JP2016017608A - Pipe unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe unit capable of freely setting a direction of separation flow passage and a fixing direction of a valve device for opening and closing the separation flow passage and at the same time capable of easily updating a fluid pipe under non-cut flow state.SOLUTION: This invention relates to a pipe unit 1 comprising a pipe passage neck part 4 communicated with a pipe passage part 2 and having a communication hole 4b to which a valve main body 3 for opening and closing the pipe passage part 2 can be fixed; and at least one flow-divided neck part 6 to which a valve device 10 for opening and closing a divided flow passage of a pipe passage part 5. The pipe unit 1 comprises at least the first pipe passage part 2 having the pipe passage neck part 4 and the second pipe passage part 5 having the flow-divided neck part 6. The first and second pipe passage parts 2, 5 are connected to each other by a pipe connection part 9 that can be relatively rotated.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pipe unit that enables a fluid pipe to be diverted in an uninterrupted state.

  A conventional pipe unit that allows a fluid pipe to be diverted in an uninterrupted flow state is connected to a pipe body (pipe section) through which fluid flows and the pipe body (pipe section). A gate opening / closing part (pipe neck) having a communication hole to which a gate valve (valve body) to be opened / closed can be attached, and a stop for opening / closing a temporary pipe (split flow path) for branching the flow of the pipe (pipe part). A water stop valve attaching / detaching portion to which a water valve (valve device) can be attached. (For example, refer to Patent Document 1).

JP 2013-108250 A (page 6, FIG. 7)

  However, in patent document 1, since the attachment position of the gate valve and the water stop valve is fixed, the relative rotational position of the gate valve and the water stop valve cannot be changed. Therefore, even if it is difficult to dig in the temporary piping route as a result of the construction excavation, the original temporary piping route must be excavated, and an advantageous temporary piping route can be selected by changing the original temporary piping route. There was a problem that could not be done.

  The present invention has been made paying attention to such problems, and can freely set the direction of the branch flow path and the mounting direction of the valve device that opens and closes the branch flow path, and can be easily fluidized in a continuous flow state. It is an object to provide a pipe unit that can renew a pipe.

In order to solve the above problems, the pipe unit of the present invention is
A pipe neck that has a communication hole that communicates with the pipe section and can be attached to a valve main body that opens and closes the pipe section; and at least one branch neck that can be attached to a valve device that opens and closes the branch flow path of the pipe section. The pipe unit comprises at least a first pipe section having the pipe neck and a second pipe section having the branch neck, and the first and first pipe units. The two conduit portions are connected to each other by a relatively pivotable tube connecting portion.
According to this feature, according to the excavation situation of the construction, the pipe unit uses at least a first pipe part having a pipe neck part and a second pipe part having a branch neck part using a pipe connection part. It can be used by setting the direction of the diversion path provided in the second pipe section and the direction in which the valve device for opening and closing the diversion path is set by relative rotation.

The tube unit of the present invention is
The pipe connecting portion includes at least a receiving portion and an insertion portion.
According to this feature, the tube unit can be used by setting the direction of the diversion channel and the direction of attachment of the valve device that opens and closes the diversion channel using the receiving port and the insertion port.

The tube unit of the present invention is
The pipe connecting portion includes a flange portion provided on each outer peripheral portion of the receiving portion and the insertion portion, an external fitting holder that externally fits both the flange portions, and the external fitting holder that includes the both flange portions. And a connecting means that allows the first and second pipe sections to rotate relative to each other.
According to this feature, in the tube unit, the first and second pipe sections are in a relative state with the outer fitting holder engaged with the flanges provided on the outer peripheral parts of the receiving part and the insertion part. Since the connecting means that can be rotated is provided, the direction of the diversion channel and the diversion channel provided in the second pipe part according to the excavation situation of the work without the separation of the receiving part and the insertion part during construction. It can be used by setting the mounting direction of the valve device for opening and closing.

The tube unit of the present invention is
The pipe neck and the diversion neck are each provided with an opening to which a work valve that allows the valve body and the valve device to be attached and detached can be attached, and the pipe neck and the diversion neck seal the opening, and A plug body for sealing the communication hole and the branch flow path is configured to be attachable.
According to this feature, the pipe unit can be sealed with a plug after being removed from the valve body and the valve device using working valves attached to the openings provided in the pipe neck and the diverting neck. Can be used with fewer parts.

