JP6902987B2 - Flow control device and installation method of flow control device - Google Patents

Description

The present invention relates to a flow control device in which a flow control device is installed in a housing for sealing a fluid pipe in a non-interrupted state, and a method for mounting the flow control device.

Conventionally, when a failure such as leakage occurs in a part of the pipeline component that constitutes the flow path, a plug device (control fluid) is installed in the piping around the failed member in a continuous flow state as necessary. At the same time, the water is stopped on the downstream side of the plug device, the water distribution branch pipe and the branch pipe on the downstream side are repaired, or the switching valve (control fluid) is installed in a continuous flow state, and the flow is performed through the switching valve. A bypass road that bypasses the road is temporarily provided, and the member is repaired or replaced with the flow path in the vicinity of the failed member as the minimum water cutoff range (for example, Patent Documents 1 and 2). reference).

In addition, the switching valve controls the flow of fluid toward the main conduit and the bypass passage by a valve body provided inside, and enables construction in a continuous flow state without blocking the entire flow path.

Japanese Unexamined Patent Publication No. 2013-7232 (Page 4, Fig. 3) Japanese Unexamined Patent Publication No. 2005-240892 (Page 3, Fig. 3)

However, in Patent Documents 1 and 2, a failure such as leakage occurred in the fluid itself, the valve, the joint, the deformed pipe, and the like, which constitute the branch fluid branching from the main fluid (pipeline portion). In this case, if the failed member is placed near the branch point of the main pipeline, it is not possible to secure an installation space for the fluid control fluid in the vicinity of the failed member in the branch pipeline. In order to block the flow of fluid, the control fluid should be installed on both the upstream side and the downstream side across the branch point of the main pipeline, and the control fluid should be installed on the downstream side of the failed member in the branch pipeline. Therefore, it was necessary to block the flow in the vicinity of the failed member and to temporarily provide bypass paths to be detoured to the main pipeline side and the branch pipeline side. Therefore, there is a problem that the number of bypass paths temporarily installed in the flow path increases, the range of water cutoff becomes wide, and the construction becomes complicated. At this time, by using the control fluid as a switching valve, it is possible to install a bypass path through these switching valves, but the number of bypass paths temporarily installed in the flow path also increases, and the construction is complicated. There was a problem that it became a thing.

The present invention has been made by paying attention to such a problem, and is a method of attaching a flow control device and a flow control device capable of reducing the number of bypass paths temporarily provided in the flow path and narrowing the water cutoff range. The purpose is to provide.

In order to solve the above problems, the flow control device of the present invention is used.
It is installed in a housing in which a conduit portion of a fluid pipe and a branch portion branching from the pipeline portion are fitted in a sealed manner, and a portion cut off from the pipeline portion and the branch portion in the housing. It is provided with a control fluid that controls the flow path in the fluid pipe.
The housing is characterized by having an opening into which a cutter that can be cut is inserted from the conduit portion and the branch portion.
According to this feature, in a housing in which the pipeline portion and the branch portion of the fluid pipe are sealed, the pipeline portion and the branch portion are excised together by a cutter inserted from the opening, and the excision in the housing is performed. By installing the control fluid at the location in a continuous flow state, it is possible to control the fluid in the pipeline direction and the branch direction at the same time, so it is possible to reduce the number of bypass paths temporarily installed in the flow path and narrow the water cutoff range. it can.

The housing is characterized by having the opening in which the conduit portion can be cut into a substantially C shape by the cutter.
According to this feature, the cutting range of the fluid pipe can be reduced by cutting the pipeline portion in a substantially C shape together with the branch portion of the fluid pipe by the cutter inserted from the opening. Various devices for mounting the flow control device can be miniaturized.

The fluid pipe includes a branch pipe connected to the branch portion, and the housing is characterized in that the connection portion between the branch portion and the branch pipe is externally fitted in a sealed manner.
According to this feature, in a housing in which the pipeline portion of the fluid pipe and the connection portion between the branch portion and the branch pipe are sealed, the connection portion between the pipeline portion and the branch portion and the branch pipe is inserted through the opening. It can be excised together with a cutter.

