes can be securely connected and fixed. It becomes possible.
- the present invention can be used in the field of connecting various fluid pipes such as water pipes, gas pipes and plant pipes while keeping them in a sealed state.
- notch base point 11b: Notch base point
- 13 recessed groove
- 13A bulged portion
- 13B non-bulged portion
- 14 convex strip portion
- 15 ... L-shaped convex portion 16 ... L-shaped defective portion
- 20 ... flange Part 21, bolt insertion hole, 50, pipe, 51, circumferential groove, 51 A, circumferential groove distal side wall, 51 B, circumferential groove proximal side wall, L 2, pipe axis, H, housing type pipe joint.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Joints With Sleeves (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
Description
また、トルクレンチによる締付けトルクの指定は、正確な締結を達成できるものの、トルクレンチを用意する必要等の煩雑な操作を要する。
<請求項1記載の発明>
対面する管同士を連結するハウジング形管継手であって、
一対の継手セグメントと弾性シールリングと前記一対の継手セグメント同士を締結する締結手段を具備し、
前記継手セグメントは、円弧部と円弧部両端から延出するフランジ部と円弧部内周面に形成され前記弾性シールリングが嵌め込まれる凹溝を有し、
前記締結手段により両継手セグメントのフランジ間を接近させることにより前記円弧部の曲率半径が小さくなるように撓み、その撓みによって円弧部の周端縁が連結すべき管外面に一致することにより管同士の連結が完了されるように構成されたハウジング形管継手において、
円弧部周端縁部に目印を有し、この目印に対応する円弧部周端縁の部位が管外面に接した際に管同士の連結が完了するように構成されていることを特徴とするハウジング形管継手。
従来のハウジング形管継手では、適当な締結具合、すなわち円弧部の撓み量が理解できないため、結果的に円弧部の撓みが最大限可能な円弧部の周端縁全長が管外面に一致するまで、対面するセグメントのフランジ間を接近させるづける必要があり、極めて煩雑かつ無駄な操作を要するものであったが、本発明のハウジング形管継手は、目印を有することから、連結に十分な周端縁の当接範囲が予め理解でき、必要以上の過度の円弧部の撓みが必要なくなり、適当な締結作業を行なうことができるようになる。もって締結作業の負担が軽減される。また、各端側に目印を位置させれば左右ズレを防止することが可能となる。
なお、この目印に対応するとは、目印自体が完全に管外面に接することだけではなく、例えば、目印が矢印等でありその矢印等が指し示す位置が、管外面に接することを含むことを意味するものである。
前記ハウジング形管継手は、管端部に周方向溝を有する管同士を連結固定するものであり、
前記継手セグメントは、円弧部の内周面に前記周方向溝内に位置される凸条部を有し、
かつ、前記締結手段による対面フランジ間の接近に伴って各継手セグメントがそれぞれ反対方向に回転され、
この回転により、前記目印に対応する円弧部周端縁の部位が管外面に接した際に、前記凸条部が周方向溝の遠位端側壁に押接される請求項1に記載のハウジング形管継手。
本発明のハウジング形管継手は、前記目印に対応する円弧部周端縁の部位が管外面に接した際、すなわち締結完了時に凸条部が管の周方向溝の遠位端側壁に押接されるので、例えば管径の誤差や周方向溝の深さの誤差の有無にかかわらず前記凸条部によって管同士が確実に連結固定される。
また、前記目印にしたがった締結完了位置において、前記凸条部と周方向溝の近位端側壁との間に間隙があるようにすれば、管同士が接近しようとする移動を規制しつつ、管が離間しようとする若干の移動が許容された状態で両管端がシールされつつ連結される。また、一旦、管同士が離間されたならば、その後は管同士が近づく移動も可能である。さらには管の遠位端側のある程度の移動が許容された状態に管同士を連結される。従って、本発明の管継手は、管路の伸縮可撓性を確保しつつ管同士を連結できる。
