JP2022092700A - Pipe connecting device - Google Patents

Abstract

To provide a pipe connecting device which can prevent breakage of a bolt for fastening a socket side jig to a spigot side jig to achieve a high separation prevention function against external force acting in multiple directions.SOLUTION: A pipe connecting device 11 includes: a socket side jig 4 attached to an outer peripheral surface 2b of a socket part 2a of one pipeline formation member 2; a spigot side jig 3 attached to an outer peripheral surface 1b of a spigot part 1a of the other pipeline formation member 1 which is inserted into the socket part 2a in a sealing manner; bolts 61 and nuts 62, 63, which connect the socket side jig 4 with the spigot side jig 3 in an axial direction, and prevents separation of the pipeline formation members 1, 2. The spigot side jig 3 has: tilting inhibition parts 7 each of which inhibits tilting to the spigot part 1a; insertion holes 33 each having a shape that allows relative movement of the bolt 61 and the nut 63; and expansion parts 32 each of which includes the insertion hole 33 and allows the relative movement of the bolt 61 and the nut 63. The socket side jig 4 has inner periphery parts 42a, 42b, and 42e attached to the socket part 2a in a tiltable manner.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pipe connecting device for preventing disconnection between pipeline constituent members.

For example, an existing pipeline such as a water pipe is configured by connecting a plurality of pipeline constituent members. As a method of connecting the pipeline constituent members, the insertion portion of the other pipeline constituent member is inserted into the socket portion of one pipeline constituent member via a ring-shaped seal member, and the connection is connected in a sealed manner. A pipe connecting device for preventing disconnection between the pipeline constituent members is adopted at the location.

As such a pipe coupling device, there is one as shown in Patent Document 1. The pipe coupling device of Patent Document 1 includes an annular receiving side jig attached to the outer peripheral surface of the receiving portion, an annular insertion side jig attached to the outer peripheral surface of the insertion portion, and a receiving side jig. And a plurality of bolts and nuts for connecting the jig on the insertion port side in the axial direction. The receiving port side jig is arranged so as to surround the outer diameter side of the receiving port lock ring that is externally fitted to the outer peripheral surface of the receiving port portion, and the set bolt screwed to the receiving port side jig is tightened in the inner diameter direction. The receiving port lock ring is pressed against the outer peripheral surface of the receiving portion, and the receiving side jig is firmly attached to the receiving portion by the reaction force. Further, the insertion side jig is arranged so as to surround the outer diameter side of the insertion lock ring that is externally fitted to the outer peripheral surface of the insertion portion, and the set bolt screwed to the insertion side jig is inserted in the inner diameter direction. By tightening, the insertion lock ring is pressed against the outer peripheral surface of the insertion portion, and the jig on the insertion side is firmly attached to the insertion portion by the reaction force.

A plurality of insertion holes for inserting bolts are formed in the receiving side jig and the insertion side jig in the circumferential direction, and the bolt is inserted into each insertion hole, and the receiving side is cured by the bolt head and the nut. By tightening the tool and the insertion side jig in the axial direction, the pipeline constituent members are connected to each other so as not to be detached.

Japanese Unexamined Patent Publication No. 2008-25715 (Page 7, Fig. 1)

In a pipe connecting device as in Patent Document 1, since the receiving side jig and the insertion side jig are tightened in a direction approaching the axial direction by bolts and nuts, the fluid pressure when using the pipe line is used. This makes it possible to prevent the insertion portion from coming off from the receiving portion. By the way, in such a pipe connecting device, only a force acting in a direction of disconnecting from the connection portion between the insertion portion and the receiving portion due to various external forces such as fluid pressure, earth pressure, load of a vehicle, earthquake, etc. Instead, a force may act in the direction of bending. However, in a pipe connecting device as in Patent Document 1, the receiving side jig and the insertion side jig are firmly attached to the receiving portion and the insertion portion by set bolts, respectively. When a force is applied in the direction of bending the connection point between the insertion part and the reception part, the reception side jig that follows the behavior of the reception part and the insertion side jig that follows the behavior of the insertion part. The jig and the jig move relative to each other, and as a result, the bolt may be damaged by receiving a large shearing force.

The present invention has been made by paying attention to such a problem, and prevents damage to the bolt that fastens the receiving side jig and the insertion side jig to prevent an external force acting in multiple directions. It is an object of the present invention to provide a pipe connecting device capable of exhibiting a high detachment prevention function.

In order to solve the above problems, the pipe coupling device of the present invention is used.
It is attached to the receiving side jig attached to the outer peripheral surface of the receiving portion of one pipeline constituent member and the outer peripheral surface of the insertion portion of the other conduit constituent member to be hermetically inserted into the receiving portion. A pipe connection provided with an insertion side jig, a plurality of bolts and nuts for axially connecting the receiving side jig and the insertion side jig, and preventing the pipeline constituent members from being separated from each other. It ’s a device,
The insertion side jig is provided with a tilt suppression portion that suppresses tilting with respect to the insertion portion, an insertion hole having a shape that allows relative movement of the bolt and nut, and the insertion hole of the bolt and nut. It has a bulge that allows relative movement and
The receiving side jig is characterized by having an inner peripheral portion that is tiltably attached to the receiving portion.
According to this feature, when a force in the bending direction acts on the connecting portion of the receiving portion and the insertion portion due to an external force, the tilt is suppressed with respect to the insertion portion, and the insertion portion moves following the insertion portion. The bolt that connects the mouth side jig and the mouthpiece side jig that tilts with respect to the mouthpiece moves relative to each other in the insertion hole of the mouthpiece side jig, and the nut that cooperates with this bolt Since it can move relative to the bulging portion provided with the insertion hole of the jig on the insertion port side, the shearing force applied to the bolt can be flexibly released, the load applied to the bolt can be reduced, and the bolt can be prevented from being damaged. Therefore, it is possible to exert a high detachment prevention function even against an external force acting in multiple directions.

The inner peripheral portion of the receiving side jig is characterized by having a convex portion that abuts on a portion of the receiving portion that bulges toward the outer diameter side.
According to this feature, the convex portion of the receiving side jig is brought into contact with the portion of the receiving portion that bulges toward the outer diameter side, so that the contact area between the receiving side jig and the receiving portion is increased. Since it can be made smaller, it is easy to tilt the jig on the receiving side with respect to the receiving part.

