JP2019210953A - Flow control device - Google Patents

Abstract

To provide a flow control device that can be configured by cutting a fluid pipe in a housing in an uninterrupted state and installing a control fluid, without interfering with an extension pipe that extends vertically above the housing externally fitted to the fluid pipe.SOLUTION: A flow control device comprises at least a housing 5 having a split structure that externally fits a fluid pipe 3 in a sealed manner, and a fluid control body 10 installed in the housing 5 in which the fluid pipe 3 is cut in an uninterrupted state. A split housing 51 constituting the housing 5 comprises extension pipes 20, 20' at least composed of: a first pipe part 21 extending laterally from the split housing 51; and a second pipe part 25 movable relative to the first pipe part 21 and connected in a sealed manner, and extending above the split casing 51.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a flow control device provided with a fluid control such as a fluid valve inside a casing that encloses a fluid pipe in a sealed manner.

  In a conventional flow control device, a casing having a split structure is fitted in a sealing manner on the outer surface of a fluid pipe as a pipe constituent member, and the fluid pipe in the casing is cut in an uninterrupted state by a cutting device. There is a device that opens and closes a flow path or controls the flow rate by installing a fluid control inside the housing (see, for example, Patent Document 1).

  In such a flow control device, a case of a cutting device is excavated around an existing fluid pipe buried in the ground and communicated vertically above a casing externally fitted to the fluid pipe via a work valve. The cutter disposed in the case is advanced downward in the radial direction of the fluid pipe to cut the fluid pipe, and then the fluid control installation device is connected to the housing instead of the cutting device, The control fluid is installed by moving the control fluid disposed inside downward.

  In addition, as a conventional flow control device, in the case of a flow control device connected to a gas pipe or a water pipe that is a fluid pipe, the fluid accumulated in the housing provided with the fluid control such as a fluid valve is discharged or bypassed to the outside. There exists an apparatus of the form from which the extension pipe | tube for this is extended outward from a housing | casing (for example, refer patent document 2). The extension pipe preferably has an opening / closing portion at its tip extending vertically upward of the housing, that is, an operation shaft extending above the current control device and a valve housing and valve surrounding the current control device. It is desired to arrange them inside a room, a human hole or the like.

Japanese Utility Model Publication No. 64-38365 (page 14, FIG. 6) JP 2001-182861 A (2nd page, FIG. 1)

  However, in Patent Document 1, since it is necessary to advance the cutter of the cutting device from vertically above the casing in which the fluid pipe is externally fitted, such an extension tube described in Patent Document 2 is used as the cutting device. When connecting to the housing provided and attempting to cut the fluid pipe in the housing, there is a problem that the cutting device interferes with the extension pipe, and the tip of the extension pipe is brought to a position vertically above the casing. There is a problem that it cannot be extended.

  The present invention has been made paying attention to such a problem, and without interfering with an extension pipe extending vertically above a casing that is externally fitted to the fluid pipe, the fluid pipe in the casing is provided. An object of the present invention is to provide a current control device that can be configured in such a manner that the control fluid is installed in a continuous flow state and a control fluid is installed.

In order to solve the above-mentioned problem,
A flow control device comprising at least a housing of a split structure that externally fits a fluid pipe, and a fluid control device installed in the housing where the fluid pipe is cut in an uninterrupted state;
The divided casing constituting the casing is connected to the first pipe portion extending laterally from the divided casing and to the first pipe portion so as to be relatively movable and hermetically sealed. And a second tube portion extending above the body, and an extended tube configured at least from the body.
According to this feature, when the second pipe part constituting the extension pipe is moved relative to the first pipe part in a sealed state, the fluid pipe in the housing is cut and the fluid control is installed. Can avoid interference with the extension pipe, and when a flow control device is configured by installing a fluid control in the casing, the distal end side of the extension pipe can be disposed above the casing. .

The second pipe part is characterized in that an open / close valve is provided at an open end part thereof.
According to this feature, the open / close valve provided at the open end of the second pipe part, which is the free end side of the extension pipe, can be easily opened and closed.

The second pipe part has an extension part extending laterally, and is connected to the first pipe part so as to be relatively rotatable.
According to this feature, the amount of movement with the first tube portion can be easily set according to the amount of rotation of the second tube portion without changing the extension dimension of the extension tube.

At least a part of the second pipe portion on the open end side is arranged vertically above the casing.
According to this feature, when the open end side of the extension pipe is arranged vertically above the casing, the casing and the extension can be provided when the upper part of the current control device is covered with a valve casing, a valve chamber, a human hole, or the like. The tip of the outlet tube can be concentrated in the valve housing.

