JP6937221B2 - Flow control device - Google Patents

Description

The present invention relates to a flow control device in which a fluid control fluid is installed in a housing that seals a fluid pipe in a continuous flow state.

When arranging a control fluid such as a valve or a plug in a fluid pipeline, it is common practice to cut a part of the fluid pipe constituting the fluid pipeline and install the control fluid at the cut portion. ing. For example, as shown in Patent Document 1, a housing is attached to a fluid pipe in a sealed manner, a work valve that can open and close the inside of the housing is attached to the opening of the housing, and a hole saw and a drive unit are attached to the work valve. A cutting machine is installed, and the hole saw is advanced by the drive unit with the work valve open to cut a part of the fluid pipe in a non-disruptive state in the housing, and the insertion machine is used instead of the cutting machine. There is known a flow control device configured by installing a control fluid in a housing in a continuous flow state through an opening by advancing the control fluid by an insertion machine.

Further, the control fluid shown in Patent Document 1 is provided in the main body portion which is arranged so as to partition the inside of the housing and controls the flow path in the housing, the lid portion which closes the opening of the housing, and the main body portion. It includes a first sealing member that seals the inner wall surface of the housing, and a second sealing member that is provided on the lid and seals the inner wall surface of the opening of the housing. The lower end surface of the main body of the control fluid has an inclined surface that slides along the inclined inner wall surface formed on the bottom surface of the housing, and the controlling fluid configured in this way is installed in the housing. At this time, the fluid control fluid is installed in the housing by operating the pulling bolt screwed to the lower end of the housing to pull the fluid control fluid toward the bottom surface side of the housing.

Japanese Unexamined Patent Publication No. 2006-132715 (page 14, FIG. 22)

However, in the installation of the control fluid as in Patent Document 1, the control fluid attracted to the bottom surface side of the housing by the pulling bolt gradually slides in the inclined direction along the inclined surface of the bottom surface of the housing. That is, since the structure is such that the inclination of the control fluid is adjusted in synchronization with the adjustment of the vertical position of the control fluid, the inclination of the control fluid is adjusted so that the first seal portion and the inner wall surface of the housing are connected to each other. When the alignment is performed, the insertion depth of the entire control fluid changes, and there is a risk that the second seal portion and the inner wall surface of the opening cannot be properly aligned.

The present invention has been made by paying attention to such a problem, and an object of the present invention is to provide a flow control device capable of exhibiting a desired sealing property by the first sealing portion and the second sealing portion.

In order to solve the above problems, the flow control device of the present invention is used.
The main body that controls the flow path in the housing that is hermetically attached to the fluid pipe, the lid that closes the opening of the housing, and the inner wall surface of the housing that is provided in the main body are sealed. A flow control fluid having a first seal portion and a second seal portion provided on the lid body portion for sealing the inner wall surface of the opening portion is inserted into the housing in a continuous flow state and installed. It ’s a device,
A fitting portion is provided on the tip end side in the insertion direction of the main body portion, and the fitting portion is fitted to the inner bottom portion of the housing with the control fluid inserted into the housing. The part is provided,
A position adjusting portion for adjusting the inclination of the control fluid with respect to the housing is provided between the fitting portion and the fitted portion.
According to this feature, at the insertion depth of the control fluid in a state where the fitting part of the main body is fitted to the fitted part in the housing, the position adjustment part controls the fluid without affecting the insertion depth. Since the inclination of the fluid can be adjusted so that it can be aligned with the housing, the sealing performance of the fluid control fluid installed in the housing can be stably improved.

The position adjusting portion is characterized in that the inclination of the controlling fluid is adjusted with the second sealing portion that seals the inner wall surface of the opening in a state where the controlling fluid is inserted into the housing as a fulcrum. There is.
According to this feature, when the inclination of the control fluid is adjusted, the second seal portion, which is a fulcrum of the inclination adjustment, hardly moves, so that the sealing property can be maintained even if the inclination is adjusted.

The position adjusting portion is characterized in that it is provided on the fitted portion and includes a pressing portion that presses the fitting portion of the main body portion in the direction of the pipe axis of the fluid pipe.
According to this feature, since the control fluid can press the fitting portion in the direction of the pipe axis, which is most susceptible to the influence of the fluid in the pipe, the inclination can be adjusted with high accuracy.

The pressing portion is characterized by having a rotation prevention portion that prevents the fitting portion from rotating by pressing the fitting portion.
According to this feature, it is possible to prevent the control fluid from rotating with the position adjustment of the control fluid.

It is characterized in that a flat seal seat surface is formed on the inner bottom portion of the housing so as to be connected to the fitted portion and in close contact with the first seal portion.
According to this feature, not only the position of the first seal portion of the main body portion can be easily adjusted while sliding on the flat seal seat surface, but also the sealability can be maintained without twisting or the like in the seal material.

The fitted portion is provided with a drain portion that can open and close the inside of the housing.
According to this feature, the sealing performance of the position-adjusted control fluid can be confirmed by opening the drain portion.

It is a side sectional view which shows the state of attaching the work valve to the fluid pipe in an Example. It is a side sectional view which shows the state of attaching the mounting flange cylinder, the cutter and the lid body in the process of installing a cutting machine. It is a side sectional view which shows the state which connected the shaft member and a cutter in the process of installing a cutting machine. It is a side sectional view which shows the state of cutting a fluid tube by a cutting machine. It is a side sectional view which shows the state which the partition wall, the opening / closing shaft and the valve body in a butterfly valve are attached to a cylindrical member. (A) is a cross-sectional view taken along the line AA of FIG. 5, and FIG. 5B is a cross-sectional view taken along the line BB of FIG. (A) is a top view of the partition wall, (b) is a front view, (c) is a side view, and (d) is a bottom view. (A) is a top view of the first seal member, (b) is a front view, and (c) is a bottom view. (A) is a front view of the third seal member, and (b) is a top view. It is a side sectional view which shows the appearance that the butterfly valve was constructed with the upper lid part attached. (A) is a top view of the upper lid portion, (b) is a side view, and (c) is a front view. (A) is a top view of the second seal member, (b) is a front view, (c) is a side view of the connecting portion, and (d) is a view of the connecting portion viewed from below. (A) is a schematic view showing a state before assembling the upper lid part into a partition wall, and (b) is a schematic view showing a state where the upper lid part is assembled into a partition wall. It is a side sectional view which shows the state of connecting a shaft member and a valve hanging metal fitting. It is a side sectional view which shows the state which the butterfly valve is inserted in the housing. It is a side sectional view which shows the state which the inclination of the butterfly valve with respect to a housing is adjusted. FIG. 16 is a cross-sectional view taken along the line CC of FIG. It is explanatory drawing which shows the position adjustment part in the modification 1. FIG. It is explanatory drawing which shows the position adjustment part in modification 2. It is explanatory drawing which shows the control fluid in the modification 3. It is explanatory drawing which shows the mounting procedure of the drive mechanism in the modification 4.