The tube unit of the present invention is
The working valve attached to the pipe neck is arranged substantially perpendicular to the pipe neck and in the pipe axis direction of the first pipe.
According to this feature, since the working valve is disposed perpendicular to the pipe neck and in the pipe axial direction of the pipe section, the pipe unit can be used without increasing the amount of excavation.

(A) is a top view which shows the pipe unit of this invention, (b) is a front view of a partial cross section. (A) is the AA arrow directional view of Fig.1 (a), (b) is the BB arrow directional view of Fig.1 (a). (A) is a view taken along the line CC of (b), (b) is a diagram showing a state where a cover is attached to the opening of the pipe neck, and (c) is a cover removed covering the opening of the pipe neck. FIG. It is a figure which shows the state which attached the working valve to the opening part of the pipe neck part. (A) is a figure which shows the state which has arrange | positioned the valve main body attaching / detaching machine in order to remove the valve main body attached to the pipe neck part, (b) is a figure which shows the state which attached the valve main body attaching / detaching machine to the valve main body. (A) is a figure which shows the state which operated the valve main body attaching / detaching machine, pulled out the valve main body from the pipe neck, and closed the work valve, (b) is a side view of the valve main body attaching / detaching machine. It is a figure which shows the state which pulled out the valve main body from the pipe neck part completely. (A) is a figure which shows the state which attached the plug to the pipe neck part, (b) is a figure which shows the state which attached the new valve apparatus to the pipe neck part. (A) is a figure which shows the state which attached the diversion side work valve in the opening part of the plug body attachment / detachment machine and the diversion neck part, and (b) is a figure which shows the procedure at the time of attaching a diversion side work valve. The figure which shows the state which pulled out the plug body from the diversion neck part by operating the plug body attachment and detachment machine, and closed the diversion side work valve, and (b) the state which pulled out the plug body from the diversion neck part completely It is. (A) is a figure which shows the state which set the valve apparatus to the diverting neck part, (b) is a figure which shows the state which attached the valve apparatus to the diverting neck part. (A) is a figure which shows the fluid pipe line before a fluid pipe update, (b) is a figure which shows the state which updated the fluid pipe | tube of the 1st work area using the pipe unit of this invention, (c) is the 1st work area. The figure which shows the state which removed the shunt pipe after completion of an update, (d) is the figure which shows the state which updated the fluid pipe of the 2nd work area using the pipe unit of this invention, (e) is after the 2nd work area update completion It is a figure which shows the state which removed the shunt pipe. (A) is a top view which shows the state which accommodated the pipe unit of this invention in the valve bowl, (b) is an EE arrow line view of (a). It is a figure which shows the state which has arrange | positioned the shunting neck part of a pipe unit vertically upwards. (A) is a figure which shows the modification of the connection part of a pipe unit, (b) is a figure which shows the state which temporarily fixed the external fitting holder. (A) is the figure which used the diversion neck part of the pipe unit as a digestive plug, (b) is the figure which used the diversion neck part of the pipe unit as an air valve. (A) is the figure which used the division | segmentation neck part of the pipe unit as a sludge pipe, (b) is the figure which used the pipe unit as a manifold of a pump station.

  Hereinafter, the form for implementing the pipe unit which concerns on this invention is demonstrated with reference to FIGS. 1-17.

  As shown in FIGS. 1 and 2, the pipe unit 1 includes a first pipe line part 2 and a second pipe line part 5. The first pipe section 2 has a pipe neck 4 having a pipe communication hole 4b that can be attached to the valve main body 3 that communicates with the first pipe section 2 and opens and closes the first pipe section 2. Is provided. Further, the second pipe line portion 5 is provided with a flow dividing neck portion 6 that can attach a flow dividing plug body 7 that seals the flow dividing communication hole 6b and the flow dividing opening 6f. As will be described later, not only the valve main body 3 but also a pipe plug body 14 (see FIG. 8A) can be attached to the pipe neck 4 instead of the valve main body 3. In addition to the diversion plug 7, the valve device 10 can be attached instead of the diversion plug 7 (see FIG. 11).