The housing is composed of a plurality of divided bodies joined to each other, and each of the divided bodies is extended in the pipeline direction of the pipeline portion and is extended in the branching direction of the branch portion. It is supposed to be.
According to this feature, the housing is formed by joining each of the divided bodies extending in the pipeline direction of the pipeline portion of the fluid pipe and the branching direction of the branch portion by welding, bolt / nut joining, or the like. Even if the pipeline portion and the branch portion are cut off in the housing, the rigidity of the fluid pipe can be maintained by the housing that is externally fitted in a sealed manner.

The housing is characterized by including a seat in which the control fluid is installed in a sealed manner.
According to this feature, by installing the control fluid in the seat in the housing, leakage of the fluid between the control fluid and the housing is prevented, and the initial flow path is caused by the control fluid installed in the housing. Control can be performed.

It is an attachment method in which the flow control device is attached to the fluid pipe in a continuous flow state.
A step of enclosing the conduit portion and the branch portion of the fluid pipe in a sealed manner by the housing.
A step of inserting the cutter through the opening and cutting the fluid pipe from the conduit portion to the branch portion.
A step of inserting the control fluid through the opening and sealing the inside of the housing in a sealed manner.
It is characterized by having.
According to this feature, in a housing in which the pipeline portion and the branch portion of the fluid pipe are sealed, the pipeline portion and the branch portion are excised together by a cutter inserted from the opening, and the excision in the housing is performed. By installing the fluid control fluid at the location in a continuous flow state, it is possible to control the fluid in the pipeline direction and the branching direction at the same time. Can be narrowed.

It is a front sectional view which shows the housing of the flow control device attached to the fluid pipe in an Example. It is a top view which shows the housing attached to the fluid pipe. It is a side view which shows the cutting machine installed through the opening of the housing through a work valve. It is a partially enlarged side sectional view which shows the cutter which cuts a fluid tube. It is a top view which shows the inside of the housing cut by a cutter. It is a side view which shows the installation machine installed through the opening of the housing through a work valve. It is a side view which shows the control fluid installed in the housing by the installation machine. It is a partial front sectional view which shows the control fluid installed in a housing. It is a top view which shows the construction example at the time of having installed the flow control device, and repairing / replacing a failed valve provided in a branch straight pipe. It is a partially enlarged side sectional view which shows the diameter adjusting member and the fitting member in the modification 1. FIG. It is a top view which shows the housing attached to the fluid tube in the modification 2. FIG. It is a top view which shows the housing attached to the fluid tube in the modification 3.

A mode for carrying out the flow control device and the mounting method of the flow control device according to the present invention will be described below based on examples.

In the embodiment, as a flow control device and a method of attaching the flow control device, a predetermined portion of the existing fluid pipe 1 constituting the pipeline constituent member is cut in the housing 5, and the control fluid 10 is cut off at the cut portion in an uninterrupted state. A series of flow up to the installation in FIG. 1 will be described with reference to FIGS. 1 to 8. The fluid in the fluid pipe 1 is clean water in this embodiment, but may be, for example, industrial water, sewage, or a gas or a gas-liquid mixture of a gas and a liquid.

The fluid pipe 1 of this embodiment is a ductile cast iron pipe, and as shown in FIGS. 1 and 2, is a deformed pipe having a pipeline portion 2a and a branch portion 2b having a small diameter branching from the pipeline portion 2a. A certain T-shaped pipe 2, a pair of straight pipes 3 and 3 connected to both ends of the pipeline portion 2a of the T-shaped pipe 2 and extending in the pipeline direction, and a pair of straight pipes 3 and 3 connected to the branch portion 2b of the T-shaped pipe 2 in the branching direction. It is composed of an extending straight branch pipe 4 (branch pipe, see FIG. 3), and is formed in a substantially circular shape in cross section. In this embodiment, the conduit direction and the branching direction of the fluid pipe 1 extend in a substantially horizontal direction, so that the T-shaped pipe 2 is arranged so as to form a T-shape in a plan view. The fluid pipe 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, or the like. Furthermore, the inner peripheral surface of the fluid pipe may be coated with an epoxy resin layer, mortar, plating or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe by powder coating.