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

In the embodiment, a predetermined portion of the existing fluid pipe 1 constituting the flow path component is cut in the housing 2, and a butterfly valve 10 (fluid control) is installed at the cut portion in a continuous flow state to control the flow. A series of flows up to the configuration of the flow device will be described with reference to FIGS. 1 to 17. Here, the flow control device of this embodiment is mainly composed of the butterfly valve 10 (control fluid) and the housing 2.

As shown in FIG. 1, the periphery of a predetermined portion of the fluid pipe 1 buried in the ground is excavated, and the housing 2 having a two-divided structure having a branch portion 2a (opening) that opens upward is sealed. Surround. The fluid in the fluid pipe 1 may be, for example, clean water, industrial water, sewage, or the like, or a gas or a gas-liquid mixture of a gas and a liquid. Furthermore, although the housing 2 has a two-divided structure in this embodiment, it may have another plurality of divided structures, and the divided housings may be joined by welding or bolting via packing. ..

The fluid pipe 1 is a ductile cast iron pipe, and is formed in a substantially circular shape in cross section. The fluid pipe according to the present invention may be made of other metal 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.

Further, when the housing 2 is attached to the fluid pipe 1 in a sealed manner, concrete foundations 9 and 9 are formed below the housing 2 to support the weight around the housing 2 and to prevent the fluid pipe 1 from bending or the like. To prevent. As long as the weight of the housing 2, the cutting machine 5 and the butterfly valve 10 described later can be supported, the concrete foundations 9 and 9 are not limited, and a jack or the like may be used.

Next, a step of attaching the work valve 4 capable of closing the opening of the branch portion 2a to the branch portion 2a (opening portion) of the housing 2 will be described. First, as shown in FIG. 1, the valve box 41 constituting the work valve 4 is suspended from above by a hanging tool C having a hook and suspended by a crane (not shown) and a wire W, and the flange of the branch portion 2a is suspended. It is placed on 2b, and the flange 2b and the valve box 41 are fixed with bolts and nuts (not shown) while adjusting the position of the valve box 41 on the flange 2b. The crane used in this embodiment is preferably, for example, a mobile rough terrain crane. Needless to say, the crane is increased in size according to its lifting capacity, and the heaviest member among the members described later is lifted. Possible specifications are selected while considering the permissible lifting load at the turning radius. Further, the installation area of the crane, including the outriggers and the like, often requires a larger area than the excavation area of the fluid pipe 1.

The valve box 41 has a substantially cylindrical shape penetrating in the vertical direction, and a slide groove 41b extending in a substantially horizontal direction is formed from an opening 41a provided on one side thereof, and is formed on the back side of the slide groove 41b. A valve seat portion 41c is formed (on the side opposite to the opening 41a). Since an O-ring (not shown) is pressure-welded between the flange 2b and the valve box 41, the branch portion 2a and the valve box 41 are connected in a sealed manner.

Next, the valve body 42, the valve lid 43, and the valve rod 44 constituting the working valve 4 are suspended by the suspending tool C and the wire W in a unitized state, and lowered to the side of the opening 41a of the valve box 41. .. Then, in this suspended state, the valve lid 43 is fixed to the side of the valve box 41 with bolts and nuts (see FIG. 2).

Further, since the packing (not shown) is pressure-welded between the valve lid 43 and the valve box 41 in the circumferential direction, the sealing property between the valve lid 43 and the valve box 41 can be ensured. The packing may be press-fitted into the concave groove provided on the valve lid 43 side, or may be press-fitted into the concave groove provided on the valve box 41 side.

In this embodiment, the valve lid 43 and the valve box 41 are fixed by bolts and nuts, but the present invention is not limited to this, and the valve lid 43 and the valve box 41 may be fixed by another fixing means such as a vise. , May be fixed by welding or the like.

Next, a step of installing a cutting machine 5 for cutting the fluid pipe 1 above the working valve 4 will be described. As shown in FIG. 2, first, the mounting flange cylinder 51 penetrating in the vertical direction is suspended by the hanging tool C and the wire W and lowered to the upper part of the valve box 41, and the mounting flange cylinder 51 is above the valve box 41. Is fixed with bolts and nuts (not shown). Further, since an O-ring (not shown) is pressure-welded between the mounting flange cylinder 51 and the valve box 41, the valve box 41 and the mounting flange cylinder 51 are connected in a sealed manner.

Next, the cutter 52 is temporarily installed on the mounting flange cylinder 51. Specifically, with the lid 53 of the mounting flange cylinder 51 connected above the cutter 52, the lid 53 is suspended by the hanging tool C and the wire W and lowered to above the mounting flange cylinder 51. The cutter 52 is composed of a cylindrical member 52a having a cutting blade at the peripheral end and a center drill 52b coaxially arranged on the cylindrical member 52a and protruding toward the front of the drilling blade, and the cylindrical member 52a and the center drill 52b. Is fixed. Further, above the cylindrical member 52a and the center drill 52b, an adapter 54 having an annular protrusion 54a formed at the upper end thereof is attached so as not to rotate relative to each other.

Further, the lid 53 is formed with a through hole 53a penetrating in the vertical direction at the center thereof, and the adapter 54 is inserted through the through hole 53a. Further, the lid 53 is formed with a plurality of recesses 53b recessed in the outer radial direction from the inner peripheral surface of the through hole 53a in the circumferential direction, and the recess 53b can advance and retreat in the radial direction of the through hole 53a. A fixing jig 55 is arranged. The cutter 52 and the lid 53 are integrated by the fixing jig 55 projecting in the inner diameter direction of the through hole 53a and engaging with the lower surface of the annular protrusion 54a of the adapter 54.

Next, the lid 53 is placed above the mounting flange cylinder 51, and in this state, the mounting flange cylinder 51 and the lid 53 are aligned and fixed with bolts and nuts (not shown). At this time, the cutter 52 is housed inside the mounting flange cylinder 51.

Further, since the packing (not shown) is pressure-welded between the mounting flange cylinder 51 and the lid 53 in the circumferential direction, the sealing property between the mounting flange cylinder 51 and the lid 53 can be ensured. The packing may be press-fitted into the concave groove provided on the lid 53 side, or may be press-fitted into the concave groove provided on the mounting flange cylinder 51 side.

Next, the drive mechanism 8 (drive unit) of the cutting machine 5 is connected to the cutter 52. First, the structure of the drive mechanism 8 will be described.

As shown in FIG. 3, the drive mechanism 8 moves the shaft member 81, the gripping member 82 capable of gripping or releasing the shaft member 81, and the gripping member 82 in the axial range of the shaft member 81. It is mainly composed of an advancing / retreating member 83, a regulating member 84 capable of restricting or deregulating the shaft member 81 at a position below the advancing / retreating member 83, and a base member 85 to which the advancing / retreating member 83 and the restricting member 84 are attached. ing.

The base member 85 is provided with a plurality of support columns that are erected upward, and the advancing / retreating member 83 is attached so as to be slidable in the vertical direction along the support columns. That is, the shaft member 81 can be slid in the vertical direction by gripping the shaft member 81 by the gripping member 82 and moving the advancing / retreating member 83 along the strut portion in that state.