The convex portion is characterized in that it has a curved surface shape.
According to this feature, the receiving side jig can be smoothly tilted with respect to the receiving portion.

The inner peripheral portion of the receiving end side jig is provided at a position axially separated from the convex portion, and has a tilting regulating portion that abuts on the outer peripheral surface of the receiving portion and regulates tilting. It is characterized by being.
According to this feature, the tilt restricting portion regulates excessive tilting of the receiving side jig with respect to the receiving portion.

The tilt control portion is characterized in that it has a curved surface shape.
According to this feature, it is possible to prevent the tilting restricting portion from biting into the outer peripheral surface of the receiving portion and damaging the outer peripheral surface of the receiving portion.

The receiving side jig is characterized in that it has an annular shape.
According to this feature, the receiving side jig can be tilted by any bending force in any direction.

The receiving side jig is characterized in that it is formed into an annular shape by a plurality of divided bodies.
According to this feature, the annular receiving side jig can be easily attached to the outer peripheral surface having the bulging portion of the receiving portion.

The insertion hole is characterized by being an elongated hole extending in the radial direction.
According to this feature, the bolt can be guided radially along the elongated hole. In addition, it can be used for various receiving portions and insertion portions having different radial dimensions.

The portion on the outer diameter side of the elongated hole is characterized in that it is formed wider in the circumferential direction than the portion on the inner diameter side of the elongated hole.
According to this feature, since the width of the elongated hole in the circumferential direction is larger than the diameter of the bolt, in addition to the bending between the receiving portion and the insertion portion, the relative movement in the circumferential direction between the receiving portion and the insertion portion, That is, it can follow the twist. Further, since the portion on the outer diameter side of the long hole is formed wider in the circumferential direction than the portion on the inner diameter side of the long hole, it is formed in the circumferential direction of the bolt according to the turning radius of the bolt inserted into the long hole. You can secure the transfer fee.

It is a partial cross-sectional view which shows the state which the insertion tube and the receiving tube are connected by the tube connecting device in Example 1 of this invention. It is a figure which looked at the insertion side jig in Example 1 of this invention from the rear end side in the axial direction. It is a figure which looked at the receiving side jig in Example 1 of this invention from the tip side in the axial direction. (A) is a view of the divided body of the receiving side jig from the inner diameter side, (b) is a view of the divided body from the rear end side in the axial direction, and (c) is a direction in which the connecting portion is orthogonal to the axial direction. (D) is a view of (c) viewed from the outer diameter side, (e) is a view of the ribs viewed from the outer diameter side, (f) is a sectional view taken along the line AA of (b), (g). ) Is also a sectional view taken along the line BB. It is an axial sectional view which shows a part of a pipe coupling device. It is a partial cross-sectional view which shows an example which applied the pipe coupling device to the receiving pipe of a straight pipe. (A) is a cross-sectional view taken along the line CC of FIG. 2 showing a state in which a force in the bending direction is not applied to the connecting portion of the receiving portion and the insertion portion, and (b) is also a sectional view taken along the line DD. (A) is a cross-sectional view taken along the line CC of FIG. 2 showing a state in which a force in the bending direction is applied to the connecting portion of the receiving portion and the insertion portion from the state of FIG. 7, and (b) is also a cross-sectional view taken along the line DD. be. It is sectional drawing which shows the relative movement of the insertion side jig and the receiving side jig with respect to the insertion tube and the receiving tube. (A) is a cross-sectional view taken along the line CC of FIG. 2 showing a state in which a force in the bending direction is applied to the connecting portion of the receiving portion and the opening portion from the state of FIG. be. It is a partial cross-sectional view which shows the state which the insertion tube and the receiving tube are connected by the tube connecting device in Example 2 of this invention. It is a figure which looked at the insertion side jig in Example 2 of this invention from the rear end side in the axial direction. It is a figure which looked at the receiving side jig in Example 2 of this invention from the tip side in the axial direction. (A) is a view of the receiving side jig from the rear end side in the axial direction, (b) is a sectional view taken along the line EE of (a), (c) is a sectional view taken along the line FF, and (d) is the same. It is a cross-sectional view of GG. It is a partial cross-sectional view which shows the state which the insertion tube and the receiving tube are connected by the tube connecting device in Example 3 of this invention. It is a figure which looked at the insertion side jig in Example 3 of this invention from the rear end side in the axial direction. It is a figure which shows the modification 1 of this invention. It is a figure which shows the modification 2 of this invention. It is a figure which shows the modification 3 of this invention.

A mode for carrying out the pipe coupling device according to the present invention will be described below based on examples.

The pipe coupling device according to the first embodiment will be described with reference to FIGS. 1 to 10. The right side of FIG. 1 (the tip end side of the insertion tube) will be referred to as the tip end side, and the left side of FIG. 1 will be referred to as the rear end side.

As shown in FIG. 1, the insertion pipe 1 and the reception pipe 2 constituting the pipeline constituent member of the present embodiment are, for example, irregular pipes made of ductile cast iron for water supply buried in the ground. The inner peripheral surface is covered with a mortar layer. The insertion tube 1 and the reception tube 2 according to the present invention may be made of other metals such as cast iron or steel, or may be made of concrete, vinyl chloride, polyethylene, polyolefin, etc. It may be a tube. Furthermore, the inner peripheral surfaces of the insertion tube 1 and the reception tube 2 are 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 with powder to the insertion tube 1 and the reception tube. The inner peripheral surface of the tube 2 may be covered. Further, the fluid in the inlet pipe 1 and the inlet pipe 2 is not limited to the clean water of this embodiment, for example, industrial water, agricultural water, sewage, etc., as well as gas or a gas-liquid mixture of gas and liquid. It doesn't matter.

As shown in FIG. 1, the insertion tube 1 is formed with an insertion portion 1a having a straight tubular outer peripheral surface extending at the end portion on the distal end side, and the receiving tube 2 is formed at the end portion on the rear end side. The receiving portion 2a is formed, and the insertion portion 1a is inserted into the receiving portion 2a.