Here, the fluid pipe of the present invention may be composed of a plurality of pipes connected to each other including at least a deformed pipe as in the present embodiment, or a single pipe such as a steel welded product. It may be a deformed tube. Here, the deformed pipe means, for example, at least one of various deformed parts such as a curved pipe part, a branch part (branch pipe), a cross part (cross pipe), a different diameter part, a joint ring part, a short pipe part, and a drainage part. It is a general term for pipes held in a part.

First, as shown in FIG. 1, the housing 5 constituting the flow control device is fitted to the fluid pipe 1 in a sealed manner. The housing 5 has a plurality of divided structures, and in this embodiment, it is composed of a first divided body 51 (divided body) constituting the upper side and a second divided body 52 (divided body) constituting the lower side. It is mainly composed of a housing body 50 and a pair of joint covers 53 and 53 that are divided into two in the vertical direction. The divided structure of the housing 5 is not limited to this embodiment, and may be divided in the horizontal direction, and the number of divisions may be divided into a predetermined number of 3 or more. Further, the joining between the divided housings is a welding joining in this embodiment, but the joining is not limited to this, and for example, it may be joined by a fastening member such as a bolt or a nut via a packing.

As shown in FIG. 2, the housing body 50 has a pipeline housing portion 50a extending in the pipeline direction along the pipeline portion 2a of the T-shaped pipe 2 and a branch portion 2b of the T-shaped pipe 2. A branch housing portion 50b extending in the branch direction along the branch straight pipe 4 connected to the pipe, and an opening extending in the vertical direction between the pipeline housing portion 50a and the branch housing portion 50b and opening upward. It is formed in a substantially T-shape in the top view from the bottomed substantially cylindrical flow control housing portion 50d (see FIG. 3) having the portion 50c.

In the pipeline housing portion 50a, a pair of joint covers 53, 53 surrounding both ends of the pipeline portion 2a of the T-shaped pipe 2 and the connection portions 30, 30 of the pair of straight pipes 3, 3 are attached to the mounting flanges 50e, 50e. They are joined together with each other. Further, a pair of first push wheels 54, 54, which are divided into upper and lower parts to prevent detachment, are hermetically attached to the openings of the joint covers 53, 53 extending to the connection ends of the straight pipes 3, 3. Here, the sealing position may be on the T-shaped tube 2. Further, before installing the housing 5, the connecting portions 30 and 30 may be reinforced with the detachment prevention metal fittings described later in the second modification.

The branch housing portion 50b extends to the connection end of the branch straight pipe 4 connected to the branch portion 2b of the T-shaped pipe 2, and the opening of the branch housing portion 50b is divided into upper and lower parts to prevent detachment. The push ring 55 is attached in a sealed manner. The division direction and the number of divisions of the first push ring 54 and the second push ring 55 are not limited to this embodiment.

The opening 50c of the flow control housing portion 50d has a radial center located on the branch portion 2b of the T-shaped pipe 2 and a branch portion extending between the pipeline portion 2a and the branch portion 2b of the T-shaped pipe 2. It is formed above. Further, the opening 50c of this embodiment is formed so as to include a connecting portion 40 between the branch portion 2b of the T-shaped pipe 2 and the branch straight pipe 4. Further, before installing the housing 5, the connecting portion 40 may be reinforced with a detachment prevention metal fitting described later in Modification 2.

Next, as shown in FIG. 3, a work valve 6 capable of closing the opening 50c is attached to the mounting flange 50f of the flow control housing portion 50d of the housing 5, and a cutting machine 7 is placed above the work valve 6. Install.

The cutting machine 7 includes a mounting flange cylinder 71, a cutter 72 for cutting the fluid pipe 1, and a drive mechanism for rotating the cutter 72 in the mounting flange cylinder 71 and for advancing / retracting the cutter 72 in the vertical direction. It is mainly composed of 73 and. The cutter 72 is composed of a hole saw 72a having a cutting blade at its tip along the circumferential direction, and a center drill 72b which is arranged coaxially with the rotation axis of the hole saw 72a and protrudes ahead of the cutting blade. As shown by the chain line A in FIG. 2, the hole saw 72a of the cutter 72 is configured concentrically with the opening 50c of the flow control housing portion 50d of the housing 5, and the opening 50c to the housing 5 are controlled. It is inserted into the flow housing portion 50d and can proceed to a position near the bottom of the flow control housing portion 50d.