The housing includes a support member that supports the second pipe portion.
According to this feature, the second pipe portion constituting the free end side of the extension pipe can be supported and stabilized by the support member.

A flow control device comprising at least a housing having a split structure that externally fits a fluid pipe, and a fluid control device installed in the housing from which the fluid pipe has been cut,
The split casing constituting the casing is connected to the first pipe portion extending laterally from the split casing and the first pipe portion in a sealed manner, and extends above the split casing. A second pipe part to be taken out, and at least a part of the second pipe part on the open end side is arranged vertically above the casing. It is a feature.
According to this feature, when the second pipe part constituting the extension pipe is hermetically connected to the first pipe part, the fluid pipe in the housing is cut and the fluid control is installed. In addition, it is possible to avoid interference with the extension pipe, and when the flow control device is configured by installing a fluid control in the casing, the open end side of the extension pipe is disposed above the casing. be able to.

It is a front view which shows the housing | casing which comprises the flow control apparatus in an Example. (A) is a top view which shows the housing | casing which comprises a current control apparatus, (b) is a side view similarly. It is a front view which shows the condition of the confirmation test of the pressure resistance of a housing | casing. (A) is a top view which shows the condition which rotates the 2nd pipe part of an extension pipe, (b) is a side view similarly. (A) is a side view which shows the condition which attaches a working valve to a housing | casing, (b) is a front view after attachment. It is a partial cross section front view which shows the condition which attached the pipeline cutting device to the working valve. It is a partial cross section front view which shows the condition which attached the installation machine of the fluid control to the work valve. (A) is front sectional drawing which shows the condition of the confirmation test of the sealing state of a current control apparatus, (b) is a plane sectional drawing similarly. (A) is a top view which shows the condition which rotates the 2nd pipe part of an extension pipe to an inward position, (b) is a side view similarly. It is a front view which shows the current control apparatus which rotated the 2nd pipe part of the extension pipe | tube to the inward position. (A) is a top view which shows the current control apparatus arrange | positioned in a human hole, (b) is a partial cross section side view similarly. It is a partial cross section front view like FIG. (A)-(d) is a principal part expanded sectional view which shows the procedure of the modification which temporarily fixes the fluid control installed in the housing | casing. (A) is a front view which shows the 1st modification which fixes the joint part of a 1st pipe part and a 2nd pipe part, (b) is BB sectional drawing of (a). (A) is front sectional drawing which shows the 2nd modification which fixes the joint part of a 1st pipe part and a 2nd pipe part, (b) is CC sectional drawing of (a).

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

  A flow control device according to an embodiment will be described with reference to FIGS. First, as shown in FIG. 1, a casing 5 constituting a flow control device of the present invention applied to a gas pipe (fluid pipe) as a pipe member 1.

  In the present embodiment, as a flow control device and its installation method, a predetermined portion of a straight pipe 3 which is a gas pipe (fluid pipe) constituting an existing pipe member 1 buried in the ground is placed in the housing 5. A series of flows from the excision to the installation of the current control device at the excision site in an uninterrupted state will be described with reference to FIGS. In addition, although the fluid in the pipe line member 1 is gas in this embodiment, it may be a gas-liquid mixture of gas and liquid in addition to liquids such as clean water, industrial water, and sewage. .

  The straight pipe 3 is a steel pipe, and in this embodiment, as shown in FIGS. 1 and 2, the pipe direction extends in a substantially horizontal direction, and is formed in a substantially straight shape and a substantially circular shape in a sectional view. The fluid pipe according to the present invention may be made of ductile cast iron, stainless steel, or other metal such as cast iron, concrete, vinyl chloride, polyethylene, or polyolefin. 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 pipe member by powder coating.

  Further, the fluid pipes to be cut in the casing 5 to be described later are not limited to the straight pipes 3 as in the present embodiment. For example, a pair of straight pipes extending in the pipeline direction and ends of these straight pipes are used. You may comprise from connecting members, such as a joint ring and a deformed pipe, which are connected in a sealing manner across.