一対の継手セグメントと弾性シールリングと前記一対の継手セグメントのフランジ同士を締結する締結手段とを具備し、管端部に周方向溝を有する管同士を連結固定するハウジング形管継手であって、
前記締結手段は、各継手セグメントのフランジ間を接近させるものであり、
前記継手セグメントは、円弧部と円弧部両端から延出するフランジ部と、円弧部内周面に形成され前記弾性シールリングが嵌め込まれる凹溝と、前記円弧部の内周面で前記凹溝の両側それぞれに円弧部の半径方向に向かって起立する凸条部と、前記円弧部周端縁部に設けられた目印とを有し、
対面する各管の周方向溝内に凸条部を位置させた状態から、前記締結手段により各継手セグメントのフランジ間を接近させた際に、各継手セグメントの円弧部の曲率半径が小さくなり前記円弧部の周端縁が連結すべき管外面に一致する方向に撓むとともに、前記円弧部の軸心が管軸と平行となる方向にかつ各継手セグメントがそれぞれ反対方向に回転し、
前記目印に対応する円弧部周端縁の部位が管外面に接するまで円弧部が撓んだときに、前記凸条部が周方向溝の遠位端側壁及び近位端側壁に押接し、前記管同士の連結が完了されるように構成されている、ことを特徴とするハウジング形管継手。
請求項1記載の発明と同様の効果を奏する。さらに、本発明のハウジング形管継手においては、前記目印に対応する円弧部周端縁の部位が管外面に接した際に、前記凸条部が周方向溝の遠位端側壁及び近位端側壁に押接されるので、ハウジング形管継手の締結後には、連結すべき管が近づく方向或いは遠ざかる方向に移動することが規制された状態で確実に固定される。
前記目印は、前記円弧部周端縁部の両円弧端部に設けられている請求項1~3の何れか1項に記載のハウジング形管継手。
前記目印は、円弧部の円弧中心から円弧部の中央に向かう垂線に対して15~60度の位置にある請求項1~3の何れか1項に記載のハウジング形管継手。
目印の位置が円弧部の中央に向かう垂線に対して15~60度の位置にある場合、円弧部周端縁は管外面に対して、その周端縁の円弧部の円弧中心から円弧部の中央に向かう垂線に対して30~120度の範囲で接することができる。そして、この範囲が接すれば連結固定に十分であり、また、締結作業負担の軽減も十分なものとなる。
継手セグメントは、円弧部周端縁部が両フランジ部側端を基点として、円弧中心方向に向かって所定範囲切り欠かれており、その切り欠き部の円弧中心方向端である終端が前記目印とされている請求項1~3の何れか1項に記載のハウジング形管継手。
円弧部周端縁部が両フランジ部側端を基点として所定範囲切り欠かれ、その切り欠き部の終端が前記目印とされている場合、フランジ間を接近させるための力が低減され、また、接する円弧部周端縁の量及び位置が目視にて確認しやすいものとなり締結作業の負担軽減が確実なものとなる。また、切り欠き部による目印は、塗装等による目印と比較して、塗装剥離等のおそれがなく耐久性の観点からも望ましい。
前記弾性シールリングは内周側に延出する、連結すべき管の管端面間に位置される環状片を有し、かつ、その環状片の軸心が継手セグメントの軸心に対して非平行な状態で凹溝に予め嵌め込まれている請求項1~3の何れか1項に記載のハウジング形管継手。
本発明のハウジング形管継手は、ハウジング内に保持される弾性シールリングが環状片を有する。この環状片は弾性シールリングの内周側に延出されているため、環状片の両サイド(弾性シールリングの両端縁側)から管端面を当接させることができ、目視の確認がなくともハウジング形管継手を所望の位置に弾性シールリングを確実に位置せしめることができる。
また、かかる弾性シールリングが継手セグメントの凹溝内に予め支持された状態であるから、環状片の両サイド(弾性シールリングの両端縁側)に管端面を当接させると、継手セグメントが管端部間に位置せしめられるので、極めて簡易に締め付け準備を完了することができる。
さらに、本発明のハウジング形管継手は、環状片の軸心が継手セグメントの軸心に対して非平行な状態、つまり前記環状片の軸心が継手セグメントの軸心に対して傾斜されて保持されているから、環状片の両サイドに管端面を当接させただけで継手セグメントが所定の回転前の状態となり設置準備が完了する。
ここで、本発明のハウジング形管継手では、弾性シールリングが凹溝内に支持されており、継手セグメントを回転させる場合、その回転にともなって弾性シールリングが凹溝壁により押圧されることになるが、弾性シールリングの変形性により、継手セグメントの回転が規制されることはないし、継手セグメントの回転による弾性シールリングのねじれも生じない。
さらに、弾性シールリングが、環状片と両端開口縁との間に溝部を有し、当該溝部へ流通される流体の圧によって前記溝幅が拡張されるリップシール機構を有するものとすれば、弾性シールリングが管に対して常に加圧をもって接触されていなくとも、必要時に環状片と両端開口縁との間に溝部の幅が拡張されてシール機能が発揮されるため、弾性シールリングの経時的な劣化が小さく耐久性の高いハウジング形管継手となる。