A ring-shaped sealing member 5 is radially sandwiched between the insertion portion 1a and the receiving portion 2a, and is arranged between the insertion portion 1a and the receiving portion 2a by the sealing member 5. Is sealed. The seal member 5 is housed in a recess 2d formed on the inner peripheral surface separated from the end surface 2c of the receiving portion 2a in the pipe axis direction.

The insertion tube 1 and the reception tube 2 in which the insertion portion 1a is inserted into the receiving portion 2a are connected in a state where the pipe connecting device 11 prevents the insertion portion 1a from being detached in the axial direction.

The pipe coupling device 11 includes an insertion side jig 3 externally fitted to the outer peripheral surface 1b of the insertion portion 1a, a reception side jig 4 externally fitted to the outer peripheral surface 2b of the receiving portion 2a, and an insertion port. It is mainly composed of a coupler 6 for connecting the side jig 3 and the receiving side jig 4.

As shown in FIG. 2, the insertion side jig 3 includes a base portion 31 having a substantially annular structure when viewed from the pipe axis direction, and a plurality of bulging portions 32 bulging toward the outer diameter side of the base portion 31. It is equipped with. Eight bulging portions 32 are provided in the present embodiment at equal intervals in the circumferential direction. The insertion side jig 3 is made of ductile cast iron in this embodiment, but is not limited to this, and may be made of, for example, other metal such as steel or synthetic resin. Further, the base portion 31 is not limited to the integrated structure but may have a divided structure.

A long hole 33 as an insertion hole is formed in each of the bulging portions 32 so as to extend in the radial direction, and the bolt shaft 61 of the connector 6 is inserted into the long hole 33. .. The quantities of the bulging portion 32 and the elongated hole 33 may be freely changed. Furthermore, in FIG. 2, for convenience of explanation, the insertion tube 1, the receiving tube 2, and the receiving side jig 4 are not shown.

As shown in FIGS. 1 and 2, on the inner diameter side of the base portion 31, a plurality of accommodating recesses 34 that open toward the outer peripheral surface of the insertion portion 1a are evenly spaced in the circumferential direction in the present embodiment. There are four.

Each accommodating recess 34 accommodates a locking member 7 as an arc-shaped tilt suppressing portion in the circumferential direction. The locking member 7 has a claw portion 71 formed on the inner peripheral surface thereof. The quantities of the accommodating recess 34 and the locking member 7 may be freely changed. Further, the claw portion 71 is not limited to one formed on each locking member, and a plurality of claw portions 71 may be formed.

Further, in the outer diameter portion of the base portion 31, a plurality of screw holes 35 penetrating in the radial direction are equally spaced in the circumferential direction between the adjacent bulging portions 32, and eight are formed in this embodiment. Each screw hole 35 is arranged near both ends in the circumferential direction of each accommodating recess 34.

A push bolt 8 is screwed into each of the screw holes 35, and the locking member 7 is inserted into the insertion portion 1a by screwing the push bolt 8 in the inner diameter direction of the insertion side jig 3 and advancing the push bolt 8. The claw portion 71 is pressed toward and bites into the outer peripheral surface 1b of the insertion portion 1a, so that the insertion side jig 3 and the insertion portion 1a are integrally fixed. The numbers of the screw holes 35 and the push bolts 8 may be freely changed, and the traveling direction of the push bolts 8 is not limited to the radial direction orthogonal to the pipe axis direction, but is inclined with respect to the pipe axis direction. It may be installed in.

As shown in FIG. 3, in this embodiment, the receiving side jig 4 is configured in an annular shape by connecting two arc-shaped divided bodies 41 and 41 with a T-head bolt 44 and a nut 45. The receiving side jig 4 is made of ductile cast iron in this embodiment, but is not limited to this, and may be made of, for example, other metal such as steel or synthetic resin. Furthermore, the number of divisions of the receiving side jig 4 may be freely changed.

In this receiving-side jig 4, a plurality of insertion holes 43 are equidistantly spaced in the circumferential direction at positions corresponding to the elongated holes 33 of the insertion-side jig 3 in the circumferential direction, and eight are formed in this embodiment. The bolt shaft 61 of the connecting tool 6 is inserted into the insertion hole 43. The insertion hole 43 is formed to have a slightly larger diameter than the bolt shaft 61. The quantity of the insertion holes 43 may be freely changed according to the quantity of the elongated holes 33. Furthermore, in FIG. 3, for convenience of explanation, the insertion tube 1, the receiving tube 2, and the insertion side jig 3 are not shown.

As shown in FIGS. 1 and 4, the divided body 41 is mainly composed of a base portion 42A having an arc shape in an axial direction and connecting portions 42B provided at both ends in the circumferential direction of the base portion 42A.

The base portion 42A has a convex portion 42a protruding toward the inner diameter side and a convex portion so as to form an annular contact with the outer peripheral surface 2b of the receiving portion 2a that bulges toward the outer diameter side of the straight pipe portion of the receiving pipe 2. A cylindrical extending portion 42b extending from the position on the outer diameter side of the portion 42a to the rear end side in the axial direction (that is, the insertion tube 1 side) and an upright portion 42c rising in the outer diameter direction from the rear end of the extending portion 42b. In the upright portion 42c, four insertion holes 43 are formed so as to be separated from each other in the circumferential direction. Further, the convex portion 42a has a curved surface shape in an axial cross-sectional view.

Further, the extending portion 42b extends from the convex portion 42a in the outer diameter direction while being gently curved toward the rear end side in the axial direction. That is, the extending portion 42b is a concave portion that opens on the inner diameter side between the rear end portion 42e and the convex portion 42a. Further, the rear end portion 42e has a curved surface shape in an axial cross-sectional view (see FIG. 5). The convex portion 42a, the extending portion 42b, and the rear end portion 42e form an inner peripheral portion of the receiving side jig 4.

Further, since the rib 42d connecting the extending portion 42b and the standing portion 42c is provided on the outer peripheral surface of the base portion 42A, the divided body 41 has high rigidity.