  The tube unit 1 is connected by a tube connection portion 9 that enables relative rotation between the first conduit portion 2 and the second conduit portion 5. The pipe connecting portion 9 includes an insertion portion 2b formed in the first conduit portion, a receiving portion 5b formed in the second conduit portion 5, and between the receiving portion 5b and the insertion portion 2b. The sealing member 9a to be inserted, the flange portion 5c provided on the outer peripheral portion of the receiving portion, the flange portion 2c provided on the outer peripheral portion of the insertion portion, and the external fitting holder externally fitted to the flange portions 5c and 2c 8 is provided. The outer fitting holder 8 has a divided structure composed of a plurality of outer fitting holder pieces 8a and 8b, and a plurality of bolts and nuts 8c provided at the connecting portions of both outer fitting holder pieces 8a and 8b. By tightening, the external fitting holder 8 and the flanges 5c and 2c can be held together in a strong holding state.

  Thus, since the pipe unit 1 is connected by the pipe connection part 9 which enables the relative rotation of the first pipe part 2 and the second pipe part 5, the first pipe part The circumferential relative position of the second pipe neck 4 and the branch pipe 6 of the second pipe 5 with respect to the pipe axis can be freely set. Therefore, in the construction for renewing the fluid pipe as will be described later, even if it is difficult to excavate the root of the shunt pipe during excavation work, the pipe neck 4 and the second neck 2 of the first pipe section 2 It is possible to set the relative rotation position of the diverting neck portion 6 of the pipe line portion 5 and set it as the route of the diverting tube that facilitates excavation. After the setting, the pipe connecting portion 9 of the pipe unit 1 is held outside. By using the tool 8 to be in a strong holding state, the first pipe part 2 and the second pipe part 5 can be reliably held by positioning at the relative rotation position.

  Next, the pipe neck 4 and the valve body 3 will be described. As shown in FIG. 2A, the pipe neck 4 has a pipe cylinder 4a and an inner peripheral surface of the pipe cylinder 4a so as to surround the hole 2a formed in the first pipe 2. A pipe communication hole 4b that communicates with the hole 2a, a pipe neck end face 4d that communicates with the pipe communication hole 4b, and a flange 4c that communicates with the pipe neck end face 4d are formed.

  On the other hand, the valve body 3 includes a valve body 3a that can open and close the first pipe line portion 2, a valve lid 3b that closes the pipe communication hole 4b, and a valve body 3a that protrudes from the upper surface of the valve lid 3b. A valve stem portion 3d for opening and closing, a packing box 3c having a packing 3g for sealing the outer peripheral surface of the valve stem portion 3d, and a valve body cylinder portion 3f inserted along the pipe passage hole 4b And a plurality of sealing members 3e and 3e that are fitted into an annular groove on the outer periphery of the valve main body cylinder portion 3f and spaced apart from each other by a predetermined distance in the axial direction of the pipe passage hole 4b. Then, the pipeline opening 4f is sealed in a state where the pipeline opening 4f is disposed between the plurality of sealing members 3e and 3e spaced apart by a predetermined interval. The sealing member 3e can be further improved in sealing performance by using a bump or finned rubber 3e 'as shown in FIG. 7 as well as a semi-cylindrical or circular packing.

  Moreover, the cross-sectional shape of the pipe neck 4 is adapted to the valve body 3a, and is formed in a substantially elliptical shape so that the fluid force applied to the valve lid 3b becomes small. The cross-sectional shape of the pipe neck 4 is not limited to an ellipse, but may be a substantially oval shape, a substantially rectangular shape, or the like, as long as it matches the valve body 3a and can reduce the fluid force applied to the valve lid 3b. In order to determine the direction of the main body 3a and to prevent rotation, it is preferably non-circular.

  As shown in FIGS. 1B, 2A and 3, the pipe neck 4 is provided with a pipe opening 4f. The pipe opening 4f is used as a mounting hole for a work valve described later, and the pipe neck 4 can be opened and closed by the work valve. The pipe opening 4f is covered from the outside by a pipe neck cover 12, sealed by a packing 12d provided on the pipe neck cover 12, and spaced apart in the axial direction of the outer periphery of the valve body cylinder 3f. It is also sealed by the provided sealing member 3e.