  Below, the installation method of the current control apparatus which concerns on this invention is demonstrated in order of a process. First, the housing assembly process will be described. As shown in FIG. 1, a straight pipe 3 constituting the pipe member 1 is exposed by excavating a predetermined depth from the ground surface to clean the outer surface, and a current control device is applied to the outer surface of the straight pipe 3. The casing 5 to be configured is externally fitted in a sealed manner. The housing 5 has a structure composed of a plurality of divided housings. In this embodiment, the first divided body 51 constituting the upper divided housing and the second divided body constituting the lower divided housing. The main body 50 is mainly composed of a casing main body 50 constituted by 52 and extended pipes 20 and 20 ′ extended from the first divided body 51. The division structure of the housing 5 is not limited to the present embodiment, and may be divided in the vertical direction, for example, and the division number may be divided into a predetermined number of three or more.

  In the present embodiment, the joining of the opposing surfaces of the first divided body 51 and the second divided body 52 and the joining of the inner surface of both ends in the tube axis direction of the housing 5 and the outer surface of the straight pipe 3 are not shown. It is carried out by welding using a welding machine. At this time, a jack 9 of hydraulic pressure or the like is installed between the lower surface of the second divided body 52 and the excavation surface, and the jack 9 is expanded and contracted in the vertical direction so that the straight pipe 3 is kept horizontal while maintaining the centering. It can be done easily. For example, a member such as a bolt / nut or a push ring may be used via a packing for joining the divided housings or joining the housing and the fluid pipe. In this case, the extension tubes 20 and 20 'may be fixed to each other with a sling belt or the like.

  As shown in FIG. 2A, the housing body 50 is extended in the duct direction so as to surround the straight pipe 3, and has an opening 50c that extends in the vertical direction and opens upward. Yes. In addition, you may attach the push ring which aims at prevention of detachment | attachment to the both ends of the pipe line direction of the housing body 50 in a sealed form.

  As shown in FIGS. 3 and 4, the extension pipes 20 and 20 ′ of the present embodiment are diffusion pipes for radiating the gas (fluid) in the housing 5 to the outside in the present embodiment. A pair of left and right are provided in front view of the housing 5 so as to communicate with one side and the other side in the tube axis direction inside the housing 5 partitioned by the fluid 10. The extension pipes 20 and 20 'are symmetrical and have the same structure as shown in the figure, and are provided so as to be rotatable symmetrically in the figure. Therefore, only one extension pipe 20 will be described, and the other extension pipe 20' will be described. Description is omitted.

  The extension pipe 20 has a first pipe portion 21 on the base end side that extends in the outer direction (substantially horizontal direction) of the first divided body 51, and is relatively movable and hermetically sealed to the first pipe portion 21. The second pipe part 25 on the free end side that is connected to the pipe and extends upward and has an open end part 28a. The second pipe part 25 is opened and closed to the open end part 28a. A valve 30 is connected. The on-off valve 30 is configured as a ball valve in this embodiment, and is used when the internal gas of the flow control device is diffused or when a bypass pipe (not shown) is configured using the flow control device. The internal valve body is opened, but in the process of this embodiment, the internal valve body of the on-off valve 30 is basically closed.

  The extension tube 20 will be described in detail in order from the proximal end side to the distal end side. First, the first tube portion 21 is directed outward from the substantially vertical wall portion of the first divided body 51 (substantially horizontal direction). And a side extension 22 extending upward and an upward extension 23 extending upward (substantially in the vertical direction) via the elbow part. Further, the second tube portion 25 includes a base end portion 29 that is pivotally connected to the distal end portion 24 of the upper extension portion 23 of the first tube portion 21 and is connected in a sealing manner, and an upward extension portion 26 that extends upward. A horizontal portion 27 as an extending portion extending in an approximately horizontal direction through the elbow portion to the upper extending portion 26, and an open end portion 28a extending upward in the horizontal portion 27 through the elbow portion. A straight pipe portion 28 is provided. The distal end portion 24 of the upper extension portion 23 of the first pipe portion 21 and the base end portion 29 of the upper extension portion 26 of the second pipe portion 25 constitute a joint portion of both the pipe portions 21 and 25. Yes.

  Therefore, the second pipe portion 25 is capable of relative rotation (relative movement) around the virtual axis line facing the vertical direction in the present embodiment at the joint portion with respect to the first pipe portion 21, and more specifically, The entire second tube portion 25 is located on the outer side of the periphery of the opening 50c of the housing 5 in plan view (hereinafter referred to as “outward position”), and the second tube portion 25 in plan view. In addition, at least a part of the opening / closing valve 30 can be relatively rotated to a position on the inner side of the peripheral edge of the opening 50c of the housing 5 (hereinafter referred to as “inward position”) in plan view. .