Further, below the base member 85, a tubular case portion 86 through which the shaft member 81 can be inserted is provided. An extending piece portion 86a extending in a substantially horizontal direction is formed on the lower end edge of the case portion 86.

Further, a rotary motor 87 is fixedly attached to a part of the advancing / retreating member 83, and the shaft member 81 is subjected to a rotational force by applying a rotational force to the grip member 82 in a state where the shaft member 81 is gripped by the rotary motor 87. The rotation can be transmitted, and the cutter 52 can be rotated by rotating the shaft member 81. By preparing a plurality of shaft members 81, they can be added in the axial direction to increase the length in the axial direction, and the weight and height can be reduced due to such a added structure. ..

When the drive mechanism 8 configured in this way is connected to the cutter 52, a plurality of support mechanisms 7 are arranged in the circumferential direction of the lower flange 53d of the lid 53, and the shaft member 81 is moved downward by a predetermined length in advance. The lower end of the shaft member 81 is projected downward from the case portion 86, the drive mechanism 8 is suspended by the hanging tool C and the wire W, and the extension piece portion 86a of the case portion 86 is placed on the support mechanism 7. Place on. Next, the operator accesses from the gap between the case portion 86 formed by the support mechanism 7 and the upper flange 53c of the lid 53, and connects the shaft member 81 and the adapter 54 with bolts and nuts N1. Then, the fixing jig 55 is retracted into the recess 53b. Here, the extending piece portion 86a is not always necessary, and for example, a support mechanism may be placed between the lower flange 53d and the drive mechanism 8. Further, it may be placed on the ground instead of the lower flange 53d.

The support mechanism 7 is configured such that the rod portion 71 moves up and down with respect to the cylindrical base portion 72 having high structural strength, and the base portion 72 is lower than the upper flange 53c of the lid 53. The upper end is arranged at the position. Here, the support mechanism is not limited to the support mechanism 7 described above, and for example, a hydraulic jack or other jack may be used, or a spacer may be used.

Subsequently, the drive mechanism 8 is lowered by retracting the rod portion 71 into the base portion 72, and the case portion 86 is placed on the upper flange 53c of the lid 53, and the case portion 86 and the lid are placed by bolts and nuts (not shown). Fix the body 53. As a result, the cutting machine 5 is configured by the mounting flange cylinder 51, the cutter 52, the lid 53, the adapter 54, and the drive mechanism 8, and the cutting device is configured by the housing 2, the work valve 4, and the cutting machine 5. At this time, it goes without saying that the center drill 52b is adjusted so as not to come into contact with the valve body 42.

Since the upper end portion of the base portion 72 is arranged at a position lower than the upper flange 53c of the lid body 53, the base portion 72 is supported when the case portion 86 is placed on the upper flange 53c of the lid body 53. The weight of the drive mechanism 8 is not applied to the mechanism 7, and the support mechanism 7 can be easily removed. In this embodiment, the mode in which the drive mechanism 8 is lowered by the support mechanism 7 is illustrated, but in order to improve safety, the drive mechanism 8 is lowered by the support mechanism 7 while being loosely suspended by the crane C and the wire W. The drive mechanism 8 may be lowered by a crane without using the support mechanism 7. By doing so, the load applied to the crane can be reduced and the load on the crane can be reduced.

Further, when the case portion 86 and the lid 53 are fixed, the packing (not shown) is pressed against the case portion 86 and the upper flange 53c of the lid 53, so that the case portion 86 and the lid 53 are in contact with each other. It is possible to secure the sealing property between them. The packing may be press-fitted into the annular groove formed on the lower surface of the case portion 86, or may be press-fitted into the annular groove provided on the upper flange 53c side of the lid 53.

Next, as shown in FIG. 4, the valve body 42 of the working valve 4 is retracted to open the branch portion 2a, and the cutter 52 advances while connecting the shaft member 81'using the cutting machine 5 described above. The fluid pipe 1 is cut in a continuous flow state while allowing the flow. At this time, it is not always the case that another shaft member 81'is connected, and the cutting may be completed by using the shaft member 81 having a predetermined length in advance.

A recess 2e (fitted portion) is formed in the bottom of the housing 2 so as to be recessed downward, and when the fluid pipe 1 is cut by the cutter 52, it is below the lower end of the cylindrical member 52a. Since the center drill 52b protruding into the recess 2e is housed in the recess 2e in a separated state, it is possible to prevent the center drill 52b from unexpectedly damaging the housing 2.

Furthermore, since the bottom plate 2f (see FIG. 17) of the recess 2e is attached with a valve capable of opening and closing a drain 15 capable of discharging the fluid to the outside, a cut generated when the fluid pipe 1 is cut by the cutter 52. The powder can be discharged to the outside together with the fluid. Further, since the bottom plate 2f is removable from the housing 2, maintenance in the recess 2e is easy.

Further, although not shown, when the fluid pipe 1 is cut by the cutter 52, the section formed by cutting the fluid pipe 1 is held in the cutter 52. Then, the cutter 52 is pulled up together with the section into the inside of the mounting flange cylinder 51, and the branch portion 2a is closed by the valve body 42 of the work valve 4, so that the cutting work of the fluid pipe 1 is completed.

Although not particularly shown, the drive mechanism 8 is first removed from the lid 53 while the branch portion 2a is closed by the valve body 42 of the work valve 4, and the lid 53 and the cutter 52 are attached together with the section flange cylinder. By removing from 51 and removing the mounting flange cylinder 51 from the work valve 4, the removal work of the cutting machine 5 is completed. In this way, since each member constituting the cutting machine 5 can be separately transported by the crane, the load on the crane at the time of removing the cutting machine 5 can be reduced.

Next, a step of installing the butterfly valve 10 in a non-interrupted state at a position where the fluid pipe 1 is cut will be described. As shown in FIG. 5, first, while the branch portion 2a is closed by the valve body 42 of the work valve 4, the cylindrical member 61 penetrating in the vertical direction is suspended by the suspender C and the wire W to support the work valve. It is lowered to the upper part of No. 4, and the cylindrical member 61 is fixed above the work valve 4 with bolts and nuts (not shown). Further, since an O-ring (not shown) is pressure-welded between the cylindrical member 61 and the working valve 4 (valve box 41), the cylindrical member 61 and the working valve 4 are connected in a sealed manner.

Next, the butterfly valve 10 is temporarily installed on the cylindrical member 61. As shown in FIG. 5, when the butterfly valve 10 is temporarily installed on the cylindrical member 61, first, the partition wall 11, the opening / closing shaft 12, and the valve body 13 constituting the main body of the butterfly valve 10 are integrated. The partition wall 11, the opening / closing shaft 12, and the valve body 13 are held by the cylindrical member 61 by being suspended by the hanging tool C and the wire W and lowered to a position where they are accommodated in the cylindrical member 61. At this time, the valve body 13 is arranged so as to be substantially parallel to the pipe axis direction (a state in which the opening of the partition wall 11 is opened).

