JP2014074458A - Branch pipe connection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branch pipe connection device that connects a branch pipe to a housing divided so as to be mountable from a radial direction with respect to the outer peripheral surface of a fluid pipe, and can prevent relative movement, such as opening of the division part of the housing, even in a case where bending due to an earthquake or the like acts on the branch pipe.SOLUTION: In a branch pipe connection device that connects a branch pipe 10 along the division surface of a housing 2 divided so as to be mountable from a radial direction with respect to the outer peripheral surface of a fluid pipe 1, a division part relative movement prevention member 5 is mounted over the division surface of a branch pipe connection part 9 of the housing 2.

Description

  The present invention relates to a branch pipe connecting device, and more specifically, a branch that connects branch pipes arranged along a split surface of a housing that is split so that the outer peripheral surface of a fluid pipe can be mounted in a radial direction. The present invention relates to a pipe connection device.

  In the conventional branch pipe connecting device, when an external force is applied in the direction in which the branch pipe is pulled out, the projection of the housing and the recess of the branch pipe are engaged, and the tapered surface formed in the recess and the outer surface of the projection Even when an external force is applied to the branch pipe by pressing in the direction of tightening the mating surface of the housing formed in two cracks by bringing the wedge surface into contact with the tapered surface formed in In addition, an invention that prevents the two split surfaces of the housing from opening is known (see, for example, Patent Document 1).

  Further, in the conventional branch pipe connecting device, a connecting portion for connecting the branch pipe from the radial direction is provided between the divided casings, and the branch pipe is connected to the casing with an elastic sealing material interposed therebetween, An invention is known in which the branch pipe and the casing are configured to be relatively swingable by elastic deformation of the sealing material, thereby improving the earthquake resistance (see, for example, Patent Document 2).

Japanese Patent No. 4777074 (pages 2 to 3, FIGS. 2, 5, and 6) Japanese Patent No. 3447349 (2nd page, FIG. 4)

  However, the invention described in Patent Document 1 corresponds to the case where an external force is applied in the direction in which the branch pipe is pulled out, and cannot cope with the case where a bending moment is applied to the branch pipe. It was.

  Moreover, in patent document 2, it is limited to the relative rocking | fluctuation possible range by the elastic deformation of a sealing material, and when the bending which exceeds this acts on a branch pipe, the division | segmentation surface of a housing | casing will open. There was a problem.

  The present invention has been made paying attention to such a problem, and is a branch pipe connection for connecting a branch pipe to a housing that is divided so that it can be attached to the outer peripheral surface of the fluid pipe from the radial direction. An object of the present invention is to provide a branch pipe connecting device that can prevent relative movement such as opening of a split portion of a housing even when bending due to an earthquake or the like acts on the branch pipe.

In order to solve the above-mentioned problem, the branch pipe connection device of the present invention includes:
In a branch pipe connecting device for connecting a branch pipe along a split surface of a casing that is split so as to be attachable from the radial direction to the outer peripheral surface of the fluid pipe, the split pipe connecting portion of the casing has a split face A split part relative movement preventing member is mounted across the bridge.
According to this feature, even when a bending due to an earthquake or the like acts on the branch pipe, it is possible to prevent relative movement of the split surface of the branch pipe connecting portion of the housing, for example, the opening and displacement of the split face.

The branch pipe connecting device of the present invention is
The said division part relative movement prevention member is comprised from the ring-shaped member which can be externally fitted to the cyclic | annular protrusion part formed in the front-end | tip of a branch pipe connection part.
According to this feature, the annular projecting portion of the branch pipe connecting portion is backed up over the entire circumference, so that the relative movement of the split surface of the branch pipe connecting portion is prevented. In addition, deformation of the branch pipe connecting portion due to the entire branch pipe connecting portion being reinforced by the split portion relative movement preventing member is also prevented.

The branch pipe connecting device of the present invention is
The ring-shaped member is integrally formed.
According to this feature, not only the relative movement of the split surface of the branch pipe connection portion of the housing is prevented, but also the deformation of the branch pipe connection portion is prevented more firmly.

The branch pipe connecting device of the present invention is
The ring-shaped member is formed by being divided into a plurality of parts in the circumferential direction.
According to this feature, the split part relative movement preventing member can be easily attached to and detached from the annular projecting part of the branch pipe connecting part.