  Next, the joint part of the extension pipe 20 will be described with reference to FIG. First, the distal end portion 24 of the upper extending portion 23 of the first tube portion 21 is configured as an insertion portion of the joint portion, and the upward extending portion is directed toward the distal end opening 24c of the distal end portion 24 opened. 23 has a reduced diameter portion 24a having an outer surface whose diameter is smaller than that of the outer surface 23, and a small diameter portion 24b having an outer surface having a smaller diameter than that of the reduced diameter portion 24a. Next, the base end portion 29 of the upper extension portion 26 of the second pipe portion 25 is configured as a receiving portion of the joint portion. From the inner surface of the base end opening 29 c and the inner surface of the upper extension portion 26. Is also provided with a bulging portion 29a bulging in the inner diameter direction.

  In the state where the proximal end portion 29 of the second tube portion 25 is externally fitted to the distal end portion 24 of the first tube portion 21 configured as described above, a plurality of annular recesses 29b are formed on the inner surface of the bulging portion 29a. The O-rings 31 respectively accommodated in the first and second pipe parts 21 and 25 are pressed against the outer surface of the small-diameter part 24b, so that the joint state of the first pipe part 21 and the second pipe part 25 is maintained. Further, the retaining screw 32 screwed into the female thread portion of the distal end opening 24c of the distal end portion 24 is engaged with the end portion of the bulging portion 29a in the direction of the tube axis of the extended tube 20, so that the first The tube portion 21 and the second tube portion 25 are capable of relative rotation (relative movement) in the circumferential direction, and relative movement is restricted in the tube axis direction.

  Note that the reduced diameter portion 24a and the small diameter portion 24b constituting the distal end portion 24 of the first tube portion 21 and the bulging portion 29a constituting the proximal end portion 29 of the second tube portion 25 have an inner diameter By welding the deformed tubes having different outer diameters in an appropriate order, it can be easily and freely configured as a joint portion. More specifically, for example, first, the tubular body P having the bulging portion 29a is externally fitted to the distal end portion 24 having the distal end opening 24c of the first tube portion 21, and the retaining screw 32 is screwed into the distal end opening 24c. After joining, the 1st pipe part 21 and the 2nd pipe part 25 joint part can be comprised easily by welding the adjacent part R of the cylindrical body P and the pipe member Q. FIG.

  Next, as shown in FIG. 3, a test for confirming the pressure resistance and the sealed state of the casing 5 welded to the straight pipe 3 is performed. More specifically, the test lid 40 is hermetically attached to the mounting flange 50f of the housing 5 via the connection flange 33, and compressed from the gas cylinder 42 via the gas tube 41 connected to the through-hole penetrating the test lid 40. Gas is supplied into the housing 5 and the pressure gauge 43 confirms that the inside of the housing 5 reaches a predetermined pressure. After the test, the pressure in the housing 5 is released, and the test lid 40, the gas tube 41, and the gas cylinder 42 are removed. At this time, the second tube portion 25 is rotated relative to the first tube portion 21 and arranged at the outer position. At this time, it is good to fix with the sling belt etc. so that the 2nd pipe part 25 may stay in an outward position.

  Next, the pipe member cutting step will be described. As shown in FIGS. 5 and 6, the working valve includes a valve body 6 a that can close the opening 50 c via a connection flange 33 on a mounting flange 50 f provided at the upper end of the opening 50 c of the housing body 50. 6 and a cutting machine 7 as a cutting means is installed above the working valve 6. The pipe cutting device of the present embodiment is mainly composed of a housing 5 and a cutting machine 7.

  At this time, at least before the work valve 6 and the cutting machine 7 are attached, the second pipe part 25 is relatively rotated with respect to the first pipe part 21 and arranged at the outer position. At this time, it is good to fix with the sling belt etc. so that the 2nd pipe part 25 may stay in an outward position. By doing in this way, it can avoid that the working valve 6 and the cutting machine 7 attached to the housing | casing 5 interfere with the extension pipes 20 and 20 '. In addition, the 1st division | segmentation body 51 to which the said 2nd pipe part 25 was connected in the state which has previously arrange | positioned in the outward position in the 2nd pipe part 25 is attached to the straight pipe 3, and is connected to the 2nd division | segmentation body 52. You may do it. Further, immediately after the housing 5 is assembled to the straight pipe 3, the second pipe portion 25 may be rotated and arranged at the outward position.