円弧部の外周側弧端部に、円弧部の軸方向一方端側からL字型に延在しかつ対面する継手セグメントに向かって凸となるL字型凸堤と、このL字型凸堤に連続して円弧部の軸方向他方端に前記L字型に欠損されたL字型欠損部と、前記L字型凸堤部とL字型欠損部との間に形成される段差部を有し、
前記締結手段によって、対面フランジ間が接近されかつセグメント継手が前記回転される際に、一方の継手セグメントのL字型凸堤と他方の継手セグメントのL字型欠損部とが嵌合するように移動し、
前記目印が管外面に実質的に接した際に完全に嵌まり合って、互いの移動を規制する印籠結合を形成する、請求項1~3の何れか1項に記載のハウジング形管継手。
本発明のハウジング形管継手は、L字型凸堤とこのL字型凸堤に連続して形成されたL字型欠損部とが完全に嵌まり合い、互いの移動を規制する印籠結合を形成するので、継手セグメントが過回転することがなく、ハウジング形管継手が所望の位置で確実にセットできるほか、過回転にともなう弾性シールリングのねじれ、凸条部の破損、管の破損が防止される。
さらに、本発明のハウジング形管継手は、管同士が接近しようとする移動を規制しつつ、管が離間しようとする若干の移動が許容された状態で両管端をシールしつつ連結できる。管同士を遊びをもって連結できるため、管路の伸縮可撓性を確保でき、例えば、外力を受ける機会が多々ある地中埋設管同士の連結に適する。
また、凸条部が周方向溝の遠位端側壁及び近位端側壁の押圧による固定により両管を確実に連結固定することが可能な、ハウジング形管継手も提供される。
<構造>
本形態のハウジング形管継手Hは、一対の継手セグメント1,1と、環状の弾性シールリング2と、継手セグメント1,1同士を締結する締結手段であるボルト3及びナット4とを具備する。ここで、一対の各継手セグメント1,1の形状は同様である。従って、形状の説明にあたっては一方の継手セグメント1を例にする。
まず、前記円弧部10は、その内周面には、特に図6、7に示されるように、弾性シールリング2を収容するための凹溝13が一方円弧端から他方円弧端に向かって延在するように形成されており、その凹溝13の幅は弾性シールリング2の幅とほぼ同等かそれより若干広く、また弾性シールリング2が嵌まる深さに形成されている。
これにより、上述のとおり、例えば管径の誤差や周方向溝の深さの誤差の有無にかかわらず前記凸条部14によって管同士が確実に連結固定され、また、当該締結完了位置において、前記凸条部14と周方向溝51の近位端側壁との間に間隙があるように設計すれば管同士が接近しようとする移動を規制しつつ、管が離間しようとする若干の移動が許容された状態で両管端がシールされつつ連結される。また、一旦、管同士が離間されたならば、その後は管同士が近づく移動も可能である。さらには管の遠位端側のある程度の移動が許容された状態に管同士を連結される。従って、本発明の管継手は、管路の伸縮可撓性を確保しつつ管同士を連結できる。
また、本発明のハウジング形管継手Hは、上記好ましい構成のもと、前述前記ボルト3に対するナット4の締め付けによる円弧部10の曲率半径の小径化とともに、図9の矢印で示すように各継手セグメント1,1が反対方向に回転され、前記目印10Mが管外面に実質的に接した際に、図10に示すように、前記凸条部14が管の周方向溝51の遠位端側壁51A及び近位端側壁51Bに押接され回転完了位置、すなわち締結完了位置となるようにしてもよい。
次いで、本形態のハウジング形管継手Hの使用方法を説明する。
上記本形態のハウジング形管継手Hは、その構造からして、凹溝13内に弾性シールリング2を保持しつつ一対の継手セグメント1,1同士をボルト3,3及びナット4,4で仮結合した状態とすることができる。この仮結合状態は、ボルト3,3及びナット4,4により一対の継手セグメント1,1同士が連結されているものの対面するフランジ部20,20間が遠近可能な状態である。
なお、継手セグメント1,1に形成した前記目印10Mに対応する部位が管50の外面に接し、対面するL字型凸堤15とL字型欠損部16とが完全に嵌合されて印籠結合を形成し、対面する継手セグメント1,1同士の回転が規制されるとともに、図10に示されるように、前記凸条部14が周方向溝51の遠位端側壁51A及び近位端側壁51Bに押接され締結が完了されてもよい。
Claims (8)
- 対面する管同士を連結するハウジング形管継手であって、
一対の継手セグメントと弾性シールリングと前記一対の継手セグメント同士を締結する締結手段を具備し、
前記継手セグメントは、円弧部と円弧部両端から延出するフランジ部と円弧部内周面に形成され前記弾性シールリングが嵌め込まれる凹溝を有し、