The branch pipe connecting device of the present invention is
The split portion relative movement preventing member is formed of an H-shaped member that can be fitted into a recess having a substantially H-shaped cross section formed in the tube axis direction of the branch pipe across the split surface of the branch pipe connecting portion. It is a feature.
According to this feature, since the split portion relative movement preventing member can be mounted on the branch pipe connecting portion main body, there is no need to provide an annular protrusion for mounting the split portion relative movement preventing member.

The branch pipe connecting device of the present invention is
The split portion relative movement preventing member is formed of a U-shaped member that can be fitted into a substantially U-shaped concave section formed in the tube axis direction of the branch pipe across the split surface of the branch pipe connecting portion. It is characterized by that.
According to this feature, since the split portion relative movement preventing member can be mounted on the branch pipe connecting portion main body, there is no need to provide an annular protrusion for mounting the split portion relative movement preventing member.

The branch pipe connecting device of the present invention is
The split part relative movement preventing member is formed of a substantially C-shaped member having a cross-section capable of tightly fitting the flange across the outer surface of the split flange of the branch pipe connecting part.
According to this feature, it is not necessary to perform special processing for mounting the split portion relative movement preventing member on the branch pipe connecting portion.

The branch pipe connecting device of the present invention is
The split portion relative movement preventing member is formed by a substantially U-shaped member having a cross-section that can narrow the flange from the distal end side across the outer surface of the flange of the split surface of the branch pipe connecting portion.
According to this feature, it is not necessary to perform special processing for mounting the split portion relative movement preventing member on the branch pipe connecting portion.

The branch pipe connecting device of the present invention is
A spacer divided into a plurality of portions in the circumferential direction is interposed between the split portion relative movement preventing member and the flange portion provided in the vicinity of the connecting portion of the branch pipe, so that the split portion relative movement preventing member is detached. It is characterized by being prevented.
According to this feature, the separation of the divided portion relative movement preventing member can be reliably prevented.

The branch pipe connecting device of the present invention is
The split portion relative movement preventing member and the flange portion provided in the vicinity of the connecting portion of the branch pipe have a substantially U-shaped cross-section and a joining member divided into a plurality in the circumferential direction of the branch pipe connecting portion. It is characterized by being fitted over the end face flange and the flange, and fixing the branch pipe connecting part and the branch pipe and preventing the separation of the split part relative movement preventing member.
According to this feature, it is possible to fix the casing and the branch pipe in the axial direction without providing a positioning flange for axial positioning at the end of the branch pipe and a recess for housing the positioning flange in the casing. In addition, it is possible to prevent separation of the split portion relative movement preventing member.

1 is a plan sectional view showing a branch pipe connecting device in Embodiment 1. FIG. It is a side view which shows the branch pipe connection apparatus in Example 1. FIG. It is AA sectional drawing of FIG. It is a top sectional view showing the branch pipe connecting device in Example 1, and is a figure showing the state where the switching valve for uninterrupted flow branching is inserted and the branch pipe is connected after drilling in the fluid pipe. It is a plane sectional view showing a modification of a branch pipe connecting device in Example 1. It is a plane sectional view showing a branch pipe connecting device in Example 2. It is a BB arrow line view of FIG. FIG. 6 is a plan cross-sectional view showing a branch pipe connecting device in Embodiment 3. It is CC sectional drawing of FIG. It is a front view which shows the branch pipe connection apparatus in Example 4. It is a front view which shows the branch pipe connection apparatus in Example 5. It is a front view which shows the branch pipe connection apparatus in Example 6. FIG.

  EMBODIMENT OF THE INVENTION The form for implementing the branch pipe connection apparatus which concerns on this invention is demonstrated below based on an Example.

  The branch pipe connection device according to the first embodiment will be described with reference to FIGS. 1 to 5. In the following, fluid pipes are arranged in the direction from the left side to the right side in FIG. 1 and branch pipes are arranged on the lower side of FIG. 1, and the lower side of FIG. It demonstrates as a front side (front side).