  Next, the diversion neck 6 and the diversion plug 7 will be described. As shown in FIG. 2 (b), the diverting neck portion 6 surrounds the hole portion 5a formed in the second duct portion 5, and the inner peripheral surface of the diverting tube portion 6a is a hole portion. A diversion communication hole 6b that communicates with 5a, a diversion neck end face 6d that communicates with the diversion communication hole 6b, and a flange 6c that communicates with the diversion neck end face 6d are formed.

  On the other hand, the diversion plug 7 has a diversion plug cylinder 7a inserted along the diversion communication hole 6b, and is fitted into an annular groove on the outer periphery of the diversion plug cylinder 7a. There are a plurality of sealing members 7b, 7b held at a predetermined distance apart in the axial direction. The diversion opening 6f is sealed in a state where the diversion opening 6f is disposed between the plurality of sealing members 7b, 7b spaced apart by a predetermined interval. Further, the space between the branching neck end face 6d and the plug flange 7c is sealed by a bolt / nut 7d and a sealing member 6e. In addition, the cross-sectional shape of the diverting neck portion 6 is formed in a substantially circular shape so as to match the pipe line shape of the valve device 10. By doing in this way, the valve apparatus 10 can be rotated and installed around the pipe axis of the diverting neck part 6, and the operation part position of the valve apparatus 10 can be changed arbitrarily.

  As shown in FIG. 2B, the diverting neck 6 is provided with a diverting opening 6f. The diversion opening 6f is used as a work valve mounting hole described later, and the diversion neck 6 can be opened and closed by the work valve. Further, the diversion opening 6 f is covered with a diversion neck cover 13. The diversion neck cover 13 has the same configuration as the pipe neck cover 12, and the diversion opening 6f is sealed by a packing 11d provided in the diversion neck cover 13, and provided on the outer periphery of the diversion plug cylinder 7a. The pair of sealing members 7b, 7b is also sealed.

  The pipe unit 1 of the present invention has a structure in which a valve main body 3 attached to a pipe neck 4 and a diversion plug 7 attached to a diversion neck 6 can be attached and removed in an uninterrupted state. Hereinafter, a procedure for attaching and removing the valve body 3 to the pipe neck 4 will be described with reference to FIGS. 3 to 8.

  As a first step, as shown in FIG. 3, the pipe neck cover 12 covering the pipe opening 4f is removed. First, the bolts and nuts 12e that press the lid member 12b are loosened, the pressing plate 12a is moved to the first conduit portion 2 side, and the holding claws 12c and the conduit tube portion formed at the end of the pressing plate 12a The engagement with the claw 4h formed on 4a is released, and the pressing plate 12a and the lid member 12b are removed from the duct opening 4f.

  As a second step, as shown in FIG. 4, the work valve 60 is attached to the pipeline opening 4f. Here, the working valve 60 will be described. The working valve 60 includes a working valve body 62 that partitions the pipe opening 4f, a working valve box 61 that houses the working valve body 62, and projects from the outside of the working valve box 61 to open and close the working valve body 62 from the outside. For this purpose and a holder 64 for fixing the work valve box 61 to the pipe tube portion 4a. Then, the work valve box 61 of the work valve 60 configured as described above is attached to the pipe opening 4f, and the work valve box 61 is fixed to the pipe cylinder 4a by the holder 64 and the bolt / nut 65.

  As a third step, as shown in FIG. 5, the valve body attaching / detaching machine 70 is attached. Here, the valve body attaching / detaching machine 70 will be described. The valve body attaching / detaching machine 70 includes a holding frame 71, a feed screw 72 attached to the holding frame 71, a handle 73 for rotating the feed screw 72, and a valve body holder 74 attached to the feed screw 72. . The holding frame 71 includes an upper plate 71a, a pair of side plates 71b, a pair of bottom plates 71c, and bolts and nuts 71d for movably fixing the upper plate 71a and the pair of side plates 71b, and the pair of side plates 71b. A clamping claw 75 including an upper clamping claw 75a that is movable up and down and a fixed lower clamping claw 75b is provided.