As a specific step of cutting the fluid pipe 1 by the cutting machine 7, first, a valve body (not shown) inside the working valve 6 is retracted to open the opening 50c of the housing 5, and then as shown in FIG. , The cutter 72 of the cutting machine 7 is rotated and moved downward to cut the fluid pipe 1 in a continuous flow state. In this embodiment, a part of the T-shaped pipe 2 forming the fluid pipe 1 by the hole saw 72a forming the cutter 72 on the branch portion 2b side (see FIG. 2) and the entire branch portion 2b. , And a part of the branch straight pipe 4 connected to the branch 2b of the T-shaped pipe 2 on the branch 2b side is cut at once by the progress of the hole saw 72a. At this time, the position of the center drill 72b is preferably a position avoiding the portion of the connecting portion 40 of the branch portion 2b containing the sealing material, or a position on the branch straight pipe 4.

Further, as shown in FIG. 5, inside the opening 50c of the housing 5 in a plan view, there is a substantially C-shaped cutting port in a plan view on the conduit portion 2a side of the T-shaped tube 2 in a top view, and The cut port of the branch straight pipe 4 can be seen.

Further, since a drain 56 (see FIGS. 2 and 3) capable of discharging the fluid to the outside is attached to the bottom of the flow control housing portion 50d together with a valve that can be opened and closed, the fluid pipe 1 is cut by the cutter 72. The chips generated during the operation can be discharged to the outside together with the fluid. The drain 56 can also be used as a bypass for filling water during fluid control operation.

Further, although not shown, when the fluid pipe 1 is cut by the cutter 72, the section separated from the fluid pipe 1 is held in the hole saw 72a. Then, the cutter 72 is pulled up together with the section into the mounting flange cylinder 71, and the opening 50c of the housing 5 is closed by a valve body (not shown) inside the working valve 6, thereby completing the cutting work of the fluid pipe 1. Further, although the pipeline portion 2a of the T-shaped pipe 2 and the branch straight pipe 4 left in the housing 5 after cutting the fluid pipe 1 by the cutter 72 are separated from each other, the pipeline housing portion of the housing 5 It is integrally held in a state of being surrounded by the 50a and the branch housing portion 50b. Although not particularly shown, the cutting machine 7 is removed while the opening 50c of the housing 5 is closed by a valve body (not shown) inside the work valve 6.

Next, as shown in FIG. 6, since the work valve 6 capable of closing the opening 50c is attached to the mounting flange 50f of the flow control housing portion 50d of the housing 5, it is installed above the work valve 6. Machine 8 can be installed.

The installation machine 8 includes a mounting flange cylinder 81, a valve hanging bracket 82 for suspending and supporting the fluid control fluid 10, and a drive mechanism 83 for moving and retracting the valve suspension bracket 82 in the mounting flange cylinder 81 in the vertical direction. , Is mainly composed of. The control fluid 10 of this embodiment is a so-called plug mainly composed of a partition wall 11 and an upper lid portion 12, and the partition wall 11 has a first seal member S1 extending from a lower end portion to both side portions. A second seal member S2, which is annular, is attached to the upper lid portion 12 over the outer peripheral portion. The first seal member S1 and the second seal member S2 are made of elastic members such as rubber, elastomer, and resin containing NBR, SBR, and CR.

As a specific step of installing the fluid control fluid 10 by the installation machine 8, first, a valve body (not shown) inside the work valve 6 is retracted to open the opening 50c of the housing 5, and then as shown in FIG. The control fluid 10 suspended and supported by the valve suspension fitting 82 of the installation machine 8 is advanced downward, and the control fluid 10 is inserted into a predetermined position in the flow control housing portion 50d of the housing 5.