  As shown in FIG. 1, the branch pipe connection device of the present invention mainly includes a housing 2 divided in a horizontal direction so that it can be attached to the outer peripheral surface of the fluid tube 1 from the radial direction, and a housing 2. And a split portion relative movement preventing member 5 mounted across the split surface of the branch pipe connecting portion 9. In FIG. 1, the lower housing 2a and the like below the split surface are shown.

  The fluid pipe 1 of the present embodiment is made of, for example, ductile cast iron for waterworks buried in the ground, is formed in a substantially circular shape in cross section, and has an inner peripheral surface covered with a mortar layer. The fluid pipe according to the present invention may be made of other metals such as cast iron and steel, or made of asbestos, concrete, vinyl chloride, polyethylene, or polyolefin. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. In this embodiment, the fluid in the fluid pipe is clean water, but is not limited to clean water in this embodiment. For example, in addition to industrial water, agricultural water, sewage, etc., gas or gas-liquid mixture of gas and liquid It does not matter.

  As shown in FIGS. 2 and 3, the housing 2 fixedly attached to the outer peripheral surface of the fluid pipe 1 covers the outer circumference of the fluid pipe 1 in a sealing manner, and is divided into upper and lower parts. The lower housing 2a and the upper housing 2b are hermetically connected via flanges 3a and 3b to form a cylindrical cup-shaped valve housing 4 (see FIGS. 1 and 4). A flange 6 for connecting a lower connection flange portion (not shown) (not shown) is formed. The housing attached to the fluid pipe is not necessarily limited to the two-divided structure as in this embodiment, and may be a multiple-divided structure including three or more divided housings. Is preferably inserted in a direction other than the pipe axis direction of the fluid pipe or the branch pipe because high earthquake resistance can be achieved.

  In addition, as shown in FIGS. 1, 3 and 4, in the housing 2, a connecting portion 7 provided with flanges 61 for fluidly connecting both sides of the fluid pipe 1 cut by a drilling machine (not shown), 8, a branch pipe connecting portion 9 is formed on a side surface perpendicular to the straight line connecting the connecting portions 7 and 8, as shown in FIG. The split connection portions 7 and 8 and the branch pipe connection portion 9 are formed in a semicircular shape in each of the lower housing 2a and the upper housing 2b, and form an annular shape by combining the lower housing 2a and the upper housing 2b. Is. Reference numeral 60 denotes a sealing member for fluid-tightly connecting the lower housing 2a and the upper housing 2b, and is attached to a recess formed on the joint surface of the lower housing 2a.

  The branch pipe connecting part 9 includes a split annular projecting part 11 on the distal end side so that a split part relative movement preventing member 5 described in detail later can be attached. The inner diameter of the annular protrusion 11 is slightly larger than the outer diameter of the branch pipe 10, has a certain length in the axial direction, and is thick enough to support the branch pipe 10 even when it is swung by bending or the like. have. Moreover, since the division | segmentation part relative movement prevention member 5 is externally fitted by the outer peripheral surface of the cyclic | annular protrusion part 11, the flanges 3a and 3b are not provided. An annular sealing mounting groove 13 for fluidly connecting the branch pipe 10 is formed on the inner peripheral surface of the branch pipe connecting portion 9, and the seal is compressed between the outer peripheral surface of the branch pipe 10. The elastic sealing material 12 for use is attached. Further, an annular recess 15 into which a flange 14 formed at the tip of the branch pipe 10 can be fitted is formed on the inner side of the branch pipe connecting portion 9 behind the seal mounting groove 13. The stop is made.

  The split portion relative movement preventing member 5 is composed of a ring-shaped member 16 that can be fitted onto an annular protrusion 11 formed at the tip of the branch pipe connecting portion 9 of the housing 2. It is integrally formed. The gap between the inner peripheral surface of the ring-shaped member 16 and the outer peripheral surface of the annular projecting portion 11 is desirably as small as possible. However, for the convenience of mounting, the inner diameter of the ring-shaped member 16 is the outer diameter of the annular projecting portion 11. It is set slightly larger. In addition, the split portion relative movement preventing member 5 opens the split annular protrusion 11 when an earthquake or the like occurs and a large external force is applied that causes the branch pipe 10 to swing with respect to the fluid pipe 1. For example, it is made of a metal material such as steel, and the thickness and the length in the axial direction are set so as to withstand the large external force. When the split part relative movement preventing member 5 is fitted on the annular projecting part 11, the annular projecting part 11 of the branch pipe connecting part 9 is backed up over the entire circumference by the split part relative movement preventing member 5. Relative movement due to opening, bending, twisting, and the like of the divided portion is prevented. Further, since the entire branch pipe connecting portion 9 of the housing 2 is also reinforced, deformation of the branch pipe connecting portion 9 is prevented.