  The cutting machine 7 mainly includes an attachment flange cylinder 71, a cutter 72 for cutting the pipe member 1, and a drive mechanism 78 for rotating the cutter 72 in the attachment flange cylinder 71. Note that the cutter 72 may be moved up and down in the vertical direction by the drive mechanism 78. The cutter 72 includes a hole saw 73 having a cutting blade at the lower end along the circumferential direction, and a center drill 74 that is disposed coaxially with the rotation axis of the hole saw 73 and projects further forward than the cutting blade. . The hole saw 73 of the cutter 72 has a circular shape that is concentric with the center drill 74 and the opening 50c of the housing 5, and is inserted into the housing 5 through the opening 50c and positioned near the bottom of the housing body 50. It is possible to proceed to.

  Next, as a specific cutting process of the pipe member 1 by the cutting machine 7, first, the valve body 6a inside the working valve 6 is retracted to open the opening 50c of the housing 5, and then shown in FIG. As described above, the cutter 72 of the cutting machine 7, that is, the center drill 74 and the hole saw 73 are rotated and moved downward to cut the straight pipe 3 constituting the pipe member 1 in an uninterrupted state.

  In this embodiment, the center drill 74 constituting the cutter 72 first drills a hole in the straight pipe 3 to position the cutter 72, and the tube wall of the straight pipe 3 is moved at a time by the progress of the hole saw 73. The straight pipe 3 is cut in the pipe axis direction.

  Further, a drain (not shown) capable of discharging fluid to the outside may be attached to the bottom of the casing body 50 together with a valve that can be opened and closed, and is generated when the pipe member 1 is cut by the cutter 72. The swarf to be discharged may be discharged together with the fluid.

  Although not particularly illustrated, when the pipe member 1 is cut by the cutter 72, the section of the straight pipe 3 separated from the pipe member 1 is penetrated and held in the hole saw 73 by the center drill 74. It becomes a state. When the cutter 72 is pulled up inside the mounting flange cylinder 71, the section in the hole saw 73 is locked to a lock pin (not shown) provided in the center drill 74, thereby following the center drill 74. Pulled up and carried out of the housing 5.

  By closing the opening 50c of the housing 5 with the valve body 6a inside the work valve 6, the excision work of the pipe member 1 is completed. In addition, the straight pipe 3 remaining in the housing 5 after the pipe member 1 is removed by the cutter 72 is integrally held while being surrounded by the housing 5 although it is divided. Although not particularly illustrated, the cutting machine 7 is removed while the opening 50c of the housing 5 is closed by the valve body 6a inside the work valve 6.

  Next, as shown in FIG. 7, the installation machine 8 is installed above the work valve 6 that closes the opening 50 c of the housing body 50 of the housing 5. The installation machine 8 includes a mounting flange cylinder 81, a valve suspension bracket 82 for supporting the fluid control 10 in the attachment flange cylinder 81, and a drive mechanism 83 for moving the valve suspension bracket up and down in the vertical direction. And mainly consists of.

  At this time, the second pipe portion 25 is rotated relative to the first pipe portion 21 so as to be disposed at the outer position, similarly to the case where the above-described cutting machine 7 is attached. By doing in this way, it can avoid that the installation machine 8 attached to the housing | casing 5 interferes with the extension pipe | tube 20. FIG.

  As shown in FIGS. 8 and 9, the fluid control system 10 of this embodiment includes a partition wall 11 having an opening, a valve body 13 that opens and closes the opening, an upper lid 12, and the valve body 13. The first sealing member S1 is attached to the partition wall 11 from the lower end to both sides, and the upper lid 12 has an outer periphery. An annular second seal member S2 is attached over the portion. The first seal member S1 and the second seal member S2 are made of an elastic member such as rubber, elastomer, or resin including NBR, SBR, and CR. Further, the fluid control 10 is not limited to a ball valve, and may be a gate valve, a butterfly valve, a plug, a switching valve, or the like.

  As the installation process of the fluid control 10 by the installation machine 8, first, the valve body 6 a inside the work valve 6 is retracted to open the opening 50 c of the housing 5, and then suspended by the valve hanging bracket 82 of the installation machine 8. The controlled fluid 10 is moved downward, and the controlled fluid 10 is inserted into a predetermined position in the housing 5. At this time, the valve body 13 of the fluid control 10 is inserted in an open state.

  The inner wall surface of the housing main body 50 may be formed with side wall steps that protrude inward of the housing main body 50 relative to other parts so as to face each other. When the fluid 10 is inserted into the housing 5, both side portions of the partition wall 11 of the control fluid 10 are guided by the side wall step portions, thereby preventing a shift in the insertion position of the control fluid 10.