  First, as shown in FIG. 5A, the above-described valve body attaching / detaching machine 70 is loosened by loosening the bolts and nuts 71d for fixing the pair of bottom plates 71c and the upper plate 71a and the pair of side plates 71b. With the side plate 71b opened in the left-right direction, the flange 74b of the valve body holder 74 is placed in contact with the valve lid 3b. Next, as shown in FIG. 5 (b), the pair of side plates 71b are moved toward the feed screw 72, and the pair of bottom plates 71c are arranged at the lower part of the flange portion 4c. 74b and the valve lid 3b are clamped by clamping claws 75a and 75b and fixed by bolts and nuts 71d to complete the mounting of the valve body attaching / detaching machine 70.

  As a fourth step, as shown in FIG. 6A, the work valve 60 is operated to remove the valve body 3. First, the fixing portion 3h (see FIG. 2A) is removed, the handle 73 is turned, and the valve body 3 is gradually pulled up. And while maintaining the sealing state of the sealing member 3e on the first conduit portion 2 side among the plurality of sealing members 3e, 3e provided in the valve body 3, the work valve 60 inserted from the conduit opening portion 4f is provided. Pull up to a position where it does not interfere with the valve body 3. Then, the valve body 63 of the working valve 60 is operated to close the working valve body 62 until the working valve body 62 is seated on the seat 4g provided on the inner periphery of the pipe neck 4. After the working valve body 62 is closed, the handle 73 is further rotated to remove the valve body 3.

  Finally, as FIG. 7 shows, the temporary mounting stand 78 is arrange | positioned between the flange part 4c and the valve cover 3b, the weight of the valve main body 3 is hold | maintained, and the valve main body attaching / detaching machine 70 is disassembled and removed. In this way, the valve main body 3 can be removed from the first conduit portion 2 in an uninterrupted state. After removing the valve body, as shown in FIG. 8A, when the pipe plug body 14 is attached to the pipe neck 4 and sealed, or when the old valve body needs to be replaced with a new valve body. As shown in FIG. 8B, a new valve body 3 ′ can be replaced.

  Next, a procedure for attaching and removing the diversion plug body 7 from the diversion neck 6 will be described with reference to FIGS. 9 to 11.

  Description of the procedure for removing the diverter plug 7 from the diverting neck 6 is omitted for the procedure similar to the procedure for removing the valve body 3 from the pipe neck 4 described above. First, as shown in FIG. 9, the diverting neck cover 13 (see FIG. 2B) covering the diversion opening 6f is removed, and the diversion side work valve 80 is attached to the diversion opening 6f. 85, the diversion-side work valve box 81 is fixed to the diversion neck 6 by the nut 86. Furthermore, the flange holders 91 and 92 of the plug body attaching / detaching machine 90 are attached to the flange portion 6c and the plug body flange 7c.

  Next, as shown in FIG. 10A, the bolts and nuts 7d (see FIG. 9A) for tightening the flange portion 6c and the plug flange 7c are removed, and the handle 94 is operated to turn the feed screw 93. The amount of movement of the diverter plug 7 is confirmed on the scale 95, and the sealing state of the seal member 7b on the second conduit portion 5 side among the plural seal members 7b, 7b provided in the diverter plug 7 is determined. While maintaining, the diverter plug 7 is moved by a predetermined amount. Subsequently, the valve rod 83 of the flow dividing work valve 80 is operated to close the work valve element 82. Thereafter, as shown in FIG. 10 (b), the handle 94 is operated to further rotate the feed screw 93, so that the diversion plug body 7 can be removed from the diversion neck 6 in an uninterrupted state.

  After the valve main body is removed, as shown in FIG. 11, the valve device 10 can be attached to the diverting neck 6 in an uninterrupted state by a procedure reverse to the procedure for removing the diverter plug 7 from the diverting neck 6.

  A procedure for renewing a fluid pipe in an uninterrupted state using the pipe unit 1 described above will be described.