Specifically, as shown in FIG. 6, four penetrating portions 61a penetrating the cylindrical member 61 so as to be orthogonal to the axial direction are arranged at four positions in the circumferential direction on the upper portion of the cylindrical member 61. Of the penetrating portions 61a, the locking members 62 and 62 are inserted into the penetrating portions 61a'and 61a' facing the direction orthogonal to the pipe axis X of the fluid pipe 1 (see FIG. 6A). The locking members 62 and 62 have a fitting portion 62a having a substantially U-shape in a plan view at the tip in the insertion direction, and have a notch portion 62b at the upper end of the fitting portion 62a. 62a fits the side end portion of the partition wall 11 outward, and is locked on the notch 62b with the protrusion 11n projecting laterally on the upper portion of the partition wall 11 mounted. , The partition wall 11, the opening / closing shaft 12, and the valve body 13 are held by the cylindrical member 61. In this way, since the locking members 62 and 62 are inserted into the penetrating portions 61a'and 61a' near the partition wall 11 extending in the direction orthogonal to the pipe axis X of the fluid pipe 1, the locking members 62 and 62 The extension of the can be shortened and the load bearing capacity can be improved. Further, on the opposite side of the fitting portion 62a of the locking member 62, there is a convex portion protruding upward, which serves as an index for determining the position of the main body portion and is brought into contact with the end portion of the penetrating portion 61a to further improve the load bearing capacity. I'm raising it. The locking member 62 is preferably driven by, for example, a hydraulic jack or a screw mechanism jig, and is preferably driven by taking a reaction force on the penetrating portion 61a.

As shown in FIG. 7, the partition wall 11 has an opening 11a provided in a substantially central portion, an upward convex portion 11b having a through hole 11d into which an opening / closing shaft 12 can be inserted from the upper portion toward the opening 11a, and a valve. A downward convex portion 11c (fitting portion) having a hole into which a shaft portion 13a (see FIG. 17) provided below the body 13 can be inserted and a downward convex portion 11c (fitting portion) projecting laterally from both side surfaces of the partition wall 11 and extending in the vertical direction. The side ridges 11e and 11e and the lower ridges 11f that are continuous with the side ridges 11e and 11e and project downward from the bottom surface of the partition wall 11 are provided.

The lateral ridges 11e and 11e are formed with concave grooves 11g and 11g along the longitudinal direction. A recess 11j into which the connecting portion 24 of the first seal member S1, which will be described later, can be fitted is formed in the upper end portions of the lateral ridge portions 11e and 11e. The above-mentioned protrusions 11n are provided at positions that sandwich the side protrusions 11e back and forth. Further, the lower ridge portion 11f has a large central portion so as to surround the lower convex portion 11c, and the annular portion surrounding the lower convex portion 11c in the central portion and the lateral portion of the annular portion. A groove portion 11h composed of a portion continuous with the groove portions 11g and 11g is formed.

Further, on the upper surface of the partition wall 11, a plurality of screw holes 11k for connecting the upper lid portion 14 constituting the lid portion of the butterfly valve 10 and a region in which the plurality of screw holes 11k are formed are formed so as to surround the region. A groove portion 11 m is provided. The screw hole 11k is formed over a peripheral portion of the upward convex portion 11b on the upper surface of the partition wall 11 and a lateral portion extending from the peripheral portion of the upward convex portion 11b to both sides. A third seal member S3, which will be described later, is attached to the groove portion 11 m.

Next, the structure of the first seal member S1 will be described. As shown in FIG. 8, the first sealing member S1 is composed of an elastic member such as rubber, elastomer, or resin containing NBR, SBR, and CR, and has an annular portion 21 through which the downward convex portion 11c can be inserted. The first side portions 22, 22 extending laterally from the annular portion 21, the second side portions 23, 23 extending upward from the lateral ends of the first side portions 22, 22 and facing each other from the second side portions 23, 23. It is provided with connecting portions 24, 24 that bulge in the direction (inward). The second side portions 23, 23 are tapered so as to gradually approach each other downward. Further, the connecting portion 24 has a recess 24A formed on the upper surface side, and the side wall of the recess 24A is formed on a tapered surface so as to taper downward, forming a substantially trapezoidal shape in cross section. The side walls may be on both sides or on one side, and in the case of one side, the cross-sectional view is substantially L-shaped.

The annular portion 21 is press-fitted into the annular portion surrounding the downward convex portion 11c in the groove portion 11h of the partition wall 11, and the first side portions 22 and 22 are continuous from the side of the annular portion in the groove portion 11h to the groove portions 11g and 11g. It is designed to be press-fitted into the part to be pressed. The second side portions 23, 23 are press-fitted into the groove portions 11g, 11g of the partition wall 11, and the connection portions 24, 24 are press-fitted into the recesses 11j, 11j provided at the upper ends of the side ridge portions 11e, 11e. It has become like.

In this embodiment, the annular portion 21, the first side portions 22, 22, the second side portions 23, 23, and the connecting portions 24, 24 in the first seal member S1 are the groove portion 11h and the groove portion 11g in the partition wall 11. The form of being press-fitted into 11 g and the recesses 11j and 11j has been illustrated, but the present invention is not limited to this, and for example, it may be adhered with an adhesive or the like.

Next, the structure of the third seal member S3 will be described. As shown in FIG. 9, the third sealing member S3 is composed of elastic members such as rubber, elastomer, and resin containing NBR, SBR, and CR, and has two curved side portions 31, 31 and curved side portions. The straight side portions 32, 32, ... The portion surrounded by the curved side portions 31, 31, the straight side portions 32, 32, ..., And the connecting portions 33, 33 functions as a surrounding portion.

The curved side portions 31, 31 are press-fitted into the peripheral portion of the upward convex portion 11b in the groove portion 11 m of the partition wall 11, and the straight side portions 32, 32, ... It is press-fitted into the lateral portion extending from the peripheral portion to both sides. When the first seal member S1 and the third seal member S3 are attached to the partition wall 11, the connection portions 24 and 24 of the first seal member S1 and the connection portions 33 and 33 of the third seal member S3 are connected. They are in contact with each other in a sealed manner (see FIG. 13).

In this embodiment, the curved side portions 31, 31, the straight side portions 32, 32, ..., And the connecting portions 33, 33 of the third seal member S3 are press-fitted into the groove portion 11 m of the partition wall 11. However, the present invention is not limited to this, and for example, it may be adhered with an adhesive or the like.

Next, as shown in FIG. 10, the upper lid portion 14 is suspended by the hanging tool C and the wire W and placed on the upper portion of the partition wall 11 with the opening / closing shaft 12 inserted. At this time, among the penetrating portions 61a provided in the cylindrical member 61, the locking members 62 and 62 are newly added to the penetrating portions 61a and 61a facing the direction of the pipe axis X (see FIG. 6A) of the fluid pipe 1. insert. As a result, the upper lid portion 14 is locked on the locking members 62, 62 and the partition wall 11, and the upper lid portion 14 is stably held by the cylindrical member 61. Further, as described above, there is a convex portion protruding upward on the outer diameter side of the locking member 62, which serves as an index for determining the position of the upper lid portion 14 and is brought into contact with the end portion of the penetrating portion 61a to withstand the load. Is further enhanced. The locking member 62 is preferably driven by, for example, a hydraulic jack or a screw mechanism jig, and is preferably driven by taking a reaction force on the penetrating portion 61a.