Each connecting portion 42B is formed so as to project from the circumferential end portion of the extending portion 42b and the erecting portion 42c toward the outer diameter side, and two through holes 46 penetrating in the direction orthogonal to the pipe axis direction are formed. ing. The divided bodies 41 are connected to each other by superimposing the connecting portions 42B of the divided bodies 41, inserting the T-head bolts 44 into the corresponding through holes 46, and fastening the nuts 45.

As shown in FIGS. 1 and 5, the connector 6 includes a bolt shaft 61 as a bolt having a male screw formed on the outer peripheral surface, a nut 62 screwed from the tip side of the bolt shaft 61, and a bolt shaft. It is composed of a nut 63 screwed from the rear end side of 61.

The insertion side jig 3 and the receiving side jig 4 have a bolt shaft 61 inserted through a long hole 33 of the insertion side jig 3 and an insertion hole 43 of the receiving side jig 4, and the bolt shaft 61 is inserted. By screwing the nuts 62 and 63 into the bolt, the nuts 62 and 63 are tightened and connected in a direction approaching the pipe axis direction. That is, the relative movement of the insertion side jig 3 and the receiving side jig 4 in the direction away from each other in the pipe axis direction is restricted by the connecting tool 6.

Next, the assembly procedure of the pipe coupling device 11 will be described with reference to FIG. Here, a mode in which the insertion port 1 and the reception tube 2 are newly installed will be described.

First, the insertion side jig 3 is inserted through the insertion tube 1, and the insertion side jig 3 is deposited in the insertion tube 1. Next, the insertion portion 1a of the insertion tube 1 is fitted into the receiving portion 2a of the receiving tube 2 via the seal member 5.

Next, the connecting portions 42B and 42B of the divided bodies 41 and 41 are connected to each other by the T-head bolt 44 and the nut 45, and the receiving side jig 4 is assembled to the outer peripheral surface 2b of the receiving portion 2a.

As shown in FIG. 5, in a state where the receiving side jig 4 is assembled to the outer peripheral surface 2b of the receiving portion 2a (that is, in a normal state where no external force acts on the receiving side jig 4). The inner peripheral surface of the extending portion 42b is arranged so as to be separated from the outer peripheral surface 2b of the receiving portion 2a on the outer diameter side, and only the convex portion 42a comes into contact with the outer peripheral surface 2b of the receiving portion 2a.

Specifically, since the convex portion 42a has a curved surface shape in an axial cross-sectional view, the convex portion 42a is in linear contact with the outer peripheral surface 2b of the receiving portion 2a in the circumferential direction.

In this embodiment, the embodiment in which the receiving side jig 4 is attached to the receiving pipe 2 which is a deformed pipe is illustrated, but as shown in FIG. 6, for example, the outer shape is different from that of the receiving pipe 2. The receiving side jig 4 can also be attached to the receiving pipe 20 which is a straight pipe.

As described above, since the extended portion 42b of the receiving side jig 4 is a concave portion that opens to the inner diameter side, the shape of various deformed pipes and straight pipes is different, and rust humps generated on the pipe surface. , It is possible to deal with the dimensional difference of individual pipes, which is allowed as a tolerance.

Next, the insertion side jig 3 and the receiving side jig 4 are connected to the long hole 33, the bolt shaft 61 inserted into the insertion hole 43, and the nuts 62 and 63 screwed at both ends thereof in the pipe axis direction. Tighten in the direction closer to and connect. By this connection, the tip portion 36 protruding in the pipe axis direction of the insertion side jig 3 comes into contact with the end surface 2c of the receiving portion 2a, and the convex portion 42a of the receiving side jig 4 expands the receiving portion 2a. The outer peripheral surface 2b is linearly contacted and locked over the entire circumference. In this embodiment, the bolt shaft 61 is arranged closer to the outer diameter side of the long hole 33 of the insertion side jig 3, but is located between the long hole 33 and the outer diameter side of the bolt shaft 61. A gap is formed (see FIGS. 2 and 5).

Next, each push bolt 8 of the insertion side jig 3 is tightened, the claw portion 71 of the locking member 7 is made to bite into the outer peripheral surface 1b of the insertion portion 1a, and the insertion side jig 3 and the insertion portion 1a are inserted. And are firmly fixed, thereby completing the assembly of the pipe connecting device 11.

After the insertion pipe 1 and the reception pipe 2 inseparably connected by the pipe connection device 11 are buried in the ground, a fluid such as clean water is flowed inside the insertion pipe 1 and the reception pipe 2. (That is, it is in use). At this time, at the connection point between the insertion pipe 1 and the reception pipe 2, various fluid pressure, soil pressure, wheel load by a car or truck, an earthquake, etc. flowing inside the insertion pipe 1 and the reception pipe 2 are present. When an external force is applied, a force in multiple directions such as a disconnection direction and a bending direction may act on the connection point between the insertion tube 1 and the receiving tube 2. Of these, when a force in the detaching direction is applied, the insertion side jig 3 fixed to the insertion portion 1a and the reception side jig 4 locked to the outer peripheral surface of the reception portion 2a are connected. Since it is connected by the tool 6, it is possible to prevent the insertion tube 1 and the receiving tube 2 from being separated from each other.

Next, the mode when a force in the bending direction acts on the connection point between the insertion tube 1 and the receiving tube 2 will be described with reference to FIGS. 7 to 9. For convenience of explanation, in FIGS. 8 and 9, the receiving tube 2 does not move in the drawing, and the tip of the insertion portion 1a of the insertion tube 1 bends downward with respect to the receiving tube 2. The morphology is illustrated. However, in the actual pipeline, both the insertion tube 1 and the reception tube 2 will be described as bending. Furthermore, in FIG. 9, the state of each member before the force in the bending direction is applied to the connection point between the insertion tube 1 and the reception tube 2 is illustrated by a two-dot chain line, and the insertion tube 1 and the reception tube 2 are shown. The state of each member after the force in the bending direction is applied to the connection point with 2 is shown by a solid line.

As shown in FIGS. 7 (a) and 7 (b), when the force in the bending direction is not applied to the connection point between the insertion port 1 and the receiving tube 2, the insertion side jig 3 And the receiving jig 4 are arranged substantially orthogonal to the pipe axes of the insertion pipe 1 and the receiving pipe 2.