As shown in FIG. 8, on the inner wall surface of the side portion of the flow control housing portion 50d of the housing 5, a side wall step portion 50g having a substantially U-shaped upper surface that protrudes inward of the housing 5 from other parts, 50 g (seat portion) are formed so as to face each other. Therefore, when the fluid control fluid 10 is inserted into the flow control housing portion 50d of the housing 5, both side portions of the partition wall 11 of the fluid control fluid 10 are guided by the side wall step portions 50g and 50g to control the fluid control. The deviation of the insertion position of the fluid 10 is prevented.

Further, a bottom wall step portion 50h (seat portion) continuous with the side wall step portions 50g and 50g is formed on the bottom inner wall surface of the flow control housing portion 50d of the housing 5 (see FIG. 5). Therefore, the first seal member S1 is attached from the lower end portion to both side portions of the partition wall 11 of the control fluid 10 by inserting the control fluid 10 into the flow control housing portion 50d of the housing 5 at a predetermined depth. Is press-fitted into the bottom wall step portion 50h and the side wall step portions 50g and 50g formed in the flow control housing portion 50d in a sealed manner, and is attached over the outer peripheral portion of the upper lid portion 12 of the control fluid 10. The 2 seal member S2 is pressed against the inner wall surface of the side portion on the opening 50c side of the flow control housing portion 50d of the housing 5.

In this way, the fluid control fluid 10 is installed in the flow control housing portion 50d of the housing 5 so as to partition between the pipeline portion 2a and the branch portion 2b of the T-shaped pipe 2. The leakage of fluid between the housing 5 and the housing 5 is prevented.

Next, a plurality of presser screws N that are provided in the circumferential direction of the opening 50c of the housing 5 and can be moved back and forth in the radial direction are advanced in the inner diameter direction of the opening 50c (see FIGS. 2 and 8). As a result, the pressing screw N is locked so as to press the upper lid portion 12 of the control fluid 10 from above, and the control fluid 10 is prevented from coming out of the opening 50c of the housing 5.

In this way, the presser screw N presses the upper lid portion 12 of the fluid control fluid 10 from above, so that the installation machine 8 and the work valve 6 can be removed from the housing 5.

Next, the top view annular lid member 57 is fixed to the mounting flange 50f of the flow control housing portion 50d of the housing 5. At this time, since the lid member 57 presses the upper surface of the upper lid portion 12 of the control fluid 10 from above, it prevents the control fluid 10 from coming out of the opening 50c of the housing 5 together with the pressing screw N. As a result, the installation of the control fluid 10 in the housing 5 is completed. In addition, it goes without saying that a lid is attached to all windows, penetrations, work holes, etc. in a sealed manner when cutting or installing a valve in a continuous flow state.

As described above, the flow control device of the present embodiment is hermetically fitted to the conduit portion 2a of the T-shaped pipe 2 constituting the fluid pipe 1 and the branch portion 2b branching from the conduit portion 2a. The conduit portion 2a and the branch portion 2b are cut together by the hole saw 72a of the cutter 72 of the cutting machine 7 inserted from the opening 50c, and the cut portion in the housing 5 is cut together. By installing the control fluid 10, it is possible to simultaneously control the fluid in the conduit direction of the conduit portion 2a of the T-shaped pipe 2 and the branching direction of the branch portion 2b, so that the number of bypass paths temporarily provided in the flow path can be reduced. However, the water cutoff range can be narrowed.