Further, when the upper lid portion 14 is suspended from the upper portion of the partition wall 11, one of the plurality of rod-shaped portions extending downward from the base portion of the predetermined jig J is provided with the positioning hole 14d of the upper lid portion 14 (see FIG. 11A). By suspending the upper lid portion 14 and inserting the other rod-shaped portion of the jig J into the hole (not shown) of the cylindrical member 61 to align the upper lid portion 14, the position of the upper lid portion 14 in the circumferential direction can be determined. It can be hung while being properly positioned with respect to the partition wall 11 held by the cylindrical member 61.

As shown in FIG. 11, the upper lid portion 14 has a substantially circular shape when viewed from above, and the ridge portions 14a and 14b and the ridge portions 14a and 14b provided on the peripheral surface of the upper lid portion 14 vertically and vertically apart from each other. A concave groove 14c formed between the two, a plurality of positioning holes 14d provided on the peripheral edge of the upper surface of the upper lid portion 14, a plurality of holes 14e corresponding to the screw holes 11k of the partition wall 11, and an opening / closing shaft 12 are inserted. It comprises a possible opening 14f.

Of the ridges 14a and 14b, the upper surface of the ridges 14a arranged on the upper side is an inclined surface 14g that inclines downward toward the outer diameter side. Further, among the ridges 14a and 14b, the ridges 14b arranged on the lower side are formed with notch recesses 14h at two positions facing each other in the circumferential direction, and a part of the notch recesses 14h communicates with each other. It communicates with the concave groove 14c via the portion 14j.

Next, the structure of the second seal member S2 will be described. As shown in FIG. 12, the second seal member S2 is composed of an elastic member such as rubber, elastomer, or resin containing NBR, SBR, and CR, and has a substantially circular annular portion 91 and an annular portion 91. It is provided with connecting portions 92 and 92 provided at two opposing locations. The connecting portion 92 has a convex portion 92A having a substantially trapezoidal cross-sectional view that projects downward so as to taper downward. The connecting portion 92 is arranged on the lower side of the annular portion 91 via the connecting portion 92a, and bulges toward the other connecting portion 92 (toward the inner diameter side). Although a notch is formed on the lower outer side in the front view of the convex portion 92A, the notch may not be provided.

The annular portion 91 is press-fitted into the concave groove 14c of the upper lid portion 14, the connecting portion 92a is press-fitted into the communication portion 14j, and the connecting portions 92 and 92 are press-fitted into the notch recess 14h. Further, when the second seal member S2 is attached to the upper lid portion 14, the convex portion 92A projects downward from the convex strip portion 14b (see FIG. 13).

In this embodiment, the annular portion 91, the connecting portion 92a, and the connecting portions 92, 92 of the second seal member S2 are press-fitted into the recessed groove 14c, the communicating portion 14j, and the notch recess 14h in the upper lid portion 14. However, the present invention is not limited to this, and for example, it may be adhered with an adhesive or the like.

As described above, when the upper lid portion 14 is suspended above the partition wall 11, the convex portion 92A of the second seal member S2 is unevenly fitted in the concave portion 24A of the first seal member S1 as shown in FIG. The connection portion 24 of the first seal member S1 and the connection portion 92 of the second seal member S2 come into contact with each other in a sealed manner. Since the tapered surfaces of the convex portion 92A and the concave portion 24A are guided by each other, the upper lid portion 14 is suspended downward and at the same time positioned in the plane direction, and the connection portion 24 of the first seal member S1 and the second seal are sealed. The connecting portion 92 of the member S2 can be fitted in an uneven manner with high accuracy.

Further, the third seal member S3 is pressure-welded between the dividing surfaces of the partition wall 11 and the upper lid portion 14. Then, by screwing a connecting member such as a bolt (not shown) into the screw hole 11k of the partition wall 11 and the hole 14e of the upper lid portion 14, the third seal member S3 is formed between the dividing surfaces of the upper lid portion 14 and the partition wall 11. Further pressure welding connects them in a sealed manner, and as shown in FIG. 14, the butterfly valve 10 is configured. The connecting member is hermetically surrounded by the third sealing member S3 between the dividing surfaces of the upper lid portion 14 and the partition wall 11. The connection portions of the first seal member S1, the second seal member S2, and the third seal member S3 may be fitted in a concavo-convex shape, or planes may be connected to each other.

In this embodiment, the butterfly valve 10 is configured on the cylindrical member 61 by fixing the upper lid portion 14 to the integrated partition wall 11, the opening / closing shaft 12, and the valve body 13, but the partition is illustrated. The butterfly valve 10 may be configured by separately installing the wall 11, the opening / closing shaft 12, the valve body 13, and the upper lid portion 14 in this order. Further, the butterfly valve 10 may be formed by integrating the partition wall 11 and the valve body 13, integrating the opening / closing shaft 12 and the upper lid portion 14, and assembling them. That is, at least the upper lid portion 14 can be freely changed as long as it is separated from other members (main body portion) and the butterfly valve 10 is formed by assembling them.

Further, the butterfly valve 10 has a water filling hole in the valve wing portion of the valve body 13, and by making the valve body 13 a small opening, it is safe to control the fluid little by little on the downstream side by the water filling hole. A water-filled butterfly valve that can be passed through is preferable. By doing so, it is possible to eliminate the bypass pipe that communicates with the upstream side and the downstream side of the conventional valve, and to reduce the size and simplification of the housing. Of course, valves other than the water-filled type can also be applied.

Next, as shown in FIG. 14, the mounting flange cylinder 63 penetrating in the vertical direction is suspended by the hanging tool C and the wire W and lowered to the upper part of the cylindrical member 61, and the mounting flange cylinder 63 is lowered above the cylindrical member 61. 63 is fixed by bolts and nuts (not shown).

Further, since an annular packing (not shown) is pressure-welded between the cylindrical member 61 and the mounting flange cylinder 63, the sealing property between the cylindrical member 61 and the mounting flange cylinder 63 can be ensured. The packing may be press-fitted into the annular groove formed on the lower surface of the mounting flange cylinder 63, or may be press-fitted into the annular groove provided on the cylindrical member 61 side.

Next, the valve suspension fitting 64 connected to the butterfly valve 10 is temporarily installed on the mounting flange cylinder 63. Specifically, with the lid 65 of the mounting flange cylinder 63 connected above the valve hanging bracket 64, the lid 65 is suspended by the hanging tool C and the wire W and lowered to above the mounting flange cylinder 63. The valve suspension fitting 64 includes a mounting surface portion 64a that faces in a substantially horizontal direction, and a cylindrical shaft portion 64b that extends upward from the substantially center of the mounting surface portion 64a. Further, an adapter 66 is connected to the upper end portion of the shaft portion 64b.