  In order to prevent separation of the split portion relative movement preventing member 5 from the annular protrusion 11, an annular flange 17 is provided on the outer peripheral surface of the branch pipe 10. The annular flange portion 17 has a substantially funnel shape with a cross section opened to the front end side, and has an outer diameter that is substantially the same as the outer diameter of the ring-shaped member 16 that constitutes the divided portion relative movement preventing member 5. A spacer 18 divided in two in the circumferential direction is interposed between the divided portion relative movement preventing member 5 and the flange portion 17.

  As shown by a one-dot chain line in FIG. 3, the spacer 18 has an annular shape so as to be fitted on the outer peripheral surface of the branch pipe 10, and is divided into two in the circumferential direction. The inner diameter of the spacer 18 is larger than the outer diameter of the branch pipe 10, and the outer diameter is substantially the same as the outer diameter of the ring-shaped member 16. The axial length of the spacer 18 is set to be the same as the axial length of the ring-shaped member 16. In addition, the axial length of the spacer may be longer or shorter than the axial length of the ring-shaped member as in this embodiment. A counterbore for mounting the fixing screw 21 and a hole 20 are formed on the split surface of one half member 18a constituting the spacer 18, and a female screw portion 19 is formed on the split surface of the other half member 18b. The two halved members 18 a and 18 b are fixed by the fixing screws 21 when fitted on the outer peripheral surface of the branch pipe 10.

  FIG. 4 is a view showing a state in which the continuous flow branching switching valve is inserted after the fluid pipe 1 is drilled, and the branch pipe 10 is connected. The lower housing 2a and the upper housing 2b of the housing 2 are integrally fixed by a plurality of bolts 30 (see FIG. 3) via flanges 3a and 3b. A valve box 25 is mounted in the valve housing 4 via a sealing member 26, and is partitioned into three chambers 25 a, 25 b, and 25 c that communicate with the connecting portions 7, 8 and the branch pipe connecting portion 9 by the sealing member 26. Yes. In FIG. 4, the switching valve main body 27 of the continuous flow branching switching valve is in a state in which the rooms 25 a and 25 b leading to the connecting portions 7 and 8 are communicated and the room 25 c leading to the branch pipe connecting portion 9 is closed. An annular elastic seal member 28 is inserted between the both ends of the housing 2 and the outer peripheral surfaces of the connecting portions 7 and 8 of the fluid pipe 1 by push wheels 29 in order to connect both of them in a fluid-tight manner. ing.

  A branch pipe 10 is fitted into the branch pipe connecting portion 9 via an elastic seal material 12, and the split portion relative movement preventing member 5 is attached to the outer peripheral surface of the annular projecting portion 11 on the distal end side of the branch pipe connecting portion 9. It is fitted. In addition, a spacer 18 divided in two in the circumferential direction is interposed between the annular flange 17 on the outer peripheral surface of the branch pipe 10 and the ring-shaped member 16 constituting the divided relative movement preventing member 5. Yes. In this state, the flange 14 at the tip of the branch pipe 10 is fitted into the annular recess 15 on the back side of the branch pipe connecting portion 9, and the axial movement of the branch pipe 10 is restricted.