Specifically, as shown in FIG. 9, for example, the failed valve V1 is arranged near the branch point of the fluid pipe 1, and the inserting valve V2 is located upstream of the failed valve V1 in the branch straight pipe 4. Even if the installation space cannot be secured, the housing 5 is hermetically fitted to the conduit portion 2a and the branch portion 2b (see FIG. 2) of the T-shaped pipe 2 constituting the branch region of the fluid pipe 1. In the housing 5, the pipeline portion 2a and the branch portion 2b are cut together by the hole saw 72a of the cutter 72 of the cutting machine 7, and the control fluid 10 is installed at the cut portion in the housing 5. Therefore, the flow of the fluid from the pipeline portion 2a of the T-shaped pipe 2 to the branch portion 2b can be blocked while maintaining the uninterrupted flow state of the fluid in the pipeline direction. Therefore, as in the conventional case, in order to maintain the uninterrupted flow state of the fluid in the conduit direction in the conduit portion 2a of the T-shaped tube 2, valves are placed on the upstream side and the downstream side, respectively, with the branch portion of the fluid tube 1 interposed therebetween. It is not necessary to temporarily provide a bypass path that detours from the branch point in the pipeline direction by providing a control fluid), and by installing one control fluid 10, the pipeline direction and branch portion 2b of the conduit portion 2a of the T-shaped pipe 2 The fluid going in the branching direction can be controlled at the same time, and the construction can be simplified. Further, by newly installing an inserting valve V2 on the downstream side of the failed valve V1 in the branch straight pipe 4, a bypass path (not shown) can be temporarily provided to maintain the uninterrupted flow state of the fluid in the branch direction, and the fluid pipe 1 can be maintained. The water cutoff range can be configured as narrow as possible. The inserting valve V2 is not limited to a newly installed one, and an existing one may be used.

Further, the cutter 72 inserted from the opening 50c of the housing 5 cuts the conduit portion 2a together with the branch portion 2b of the T-shaped pipe 2 into a substantially C shape, thereby reducing the cutting range of the fluid pipe 1. Since it can be made smaller, various devices such as a work valve 6, a cutting machine 7, and an installation machine 8 for attaching a flow control device can be made smaller.

Further, inside the opening 50c of the housing 5, there is a C-shaped cutting port on the pipeline portion 2a side of the T-shaped pipe 2 and a branch straight pipe 4 on the branch portion 2b side of the T-shaped pipe 2 in a top view. By allowing the cutter 72 inserted through the opening 50c to enter the housing 5, the conduit portion 2a of the T-shaped pipe 2 and the branch straight pipe 4 can be easily approached.

Further, since the cutter 72 has a hole saw 72a, the conduit portion 2a and the branch portion 2b of the T-shaped pipe 2 can be cut together by rotationally driving the hole saw 72a, and the cutting is easy. is there.

Further, the housing 5 includes a housing body 50 that is divided into upper and lower parts that are joined to each other, and each housing body 50 extends in the pipeline direction along the conduit portion 2a of the T-shaped pipe 2. The pipe housing portion 50a is mainly composed of a branch housing portion 50a extending in the branching direction along the branch straight pipe 4 connected to the branch portion 2b of the T-shaped pipe 2, and is mainly composed of a T-shape. The housing 5 is formed by joining the housing bodies 50 extending in the pipeline direction of the pipeline portion 2a of the pipe 2 and the branching direction of the branch portion 2b of the T-shaped pipe 2 by welding or the like. Even if the conduit portion 2a and the branch portion 2b of the T-shaped pipe 2 are cut off in the housing 5, the rigidity of the fluid pipe 1 can be maintained by the housing 5 that is externally fitted in a sealed manner.

Further, the flow control housing portion 50d of the housing 5 is formed by installing the fluid control fluid 10 in a sealed manner with respect to the side wall step portions 50g and 50g and the bottom wall step portion 50h in the flow control housing portion 50d. Prevents fluid from leaking between the fluid control 10 and the housing 5 (flow control housing 50d), and the initial flow path control is performed by the fluid control 10 installed in the flow control housing 50d of the housing 5. It can be performed.