Further, each bolt shaft 61 is arranged in a direction substantially orthogonal to the insertion side jig 3 and the receiving side jig 4, that is, substantially parallel to the pipe axes of the insertion tube 1 and the receiving tube 2.

As shown in FIG. 8A, the insertion side jig 3 follows the insertion tube 1 and operates integrally, so that the insertion portion 1a of the insertion tube 1 with respect to the receiving tube 2 It is tilted downward so that the receiving side jig 4 is tilted following the insertion side jig 3 via the connector 6, and is slid in the axial direction.

At this time, as shown in FIGS. 8A and 8B, each bolt shaft 61 is tilted following the receiving side jig 4.

Further, the nuts 62 and 63 are still in contact with the insertion side jig 3 and the receiving side jig 4, and the function of preventing the insertion tube 1 and the receiving tube 2 from coming off is maintained.

Specifically, as shown in FIGS. 8A and 9, when a force in the bending direction acts on the connection portion between the insertion tube 1 and the reception tube 2, the locking member 7 (see FIG. 1). ), The insertion side jig 3 fixed to the insertion tube 1 is operated integrally with the insertion tube 1. At this time, the insertion side jig 3 is restrained from tilting by the locking member 7, which is a tilt suppressing member, but a certain degree of slight tilting is allowed, and the tilting is not regulated. .. The insertion tube 1 and the insertion side jig 3 are attached to the insertion tube 2 with the tip portion 36, which is the contact portion between the front end surface of the upper portion of the insertion side jig 3 and the rear end surface of the receiving tube 2, as a fulcrum. It is bent against it.

On the other hand, the lower end of the receiving side jig 4 is pulled toward the rear end side by the insertion side jig 3 via the connector 6, so that the lower end portion is tilted with respect to the receiving pipe 2 and the receiving side is received. The lower convex portion 42a'of the side jig 4 slides on the outer peripheral surface 2b of the receiving portion 2a and is moved to the rear end side (lower side of FIG. 9), and the upper convex portion 42a of the receiving side jig 4 is moved. It slides on the outer peripheral surface 2b of the receiving portion 2a and is moved to the tip side (upper side in FIG. 9).

Further, the upper rear end portion 42e of the receiving side jig 4 is in contact with the outer peripheral surface 2b of the receiving portion 2a, and excessive inclination of the receiving side jig 4 with respect to the receiving tube 2 is restricted. .. That is, the rear end portion 42e functions as a tilt regulating portion that regulates the tilt of the receiving side jig 4.

Further, when the insertion port 1 and the receiving tube 2 are bent, the relative position and the relative angle between the insertion side jig 3 and the receiving side jig 4 change, and the bolt shaft 61 is on the receiving side. In order to follow the jig 4, the relative angle of the bolt shaft 61 with respect to the insertion side jig 3 changes.

At this time, since the bolt shaft 61 arranged at the upper part and the lower part of the receiving side jig 4 can move relative to the radial direction in the elongated hole 33 of the insertion side jig 3, the bolt shaft 61 is the insertion side jig. Even if the bolt shaft 61 is tilted relative to the bolt shaft 61, the load applied to the bolt shaft 61 can be released.

Further, as the bolt shaft 61 described above moves relative to each other in the elongated hole 33, the nut 63 screwed into the bolt shaft 61 is radially along the end surface of the bulging portion 32 of the insertion side jig 3. Since it can slide and move relative to each other, even if the nut 63 tilts relative to the insertion side jig 3 along with the bolt shaft 61, the load applied to the nut 63 and the bolt shaft 61 can be released. There is.

Further, as shown in FIG. 8B, the bolt shaft 61'and the long hole 33'arranged at positions offset by 90 degrees in the circumferential direction from the bolt shaft 61 and the long hole 33 arranged at the upper and lower portions are Since the dimensional relationship is such that relative movement in the vertical direction is almost unacceptable, when a force in the bending direction acts on the connection point between the insertion port 1 and the receiving tube 2, the bolt shaft 61'and the elongated hole 33' The insertion tube 1 and the insertion side jig 3 tilt relative to the receiving tube 2 and the receiving side jig 4 with the contact portion of the above as a fulcrum. In this way, the insertion tube 1 and the insertion side jig 3 are tilted relative to the receiving tube 2 and the receiving side jig 4, so that the bolt shaft 61'and the elongated hole 33' are sheared. You can let go of power. Further, since the amount of relief in the long hole 33 of the bolt shaft 61 with respect to the bending direction differs in the circumferential direction depending on the amount of relief in the long hole 33'of the bolt shaft 61'and other long holes 33, it is particularly flexible to bending. It can demonstrate its properties and rigidity. This is particularly effective when bending and detachment occur at the same time.

Further, when an excessive force in the bending direction acts on the connection portion of the receiving portion 2a and the insertion portion 1a from the state of FIGS. 8A and 9A, the bolt shaft 61 moves relative to the elongated hole 33 described above. In addition to the relative movement of the nut 63 with respect to the bulging portion 32, bending occurs in the bolt 61 as shown in FIG. 10A, so that the force in the bending direction can be dispersed and released. At this time, since the elongated hole 33 has a radial opening size that allows bending of the bolt 61, it does not come into contact with the bolt 61 and there is no possibility that local stress will occur.

Further, as shown in FIG. 10B, the bolt shaft 61'and the long hole 33'arranged at positions offset by 90 degrees in the circumferential direction from the bolt shaft 61 and the long hole 33 arranged at the upper and lower parts are Since the dimensional relationship is such that relative movement in the vertical direction is almost unacceptable, when a further force in the bending direction acts on the connection point between the insertion port 1 and the receiving tube 2, the bolt shaft 61'and the long hole The bolt shaft 61'bends slightly with the contact portion of 33' as a fulcrum.