Further, the lid body 65 is formed with a through hole 65a penetrating in the vertical direction at the center thereof, and the adapter 66 is inserted through the through hole 65a. Further, the lid body 65 is formed with a plurality of recesses 65b recessed in the outer radial direction from the inner peripheral surface of the through hole 65a in the circumferential direction, and the recesses 65b can advance and retreat in the radial direction of the through hole 65a. A fixing jig 67 is arranged. The valve suspension fitting 64 and the lid 65 are integrated by projecting the fixing jig 67 in the inner diameter direction of the through hole 65a and engaging the fixing jig 67 with the lower surface of the annular protrusion 66a of the adapter 66.

With the lid 65 placed on the upper end of the mounting flange cylinder 63, the mounting flange cylinder 63 and the lid 65 are aligned and fixed with bolts and nuts (not shown). After that, the support mechanism 7 is installed on the lower flange 65d of the lid 65.

Since the packing is pressure-welded between the mounting flange cylinder 63 and the lid 65 in the circumferential direction, the sealing property between the mounting flange cylinder 63 and the lid 65 can be ensured. The packing may be press-fitted into the concave groove provided on the lid 65 side, or may be press-fitted into the concave groove provided on the mounting flange cylinder 63 side.

Next, the drive mechanism 8 is connected to the valve suspension fitting 64. The drive mechanism 8 is the same as that used when cutting the fluid pipe 1. Further, since the connection between the drive mechanism 8 and the valve suspension fitting 64 is the same as the connection between the drive mechanism 8 and the cutter 52 during the cutting operation of the fluid pipe 1 described above, the description thereof will be omitted.

Next, although not particularly shown, the valve suspension fitting 64 is lowered by the drive mechanism 8, and the mounting surface portion 64a of the valve suspension fitting 64 and the upper lid portion 14 of the butterfly valve 10 are connected by bolts and nuts (not shown). At this time, it goes without saying that the lower end of the butterfly valve 10 is adjusted so as not to come into contact with the valve body 42. After that, the butterfly valve 10 is inserted into the cut portion of the fluid pipe 1 by the drive mechanism 8.

As shown in FIGS. 10 and 17, on the inner wall surface of the side portion of the housing 2, side wall step portions 2c and 2c protruding inward of the housing 2 from other portions are formed so as to face each other. .. The side wall step portion 2c is tapered so as to gradually approach each other downward, similarly to the side portions (second side portions 23, 23) of the first seal member S1 described above. Therefore, as shown in FIG. 15, when the butterfly valve 10 is inserted into the housing 2, the side portions (second side portions 23, 23) of the first seal member S1 are close to the side wall step portions 2c. It is inserted into the housing 2 in a separated state, and at the same time the butterfly valve 10 is installed in the housing 2, the second side portions 23, 23 are pressed against the side wall step portion 2c.

Further, when the butterfly valve 10 is inserted into the housing 2 at a predetermined depth, the bottom portion (annular portion 21, first side portions 22, 22) of the first seal member S1 of the butterfly valve 10 becomes the housing 2. The lower convex portion 11c is loosely fitted into the concave portion 2e of the housing 2 while being pressed against the bottom wall step portion 2d (see FIG. 17) formed on the inner wall surface of the bottom portion. As a result, it is possible to prevent the butterfly valve 10 from being significantly tilted with respect to the housing 2 during the insertion operation. Further, when the butterfly valve 10 is inserted into the housing 2 at a predetermined depth, the outer peripheral surface (annular portion 91) of the second seal member S2 is pressure-welded over the entire circumference of the inner wall surface of the branch portion 2a. ..

Next, a plurality of presser screws N2 provided in the circumferential direction of the branch portion 2a of the housing 2 and which can move forward and backward in the radial direction are advanced in the inner diameter direction of the branch portion 2a. As a result, the presser screw N2 is locked so as to press the upper lid portion 14 from above, and the butterfly valve 10 is prevented from coming out of the branch portion 2a. Since the tip of the presser screw N2 has a tapered shape and the tip of the presser screw N2 is in sliding contact with the inclined surface 14g of the upper lid portion 14, it is possible to correct a slight inclination of the upper lid portion 14. ..

In this way, the presser screw N2 presses the upper lid portion 14 from above to remove the drive mechanism 8, the valve hanging bracket 64, the lid body 65, the mounting flange cylinder 63, the cylindrical member 61, and the work valve 4 from the housing 2. You will be able to do it.

As described above, in the butterfly valve 10, when the butterfly valve 10 is inserted into the housing 2, the downward convex portion 11c is loosely fitted into the concave portion 2e of the housing 2, so that the butterfly valve 10 is fitted to the housing 2. Although it is possible to prevent a large tilt, a gap is formed between the downward convex portion 11c and the concave portion 2e. May also tilt slightly. For example, as shown in FIG. 15, due to the influence of the fluid flowing from the left side to the right side of the drawing, the lower end portion (downward convex portion 11c side) which is the free end side when the butterfly valve 10 is installed. May tilt to the downstream side (right side of the drawing). In the flow control device of this embodiment, even when the butterfly valve 10 is tilted from an appropriate angle, the tilt of the butterfly valve 10 with respect to the housing 2 can be finely adjusted.

Specifically, as shown in FIG. 16, after the butterfly valve 10 is installed in the housing 2, the presser screw N2 is screwed inward to press the upper lid portion 14, and the drive mechanism 8, the valve suspension bracket 64, and the like. The lid body 65, the mounting flange cylinder 63, the cylindrical member 61, and the work valve 4 are removed from the housing 2. After that, of the screw holes 2g and 2g provided so as to penetrate both wall portions in the same direction as the pipe shaft X in the recess 2e of the housing 2, the pressing force retracted into the screw hole 2g on the downstream side (right side in the drawing). The screw N3 is operated from the outside to press the downward convex portion 11c to the upstream side (left side in the drawing), and the butterfly valve 10 is adjusted until the inclination of the butterfly valve 10 with respect to the housing 2 becomes appropriate. At this time, the angle of the butterfly valve 10 is adjusted while sliding on the bottom wall step portion 2d in which the second seal member S2 is used as a fulcrum and the bottom portion of the first seal member S1 is flat. The butterfly valve 10 is preferably adjusted at a position where the partition wall 11 is perpendicular to the bottom surface of the housing 2 and orthogonal to the pipe axis direction.

After that, the pressing screw N3 screwed into the screw hole 2g on the upstream side (left side in the drawing) is operated from the outside to advance, and the downward convex portion 11c is narrowed by the pressing screws N3 and N3 on the upstream side and the downstream side. That is, the pressing screws N3 and N3 have a function of not only finely adjusting the inclination of the butterfly valve 10 with respect to the housing 2 but also preventing the partition wall 11 from inclining due to the fluid pressure.

Further, when the downward convex portion 11c is narrowed by the pressing screws N3 and N3 on the upstream side and the downstream side, the tips N31 and N31 of the pressing screws N3 and N3 may be made to bite into the downward convex portion 11c. According to this, since the locking recesses 11p and 11p for locking the pressing screws N3 and N3 are formed on the peripheral surface of the downward convex portion 11c, the butterfly valve 10 is moved by the water pressure of the fluid to the shaft of the downward convex portion 11c. It is possible to prevent rotation around the center. The shape of the tips of the pressing screws N3 and N3 is a flat surface in this embodiment, but the shape is not limited to this, and for example, a sharp shape may be used.