  A bottom wall step 50 h is formed on the bottom inner wall surface of the housing 5, and an annular step 50 j is formed on the inner wall surface of the opening 50 c of the housing 5. Therefore, when the fluid control 10 is inserted into the casing 5 at a predetermined depth, the first seal member S1 attached from the lower end portion of the partition wall 11 of the fluid control 10 to both sides is provided with the bottom wall step 50h and The annular second seal member S2 that is press-fitted into the inner wall in a sealing manner and is attached to the outer periphery of the upper lid portion 12 of the fluid control 10 is pressed against the annular step 50j of the housing 5.

  As described above, the fluid control 10 is installed in the housing 5 so as to partition the cut surfaces of the divided straight pipes 3, thereby leaking fluid between the peripheral edge of the fluid control 10 and the housing 5. The flow path in the housing 5 can be opened or closed by opening and closing the valve body 13 of the fluid control 10.

  Next, as shown in FIG. 7, the O-ring plug 35 having a plurality of female screw holes 50g provided in the circumferential direction of the opening 50c of the housing 5 and previously closed in the radial direction is removed. Instead, a fixing presser screw 36 is screwed into the female screw hole 50g, and the presser screw 36 is advanced in the inner diameter direction of the opening 50c. As a result, the presser screw 36 is locked so as to press the upper cover 12 of the fluid control 10 from above, and the fluid control 10 is prevented from coming out of the opening 50 c of the housing 5. Thus, the installation machine 8 and the work valve 6 can be removed from the housing 5 by the presser screw 36 pressing the upper cover 12 of the fluid control 10 from above.

  Next, as shown in FIG. 8, for example, foaming liquid is attached to the contact portion between the outer peripheral portion of the upper lid portion 12 of the fluid control 10 and the inner peripheral portion of the opening portion 50 c of the housing 5, thereby Check for leakage of gas (fluid) in the housing 5. When the fluid in the pipe is a gas as in this embodiment, bubbles can be easily detected if there is even a slight gas leakage from the contact portion.

  Next, as shown in FIG. 9, the lid member 57 is fixed to the mounting flange 50 f of the housing 5 with the fixing bolt 58 so that the lid member 57 presses the fluid control 10. The anti-fluid 10 is prevented from coming out of the opening 50 c of the housing 5. The drive portion 18 of the valve body 13 is formed to protrude from the central gap portion of the lid member 57. Thereafter, the presser screw 36 is removed, and the female screw hole 50g is closed by the O-ring plug 35 described above instead. When the internal fluid is a gas as in this embodiment, it is preferable that the outer surface of the plug 35 with an O-ring is covered with a steel plate 37 and welded as shown in FIG. 11, and the lid member 57 is attached to the mounting flange 50f. It is preferable to weld to.

  Next, as shown in FIG. 9 and FIG. 10, the second pipe portion 25 is rotated relative to the first pipe portion 21 and arranged at the inward position. In the present embodiment, substantially the entire straight pipe portion 28 and the on-off valve 30 of the second pipe portion 25 are disposed in the inward position in plan view. Note that immediately after the installation machine 8 and the work valve 6 are removed from the housing 5, the second pipe portion 25 may be rotated and disposed at the inward position.

  Thus, the second pipe part 25 has a horizontal part 27 (extension part) extending sideways, and is connected to the first pipe part 21 so as to be relatively rotatable, The amount of movement with the first tube portion 21 can be easily set according to the amount of rotation of the second tube portion 25 without changing the extension dimension of the extension tubes 20 and 20 ′.

  Further, at this inward position, the joint portion of the first tube portion 21 and the second tube portion 25, that is, the distal end portion 24 of the first tube portion 21 and the proximal end portion 29 of the second tube portion 25 are connected. It is fixed and the relative rotation in the circumferential direction is restricted. When the internal fluid is a gas as in this embodiment, it is preferable to weld and fix the connecting portion between the distal end portion 24 and the proximal end portion 29 in the circumferential direction.

  Further, the bottom portion of the bracket 45 formed in a substantially L shape in a side view is connected and fixed to the upper surface of the lid member 57 with a bolt 47, and the straight pipe portion of the second pipe portion 25 is connected to the upper end portion of the bracket 45. 28 is connected and fixed by a U-bolt 46. That is, the bracket 45, the U-shaped bolt 46, and the bolt 47 constitute a support member 39. By doing in this way, the 2nd pipe part 25 which comprises the free end side of the extension pipes 20 and 20 'extended from the housing | casing 5 above the front-end | tip can be supported and stabilized by the support member 39. it can.