  In order to connect the branch pipe 10 to the branch pipe connecting portion 9, an elastic seal material 12 and a ring-shaped member 16 constituting the split portion relative movement preventing member 5 are fitted on the outer peripheral surface of the branch pipe 10 in advance. In this state, the branch pipe 10 is inserted into the bifurcated branch pipe connecting portion 9, and the housing 2 is positioned at a position where the flange 14 at the tip of the branch pipe 10 can be fitted into the annular recess 15 of the branch pipe connecting portion 9. The lower housing 2a and the upper housing 2b are integrally fixed. Next, the ring-shaped member 16 constituting the split portion relative movement preventing member 5 is moved from the outer peripheral surface of the branch pipe 10 to the outer peripheral surface of the annular projecting portion 11 of the branch pipe connecting portion 9 and is externally fitted. On the outer peripheral surface of the branch pipe 10 after the ring-shaped member 16 has moved, two split spacers 18 are fitted in the circumferential direction. As shown in FIG. 3, the two halved members 18 a and 18 b of the spacer 18 are fixed by a fixing screw 21 when fitted on the outer peripheral surface of the branch pipe 10. Thereby, the ring-shaped member 16 which comprises the division | segmentation part relative movement prevention member 5 does not detach | leave from the outer peripheral surface of the cyclic | annular protrusion part 11. FIG.

  In a state where the branch pipe 10 is connected to the branch pipe connection portion 9, for example, when a bending moment is applied to the branch pipe 10 due to an external force such as an earthquake, an annular projecting portion divided into two at the tip of the branch pipe connection portion 9 A large force, such as an opening direction, acts on 11. However, in the present embodiment, the split annular projection 11 is backed up over the entire circumference by the integral ring-shaped member 16, so that relative movement due to opening, bending, twisting, or the like is prevented in the divided portion. Further, since the entire branch pipe connection portion 9 is also reinforced by the integral ring-shaped member 16, deformation of the branch pipe connection portion 9 is also prevented.

  FIG. 5 is a plan sectional view showing a modification of the branch pipe connecting device in the first embodiment. The same components as those in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof is omitted.

  In FIG. 5, the two annular projections 11 ′ formed on the distal end side in the axial direction of the branch pipe connecting portion 9 are extended to the distal end side from the portion where the split portion relative movement preventing member 5 ′ is fitted. An annular recess 32 into which one end of the spacer 18 can be fitted is formed in the extended portion. The outer diameter of the annular recess 32 is smaller than the outer diameter of the portion where the divided portion relative movement preventing member 5 ′ is fitted.

  An annular flange portion 17 ′ provided on the outer peripheral surface of the branch pipe 10 extends in the outer diameter direction so as to be substantially orthogonal to the axial direction. The tip end of the annular protrusion 11 ′ is in contact with the inner surface of the flange portion 17 ′, and the axial position of the branch pipe 10 with respect to the housing 2 is determined. The spacer 18 ′ has an annular shape and is divided in two in the circumferential direction, and has flange portions 33 a and 33 b formed so as to protrude inward at both ends, and the outer diameter thereof is a divided portion. It is set to be larger than at least the inner diameter of the ring-shaped member 16 ′ so that the side surface of the ring-shaped member 16 ′ constituting the relative movement preventing member 5 ′ can abut.

  In a state where the split portion relative movement preventing member 5 ′ is fitted on the annular protrusion 11 ′ and the spacer 18 ′ is mounted, one flange portion 33 a of the spacer 18 ′ is in the annular recess 32 of the annular protrusion 11 ′. The other flange portion 33 b is fitted so as to hold the flange portion 17 ′ of the branch pipe 10. The movement of the branch pipe 10 in the insertion direction with respect to the housing 2 is blocked by the contact between the flange portion 17 ′ and the tip of the annular protrusion 11 ′, and the movement of the branch pipe 10 in the direction of separation with respect to the housing 2. Is blocked by the spacer 18 '. Therefore, unlike the case of FIGS. 1 to 4, it is not necessary to provide the flange 14 at the tip of the branch pipe 10 or provide the annular recess 15 in the branch pipe connecting portion 9. In this modification, since the tip of the branch pipe 10 is straight and it is not necessary to provide the flange 14, when the branch pipe 10 is connected to the branch pipe connecting portion 9, the casing 2 is fixed integrally. Since the elastic seal material 12 is attached to the inner surface of the branch pipe connecting portion 9 and the branch portion relative movement preventing member 5 ′ is fitted on the annular protrusion 11 ′, the branch pipe 10 can be fitted into the branch pipe connecting portion 9. There is an advantage that the connection work between them can be simplified.