Further, in the above embodiment, the embodiment in which the cutter 72 of the cutting machine 7 is rotated and advanced downward to directly cut the fluid tube 1 is illustrated, but as a modification 1 of the present invention, as shown in FIG. In the body 5, the diameter adjusting member 100 (adjustment) that adjusts the conduit portion 2a of the T-shaped pipe 2 and the branch straight pipe 4 (branch portion 2b of the T-shaped pipe 2) to have substantially the same diameter above the branch straight pipe 4. Part) may be provided. In this case, by advancing downward while rotating the cutter 72 of the cutting machine 7, the outer peripheral surface of the conduit portion 2a of the T-shaped pipe 2 having a large diameter and the upper end of the outer peripheral surface of the branch straight pipe 4 having a small diameter. The hole saw 72a of the cutter 72 comes into contact with the upper surface of the diameter adjusting member 100 (adjusting portion) provided in the cutter 72 substantially at the same time, in other words, the hole saw 72a of the cutter 72 is on the outer peripheral surface of the conduit portion 2a of the T-shaped pipe 2. Since there is no one-sided contact and the resistance at the time of cutting to the hole saw 72a acts substantially uniformly, the inclination of the cutter 72 is suppressed, so that the conduit portion 2a and the branch portion 2b (branch straight pipe 4) of the T-shaped pipe 2 are suppressed. The cutter 72 makes it easier to cut together. As the material of the diameter adjusting member 100 (adjusting portion), for example, a material having the same rigidity as the conduit portion 2a of the T-shaped pipe 2 to be cut or the branch straight pipe 4 such as a cast iron material or a steel material shall be selected. By doing so, the cutting resistance applied to the pipeline portion 2a, the branch straight pipe 4 and the diameter adjusting member 100 (adjusting portion) by the cutting machine 7 can be made uniform, and cutting is further facilitated.

Further, a cylindrical fitting member 101 (fitting portion) into which the center drill 72b of the cutter 72 is fitted is provided on the outer peripheral surface of the branch portion 2b of the T-shaped pipe 2, so that the fitting member 101 is provided. By inserting and inserting the center drill 72b, the rotation axis of the hole saw 72a arranged coaxially with the center drill 72b can be positioned, so that it is applied to the conduit portion 2a and the branch portion 2b (branch straight pipe 4) of the T-shaped pipe 2. Can be excised together without misalignment. The diameter adjusting member 100 and the fitting member 101 may be fixed to the fluid pipe 1 (T-shaped pipe 2 and branch straight pipe 4) by welding, a band, or the like. Furthermore, the installation position, dimensions, shape, etc. of the diameter adjusting member 100 and the fitting member 101 may be freely configured according to the fluid pipe 1 in which the fluid control fluid 10 is installed. Further, only either the diameter adjusting member 100 or the fitting member 101 may be installed.

Further, in the above embodiment, the flow control housing portion 50d of the housing 5 has a radial center located on the branch portion 2b of the T-shaped pipe 2, and the opening 50c is the pipeline portion 2a of the T-shaped pipe 2. It is formed so as to straddle the branch portion 2b and is connected to a part of the pipeline portion 2a and the entire branch portion 2b of the T-shaped pipe 2 and the branch portion 2b of the T-shaped pipe 2 which form the fluid pipe 1 by the cutter 72. Although a form in which a part of the branched straight pipe 4 is cut is illustrated, as shown in FIG. 11 as a modification 2 of the present invention, the flow control housing portion 150d of the housing 105 has a radial center. Located above the pipeline portion 2a of the T-shaped pipe 2, the opening 150c is formed so as to straddle the conduit portion 2a and the branch portion 2b of the T-shaped pipe 2, and as shown by the chain line B, the cutter 72 It may be configured to cut a part of the conduit portion 2a and the branch portion 2b of the T-shaped pipe 2 together. In particular, in this case, by installing the above-mentioned disconnection prevention metal fittings in the connecting portions 30, 30 and the connecting portion 40 before installing the housing 5, the movement of the pipeline portion 2a at the time of cutting can be prevented and It is preferable to fix the remaining member of the T-shaped tube 2 after cutting. More specifically, the connecting portions 30, 30 and the connecting portion 40 are provided with a seal for sealing these connecting portions by a push ring. Here, a dotted line of FIG. 11 has a main body divided in the circumferential direction, and a locking member (not shown) that bites into the straight pipe 3, the branched straight pipe 4, or the outer peripheral surface of the pipeline portion 2a and locks the main body. The detachment prevention metal fittings are installed by exchanging the bolts and nuts that connect the push ring and the socket one by one, connecting them via the detachment prevention push ring, and letting the locking member bite into them. .. Further, the detachment prevention metal fitting may be a metal fitting having a locking member in the main body divided in the circumferential direction, straddling the push ring, and fitting with the receiving port.