  Next, as shown in FIGS. 11 and 12, a part of the excavation portion required for installing the flow control device is backfilled as necessary to form a small-diameter vertical hole, and the upper portion of the flow control device is In the vicinity of the ground surface, a substantially cylindrical valve casing 48 constituting a human hole whose upper and lower ends are open is disposed. Inside the valve casing 48, the open ends 28a and 28a of the extension pipes 20 and 20 ', the open / close valves 30 and 30, and the extended drive unit 19 connected to extend above the drive unit 18 are arranged. Has been. The inside of the valve casing 48 is closed by arranging a manhole cover 49 flush with the ground surface at the upper end of the valve casing 48.

  Thereby, the installation of the flow control device in the housing 5 is completed. In addition, it goes without saying that lids are attached to all windows, penetrating parts, working holes, etc. in a sealed manner when cutting in an uninterrupted flow state or installing valves.

  Thus, by arranging the extension pipes 20 and 20 ′ in the inward position, the open ends 28 a of the extension pipes 20 and 20 ′ and the open / close valves 30 and 30 together with the extension drive part 19 are covered with the human hole lid 49. Is disposed above the casing 5 in the valve casing 48 that is closed by the valve casing 48, so that the casing 5 and the open end portions 28 a of the extension pipes 20 and 20 ′ can be integrated into the valve casing 48. It is possible to improve workability and management in operating the flow device, and to achieve cost reduction.

  Further, the open / close valves 30 and 30 provided on the open end 28a of the second pipe portion 25 on the free end side of the extension pipes 20 and 20 ′ and disposed above the housing 5 are easily opened and closed. be able to.

  According to the current control device of the present invention described above, the second pipe part 25 constituting the extension pipes 20 and 20 ′ is moved relative to the first pipe part 21 in a sealed state, thereby allowing the housing 5 When the straight pipe 3 is cut and the control fluid 10 is installed, interference with the extension pipes 20 and 20 'can be avoided, and the control fluid 10 is installed in the housing 5 to control the current control device. When configured, the distal ends of the extension tubes 20 and 20 ′ can be arranged above the housing 5.

  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, in the above-described embodiment, after the fluid control 10 is installed in the housing 5, the fixing presser screw 36 screwed into the opening 50 c is advanced in the inner diameter direction. Although the upper lid 12 is locked so as to be pressed from above, as an example of a modification in which the fluid control 10 is temporarily fixed in addition to the presser screw 36, as shown in FIG. A temporary fixing bolt 38 may be screwed into a female screw hole penetrating in a radial direction through a connection flange 33 arranged between the working valve 6 and the working valve 6.

  According to this, as shown in FIG. 13B, after the fluid control 10 is installed by the valve suspension fitting 82 of the installation machine 8, first, the temporary fixing bolt 38 is advanced in the inner diameter direction, and the valve suspension fitting 82 or By pressing the interposition member 84 arranged at the lower end downward, the fluid control 10 can be pushed in advance to a predetermined installation depth, and therefore, after the temporary fixing bolt 38 has been advanced, it is shown in FIG. As described above, when the presser screw 36 is advanced, it is possible to avoid a possibility that the upper surface of the upper lid portion 12 is excessively slid and damaged by the presser screw 36. As shown in FIG. 13 (d), with the holding screw 36 pressing the upper cover 12 of the fluid control 10 from above, the temporary fixing bolt 38 is retracted in the outer diameter direction, thereby The bracket 82 and the like can be removed.

  In addition, for example, in the above-described embodiment, after installing the current control device, the joint portion of the first pipe portion 21 and the second pipe portion 25 of the extension pipe 20 is welded and fixed, so that the relative movement in the circumferential direction is performed. Although not limited to this, as shown in FIG. 14 as a first modified example, the outer peripheral surface of the distal end portion 24 of the first tube portion 21 and the proximal end portion 29 of the second tube portion 25. A circumferentially divided locking ring 60 formed so as to straddle the outer peripheral surface of the outer peripheral surface is attached by a mounting member 61 via a packing material 62 so as to restrict relative movement in the circumferential direction. Good. Further, the locking ring 60 may be used to fix the second pipe portion 25 so as to remain in the outward position when the fluid pipe is cut or when the fluid control is installed.

  As a second modified example, as shown in FIG. 15, the enlarged diameter portion 24 d is formed on the outer peripheral surface of the distal end portion 24 of the first tube portion 21, and the proximal end portion 29 of the second tube portion 25 is formed. An enlarged diameter portion 29d having substantially the same diameter is formed on the outer peripheral surface of the outer peripheral surface, and a locking ring 65 having a split structure is formed in the circumferential direction formed in a substantially U shape in cross section so as to straddle these enlarged diameter portions 24d and 29d. The relative movement in the circumferential direction may be restricted by attaching with the attachment member 61.