  Here, the fluid is always flowing through the existing pipe 41 in FIG. 12, and the left side in FIG. 12 is the upstream side and the right side is the downstream side. In addition, in FIG. 12, the pipe unit 1 is made of ductile cast iron for waterworks buried in the ground like the existing pipe 41 formed in a substantially circular shape in cross section, and the inner peripheral surface is covered with an epoxy resin. Yes. In addition, the pipe unit 1, the valve body, and the valve device may be made of metal such as cast iron or steel, or made of asbestos, concrete, vinyl chloride, polyethylene, or polyolefin. Furthermore, the inner peripheral surface of the fluid pipe is not limited to an epoxy resin, and may be coated with, for example, mortar 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 is clean water. However, the fluid is not limited to clean water, and may be a gas-liquid mixture of gas, gas, and liquid in addition to industrial water, agricultural water, sewage, and the like.

  First, a description will be given of a procedure for updating the first work area update target section in an uninterrupted flow state in the existing pipe 41 including the existing pipe 41a, the existing valve 41b, and the existing pipe 41c shown in FIG. As shown in FIG. 12 (b), the split T-shaped pipe 42 is installed on the upstream side of the existing valve 41b and the split T-shaped pipe 44 is installed on the downstream side of the first section renewal target section by the continuous flow branching method. The existing pipes 41 a and 41 c are drilled, and an uninterrupted flow stopcock 45 is installed on the upstream side of the split T-shaped pipe 44, and the shunt pipe 43 is disposed so as to span both the split T-shaped pipes 42 and 44. Next, the existing valve 41 b and the uninterrupted flow stopcock 45 are closed and the bypass pipe 43 is bypassed in the opened state of the branch pipe 43. In this state, the existing pipe 41c in the first work area update target section is removed, and the new fluid pipe 46 and the pipe unit 1 of the present invention are installed at the downstream end of the new fluid pipe 46 to complete the update. When the first work area renewal construction is completed, the shunt pipe 43 is removed, and the state shown in FIG.

  Next, the second section renewal target section shown in FIG. 12C is updated. Similarly to the above, as shown in FIG. 12 (d), the split T-shaped pipe 49 is installed in the existing pipe 41c on the downstream side of the second section renewal target section by the continuous flow branching method, and the existing pipe 41c is drilled. Further, a continuous stopcock 50 is installed on the upstream side of the split T-shaped pipe 49, and the branch plug body 7 (FIG. 12C) attached to the divided neck portion 6 of the pipe unit 1 in the updated first section. )) Is replaced with the valve device 10 (FIG. 12D). Subsequently, the flow dividing pipe 48 is disposed so as to span the valve device 10 and the split T-shaped pipe 49. Next, in the opened state of the diversion pipe 48, the valve body 3 and the uninterrupted flow stopcock 50 of the pipe unit 1 in the updated first work section are closed, and the existing pipe 41c is bypassed by the diversion pipe 48. In this state, the existing pipe 41c in the second section renewal target section is removed, the new fluid pipe 51 and the pipe unit 1 'of the present invention are installed, and the update is completed. When the second work zone renewal construction is completed, the flow dividing pipe 48 is removed, and the valve device 10 of the pipe unit 1 of the updated first work section is replaced with the flow diverter 7 so that the state shown in FIG. By repeating this process, the existing pipe can be updated in a continuous flow state.

  Here, since the pipe connection part 9 of the pipe unit 1 is comprised from a receiving part and an insertion part, the diversion neck part 6 and the valve apparatus main body 3 can be rotated relatively. Accordingly, in FIGS. 12B and 12D, the direction of the diverting neck portion 6 of the pipe unit 1 and the mounting direction of the valve device 10 can be set according to the excavation status of the construction, so the initial temporary piping route It is possible to select an advantageous temporary piping route by changing the above, and it is possible to easily renew the fluid pipe in a continuous flow state.

  Moreover, since the pipe unit 1 is provided with the opening which makes it possible to attach a work valve to the pipe neck part 4 and the diversion neck part 6, when necessary in the construction process, the pipe neck part 4 and The valve main body and the valve device can be freely attached to and detached from the diverting neck 6, and the fluid pipe can be easily renewed in an uninterrupted state. In addition, when the valve body, valve device or work valve is no longer needed after the work is completed, the valve body, valve device or work valve can be removed and sealed with a plug. It can be minimized, and rusting from embedded parts can be minimized.