前記締結手段により両継手セグメントのフランジ間を接近させることにより前記円弧部の曲率半径が小さくなるように撓み、その撓みによって円弧部の周端縁が連結すべき管外面に一致することにより管同士の連結が完了されるように構成されたハウジング形管継手において、
円弧部周端縁部に目印を有し、この目印に対応する円弧部周端縁の部位が管外面に接した際に管同士の連結が完了するように構成されていることを特徴とするハウジング形管継手。 - 前記ハウジング形管継手は、管端部に周方向溝を有する管同士を連結固定するものであり、
前記継手セグメントは、円弧部の内周面に前記周方向溝内に位置される凸条部を有し、
かつ、前記締結手段による対面フランジ間の接近に伴って各継手セグメントがそれぞれ反対方向に回転され、
この回転により、前記目印に対応する円弧部周端縁の部位が管外面に接した際に、前記凸条部が周方向溝の遠位端側壁に押接される請求項1に記載のハウジング形管継手。 - 一対の継手セグメントと弾性シールリングと前記一対の継手セグメントのフランジ同士を締結する締結手段とを具備し、管端部に周方向溝を有する管同士を連結固定するハウジング形管継手であって、
前記締結手段は、各継手セグメントのフランジ間を接近させるものであり、
前記継手セグメントは、円弧部と円弧部両端から延出するフランジ部と、円弧部内周面に形成され前記弾性シールリングが嵌め込まれる凹溝と、前記円弧部の内周面で前記凹溝の両側それぞれに円弧部の半径方向に向かって起立する凸条部と、前記円弧部周端縁部に設けられた目印とを有し、
対面する各管の周方向溝内に凸条部を位置させた状態から、前記締結手段により各継手セグメントのフランジ間を接近させた際に、各継手セグメントの円弧部の曲率半径が小さくなり前記円弧部の周端縁が連結すべき管外面に一致する方向に撓むとともに、前記円弧部の軸心が管軸と平行となる方向にかつ各継手セグメントがそれぞれ反対方向に回転し、
前記目印に対応する円弧部周端縁の部位が管外面に接するまで円弧部が撓んだときに、前記凸条部が周方向溝の遠位端側壁及び近位端側壁に押接し、前記管同士の連結が完了されるように構成されている、ことを特徴とするハウジング形管継手。 - 前記目印は、前記円弧部周端縁部の両円弧端部に設けられている請求項1~3の何れか1項に記載のハウジング形管継手。
- 前記目印は、円弧部の円弧中心から円弧部の中央に向かう垂線に対して15~60度の位置にある請求項1~3の何れか1項に記載のハウジング形管継手。
- 継手セグメントは、円弧部周端縁部が両フランジ部側端を基点として、円弧中心方向に向かって所定範囲切り欠かれており、その切り欠き部の円弧中心方向端である終端が前記目印とされている請求項1~3の何れか1項に記載のハウジング形管継手。
- 前記弾性シールリングは内周側に延出する、連結すべき管の管端面間に位置される環状片を有し、かつ、その環状片の軸心が継手セグメントの軸心に対して非平行な状態で凹溝に予め嵌め込まれている請求項1~3の何れか1項に記載のハウジング形管継手。
- 円弧部の外周側弧端部に、円弧部の軸方向一方端側からL字型に延在しかつ対面する継手セグメントに向かって凸となるL字型凸堤と、このL字型凸堤に連続して円弧部の軸方向他方端に前記L字型に欠損されたL字型欠損部と、前記L字型凸堤部とL字型欠損部との間に形成される段差部を有し、
前記締結手段によって、対面フランジ間が接近されかつセグメント継手が前記回転される際に、一方の継手セグメントのL字型凸堤と他方の継手セグメントのL字型欠損部とが嵌合するように移動し、
前記目印が管外面に実質的に接した際に完全に嵌まり合って、互いの移動を規制する印籠結合を形成する、請求項1~3の何れか1項に記載のハウジング形管継手。
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Also Published As
Publication number | Publication date |
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US9285061B2 (en) | 2016-03-15 |
CN102597591A (zh) | 2012-07-18 |
KR101788341B1 (ko) | 2017-11-15 |
CN102597591B (zh) | 2014-12-17 |
TW201139907A (en) | 2011-11-16 |
HK1169477A1 (en) | 2013-01-25 |
KR20120099237A (ko) | 2012-09-07 |
US20120256416A1 (en) | 2012-10-11 |
TWI516704B (zh) | 2016-01-11 |
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