  More specifically, slit-shaped notches 24e and 29e are recessed in the pipe axis direction at the same position in the circumferential direction on the outer peripheral surfaces of these enlarged diameter portions 24d and 29d. A protrusion 66 having a shape that is complementary to or slightly smaller than the cutouts 24e and 29e is protruded in the inner diameter direction on the peripheral surface. In the state where the first ring portion 21 and the second tube portion 25 are inserted, the relative movement in the circumferential direction of the first tube portion 21 and the second tube portion 25 is restricted.

  By doing in this way, the relative movement of these circumferential directions can be easily controlled, without taking the effort which welds the 1st pipe part 21 and the 2nd pipe part 25. FIG. Furthermore, after slightly allowing relative movement in the circumferential direction of the first tube portion 21 and the second tube portion 25 by slightly engaging the notches 24e and 29e and the protrusion 66 in a loosely fitted state. Can be regulated.

  In addition to the above-described modification, for example, by forming a protruding portion on the outer peripheral surface of the enlarged diameter portions 24d and 29d and providing a notch portion that complements the protruding portion on the inner peripheral surface of the locking ring 65, You may make it regulate the relative movement of the 1st pipe part 21 and the 2nd pipe part 25 of the circumferential direction.

  Moreover, in the said Example, although the extension pipes 20 and 20 'are bilaterally symmetrical and has the same structure, it is not restricted to this, Asymmetrical may be sufficient and a mutually different structure may be sufficient.

  Moreover, in the said Example, when the extension pipes 20 and 20 'attach the housing | casing 5 to the straight pipe 3 (fluid pipe), the 1st pipe part 21 and the 2nd pipe part 25 are attached. However, the present invention is not limited to this. For example, after attaching the casing 5 having only a part of the first pipe portion 21 to the fluid pipe, the pipe portion corresponding to the second pipe portion 25 is attached by welding or the like. For example, after attaching the housing 5 having only the first pipe portion 21 to which a gate valve such as a ball valve is attached to the fluid pipe, after cutting the fluid pipe or after installing the fluid control 10, The second pipe part 25 may be connected to the first pipe part 21.

1 Pipeline member 3 Straight pipe (fluid pipe)
5 Housing 6 Work valve 7 Cutting machine 8 Installation machine 10 Fluid control 11 Partition wall 12 Upper lid part 13 Valve body 18 Driving part 20, 20 'Extension pipe 21 First pipe part 22 Side extension part 23 Extension part 24 Tip Part 25 Second pipe part 26 Upper extension part 27 Horizontal part (extension part)
28 Straight pipe portion 28a Open end portion 29 Base end portion 30 On-off valve 33 Connection flange 36 Presser screw 38 Temporary fixing bolt 39 Support member 50 Housing body 50c Opening portion 50f Mounting flange 51 First divided body (divided housing)
52 Second division (divided housing)
72 Cutter 78 Drive Mechanism 82 Valve Suspension Fitting 83 Drive Mechanism

Claims (6)

A flow control device comprising at least a housing of a split structure that externally fits a fluid pipe, and a fluid control device installed in the housing where the fluid pipe is cut in an uninterrupted state;
The divided casing constituting the casing is connected to the first pipe portion extending laterally from the divided casing and the first pipe portion so as to be relatively movable and hermetically sealed. A flow control device comprising: a second pipe portion extending above the body; and an extended pipe configured at least from the second pipe portion.   The said 2nd pipe part is equipped with the on-off valve in the open end part, The current control apparatus of Claim 1 characterized by the above-mentioned.   The said 2nd pipe part has the extension part extended to the side, and is connected to the said 1st pipe part so that relative rotation is possible, The said 1 or 2 characterized by the above-mentioned. Current control device.   4. The flow control device according to claim 1, wherein at least a part of the second pipe portion on an open end side is disposed vertically above the casing. 5.   5. The flow control device according to claim 1, wherein the housing includes a support member that supports the second pipe portion. 6. A flow control device comprising at least a housing having a split structure that externally fits a fluid pipe, and a fluid control device installed in the housing from which the fluid pipe has been cut,
The split casing constituting the casing is connected to the first pipe portion extending laterally from the split casing and the first pipe portion in a sealed manner, and extends above the split casing. A second pipe part to be taken out, and at least a part of the second pipe part on the open end side is arranged vertically above the casing. Characteristic flow control device.

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