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

  For example, since the pipe unit 1 is composed of at least the first pipe line part 2 and the second pipe line part 5, the interval between the adjacent neck parts of the pipe unit 1, the number of the pipe line parts provided in the pipe unit 1. The combination of the valve body and the valve device can be freely set. For example, as shown in FIG. 13, when the valve main body 3 of the first pipe section 2 and the valve device of the second pipe section 5 are left in the valve casings 20 and 21, the first pipe It is necessary to install the valve body 3 of the passage portion 2 and the valve device 10 of the second conduit portion 5 in a state of being separated by a predetermined distance. Even in such a case, since the pipe unit 1 is composed of a plurality of independent pipe sections, the interval between the adjacent neck parts of the pipe unit 1 can be freely set. Further, since the distance between the adjacent neck portions can be set so that the downstream valve device 10 is not affected by the flow disturbance caused by the upstream valve body 3, pressure loss can be reduced.

  Moreover, as shown in FIG. 14, since the 1st pipe line part 26a and the 2nd pipe line part 26b which comprise the pipe unit 26 can rotate relatively, the valve | bulb of the 1st pipe line part 26a The valve device 28 of the main body 27 and the second pipe line portion 26 b can be disposed on the upper side of the pipe unit 26.

  As shown in FIG. 17B, which will be described later, the pipe unit 22 is composed of three pipe parts 22a, 22b, 22c and connection parts 22d, 22e, and the pipe part 22a is provided at the neck of the pipe part 22a. Valve devices 24 and 25 for diversion can also be provided at the necks of the valve body 23 and the pipe sections 22b and 22c for opening and closing the valve. Further, the combination of the valve main body and the valve device is not limited to this, the valve main body for opening and closing the pipe line portion 22a at the neck part of the pipe line part 22a, and the valve device and pipe line for branching at the neck part of the pipe line part 22b. The neck portion of the portion 22c may be a valve body that opens and closes the conduit portion 22c.

  The pipe connecting part 9 of the pipe unit 1 in the above embodiment is constituted by a receiving part and an insertion part, and the relative rotation position between the first pipe part 2 and the second pipe part 5 is stepless. Adjustable. However, the present invention is not limited to this, and as shown in FIG. 15, asperities are provided on the flanges provided at the outer peripheral portions of the receiving portion 32 a and the insertion portion 32 b of the tube unit 31, and are engaged with the uneven portions. By providing the external fitting holder 33 with the uneven portion to be performed, the first conduit portion 31a and the second conduit portion 31b can be relatively rotated in stages. For example, as shown in FIG. 15B, at the time of shipment from the factory, the bolts and nuts 34 are tightened with a spacer 35 having a predetermined thickness interposed between the outer fitting holder pieces 33a and 33bb. Therefore, the first pipe part 31a and the second pipe part 31b can be relatively rotated while the separation between the first pipe part 31a and the second pipe part 31b is restricted. At the site, according to the excavation situation, the first pipe part 31a and the second pipe part 31b are relatively rotated, the spacer 35 is removed and positioned, and then the bolts and nuts 34 are moved. By tightening, the first pipeline portion 31a and the second pipeline portion 31b can be fixed in a strong holding state. It should be noted that the scale 36 is formed by casting, casting, painting, or the like on the outer periphery of the receiving port 32a and the insertion port 32b so that the amount of rotation of the first channel 31a and the second channel 31b can be grasped. Can also be provided.

  In addition, although the example which comprised the pipe connection part 9 of the pipe unit 1 from a receptacle part and an insertion part was shown, it uses not only this but a lock ring like connection of a seismic pipe, or a separation prevention push ring is used. May be. Further, the insertion portion and the pipe connection portion including the insertion portion may be connected using a joint ring and a separation prevention push ring, and may be in an optimum shape for relative rotation.