As described above, when a force in the bending direction acts on the connection portion of the receiving portion 2a and the insertion portion 1a due to an external force, the locking member 7 suppresses the tilting of the insertion portion 1a, and the insertion portion is suppressed. The bolt shaft 61 of the connector 6 that connects the insertion side jig 3 that moves following the portion 1a and the reception side jig 4 that tilts with respect to the reception portion 2a is the insertion side jig 3. Since the nut 63 that cooperates with the bolt shaft 61 can slide and move relative to the bulging portion 32 provided with the long hole 33, the bolt shaft 61 is subjected to shearing. The force can be flexibly released, the load applied to the bolt shaft 61 can be reduced, and the bolt shaft 61 can be prevented from being damaged. Therefore, it is possible to exert a high detachment prevention function even against an external force acting in multiple directions.

Further, the inner peripheral portion of the receiving port side jig 4 has a convex portion 42a that abuts on the outer peripheral surface 2b of the receiving port portion 2a that bulges toward the outer diameter side of the receiving tube 2. According to this, the convex portion 42a of the receiving side jig 4 is brought into contact with the outer peripheral surface 2b that bulges toward the outer diameter side of the receiving portion 2a, whereby the receiving side jig 4 and the receiving portion 2a are brought into contact with each other. Since the contact area with the receiver can be reduced, the receiving side jig 4 can be easily tilted with respect to the receiving portion 2a.

Further, since the convex portion 42a of the receiving side jig 4 has a curved surface shape in the axial cross-sectional view, the receiving side jig 4 is slid on the outer peripheral surface 2b of the receiving part 2a in the axial direction. It is easy and the receiving side jig 4 can be smoothly tilted with respect to the receiving portion 2a. Further, it is possible to prevent the convex portion 42a from biting into the outer peripheral surface 2b of the receiving portion 2a and damaging it.

Further, the inner peripheral portion of the receiving end side jig 4 is provided with a rear end portion 42e as a tilt limiting portion at a position axially separated from the convex portion 42a, and this rear end portion 42e is a receiving portion. Since it comes into contact with the outer peripheral surface 2b of 2a, it is possible to regulate excessive tilting of the receiving side jig 4 with respect to the receiving portion 2a.

Further, since the rear end portion 42e has a curved surface shape, it is possible to prevent the rear end portion 42e from biting into the outer peripheral surface 2b of the receiving portion 2a and damaging it.

Further, since the receiving side jig 4 has an annular shape, the receiving side jig 4 can be used regardless of the direction in which the bending force acts on the connection point between the insertion tube 1 and the receiving tube 2. It can be tilted properly.

Further, since the receiving side jig 4 is formed into an annular shape by the two divided bodies 41 and 41, the receiving portion 2a in which the annular receiving side jig 4 bulges toward the outer diameter side from the straight pipe portion. It can be easily attached to the outer peripheral surface 2b.

Further, since the elongated hole 33 extends in the radial direction, the bolt shaft 61 can be guided in the radial direction along the elongated hole 33. That is, it is possible to prevent the opening tube 1 and the receiving tube 2 from sliding relatively in the direction orthogonal to the tube axis.

Next, the pipe coupling device according to the second embodiment will be described with reference to FIGS. 11 to 14. It should be noted that the description of the same configuration as that of the first embodiment and the overlapping configuration will be omitted.

As shown in FIGS. 11 and 12, in the insertion side jig 302 of the pipe coupling device 112 of the second embodiment, a plurality of bulging portions 322 bulging toward the outer diameter side of the base portion 312 are equal in the circumferential direction. Six are provided in this embodiment apart from each other. An elongated hole 33 is formed in the bulging portion 322. The quantity of the bulging portion 322 and the elongated hole 33 may be freely changed.

Further, on the inner diameter side of the base portion 312, a plurality of accommodating recesses 342 that open toward the outer peripheral surface of the insertion portion 1a are provided evenly spaced in the circumferential direction, and three accommodating recesses 342 are provided in this embodiment. The locking member 72 is housed in the recess 342. The quantities of the accommodating recess 342 and the locking member 72 may be freely changed.

Further, in the outer diameter portion of the base portion 312, a plurality of screw holes 352 penetrating in the radial direction are equally spaced in the circumferential direction between the adjacent bulging portions 322, and six are formed in this embodiment. A push bolt 8 is screwed into each screw hole 352. The quantities of the screw holes 352 and the push bolts 8 may be freely changed.

As shown in FIGS. 11 and 13, the receiving side jig 402 is composed of two arc-shaped divided bodies 421 and 412 in this embodiment. The number of divisions of the receiving side jig 402 may be freely changed.

In this receiving-side jig 402, a plurality of insertion holes 43 are evenly spaced in the circumferential direction at positions corresponding to the elongated holes 33 of the insertion-side jig 302 in the circumferential direction, and six are formed in this embodiment. The bolt shaft 61 is inserted into the insertion hole 43. The quantity of the insertion holes 43 may be freely changed according to the quantity of the elongated holes 33.

As shown in FIGS. 13 and 14, the split body 412 includes a base portion 422A and connecting portions 422B and 422C provided at both ends of the base portion 422A. Since the base portion 422A has substantially the same structure as the base portion 42A of the first embodiment except for the number of insertion holes 43, the description thereof will be omitted.

The connection portion 422B provided at one end of the base portion 422A extends from the tip end side of the base portion 422A in the circumferential direction with a width smaller than the axial width of the base portion 422A, and the hole 43a constituting the insertion hole 43 is provided. It is formed.

The connection portion 422C provided at the other end of the base portion 422A extends from the rear end portion side of the base portion 422A in the circumferential direction with a width smaller than the axial width of the base portion 422A, and is a hole constituting the insertion hole 43. 43b is formed.

Next, a procedure for assembling the receiving side jig 402 to the receiving portion 2a will be described with reference to FIGS. 11 and 13.

When assembling the receiving port side jig 402 to the receiving port portion 2a, first, the connecting portions 422B and 422C of the divided bodies 421 and 412 are superposed in the axial direction. Next, after inserting the bolt shaft 61 into the holes 43a and 43b superimposed in the axial direction, the nut 62 and the nut 64 are fastened so as to sandwich the connection portions 422B and 422C from both sides in the axial direction, thereby holding the receiving side jig 402. It is configured in a ring shape with respect to the receiving portion 2a of.

In this way, since the divided bodies 421 and 412 are connected to each other by using the bolt shaft 61 and the nuts 62 and 64, it is not necessary to separately prepare a connecting means for connecting the divided bodies 421 and 412 to each other. The number of parts can be reduced. In addition, the structure can have both flexibility and rigidity that are effective against bending.