  Next, a branch pipe connecting device according to a second embodiment will be described with reference to FIGS. In the second embodiment, the structure of the split portion relative movement preventing member is different from the modification of the first embodiment shown in FIG. 5, but the other structure is the same as that of the first embodiment shown in FIG. Yes, the same components are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 7, the divided portion relative movement preventing member 35 in the second embodiment has an annular shape and is divided into two in the circumferential direction. After joining the lower housing 2 a and the upper housing 2 b of the housing 2, For example, it is fitted on the annular projection 11 ′ of the branch pipe connecting portion 9 and is joined at a horizontal position substantially the same as the joining surface of the connection flanges 3a and 3b, for example. Back up to. More specifically, the split portion relative movement preventing member 35 includes a first half ring-shaped member 35a and a second half ring-shaped member 35b, and each joint portion is formed in a hook shape. The joint portion 36 of the first half ring-shaped member 35a is formed in a hook shape opened upward, and the joint portion 37 of the second half ring-shaped member 35b is formed in a hook shape opened downward. Since the two hooks having opposite directions are joined at the time of joining, they are not detached in the radial direction at the joint. The first half ring-shaped member 35a and the second half ring-shaped member 35b are joined from the axial direction. Furthermore, the position where these joint portions 36 and 37 are joined to each other is not necessarily limited to the horizontal position substantially the same as the joint surface between the connection flanges 3a and 3b as in the present embodiment. May be.

  The joining structure of the first half ring-shaped member 35a and the second half ring-shaped member 35b of the split portion relative movement preventing member 35 shown in FIG. 7 is merely an example, for example, one side A magnifying glass-shaped concave portion may be provided on the other side, and a magnifying glass-shaped convex portion may be provided on the other side, and these may be fitted from the axial direction. Further, as shown in FIG. 6, the first half ring-shaped member 35a and the second half ring-shaped member 35b are formed by laminating a plurality of plate-like members in the thickness direction, and the strength is improved. It is configured.

  In this embodiment, since the tip of the branch pipe 10 is straight and it is not necessary to provide the flange 14, when the branch pipe 10 is connected to the branch pipe connecting portion 9, the casing 2 is fixed integrally. Since the elastic seal material 12 is attached to the inner surface of the branch pipe connecting portion 9 and the branch pipe 10 can be fitted into the branch pipe connecting portion 9 in a state where the split portion relative movement preventing member 35 is externally fitted to the annular protrusion 11 ′, In addition to the advantage of simplifying the connection work between the two, the external fitting work of the split portion relative movement preventing member 35 with respect to the annular projecting portion 11 ′ can be easily performed.

  Next, a branch pipe connecting device according to a third embodiment will be described with reference to FIGS. In the third embodiment, the mounting position and configuration of the split portion relative movement preventing member is different from the first embodiment shown in FIGS. 1 to 4, but the other configurations are the first embodiment shown in FIGS. The same components are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 9, the split portion relative movement preventing member 40 according to the third embodiment is formed of an H-shaped member, and is formed on a joint surface between the upper and lower branch pipe connection portions 9 and the connection flanges 3 a and 3 b of the housing 2. As shown in FIG. 8, it has a predetermined length linearly in the axial direction. As shown in FIG. 8, the branch pipe connection portion 9 according to the third embodiment has flanges 3 a and 3 b formed up to the distal end side, and the vicinity of the bases of the flanges 3 a and 3 b on the distal end side of the branch pipe connection portion 9. , A recessed portion 41 is formed for fitting the split portion relative movement preventing member 40 from the distal end side of the branch pipe connecting portion 9 toward the back side in the axial direction. As shown in FIG. 9, the cross-sectional shape of the recess 41 is substantially H-shaped, and the two flange portions 40a and 40b of the split portion relative movement preventing member 40 made of an H-shaped member are respectively connected to the lower housing 2a and the upper portion. It is formed so as to be fitted into the housing 2b.

  By inserting the split portion relative movement preventing member 40 into the recess 41 having a substantially H-shaped cross section of the branch pipe connection portion 9 from the front end side to the back side, the two branch pipe connection portions 9 are firmly coupled. . In this embodiment, since the split portion relative movement preventing member can be mounted in the concave portion 41 of the branch pipe connecting portion 9, there is no need to provide an annular protrusion for mounting the split portion relative movement preventing member.