  Moreover, in the said Example, although the example which connects a branch pipe, a temporary bypass pipe, etc. to the branching neck part 6 of the pipe unit 1 was shown, it does not restrict to this but is shown in Fig.16 (a). In addition, the flange 38, the repair valve 39, and the fire hydrant 40 can be connected to the diverting neck portion 36d of the second pipe line portion 36b to be used as a fire hydrant. Furthermore, as shown in FIG. 16B, the repair valve 103 and the air valve 104 can be connected to the diverting neck portion 101d of the second conduit portion 101b to be used as an air valve. In this case, the mating flange 38 and the repair valve 103 are also provided with a plurality of sealing members spaced apart from the cylindrical portion by a predetermined distance as in the diversion plug cylindrical portion 7a (see FIG. 2B). Needless to say, it can be installed and removed.

  For example, as shown in FIG. 17 (a), a valve device 106e, a drain pipe 106f, a gate valve 106g, and a drain pipe 106h are connected to the branch neck 106d of the second pipe section 106b of the pipe unit 106, and the drain pipe 106h is connected. It can also be used as a mud pipe. Further, as shown in FIG. 17B, the pipe unit 22 is composed of three pipe parts 22a, 22b, 22c and connection parts 22d, 22e, and the pipe part 22a is provided at the neck of the pipe part 22a. Valve devices 24 and 25 for diversion are provided at the necks of the valve main body 23 and the pipe sections 22b and 22c to be opened and closed, and can be used as a manifold at the pump station. In the above embodiment, an example in which the tube unit is used as a tube buried in the ground has been shown, but it can also be used as a tube disposed on the ground.

1 Pipe unit 2 First pipe part (pipe part)
2b Insertion part (pipe connection part)
2c collar part 3 valve body 4 pipe neck part 4b pipe communication hole (communication hole)
4f Pipe line opening (opening)
5 Second pipe section (pipe section)
6 Split flow neck 6f Split flow opening (opening)
6b Diverging communication hole 7 Divider plug (plug)
8 External fitting holder 9 Pipe connection part 10 Valve device 14 Pipe part plug (plug)
22 Pipe unit 22a, 22b, 22c Pipe part 22d, 22e Connection part 23 Valve main body 24, 25 Valve device 26 Pipe unit 26a, 26b Pipe part 26c Pipe neck part 26d Split neck part 27 Valve body 28 Valve device 31 Pipe unit 31a 31b Pipe line part 32a Receiving part (pipe connection part)
32b Insertion part (pipe connection part)
33 External fitting holder 36 Pipe units 36a and 36b Pipe line part 36c Pipe line neck part 36d Split flow neck part 60 Work valve 80 Split flow side work valve (work valve)
101 Pipe unit 101a, 101b Pipe line part 101c Pipe line neck part 101d Diverging neck part 102 Valve body 103 Repair valve (valve device)
106 Pipe unit 106a, 106b Pipe line part 106d Dividing neck part 106e Valve body

Claims (5)

  A pipe neck that has a communication hole that communicates with the pipe section and can be attached to a valve main body that opens and closes the pipe section; and at least one branch neck that can be attached to a valve device that opens and closes the branch flow path of the pipe section. The pipe unit comprises at least a first pipe section having the pipe neck and a second pipe section having the branch neck, and the first and first pipe units. 2. A pipe unit characterized in that the two pipe sections are connected to each other by a relatively pivotable pipe connecting section.   The pipe unit according to claim 1, wherein the pipe connection part includes at least a receiving part and an insertion part.   The pipe connecting portion includes a flange portion provided on each outer peripheral portion of the receiving portion and the insertion portion, an external fitting holder that externally fits both the flange portions, and the external fitting holder that includes the both flange portions. The pipe unit according to claim 2, further comprising a connecting unit that allows the first and second pipe sections to be relatively rotatable in a state of being engaged with each other.   The pipe neck and the diversion neck are each provided with an opening to which a work valve that allows the valve body and the valve device to be attached and detached can be attached, and the pipe neck and the diversion neck seal the opening, and The tube unit according to any one of claims 1 to 3, wherein a plug body that seals the communication hole and the branch channel is attachable.   5. The pipe unit according to claim 4, wherein the working valve attached to the pipe neck is disposed substantially perpendicular to the pipe neck and in the pipe axis direction of the first pipe. 6.

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