Further, since the connecting portions 422B and 422C are connected by the bolt shaft 61 and the nuts 62 and 64 so as to sandwich the connecting portions 422B and 422C from both sides in the axial direction, the receiving side jig 402 is inserted with the connection points between the divided bodies 421 and 412. It is easier to follow the insertion side jig 302 than other parts connected to the mouth side jig 302. Therefore, by arranging the connection points between the divided bodies 411 and 412 in advance at positions where the insertion tube 1 and the reception tube 2 can easily move relative to each other due to an external force, the insertion side jig 302 and the reception side jig 302 can be cured. The jig 402 can easily follow the relative movement between the insertion tube 1 and the reception tube 2.

Next, the pipe coupling device according to the third embodiment will be described with reference to FIGS. 15 and 16. It should be noted that the description of the same configuration as that of the first embodiment and the overlapping configuration will be omitted.

As shown in FIG. 15, the receiving pipe 200 of the third embodiment is provided with a flange portion 200b projecting to the outer diameter side at the rear end portion of the receiving portion 200a. The flange portion 200b is provided with the same number (8 in this embodiment) of through holes 200c penetrating in the axial direction at positions corresponding to the elongated holes 33 of the insertion side jig 3.

The through hole 200c is arranged on the inner diameter side of the insertion hole 43 of the receiving side jig 4 of the first embodiment. The insertion side jig 3 in the third embodiment is the same as the insertion side jig 3 in the first embodiment.

Next, the procedure for connecting the insertion tube 1 and the receiving tube 200 will be described.

First, the insertion side jig 3 is inserted through the insertion tube 1, and the insertion side jig 3 is deposited in the insertion tube 1. Next, the insertion tube 1 is inserted into the receiving tube 200 via the seal member 50. The seal member 50 is housed in a recess 200d which is connected to the end surface 200e of the receiving portion 200a and is formed on the inner peripheral surface.

Next, the T-head bolt 601 is inserted from the tip side into the elongated hole 33 of the insertion port side jig 3 and the through hole 200c of the receiving tube 200, and the nut 603 is fastened to the T-head bolt 601 from the rear end side. .. As a result, the insertion side jig 3 is relatively attracted to the flange portion 200b, and the tip portion 36 of the base portion 31 of the insertion side jig 3 presses the rear end surface of the seal member 50 in the axial direction for insertion. The sealing property between the mouth portion 1a and the receiving portion 200a is improved.

Next, by tightening each push bolt 8 of the insertion side jig 3 and causing the claw portion 71 of the locking member 7 to bite into the outer peripheral surface 1b of the insertion portion 1a, the insertion tube 1 and the receiving tube 200 are formed. Connection is completed.

As described above, since the through hole 200c is arranged on the inner diameter side of the insertion hole 43 of the receiving side jig 4 of the first embodiment, as shown in FIG. 16, the shaft portion of the T-head bolt 601 is provided. Is arranged on the inner diameter side of the elongated hole 33 of the insertion side jig 3. As described above, since the elongated hole 33 of the insertion port side jig 3 extends in the radial direction, it can correspond to various receiving portions and insertion portions having different radial dimensions.

In the first to third embodiments, the elongated hole 33 of the insertion-side jig 3 has a constant width in the circumferential direction. For example, FIG. 1 is a modification of the present invention. As shown in 17, the elongated hole 330 of the insertion side jig 303 may have different widths in the circumferential direction between the inner diameter side portion 330a and the outer diameter side portion 330b.

Specifically, in the elongated hole 330, the outer diameter side portion 330b is formed wider in the circumferential direction than the inner diameter side portion 330a. Further, the bolt shaft 61 can be inserted into the inner diameter side portion 330a with a gap formed in the circumferential direction. In other words, the width of the inner diameter side portion 330a in the circumferential direction is formed to be slightly larger than the diameter of the bolt shaft 61.

As described above, since the width of the elongated hole 330 in the circumferential direction is larger than the diameter of the bolt shaft 61, in addition to the relative movement of the insertion portion 1a and the receiving portion 2a in the bending direction, the insertion portion 1a and the receiving portion 1a are received. It can also follow the relative movement in the circumferential direction with the mouth portion 2a, that is, the twist.

Further, since the outer diameter side portion 330b of the elongated hole 330 is formed wider in the circumferential direction than the inner diameter side portion 330a, the bolt shaft 61 is formed according to the turning radius of the bolt shaft 61 inserted into the elongated hole 330. It is possible to secure a movement allowance in the circumferential direction. That is, it is possible to secure a moving allowance in the circumferential direction of the bolt shaft 61 inserted through the outer diameter side portion 330b having a long moving distance in the twisting direction.

The elongated hole may have a T-shape in which the outer diameter side portion is larger in the circumferential direction than the inner diameter side portion, and the inner diameter side portion and the outer diameter side portion are larger than the radial center portion. May also have a large shape in the circumferential direction (that is, a gourd shape).

Further, in the first to third embodiments, the bolt shaft 61 is directly inserted into the long hole 33 of the insertion side jig 3 and the insertion hole 43 of the receiving side jig 4, and the nuts 62 and 63 are fixed to the insertion side. The form of direct contact with the tool 3 and the receiving side jig 4 has been exemplified, but the present invention is not limited to this, and for example, as shown in FIG. 18 as a modification 2 of the present invention, the insertion port is inserted via the spacers 120 and 120. The connector 6 may be attached to the side jig 3 and the receiving side jig 4.

Specifically, the spacer 120 is made of a material softer than a metal such as synthetic resin or rubber, and has a tubular portion 121 through which the bolt shaft 61 can be inserted and a tubular portion 121 in the outer diameter direction from one end of the tubular portion 121. It is equipped with an overhanging collar 122.