  Next, a branch pipe connecting device according to a fourth embodiment will be described with reference to FIG. In the fourth embodiment, the mounting position and configuration of the split portion relative movement preventing member is different from the third embodiment shown in FIGS. 8 and 9, but the other configuration is the third embodiment shown in FIGS. The same components are denoted by the same reference numerals, and description thereof is omitted.

  The divided portion relative movement preventing member 45 in the fourth embodiment is formed of a U-shaped member and is provided so as to straddle the joint surface of the branch pipe connecting portion 9 of the housing 2. A recess 46 for fitting the split portion relative movement preventing member 45 from the front end side to the back side of the branch pipe connection portion 9 is formed across the split surface of the front end portion of the branch pipe connection portion 9. The recess 46 has a substantially U-shaped cross section, and the two flange portions 45a and 45b of the split portion relative movement preventing member 45 made of a U-shaped member are disposed in the lower housing 2a and the upper housing 2b, respectively. It is formed so that.

  By inserting a split portion relative movement preventing member 45 composed of a U-shaped member from the front end side toward the back side in the axial direction into the concave portion 46 having a substantially U-shaped cross section of the branch pipe connecting portion 9, The branch pipe connecting portion 9 is firmly coupled. In the present embodiment, since the split portion relative movement preventing member 45 can be mounted in the concave portion 46 of the branch pipe connecting portion 9, it is not necessary to provide an annular protrusion for mounting the split portion relative movement preventing member 45.

  Next, a branch pipe connection device according to Embodiment 5 will be described with reference to FIG. In the fifth embodiment, the mounting position and configuration of the split portion relative movement preventing member is different from the third embodiment shown in FIGS. 8 and 9, but the other configuration is the third embodiment shown in FIGS. The same components are denoted by the same reference numerals, and description thereof is omitted.

  The split portion relative movement preventing member 50 according to the fifth embodiment is formed from a substantially C-shaped member having a cross section that can be narrowed from the left and right sides of the flanges 3a and 3b across the outer surfaces of the flanges 3a and 3b of the split surface of the branch pipe connecting portion 9. It is configured. The split portion relative movement preventing member 50 has a certain width in the axial direction, and is formed, for example, by bending and deforming a plate-like member made of an elastically deformable material so that the cross-sectional shape is substantially C-shaped. Therefore, the gap between the narrow portions 50a and 50b for narrowing the outer surfaces of the flanges 3a and 3b is set to be smaller than the total thickness of the flanges 3a and 3b, so that the gap between the narrow portions 50a and 50b is widened during mounting. Is elastically deformed.

  The two branch pipe connection portions 9 are firmly connected to each other by being tightly attached to the outer surfaces of the flanges 3a and 3b of the branch pipe connection portion 9 using the elastic deformation of the split portion relative movement preventing member 50. In the present embodiment, since the split portion relative movement preventing member 50 can be mounted on the outer surfaces of the flanges 3a and 3b of the branch pipe connecting portion 9, the split portion relative movement preventing member 50 is mounted on the branch pipe connecting portion 9 side. There is no need for special processing. In addition, the division part relative movement prevention member 50 of a present Example may be a member which consists of a cast product with high rigidity, for example, and the branch pipe connection part 9 may be tightly connected by the said rigidity, and may be couple | bonded firmly.

  Next, a branch pipe connection device according to Embodiment 6 will be described with reference to FIG. In the sixth embodiment, the mounting position and configuration of the split portion relative movement preventing member is different from the fifth embodiment shown in FIG. 11, but the other configurations are the same as the fifth embodiment shown in FIG. The same reference numerals are given to the configurations, and description thereof is omitted.

  The split portion relative movement preventing member 55 according to the sixth embodiment is a substantially U-shaped cross-section member that can tightly attach the flanges 3a and 3b from the front end side across the outer surfaces of the flanges 3a and 3b of the split surface of the branch pipe connecting portion 9. It is composed of The split portion relative movement preventing member 55 is formed by bending and deforming a plate-like member made of an elastically deformable material so that the cross-sectional shape is substantially U-shaped, and the outer surfaces of the flanges 3a and 3b are formed. The gap between the narrow portions 55a and 55b to be tightly formed is formed smaller than the total thickness of the flanges 3a and 3b, and is elastically deformed so as to widen the gap between the narrow portions 55a and 55b during mounting.