Next, the lid member 16 having an annular shape on the upper surface is fixed to the flange 2b of the branch portion 2a. The lid member 16 is provided with a protruding piece 16a that projects downward in an annular shape, and the protruding piece 16a presses the upper surface of the upper lid portion 14 from above, so that the butterfly valve 10 comes out of the branch portion 2a together with the holding screw N2. To prevent. As a result, the installation of the butterfly valve 10 in the housing 2 is completed. Needless to say, 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 configured by installing the butterfly valve 10 as a fluid control in the housing 2, and is configured by the partition wall 11 (a part of the main body). ) Is provided on the tip side in the insertion direction as a fitting portion, and the downward convex portion 11c is fitted into the inner bottom portion of the housing 2 with the butterfly valve 10 inserted into the housing 2. A concave portion 2e is provided as a fitting portion to be fitted, and a pressing screw as a position adjusting portion for adjusting the inclination of the butterfly valve 10 with respect to the housing 2 between the downward convex portion 11c and the concave portion 2e. N3 is provided. According to this, at the insertion depth of the butterfly valve 10 in a state where the downward convex portion 11c of the partition wall 11 is fitted to the concave portion 2e in the housing 2, the pressing screw N3 does not affect the insertion depth. Since the inclination of the butterfly valve 10 can be adjusted so that the butterfly valve 10 can be aligned with the housing 2, the sealing performance of the butterfly valve 10 installed in the housing 2 with high accuracy can be stably improved.

In other words, the housing is provided with a depth adjustment step of adjusting the insertion depth of the butterfly valve 10 with the downward convex portion 11c and the concave portion 2e fitted in the insertion direction, and an insertion depth adjusted in the depth adjustment step. Since the alignment step of adjusting the inclination of the butterfly valve 10 with respect to 2 and performing the alignment can be performed, the butterfly valve 10 can be installed in the housing 2 with high accuracy.

Further, when adjusting the inclination of the butterfly valve 10 with the pressing screw N3, the second seal member S2 that seals the inner wall surface of the branch portion 2a with the butterfly valve 10 inserted in the housing 2 is used as a fulcrum. Since the inclination of the butterfly valve 10 is adjusted, the second seal member S2, which is a fulcrum of the inclination adjustment, hardly moves when the inclination of the butterfly valve 10 is adjusted, and the sealing property can be maintained even if the inclination is adjusted.

Further, the pressing screws N3 are provided on both wall portions in the concave portion 2e in the same direction as the pipe shaft X, and press the downward convex portion 11c in the direction of the pipe shaft X of the fluid pipe 1. That is, since the butterfly valve 10 can press the downward convex portion 11c in the direction of the pipe axis X that is most susceptible to the influence of the fluid in the fluid pipe 1, the inclination can be adjusted with high accuracy. Even after the adjustment, the pressure of the fluid in the pipe acts on the butterfly valve 10 toward the downstream side. In particular, since the pressing screw N3 on the downstream side of the butterfly valve 10 supports the downward convex portion 11c, the butterfly valve The tilt of 10 is prevented for a long period of time. In this embodiment, the mode in which the pressing screw N3 is provided on both wall portions of the recess 2e is illustrated, but the pressing screw N3 is provided at least on the downstream side of the fluid in the fluid pipe 1 and is provided from the downstream side. It suffices if the downward convex portion 11c can be pressed toward the upstream side.

Further, the pressing screw N3 is a rotation preventing portion for preventing the downward convex portion 11c from rotating, and the pressing screws N3 are formed into the downward convex portion 11c by causing the tips N31 and N31 of the pressing screws N3 and N3 to bite into the downward convex portion 11c. , Since the locking recesses 11p and 11p to which N3 is locked are formed, it is possible to prevent the butterfly valve 10 from rotating together with the position adjustment of the butterfly valve 10. The locking recesses 11p and 11p may be provided in advance.

Further, a bottom wall step portion 2d as a flat seal seat surface that is connected to the recess 2e and is in close contact with the bottom portion of the first seal member S1 is formed on the inner bottom portion of the housing 2, and the butterfly valve 10 is formed by the pressing screw N3. When adjusting the inclination, not only the angle of the butterfly valve 10 can be easily adjusted while sliding on the bottom wall step portion 2d where the bottom of the first seal member S1 is flat, but also the first seal member S1 is twisted or the like. Sealability can be maintained without occurring. In other words, since the bottom wall step portion 2d is not formed with irregularities, it does not affect the angle adjustment of the butterfly valve 10 and the sealing performance of the first sealing member S1.

Further, the recess 2e is provided with a drain 15 that can open and close the inside of the housing 2. Specifically, the bottom plate 2f of the recess 2e is formed with a mounting hole 15a to which the drain 15 can be detachably mounted. When the butterfly valve 10 is properly installed in the housing 2, the bottom portion of the first seal member S1 and the bottom wall step portion 2d are pressure-welded in a sealed manner so that fluid does not enter the recess 2e. Become. That is, the sealing performance of the position-adjusted butterfly valve 10 can be confirmed by opening the mounting hole 15a and checking whether or not the fluid leaks from the mounting hole 15a. After confirming the sealing performance of the butterfly valve 10, the mounting hole 15a is sealed with a cap or the like. Furthermore, it goes without saying that the sealing performance of the butterfly valve 10 can be confirmed by opening the valve of the drain 15 without removing the drain 15.

In this embodiment, a mode in which one pressing screw N3 is provided on the upstream side and one pressing screw N3 on the upstream side and the downstream side of the downward convex portion 11c is illustrated, but even if a plurality of pressing screws N3 are provided around the downward convex portion 11c. good. According to this, since the downward convex portion 11c can be pressed from a plurality of directions, the degree of freedom in tilt adjustment is high. Furthermore, the downward convex portion 11c is not limited to being formed in a substantially cylindrical shape, and may be formed in a rectangular shape in a plan view or the like.

Further, in the above embodiment, the embodiment in which the pressing screw N3 is used as the position adjusting portion for adjusting the inclination of the butterfly valve 10 with respect to the housing 2 to perform the positioning is illustrated, but as shown in FIG. 18, the housing 2 is used. The filler 17 is filled between the concave portion 2e and the downward convex portion 11c through the through holes 2h and 2h provided so as to penetrate both wall portions in the same direction as the pipe axis X in the concave portion 2e. It may be (modification example 1). In this case, by filling the filler 17 from the through hole 2h on the downstream side (right side in the drawing), the inclination of the butterfly valve 10 with respect to the housing 2 is adjusted by the pressure of the filler 17. Further, after the inclination is adjusted, the inclination of the butterfly valve 10 with respect to the housing 2 from the through holes 2h and 2h on both sides of the filler 17 is maintained in an appropriate state. Further, the inner peripheral surface of the concave portion 2e, the surface of the filler 17, and the outer peripheral surface of the downward convex portion 11c are used as rotation prevention portions, and the butterfly valve 10 can be prevented from rotating due to mutual friction between these surfaces.