The tubular portion 121 is arranged between the bolt shaft 61 and the elongated hole 33 or the insertion hole 43, and the flange portion 122 is located between the nut 62 and the receiving side jig 4 or between the nut 63 and the insertion hole. It is arranged between the side jig 3 and the side jig 3. According to this, since the metal-to-metal connecting tool 6 does not come into direct contact with the insertion side jig 3 and the receiving side jig 4, the connecting tool 6 or the insertion side jig 3 and the receiving side jig 4 It is possible to prevent damage. Further, it is preferable that the spacer 120 is made of a material such as a non-conductive synthetic resin or rubber, and by doing so, the effect of electric corrosion protection can be obtained.

Further, in Examples 1 to 3, the embodiment in which both end faces in the radial direction of the elongated hole 33 of the insertion side jig 3 extend substantially parallel to the pipe axis is exemplified, but as a modification 3 of the present invention, for example. As shown in FIG. 19, the radial end surfaces 331a and 331b of the elongated hole 331 of the insertion side jig 304 are tapered so as to expand toward the tip side (that is, the receiving side jig 4 side). It may be formed in. According to this, when the relative angle between the bolt shaft 61 and the insertion side jig 304 changes, the bolt shaft 61 and the radial both end faces 331a and 331b of the elongated hole 331 can be prevented from coming into contact with each other. Further, even when the relative angle between the bolt shaft 61 and the insertion side jig 304 changes and the bolt shaft 61 is momentarily elastically deformed, the radial end surfaces 331a and 331b of the bolt shaft 61 and the elongated hole 331 are formed. It can be prevented from coming into contact with each other, and the load applied to the bolt shaft 61 can be released. The elongated hole may be formed so that the peripheral edge on the distal end side expands toward the distal end side over the entire circumference.

Although examples of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these examples, and any changes or additions that do not deviate from the gist of the present invention are included in the present invention. Will be.

For example, in the first to third embodiments, the locking member is exemplified as the tilt suppressing portion, but it can be freely changed as long as it suppresses the tilt of the insertion side jig with respect to the insertion portion.

Further, in Examples 1 to 3, the embodiment in which the insertion hole of the insertion side jig is an elongated hole extending in the radial direction is exemplified, but the present invention is not limited to this, and for example, the insertion hole is larger than the diameter of the shaft portion of the bolt. It may be a hole having a substantially circular shape in the axial direction, which is large and smaller than the outer diameter of the nut.

Further, in the first and second embodiments, the embodiment in which the inner peripheral portion of the receiving port side jig is a concave portion opening to the inner diameter side is exemplified, but the present invention is not limited to this, and the inner peripheral portion can be tilted with respect to the receiving portion. However, for example, a disk having a rectangular cross section may be used.

Further, the receiving side jig is not limited to being configured in an annular shape, and a split body having a bolt insertion hole may be separately attached to the receiving portion so as to be separated in the circumferential direction.

Further, in Examples 1 and 2, the embodiment in which the connector is composed of a bolt shaft and two or three nuts is exemplified, but the nut may be fixed to one end of the bolt shaft, or the head. It may be composed of a bolt and a nut having a portion.

Further, in the first embodiment, the nut 62 is arranged only on the axial tip side of the vertical portion 42c of the receiving side jig 4, but the nut may be arranged also on the rear end side. Further, it may be possible to position the bolt shaft 61 by sandwiching it with both nuts, but it may be possible to position the bolt shaft 61 by sandwiching it with both nuts. It is good to have both.

1 Insertion pipe (pipeline component)
1a Insertion part 1b Outer peripheral surface 2 Receiving pipe (pipeline component)
2a Receptacle 2b Outer peripheral surface (part that bulges toward the outer diameter)
3 Jig on the insertion side 4 Jig on the receiving side 6 Connector 7 Locking member (tilted suppression part)
11 Pipe coupling device 20 Receptacle pipe (pipeline component)
33, 33'long hole (insertion hole)
41 Divided body 42a Convex part (inner peripheral part)
42b Extension (inner circumference)
42e Rear end part (inner circumference part, tilt control part)
43 Insertion holes 61, 61'Bolt shaft (bolt)
62, 63, 64 Nut 72 Locking member (tilted blocker)
112 Pipe coupling device 120 Spacer 200 Receptacle pipe (pipeline component)
200a Receiving part 200b Flange part 200c Through hole 302 to 304 Insertion side jig 330 Long hole 330a Inner diameter side part 330b Outer diameter side part 331 Long hole 331a, 331b Radial end surface 402 Receiving side jig 412 Divided body 422B , 422C connection

Claims (9)

It is attached to the receiving side jig attached to the outer peripheral surface of the receiving portion of one pipeline constituent member and the outer peripheral surface of the insertion portion of the other conduit constituent member to be hermetically inserted into the receiving portion. A pipe connection provided with an insertion side jig, a plurality of bolts and nuts for axially connecting the receiving side jig and the insertion side jig, and preventing the pipeline constituent members from being separated from each other. It ’s a device,
The insertion side jig is provided with a tilt suppression portion that suppresses tilting with respect to the insertion portion, an insertion hole having a shape that allows relative movement of the bolt and nut, and the insertion hole of the bolt and nut. It has a bulge that allows relative movement and
The receiving side jig is a pipe connecting device having an inner peripheral portion that is tiltably attached to the receiving portion. The pipe coupling device according to claim 1, wherein the inner peripheral portion of the receiving side jig has a convex portion that abuts on a portion of the receiving portion that bulges toward the outer diameter side. .. The pipe connecting device according to claim 2, wherein the convex portion has a curved surface shape. The inner peripheral portion of the receiving end side jig is provided at a position axially separated from the convex portion, and has a tilting regulating portion that abuts on the outer peripheral surface of the receiving portion and regulates tilting. The pipe coupling device according to claim 2 or 3, wherein the pipe coupling device is provided. The pipe coupling device according to claim 4, wherein the tilt control unit has a curved surface shape. The pipe coupling device according to any one of claims 1 to 5, wherein the receiving side jig has an annular shape. The pipe connecting device according to claim 6, wherein the receiving side jig has an annular shape formed by a plurality of divided bodies. The pipe coupling device according to any one of claims 1 to 7, wherein the insertion hole is an elongated hole extending in the radial direction. The pipe coupling device according to claim 8, wherein the portion on the outer diameter side of the elongated hole is formed wider in the circumferential direction than the portion on the inner diameter side of the elongated hole.

Images