Further, in the above-described embodiment, a mode in which a part of the T-shaped pipe 2 forming the branch region is mainly formed by the pipeline portion 2a and the branch portion 2b is excised, but FIG. 12 shows a modification 3 of the present invention. As shown, the flow control housing portion 250d of the housing 205 is located on the straight pipe 3 connected to the joint ring 202, and the opening 250c straddles the connection portion 230 between the joint ring 202 and the straight pipe 3. As shown by the chain line C, a branch region formed by a cutter 72 together with the connecting portion 230 and a drain, a bypass, etc. (not shown) provided on the bottom surface side of the joint ring 202 or the straight pipe 3 is formed together. It may be configured to be excised. The fluid tube cut by the cutter 72 may have no drain, bypass, or the like.

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 within the scope of the gist of the present invention are included in the present invention. Is done.

For example, in the above-described embodiment, a mode in which a plug is used as the control fluid 10 has been illustrated, but the present invention is not limited to this as long as it controls the fluid of the fluid pipe 1, and for example, the control fluid is a sluice valve. It may be a butterfly valve, a switching valve, or the like.

Further, in the above embodiment, the embodiment in which the branch portion 2b is configured to have a smaller diameter than the conduit portion 2a of the T-shaped pipe 2 constituting the fluid pipe 1 is illustrated, but the conduit portion and the branch portion of the T-shaped pipe are It may have substantially the same diameter.

Further, the fluid pipe 1 cut by the cutter 72 is not limited to the T-shaped pipe, and may be another deformed pipe such as a curved pipe, a reducer, or a cross pipe.

1 Fluid pipe 2 T-shaped pipe 2a Pipe line part 2b Branch part 3 Straight pipe 4 Branch straight pipe (branch pipe)
5 Housing 6 Work valve 7 Cutting machine 8 Installation machine 10 Control fluid 11 Partition wall 12 Top lid part 50 Housing body 50a Pipeline housing part 50b Branch housing part 50c Opening 50d Flow control housing part 50f Mounting flange 50g Side wall Step (seat)
50h bottom wall step (seat)
51 First split body (split body)
52 Second split body (split body)
57 Cover member 71 Mounting flange cylinder 72 Cutter 72a Hole saw 72b Center drill 73 Drive mechanism 81 Mounting flange cylinder 82 Valve hanging bracket 83 Drive mechanism 100 Diameter adjustment member 101 Inserting member 105 Housing 150c Opening 150d Flow control housing 202 Joint Ring 205 Housing 230 Connection 250c Opening 250d Flow control housing

Claims (6)

It is installed in a housing in which a conduit portion of a fluid pipe and a branch portion branching from the pipeline portion are fitted in a sealed manner, and a portion cut off from the pipeline portion and the branch portion in the housing. It is provided with a control fluid that controls the flow path in the fluid pipe.
The housing is a flow control device having an opening into which a cutter that can be cut is inserted so as to extend between the pipeline portion and the branch portion. The flow control device according to claim 1, wherein the housing has an opening capable of cutting the pipeline portion into a substantially C shape by the cutter. The first or second claim, wherein the fluid pipe includes a branch pipe connected to the branch portion, and the housing has a sealed outer fitting of the connection portion between the branch portion and the branch pipe. The described flow control device. The housing is composed of a plurality of divided bodies joined to each other, and each of the divided bodies is extended in the pipeline direction of the pipeline portion and is extended in the branching direction of the branch portion. The flow control device according to any one of claims 1 to 3. The flow control device according to any one of claims 1 to 4, wherein the housing includes a seat portion in which the control fluid is installed in a sealed shape. It is an attachment method in which the flow control device is attached to the fluid pipe in a continuous flow state.
A step of enclosing the conduit portion and the branch portion of the fluid pipe in a sealed manner by the housing.
A step of inserting the cutter through the opening and cutting the fluid pipe from the conduit portion to the branch portion.
A step of inserting the control fluid through the opening and sealing the inside of the housing in a sealed manner.
The method for mounting a flow control device according to any one of claims 1 to 5, wherein the flow control device is provided.

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