  The two branch pipe connection portions 9 are firmly connected to each other by being tightly attached to the outer surfaces of the flanges 3a and 3b of the branch pipe connection portion 9 using the elastic deformation of the split portion relative movement preventing member 55. In this embodiment, since the split portion relative movement preventing member 55 can be mounted on the outer surfaces of the flanges 3a and 3b of the branch pipe connecting portion 9, the split portion relative movement preventing member 55 is mounted on the branch pipe connecting portion 9 side. There is no need for special processing. In addition, the division part relative movement prevention member 55 of a present Example may be a member which consists of a cast product with high rigidity, for example, and the branch pipe connection part 9 may be narrowly connected and firmly couple | bonded by the said rigidity.

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

DESCRIPTION OF SYMBOLS 1 Fluid pipe 2 Case 2a Lower housing 2b Upper housing 3a, 3b Flange 4 Valve housing 5, 5 'Split part relative movement prevention member 6 Flange 7, 8 Connection part 9 Branch pipe connection part 10 Branch pipe 11, 11' Annular protrusion Portion 12 Elastic seal member 13 Seal mounting groove 14 Flange 15 Annular recess 16, 16 'Ring-shaped member 17, 17' Hook 18, 18 'Spacer 19 Female thread 20 Counterbore and hole 21 Fixing screw 25 Valve box 26 Seal Member 27 Switching valve main body 28 Elastic seal member 29 Push ring 30 Bolt 32 Annular recesses 33a and 33b Flange part 35 Dividing part relative movement preventing members 36 and 37 Joining part 40 Dividing part relative movement preventing member 41 Concave part 45 Dividing part relative movement preventing member 46 Concave part 50 Dividing part relative movement preventing member 55 Dividing part relative movement preventing member 60 Sealing member 61 Flange

Claims (10)

  In a branch pipe connecting device for connecting a branch pipe along a split surface of a casing that is split so as to be attachable from the radial direction to the outer peripheral surface of the fluid pipe, the split pipe connecting portion of the casing has a split face A branch pipe connecting device, wherein a split portion relative movement preventing member is mounted across the branch pipe connecting device.   2. The branch pipe connection device according to claim 1, wherein the split portion relative movement prevention member is configured by a ring-shaped member that can be fitted onto an annular protrusion formed at a tip of the branch pipe connection portion.   The branch pipe connecting device according to claim 2, wherein the ring-shaped member is integrally formed.   The branch pipe connecting device according to claim 2, wherein the ring-shaped member is divided into a plurality of parts in the circumferential direction.   The split portion relative movement preventing member is formed of an H-shaped member that can be fitted into a recess having a substantially H-shaped cross section formed in the tube axis direction of the branch pipe across the split surface of the branch pipe connecting portion. The branch pipe connection device according to claim 1, wherein   The split portion relative movement preventing member is formed of a U-shaped member that can be fitted into a substantially U-shaped concave section formed in the tube axis direction of the branch pipe across the split surface of the branch pipe connecting portion. The branch pipe connection device according to claim 1.   The said division part relative movement prevention member is comprised from the cross-sectional substantially C-shaped member which can narrowly fit the said flange ranging over the outer surface of the flange of the split surface of the said branch pipe connection part. The branch pipe connecting device described.   The split part relative movement preventing member is formed of a substantially U-shaped member having a cross-sectional shape capable of tightly fitting the flange from the distal end side across the outer surface of the flange of the split surface of the branch pipe connecting part. Item 2. The branch pipe connecting device according to Item 1.   A spacer divided into a plurality of portions in the circumferential direction is interposed between the split portion relative movement preventing member and the flange portion provided in the vicinity of the connecting portion of the branch pipe, so that the split portion relative movement preventing member is detached. The branch pipe connection device according to claim 1, wherein the branch pipe connection device is prevented.   The split portion relative movement preventing member and the flange portion provided in the vicinity of the connecting portion of the branch pipe have a substantially U-shaped cross-section and a joining member divided into a plurality in the circumferential direction of the branch pipe connecting portion. The outer fitting is performed across an end face flange and the flange, and the branch pipe connecting portion and the branch pipe are fixed and the split portion relative movement preventing member is prevented from being detached. Branch pipe connection device.

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