Further, as another modification of the position adjusting portion, as shown in FIG. 19, spacers 18 and 18 composed of a metal plate or the like inserted between the concave portion 2e and the downward convex portion 11c may be used. (Modification example 2). The spacers 18 and 18 are inserted between the concave portion 2e and the downward convex portion 11c from the lower side by removing the bottom plate 2f of the concave portion 2e from the housing 2 after inserting the butterfly valve 10 into the housing 2 at a predetermined depth. Will be done. The inclination of the butterfly valve 10 can be adjusted by preparing a plurality of types of spacers 18 having different thicknesses and appropriately inserting spacers 18 having a predetermined thickness between the concave portion 2e and the downward convex portion 11c. The spacer 18 is fixed to the bottom plate 2f, and may be inserted between the concave portion 2e and the downward convex portion 11c by fixing the bottom plate 2f to the housing 2.

Further, in the above embodiment, the embodiment in which the butterfly valve 10 is used as the control fluid is illustrated, but the downward convex portion 11c (fitting portion), the concave portion 2e (fitted portion), and the pressing screw N3 (position adjusting portion) are used. If it has, for example, as shown in FIG. 20, it may be changed to a sluice valve 100 that opens and closes the flow path in the fluid pipe 1 (modification example 3). The sluice valve 100 is integrally formed with a sluice wall 101, an opening / closing shaft 102, a valve body 103, and an upper lid portion 104. The partition wall 101 has an opening penetrating in the pipe axis direction of the fluid pipe 1, and the valve body 103 is between a position where the opening of the partition wall 101 is closed and a position where the opening is opened by operating the opening / closing shaft 102. It is possible to move up and down with.

Next, the procedure for attaching the drive mechanism 8 of the modified example 4 will be described. Here, an embodiment in which the cutter 52 and the drive mechanism 8 are connected will be described as an example.

As shown in FIG. 21A, when connecting the drive mechanism 8 to the cutter 52, first, a plurality of jacks 70 are arranged in the circumferential direction of the upper flange 53c of the lid 53, and the hanging tools C and The drive mechanism 8 is suspended by the wire W, and the case portion 86 is placed on the jack 70. Next, the operator accesses from the gap between the case portion 86 formed by the jack 70 and the upper flange 53c of the lid 53 to connect the shaft member 81 and the adapter 54.

Next, as shown in FIG. 21B, the shaft member 81 is gripped by the gripping member 82, and the gripping member 81 is released from being gripped by the regulation member 84. Then, the expandable cylinder 88 provided between the advancing / retreating member 83 and the base member 85 is contracted, and the regulation member 84, the base member 85, and the case portion 86 are raised. As a result, the case portion 86 is separated upward from the jack 70, so that the jack 70 can be removed from the upper flange 53c.

After removing the jack 70 from the upper flange 53c, the case portion 86 is placed on the upper flange 53c and fixed by bolts and nuts (not shown) by extending the cylinder 88 as shown in FIG. 21 (c). After that, as shown in FIG. 21D, the cylinder 88 is contracted again, the shaft member 81, the adapter 54, and the cutter 52 are raised, and the fixing jig 55 is retracted into the recess 53b. At this time, the drive mechanism 8 and the cutter 52 may be connected while being suspended by a crane.

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 embodiment, the embodiment in which the butterfly valve 10 is used as the control fluid is illustrated, but the present invention is not limited to this, and the control fluid may be, for example, a sluice valve, a plug, a switching valve, or the like. Further, for example, in the above embodiment, the mode in which the working valve 4 is composed of a plurality of divided bodies and these divided bodies are lifted in order is illustrated, but the present invention is not limited to this, and the working valve may be integrally lifted or integrally configured. good.

Further, in the above embodiment, the butterfly valve 10 has a divided structure including a partition wall 11 which is a main body portion, an opening / closing shaft 12 and a valve body 13, and an upper lid portion 14 which is a lid body portion, but the present invention is not limited to this. The partition wall 11, the opening / closing shaft 12 and the valve body 13 may be further divided, or the members may be integrated.

Further, in the above embodiment, the embodiment in which the fitting portion of the fluid control fluid is the downward convex portion 11c and the fitting portion of the housing is the concave portion 2e is illustrated, but the present invention is not limited to this, and the fitting portion can be unevenly fitted to each other. It may be sufficient, and the fitting portion of the fluid control fluid may have a concave shape, and the fitted portion of the housing may have a convex shape.

1 Fluid pipe 2 Housing 2a Branch (opening)
2c Side wall step 2d Bottom wall step (seal seat surface)
2e recess (fitted part)
2f Bottom plate 2g Screw hole 2h Through hole 4 Work valve 5 Cutting machine 7 Support mechanism 10 Butterfly valve (fluid control)
11 Partition wall (main body)
11c Downward convex part (fitting part)
12 Open / close shaft (main body)
13 Valve body (main body)
14 Upper lid (lid)
15 Drain (drain part)
17 Filler (position adjustment part)
18 Spacer (position adjustment part)
52 Cutter 100 sluice valve (control fluid)
101 partition wall (main body)
102 Open / close shaft (main body)
103 Valve body (main body)
104 Upper lid part (cover body part)
N1 Bolt nut N2 Pressing screw N3 Pressing screw (pressing part)
N31 tip (rotation prevention part)
S1 1st seal member (1st seal part)
S2 2nd seal member (2nd seal part)
S3 3rd seal member

Claims (6)

The main body that controls the flow path in the housing that is hermetically attached to the fluid pipe, the lid that closes the opening of the housing, and the inner wall surface of the housing that is provided in the main body are sealed. A flow control fluid having a first seal portion and a second seal portion provided on the lid body portion for sealing the inner wall surface of the opening portion is inserted into the housing in a continuous flow state and installed. It ’s a device,
A fitting portion is provided on the tip end side in the insertion direction of the main body portion, and the fitting portion is fitted to the inner bottom portion of the housing with the control fluid inserted into the housing. The part is provided,
The fitted portion is provided with a position adjusting portion capable of advancing and retreating from the outside of the housing toward the fitting portion, and the position adjusting portion adjusts the inclination of the control fluid with respect to the housing to position the fitted portion. A flow control device characterized by being designed to perform alignment. The position adjusting portion is characterized in that the inclination of the controlling fluid is adjusted with the second sealing portion that seals the inner wall surface of the opening in a state where the controlling fluid is inserted into the housing as a fulcrum. The flow control device according to claim 1. The control according to claim 1 or 2, wherein the position adjusting portion includes a pressing portion provided on the fitted portion and pressing the fitting portion of the main body portion in the pipe axis direction of the fluid pipe. Flow device. The flow control device according to claim 3, wherein the pressing portion has a rotation prevention portion that prevents rotation of the fitting portion by pressing the fitting portion. The control according to any one of claims 1 to 4, wherein a flat seal seat surface is formed on the inner bottom portion of the housing so as to be connected to the fitted portion and in close contact with the first seal portion. Flow device. The flow control device according to any one of claims 1 to 5, wherein the fitted portion is provided with a drain portion that can open and close the inside of the housing.

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